CN220845991U - Coal dust gas making device - Google Patents
Coal dust gas making device Download PDFInfo
- Publication number
- CN220845991U CN220845991U CN202322648870.7U CN202322648870U CN220845991U CN 220845991 U CN220845991 U CN 220845991U CN 202322648870 U CN202322648870 U CN 202322648870U CN 220845991 U CN220845991 U CN 220845991U
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- gas
- furnace
- making
- coal
- pulverized coal
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- 239000002817 coal dust Substances 0.000 title claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 122
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 72
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000003245 coal Substances 0.000 claims abstract description 42
- 229910052742 iron Inorganic materials 0.000 claims abstract description 36
- 239000003034 coal gas Substances 0.000 claims abstract description 35
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 28
- 239000001301 oxygen Substances 0.000 claims abstract description 28
- 239000003345 natural gas Substances 0.000 claims abstract description 27
- 238000002407 reforming Methods 0.000 claims abstract description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000007921 spray Substances 0.000 claims abstract description 19
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052717 sulfur Inorganic materials 0.000 abstract description 12
- 239000011593 sulfur Substances 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 10
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000003009 desulfurizing effect Effects 0.000 abstract description 2
- 239000002893 slag Substances 0.000 description 31
- 229910002091 carbon monoxide Inorganic materials 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 238000002309 gasification Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910001567 cementite Inorganic materials 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000006057 reforming reaction Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
Abstract
The utility model discloses a coal dust gas making device, belongs to the technical field of direct reduction of coal gas shaft furnaces, and solves at least one of the problems of long process flow, high sulfur removal cost and high difficulty in heating coal gas caused by cooling, desulfurizing and heating the coal gas prepared from the coal gas in the prior art. The device comprises an intermediate frequency furnace, a gas making furnace and a gas reforming furnace which are connected in sequence; a molten iron pool is arranged in the intermediate frequency furnace; the gas making furnace comprises a gas making furnace body and an oxygen coal spray gun, wherein a gas outlet of the oxygen coal spray gun is positioned in the gas making furnace body and faces to the molten iron bath; the gas reformer comprises a reforming furnace body and a plurality of natural gas nozzles, wherein the natural gas nozzles are communicated with the inner cavity of the reforming furnace body. The utility model can be used for coal gas of a shaft furnace.
Description
Technical Field
The utility model belongs to the technical field of direct reduction of coal gas shaft furnaces, and particularly relates to a coal dust gas making device.
Background
Existing coal-to-gas technologies typically include Texaco coal gasification technology, shell coal gasification technology, lurgi gasification technology, etc., which typically convert pulverized coal to carbon monoxide and hydrogen by steam or oxygen in the pulverized coal.
However, more impurities (such as sulfides) exist in the carbon monoxide and the hydrogen prepared by the method, a desulfurization device is additionally arranged to purify the cooled coal gas, and the desulfurized coal gas is required to be reheated when the method is subsequently used for direct reduction of the gas-based shaft furnace, but the difficulty of heating the coal gas is high, so that the whole process flow of the coal gas is complex, and the cost is high.
Disclosure of utility model
In view of the above analysis, the present utility model aims to provide a pulverized coal gas-making device, which solves at least one of the problems of long process flow, high sulfur removal cost and high difficulty in heating coal gas caused by cooling, desulfurizing and heating the coal gas produced by the coal gas in the prior art.
The aim of the utility model is mainly achieved by the following technical scheme.
The utility model provides a pulverized coal gas making device, which comprises an intermediate frequency furnace, a gas making furnace and a gas reforming furnace which are connected in sequence; a molten iron pool is arranged in the intermediate frequency furnace; the gas making furnace comprises a gas making furnace body and an oxygen coal spray gun, wherein a gas outlet of the oxygen coal spray gun is positioned in the gas making furnace body and faces to the molten iron bath; the gas reformer comprises a reforming furnace body and a plurality of natural gas nozzles, wherein the natural gas nozzles are communicated with the inner cavity of the reforming furnace body.
Further, the plurality of natural gas nozzles are uniformly arranged.
Further, the pulverized coal gas making device also comprises a three-way pipeline, wherein the three-way pipeline is provided with a three-way gas inlet, a gas outlet for a user and a gas outlet for the shaft furnace; the gas outlet of the reforming furnace body is connected with a three-way gas inlet, the gas outlet for users is connected with a gas user, and the gas outlet for the shaft furnace is directly connected with the shaft furnace.
Further, along the gas flow direction, the reforming furnace body comprises an expanding section, a constant diameter section and a reducing section which are connected in sequence.
Further, the natural gas nozzle is positioned at the expanding section of the lower part of the reforming furnace body.
Further, the distance between the natural gas nozzle and the bottom of the reforming furnace body is 15-20 cm.
Further, the included angle between the gas outlet angle of the natural gas nozzle and the tangential direction of the reforming furnace body is 15-50 degrees.
Further, the gas making furnace is arranged above the intermediate frequency furnace.
Further, the top end of the intermediate frequency furnace is opened, the bottom end of the gas making furnace is opened, and the top end opening is connected with the bottom end opening.
Further, the pulverized coal gas making device further comprises an oxygen top gun which is arranged in the gas making furnace and is connected with the top of the gas making furnace through the lifting component.
Compared with the prior art, the utility model can realize at least one of the following beneficial effects.
A) The pulverized coal gas making device provided by the utility model adopts the process of combining O 2 with pulverized coal injection gas making and molten iron bath slag making, and can realize on-line desulfurization while making the pulverized coal gas to obtain the coal gas with lower sulfur content. Specifically, on one hand, the gas making furnace is arranged above the intermediate frequency furnace, a molten iron molten pool is arranged in the intermediate frequency furnace, O 2 and coal dust are sprayed into the molten iron molten pool, sulfur in the coal dust is absorbed by the molten iron and the slag, and the sulfur in the coal dust is solidified in the molten iron and the slag, so that high-temperature gas with lower sulfur content can be obtained.
B) According to the pulverized coal gas making device provided by the utility model, as ash (for example, siO 2 and Al 2O3) in the pulverized coal has a high melting point, the slag forming agent is sprayed into a molten iron bath through the oxygen coal spray gun, the ash reacts with the slag forming agent to generate slag with a low melting point, and the slag can float on the surface of molten iron in a liquid state, so that the slag is conveniently discharged from an intermediate frequency furnace.
C) According to the pulverized coal gas making device, in the gas making furnace, the pulverized coal and O 2 are subjected to oxidation reaction, CO 2 is inevitably generated in the whole process, CO 2 in high-temperature gas and CH 4 in natural gas are reacted to generate CO and H 2(CO2+CH4＝2CO+2H2 through the arrangement of the reformer, the content of CO 2 in hot gas is reduced, the reduction potential of the gas is improved, so that the gas can be reformed and tempered by the gas reformer, and the reformed gas does not need to be cooled, desulfurized and heated, and can be directly used for direct reduction of a shaft furnace.
In the utility model, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the embodiments of the utility model particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the utility model, like reference numerals being used to refer to like parts throughout the several views.
FIG. 1 is a schematic diagram of a gas producer and an intermediate frequency furnace in a pulverized coal gas producer according to an embodiment of the present utility model;
Fig. 2 is a schematic structural diagram of a gas reformer in a pulverized coal gas-making device according to an embodiment of the present utility model.
Reference numerals:
1-an intermediate frequency furnace; 2-a iron adding port; 3-gas making furnace; 4-slag hole; 5-oxygen coal spray gun; 6-oxygen top lance; 7-reforming a furnace body; 8-a three-way pipeline; 9-gas outlet for shaft furnace.
Detailed Description
The following detailed description of preferred embodiments of the utility model is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the utility model, are used to explain the principles of the utility model and are not intended to limit the scope of the utility model.
Example 1
The embodiment provides a pulverized coal gas making device, referring to fig. 1, comprising an intermediate frequency furnace 1, a gas making furnace 3 and a gas reforming furnace which are sequentially connected, wherein the gas making furnace 3 is arranged above the intermediate frequency furnace 1, the top end of the intermediate frequency furnace 1 is provided with an opening, the bottom end of the gas making furnace 3 is provided with an opening, the opening is connected with the opening at the top end to realize that the gas making furnace 3 is communicated with the top end of the intermediate frequency furnace 1, a molten iron molten pool is arranged in the intermediate frequency furnace 1, the gas making furnace 3 comprises a gas making furnace 3 body and an oxygen coal spray gun 5, the gas outlet of the oxygen coal spray gun 5 is positioned in the gas making furnace 3 body and faces the molten iron molten pool, and the oxygen coal spray gun 5 is used for spraying mixed powder of pulverized coal and a slag forming agent and O 2 to the molten iron molten pool; the air inlet of the gas reformer is connected with the air outlet of the gas making furnace 3.
When in implementation, pig iron is filled into an intermediate frequency furnace 1, melted into molten iron through induction heating, and a molten iron pool is formed in the intermediate frequency furnace 1; pulverized coal, a slag former and O 2 are sprayed into a molten iron bath through an oxygen coal spray gun 5, S in the pulverized coal reacts with the slag former on the surface of the molten iron bath, S is fixed in molten iron and slag, O 2 reacts with the pulverized coal on the surface of the molten iron bath to generate coal gas, ash in the pulverized coal reacts with the slag former on the surface of the molten iron bath to generate slag with a lower melting point, and therefore high-quality coal gas with lower sulfur content can be generated; high quality gas with lower sulfur content passes through the reformer, and CO 2 in the high temperature gas reacts with CH 4 in the natural gas to produce CO and H 2(CO2+CH4＝2CO+2H2).
The pulverized coal sprayed from the oxygen coal spray gun 5, O 2 and the molten iron in the intermediate frequency furnace 1 react as follows:
2C+O2(g)＝2CO(g)
C+O2(g)＝CO2(g)
3Fe+C＝Fe3C
2Fe3C+O2＝6Fe+2CO(g)
Compared with the prior art, the coal dust gas making device provided by the embodiment adopts the process of combining O 2 with coal dust injection gas making and molten iron bath slag making, and can realize on-line desulfurization while making coal gas to obtain coal gas with lower sulfur content. Specifically, on one hand, the gas making furnace 3 is arranged above the intermediate frequency furnace 1, a molten iron molten pool is arranged in the intermediate frequency furnace 1, O 2 and coal dust are sprayed into the molten iron molten pool, sulfur in the coal dust is absorbed by the molten iron and the slag, and the sulfur in the coal dust is solidified in the molten iron and the slag, so that high-temperature gas with lower sulfur content can be obtained.
On the other hand, since the melting point of ash (for example, siO 2 and Al 2O3) in the pulverized coal is high, the slag forming agent is sprayed into the molten iron bath through the oxygen coal spray gun 5, and slag with a low melting point can be generated by the reaction of the ash and the slag forming agent, and the slag can float on the surface of the molten iron in a liquid state so as to be conveniently discharged from the intermediate frequency furnace 1.
On the other hand, in the gas making furnace 3, the coal dust and O 2 are subjected to oxidation reaction, CO 2 is inevitably generated in the whole process, CO 2 in high-temperature gas and CH 4 in natural gas are reacted to generate CO and H 2(CO2+CH4＝2CO+2H2 through the arrangement of the reformer, the content of CO 2 in hot gas is reduced, the reduction potential of the gas is improved, and thus, the gas can be reformed and tempered by the gas reformer, and the reformed gas does not need to be cooled, desulfurized and heated any more and can be directly used for direct reduction of the shaft furnace.
The structure of the gas reformer comprises a reformer body 7 and a plurality of natural gas nozzles 22 which are uniformly arranged, wherein the natural gas nozzles 22 are communicated with the inner cavity of the reformer body 7.
It should be noted that, the above-mentioned pulverized coal gas making device also includes three-way pipe 8, three-way pipe 8 has three-way air inlet, user gas outlet and shaft furnace gas outlet 9, the gas outlet of reforming furnace body 7 is connected with three-way air inlet, user gas outlet is connected with gas user, can be used to gas user's daily gas consumption, see fig. 2, shaft furnace gas outlet 9 is directly connected with shaft furnace, can be directly used to shaft furnace direct reduction without cooling gas.
Illustratively, along the gas flow direction, the reforming furnace body 7 comprises an expanding section, a constant diameter section and a reducing section which are sequentially connected, so that the gas enters the reforming furnace body 7 from the expanding section, the gas and the natural gas are convenient to uniformly mix, the reforming reaction is facilitated, the constant diameter section provides enough reaction space for the gas to react with the natural gas, the necking section can improve the flow velocity of the reformed gas, and the gas is convenient to be discharged out of the gas reforming furnace; the natural gas nozzle 22 is positioned at the expanding section of the lower part of the reforming furnace body 7, the distance between the natural gas nozzle 22 and the bottom of the reforming furnace body 7 is 15-20 cm, the included angle between the gas outlet angle of the natural gas nozzle 22 and the tangential direction of the reforming furnace body 7 is 15-50 degrees, and natural gas enters the reforming furnace body 7 in a rotational flow manner, so that the natural gas is convenient to be uniformly mixed with gas, the flow path of the natural gas and the gas can be prolonged, and the reaction time is prolonged.
The oxygen-coal spray gun 5 may be a sleeve-type oxygen-coal spray gun, the pulverized coal and the slag former are sprayed into a molten iron bath from a central spray hole of the oxygen-coal spray gun 5, the oxygen is sprayed into the molten iron bath from a circumferential seam of the oxygen-coal spray gun 5, and the pulverized coal is wrapped by the oxygen for combustion, so that the combustion efficiency of the pulverized coal and the oxygen is improved, and the coal gas with high CO content is generated.
It is to be understood that, in order to load pig iron into the intermediate frequency furnace 1, a tap hole 2 is formed in the furnace body of the intermediate frequency furnace 1, and the tap hole 2 is located at the top end of the intermediate frequency furnace 1 and at the junction of the intermediate frequency furnace 1 and the gas making furnace 3.
Similarly, in order to facilitate the discharge of the slag, the furnace body of the gas making furnace 3 is provided with a slag hole 4, and the slag hole 4 is positioned at the bottom end of the gas making furnace 3, so that the slag hole 4 is close to the bottom end of the gas making furnace 3, and is beneficial to regularly discharging the slag. Considering that slag is usually discharged by taking the slag to a certain height, the distance between the center line of the slag hole 4 and the bottom end of the gas making furnace 3 is 5-10 cm, for example.
In order to supplement oxygen to the intermediate frequency furnace 1 and improve the reaction rate of C, the gas making furnace 3 further comprises an oxygen top lance 6, wherein the oxygen top lance 6 is arranged in the gas making furnace 3 and is connected with the top of the gas making furnace 3 through a lifting assembly. In this way, in the process of preparing the gas by the coal, the oxygen top lance 6 is lowered to the lower part of the gas making furnace 3 by the lifting component, the oxygen top lance 6 can intensively supply oxygen to the central area of the molten iron pool, and the oxygen top lance reacts with C in the molten iron to generate the gas, so that the reaction rate of C and the gas preparing efficiency of the coal are improved.
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.
Claims (10)
1. The coal dust gas making device is characterized by comprising an intermediate frequency furnace, a gas making furnace and a gas reforming furnace which are connected in sequence;
a molten iron pool is arranged in the intermediate frequency furnace;
The gas making furnace comprises a gas making furnace body and an oxygen coal spray gun, and a gas outlet of the oxygen coal spray gun is positioned in the gas making furnace body and faces to a molten iron bath;
The gas reformer comprises a reformer body and a plurality of natural gas nozzles, wherein the natural gas nozzles are communicated with the inner cavity of the reformer body.
2. The pulverized coal gas-making apparatus according to claim 1, wherein the plurality of natural gas nozzles are uniformly arranged.
3. The pulverized coal gas making apparatus according to claim 1, further comprising a three-way pipe having a three-way gas inlet, a user gas outlet and a shaft furnace gas outlet;
The gas outlet of the reforming furnace body is connected with the three-way gas inlet, the gas outlet for users is connected with the gas users, and the gas outlet for the shaft furnace is directly connected with the shaft furnace.
4. A pulverized coal gas-making apparatus according to claim 3, wherein the reforming furnace body comprises an expanded diameter section, a constant diameter section and a reduced diameter section which are connected in sequence along the gas flow direction.
5. The pulverized coal gas generator according to claim 4, wherein the natural gas nozzle is located at a diameter-expanding section of a lower portion of the reforming furnace body.
6. The pulverized coal gas generator according to claim 1, wherein the distance between the natural gas nozzle and the bottom of the reforming furnace body is 15-20 cm.
7. The pulverized coal gas generator according to claim 1, wherein the included angle between the gas outlet angle of the natural gas nozzle and the tangential direction of the reforming furnace body is 15-50 °.
8. The pulverized coal gas making device according to claim 1, wherein the gas making furnace is arranged above the intermediate frequency furnace.
9. The pulverized coal gas-producing unit as claimed in claim 8, wherein the intermediate frequency furnace has a top end opening, and the gas producing furnace has a bottom end opening, and the top end opening is connected to the bottom end opening.
10. The pulverized coal gas-making apparatus according to any one of claims 1 to 9, further comprising an oxygen top lance disposed within the gas-making furnace and connected to the top of the gas-making furnace by a lifting assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322648870.7U CN220845991U (en) | 2023-09-28 | 2023-09-28 | Coal dust gas making device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322648870.7U CN220845991U (en) | 2023-09-28 | 2023-09-28 | Coal dust gas making device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220845991U true CN220845991U (en) | 2024-04-26 |
Family
ID=90783123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322648870.7U Active CN220845991U (en) | 2023-09-28 | 2023-09-28 | Coal dust gas making device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220845991U (en) |
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2023
- 2023-09-28 CN CN202322648870.7U patent/CN220845991U/en active Active
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