CN2697100Y

CN2697100Y - Double-fire layer water gas generating furnace from bituminous coal

Info

Publication number: CN2697100Y
Application number: CNU03206568XU
Authority: CN
Inventors: 陈家仁
Original assignee: Zhu Shengchang
Current assignee: Zhu Shengchang
Priority date: 2003-07-29
Filing date: 2003-07-29
Publication date: 2005-05-04
Anticipated expiration: 2013-07-29

Abstract

The utility model discloses a water gas generation furnace with double fire layers whose upper portion and lower portion are respectively provided with a fire layer and the furnace top is provided with a sealing coal feeding bucket (1). The side surface is provided with a steam, air or oxygen-enriched air inlet (2). The coal gas outlet on the middle portion of the furnace is provided with a gas distributor and an ash blocking ring (3). The peripheries of the upper fire layer and the lower fire layer are respectively provided with a water jacket (4, 5). The lower portion of the furnace body is provided with a slag discharging device formed by a slag broking ring (6), a rotating furnace grate (7) and a sealing ash bucket. The lower bottom portion is provided with a steam, air or oxygen-enriched air or lower blowing coal gas access opening (8). The water gas generation furnace can use the bituminous lump coal of low price and the bituminous coal type coal to replace the anthracite coal or coke briquette with high price. The production does not contain the synthesized raw gas of coke tar and hydrocarbon. The productivity is higher than the prior furnace with the same diameter and the energy is saved. The content of the inertness substance CH4 in the synthesize gas can be reduced to reduce the gas discharge quantity in the synthesize pool. The technology is simple, convenient, safe, reliable, small change to the prior equipment, a little reconstruction investment with convenience.

Description

Double fire layer bituminous coal blue-gas generator

Technical field

The utility model relates to a kind of with the double fire layer blue-gas generator of bituminous coal as the positive pressure operation of raw material preparing synthetic gas (water-gas or semi-water gas).

Background technology

Existing water-gas generators kind is many, and the atmosphere intermission water-gas generators of moving-bed is arranged, the continuous water-gas generators of oxygen enrichment, pressurized-gasification furnace, fluidized-bed broken coal vapourizing furnace (comprising that oxygen enrichment reaches air, steam continuously and intermittently makes gas) and large-scale pure oxygen gas flow bed gasification furnace etc.China's small and medium chemical fertilizer and Methanol Plant adopt the water-gas generators of moving-bed batch production mostly, promptly so-called UGI stove.Some has the middle scale nitrogenous fertilizer plant of oxygen generating plant to adopt successive oxygen enrichment gas-made technology.These factories are simpler because of the gas purification of back system, can only use anthracite block coal and lump coke mostly.Because of resource and imbalance between supply and demand cause the anthracite block coal coal price to improve again and again, make large quantities of nitrogen fertilizer plants face break.But the price of the natural coke of bituminous lump coal and some bituminous coal Coal Production is relatively low.Especially the shaped coal of bituminous coal general cost only reaches 1/2 of anthracite block coal, has a large amount of coal tar and hydrocarbons but make raw material with these in the water-gas of the UGI of routine stove production, and the serious problem of bringing is processed in the purification of water-gas.Once the someone tested that to blow below the employing be that main scheme is raw material production water-gas with bituminous coal, but still can't thoroughly remove material such as tar in blowing air system and water gas system, can not be used for synthetic gas production.

Summary of the invention

The purpose of this utility model provides a kind of bituminous coal that uses to be raw material production water-gas, but can not contain the double fire layer blue-gas generator of coal tar and hydrocarbons in the water-gas just at the problem of above-mentioned existence.

The purpose of this utility model is achieved in that a fire bed is respectively arranged at the stove top of this double fire layer blue-gas generator and bottom; At the Packed coal bunker that adds of furnace roof, guarantee in the steaming out process that the steam coal bunker that can not bleed can blow off coal gas; The furnace side face has steam, air or oxygen-enriched inlet, and gas exit place, stove middle part is provided with gas distributor and ash-stopping ring, prevents too much taking out of of blowing, system gas stage gas distributions inequality and particulate coal dust; Be equipped with water jacket around upper and lower described two fire beds, prevent inwall dross and self-produced steam; The body of heater bottom is provided with the slag discharging device that break circle, travelling grate and sealing ash bucket are formed, lower bottom part be provided with steam, air or oxygen-rich air and under blow the coal gas gangway.

The double fire layer blue-gas generator that the utility model provides does not contain hydrocarbons such as tar by double fire layer gasification preparation water-gas in the coal gas of making, be applied to the production of synthetic gas.The foundation of double fire layer is with to keep be all to advance air (or oxygen-rich air) by upper and lower two, blows main steam of stage and advance stove from two inlets up and down again and meet accident with the blowing stage subsequently that prevents on secondary.

The double fire layer blue-gas generator that the utility model provides compared with prior art has following advantage:

(1) can replace high smokeless coal cinder and the coke briquette of price with price lower bituminous lump coal and shaped coal of bituminous coal.Produce the synthetic raw gas that does not contain tar and hydro carbons.

(2) throughput is than having the stove height now with diameter.Existing equipment is changed not quite, investment for trnasforming urban land province and convenient.

(3) technology is easy, safe, reliable.

(4) can reduce inert material CH in the synthetic gas ₄Content, the synthesis purge gas amount is reduced.Energy-saving and cost-reducing.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is furnace binding figure of the present utility model.

Embodiment

As shown in Figure 1, coal supply apparatus 1 is sealing coal bunker and lower seal bell jar formation, and dipleg (looking the big I thin material leg in stove footpath or many diplegs) 9 is arranged at the bottom, makes the bed of material be controlled at required height.Carry out full dipleg coal, accomplish not blowing out coal.Epimere body of heater 10 is made up of water jacket 4, upper end gasification agent inlet 2 and bottom coal gas (going out) steam (going into) import and export 3 and refractory materials etc.The hypomere furnace body by down water jacket 5, break circle 6, push away grey cutter and fire grate 7, stove lower cone and sealing ash bucket 12, down gasification agent inlet and under blow gas exit 8 and upper-lower seal push-pull valve 13,14 constitutes.The device 11 that ash disposal system is made up of motor, reduction box and conical gear constitutes.

As when adopting oxygen enrichment or pure oxygen and steam to make vaporized chemical, can adopt following technical process.

Vaporized chemical oxygen, air and superheated vapour advance stove by two inlets up and down, and the allocation proportion of upper and lower gasification dosage and steam proportioning change according to the number of fugitive constituent in the coal, and the high raw material epimere that volatilizees is more large-minded and the steam dosage is littler, and vice versa.It is at all levels that vaporized chemical that top enters and coal charge form drying, dry distillation, burning cracking, reductive cleavage, and the water-gas of generation is come out of the stove through gas distributor and ash-blocking ring, is not contained the water-gas of tar and high hydrocarbons pollutant.The bottom is gone into the vaporized chemical of stove and is come out of the stove from the middle part gas exit with the water-gas that top produces through grieshoch, following fire bed, reducing zone, gas distributor and ash-blocking ring in stove.After coal gas and the flying dust of carrying secretly advance the tornado dust collector dedusting, enter the vapor superheater heat exchange with steam superheating, the coal gas after the cooling then advances waste heat boiler and produces steam again, or directly advances the last air inlet cabinet of cooling and dedusting system of coal gas.

As adopt air, steam intermittently to make gas, can be undertaken by following flow process.During operation, on secondary, blow stage steam and go into stove from upper and lower gasification agent inlet, the final air inlet cabinet of the water-gas of generation gas exit system in stove earlier.The blowing stage after blowing on the secondary blasts air up and down, and the blowing air of being come out by gas exit in the stove goes waste heat boiler to produce steam after the tornado dust collector dedusting.Can advance steam from gasification agent inlet up and down in the last blowing gas stage, the water-gas of generation finally enters gas holder by stove middle part gas exit water inlet coal gas system.Under blow the stage, steam is gone into stove by stove middle part gas exit, produces water-gas and blows gas exit by subordinate down and advance coal gas system, final air inlet cabinet.Constitute the circulation of a system gas like this.

Claims

1, a kind of blue-gas generator of double fire layer is characterized in that: a fire bed is respectively arranged at stove top and bottom; At the Packed coal bunker (1) that adds of furnace roof, guarantee in the steaming out process that the steam coal bunker that can not bleed can blow off coal gas; There are steam, air or oxygen-enriched inlet (2) in the side, and gas exit place, stove middle part is provided with gas distributor and ash-stopping ring (3), prevents too much taking out of of blowing, system gas stage gas distributions inequality and particulate coal dust; Be equipped with water jacket (4,5) around the upper and lower fire bed, prevent inwall dross and self-produced steam; The body of heater bottom is provided with the slag discharging device that break circle (6), travelling grate (7) and sealing ash bucket are formed, lower bottom part be provided with steam, air or oxygen-rich air and under blow coal gas gangway (8).