CN202725025U - Waste gas purifying treatment device - Google Patents
Waste gas purifying treatment device Download PDFInfo
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- CN202725025U CN202725025U CN2011202209333U CN201120220933U CN202725025U CN 202725025 U CN202725025 U CN 202725025U CN 2011202209333 U CN2011202209333 U CN 2011202209333U CN 201120220933 U CN201120220933 U CN 201120220933U CN 202725025 U CN202725025 U CN 202725025U
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- sorbent
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The utility model belongs to the field of waste gas treatment, and discloses a waste gas purifying treatment device which comprises a reactor, a waste gas circulating system, a catalysis adsorbent system and a dust-removing system. The waste gas circulating system, the catalysis adsorbent system and the dust-removing system are respectively connected with the reactor. The waste gas circulating system guides flue waste gas which needs to be purified to the reactor. The catalysis adsorbent system guides catalysis adsorbent which is needed by purifying treatment of the flue waste gas to the reactor. The dust-removing system removes dust from reaction resultant which is exhausted by the reactor. According to the waste gas purifying treatment device, mixtures of gaseous ammonia-hydrate complexes and gaseous oxygen-rich materials are used as the catalysis adsorbent, and gaseous pollutants such as nitrogen, sulfur, carbon in the flue waste gas can be removed at the same time. The waste gas purifying treatment device is simple in system structure, small in specification, low in cost and easy to operate. Water is of no need in the whole process, resources are saved, and secondary pollution is avoided. Solid products generated by a purifying reaction are solid salt, through purifying treatment, chemical materials with high added value can be obtained, and resource utilization is achieved.
Description
Technical field
The utility model relates to the waste gas pollution control and treatment technical field, particularly relates to a kind of exhaust gas purification and treatment device.
Background technology
The waste gas of industrial waste gas, particularly combustion of fossil fuel, discharging be the main source of atmosphere pollution.Contain a large amount of oxysulfide (SO in the flue gas that combustion of fossil fuel produces
x: SO
3, SO
2), nitrogen oxide (NO
x: NO, NO
2Deng), carbon dioxide (CO
2) and hydrogen fluoride (HF), the Air Pollutant Discharges such as hydrogen chloride (HCl).The discharging of flue gas has destroyed the environment of the earth, causes a series of environment, ecology and social concern.Such as the SO that discharges in to atmosphere
2And NO
xCause the serious Acid Rain Pollution of atmosphere, thus cause can building damage, and directly affect human health; Nitrogen oxide causes Atmospheric Photochemical Smog, CO
2The main arch-criminal who causes the atmosphere greenhouse effects.
For better protection of the environment, the present industrial improvement method that many flue gas waste gas are arranged.Traditionally, mostly be sulfur dioxide (SO aspect the purification of flue gas pollutant
2) and separately improvement of nitrogen oxide.No matter remove which kind of pollutant, applied flue gases purification mainly contains dry method and wet method.
Dry desulfurization is that use solid absorbent, adsorbent or catalyst are removed the SO in the waste gas
2, method commonly used has active carbon adsorption, molecular sieve adsorption, oxidizing process and metal oxide absorption process etc.The advantage of dry desulfurization is the discharge that does not have waste water, spent acid in administering, and has reduced secondary pollution; Shortcoming is that desulfuration efficiency is low, and equipment is huge, and one-time investment is high, and operating cost is high.
Wet desulphurization adopts liquid-absorbant washing flue gas to remove SO
2, method commonly used has limestone/gypsum method, soda absorption process, ammonia absorption process, aluminium method, catalytic oxidation and catalytic reduction method etc.The Technical Introduction of Desulfurized is present most widely used general, SO that technology is the most ripe in the world
2Remove technology.This technique has the desulfuration efficiency height, operational reliability is high, the absorbent utilization rate is high, can adapt to large capacity unit and high concentration SO
2Flue gas condition, strong to coal adaptability, absorbent is cheap and byproduct has the characteristics such as commercial value of comprehensive utilization, its major defect is that the capital expenditure expense is high, floor space is large, water consumption is large, the waste water and dregs amount is large and produces large quantity of exhaust gas--carbon dioxide--greenhouse gases, cause serious secondary pollution (comprising gas, water and slag), bring the problems such as new environment, ecology.Desulfuration byproduct is hygrometric state, be difficult to process, and a large amount of waste water that desulfurization produces need to could discharge through processing.
It is many that the coal-fired flue-gas nitrogen oxide is administered the technology kind, have liquid absorption method, microorganism absorption process, non-selective catalytic reduction, red-hot charcoal reduction method, catalytic decomposition, liquid-film method, SNRB technique denitration technology, reaction type oxidation to absorb denitration technology etc., but only selective catalytic reduction method (SCR) obtain to use comparatively widely.Selective catalytic reduction refers under the effect of catalyst, with NH
3As reducing agent, selectively with flue gas in NO
xThe N of reaction and generation nontoxic pollution-free
2And H
2O.Be in 1 the situation, can obtain the NO up to 80-90% in 200-400 ℃ temperature range and in NH3 and NO stoichiometric proportion
xRemoval efficiency.But exist catalyst easily to poison or blocked and cause clearance to descend, the equipment operation is unstable, and consumes a large amount of catalyst, and operating cost is high, and equipment investment is large, can not adapt to large capacity unit and higher concentration NO
xThe shortcomings such as flue gas condition.
Current, the flue gases purification of industrial mainstream applications is wet desulphurization, and dry method is except nitre.But some combined desulfurization and denitrification process are also rising, such as active carbon adsorption, and plasma method, electronic beam method, corona discharge pulse plasma method, CuO method, SNAP method etc.Remove simultaneously SO
x/ NO
xTechnique all be to seek separately to administer than technique that higher business efficiency is arranged is target.At present, industrialization SO
2/ NO
xThe associating removing process is to adopt high-performance lime/lime stone flue gas desulfurization FGD system to remove SO
2With remove NO with catalysis method SCR technique
xThis process integration can remove sulfur dioxide more than 90% and the nitrogen oxide of 30-80%.The FGD system adopts wet process, and the SCR system belongs to dry process, and FGD and SCR process using different technologies work alone separately.No matter its advantage is porch SO
2/ NO
xConcentration ratio what are, it can both reach desirable separately removal efficiency, but it has also inherited dry method and wet method shortcoming separately: equipment investment is large, operating cost is high, and water consumption is large, and must carry out the advanced treating of draining, secondary pollution is serious, catalyst poisoning or active significantly reduction cause clearance to reduce, and can not adapt to large capacity unit.In addition, at present all flue gas purifying method all less than the function of considering except carbon emission reduction.
The utility model content
The technical problem that (one) will solve
The technical problems to be solved in the utility model is the multiple gases pollutant of how removing efficiently in the flue gas, and cost is low, does not produce secondary pollution.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of exhaust gas purification and treatment device, it comprises: reactor, the scheme for exhaust gas circulation system that is connected with described reactor respectively, catalyst-sorbent system and dust pelletizing system, described scheme for exhaust gas circulation system will need the stack gases of purified treatment to pass into described reactor, the described catalyst-sorbent system catalyst-sorbent that the stack gases purified treatment is required passes into described reactor, and the reaction product that described dust pelletizing system is discharged described reactor carries out dust removal process.
Wherein, also comprise: recycling system, link to each other with described dust pelletizing system, the solid matter that described dust pelletizing system sub-argument is gone out carries out resource reutilization.
Wherein, also comprise: heat-exchange system links to each other with dust pelletizing system with described scheme for exhaust gas circulation system, reactor, catalyst-sorbent system respectively; Stack gases in the described scheme for exhaust gas circulation system imports described reactor by the first pipeline in the described heat-exchange system, the intrasystem catalyst-sorbent of described catalyst-sorbent imports described reactor by the second pipe in the described heat-exchange system, and the tail gas after processing in the described dust pelletizing system enters in the atmosphere by the 3rd pipeline in the described heat-exchange system.
Wherein, described dust pelletizing system comprises the deduster that links to each other with described reactor and the solid collector that links to each other with described deduster.
Wherein, the intrasystem catalyst-sorbent of described catalyst-sorbent is the mixture of gaseous ammonia-aquo complex and gaseous state oxygen enrichment material.
Wherein, the connecting pipe of described catalyst-sorbent system and described reactor is set to some, and catalyst-sorbent is passed into described reactor stage by stage.
Wherein, described the first pipeline, second pipe and the 3rd pipeline are not connected.
Wherein, described deduster output is connected with connecting pipe between described heat-exchange system and the reactor; Another output of described deduster connects demister, the output of demister respectively with described heat-exchange system in the 3rd pipeline and catalyst-sorbent system link to each other with connecting pipe between the reactor.
Wherein, also comprise monitoring system, link to each other with heat-exchange system with scheme for exhaust gas circulation system, reactor, catalyst-sorbent system, dust pelletizing system respectively, with the concentration parameter of pollutant in operating temperature, pressure and the stack gases of monitoring each system.
Wherein, be provided with the UV-irradiation system in the described reactor.
(3) beneficial effect
The exhaust gas purification and treatment device that technique scheme provides as catalyst-sorbent, can be removed the gaseous contaminants such as nitrogen in the stack gases, sulphur, carbon with the mixture of gaseous ammonia-aquo complex and gaseous state oxygen enrichment material simultaneously; System architecture is simple, and specification is little, and cost is low, easy operating; Whole process does not need water, economizes on resources, and can not produce secondary pollution; The solid product that purification produces is respectively solid salt, through purification process, obtains the industrial chemicals of high added value, realizes resource.
Description of drawings
Fig. 1 is the block diagram of the stack gases cleaning treatment system of the utility model embodiment.
Wherein, 1: the first pipeline; 2: second pipe; 3: the three pipelines; 4: the four pipelines; 5: the five pipelines; 6: the six pipelines; 10: reactor; 20: scheme for exhaust gas circulation system; 30: the catalyst-sorbent system; 40: heat-exchange system; 50: dust pelletizing system; 51: deduster; 52: solid collector; 53: demister.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
Present embodiment further describes the structure of exhaust gas purification and treatment device and uses this exhaust gas purification and treatment device to carry out the process that waste gas purification is processed take stack gases as example.
The structured flowchart of the exhaust gas purification and treatment device of the utility model embodiment as shown in Figure 1, it comprises reactor 10 at least, scheme for exhaust gas circulation system 20 and catalyst-sorbent system 30.Scheme for exhaust gas circulation system 20 has a pipeline that flue gas is transported to reactor 10 from scheme for exhaust gas circulation system 20 at least.
Catalyst-sorbent system 30 links to each other with reactor 10, and catalyst-sorbent enters reactor 10 through catalyst-sorbent system 30.Before catalyst-sorbent is added into reactor 10, through the gasification liquid catalyst is become gaseous catalyst, thereby make catalyst-sorbent can with flue gas in pollutant react in gaseous state homogeneous phase mode, reaction rate is able to significantly increase.
Because liquefied ammonia easily is vaporized, and gaseous ammonia can generate ammonia-aquo complex with steam, and fast chemical reaction can occur the acid contaminant in this complex compound and the waste gas, forms nontoxic compound.For example, gaseous ammonia-aquo complex can generate ammonium sulfate ((NH with the sulfur dioxide reaction
4)
2SO
4), form ammonium nitrate (NH with the nitrogen dioxide reaction
4NO
3), and generate ammonium carbonate ((NH with carbon dioxide reaction
4)
2CO
3).In reactor, because catalyst-sorbent in flue gas a series of reaction can occur, many other compounds also may form, and reactor 10 interior more reaction details will be introduced in the back.
Gaseous ammonia-aquo complex not only can be removed pollutant harmful in the flue gas, such as oxysulfide (SO as catalyst-sorbent
x), nitrogen oxide (NO
x) and carbon dioxide (CO
2), but also in the reaction of ammonia and flue gas pollutant, formed nontoxic final products.Final product, ammonium salt as mentioned above can be used as industrial chemicals or chemical fertilizer raw material, thereby makes flue gas purification system can purify and reclaim pollutant in the flue gas, thereby reaches the purpose of flue gas resource.Should be pointed out that the pollutant in gas phase catalysis adsorbent and the flue gas passes through the catalytic oxidation process, photodissociation and the complicated fast chemical reactions such as chain reaction, and dust removal process are removed the pollutant in the flue gas effectively.In the related cleaning system of the utility model, do not need other extra resources, such as water, without any waste water or other secondary pollution deposits yields.Thereby cleaning system can fundamentally be removed the pollutant in flue gas expeditiously.
In the scheme of implementation of the present utility model, reactor 10 is venturi type Gas-phase reactor.The reactor 10 of venturi type design can make the pollutant in the flue gas fully mix with absorbent and contact, to improve to greatest extent reaction efficiency.Heat-exchange system 40 is that liquefied ammonia is being entered reactor 10 front preheating gasifications.
Heat-exchange system 40 is arranged between 20 outlets of the flue gas circulatory system and the reactor 10.In general, the flue gas initial temperature is between 120 to 160 ℃, and the thermal energy that heat-exchange system 40 can effectively use flue gas itself is gaseous ammonia not having under a large amount of extra energy or the power liquid ammonia gasification, makes flue gas significantly cool to the required temperature of reaction.
Heat-exchange system 40 mainly contains two groups of pipelines, and flue gas enters heat-exchange system 40 from the input of the first pipeline 1, and the flue gas after the cooling out enters reactor 10 from output.Liquid ammonia enters heat-exchange system 40 from the input of second pipe 2 through catalyst-sorbent system 30, the gas phase ammonia after the gasification from the output of second pipe 2 out, through the connecting pipe of heat-exchange system 40 with reactor 10, namely the 5th pipeline 4 enters reactor 10.The flue gas with higher temperature in the first pipeline 1 makes it to gasify as the liquefied ammonia in the heat exchange medium heating second pipe 2, thereby makes the pollutant in ammonia catalyst-sorbent and the flue gas can the quick catalysis adsorption reaction, so that flue gas is purified.
By heat-exchange system 40, liquefied ammonia absorbs the heat in the higher flue gas of temperature, thereby has effectively utilized the energy.Heat-exchange system 40 not only makes liquefied ammonia obtain gasification, and can make flue gas obtain cooling before entering reactor 10, makes it with amino catalyst-sorbent gas-gas homogeneous reaction to occur effectively.
Gaseous state catalyst-sorbent ammonia is divided into two or more stage manner and adds reactor 10, for this reason, connecting pipe the 4th pipeline between catalyst-sorbent system 30 and reactor 10 is provided with three the 6th pipelines 6, so that the gaseous state catalyst-sorbent is added in the reactor 10 stage by stage.For different main purification targets, there is specific reaction condition in each stage, and such as predetermined temperature, concentration and/or pressure are so that main specific reaction can further improve reaction speed and efficient.Single unit cleaning system before the contrast, the utility model can a plurality of contamination indexs of while high-efficient purification with same set of apparatus.
For example, the sulfur dioxide of the overwhelming majority can react with gaseous ammonia-aquo complex under the reaction condition of phase I, but also has the second stage that a small amount of sulfur dioxide may enter reactor 10.The design reaction condition of second stage is mainly for the mode of gaseous state catalyst-sorbent and nitrogen dioxide reaction.In the second stage of reactor 10, sulfur dioxide not only can continue and gaseous ammonia-aquo complex reaction, and the product generation coupled reaction that more can generate with the main reaction of second stage is so that sulfur dioxide is removed fully.Thus, cleaning system of the present utility model can purify two or more pollutions simultaneously effectively.Therefore, gaseous contaminant has gas-gas type to contact fully with gaseous ammonia-aquo complex in the reactor 10 of multisection type, so that the reaction between them fast, efficiently.
In the present embodiment, also have dust pelletizing system 50, its output with reactor 10 is connected.Dust pelletizing system 50 is the products for removing and collect the dust in the flue gas and producing from reactor 10 internal reactions.The ammonium salt that is included in the flue gas flying dust in the dust and forms by flue gas pollutant and catalyst-sorbent gas-phase reaction.Therefore, flue gas through and the reactor 10 of gaseous ammonia-aquo complex reaction after, dust pelletizing system 50 can be collected flyash in the flue gas and conversion product--the ammonium salt of flue gas pollutant, realizes gas cleaning.
Flue gas after the dedusting by the demister 53 that links to each other with deduster 51 with unreacted ammonia with purify after flue gas separate, the ammonia of separating is again delivered to reactor 10 and is reacted; Flue gas after the purification is discharged in the atmospheric environment after 40 heating reach predetermined temperature through the heat-exchange system group.
Venturi-type reactor 10, the solid ammonium salt compound particle collision that is conducive to soot dust granule and generates and gathering growth course, grit is brought up to predetermined size, it can be eliminated grit from flue gas effectively for 51 thereby make dedusting, and deduster 51 can be electrostatic precipitator or sack cleaner.
In the present embodiment, in reactor 10, be provided with the UV-irradiation system, to improve the conversion ratio of gas pollutant and catalyst-sorbent reaction.
The stack gases purifying processing device of present embodiment also comprises recycling system, links to each other with dust pelletizing system, and the solid matter that the dust pelletizing system sub-argument is gone out carries out resource reutilization, carries out purification process such as the ammonium salt that reaction is produced, as chemical fertilizer.
The stack gases purifying processing device of present embodiment also comprises monitoring system, it is connected with above-mentioned each system respectively, with the temperature of each test point flue gas in the monitoring device, pressure, the concentration of pollutant and the variation of other parameter, thus regulate, control whole device.Flue gas had 120 to 160 ℃ usually before entering heat-exchange system 40, reach 50 ℃ to 80 ℃ through temperature behind the heat-exchange system 40 and before entering reactor 10, behind reactor 10, dust pelletizing system 50, heat-exchange system 40, end temperature is between 25 ℃ to 50 ℃, that is, the flue gas after the purification is discharged in the air in the time of about 25 ℃ to 50 ℃.
The automatically controlled catalyst-sorbent of monitoring system system 30, catalyst-sorbent system 30 can add catalyst-sorbent in the heat-exchange system 40 according to concentration, temperature, pressure and other parameters of the flue gas pollutant that enters reactor 10 automatically, and by the measuring system of monitoring system catalyst-sorbent is quantitatively added reactor 10, thereby form the adsorbent robot control system(RCS) of a self-control.Therefore, monitoring system can the collection and purification system in the various parameters of any measurement point, such as the concentration of various pollutants and the concentration of ammonia in temperature, pressure and the flue gas of flue gas.
Generally speaking, flue gas contains 50% nitrogen, 8% oxygen, and 20% carbon dioxide, 9% water, and a small amount of other pollutants, such as sulfur dioxide, nitrogen oxide and flyash.In theory, water (H
2O) can with sulfur dioxide, react between nitrogen dioxide and the carbon dioxide, but the reaction very slow, can not directly use in the industrial production.But behind the adding catalyst-sorbent, such as vapor phase ammonia-aquo complex (NH
3H
2O) so that sulfur dioxide, nitrogen dioxide and carbon dioxide can with ammoniacal liquor complex compound generation fast reaction, thereby the pollutants such as oxysulfide, nitrogen oxide and carbon dioxide in the flue gas are removed.
Based on above-mentioned exhaust gas purification and treatment device, can utilize the agent of gaseous state oxygen enrichment catalytic absorption to pass in the waste gas, by the agent of gaseous state oxygen enrichment catalytic absorption the sour gas pollutant in the waste gas is converted into solid product, the sour gas pollutant can be SO
x, NO
x, CO
2, HF, HCl, HNO
3, H
2S, H
2SO
4Deng; Then, solid product is carried out dust removal process together with original solid matter in the waste gas, separated from the gas, finish waste gas purification; Can also further the solid matter that obtains separated from the gas be carried out purification process, obtain industrial chemicals, realize the exhaust-gas treatment resource, the solid product that generates when reaction is ammonium salt, such as ammonium carbonate, carbonic hydroammonium, ammonium nitrate, ammonium sulfate, during ammonium hydrogen sulfate, through after the purification process, become the industrial chemicals of high value, or chemical fertilizer raw material; The solid product that generates when reaction is the carbon ammonium, such as ammonium carbonate, during carbonic hydroammonium, is used for industrial fossil fuel contamination source CO
2Capture.
In order to remove simultaneously the multiple gaseous contaminant in the waste gas, the mixture of the preferred gaseous ammonia-aquo complex of present embodiment and gaseous state oxygen enrichment material is as the agent of gaseous state oxygen enrichment catalytic absorption, the volume ratio of gaseous state oxygen enrichment material and gaseous ammonia-aquo complex is between 0-100, can be by liquefied ammonia be formed ammonia through heating and gasifying, and add steam and gaseous state oxygen enrichment material and make this catalyst-sorbent, wherein, the volume ratio of steam and ammonia is between 0-100, also between 0-100, gaseous state oxygen enrichment material can be oxygen to the volume ratio of gaseous state oxygen enrichment material and ammonia, or air, or oxygen-enriched air, or gaseous state hydrogen peroxide, or ozone.Pass into the temperature of the gaseous state oxygen enrichment catalytic absorption agent in the waste gas between-30 ℃～140 ℃, wherein, it is identical or different that minute different phase passes into the temperature of the gaseous state oxygen enrichment catalytic absorption agent in the waste gas.In order to improve the conversion ratio of the catalytic absorption agent of gaseous state oxygen enrichment and gas pollutant reaction, in its course of reaction, irradiating ultraviolet light.
The below is take several main sour gas pollutants as example, describes the reaction of itself and gaseous state oxygen enrichment catalyst-sorbent.
Nitrogen oxide in the flue gas is removed by a series of denitrification process.Nitric oxide in the flue gas (NO) is at first oxidized, forms nitrogen dioxide.Nitrogen dioxide and ammoniacal liquor complex compound (NH
3-H
2O) redox reaction and follow the homogeneous nucleation reaction occuring, forms solid phase ammonium nitrate (NH
4NO
3).The catalytic reaction molecular formula of nitrogen oxide and ammonia-aquo complex is as follows:
2NO+O
2→2NO
2
2NO
2+NH
3-H
2O→NH
4NO
3
The removal of sulfureous in flue gas oxide is the serial chemical process of a complexity, mainly comprises the series reaction such as acid-base reaction, oxidation reaction, radical reaction, chain reaction.
Acid-base reaction: sulfur dioxide and NH
3-H
2The reaction of O complex compound generates solid-state ammonium bisulfite (NH
3HSO
3) and ammonium sulfite (NH
4)
2SO
3
NH
3-H
2O (gas)+SO
2(gas) → NH
3HSO
3
2NH
3-H
2O (gas)+SO
2(gas) → (NH
4)
2SO
3
Oxidation reaction: the ammonium bisulfite (NH of generation
3HSO
3) and ammonium sulfite (NH
4)
2SO
3By generating ammonium hydrogen sulfate (NH via the oxygen enrichment substance oxidation
3HSO
4) and ammonium sulfate (NH
4)
2SO
4
NH
3HSO
3+O→NH
3HSO
4
NH
3HSO
4+NH
3→(NH
4)
2SO
4
Therefore, by acid-base reaction, oxidation reaction, the series reaction such as radical reaction and chain reaction, the sulfureous in flue gas oxide can both remove in the reactor 10 afterwards.
Decarbonizing process: carbon dioxide in flue gas content is higher, CO
2Not only do not react with vaporous water, also difficult and aqueous water reaction.But in reactor 10, carbon dioxide and NH
3-H
2After the collision of O complex compound, react, generate solid-state carbonic hydroammonium and ammonium carbonate compound, to eliminate oxycarbide.Reaction equation is as follows:
CO
2+NH
3-H
2O→NH
3HCO
3
NH
3HCO
3+NH
3→(NH
4)
2CO
3
Based on above-mentioned reaction, stack gases purifying treatment method provided by the utility model has comprised dust pelletizing system 50, makes dust, the solid product that comprises flyash and produce from reactor 10, can be removed through dust arrester 51 via flue gas, further purifying smoke.Through the dust that dust arrester 51 is removed, collect through collector 52, make the solid ammonium salt compound and other solid particles that produce in the reactor 10 can access further use, such as industrial chemicals, or chemical fertilizer raw material.
The method adopts the multistage mode to add catalyst-sorbent in reactor 10, makes each stage for the objectives in the flue gas pollutant, remove to greatest extent pollutant.Therefore, the method can make flue gas pass through multiple pollutant in same 10 while of the reactor purifying smoke, the not repeated construction or buy the needs of other equipment or system in order to remove that flue gas is not planted pollutant, it is minimum that thereby the cost that makes purification facility or equipment drops to, simultaneously, build required floor space for cleaning system and also reduce to minimum.
Behind flue gas ash removal with purify after flue gas emptying before, in the system unnecessary ammonia with purify after flue gas need further separate.Isolated ammonia adds reactor 10 recycling again through scheme for exhaust gas circulation system, and the flue gas behind the purifying is directed into heat-exchange system 40 and is heated to after the predetermined temperature emptying.
The monitoring system that provides in above-described embodiment can detect the temperature of each test point in this cleaning system, and pressure reaches the pollutant levels in the flue gas, can further strengthen removal efficient and the safety in production situation of supervisory systems.Monitoring system also is connected with catalyst-sorbent system 30, can automatically control thus catalyst-sorbent adds reactor 10 through heat-exchange system group 40 speed and amount.
By above-described embodiment as can be known, stack gases purifying processing device of the present utility model and method have following advantage at least.
1. do not need the adding of outside additional energy source.Heat-exchange system utilize the heat energy of high-temperature flue gas itself gasify liquefied ammonia and and regulate the temperature that tail gas is discharged, thereby save the energy.
2. the gaseous state homogeneous reaction between gaseous ammonia-aquo complex and the flue gas pollutant has the fast efficient height with producing ammonium salt compound of reaction speed, so that this cleaning system can be removed pollutants different in the flue gas simultaneously expeditiously.Sulfur dioxide, the removal of pollutants rates such as nitrogen oxide all are higher than 98%, and the removal efficiency of carbon dioxide is up to 30%.Compared to existing method, the clearance of sulfur dioxide of flue gases, nitrogen oxide, carbon dioxide all obtains showing improving, and is as shown in table 1:
Table 1
3. the chemical catalysis adsorbent that mainly consumes of present embodiment is ammonia-aquo complex, abundant, the low price in ammonia source, thus reduce to greatest extent gas cleaning operating cost.
4. the reaction principle that adopts of present embodiment is advanced, so that needed equipment, such as reactor 10, catalyst-sorbent system 30, heat-exchange system 40, dust pelletizing system 50 etc., simple in structure, specification is little, and the less that takes up room makes installation and equipment cost reach minimum.
In addition, present embodiment has sulphur removal simultaneously, and denitration subtracts carbon and gathers dust etc. multi-functionally, has not only improved the purification efficiency of flue gas pollutant, also can reduce the required space of cleaning system.
5. present embodiment can be widely used in various industrial circles.For instance, this cleaning system can be applicable to various deleterious acidic gases, such as improvement and the cleaning system of hydrogen fluoride and hydrogen chloride, also can be used for the purified treatment of automobile exhaust gas.
6. present embodiment is pure gaseous state flue gas purifying method, and process water is zero, saves water resource.In decontamination process, there is not the refuse of waste water or other types to form, do not produce secondary pollution.
7. present embodiment does not have strong corrosive chemical to add or produces, so that the equipment of cleaning system has relatively long service life.Because what present embodiment adopted is gas-phase reaction; gaseous contaminant is changed into solid contaminant; and install contained deduster system and can effectively collect and remove such as flyash and other solid particle dusts; cleaning equipment is difficult for blocked, thereby has improved the stability of cleaning system operation and reduced the maintenance of equipment cost.
Present embodiment in purification process the ammonium salt compound that produces can further be used by separation and purification, as industrial chemicals, or chemical fertilizer raw material, thereby flue gas not only is purified, and realizes resource.
9. the solid product that produces in purification process of present embodiment is the carbon ammonium, such as ammonium carbonate, during carbonic hydroammonium, is used for industrial fossil fuel contamination source CO
2Capture.
The above only is preferred embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and replacement, these improvement and replacement also should be considered as protection domain of the present utility model.
Claims (10)
1. exhaust gas purification and treatment device, it is characterized in that, comprise: reactor (10), the scheme for exhaust gas circulation system (20) that is connected with described reactor (10) respectively, catalyst-sorbent system (30) and dust pelletizing system (50), described scheme for exhaust gas circulation system (20) will need the stack gases of purified treatment to pass into described reactor (10), described catalyst-sorbent system (30) catalyst-sorbent that the stack gases purified treatment is required passes into described reactor (10), and the reaction product that described dust pelletizing system (50) is discharged described reactor (10) carries out dust removal process.
2. exhaust gas purification and treatment device as claimed in claim 1 is characterized in that, also comprises: recycling system, link to each other with described dust pelletizing system, and the solid matter that described dust pelletizing system sub-argument is gone out carries out resource reutilization.
3. exhaust gas purification and treatment device as claimed in claim 1, it is characterized in that, also comprise: heat-exchange system (40) links to each other with described scheme for exhaust gas circulation system (20), reactor (10), catalyst-sorbent system (30) and dust pelletizing system (50) respectively; Stack gases in the described scheme for exhaust gas circulation system (20) imports described reactor (10) by the first pipeline (1) in the described heat-exchange system (40), catalyst-sorbent in the described catalyst-sorbent system (30) imports described reactor (10) by the second pipe (2) in the described heat-exchange system (40), and the tail gas after processing in the described dust pelletizing system (50) enters in the atmosphere by the 3rd pipeline (3) in the described heat-exchange system (40).
4. exhaust gas purification and treatment device as claimed in claim 1, it is characterized in that described dust pelletizing system (50) comprises the deduster (51) that links to each other with described reactor (10) and the solid collector (52) that links to each other with described deduster (51).
5. exhaust gas purification and treatment device as claimed in claim 3 is characterized in that, the catalyst-sorbent in the described catalyst-sorbent system (30) is the mixture of gaseous ammonia-aquo complex and gaseous state oxygen enrichment material.
6. exhaust gas purification and treatment device as claimed in claim 3, it is characterized in that, described catalyst-sorbent system (30) is set to some with the connecting pipe of described reactor (10), and catalyst-sorbent is passed into described reactor (10) stage by stage.
7. exhaust gas purification and treatment device as claimed in claim 3 is characterized in that, described the first pipeline (1), second pipe (2) and the 3rd pipeline (3) are not connected.
8. exhaust gas purification and treatment device as claimed in claim 4 is characterized in that, output of described deduster (51) is connected with the connecting pipe between described heat-exchange system (40) and the reactor (10); Another output of described deduster (51) connects demister (53), the output of demister (53) respectively with described heat-exchange system (40) in the 3rd pipeline (3) and catalyst-sorbent system (30) link to each other with connecting pipe between the reactor (10).
9. such as each described exhaust gas purification and treatment device among the claim 1-8, it is characterized in that, also comprise monitoring system, link to each other with scheme for exhaust gas circulation system (20), reactor (10), catalyst-sorbent system (30), dust pelletizing system (50) and heat-exchange system (40) respectively, with the concentration parameter of pollutant in operating temperature, pressure and the stack gases of monitoring each system.
10. exhaust gas purification and treatment device as claimed in claim 8 is characterized in that, described reactor is provided with the UV-irradiation system in (10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/803,535 | 2010-06-28 | ||
| US12/803,535 US8110164B2 (en) | 2010-06-23 | 2010-06-28 | Flue-Gas purification and reclamation system and method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN202725025U true CN202725025U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202209333U Expired - Fee Related CN202725025U (en) | 2010-06-28 | 2011-06-27 | Waste gas purifying treatment device |
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| CN (1) | CN202725025U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104959032A (en) * | 2015-06-16 | 2015-10-07 | 绍兴博易环保科技有限公司 | Hydrogen sulfide deodorization device for tail gas of synthesis gas |
| CN108654357A (en) * | 2018-07-03 | 2018-10-16 | 甘肃省科学院生物研究所 | A kind of biological treatment device for the three wastes that burn and artificial microecosystem |
-
2011
- 2011-06-27 CN CN2011202209333U patent/CN202725025U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104959032A (en) * | 2015-06-16 | 2015-10-07 | 绍兴博易环保科技有限公司 | Hydrogen sulfide deodorization device for tail gas of synthesis gas |
| CN104959032B (en) * | 2015-06-16 | 2017-03-29 | 杭州博韵易环保科技有限公司 | The hydrogen sulfide odor removal of synthesis tail-gas |
| CN108654357A (en) * | 2018-07-03 | 2018-10-16 | 甘肃省科学院生物研究所 | A kind of biological treatment device for the three wastes that burn and artificial microecosystem |
| CN108654357B (en) * | 2018-07-03 | 2023-12-08 | 甘肃省科学院生物研究所 | Biological treatment device for burning three wastes and artificial micro-ecological system |
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Effective date of registration: 20170922 Address after: 100048, room 6, building 17, North Hospital (South Hospital), 408 South Bridge Road, Haidian District, Beijing Patentee after: Beijing Connaught Environmental Protection Technology Co., Ltd. Address before: 100037 Beijing city Haidian District Bai duizi No. 23 hospital 2-501 Patentee before: Zhang Baoquan |
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