Promote the improvement of coal gasification technology - 4.0MPa gasification technology of low-grade coal in Ji Sai Ding furnace

Coal gasification technology is the core technology
for clean and efficient conversion and utilization of coal.
The "Saiding furnace low-rank coal 4.
0MPa gasification technology" completed by Inner Mongolia Datang International Keshketeng Coal-to-Natural Gas Co.
, Ltd.
and Yili Xintian Coal Chemical Co.
, Ltd.
, together with Inner Mongolia Datang International Keshketeng Coal-to-Natural Gas Co.
, Ltd.
, breaks through the technical problems of clean and efficient gasification utilization of low-rank coal as raw material under 4.
0MPa operating pressure, improves the comprehensive energy utilization efficiency of coal-to-natural gas projects, and promotes the improvement
of the technical level of China's coal gasification field.
The project recently won the second prize of scientific and technological progress of the Chinese Chemical Industry Society
.

Sai Ding furnace crushed coal pressurized gasification technology is the main gasification technology in the field of coal gasification, which is the proprietary technology
formed by Sai Ding Company after years of research under the national "Seventh Five-Year Plan" and "Eighth Five-Year Plan" key research projects.
In 2007, Sading took the lead in China to propose the use of low-grade coal as raw material, and adopted the idea of pressurized gasification of crushed coal in Sading furnace to produce natural gas and implemented
it.
This technology can use low-quality coal for gasification, and can achieve efficient gasification of raw coal with higher moisture and ash content, and also has the unique advantages
of high thermal efficiency and low oxygen consumption.

The carbon monoxide conversion rate of the coal-to-natural gas project with Saiding furnace as the core is close to 100%, the hydrogen conversion rate is 99%, the carbon dioxide conversion rate is 98%, and the total effective conversion rate of energy is 60%~65%, which overcomes the shortcomings of the low calorific value of traditional coal-to-gas gas, low calorific value and water consumption, and methane synthetic wastewater basically does not contain harmful substances
.

Subsequently, aiming at the product requirements and raw coal characteristics of the first coal-to-natural gas project approved by the country, Saiding Company developed a crushed coal pressurized gasification process with a diameter of 3.
8 meters and a pressure of 4.
0MPa based on years of technical reserves and technological innovation, and applied it to coal chemical projects
such as Inner Mongolia Datang International Keshketeng Coal-to-Natural Gas Co.
, Ltd.
and Xinjiang Qinghua Coal-to-Natural Gas Co.
, Ltd.
Among them, the Datang Keqi coal-to-natural gas project has been tested
since it was started up in 2013.
The gasifier design is 15 open and 1 ready, the actual operation of 13 gasifiers can reach the daily output of 4 million standard cubic meters of coal-to-natural gas capacity, the sewage treatment load is 95% of the design load, the gasifier single furnace oxygen load is increased from the design value of 5232 standard cubic meters / hour to 5800 standard cubic meters / hour, the coal gasification unit to achieve long-term high-load operation
.
In December 2013, the first series of qualified natural gas produced by the Datang Keqi coal-to-natural gas project was successfully integrated into the Beijing gas pipeline network, marking the successful operation
of the first 4.
0MPa crushed coal pressurized gasifier.
In April 2021, the project passed the 72-hour operation assessment
.
The assessment results show that the device runs well, the energy saving and emission reduction effects are remarkable, and the clean and efficient utilization
of low-rank coal is realized.

After the 4.
0MPa Saiding furnace using low-grade coal as raw material was applied to the Datang Keqi coal-to-natural gas project in Inner Mongolia, it was successfully applied to the Yili Xintian coal-to-natural gas project
.
Once the project meets design targets, it can convert 6.
77 million tons of coal into 2 billion cubic meters of natural gas
per year.
In 2021, the project won the National Quality Project Gold Award
.
At present, the 4.
0MPa gasification technology of low-rank coal of Saiding furnace has been applied in many large coal chemical enterprises such as Yili Xintian Coal Chemical Co.
, Ltd.
and Xinjiang Qinghua Energy Group Co.
, Ltd.
, and the operating effect, investment and cost are better than similar technologies at home and abroad, and the economic, social and environmental benefits are remarkable
.

Sading furnace low-rank coal 4.
0MPa gasification technology is a gasification process with completely independent intellectual property rights, which has 27 patents and 1 effective proprietary technology
.
In May 2021, the technology was identified by the China Petroleum and Chemical Industry Federation and is considered to have reached the international advanced level
.
At present, Saiding has designed and contracted more than 170 sets
of crushed coal pressurized gasification technology and gasifier in China.

As a typical representative of fixed bed gasification process, the promotion and application of Sai Ding furnace has driven the upgrading of domestic manufacturing and mechanical and electrical equipment products, creating good economic and social benefits
.
Saiding also optimizes and upgrades the technology and expands its application
in biomass and other fields.
With the rapid development of coal-to-gas conversion and new urbanization, the gap of natural gas in China will become larger and larger, and the gasification technology of Sai Ding furnace can not only gasify low-rank coal, but also gasify synthetic natural gas and other chemical products with non-fossil energy as raw materials to achieve the overall goals
of carbon reduction, carbon reduction and carbon sequestration.