CN218465751U - Device for treating tar in raw gas - Google Patents

Device for treating tar in raw gas Download PDF

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CN218465751U
CN218465751U CN202222702142.5U CN202222702142U CN218465751U CN 218465751 U CN218465751 U CN 218465751U CN 202222702142 U CN202222702142 U CN 202222702142U CN 218465751 U CN218465751 U CN 218465751U
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gas
temperature
inlet
outlet
heat
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朱子霖
马春元
申海涛
朱振坤
宋德升
潘峰
张广海
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Shandong Xianghuan Environmental Technology Co ltd
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Shandong Xianghuan Environmental Technology Co ltd
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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
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Abstract

The utility model discloses a device for processing crude gas tar, which relates to the technical field of crude gas filtration and comprises a heat accumulating type reforming furnace, wherein the heat accumulating type reforming furnace is internally lined with a ceramic heat accumulator, and a gas burner is connected outside the heat accumulating type reforming furnace; a gas inlet of the gas burner is connected with the reformed gas storage tank, a combustion-supporting air inlet of the gas burner is connected with a high-temperature air outlet of the heat exchanger, and a flue gas outlet of the heat accumulating type reforming furnace is connected with a high-temperature flue gas inlet of the heat exchanger; a high-temperature reformed gas outlet of the heat accumulating type reforming furnace is connected with a high-temperature reformed gas inlet of the waste heat boiler; the low-temperature reformed gas outlet of the waste heat boiler is connected with the reformed gas inlet of the gas purification device. The ceramic heat accumulator can increase the cracking temperature of tar to 1300 ℃, and can directly crack the tar without using auxiliary chemical agents such as catalysts and the like.

Description

Device for treating tar in raw gas
Technical Field
The utility model relates to a raw coke oven gas filters technical field, concretely relates to is used for raw coke oven gas tar processing apparatus.
Background
The coke oven crude gas is a byproduct in the coking process, the temperature of the coke oven gas generated in a coking chamber of the coke oven is 750-850 ℃, wherein tar in the coke oven gas exists in a gaseous state at the temperature, and the content can reach 80g/m 3 -120g/m 3 . The high boiling point tar can be condensed in the pipeline and combined with dust, and the high boiling point tar is accumulated in the pipeline to block the pipeline. In addition, the tar component contains toxic substances, which threatens the health of personnel in the whole production system. Tar contains a large amount of acidic phenolic substances, and is likely to cause secondary pollution of wastewater, so that tar removal is required.
The prior art is that a coal tar quality stabilizing component is arranged in a furnace, a carbonization adsorption area is arranged in the quality stabilizing component, the coal tar fraction temperature is narrowed, only the coal tar part can be reformed, and the full decomposition and the complete treatment of the coal tar can not be realized.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a device for processing the tar in the raw coke oven gas, which can provide the high temperature of 1100-1400 ℃, heat the tar to 1000-1300 ℃, ensure the sufficient secondary cracking of the tar and fully process the tar; and in the combustion and heat storage process of the heat storage furnace, a large amount of deposited carbon generated in the tar cracking process can be effectively removed.
In order to achieve the above purpose, the present invention is realized by the following technical solution:
the embodiment of the utility model provides a device for processing crude gas tar, which comprises a heat accumulating type reforming furnace, wherein the inner lining of the heat accumulating type reforming furnace is connected with a ceramic heat accumulator, and a gas burner is connected outside the heat accumulating type reforming furnace; a gas inlet of the gas burner is connected with the reformed gas storage tank, a combustion-supporting air inlet of the gas burner is connected with a high-temperature air outlet of the heat exchanger, and a flue gas outlet of the heat accumulating type reforming furnace is connected with a high-temperature flue gas inlet of the heat exchanger; a high-temperature reformed gas outlet of the heat accumulating type reforming furnace is connected with a high-temperature reformed gas inlet of the waste heat boiler; the low-temperature reformed gas outlet of the waste heat boiler is connected with the reformed gas inlet of the gas purification device.
As a further implementation mode, the device also comprises a reformed gas storage tank, and a gas inlet of the reformed gas storage tank is connected with a reformed gas outlet of the gas purification device.
As a further implementation mode, the system further comprises a flue gas purification device, and a flue gas inlet of the flue gas purification device is connected with a low-temperature flue gas outlet of the heat exchanger.
As a further implementation, the flue gas outlet of the flue gas purification device is connected with a discharge chimney.
As a further implementation mode, the regenerative reforming furnace is provided with a nitrogen inlet, a tar-containing gas inlet, a flue gas outlet and a high-temperature reformed gas outlet.
As a further realization mode, the gas burner is provided with a combustion air inlet and a gas inlet.
As a further implementation mode, the waste heat boiler is provided with a high-temperature reformed gas inlet, a low-temperature reformed gas outlet, a water inlet and a steam outlet.
As a further realization mode, the coal gas purification device is provided with a reformed coal gas inlet and a reformed coal gas outlet.
As a further implementation mode, the heat exchanger is provided with a high-temperature flue gas inlet, a high-temperature air outlet, a low-temperature air inlet and a low-temperature flue gas outlet.
As a further implementation mode, the reformed gas storage tank is provided with a gas inlet and a gas outlet, and the gas outlet is connected with the pressure regulating device.
As a further implementation mode, a low-temperature reformed gas outlet of the waste heat boiler is connected with a low-temperature reformed gas pipeline, and a nitrogen outlet is formed in the low-temperature reformed gas pipeline.
The utility model has the advantages as follows:
(1) The heat accumulating type reforming furnace of the utility model has the advantages that the lining of the heat accumulating type reforming furnace is connected with the ceramic heat accumulator, the cracking temperature of tar can be raised to 1300 ℃ by the ceramic heat accumulator, auxiliary chemical agents such as catalysts and the like are not needed, and the tar is directly cracked to realize full treatment; the heat accumulating type reforming furnace is connected with a waste heat boiler, the waste heat boiler is connected with a coal gas purification device, and the reformed coal gas cooled by the waste heat boiler passes through the coal gas purification device to remove impurities such as dust deposition carbon carried in the gas.
(2) The utility model discloses heat accumulation formula reforming furnace is connected with the heat exchanger, and the combustion air entry of connecting the gas burner outside the heat accumulation formula reforming furnace is connected with the high temperature air exit of heat exchanger, and the exhanst gas outlet through heat accumulation formula reforming furnace is connected with the high temperature flue gas entry of heat exchanger, realizes that the flue gas that discharges heat accumulation formula reforming furnace enters into the heat exchanger heat transfer back, preheats combustion air to 300- -500 ℃, and the combustion air after preheating is retrieved again and is let in combustor boosting burning.
(3) The utility model discloses heat accumulation formula reformer is equipped with the nitrogen gas entry, is equipped with the nitrogen gas export on exhaust-heat boiler low temperature reforming gas pipeline, heat accumulation formula reformer is between heat accumulation and heat release each time, all will carry out a nitrogen gas and sweep, prevents the oxygen contact in coal gas and the flue gas, produces explosion danger.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic overall structure diagram of the present invention according to one or more embodiments;
the system comprises a heat accumulating type reforming furnace 1, a gas burner 2, a reformed gas storage tank 3, a heat exchanger 4, a waste heat boiler 5, a gas purification device 6 and a flue gas purification device 7.
Detailed Description
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides a raw coke oven gas tar treatment device, which includes a regenerative reforming furnace 1, a gas burner 2, a reformed gas storage tank 3, a heat exchanger 4, a waste heat boiler 5, a gas purification device 6, and a flue gas purification device 7.
The heat accumulating type reforming furnace 1 is respectively connected with a gas burner 2 and a waste heat boiler 5; one side of a waste heat boiler 5 is connected with the heat accumulating type reforming furnace 1, the other side of the waste heat boiler is connected with one side of a coal gas purification device 6, the other side of the coal gas purification device 6 is connected with one side of a reformed coal gas storage tank 3, and the other side of the reformed coal gas storage tank 3 is connected with a coal gas burner 2; the gas burner 2 is connected with a heat accumulating type reforming furnace 1 and a reformed gas storage tank 3, and is also connected with a heat exchanger 4; the heat exchanger 4 is connected with the gas burner 2, the regenerative reforming furnace 1 and the flue gas purification device 7, and the flue gas purification device 7 is connected with the exhaust chimney.
A nitrogen inlet, a tar-containing gas inlet, a flue gas outlet and a high-temperature reformed gas outlet are arranged in the heat accumulating type reforming furnace 1.
The outer side of the heat accumulating type reforming furnace 1 is connected with a gas burner, and the gas burner is provided with a combustion-supporting air inlet and a gas inlet.
The waste heat boiler 5 is provided with a high-temperature reformed gas inlet, a low-temperature reformed gas outlet, a water inlet and a steam outlet.
The gas purification device 6 is provided with a reformed gas inlet and a reformed gas outlet.
The heat exchanger 4 is provided with a high-temperature flue gas inlet, a high-temperature air outlet, a low-temperature air inlet and a low-temperature flue gas outlet.
The reformed gas storage tank 3 is provided with a gas inlet and a gas outlet.
The flue gas cleaning device 7 comprises a flue gas inlet and a flue gas outlet.
The ceramic heat accumulator is connected with the inner liner of the heat accumulating type reforming furnace 1, the ceramic heat accumulator can bear the high temperature of 1300 ℃, the pyrolysis gas containing tar is introduced into the heat accumulating type reforming furnace, the pyrolysis gas containing tar is heated to 1000-1300 ℃, the tar in the coal gas is subjected to cracking reaction, and the coal gas is subjected to reforming reaction. The tar is cracked into C and C under the action of high temperature n H m 、H 2 、CO、CH 4 、CO 2 . At the same time, C n H m 、CH 4 Cracking to generate C and H 2 ，H 2O Reacting with C to generate CO and H 2 . Wherein, C n H m Is an alkane, alkene or alkyne.
The high-temperature reformed gas outlet of the heat accumulating type reforming furnace 1 is connected with the high-temperature reformed gas inlet of the waste heat boiler 5, so that the high-temperature gas in the heat accumulating type reforming furnace enters the waste heat boiler to be cooled, the temperature is reduced from 1000-1300 ℃ to 60-100 ℃, the heat recovered in the waste heat boiler is used for generating a large amount of water vapor, the water vapor is communicated with the outside through the water vapor outlet, and the water vapor is used as heat for supplying to the outside.
A nitrogen inlet is arranged in the heat accumulating type reforming furnace 1, a low-temperature reformed gas outlet is arranged in the waste heat boiler 5, the low-temperature reformed gas outlet of the waste heat boiler 5 is connected with a low-temperature reformed gas pipeline, and the low-temperature reformed gas pipeline is provided with a nitrogen outlet. The nitrogen inlet is arranged in the heat accumulating type reforming furnace 1, and the low-temperature reformed gas outlet is arranged in the waste heat boiler 5, so that when the heat accumulating type reforming furnace is stopped from being continuously fed with hot flue gas, the nitrogen inlet is opened, nitrogen is fed into the heat accumulating type reforming furnace, the furnace is blown, residual flue gas in the furnace is blown clean, the nitrogen outlet is opened, and the flue gas and the nitrogen for blowing are discharged out of the system.
One end of the waste heat boiler 5 is connected with the heat accumulating type reforming furnace 1, the other end of the waste heat boiler 5 is connected with a reformed gas inlet of a gas purifying device 6 through a low-temperature reformed gas outlet of the waste heat boiler 5, the cooled reformed gas in the waste heat boiler 5 is purified through the gas purifying device 6, impurities such as dust, deposited carbon and the like carried in the gas are removed, and the reformed gas is further filtered.
In the embodiment, two heat accumulating type reforming furnaces 1 and two waste heat boilers 5 are adopted, and the supports of the two heat accumulating type reforming furnaces 1 alternately operate, so that the tar-containing gas can be continuously and stably reformed and purified in the whole system, and the whole system is ensured to operate stably. And the heat accumulating type reforming furnace circularly operates according to the flow of heat accumulation, blowing, heat release, blowing and heat accumulation.
One end of a coal gas purifying device 6 is connected with the waste heat boiler 5, the other end is connected with the reformed gas storage tank 3, and a reformed gas outlet of the coal gas purifying device is connected with a gas inlet of the reformed gas storage tank 3. The gas purified by the gas purifying device 6 is buffered by a reformed gas storage tank, and the gas is used as a buffering device of the gas to enable a gas system to have certain pressure elasticity. The gas storage temperature of the gas storage tank is usually about 0-70 ℃, and a pressure regulating device, such as a booster fan and the like, can be arranged at the outlet of the gas storage tank to regulate the output pressure of the gas of the reformed gas storage tank 3.
The gas outlet of the reformed gas storage tank 3 is connected to the gas inlet of the gas burner, the gas inlet of the gas burner 2 is connected with the reformed gas storage tank 3, part of the gas with the pressure regulated by the reformed gas storage tank 3 is used as fuel for the gas burner 2 in the system, and the rest part of the gas is supplied to the outside, so that the gas in the heat accumulating type reforming furnace 1 is recycled after being reformed and purified.
And after the reformed gas and the preheated combustion-supporting air are introduced into the gas burner 2 for ignition, the gas temperature is regulated to 1200-1500 ℃, the gas temperature is maintained for a certain time, the high-temperature region of the heat accumulator temperature is increased to 1100-1400 ℃, and the low-temperature region is increased to 500-600 ℃.
The high-temperature air outlet of the heat exchanger 4 is connected with the combustion-supporting air inlet of the gas burner 2, the high-temperature air in the heat exchanger 4 enters the gas burner 2 to be used as combustion-supporting air, and the gas and the combustion-supporting air in the gas burner 2 are ignited to realize the adjustment of the flue gas temperature.
The low-temperature air inlet of the heat exchanger 4 is communicated with the outside, low-temperature air is conveyed into the heat exchanger 4 through the outside for heat exchange, and high-temperature air is output into the gas burner 2 as combustion-supporting air through low-temperature heat exchange in the heat exchanger 4. The heat exchanger 4 can recover heat in the flue gas, reduce the flue gas emission temperature, improve the heat utilization rate, preheat combustion air and save fuel.
A high-temperature flue gas inlet of the heat exchanger 4 is connected with a flue gas outlet of the heat accumulating type reforming furnace 1; the connection of the heat accumulating type reforming furnace 1 and the heat exchanger 4 aims to realize that the flue gas at 500-600 ℃ discharged by the heat accumulating type reforming furnace 1 is preheated to 300-500 ℃ by the metal heat exchanger, the combustion-supporting air at about 30 ℃ is preheated to the heat exchanger, the preheated combustion-supporting air is introduced into the combustor for auxiliary combustion after the flue gas in the heat accumulating type reforming furnace 1 is preheated by the heat exchanger.
The low-temperature flue gas outlet of the heat exchanger 4 is connected with the flue gas inlet of the flue gas purification device 7, the low-temperature flue gas output by the heat exchanger 4 is purified by the flue gas purification device 7, and the low-temperature flue gas is discharged after reaching the standard through the discharge chimney connected with the flue gas purification device 7.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A device for processing crude gas tar is characterized by comprising a heat accumulating type reforming furnace, wherein a ceramic heat accumulator is connected to the inner lining of the heat accumulating type reforming furnace, and a gas burner is connected to the outside of the heat accumulating type reforming furnace; a gas inlet of the gas burner is connected with the reformed gas storage tank, a combustion-supporting air inlet of the gas burner is connected with a high-temperature air outlet of the heat exchanger, and a flue gas outlet of the heat accumulating type reforming furnace is connected with a high-temperature flue gas inlet of the heat exchanger; a high-temperature reformed gas outlet of the heat accumulating type reforming furnace is connected with a high-temperature reformed gas inlet of the waste heat boiler; the low-temperature reformed gas outlet of the waste heat boiler is connected with the reformed gas inlet of the gas purification device.
2. The crude gas tar treatment apparatus according to claim 1, further comprising a reformed gas storage tank, wherein a gas inlet of the reformed gas storage tank is connected to a reformed gas outlet of the gas purification apparatus.
3. The raw gas tar treatment device according to claim 1, further comprising a flue gas purification device, wherein a flue gas inlet of the flue gas purification device is connected to the low-temperature flue gas outlet of the heat exchanger.
4. The raw gas tar treatment apparatus as claimed in claim 3, wherein the flue gas outlet of the flue gas purification apparatus is connected to a discharge chimney.
5. The raw coke oven gas tar treatment apparatus as claimed in claim 1, wherein the regenerative reformer is provided with a nitrogen inlet, a tar-containing gas inlet, a flue gas outlet and a high temperature reformed gas outlet.
6. The crude gas tar treatment apparatus according to claim 1, wherein the gas burner is provided with a combustion air inlet and a gas inlet.
7. The device for processing the tar in the raw gas according to claim 1, wherein the exhaust-heat boiler is provided with a high-temperature reformed gas inlet, a low-temperature reformed gas outlet, a water inlet and a steam outlet, the low-temperature reformed gas outlet of the exhaust-heat boiler is connected with a low-temperature reformed gas pipeline, and the low-temperature reformed gas pipeline is provided with a nitrogen outlet.
8. The raw gas tar treatment apparatus as claimed in claim 1, wherein the gas purification apparatus is provided with a reformed gas inlet and a reformed gas outlet.
9. The crude gas tar treatment apparatus as claimed in claim 1, wherein the heat exchanger has a high temperature flue gas inlet, a high temperature air outlet, a low temperature air inlet, and a low temperature flue gas outlet.
10. The raw gas tar treatment device as claimed in claim 1, wherein the reformed gas storage tank is provided with a gas inlet and a gas outlet, and the gas outlet is connected with the pressure regulating device.
CN202222702142.5U 2022-10-13 2022-10-13 Device for treating tar in raw gas Active CN218465751U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202222702142.5U CN218465751U (en) 2022-10-13 2022-10-13 Device for treating tar in raw gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202222702142.5U CN218465751U (en) 2022-10-13 2022-10-13 Device for treating tar in raw gas

Publications (1)

Publication Number Publication Date
CN218465751U true CN218465751U (en) 2023-02-10

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Application Number Title Priority Date Filing Date
CN202222702142.5U Active CN218465751U (en) 2022-10-13 2022-10-13 Device for treating tar in raw gas

Country Status (1)

Country Link
CN (1) CN218465751U (en)

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