CN109401798A - A kind of double circle of contact double-section dry coal powder pressurized-gasification furnaces and its gasification process - Google Patents
A kind of double circle of contact double-section dry coal powder pressurized-gasification furnaces and its gasification process Download PDFInfo
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- CN109401798A CN109401798A CN201811526234.4A CN201811526234A CN109401798A CN 109401798 A CN109401798 A CN 109401798A CN 201811526234 A CN201811526234 A CN 201811526234A CN 109401798 A CN109401798 A CN 109401798A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/721—Multistage gasification, e.g. plural parallel or serial gasification stages
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/485—Entrained flow gasifiers
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/50—Fuel charging devices
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0959—Oxygen
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0973—Water
- C10J2300/0976—Water as steam
Abstract
The invention discloses and a kind of double circle of contact double-section dry coal powder pressurized-gasification furnaces and its gasification process, several first segment burners have been evenly arranged on the wall surface of first segment reaction chamber, first segment burner is connected to first segment reaction chamber, first imaginary circle is corresponding at the center of first segment reaction chamber, the center line of each first segment burner and first imaginary circle are tangent, and are formed by the first imaginary circle from the air-flow that first segment burner ejects and rotate in the same direction；Several second segment burners have been evenly arranged on the wall surface of the second segment reaction chamber, the second segment burner is connected to second segment reaction chamber, second imaginary circle is corresponding at the center of second segment reaction chamber, the center line of each second segment burner and second imaginary circle are tangent, and opposite with the direction of rotation of the first imaginary circle from the direction of rotation that the air-flow that second segment burner ejects is formed by the second imaginary circle.The present invention can obtain fluid field in furnace, higher retention efficiency and efficiency of carbon con version more evenly.
Description
Technical field
The invention belongs to Coal Gasification Technology fields, and in particular to a kind of double circle of contact double-section dry coal powder pressurized-gasification furnaces and its
Gasification process.
Background technique
Coal Gasification Technology is one of the core technology that Coal Clean efficiently utilizes, and industrialized Coal Gasification Technology is mainly wrapped
It is these three types of to include fixed bed gasification, fluidized gasification and entrained flow gasification.Air-flow bed coal-gasification technology has gasification parameter height, gasification
The features such as capacity is big, performance indicator is high, good environmental protection, wide coal adaptability, represents the development side of large-scale Coal Gasification Technology
To.Double-section dry coal powder pressure gasifying technology is one of representative art of entrained flow bed gasification technology, has been successfully applied to entirety
Gasification combined-cycle (IGCC) electricity generation system and Coal Chemical Engineering Project.
In the prior art, for the shock flow field in gasification furnace there are short circuit air flow, the carbon particle reaction in burner hearth is insufficient, holds
Certain carbon loss is easily caused, to reduce the efficiency of carbon con version of gasification furnace.Meanwhile gasification furnace second-stage reaction is not due to having oxygen
It participates in, the reaction temperature and reaction rate of pulverized coal pyrolysis and gasification reaction are lower, and reaction can also generate a certain amount of ammonia nitrogen, in turn
Cause the ammonia nitrogen amount in gasification ash water to increase, increases the processing difficulty of sewage disposal system.In gasification furnace heavy-duty service,
The retention efficiency of gasification furnace about 40%, flying dust carbon residue are more than 10%, and when the activity of coal for gasification is lower, flying dust carbon residue can be further
Increase.
Summary of the invention
For the problems of the prior art, the present invention provides a kind of double circle of contact double-section dry coal powder pressurized-gasification furnaces and its
Gasification process improves the retention efficiency and efficiency of carbon con version of gasification furnace the purpose is to make the even flow field in gasification furnace, reduces gasification
The ammonia nitrogen production quantity of reaction process.
To solve above-mentioned technology, the present invention is resolved by following scheme:
A kind of double circle of contact double-section dry coal powder pressurized-gasification furnaces, including the first segment reaction chamber surrounded by water-cooling wall and second
Section reaction chamber, the bottom of the first segment reaction chamber are provided with slag-drip opening, and second segment reaction chamber top is provided with coal gas and goes out
Mouthful, the top of the first segment reaction chamber is connected to the bottom of second segment reaction chamber；
Several first segment burners, the first segment burner and first have been evenly arranged on the wall surface of the first segment reaction chamber
Section reaction chamber connection, is corresponding with first imaginary circle, the center line of each first segment burner at the center of first segment reaction chamber
It is tangent with first imaginary circle, and being formed by the first imaginary circle from the air-flow that first segment burner ejects is in the same direction
Rotation；
Several second segment burners, the second segment burner and second have been evenly arranged on the wall surface of the second segment reaction chamber
Section reaction chamber connection, is corresponding with second imaginary circle, the center line of each second segment burner at the center of second segment reaction chamber
It is tangent with second imaginary circle, and from the air-flow that second segment burner ejects be formed by the direction of rotation of the second imaginary circle with
The direction of rotation of first imaginary circle is opposite.
Further, the exit end face center for the first segment burner that two center lines are parallel to each other is connected to be formed in first
Heart connecting line, the center of circle of first central junction line Jing Guo the first imaginary circle, the center line of first segment burner and the first center
Connecting line is formed by angle α1It is 4 °~8 °；The exit end face center for the second segment burner that two center lines are parallel to each other connects
It connects to form the second central junction line, the center of circle of second central junction line Jing Guo the second imaginary circle, the center of second segment burner
Line and the second central junction line are formed by angle α1It is 4 °~10 °.
Further, between the first segment reaction chamber and second segment reaction chamber by aditus laryngis be connected to, the aditus laryngis it is straight
Diameter is less than the diameter of reaction chamber.
Further, several first segment burners are on sustained height face, and the setting of first segment burner is anti-in first segment
Answer the middle and lower sections of room；Several second segment burners are on sustained height face, and the distance at the top of second segment burner to aditus laryngis
1000~1500mm；The diameter of the aditus laryngis is equal to the half of reaction chamber diameter.
Further, the water-cooling wall setting is formed between the water-cooling wall and gasification furnace shell in gasification furnace shell
Gasification furnace annular space.
Further, there are four the first segment burners, there are two the second segment burners.
Further, the gas exit is provided on the side wall of second segment reaction chamber, and gas exit is closely located to
The top of second-stage reaction room.
A kind of gasification process of double circle of contact double-section dry coal powder pressurized-gasification furnaces is, from each first segment burner to first segment
Investment coal dust and gasifying agent, coal dust and gasifying agent form counterclockwise or clockwise rotation in first segment reaction chamber in reaction chamber
Stream, the coal gas of high temperature eddy flow that coal dust reacts generation with gasifying agent rise through aditus laryngis and enter second segment reaction chamber；
Coal dust and gasifying agent are put into second segment reaction chamber from each second segment burner, coal dust and gasifying agent are in second segment
Form eddy flow in reaction chamber, and second segment react indoor eddy flow reacted with first segment indoor eddy flow direction of rotation on the contrary,
Second segment reacts indoor eddy flow and reacts with the coal gas of high temperature hybrid concurrency life entered through aditus laryngis, the coal gas of high temperature uplink after reaction
To gas exit.
Further, the gasifying agent is the gaseous mixture of oxygen or oxygen and steam.
Further, the coal dust amount put into second segment reaction chamber is that gasification furnace always puts into the 5%~15% of coal dust amount,
The oxygen coal ratio put into first segment reaction chamber is 0.8~0.95kg/kg, the oxygen coal ratio put into second segment reaction chamber is 0.2~
0.4kg/kg。
Compared with prior art, the present invention at least has the advantages that the wall surface of first segment reaction chamber of the invention
On be evenly arranged several first segment burners, first segment burner is connected to first segment reaction chamber, at the center of first segment reaction chamber
It is corresponding with first imaginary circle, the center line of each first segment burner and first imaginary circle are tangent, and burn from first segment
The air-flow that mouth ejects is formed by the first imaginary circle and rotates in the same direction.Therefore, coal dust and gasifying agent are through several
First segment burner enters in the first segment reaction chamber of gasification furnace, if carried interest fluidic vectoring thrust circle of contact Swirling Flow, the burner hearth in flow field fill
Full scale is good, and gas-particle two-phase is uniformly mixed, and can improve the short circuit air flow for hitting flow field, meanwhile, the high temperature of coal dust and reaction generation
Molten state lime-ash is more moved to burner hearth wall surface under the effect of Swirling Flow centrifugal force, increases coal dust and high-temperature molten-state ash
The residence time of slag, and then extend coal dust and react the indoor reaction time in first segment, with the operation of gasification furnace, gasification furnace furnace
It will form high-temperature liquid state slag blanket on thorax water-cooling wall wall surface, therefore can more trap coal dust and high-temperature ash, be conducive to improve
Retention efficiency.Several second segment burners are evenly arranged on the wall surface of second segment reaction chamber, second segment burner is reacted with second segment
Room connection, is corresponding with second imaginary circle, the center line and second of each second segment burner at the center of second segment reaction chamber
Imaginary circle is tangent, and direction of rotation and the first imaginary circle of the second imaginary circle are formed by from the air-flow that second segment burner ejects
Direction of rotation it is opposite.Likewise, coal dust and gasifying agent enter the second segment reaction chamber of gasification furnace through several second segment burners
It is interior, if the traditional method of indicating the pronunciation of a Chinese character circle Swirling Flow of carried interest fluidic vectoring thrust is mixed with the coal gas of high temperature of first segment reaction chamber discharge swirl, because the
It is contrary that one section of reaction chamber reacts indoor eddy flow with second segment, therefore can further enhance gas-particle two-phase mixing, the
Oxygen is put into second-stage reaction room can be improved the indoor reaction temperature of second segment reaction and reaction rate, improve efficiency of carbon con version,
And control ammonia nitrogen generation.To sum up, the present invention can obtain fluid field in furnace, higher retention efficiency and efficiency of carbon con version more evenly.
Further, the exit end face center for the first segment burner that two center lines are parallel to each other is connected to be formed in first
Heart connecting line, the center of circle of first central junction line Jing Guo the first imaginary circle, the center line of first segment burner are connect with the first center
Line is formed by angle α1It is 4 °~8 °, in order to establish circle of contact flow field in first segment reaction chamber and avoid hitting the production of short circuit air flow
Raw, the drift angle of first segment burner at least should be at 3 ° or more.When the drift angle increases, the high-temperature region of reaction chamber can be leaned on to reaction chamber wall surface
Closely, the local heat load of water-cooling wall increases, when four strands of air-flows of reaction chamber are uneven, it may appear that the case where reaction chamber is burnt partially,
The safe operation for influencing water-cooling wall, is formed by angle α for the center line of first segment burner and the first central junction line1It is set as
4 °~8 °, the Swirling Flow of the circle of contact can either be formed, improves the uniformity and burner hearth degree of filling of Flow and heat flux, while can be with
It resists the reaction chamber being likely to occur and burns situation partially, it is ensured that water-cooling wall safe operation.
Further, the diameter of aditus laryngis is less than the diameter of reaction chamber, the retention efficiency of wall surface near aditus laryngis can be improved, together
When, because the diameter of aditus laryngis becomes smaller, the air-flow velocity of aditus laryngis outlet becomes faster, and it is mixed to be more conducive to gas-particle two-phase in second segment reaction chamber
It closes uniform.
Further, several first segment burners are arranged on sustained height face, and first segment burner is arranged in first segment
The middle and lower sections of reaction chamber are conducive to the degree of filling for improving entire burner hearth, extend coal dust and gasifying agent in the anti-of first segment reaction chamber
Between seasonable, while temperature needed for advantageously ensuring that the smooth deslagging of slag-drip opening；Several second segment burners are arranged in sustained height
1000~1500mm of distance on face, and at the top of second segment burner to aditus laryngis because second segment reaction chamber in put into coal dust with
Gasifying agent closer to the first reaction chamber high-temperature region, the sensible heat of the coal gas of high temperature that can be more generated using first segment reaction chamber into
Row reaction is conducive to improve sensible heat utilization efficiency and reaction rate in this way；When the diameter of aditus laryngis is equal to the half of reaction chamber diameter
When, the air-flow velocity of aditus laryngis outlet increases, and gas-particle two-phase is uniformly mixed, and reaches ideal state.
Further, water-cooling wall setting forms gasification ring in gasification furnace shell between water-cooling wall and gasification furnace shell
Shape space, gasification furnace annular space can play the role of insulating layer, also provide space for the repair and maintenance work of gasification furnace.
Further, gasifying agent is the gaseous mixture of oxygen or oxygen and steam, and oxygen can be improved in second segment reaction chamber
Reaction temperature and reaction rate, improve efficiency of carbon con version, and control ammonia nitrogen generation, when reaction temperature is higher, steam can be used
To reduce reaction chamber temperature, moreover it is possible to play the role of adjusting the carbon monoxide and hydrogen ratio in coal gas.
Further, the coal dust amount put into second segment reaction chamber is that gasification furnace always puts into the 5%~15% of coal dust amount,
Gasification furnace can be further increased to the adaptability of coal, even if when the activity of coal for gasification reduces, it is also ensured that gasification
Furnace has higher efficiency of carbon con version.
Further, the oxygen coal ratio put into first segment reaction chamber is 0.8~0.95kg/kg, is thrown in second segment reaction chamber
The oxygen coal ratio entered is 0.2~0.4kg/kg, can either keep the running temperature of first segment reaction chamber and the group of product coal gas in this way
At, while the running temperature and reaction rate of second segment reaction chamber can be properly increased, promote the conversion of carbon, avoids disappearing too much
Consumption coal gas and lead to the reduction of cold gas efficiency, while second segment can be effectively reduced and react indoor ammonia nitrogen production quantity.
Detailed description of the invention
In order to illustrate more clearly of the technical solution in the specific embodiment of the invention, specific embodiment will be retouched below
Attached drawing needed in stating is briefly described, it should be apparent that, the accompanying drawings in the following description is some realities of the invention
Mode is applied, it for those of ordinary skill in the art, without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is gasification furnace structure schematic diagram of the present invention；
Fig. 2 is the first segment burner arrangement schematic diagram of gasification furnace of the present invention；
Fig. 3 is the second segment burner arrangement schematic diagram of gasification furnace of the present invention.
In figure: 1- water-cooling wall；2- gasification furnace shell；3- gasification furnace annular space；4- slag-drip opening；5- aditus laryngis；6- first segment
Reaction chamber；7- second segment reaction chamber；8- gas exit；9- first segment burner；10- first segment nozzle cover；11- second segment burner；
12- second segment nozzle cover.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
As shown in Figure 1, the invention mainly comprises water-cooling wall 1, gasification furnace shell 2, first segment reaction chamber 6, second segment reactions
Room 7, first segment burner 9 and second segment burner 11, the burner hearth of the gasification furnace are the cylinder-shaped reaction compartments surrounded by water-cooling wall 1.
In the water-evaporating furnace side wall surface of first segment reaction chamber 6 and the middle and lower part water-evaporating furnace side wall surface of second segment reaction chamber 7 all
The refractory material of protection water-cooling wall safe operation is built, there is the gasification furnace shell 2 of pressure-bearing in the outside of water-cooling wall 1, and gasify furnace shell 2
Cavity between water-cooling wall 1 is gasification furnace annular space 3, and gasification furnace annular space 3 provides for the work of subsequent repair and maintenance
Space.Water-cooling wall 1 shrinks to form slag-drip opening 4 in burner hearth bottom, and water-cooling wall 1 is shunk in the middle part of burner hearth forms aditus laryngis 5, in this hair
In bright a certain preferred embodiment, the diameter of slag-drip opening 4 and aditus laryngis 5 is the half of gasification furnace furnace diameter, burner hearth bottom and
Systolic slope in the middle part of burner hearth is 45 °, i.e., the gradient of the intermediate incline between slag-drip opening 4 and reaction chamber is 45 °, aditus laryngis 5 and anti-
The gradient for answering the intermediate incline between room is 45 °.Aditus laryngis 5 by burner hearth be divided into lower part first segment reaction chamber 6 and top second
Section reaction chamber 7, first segment reaction chamber 6 are connected to second segment reaction chamber 7, offer coal gas on the top of second segment reaction chamber 7 and go out
Mouth 8, gas exit 8 opens up the top for being located proximate to second segment reaction chamber 7.
In a certain preferred embodiment of the invention, four have been evenly arranged on the middle and lower part wall surface of first segment reaction chamber 6
A first segment burner 9, and it is provided with first segment nozzle cover 10 around the outlet of each first segment burner 9, in second segment reaction chamber 7
Lower part wall surface on be evenly arranged there are two second segment burner 11, and be provided with second around the outlet of each second segment burner 11
Section nozzle cover 12 is connected with cooling water in nozzle cover to absorb the thermic load of burner near exit to guarantee that burner is safely operated.It is excellent
Selection of land, four first segment burners 9 are on sustained height face, and two second segment burners 11 are on sustained height face, and second segment is burnt
The distance at mouth 11 to 5 top of aditus laryngis is 1000~1500mm, and the distance at second segment burner 11 to 5 top of aditus laryngis is small, this is conducive to
Improve sensible heat utilization efficiency and reaction rate.First segment burner 9 and second segment burner 11 can be using two channels or multichannels
Structure.
The wall surface of first segment reaction chamber 6 mentioned in the present invention and the wall surface of second segment reaction chamber 7, each mean water-cooling wall
1 burner hearth sidewall face.
It in other embodiments of the invention, certainly, can also be in first segment according to practical condition and equipment scale
It is evenly arranged six first segment burners 9 on the middle and lower part wall surface of reaction chamber 6, or more even number first segments can be set and burn
Mouth 9.Similarly, four second segment burners 11 can also be evenly arranged on the middle and lower part wall surface of second segment reaction chamber 7.
As a certain embodiment of the invention, it is illustrated in figure 2 the specific cloth of four first segment burners 9 of gasification furnace of the present invention
Mode is set, is corresponding with first imaginary circle, the center line of each first segment burner 9 and at the center of first segment reaction chamber 6
One imaginary circle is tangent counterclockwise, and being formed by the first imaginary circle from the air-flow that first segment burner 9 ejects is to rotate counterclockwise
's；The exit end face center for the first segment burner 9 that two center lines are parallel to each other is connected to form the first central junction line, first
The center of circle of the central junction line Jing Guo the first imaginary circle, the center line of first segment burner 9 and the first central junction line are formed by folder
Angle α1It is 4 °~8 °.I.e. by first segment burner 9 enter burner hearth four strands of coal dusts and gasifying agent (oxygen or oxygen and steam it is mixed
Close gas) fluidic vectoring thrust circle of contact flow field, gas-particle two-phase mixes strongly, can both increase the coal dust residence time, be also beneficial to burner hearth
Trapping of the wall surface to coal dust and lime-ash.It is illustrated in figure 3 the specific arrangement method of two second segment burners 11 of gasification furnace of the present invention,
Second imaginary circle, the center line of each second segment burner 11 and the second imagination are corresponding at the center of second segment reaction chamber 7
Smoother hour hands are tangent, and are formed by the second imaginary circle from the air-flow that second segment burner 11 ejects and rotate clockwise；It will
The exit end face center for the second segment burner 11 that two center lines are parallel to each other connects to form the second central junction line, the second center
The center of circle of the connecting line Jing Guo the second imaginary circle, the center line of second segment burner and the second central junction line are formed by angle α1For
4 °~10 °.Enter two strands of coal dusts and the gasifying agent (mixing of oxygen or oxygen and steam of burner hearth by second segment burner 11
Gas) fluidic vectoring thrust traditional method of indicating the pronunciation of a Chinese character circular jet field, and it is abundant with the coal gas of high temperature generated in first segment reaction chamber 6 that enters through aditus laryngis 5
Mixing and reaction, because first segment reaction chamber 6 is contrary with the eddy flow in second segment reaction chamber 7, gas-particle two-phase is strong
Mixing, flow field are more uniform.
As another embodiment of the present invention, it is corresponding with first imaginary circle at the center of first segment reaction chamber 6, each
The center line of first segment burner 9 and the first imaginary circle are tangent clockwise, and are formed by from the air-flow that first segment burner 9 ejects
First imaginary circle rotates clockwise；The exit end face center for the first segment burner 9 that two center lines are parallel to each other connects
The first central junction line, the center of circle of first central junction line Jing Guo the first imaginary circle are formed, first segment burner 9 and the first center connect
The center line of wiring is formed by angle α1It is 4 °~8 °.Enter four strands of coal dusts and the gasification of burner hearth by first segment burner 9
The fluidic vectoring thrust circle of contact flow field of agent (gaseous mixture of oxygen or oxygen and steam), gas-particle two-phase mix strongly, can both increase coal
The powder residence time is also beneficial to trapping of the burner hearth to coal dust and lime-ash.One second is corresponding at the center of second segment reaction chamber 7
Imaginary circle, the center line of each second segment burner 11 and the second imaginary circle are tangent counterclockwise, and eject from second segment burner 11
Air-flow be formed by the second imaginary circle and rotate counterclockwise；The second segment burner 11 that two center lines are parallel to each other goes out
Mouth end face center connects to form the second central junction line, and the center of circle of second central junction line Jing Guo the second imaginary circle, second segment is burnt
The center line of mouth and the second central junction line are formed by angle α1It is 4 °~10 °.Enter burner hearth by second segment burner 11
Two strands of coal dusts and gasifying agent (gaseous mixture of oxygen or oxygen and steam) fluidic vectoring thrust traditional method of indicating the pronunciation of a Chinese character circular jet field, and with through aditus laryngis 5
The coal gas of high temperature generated in first segment reaction chamber 6 entered is sufficiently mixed and reacts, because of first segment reaction chamber 6 and second segment
Eddy flow in reaction chamber 7 is contrary, therefore gas-particle two-phase mixes strongly, and flow field is more uniform.
Coal dust and gasification as a certain embodiment of the invention, when gasifying furnace igniting starting, in first segment reaction chamber 6
The kindling of agent is to light a fire to realize by integrated startup burner, which uses the structure of non-premixed combustion, adopts
It is medium with diesel oil and oxygen, can be improved the ignition success rate of gasification furnace and the security reliability of startup burner.
Double-section dry coal powder process for pressurized gasification of the invention uses two sections of classification gasification principles, to first segment reaction chamber 6
Coal dust and gasifying agent (gaseous mixture of oxygen or oxygen and steam) are put into, using circle of contact mode tissue flow field and arranges four first
Section burner 9, from four bursts of fluidic vectoring thrust circle of contact flow fields that first segment burner 9 sprays, the high-temperature ash of coal dust and reaction generation is with gas
Stream rotation rises, and increases the residence time of coal dust and high-temperature molten-state lime-ash, coal dust and high-temperature molten-state lime-ash are in eddy flow stream
It is more moved to water-cooling wall 1 under the action of centrifugal force, with the operation of gasification furnace, on 1 wall surface of gasification furnace furnace wall cooling
It will form high-temperature liquid state slag blanket, therefore can more trap coal dust and high-temperature ash.To second segment reaction chamber 7 put into coal dust with
Gasifying agent (gaseous mixture of oxygen or oxygen and steam) using traditional method of indicating the pronunciation of a Chinese character circle mode tissue flow field and arranges two second segment burners
11, traditional method of indicating the pronunciation of a Chinese character circle mode enhances the mixing of air-flow and the ascending air out of first segment reaction chamber 6 in second segment reaction chamber 7, gas
Gu two-phase mixtures are uniform.In addition, reaction temperature and reaction rate can be improved in the oxygen put into second segment reaction chamber 7, have
It is carried out conducive to reaction, improves efficiency of carbon con version, and controlled the ammonia nitrogen reacted in second segment reaction chamber 7 and generate.6 He of first segment reaction chamber
The ratio between coal feeding amount of second segment reaction chamber 7 is 9:1, can further increase gasification furnace to the adaptability of coal, even if gasifying
When being reduced with the activity of coal, it is ensured that gasification furnace efficiency of carbon con version with higher.
Utilize a kind of gasification process of double-section dry coal powder pressurized-gasification furnace of the invention are as follows: from each first segment burner 9
Into first segment reaction chamber 6, investment coal dust and gasifying agent, coal dust and gasifying agent are formed counterclockwise or suitable in first segment reaction chamber 6
The eddy flow of hour hands, coal dust react the coal gas of high temperature eddy flow generated with gasifying agent and rise through aditus laryngis 5 into second segment reaction chamber 7；
Coal dust and gasifying agent are put into second segment reaction chamber 7 from each second segment burner 11, coal dust and gasifying agent are
Eddy flow, and the rotation side of the eddy flow in second segment reaction chamber 7 and the eddy flow in first segment reaction chamber 6 are formed in second-stage reaction room 7
To on the contrary, the eddy flow in second segment reaction chamber 7 is mixed and is reacted, the high-temperature coal after reaction with the coal gas of high temperature entered through aditus laryngis 5
Gas goes upward to gas exit 8.The coal dust amount put into second segment reaction chamber 7 be gasification furnace always put into coal dust amount 5%~
15%, the interior oxygen coal ratio put into of first segment reaction chamber 6 is 0.8~0.95kg/kg, the oxygen coal ratio put into second segment reaction chamber 7
For 0.2~0.4kg/kg.
A kind of preferred embodiment of gasification process as a kind of double-section dry coal powder pressurized-gasification furnace of the invention are as follows: when
When gasified boiler system starts work, coal dust and gasifying agent are put into first segment reaction chamber 6 from each first segment burner 9 first,
Coal dust reacts the coal gas of high temperature eddy flow generated with gasifying agent and rises through aditus laryngis 5 into second segment reaction chamber 7；When first segment reacts
When the coal feeding amount of room 6 reaches the 50% of its rated load, start to put into coal dust and gasifying agent into second segment reaction chamber 7, allows coal
Powder participates in reacting in second segment reaction chamber 7 with gasifying agent.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of double circle of contact double-section dry coal powder pressurized-gasification furnaces, it is characterised in that: including the first segment surrounded by water-cooling wall (1)
The bottom of reaction chamber (6) and second segment reaction chamber (7), the first segment reaction chamber (6) is provided with slag-drip opening (4), and described second
Section reaction chamber (7) top is provided with gas exit (8), top and second segment reaction chamber (7) of the first segment reaction chamber (6)
Bottom connection；
Several first segment burners (9), the first segment burner (9) have been evenly arranged on the wall surface of the first segment reaction chamber (6)
It is connected to first segment reaction chamber (6), is corresponding with first imaginary circle, each first segment at the center of first segment reaction chamber (6)
The center line of burner (9) and first imaginary circle are tangent, and are formed by first from the air-flow that first segment burner (9) ejects
Imaginary circle rotates in the same direction；
Several second segment burners (11), the second segment burner have been evenly arranged on the wall surface of the second segment reaction chamber (7)
(11) it is connected to second segment reaction chamber (7), is corresponding with second imaginary circle, Mei Ge at the center of second segment reaction chamber (7)
The center line of two sections of burners (11) and second imaginary circle are tangent, and are formed from the air-flow that second segment burner (11) ejects
The second imaginary circle direction of rotation it is opposite with the direction of rotation of the first imaginary circle.
2. a kind of double circle of contact double-section dry coal powder pressurized-gasification furnaces according to claim 1, it is characterised in that: will be in two
The exit end face center for the first segment burner (9) that heart line is parallel to each other connects to form the first central junction line, first center
The center of circle of the connecting line Jing Guo the first imaginary circle, the center line and the first central junction line of first segment burner (9) are formed by angle
α1It is 4 °~8 °；It connects the exit end face center for the second segment burner (11) that two center lines are parallel to each other to form the second center
Connecting line, the center of circle of second central junction line Jing Guo the second imaginary circle, in the center line and second of second segment burner (11)
Heart connecting line is formed by angle α1It is 4 °~10 °.
3. a kind of double circle of contact double-section dry coal powder pressurized-gasification furnaces according to claim 1, it is characterised in that: described first
It is connected between section reaction chamber (6) and second segment reaction chamber (7) by aditus laryngis (5), the diameter of the aditus laryngis (5) is less than reaction chamber
Diameter.
4. a kind of double circle of contact double-section dry coal powder pressurized-gasification furnaces according to claim 3, it is characterised in that: described several
First segment burner (9) is on sustained height face, and first segment burner (9) setting is in the middle and lower sections of first segment reaction chamber (6)；It is described
Several second segment burners (11) on sustained height face, and second segment burner (11) to the distance at the top of aditus laryngis (5) be 1000~
1500mm；The diameter of the aditus laryngis (5) is equal to the half of reaction chamber diameter.
5. a kind of double circle of contact double-section dry coal powder pressurized-gasification furnaces according to claim 1, it is characterised in that: the water cooling
Wall (1) setting forms gasification furnace annular space in gasification furnace shell (2) between the water-cooling wall (1) and gasification furnace shell (2)
(3)。
6. a kind of double circle of contact double-section dry coal powder pressurized-gasification furnaces according to claim 1, it is characterised in that: described first
There are four section burners (9), and there are two the second segment burners (11).
7. a kind of double circle of contact double-section dry coal powder pressurized-gasification furnaces according to claim 1, it is characterised in that: the coal gas
Outlet (8) is provided on the side wall of second segment reaction chamber (7), the top for being closely located to second segment reaction chamber (7) of gas exit (8)
Portion.
8. the gasification process of described in any item a kind of double circle of contact double-section dry coal powder pressurized-gasification furnaces according to claim 1~7,
It is characterized by: investment coal dust and gasifying agent in from each first segment burner (9) to first segment reaction chamber (6), coal dust and gasification
Agent forms counterclockwise or clockwise eddy flow in first segment reaction chamber (6), and coal dust reacts the coal gas of high temperature generated with gasifying agent
Eddy flow rises through aditus laryngis (5) into second segment reaction chamber (7)；
Investment coal dust and gasifying agent, coal dust and gasifying agent are the in from each second segment burner (11) to second segment reaction chamber (7)
Eddy flow, and the eddy flow in second segment reaction chamber (7) and the eddy flow in first segment reaction chamber (6) are formed in second-stage reaction room (7)
Direction of rotation on the contrary, eddy flow in second segment reaction chamber (7) is reacted with the coal gas of high temperature hybrid concurrency life entered through aditus laryngis (5),
Coal gas of high temperature after reaction goes upward to gas exit (8).
9. a kind of gasification process of double circle of contact double-section dry coal powder pressurized-gasification furnaces according to claim 8, feature exist
In: the gasifying agent is the gaseous mixture of oxygen or oxygen and steam.
10. a kind of gasification process of double circle of contact double-section dry coal powder pressurized-gasification furnaces according to claim 8, feature exist
In: the coal dust amount put into second segment reaction chamber (7) is that gasification furnace always puts into the 5%~15% of coal dust amount, first segment reaction
The oxygen coal ratio put into room (6) is 0.8~0.95kg/kg, the oxygen coal ratio put into second segment reaction chamber (7) is 0.2~
0.4kg/kg。
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| CN110756135A (en) * | 2019-10-30 | 2020-02-07 | 青岛科技大学 | Multifunctional microfluid impinging stream nanoparticle preparation device |
| CN112779056A (en) * | 2020-12-21 | 2021-05-11 | 华能（天津）煤气化发电有限公司 | Flow arrangement for two-stage cooling of IGCC two-stage gasification furnace |
| CN112831352A (en) * | 2021-01-09 | 2021-05-25 | 中国华能集团清洁能源技术研究院有限公司 | Efficient gasification furnace and working method thereof |
| CN112961704A (en) * | 2021-02-04 | 2021-06-15 | 中国华能集团清洁能源技术研究院有限公司 | Coal gasification cracking gasification furnace |
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