Comprehensive utilization technology used for production of gasoline and liquefied natural gas through methanol synthesis of crushed coal pressure gasification synthetic gas, and used for tar depth processing

A technology for the synthesis of liquefied natural gas and methanol, which is applied in the fields of refining tar through chemical methods, hydroprocessing technology, petroleum industry, etc., and can solve problems such as difficult fuel oil, affecting economic benefits, and poor quality

Active Publication Date: 2015-11-18
SEDIN ENG +1
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  • Claims
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Problems solved by technology

However, at present, there is a serious excess capacity of methanol. If it is converted into methanol, the economic benefit is poor. At the same time, the tar produced by hydrogenation and...

Method used

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  • Comprehensive utilization technology used for production of gasoline and liquefied natural gas through methanol synthesis of crushed coal pressure gasification synthetic gas, and used for tar depth processing
  • Comprehensive utilization technology used for production of gasoline and liquefied natural gas through methanol synthesis of crushed coal pressure gasification synthetic gas, and used for tar depth processing
  • Comprehensive utilization technology used for production of gasoline and liquefied natural gas through methanol synthesis of crushed coal pressure gasification synthetic gas, and used for tar depth processing

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Embodiment 1

[0061] (1) Raw material lignite is steamed with water vapor: carbon dioxide: oxygen = 8kg: 2m 3 : 1m 3 It is a gasification agent, and it is converted into H through pressurized gasification of crushed coal under the condition of 1400°C and gasification pressure of 4MPa. 2 37%, CO20%, CO 2 33%, CH 4 9.9%, N 20.1% of synthesis gas and tar by-products, 25% of the total volume of synthesis gas in the generated synthesis gas, is produced on the QCS-04 sulfur-resistant shift catalyst produced by Keli Chemical Company of Qilu Petrochemical Research Institute, at a reaction temperature of 460 ° C , the reaction pressure is 6MPa and the gas space velocity is 10000h -1 After the water-vapor shift reaction is carried out under certain conditions, it is mixed with 75% of the side stream syngas into the gas cooling system 3, the condensed oily waste water is sent to the gas-water separation system 15, and the syngas enters the low-temperature methanol washing system 4 , under the con...

Embodiment 2

[0068] In this embodiment, long-flame coal is used as the raw material, and the multi-component gasification agent is composed of water vapor: carbon dioxide: oxygen = 6kg: 3m 3 : 1m 3 , under the condition of 1300℃ and gasification pressure of 4.5MPa, pressurized gasification of pulverized coal is carried out, and the composition of synthesis gas is H 2 40%, CO17%, CO 2 33%, CH 4 9.6%, N 2 0.4%; the generated synthesis gas accounts for 28% of the total volume of the synthesis gas on the QCS-04 sulfur-resistant shift catalyst produced by Keli Chemical Company of Qilu Petrochemical Research Institute. The reaction temperature is 400 ° C, the reaction pressure is 5 MPa and Gas space velocity is 8000h -1 After carrying out the water-vapor shift reaction under certain conditions, 72% of them do not undergo the shift reaction; the low-temperature methanol washing conditions are temperature-50°C and operating pressure 3.8MPa; 6% of the carbon dioxide gas volume removed enters th...

Embodiment 3

[0071] In this embodiment, long-flame coal is used as raw material, and the multi-component gasification agent is composed of water vapor: carbon dioxide: oxygen = 4kg: 4m 3 : 1m 3 , under the condition of 1200℃ and gasification pressure of 5MPa, pressurized gasification of pulverized coal is carried out, and the composition of syngas is H 240%, CO19.9%, CO 2 28%, CH 4 12%, N 2 0.1%; the gas that accounts for 30% of the total volume of the synthesis gas in the generated synthesis gas is used on the QDB-03 sulfur-resistant shift catalyst produced by Qingdao Lianxin Chemical Industry Co., Ltd., at a reaction temperature of 300 ° C, a reaction pressure of 4 MPa and gas Airspeed is 6000h -1 After carrying out the water-vapor shift reaction under certain conditions, and 70% without the shift reaction; the low-temperature methanol washing conditions are temperature-40°C and operating pressure 3.5MPa; 5% of the carbon dioxide gas volume removed enters the synthesis gas compressor...

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Abstract

A comprehensive utilization technology used for production of gasoline and liquefied natural gas through methanol synthesis of crushed coal pressure gasification synthetic gas, and used for tar depth processing comprises the following steps: crushed coal pressure gasification synthetic gas undergoes hydrogen-carbon ratio transformation adjustment, undergoes low temperature methanol washing to remove carbon dioxide and hydrogen sulfide and other acidic gases, and undergoes methane depth cold separation to remove methane gas and produce LNG as a byproduct, parts of the obtained gas undergo pressure swing adsorption to remove hydrogen, stripping gas and the gas not subject to the pressure swing adsorption are mixed and undergo methanol synthesis to form gasoline, and hydrogen is used in hydrogenation and cracking of tar, heavy oil and naphtha which are byproducts of the rushed coal pressure gasification in order to prepare gasoline, diesel oil and heavy oil products. The technology has the advantages of high utilization rate, simplicity, reasonable product structure and small environmental pollution.

Description

technical field [0001] The invention belongs to a comprehensive utilization process for pressurized gasification of crushed coal to synthesize gasoline through methanol, co-production of liquefied natural gas and deep processing of tar. technical background [0002] my country has a coal-rich, oil-poor and gas-poor energy structure, in which oil and natural gas resources are seriously in short supply, far below the world average. In recent years, with the steady and rapid development of my country's economy, the gap between domestic oil and gas supply and demand has increased year by year, posing great challenges to national energy security, economic security and social security. The successful development and industrial application of coal-to-oil and coal-to-natural gas technologies is an important way to realize the clean and efficient conversion of coal resources, alleviate the contradiction between supply and demand of oil and gas, and ensure national security. [0003]...

Claims

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Application Information

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IPC IPC(8): C10L3/08C10G3/00C10G69/06C10J3/00C10C1/20
CPCY02E50/30Y02P30/20
Inventor 范辉马英民崔晓曦王军亭王贵马国强张庆庚李晓史郭晓时建敏刘建卫王文婷
Owner SEDIN ENG
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