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Coal gasification process for methane preparation by two stage gasification stove

A technology of gasification furnace and coal gasification, which is applied in the direction of gasification process, hydrocarbon production from carbon oxides, granular/powdered fuel gasification, etc. It can solve the problems of increasing system energy consumption, equipment size, and large circulation volume.

Active Publication Date: 2011-06-01
ENN SCI & TECH DEV
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  • Abstract
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AI Technical Summary

Problems solved by technology

The disadvantage of this method is the required CO and H 2 The circulation volume is relatively large, which increases the system energy consumption and equipment size

Method used

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  • Coal gasification process for methane preparation by two stage gasification stove
  • Coal gasification process for methane preparation by two stage gasification stove
  • Coal gasification process for methane preparation by two stage gasification stove

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Embodiment Construction

[0019] The process of the invention is carried out in two-stage gasifiers connected in series. Combine below figure 1 The present invention is explained in detail.

[0020] In step a of the present invention, coal and oxygen-containing gas are reacted in a primary gasifier to generate gas containing CO, CO 2 、H 2 、H 2 O gasification gas products. Wherein the coal can be passed into the primary gasifier in the form of coal-water slurry or dry coal powder, and the feed equipment is conventional slurry feed equipment in the field such as high-pressure coal-water slurry delivery pump (such as diaphragm pump) and coal-water Slurry nozzles or solid feeding equipment such as lock hopper feeding and pressurized blowing equipment. At the same time, oxygen-containing gas is fed into the primary gasifier, and the oxygen-containing gas can be air, oxygen-enriched air or pure oxygen. Coal and oxygen undergo a gasification reaction at a temperature of 900-1600°C and a pressure of 20-7...

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Abstract

The invention relates to a coal gasification process for methane preparation, including the following steps that: a. coal is reacted with oxygen containing gas in a first stage gasification stove to produce coal-gasified gas products containing CO, CO2, H2 and H2O; b. a coolant is fed to the coal-gasified gas products for cooling, and a first stage gas product is obtained; and c. the first stage gas product is fed to a second stage gasification stove and reacted with coal and a catalyst to form a second stage gas product containing methane.

Description

field of invention [0001] The invention relates to a method for producing methane by gasification of coal, more specifically, the invention relates to a method for producing methane by gasification of coal in a two-stage gasifier. Background technique [0002] With the depletion of the world's oil resources and the demand for environmental protection in the sustainable development of human beings, the clean coal utilization technology represented by coal gasification will play an irreplaceable role in the future fossil energy. In particular, my country is rich in coal and poor in oil, and its coal storage ranks third in the world, and the geographical distribution of coal resources is uneven. The rational development and utilization of coal gasification technology has long-term strategic significance for ensuring China's energy security and economic development. Compared with existing natural gas, synthetic methane has attracted more and more industrialization attention due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C9/04C07C1/04C10J3/54
CPCC10L3/08C10J2300/1662C10J2300/0943C10J2300/0986C10J2300/0959C10J2300/0966C10J3/721C10J3/463C10J2300/093C10J2300/0969C10J3/466C10J2300/0976
Inventor 刘兵谷俊杰叶明星赵晓郭启峰
Owner ENN SCI & TECH DEV
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