CN105435600B - A kind of purification system and purification method of polluted gas - Google Patents
A kind of purification system and purification method of polluted gas Download PDFInfo
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- CN105435600B CN105435600B CN201510945916.9A CN201510945916A CN105435600B CN 105435600 B CN105435600 B CN 105435600B CN 201510945916 A CN201510945916 A CN 201510945916A CN 105435600 B CN105435600 B CN 105435600B
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- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/34—Chemical or biological purification of waste gases
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Abstract
The present invention provides a kind of purification system of polluted gas and purification methods, more particularly to containing H2The sulphur compounds such as S, NH3, the gas of the harmful components such as amines and VOCs such as trimethylamine purification system and purification method.The purification system of polluted gas of the present invention includes burning chemistry chains reactor, adsorption tower, gas pipeline, pressure gauge, pressure-regulating valve, blower, heater, motor-driven valve and triple valve, it is filled with oxygen carrier in the burning chemistry chains reactor, is filled with adsorbent in the adsorption tower.The purification method of polluted gas of the present invention includes the processes such as absorption, heating, desorption, reduction and oxidation.The purification system of polluted gas of the present invention organically combines the principle of temp.-changing adsorption with the principle of burning chemistry chains, and is applied to the processing of above-mentioned polluted gas, realizes desulfurization, the NH of the sulphur compound of high efficiency low energy consumption3Denitrogenation and VOC with aminesDecomposition.
Description
Technical field
The present invention relates to a kind of gas purge systems, more particularly to a kind of that temp.-changing adsorption principle and burning chemistry chains is former
Manage the purification system and method for the polluted gas combined.
Background technique
Refuse landfill, chemical plant, the places such as coating factory generally require that corresponding gas cleaning plant is arranged, with processing
What it was generated contains H2The sulphur compounds such as S, NH3And the amines such as trimethylamine, butanediamine foul gas or contain triphen, formaldehyde
The exhaust gas of equal VOCs.In addition, the unstripped gas such as rubbish landfill gas, mine gas, coke-stove gas, it is also desirable to the corresponding pre- place of purification
Reason technology, to remove H therein2S、NH3, the harmful components such as naphthalene.
Currently, the gas purification technique being most widely used is temp.-change adsorptive process and temp.-changing adsorption-Production by Catalytic Combustion Process.Alternating temperature
Absorption method needs to carry out desorption and regeneration, the H for being desorbed out after adsorbent adsorption saturation2S、NH3Etc. secondary dirt can be caused to environment
Dye, thus still need to harmless treatment.And when being used for raw material gas purifying, a part of purification gas is usually used as desorption gas
Body, so that causing the yield of purification gas reduces.Temp.-changing adsorption-Production by Catalytic Combustion Process using hot-air or vapor to adsorption tower into
Row desorption and regeneration, desorption gas import catalytic combustor and carry out catalysis burning processing.Although the technology solves secondary pollution and asks
Topic, but also have shortcoming.For example, containing H in processing2When the gas of the sulphur compounds such as S, catalyst sulfur poisoning occurs and draws
Playing catalytic activity reduces.In processing NH3Or when amine, especially there is O2In the case where co-existing in, strict control technique is needed
Otherwise condition can generate a large amount of NOx, the selectivity of denitrogenation is caused to decline.In addition, being carried out when using the heat medium other than steam
When desorption, adsorbate heated medium is diluted, and the calorific value of desorption gas is caused to decline, thus needs to provide to catalytic burner
Combustion-supporting fuel, causes energy consumption to increase.
In summary to containing H2The sulphur compounds such as S, NH3, the harmful components such as amines and VOCs such as trimethylamine pollution
The prior art of gas purification, it is cumbersome that there are treatment processes, and treatment conditions require strictly, to be also easy to produce a large amount of NOx, easily it is catalyzed
The problems such as agent sulfur poisoning easily causes purification gas yield low, and energy consumption is high.
Summary of the invention
In order to solve the above-mentioned problems of the prior art, the invention proposes a kind of purification system of polluted gas and only
Change method, especially for contain low concentration H2S、NH3, the harmful components such as amine and VOCs polluted gas, it is to be solved
Technical problem is in the treatment process of polluted gas, and there is no the sulfur poisonings of catalyst, will not generate NOx, treatment conditions are easy
Control, low energy consumption, thus more suitable for practical.
The object of the invention to solve the technical problems adopts the following technical solutions to realize.
The purification system of a kind of polluted gas proposed according to the present invention, it is characterised in that: the purification system includes
Burning chemistry chains reactor, the 1st adsorption tower, polluted gas pipeline, air pipeline, purification gas pipeline, reduction reaction product gas
Body pipeline, oxidation reaction product gas pipeline, desorption gas circulating line, circulating fan, burning chemistry chains reactor pressure meter
With pressure-regulating valve and electronic valve group；Having heaters is set on desorption gas circulating line；The burning chemistry chains are anti-
It answers and is filled with oxygen carrier in device, adsorbent is filled in adsorption tower, the polluted gas contains H2The sulphur compounds such as S, NH3, three
One or more of the volatile organic matters such as the amines such as methylamine and dimethylbenzene harmful components.
The object of the invention to solve the technical problems also can be used following technical measures and further realize.
Preferably, the purification system of polluted gas above-mentioned, wherein the oxygen carrier is copper-based oxygen carrier, iron-based oxygen carrier
One or more kinds of mixtures of body or Ni-based oxygen carrier, the adsorbent are active carbon, silica gel, activated alumina
Or one or more kinds of mixtures of molecular sieve.
Preferably, the purification system of polluted gas above-mentioned, wherein the active material of the copper-based oxygen carrier is CuO,
Carrier is Al2O3、SiO2Or TiO2One of or two or more mixtures；The active matter of the iron-based oxygen carrier
Matter is Fe2O3, carrier Al2O3、SiO2Or TiO2One of or two or more mixtures；The Ni-based oxygen carrier
Active material be NiO, carrier Al2O3、SiO2Or TiO2One of or two or more mixtures.
Preferably, the purification system of polluted gas above-mentioned, wherein the purification system further includes the 2nd adsorption tower, with
And the 1st adsorption tower and the 2nd adsorption tower switching valve group.
Preferably, the purification system of polluted gas above-mentioned, wherein the purification system further includes sulfur dioxide trapping
Device, the sulfur dioxide capturing device are arranged on oxidation reaction gas pipeline.
Preferably, the purification system of polluted gas above-mentioned, wherein the sulfur dioxide capturing device is with calcium oxide
Make the dry desulfurization device of desulfurizing agent, make the wet desulphurization device or concentrated sulfuric acid production dress of desulfurizing agent with limestone/lime slurries
It sets.
Preferably, the purification system of polluted gas above-mentioned, wherein the purification system further includes oxygen rich gas pipeline
Or pure oxygen gas pipeline.
Also the following technical solution is employed for the object of the invention to solve the technical problems to realize.
A kind of purification method of polluted gas proposed according to the present invention, using the purification system of above-mentioned polluted gas,
It is characterized in that: including,
(1) it adsorbs.Polluted gas enters in the 1st adsorption tower, and the harmful components in the polluted gas are by institute
The 1st adsorption tower absorption stated；
(2) it heats.When harmful components concentration reaches setting value in the purification gas of the 1st adsorption column outlet, make
Desorption gas recycles between the 1st adsorption tower, burning chemistry chains reactor, and heats；
(3) it is desorbed.When the temperature of the desorption gas and the 1st adsorption tower reaches setting value, the harmful components
It is desorbed out from the 1st adsorption tower；
(4) it restores.Burning chemistry chains include the reduction process of oxidation state oxygen carrier and the oxidation regeneration of reduction-state oxygen carrier
Process.When the temperature of burning chemistry chains reactor reaches setting value, harmful components for being desorbed out and described
Reduction reaction occurs for oxidation state oxygen carrier in burning chemistry chains reactor, oxidation state oxygen carrier be converted into reduction-state oxygen carrier or
Person's metal sulfide；Pressure is adjusted, the pressure of the burning chemistry chains reactor is kept constant；
(5) it aoxidizes.The harmful components concentration in desorption gas at the 1st adsorption column outlet is reduced to setting value
When, so that the 1st adsorption tower is cooled down.Open air pipeline or oxygen rich gas pipeline or purity oxygen pipeline valve, the chemical chain combustion
The reduction-state oxygen carrier or metal sulfide burnt in reactor is reacted with oxygen generation oxidation regeneration, keeps the oxidation regeneration anti-
The oxygen concentration in gaseous product answered reaches setting value.
Preferably, the purification method of polluted gas above-mentioned, when harmful in the purification gas of the 1st adsorption column outlet
When constituent concentration reaches setting value, enter the polluted gas in the 2nd adsorption tower, meanwhile, carry out described add
Heat, desorption, reduction and oxidation process, when harmful components concentration reaches setting in the purification gas of the 2nd adsorption column outlet
When value, enter the polluted gas in the 1st adsorption tower, into subsequent cycle.
Preferably, the purification method of polluted gas above-mentioned further includes the reaction product gas for making the oxidation regeneration
Into the sulfur dioxide capturing device.
Preferably, the purification method of polluted gas above-mentioned, wherein it is described the step of (3) described in adsorption tower desorption
Temperature is 100~300 DEG C；The temperature of reduction reaction described in step (4) is 200~500 DEG C；Oxygen described in step (5)
The temperature for changing regenerative response is 150~500 DEG C.
By above-mentioned technical proposal, the purification system and purification method of polluted gas of the present invention are at least had the advantage that
(1) low energy consumption.Desorption process and reduction process are using heating absorption by the gas in closed cycle adsorption tower
The mode of agent and oxygen carrier avoids a large amount of desorption gas and leaves the thermal loss taken away when system, and Cu base load oxysome with have
The reduction reaction of evil ingredient is exothermic reaction, and heat is used in itself, thus low energy consumption for desorption process and reduction process；
(2) the sulphur trapping of sulphur compound can be achieved.In reduction process, H2Sulphur in the sulphur compounds such as S is with metal sulfide
Form be captured down.In oxidative regeneration process then, by being passed through oxygen-enriched achievable SO2Enrichment method, thus
The cost and energy consumption of subsequent dry or wet sulfur removal technology can be saved.The available pure SO if being passed through pure oxygen2, can incite somebody to action
It is converted into concentrated sulfuric acid etc., to realize SO2Effective use；
(3) ammonia and the selectivity of amine denitrogenation are high, and denitrification effect is significant.For containing O simultaneously2Ammonia and amine denitrogenation
For, ammonia, amine and O may be implemented in adsorption process2Separation, then in no O2It is anti-in burning chemistry chains under conditions of coexisting
Answer the denitrogenation that ammonia and amine are realized in device.With O2Too strong oxidability is compared, and the oxidation state of copper-based equal oxygen carriers has power
Oxidability appropriate, can be by NH3With the nitrogen oxidation in amine it is the nitrogen of zeroth order, and is difficult to be further oxidized to positive two
The NO of the NO of valence or positive tetravalence2, thus the effect of denitrogenation is good, selectivity is high；
(4) harmful components total emission volumn is few.Since the emission flow of reduzate gas and oxidation product gas is than existing
Purification process it is much smaller, so the total emission volumn of remaining harmful components is considerably less in discharge gas；
(5) different from Production by Catalytic Combustion Process, sulfur poisoning will not occur for oxygen carrier.The active constituent metal oxide of oxygen carrier is
It largely, although during the reaction can be with H2S etc. generates metal sulfide, but can be weighed in subsequent oxidation regeneration reaction
It newly is converted into metal oxide, because of the problem of oxygen carrier sulfur poisoning may be not present.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
Fig. 1 is the purification system schematic diagram of the polluted gas of the embodiment of the present invention 1.
Fig. 2 is the purification system schematic diagram of the polluted gas of the embodiment of the present invention 2.
Fig. 3 is the purification system schematic diagram of the polluted gas of the embodiment of the present invention 3.
Fig. 4 is the schematic diagram of the purification system of 4-7 polluted gas of the embodiment of the present invention.
Specific embodiment
It is of the invention to reach the technical means and efficacy that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Attached drawing and preferred embodiment, purification system and purification method its specific implementation to a kind of polluted gas proposed according to the present invention
Mode, structure, feature and its effect, detailed description is as follows.In the following description, different " embodiment " or " embodiment " refers to
Be not necessarily the same embodiment.In addition, the special characteristic, structure or feature in one or more embodiments can be by any suitable
Form combination.
Embodiment 1
Please refer to Fig. 1.The purification system of polluted gas described in the present embodiment includes: the chemistry for being filled with oxygen carrier 103
Chain combustion reactor 101, the adsorption tower 102 for being filled with adsorbent 104, polluted gas pipeline 105, air pipeline 106, purified gas
Body pipeline 107, reduction reaction product gas pipeline 108, oxidation reaction product gas pipeline 109, desorption gas circulating line
110, circulating fan 111 and electronic valve group 113~117, and chemical chain is set on reduction reaction product gas pipeline 108 and is fired
Burn reactor pressure regulating valve 112, the desorption gas circulation pipe between circulating fan 111 and burning chemistry chains reactor 101
Having heaters 118 is set on road 110.
The oxygen carrier that the present embodiment uses is copper-based oxygen carrier, active material CuO, carrier Al2O3；The suction of use
Attached dose is active carbon.
Polluted gas enters adsorption tower 102 through polluted gas pipeline 105 and carries out adsorption cleaning process.Sulphur in polluted gas
Compound, NH3, the harmful components such as amine and volatile organic matter be adsorbed the absorption of agent 104 at normal temperature, purification gas is from net
Change gas pipeline 107 to be discharged.
When 104 adsorption saturation of adsorbent in adsorption tower 102, i.e. the total concentration of harmful components in purification gas, which reaches, to be set
Definite value 10mg/m3When, the motor-driven valve 113 and 114 on polluted gas pipeline 105 and purification gas pipeline 107 is closed, desorption is opened
Motor-driven valve 115 on gas recycling duct 110 starts circulating fan 111, follows desorption gas in adsorption tower 102, desorption gas
Endless tube road 110, heater 118 are recycled between burning chemistry chains reactor 101, while starting 118 pairs of desorption gas of heater
Body is heated.When adsorption tower is heated to 100 DEG C, the harmful components are desorbed out from adsorbent.
When burning chemistry chains reactor 101 is heated to 200 DEG C, the harmful components and burning chemistry chains for being desorbed out are anti-
The oxidation state oxygen carrier in device 101 is answered to carry out reduction reaction, wherein H2S and oxidation state oxygen carrier precursor reactant generate solid metallic vulcanization
Object and vapor；Sulphur compound and oxidation state oxygen carrier precursor reactant generate solid metallic sulfide, vapor and carbon dioxide；NH3
Nitrogen and vapor are generated with oxidation state oxygen carrier precursor reactant；Amine and oxidation state oxygen carrier precursor reactant generate nitrogen, vapor and two
Carbonoxide；Volatile organic matter and oxidation state oxygen carrier precursor reactant generate vapor and carbon dioxide；Meanwhile oxidation state oxygen carrier turns
Turn to reduction-state oxygen carrier；The burning chemistry chains reactor pressure regulating valve 112 is adjusted, burning chemistry chains reactor 101 is made
A part of the desorption gas of outlet is discharged as reduzate gas from reduction reaction product gas pipeline 108, with maintenance
The pressure of chain combustion reactor is learned in 0~5kPa.G.
When the wholly or largely desorption and regeneration of the adsorbent 104 in adsorption tower 102, the i.e. desorption of the outlet of adsorption tower 102
The total concentration of harmful components in gas is reduced to 50mg/m3When, the motor-driven valve 115 on desorption gas circulating line 110 is closed,
Adsorption tower 102 enters the process that cools；Close burning chemistry chains reactor pressure regulating valve 112, open air pipeline 106 with
And the motor-driven valve 116 and 117 on oxidation product gas pipeline 109, admit air into burning chemistry chains reactor 101 with reduction
State oxygen carrier carries out oxidation regeneration reaction, and reduction-state oxygen carrier is reacted with oxygen generates oxidation state oxygen carrier, solid metallic vulcanization
It closes object and reacts generation oxidation state oxygen carrier and sulfur dioxide with oxygen, oxidation product gas is through oxidation reaction product gas pipeline
109 discharges.Oxidation regeneration reaction carries out at 150 DEG C.
When reduction-state oxygen carrier is wholly or largely oxidized regeneration in burning chemistry chains reactor 101, i.e. oxidation produces
When oxygen concentration in object gas reaches 2%, stop circulating fan 111, closes air pipeline 106 and oxidation product gas pipe
Motor-driven valve 116 and 117 on road 109.And when 102 temperature of adsorption tower is close to room temperature, open polluted gas pipeline 105 and net
Change the motor-driven valve 113 and 114 on gas pipeline 107, so that polluted gas is entered adsorption tower 102 and carry out adsorption cleaning, to complete
One adsorption-desorption-redox-absorption circulation.
To handle NH3For, the oxidation state and NH of copper-based oxygen carrier at 200 DEG C3Reduction reaction, and at 150 DEG C
Reduction-state and O2Oxidation regeneration reaction reaction equation and standard free energy variation and reaction heat it is as follows:
3CuO+2NH3(g)=3Cu+N2(g)+3H2O(g) △Go=-78.56kcal/mol
△Ho=-40.05kcal/mol
2Cu+O2(g)=2CuO △ Go=-55.72kcal/mol
△Ho=-74.16kcal/mol
In addition, to handle H2For S, the oxidation state and H of copper-based oxygen carrier at 200 DEG C2The reaction of S and at 150 DEG C
Lower metal sulfide and O2Oxidation regeneration reaction reaction equation and standard free energy variation and reaction heat it is as follows:
CuO+H2S (g)=CuS+H2O(g) △Go=-29.94kcal/mol
△Ho=-28.93kcal/mol
CuS+1.5O2(g)=CuO+SO2(g) △Go=-86.25kcal/mol
△Ho=-94.99kcal/mol
Embodiment 2
Please refer to Fig. 2.The present embodiment compared with Example 1, the difference is that: the oxygen carrier that the present embodiment uses is iron
Base load oxysome, active material Fe2O3, carrier SiO2；The adsorbent used is silica gel.In desorption process, the 1st adsorption tower
102 desorption temperature is 150 DEG C, during reduction reaction, and the temperature of reduction reaction is 300 DEG C, in oxidative regeneration process, oxidation
The temperature of regenerative response is 250 DEG C.
Embodiment adds the 2nd adsorption tower 200, the 1st adsorption tower 102 and the 2nd adsorption towers that are filled with adsorbent 201
The desorption gas circulating line that 200 switching valve group 203 and 204, burning chemistry chains reactor 101 and the 2nd adsorption tower 200 connects
206 and motor-driven valve 205.
Adsorbent adsorption saturation in the 1st adsorption tower 102, i.e. the total concentration of harmful components in purification gas, which reaches, to be set
Definite value 10mg/m3When, switch the triple valve 203 and 204 on polluted gas pipeline 105 and purification gas pipeline 107, makes to pollute
Gas enter the 2nd adsorption tower 200 in carries out adsorption cleaning, while carry out the heat temperature raising in embodiment 1 to the 1st adsorption tower 102,
The reduction of desorption process and burning chemistry chains reactor 101, oxidative regeneration process, when going back for burning chemistry chains reactor 101
The regeneration that is wholly or largely oxidized of ortho states oxygen carrier stops when that is, oxygen concentration reaches setting value 2% in oxidation product gas
The motor-driven valve 116 and 117 on air pipeline 106 and oxidation product gas pipeline 109 is closed in only circulating fan 111.
When 201 adsorption saturation of adsorbent in the 2nd adsorption tower 200, i.e. the total concentration of harmful components in purification gas reaches
To setting value 10mg/m3When, switch the triple valve 203 and 204 on polluted gas pipeline 105 and purification gas pipeline 107, makes
Polluted gas, which enters in the 1st adsorption tower 102, carries out adsorption cleaning, while carrying out heat temperature raising to the 2nd adsorption tower 200, being desorbed
The reduction of journey and burning chemistry chains reactor 101, oxidative regeneration process.By to each pipeline gas flow and each valve transfer
The continuous purification, it can be achieved that polluted gas is arranged in the reasonable of time.
For handling trimethylamine, the reduction reaction of the oxidation state of iron-based oxygen carrier and trimethylamine, Yi Ji at 300 DEG C
Reduction-state and O at 250 DEG C2Oxidation regeneration reaction reaction equation and standard free energy variation and the following institute of reaction heat
Show:
63Fe2O3+2C3H9N (g)=42Fe3O4+N2(g)+9H2O(g)+6CO2(g)
4Fe3O4+O2(g)=6Fe2O3 △Go=-77.54kcal/mol
△Ho=-111.83kcal/mol
Embodiment 3
Please refer to Fig. 3.The present embodiment compared with embodiment 1 and embodiment 2, the difference is that: the present embodiment use
Oxygen carrier is copper-based oxygen carrier, active material CuO, carrier TiO2；The adsorbent used is activated alumina.It was desorbed
The desorption temperature of Cheng Zhong, the 1st adsorption tower 102 and the 2nd adsorption tower 200 is 250 DEG C, during reduction reaction, the temperature of reduction reaction
Degree is 400 DEG C, in oxidative regeneration process, and the temperature of oxidation regeneration reaction is 350 DEG C.
Sulfur dioxide capturing device 300 is arranged in the present embodiment on oxidation reaction product gas pipeline 109, for trapping oxygen
Change the SO in product gas2, sulfur dioxide capturing device 300 is the wet desulphurization for making desulfurizing agent with the slurries of lime stone or lime
Device.
For handling methyl mercaptan, the reduction reaction of the oxidation state of copper-based oxygen carrier and methyl mercaptan, Yi Ji at 400 DEG C
At 350 DEG C, metal sulfide and O2Oxidation regeneration reaction reaction equation and standard free energy variation and reaction heat such as
Shown in lower:
4CuO+CH3SH (g)=CuS+3Cu+CO2+2H2O(g)
△Go=-121.34kcal/mol
△Ho=-69.87kcal/mol
CuS+1.5O2(g)=CuO+SO2(g) △Go=-86.90kcal/mol
△Ho=-113.44kcal/mol
In addition, for handling toluene, the reduction reaction of the oxidation state of copper-based oxygen carrier and toluene at 400 DEG C, and
Reduction-state oxygen carrier and O at 350 DEG C2Oxidation regeneration reaction reaction equation and standard free energy variation and reaction heat
It is as follows:
18CuO+C7H8(g)=18Cu+7CO2(g)+4H2O(g)
2Cu+O2(g)=2CuO △ Go=-47.15kcal/mol
△Ho=-73.4lkcal/mol
Embodiment 4
Please refer to Fig. 4.For the oxygen carrier that the present embodiment uses for the mixture of copper-based and Ni-based oxygen carrier, Z carrier is Al2O3
And SiO2, adsorbent is molecular sieve.In desorption process, the desorption temperature of the 1st adsorption tower 102 and the 2nd adsorption tower 200 is 300 DEG C,
During reduction reaction, the temperature of reduction reaction is 500 DEG C, in oxidative regeneration process, and the temperature of oxidation regeneration reaction is 450
℃。
Purity oxygen is imported burning chemistry chains reactor 101 through pure oxygen feed channel 400 and carries out reduction-state oxygen carrier by the present embodiment
The oxidative regeneration process of body and metal sulfide, reaction generate oxidation state oxygen carrier and pure SO2.The titanium dioxide of the present embodiment
Sulphur capturing device 300 is concentrated sulfuric acid process units.
Embodiment 5
Please refer to Fig. 4.The oxygen carrier that the present embodiment uses is the mixture of iron-based and Ni-based oxygen carrier, Al2O3And TiO2,
Adsorbent be active carbon, silica gel, in activated alumina or molecular sieve any two combination, in desorption process, the 1st adsorption tower
The desorption temperature of 102 and the 2nd adsorption tower 200 is 200 DEG C, and during reduction reaction, the temperature of reduction reaction is 500 DEG C, oxidation
In regenerative process, the temperature of oxidation regeneration reaction is 500 DEG C.
The sulfur dioxide capturing device 300 of the present embodiment is the dry desulfurization device for making desulfurizing agent with calcium oxide.
Embodiment 6
Please refer to Fig. 4.The oxygen carrier that the present embodiment uses is the mixture of copper-based and iron-based oxygen carrier, TiO2And SiO2, inhale
From bottom to top the adsorbent of slicing and filling is followed successively by active carbon, silica gel and activated alumina in attached tower, and in desorption process, the 1st inhales
The desorption temperature of attached 102 and the 2nd adsorption tower 200 of tower is 200 DEG C, and during reduction reaction, the temperature of reduction reaction is 450 DEG C,
In oxidative regeneration process, the temperature of oxidation regeneration reaction is 500 DEG C.
The sulfur dioxide capturing device 300 of the present embodiment is the dry desulfurization device for making desulfurizing agent with calcium oxide.
Embodiment 7
Please refer to Fig. 4.The oxygen carrier that the present embodiment uses is the mixture of copper-based and iron-based oxygen carrier, in adsorption tower under
And the adsorbent of higher slice filling is followed successively by silica gel, activated alumina and molecular sieve, and in desorption process, the 1st adsorption tower 102 and the
The desorption temperature of 2 adsorption towers 200 is 300 DEG C, during reduction reaction, and the temperature of reduction reaction is 500 DEG C, oxidative regeneration process
In, the temperature of oxidation regeneration reaction is 500 DEG C.
The sulfur dioxide capturing device 300 of the present embodiment is the dry desulfurization device for making desulfurizing agent with calcium oxide.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, according to
According to technical spirit any simple modification, equivalent change and modification to the above embodiments of the invention, this hair is still fallen within
In the range of bright technical solution.
Claims (11)
1. a kind of purification system of polluted gas, it is characterised in that:
The purification system includes burning chemistry chains reactor, the 1st adsorption tower, polluted gas pipeline, air pipeline, purified gas
Body pipeline, reduction reaction product gas pipeline, oxidation reaction product gas pipeline, desorption gas circulating line, circulating fan, change
Learn chain combustion reactor pressure gauge and pressure-regulating valve and electronic valve group；Heating is provided on desorption gas circulating line
Device；It is filled with oxygen carrier in the burning chemistry chains reactor, is filled with adsorbent in adsorption tower；
Wherein, the burning chemistry chains reactor is set side by side with the 1st adsorption tower, an end interface of the 1st adsorption tower
The polluted gas pipeline is connected, another end interface of the 1st adsorption tower connects the purification gas pipeline, in the pollution
On gas pipeline and the motor-driven valve is respectively arranged on the purification gas pipeline；One end of the burning chemistry chains reactor
Interface connects air pipeline, and another end interface of the burning chemistry chains reactor connects the reduction reaction product gas pipeline
With the oxidation reaction product gas pipeline, set on the air pipeline and respectively on the oxidation reaction product gas pipeline
It is equipped with the motor-driven valve, is provided with the pressure-regulating valve on the reduction reaction product gas pipeline；1st adsorption tower
An end interface and the burning chemistry chains reactor an end interface between and the adsorption tower another end interface and institute
It states and is connected between another end interface of burning chemistry chains reactor by the desorption gas circulating line, to form a desorption
The circulation loop of gas；Between an end interface of the 1st adsorption tower and an end interface of the burning chemistry chains reactor
Desorption gas circulating line on, or the adsorption tower another end interface and the burning chemistry chains reactor it is another
The circulating fan and the burning chemistry chains reactor pressure meter are set on the desorption gas circulating line between end interface；?
Desorption gas circulating line between one end interface of the 1st adsorption tower and an end interface of the burning chemistry chains reactor
And the adsorption tower another end interface and the burning chemistry chains reactor another end interface between desorption gas recycle
The motor-driven valve is respectively arranged with close to the 1st adsorption tower side on pipeline；
When the adsorbent adsorption saturation in adsorption tower, the motor-driven valve on polluted gas pipeline and purification gas pipeline is closed, is beaten
The motor-driven valve on attached gas recycling duct is absolved, starts circulating fan, makes desorption gas in adsorption tower, desorption gas circulation pipe
Road, heater are recycled between burning chemistry chains reactor；
The polluted gas contains sulphur compound, NH3, one or more of amine and volatile organic matter it is harmful at
Point.
2. the purification system of polluted gas according to claim 1, it is characterised in that:
The oxygen carrier is one or more kinds of mixing of copper-based oxygen carrier, iron-based oxygen carrier or Ni-based oxygen carrier
Object；
The adsorbent is one or more kinds of mixtures of active carbon, silica gel, activated alumina or molecular sieve.
3. the purification system of polluted gas according to claim 2, it is characterised in that:
The active material of the copper-based oxygen carrier is CuO, carrier Al2O3、SiO2Or TiO2One of or two kinds with
On mixture；
The active material of the iron-based oxygen carrier is Fe2O3, carrier Al2O3、SiO2Or TiO2One of or two kinds
Above mixture；
The active material of the Ni-based oxygen carrier is NiO, carrier Al2O3、SiO2Or TiO2One of or two kinds with
On mixture.
4. the purification system of polluted gas according to claim 1, it is characterised in that:
The purification system further includes the switching valve group of the 2nd adsorption tower and the 1st adsorption tower and the 2nd adsorption tower.
5. the purification system of polluted gas according to claim 1, it is characterised in that:
The purification system further includes sulfur dioxide capturing device, and the oxygen is arranged in the sulfur dioxide capturing device
Change on reaction gas pipeline.
6. the purification system of polluted gas according to claim 5, it is characterised in that:
The sulfur dioxide capturing device is to make the dry desulfurization device of desulfurizing agent, with calcium oxide with limestone/lime slurries
Make the wet desulphurization device or concentrated sulfuric acid process units of desulfurizing agent.
7. the purification system of polluted gas according to claim 1, it is characterised in that:
The purification system further includes oxygen rich gas pipeline or pure oxygen gas pipeline,
The oxygen rich gas pipeline or pure oxygen gas pipeline are connect with one end of the burning chemistry chains reactor.
8. a kind of purification method of polluted gas, using the purification system of the described in any item polluted gas of claim 1-7,
It is characterized in that: including,
(1) it adsorbs, polluted gas enters in the 1st adsorption tower, and the harmful components in the polluted gas are by described
The absorption of 1st adsorption tower；
(2) it heats, when harmful components concentration reaches setting value in the purification gas of the 1st adsorption column outlet, makes to be desorbed
Gas recycles between the 1st adsorption tower, burning chemistry chains reactor, and heats；
(3) it is desorbed, when the temperature of the desorption gas and the 1st adsorption tower reaches setting value, the harmful components are from the 1st
It is desorbed out in adsorption tower；
(4) restore, when the temperature of burning chemistry chains reactor reaches setting value, the harmful components for being desorbed out with
Reduction reaction occurs for the oxidation state oxygen carrier in the burning chemistry chains reactor, and oxidation state oxygen carrier is converted into reduction-state load
Oxysome or metal sulfide；Pressure is adjusted, the pressure of the burning chemistry chains reactor is kept constant；
(5) it aoxidizes, when the harmful components concentration in desorption gas at the 1st adsorption column outlet is reduced to setting value,
So that the 1st adsorption tower is cooled down, opens air pipeline or oxygen rich gas pipeline or purity oxygen pipeline valve, the burning chemistry chains are anti-
It answers reduction-state oxygen carrier or metal sulfide and oxygen in device that oxidation regeneration occurs to react, reacts the oxidation regeneration
Oxygen concentration in gaseous product reaches setting value.
9. the purification method of polluted gas according to claim 8, it is characterised in that: further include,
(1) when harmful components concentration reaches setting value in the purification gas of the 1st adsorption column outlet, make the pollution
Gas enters in the 2nd adsorption tower, meanwhile, carry out heating, desorption, reduction and the oxidation process；
(2) when harmful components concentration reaches setting value in the purification gas of the 2nd adsorption column outlet, make the pollution
Gas enters in the 1st adsorption tower, into subsequent cycle.
10. the purification method of polluted gas according to claim 9, it is characterised in that: further include,
The reaction product gas of the oxidation regeneration is set to enter sulfur dioxide capturing device.
11. the purification method of polluted gas according to claim 8, it is characterised in that:
The desorption temperature of adsorption tower described in step (3) is 100~300 DEG C；
The temperature of reduction reaction described in step (4) is 200~500 DEG C；
The temperature of the reaction of oxidation regeneration described in step (5) is 150~500 DEG C.
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| CN105944499B (en) * | 2016-06-23 | 2019-02-01 | 北京北大先锋科技有限公司 | A kind of method that temp.-changing adsorption removes sulfur dioxide in industrial tail gas |
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