CN101063051A

CN101063051A - Powder coal grading cleaning multigang utilization system

Info

Publication number: CN101063051A
Application number: CN 200610076462
Authority: CN
Inventors: 董久明
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-04-26
Filing date: 2006-04-26
Publication date: 2007-10-31

Abstract

The invention discloses a dust coal grading clean multigang utilizing technology, which comprises the following steps: processing and sorting raw coal through raw coal processing device; getting a finite grain size ash coal; entering into drying bed on the upper of shell; heating and drying through coal gas of pyrolytic bed; removing water; entering into pyrolytic bed; proceeding pyrolytic reaction; generating rough coal gas; separating through cyclone separator; returning solid; entering the gas into coal chemical industry; processing; purifying; separating and purifying with split system; extracting hydrocarbons chemical product with high added value; entering the ash coal into circulating fluidized bed boiler; burning evenly; leading the steam into electro thermal co-providing system. This invention possesses stable craft and low operating cost, which is a best technique in now power-making and related professional.

Description

Fine coal grading cleaning multiple utilizes technology

Technical field:

The present invention relates to a kind of pulverized coal pyrolysis device, particularly a kind of fine coal grading cleaning multiple utilizes technology.

Background technology:

Existing fine coal is used, particularly at power field, generally all directly fine coal is sent into the boiler combustion generating, and the hydro carbons Chemicals of high added value do not reclaim in the fine coal, it itself is exactly waste to resource that but the high added value hydrocarbon products of pyrolysis separation and Extraction in the coal is burnt, and next makes the sulphur, nitrogen of chemical combination attitude in the coal under the oxidizing fire state, the generation acidic oxide, serious environment pollution, and then make it be difficult to control more at aspects such as environmental purifications.

Summary of the invention:

Purpose of the present invention just is to overcome weak point of the prior art, provide a kind of technology reliable, the operation working cost is low, the resource of coal can be made full use of, can extract the high added value hydrocarbon products cheapness in the coal by multistage pyrolysis, simultaneously primary pollution source sulphur and nitrogen in the coal are administered in the pyrolysis source, and be recovered as Chemicals, a kind of fine coal grading cleaning multiple that the highest economic benefit and clean environmental protection social benefit are combined closely utilizes technology.

The object of the present invention is achieved like this, it comprises: Coal Chemical Industry processing, purify, separation system, the dry thermal cracking device, circular fluid bed, cogeneration system, the dry thermal cracking device is by housing, drying bed, the low temperature pyrogenation bed, in the warm bed of separating, the combustion chamber is formed, it is by dry thermal cracking, burning, the gas sweetening operation constitutes, raw coal enters the drying bed on housing top with the fine coal of certain particle size after raw coal processing unit (plant) processing screening, after the coal gas heat drying that provides by the pyrolysis bed is removed moisture, and be heated to and enter into the low temperature pyrogenation bed about 150 ℃-200 ℃ and carry out pyrolytic reaction, pyrolysis temperature is about 300 ℃-500 ℃, warm separating carried out pyrolytic reaction once more in entering then in the bed, pyrolysis temperature is about 600 ℃-850 ℃, the raw gas of output separates through cyclonic separator, solid returns, gas enters Coal Chemical Industry processing, purify, separation system is carried out isolation of purified, to extract the hydro carbons Chemicals of high added value, combustion gas, air enters during combustion chambers burn is by mixing tank, low pyrolysis bed provides thermal source, the coal gas of self output is originated as combustion gas, fugitive constituent is controlled under the pyrolytic working temperature through valve less than 10% semi-coke powder and enters burning in circulating fluid bed boiler after the pyrolysis, steam is sent into cogeneration system, drying bed, the low temperature pyrogenation bed, in warm inside of separating berth in the dry thermal cracking device case, in warm top of separating berth in the combustion chamber, in warm separate the bed top the low temperature pyrogenation bed is housed, drying bed is positioned at the top of low temperature pyrogenation bed, drying bed, the low temperature pyrogenation bed, in warm separating air distribution plate is housed on the bed, cyclonic separator is equipped with on the top of drying bed, air is housed on the combustion chamber, fuel gas mixer, drying bed, the low temperature pyrogenation bed, in warm separating between the bed be equipped with communicating pipe, on the housing, the bottom is respectively equipped with the fine coal inlet, the fine coal outlet.

Purpose of the present invention also can realize that communicating pipe is provided with valve by following technical measures, and gas exit is equipped with on the top of housing, and fugitive constituent is delivered directly to the circular fluid bed internal combustion less than 10% semi-coke powder under hot.。

Compared to existing technology, it is reliable that the present invention has technology, and the operation working cost is low, can extract the high added value hydrocarbon products cheapness in the coal by multistage pyrolysis, the resource of coal can be made full use of, advantages such as the highest economic benefit and clean environmental protection social benefit are arranged.

Description of drawings:

Fig. 1 is a structural representation of the present invention

Embodiment:

Below in conjunction with drawings and Examples in detail the present invention is described in detail, Coal Chemical Industry processing, purify, separation system 9, dry thermal cracking device 1, circular fluid bed 17, cogeneration system 18, dry thermal cracking device 1 is by drying bed 7, low temperature pyrogenation bed 4, in warm separate the bed 3, combustion chamber 16 is formed, it is by dry thermal cracking, burning, the gas sweetening operation constitutes, raw coal enters the drying bed 7 on dry thermal cracking device 1 top with the fine coal of certain particle size after raw coal processing unit (plant) processing screening, after the coal gas heat drying that provides by pyrolysis bed 4 is removed moisture, and be heated to and enter into low temperature pyrogenation bed 4 about 150 ℃-200 ℃ and carry out pyrolytic reaction, pyrolysis temperature is about 300 ℃-500 ℃, warm separating in the bed 3 carried out pyrolytic reaction once more in entering then, pyrolysis temperature is about 600 ℃-850 ℃, the raw gas of output separates through cyclonic separator 8, solid returns, gas enters Coal Chemical Industry processing, purify, separation system 9 is carried out isolation of purified, to extract the hydro carbons Chemicals of high added value, combustion gas, air enters during combustion chamber 16 burning is by mixing tank 2,

low pyrolysis bed

3,4 provide thermal source, the coal gas of self output is originated as combustion gas, fugitive constituent is controlled at through valve 15 less than 10% semi-coke powder and enters circular fluid bed 17 burnings under the pyrolytic working temperature after the pyrolysis, steam is sent into cogeneration system 18, drying bed 7, low temperature pyrogenation bed 4, in warmly separate the inside that bed 3 is positioned at dry thermal cracking device 1, in warmly separate the top that bed 3 is positioned at combustion chamber 16, in warm bed 3 the top of separating low temperature pyrogenation bed 4 is housed, drying bed 7 is positioned at the top of low temperature pyrogenation bed 4, drying bed 7, low temperature pyrogenation bed 4, in the warm bed of separating air distribution plate is housed on 3, cyclonic separator 8 is equipped with on the top of drying bed 7, on the combustion chamber 16 air is housed, fuel gas mixer 2, drying bed 7, low temperature pyrogenation bed 4, in the warm bed of separating be housed between 3 communicating

pipe

12,6, on the dry thermal cracking device 1, the bottom is respectively equipped with fine coal inlet 11, fine coal outlet 14.

Principle of work of the present invention is, raw coal enters the drying bed 7 on dry thermal cracking device 1 top by fine coal inlet 11 with the fine coal of certain particle size after raw coal processing unit (plant) processing screening, after the coal gas heat drying that pyrolysis bed 4 by dry thermal cracking device 1 provides is removed moisture, and be heated to about 150 ℃-200 ℃ by deadweight and carry out pyrolytic reaction by entering into low temperature pyrogenation bed 4 communicating pipe 6, pyrolysis temperature is about 300 ℃-500 ℃, warm separating in the bed 3 carried out pyrolytic reaction once more in entering by communicating pipe 12 by deadweight then, pyrolysis temperature is about 600 ℃-850 ℃, and by valve 5, the lowering speed and the flow of 13 control fine coal, air, combustion gas enters combustion chamber 16 internal combustion by mixing tank 2 and provides thermal source for pyrolysis, pyrolysis temperature is at the pyrolysis bed 4 of dry thermal cracking device 1 inside, progressively successively decrease from bottom to top on the drying bed 7, pass through cyclonic separator 8 separation on dry thermal cracking device 1 top by the raw gas of dry thermal cracking device 1 output, solid returns, gas enters Coal Chemical Industry processing, purify, separation system 9 is carried out isolation of purified, to extract the hydro carbons Chemicals (sulphur of high added value, nitrogen, tar, use coal gas etc.), fugitive constituent is less than 10% semi-coke powder after reaction for some time pyrolysis, the fine coal outlet 14 of drying pyrolysis installation 1 bottom, under the control of valve 15, under the pyrolytic working temperature, the hot circular fluid bed 17 that enters fully burns, steam is sent into cogeneration system 18, the slag that circular fluid bed 17 is discharged can be used as building materials and uses, and the low NOx that produces and the flue gas of sulfide, well below discharging standards, can purify emptying, thermal insulation layer 19 is arranged in the dry thermal cracking device 1.

The present invention has made full use of the active good characteristics of destructive distillation pyrolytic coke powder under the fine coal medium and low temperature, utilize reliable fluidized-bed to carry out multistage pyrolysis, and under lower working cost, extract the hydro carbons Chemicals (sulphur of high added value, nitrogen, tar, use coal gas etc.), the coal gas of output can be used as the combustion gas source of combustion chamber 16 again, and the pyrolysis coke breeze provides high quality raw material for generating, the resource of coal can be fully used, technology of the present invention is reliable, the operation working cost is low, the resource of coal can being made full use of, the highest economic benefit and clean environmental protection social benefit are arranged, is the best-of-breed technology that existing generating and relevant industries are badly in need of utilization and extention.

Claims

1, a kind of fine coal grading cleaning multiple utilizes technology, it comprises: Coal Chemical Industry processing, purify, separation system, the dry thermal cracking device, circular fluid bed, cogeneration system, it is characterized in that: the dry thermal cracking device is by housing, drying bed, the low temperature pyrogenation bed, in the warm bed of separating, the combustion chamber is formed, it is by dry thermal cracking, burning, the gas sweetening operation constitutes, raw coal enters the drying bed on housing top with the fine coal of certain particle size after raw coal processing unit (plant) processing screening, after the coal gas heat drying that provides by the pyrolysis bed is removed moisture, and be heated to and enter into the low temperature pyrogenation bed about 150 ℃-200 ℃ and carry out pyrolytic reaction, pyrolysis temperature is about 300 ℃-500 ℃, warm separating carried out pyrolytic reaction once more in entering then in the bed, pyrolysis temperature is about 600 ℃-850 ℃, the raw gas of output separates through cyclonic separator, solid returns, gas enters Coal Chemical Industry processing, purify, separation system is carried out isolation of purified, to extract the hydro carbons Chemicals of high added value, combustion gas, air enters during combustion chambers burn is by mixing tank, low pyrolysis bed provides thermal source, the coal gas of self output is originated as combustion gas, fugitive constituent is controlled under the pyrolytic working temperature through valve less than 10% semi-coke powder and enters burning in circulating fluid bed boiler after the pyrolysis, steam is sent into cogeneration system, drying bed, the low temperature pyrogenation bed, in warm inside of separating berth in the dry thermal cracking device case, in warm top of separating berth in the combustion chamber, in warm separate the bed top the low temperature pyrogenation bed is housed, drying bed is positioned at the top of low temperature pyrogenation bed, drying bed, the low temperature pyrogenation bed, in warm separating air distribution plate is housed on the bed, cyclonic separator is equipped with on the top of drying bed, air is housed on the combustion chamber, fuel gas mixer, drying bed, the low temperature pyrogenation bed, in warm separating between the bed be equipped with communicating pipe, on the housing, the bottom is respectively equipped with the fine coal inlet, the fine coal outlet.

2, utilize technology according to claims 1 described a kind of fine coal grading cleaning multiple, it is characterized in that: communicating pipe is provided with valve.

3, utilize technology according to claims 1 described a kind of fine coal grading cleaning multiple, it is characterized in that: gas exit is equipped with on the top of housing.

4, utilize technology according to claims 1 described a kind of fine coal grading cleaning multiple, it is characterized in that: fugitive constituent is delivered directly to the circular fluid bed internal combustion less than 10% semi-coke powder under hot.