CN205127675U - Flue gas desulfurization device - Google Patents

Flue gas desulfurization device Download PDF

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Publication number
CN205127675U
CN205127675U CN201520784710.8U CN201520784710U CN205127675U CN 205127675 U CN205127675 U CN 205127675U CN 201520784710 U CN201520784710 U CN 201520784710U CN 205127675 U CN205127675 U CN 205127675U
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absorption tower
regenerator
flue gas
solution
connects
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CN201520784710.8U
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林敏�
武斌
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Jiangsu Landian Environmental Protion Co Ltd
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Jiangsu Landian Environmental Protion Co Ltd
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Abstract

The utility model relates to a flue gas desulfurization device, including absorption tower and regenerator column, the absorption tower lower part connects the flue gas pipeline, the absorption tower top trachea that runs in, absorption tower bottom divides two the tunnel through the rich solution pump, returns the absorption tower middle part all the way, and regenerator column upper portion is connected through a solution heat exchanger hot journey in another way, regenerator column lower part steam -out (SO) pipeline, and absorption tower upper portion is connected through another hot journey of solution heat exchanger, lean solution pump, lean solution cooler in the regenerator column bottom, and the regeneration separator is connected through the regenerative cooling ware in the regenerator column top, and the regeneration separator returns liquid respectively and connects regenerator column upper portion and externally give vent to anger.

Description

A kind of flue gas desulfur device
Technical field
The invention belongs to gas separation, be specifically related to the desulfurizer of sulfur-containing smoke gas.
Background technology
SO 2as one of the predominant gas of atmosphere pollution, cause the extensive concern of people.In order to effectively suppress say benefit serious sulfur dioxide and nitrogen oxide to the pollution of atmospheric environment, countries in the world particularly developed country this has been long-term and unremitting effort, develop more than 200 kind of desulphurization denitration technology.SO 2desulfurization and rear desulfurization (being also called flue gas desulfurization) of burning in desulfurization before control technology can be divided into burning, burning.Wherein, flue gas desulfurization (FGD) is current most widely used general, technology that desulfuration efficiency is the highest, Ye Shi various countries control SO 2the technical way of discharge, within period quite long from now on, FGD will be control SO 2the main method of discharge.
Generally speaking, flue gas desulfurization technique can be divided into two large classes, namely abandons method and absorption method.Be limestone/gypsum method abandoning prevailing in method, the method technical maturity, desulfuration efficiency is high, is most widely used, but investment cost is high, and can produce certain waste water and solid product. can secondary pollution be caused as dealt with improperly.In absorption method, most attraction is active carbon adsorption, and its operation is comparatively simple, can obtain liquid sulfur dioxide or the product such as sulfuric acid, sulphur, but due to investment and operating cost higher, fail to be applied widely.
At present, Regeneratable wet fuel gas desulfurizing technology Application comparison is successfully the CANSOLV technique of Canadian Kang Shifu company and the LABSORB technique of DuPond-BELCO company of the U.S..The reproducible Wet Flue Gas Desulfurization Technique of solvent utilizes the SO in absorbent absorption gas 2, formed and be rich in SO 2rich absorbing liquid, then regenerated by rich absorbing liquid, the absorbent after regeneration recycles, and regeneration discharges the SO of high concentration 2can high value-added product be produced, plant investment and operating cost low, floor space is few, has good environment and economy benefit.
But because sulfide in flue gas content is low, do not reach its maximum absorbance capacity from the absorbing liquid out on absorption tower, be just conveyed to and regenerated, waste the absorbability of absorbent on the one hand, too increase the thermic load of absorbent regeneration on the other hand.
Summary of the invention
For the deficiency that in prior art, flue gas desulfurization absorbent utilization rate is low, regeneration energy consumption is high, the invention provides the renewable flue gas desulfur device of a kind of novel dissolvent, can solve the problem problem effectively.
Technical scheme of the present invention is: a kind of flue gas desulfurization technique, flue gas ash removal, enter after cooling absorption tower from bottom to top with solution counter current contacting, sulfide in flue gas absorbs by solution, purified gas is from tower top emptying, the rich solution absorbing sulfide is drawn by rich solution pump at the bottom of absorption tower, a part returns in the middle part of absorption tower and re-starts absorption, another part carries out heat exchange with lean solution in solution heat exchanger, after heat exchange, pine is to regenerator top, contact with the steam counter-flow risen in regenerator and obtain and regenerate, lean solution after regeneration through solution heat exchanger and by lean solution cooler cool after send into absorb tower top use as solution, the gas of being discharged by regeneration overhead enters regeneration gas cooler, regeneration separators is by the water vapour cooling in gas, divide drop to reclaim and send system back to maintain System Solution concentration, regeneration separators discharges regeneration gas.
Further, described solution is one or more mixing in citrate buffer, phosphate buffer, organic amine buffer solution.
A kind of flue gas desulfur device, comprise absorption tower and regenerator, bottom, absorption tower connects flue gas pipeline, run in top, absorption tower tracheae, two-way is divided through rich solution pump bottom described absorption tower, one tunnel returns in the middle part of absorption tower, another road connects regenerator top through the hot journey of solution heat exchanger one, regenerator bottom steam-out (SO) pipeline, top, absorption tower is connected through another hot journey of solution heat exchanger, lean pump, lean solution cooler bottom regenerator, regenerator top connects regeneration separators through re-generatively cooled device, and regeneration separators is returned liquid respectively and connected regenerator top and externally give vent to anger.
Further, described steam pipework is reboiler steam pipeline.
Further, described blast pipe is provided with back the gas-liquid separator that liquid connects absorption tower.
Adopt above technical scheme, the invention has the beneficial effects as follows:
1, through the flue gas of dedusting, cooling process enter bottom absorption tower with above the solution counter current contacting of getting off, the sulfide in gas is absorbed, and purified gas out enters gas-liquid separator from tower top and reclaims emptying after the drop of entrained with.Solution is one or more in citrate buffer, phosphate buffer or organic amine buffer solution, can adopt different formulations neatly, be conducive to improving flue gas desulphuization rate according to processed flue gas characteristic.
2, an absorption tower rich solution part is out returned in the middle part of absorption tower reuptake, effectively can utilize the absorptive capacity of solution, reduce the amount of solution going to regenerate, thus improve absorbent solution utilization rate, reduce the energy consumption needed for subsequent regeneration.
3, the rich solution absorbing sulfide is drawn at the bottom of absorption tower, and another part delivers to regenerator top through solution heat exchanger heat absorption, is conducive to improving rich solution temperature, promotes regenerative response after heat absorption, reduces regenerator steam energy consumption; Contact with the steam counter-flow risen in regenerator and obtain and regenerate, lean solution after regeneration is sent into absorption tower jacking row and is absorbed after solution heat exchanger cooling, cool further through lean solution cooler again and send absorption tower back to, be conducive to reducing flue gas discharge temperature, improve the absorptivity of absorbent.
4, enter regeneration gas cooler from regeneration overhead gas out the water vapour gas is reclaimed, regenerator is reclaimed back by regeneration separators, coordinate water vapour in gas-liquid separator reclaiming clean gas, can effectively maintain solution concentration in W-response system, guarantee reaction, need not supplement by moisture, reduce energy consumption.
Accompanying drawing explanation
Fig. 1 is apparatus of the present invention structural representation.
In figure: absorption tower 1, flue gas pipeline 2, blast pipe 3, gas-liquid separator 4, rich solution pump 5, solution heat exchanger 6, regenerator 7, lean pump 8, lean solution cooler 9, steam pipework 10, reboiler 11, re-generatively cooled device 12, regeneration separators 13.
Detailed description of the invention
The invention will be further described below by way of embodiments and drawings, but it does not limit the scope of the invention.
A kind of flue gas desulfurization technique, flue gas ash removal, enter after cooling absorption tower from bottom to top with solution counter current contacting, sulfide in flue gas absorbs by solution, purified gas is from tower top emptying, the rich solution absorbing sulfide is drawn by rich solution pump at the bottom of absorption tower, a part returns in the middle part of absorption tower and re-starts absorption, another part carries out heat exchange with lean solution in solution heat exchanger, after heat exchange, pine is to regenerator top, contact with the steam counter-flow risen in regenerator and obtain and regenerate, lean solution after regeneration through solution heat exchanger and by lean solution cooler cool after send into absorb tower top use as solution, the gas of being discharged by regeneration overhead enters regeneration gas cooler, regeneration separators is by the water vapour cooling in gas, divide drop to reclaim and send system back to maintain System Solution concentration, regeneration separators discharges regeneration gas.Solution is one or more mixing in citrate buffer, phosphate buffer, organic amine buffer solution.
A kind of flue gas desulfur device shown in Fig. 1 comprises absorption tower 1 and regenerator 7, bottom, absorption tower 1 connects flue gas pipeline 2, run in top, absorption tower 1 tracheae 3, blast pipe 3 is provided with back the gas-liquid separator 4 that liquid connects absorption tower, through rich solution pump 5 points of two-way bottom absorption tower 1, one tunnel returns in the middle part of absorption tower 1, another road connects regenerator 7 top through the hot journey of solution heat exchanger 6 one, the steam pipework 10 of tape splicing reboiler 11 outside regenerator 7 bottom, through another hot journey of solution heat exchanger 6 bottom regenerator 7, lean pump 8, lean solution cooler 9 connects top, absorption tower 1, regenerator 7 top connects regeneration separators 13 through re-generatively cooled device 12, regeneration separators is returned liquid respectively and is connected regenerator 7 top and externally give vent to anger.

Claims (3)

1. a flue gas desulfur device, comprise absorption tower and regenerator, bottom, absorption tower connects flue gas pipeline, run in top, absorption tower tracheae, it is characterized in that: bottom described absorption tower, divide two-way through rich solution pump, one tunnel returns in the middle part of absorption tower, another road connects regenerator top through the hot journey of solution heat exchanger one, regenerator bottom steam-out (SO) pipeline, through another hot journey of solution heat exchanger bottom regenerator, lean pump, lean solution cooler connects top, absorption tower, regenerator top connects regeneration separators through re-generatively cooled device, regeneration separators is returned liquid respectively and is connected regenerator top and externally give vent to anger.
2. a kind of flue gas desulfur device according to claim 1, is characterized in that: described steam pipework is reboiler steam pipeline.
3. a kind of flue gas desulfur device according to claim 1, is characterized in that: described blast pipe is provided with back the gas-liquid separator that liquid connects absorption tower.
CN201520784710.8U 2015-10-12 2015-10-12 Flue gas desulfurization device Active CN205127675U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105617840A (en) * 2015-10-12 2016-06-01 江苏蓝电环保股份有限公司 Exhaust gas desulfurization device
CN110124451A (en) * 2019-05-13 2019-08-16 上海大学 SO in wet type substep removing flue gas2With the method for NO
CN111569604A (en) * 2020-05-18 2020-08-25 中国华能集团有限公司 Low-temperature flue gas adsorption desulfurization method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105617840A (en) * 2015-10-12 2016-06-01 江苏蓝电环保股份有限公司 Exhaust gas desulfurization device
CN110124451A (en) * 2019-05-13 2019-08-16 上海大学 SO in wet type substep removing flue gas2With the method for NO
CN110124451B (en) * 2019-05-13 2021-11-05 上海大学 Wet-type step-by-step SO removal in flue gas2And NO process
CN111569604A (en) * 2020-05-18 2020-08-25 中国华能集团有限公司 Low-temperature flue gas adsorption desulfurization method

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