CN101480659B - Method for automatically recycling and treating carbon residue from boiler slag of coal gasification - Google Patents
Method for automatically recycling and treating carbon residue from boiler slag of coal gasification Download PDFInfo
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- CN101480659B CN101480659B CN2009101109566A CN200910110956A CN101480659B CN 101480659 B CN101480659 B CN 101480659B CN 2009101109566 A CN2009101109566 A CN 2009101109566A CN 200910110956 A CN200910110956 A CN 200910110956A CN 101480659 B CN101480659 B CN 101480659B
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Abstract
The invention relates to an automatic carbon residue recovery method for coal gasification slag treatment, which belongs to the technical field of coal gasification slag treatment and is characterized in that mixed slag is filled in a storage hopper, the top of the storage hopper is provided with a spraying device, the mixed slag is adjusted by adding water and stands in the storage hopper for 1-2 hours, and slag and carbon residue are separated from the mixed slag by schizolysis and then sieved; the sieve pore diameters of the front section and the rear section of a sievemesh are different, the slag is sieved out from the front section of the sievemesh, the carbon residue with a grain diameter between 10 mm and 15 mm is sieved out from the rear section of the sievemesh, and original carbon residue contained in the sieved carbon residue and mixed slag enters a second-stage carbon residue storage hopper from the tail part of a revolving screen. The invention utilizes the schizolysis to split the slag by adopting a principle that the stability of two substances with different structures are different because of the difference of the structures, thereby enabling the slag with complex grain diameters to become two materials which are easy to sieve so as to be recycled, such as fine slag with a small grain diameter and carbon residue coalballs which can not be split by the schizolysis but can be recycled, and realizing the automatic recycling of gasification slag carbon residue and the close type treatment.
Description
Technical field:
The invention belongs to the slag of coal gasification processing technology field, is the effective technology that fixed bed intermittent coal gas method slag carbon residue automatically reclaims, especially at being the coal gasification reaction technology of raw material with the binder-type coal briquette.
Background technology:
With the moulded coal ball be contain in the mixing slag that after reacting, produced of the fixed bed intermittent coal gas material of raw material reacted granule slag, unreacted completely under carbon residue coal briquette and the condition of high temperature carbon residue coal briquette and slag hand over fusion bonding slag body.Wherein unreacted completely the carbon residue coal briquette account for the 20-30% of slag body.This part carbon residue recycling can improve the utilization rate of gas making feed coal greatly, reduces energy resource consumption.And the particle diameter of part slag body is suitable, not easily separated with the particle diameter of carbon residue coal briquette in the bonding slag body, melts simultaneously in the slag body that bonds to include the also not easily separated recovery of part carbon residue.How to isolate the key point that the carbon residue coal briquette is a technology.Conventional separate mode is to carry out broken apart or employing jigging floatation to the bonding slag, is to separate according to the difference of its particle diameter or density.These separate mode complex process, investment are big, and slag content is many in the carbon residue that separates, and well recycle carbon residue and must carry out postsearch screening, makes process complications, and operating cost increases.
Summary of the invention:
The objective of the invention is to overcome above-mentioned defective, a kind of method for automatically recycling and treating carbon residue from boiler slag of coal gasification is provided.
The solution of the present invention is: will mix slag and pack in the feed bin, the feed bin top is provided with spray equipment, adds water and regulates mixing slag; Mixing slag time of staying in feed bin of granule slag, carbon residue coal briquette, bonding slag body is 0.5～5 hour, make the differentiation cracking fully in feed bin of bulk bonding slag body, slag and carbon residue are isolated in cracking, enter from feed bin bottom then that the chain bucket conveyer belt is delivered to rotary screen with it or vibratory sieve sieves; Granule slag in the former mixing slag of rotary screen passing-screen size≤15mm and bonding slag body are isolated the slag that is substantially free of carbon residue, the carbon residue of 10-15mm particle diameter is sifted out by the rotary screen screen cloth, in the bottom conveyance conduit enters granule slag storehouse, particle diameter 〉=15mm is essentially carbon residue, from the bonding isolated carbon residue of slag body and mix that original carbon residue coal briquette enters the carbon residue storehouse from the rotary screen afterbody the slag.
The invention has the advantages that: utilize high temperature furnace slag and carbon residue coal briquette adding under the aqueous condition, the different material of two kinds of structures is because of the different principle of its stability of difference on the structure, slag is carried out cracking differentiation, thus make the slag of particle diameter complexity become the thin slag of small particle diameter and two kinds in carbon residue coal briquette can't cracking breaking up recyclable utilization easily the materials of screening sieve recycling.This technology has not only realized the automatic recycling of gas-making cinder carbon residue, and the processing to slag has simultaneously realized enclosed treatment measures, eliminates the problem of original open-air processing a large amount of dust pollutions that produce.And its employed cold shocking water can utilize waste water such as methanol rectified raffinate, has solved the emission problem of waste water such as methanol rectified raffinate.When creating economic benefit, also create great environmental benefit.
Description of drawings:
Accompanying drawing is a structural representation of the present invention.
The specific embodiment:
Flow process of the present invention is as follows: the mixing slag deslagging of the granule slag that gas generator produced, carbon residue coal briquette, the slag body that bonds can adopt slag under artificial or automatic, continuous or intermittence, good slag is transported to the slag field down, directly will mix slag packs in the feed bin (1), feed bin (1) top is provided with spray equipment (2), adds the water adjusting to mixing slag; The mixing slag of granule slag, carbon residue coal briquette, bonding slag body stays for some time in feed bin (1), the abundant cracking of the slag body that is beneficial to bond, and the time of staying is about 0.5～5 hour, and most optimal retention time is 1～2 hour.Bulk bonding slag body is differentiation cracking fully feed bin (1) in, and slag and carbon residue are isolated in cracking, enters then that chain bucket conveyer belt (3) is delivered to rotary screen (4) with it or vibratory sieve sieves bottom the feed bin (1); Granule slag in the former mixing slag of rotary screen (4) passing-screen size≤15mm and bonding slag body are isolated the slag that is substantially free of carbon residue, the carbon residue of 10～15mm particle diameter is sifted out by rotary screen (4) screen cloth, in the bottom conveyance conduit enters granule slag storehouse (5), original its particle diameter 〉=15mm of carbon residue coal briquette from bonding isolated carbon residue of slag body and mixing slag, this part carbon residue and carbon residue coal briquette enter carbon residue storehouse (7) from rotary screen (4) afterbody.
The carbon residue of 10～15mm particle diameter should not be used for gas making system gas in the granule slag, acts as a fuel but can be used for boiler through fragmentation.Therefore can be by the leading portion screen cloth of setting up leading portion≤10mm aperture on rotary screen (4) or the vibratory sieve, between granule slag storehouse (5) and carbon residue storehouse (7), set up preposition carbon residue storehouse (6), earlier the granule slag is gone out to enter in the granule slag storehouse (5) from the leading portion mesh screen, the carbon residue of this part 10～15mm particle diameter is sifted out by the back segment screen cloth, enters preposition carbon residue storehouse (6) through the bottom conveyance conduit; The carbon residue of particle diameter 〉=15mm and carbon residue coal briquette enter carbon residue storehouse (7) from rotary screen (4) afterbody.
Its principle is that reacted its internal and external temperature of bonding slag body all is in the condition of high temperature, and the structure of its slag body is loose relatively, the porosity height.And the carbon residue coal briquette does not react owing to the furnace temperature deficiency in gas generator, and its original structure does not closely go to pot, and porosity is lower.When the material to two kinds of different structures added water cooling, the situation of two kinds of materials was different.High temperature bond slag body is met water, and skin temperature sharply descends, and forms the big temperature difference of top layer and internal layer, and shrink on the top layer, fracture differentiation situation occurs with internal layer.Simultaneously water by slag body opening crack from the top layer toward the internal layer process of osmosis, water is met high temperature and is produced steam, steam from internal layer outward evaporation process also impelled the cracking of slag body to break up.Finishing slag body produces the cracking differentiation under the effect of the temperature difference and gas, form the granule slag.And unreacted carbon residue coal briquette completely, because structure is tightr, water is difficult for infiltration, can not form steam at internal layer, and only can form internal-external temperature difference, only can cause carbon residue coal briquette surface to form part and come off on the surface, the carbon residue coal briquette maintains the original state substantially, cracking differentiation situation can not occur., realize the cracking differentiation of bulk bonding slag body, and the carbon residue coal briquette keeps former graininess substantially, thereby realize that bonding slag fragmentation body and carbon residue coal briquette are easy to the situation of sub-sieve in the different situations that add under the water state according to different material.
Granule slag after the screening and carbon residue carry out the outer use of selling or reclaim with modes such as carbornes.At feed bin (1) and rotary screen (4) top corresponding cleaner being set all handles airborne dust.Seal according to field condition and measure such as spray dust reduces dust pollution at afterbody feed bin (1).
Spray equipment (2) adds the used water of water adjusting to the mixing slag can use methanol rectified raffinate waste water.Waste water is utilized effectively, the conserve water resource.
Claims (2)
1. method for automatically recycling and treating carbon residue from boiler slag of coal gasification is packed high temperature mixing slag in the feed bin (1) into, and feed bin (1) top is provided with spray equipment (2), adds water and regulates mixing slag; Containing the granule slag, carbon residue coal briquette of different-grain diameter, mixing slag time of staying in feed bin (1) of bonding slag body is 0.5～5 hour, make the differentiation cracking fully in feed bin (1) of bulk bonding slag body, granule slag and carbon residue coal briquette are isolated in cracking, enter from feed bin (1) bottom then that chain bucket conveyer belt (3) is delivered to rotary screen (4) with it or vibratory sieve sieves; Through drum screen (4)≤15mm aperture screen cloth sieve from the bonding isolated carbon residue coal briquette of slag body and mix the slag original carbon residue coal briquette afterbody from rotary screen (4) screen cloth and enter carbon residue storehouse (7); Granule slag in the former mixing slag of particle diameter≤15mm and bonding slag body are isolated the slag that is substantially free of carbon residue, the carbon residue coal briquette of 10～15mm particle diameter is by off the net the sifting out of rotary screen (4) screen cloth, then or in the bottom conveyance conduit enters granule slag storehouse (5), or enter the leading portion screen cloth of setting up leading portion≤10mm aperture on rotary screen (4) or the vibratory sieve, between granule slag storehouse (5) and carbon residue storehouse (7), set up preposition carbon residue storehouse (6), earlier the granule slag is entered in the granule slag storehouse (5) from off the net the sifting out of leading portion screen cloth, the carbon residue of this part 10～15mm particle diameter is sifted out on the net by the leading portion screen cloth, enters preposition carbon residue storehouse (6) through the bottom conveyance conduit.
2. method for automatically recycling and treating carbon residue from boiler slag of coal gasification according to claim 1 is characterized in that: mixing slag is 1～2 hour in feed bin (1) time of staying.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101109566A CN101480659B (en) | 2009-01-23 | 2009-01-23 | Method for automatically recycling and treating carbon residue from boiler slag of coal gasification |
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| CN2009101109566A CN101480659B (en) | 2009-01-23 | 2009-01-23 | Method for automatically recycling and treating carbon residue from boiler slag of coal gasification |
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| CN101480659A CN101480659A (en) | 2009-07-15 |
| CN101480659B true CN101480659B (en) | 2011-06-22 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102559264A (en) * | 2012-01-31 | 2012-07-11 | 湖北双环科技股份有限公司 | Method for producing semi-water gas by using blocky furnace slag |
| CN102719276A (en) * | 2012-06-13 | 2012-10-10 | 河北凯跃化工集团有限公司 | Method for cyclic utilization of slags of fixed bed gas generator |
| CN103695066B (en) * | 2013-12-18 | 2016-03-16 | 贵州赤天化集团有限责任公司 | Hard coal coal slurry gasifier discharges reuse method and the structure thereof of thin slag |
| CN107641537B (en) * | 2017-09-28 | 2018-09-21 | 陕西融泰能源控股有限公司 | A kind of slag of coal gasification purifying process and the system for realizing its technique |
| CN110586622B (en) * | 2019-09-24 | 2022-10-28 | 新疆天业（集团）有限公司 | Method for comprehensively utilizing gasifier slag resources |
| CN111974350A (en) * | 2020-08-20 | 2020-11-24 | 蒋南 | Deep processing method of coal gasification fine slag |
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