CN101987975B - Gas producer and gas preparation method - Google Patents
Gas producer and gas preparation method Download PDFInfo
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- CN101987975B CN101987975B CN201010109510.4A CN201010109510A CN101987975B CN 101987975 B CN101987975 B CN 101987975B CN 201010109510 A CN201010109510 A CN 201010109510A CN 101987975 B CN101987975 B CN 101987975B
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Abstract
The invention relates to a gas producer and a gas preparation method. The gas producer comprises a hearth, a reducing zone and a gas guide zone which are sequentially arranged in a producer wall from top to bottom, wherein a pulverized coal inlet is formed on the wall face of the hearth; a second gas inlet is formed on the wall face of the reducing zone, and a fine pulverized coal inlet is also formed on the wall face of the reducing zone or a wall face at the intersection of the reducing zone and the hearth. The method comprises the following steps of: introducing pulverized coal particles and a gasification agent into the gas producer for burning; and introducing fine pulverized coal particles into the gas producer to ensure that the materials in the gas producer are reacted to form carbon monoxide and hydrogen gas. In the invention, the technical means of forming the fine pulverized coal inlet on the gas producer for leading the fine pulverized coal particles in a carbon monoxide preparing reaction through reduction is adopted, so that the concentration of materials in the reducing zone is improved; the reduction reaction efficiency in the reducing zone can be promoted; and then the preparation efficiency of gas can be improved.
Description
Technical field
The present invention relates to a kind of producer gas generator and coal gas preparation, relate in particular to a kind of fluidized bed coal gas producer and adopt this equipment to prepare the method for coal gas.
Background technology
Than burning of coal, the burning of coal gas is more clean, efficient, so coal gas is just being subject to paying close attention to more and more widely as a kind of clean energy.The producer gas generator that coal is converted to coal gas mainly can be divided into three major types: fixed bed, fluidized-bed and air flow bed.In actual production process, powder coal gasification is higher than lump coal gasification efficiency, is the main gasification means of research at present and application.
The gasification principle that utilizes fine coal to produce coal gas is the reaction of coal and vaporized chemical, is the reaction of carbon, oxygen and water vapor in essence.In common producer gas generator, fine coal is passed in producer gas generator, and water vapor, air are passed in producer gas generator, then fine coal and vaporized chemical react, main reaction formula comprises the combustion reactions of carbon and oxygen, emits heat energy, shown in (1):
C+O
2→CO
2+Q (1)
Wherein, heat is emitted in "+Q " representative.
Also comprise that carbonic acid gas and water vapor are reduced to the reaction of carbon monoxide and hydrogen by carbon, principal reaction formula is as shown in the formula shown in (2), (3) and (4):
CO
2+C→2CO-Q (2)
H
2O+C→H
2+CO-Q (3)
2H
2O+C→CO
2+2H
2-Q (4)
Wherein, " Q " representative absorbs heat.
The producer gas generator that prior art is used based on above-mentioned principle producing coal in next life gas can be circulating fluidized bed, and as shown in Figure 1, in body of heater 100 walls, region is from bottom to up followed successively by burner hearth 10,20He air guide district, reduction zone 30 to its general structure.Wherein, in the middle and lower part of body of heater 100 sidewalls, be provided with fine coal entrance 110, can claim coal inlet again; In body of heater 100 bottoms, be provided with the first inlet mouth 120, the air inlet for the first time passing into is mainly air and water vapor, can claim vaporized chemical inlet mouth again.The region that in body of heater 100 walls, the space of portion is directly communicated with fine coal entrance 110 and the first inlet mouth 120 is on the lower side exactly burner hearth 10, provides pulverized coal friring required space, and what mainly complete is above-mentioned reaction formula (1).At the middle part of body of heater 100 sidewalls, be provided with the second inlet mouth 130, the air inlet for the second time passing into is water vapor or vaporized chemical, claims again secondary air inlet.Above burner hearth 10, the region being directly communicated with the second inlet mouth 130 is reduction zone 20, provides carbonic acid gas, water vapor and carbon to complete the reaction compartment of above-mentioned reduction reaction formula (2)～(4).Above reduction zone 20, be air guide district 30, the top of body of heater 100 generally connects cyclonic separator 200 by pipeline, will be mingled with the gas mixture of solid particulate, is commonly called as coal gas, is transferred in cyclonic separator 200.The top of cyclonic separator 200 arranges derivation pipeline, the gas mixture separated is derived, and its lower end is drawn and mouthful is connected with body of heater 100 by being arranged on returning of body of heater 100 middle parts, for guiding unreacted solid particulate, be mainly fine coal, be circulated back to burning again in body of heater 100.
Prior art adopts the producer gas generator of said structure, and the defect of its existence is: in reduction zone, pressure is lower, so the molecule of carbonic acid gas, water vapor and carbon is difficult to fully contact to react, causes the reaction efficiency of producer gas generator generally not high.
Summary of the invention
The object of this invention is to provide a kind of producer gas generator and coal gas preparation, with effectively carrying out of promoting to react in producer gas generator, improve gas production efficiency.
For achieving the above object, the embodiment of the present invention provides a kind of producer gas generator, in furnace body wall, comprise successively from bottom to up burner hearth, reduction zone and air guide district, on described burner hearth wall, be provided with fine coal entrance, on the wall of described reduction zone, be provided with the second inlet mouth, it is characterized in that: on the wall of described reduction zone or on the wall of described reduction zone and described burner hearth boundary, be also provided with fines entrance.
Producer gas generator as above, preferably the quantity of described fines entrance is a plurality of, is circumferentially evenly laid on body of heater wall.
Producer gas generator as above, preferably described fines entrance is specially spray gun structure.
Producer gas generator as above, the particle diameter of the pulverized coal particle that preferably described fine coal entrance passes into is less than or equal to 10 millimeters, and the particle diameter of the fines particle that described fines entrance passes into is less than or equal to 0.3 millimeter.
For achieving the above object, the embodiment of the present invention also provides a kind of coal gas preparation, comprising:
To passing into pulverized coal particle in producer gas generator and vaporized chemical burns;
In producer gas generator, pass into fines particle, the substance reaction in described producer gas generator is to obtain carbon monoxide and hydrogen.
Coal gas preparation as above, the particle diameter of the described pulverized coal particle preferably passing into is less than or equal to 10 millimeters, and the particle diameter of the described fines particle passing into is less than or equal to 0.3 millimeter.
Coal gas preparation as above, preferably also comprises: in fines particle passes into the upper direction producer gas generator of position, pass into water vapour or vaporized chemical.
Coal gas preparation as above, is preferably specially to the step that passes into fines particle in producer gas generator: with pulse mode interval, in producer gas generator, spray into fines particle.
Coal gas preparation as above, is preferably specially to the step that passes into fines particle in producer gas generator: in producer gas generator, spray into continuously fines particle.
From above technical scheme, the present invention adopts and on producer gas generator, sets up fines entrance, to pass into the technique means of fines particle in the reaction of carbon monoxide is prepared in reduction, improved the concentration of carbon in reduction zone, improve the reduction reaction efficiency in reduction zone, and then can improve coal gas preparation efficiency.
Below by specific embodiment, also by reference to the accompanying drawings the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of producer gas generator in prior art;
Fig. 2 is the structural representation of producer gas generator specific embodiment of the present invention;
Fig. 3 is the schema of coal gas preparation specific embodiment of the present invention.
In figure:
30-air guide district, 10-burner hearth 20-reduction zone
40-interstitital texture 100-body of heater 110-fine coal entrance
120-first inlet mouth 130-the second inlet mouth 140-air guide port
150-fines entrance 200-cyclonic separator
Embodiment
Producer gas generator embodiment
Be illustrated in figure 2 the structural representation of producer gas generator specific embodiment of the present invention.In body of heater 100 walls of this producer gas generator, comprise successively from bottom to up burner hearth 10,20He air guide district, reduction zone 30.Burner hearth 10 wherein be arranged on body of heater 100 bottoms, for passing into the first inlet mouth 120 of air, be connected, be also connected with the fine coal entrance 110 that is arranged on body of heater 100 middle and lower parts.After passing into pulverized coal particle and vaporized chemical, can in burner hearth 10, carry out combustion reactions.Reduction zone 20 is positioned at the top of burner hearth 10, reduction zone 20 be arranged on body of heater 100 sidewalls middle parts, for passing into the second inlet mouth 130 of water vapor or vaporized chemical, be connected.The carbonic acid gas generating after burning, under warm air and bottom air-flow drive, swim in the coal dust of reduction zone 20 and the water vapor passing into from the second inlet mouth 130 or vaporized chemical and can in reduction zone 20, carry out major ingredient carbon monoxide and the hydrogen that reduction reaction generates coal gas, the gas mixture that then comprises carbon monoxide and hydrogen enters air guide district 30, on the sidewall in body of heater 100 air guide districts 30, be provided with air guide port 140, coal gas can be derived from air guide port 140.Burner hearth 10 in body of heater 100,20He air guide district, reduction zone 30 are not proper division, just with the main reaction occurring in it, divide.On the wall having a common boundary with burner hearth 10 in the interior reduction zone 20 of this gas generator body 100, be also provided with fines entrance 150, between fine coal entrance 120 and the first inlet mouth 110, a fines entrance 150 be set, for passing into fines particle.So-called fines particle, particle diameter is much smaller than the fine coal of pulverized coal particle particle diameter, and the particle diameter of pulverized coal particle is less than or equal to 10 millimeters conventionally, and the particle diameter of fines particle is less than or equal to 0.3 millimeter.
The working process of the present embodiment producer gas generator is: by the first inlet mouth and fine coal entrance, in producer gas generator, pass into respectively vaporized chemical and pulverized coal particle, under pulverized coal particle and the vaporized chemical hot environment in stove, burn; By fines entrance, in producer gas generator, pass into fines particle, and now, by the second inlet mouth, in producer gas generator, pass into water vapor or vaporized chemical.Under this environment, carbonic acid gas and water vapor, generate carbon monoxide and hydrogen with unburned high temperature pulverized coal particle and fines particle generation reduction reaction.In this process, fines particle role is to have increased the concentration of carbon in reduction zone, and the distance between each molecule of reactant is reduced, and the carrying out of accelerated reaction makes to react carry out more abundant, therefore can improve the reaction efficiency of coal gas formation reaction.
In concrete enforcement, the quantity of fines entrance can circumferentially be laid on body of heater wall uniformly for a plurality of, to supply with fines particle equably in reduction zone.
Further, fines entrance can adopt spray gun structure.Fines particle because of its particle diameter little, itself just has sprayable condition.The mode that adopts injection to add can be more conducive to the mixing of fines particle in reduction zone, and can further with elevated pressures, spray into more fines particles, to improve reduction zone internal pressure.
In the present embodiment technical scheme, the object that passes into fines particle is to improve material concentration in reduction zone, so the position of fines entrance is not limited to establish on wall and put between reduction zone and burner hearth, can also be arranged on the wall of reduction zone or on the wall of burner hearth.
Coal gas preparation embodiment
The schema that is illustrated in figure 3 coal gas preparation specific embodiment of the present invention, the method comprises the steps:
Step 1, to passing into pulverized coal particle in the burner hearth of producer gas generator and vaporized chemical burns, vaporized chemical comprises air and water vapour, the vaporized chemical now passing into can be also air;
Step 2, to the reduction zone of producer gas generator or the contiguous position that enters reduction zone pass into fines particle, the substance reaction in producer gas generator is to obtain carbon monoxide and hydrogen;
Can also further perform step 3, in the reduction zone of producer gas generator, pass into water vapor or vaporized chemical, further improve the temperature of reduction zone 20, improve the concentration of carbon simultaneously, what promote reduction reaction generates carbon monoxide and hydrogen, then derives.
The coal gas preparation of the present embodiment can adopt producer gas generator of the present invention to complete.The particle diameter of the pulverized coal particle passing into is generally less than or equals 10 millimeters, and the particle diameter of the fines particle passing into is generally less than or equals 0.3 millimeter.
In the mode passing at fines particle and water vapour or vaporized chemical, can pass in the lump also and can pass into respectively, for example in producer gas generator, pass into fines particle, in fines particle passes into the upper direction producer gas generator of position, pass into water vapour or vaporized chemical.Passing in order, for the producer gas generator of continuously feeding, burning, reduction, derivation carbon monoxide, passing into of fines particle and water vapour sequentially do not have dividing of the priority of stricti jurise.
In concrete enforcement, preferably adopt spray gun in producer gas generator, to spray into fines particle with pulse mode interval, or also can adopt spray gun to spray into continuously fines particle in producer gas generator.
The technical scheme of the present embodiment, by pass into fines particle in reduction zone, can increase the concentration of material in reduction zone, distance between each molecule of reactant is reduced, accelerated the carrying out of reaction, make to react carry out more abundant, therefore can improve the speed of reaction of gas mixture formation reaction.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a producer gas generator, in furnace body wall, comprise successively from bottom to up burner hearth, reduction zone and air guide district, on described burner hearth wall, be provided with fine coal entrance, on the wall of described reduction zone, be provided with the second inlet mouth, it is characterized in that: on the wall of described reduction zone or on the wall of described reduction zone and described burner hearth boundary, be also provided with fines entrance.
2. producer gas generator according to claim 1, is characterized in that: the quantity of described fines entrance is a plurality of, is circumferentially evenly laid on body of heater wall.
3. producer gas generator according to claim 1 and 2, is characterized in that: described fines entrance is specially spray gun structure.
4. producer gas generator according to claim 1 and 2, is characterized in that: the particle diameter of the pulverized coal particle that described fine coal entrance passes into is less than or equal to 10 millimeters, and the particle diameter of the fines particle that described fines entrance passes into is less than or equal to 0.3 millimeter.
5. a coal gas preparation, is characterized in that comprising:
In the furnace body wall of producer gas generator, comprise successively from bottom to up burner hearth, reduction zone and air guide district, on described burner hearth wall, be provided with fine coal entrance, on the wall of described reduction zone, be provided with the second inlet mouth, on the wall of described reduction zone or on the wall of described reduction zone and described burner hearth boundary, be also provided with fines entrance
By described fine coal entrance and described the second inlet mouth to passing into pulverized coal particle in producer gas generator and vaporized chemical burns;
By described fines entrance, to producer gas generator, pass into fines particle, the substance reaction in described producer gas generator is to obtain carbon monoxide and hydrogen.
6. coal gas preparation according to claim 5, is characterized in that: the particle diameter of the described pulverized coal particle passing into is less than or equal to 10 millimeters, and the particle diameter of the described fines particle passing into is less than or equal to 0.3 millimeter.
7. according to the coal gas preparation described in claim 5 or 6, it is characterized in that, also comprise: in fines particle passes into the upper direction producer gas generator of position, pass into vaporized chemical.
8. according to the coal gas preparation described in claim 5 or 6, it is characterized in that, to the step that passes into fines particle in producer gas generator, be specially: with pulse mode interval, in producer gas generator, spray into fines particle.
9. according to the coal gas preparation described in claim 5 or 6, it is characterized in that, to the step that passes into fines particle in producer gas generator, be specially: in producer gas generator, spray into continuously fines particle.
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|---|---|---|---|
| CN201010109510.4A CN101987975B (en) | 2010-02-10 | 2010-02-10 | Gas producer and gas preparation method |
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|---|---|---|---|
| CN201010109510.4A CN101987975B (en) | 2010-02-10 | 2010-02-10 | Gas producer and gas preparation method |
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|---|---|
| CN101987975A CN101987975A (en) | 2011-03-23 |
| CN101987975B true CN101987975B (en) | 2014-08-20 |
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| CN108951367A (en) * | 2018-09-04 | 2018-12-07 | 中交公局海威工程建设有限公司 | A kind of method that asphalt mixing plant coal changes gas heating |
| CN113072979B (en) * | 2021-03-30 | 2022-06-24 | 新奥科技发展有限公司 | Coal gasification furnace and method for coal gasification |
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| CN101063053B (en) * | 2007-05-14 | 2010-05-26 | 广东科达机电股份有限公司 | Circulating fluidized bed gas generator system |
| CN201704293U (en) * | 2010-02-10 | 2011-01-12 | 马鞍山科达洁能有限公司 | Gas producer |
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Address after: 243041 Anhui city in Ma'anshan province north of the revitalization of economic and Technological Development Zone, Road No. 555 Applicant after: KEDA INDUSTRIAL CO., LTD. Address before: 243041 Anhui city in Ma'anshan province north of the revitalization of economic and Technological Development Zone, Road No. 555 Applicant before: Ma'anshan Keda Clean Energy Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: MA'ANSHAN KEDA CLEAN ENERGY CO., LTD. TO: KEDA CLEAN ENERGY (MA'ANSHAN) CO., LTD. |
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Denomination of invention: Gas producer and gas preparation method Effective date of registration: 20190729 Granted publication date: 20140820 Pledgee: China Co truction Bank Corp Ma'anshan branch Pledgor: KEDA INDUSTRIAL CO., LTD. Registration number: 2019340000426 |