CN102746903B - Large-scale domestic garbage dry distillation and gasification furnace without exhaust gas or dioxin emission - Google Patents

Large-scale domestic garbage dry distillation and gasification furnace without exhaust gas or dioxin emission Download PDF

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CN102746903B
CN102746903B CN201210242049.9A CN201210242049A CN102746903B CN 102746903 B CN102746903 B CN 102746903B CN 201210242049 A CN201210242049 A CN 201210242049A CN 102746903 B CN102746903 B CN 102746903B
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gas
rubbish
destructive distillation
dry distillation
combustion
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CN102746903A (en
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余式正
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Abstract

The invention relates to a domestic garbage dry distillation and gasification furnace. The domestic garbage dry distillation and gasification furnace is divided into a plurality of standard dry distillation treatment units, a large-scale domestic garbage dry distillation and gasification furnace is formed according to different treatment capability requirements, a standard dry distillation unit is a cubic furnace body, a garbage dry distillation section (23) and a drying section (21) are arranged above the cubic furnace body, the garbage is subjected to dry distillation when the garbage is in an anaerobic state, dry distillation coal gas and carbide residues are decomposed, carbides are combusted at a lower combustion layer (6) to generate high temperature, water vapor and air are used as gasification agents, CO2 (carbon dioxide) and water vapor generated by the combustion are reduced by carbides at a reducing layer (7) in the high temperature state, gasified coal gas is generated, and dioxin is not generated; the garbage at the garbage dry distillation section (23) is subjected to heating and dry distillation by the high-temperature gasified coal gas in the lifting process, the high-temperature gasified coal gas is continuously lifted, the garbage at the drying section is dried, organic matters in the garbage are converted into clean fuel gas, the dry distillation coal gas and the gasified coal gas are collected for utilization, and the large-scale domestic garbage dry distillation and gasification furnace without exhaust gas or dioxin emission is realized.

Description

A kind of large-scale, without waste gas with the domestic refuse destructive distillation-vapourizing furnace of dioxin emission
Technical field
The present invention relates to a kind of follow-on built-up type domestic refuse destructive distillation-vapourizing furnace, by putting into the melting pot two stage type gas generating furnace structure, improve its processing efficiency, and make it the mode of applicable unit combination, can, according to the needs of different treatment ability, be combined into for the treatment of the large-scale domestic refuse destructive distillation-vapourizing furnace of rubbish.Technical field belongs to environmental protection and energy-saving and emission-reduction.
Background technology
The structure of well-known , dioxin be one or two oxygen in conjunction with two phenyl ring that replaced by chlorine, so its generation must possess two conditions: the one, have the existence of chlorine; Another is that oxidizing reaction occurs.Composting can have chlorine, and burning is oxidizing reaction, so waste incineration just in time meets two conditions that produce dioxin, accordingly it can be asserted that: waste incineration unavoidably can produce Dioxins; Waste incineration produces a large amount of waste gas simultaneously, is discharged in the air the Greenhouse effect of contaminate environment, the aggravation earth; Atmosphere and surrounding environment are produced serious influence, be subject to coming down hard upon of the masses.Meanwhile, waste incineration investment is large, and running cost is high, and maintenance cost is high, makes the government in general city hold and can't stand, Difficulty, causes many urban formation garbage-surrounded cities, leads to rubbish crisis.
We adopt domestic refuse retorting technique to process domestic refuse, the generation that can stop dioxin completely in the past.Because the decomposition reaction that destructive distillation is solid organic matters under isolated air condition, even if there is chlorine to exist, there is no oxygen, oxidizing reaction does not occur can not produce dioxin yet; And then coal compound (or inflammable gas),, because there is no chlorine, can not produce dioxin yet.This technique is just in time basic identical with the production technique of two stage type gas generating furnace, but the small scale of producer gas generator, can only process the processing 100 tons of following domestic refuses for day, this just can not adapt to the actual needs of garbage treatment, the actual needs of big city domestic rubbish disposal particularly, for example Shanghai daily output rubbish is 20000 tons, 18400 tons, Beijing daily output rubbish, so require refuse treatment plant to maximize, the waste incineration field of 3000 tons of day processing is being set about building in Beijing.
The object of the present invention is to provide and a kind ofly according to us, about rubbish destructive distillation, can fundamentally stop to produce the theory of dioxin, utilize the basic structure of producer gas generator to be transformed, innovate, a kind of novel, high-level efficiency is provided and can adopts unit combination mode, the difference of processing power as requested, the synthetic daily handling ability of respective sets is at the large-scale domestic refuse destructive distillation-vapourizing furnace of 100-1000 ton (and more than); Both realize refuse treatment Wu dioxin emission, non-exhaust emission, and met the domestic refuse destructive distillation-vapourizing furnace of demand of the maximization of refuse treatment plant.
Summary of the invention
The present invention transforms, innovates on the basis of two stage type gas generating furnace, provides a kind of domestic refuse destructive distillation-vapourizing furnace is divided into a plurality of standard destructive distillation processing units, according to the needs of different treatment ability, is combined into large-scale domestic refuse destructive distillation-vapourizing furnace; Standard destructive distillation processing unit makes cube, sealing body of heater into producer gas generator cylindrical furnace, is convenient to assembled a plurality of processing unit, realizes and maximizing; Standard destructive distillation processing unit top arranges retort section and the dryer section of rubbish, utilize rubbish first rubbish destructive distillation under anaerobic state, decomposite inflammable gas (being referred to as " dry distillation gas ") and carbide residue, carbide below burning produce high temperature, with water vapor and air, make vaporized chemical, the CO that the carbide under the condition of high temperature produces burning 2and water vapour (H 2o) reduction, generates semi-water gas (CO, H 2and N 2deng, can be referred to as " gasification gas "), the gasification gas of high temperature the heating of the rubbish of retort section, makes rubbish destructive distillation (decomposition reaction) in the process rising, and gasification gas continues to rise, the rubbish of dryer section is heated, dried; Collect dry distillation gas and gasification gas and utilize, thereby both realized domestic rubbish disposal without dioxin emission, non-exhaust emission, realize again maximize built-up type domestic refuse destructive distillation-vapourizing furnace.
The technical scheme that the present invention solves its technical problem is:
The technical scheme of technical solution problem of the present invention is: domestic refuse destructive distillation-vapourizing furnace is divided into a plurality of standard destructive distillation processing units, and the difference of processing power as required, respective sets is synthesized large-scale domestic refuse destructive distillation-vapourizing furnace; Each standard processing unit adopts cube and sealed structure, is convenient to simultaneously assembled a plurality of standards and processes stove unit, forms large-scale domestic refuse destructive distillation-vapourizing furnace, as the pit kiln of steel mill, realizes refuse treatment plant and maximizes; Each standard processing unit is inner, the pipe core of original cylindrical producer gas generator, changes into whole row's middle comb, and standard processing unit is separated into symmetrical left and right two portions; In order to allow rubbish effectively heat, the width of every part rubbish is generally advisable at 1-2 rice; Top arranges retort section and the dryer section of rubbish, utilize rubbish first rubbish destructive distillation under anaerobic state, decomposite dry distillation gas and carbide residue, carbide below zone of combustion burning produce high temperature, with water vapor and air, make vaporized chemical, the CO that the carbide under the reducing zone condition of high temperature produces burning 2and water vapour (H 2o) reduction, generates gasification gas (CO, H 2and N 2deng), the gasification gas of high temperature rubbish for rubbish retort section in the process rising provides heating heat, and rubbish destructive distillation is decomposed, then rises to drying garbage section and make rubbish heating, dry; In addition, because the ventilation property of rubbish and carbide is bad, the resistance that scorching hot gasification gas sees through carbide and waste layer rising is larger, cause and from gasification gas, directly obtain heating heat and can't make the abundant destructive distillation of rubbish, dry, and because gasification gas rise obstructed, wherein reducing gas CO, N 2be detained, carbide burning is just not vigorous, slow down the combustionvelocity of carbide, thereby reduce the efficiency of refuse treatment, for this reason, in standard destructive distillation, process the retort section of stove unit, specially in surrounding and middle, high-temperature fuel gas chamber is set, the inwall of high-temperature fuel gas chamber has ventilation hole, dry distillation gas enters high-temperature fuel gas chamber by these ventilation holes, and gasification gas mixes, pools together, and relies on the high temperature (more than 600 ℃) of combustion gas, make the tarry vapours in dry distillation gas produce cracking, generate micromolecular combustion gas; By radiation, the rubbish being clipped in the middle is heated to fully destructive distillation simultaneously; In dryer section, combustion gas ventpipe is set, guiding gas (comprising gasification gas and dry distillation gas) rises; The breathing area of high-temperature fuel gas chamber is larger than combustion gas ventpipe, so combustion gas is long in the high-temperature fuel gas chamber residence time, and rubbish is by fully heating, destructive distillation; And flow velocity is low, the flue dust being mixed in gasification gas also drops, and plays the effect of dedusting; High-temperature fuel gas rises to dryer section from combustion gas ventpipe, makes rubbish heating, dry; The water vapor that drying garbage produces must leave as early as possible, otherwise rubbish just can not enter destructive distillation state, affects the processing efficiency of rubbish, for this reason, the escape pipe of water vapor is set between two combustion gas ventpipes, also has logical steam vent, the water vapor that drying garbage produces enters water vapor hole escape pipe through ventilating pit, fast rise arrives furnace roof, because water vapor is not detained, can leave as early as possible, rubbish flash baking, enter retort section, carry out decomposition reaction, so processing efficiency improves; Finally, collect dry distillation gas and gasification gas, can carry out various utilizations; Drying garbage has consumed a large amount of vaporization heat, and the water vapor of generation is also useful resource, can be in order to being used as vaporized chemical.
The invention has the beneficial effects as follows:
1, do not produce Dioxins
Waste incineration unavoidably can produce Dioxins.Rubbish is first completely cutting off under air condition rubbish destructive distillation, because do not have oxygen just can not produce dioxin in destructive distillation-vapourizing furnace; And then combustion carbide, do not have chlorine can not produce dioxin yet.This is that the rationale that does not produce dioxin is processed in rubbish destructive distillation.In fact, because the organism in rubbish all changes clean gas into, all collect and utilize, discharge, does not have dioxin naturally.
2, there is no exhaust gas emission, there is no smokestack, do not pollute
Waste incineration per ton will produce the waste gas of 4000-7000 cubic meter, forms having a strong impact on the severe contamination of air and weather.The high temperature that particularly waste incineration produces, generates NOx and SOx, more serious on the impact of environment.Utilize the treating refuse of domestic refuse destructive distillation-vapourizing furnace, waste gas CO 2be taken as the utilization of resources, there is no exhaust gas emission, do not form the pollution to environment.
3, rubbish is without classification
The treating refuse of domestic refuse destructive distillation-vapourizing furnace, rubbish is without classification.Waste incineration, in order to suppress the generation of dioxin, needs refuse classification.This needs broad masses' cooperation, and the whole people take action and from source, carry out refuse classification.But China does not carry out the custom of refuse classification; Also need to carry out separate waste collection, classification transportation, classification processing, increase many inputs.
4, realize real garbage decrement
Past people have unilateral understanding for minimizing: think that waste incineration is fallen, " eyes be cannot see " is exactly minimizing.In fact conservation of matter, we can not " burn rubbish not ", but become waste gas, volume is large, and damaging range is wide, refers to that the physical form of rubbish changes: discarded rubbish has been eliminated, convert useful clean gas to, the garbage decrement that this ability is real.
5, waste gas is also used, realizes unique resource utilization
Refuse treatment combustion of organic matter, produces a large amount of waste gas, in the present invention the CO in waste gas 2also be used as resource, it be reduced into CO and recycle, this is unique garbage as resource utilization.
6, unit combination realizes refuse treatment plant maximization
Past waste incineration unavoidably can produce Dioxins, and many treatment of urban garbage reconnaissances are very difficult, thus require to maximize, to meet the needs of refuse treatment.And grate furnace in the past cannot be realized maximization, and investment is large, and popularization is restricted.The present invention can get up fixed grate unit combination according to actual needs, forms large-scale grate furnace, can meet metropolitan demand, contributes to crack rubbish crisis.
7, overcome the difficult problem that refuse treatment investment is large, running cost is high, maintenance cost is high
Garbage incinerating system is complicated, during processing, need to spend substantial contribution to carry out waste gas pollution control and treatment, flying dust disposal, cause the investment of refuse treatment large, running cost is high, maintenance cost is high, the government burden in general city and small towns does not rise, and becomes the hang-up of puzzlement governments at all levels.The utilization of domestic refuse biological fuel gas overcomes this difficult problem completely.
8, energy-saving and emission-reduction are remarkable especially, can carry out carbon transaction
Past garbage loading embeading, produces a large amount of greenhouse gases, is mainly methane, and its Greenhouse effect are also stronger 21 times than CO2.The whole world is in order to tackle climate warming, and United Nations repeatedly holds energy-saving and emission-reduction meeting.The treating refuse of domestic refuse destructive distillation-vapourizing furnace, avoids the discharge of methane completely; Meanwhile, clean gas can replace fire coal, saves again CO 2discharge, can carry out carbon transaction (CDM), betray carbon index, obtain abundant additional income.
9, clean gas can have multiple application
The recycling of waste incineration can only do cogeneration, and first waste incineration and generating electricity needs a large amount of investments, builds a garbage incinerating power plant more much more than the power station investment of building a same power generation capacity; Secondly, the inefficiency of waste incineration and generating electricity, has a large amount of heats to run away with waste gas; The efficiency of waste heat boiler and steam turbine is low; The 3rd, day treatment scale is at the small-scale garbage incinerating power plant below 200 tons, and economic benefit is low, is difficult to recoup the investment, and is not suitable for building garbage incinerating power plant and has become common recognition; The 4th, garbage incinerating power plant is produced unstable, online difficulty.The present invention is converted to clean gas rubbish, can directly supply domestic gas, or provides Industrial Boiler to use; Also can be used for fuel gas generation efficiency higher, higher than the efficiency of waste incineration and generating electricity; More can be used for baking bricks, consume the inorganics in rubbish simultaneously; Can also carry out synthetic.All these, can obtain other income, and refuse treatment becomes profitable new forms of energy.
Accompanying drawing explanation
Figure 1A is the structural representation of single standard destructive distillation processing unit;
Figure 1B is its side sectional view (MN analyses and observe).
Fig. 2 is combined, is formed rubbish destructive distillation-vapourizing furnace grate furnace floor plan schematic diagram of large-scale non-exhaust emission by standard destructive distillation processing unit;
In figure: 1---pneumatic blower or general gas blower, 2---water vapour ventpipe, 3---air ventpipe, 4---the tuyere of air and water vapour, 5---fire grate, 6---zone of combustion, 7---reducing zone, 8---the carbide residue that destructive distillation stays, 9---collect the high-temperature fuel gas chamber of gasification gas and dry distillation gas, 10---a left side, right briquetting, 11---effuser, 12---left pusher hydro-cylinder, 13---left opening for feed, 14---left binder hydro-cylinder, 15---air mixture air outlet, 16---right binder hydro-cylinder, 17---dry distillation gas and water vapor air outlet, 18---right opening for feed, 19---right pusher hydro-cylinder, 20---feed throat, 21---dryer section, 22---combustion gas ventpipe, 23---retort section (comprising carbide residue), 24---the carbide residue that rubbish destructive distillation is residual, 25---ash bed, 26---ceramic thermal barrier layer, 27---ash bucket, 28---fire door, 29---bilateral ceramic thermal barrier layer, 30---the escape pipe of water vapor, 31---dry distillation gas and gasification gas effuser, 32---water steams effuser, I---first standard destructive distillation processing unit, II---the second standard destructive distillation is processed unit, the 3rd standard destructive distillation processing unit of III, IV---the 4th standard destructive distillation processing unit, N---until N standard destructive distillation processing unit.
Specific embodiment
According to Fig. 1, follow-on built-up type domestic refuse destructive distillation-vapourizing furnace is to be combined by standard destructive distillation processing unit.Standard destructive distillation processing unit adopts cube and sealed structure, and inner at standard processing unit, fire-resistant heat insulating material liner is used in the inwall of stove (26) and (29), prevents heat loss; The pipe core of cylindrical producer gas generator is in the past changed into whole row's middle combustion gas ventpipe (22) and high-temperature fuel gas chamber (9), standard processing unit is separated into symmetrical left and right two portions; In order to allow rubbish can fully be heated destructive distillation with dry, the width of every part rubbish (being the distance between combustion gas ventpipe (22)) is advisable with 1-2 rice; Because process to as if rubbish, with producer gas generator process to as if coal have this qualitative difference, so must put into the melting pot feed system: rubbish enters from two opening for feeds (13) and (18) on left and right both sides, by left and right two pusher hydro-cylinders (12) and (19), rubbish is pushed in stove; Be subject to the extruding of pusher hydro-cylinder (12) and (19), it is closely airtight that rubbish becomes, pusher hydro-cylinder (12) and (19) all do not push rubbish in stove, retain the rubbish shutoff feed throat (20) that a part compresses, and prevent gas leak; In order to prevent that stove rubbish from hardening, furnace roof arranges binder hydro-cylinder (14) and (16), after rubbish enters stove, drives left and right briquetting (10) to depress from above, even if rubbish hardens, also can guarantee reliable blanking; In stove from top and lower retort section (23), dryer section (21), reducing zone (7), zone of combustion (6) and the ash bed (25) that rubbish is set; Utilize the effect of driveing that rubbish is stacked, lack air and rubbish destructive distillation generation dry distillation gas, rubbish is just in isolated air condition, in this state first rubbish heating destructive distillation, decomposite dry distillation gas and carbide residue (24), carbide below zone of combustion (6) burning produce high temperature, with water vapor and air, make vaporized chemical, tuyere (4) by air and water vapour blasts from stove below through fire grate (5), contact, burn with the carbide of zone of combustion (6), produce high temperature; In the top of zone of combustion (6), be reducing zone (7), the CO that zone of combustion (6) burning produces 2by the carbide under the condition of high temperature, reduced at reducing zone (7) with the water vapour rising, generate gasification gas: C+CO 2→ 2CO and C+H 2o → CO+H 2; Gas pipe and pipe core at the original producer gas generator of destructive distillation floor surrounding are transformed into the high-temperature fuel gas chamber (9) of collecting gasification gas and dry distillation gas; The inner side of high-temperature fuel gas chamber (9) has ventilation hole, dry distillation gas can enter high-temperature fuel gas chamber (9) by these ventilation holes, because the temperature of high-temperature fuel gas chamber (9) very high (more than 600 ℃), make the tarry vapours containing in dry distillation gas, at high temperature produce cracking, generate micromolecular combustion gas; By radiation indirect heating rubbish, make the abundant destructive distillation of garbage drying being clipped in the middle on the other hand; Air mixture rises to dryer section (21), high-temperature fuel gas chamber (9) is made combustion gas ventpipe (22) into, straight-through furnace roof, makes the rubbish of dryer section except being subject to the dry distillation gas heat drying of top decilitre, is to be mainly subject to combustion gas ventpipe (22) radiation heating, oven dry; The escape pipe (30) that inserts water vapor between two combustion gas ventpipes, the escape pipe of water vapor (30) also has vapor opening, and the water vapor that drying garbage produces enters the escape pipe (30) of water vapor through vapor opening, arrive rapidly furnace roof; Water vapor is not detained and fast rise, and rubbish is able to rapid drying, improves refuse treatment efficiency; The sectional area of the sectional area ratio dryer section combustion gas ventilation comb (22) of retort section (23) high-temperature fuel gas chamber (9) is much bigger, and the flow velocity of combustion gas is slow, and the flue dust that makes to be mixed in gasification gas falls, and plays the effect of dedusting; In stove, burn unbalanced time, producer gas generator can only turn down combustion gas ventpipe (22) and reduce temperature of combustion, if adopt pneumatic blower here, the tuyere (4) of a plurality of air and water vapour can be set, according to combustion case in stove, for example temperature of combustion is high, with regard to increasing the add-on of water vapor, reduce temperature of combustion, the equilibrium of temperature of combustion in regulating stove, owing to increasing water vapor as vaporized chemical, can reduce the amount of blasting of air, just reduce N remaining in combustion gas 2gas, has increased again H 2generation, also just improve the calorific value of combustion gas; Dry distillation gas and gasification gas mix, from effuser (31), collect and utilize together, different with the epimere gas of producer gas generator, what from water vapor effuser (32), collect is mainly the water vapor that drying garbage produces, and wherein contains small portion dry distillation gas, can be used as vaporized chemical uses, the mass energy of saving softening water and generation water vapor, wherein contains part combustion gas, in zone of combustion burning, also can improve temperature of combustion, increase the add-on of water vapor, improve the calorific value of combustion gas.
According to Fig. 2, N standard destructive distillation processing unit combined, if each standard destructive distillation processing unit daily handling ability is 100 tons, daily handling ability just can reach N * 100 ton.As long as combining, 10 standard destructive distillation processing units just can realize 1000 tons of day processing.And if N standard destructive distillation processing unit combines, except initial two unit, middle unit can save the ceramic thermal barrier layer (26) of both sides.
If require larger daily handling ability, can be combined into two groups or three groups by Fig. 2, just can realize daily handling ability and realize easily maximization over the rubbish destructive distillation-vapourizing furnace of 1000 tons.
The practicality of industry
The present invention is not only applicable to refuse treatment, is applicable to producer gas generator and stalk gasifier yet, even, for non-grain physiological clock is converted to clean gas, realizes the alternative new forms of energy of fossil energy.

Claims (9)

1. a follow-on built-up type domestic refuse destructive distillation-vapourizing furnace, it is characterized in that: this domestic refuse destructive distillation-vapourizing furnace has a plurality of standard destructive distillation processing units: described standard destructive distillation processing unit has the body of heater of cube, sealing, be convenient to a plurality of standard destructive distillation processing units assembledly, realize maximize; And utilize Zheng Pai center combustion gas ventpipe (22) and whole row's the high-temperature fuel gas chamber (9) of collecting gasification gas and dry distillation gas, standard destructive distillation processing unit is separated into symmetrical left and right two portions; Rubbish enters from two opening for feeds (13,18) on left and right both sides, by left and right two pusher hydro-cylinders (12,19), rubbish is pushed in stove; Be subject to the extruding of pusher hydro-cylinder (12,19), it is closely airtight that rubbish becomes, and pusher hydro-cylinder (12,19) does not all push rubbish in stove, retains the rubbish shutoff feed throat (20) that a part compresses, and prevents gas leak; Described standard destructive distillation processing unit arranges retort section (23) and the dryer section (21) of rubbish from top to bottom, reducing zone (7), zone of combustion (6) and ash bed (25): high-temperature fuel gas chamber (9), corresponding to the position of retort section (23), combustion gas ventpipe (22) is corresponding to the position of dryer section (21); Utilize the effect of driveing that rubbish is stacked, lack air and rubbish destructive distillation generation dry distillation gas, rubbish just, in isolated air condition, first rubbish destructive distillation, decomposites dry distillation gas and carbide residue, because there is no oxygen, oxidizing reaction do not occur, so just can not produce dioxin; With water vapor and air, make vaporized chemical, tuyere (4) by air and water vapour blasts from stove below through fire grate (5), contact, burn with the carbide of zone of combustion (6), because there is no chlorine, carbide burning can not produce dioxin yet.
2. follow-on built-up type domestic refuse destructive distillation-vapourizing furnace according to claim 1, it is characterized in that: described standard destructive distillation processing unit is separated into symmetrical left and right two portions, in order to allow rubbish can fully be heated destructive distillation with dry, the width of every part, the distance between combustion gas ventpipe (22) is 1-2 rice.
3. follow-on built-up type domestic refuse destructive distillation-vapourizing furnace according to claim 1, is characterized in that: carbide produces high temperature in zone of combustion (6) burning, the CO that the carbide under the condition of high temperature produces burning 2and water vapour (H 2o) reduction, generates gasification gas: C+CO 2→ 2CO and C+H2O → CO+H 2; The gasification gas of high temperature heats the rubbish of rubbish retort section (23) in the process rising, make rubbish destructive distillation, decomposition, coal gas continues to rise, the rubbish of dryer section (21) is heated, dried, collecting dry distillation gas and gasification gas utilizes, thereby both realized domestic rubbish disposal Wu generation of dioxin, the ideal of non-exhaust emission.
4. follow-on built-up type domestic refuse destructive distillation-vapourizing furnace according to claim 1, it is characterized in that: the escape pipe (30) that inserts water vapor between two combustion gas ventpipes (22), the escape pipe of water vapor (30) has vapor opening, the water vapor that drying garbage produces enters the escape pipe (30) of water vapor through vapor opening, arrive rapidly furnace roof: water vapor fast rise, be not detained, rubbish is able to rapid drying, improves refuse treatment efficiency.
5. follow-on built-up type domestic refuse destructive distillation-vapourizing furnace according to claim 1, it is characterized in that: adopt pneumatic blower, the tuyere (4) of a plurality of air and water vapour is set, according to combustion case in stove, if the temperature of burning is high, with regard to increasing the add-on of water vapor, reduce temperature of combustion, in regulating stove, temperature of combustion reaches balanced; Owing to increasing water vapor as vaporized chemical, can reduce the amount of blasting of air, just reduce N remaining in combustion gas 2gas, has increased again H 2generation, improve the calorific value of combustion gas.
6. follow-on built-up type domestic refuse destructive distillation-vapourizing furnace according to claim 3, it is characterized in that: dry distillation gas and gasification gas are mixed, from effuser (31), collect and utilize together, and what collect from water vapor effuser (32) is mainly the water vapor that drying garbage produces, using it as vaporized chemical uses, save softening water and save the energy consumption that produces water vapor, even if contain a small amount of dry distillation gas, in zone of combustion burning, also can improve temperature of combustion, for control combustion temperature will increase the add-on of water vapor, reduce the air amount of blasting, thereby reduce N 2content, increases H 2content, improves the calorific value of combustion gas.
7. follow-on built-up type domestic refuse destructive distillation-vapourizing furnace according to claim 1, it is characterized in that: in order to prevent that stove rubbish from hardening, furnace roof arranges binder hydro-cylinder (14,16), after rubbish enters stove, drive left and right briquetting (10) to depress from above, even if rubbish hardens, also can guarantee reliable blanking.
8. follow-on built-up type domestic refuse destructive distillation-vapourizing furnace according to claim 1, it is characterized in that: the inner side of high-temperature fuel gas chamber (9) has ventilation hole, dry distillation gas can enter high-temperature fuel gas chamber (9) by these ventilation holes, because the temperature of high-temperature fuel gas chamber (9) reaches more than 600 ℃, make the tarry vapours containing in dry distillation gas, at high temperature produce cracking, generate micromolecular combustion gas; By radiation indirect heating rubbish, make the abundant destructive distillation of garbage drying being clipped in the middle on the other hand.
9. follow-on built-up type domestic refuse destructive distillation-vapourizing furnace according to claim 1, it is characterized in that: air mixture rises to dryer section (21), high-temperature fuel gas chamber (9) is made combustion gas ventpipe (22) into, straight-through furnace roof, making the rubbish of dryer section except being subject to the dry distillation gas heat drying of part rising, is to be mainly subject to combustion gas ventpipe (22) radiation heating, oven dry; The sectional area of the sectional area ratio dryer section combustion gas ventpipe (22) of retort section (23) high-temperature fuel gas chamber (9) is large, and the flow velocity of combustion gas is slow, and the flue dust that makes to be mixed in gasification gas falls, and plays the effect of depositing dust.
CN201210242049.9A 2012-07-13 2012-07-13 Large-scale domestic garbage dry distillation and gasification furnace without exhaust gas or dioxin emission Expired - Fee Related CN102746903B (en)

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