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Anhui Haoyuan Chemical Industry Group Co., Ltd. 5000 t / year pyrrolidone project environmental impact report Letters
Author:   Source:chief engineer   Published:2012-11-12   Viewed 2528 times

Project Name: Anhui Haoyuan Chemical Industry Group Co., Ltd. 5000 t / year pyrrolidone project
                                        Construction Unit: Anhui Haoyuan Chemical Industry Group Co., Ltd.
 
                                        Evaluation Unit: Anhui Research Institute of Chemical Industry
                                        Evaluation Certificate: EIA license B No. 2108
 
 
                                        Date of preparation: November 9, 2012
 
 
 
 
1 By Anhui Haoyuan Chemical Industry Group Co., Ltd. commissioned Anhui Haoyuan Chemical Industry Group Co., Ltd. 5000 t / year pyrrolidone environmental impact assessment of the project. In accordance with the relevant national regulations and requirements, and Anhui Haoyuan Chemical Group Limited agreed the second information dissemination to the public, the public EIA. This text content at this stage the outcome of the EIA, the next stage will listen to the views of the public, experts on the basis of further revise and improve.
2 of the construction project
(1) Project Name: Anhui Haoyuan Chemical Industry Group Co., Ltd. 5000 t / year pyrrolidone project
(2) Project location: Anhui Haoyuan Chemical Industry Group Co., Ltd. existing ISBL
(3) Project Background
Anhui Haoyuan Chemical Industry Group Co., Ltd. Company production of ammonia, purchased methylamine, ethylamine as raw material, the new raw material warehouse, finished products, the methylamine storage tanks, ethylamine tank, electric heat conducting oil furnace and companies rely on existing water supply and drainage, for gas, electricity and other public works and sewage treatment facilities, the construction of 5,000 tons / year pyrrolidone project.
(4) Project Content
The project is divided into two implementation, a project of a new set of 3000 tons / annual the pyrrolidone production device, used in the production of N - methyl - pyrrolidone main equipment: high-pressure tube reactor deamination tower off the light tower, ammonia recovery tower, off Pagoda. And a new raw material warehouse and finished a 2 100m3 of methylamine tank and an electric heat conduction oil furnace. At the same time supporting the construction of a tail gas absorption tower and sulfate process waste gas absorption tank. The project required for drainage, steam supply, power supply, and other public works and sewage treatment facilities relying Haoyuan Chemical Industry Group Co., Ltd. of existing facilities. Second phase project of the new set of the pyrrolidone production device, used in the production of 1000 t / α-pyrrolidone and 1000 tons / year N - ethyl - pyrrolidone, two new 100m3 ethylamine tank and supporting the construction of an exhaust absorption Tower and sulfuric acid absorption tank. The proposed project features the following table.
 
Table 1 a Project Characteristics Table
Engineering
Class single project
Name engineering content and scale with the existing projects relying on relationship
Subject
Engineering N-methyl - pyrrolidone new sets of N-methyl - pyrrolidone production device, with an annual output of pyrrolidone 3000 tons; 2-tube high-pressure reactor equipment, 1 deamination tower and sets off the light tower, an ammonia recovery tower and sets off Pagoda. -
Aid
Engineering hollow floor and central laboratory to build a new control building area of ​​357.5m2 relying on existing engineering laboratory building
Storage and transportation engineering warehouse district to build a new raw material warehouse for the storage of raw material r-butyrolactone, raw material storage area is 45 * 21 = 945m2. -
Build a new finished goods warehouse for product N-methyl - pyrrolidone storage, finished goods warehouse area of ​​45 * 21 = 945m2. -
Tank Farm New the 2 100m3 vertical the methylamine tank, the tank size of as ø3200 * 11500. -
Public
Engineering heating production device 1.9t / h; steam consumption for a new 55kw electric heat conduction oil furnace. Relying on the existing project for the steam pipe network
Supply a new 10kv substation and distribution, new 1 set 10/0.4kv transformer powered devices rely on existing works
Water supply water for 102.2m3 / d water supply network rely on existing works
Circulating cooling water system circulating water system circulating volume of 432m3 / h circulating cooling water systems relying on existing projects
Environmental protection
Engineering wastewater reuse condensate part off the light tower, part of the fed-plant sewage treatment station, waste water capacity of 7.6 m3 / d relying factory existing sewage treatment station
Exhaust gas the amine recovery tower exhaust to enter the recovery of exhaust gas recycling tower and then after 5% dilute sulfuric acid, and after emissions, exhaust tube height is 15m. Exhaust gas recycling units in Tower 1, a dilute sulfuric acid tank. -
Solid waste to create a new 100 m2 hazardous waste temporary spaces
Noise control sound insulation, damping
The accident emergency Pool - relying on emergency pool of factory 6000m3
 
Table 2 two project characteristics table
Engineering
Engineering content and scale of the name of the class single project and a project relying on relationships
Subject
Engineering α-pyrrolidone and N-ethyl - pyrrolidone new sets of the pyrrolidone production device for the production of α-pyrrolidone and N - ethyl - pyrrolidone, the annual production of α-pyrrolidone 1000t, the annual production of N ethyl - pyrrolidone 1000t. Major equipment tube high-pressure reactor, the deamination tower, one off the light tower, ammonia (amine) recovery tower, 1 off Pagoda. /
Aid
Control building project - relying on a project
The storage engineering warehouse district for the storage of raw material r-butyrolactone relying a raw material warehouse
For the product N-ethyl - pyrrolidone and a-pyrrolidone storage. Relying on a finished goods warehouse
The tank farm the New of 2 100m3 Vertical ethylamine tank, the tank size of as ø3200 * 11500. Relying on a tank farm
Public
Engineering heating production plant steam consumption for 1.3t / h, add a 55kw electric heat conducting oil furnace. Relying on the existing project for the steam pipe network
Supply - relying on an existing engineering-powered devices
Water supply - relying on the existing projects of water supply pipe network
Circulating cooling water system circulating water system circulating volume of 288m3 / h circulating cooling water systems relying on existing projects
Environmental protection
Engineering wastewater off a light tower the condensate portion reuse, and fed into the plant sewage treatment station Relying on the factory existing sewage treatment station
The the exhaust ammonia (amine) recovery tower exhaust into the exhaust gas recycling tower recycling, re-entering the emissions and 5% dilute sulfuric acid tank, exhaust tube height is 15m. Exhaust gas recycling units in Tower 1, a dilute sulfuric acid tank. -
Solid Waste - relying on a hazardous waste temporary place
Building sound insulation of noise control, vibration damping, etc. -
The accident emergency pool - rely on existing emergency pool
(5) Production
The project to ammonia, methylamine, ethylamine, and r-D lactone continuous production process production pyrrolidone products as raw material, the use of state-of-the-art pipeline reactor. Confined conditions throughout the production process, the DCS control technology, centralized control over the production process temperature, pressure, flow, high degree of automation, stable and reliable technology, good safety performance.
(6) the scale of production: 5000 tons / year pyrrolidone series products.
(7) program: 3000 tons / year N-methyl - pyrrolidone, 1000 tons / year the N ethyl - pyrrolidone, 1000 tons / year α-pyrrolidone.
(8) Investment and construction period
The total investment of 67,539,400 yuan, of which about $ 1.5 million of the total investment in environmental protection, the total investment ratio of 2.2%. A project is expected to put into operation in 2013, the second phase is expected to put into operation in 2014.
(9) project with the laws and regulations, consistent policy site selection and planning of Conformance
The project does not belong to the "industry restructuring Catalog (2011) in the restricted class and out of class projects, can be regarded as allowing construction projects. Meet the requirements of the national industrial policy.
Fuyang City, the industrial layout and overall planning of Fuyang City, Anhui Haoyuan Chemical Industry Group Co., Ltd. chemical concentration area and industrial land within the site is located in the planning. The existing ISBL project in Anhui Haoyuan Chemical Industry Group Co., Ltd., set aside open space on the building, no new land, therefore, the overall planning of the project site complies with the Fuyang City.
Construction projects around the state of the environment
(1) the construction of the project site of the state of the environment
Monitoring results of the local environmental quality of the project according to the Environmental Monitoring Station of Fuyang City:
Pollutants of SO2 in the environment of the Project Area Air of NO2-hour average concentration of SO2, NO2, TSP, PM10, the status of daily average concentration monitoring value to meet the requirements of the secondary standard "Ambient Air Quality Standard" (GB3095-96), is not exceeded phenomenon. Regional air environmental ammonia concentration time value in line with the "Design of Industrial Enterprises Standard" (TJ36-79) Table 1 "maximum allowable concentration" of harmful substances in the air of residential areas standard.
Project by the the Ji River receiving water main pollutants COD, BOD5, ammonia nitrogen, total phosphorus monitoring are excessive, and that surface water economy River evaluate river water quality can not meet the "Surface Water Environment Quality Standard (GB3838-2002) IV class standard requirements, according to the site survey, the domestic wastewater emissions in the surrounding villages is the main reason for the excessive. Project Area groundwater monitoring indicators, pH, total hardness, permanganate index, cyanide, fluoride, ammonia, nitrate, sulfate, phenol, chloride, lead, arsenic, copper, total coliforms are in line with groundwater quality standards "(GB/T14848-93) standard Ⅲ classes.
The project factory sector in addition to the the Dongchang sector night South plant boundary daytime and slightly exceeded due to road traffic noise impact, other plant boundary noise meet GB3096-2008 "industrial enterprises ambient noise emission standards" (GB 12348-2008 ) 3; sound and environmentally sensitive point to meet the standard requirements of GB3096-2008 "sound environmental quality standards for Class 2.
(2) construction project environmental impact assessment.
Emission sources for the center ① Atmospheric scope of the evaluation: a side length of 2.5km rectangular area.
② surface water evaluation: project drainage reaches into Fumeng River waste (sewage ditch) and eventually discharged into the economy by the Los Ravine River, the scope of the evaluation from the river at the upstream Los Ravine into economic 200m to economy River 5000m, full-length about 5.2km reach.
③ the noise outside the scope of the evaluation: project plant boundary 200m range.
The ④ groundwater evaluation Range: 20km2
In addition to the the Dongchang sector night Southern factory sector daytime and slightly exceeded due to road traffic noise impact, other plant boundary noise meet GB3096-2008 "industrial enterprises ambient noise emission standards (GB 12348-2008) ; acoustic environment sensitive points meet GB3096-2008 standard requirements of sound environmental quality standards for Class 2.
 
Drawings atmosphere scope of the evaluation of a project and to protect the target distribution
4, predict the environmental impact of construction projects and intends to take measures with effect
(1) construction projects of major types of pollutants, emission concentrations, emissions, handling, emissions and ways the discharge standards, the environmental impact of the ways, manner and scope of
① organized emissions of the project from the recovery column, ammonia (amine), off the light tower, off the heavy tower vacuo noncondensables, exhaust pollutants main ingredients of ammonia, methylamine, ethylamine, exhaust absorber water absorption, and then by dilute sulfuric acid absorbed pollutants ammonia, methylamine, ethylamine emissions are consistent the emitted pollutant discharge standard "(GB14554-93) in Table 2 Standard limit through the discharge height of 15 m tube discharge standards. The project unorganized emissions from the production plant equipment, pipes, valves are not tight at run, run, drip, drain distributing a small amount of ammonia, methylamine, ethylamine. Contribution to the concentration of ammonia, methylamine, ethylamine in the factory sector can meet the the emitted pollutant discharge standard "(GB14554-93) in Table 1 of the secondary standard.
② the project process wastewater mainly off the light tower emissions condensing water and wastewater vacuum system replacement, major pollutants COD, ammonia. In addition to equipment floor the rinse wastewater tank farm and device area early rain, circulating cooling water system replacement drainage. Circulating cooling water system drainage clean water can be discharged directly; Other wastewater collection evacuation emissions standards of the company's existing sewage treatment station, and eventually discharged into the Ji River.
③ The solid waste kettle off the Pagoda residue and garbage. The autoclave residue intends send qualified unit treatment and disposal. Unified disposal of garbage by the municipal sanitation department. All solid waste to be properly disposed of.
Vacuum unit ④ the project noise equipment, various types of pumps, shock absorber, muffler after treatment, the plant boundary noise meet emission standards.
(2) construction projects within the scope of the evaluation of the environmental protection goals
Environmental protection goals within the scope of the project evaluation within the scope of the evaluation Zhao Chuang, ZHAO Xiao Zhuang, South zhangzhuang, Chen Youfang village, six in primary schools, high Zhuang Yan Zhuang specific protection goals distribution shown in Figure 1.
(3) the environmental impact of construction projects and its prediction and evaluation
① construction period environmental impact
Anhui Haoyuan Chemical Industry Group Co., Ltd., the project on the existing venues construction, not new requisition land, a small amount of excavation, earthwork basic balance, a very small impact on the ecological environment. The construction period of the project is small, short construction period, domestic wastewater has been effectively controlled by the company sewage treatment station, construction dust, transport vehicles, vehicle exhaust and construction noise has less impact on the external environment.
② environmental impact of the operation period
a, atmospheric
According to forecasts, the project organized and unorganized emissions of pollutants ammonia, methylamine, ethylamine accounting standard was less than 10%,
Less impact on air quality of the environment around the site and will not reduce the project area ambient air quality levels.
b, surface water
Of the project's production process wastewater, shop floor rinse water pollution and device area early the rainwater harvesting evacuation evaluation of Anhui Haoyuan Chemical Industry Group Co., Ltd. The existing sewage treatment station to meet emissions standards, fewer new wastewater pollutant emissions, Ji River little effect on river water quality evaluation of river water quality can be basic maintenance of existing water quality conditions.
c, noise
This project is mainly producing noise device for a vacuum unit, various types of pumps, the noise level is about 75 to 85 dB (A). Muffler, damping and greening comprehensive prevention and control measures, in line with the national control standards. Predicted the plant boundary each to the daytime, nighttime noise added value of less than 3dB (A), the Dongchang sector night South plant boundary daytime noise predictive value exceeded the standards, the rest of the plant boundary daytime, nighttime noise predictive value to meet emissions standards . The Dongchang sector night South plant boundary daytime noise predictive value is exceeded, the acoustic environment sensitive points within 200 meters of the plant lay not cause noise nuisance phenomenon smaller external acoustic environment sensitive points of the plant boundary.
d, solid waste
The project's solid waste autoclave residue and garbage generated by the production process. The autoclave residue intends send qualified unit treatment and disposal. Garbage sent to urban waste disposal site centralized disposal. All solid waste will be properly disposed of, the external environment impact.
e, groundwater
Of the project's production workshop floor and tank floor and wastewater outfall ditch seepage control measures, etc. take the partition has little effect on groundwater environment.
(4) the environmental impact of construction projects on the environmentally sensitive areas and forecast evaluation
Environmentally sensitive areas of the project site surrounding settlements, predicted that after the completion of the project, the site surrounding settlements ammonia concentration of pollutants in the air to meet the industrial enterprises design health standards "(TJ36-79) neighborhood atmosphere of harmful substances in the highest allowable concentration limits, methylamine and ethylamine concentration meets the evaluation of the implementation of the standard value, the environmental impact is within an acceptable range.
(5) project pollution prevention measures to be taken in the implementation of standards, compliance status and treatment effect
(1) pollution prevention and control measures to be taken
air pollution prevention and control measures
This project a N - methyl - pyrrolidone device process exhaust gases: ammonia (amine) recovery tower exhaust off the light tower, off Pagoda vacuum noncondensables take a water absorber and dilute acid absorption device processing. The two engineering process exhaust device pyrrolidone take a water absorber and dilute acid absorption device processing.
b, surface water pollution prevention and control measures
The project off the light tower emissions condensate and vacuum system replacement wastewater collection, send Anhui the Haoyuan Chemical Corporation sewage treatment station. Of the project's production device, storage tank area around the construction of a ring ditch to intercept the rainwater rain within the closure area. The workshop floor wash water pollution and device area early rainwater collection, sending the company's sewage treatment station to meet the emissions.
c, groundwater pollution prevention measures
The project will reference the hazardous waste landfill pollution control standards "(GB18598-2001) in provisions on the storage tank area cofferdam, the wastewater outfall ditch, workshop floor focus impermeable area to be impermeable processing, to mitigate project on groundwater environmental pollution.
d, noise pollution control measures
The project mainly produced noise equipment vacuum unit, pump, take the shock absorber, muffler and other prevention measures to be integrated governance.
the e solid waste pollution prevention measures
The project will take off the Pagoda kettle residue disposal by the qualified units. Union garbage disposal by the municipal sanitation department.
② implementation of standards
a, project the exhaust emissions execution emitted pollutant discharge standard "(GB14554-93) Table 1 secondary standard and Table 2 emission limits;
b the project wastewater discharge to perform ammonia industrial water pollutant discharge standards "(GB13458-2001) Table 2 medium-sized enterprises emission standards;
c, project noise emissions perform boundary of industrial enterprises ambient noise emission standards "(GB12348-2008) 3 standard;
d, solid waste implementation of the national list of hazardous waste; GB5085.1-5085.7-2007 "hazardous waste identification standard"; GB18597-2001 "storage of hazardous waste pollution control standards; GB18599-2001" general industrial solid waste storage and disposal field of pollution control standards. "
(3) compliance status and effect
process tail gas of the project to take the governance measures governance pollutants ammonia, methylamine, ethylamine can meet emissions standards.
Production wastewater of the project, workshop floor wash water and the beginning of the device area contaminated rainwater Anhui Haoyuan Chemical Corporation sewage treatment station after treatment discharge standards.
c, the vacuum unit of the project produced noise equipment, pumps take a shock absorber, muffler measures governance, comply with the national control standards requirements.
d, all types of solid waste generated by the project can be obtained proper disposal or comprehensive utilization, disposal and utilization rate of 100%.
(6) environmental risk analysis and forecast results, risk prevention measures and contingency plans
① environmental risk analysis and forecast results
Environmental risks of the project set methylamine tank leak risk, according to the forecast, in set accident risk status, the leakage of methylamine risk value is less than the chemical industry risk statistics value of 8.33 × 10-5 / a project environmental risks within an acceptable range.
The ② risk preventive measures and contingency plans
The project is located in Anhui Haoyuan Chemical Corporation's existing plant in the region, relying on the company accident wastewater collection pool accident Fire wastewater collection withhold, not into nearby surface water bodies. In the siting and design of building structures, fire safety precautions and safety management system and other aspects of the project reflects the "prevention first, intrinsically safe" concept, to reduce the project's environmental potential risks, can reduce the impact of the accident, the accident state to a minimum. Strict compliance with the operation and management of the project "production rules", "architectural design code for fire protection requirements, and regulatory requirements of the dangerous chemicals business opening conditions and technical requirements", the fire protection measures, security measures construction put in place under the premise of Environmental Quality little effect on the level of environmental risk acceptable.
(7) construction project environmental protection measures, technical, economic feasibility studies
① The project to take water to absorb and dilute sulfuric acid to absorption treatment measures to deal with ammonia (amine) recovery tower exhaust off the light tower off Pagoda vacuum noncondensables are soluble in water, due to ammonia, methylamine, ethylamine, through efficient packed tower water absorption, the not absorbed pollutants and then take further dilute sulfuric acid absorption, can guarantee the the exhaust pollutants stable discharge, from a technical and economic point of view, the measures are feasible.
Emissions ② this project off the light tower condensate and vacuum system replacement wastewater main pollutants are organic compounds, ammonia. The workshop floor washing water and the device area early contaminated rainwater major pollutants of COD and ammonia Anhui Haoyuan Chemical Industry Group Co., Ltd., due to the small amount of water, the existing sewage treatment station affluent ability to meet the wastewater treatment needs of the project. Therefore, wastewater treatment project taken measures technology economically viable.
③ the project to take the solid waste disposal, the use of measures in line with the relevant provisions of the People's Republic of China Solid Waste Pollution Prevention and Control of Environmental Law and national solid waste management, disposal utilization measures are feasible.
(8) Environmental Economic Cost of construction projects
In order to ensure the level of environmental pollution project run various types of pollutant discharge, effective control of the project, the construction unit in accordance with the requirements of the design and the EIA, gas, waste water, solid waste and producing noise equipment take practical pollution control measures, the project supporting environmental protection facilities put into operation, will make a significant environmental and economic benefits.
(9) construction project protection unit distance relocation, resident of and related measures
According to calculations, the project health protection distance of 100 m, no residents within the range of concentrated residential areas, the project site to meet the requirements of units involved, the relocation of the residents.
(10) to be taken by the environmental monitoring plan and environmental management system
Anhui Haoyuan Chemical Industry Group Co., Ltd. is a sound environmental management agencies and environmental monitoring agency, the project will rely on the implementation of environmental monitoring programs and environmental management work. Environmental management agency primarily responsible for the implementation of the national environmental protection regulations and standards, inspection, supervision and project environmental protection facilities operation and environmental pollution accident investigation to establish the classification techniques of pollution sources files and monitoring file. Specific monitoring plan are as follows:
(1) wastewater
Monitoring Sites: Anhui Haoyuan Chemical Industry Group Co., Ltd. sewage treatment station, and out of the water, the company's total discharge port.
Monitoring Project and frequency: pH, COD, ammonia nitrogen.
(2) The exhaust gas
(1) Organized exhaust
Monitoring Project: ammonia, methylamine, triethylamine.
Monitor the distribution and frequency: annual monitoring of the discharge port of the exhaust gas treatment device.
② unorganized exhaust
Monitoring Project: ammonia, methylamine, triethylamine.
Monitoring Sites and frequency of monitoring at 4: In the production plant area downwind of the plant boundary, monitoring once a year, sampling once every two hours, were collected four times, whichever is the maximum measured value.
(3) Noise
Monitoring objects: equipment noise and noise at boundary
Monitoring frequency: annual monitoring once the plant boundary noise and equipment noise source noise.
5, public participation
(1) the number of public environmental information, content and manner
Undertake this project in Anhui Haoyuan Chemical Industry Group Co., Ltd. on the company's Web site and newspaper first publicized, the first publicity including the following: project name and corporate profiles, project construction unit name and Contact undertake evaluation The main issues of the environmental impact assessment of the work of the agency's name and contact information, environmental impact assessment procedures and job content, for public comment, and the main way for public comments. After the completion of the first draft of the report on the website in Fuyang City Commission by letter, the second announcement, the second publicity contents include: the construction project, the project's environmental impact and pollution prevention measures, environmental impact assessment report elements of conclusions, public way to query the environmental impact assessment report and the period for public comment the range and the main issues, the specific form for public comment, the beginning and ending time for public comments.
(2) the scope for public comment, the number and form of
The range of the environmental impact assessment for public comment is directly affected by the project sites and around the crowd, in addition, also indirectly affect the groups and representatives and the other person more concerned about the project. The environmental impact assessment for public comment mainly to the issuance of public participation in the form of a questionnaire, in addition to the rating agencies, the public can also send e-mail, fax, letter, published opinions and views about the construction of the project and the environmental (accept only the issues related to the protection of the environment). Contact details can be found on seven public comments to try to leave your real name and basic (unit or residence, education level, occupation, Contact, etc.), so that needed feedback when necessary for a return visit.
(3) the organizational form of public participation
Entrustment by the construction unit in Anhui Haoyuan Chemical Group Co., Ltd. was first publicized on the company website and newspaper publicity time for 10 days. The second publicity after the completion of the first draft of the report on the website in Fuyang City Commission by letter, also linked to a report of the Letters, publicity time for 10 days. During the the EIA secondary publicity will be issued in the the projects surrounding area residents and enterprises Table 100 parts of the questionnaire, further public comment; during the second publicity, be construed EIA units and construction units feedback from the public, indicating The environmental impact assessment unit will reflect the views and recommendations of the environmental impact statement for the true record of the public, and the public valuable advice, it is recommended that the project construction units, design units and government environmental protection departments, the specific implementation of the engineering design, construction and operation of management.
6, the environmental impact evaluation findings
The project in line with the country's current industrial policy; production project uses more advanced technology and equipment, in line with the requirements of the National Cleaner Production; emissions of various pollutants in the project after the implementation of the evaluation of the pollution prevention measures are able to meet the emission standards and total control requirements; lighter environmental impact of the project, not to reduce the environmental quality of the existing environmental elements functional level; project running flammable, explosive, toxic substances leak risk, earnestly implement the project proposes to take security measures and evaluate the security facilities and proposed countermeasures, the risk of accidents on the surrounding environment is basically acceptable; project site in line with the overall urban planning; analysis from an environmental point of view, the construction of the project is feasible.
 
7 Contact
(1) The construction unit Contact
Contact: Mr. Mei
Contact Address: Fuyang City Fukang Road
Postal Code: 236056
Phone: 0558-2368799
Fax 0558 -2368686
E-mail: hyzgb@126.com
(2) EIA agencies Contact
Contact: Ms Lau
Address: Hefei, Fuyang Road 363
Postal Code: 230041
Phone: 0551-5852366
-5852366 Fax :0551
E-mail: hgylf@sina.com
 

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