CN108579414A - A kind of chlorinated organics emission-control equipment - Google Patents
A kind of chlorinated organics emission-control equipment Download PDFInfo
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- CN108579414A CN108579414A CN201810465604.1A CN201810465604A CN108579414A CN 108579414 A CN108579414 A CN 108579414A CN 201810465604 A CN201810465604 A CN 201810465604A CN 108579414 A CN108579414 A CN 108579414A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8659—Removing halogens or halogen compounds
- B01D53/8662—Organic halogen compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/652—Chromium, molybdenum or tungsten
- B01J23/6522—Chromium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/847—Vanadium, niobium or tantalum or polonium
- B01J23/8476—Tantalum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20707—Titanium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20738—Iron
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20792—Zinc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/209—Other metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/209—Other metals
- B01D2255/2092—Aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/30—Silica
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/40—Mixed oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/70—Non-metallic catalysts, additives or dopants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/10—Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
Abstract
The present invention relates to a kind of chlorinated organics emission-control equipments, burner is equipped with reative cell and combustion chamber along gas circulating direction, the gas access of reative cell is connected to the refrigerant exit of heat exchanger, the gas discharge end of reative cell is connected to the gas upstream end of combustion chamber, and the gas vent of combustion chamber is connected to the Heating medium of heat exchanger.Microwave applicator is equipped in reative cell, and the inner space of reative cell is filled with catalytic reaction oxidant layer, electric heater is equipped in combustion chamber, and the inner space of combustion chamber is filled with catalyst bed, the catalytic reaction oxidant layer filled by the inner space of reative cell will contain chlorine organic exhaust gas and activate, then the Cr Ce Ti composite catalysts of the supported palladium used in the combustion chamber substantially increase the conversion of contamination with chlorinated organics in exhaust gas, and the removal rate of chlorinated organics can reach 99.1% or more in exhaust gas.
Description
Technical field
The present invention relates to technical field of waste gas treatment more particularly to a kind of chlorinated organics emission-control equipments.
Background technology
In chemical process, often uses dichloromethane, chlorobenzene etc. and used as solvent, due to the volatilization of solvent
Property is strong, certain density chlorinated organics is inevitably resulted from exhaust gas, most of enterprise, which takes, is directly discharged into air
Measure, cause more serious environmental pollution.
Currently, domestic generally handle organic exhaust gas containing chlorine using adsorption tower filtering or the method burnt.It is adopting
When being handled with adsorption tower, after being saturated using activated carbon adsorption exhaust gas, carry out having in Detachment Activity charcoal using vapor or nitrogen
Solvent molecule, which needs to regularly replace activated carbon, and the adsorption rate of activated carbon is relatively low, leads to the treatment effect of exhaust gas not
It is ideal, it is difficult to meet environmental requirement.Combustion method is to reduce activation energy by the effect of catalyst in burner so that
Under the conditions of lower initiation temperature flameless combustion occurs for exhaust gas, and oxygenolysis is carbon dioxide and water, while releasing a large amount of
Thermal energy, to achieve the purpose that harmful substance in removing exhaust gas.
In the prior art, using Production by Catalytic Combustion Process handle chlorinated organics exhaust gas effect and for heat recycling also
Need to be further increased.
Invention content
For the above problem of the prior art, the object of the present invention is to provide a kind of chlorinated organics exhaust-gas treatment dresses
It sets, which can reach 99% or more to the removal rate of organic matter in exhaust gas, and heat recovery rate reaches 97%.
In order to solve the above-mentioned technical problem, technical scheme is as follows：
A kind of chlorinated organics emission-control equipment includes mixer, the air inducing being sequentially communicated by gas transmission pipeline
Machine, heat exchanger and burner, the mixer are equipped with the first import, the second import and first outlet, first import
It is connect with exhaust pipe, second import is connect with blowpipe, and the first outlet passes through the air-introduced machine
It being connected to the refrigerant inlet of the heat exchanger, the burner is equipped with reative cell and combustion chamber along the direction that gas circulates,
The gas access of the reative cell is connected to the refrigerant exit of the heat exchanger, the gas discharge end of the reative cell with it is described
The gas upstream end of combustion chamber is connected to, and the gas vent of the combustion chamber is connected to the Heating medium of the heat exchanger, described
Microwave applicator is equipped in reative cell, and the inner space of the reative cell is filled with catalytic reaction oxidant layer, in the combustion chamber
Equipped with electric heater, and the inner space of the combustion chamber is filled with combustion catalyst bed.
Further, in terms of parts by weight, the catalysts include following components：40~50 parts of silica, 10
~20 parts of diboron trioxide, 10~20 parts of titanium dioxide and 25~20 parts of alchlor, 0.1~10 part of ZnO, 0.1
~10 parts of Fe2O3And 1~10 part of TaC.
Further, the preparation method for answering catalyst includes the following steps：
Step 1) is passed through the raw material of silica, boron oxide, aluminium oxide, zinc oxide, iron oxide by certain mass ratio
Wet mixed uses 1~2h of ultrasonic disperse in mixed process, obtains mixed raw material A；
Step 2), by above-mentioned mixed raw material A it is spray-dried after at 800~900 DEG C roast 1~3 hour, obtain original
Feed powder end B；
Step 3) adds a certain amount of nanometer TaC and suitable organic bond, dispersant in above-mentioned raw materials powder B
And plasticizer, ceramic slurry is made after ultrasonic disperse；
Ceramic slurry after dry mixed is packed into mold by step 4), moulding in the mode of hot pressing, obtains ceramic green sheet
C；
Above-mentioned ceramic green sheet C is put into the furnace chamber of microwave agglomerating furnace and is sintered 80 minutes~200 minutes by step 5),
Then it is micro- to be cooled to 600 DEG C of closings with 3~8 DEG C/min for 825 DEG C~925 DEG C of sintering temperature, soaking time 5 minutes~60 minutes
Wave source, natural cooling to get.
Further, the combustion catalyst is the Cr-Ce-Ti composite catalysts of supported palladium, according to mass percent
Meter, wherein palladium accounts for 0.5~1%, and chromium oxide accounts for 2~4%, and cerium oxide accounts for 44.5~65%, and titanium oxide accounts for 53%~30%.
Further, the preparation method of the Cr-Ce-Ti composite catalysts of the supported palladium includes the following steps：
(1) a certain amount of chromium oxide, cerium oxide and titanium oxide are put into ball mill and carry out mixing and ball milling, obtain composite powder
End；
(2) above-mentioned composite powder is configured to slurry with deionized water, and be added into the slurry dispersant formed it is outstanding
Supernatant liquid, then thin wall ceramic honeycomb substrate is entered in the suspension, then takes out, and after blowing away extra liquid, carries out
Dry, calcining, obtains catalyst first product；
(3) the catalyst first product is immersed in palladium bichloride ammonia solution, then takes out dry, calcining, obtained described negative
Carry the Cr-Ce-Ti composite catalysts of palladium.
Wherein, the time of mixing and ball milling is 40~60 hours.The drying temperature is 90~100 DEG C, calcination temperature 350
~400 DEG C, calcination time is 1~3 hour.A concentration of 1~2g/l of the palladium bichloride ammonia solution.The dispersant is polypropylene
One or more of sour sodium, sodium polycarboxylate or styrene-maleic anhydride copolymer.
Wherein, thin wall ceramic honeycomb substrate is made of china clay and aluminium oxide, and the weight ratio of china clay and aluminium oxide is 1~2:
1。
Further, there are multiple baffle plates along the directional spreding of gas flowing in the mixer.
Further, it is set on the connecting line between the gas vent of the combustion chamber and the Heating medium of the heat exchanger
There are concentration detector, the blowpipe to be equipped with flow control valve, the flow control valve and the Concentration Testing
Instrument connection communication.
Compared with prior art, a kind of chlorinated organics emission-control equipment of the invention has as follows
Advantageous effect：
(1) exhaust gas of the invention carries out heat exchange at heat exchanger with the gas being discharged from combustion chamber, to not only return
Received the heat in burning treated gas, and the temperature for the exhaust gas being discharged by heat exchanger refrigerant exit reach 200~
400 DEG C, the indoor heat consumption of subsequent reactions is greatly reduced, in addition, default room its heating effect by the way of microwave heating
Rate higher, reduces energy consumption
(2) the catalytic reaction oxidant layer filled by the inner space of reative cell will contain chlorine organic exhaust gas and activate, then
The Cr-Ce-Ti composite catalysts of the supported palladium used in the combustion chamber substantially increase contamination with chlorinated organics in exhaust gas
It converts, the removal rate of chlorinated organics can reach 99.1% or more in exhaust gas.
Description of the drawings
It, below will be to required in embodiment or description of the prior art in order to illustrate more clearly of technical scheme of the present invention
The attached drawing used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, right
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Its attached drawing.
Fig. 1 is a kind of structural schematic diagram of chlorinated organics emission-control equipment provided by the invention.
Specific implementation mode
Technical scheme in the embodiment of the invention is clearly and completely described below in conjunction with the accompanying drawings, it is clear that described
Embodiment be only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained without making creative work, belongs to the present invention
The range of protection.
The present invention provides a kind of chlorinated organics emission-control equipment, as shown in Figure 1, the device includes being conveyed by gas
Pipeline is sequentially connected mixer 1, air-introduced machine 2, heat exchanger 3 and burner 4, and the mixer 1 is equipped with the first import 11, the
Two imports 12 and first outlet 13, first import 11 are connect with exhaust pipe 5, second import 12 and compressed air
Delivery pipe 6 connects, and the first outlet 13 is connected to by the air-introduced machine 2 with the refrigerant inlet 31 of the heat exchanger.
The burner 4 is equipped with reative cell 41 and combustion chamber 42, the gas of the reative cell along the direction that gas circulates
Entrance 411 is connected to the refrigerant exit 32 of the heat exchanger, gas discharge end 412 and the combustion chamber of the reative cell
Gas upstream end 421 is connected to, and the gas vent 422 of the combustion chamber is connected to the Heating medium 33 of the heat exchanger.
Microwave applicator 413 is equipped in the reative cell 41, and the inner space of the reative cell 41 is urged filled with reaction
Agent layer.
Preferably, the catalytic reaction oxidant layer includes following components：20~30 parts of mullite, 5~10 parts of clay, 20
~30 parts of Al2O3, 25~45 parts of SiO2With 10~20 parts of TiC.
Preferably, the power of the microwave applicator is 1200~2000W, and frequency is 50~80Hz.
Electric heater 423 is equipped in the combustion chamber 42, and the inner space of the combustion chamber 42 is filled with catalyst bed
Layer.
Preferably, the catalyst is the Cr-Ce-Ti composite catalysts of supported palladium, according to mass percent meter,
In, palladium accounts for 0.5~1%, and chromium oxide accounts for 2~4%, and cerium oxide accounts for 44.5~65%, and titanium oxide accounts for 53%~30%.
The preparation method of the Cr-Ce-Ti composite catalysts of above-mentioned supported palladium is as follows：
(1) a certain amount of chromium oxide, cerium oxide and titanium oxide are put into ball mill and carry out mixing and ball milling, obtain composite powder
End；
(2) above-mentioned composite powder is configured to slurry with deionized water, and be added into the slurry dispersant formed it is outstanding
Supernatant liquid, then thin wall ceramic honeycomb substrate is entered in the suspension, then takes out, and after blowing away extra liquid, carries out
Dry, calcining, obtains catalyst first product；
(3) the catalyst first product is immersed in palladium bichloride ammonia solution, then takes out dry, calcining, obtained described negative
Carry the Cr-Ce-Ti composite catalysts of palladium.
Wherein, the time of mixing and ball milling is 40~60 hours.The drying temperature is 90~100 DEG C, calcination temperature 350
~400 DEG C, calcination time is 1~3 hour.A concentration of 1~2g/l of the palladium bichloride ammonia solution.The dispersant is polypropylene
One or more of sour sodium, sodium polycarboxylate or styrene-maleic anhydride copolymer.
In one embodiment, there are multiple baffle plates along the directional spreding of gas flowing in the mixer 1.
In order to enable the exhaust gas in gas apparatus 4 being capable of adequately burning processing, the gas vent 422 of the combustion chamber and institute
The connecting line stated between the Heating medium 22 of heat exchanger is equipped with concentration detector 7, and the blowpipe 6 is equipped with
Flow control valve 8, the flow control valve 8 and 7 connection communication of the concentration detector.As the row that concentration detector 7 detects
When the concentration of organic pollution in the gas gone out is higher, by the aperture for adjusting flow control valve 8 so that enter in device
Air content increases, to promote the degradation of organic pollution.
In order to more clearly illustrate the exhaust treatment system of the present invention, specific embodiment is given below.
【Embodiment 1】
S1, catalysts are prepared：
By certain mass ratio by grain size in 3.0 μm or less silica, boron oxide, aluminium oxide, iron oxide, magnesia
Raw material uses ultrasonic disperse 2h, obtains mixed raw material A through wet mixed in mixed process, by mixed raw material A it is spray-dried after
3 hours of roasting obtain raw material powder B at 850 DEG C.Then a certain amount of nanometer TaC and appropriate is added in raw material powder B
Polyvinyl butyral, n-butyl phthalate and waterglass, ceramic slurry is made after ultrasonic disperse, will dry
Mixed ceramic slurry is packed into mold, moulding in the mode of hot pressing, obtains ceramic green sheet C, and ceramic green sheet C is put into microwave
It is sintered in the furnace chamber of sintering furnace 5 hours, 850 DEG C of sintering temperature, 40 minutes is kept the temperature after sintering, then with 5 DEG C/min
500 DEG C of closing microwave sources are cooled to, natural cooling obtains the ceramic material of plate, and each middle raw material is controlled in preparation process
Dispensing ratio makes the catalyst group of gained become：In terms of parts by weight, include 50 parts of silica, 10 parts of diboron trioxide,
15 parts of titanium dioxide and 200 parts of alchlor, 0.1 part of ZnO, 10 parts of Fe2O3And 10 parts of TaC.
S2, combustion catalyst is prepared：
(1) chromium oxide, cerium oxide and titanium oxide are carried out ball milling mixing and obtains composite powder in mass ratio, rotational speed of ball-mill is
150 turns/min, Ball-milling Time is 40 hours, ratio of grinding media to material 10:1, chromium oxide accounts for 2% in composite powder, and cerium oxide accounts for 44.5%,
Titanium oxide accounts for 53%%.
(2) above-mentioned composite powder is configured to slurry with deionized water, and dispersant polypropylene is added into the slurry
Sour sodium forms suspension, then thin wall ceramic honeycomb substrate is entered in the suspension 1 minute, then takes out, and blow away more
It after remaining liquid, is dried, calcines, obtain catalyst first product.
Wherein, thin wall ceramic honeycomb substrate is 1 by weight ratio:1 china clay and aluminium oxide is constituted.Drying temperature is 90 DEG C,
Calcination temperature is 350 DEG C, and calcination time is 1 hour.
(3) above-mentioned catalyst first product is immersed in the palladium bichloride ammonia solution of 1g/l, then takes out dry, calcining, obtains
The Cr-Ce-Ti composite catalysts of supported palladium, the wherein load capacity of palladium are 0.5%.
Prepared catalysts are fitted into reative cell, combustion catalyst is fitted into combustion chamber, then to this reality
The exhaust gas for being passed through the organic pollution containing 20 weight % of dichloromethane in the chlorinated organics emission-control equipment of example is applied, is passed through
The removal of organic pollution can be obtained by the concentration before and after the chlorinated organics emission-control equipment by calculating organic pollution
Rate.After tested, the removal rate of the dichloromethane in the present embodiment exhaust gas reaches 99.1%, and heat recovery rate reaches 93%.
【Embodiment 2】
S1, catalysts are prepared：
By certain mass ratio by grain size in 3.0 μm or less silica, boron oxide, aluminium oxide, iron oxide, magnesia
Raw material uses ultrasonic disperse 2h, obtains mixed raw material A through wet mixed in mixed process, by mixed raw material A it is spray-dried after
3 hours of roasting obtain raw material powder B at 850 DEG C.Then a certain amount of nanometer TaC and appropriate is added in raw material powder B
Polyvinyl butyral, n-butyl phthalate and waterglass, ceramic slurry is made after ultrasonic disperse, will dry
Mixed ceramic slurry is packed into mold, moulding in the mode of hot pressing, obtains ceramic green sheet C, and ceramic green sheet C is put into microwave
It is sintered in the furnace chamber of sintering furnace 5 hours, 850 DEG C of sintering temperature, 40 minutes is kept the temperature after sintering, then with 5 DEG C/min
500 DEG C of closing microwave sources are cooled to, natural cooling obtains the ceramic material of plate, and each middle raw material is controlled in preparation process
Dispensing ratio makes the catalyst group of gained become：In terms of parts by weight, include 45 parts of silica, 20 parts of diboron trioxide,
15 parts of titanium dioxide and 200 parts of alchlor, 5 parts of ZnO, 0.1 part of Fe2O3And 1 part of TaC.
S2, combustion catalyst is prepared：
(1) chromium oxide, cerium oxide and titanium oxide are carried out ball milling mixing and obtains composite powder in mass ratio, rotational speed of ball-mill is
150 turns/min, Ball-milling Time is 60 hours, ratio of grinding media to material 10:1, chromium oxide accounts for 3% in composite powder, and cerium oxide accounts for 55%, oxygen
Change titanium and accounts for 40%.
(2) above-mentioned composite powder is configured to slurry with deionized water, and dispersant polypropylene is added into the slurry
Sour sodium forms suspension, then thin wall ceramic honeycomb substrate is entered in the suspension 1 minute, then takes out, and blow away more
It after remaining liquid, is dried, calcines, obtain catalyst first product.
Wherein, thin wall ceramic honeycomb substrate is 2 by weight ratio:1 china clay and aluminium oxide is constituted.Drying temperature is 100 DEG C,
Calcination temperature is 350 DEG C, and calcination time is 2 hours.
(3) above-mentioned catalyst first product is immersed in the palladium bichloride ammonia solution of 2g/l, then takes out dry, calcining, obtains
The Cr-Ce-Ti composite catalysts of supported palladium, the wherein load capacity of palladium are 1%.
Prepared catalysts are fitted into reative cell, combustion catalyst is fitted into combustion chamber, then to this reality
The exhaust gas for being passed through the organic pollution containing 20 weight % of chlorobenzene in the chlorinated organics emission-control equipment of example is applied, calculating is passed through
Organic pollution can obtain the removal rate of organic pollution by the concentration before and after the chlorinated organics emission-control equipment.Through
It tests, the removal rate of the dichloromethane in the present embodiment exhaust gas reaches 99.3%, and heat recovery rate reaches 92%.
【Comparative example 1】
Withouyt catalyst in reative cell, only the combustion catalyst prepared by embodiment 1 is fitted into combustion chamber, then to
It is passed through the exhaust gas of the organic pollution containing 20 weight % of dichloromethane in chlorinated organics emission-control equipment, has by calculating
Machine pollutant can obtain the removal rate of organic pollution by the concentration before and after the chlorinated organics emission-control equipment.Through surveying
It tries, the removal rate of the dichloromethane in the present embodiment exhaust gas is 77%, and heat recovery rate reaches 89%.
【Comparative example 2】
Withouyt catalyst in reative cell, only the combustion catalyst prepared by embodiment 2 is fitted into combustion chamber, then to
It is passed through the exhaust gas of the organic pollution containing 20 weight % of chlorobenzene in the chlorinated organics emission-control equipment of the present embodiment, passes through
The removal of organic pollution can be obtained by the concentration before and after the chlorinated organics emission-control equipment by calculating organic pollution
Rate.After tested, the removal rate of the dichloromethane in the present embodiment exhaust gas reaches 65%, and heat recovery rate reaches 88%.
A kind of chlorinated organics emission-control equipment of the present invention compared with prior art, has the advantages that：
(1) exhaust gas of the invention carries out heat exchange at heat exchanger with the gas being discharged from combustion chamber, to not only return
Received the heat in burning treated gas, and the temperature for the exhaust gas being discharged by heat exchanger refrigerant exit reach 200~
400 DEG C, greatly reduce the indoor heat consumption of subsequent reactions.In addition, default room its heating effect by the way of microwave heating
Rate higher, reduces energy consumption, and the heat recovery rate of the present apparatus has reached 92% or more.
(2) the catalytic reaction oxidant layer filled by the inner space of reative cell will contain chlorine organic exhaust gas and activate, then
The Cr-Ce-Ti composite catalysts of the supported palladium used in the combustion chamber substantially increase contamination with chlorinated organics in exhaust gas
It converts, the removal rate of chlorinated organics can reach 99.1% or more in exhaust gas.
Above description has fully disclosed the specific implementation mode of the present invention.It should be pointed out that being familiar with the field
Technical staff is to any change for being done of specific implementation mode of the present invention all without departing from the range of claims of the present invention.
Correspondingly, the scope of the claims of the invention is also not limited only to previous embodiment.
Claims (6)
1. a kind of chlorinated organics emission-control equipment, which is characterized in that include being mixed by what gas transmission pipeline was sequentially communicated
Clutch, air-introduced machine, heat exchanger and burner, the burner are equipped with reative cell and combustion chamber along the direction that gas circulates,
The gas access of the reative cell is connected to the refrigerant exit of the heat exchanger, the gas discharge end of the reative cell with it is described
The gas upstream end of combustion chamber is connected to, and the gas vent of the combustion chamber is connected to the Heating medium of the heat exchanger, described
Microwave applicator is equipped in reative cell, and the inner space of the reative cell is filled with catalysts, is set in the combustion chamber
There is electric heater, and the inner space of the combustion chamber is filled with combustion catalyst.
2. chlorinated organics emission-control equipment according to claim 1, which is characterized in that described in terms of parts by weight
Catalysts include following components：40~50 parts of silica, 10~20 parts of diboron trioxide, 10~20 parts of titanium dioxide
Titanium and 25~20 parts of alchlor, 0.1~10 part of ZnO, 0.1~10 part of Fe2O3And 1~10 part of TaC.
3. chlorinated organics emission-control equipment according to claim 2, which is characterized in that the system of the catalysts
Preparation Method includes the following steps：
Step 1), by certain mass ratio by silica, boron oxide, aluminium oxide, zinc oxide, iron oxide raw material through wet type
It mixes, 1~2h of ultrasonic disperse is used in mixed process, obtains mixed raw material A；
Step 2), by above-mentioned mixed raw material A it is spray-dried after at 800~900 DEG C roast 1~3 hour, obtain raw material powder
Last B；
Step 3), added in above-mentioned raw materials powder B a certain amount of nanometer TaC and suitable organic bond, dispersant and
Ceramic slurry is made in plasticizer after ultrasonic disperse；
Ceramic slurry after dry mixed is packed into mold by step 4), moulding in the mode of hot pressing, obtains ceramic green sheet C；
Above-mentioned ceramic green sheet C is put into the furnace chamber of microwave agglomerating furnace and is sintered 80 minutes~200 minutes by step 5), sintering
Then 825 DEG C~925 DEG C of temperature, soaking time 5 minutes~60 minutes are cooled to 600 DEG C of closing microwaves with 3~8 DEG C/min
Source, natural cooling to get.
4. chlorinated organics emission-control equipment according to claim 1, which is characterized in that the combustion catalyst is negative
The Cr-Ce-Ti composite catalysts for carrying palladium, according to mass percent meter, wherein palladium accounts for 0.5~1%, and chromium oxide accounts for 2~4%,
Cerium oxide accounts for 44.5~65%, and titanium oxide accounts for 53%~30%.
5. chlorinated organics emission-control equipment according to claim 4, which is characterized in that the Cr-Ce- of the supported palladium
The preparation method of Ti composite catalysts includes the following steps：
(1) a certain amount of chromium oxide, cerium oxide and titanium oxide are put into ball mill and carry out mixing and ball milling, obtain composite powder；
(2) above-mentioned composite powder is configured to slurry with deionized water, and dispersant is added into the slurry and forms suspension,
Thin wall ceramic honeycomb substrate is entered in the suspension again, is then taken out, and after blowing away extra liquid, be dried,
Calcining, obtains catalyst first product；
(3) the catalyst first product is immersed in palladium bichloride ammonia solution, then takes out dry, calcining, obtains the supported palladium
Cr-Ce-Ti composite catalysts.
6. chlorinated organics emission-control equipment according to claim 1, which is characterized in that the mixer is equipped with the
One import, the second import and first outlet, first import are connect with exhaust pipe, second import and compressed air
Delivery pipe connects, and the first outlet is connected to by the air-introduced machine with the refrigerant inlet of the heat exchanger；The combustion chamber
Gas vent and the Heating medium of the heat exchanger between connecting line be equipped with concentration detector, the compressed air is defeated
Pipe is sent to be equipped with flow control valve, the flow control valve and the concentration detector connection communication.
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| CN109675400A (en) * | 2018-12-28 | 2019-04-26 | 武汉理工大学 | Organic exhaust gas high temperature pyrolysis device |
| CN109915841A (en) * | 2019-03-04 | 2019-06-21 | 广东粤清环境科技有限公司 | A kind of minimizing technology of organic exhaust gas |
| CN113266837A (en) * | 2021-04-06 | 2021-08-17 | 常州大学 | Treatment method of chlorine-containing organic waste gas |
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