CN210127224U - Wet oxidation method desulfurization oxygen sprays regenerating unit - Google Patents
Wet oxidation method desulfurization oxygen sprays regenerating unit Download PDFInfo
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- CN210127224U CN210127224U CN201920662607.4U CN201920662607U CN210127224U CN 210127224 U CN210127224 U CN 210127224U CN 201920662607 U CN201920662607 U CN 201920662607U CN 210127224 U CN210127224 U CN 210127224U
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Abstract
A wet oxidation desulfurization oxygen jet regeneration device comprises a regeneration tank, an ejector, a gas separator and a circulating pump; an inlet of a circulating pump is connected with a desulfurization circulating liquid rich liquid outlet of the desulfurization system, an outlet of the circulating pump is connected with a desulfurization liquid inlet of an ejector, the ejector is inserted into the lower part of the regeneration tank, a sulfur foam outlet of the regeneration tank is sent to the sulfur foam treatment system, and a regeneration barren liquid outlet of the desulfurization liquid of the regeneration tank is sent to the desulfurization system; the recycling gas outlet of the regeneration tank is connected with the recycling gas inlet of the gas separator, the recycling gas outlet of the gas separator is connected with the gas inlet of the ejector, and the oxygen or oxygen-enriched gas inlet below the liquid level of the desulfurization liquid of the regeneration tank is connected with an external oxygen or oxygen-enriched gas source. The utility model adopts the liquid phase supplementary oxygen or oxygen-enriched gas and waste gas circulation method to replace the prior supplementary air regeneration method, thereby avoiding the problem of discharging a large amount of residual nitrogen and waste gas generated by supplementary air regeneration; meanwhile, the deflagration risk brought by the oxygen or oxygen-enriched gas supplemented by the circulating gas is avoided.
Description
Technical Field
The utility model relates to a coke oven gas (gas) wet oxidation method desulphurization unit field especially relates to a wet oxidation method desulfurization oxygen sprays regenerating unit.
Background
The coke oven gas (fuel gas) contains hydrogen sulfide, and sulfur dioxide generated after combustion pollutes the atmosphere, and is one of main products of PM2.5, so that the hydrogen sulfide in the gas (fuel gas) must be removed, and the wet oxidation method desulfurization method widely applied at present has high desulfurization efficiency (the content of the hydrogen sulfide in the desulfurized gas can be less than 20 mg/m)3) The method has the characteristics of low investment, stable and reliable operation, low cost and the like, but the regeneration uses oxygen in the air for oxidation regeneration, the oxygen content in the air is about 21 percent, most of the oxygen is nitrogen (78 percent), the utilization rate of the oxygen in the air for regeneration is very low, the utilization rate is usually 20 to 40 percent, a large amount of air is supplemented, and more than 85 percent of tail gas and waste gas mainly containing nitrogen (the exhaust gas amount of a conventional 150 ten thousand tons/year coking device is 6000m3And h), discharging, wherein the tail gas and the waste gas contain ammonia gas, hydrogen sulfide, hydrogen cyanide, VOC and other polluted environments.
The method for treating the tail gas waste gas generated by the desulfurization regeneration of the coke oven gas by the wet oxidation method is a secondary pollutant generated by a desulfurization system, the treatment of the tail gas waste gas is an important problem for improving the desulfurization method, the reduction or even no emission of the tail gas waste gas is a solution direction which is discussed by people, the supplement of the oxygen quantity generated by the oxidation regeneration of the desulfurization solution and the sulfur generated by the regeneration of the waste gas circulating stripping desulfurization solution is a way, and patent document 200910012335.4/200920015024.9 proposes that oxygen-enriched gas or oxygen is supplemented into the circulating gas, but because the circulating tail gas contains gases such as ammonia gas, hydrogen sulfide, hydrogen cyanide, VOC and the like and sulfur foam entrainment substances, the direct supplement of the oxygen or the oxygen-enriched gas into the circulating.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a defect to the tail gas waste gas problem that above-mentioned coking industry coke oven gas wet oxidation method desulfurization regeneration produced, provide a wet oxidation method desulfurization oxygen jet regeneration device, it uses liquid phase supplementary oxygen or oxygen-enriched gas + exhaust gas circulation mode to realize doctor solution oxidation regeneration oxygenating and suspension sulphur separation function, and realize that coke oven gas wet oxidation method desulfurization regeneration trace (for supplying below 2% of air at present) tail gas or no tail gas waste gas produce, the good potential safety hazard problem of oxygenating in supplying a large amount of tail gas waste gas secondary pollutant emissions of air regeneration and the circulating gas at present of having solved.
In order to achieve the above object, the utility model adopts the following technical scheme:
a wet oxidation desulfurization oxygen jet regeneration device comprises a regeneration tank, an ejector, a gas separator and a circulating pump; an inlet of the circulating pump is connected with a desulfurization circulating liquid rich liquid outlet of the desulfurization system through a pipeline, an outlet of the circulating pump is connected with a desulfurization liquid inlet at the top of the ejector through a pipeline, the ejector is arranged at the top of the regeneration tank, an outlet of the ejector is inserted into the lower part of the regeneration tank, a sulfur foam outlet at the upper part of the regeneration tank is sent to the sulfur foam treatment system through a pipeline, and a desulfurization liquid regeneration lean liquid outlet at the upper part of the regeneration tank is sent to the desulfurization system through a pipeline; the upper part of the regeneration tank is connected with a circulating gas inlet of a gas separator through a pipeline, the circulating gas outlet of the gas separator is connected with a gas inlet of an ejector through a pipeline, a tail gas and waste gas outlet of the gas separator is discharged through a pipeline, and an oxygen or oxygen-enriched gas inlet under the liquid level of the desulfurization liquid of the regeneration tank is connected with an external oxygen or oxygen-enriched gas source through a pipeline.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model adopts the liquid phase supplementary oxygen or oxygen-enriched gas and waste gas circulation method to replace the prior supplementary air regeneration process method, thereby avoiding the problem of discharging a large amount of residual nitrogen and waste gas generated by supplementary air regeneration; meanwhile, the supplemented oxygen or oxygen-enriched gas is in the liquid phase of the desulfurization liquid of the regeneration tank, so that the deflagration safety risk caused by the supplement of the oxygen or oxygen-enriched gas by the circulating gas is avoided.
Drawings
Fig. 1 is a process flow diagram of the present invention.
FIG. 2 is a process flow diagram of example 1.
In the figure: 1-a regeneration tank, 1-1 a doctor solution regeneration barren solution outlet, 1-2 a sulfur foam outlet, 1-3 a circulating gas outlet, 1-4 an oxygen or oxygen-enriched gas inlet, 2-an ejector, 2-1 a doctor solution inlet, 2-2 an ejector gas inlet, 2-3 an ejector outlet, 3-a gas separator, 3-1 a tail gas and waste gas outlet, 3-2 a circulating gas inlet, 3-3 a gas separator circulating gas outlet, 4-a circulating pump, 5-a sulfur foam liquid level, 6-a doctor solution liquid level and 7-a desulfurizing tower.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings:
as shown in fig. 1, a wet oxidation desulfurization oxygen jet regeneration process device comprises a regeneration tank 1, an injector 2, a gas separator 3 and a circulating pump 4; an inlet of the circulating pump 4 is connected with a desulfurization circulating liquid rich liquid outlet of the desulfurization system through a pipeline, an outlet of the circulating pump 4 is connected with a desulfurization liquid inlet 2-1 at the top of the ejector 2 through a pipeline, the ejector 2 is arranged at the top of the regeneration tank 1, an outlet 2-3 of the ejector is inserted into the lower part of the regeneration tank 1, a sulfur foam outlet 1-2 at the upper part of the regeneration tank 1 is fed to the sulfur foam treatment system through a pipeline, and a desulfurization liquid regeneration lean liquid outlet 1-1 at the upper part of the regeneration tank 1 is fed to the desulfurization system through a pipeline; and a circulating gas outlet 1-3 at the upper part of the regeneration tank 1 is connected with a circulating gas inlet 3-2 of the gas separator 3 through a pipeline, a circulating gas outlet 3-3 of the gas separator is connected with a gas inlet 2-2 of the ejector through a pipeline, and a tail gas and waste gas outlet 3-1 of the gas separator 3 is discharged through a pipeline.
Oxygen or oxygen-enriched gas inlets 1-4 below the desulfurizing liquid level 6 of the regeneration tank 1 are connected with an external oxygen or oxygen-enriched gas source through pipelines. Oxygen or oxygen-enriched gas is supplemented into the desulfurization solution below the liquid level 6 of the desulfurization solution in the regeneration tank 1, so that the deflagration safety risk caused by the supplement of the oxygen or oxygen-enriched gas by the circulating gas is avoided.
A wet oxidation desulfurization oxygen jet regeneration process specifically comprises the following steps:
1) the method comprises the following steps that a desulfurization solution rich solution from a coal gas desulfurization system is pressurized by a circulating pump 4 and sent into an ejector 2, the desulfurization solution flowing in the ejector 2 through high-speed injection sucks gas containing oxygen from a gas separator 3 to be mixed, the gas-liquid mixture enters the bottom of a regeneration tank 1 from the lower part of the ejector 2, suspended sulfur in the desulfurization solution rises in the regeneration tank 1 to form sulfur foam, the upper sulfur foam is sent to a sulfur foam treatment system, and a desulfurization solution regeneration lean solution is sent to a desulfurization tower of the desulfurization system to be desulfurized below the sulfur foam;
2) oxygen or oxygen-enriched gas sent from the outside enters the desulfurization liquid below the liquid level 6 of the desulfurization liquid in the regeneration tank 1, the oxygen or the oxygen-enriched gas is mixed with the gas for stripping sulfur foam from the lower part of the ejector 2 in the liquid in the regeneration tank 1 and floats to the upper space of the regeneration tank, the circulating gas supplemented with the oxygen is sent out from the upper part of the regeneration tank 1 and sent into the ejector 2 through the gas separator 3 to be mixed with the desulfurization liquid at a high speed for oxidation and regeneration, and the gas separator 3 can discharge trace impurity gas brought by the continuous supplement of the oxygen or the oxygen-enriched gas.
The oxygen content of the supplementary oxygen or oxygen-enriched gas is 21-100% vol.
The oxygen content of the mixed gas at the top of the regeneration tank 1 is controlled to be 10-40% vol by oxygen supplement or oxygen-enriched gas.
An embodiment 1:
as shown in figure 2, the oxygen jet regeneration process and device for wet oxidation desulfurization and the lower desulfurization tower comprise a regeneration tank 1, an ejector 2, a gas separator 3, a circulating pump 4 and a desulfurization tower 7, wherein the regeneration tank 1 comprises a desulfurization solution regeneration barren solution outlet 1-1, a sulfur foam outlet 1-2, a circulating gas outlet 1-3 and an oxygen or oxygen-rich gas inlet 1-4, the ejector 2 comprises a desulfurization solution inlet 2-1, an ejector gas inlet 2-2 and an ejector outlet 2-3, the gas separator 3 comprises a tail gas waste gas outlet 3-1, a circulating gas inlet 3-2 and a gas separator circulating gas outlet 3-3; an inlet of the circulating pump 4 is connected with a desulfurization rich liquid outlet at the bottom of the desulfurization tower 7 through a pipeline, an outlet of the circulating pump 4 is connected with a desulfurization liquid inlet 2-1 at the top of the ejector 2 through a pipeline, the ejector 2 is arranged at the top of the regeneration tank 1, an outlet 2-3 of the ejector is inserted into the lower part of the regeneration tank 1, a sulfur foam outlet 1-2 at the upper part of the regeneration tank 1 is fed into a sulfur foam system through a pipeline, and a desulfurization liquid regeneration lean liquid outlet 1-1 at the upper part of the regeneration tank 1 is connected with a desulfurization regeneration lean liquid inlet at the upper part of the desulfurization; a circulating gas outlet 1-3 at the upper part of the regeneration tank 1 is connected with a circulating gas inlet 3-2 of a gas separator 3 through a pipeline, and a circulating gas outlet 3-3 of the gas separator is connected with a gas inlet 2-2 of an ejector 2 through a pipeline;
a tail gas and waste gas outlet 3-1 of the gas separator 3 is discharged through a pipeline;
oxygen or oxygen-enriched gas inlets 1-4 below the desulfurizing liquid level 6 of the regeneration tank 1 are connected with an external oxygen or oxygen-enriched gas source through pipelines.
The process flow is as follows:
1) coal gas (hydrogen sulfide content is 6-8 g/m) from the blast condensing unit3) The gas-liquid contact of the desulfurization regeneration barren solution entering the upper part of the desulfurizing tower 7 absorbs the hydrogen sulfide in the gas, and the desulfurized gas flows from the upper part of the desulfurizing tower 7 (the content of the hydrogen sulfide is 20 mg-200 mg/m)3) The outlet is sent out;
2) the desulfurization rich solution from the bottom of the desulfurization tower 7 is pressurized and sent into an ejector 2 through a circulating pump 4, the desulfurization solution which flows in the ejector 2 through high-speed ejection sucks the gas with specific oxygen content from a gas separator 3 to be mixed for oxidation regeneration of the desulfurization solution, a gas-liquid mixture flows out from the lower part of the ejector 2 and enters the bottom of a regeneration tank 1, suspended sulfur in the desulfurization solution is lifted and stripped in the regeneration tank to form sulfur foam, an upper sulfur foam outlet 1-2 is sent to a sulfur foam treatment system, and a desulfurization regeneration lean solution outlet 1-1 is sent to an upper desulfurization regeneration lean solution inlet of the desulfurization tower below the sulfur foam;
3) oxygen or oxygen-enriched gas sent from the outside enters the desulfurization liquid below the liquid level 6 of the desulfurization liquid in the regeneration tank 1 through an inlet 1-4, the oxygen or the oxygen-enriched gas is mixed with the gas for stripping sulfur foam from the lower part 2-3 of the ejector 2 in the liquid in the regeneration tank 1 and floats to the upper space of the regeneration tank 1, the circulating gas with specific oxygen content supplemented with the oxygen is sent out from an outlet 1-3 at the upper part of the regeneration tank 1 and sent into an air inlet 2-2 of the ejector 2 through an outlet 3-3 of the circulating gas of the gas separator 3 to be mixed with the desulfurization liquid at high speed for oxidation and regeneration,
4) the tail gas and waste gas outlet 3-1 of the gas separator 3 can remove a trace amount of impurity gas brought by continuously supplementing oxygen or oxygen-enriched gas.
5) The initial regeneration tank 1 for desulfurization regeneration, the ejector 2, the gas separator 2 and the pipeline are naturally filled with air to start operation, and oxygen or oxygen-enriched gas is fed from the inlet 1-4 of the regeneration tank 1 to supplement according to the oxygen consumption consumed by desulfurization liquid oxidation regeneration in the operation state.
6) The oxygen content of the mixed gas at the top of the regeneration tank 1 is controlled to be 20-22% vol by oxygen supplement.
Although the above description has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and on the basis of the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative efforts are still within the scope of the present invention.
Claims (1)
1. A wet oxidation desulfurization oxygen jet regeneration device comprises a regeneration tank, an ejector, a gas separator and a circulating pump; an inlet of the circulating pump is connected with a desulfurization circulating liquid rich liquid outlet of the desulfurization system through a pipeline, an outlet of the circulating pump is connected with a desulfurization liquid inlet at the top of the ejector through a pipeline, the ejector is arranged at the top of the regeneration tank, an outlet of the ejector is inserted into the lower part of the regeneration tank, a sulfur foam outlet at the upper part of the regeneration tank is sent to the sulfur foam treatment system through a pipeline, and a desulfurization liquid regeneration lean liquid outlet at the upper part of the regeneration tank is sent to the desulfurization system through a pipeline; the device is characterized in that a circulating gas outlet at the upper part of the regeneration tank is connected with a circulating gas inlet of a gas separator through a pipeline, a circulating gas outlet of the gas separator is connected with a gas inlet of an ejector through a pipeline, a tail gas and waste gas outlet of the gas separator is discharged through a pipeline, and an oxygen or oxygen-enriched gas inlet below the liquid level of the desulfurization liquid of the regeneration tank is connected with an external oxygen or oxygen-enriched gas source through a pipeline.
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| CN201920662607.4U CN210127224U (en) | 2019-05-09 | 2019-05-09 | Wet oxidation method desulfurization oxygen sprays regenerating unit |
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| CN201920662607.4U CN210127224U (en) | 2019-05-09 | 2019-05-09 | Wet oxidation method desulfurization oxygen sprays regenerating unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110028991A (en) * | 2019-05-09 | 2019-07-19 | 宁波科新化工工程技术有限公司 | A kind of wet oxidation desulfurization oxygen spray regeneration technology and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110028991A (en) * | 2019-05-09 | 2019-07-19 | 宁波科新化工工程技术有限公司 | A kind of wet oxidation desulfurization oxygen spray regeneration technology and device |
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