CN104524970B - A kind of selexol process exhaust gas purification system taking low-quality waste heat source as power - Google Patents
A kind of selexol process exhaust gas purification system taking low-quality waste heat source as power Download PDFInfo
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- CN104524970B CN104524970B CN201510010700.3A CN201510010700A CN104524970B CN 104524970 B CN104524970 B CN 104524970B CN 201510010700 A CN201510010700 A CN 201510010700A CN 104524970 B CN104524970 B CN 104524970B
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- Prior art keywords
- waste heat
- gas
- heat source
- cooler
- tail
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- 239000007789 gas Substances 0.000 title claims abstract description 79
- 239000002918 waste heat Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008569 process Effects 0.000 title claims abstract description 20
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 238000000746 purification Methods 0.000 title claims abstract description 12
- 238000010521 absorption reaction Methods 0.000 claims abstract description 44
- 238000002485 combustion reaction Methods 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 238000005984 hydrogenation reaction Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000002826 coolant Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 4
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 claims description 4
- 239000000446 fuel Substances 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of selexol process exhaust gas purification system taking low-quality waste heat source as power, it comprises the hydrogenation combustion furnace (1) connecting successively by pipeline, Hydrogenated reaction furnace (2), absorption tower (3), tail-gas combustion stove (4) and waste heat boiler (5), between the port of export on absorption tower (3) and tail-gas combustion stove (4), be connected with Air cooler (6) in turn by pipeline, cooler (7) and gas preheater (8), deep freezer (9) connects absorption refrigerating machine (10), absorption refrigerating machine (10) freezes as driving heat source using waste heat or low-pressure steam, on gas preheater (8), be provided with the jet chimney (11) and the outlet pipe (12) that are communicated with gas preheater (8). the invention has the beneficial effects as follows: promoted significantly the temperature of the gas that enters tail-gas combustion stove, reduced the consumption of the fuel of tail-gas combustion stove, the utilization rate that has improved waste heat, has reduced energy consumption.
Description
Technical field
The present invention relates to a kind of selexol process exhaust gas purification system taking low-quality waste heat source as power.
Background technology
In natural gas purification, petroleum refining, coking and coal gas generation equal energy source process, all can produce the H of high concentration2S gas, sulfur recovery facility is exactly to containing H2The sour gas of S is processed and Recovered sulphur, realizes cleaner production, becomes useless repair and maintenance, reduces and pollutes and protection of the environment.
Crouse (Claus) method recovery technology of sulfur has more than 100 year history, and the general Cross unit with two-stage or three grades of catalytic reactors that adopts is processed and Recovered sulphur. Owing to being subject to the restriction of chemical reaction equilibrium under reaction temperature, even good in the situation that, use active good catalyst and three grades of conversion process, the highest 96～97% left and right that also can only reach of the rate of recovery of Claus method sulphur, remaining H in equipment and operating condition2S, gaseous sulfur and sulfide enter into desulfidation tail gas.
In order to reduce desulfidation tail gas pollution on the environment, desulfidation tail gas treatment technology is greatly improved in recent years, Reducing and absorption method because it has that running is reliable, the feature such as flexible operation, operating flexibility be large, at equipment quantitatively, always in overwhelming dominance. But in Reducing and absorption method, desulfidation tail gas need to experience the process of heating, cooling, burning, and heat energy and fuel energy consumption are large, how in improving vent gas treatment effect, reduce energy consumption, become the technical barrier that improves desulfidation tail gas treatment process.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art, a kind of selexol process exhaust gas purification system taking low-quality waste heat source as power is provided.
Object of the present invention is achieved through the following technical solutions: a kind of selexol process exhaust gas purification system taking low-quality waste heat source as power, it comprises the hydrogenation combustion furnace connecting successively by pipeline, Hydrogenated reaction furnace, absorption tower, tail-gas combustion stove and waste heat boiler, between the port of export on described absorption tower and tail-gas combustion stove, be connected with Air cooler in turn by pipeline, cooler and gas preheater, described cooler also connects deep freezer, deep freezer connects absorption refrigerating machine, absorption refrigerating machine provides cold by deep freezer for cooler, absorption refrigerating machine freezes as driving heat source using waste heat or low-pressure steam, on gas preheater, be provided with the jet chimney and the outlet pipe that are communicated with gas preheater, provide heating energy through jet chimney for gas preheater by rich steam.
On described connection Hydrogenated reaction furnace and the pipeline on absorption tower, be provided with low pressure waste heat boiler.
The cooling medium entrance of described cooler connects the delivery port of water tower by another branch road, the cooling medium outlet of cooler connects the water inlet of water tower by another branch road.
The top on described absorption tower is provided with feed tube, and the bottom on absorption tower is provided with discharging tube, inputs methyldiethanolamine solution by feed tube in absorption tower.
The present invention has the following advantages: (1) the present invention utilizes rich steam to heat the gas in gas preheater, the temperature of the gas of eluting gas preheater is 150 DEG C, comparing the gas temperature that existing technique enters tail-gas combustion stove is 45～60 DEG C, promote significantly the temperature of the gas that enters tail-gas combustion stove, thereby reduced the consumption of the fuel of tail-gas combustion stove, by the consumption of fuel natural gas from 2100Nm3/ h has dropped to 1740Nm3/ h, provides cost savings equally. (2) the low pressure waste heat boiler in the present invention, waste heat boiler all can be used as absorption refrigerating machine driving heat source, also can adopt other low-quality waste heat source as absorption refrigerating machine driving heat source, thereby have improved the utilization rate of waste heat, have reduced energy consumption.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
In figure, 1-hydrogenation combustion furnace, 2-Hydrogenated reaction furnace, 3-absorption tower, 4-tail-gas combustion stove, 5-waste heat boiler, 6-Air cooler, 7-cooler, 8-gas preheater, 9-deep freezer, 10-absorption refrigerating machine, 11-jet chimney, 12-outlet pipe, 13-low pressure waste heat boiler, 14-water tower, 15-feed tube, 16-discharging tube.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described, and protection scope of the present invention is not limited to the following stated:
As shown in Figure 1, a kind of selexol process exhaust gas purification system taking low-quality waste heat source as power, it comprises the hydrogenation combustion furnace 1 connecting successively by pipeline, Hydrogenated reaction furnace 2, absorption tower 3, tail-gas combustion stove 4 and waste heat boiler 5, between the port of export on described absorption tower 3 and tail-gas combustion stove 4, be connected with Air cooler 6 in turn by pipeline, cooler 7 and gas preheater 8, described cooler 7 also connects deep freezer 9, deep freezer 9 connects absorption refrigerating machine 10, particularly, the cooling medium entrance of cooler 7 connects the delivery port of deep freezer 9, the cooling medium outlet of cooler 7 connects the water inlet of deep freezer 9, the cooling medium entrance of deep freezer 9 connects the outlet of absorption refrigerating machine 10, the cooling medium outlet of deep freezer 9 connects the entrance of absorption refrigerating machine 10. absorption refrigerating machine 10 provides cold by deep freezer 9 for cooler 7, absorption refrigerating machine 10 freezes as driving heat source using waste heat or low-pressure steam, on gas preheater 8, be provided with and be communicated with jet chimney 11 and the outlet pipe 12 of gas preheater 8, provide heating energy through jet chimney 11 for gas preheater 8 by rich steam.
On described connection Hydrogenated reaction furnace 2 and the pipeline on absorption tower 3, be provided with low pressure waste heat boiler 13.
The cooling medium entrance of described cooler 7 connects the delivery port of water tower 14 by another branch road, the cooling medium outlet of cooler 7 connects the water inlet of water tower 14 by another branch road.
The top on described absorption tower 3 is provided with feed tube 15, and the bottom on absorption tower 3 is provided with discharging tube 16, by feed tube 15 to absorption tower 3 interior input methyldiethanolamine solution.
Job step of the present invention is as follows: S1, selexol process tail gas enter from the charging aperture of hydrogenation combustion furnace 1, by hydrogenation combustion furnace 1, selexol process tail gas is heated, selexol process tail gas after heating enters Hydrogenated reaction furnace 2, issue raw reduction reaction at the interior selexol process tail gas of Hydrogenated reaction furnace 2 and the hydrogen passing in Hydrogenated reaction furnace 2 in the effect of catalyst, the sulfide in selexol process tail gas and elementary sulfur are all reduced to H2S；
The H being reduced in S2, step S12S enters in absorption tower 3, and the methyldiethanolamine solution in absorption tower 3 absorbs the H in gas2S；
S3, flow through successively Air cooler 6 and cooler 7 to complete cooling from 3 tops, absorption tower gas out, realized gas dewatering simultaneously, the gas of subsequent drying enters in gas preheater 8;
S4, in gas preheater 8, pass into rich steam through jet chimney 11, rich steam heats dry gas, therefore take full advantage of rich steam, the temperature of the gas of eluting gas preheater 8 is 150 DEG C, comparing the gas temperature that existing technique enters tail-gas combustion stove is 45～60 DEG C, promote significantly the temperature of the gas that enters tail-gas combustion stove, thereby reduced the consumption of the fuel of tail-gas combustion stove, reduced cost. After heating, enter tail-gas combustion stove 4 and burn, the smoke gas flow that burning forms heats the water in waste heat boiler 5 through waste heat boiler 5, enters afterwards atmosphere. Low pressure waste heat boiler 13, the interior heated hot water of waste heat boiler 5 can be used as again absorption refrigerating machine 10 driving heat source
In described step S2, from Hydrogenated reaction furnace 2 H out2S gas enters before absorption tower 3, also comprises that one from Hydrogenated reaction furnace 2 H out2S gas flow is through the step of low pressure waste heat boiler 5, from Hydrogenated reaction furnace 2 H out2S gas heats the water in low pressure waste heat boiler 5.
Described step S2 also comprises that water in water tower 14 flows into cooler 7, returns to again the step of water tower 14 in cooler 7 after completing heat exchange.
Claims (4)
1. the selexol process exhaust gas purification system taking low-quality waste heat source as power, it is characterized in that: it comprises the hydrogenation combustion furnace (1) connecting successively by pipeline, Hydrogenated reaction furnace (2), absorption tower (3), tail-gas combustion stove (4) and waste heat boiler (5), between the port of export on described absorption tower (3) and tail-gas combustion stove (4), be connected with Air cooler (6) in turn by pipeline, cooler (7) and gas preheater (8), described cooler (7) also connects deep freezer (9), deep freezer (9) connects absorption refrigerating machine (10), absorption refrigerating machine (10) provides cold by deep freezer (9) for cooler (7), absorption refrigerating machine (10) freezes as driving heat source using waste heat or low-pressure steam, on gas preheater (8), be provided with the jet chimney (11) and the outlet pipe (12) that are communicated with gas preheater (8), provide heating energy through jet chimney (11) for gas preheater (8) by rich steam.
2. a kind of selexol process exhaust gas purification system taking low-quality waste heat source as power according to claim 1, is characterized in that: on described connection Hydrogenated reaction furnace (2) and the pipeline of absorption tower (3), be provided with low pressure waste heat boiler (13).
3. a kind of selexol process exhaust gas purification system taking low-quality waste heat source as power according to claim 1, it is characterized in that: the cooling medium entrance of described cooler (7) connects the delivery port of water tower (14) by another branch road, the cooling medium outlet of cooler (7) connects the water inlet of water tower (14) by another branch road.
4. a kind of selexol process exhaust gas purification system taking low-quality waste heat source as power according to claim 1, it is characterized in that: the top on described absorption tower (3) is provided with feed tube (15), the bottom on absorption tower (3) is provided with discharging tube (16), inputs methyldiethanolamine solution by feed tube (15) to absorption tower in (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510010700.3A CN104524970B (en) | 2015-01-09 | 2015-01-09 | A kind of selexol process exhaust gas purification system taking low-quality waste heat source as power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510010700.3A CN104524970B (en) | 2015-01-09 | 2015-01-09 | A kind of selexol process exhaust gas purification system taking low-quality waste heat source as power |
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| Publication Number | Publication Date |
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| CN104524970A CN104524970A (en) | 2015-04-22 |
| CN104524970B true CN104524970B (en) | 2016-05-18 |
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| CN201510010700.3A Expired - Fee Related CN104524970B (en) | 2015-01-09 | 2015-01-09 | A kind of selexol process exhaust gas purification system taking low-quality waste heat source as power |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679459A (en) * | 2016-11-17 | 2017-05-17 | 靖江市格利环保科技有限公司 | Double-effect steam heat exchanger |
| CN216171293U (en) * | 2021-09-28 | 2022-04-05 | 中国华能集团清洁能源技术研究院有限公司 | Low-temperature desulfurization and denitrification system for flue gas of coking plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100544807C (en) * | 2007-01-30 | 2009-09-30 | 四川四维工程设计有限公司 | A sulfur recovery and tail gas treatment device and method for sulfur recovery and tail gas treatment |
| CN103170223B (en) * | 2013-04-11 | 2015-10-21 | 上海华畅环保设备发展有限公司 | The eddy flow intensifying method of Clause method sulfur production tail gas clean-up and device |
| CN104235826B (en) * | 2013-06-13 | 2017-02-08 | 烟台龙源电力技术股份有限公司 | Boiler flue gas waste heat recycling system |
| CN204380511U (en) * | 2015-01-09 | 2015-06-10 | 成都中赢正源节能科技服务有限公司 | A kind of selexol process exhaust gas purification system that is power with low-quality waste heat source |
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