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A kind of fluidized bed gasification method of sludge pulverized coal

A technology of fluidized bed gasification and pulverized coal, which is applied in the field of gasification, can solve the problems of weak modification ability, poor dehydration effect, and difficult particle crushing, and achieve the effects of rapid disposal, improved conversion rate, and low heat energy loss

Active Publication Date: 2017-05-03
任相坤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since slag is generally rock-like or glass-like, with high hardness and difficult particle crushing, if it is directly used for sludge modification or dehydration treatment, there will be problems of weak modification ability and poor dehydration effect. Therefore, in the prior art, There is no report on the direct use of slag for sludge modification and dehydration

Method used

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  • A kind of fluidized bed gasification method of sludge pulverized coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] To 10kg of sludge with a water content of 70wt%, add 85kg of lignite and 5kg of coal-fired furnace slag with a particle size of 40mm, mix evenly, pulverize and granulate to obtain mixture particles with a particle size of less than 10mm, and naturally air-dry the mixture particles to Moisture content 2 and CO crude gas, wherein the addition amount of the mixture particles is 1000kg / h, and the addition amount of the oxygen is 0.57Nm per kilogram of the mixture particles 3 , the added amount of the water vapor is expressed as per Nm 3 Oxygen meter, 0.17kg.

Embodiment 2

[0036] Add 75kg of anthracite and 10kg of coal-fired furnace slag with a particle size of 3mm to 15kg of sludge with a moisture content of 75wt%, mix well, pulverize and granulate to obtain mixture particles with a particle size of 3 to 10mm, and place the mixture particles in Dry at 140°C for 0.5h until the water content is less than 5wt%; use oxygen and water vapor as the gasification agent, send the dried mixture particles and the gasification agent into the fluidized bed gasification furnace in reverse, at a pressure of 0.098 MPa, at a temperature of 1000°C, pyrolysis and gasification reactions occur to generate rich H 2 and CO crude gas, wherein the added amount of the mixture particles is 1000 kg / h, and the added amount of the oxygen is 0.57Nm per kg of the mixture particles 3 , the added amount of the water vapor is expressed as per Nm 3 Oxygen meter, 0.17kg.

Embodiment 3

[0038] Add 60kg of bituminous coal, 10kg of coal gasifier slag with a particle size of 7mm and 10kg of metallurgical slag with a particle size of 3mm to 20kg of sludge with a moisture content of 80wt%, mix evenly, crush and granulate, and obtain a particle size of 3-10mm. Mixture particles, dry the mixture particles at 20°C for 48 hours until the water content is 2 and CO crude gas, wherein the added amount of the mixture particles is 1000 kg / h, and the added amount of the oxygen is 0.57Nm per kg of the mixture particles 3 , the added amount of the water vapor is expressed as per Nm 3 Oxygen meter, 0.17kg.

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Abstract

The invention provides a fluidized bed gasification method of sludge and pulverized coal, belonging to the field of gasification. The method comprises the following steps: (1) adding coal and slag into the sludge containing water, uniformly mixing and prilling to obtain mixture granules, wherein the mass ratio of the sludge containing water to the coal to the slag is (10-30):(40-85):(5-30); (2) drying the mixture granules obtained in the step (1); and (3) reversely sending the mixture granules dried in the step (2) and a gasification agent into a fluidized bed gasification furnace to generate a pyrolysis gasification reaction at the temperature of 900-1400 DEG C, so as to generate crude gas rich in H2 and CO. The method provided by the invention is adopted for gasifying the fluidized bed of the sludge and the pulverized coal, has the advantages of simple technology, low heat energy loss in the gasification process and high gasification efficiency, and realizes high-efficiency and quick disposition and resource utilization of the sludge.

Description

technical field [0001] The invention relates to a gasification method for co-gasifying sludge and coal, in particular to a gasification process in which sludge and coal are mixed and gasified in a fluidized bed to generate combustible gas, and belongs to the field of gasification. Background technique [0002] The output of municipal sludge is huge and its composition is complex. How to dispose and utilize municipal sludge has become a concern of people. For a long time, people have always regarded the sludge disposal method of "reduction, stabilization, and harmlessness" as the ultimate goal. Under this principle, people give priority to choosing more economical technologies to dispose of sludge. At present, the treatment methods of municipal sludge mainly include landfill, use as agricultural fertilizer, and incineration. [0003] Sanitary landfill treatment of sludge has the advantages of simple operation and low investment. However, landfill sludge needs to occupy a la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/46
Inventor 任相坤
Owner 任相坤