CN101475839A - Coupling fixed bed oxygen-enriched continuous gasification process - Google Patents
Coupling fixed bed oxygen-enriched continuous gasification process Download PDFInfo
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Abstract
The invention discloses oxygen-rich continuous gasification technology for a coupled fixed bed, wherein a solid raw material comprises coal or coke, and a gas raw material comprises oxygen, air and steam; and the oxygen can be mixed with the air into oxygen-rich air first and then is sent into a gas-making furnace, and can also be sent into the gas-making furnace in the form of single gas. The technology is characterized in that the gas-making furnace is that two common gas furnace bodies (A and B) are connected into a whole by a pipeline and a valve, two furnaces alternately upward blow to make gas, and the gas raw material can also comprise carbon dioxide; and the gas-making process comprises the step of the blowing-off of the A and B furnaces, the step of upward blowing of the A furnace, the step of secondary blowing-off of the A and B furnaces, and the step of upward blowing of the B furnace, and the steps are circulated. The gas-making furnace is that the two common gas furnace bodies are connected into a whole by the pipeline and the valve, and the two furnaces alternately upward blow to make gas, so the technology can optimize the distribution of temperature fields in the gas furnaces, reduce the sensible heat loss of semiwater gas, the erosion to pipelines in subsequent working procedures, and the quantity of carry-overs, improve the condition of gas quality, and reduce gas consumption and coal consumption.
Description
Technical field
The present invention relates to the coal gasifying process technical field, relate in particular to the fixed bed oxygen-enriched continuous gasification process technical field.
Background technology
Gasification is the important step of producing synthetic ammonia and fuel gas (semi-water gas and water-gas), is the core technology of development Coal Chemical Industry.Industrial production semi-water gas is mainly by following reaction: at first airborne oxygen and carbon reaction generate carbon monoxide, carbonic acid gas, emit heat; Secondly steam in the boiler and red-hot carbon reaction generation carbon monoxide, carbonic acid gas and hydrogen absorb heat.Resultant by above-mentioned reaction has neither part nor lot in reaction in air nitrogen constitutes the main component of semi-water gas.
At present, the static bed coal gasification technology that industrial tradition adopts is to be the intermittent gasification technology of vaporized chemical with air and steam, its technical process comprise blowing → on blow → descend to blow → blow → blow off five stages on the secondary.The blowing stage is blown into air by gas blower and reacts at zone of combustion and coal, the emptying behind dedusting, recovery heat of the blowing air of generation; On blow the stage, steam enters fuel bed from the gas furnace lower curtate, the higher coal gas of the temperature of generation enters gas holder behind dedusting, recovery waste heat, gas washing; Under blow the stage, steam enters from the gas furnace top, generates the lower coal gas of temperature, directly enters gas holder behind the gas washing; Blow the stage on the secondary, with on the process of blowing consistent, but the time is shorter, purpose is that the coal gas with furnace bottom remnants purges clean; Blow off the stage, by air with coal-gas recovering residual in gas furnace top and the pipeline to gas holder, so circulation.Adopt this gasifying process to realize producing of semi-water gas, have the following disadvantages:
1, blow strength is big, and carry-over is many, and coal utilization efficient is low, and ton ammonia coal consumption entering furnace is the 1.6-2.2 ton, and single stove gas deliverability is low.
2, contain carbon monoxide, carbonic acid gas and sulfurous gas, contaminate environment in the blowing air.
3, technology falls behind, and is the Coal Gasification Technology of national explicit order restriction.
For this reason, it is the fixed bed oxygen-enriched continuous gasification process of vaporized chemical that people have invented with oxygen-rich air and steam, its technical process is: oxygen concn is 50～60% oxygen-rich air with after steam mixes by certain steam oxygen ratio, enters the unidirectional blowing gas of going up continuously from furnace bottom.
For example, disclosing a kind of in going up the article that is entitled as " moulded coal+omnibus control system+oxygen-enriched continuous gasification combination and prospect thereof " of outstanding young tiger of signature in " middle nitrogenous fertilizer " second phase in March, 2008 is the oxygen-enriched continuous gasification process of vaporized chemical with oxygen-rich air and steam: oxygen and air mixed become to contain the oxygen-rich air of oxygen rate 40%～60%, after the pressurization of oxygen enriched blast machine, enter mixing tank and carry out thorough mixing with steam again, be sent to producer gas generator bottom then, blow the mixed gas of oxygen-rich air and steam on continuously and produce semi-water gas.Adopt this technology to produce semi-water gas, it is little that the stove air flow quantity is gone into by unit, and it is stable also to have bed temperature simultaneously, the consumption coal facies to less, easy to operate, pollute relatively little advantage, present this technology is progressively replacing traditional coal gasifying process.But also there is deficiency in this technology, mainly shows as:
1, the unidirectional blowing gas of going up, the sensible heat of the unidirectional from top to bottom variation of thermograde, semi-water gas that temperature is high can't be recycled, the semi-water gas temperature causes sensible heat to lose in a large number up to 550～650 ℃, and the pyritous semi-water gas also can cause the serious erosion of subsequent handling pipeline.
2, ton ammonia coal consumption 1.5～1.6t, oxygen consumption 450～600 standard cubic meter, steam consumption 2.5t, raw material availability is also lower, and is economical not enough.
3, carbon dioxide content causes effective component content to have only 62～68% up to 18～23% in the semi-water gas.
Summary of the invention
For overcoming the deficiency of existing fixed bed oxygen-enriched continuous gasification process, the invention provides a kind of distribution of optimizing the coal gas temperature field in furnace, reduce the semi-water gas sensible heat loss, reduce erosion to the subsequent handling pipeline, reduce carry-over quantity, improve the makings situation, reduce the coupling type fixed bed oxygen-enriched continuous gasification process of gas consumption and coal consumption.
The present invention reaches the technical scheme that above purpose adopts to be: coupling fixed bed oxygen-enriched continuous gasification process, and gas making comprises coal or coke with solid material, gas making comprises oxygen, air, steam with gas raw material; Oxygen can be to send into Gas-making Furnace with the form of mixed gas after being mixed into oxygen-rich air earlier with air, the form that also can be used as pure gas is sent into Gas-making Furnace, it is characterized in that: Gas-making Furnace is that logical gas furnace body and function pipeline of first, second two Daeporis and valve connection are one group, first, second two stoves blow gas making on replacing, and gas making also can comprise carbonic acid gas with gas raw material; The gas making process may further comprise the steps:
A, first, second two stoves blow off step;
Blow step on b, the first stove;
C, first, second two stove secondaries blow off step;
Blow step on d, the second stove;
Above step cycle.
Its technological process can be earlier oxygen to be become oxygen-rich air with air mixed, is blown into oxygen-rich air and steam is produced semi-water gas; Described gas making process may further comprise the steps:
A, steam purge step, two gas furnace bottoms of first, second are blown into steam simultaneously, utilize the steam that is blown into that the oxygen-rich air in the stove is blown off, and the gas of producing by boasting is sent from two furnace roof portions;
Blow step on b, the first stove mixed gas, be blown into the mixed gas of oxygen-rich air and steam from the first furnace bottom, the gas that comes out is blown into from second furnace roof portion, sends from the second furnace bottom;
C, secondary steam blow off step, and first, second two furnace bottoms are blown into steam simultaneously, utilize the steam that is blown into that the oxygen-rich air in the stove is blown off, and the gas of producing by boasting is sent from two furnace roof portions;
Blow step on d, the second stove mixed gas, be blown into the mixed gas of oxygen-rich air and steam from the second furnace bottom, the gas that comes out is blown into from first furnace roof portion, sends from the first furnace bottom;
Above step cycle.
Described Gas-making Furnace comprises the gas furnace that first, second two Daeporis are logical, and the first furnace bottom is connected with oxygen-rich air valve first, steam valve first, gas valve first, and the second furnace bottom is connected with oxygen-rich air valve second, steam valve second, gas valve second; First stove and second furnace roof portion air outlet are connected gas valve the third after with the pipeline parallel connection, and gas valve third other end is communicated with by four-way connection with the other end of gas valve first and gas valve second, and the other end of four-way connection connects output channel.
Solid material can be a coke, and the gas raw material that is blown into Gas-making Furnace comprises oxygen and carbonic acid gas; The gas making process may further comprise the steps:
A, carbonic acid gas blow off step, and two gas furnace bottoms of first, second are blown into carbonic acid gas simultaneously, utilize the carbonic acid gas that is blown into that the oxygen in the stove is blown off, and the gas of producing by boasting is sent from two furnace roof portions;
Blow step on b, the first stove oxygen, be blown into oxygen from the first furnace bottom, the gas that comes out is blown into from second furnace roof portion, sends from the second furnace bottom;
C, carbonic acid gas secondary blow off step, and first, second two furnace bottoms are blown into carbonic acid gas simultaneously, utilize the carbonic acid gas that is blown into that the oxygen in the stove is blown off, and the gas of producing by boasting is sent from two furnace roof portions;
Blow step on d, the second stove oxygen, be blown into oxygen from the second furnace bottom, the gas that comes out is blown into from first furnace roof portion, sends from the first furnace bottom;
Above step cycle.
Described Gas-making Furnace comprises the gas furnace that first, second two Daeporis are logical, and the first furnace bottom is connected with oxygen valve first, carbonic acid gas valve first, gas valve first, and the second furnace bottom is connected with oxygen valve second, carbonic acid gas valve second, gas valve second; First stove and second furnace roof portion air outlet are connected gas valve the third after with the pipeline parallel connection, and gas valve third other end is communicated with by four-way connection with the other end of gas valve first and gas valve second, and the other end of four-way connection connects output channel.
Be 120 seconds the cycling time of described gas making process, and oxygen concn is 60% in the oxygen-rich air, and the oxygen-rich air normal flow is 4000m
2/ h, the state flow of steam is 6t/h; The gas making process may further comprise the steps:
A, steam purge step; 5 seconds time, steam valve first, steam valve second, gas valve third are opened simultaneously; Oxygen-rich air first, oxygen-rich air valve second, gas valve first, gas valve second are in closing condition in this time period; Puff away and be sent to gas holder through gas valve third;
Blow step on b, the first stove oxygen-rich air, 55 seconds time, oxygen-rich air valve first, gas valve second is opened simultaneously; Steam valve first, steam valve second, gas valve third, oxygen-rich air valve second, gas valve first are in closing condition in this time period; The coal gas that blows generation on the first stove enters from second stove furnace roof by the gas line between first and second stoves, through the preheating of second stove carbon-coating, and further reaction in second stove fire layer, the gas valve second of the coal gas that is produced on the second stove is sent to gas holder;
C, secondary steam blow off step, and 5 seconds time, steam valve first, steam valve second, gas valve third are opened simultaneously; Oxygen-rich air valve first, oxygen-rich air valve second, gas valve first, gas valve second are in closing condition in this time period; Puff away and be sent to gas holder through gas valve third;
Blow step on d, the second stove oxygen-rich air, 55 seconds time, oxygen-rich air valve second, gas valve first are opened simultaneously; Steam valve first, steam valve second, gas valve third, oxygen-rich air valve first, gas valve second are in closing condition in this time period; The coal gas that blows generation on the second stove enters from first stove furnace roof by the gas line between first and second stoves, through the preheating of first stove carbon-coating, and further reaction in first stove fire layer, the gas valve first of the coal gas that is produced on the first stove is sent to gas holder;
Above step cycle.
Be 120 seconds the cycling time of described gas making process, and oxygen concn is 50% in the oxygen-rich air, and the oxygen-rich air normal flow is 5000m
3/ h, steam condition flow are 6t/h; The gas making process may further comprise the steps:
A, steam purge step; 5 seconds time, steam valve first, steam valve second, gas valve third are opened simultaneously; Oxygen-rich air first, oxygen-rich air second, gas valve first, gas valve second are in closing condition in this time period; Puff away and be sent to gas holder through gas valve third;
Blow step on b, the first stove oxygen-rich air, 55 seconds time, oxygen-rich air valve first, gas valve second is opened simultaneously; Steam valve first, steam valve second, gas valve third, oxygen-rich air valve second, gas valve first are in closing condition in this time period; The coal gas that blows generation on the first stove enters from second stove furnace roof by the gas line between first and second stoves, through the preheating of second stove carbon-coating, and further reaction in second stove fire layer, the gas valve second of the coal gas that is produced on the second stove is sent to gas holder;
C, secondary steam blow off step, and 5 seconds time, steam valve first, steam valve second, gas valve third are opened simultaneously; Oxygen-rich air valve first, oxygen-rich air valve second, gas valve first, gas valve second are in closing condition in this time period; Puff away and be sent to gas holder through gas valve third;
Blow step on d, the second stove oxygen-rich air, 55 seconds time, oxygen-rich air valve second, gas valve first are opened simultaneously; Steam valve first, steam valve second, gas valve third, oxygen-rich air valve first, gas valve second are in closing condition in this time period; The coal gas that blows generation on the second stove enters from first stove furnace roof by the gas line between first and second stoves, through the preheating of first stove carbon-coating, and further reaction in first stove fire layer, the gas valve first of the coal gas that is produced on the first stove is sent to gas holder;
Above step cycle.
Gas-making Furnace is interior to be raw material with the coke, and be 120 seconds the cycling time of described gas making process, and oxygen concn is 99.5%, and the oxygen normal flow is 2500m
3/ h, carbonic acid gas normal flow are 6000m
3/ h, the gas making process may further comprise the steps:
A, carbonic acid gas blow off step; 5 seconds time, carbonic acid gas valve first, carbonic acid gas valve second, gas valve third are opened simultaneously; Oxygen valve first, oxygen valve second, gas valve first, gas valve second are in closing condition in this time period; Puff away and be sent to gas holder through gas valve third;
Blow step on b, the first stove oxygen, 55 seconds time, oxygen valve first, gas valve second is opened simultaneously; Carbonic acid gas valve first, carbonic acid gas valve second, gas valve third, oxygen valve second, gas valve first are in closing condition in this time period; The coal gas that blows generation on the first stove enters from second stove furnace roof by the gas line between first and second stoves, through the preheating of second stove carbon-coating, and further reaction in second stove fire layer, the gas valve second of the coal gas that is produced on the second stove is sent to gas holder;
C, carbonic acid gas secondary blow off step, and 5 seconds time, carbonic acid gas valve first, carbonic acid gas valve second, gas valve third are opened simultaneously; Oxygen valve first, oxygen valve second, gas valve first, gas valve second are in closing condition in this time period; Puff away and be sent to gas holder through gas valve third;
Blow step on d, the second stove oxygen, 55 seconds time, oxygen valve second, gas valve first are opened simultaneously; Carbonic acid gas valve first, carbonic acid gas valve second, gas valve third, oxygen valve first, gas valve second are in closing condition in this time period; The coal gas that blows generation on the second stove enters from first stove furnace roof by the gas line between first and second stoves, through the preheating of first stove carbon-coating, and further reaction in first stove fire layer, the gas valve first of the coal gas that is produced on the first stove is sent to gas holder;
Above step cycle.
The invention has the beneficial effects as follows: because Gas-making Furnace is that logical gas furnace body and function pipeline of first, second two Daeporis and valve connection are one group, first, second two stoves blow gas making on replacing, and therefore can accomplish:
1, optimizes the distribution of coal gas temperature field in furnace, the semi-water gas temperature is descended, reduce the semi-water gas sensible heat loss, reduce the erosion of semi-water gas simultaneously the subsequent handling pipeline.
2, significantly reduce the quantity and the loss of carry-over, on blow gas carry-over when entering second stove, filtered and further burning and being fully used in fire bed by carbon-coating.
3, blow the unreacted steam of gas on and return further reaction in the layer by the carbon-coating preheating and at fire in through second stove time, steam decomposition rate is improved, steam consumption descends significantly.
4, blow the carbonic acid gas of gas generation higher concentration on.Through second stove time, further react the generation carbonic acid gas by the carbon-coating preheating and in fire bed, thereby make finally carbonic acid gas in coal gas.Content significantly reduce, improve the makings situation.
5, the methane that produces of first stove and second stove reaction all is decomposed into carbonic acid gas and hydrogen during by fire bed at secondary.Become effective constituent, improve makings, reduce coal consumption.
6, because the reduction of final gas temperature all can descend oxygen consumption and coal consumption significantly.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.Wherein:
Fig. 1 is the synoptic diagram of first and second kinds of embodiment of the present invention;
Fig. 2 is the synoptic diagram of the third embodiment of the present invention.
Marker number in the accompanying drawing is described as follows: oxygen-rich air valve first 1, oxygen-rich air valve second 2, steam valve first 3, steam valve second 4, gas valve first 5, gas valve second 6, gas valve the third 7, oxygen valve first 8, oxygen valve second 9, carbonic acid gas valve first 10, carbonic acid gas valve second 11.
Embodiment
First kind of embodiment of the present invention, as shown in Figure 1, coupling fixed bed oxygen-enriched continuous gasification process, solid material are coals, its technological process is earlier oxygen to be become oxygen-rich air with air mixed, is blown into oxygen-rich air and steam is produced semi-water gas; Gas-making Furnace comprises the gas furnace that first, second two Daeporis are logical, and the first furnace bottom is connected with oxygen-rich air valve first 1, steam valve first 3, gas valve first 5, and the second furnace bottom is connected with oxygen-rich air valve second 2, steam valve second 4, gas valve second 6; First stove and second furnace roof portion air outlet are connected gas valve the third 7 after with the pipeline parallel connection, and gas valve the third 7 other ends are communicated with by four-way connection with the other end of gas valve first 5 and gas valve second 6, and the other end of four-way connection connects output channel.
Be 120 seconds the cycling time of gas making process, and oxygen concn is 60% in the oxygen-rich air, and the oxygen-rich air normal flow is 4000m
3/ h, the state flow of steam is 6t/h; The gas making process may further comprise the steps:
A, steam purge step; 5 seconds time, steam valve first 3, steam valve second 4, gas valve the third 7 opened simultaneously; Oxygen-rich air valve first 1, oxygen-rich air valve second 2, gas valve first 5, gas valve second 6 are in closing condition in this time period; Puff away and be sent to gas holder through gas valve the third 7;
Blow step on b, the first stove oxygen-rich air, 55 seconds time, oxygen-rich air valve first 1, gas valve second 6 are opened simultaneously; Steam valve first 3 in this time period, steam valve second 4, gas valve the third 7, oxygen-rich air valve second 2, gas valve first 5 are in closing condition; The coal gas that blows generation on the first stove enters from second stove furnace roof by the gas line between first and second stoves, through the preheating of second stove carbon-coating, and further reaction in second stove fire layer, the gas valve second 6 of the coal gas that is produced on the second stove is sent to gas holder;
C, secondary steam blow off step, and 5 seconds time, steam valve first 3, steam valve second 4, gas valve the third 7 opened simultaneously; Oxygen-rich air valve first 1, oxygen-rich air valve second 2, gas valve first 5, gas valve second 6 are in closing condition in this time period; Puff away and be sent to gas holder through gas valve the third 7;
Blow step on d, the second stove oxygen-rich air, 55 seconds time, oxygen-rich air valve second 2, gas valve first 5 are opened simultaneously; Steam valve first 3 in this time period, steam valve second 4, gas valve the third 7, oxygen-rich air valve first 1, gas valve second 6 are in closing condition; The coal gas that blows generation on the second stove enters from first stove furnace roof by the gas line between first and second stoves, through the preheating of first stove carbon-coating, and further reaction in first stove fire layer, the gas valve first 5 of the coal gas that is produced on the first stove is sent to gas holder;
Above step cycle.
Second kind of embodiment of the present invention, as shown in Figure 1, coupling fixed bed oxygen-enriched continuous gasification process,
Be 120 seconds the cycling time of described gas making process, and oxygen concn is 50% in the oxygen-rich air, and the oxygen-rich air normal flow is 5000m
3/ h, steam consumption 6t/h; All the other conditions and step and first kind of embodiment are identical.
The third embodiment of the present invention, as shown in Figure 2, coupling fixed bed oxygen-enriched continuous gasification process, its technological process is: solid material is a coke, the gas raw material that is blown into Gas-making Furnace comprises oxygen and carbonic acid gas; Gas-making Furnace comprises the gas furnace that first, second two Daeporis are logical, and the first furnace bottom is connected with oxygen valve first 8, carbonic acid gas valve first 10, gas valve first 5, and the second furnace bottom is connected with oxygen valve second 9, carbonic acid gas valve second 11, gas valve second 6; First stove and second furnace roof portion air outlet are connected gas valve the third 7 after with the pipeline parallel connection, and gas valve the third 7 other ends are communicated with by four-way connection with the other end of gas valve first 5 and gas valve second 6, and the other end of four-way connection connects output channel.Gas-making Furnace is interior to be raw material with the coke, and be 120 seconds the cycling time of described gas making process, and oxygen concn is 99.5%, and the oxygen normal flow is 2500m
3/ h, carbonic acid gas normal flow are 6000m
2/ h, the gas making process may further comprise the steps:
A, carbonic acid gas blow off step, and 5 seconds time, carbonic acid gas valve first 10, carbonic acid gas valve second 11, gas valve the third 7 opened simultaneously; Oxygen valve first 8, oxygen valve second 9, gas valve first 5, gas valve second 6 are in closing condition in this time period; Puff away and be sent to gas holder through gas valve the third 7;
Blow step on b, the first stove oxygen, 55 seconds time, oxygen valve first 8, gas valve second 6 are opened simultaneously; Carbonic acid gas valve first 10 in this time period, carbonic acid gas valve second 11, gas valve the third 7, oxygen valve second 9, gas valve first 5 are in closing condition; The coal gas that blows generation on the first stove enters from second stove furnace roof by the gas line between first and second stoves, through the preheating of second stove carbon-coating, and further reaction in second stove fire layer, the gas valve second 6 of the coal gas that is produced on the second stove is sent to gas holder;
C, carbonic acid gas secondary blow off step, and 5 seconds time, carbonic acid gas valve first 10, carbonic acid gas valve second 11, gas valve the third 7 opened simultaneously; Oxygen valve first 8, oxygen valve second 9, gas valve first 5, gas valve second 6 are in closing condition in this time period; Puff away and be sent to gas holder through gas valve the third 7;
Blow step on d, the second stove oxygen, 55 seconds time, oxygen valve second 9, gas valve first 5 are opened simultaneously; Carbonic acid gas valve first 10 in this time period, carbonic acid gas valve second 11, gas valve the third 7, oxygen valve first 8, gas valve second 6 are in closing condition; The coal gas that blows generation on the second stove enters from first stove furnace roof by the gas line between first and second stoves, through the preheating of first stove carbon-coating, and further reaction in first stove fire layer, the gas valve first 5 of the coal gas that is produced on the first stove is sent to gas holder;
Above step cycle.
Certainly; more than in the flux values, oxygen-rich air of each of value, each step time apportioning cost, all gases among each embodiment cycling time oxygen concn value, oxygen density value all be reference value; allow the change of appropriateness in the enforcement; this can't fundamentally influence effect of the present invention; therefore; only above numerical value is made the various technologies that appropriateness changes, all should drop in protection scope of the present invention.
Claims (8)
1, coupling fixed bed oxygen-enriched continuous gasification process, gas making comprises coal or coke with solid material, gas making comprises oxygen, air, steam with gas raw material; Oxygen can be to send into Gas-making Furnace with the form of mixed gas after being mixed into oxygen-rich air earlier with air, the form that also can be used as pure gas is sent into Gas-making Furnace, it is characterized in that: Gas-making Furnace is that logical gas furnace body and function pipeline of first, second two Daeporis and valve connection are one group, first, second two stoves blow gas making on replacing, and gas making also can comprise carbonic acid gas with gas raw material; The gas making process may further comprise the steps:
A, first, second two stoves blow off step;
Blow step on b, the first stove;
C, first, second two stove secondaries blow off step;
Blow step on d, the second stove;
Above step cycle.
2, coupling fixed bed oxygen-enriched continuous gasification process according to claim 1 is characterized in that: its technological process is earlier oxygen to be become oxygen-rich air with air mixed, is blown into oxygen-rich air and steam is produced semi-water gas; Described gas making process may further comprise the steps:
A, steam purge step, two gas furnace bottoms of first, second are blown into steam simultaneously, utilize the steam that is blown into that the oxygen-rich air in the stove is blown off, and the gas of producing by boasting is sent from two furnace roof portions;
Blow step on b, the first stove mixed gas, be blown into the mixed gas of oxygen-rich air and steam from the first furnace bottom, the gas that comes out is blown into from second furnace roof portion, sends from the second furnace bottom;
C, secondary steam blow off step, and first, second two furnace bottoms are blown into steam simultaneously, utilize the steam that is blown into that the oxygen-rich air in the stove is blown off, and the gas of producing by boasting is sent from two furnace roof portions;
Blow step on d, the second stove mixed gas, be blown into the mixed gas of oxygen-rich air and steam from the second furnace bottom, the gas that comes out is blown into from first furnace roof portion, sends from the first furnace bottom;
Above step cycle.
3, coupling fixed bed oxygen-enriched continuous gasification process according to claim 1 and 2, it is characterized in that: described Gas-making Furnace comprises the gas furnace that first, second two Daeporis are logical, the first furnace bottom is connected with oxygen-rich air valve first, steam valve first, gas valve first, and the second furnace bottom is connected with oxygen-rich air valve second, steam valve second, gas valve second; First stove and second furnace roof portion air outlet are connected gas valve the third after with the pipeline parallel connection, and gas valve third other end is communicated with by four-way connection with the other end of gas valve first and gas valve second, and the other end of four-way connection connects output channel.
4, coupling fixed bed oxygen-enriched continuous gasification process according to claim 1 is characterized in that: solid material is a coke, and the gas raw material that is blown into Gas-making Furnace comprises oxygen and carbonic acid gas; The gas making process may further comprise the steps:
A, carbonic acid gas blow off step, and two gas furnace bottoms of first, second are blown into carbonic acid gas simultaneously, utilize the carbonic acid gas that is blown into that the oxygen in the stove is blown off, and the gas of producing by boasting is sent from two furnace roof portions;
Blow step on b, the first stove oxygen, be blown into oxygen from the first furnace bottom, the gas that comes out is blown into from second furnace roof portion, sends from the second furnace bottom;
C, carbonic acid gas secondary blow off step, and first, second two furnace bottoms are blown into carbonic acid gas simultaneously, utilize the carbonic acid gas that is blown into that the oxygen in the stove is blown off, and the gas of producing by boasting is sent from two furnace roof portions;
Blow step on d, the second stove oxygen, be blown into oxygen from the second furnace bottom, the gas that comes out is blown into from first furnace roof portion, sends from the first furnace bottom;
Above step cycle.
5, according to claim 1 or 4 described coupling fixed bed oxygen-enriched continuous gasification process, it is characterized in that: described Gas-making Furnace comprises the gas furnace that first, second two Daeporis are logical, the first furnace bottom is connected with oxygen valve first, carbonic acid gas valve first, gas valve first, and the second furnace bottom is connected with oxygen valve second, carbonic acid gas valve second, gas valve second; First stove and second furnace roof portion air outlet are connected gas valve the third after with the pipeline parallel connection, and gas valve third other end is communicated with by four-way connection with the other end of gas valve first and gas valve second, and the other end of four-way connection connects output channel.
6, coupling fixed bed oxygen-enriched continuous gasification process according to claim 3 is characterized in that: be 120 seconds the cycling time of described gas making process, and oxygen concn is 60% in the oxygen-rich air, and the oxygen-rich air normal flow is 4000m
3/ h, the state flow of steam is 6t/h; The gas making process may further comprise the steps:
A, steam purge step; 5 seconds time, steam valve first, steam valve second, gas valve third are opened simultaneously; Oxygen-rich air first, oxygen-rich air valve second, gas valve first, gas valve second are in closing condition in this time period; Puff away and be sent to gas holder through gas valve third;
Blow step on b, the first stove oxygen-rich air, 55 seconds time, oxygen-rich air valve first, gas valve second is opened simultaneously; Steam valve first, steam valve second, gas valve third, oxygen-rich air valve second, gas valve first are in closing condition in this time period; The coal gas that blows generation on the first stove enters from second stove furnace roof by the gas line between first and second stoves, through the preheating of second stove carbon-coating, and further reaction in second stove fire layer, the gas valve second of the coal gas that is produced on the second stove is sent to gas holder;
C, secondary steam blow off step, and 5 seconds time, steam valve first, steam valve second, gas valve third are opened simultaneously; Oxygen-rich air valve first, oxygen-rich air valve second, gas valve first, gas valve second are in closing condition in this time period; Puff away and be sent to gas holder through gas valve third;
Blow step on d, the second stove oxygen-rich air, 55 seconds time, oxygen-rich air valve second, gas valve first are opened simultaneously; Steam valve first, steam valve second, gas valve third, oxygen-rich air valve first, gas valve second are in closing condition in this time period; The coal gas that blows generation on the second stove enters from first stove furnace roof by the gas line between first and second stoves, through the preheating of first stove carbon-coating, and further reaction in first stove fire layer, the gas valve first of the coal gas that is produced on the first stove is sent to gas holder;
Above step cycle.
7, coupling fixed bed oxygen-enriched continuous gasification process according to claim 3 is characterized in that: be 120 seconds the cycling time of described gas making process, and oxygen concn is 50% in the oxygen-rich air, and the oxygen-rich air normal flow is 5000m
3/ h, steam condition flow are 6t/h; The gas making process may further comprise the steps:
A, steam purge step; 5 seconds time, steam valve first, steam valve second, gas valve third are opened simultaneously; Oxygen-rich air first, oxygen-rich air second, gas valve first, gas valve second are in closing condition in this time period; Puff away and be sent to gas holder through gas valve third;
Blow step on b, the first stove oxygen-rich air, 55 seconds time, oxygen-rich air valve first, gas valve second is opened simultaneously; Steam valve first, steam valve second, gas valve third, oxygen-rich air valve second, gas valve first are in closing condition in this time period; The coal gas that blows generation on the first stove enters from second stove furnace roof by the gas line between first and second stoves, through the preheating of second stove carbon-coating, and further reaction in second stove fire layer, the gas valve second of the coal gas that is produced on the second stove is sent to gas holder;
C, secondary steam blow off step, and 5 seconds time, steam valve first, steam valve second, gas valve third are opened simultaneously; Oxygen-rich air valve first, oxygen-rich air valve second, gas valve first, gas valve second are in closing condition in this time period; Puff away and be sent to gas holder through gas valve third;
Blow step on d, the second stove oxygen-rich air, 55 seconds time, oxygen-rich air valve second, gas valve first are opened simultaneously; Steam valve first, steam valve second, gas valve third, oxygen-rich air valve first, gas valve second are in closing condition in this time period; The coal gas that blows generation on the second stove enters from first stove furnace roof by the gas line between first and second stoves, through the preheating of first stove carbon-coating, and further reaction in first stove fire layer, the gas valve first of the coal gas that is produced on the first stove is sent to gas holder;
Above step cycle.
8, coupling fixed bed oxygen-enriched continuous gasification process according to claim 5 is characterized in that: Gas-making Furnace is interior to be raw material with the coke, and be 120 seconds the cycling time of described gas making process, and oxygen concn is 99.5%, and the oxygen normal flow is 2500m
3/ h, carbonic acid gas normal flow are 6000m
3/ h, the gas making process may further comprise the steps:
A, carbonic acid gas blow off step; 5 seconds time, carbonic acid gas valve first, carbonic acid gas valve second, gas valve third are opened simultaneously; Oxygen valve first, oxygen valve second, gas valve first, gas valve second are in closing condition in this time period; Puff away and be sent to gas holder through gas valve third;
Blow step on b, the first stove oxygen, 55 seconds time, oxygen valve first, gas valve second is opened simultaneously; Carbonic acid gas valve first, carbonic acid gas valve second, gas valve third, oxygen valve second, gas valve first are in closing condition in this time period; The coal gas that blows generation on the first stove enters from second stove furnace roof by the gas line between first and second stoves, through the preheating of second stove carbon-coating, and further reaction in second stove fire layer, the gas valve second of the coal gas that is produced on the second stove is sent to gas holder;
C, carbonic acid gas secondary blow off step, and 5 seconds time, carbonic acid gas valve first, carbonic acid gas valve second, gas valve third are opened simultaneously; Oxygen valve first, oxygen valve second, gas valve first, gas valve second are in closing condition in this time period; Puff away and be sent to gas holder through gas valve third;
Blow step on d, the second stove oxygen, 55 seconds time, oxygen valve second, gas valve first are opened simultaneously; Carbonic acid gas valve first, carbonic acid gas valve second, gas valve third, oxygen valve first, gas valve second are in closing condition in this time period; The coal gas that blows generation on the second stove enters from first stove furnace roof by the gas line between first and second stoves, through the preheating of first stove carbon-coating, and further reaction in first stove fire layer, the gas valve first of the coal gas that is produced on the first stove is sent to gas holder;
Above step cycle.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103865583A (en) * | 2012-12-07 | 2014-06-18 | 黄德夫 | Serial circulating gas production method employing mixed gas stove at fixed bed |
| CN104312632A (en) * | 2014-10-24 | 2015-01-28 | 山西晋城无烟煤矿业集团有限责任公司 | Washed coal and small-sized coal blended fixed bed intermittent gasification method |
| CN104694167A (en) * | 2014-12-12 | 2015-06-10 | 周士友 | Novel two-stage type gas-solid bed continuous gasification device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092799A (en) * | 1993-03-23 | 1994-09-28 | 四川蜀华化工新技术开发有限公司 | Coal (Jiao) process for atmospheric continuous oxygen-enriched air gasification of coal (coke) |
| CN1247748C (en) * | 2004-07-06 | 2006-03-29 | 杜三民 | Intermittent gas making method and device with bituminous coal fixing layer |
| CN101215478B (en) * | 2008-01-04 | 2010-12-15 | 郭海峰 | Oxygen-increasing intermittent gasification method and technique for fixed bed coal gas producer |
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2009
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103865583A (en) * | 2012-12-07 | 2014-06-18 | 黄德夫 | Serial circulating gas production method employing mixed gas stove at fixed bed |
| CN104312632A (en) * | 2014-10-24 | 2015-01-28 | 山西晋城无烟煤矿业集团有限责任公司 | Washed coal and small-sized coal blended fixed bed intermittent gasification method |
| CN104694167A (en) * | 2014-12-12 | 2015-06-10 | 周士友 | Novel two-stage type gas-solid bed continuous gasification device |
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