CN209901011U - Coke oven gas desulfurization regeneration tower tail gas treatment system - Google Patents
Coke oven gas desulfurization regeneration tower tail gas treatment system Download PDFInfo
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- CN209901011U CN209901011U CN201920075133.3U CN201920075133U CN209901011U CN 209901011 U CN209901011 U CN 209901011U CN 201920075133 U CN201920075133 U CN 201920075133U CN 209901011 U CN209901011 U CN 209901011U
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Abstract
The utility model relates to a tail gas treatment system of a coke oven gas desulfurization regeneration tower.A gas phase outlet of the desulfurization regeneration tower is connected with a gas-liquid mixture inlet of a gas-liquid separator, a liquid phase outlet at the bottom of the gas-liquid separator is connected with an inlet end of a pump, and an outlet end of the pump is connected with a separation liquid inlet of the desulfurization regeneration tower; a gas phase outlet at the top of the gas-liquid separator is connected with an inlet end of a gas supercharging device, an outlet end of the gas supercharging device is connected with a mixing pipeline through a circulating gas pipeline, and a supplementary oxidizing gas inlet is arranged on the circulating gas pipeline; the mixing pipeline is also provided with a desulfurization rich solution inlet, and the outlet of the mixing pipeline is connected with a rich solution and oxidizing gas inlet at the bottom of the desulfurization regeneration tower. The utility model discloses the oxidizing gas who will be used for desulfurization pregnant solution oxidation regeneration recycles to realize that the system does not have the gas production that diffuses, finally reach the purpose that desulfurization regeneration tower does not have exhaust emissions.
Description
Technical Field
The utility model relates to a coke oven gas purifies technical field, especially relates to a coke oven gas desulfurization regenerator column tail gas treatment system.
Background
The removal of hydrogen sulfide from coke oven gas is an important process of a gas purification process. The wet oxidation method is a common process for removing hydrogen sulfide in raw coke oven gas, has the advantages of investment saving, high desulfurization efficiency, low operation cost and the like, and is mostly adopted by domestic coking enterprises at present.
When the wet oxidation method is adopted to remove the hydrogen sulfide in the raw gas, a large amount of air is introduced into the bottom of the desulfurization regeneration tower to oxidize and regenerate the desulfurization rich solution, and the excessive air passes through the desulfurization regeneration tower to become tail gas which is diffused at the top of the tower. The specific process is as follows: and after the desulfurization rich solution and the air are mixed, the mixture enters a desulfurization regeneration tower from the bottom, HS-is oxidized into elemental sulfur while the rich solution entering the desulfurization regeneration tower and a large amount of air flow upwards, and the desulfurization rich solution is converted into a desulfurization lean solution. The desulfurized lean solution is extracted at a desulfurized lean solution outlet and sent to a desulfurization part for recycling. Elemental sulfur generated by oxidation is bubbled by a large amount of air to form sulfur foam, the elemental sulfur overflows at a foam sulfur outlet in the form of sulfur foam, and a large amount of air escapes from a gas-phase outlet at the top of the desulfurization regeneration tower to form diffused gas.
The tail gas emitted from the top of the desulfurization regeneration tower contains a certain amount of harmful gases such as hydrogen sulfide, hydrogen cyanide, ammonia and the like, and along with the increasingly strict national requirements on environmental protection, the tail gas of the desulfurization regeneration tower is not allowed to directly enter the atmosphere and can be emitted after being treated to reach the emission standard. At present, a tail gas treatment facility is required to be added in a coke oven gas desulfurization system adopting a wet oxidation process, so that a series of problems of large occupied area, high device investment, increased operating cost and the like are caused.
Disclosure of Invention
The utility model provides a coke oven gas desulfurization regeneration tower tail gas processing system will be used for the oxidative gas of desulfurization rich solution oxidation regeneration to carry out the recycle to realize that the system does not have the gas production that diffuses, finally reach the purpose that desulfurization regeneration tower does not have exhaust emissions.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a tail gas treatment system of a coke oven gas desulfurization regeneration tower comprises a desulfurization regeneration tower, a gas-liquid separator, a gas supercharging device and a pump; the top of the desulfurization regeneration tower is provided with a gas phase outlet, and the upper part of the desulfurization regeneration tower is provided with a desulfurization barren solution outlet and a sulfur foam outlet; the middle part of the desulfurization regeneration tower is provided with a separation liquid inlet, and the bottom of the desulfurization regeneration tower is provided with a rich liquid and oxidizing gas inlet; a gas-phase outlet of the desulfurization regeneration tower is connected with a gas-liquid mixture inlet of a gas-liquid separator, a liquid-phase outlet at the bottom of the gas-liquid separator is connected with an inlet end of a pump, and an outlet end of the pump is connected with a separation liquid inlet of the desulfurization regeneration tower; a gas phase outlet at the top of the gas-liquid separator is connected with an inlet end of a gas supercharging device, an outlet end of the gas supercharging device is connected with a mixing pipeline through a circulating gas pipeline, and a supplementary oxidizing gas inlet is arranged on the circulating gas pipeline; the mixing pipeline is also provided with a desulfurization rich solution inlet, and the outlet of the mixing pipeline is connected with a rich solution and oxidizing gas inlet at the bottom of the desulfurization regeneration tower.
The gas supercharging device is a fan, a gas supercharging pump or a gas supercharging valve.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the oxidizing gas used for the oxidation regeneration of the desulfurization rich solution is recycled, so that no diffused gas is generated in the system, and the aim of no tail gas emission of the desulfurization regeneration tower is fulfilled;
2) compared with the conventional tail gas treatment process, the method has the advantages of small additionally-increased occupied area, convenient operation, low investment and low operating cost.
Drawings
FIG. 1 is a schematic structural diagram of a tail gas treatment system of a coke oven gas desulfurization regeneration tower of the present invention.
In the figure: 1. a desulfurization regeneration tower 2, a desulfurization rich solution inlet 3, a recycle gas pipeline 4, a desulfurization lean solution outlet 5, a sulfur foam outlet 6, a mixing pipeline 7, a supplementary oxidizing gas inlet 8, a gas-liquid separator 9, a gas supercharging device 10, a mist catching layer 11, a pump 12 and a separation solution inlet
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 tail gas treatment system of the coke oven gas desulfurization regeneration tower of the present invention comprises a desulfurization regeneration tower 1, a gas-liquid separator 8, a gas supercharging device 9 and a pump 11; the top of the desulfurization regeneration tower 1 is provided with a gas phase outlet, and the upper part of the desulfurization regeneration tower 1 is provided with a desulfurization barren solution outlet 4 and a sulfur foam outlet 5; the middle part of the desulfurization regeneration tower 1 is provided with a separation liquid inlet 12, and the bottom of the desulfurization regeneration tower 1 is provided with a rich liquid and oxidizing gas inlet; a gas-phase outlet of the desulfurization regeneration tower 1 is connected with a gas-liquid mixture inlet of a gas-liquid separator 8, a liquid-phase outlet at the bottom of the gas-liquid separator 8 is connected with an inlet end of a pump 11, and an outlet end of the pump 11 is connected with a separation liquid inlet 12 of the desulfurization regeneration tower 1; a gas phase outlet at the top of the gas-liquid separator 8 is connected with an inlet end of a gas supercharging device 9, an outlet end of the gas supercharging device 9 is connected with a mixing pipeline 6 through a circulating gas pipeline 3, and a supplementary oxidizing gas inlet is arranged on the circulating gas pipeline 3; the mixing pipeline 6 is also provided with a desulfurization rich solution inlet 2, and the outlet of the mixing pipeline 6 is connected with a rich solution and oxidizing gas inlet at the bottom of the desulfurization regeneration tower 1.
The gas supercharging device 9 is a fan, a gas booster pump or a gas booster valve.
The technical process of the tail gas treatment system of the coke oven gas desulfurization regeneration tower is as follows:
1) after the desulfurization rich solution in the desulfurization regeneration tower 1 is oxidized and regenerated, a large amount of oxidizing gas escapes from a gas phase outlet at the top of the tower and enters a gas-liquid separator 8;
2) the top of the gas-liquid separator 8 is provided with a mist catching layer 10, and droplets caught by the mist catching layer 10 are discharged from a liquid phase outlet at the bottom of the gas-liquid separator 10, pressurized by a pump 11 and then returned to the desulfurization regeneration tower 1; the separated gas phase is a circulating oxidizing gas, escapes from a gas phase outlet at the top of the gas-liquid separator 8 and enters a gas supercharging device 9;
3) the circulating oxidizing gas is pressurized by the gas pressurizing device 9, then mixed with the supplementary oxidizing gas, mixed with the desulfurization rich solution and then enters the bottom of the desulfurization regeneration tower 1.
The circulating oxidizing gas is air or pure oxygen.
The supplemental oxidizing gas is pure oxygen.
The utility model discloses in, the gaseous phase at 1 top of the tower of desulfurization regenerator is after the 8 separation demisters of vapour and liquid separator, and then through the 9 pressure boost of gas supercharging device, then with supplement 1 cyclic utilization of desulfurization regenerator after the oxidizing gas mixes, the closed loop operation is realized to the system, realizes no exhaust emission's purpose from this.
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 (2)
1. A tail gas treatment system of a coke oven gas desulfurization regeneration tower is characterized by comprising a desulfurization regeneration tower, a gas-liquid separator, a gas supercharging device and a pump; the top of the desulfurization regeneration tower is provided with a gas phase outlet, and the upper part of the desulfurization regeneration tower is provided with a desulfurization barren solution outlet and a sulfur foam outlet; the middle part of the desulfurization regeneration tower is provided with a separation liquid inlet, and the bottom of the desulfurization regeneration tower is provided with a rich liquid and oxidizing gas inlet; a gas-phase outlet of the desulfurization regeneration tower is connected with a gas-liquid mixture inlet of a gas-liquid separator, a liquid-phase outlet at the bottom of the gas-liquid separator is connected with an inlet end of a pump, and an outlet end of the pump is connected with a separation liquid inlet of the desulfurization regeneration tower; a gas phase outlet at the top of the gas-liquid separator is connected with an inlet end of a gas supercharging device, an outlet end of the gas supercharging device is connected with a mixing pipeline through a circulating gas pipeline, and a supplementary oxidizing gas inlet is arranged on the circulating gas pipeline; the mixing pipeline is also provided with a desulfurization rich solution inlet, and the outlet of the mixing pipeline is connected with a rich solution and oxidizing gas inlet at the bottom of the desulfurization regeneration tower.
2. The tail gas treatment system of the coke oven gas desulfurization regeneration tower of claim 1, wherein the gas pressurization device is a fan, a gas pressurization pump or a gas pressurization valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920075133.3U CN209901011U (en) | 2019-01-17 | 2019-01-17 | Coke oven gas desulfurization regeneration tower tail gas treatment system |
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| CN201920075133.3U CN209901011U (en) | 2019-01-17 | 2019-01-17 | Coke oven gas desulfurization regeneration tower tail gas treatment system |
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| CN209901011U true CN209901011U (en) | 2020-01-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109806735A (en) * | 2019-01-17 | 2019-05-28 | 中冶焦耐(大连)工程技术有限公司 | A kind of coke oven gas desulfurization regenerator tail gas treatment process and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109806735A (en) * | 2019-01-17 | 2019-05-28 | 中冶焦耐(大连)工程技术有限公司 | A kind of coke oven gas desulfurization regenerator tail gas treatment process and system |
| WO2020147607A1 (en) * | 2019-01-17 | 2020-07-23 | 中冶焦耐(大连)工程技术有限公司 | Process and system for treating tail gas from desulfurization regeneration tower for coke oven coal gas |
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