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A device for preparing low-tar gas by combined gasification and dry distillation

A combined gasification and gas device technology, applied in the manufacture of combustible gas, gasification process, special form of dry distillation, etc., can solve the problems of unreasonable utilization of gas sensible heat, high coke and dust content of gas, and low thermal efficiency of the system , to achieve the effect suitable for large-scale production and easy to control

Inactive Publication Date: 2019-09-13
陕西首信实业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the low thermal conversion efficiency of coal, high coke and dust content in gas, unreasonable utilization of gas sensible heat, low thermal efficiency of the system, easy slagging of equipment, and inability to use the same system for catalytic conversion of coal and non-coal Due to the technical problems of catalytic conversion to prepare gas, it is necessary to design a coal gasification and carbonization cogeneration device and method that can solve the above problems

Method used

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  • A device for preparing low-tar gas by combined gasification and dry distillation

Examples

Experimental program
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Effect test

Embodiment 1

[0032]Embodiment 1: Raw coal (brown coal, anthracite or long-flame coal) moisture content is 6-10wt% after drying treatment, and the raw coal after dehydration is through pulverizing, sieves and separates the pulverized coal A that is greater than 10mm and is less than 16mm and 4- 10mm crushed coal B, mixed with a catalyst to form a mixed coal C, wherein the catalyst is an alkali metal or alkaline earth metal catalyst, the mass ratio of the crushed coal B to the catalyst is 80-200:1, and the mixed coal C passes through the fluidized bed The coal material inlet 8 of the gasification furnace 3 is sent into the fluidized bed gasifier, and the preheated gasification agent (oxygen and steam) passes through the gasification agent inlet pipe 16 and passes through the conical distribution below the coal material inlet 8 in the furnace. The pores on the plate 7 and the nozzles 19 penetrating through the conical distribution plate 7 are fed into the hearth of the fluidized bed gasifier 3...

Embodiment 2

[0033] Embodiment 2: The method for preparing low-tar fuel gas by combined gasification and dry distillation in this embodiment is the same as the method used in Embodiment 1. The difference is that the crushed coal B is directly passed through the coal material of the fluidized bed gasifier 3 The inlet 8 is sent into the fluidized bed gasifier for non-catalytic gasification, and the gasification temperature is controlled at 830-1150°C. After testing, the carbon content in the slag collection device 5 is less than 3.85wt%, the tar content of the gas that has not been treated by the synthesis gas gas processor 2-3 is greater than 1378ppm, and the tar content of the gas in the gas buffer storage tank (2-13) is less than 4.8 ppm, the dust content of solid particles is less than 7.8mg / Nm 3 , the coal processing capacity is greater than 180 tons / d, the thermal efficiency of the system is greater than 82%, and the system has not shut down due to tar blocking the filter element for 2...

Embodiment 3

[0034] Example 3: The method for preparing low-tar fuel gas by combined gasification and carbonization in this example is different from the method used in Example 1. The difference is that the gas-solid separator 2- 2 External, that is, connected to the top gas outlet of the fluidized bed retort furnace through a pipeline, the length of the connecting pipeline is 0.3-0.6m; other process parameters are the same as in Example 1, and the system has been running continuously for 13 months due to tar blockage of the filter element. .

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Abstract

The invention relates to an apparatus for preparing low-tar fuel gas through combining gasification and dry distillation. The apparatus comprises a fluidized bed gasification furnace (3), a cyclone separator (4), a slag collecting device (5), a gasifying agent supply system, microwave heating devices (12), second plasma torches (17), a fluidized bed dry distillation furnace (2-1), a built-in gas-solid separator (2-2), a syngas and coal gas processor (2-3) and first plasma torches (2-11). The apparatus is suitable for preparing coal gas through catalytic conversion and non-catalytic conversion of coal, and has the advantages of high thermal efficiency, easy large-scale formation, long-term stable running, high coal conversion rate, low coke and dust content of fuel gas, and efficient sensible heat recovery of the syngas.

Description

technical field [0001] The invention relates to the application field of coal chemical technology, in particular to a combined gasification and carbonization device for preparing low-tar gas. Background technique [0002] Coal chemical industry uses coal as raw material, prepares solid fuel through physical processing, and converts coal into gas fuel, liquid fuel, coke and chemicals through chemical processing, including gasification, liquefaction, coking and other utilization routes of coal. Coal pyrolysis is an extremely important intermediate process of coal processing and conversion, such as gasification, liquefaction, coking and other processes. Under anaerobic or anoxic conditions, partial gasification and liquefaction of coal can be realized to produce gas and tar. [0003] Coal gasification is mainly divided into fixed bed gasification, fluidized bed gasification and entrained bed gasification. Fluidized bed coal gasification technology has become the main direction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/04C10J3/48C10J3/50C10J3/80C10J3/82C10J3/84
CPCC10B53/04C10J3/48C10J3/50C10J3/80C10J3/82C10J3/84C10J2300/09C10J2300/093C10J2300/095C10J2300/0959C10J2300/0976C10J2300/123C10J2300/1603Y02P20/10Y02P20/52
Inventor 曹俊刚
Owner 陕西首信实业有限公司
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