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System and method for pyrolysis combined gasification of pulverized coal

A combined gasification and pulverized coal technology, which is applied in the direction of granular/powdered fuel gasification, production of combustible gas, special form of dry distillation, etc., can solve the problems of low heat utilization rate and incomplete gasification, and achieve convenient control and low cost Low, efficient effect

Active Publication Date: 2014-07-16
唐山雷浩能源技术装备有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a system and method of pulverized coal pyrolysis combined gasification, which can effectively improve the heat utilization efficiency and produce high-quality retort gas, high calorific value gas and tar respectively, so as to solve the current problem of pulverized coal Problems such as low heat utilization rate and incomplete gasification in upgrading technology

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  • System and method for pyrolysis combined gasification of pulverized coal

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Embodiment 1

[0088] This embodiment provides a pyrolysis combined gasification method for comprehensive utilization of pulverized coal, using the system of the present invention, which specifically includes the following steps:

[0089] The pulverized coal passes through the vertical retort furnace and is heated and retorted by circulating retort gas at a temperature of 525°C in the absence of air. After passing through the cyclone dust collector, heat exchanger, and electric tar catcher in turn, part of the product is supplied as an external product, and part of it is sent to the vertical carbonization furnace after being heated as a heat carrier;

[0090] In the fluidized gasification furnace, the pulverized coal and the high-temperature circulating ash from the fluidized combustion furnace are mixed and react with water vapor and air at a furnace temperature of 900°C to generate high calorific value gas, which passes through the cyclone dust collector in turn , heat exchanger, electric ...

Embodiment 2

[0092] This embodiment provides a pyrolysis combined gasification method for comprehensive utilization of pulverized coal, using the system of the present invention, which specifically includes the following steps:

[0093] The pulverized coal passes through the vertical retort furnace and is heated and retorted by circulating retort gas at a temperature of 550°C in the absence of air. After passing through the cyclone dust collector, heat exchanger, and electric tar catcher in turn, part of the product is supplied as an external product, and part of it is sent to the vertical carbonization furnace after being heated as a heat carrier;

[0094] In the fluidized gasification furnace, the pulverized coal and the high-temperature circulating ash from the fluidized combustion furnace are mixed and react with water vapor and air at a furnace temperature of 925°C to generate high calorific value gas, which passes through the cyclone dust collector in turn , heat exchangers, electric...

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Abstract

The invention discloses a system and a method for pyrolysis combined gasification of pulverized coal and belongs to the technical field of pulverized coal utilization. The system comprises a retorting gas generation subsystem, a charger and a gas generation subsystem, wherein the retorting gas generation subsystem is provided with a discharge hole, a steam outlet, a dust removal outlet, a hot smoke inlet and a retorting gas outlet; the gas generation subsystem is provided with a feeding hole, a gas inlet, a dust supply opening, a hot gas outlet and a gas outlet; the discharge hole of the retorting gas generation subsystem is connected with the feeding hole of the gas generation subsystem through the charger; the steam outlet of the retorting gas generation subsystem is connected with the gas inlet of the gas generation subsystem; the dust removal outlet of the retorting gas generation subsystem is connected with the dust supply opening of the gas generation subsystem; and the hot gas outlet of the gas generation subsystem is connected with the hot smoke inlet of the retorting gas generation subsystem. The system is capable of recycling resources, thereby realizing comprehensive utilization of pulverized coal and producing high-quality retorting gas and tar and high heating value gas; as a result, the system is high in thermal efficiency and high in resource utilization rate.

Description

technical field [0001] The invention relates to the field of pulverized coal pyrolysis and gasification utilization, in particular to a pulverized coal pyrolysis combined gasification system and method for comprehensive utilization of pulverized coal. Background technique [0002] my country is rich in low-rank coal resources such as lignite, which has the advantages of thick coal seam, shallow burial, low production cost, and easy large-scale mining. Moreover, lignite coal is loose and difficult to form lumps. However, lignite has high moisture content and low calorific value, so it is not suitable for long-distance transportation, and its economic value is not high. During the mining process of coal mines, a lot of powder ore will be produced, and the powder ore is difficult to use, and its value is lower than that of lump materials. The existing pulverized coal pyrolysis upgrading methods are mostly external heating methods with low efficiency; based on this, internal he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/54C10J3/60C10J3/84C10B53/04
Inventor 雷晓平夏德宏王旭佳郭梁赵栗
Owner 唐山雷浩能源技术装备有限公司