CN209797845U - Limit recycling system for waste heat of raw coke oven gas - Google Patents
Limit recycling system for waste heat of raw coke oven gas Download PDFInfo
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- CN209797845U CN209797845U CN201920185707.2U CN201920185707U CN209797845U CN 209797845 U CN209797845 U CN 209797845U CN 201920185707 U CN201920185707 U CN 201920185707U CN 209797845 U CN209797845 U CN 209797845U
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- coke oven
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- cracking furnace
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
the utility model relates to a limit recycling system for the waste heat of coke oven crude gas, which comprises a crude gas storage balancer, a catalytic cracking furnace, an eccentric radial heat pipe heat exchanger and an ammonia spraying device; the coke oven carbonization chamber is connected with a collecting pipe through a plurality of ascending pipes, and the collecting pipe is connected with a crude gas storage balancer; the catalytic cracking furnace is connected with the raw coke oven gas storage balancer through a raw material inlet pipe, and a combustion system at the bottom of the catalytic cracking furnace is connected with the raw coke oven gas storage balancer through a fuel inlet pipe; a crude gas outlet of the catalytic cracking furnace is connected with an eccentric radial heat pipe heat exchanger, the eccentric radial heat pipe heat exchanger is connected with a steam pipe network through a first steam pipeline, the eccentric radial heat pipe heat exchanger is connected with a chemical production system through a second steam pipeline and a crude gas pipeline, and an ammonia spraying device is arranged on the crude gas pipeline. The utility model discloses a method of scientific subregion, catalytic cracking, waste heat limit recovery and steam direct introduction chemical product system avoids coal tar carbonization scheduling problem in traditional technology, realizes raw coke oven gas waste heat limit recovery and high-efficient utilization simultaneously.
Description
Technical Field
The utility model relates to a raw coke oven gas waste heat recovery technical field especially relates to a limit recycle system of coke oven raw coke oven gas waste heat.
Background
With the increasing shortage of energy supply, the steel industry pays more and more attention to the application of new energy-saving technology. The coke oven gas is a tawny gas-gas mixture generated when the charged coke oven gas is dry distilled in a coke oven carbonization chamber, and the composition of the coke oven gas is very complex and comprises a main body part, tar mist, water gas and various impurities. Through the heat balance test of coke ovens with different oven types, more than 70 percent of heat consumed by the coke oven is taken away by the generated coke and the raw coke oven gas generated by the coal in the high-temperature carbonization process. As for the heat brought by the coke oven product, the sensible heat brought by the coke is the first place, and the sensible heat brought by the crude gas is the second place, so that the sensible heat recovery and utilization potential is extremely high. With the continuous development and improvement of dry quenching (CDQ) technology at home and abroad, sensible heat contained in red hot coke has a mature recovery way. However, the raw coke gas sensible heat recovery technology is always in an exploration stage at present due to a series of problems such as design of a heat exchange surface in the sensible heat recovery process, coking of tar steam on the surface of a heat exchange pipeline and the like.
Disclosure of Invention
The utility model provides a limit recycle system of coke oven raw gas waste heat adopts scientific subregion, catalytic cracking, waste heat limit recovery and the direct method of introducing the chemical product system of steam, avoids coal tar carbonization scheduling problem in traditional technology, realizes raw gas waste heat limit recovery and high-efficient utilization simultaneously.
in order to achieve the above purpose, the utility model adopts the following technical scheme:
a limit recycling system for waste heat of coke oven crude gas comprises a crude gas storage balancer, a catalytic cracking furnace, an eccentric radial heat pipe heat exchanger and an ammonia spraying device; the coke oven carbonization chamber is connected with a collecting pipe through a plurality of ascending pipes, and the collecting pipe is connected with a crude gas storage balancer; the raw gas storage balancer consists of a raw gas storage tank and a high-temperature-resistant filter screen, wherein the high-temperature-resistant filter screen is arranged in the raw gas storage tank and close to a raw gas inlet; a raw gas inlet at the lower part of the catalytic cracking furnace is connected with a raw gas storage balancer through a raw material inlet pipe, and a combustion system at the bottom of the catalytic cracking furnace is connected with the raw gas storage balancer through a fuel inlet pipe; a raw gas outlet of the catalytic cracking furnace is connected with an eccentric radial heat pipe heat exchanger, the eccentric radial heat pipe heat exchanger is provided with a first steam outlet which is connected with a steam pipe network through a first steam pipeline, a second steam outlet which is connected with a chemical production system through a second steam pipeline is arranged, the raw gas outlet is connected with the chemical production system through the raw gas pipeline, and an ammonia spraying device is arranged on the raw gas pipeline.
the lower part of one side of the catalytic cracking furnace is provided with a raw gas inlet, the upper part of the other side of the catalytic cracking furnace is provided with a raw gas outlet, and the catalytic cracking furnace is internally provided with a plurality of catalyst layers.
The ascending pipe is divided into a plurality of groups, each group is provided with 1 crude gas storage balancer, each crude gas storage balancer is connected with a crude gas inlet of the catalytic cracking furnace through a raw material inlet pipe, and a flow regulating valve is arranged on each raw material inlet pipe.
Compared with the prior art, the beneficial effects of the utility model are that:
By adopting the method of scientific zoning, catalytic cracking, waste heat limit recovery and direct introduction of steam into the chemical production system, the problems of coal tar carbonization and the like in the traditional process are avoided, the waste heat limit recovery and high-efficiency utilization of the raw gas are realized, the energy conservation, emission reduction and pollution control are realized, and the method has great economic benefit and social significance.
Drawings
FIG. 1 is a schematic structural diagram of a system for recycling the waste heat of raw coke oven gas to the limit.
In the figure: 1. coke oven carbonization chamber 2, ascending pipe 3, collecting pipe 4, crude gas storage balancer 5, fuel inlet pipe 6, raw material inlet pipe 7, catalyst layer 8, catalytic cracking furnace 9, eccentric radial heat pipe exchanger 10, steam pipe network 11, ammonia injection device 12 and chemical production system
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
As shown in fig. 1, the system for recycling the waste heat of the raw gas of the coke oven of the utility model comprises a raw gas storage balancer 4, a catalytic cracking furnace 8, an eccentric radial heat pipe heat exchanger 9 and an ammonia injection device 11; the coke oven carbonization chamber 1 is connected with a collecting pipe 3 through a plurality of ascending pipes 2, and the collecting pipe 3 is connected with a crude gas storage balancer 4; the raw gas storage balancer 4 consists of a raw gas storage tank and a high-temperature-resistant filter screen, wherein the high-temperature-resistant filter screen is arranged in the raw gas storage tank close to a raw gas inlet; a raw gas inlet at the lower part of the catalytic cracking furnace 8 is connected with a raw gas storage balancer 4 through a raw material inlet pipe 6, and a combustion system at the bottom of the catalytic cracking furnace 8 is connected with the raw gas storage balancer 4 through a fuel inlet pipe 5; a raw gas outlet of the catalytic cracking furnace 8 is connected with an eccentric radial heat pipe heat exchanger 9, the eccentric radial heat pipe heat exchanger 9 is provided with a first steam outlet which is connected with a steam pipe network 10 through a first steam pipeline, a second steam outlet which is connected with a chemical production system 12 through a second steam pipeline, the raw gas outlet is connected with the chemical production system 12 through the raw gas pipeline, and an ammonia spraying device 11 is arranged on the raw gas pipeline.
The lower part of one side of the catalytic cracking furnace 8 is provided with a raw gas inlet, the upper part of the other side is provided with a raw gas outlet, and the catalytic cracking furnace 8 is internally provided with a plurality of catalyst layers 7.
The ascending pipe 2 is divided into a plurality of groups, each group is provided with 1 crude gas storage balancer 4, each crude gas storage balancer 4 is respectively connected with a crude gas inlet of a catalytic cracking furnace 8 through a raw material inlet pipe 6, and the raw material inlet pipe 6 is provided with a flow regulating valve.
The utility model relates to a coke oven crude gas waste heat limit recycle system's theory of operation is: raw coke oven gas generated by dry distillation of coal in a coke oven carbonization chamber 1 enters a raw coke oven gas storage balancer 4 through a rising pipe 2 and a collecting pipe 3, and red-hot solid particles are removed through a high-temperature resistant filter screen; a part of the buffered raw gas is used as fuel to enter a combustion system of the catalytic cracking furnace 8 for combustion, and a catalyst layer 7 in the catalytic cracking furnace 8 is heated to a proper temperature; the other part of the flue gas quantitatively flows into a catalytic cracking furnace 8 to participate in cracking reaction, the flue gas after heating a catalyst layer 7 and the raw gas after catalytic cracking recover waste heat by an eccentric radial heat pipe heat exchanger 9, the generated high-temperature and high-pressure steam is merged into a steam pipe network 10, and the cooled raw gas enters a chemical production system 12 for purification treatment after being sprayed with ammonia by an ammonia spraying device 11 and cooled.
The process method of the limit recycling system for the waste heat of the raw gas of the coke oven specifically comprises the following steps: :
1) Dividing the ascending pipes 2 into a plurality of groups according to the coke pushing sequence of the coke oven; each group of ascending pipes 2 is provided with 1 crude gas storage balancer 4 so as to eliminate the influence of the characteristic of the periodic production of crude gas on the waste heat recovery system and ensure the efficient operation of the system;
2) Leading out the crude gas with the temperature of more than 750 ℃ from a coke oven carbonization chamber 1, sequentially passing through an ascending pipe 2 and a collecting pipe 3, entering a crude gas storage balancer 4, and removing incandescent solid particles through a high-temperature-resistant filter screen to prevent the hot solid particles from blocking a combustion system of a catalytic cracking furnace 8 or causing high-temperature overburning of a catalyst in the catalytic cracking furnace 8;
3) One part of filtered raw gas with the temperature of more than 700 ℃ enters a combustion system at the bottom of the catalytic cracking furnace 8 to participate in combustion, the generated high-temperature flue gas at 1100 ℃ exchanges heat with the catalyst layer 7, and the combustion system is closed after the temperature of the catalyst layer 7 is raised to 500 ℃ to prepare for the next catalytic cracking reaction;
4) The other part of the raw gas is quantitatively blown from the lower part of the catalytic cracking furnace 8, the tar in the raw gas is subjected to cracking reaction under the action of the catalyst layer 7, and the H in the gas is increased2、CH4、C2H4content, the CO content is reduced, and the total heat value is increased; the chemical reaction formula of the process is as follows:
Tar → C + CnHm+H2+CO (1)
Tar + H2O→CO+H2 (2)
CnHm+H2O→CO+H2 (3)
tar → CO + H2+CH4+… (6)
CnHm+{H2O,CO2…}→CO+H2+CH4+… (7)
5) The temperature of the raw gas after catalytic cracking is reduced to 600-700 ℃, the raw gas enters an eccentric radial heat pipe heat exchanger 9, saturated steam of 2.5MPa/400 ℃ is generated after heat exchange, one part of the saturated steam is merged into a steam pipe network 10, and the other part of the saturated steam is supplied to a chemical production system 12 for use;
6) The raw gas after catalytic cracking does not contain coal tar basically, the raw gas after being cooled to 150 ℃ is discharged from the eccentric radial heat pipe heat exchanger 9, and is further cooled by the ammonia spraying device 11 and then is sent to the chemical production system 12.
The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the concept of the present invention within the technical scope disclosed in the present invention.
Claims (3)
1. A limit recycling system for waste heat of coke oven crude gas is characterized by comprising a crude gas storage balancer, a catalytic cracking furnace, an eccentric radial heat pipe heat exchanger and an ammonia spraying device; the coke oven carbonization chamber is connected with a collecting pipe through a plurality of ascending pipes, and the collecting pipe is connected with a crude gas storage balancer; the raw gas storage balancer consists of a raw gas storage tank and a high-temperature-resistant filter screen, wherein the high-temperature-resistant filter screen is arranged in the raw gas storage tank and close to a raw gas inlet; a raw gas inlet at the lower part of the catalytic cracking furnace is connected with a raw gas storage balancer through a raw material inlet pipe, and a combustion system at the bottom of the catalytic cracking furnace is connected with the raw gas storage balancer through a fuel inlet pipe; a raw gas outlet of the catalytic cracking furnace is connected with an eccentric radial heat pipe heat exchanger, the eccentric radial heat pipe heat exchanger is provided with a first steam outlet which is connected with a steam pipe network through a first steam pipeline, a second steam outlet which is connected with a chemical production system through a second steam pipeline is arranged, the raw gas outlet is connected with the chemical production system through the raw gas pipeline, and an ammonia spraying device is arranged on the raw gas pipeline.
2. The coke oven crude gas waste heat limit recycling system of claim 1, wherein the catalytic cracking furnace is provided with a crude gas inlet at the lower part of one side and a crude gas outlet at the upper part of the other side, and the catalytic cracking furnace is provided with a plurality of catalyst layers.
3. The extreme recycling system for the waste heat of the coke oven raw gas as claimed in claim 1, wherein the ascending pipes are divided into a plurality of groups, each group is provided with 1 raw gas storage balancer, each raw gas storage balancer is connected with a raw gas inlet of the catalytic cracking furnace through a raw material inlet pipe, and the raw material inlet pipe is provided with a flow regulating valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920185707.2U CN209797845U (en) | 2019-02-02 | 2019-02-02 | Limit recycling system for waste heat of raw coke oven gas |
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| CN201920185707.2U CN209797845U (en) | 2019-02-02 | 2019-02-02 | Limit recycling system for waste heat of raw coke oven gas |
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| CN209797845U true CN209797845U (en) | 2019-12-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109679668A (en) * | 2019-02-02 | 2019-04-26 | 中钢集团鞍山热能研究院有限公司 | A kind of waste heat of coke oven crude gas limit recoverying and utilizing method and system |
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2019
- 2019-02-02 CN CN201920185707.2U patent/CN209797845U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109679668A (en) * | 2019-02-02 | 2019-04-26 | 中钢集团鞍山热能研究院有限公司 | A kind of waste heat of coke oven crude gas limit recoverying and utilizing method and system |
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