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A coupled gasification method of coal and gaseous hydrocarbons by adjusting the hydrogen-carbon ratio of synthesis gas

A technology of gaseous hydrocarbons and gas hydrogen, which is applied in the field of coal gasification, can solve the problems of high prices of natural gas, etc., and achieve the effects of simple method, reduced equipment investment, and reduced device operating costs

Active Publication Date: 2020-12-25
THE NORTHWEST RES INST OF CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] my country is relatively rich in coal resources, but most of the natural gas resources are distributed in the Tarim Basin, Shaanxi-Gansu-Ningxia, Inner Mongolia, Qaidam Basin and other central and western regions with relatively weak industrial bases, and the transportation of natural gas through the pipeline network causes the price of natural gas to be high

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  • A coupled gasification method of coal and gaseous hydrocarbons by adjusting the hydrogen-carbon ratio of synthesis gas

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Embodiment 1

[0033] The coupled gasification method in this embodiment is: feed coal, natural gas and oxygen together from the multi-channel gasification nozzles on the top of the gasifier, and carry out the gasification reaction at a temperature of 1150°C and a pressure of 3.0 MPa to obtain synthesis gas and molten hot slag; the multi-channel gasification nozzle on the top of the gasifier is provided with a gaseous hydrocarbon conversion channel, and the ratio of the furnace length to the furnace diameter of the gasifier is 3:1. Make a mass concentration of 60% coal-water slurry, the flow of coal-water slurry in the co-feeding process is 38007.58kg / h (equivalent to dry coal flow is 22804.55kg / h), the flow of natural gas is 19003.79Nm 3 / h, the oxygen flow rate used in the coal-water slurry gasification process is 16012.64Nm 3 / h, the flow rate of oxygen used in the natural gas gasification process is 14252.84Nm 3 / h, the amount of synthesis gas generated is 103657.31Nm 3 / h, the main co...

Embodiment 2

[0045] The coupled gasification method in this embodiment is: feed coal, natural gas and oxygen together from the multi-channel gasification nozzles on the top of the gasifier, and carry out the gasification reaction at a temperature of 1150°C and a pressure of 3.0 MPa to obtain synthesis gas and molten hot slag; the multi-channel gasification nozzle on the top of the gasifier is provided with a gaseous hydrocarbon conversion channel, and the ratio of the furnace length to the furnace diameter of the gasifier is 3:1. Make the coal-water slurry that mass concentration is 60%, the flow rate of coal-water slurry in the described co-feeding process is 38007.58kg / h (equivalent dry coal flow rate is 22804.55kg / h), the flow rate of natural gas is 12002.39Nm 3 / h, the oxygen flow rate used in the coal-water slurry gasification process is 16012.64Nm 3 / h, the oxygen flow rate for the natural gas gasification process is 7201.43Nm 3 / h, the amount of synthesis gas generated is 85167.06N...

Embodiment 3

[0051] The coupled gasification method in this embodiment is: feed coal, natural gas and oxygen together from the multi-channel gasification nozzles on the top of the gasifier, and carry out the gasification reaction at a temperature of 1150°C and a pressure of 3.0 MPa to obtain synthesis gas and molten hot slag; the multi-channel gasification nozzle on the top of the gasifier is provided with a gaseous hydrocarbon conversion channel, and the ratio of the furnace length to the furnace diameter of the gasifier is 3:1. Make a mass concentration of 60% coal-water slurry, the flow of coal-water slurry in the co-feeding process is 38007.58kg / h (equivalent to dry coal flow is 22804.55kg / h), the flow of natural gas is 9501.67Nm 3 / h, the oxygen flow rate used in the coal-water slurry gasification process is 16012.64Nm 3 / h, the oxygen flow rate for the natural gas gasification process is 5225.92Nm 3 / h, the amount of synthesis gas produced is 78565.16Nm 3 / h, the main components of...

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Abstract

The invention discloses a coal and gaseous hydrocarbon coupled gasification method capable of regulating a hydrogen-carbon ratio of a synthetic gas. The method is performed by two modes: the mode A: simultaneously feeding coal, gaseous hydrocarbon and oxygen from a multi-channel gasification nozzle at the top of a gasifier and performing a gasification reaction; or the mode B: feeding a mixed material of the coal and the oxygen from the multi-channel gasification nozzle at the top of the gasifier, and feeding a mixed material of the gaseous hydrocarbon and the oxygen from the multi-channel gasification nozzle at the side face of the gasifier, and simultaneously performing the gasification reaction. The method is capable of simultaneously introducing the coal, the gaseous hydrocarbon and the oxygen into the gasifier for performing the coupled gasification reaction, and reinforcing a fogging degree of the material, thereby forming a more suitable flow field in the gasifier, prolonging standing time of the material, and improving a degree of the gasification reaction, through controlling an addition proportion of the coal and the gaseous hydrocarbon on the other hand, thereby effectively regulating the hydrogen-carbon ratio of the product synthetic gas, realizing carbon-hydrogen complementation and energy complementation, saving system energy consumption, and effectively reducingrunning cost of a device.

Description

technical field [0001] The invention belongs to the technical field of coal gasification, and in particular relates to a coupled gasification method of coal and gaseous hydrocarbons for adjusting the hydrogen-carbon ratio of synthesis gas. Background technique [0002] my country is relatively rich in coal resources, but most of the natural gas resources are distributed in the Tarim Basin, Shaanxi-Gansu-Ningxia, Inner Mongolia, Qaidam Basin and other central and western regions with weak industrial foundations, and the price of natural gas is relatively high due to pipeline network transmission. The raw materials of carbon-chemical industry are coal, natural gas, coal bed methane, coke oven gas, oil field gas and other gas, liquid and solid materials containing hydrocarbons that can be converted to produce synthesis gas. Among them, the synthesis gas produced by a single coal gasification process has a relatively low hydrogen-carbon ratio. When it is used for methanol synthe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/46C10J3/72
CPCC10J3/46C10J3/72C10J2300/0936C10J2300/0959C10J2300/0989
Inventor 邹涛林益安刘军杜彦学赵蒙张瑜曾梅徐红东徐宏伟贺根良韦孙昌
Owner THE NORTHWEST RES INST OF CHEM IND