CN202751934U - Sulfur tail gas absorption purification combination device with circulated absorbents - Google Patents
Sulfur tail gas absorption purification combination device with circulated absorbents Download PDFInfo
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- CN202751934U CN202751934U CN 201220391534 CN201220391534U CN202751934U CN 202751934 U CN202751934 U CN 202751934U CN 201220391534 CN201220391534 CN 201220391534 CN 201220391534 U CN201220391534 U CN 201220391534U CN 202751934 U CN202751934 U CN 202751934U
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Abstract
The utility model relates to a sulfur tail gas absorption purification combination device with circulated absorbents, and the selective absorbents are adopted to carry out selective absorption to sulfur tail gas and purify the sulfur tail gas. The sulfur tail gas absorption purification combination device is formed by an absorption tower, an enriched absorbent pump, an enriched absorbent- regenerative absorbent heat exchanger, a regeneration tower, a regeneration tower reboiler, a regenerative absorbent pump, a regenerative absorbent cooler, a regenerative tower top circulation pump, a regenerative tower top circulation air cooler, a regenerative tower top circulation water cooler, a regenerative tower top pressure control valve and a pipeline. Compared with the prior art, the sulfur tail gas absorption purification combination device has the advantages of being small in absorption energy consumption and regenerative energy consumption, high in hydrogen sulfide removal rate, improving efficiency of regenerative tower condensing cooling equipment, and simplifying a regenerative tower control system and the like.
Description
Technical field
The utility model relates to a kind of gas cleaning plant, especially relates to a kind of tail gas of sulphur absorption cleaning composite set of absorbent circulation.
Background technology
For satisfying country's " discharge standard of air pollutants " requirement (GB16297-1996), the sulphur recovery workshop need to recycle various sulfide and the elemental sulfur in the sulfur recovery tail gas.Industrial widely used method is reduction-absorption process at present, be about to sulfur recovery tail gas and pass through hydrogenation reactor, under the hydrogenation catalyst effect, make sulphur and sulfide in the tail gas be transformed into hydrogen sulfide, then enter the tail gas of sulphur absorption tower, with the hydrogen sulfide selectively removing in the tail gas, total sulfur discharges after burning less than 200～300ppm in the tail gas after the desulfurization.
Wherein, common tail gas of sulphur absorbs main flow process and is:
Tail gas of sulphur contacts in the absorption tower with selective absorber, and hydrogen sulfide and partial CO 2 in the tail gas are transferred in the selective absorber.Tail gas leaves from the top, absorption tower after the desulfurization, emptying after burning.Be rich in the selective absorber of hydrogen sulfide from the bottom, absorption tower out, after heating, enter regenerator top.Temperature in the regenerator is higher, and hydrogen sulfide, carbon dioxide are separated from selective absorber, upwards after the cooling of regeneration overhead cooling device, separates with condensate liquid in return tank.Hydrogen sulfide, the carbon dioxide separated in the return tank return sulfur recovery facility, and condensate liquid returns regeneration overhead as cold reflux; Selective absorber after the regeneration from the regenerator bottom out enters top, absorption tower after cooling, recycle.
There are two stages in the absorption of hydrogen sulfide in the tail gas of sulphur.When absorption process begins, in the tail gas of sulphur concentration of hydrogen sulfide far above with the concentration of selective absorber balance, the assimilation effect of hydrogen sulfide depends primarily on the mass transfer effect between gas-liquid two-phase, and this one-phase is referred to as the mass transfer absorber portion, and a large amount of hydrogen sulfide is absorbed in this section.Terminal in absorption process, the concentration of hydrogen sulfide is lower in the tail gas of sulphur, reaches and the state of selective absorber near balance, at this moment the assimilation effect of hydrogen sulfide. and depend on the content of hydrogen sulfide in the selective absorber, this one-phase is called the Balance Absorption section.
In the tail gas of sulphur absorption plant, top, absorption tower is the Balance Absorption section, and is up to standard for hydrogen sulfide content in the tail gas that guarantees to leave the absorption tower, requires the content of hydrogen sulfide in the selective absorber very low, the effect of guarantee Balance Absorption.The bottom, absorption tower is the mass transfer absorber portion, and the content of hydrogen sulfide can be slightly high in the selective absorber, and the regeneration depth requirements is lower.On the other hand, remaining hydrogen sulfide total amount is less in the Balance Absorption section tail gas of sulphur of absorption tower, and the amount of the selective absorber of needed with it balance is also few.And in order to obtain preferably mass transfer assimilation effect, the selective absorber flow that absorption tower mass transfer absorber portion is then had relatively high expectations.So the requirement of absorption tower Balance Absorption section selective absorber is that flow is little, hydrogen sulfide content is low, and the regeneration degree of depth is high; The requirement of absorption tower mass transfer absorber portion selective absorber is that flow is large, and hydrogen sulfide content does not need very low, and the regeneration depth requirements is lower.
Conventional tail gas of sulphur absorption plant, selective absorber all enters the absorption tower from top, and the selective absorber full dose that is rich in hydrogen sulfide enters regenerator, and the lean solvent after the regeneration again full dose loops back the absorption cat head.There is following shortcoming in this technique:
1) energy consumption is high.
Absorb the height of tower top outlet tail gas total sulfur content, decisive factor is the concentration (the regeneration degree of depth of selective absorber) that enters hydrogen sulfide in the cat head selective absorber, but not enters the selective absorber flow on absorption tower.The selective absorber full dose enters from the absorption tower jacking, and for reaching total sulfur content requirement in the tail gas, hydrogen sulfide content is less than Balance Absorption concentration (degree of depth of namely regenerating) in the section's absorbent of will demanding perfection.In addition, the rich hydrogen sulfide selective absorbent that leaves the absorption tower still has more absorbability to utilize, and causes system's total solvent internal circulating load large, and the regenerator load is high, steam consumption is large.
2) regeneration overhead condensing cooling device efficiency is low
In the conventional tail gas of sulphur absorption plant, hydrogen sulfide, carbon dioxide and water vapour enter condensate cooler from regeneration overhead, and condensate liquid refluxes and returns tower, hydrogen sulfide, carbon dioxide discharger.So there is the gas-liquid two-phase condensing cooling in flow process, and heat transfer efficiency is low, needs the cooling device area large, and energy consumption and investment are higher.
3) regeneration overhead condenser system flow process is complicated
Need to arrange return tank behind the regeneration overhead gas condensing cooling and carry out gas-liquid separation, need the control capacity of returns to guarantee the stable of return tank liquid level, need control hydrogen sulfide, carbon dioxide discharger amount to guarantee the stable of tower top pressure, not only flow process is complicated and cause easily the tower top temperature fluctuation.
The utility model content
The purpose of this utility model is exactly to provide a kind of absorption, regeneration energy consumption little in order to overcome the defective that above-mentioned prior art exists, the hydrogen sulfide stripping rate is high, improves the tail gas of sulphur absorption cleaning composite set of the absorbent circulation of regenerator condensing cooling device efficiency and simplification regenerator control system.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of tail gas of sulphur absorption cleaning composite set of absorbent circulation, utilize selective absorber that tail gas of sulphur is selectively absorbed, purify tail gas of sulphur, this device is comprised of absorption tower, rich absorbent pump, rich absorbent-absorbent regeneration heat exchanger, regenerator, regenerator reboiler, absorbent regeneration pump, absorbent regeneration cooler, regeneration overhead circulating pump, regeneration overhead circulating air cooling device, regeneration overhead recirculated water cooler, regeneration overhead pressure-control valve and pipeline;
Connect successively on the connecting line between described absorption tower and the regenerator absorbent regeneration cooler, rich absorbent-absorbent regeneration heat exchanger, absorbent regeneration pump;
Described rich absorbent pump is connected on the absorption tower through pipeline;
Described regeneration overhead circulating pump, regeneration overhead circulating air cooling device, regeneration overhead recirculated water cooler are connected to the regenerator top in turn through pipeline.
Top, described absorption tower is provided with the tail gas outlet, and top is provided with the absorbent regeneration entrance, and the middle part is provided with circulation rich absorbent entrance, and the bottom is provided with the tail gas of sulphur entrance, and the bottom is provided with the rich absorbent outlet.
Described circulation rich absorbent entrance is provided with one or more.
Described regenerator is with the regenerator reboiler, and the top is provided with gas vent, links to each other with the regeneration overhead pressure-control valve, and top is provided with rich absorbent entrance, the outlet of top circulation fluid and top circulation fluid entrance, and the bottom is provided with the absorbent regeneration outlet.
The rich absorbent outlet of bottom, described absorption tower connects the rich absorbent pump intake, the rich absorbent pump discharge is divided into two-way, one the tunnel returns absorption tower middle part circulation rich absorbent entrance, another road connects rich absorbent-absorbent regeneration heat exchanger cold flow entrance, and rich absorbent-absorbent regeneration heat exchanger cold flow outlet connects regenerator top rich absorbent entrance.
Described absorbent pump discharge is divided into two-way or multichannel.
The absorbent regeneration outlet of described regenerator bottom connects the absorbent regeneration pump intake, the absorbent regeneration pump discharge connects rich absorbent-absorbent regeneration exchanger heat inflow entrance, rich absorbent-absorbent regeneration exchanger heat flow export connects absorbent regeneration cooler entrance, and the absorbent regeneration cooler outlet connects top, absorption tower absorbent regeneration entrance.
The top circulation fluid outlet on described regenerator top connects the regeneration overhead pump entry, the regeneration overhead circulating-pump outlet connects regeneration overhead circulating air cooling device entrance, the outlet of regeneration overhead circulating air cooling device connects regeneration overhead recirculated water cooler entrance, and the outlet of regeneration overhead recirculated water cooler connects top, regenerator top circulation fluid entrance.
Compared with prior art, the different absorption processes of the utility model are introduced the selective absorber of different regeneration levels, and regenerator refluxes and adopts the top circulating reflux, has the following advantages:
1) energy consumption is low.
The utility model still has the absorption tower bottom outlet absorbent of selecting absorbability to a part and returns the middle part, absorption tower, takes full advantage of the selective absorbability of absorbent.The flow of absorbent in increasing the absorption tower when guaranteeing the mass transfer absorption efficiency, has reduced the flow of absorbent regeneration circulation, has reduced load and the energy consumption of regenerator.
2) hydrogen sulfide stripping rate is high
The utility model absorbent circular regeneration amount is little, and the regeneration degree of depth more easily improves, easily control, thus improved the absorption efficiency of Balance Absorption process, the desulfuration efficiency height.
3) regeneration overhead condensing cooling device efficiency is high
The utility model regenerator refluxes and adopts the top circulating reflux, and circulation fluid is extracted out from regenerator top, and full liquid phase circulation refluxes, and heat transfer efficiency is high, needs the cooling device area little, and energy consumption and investment are lower.
4) the regeneration overhead flow process is simple
The utility model has been cancelled return tank, under the effect of top circulating reflux, regeneration overhead fluid out is simple hydrogen sulfide, carbon dioxide gas phase, temperature is low, do not contain the coagulability medium, no longer carry out condensing cooling, the control valve that the pressure of regenerator can pass through on hydrogen sulfide, the carbon dioxide pipeline is regulated, and is simple.Flow process is simple, control is stable flexibly.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure, 1 is that absorption tower, 2 is that rich absorbent pump, 3 is that rich absorbent-absorbent regeneration heat exchanger, 4 is that regenerator, 5 is that regenerator reboiler, 6 is that absorbent regeneration pump, 7 is that absorbent regeneration cooler, 8 is that regeneration overhead circulating pump, 9 is that regeneration overhead circulating air cooling device, 10 is that regeneration overhead recirculated water cooler, 11 is the regeneration overhead pressure-control valve.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Embodiment
A kind of tail gas of sulphur absorption cleaning composite set of absorbent circulation, utilize selective absorber that tail gas of sulphur is selectively absorbed, purify tail gas of sulphur, its structure as shown in Figure 1, this device is comprised of absorption tower 1, rich absorbent pump 2, rich absorbent-absorbent regeneration heat exchanger 3, regenerator 4, regenerator reboiler 5, absorbent regeneration pump 6, absorbent regeneration cooler 7, regeneration overhead circulating pump 8, regeneration overhead circulating air cooling device 9, regeneration overhead recirculated water cooler 10, regeneration overhead pressure-control valve 11 and pipeline.Wherein, connect successively on the connecting line between absorption tower 1 and the regenerator 4 absorbent regeneration cooler 7, rich absorbent-absorbent regeneration heat exchanger 3, absorbent regeneration pump 6.Rich absorbent pump 2 is connected on the absorption tower 1 through pipeline.Regeneration overhead circulating pump 8, regeneration overhead circulating air cooling device 9, regeneration overhead recirculated water cooler 10 are connected to regenerator 4 tops in turn through pipeline, specifically, the top circulation fluid outlet on the top of regenerator 4 connects the entrance of regeneration overhead circulating pump 8, the outlet of regeneration overhead circulating pump 8 connects the entrance of regeneration overhead circulating air cooling device 9, the outlet of regeneration overhead circulating air cooling device 9 connects the entrance of regeneration overhead recirculated water cooler 10, and the outlet of regeneration overhead recirculated water cooler 10 connects top, regenerator top circulation fluid entrance.
Be provided with the tail gas outlet at the top, absorption tower, purified gas is discharged absorption tower 1 through the tail gas outlet, 1 top is provided with the absorbent regeneration entrance on the absorption tower, the middle part is provided with one or more circulation rich absorbent entrances, the bottom is provided with the tail gas of sulphur entrance, tail gas of sulphur enters absorption tower 1 from the tail gas of sulphur entrance, and the bottom on absorption tower 1 is provided with the rich absorbent outlet.
The rich absorbent outlet of 1 bottom, absorption tower connects the entrance of rich absorbent pump 2, the outlet of rich absorbent pump 2 is divided into two-way, one the tunnel returns absorption tower middle part circulation rich absorbent entrance, another road connects the cold flow entrance of rich absorbent-absorbent regeneration heat exchanger 3, and the cold flow outlet of rich absorbent-absorbent regeneration heat exchanger 3 connects regenerator top rich absorbent entrance.
The absorbent regeneration outlet of the bottom of regenerator 4 connects the entrance of absorbent regeneration pump 6, the outlet of absorbent regeneration pump 6 connects the hot-fluid entrance of rich absorbent-absorbent regeneration heat exchanger 3, the hot-fluid outlet of rich absorbent-absorbent regeneration heat exchanger 3 connects the entrance of absorbent regeneration cooler 7, and the outlet of absorbent regeneration cooler 7 connects absorption tower 1 top absorbent regeneration entrance.
Claims (8)
1. the tail gas of sulphur absorption cleaning composite set of absorbent circulation, utilize selective absorber that tail gas of sulphur is selectively absorbed, purify tail gas of sulphur, it is characterized in that this device is comprised of absorption tower, rich absorbent pump, rich absorbent-absorbent regeneration heat exchanger, regenerator, regenerator reboiler, absorbent regeneration pump, absorbent regeneration cooler, regeneration overhead circulating pump, regeneration overhead circulating air cooling device, regeneration overhead recirculated water cooler, regeneration overhead pressure-control valve and pipeline;
Connect successively on the connecting line between described absorption tower and the regenerator absorbent regeneration cooler, rich absorbent-absorbent regeneration heat exchanger, absorbent regeneration pump;
Described rich absorbent pump is connected on the absorption tower through pipeline;
Described regeneration overhead circulating pump, regeneration overhead circulating air cooling device, regeneration overhead recirculated water cooler are connected to the regenerator top in turn through pipeline.
2. the tail gas of sulphur absorption cleaning composite set of a kind of absorbent circulation according to claim 1, it is characterized in that, top, described absorption tower is provided with the tail gas outlet, top is provided with the absorbent regeneration entrance, the middle part is provided with circulation rich absorbent entrance, the bottom is provided with the tail gas of sulphur entrance, and the bottom is provided with the rich absorbent outlet.
3. the tail gas of sulphur absorption cleaning composite set of a kind of absorbent circulation according to claim 2 is characterized in that described circulation rich absorbent entrance is provided with one or more.
4. the tail gas of sulphur absorption cleaning composite set of a kind of absorbent circulation according to claim 1, it is characterized in that, described regenerator is with the regenerator reboiler, the top is provided with gas vent, link to each other with the regeneration overhead pressure-control valve, top is provided with rich absorbent entrance, the outlet of top circulation fluid and top circulation fluid entrance, and the bottom is provided with the absorbent regeneration outlet.
5. the tail gas of sulphur absorption cleaning composite set of a kind of absorbent circulation according to claim 1, it is characterized in that, the rich absorbent outlet of bottom, described absorption tower connects the rich absorbent pump intake, the rich absorbent pump discharge is divided into two-way, one the tunnel returns absorption tower middle part circulation rich absorbent entrance, another road connects rich absorbent-absorbent regeneration heat exchanger cold flow entrance, and rich absorbent-absorbent regeneration heat exchanger cold flow outlet connects regenerator top rich absorbent entrance.
6. the tail gas of sulphur absorption cleaning composite set of a kind of absorbent circulation according to claim 5 is characterized in that described absorbent pump discharge is divided into two-way or multichannel.
7. the tail gas of sulphur absorption cleaning composite set of a kind of absorbent circulation according to claim 1, it is characterized in that, the absorbent regeneration outlet of described regenerator bottom connects the absorbent regeneration pump intake, the absorbent regeneration pump discharge connects rich absorbent-absorbent regeneration exchanger heat inflow entrance, rich absorbent-absorbent regeneration exchanger heat flow export connects absorbent regeneration cooler entrance, and the absorbent regeneration cooler outlet connects top, absorption tower absorbent regeneration entrance.
8. the tail gas of sulphur absorption cleaning composite set of a kind of absorbent circulation according to claim 1, it is characterized in that, the top circulation fluid outlet on described regenerator top connects the regeneration overhead pump entry, the regeneration overhead circulating-pump outlet connects regeneration overhead circulating air cooling device entrance, the outlet of regeneration overhead circulating air cooling device connects regeneration overhead recirculated water cooler entrance, and the outlet of regeneration overhead recirculated water cooler connects top, regenerator top circulation fluid entrance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220391534 CN202751934U (en) | 2012-08-08 | 2012-08-08 | Sulfur tail gas absorption purification combination device with circulated absorbents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220391534 CN202751934U (en) | 2012-08-08 | 2012-08-08 | Sulfur tail gas absorption purification combination device with circulated absorbents |
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| Publication Number | Publication Date |
|---|---|
| CN202751934U true CN202751934U (en) | 2013-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220391534 Expired - Lifetime CN202751934U (en) | 2012-08-08 | 2012-08-08 | Sulfur tail gas absorption purification combination device with circulated absorbents |
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| CN (1) | CN202751934U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817130A (en) * | 2016-05-10 | 2016-08-03 | 四川西油致诚石油技术有限公司 | Device for efficient treatment of exhaust gas hydrogen sulfide |
| CN108641764A (en) * | 2018-06-15 | 2018-10-12 | 宁波章甫能源科技有限公司 | A kind of device and method of gas material removing organic sulfur |
| CN110624525A (en) * | 2018-06-21 | 2019-12-31 | 中国石化工程建设有限公司 | Active coke regeneration system and method |
-
2012
- 2012-08-08 CN CN 201220391534 patent/CN202751934U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817130A (en) * | 2016-05-10 | 2016-08-03 | 四川西油致诚石油技术有限公司 | Device for efficient treatment of exhaust gas hydrogen sulfide |
| CN108641764A (en) * | 2018-06-15 | 2018-10-12 | 宁波章甫能源科技有限公司 | A kind of device and method of gas material removing organic sulfur |
| CN110624525A (en) * | 2018-06-21 | 2019-12-31 | 中国石化工程建设有限公司 | Active coke regeneration system and method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130227 |