CN203916428U - A kind of flue gas combined desulfurization nitre carbon device - Google Patents

A kind of flue gas combined desulfurization nitre carbon device Download PDF

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CN203916428U
CN203916428U CN201420205033.5U CN201420205033U CN203916428U CN 203916428 U CN203916428 U CN 203916428U CN 201420205033 U CN201420205033 U CN 201420205033U CN 203916428 U CN203916428 U CN 203916428U
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carbon
tower
flue gas
dioxide
pipeline
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樊东华
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樊东华
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Abstract

The utility model provides a kind of flue gas combined desulfurization nitre carbon device, comprise flue gas heat-exchange unit, pulsed corona reactor, spray absorber, ammonia vessel, tank, circulating slot, crystallization tank and decarbonization device, flue gas heat-exchange unit is connected with pulsed corona reactor by pipeline, pulsed corona reactor is connected with spray absorber side bottom by pipeline, spray-absorption top of tower is connected with decarbonization device by pipeline, decarbonization device is connected with flue gas heat-exchange unit, ammonia vessel is connected with circulating slot respectively with tank, circulating slot communicates with the middle part of spray absorber, by delivery pump, ammoniacal liquor is transported to the middle part of spray absorber, the bottom of spray absorber is provided with return and communicates with circulating slot, circulating slot is also provided with the pipeline communicating with crystallization tank, this device is not only realized the object of desulphurization denitration simultaneously, also can save operating cost, reduces cost of investment and reduce refuse to produce.

Description

A kind of flue gas combined desulfurization nitre carbon device
Technical field
The utility model relates to a kind of flue gas desulfurization nitre carbon device.
Background technology
Along with the industrialization paces of China are accelerated, atmosphere pollution is corresponding increasing the weight of also.Research shows, the carbon dioxide of combustion process discharge is the main matter that causes greenhouse effects, and the SO2 discharging, NOx and fly ash granule are again the main sources that causes atmosphere pollution.How eliminating these pollutions is problem demanding prompt solutions.At present flue gas desulfurization, denitration (nitrogen) decarbonization method are varied, but the flue gas that all lays particular emphasis on simple function processes, and lack the one-stop treatment system technology of efficient system.
Combined desulfurization and denitration technology is the developing direction of smoke gas treatment in recent years.And harmful SO2, NOx often exists in flue gas simultaneously, because de-SO2, de-two catalytic process of NOx influence each other, particularly, in de-NOx process, due to the existence of SO2, often make catalyst poisoning.Current fume desulfuring and denitrifying integrated technique is ripe not enough, and applicable industryization can't realize completely.
In China, the coal of 84% left and right is directly burnt, and has produced a large amount of SO2, NOx and flue dust, and these pollutants have had a strong impact on human body, the ecosystem and environment, thereby the control of SO2 and NOx pollution has been become to the cardinal task that is related to national economy.China just started strictly to limit the discharge of SO2 and NOx as far back as 04 year, most of industrial enterprise will be faced with tighten control SO2 and NOx emission problem.The reserved SCR denitrification apparatus of installing brings many troubles can to the design of each parts of boiler, and uses separately desulphurization denitration technology, and once investment and operating cost are high, and floor space is large.Therefore, research and development combined desulfurization and denitration technology just seems particularly important.
In global energy, most combustion of fossil fuel processes can be discharged sour gas such as containing SO2, nitrogen oxide (NOx) at present, and they are main components of atmosphere pollution, are also the main matter that forms acid rain and photochemical fog.At present effective and the most the most frequently used desulfurization denitration method is flue gas desulfurization and denitrification after burning.Coal-fired Power Plant in China desulfur technology is of a great variety, and representative have lime stone---gypsum, rotary spraying and drying method, simple and easy wet method, wet-type ammonia, an electronic beam method etc.And to denitration, the coal-burning power plant of China adopts low NOx combusting technology mostly, abroad application choice catalytic reduction (SCR) technology is relatively many.There are many problems in the technology that the desulphurization denitration adopting is at present processed separately, as lime stone---and gypsum desulfurization degree only has 90%, and a large amount of sulfate of generation are difficult to process; SCR method be take NH3 as reducing gases, has the problems such as transportation difficulty, secondary pollution and complex process.Therefore, how retaining the technology that even promotes the advantage of single desulfurization removing nitric technology and develop energy while desulphurization denitration is the focus that desulfurization and denitrification integral technology becomes Recent study.Desulfurization and denitrification integral technology is just being subject to the pay attention to day by day of various countries.
Integral process is incorporated in desulphurization denitration technology in same set of technological process and carries out, and not only realizes the object of desulphurization denitration simultaneously, also can save operating cost, reduces cost of investment and reduce refuse to produce.Up to now, reach the integrated technology of commercial Application scale and mainly contain carbon based material method, Ozonation, electron beam irradiation method, impulse electric corona method, metal oxide oxidation catalyst method etc.The method that these technology adopt is that the sulphur in gaseous contaminant and nitrogen are converted into compared with stable form through series of chemical, as sulfate and nitrate and then industrial utilization.And the novel associating flue gas desulfurization and denitrification decarbonization system design technology that this technology is introduced be take Pulse Corona Techology exactly as prerequisite, the high effective flue gas treatment technology obtaining after the brand-new system carrying out.
Flue gas desulfurization and denitrification integrated technique grows up on flue gas desulfurization technique basis.Compare with independent desulfurization or denitrating technique, in a system, the technique of desulfurization removing nitric has superiority simultaneously, can reduce system complexity, improves runnability and reduce operating cost.
Utility model content
In order to solve the above problem existing in background technology, the utility model provides a kind of flue gas combined desulfurization nitre carbon device, this device carries out desulfurization nitre carbon in a covering device, not only realize the object of desulphurization denitration simultaneously, also can save operating cost, reduce cost of investment and reduce refuse generation.Compare with independent desulfurization or denitrating technique, in a system, the technique of desulfurization removing nitric has superiority simultaneously, can reduce system complexity, improves runnability and reduce operating cost.
For achieving the above object, the utility model adopts following technical scheme:
A flue gas combined desulfurization nitre carbon device, comprises flue gas heat-exchange unit, pulsed corona reactor, spray absorber, ammonia vessel, tank, circulating slot, crystallization tank and decarbonization device, it is characterized in that,
Flue gas heat-exchange unit is connected with pulsed corona reactor by pipeline, pulsed corona reactor is connected with spray absorber side bottom by pipeline, spray-absorption top of tower is connected with decarbonization device by pipeline, decarbonization device is connected with flue gas heat-exchange unit, ammonia vessel is connected with circulating slot respectively with tank, circulating slot communicates with the middle part of spray absorber, by delivery pump, ammoniacal liquor is transported to the middle part of spray absorber, the bottom of spray absorber is provided with return and communicates with circulating slot, and circulating slot is also provided with the pipeline communicating with crystallization tank;
Described decarbonization device comprises direct contact cooling tower, carbon dioxide absorption tower, liquid storage groove, carbon-dioxide regenerating tower, deammoniation tower, ammonia regenerator and carbon dioxide compressor, directly contact cooling tower is connected with carbon dioxide absorption tower by pipeline, the top of carbon dioxide absorption tower is connected with deammoniation tower, deammoniation tower bottom is connected with ammonia regenerator bottom by cooler, ammonia regenerator top communicates with the upper lateral part of carbon dioxide absorption tower by pipeline, the bottom of carbon dioxide absorption tower is connected with liquid storage groove, liquid storage groove bottom is provided with pipe branch, one connects carbon dioxide absorption tower by pump, another is connected with carbon-dioxide regenerating tower top, carbon-dioxide regenerating tower top is connected with carbon dioxide compressor by cooler and drier, carbon-dioxide regenerating tower bottom is connected with carbon dioxide absorption tower by pump and cooler.
The beneficial effects of the utility model are:
(1) adopt impulse electric corona plasma technology, this technology is good to the adaptability of flue gas, goes for the flue gas of different component, and can realize maximization.This technology has the advantages that application is reasonable, stable lastingly, treatment effect is good.
(2) adopt ammonia process wet scrubbing to absorb the SO in flue gas 2and NO x, ammoniacal liquor is to SO 2and NO xcan reach very high absorptivity, especially at oxidizability (NO 2/ NO x) can reach very high NO while being 50%~60% xremoval efficiency; Product can obtain having the chemical fertilizer of economic benefit after further processing.
(3) adopt freezing ammonia process decarburization, total system absorbent is single, is convenient to operational management.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated
Fig. 1 is the structural representation of the utility model embodiment 1;
Fig. 2 is the structural representation of the decarbonization device in Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing explanation and the specific embodiment, the utility model is further described:
Embodiment 1
As shown in Figure 1, a kind of flue gas combined desulfurization nitre carbon device comprises flue gas heat-exchange unit GGH, pulsed corona reactor, spray absorber, ammonia vessel, tank, circulating slot, crystallization tank and decarbonization device, flue gas heat-exchange unit is connected with pulsed corona reactor by pipeline, pulsed corona reactor is connected with spray absorber side bottom by pipeline, spray-absorption top of tower is connected with decarbonization device by pipeline, decarbonization device is connected with flue gas heat-exchange unit, ammonia vessel is connected with circulating slot respectively with tank, circulating slot communicates with the middle part of spray absorber, by delivery pump, ammoniacal liquor is transported to the middle part of spray absorber, the bottom of spray absorber is provided with return and communicates with circulating slot, circulating slot is also provided with the pipeline communicating with crystallization tank.
As shown in Figure 2, described decarbonization device comprises, directly contact cooling tower DCC, carbon dioxide absorption tower liquid storage groove carbon-dioxide regenerating tower, deammoniation tower, ammonia regenerator and carbon dioxide compressor, directly contact cooling tower is connected with carbon dioxide absorption tower by pipeline, the top of carbon dioxide absorption tower is connected with deammoniation tower, deammoniation tower bottom is connected with ammonia regenerator bottom by cooler, in the side of ammonia regenerator top by pipeline and carbon dioxide absorption tower, do not communicate, the bottom of carbon dioxide absorption tower is connected with liquid storage groove, liquid storage groove bottom is provided with pipe branch, by pump, again send into carbon dioxide absorption tower for one, another enters with carbon-dioxide regenerating tower top and is connected, carbon-dioxide regenerating tower top is connected with carbon dioxide compressor by cooler and drier, carbon-dioxide regenerating tower bottom is connected with carbon dioxide absorption tower by pump and cooler.
The technique of this device desulfurization nitre carbon is:
Carry out the flue gas of Self-duster, after cooling tower DCC, first enter pulsed corona reactor, the SO in flue gas 2and NO xpartially oxidized; After this flue gas enters spray absorber, in absorption tower, with ammonia and circulation fluid, absorbs the SO in flue gas 2and NO xgenerate ammonium sulfite, ammonium nilrite and ammonium nitrate; Flue gas after desulphurization denitration enters demist section, makes containing water smoke amount, to be less than 75mg/m in flue gas after demist 3; Flue gas after demist enters decarbonization device; Absorption liquid after desulphurization denitration enters circulating slot, and most of liquid reenters absorption tower and flue gas haptoreaction through circulating pump, and a part of liquid is pumped into product through crystallization and generates workshop.
After flue gas desulfurization nitre, through direct contact radiator (DCC), its temperature is cooled to 25 ℃ of left and right, water at low temperature is sprayed from tower top, and flue gas enters at the bottom of by tower, contacts with water at low temperature, and flue gas is cooled, and the most of water in the smoke gas flow condensing.Condensation water collection is in the bottom of DCC, gets back to DCC top of tower after cooling by circulating pump.Because a small amount of moisture is carried under one's arms and loss by flue gas by evaporation, therefore in DCC, add water to make up the cleaning loss of this respect.Before entering absorption tower, the flue gas of discharging from DCC need be cooled to 7 ℃.
Ammonia solution absorbs CO 2: ammonia solution absorbs CO 2mainly generated carbonic hydroammonium.Cooled flue gas enters from carbon dioxide absorption tower bottom, and cooled ammonia solution and carbonic acid ammonia solution enter from tower top.The carbon dioxide absorption amount of absorption liquid (lean solution) is between 0.33 and 0.67.Lower lean solution load factor and the absorption efficiency of Geng Gao are important two factors that determine the absorption efficiency of absorption liquid.Yet, reduce carbon dioxide loaded amount in lean solution, can cause the ammonia equilibrium partial pressure in gas to increase, thereby increase the volatilization of ammonia in absorption liquid.It is essential, by condenser, absorption liquid is carried out coolingly, control temperature and be no more than 10 ℃.In absorption tower refrigeration duty, have two sources: carbon dioxide is exothermic reaction with reacting of ammonia, therefore, reaction liberated heat need to be transferred, so that a low temperature absorption environment to be provided; Carbonic hydroammonium crystalline deposit be an exothermic reaction, liberated heat also needs to be transferred.
Through CO 2after the absorption on absorption tower, rich solution is discharged by bottom, absorption tower, and the flue gas after purification is escaped and enter the ammonia of deammoniation tower wash-out volatilization by top.Rich solution is delivered to a heat exchanger under 30atm by delivery pump.Slough the ammonia in flue gas: the ammonia in flue gas gas concentration of discharging from top, absorption tower is 500~3000ppmv, therefore cannot directly be thrown in atmosphere.The volatilization of ammonia simultaneously also increases cost.Therefore after absorption tower, need to increase a deammoniation tower.
Carbon dioxide desorb: carbon dioxide absorbent solution (rich solution) is sent in reservoir by bottom, absorption tower, then by being pumped into intersection heat exchanger.In intersection heat exchanger, rich solution is by desorb CO from regenerator 2rear solution (lean solution) heating.In some cases, be not that all solid ammonium bicarbonate are all being intersected heat exchanger dissolving.In this case, rich solution can be sent to another heat exchanger, will after all rich solution dissolution of solids, send into regenerator.
Rich solution has been entered in regenerator by tower top, flows from top to bottom, and the steam heated by reboiler, causes CO 2disengage.The CO of regeneration 2absorption liquid loops back the top on absorption tower after cooler is cooled to below 10 ℃.High CO 2the flue gas of concentration enters compressor and processes after dehydration.Step before this, may need to have a water scrubber to remove the ammonia in flue gas.Carbon dioxide compression: from regenerator gas out, pressure is 30atm, then compresses with secondary or three grades of compressor reducers.
It will be recognized by those skilled in the art, do not departing under the prerequisite of protection scope of the present invention, can carry out various modifications, variation and combination to above-mentioned embodiment, and think that this modification, variation and combination are within the scope of originality thought.

Claims (1)

1. a flue gas combined desulfurization nitre carbon device, comprises flue gas heat-exchange unit, pulsed corona reactor, spray absorber, ammonia vessel, tank, circulating slot, crystallization tank and decarbonization device, it is characterized in that,
Flue gas heat-exchange unit is connected with pulsed corona reactor by pipeline, pulsed corona reactor is connected with spray absorber side bottom by pipeline, spray-absorption top of tower is connected with decarbonization device by pipeline, decarbonization device is connected with flue gas heat-exchange unit, ammonia vessel is connected with circulating slot respectively with tank, circulating slot communicates with the middle part of spray absorber, by delivery pump, ammoniacal liquor is transported to the middle part of spray absorber, the bottom of spray absorber is provided with return and communicates with circulating slot, and circulating slot is also provided with the pipeline communicating with crystallization tank;
Described decarbonization device comprises direct contact cooling tower, carbon dioxide absorption tower, liquid storage groove, carbon-dioxide regenerating tower, deammoniation tower, ammonia regenerator and carbon dioxide compressor, directly contact cooling tower is connected with carbon dioxide absorption tower by pipeline, the top of carbon dioxide absorption tower is connected with deammoniation tower, deammoniation tower bottom is connected with ammonia regenerator bottom by cooler, ammonia regenerator top communicates with the upper lateral part of carbon dioxide absorption tower by pipeline, the bottom of carbon dioxide absorption tower is connected with liquid storage groove, liquid storage groove bottom is provided with pipe branch, one connects carbon dioxide absorption tower by pump, another is connected with carbon-dioxide regenerating tower top, carbon-dioxide regenerating tower top is connected with carbon dioxide compressor by cooler and drier, carbon-dioxide regenerating tower bottom is connected with carbon dioxide absorption tower by pump and cooler.
CN201420205033.5U 2014-04-25 2014-04-25 A kind of flue gas combined desulfurization nitre carbon device Expired - Fee Related CN203916428U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104437040A (en) * 2014-12-16 2015-03-25 江苏淞瀚新能源有限公司 Nitric oxide removing device and method based on delectric barrier discharge reactor
CN111514694A (en) * 2020-04-29 2020-08-11 中国建材国际工程集团有限公司 Glass flue gas recovery method
CN113082963A (en) * 2021-04-21 2021-07-09 江苏联慧资源环境科技有限公司 Clear liquid circulation magnesium method flue gas desulfurization process and device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104437040A (en) * 2014-12-16 2015-03-25 江苏淞瀚新能源有限公司 Nitric oxide removing device and method based on delectric barrier discharge reactor
CN111514694A (en) * 2020-04-29 2020-08-11 中国建材国际工程集团有限公司 Glass flue gas recovery method
CN113082963A (en) * 2021-04-21 2021-07-09 江苏联慧资源环境科技有限公司 Clear liquid circulation magnesium method flue gas desulfurization process and device
CN113082963B (en) * 2021-04-21 2021-12-31 江苏联慧资源环境科技有限公司 Clear liquid circulation magnesium method flue gas desulfurization process and device

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