CN207998584U - A kind of system for strengthening deacidifion desorption - Google Patents
A kind of system for strengthening deacidifion desorption Download PDFInfo
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- CN207998584U CN207998584U CN201820261571.4U CN201820261571U CN207998584U CN 207998584 U CN207998584 U CN 207998584U CN 201820261571 U CN201820261571 U CN 201820261571U CN 207998584 U CN207998584 U CN 207998584U
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Abstract
The utility model is related to a kind of systems of reinforcing deacidifion desorption, deacidifion top of tower is equipped with gaseous mixture outlet and rich solution entrance, the middle part of deacidifion tower is equipped with lean solution side take-off mouth, remained ammonia entrance and alkali liquor inlet, deacidifion tower lower part sets heat source entrance, and deacidifion tower bottom sets distilled ammonia wastewater outlet;The gaseous mixture entrance of condenser or dephlegmator is connect with the gaseous mixture outlet of deacidifion tower;The first heat transferring medium outlet of the rich solution entrance connection heat exchanger of deacidifion tower, the first heat transferring medium entrance of heat exchanger connect rich solution conveyance conduit;The lean solution side take-off mouth of deacidifion tower is sequentially connected the second heat transferring medium entrance of lean pump and heat exchanger, the second heat transferring medium outlet connection lean solution conveyance conduit of heat exchanger.The utility model prevents excessive ammonia from being escaped from tower top with mixed gas by improving the desorption efficiency of hydrogen sulfide in rich solution, so as to improve desulfurization lean solution quality, and is finally reached the purpose for improving desulfuration efficiency.
Description
Technical field
The utility model is related to what coke oven gas purification technical field more particularly to a kind of reinforcing deacidifion desorbed to be
System.
Background technology
Coke-stove gas removing hydrogen sulfide is the important step of gas purification process, and ammonia spirit desulfurization technique is a kind of for taking off
Except the common technology of hydrogen sulfide in raw coke oven gas.Ammonia spirit desulfurization is using the ammonia in coal gas as alkali source, is washing with water containing ammonia
Medium combines the hydrogen sulfide in washing (absorption) technique removing coal gas using ammonia sulphur.The method is filled by wash mill and deacidifion
Composition two big technique main part of absorption and desorption is set, and the washing of ammonia and hydrogen sulfide and stripping desorption technique is made to combine closely
Together.In wash mill, hydrogen sulfide scrubber tower configuration is before Ammonic washing tower, to wash rich ammonium hydroxide that ammonia obtains and be steamed by depickling
Ammonia device is returned removes the hydrogen sulfide in coal gas, shape containing the higher depickling lean solution of ammonia (meet the ratio of ammonia-sulfur required by desulfurization)
At the rich solution containing ammonia and hydrogen sulfide, it is sent to deacidifion device.In deacidifion device, rich solution passes through deacidifion device solution
It inhales obtained depickling lean solution and water stripping (part for distilled ammonia wastewater) sends the use of wash mill circulation desulfurization deamination back to.
Ammonia spirit desulfurization technique compared to other sulfur removal technologies, have only using water as washing medium, coal gas in ammonia be alkali source
Absorption process desulfurization, the advantages of not generating desulfurization waste liquor.But the mechanism for absorbing and desorbing produces its desulfurization index
Certain restrictions.It is specific as follows:
As shown in Figure 1, in existing deacidifion technique, the rich solution 6 to come from desulfurizing tower is mixed into a certain amount of lye 5
Afterwards, a part is directly entered 1 tower top of deacidifion tower, and another part is poor through heat exchanger 2 and 1 side take-off of deacidifion tower
Liquid 7 enters 1 middle part of deacidifion tower after exchanging heat.Deacidifion tower 1 sequentially enter from top to bottom do not preheat rich solution, preheating rich solution and
Remained ammonia 8.Deacidifion tower 1 is passed through steam 9,10 for air lift in remained ammonia entrance top and bottom of tower.Hydrogen sulfide, ammonia
The mixture of gas and vapor is directly escaped in the form of gaseous mixture 3 from tower top, after side line generates lean solution 7 by the extraction of lean pump 11
Desulfurizing tower is returned through heat exchange and is used for coke oven gas desulfurization, and distilled ammonia wastewater 4 is discharged from bottom of tower.
The deacidifion technique of current mating ammonia spirit desulfurization process, the lean solution for desulfurization are adopted from deacidifion tower side line
Go out, when deacidifion tower bottom of tower (or side line steam) load increases, the escaped quantity of ammonia in lean solution can be increased, side line lean solution is caused to contain
Ammonia is insufficient, returns to desulfurizing tower and is difficult to meet desulfurization requirement.If deacidifion tower bottom of tower (or side line steam) load reduces, and meeting
Cause hydrogen sulfide that cannot effectively be extracted from rich solution, keeps hydrogen sulfide insufficient from tower top escaped quantity, while side take-off
Lean solution contain that hydrogen sulfide is more, be equally difficult to meet the desulfurization requirement in desulfurizing tower.In addition, since lye is directly added into rich solution
In, hydrogen sulfide steam stripped quantity from rich solution can be reduced to a certain extent, equally will also result in hydrogen sulfide content in lean solution
Excessive residual, reduces the quality of lean solution.The above reason significantly limits the application range of ammonia spirit desulfurization, and answers scene
There is prodigious limitation with the adjustment parameter that goes into operation.
Invention content
The utility model provides a kind of system of reinforcing deacidifion desorption, by the desorption for improving hydrogen sulfide in rich solution
Efficiency, while preventing excessive ammonia from being escaped from tower top with mixed gas, so as to improve desulfurization lean solution quality, and it is finally reached and carries
The purpose of high desulfurization efficiency.
In order to achieve the above object, the utility model is realized using following technical scheme:
A kind of system for strengthening deacidifion desorption, including deacidifion tower, heat exchanger, lean pump, further include condenser
Or dephlegmator;The top of the deacidifion tower is equipped with gaseous mixture outlet and rich solution entrance, and the middle part of deacidifion tower is equipped with
The lower part of lean solution side take-off mouth, remained ammonia entrance and alkali liquor inlet, deacidifion tower is equipped with heat source entrance, and depickling is steamed
The bottom of ammonia tower sets distilled ammonia wastewater outlet;The gaseous mixture entrance of the condenser or dephlegmator passes through pipeline and deacidifion tower
Gaseous mixture outlet connection, condenser or dephlegmator set gas vent;The rich solution entrance connection heat exchanger of deacidifion tower
First heat transferring medium exports, and the first heat transferring medium entrance of heat exchanger connects rich solution conveyance conduit;The lean solution side of deacidifion tower
Line extraction mouth is sequentially connected the second heat transferring medium entrance of lean pump and heat exchanger, the second heat transferring medium of heat exchanger by pipeline
Outlet connection lean solution conveyance conduit.
The condenser is additionally provided with condensate outlet, and condensate outlet connects the condensation of deacidifion top of tower by pipeline
Liquid entrance.
Between the rich solution entrance and lean solution side take-off mouth of the deacidifion tower, remained ammonia entrance and alkali liquor inlet it
Between, between alkali liquor inlet and heat source entrance one to multiple layer filler or tower tray is respectively set.
The heat source entrance connection steam conveying pipe or reboiler of the deacidifion tower.
Compared with prior art, the utility model has the beneficial effects that:
1) it while reinforcing vulcanization desorption, avoids ammonia effusion excessive, to improve the quality of lean solution, and is finally reached
Improve the purpose of desulfuration efficiency.
2) compared with existing deacidifion technique, take up an area without additional increase, be conveniently operated.
Description of the drawings
Fig. 1 is the flow chart of existing deacidifion technique.
Fig. 2 is a kind of (deacidifion tower top of structural schematic diagram one for strengthening deacidifion desorption system described in utility model
If condenser).
Fig. 3 is a kind of (deacidifion tower top of structural schematic diagram two for strengthening deacidifion desorption system described in utility model
If dephlegmator).
In figure:1. 6. rich solution of deacidifion tower 2. heat exchanger, 3. gaseous mixture, 4. distilled ammonia wastewater, 5. lye, 7. lean solution
8. 9. steam of remained ammonia (enters) 10. steam (the lower part entrance of deacidifion tower) 11. lean pumps in the middle part of deacidifion tower
12. 13. dephlegmator of condenser
Specific implementation mode
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings:
As shown in Figure 2 and Figure 3, a kind of system for strengthening deacidifion desorption described in the utility model, including deacidifion tower
1, heat exchanger 2, lean pump 11 further include condenser 12 or dephlegmator 13;It is arranged equipped with gaseous mixture at the top of the deacidifion tower 1
The middle part of outlet and rich solution entrance, deacidifion tower 1 is equipped with lean solution side take-off mouth, remained ammonia entrance and alkali liquor inlet, takes off
The lower part of sour ammonia still 1 is equipped with heat source entrance, and the bottom of deacidifion tower 1 sets distilled ammonia wastewater outlet;The condenser
12 or the gaseous mixture entrance of dephlegmator 13 connect with the gaseous mixture outlet of deacidifion tower 1 by pipeline, condenser 12 or point
Contracting device 13 sets gas vent;The first heat transferring medium outlet of the rich solution entrance connection heat exchanger 2 of deacidifion tower 1, heat exchanger 2
First heat transferring medium entrance connects rich solution conveyance conduit;The lean solution side take-off mouth of deacidifion tower 1 is sequentially connected by pipeline
Second heat transferring medium entrance of lean pump 11 and heat exchanger 2, the second heat transferring medium outlet connection lean solution delivery pipe of heat exchanger 2
Road.
The condenser 12 is additionally provided with condensate outlet, and condensate outlet connects 1 top of deacidifion tower by pipeline
Condensate inlet.
Between the rich solution entrance and lean solution side take-off mouth of the deacidifion tower 1, remained ammonia entrance and alkali liquor inlet
Between, between alkali liquor inlet and heat source entrance one to multiple layer filler or tower tray is respectively set.
The heat source entrance connection steam conveying pipe or reboiler of the deacidifion tower 1.
It is as follows based on a kind of reinforcing deacidifion desorption technique for strengthening deacidifion desorption system described in the utility model:
1) lean solution 7 that the rich solution 6 from desulfurization washing tower 1 enters heat exchanger 2 and produced from depickling ammonia still 1 carries out hot friendship
It changes, the rich solution after heat exchange enters deacidifion tower 1 from top;
2) enter deacidifion tower 1 rich solution 6 flow downward, 1 bottom of deacidifion tower feed steam 10 or boil again
Under the heat effect that device provides, hydrogen sulfide and ammonia in rich solution 6 are extracted, and rich solution 6 is converted into lean solution 7 from lean solution side line
Extraction mouth is plucked out of;The lean solution 7 of extraction enters heat exchanger 2 and the rich solution 6 from desulfurization washing tower under the driving of lean pump 11
Heat exchange, is then sent to external desulfurization unit;
3) hydrogen sulfide and ammonia being extracted out of deacidifion tower 1 are mixed with steam, and the gaseous mixture 3 of formation is to tower
Top flowing, under the action of condenser 12 or dephlegmator 13, the steam carried secretly in gaseous mixture is condensed to form condensate liquid;It is cold
Lime set flows downward from tower top, and is come into full contact with gaseous mixture 3;
4) remained ammonia 8 sent from external other workshop sections enters 1 middle part of deacidifion tower, is steamed with depickling is entered from lower part
After the lye 5 of ammonia tower 1 contacts, in the case where steam 10 or reboiler provide the heat effect of heat, the ammonia in remained ammonia 8 is carried
It takes out, and distilled ammonia wastewater 4 is formed in 1 bottom of deacidifion tower, be discharged by distilled ammonia wastewater outlet;
5) ammonia extracted from remained ammonia 8 flows up in tower, contacts with lean solution 7 and condensate liquid, partly enters
Lean solution 7 partly enters condenser 12 or dephlegmator 13 with gaseous mixture 3 from tower top.
The utility model at 1 top of deacidifion tower by being arranged condenser 12 or dephlegmator 13, by the water in gaseous mixture 4
Vapour condenses out, and the condensate liquid based on water is back to 1 tower top of deacidifion tower, since the solubility of ammonia in water is remote
More than the solubility of hydrogen sulfide in water, the ammonia in gaseous mixture 3 in deacidifion tower 1 can be carried out using the condensate liquid of reflux
It absorbs again, on the one hand reduces the condensate liquid that the ammonia in gaseous mixture 3 escapes, while absorbing ammonia and enter lean solution 7, can increase
Ammon amount in lean solution 7 is conducive to the efficiency for improving desulfurizing tower.
By the way that alkali liquor inlet is arranged below 1 remained ammonia entrance of deacidifion tower, lye 5 is made only to be connect with remained ammonia 8
It touches, while the steam stripping efficiency of ammonia in improving to remained ammonia 8, hydrogen sulfide steam stripping efficiency in rich solution 6 will not be caused to decline.
By adding the reasonable adjustment of alkali position and to the proper treatment of gaseous mixture, it can be achieved that effective tune to 7 mass of lean solution
Section and control, realize the Optimum Operation of deacidifion system.
The preferable specific implementation mode of the above, only the utility model, but the scope of protection of the utility model is not
Be confined to this, any one skilled in the art within the technical scope disclosed by the utility model, according to this practicality
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (4)
1. a kind of system for strengthening deacidifion desorption, which is characterized in that including deacidifion tower, heat exchanger, lean pump, also wrap
Include condenser or dephlegmator;The top of the deacidifion tower is equipped with gaseous mixture outlet and rich solution entrance, deacidifion tower
Middle part is equipped with lean solution side take-off mouth, remained ammonia entrance and alkali liquor inlet, and the lower part of deacidifion tower enters equipped with heat source
Mouthful, the bottom of deacidifion tower sets distilled ammonia wastewater outlet;The gaseous mixture entrance of the condenser or dephlegmator by pipeline with
The gaseous mixture outlet of deacidifion tower connects, and condenser or dephlegmator set gas vent;The rich solution entrance of deacidifion tower connects
The first heat transferring medium outlet of heat exchanger is connect, the first heat transferring medium entrance of heat exchanger connects rich solution conveyance conduit;Deacidifion
The lean solution side take-off mouth of tower is sequentially connected the second heat transferring medium entrance of lean pump and heat exchanger by pipeline, and the of heat exchanger
Two heat transferring mediums outlet connection lean solution conveyance conduit.
2. a kind of system for strengthening deacidifion desorption according to claim 1, which is characterized in that the condenser is also set
There are condensate outlet, condensate outlet to connect the condensate inlet of deacidifion top of tower by pipeline.
3. a kind of system for strengthening deacidifion desorption according to claim 1, which is characterized in that the deacidifion tower
Rich solution entrance and lean solution side take-off mouth between, between remained ammonia entrance and alkali liquor inlet, alkali liquor inlet and heat source
One to multiple layer filler or tower tray are respectively set between entrance.
4. a kind of system for strengthening deacidifion desorption according to claim 1, which is characterized in that the deacidifion tower
Heat source entrance connection steam conveying pipe or reboiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820261571.4U CN207998584U (en) | 2018-02-22 | 2018-02-22 | A kind of system for strengthening deacidifion desorption |
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|---|---|---|---|
| CN201820261571.4U CN207998584U (en) | 2018-02-22 | 2018-02-22 | A kind of system for strengthening deacidifion desorption |
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| CN207998584U true CN207998584U (en) | 2018-10-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108384582A (en) * | 2018-02-22 | 2018-08-10 | 中冶焦耐(大连)工程技术有限公司 | A kind of system and technique for strengthening deacidifion desorption |
| CN109704366A (en) * | 2019-02-11 | 2019-05-03 | 中冶焦耐(大连)工程技术有限公司 | A kind of technique and system of the coupling of pressurization deacidifion heat |
-
2018
- 2018-02-22 CN CN201820261571.4U patent/CN207998584U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108384582A (en) * | 2018-02-22 | 2018-08-10 | 中冶焦耐(大连)工程技术有限公司 | A kind of system and technique for strengthening deacidifion desorption |
| CN108384582B (en) * | 2018-02-22 | 2024-02-13 | 中冶焦耐(大连)工程技术有限公司 | System and process for strengthening deacidification, ammonia distillation and desorption |
| CN109704366A (en) * | 2019-02-11 | 2019-05-03 | 中冶焦耐(大连)工程技术有限公司 | A kind of technique and system of the coupling of pressurization deacidifion heat |
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