CN203853003U - Smoke desulfurization, denitration and demercuration system with organic absorbent method - Google Patents
Smoke desulfurization, denitration and demercuration system with organic absorbent method Download PDFInfo
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- CN203853003U CN203853003U CN201420290999.3U CN201420290999U CN203853003U CN 203853003 U CN203853003 U CN 203853003U CN 201420290999 U CN201420290999 U CN 201420290999U CN 203853003 U CN203853003 U CN 203853003U
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Abstract
The utility model relates to a smoke desulfurization, denitration and demercuration system with an organic absorbent method. The smoke desulfurization, denitration and demercuration system comprises an absorption tower, an inlet flue and a discharging flue, wherein mixing liquid is arranged at the bottom in the absorption tower. The system further comprises an absorption system, a de-fogging system, an oxidization and neutralization system, a liquid dust removing system, a liquid-liquid separation system and an accident prevention system, wherein the oxidization and neutralization system is communicated with the mixing liquid; the de-fogging system is communicated with the middle upper part of the absorption tower and is located above the liquid surface of the mixing liquid; the liquid dust removing system is communicated with the mixing liquid; the liquid-liquid separation system is communicated with the liquid dust removing system and is further communicated to the middle of the absorption tower; the bottom of the absorption tower, the de-fogging system, the oxidization and neutralization system, the liquid dust removing system and the liquid-liquid separation system are communicated with the accident prevention system. With the adoption of the system provided by the utility model, the circulating utilization of an organic absorbent can be realized and the loss of the organic absorbent is reduced, so that the operation cost is reduced and the economic benefits are enlarged on the basis of guaranteeing the smoke treatment effect.
Description
Technical field
The utility model relates to a kind of organic absorbent method flue gas desulfurization and denitrification demercuration system, belongs to flue gas process field.
Background technology
Existing flue gas processing device; substantially be all to take absorption tower as main body; utilize organic absorbent to carry out the purification of flue gas; pollutant sulfur dioxide, nitrogen oxide in flue gas are turned waste into wealth; final ammonium sulfate, the ammonium nitrate fertilizer of forming; in prior device, conventionally can adopt some simple devices to carry out the recovery of organic absorbent, recycle subsequently.
But for the extraordinary organic absorbent of some effects, it involves great expense, cost is very high, and adopt traditional flue gas processing device, although there is easy recovery system, but still there is serious loss for organic absorbent, thereby brought the organic absorbent cost of a large amount of great numbers, be unfavorable for the economic benefit of whole device.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of organic absorbent method flue gas desulfurization and denitrification demercuration system, the organic absorbent that this system is used is disposable adding before equipment investment operation, can substantially keep being cycled to repeat use, reduce greatly the loss of organic absorbent, increase running time, reduce costs, increase economic efficiency.In the time detecting that in absorption tower, organic absorbent concentration has obvious reduction, can augment a certain amount of organic absorbent, the amount of covering the loss, ensures adsorption effect.
The absorbent that the utility model adopts is the mixed liquor (calling absorbent in the following text) of water and organic absorbent, preparation by a certain percentage, wherein organic absorbent is the highly stable emulsion organic compound of a class that one contains sulfinyl (>S=O) functional group, by ariel university of Israel and the common development and production of applicant, apply for patent, this organic absorbent is to the sulfur dioxide in flue gas, the sour gas such as nitrogen oxide have strong capture ability, and to desulfurization, denitration has the facilitation of forward reaction, heavy metal especially mercury is had to strong suction-operated simultaneously.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of organic absorbent method flue gas desulfurization and denitrification demercuration system, comprise absorption tower, enter flue and discharge flue, the described flue that enters is communicated with middle and lower part, absorption tower, bottom in described absorption tower is provided with mixed liquor, the described level height of flue and absorption tower connectivity part that enters is higher than the level height of described mixed liquor liquid level, and described discharge flue is communicated with the top on absorption tower.This system also comprises absorption system, demister system, oxidation neutralized system, liquid dust removing system, liquid liquid separation system, accident prevention system.Described oxidation neutralized system is communicated with described mixed liquor, described demister system is communicated with the middle and upper part on described absorption tower and is positioned at the top of described mixed liquor liquid level, mixed liquor described in described liquid dust removing system connectivity, described liquid liquid separation system is connected with described liquid dust removing system and is communicated to the middle part on described absorption tower, bottom, demister system, oxidation neutralized system, liquid dust removing system and the liquid liquid separation system on described absorption tower all with described accident prevention system connectivity.
On the basis of technique scheme, the utility model can also do following improvement.
Further, described in, enter and on flue, be connected with strong oxidizer admission passage.
The flue gas being come by boiler enters the absorption tower of native system through entering flue.Flue gas enters before absorption tower, toward after wherein adding strong oxidizer, strong oxidizer to enter in flue gas, the nitrogen oxide of lower valency is wherein oxidized to the nitrogen oxide of high valence state by strong oxidizer admission passage.If do not contain nitrogen oxide in flue gas or content is extremely low, do not need denitration, in flue gas, do not add strong oxidizer.The strong oxidizer adopting, as ozone, hydrogen peroxide, also can add the oxidant of other oxidable Low-Charged Nitrogen oxide in Practical Project.
In absorption tower, the atmosphere pollution such as the sulfur dioxide that contains in flue gas, nitrogen oxide, mercury is absorbed by organic absorbent, makes it to be purified, and has avoided the impact of pollutant on atmosphere and surrounding environment.
Further, described absorption system comprises several absorbent recirculation pumps, the water inlet pipe of described absorbent recirculation pump is communicated with described mixed liquor, the outlet pipe end of described absorbent recirculation pump is provided with several spray heads that Open Side Down, and extend into inside, described absorption tower, the level height of the outlet pipe end of described absorbent recirculation pump is higher than the level height of the described connectivity part that enters flue and described absorption tower.
In absorption system, to the agent of flue gas spray-absorption, after sulfur dioxide, nitrogen oxide, mercury and dust etc. in the organic absorbent absorption flue gas in absorbent, dropped in mixed liquor by Action of Gravity Field.Absorbent is provided by absorbent recirculation pump, delivers to spray head spray flue gas, after the pollutant in absorption oxygen, drops in the mixed liquor on absorption tower, arrives spray head more afterwards, so circulated sprinkling flue gas by absorbent recirculation pump.
Principle of absorption is as follows:
Sulfur dioxide absorption:
SO
2+H
2O→H
2SO
3
H
2sO
3+ LPC (organic absorbent) → LPCH
2sO
3
Absorbing NOx:
NO+ strong oxidizer → N
2o
3+ NO
2+ H
2o
N
2O
3+NO
2+H
2O→HNO
3+HNO
2
HNO
2+LPC→LPC·HNO
2
The suction-operated of organic absorbent in absorbent to heavy metal, can adsorb the little mercury of content in flue gas and other heavy metals constantly.Whether organic absorbent is no matter saturated for the absorption of mercury and other metals, do not affect normally carrying out of desulfurization and denitrating technique.Organic absorbent, after the heavy metals such as Adsorption of Mercury reach capacity, can be drawn organic absorbent outside absorption tower and make organic absorbent again have the ability of the heavy metals such as Adsorption of Mercury by specific mode.
Further, described oxidation neutralized system comprises air hose, ammonia water pipe and tank used for storing ammonia, on described air hose, be also connected with oxidation fan, the end of described air hose extend into the bottom of described mixed liquor, and be connected with several air spargers, described ammonia water pipe is connected with described tank used for storing ammonia, and described tank used for storing ammonia is communicated with described mixed liquor by ammoniacal liquor supply pump.
The utility model adopts oxidation in tower.In the mixed liquor on absorption tower, the sulfurous acid, the nitrous acid that produce are sulfuric acid, nitric acid by the air oxidation passing into from bottom, absorption tower, separate with organic absorbent, then sulfuric acid, nitric acid react with antalkali (the utility model use ammoniacal liquor), generate ammonium sulfate and ammonium nitrate, reaction equation is as follows:
LPC·H
2SO
3+O
2→H
2SO
4+LPC
H
2SO
4+NH
3+H
2O→(NH
4)
2SO
4+H
2O
LPC·HNO
2+O
2→HNO
3+LPC
HNO
3+NH
3→NH
4NO
3
LPC in reaction equation refers to organic absorbent.
After peroxidating, neutralization, the organic absorbent that has adsorbed pollutant is regenerated, and possesses adsorption capacity.
The ammoniacal liquor of outsourcing enters tank used for storing ammonia by ammonia water pipe, is got in the mixed liquor on absorption tower by ammoniacal liquor supply pump, goes neutralization to absorb the sulfuric acid, the nitric acid that produce.If ammonia concn is high, can add fresh water (FW) dilution; As outsourcing liquefied ammonia, also should dilute.Squeezing into the ammonia vol on absorption tower controls according to the pH value of absorption tower mixed liquor section.
The required air of oxidation sulfurous acid is provided by oxidation fan, and is uniformly distributed by the air sparger in absorption tower.
Further, described demister system comprises washings knockout drum, technique water pipe, fresh water (FW) storage tank, rise gas cap dividing plate, demister and packing layer, the described gas cap dividing plate that rises, demister and packing layer are all positioned at described absorption tower, the described level height of gas cap dividing plate that rises is higher than the level height of the outlet pipe of described absorbent recirculation pump, described rise gas cap dividing plate above be provided with the demister that several are arranged in parallel up and down, the top of described demister is provided with packing layer, be equipped with except fog spray head in the above and below of described demister and described packing layer, described rise gas cap dividing plate above be also provided with except fog spray head, described technique water pipe is connected with described fresh water (FW) storage tank, described fresh water (FW) storage tank is communicated with respectively described except fog spray head by washings circulating pump, described fresh water (FW) storage tank is also communicated with and is entered flue by washings circulating pump, the described gas cap dividing plate bottom that rises is provided with the washings outlet of stretching out outside described absorption tower, described washings outlet is communicated with described washings knockout drum, described washings knockout drum is communicated with respectively described fresh water (FW) storage tank and described mixed liquor by washings knockout drum rear pump.
The fresh water (FW) being come by the external world enters fresh water (FW) storage tank by technique water pipe, reach spraying except in fog spray head in absorption tower through washings circulating pump, washing flue gas, and rinse demister, packing layer, to rising on gas cap dividing plate, after collecting, flow to washings knockout drum by pipeline by Action of Gravity Field lower floor.
In washings knockout drum, the layering due to density contrast of material wherein, upper strata is organic absorbent, lower floor is water (containing few sulphur, acid and the salt of nitrogen).After layering, lower floor does not get to fresh water (FW) storage tank containing the water of organic absorbent through washings knockout drum rear pump, reaches recycling of fresh water (FW).In the time that the washings of lower floor in washings knockout drum will have been beaten gradually, switch valve, makes the organic absorbent on upper strata enter in absorption tower by pipeline, and organic absorbent is recycled.In order to ensure that organic absorbent and water have good separating effect, two washings knockout drums are set, be used alternatingly, in Practical Project, can be designed to more than one or two according to inventory.In running, because organic absorbent amount is less, can, after the water of lower floor has been beaten, continue to add the demister coming from absorption tower, the washings of packing layer, wait the organic absorbent in washing water separation tank run up to a certain amount of after, then switch valve is got in absorption tower.
For ensureing the clean result of technique washings, when the acid wherein containing, salt or dust etc. reach after finite concentration, a part of in absorption tower by the bypass line shunting of washings circulating-pump outlet pipeline, the fresh water (FW) of minimizing is by out-of-bounds supplementing.
Flue gas passes through after the demister and packing layer in absorption tower, and a small amount of mist (as the acid of water, organic absorbent, sulphur and nitrogen, salt) overwhelming majority of wherein carrying secretly is removed and reclaims, and makes flue gas qualified discharge.
In described absorption tower, between absorber portion and demist section, one deck is set and rises gas cap dividing plate, gas can pass through from bottom to top, and liquid can not pass through downwards.
In order to control, to enter the flue-gas temperature on absorption tower stable, adds shower nozzle entering in flue, and the water of cooling use is provided by the washings circulating pump of demister system.
Further, described liquid dust removing system comprises slurry pool, solid-liquid separator and filtrate receiver, described mixed liquor is communicated with described slurry pool by mixed liquor excavationg pump, in described slurry pool, be provided with slurry pool mixer, described slurry pool is also circumscribed with steam pipe, described slurry pool is communicated with described solid-liquid separator by Separation of Solid and Liquid feed pump, the isolated solid of described solid-liquid separator forms filter cake, the isolated liquid of described solid-liquid separator is sent in filtrate receiver, and described filtrate receiver is communicated with described liquid liquid separation system by filtrate rear pump.
In absorption tower, absorbent circulation absorbs pollutant and a small amount of dust in flue gas, sulfur dioxide wherein, nitrogen oxide through in oxidation, ammonia and after, finally form ammonium sulfate and ammonium nitrate.Mixed liquor density in absorption tower reaches after certain value, get to the slurry pool outside absorption tower through mixed liquor excavationg pump, in slurry pool, add filter aid, stir through slurry pool stirrer, form after more uniform slurries, got in solid-liquid separator by Separation of Solid and Liquid feed pump.The utility model adopts plate and frame filter press to separate, and also can adopt the other forms of equipment that can realize Chalk-dust filtering in Practical Project.Slurries are after solid-liquid separator, and dust-filtering gets off, and form filter cake and remove, and filtrate flows to filtrate receiver, gets to liquid liquid separation system more afterwards by filtrate rear pump, carries out next step separation and recycles.
Carry organic absorbent secretly for reducing in filter cake, should in slurry pool, add appropriate steam (realizing by steam pipe), control temperature at 50～60 DEG C.
If Dust Capacity is less in the mixed liquor that mixed liquor excavationg pump is discharged, do not need to enter slurry pool, directly enter solid-liquid separator.
Further, described liquid liquid separation system comprises a not good liquor liquid knockout drum, two not good liquor liquid/gas separators, salt liquid storage tank, reclaim absorbent storage tank and chemical fertilizer system, described filtrate receiver is communicated with a described not good liquor liquid knockout drum by filtrate rear pump, a described not good liquor liquid knockout drum is communicated with two not good liquor liquid/gas separators by a not good liquor liquid knockout drum rear pump, described two not good liquor liquid/gas separators are communicated with respectively described salt liquid storage tank and reclaim absorbent storage tank, described salt liquid storage tank is communicated with chemical fertilizer system by saline solution rear pump, described recovery absorbent storage tank returns tower pump by absorbent and is communicated with described absorption tower, its connectivity part level height is between the outlet pipe end of described mixed liquor liquid level and described absorbent recirculation pump.
Obtain through solid-liquid separator the mixed liquor that filtrate is ammonium salt and organic absorbent, water, get in a not good liquor liquid knockout drum and carry out after the initial gross separation of organic absorbent and saline solution through filtrate rear pump, the saline solution of one not good liquor liquid knockout drum lower floor is got in two not good liquor liquid/gas separators through a not good liquor liquid knockout drum rear pump, and the organic absorbent on upper strata directly turns back in absorption tower.
Described saline solution refers to the not ammonium salt solution containing organic absorbent.
In order to ensure that organic absorbent and saline solution have good separating effect, two not good liquor liquid knockout drums are set, be used alternatingly, in Practical Project, can be designed to more than one or two according to inventory.
The saline solution coming from a not good liquor liquid knockout drum rear pump is through after two not good liquor liquid/gas separators, saline solution is thoroughly separated with organic absorbent, isolated saline solution enters salt liquid storage tank, get to chemical fertilizer system by saline solution rear pump and prepare ammonium sulfate, ammonium nitrate mixed fertilizer, and organic absorbent enters recovery absorbent storage tank, return tower pump by absorbent and get in absorption tower.
Further, described accident prevention system comprises melt pit and emergency storage tank, the bottom on described tank used for storing ammonia, washings knockout drum, fresh water (FW) storage tank, absorption tower, a not good liquor liquid knockout drum, salt liquid storage tank, recovery absorbent storage tank are all connected with described melt pit, in described melt pit, be also provided with melt pit mixer, described melt pit is connected with described emergency storage tank, described melt pit is communicated with described mixed liquor by sump pump, and described emergency storage tank also returns to pump by accident and is communicated with described mixed liquor.
The utility model is designed with a melt pit, and in the time that abnormal, overhaul of the equipments, parking maintenance appear in system, the material in each storage tank can flow in melt pit by the blow-off pipe of bottom, overflow pipe.Get rid of after recovery normally until abnormal, by sump pump, material is returned in absorption tower, re-use.Pit stirrer is installed on melt pit.
Break down and maybe need maintenance the mixed liquor of the inside need be discharged out when absorption tower, got in emergency storage tank by mixed liquor excavationg pump, tower to be absorbed returns to pump by emergency storage tank again after handling well and gets in absorption tower.
Further, described discharge flue is provided with a downward crooked flue, and described crooked flue passes through shower pipe and is communicated with described melt pit.
Flue gas enters behind absorption tower, upwards rises, and successively through absorption system, the demister system on absorption tower, last clean flue gas enters discharges flue discharged to atmosphere.In the discharge flue connecting at top, absorption tower, a downward crooked flue is set, the steam Yin Wendu that carries secretly is reduced and condenses into after liquid state by falling shower pipe and enter melt pit (the recyclable organic absorbent of carrying secretly) in flue gas.
In system of the present utility model, relate to the place that interconnects of pipeline, be equipped with and control the one-way cock that pipeline is opened or closed.
The beneficial effects of the utility model are: by the absorption system, demister system, oxidation neutralized system, liquid dust removing system and the liquid liquid separation system that arrange in the utility model, can realize recycling of organic absorbent, reduce the loss of organic absorbent, thereby ensureing on the basis of flue gas treatment effect, reduce operating cost, expanded economic benefit.The utility model is also provided with accident prevention system, can tackle the generation of different accidents, in case of emergency, can reduce to greatest extent loss.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
In accompanying drawing, the list of parts of each label representative is as follows:
1, strong oxidizer, 2, enter flue, 3, technique water pipe, 4, air hose, 5, ammonia water pipe, 6, oxidation fan, 7, tank used for storing ammonia, 8, ammoniacal liquor supply pump, 9, washings knockout drum, 10, washings knockout drum rear pump, 11, fresh water (FW) storage tank, 12, washings circulating pump, 13, emergency storage tank, 14, accident is returned to pump, and 15, sump pump, 16, pit stirrer, 17, melt pit, 18, air sparger, 19, absorption tower, 20, mixed liquor excavationg pump, 21, absorbent recirculation pump, 22, slurry pool mixer, 23, slurry pool, 24, Separation of Solid and Liquid feed pump, 25, steam pipe, 26, filter cake, 27, solid-liquid separator, 28 1 not good liquor liquid knockout drums, 29, one not good liquor liquid knockout drum rear pump, 30, salt liquid storage tank, 31, saline solution rear pump, 32, chemical fertilizer system, 33, absorbent returns tower pump, 34, reclaim absorbent storage tank, 35, two not good liquor liquid/gas separators, 36, filtrate rear pump, 37, filtrate receiver, 38, rise gas cap dividing plate, 39, demister, 40, packing layer, 41, shower pipe, 42, crooked flue, 43, discharge flue.
Detailed description of the invention
Below in conjunction with accompanying drawing, principle of the present utility model and feature are described, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
As shown in Figure 1, a kind of organic absorbent method flue gas desulfurization and denitrification demercuration system, comprise absorption tower 19, enter flue 2 and discharge flue 43, describedly enter the middle and lower part that flue 2 is communicated with described absorption tower 19, bottom in described absorption tower 19 is provided with mixed liquor, the described level height of flue 2 and absorption tower 19 connectivity parts that enters is higher than the level height of described mixed liquor liquid level, described discharge flue 43 is communicated with the top on described absorption tower 19, also comprise absorption system, demister system, oxidation neutralized system, liquid dust removing system, liquid liquid separation system, accident prevention system, described absorption system is communicated with described mixed liquor, described oxidation neutralized system is communicated with described mixed liquor, described demister system is communicated with the middle and upper part on described absorption tower 19 and is positioned at the top of described mixed liquor liquid level, mixed liquor described in described liquid dust removing system connectivity, described liquid liquid separation system is connected with described liquid dust removing system and is communicated to the middle part on described absorption tower 19, the bottom on described absorption tower 19, demister system, oxidation neutralized system, liquid dust removing system and liquid liquid separation system all with described accident prevention system connectivity.In absorption tower 19, the atmosphere pollution such as the sulfur dioxide that contains in flue gas, nitrogen oxide, mercury is absorbed by organic absorbent, makes it to be purified, and has avoided the impact of pollutant on atmosphere and surrounding environment.
Described entering is connected with strong oxidizer admission passage 1 on flue 2.
The flue gas being come by boiler enters the absorption tower 19 of native system through entering flue 2.Flue gas enters before absorption tower 19, toward after wherein adding strong oxidizer, strong oxidizer to enter in flue gas, the nitrogen oxide of lower valency is wherein oxidized to the nitrogen oxide of high valence state by strong oxidizer admission passage 1.If do not contain nitrogen oxide in flue gas or content is extremely low, do not need denitration, in flue gas, do not add strong oxidizer.The strong oxidizer adopting, as ozone, hydrogen peroxide, also can add the oxidant of other oxidable Low-Charged Nitrogen oxide in Practical Project.
Described absorption system comprises several absorbent recirculation pumps 21, the water inlet pipe of described absorbent recirculation pump 21 is communicated with described mixed liquor, the outlet pipe end of described absorbent recirculation pump 21 is provided with several spray heads that Open Side Down, and extend into the inside on described absorption tower 19, the level height of the outlet pipe end of described absorbent recirculation pump 21 is higher than the level height of the described connectivity part that enters flue 2 and described absorption tower 19.
In absorption system, to the agent of flue gas spray-absorption, after sulfur dioxide, nitrogen oxide, mercury and dust etc. in the organic absorbent absorption flue gas in absorbent, dropped in mixed liquor by Action of Gravity Field.Absorbent is provided by absorbent recirculation pump 21, delivers to spray head spray flue gas, after the pollutant in absorption oxygen, drops in the mixed liquor 16 of absorption tower 10 inner bottom parts, arrives spray head more afterwards, so circulated sprinkling flue gas by absorbent recirculation pump 21.The suction-operated of organic absorbent in absorbent to heavy metal, can adsorb the little mercury of content in flue gas and other heavy metals constantly.Whether organic absorbent is no matter saturated for the absorption of mercury and other metals, do not affect normally carrying out of desulfurization and denitrating technique.Organic absorbent, after the heavy metals such as Adsorption of Mercury reach capacity, can be drawn organic absorbent outside absorption tower and make organic absorbent again have the ability of the heavy metals such as Adsorption of Mercury by specific mode.
Described oxidation neutralized system comprises air hose 4, ammonia water pipe 5 and tank used for storing ammonia 7, on described air hose 4, be also connected with oxidation fan 6, the end of described air hose 4 extend into the bottom of described mixed liquor, and be connected with several air spargers 18, described ammonia water pipe 5 is connected with described tank used for storing ammonia 7, and described tank used for storing ammonia 7 is communicated with described mixed liquor by ammoniacal liquor supply pump 8.
The utility model adopts oxidation in tower.In mixed liquor in absorption tower 19, the sulfurous acid, the nitrous acid that produce are sulfuric acid, nitric acid by the air oxidation passing into from 19 bottoms, absorption tower, separate with organic absorbent, then sulfuric acid, nitric acid react with antalkali (the utility model use ammoniacal liquor), generate ammonium sulfate and ammonium nitrate after peroxidating, neutralization, the organic absorbent that has adsorbed pollutant is regenerated, and possesses adsorption capacity.
The ammoniacal liquor of outsourcing enters tank used for storing ammonia 7 by ammonia water pipe 5, is got in the mixed liquor in absorption tower 19 by ammoniacal liquor supply pump 8, goes neutralization to absorb the sulfuric acid, the nitric acid that produce.If ammonia concn is high, can add fresh water (FW) dilution; As outsourcing liquefied ammonia, also should dilute.The ammonia vol of squeezing in absorption tower 19 is controlled according to the pH value of mixed liquor in absorption tower.
The required air of oxidation sulfurous acid is provided by oxidation fan 6, and is uniformly distributed by the air sparger 18 in absorption tower 19.
Described demister system comprises washings knockout drum 9, technique water pipe 3, fresh water (FW) storage tank 11, rise gas cap dividing plate 38, demister 39 and packing layer 40, the described gas cap dividing plate 38 that rises, demister 39 and packing layer 40 are all positioned at described absorption tower 19, the described level height of gas cap dividing plate 38 that rises is higher than the level height of the outlet pipe of described absorbent recirculation pump 21, described rise gas cap dividing plate 38 above be provided with the demister 39 that several are arranged in parallel up and down, the top of described demister 39 is provided with packing layer 40, above and below at described demister 40 and described packing layer 39 is equipped with except fog spray head, described rise gas cap dividing plate 38 above be also provided with except fog spray head, described technique water pipe 3 is connected with described fresh water (FW) storage tank 11, described fresh water (FW) storage tank 11 is communicated with respectively described except fog spray head by washings circulating pump 12, described fresh water (FW) storage tank 11 is also communicated with and enters flue 2 by washings circulating pump 12, described gas cap dividing plate 38 bottoms that rise are provided with the washings outlet of stretching out outside described absorption tower 19, described washings outlet is communicated with described washings knockout drum 9, described washings knockout drum 9 is communicated with respectively described fresh water (FW) storage tank 11 and described mixed liquor by washings knockout drum rear pump 10.
The fresh water (FW) being come by the external world enters fresh water (FW) storage tank 11 by technique water pipe 3, spraying except in fog spray head in washings circulating pump 12 reaches absorption tower 19, washing flue gas, and rinse demister 39, packing layer 40, to rising on gas cap dividing plate 38, after collecting, flow to washings knockout drum 9 by pipeline by Action of Gravity Field lower floor.
In washings knockout drum 9, the layering due to density contrast of material wherein, upper strata is organic absorbent, lower floor is water (containing few sulphur, acid and the salt of nitrogen).After layering, lower floor does not get to fresh water (FW) storage tank 11 containing the water of organic absorbent through washings knockout drum rear pump 10, reaches recycling of fresh water (FW).In the time that the washings of lower floor in washings knockout drum 9 will have been beaten gradually, switch valve, makes the organic absorbent on upper strata enter in absorption tower 19 by pipeline, and organic absorbent is recycled.In order to ensure that organic absorbent and water have good separating effect, two washings knockout drums 9 are set, be used alternatingly, in Practical Project, can be designed to more than one or two according to inventory.In running, because organic absorbent amount is less, can be after the water of lower floor have been beaten, continue to add the demister 39 coming from absorption tower 19, the washings of packing layer 40, wait the organic absorbent in washing water separation tank 9 run up to a certain amount of after, then switch valve is got in absorption tower 19.
For ensureing the clean result of technique washings, when the acid wherein containing, salt or dust etc. reach after finite concentration, a part of in absorption tower 19 by the bypass line shunting of washings circulating pump 12 outlet conduits, the fresh water (FW) of minimizing is supplemented by the external world.
Flue gas passes through after the demister 39 and packing layer 40 in absorption tower 19, and a small amount of mist (as the acid of water, organic absorbent, sulphur and nitrogen, salt) overwhelming majority of wherein carrying secretly is removed and reclaims, and makes flue gas qualified discharge.
Between the interior absorber portion in described absorption tower 19 and demist section, one deck is set and rises gas cap dividing plate 38, gas can pass through from bottom to top, and liquid can not pass through downwards.
In order to control, to enter the flue-gas temperature on absorption tower 19 stable, adds shower nozzle entering in flue 2, and the water of cooling use is provided by the washings circulating pump 12 of demister system.
Described liquid dust removing system comprises slurry pool 23, solid-liquid separator 27 and filtrate receiver 37, described mixed liquor is communicated with described slurry pool 23 by mixed liquor excavationg pump 20, in described slurry pool 23, be provided with slurry pool mixer 22, described slurry pool 23 is also circumscribed with steam pipe 25, described slurry pool 23 is communicated with described solid-liquid separator 27 by Separation of Solid and Liquid feed pump 24, the isolated solid of described solid-liquid separator 27 forms filter cake 26, the isolated liquid of described solid-liquid separator 27 is sent in filtrate receiver 37, described filtrate receiver 37 is communicated with described liquid liquid separation system by filtrate rear pump 36.
In absorption tower 19, absorbent circulation absorbs pollutant and a small amount of dust in flue gas, sulfur dioxide wherein, nitrogen oxide through in oxidation, ammonia and after, finally form ammonium sulfate and ammonium nitrate.Mixed liquor density in absorption tower 19 reaches after certain value, slurry pool 23 outside mixed liquor excavationg pump 20 is got to absorption tower 19 adds filter aid in slurry pool 23, stirs through slurry pool stirrer 22, form after more uniform slurries, got in solid-liquid separator 27 by Separation of Solid and Liquid feed pump 24.The utility model adopts plate and frame filter press to separate, and also can adopt the other forms of equipment that can realize Chalk-dust filtering in Practical Project.Slurries are after solid-liquid separator 27, and dust-filtering gets off, and form filter cake 26 and remove, and filtrate flows to filtrate receiver 37, gets to liquid liquid separation system more afterwards by filtrate rear pump 36, carries out next step separation and recycles.
Carry organic absorbent secretly for reducing in filter cake 26, should in slurry pool 23, add appropriate steam (realizing by steam pipe 25), control temperature at 50-60 DEG C.
If Dust Capacity is less in the mixed liquor that mixed liquor excavationg pump 20 is discharged, do not need to enter slurry pool 23, directly enter solid-liquid separator 27.
Described liquid liquid separation system comprises a not good liquor liquid knockout drum 28, two not good liquor liquid/gas separators 35, salt liquid storage tank 30, reclaim absorbent storage tank 34 and chemical fertilizer system 32, described filtrate receiver 37 is communicated with a described not good liquor liquid knockout drum 28 by filtrate rear pump 36, a described not good liquor liquid knockout drum 28 is communicated with described two not good liquor liquid/gas separators 35 and described absorption tower 19 by a not good liquor liquid knockout drum rear pump 27, described two not good liquor liquid/gas separators 35 are communicated with respectively described salt liquid storage tank 30 and reclaim absorbent storage tank 34, described salt liquid storage tank 30 is communicated with chemical fertilizer system 32 by saline solution rear pump 31, described recovery absorbent storage tank 34 returns tower pump 33 by absorbent and is communicated with described absorption tower 19, its connectivity part level height is between described mixed liquor liquid level and the outlet pipe end of described absorbent recirculation pump 21.
Obtain through solid-liquid separator 27 mixed liquor that filtrate is ammonium salt and organic absorbent, water, get in a not good liquor liquid knockout drum 28 and carry out after the initial gross separation of organic absorbent and saline solution through filtrate rear pump 36, the saline solution of one not good liquor liquid knockout drum 28 lower floors is got in two not good liquor liquid/gas separators 35 through a not good liquor liquid knockout drum rear pump 29, and the organic absorbent on upper strata directly turns back in absorption tower 19.
Described saline solution refers to the not ammonium salt solution containing organic absorbent.
In order to ensure that organic absorbent and saline solution have good separating effect, two not good liquor liquid knockout drums 28 are set, be used alternatingly, in Practical Project, can be designed to more than one or two according to inventory.
From the saline solution of a not good liquor liquid knockout drum rear pump 29 through after two not good liquor liquid/gas separators 35, saline solution is thoroughly separated with organic absorbent, isolated saline solution enters salt liquid storage tank 30, get to chemical fertilizer system 32 by saline solution rear pump 31 and prepare ammonium sulfate, ammonium nitrate mixed fertilizer, and organic absorbent enters recovery absorbent storage tank 34, return tower pump 33 by absorbent and get in absorption tower 19.
Described accident prevention system comprises melt pit 17 and emergency storage tank 13, described tank used for storing ammonia 7, washings knockout drum 9, fresh water (FW) storage tank 11, absorption tower 19, one not good liquor liquid knockout drum 28, salt liquid storage tank 30, reclaiming absorbent storage tank 34 is all connected with described melt pit 17, in described melt pit 17, be also provided with melt pit mixer 16, described melt pit 17 is connected with described emergency storage tank 13, described melt pit 17 is communicated with described mixed liquor by sump pump 15, described mixed liquor is communicated with described emergency storage tank 13 by mixed liquor excavationg pump 21, described emergency storage tank 13 also returns to pump 14 by accident and is communicated with described mixed liquor.
The utility model is designed with a melt pit 17, and in the time that abnormal, overhaul of the equipments, parking maintenance appear in system, the material in each storage tank can flow in melt pit 17 by the blow-off pipe of bottom, overflow pipe.Get rid of after recovery normally until abnormal, by sump pump 15, material is returned in absorption tower 19, re-use.Pit stirrer 16 is installed on melt pit 17.
Break down and maybe need maintenance the mixed liquor of the inside need be discharged out when absorption tower 19, got in emergency storage tank 13 by mixed liquor excavationg pump 20, tower 19 to be absorbed returns to pump 14 by emergency storage tank again after handling well and gets in absorption tower 19.
Described discharge flue 43 is provided with a downward crooked flue 42, described crooked flue 42 by fall shower pipe 41 be communicated with described melt pit 17.
Flue gas enters behind absorption tower 19, upwards rises, and successively through absorber portion, the demist section on absorption tower 19, last clean flue gas enters discharges flue 43 discharged to atmosphere.In the discharge flue 43 connecting at 19 tops, absorption tower, a downward crooked flue 42 is set, the steam Yin Wendu that carries secretly is reduced and condenses into after liquid state by falling shower pipe 41 and enter melt pit 17 (the recyclable organic absorbent of carrying secretly) in flue gas.
In system of the present utility model, relate to the place that interconnects of pipeline, be equipped with and control the one-way cock that pipeline is opened or closed.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (9)
1. an organic absorbent method flue gas desulfurization and denitrification demercuration system, comprise absorption tower (19), enter flue (2) and discharge flue (43), the described flue (2) that enters is communicated with middle and lower part, described absorption tower (19), bottom in described absorption tower (19) is provided with mixed liquor, the described level height of flue (2) and absorption tower (19) connectivity part that enters is higher than the level height of described mixed liquor liquid level, described discharge flue (43) is communicated with the top of described absorption tower (19), it is characterized in that, also comprise absorption system, demister system, oxidation neutralized system, liquid dust removing system, liquid liquid separation system, accident prevention system, described oxidation neutralized system is communicated with described mixed liquor, described demister system is communicated with the middle and upper part on described absorption tower (19) and is positioned at the top of described mixed liquor liquid level, mixed liquor described in described liquid dust removing system connectivity, described liquid liquid separation system is connected with described liquid dust removing system and is communicated to the middle part of described absorption tower (19), the bottom on described absorption tower (19), demister system, oxidation neutralized system, liquid dust removing system and liquid liquid separation system all with described accident prevention system connectivity.
2. organic absorbent method flue gas desulfurization and denitrification demercuration system according to claim 1, is characterized in that, described in enter and on flue (2), be connected with strong oxidizer admission passage (1).
3. according to organic absorbent method flue gas desulfurization and denitrification demercuration system described in claim 1 or 2, it is characterized in that, described absorption system comprises several absorbent recirculation pumps (21), the water inlet pipe of described absorbent recirculation pump (21) is communicated with described mixed liquor, the outlet pipe end of described absorbent recirculation pump (21) is provided with several spray heads that Open Side Down, and extend into inside, described absorption tower (19), the level height of the outlet pipe end of described absorbent recirculation pump (21) is higher than the level height of the described connectivity part that enters flue (2) and described absorption tower (19).
4. organic absorbent method flue gas desulfurization and denitrification demercuration system according to claim 3, it is characterized in that, described oxidation neutralized system comprises air hose (4), ammonia water pipe (5) and tank used for storing ammonia (7), on described air hose (4), be also connected with oxidation fan (6), the end of described air hose (4) extend in the mixed liquor of described absorption tower (19) inner bottom part, and be connected with several air spargers (18), described ammonia water pipe (5) is connected with described tank used for storing ammonia (7), described tank used for storing ammonia (7) is communicated with described mixed liquor by ammoniacal liquor supply pump (8).
5. organic absorbent method flue gas desulfurization and denitrification demercuration system according to claim 4, it is characterized in that, described demister system comprises washings knockout drum (9), technique water pipe (3), fresh water (FW) storage tank (11), rise gas cap dividing plate (38), demister (39) and packing layer (40), the described gas cap dividing plate (38) that rises, demister (39) and packing layer (40) are all positioned at described absorption tower (19), the described level height of gas cap dividing plate (38) that rises is higher than the level height of the outlet pipe of described absorbent recirculation pump (21), be provided with several demisters being arranged in parallel up and down (39) in the described top that rises gas cap dividing plate (38), the top of described demister (39) is provided with packing layer (40), above and below at described demister (40) and described packing layer (39) is equipped with except fog spray head, also be provided with except fog spray head in the described top that rises gas cap dividing plate (38), described technique water pipe (3) is connected with described fresh water (FW) storage tank (11), described fresh water (FW) storage tank (11) is communicated with respectively described except fog spray head by washings circulating pump (12), described fresh water (FW) storage tank (11) is also communicated with and is entered flue (2) by washings circulating pump (12), described gas cap dividing plate (38) bottom that rises is provided with the washings outlet of stretching out outside described absorption tower (19), described washings outlet is communicated with described washings knockout drum (9), described washings knockout drum (9) is communicated with respectively described fresh water (FW) storage tank (11) and described mixed liquor by washings knockout drum rear pump (10).
6. organic absorbent method flue gas desulfurization and denitrification demercuration system according to claim 5, it is characterized in that, described liquid dust removing system comprises slurry pool (23), solid-liquid separator (27) and filtrate receiver (37), described mixed liquor is communicated with described slurry pool (23) by mixed liquor excavationg pump (20), in described slurry pool (23), be provided with slurry pool mixer (22), described slurry pool (23) is also circumscribed with steam pipe (25), described slurry pool (23) is communicated with described solid-liquid separator (27) by Separation of Solid and Liquid feed pump (24), the isolated solid of described solid-liquid separator (27) forms filter cake (26), the isolated liquid of described solid-liquid separator (27) is sent in filtrate receiver (37), described filtrate receiver (37) is communicated with described liquid liquid separation system by filtrate rear pump (36).
7. organic absorbent method flue gas desulfurization and denitrification demercuration system according to claim 6, it is characterized in that, described liquid liquid separation system comprises a not good liquor liquid knockout drum (28), two not good liquor liquid/gas separators (35), salt liquid storage tank (30), reclaim absorbent storage tank (34) and chemical fertilizer system (32), described filtrate receiver (37) is communicated with a described not good liquor liquid knockout drum (28) by filtrate rear pump (36), a described not good liquor liquid knockout drum (28) is communicated with described two not good liquor liquid/gas separators (35) and described absorption tower (19) by a not good liquor liquid knockout drum rear pump (27), described two not good liquor liquid/gas separators (35) are communicated with respectively described salt liquid storage tank (30) and reclaim absorbent storage tank (34), described salt liquid storage tank (30) is communicated with chemical fertilizer system (32) by saline solution rear pump (31), described recovery absorbent storage tank (34) returns tower pump (33) by absorbent and is communicated with described absorption tower (19), its connectivity part level height is positioned between described mixed liquor liquid level and the outlet pipe end of described absorbent recirculation pump (21).
8. organic absorbent method flue gas desulfurization and denitrification demercuration system according to claim 7, it is characterized in that, described accident prevention system comprises melt pit (17) and emergency storage tank (13), described tank used for storing ammonia (7), washings knockout drum (9), fresh water (FW) storage tank (11), the bottom on absorption tower (19), one not good liquor liquid knockout drum (28), salt liquid storage tank (30), reclaiming absorbent storage tank (34) is all connected with described melt pit (17), in described melt pit (17), be also provided with melt pit mixer (16), described melt pit (17) is connected with described emergency storage tank (13), described melt pit (17) is communicated with described mixed liquor by sump pump (15), described mixed liquor is communicated with described emergency storage tank (13) by mixed liquor excavationg pump (21), described emergency storage tank (13) also returns to pump (14) by accident and is communicated with described mixed liquor.
9. organic absorbent method flue gas desulfurization and denitrification demercuration system according to claim 8, it is characterized in that, described discharge flue (43) is provided with a downward crooked flue (42), and described crooked flue (42) passes through shower pipe (41) and is communicated with described melt pit (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420290999.3U CN203853003U (en) | 2014-06-03 | 2014-06-03 | Smoke desulfurization, denitration and demercuration system with organic absorbent method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420290999.3U CN203853003U (en) | 2014-06-03 | 2014-06-03 | Smoke desulfurization, denitration and demercuration system with organic absorbent method |
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| Publication Number | Publication Date |
|---|---|
| CN203853003U true CN203853003U (en) | 2014-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420290999.3U Withdrawn - After Issue CN203853003U (en) | 2014-06-03 | 2014-06-03 | Smoke desulfurization, denitration and demercuration system with organic absorbent method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104056535A (en) * | 2014-06-03 | 2014-09-24 | 陈浩 | Organic absorbent process flue gas desulfurization, denitrification and demercuration system |
| CN107774082A (en) * | 2016-08-31 | 2018-03-09 | 中国石油化工股份有限公司 | A kind of method and device of flue gas desulfurization |
| CN107952352A (en) * | 2017-12-26 | 2018-04-24 | 亚太环保股份有限公司 | A kind of catalytic cracking flue gas desulphurization denitration dedusting acid-mist-removing integrated apparatus and method |
-
2014
- 2014-06-03 CN CN201420290999.3U patent/CN203853003U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104056535A (en) * | 2014-06-03 | 2014-09-24 | 陈浩 | Organic absorbent process flue gas desulfurization, denitrification and demercuration system |
| CN104056535B (en) * | 2014-06-03 | 2016-10-05 | 陈浩 | A kind of organic absorbent method flue gas desulfurization and denitrification demercuration system |
| CN107774082A (en) * | 2016-08-31 | 2018-03-09 | 中国石油化工股份有限公司 | A kind of method and device of flue gas desulfurization |
| CN107952352A (en) * | 2017-12-26 | 2018-04-24 | 亚太环保股份有限公司 | A kind of catalytic cracking flue gas desulphurization denitration dedusting acid-mist-removing integrated apparatus and method |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20141001 Effective date of abandoning: 20161005 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |