The coal to natural gas project in Zhihuo Keqi wil

2022-10-14
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Keqi coal to natural gas project will become Beijing's second largest "gas source"

recently, the first large-scale coal to natural gas demonstration project in China - Datang International keshketeng coal to natural gas project (hereinafter referred to as Keqi coal to natural gas project) began to supply natural gas to Beijing after routine maintenance. The project plans to supply 300million cubic meters of natural gas to Beijing this winter, which will greatly alleviate the current situation of "gas shortage" in the capital

Liu Li, Secretary of the Party committee and deputy general manager of Inner Mongolia Datang International keshketeng coal to Natural Gas Co., Ltd. (hereinafter referred to as Datang Keqi company), said that as a demonstration project, there is no experience to learn from, and all roads have to be taken by themselves, so there will be many "detours". This successful start-up marks that the Keqi coal to natural gas project has matured. While meeting the natural gas needs of the capital, it also provides valuable experience for China to optimize the energy structure and explore the goal of efficient and clean coal conversion

will become the second largest "gas source" in Beijing.

China's energy structure has always been "rich in coal, poor in oil, and less gas". The supply of natural gas is very tight, and its dependence on foreign countries is increasing. In order to ensure the safety of the national energy strategy and strengthen environmental pollution control, the state has proposed "steadily carry out coal chemical industry demonstration" and "explore new ways for efficient and clean transformation of coal and diversified development of petrochemical raw materials", and encouraged and supported the development of new coal chemical projects such as coal to natural gas and clean energy utilization projects

humidity 20% 80%

under this background, Keqi coal to natural gas project came into being. The project is located in the hinterland of Hunshandak Sandy Land in Inner Mongolia, one of the top ten sandy lands in China. In terms of administrative division, it belongs to darihan wulasumu, keshketeng banner, Chifeng City, Inner Mongolia Autonomous Region. The natural conditions here are extremely bad. The annual average temperature is only 1.6 degrees Celsius, the annual precipitation is less than 400mm, the annual frost free period is less than 100 days, and sandstorms and white hair winds are rampant all the year round. "In spring and autumn, it's windy and sandy all over the sky. In summer, it's very hot. The sun is only good in winter. Unfortunately, the cold wind is like a cat's bite." locals describe the climate here

however, the site selection of Keqi coal to natural gas project has been carefully considered. On the one hand, Inner Mongolia is rich in coal production. The raw coal of the project comes from Xilinhot Shengli East No. 2 open pit coal mine mined by Datang Group, with a reserve of 7 billion tons, which can ensure the normal production demand of the project; On the other hand, it needs a lot of water resources. The inventory of Dashimen reservoir invested and constructed by Datang International has reached 190million cubic meters, which meets the production needs of the project

The Keqi coal to natural gas project uses low-quality lignite as raw material to produce natural gas. Through advanced technology, the rich and learned low-quality lignite in Inner Mongolia is transformed into clean and efficient natural gas, realizing the efficient transformation of energy. According to reports, the Keqi coal to natural gas project is divided into three series. After the completion of the first series, the production capacity of 1.33 billion cubic meters/year will be formed; After the completion of the second series, the production capacity will reach 2.67 billion cubic meters/year; After the completion of the third series, the production capacity of 4billion cubic meters per year will be realized. After the completion of the project, it will become the second largest gas source in Beijing. As natural gas is a clean energy, the project is of great strategic significance to improve Beijing's atmospheric environment, reduce haze pollution, ensure the security of the capital's energy supply and optimize the energy structure

tortuous and extraordinary "demonstration" road

the main investors of Keqi coal to natural gas project are Datang energy and Chemical Co., Ltd., Beijing Gas Group Co., Ltd., China Datang Group Corporation and other units. After being defined as a demonstration project of coal to natural gas, the project is destined to walk a tortuous and extraordinary "demonstration" road

Liu Li believes: "There is no mature technology and process for preparing synthetic natural gas from low-quality lignite abroad. Although some commercial processes such as methanation synthesis process have been operated abroad, there are high patent fees and follow-up service fees when patent technology is involved. Therefore, everything depends on your own exploration, which can not be used for reference. The project faces many difficult factors such as new technology, new equipment, new process, new personnel and so on."

the construction of Keqi coal to natural gas project was commenced on August 30, 2009. The methanation unit was successfully started on July 28, 2012, producing qualified natural gas, which was incorporated into the Beijing gas ring on December 24, 2013 and began to supply gas to the capital Beijing

however, in the pilot production process, the gasifier jacket corrosion and thinning occurred in the unit of Keqi coal to natural gas project. In order to avoid major potential safety hazards, the vehicle was stopped for emergency repair on January 17 this year. It was put into operation again on March 25 this year, with a daily gas supply of 2.4 million standard cubic meters. As of August 10, the gas supply has been stable for 135 days, and a total of 330million standard cubic meters have been supplied to Beijing by Tianjin University, a well-known domestic university

since then, the project has undergone routine maintenance and was successfully started again on November 17 this year. It can be said that from its completion to the present, the Keqi coal to natural gas project has experienced a tortuous road, but on the other hand, it has embarked on an extraordinary "demonstration" road

it is reported that the Keqi coal to natural gas project has opened up a new path for the clean utilization of lignite in China. Lignite accounts for more than half of the coal resources in China, and no suitable utilization way was found before. The gasification characteristics of lignite have been fully demonstrated in the coal to gas demonstration, making China's 600 billion tons of lignite have a place to play

the project has found a solution to the corrosion of brown coal gasification to the system. Shortly after the demonstration of coal to gas in Keqi, it was found that the inner wall of the gasifier became thinner. After demonstration and test by industry experts, a solution was successfully found, which provided a reference for the large-scale utilization of lignite technology in China in the future

at the same time, an environmental protection solution for brown coal gasification process is proposed. The wastewater treatment of lignite pulverized coal pressurized gasification is a world-class problem. China Datang has carried out scientific and technological innovation through the national "863" plan, so that the wastewater generated in the production process can be successfully recycled and zero discharge can be achieved. By installing the largest ammonia desulfurization device in China, the Keqi project realizes desulfurization of waste gas and emission of sulfur and nitrate, conscientiously implements the social responsibility, realizes clean production of coal, and creates a green project

in addition, the project also provided theoretical and technical support for the development of coal to natural gas industry in terms of technical feasibility demonstration, energy conversion efficiency demonstration, pioneering pressurized gasifier pressure raising operation technology, proving stable catalyst performance, and localization of design, manufacturing, installation, etc., and played a good demonstration role

build a green and environment-friendly enterprise

Keqi coal to natural gas project covers an area of 418.93 hectares. Walking into Datang Keqi company, you can see that in addition to production facilities, the plant also includes employee accommodation, office area in front of the plant and service facility area. Most of the time, about 2000 employees of the company live in the factory

deputy general manager of Datang Keqi company, Secretary of Discipline Inspection Commission Li Zhongshan, chairman of the labor union, said: "the majority of young employees under the age of 35 are in the company, and the average age of employees is only 26.1 years old. The company attaches great importance to retaining talents. In addition to strengthening business training, it also attaches great importance to the personal life of employees. For this purpose, a special activity room has been built, and 'fellowship' activities will be organized every once in a while to help solve the 'personal problems' of young employees."

Li Zhongshan believes that one of the most important aspects of retaining talents is the plant environment. He laughs: "if the plant environment is bad, and everywhere is full of dust and peculiar smell, not to mention retaining young people, I'm afraid I can't even do it."

according to statistics, Keqi company has successively recruited 348 local fresh graduates in recent years, providing more than 200 other jobs. Li Zhongshan said that he supports local people to work in the company, which can solve the employment problem of the local population on the one hand; On the other hand, it can also carry out publicity for local residents. Keqi company attaches great importance to environmental protection and does a very good job

it is reported that Keqi company has always attached great importance to energy conservation and emission reduction to build a green and environmental friendly enterprise. In the early stage of production in December 2013, peculiar smell appeared in the plant for a short time, which immediately attracted the attention of the company's leaders. During the subsequent shutdown, the company rectified all the emission devices that may produce toxic and harmful gases, installed an alkali washing device at the emission port of toxic and harmful gases, and transformed it to a burning gas flare, which effectively reduced the emission of toxic and harmful gases on site and basically eliminated the odor

in order not to make the wastewater pollute the local land and water source, Keqi company will recycle the wastewater after treatment by the sewage treatment device, and at the same time, the clean rainwater from the rainwater pool outside the plant will be pumped back to the plant, which will be reused in the production system after treatment

in addition, Keqi company has established and improved the assessment system of energy conservation and emission reduction, increased the investment in energy conservation and emission reduction technology, and formulated a series of reward and punishment methods for energy conservation and emission reduction, such as "controlling the hydrogen content in natural gas", forming an effective incentive and restraint mechanism

at the same time, strengthen the management of environmental protection work, and adopt ammonia desulfurization device for sulfur recovery treatment in view of the main waste gas pollution. Ensure the production in accordance with laws and regulations, and pass the design verification of safety and environmental protection facilities, the design review of occupational disease prevention facilities, and the assessment, classification, filing and trial production plan filing of major hazard sources; Carry out environmental monitoring on the commissioning site and occupational health monitoring on the working environment, strengthen on-site pollutant emission monitoring, ensure that the emission of waste gas and solid waste meets national standards, and control the dust and poison hazards in the working environment to the minimum

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