CN214781638U - Air preheating structure arranged in coke oven - Google Patents
Air preheating structure arranged in coke oven Download PDFInfo
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- CN214781638U CN214781638U CN202120633717.5U CN202120633717U CN214781638U CN 214781638 U CN214781638 U CN 214781638U CN 202120633717 U CN202120633717 U CN 202120633717U CN 214781638 U CN214781638 U CN 214781638U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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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 an air preheating structure arranged in a coke oven, which comprises an air channel; the air channel and the coke oven branch flue are arranged side by side; an air inlet is arranged at one end of the air channel close to the coke oven chimney and is connected with one end of an air channel inlet pipeline, the other end of the air channel inlet pipeline extends to the upper part of the ground, and the air inlet of the air channel inlet pipeline is communicated with the atmosphere; the other end of the air channel is provided with a preheated air outlet which is connected with a preheated air outlet pipeline. The utility model utilizes the waste gas of the coke oven flue to heat the air in the air channel, the heated air is sent to the coal tower bucket mouth by the fan, the hot air is used to keep the temperature of the coal tower bucket mouth and the emptying device, or the heated air is sent to the air suction inlet in the dry quenching gas circulation system, and the preheated air is used to burn the combustible components in the circulating gas; the air preheating structure is also beneficial to reducing the temperature of the basement of the coke oven and improving the operating environment of the basement.
Description
Technical Field
The utility model relates to a coal coking energy saving and consumption reduction technical field especially relates to an air preheating structure of locating in coke oven.
Background
The temperature of the coke oven flue gas is about 230 ℃, and part of the heat can be utilized on the premise of not influencing the emission of a chimney. If the waste gas of the coke oven flue is considered to preheat the air, the temperature of the flue wall can be reduced, the operation environment of the basement of the coke oven can be improved, and the hot air can be further utilized. In the coke oven area, there are two locations where hot air is required, one is the coal tower (northern cold district) and the other is the air intake duct in the dry quenching gas circulation system.
The water content of the blended coal in the coal tower of the coke oven is about 10 percent, and heat insulation measures must be taken for a coal tower bucket mouth in northern cold regions to prevent the coal from freezing. The traditional coal tower hopper mouth adopts heating media such as steam, coal gas, flue waste gas and the like for heat preservation, or adopts modes such as electric heat tracing and the like, but the using effect is not ideal. The steam is easy to freeze after being condensed, the coal gas has potential safety hazard for fire extinguishing, and the heating temperature of the coal gas is high, so that the coal material near the outer wall of the coal tower hopper mouth is easy to be carbonized and hardened; the flue waste gas contains harmful gases such as carbon monoxide and the like, so that potential safety hazards exist; for the coal tower emptying devices with irregular shapes, electric heat tracing is difficult to implement and the heat preservation effect is not good.
An air suction pipe in a dry quenching gas circulation system is generally used for sucking normal temperature air to burn combustible components in dry quenching, and the normal temperature air has a preheating process after entering the dry quenching, so that H in the circulation gas2Can only be controlled to be about 3 percent, CO can only be controlled to be about 6 percent, if preheated air is adopted to be introduced into dry quenching coke, the combustion will be more sufficient, not only H2The concentration of CO and the coke can be effectively reduced, and the coke can be produced by dry quenchingMore steam is generated.
Disclosure of Invention
The utility model provides an air preheating structure arranged in a coke oven, which utilizes the waste gas of a coke oven flue to heat the air in an air channel, the heated air is sent to a coal tower bucket mouth by a fan, the hot air is used for preserving the heat of the coal tower bucket mouth and a discharging device, or the heated air is sent to an air suction inlet in a dry quenching gas circulating system, and the preheated air is used for combusting combustible components in the circulating gas; the air preheating structure is also beneficial to reducing the temperature of the basement of the coke oven and improving the operating environment of the basement.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an air preheating structure arranged in a coke oven comprises an air channel; the air channel and the coke oven branch flue are arranged side by side; an air inlet is arranged at one end of the air channel close to the coke oven chimney and is connected with one end of an air channel inlet pipeline, the other end of the air channel inlet pipeline extends to the upper part of the ground, and the air inlet of the air channel inlet pipeline is communicated with the atmosphere; the other end of the air channel is provided with a preheated air outlet which is connected with a preheated air outlet pipeline.
The air channel and the coke oven smoke distributing channel are integrally built and formed when the coke oven body is built.
The top of the air channel is flush with the top of the coke oven branch flue, the part of the air channel above the elevation of the basement of the coke oven is arranged between the pipeline system at the corresponding side of the coke oven and the coke oven branch flue, and the part of the air channel below the elevation of the basement of the coke oven extends to the lower part of the pipeline system at the corresponding side of the coke oven.
A multilayer heat exchange structure is arranged in the air channel along the height direction; each layer of heat exchange structure consists of a plurality of heat exchange fins and a cross brace, the two ends of the cross brace are fixedly connected with the side walls of the two sides of the air channel respectively, and the plurality of heat exchange fins are longitudinally arranged on the upper edge of the cross brace.
The cross braces and the heat exchange fins are all steel components.
The air inlet of the air channel inlet pipeline is horizontally arranged, and a grate is arranged at the air inlet.
And a preheated air outlet of the preheated air outlet pipeline is connected with a coal tower hopper nozzle and a heat preservation gas inlet of the discharging device or connected with an air suction inlet of a dry quenching gas circulating system, and a fan is arranged on the preheated air outlet pipeline.
The fan and the preheated air outlet pipeline are provided with heat insulation structures; the preheated air outlet pipeline is provided with a gas regulating valve, a compensator, a flowmeter, a temperature measuring device and a pressure measuring device.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the waste heat utilization of the coke oven flue gas is realized.
2) The temperature of the basement of the coke oven is reduced, and the working environment is improved;
3) the preheated air can be used for preserving the heat of the coal tower hopper nozzle and the emptying device, and compared with the conventional heating medium, the preheated air has the advantages that firstly, the hot air is nontoxic and harmless, and no condensed water is generated; secondly, the temperature of the hot air is not high, so that the coal material is not carbonized and hardened;
4) the preheated air can be used for air sucked in a dry quenching gas circulation system, and compared with the air sucked at normal temperature, the air has the advantages that the combustible components in the dry quenching can be combusted more fully; and the amount of steam generated by the dry quenching boiler is increased.
Drawings
FIG. 1 is a schematic structural diagram of an air preheating structure provided in a coke oven according to the present invention.
Fig. 2 is a rotated view a-a in fig. 1.
In the figure: 1. coke oven branch flue 2, air duct 3, basement pipeline system 4, air duct inlet pipeline 5, preheated air outlet pipeline 6, heat exchange structure
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 and fig. 2, the air preheating structure provided in the coke oven of the present invention includes an air passage 2; the air channel 2 and the coke oven sub-flue 1 are arranged side by side; an air inlet is arranged at one end of the air channel 2 close to the coke oven chimney and is connected with one end of an air channel inlet pipeline 4, the other end of the air channel inlet pipeline 4 extends to the upper part of the ground, and the air inlet of the air channel inlet pipeline 4 is communicated with the atmosphere; the other end of the air channel 2 is provided with a preheated air outlet which is connected with a preheated air outlet pipeline 5.
The air channel 2 and the coke oven sub-flue 1 are integrally built and formed when the coke oven body is built.
The top of the air channel 2 is flush with the top of the coke oven sub-flue 1, the part of the air channel 2 above the elevation of the coke oven basement is between the pipeline system at the corresponding side of the coke oven and the coke oven sub-flue 1, and the part of the air channel 2 below the elevation of the coke oven basement extends to the lower part of the pipeline system at the corresponding side of the coke oven.
A multilayer heat exchange structure 6 is arranged in the air channel 2 along the height direction; each layer of heat exchange structure 6 consists of a plurality of heat exchange fins and a cross brace, the two ends of the cross brace are fixedly connected with the side walls at the two sides of the air channel 2 respectively, and the cross brace is longitudinally provided with a plurality of heat exchange fins.
The cross braces and the heat exchange fins are all steel components.
The air inlet of the air channel inlet pipeline 4 is horizontally arranged, and a grate is arranged at the air inlet.
And a preheated air outlet of the preheated air outlet pipeline 5 is connected with a coal tower hopper nozzle and a heat preservation gas inlet of a discharging device or connected with an air suction inlet of a dry quenching gas circulating system, and a fan is arranged on the preheated air outlet pipeline 5.
The fan and the preheated air outlet pipeline 5 are provided with heat insulation structures; the preheated air outlet pipeline 5 is provided with a gas regulating valve, a compensator, a flowmeter, a temperature measuring device and a pressure measuring device.
The design and the working principle of the air preheating structure in the coke oven are as follows:
an air channel is arranged on one side of the coke oven smoke-dividing channel close to the basement of the coke oven, and the part of the air channel above the ground has a small width due to space limitation, thereby not only playing a role in heat exchange, but also playing a role in heat insulation and reducing the temperature of the side wall of the flue of the basement; the section area of the part of the air channel under the ground is larger, the air flow resistance can be reduced, and in order to increase the heat exchange efficiency, a heat exchange device can be arranged in the air channel to increase the heat exchange area. The air inlet of the air channel is arranged at one end close to the coke oven chimney to suck air with higher temperature, and the preheated air outlet of the air channel is arranged at one end far away from the coke oven chimney. The flowing direction of the air in the air channel is opposite to the flowing direction of the waste gas in the coke oven sub-flue, the countercurrent heat exchange is carried out, and the air in the air channel generates flowing power through the fan.
The preheated air heated by the air channel is sent to a coal tower hopper nozzle and a discharge device by a fan through a preheated air outlet pipeline or is sent to an air suction inlet of a dry quenching gas circulation system. The fan and the air channel outlet pipeline need to be subjected to heat preservation treatment, and necessary processes and instrument equipment such as an adjusting valve, a compensator, a flowmeter, a temperature measuring device, a pressure measuring device and the like are arranged on the air channel outlet pipeline.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (8)
1. An air preheating structure arranged in a coke oven is characterized by comprising an air channel; the air channel and the coke oven branch flue are arranged side by side; an air inlet is arranged at one end of the air channel close to the coke oven chimney and is connected with one end of an air channel inlet pipeline, the other end of the air channel inlet pipeline extends to the upper part of the ground, and the air inlet of the air channel inlet pipeline is communicated with the atmosphere; the other end of the air channel is provided with a preheated air outlet which is connected with a preheated air outlet pipeline.
2. The air preheating structure in the coke oven according to claim 1, wherein the air duct is integrally formed with the flue of the coke oven when the coke oven body is constructed.
3. The air preheating structure in the coke oven according to claim 1, wherein the top of the air duct is flush with the top of the branch flue of the coke oven, the portion of the air duct above the level of the basement of the coke oven is between the corresponding side piping system of the coke oven and the branch flue of the coke oven, and the portion of the air duct below the level of the basement of the coke oven extends to the lower portion of the corresponding side piping system of the coke oven.
4. The air preheating structure in the coke oven according to claim 1, 2 or 3, wherein a plurality of layers of heat exchange structures are arranged in the air passage along the height direction; each layer of heat exchange structure consists of a plurality of heat exchange fins and a cross brace, the two ends of the cross brace are fixedly connected with the side walls of the two sides of the air channel respectively, and the plurality of heat exchange fins are longitudinally arranged on the upper edge of the cross brace.
5. The air preheating structure in a coke oven according to claim 4, wherein the cross-brace and the heat exchange fin are both steel members.
6. The air preheating structure in a coke oven according to claim 1, wherein the air inlet of the air duct inlet duct is horizontally disposed, and a grate is disposed at the air inlet.
7. The air preheating structure in the coke oven as claimed in claim 1, wherein the preheated air outlet of the preheated air outlet pipeline is connected with the coal tower nozzle and the heat preservation gas inlet of the emptying device, or connected with the air suction inlet of the dry quenching gas circulation system, and the preheated air outlet pipeline is provided with a fan.
8. The air preheating structure in the coke oven according to claim 7, wherein the blower and the preheated air outlet pipeline are provided with a heat insulation structure; the preheated air outlet pipeline is provided with a gas regulating valve, a compensator, a flowmeter, a temperature measuring device and a pressure measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120633717.5U CN214781638U (en) | 2021-03-29 | 2021-03-29 | Air preheating structure arranged in coke oven |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120633717.5U CN214781638U (en) | 2021-03-29 | 2021-03-29 | Air preheating structure arranged in coke oven |
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| CN214781638U true CN214781638U (en) | 2021-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120633717.5U Active CN214781638U (en) | 2021-03-29 | 2021-03-29 | Air preheating structure arranged in coke oven |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025350A (en) * | 2021-03-29 | 2021-06-25 | 中冶焦耐(大连)工程技术有限公司 | Air preheating structure arranged in coke oven |
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2021
- 2021-03-29 CN CN202120633717.5U patent/CN214781638U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025350A (en) * | 2021-03-29 | 2021-06-25 | 中冶焦耐(大连)工程技术有限公司 | Air preheating structure arranged in coke oven |
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