CN108371876A - A kind of catalytic oxidizing equipment and method of efficient process VOCs organic exhaust gas - Google Patents
A kind of catalytic oxidizing equipment and method of efficient process VOCs organic exhaust gas Download PDFInfo
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- CN108371876A CN108371876A CN201810290138.8A CN201810290138A CN108371876A CN 108371876 A CN108371876 A CN 108371876A CN 201810290138 A CN201810290138 A CN 201810290138A CN 108371876 A CN108371876 A CN 108371876A
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- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000008569 process Effects 0.000 title claims abstract description 31
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 30
- 230000001590 oxidative effect Effects 0.000 title claims abstract description 17
- 239000003054 catalyst Substances 0.000 claims abstract description 77
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 66
- 230000003647 oxidation Effects 0.000 claims abstract description 24
- 239000007789 gas Substances 0.000 claims description 112
- 239000000178 monomer Substances 0.000 claims description 33
- 239000011941 photocatalyst Substances 0.000 claims description 29
- 238000001816 cooling Methods 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 17
- 238000006555 catalytic reaction Methods 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000013618 particulate matter Substances 0.000 claims description 9
- 230000009970 fire resistant effect Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 6
- 230000000740 bleeding effect Effects 0.000 claims description 5
- 239000012774 insulation material Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000000746 purification Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 description 7
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000003795 desorption Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
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- 239000000843 powder Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
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Classifications
-
- 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
- B01D53/8696—Controlling the catalytic process
-
- 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
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
-
- 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
- B01D53/88—Handling or mounting catalysts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The present invention relates to a kind of catalytic oxidizing equipments and method of efficient process VOCs organic exhaust gas.The catalytic oxidizing equipment of the efficient process VOCs organic exhaust gas includes dry filter, spark arrester, heat exchanger, heater and catalyst oxidation reactor, wherein, dry filter is connected with spark arrester, spark arrester is connected with the cold-side inlet of heat exchanger, the cold side outlet of heat exchanger is connected with heater, heater is connected with catalyst oxidation reactor, and catalyst oxidation reactor is connected with the hot-side inlet of heat exchanger, and the hot junction outlet of heat exchanger is connected with chimney.Present invention improves catalyst oxidation reactor structure, energy consumption is reduced while improving device reliability, ensures the purification efficiency of catalyst utilization and device to exhaust gas, device in the process of running, a concentration of 0.5 6g/m of entrance VOCs organic exhaust gas3, reaction velocity SV=5K 30K h‑1, device is to the removal efficiency of VOCs up to 99.5% or more.
Description
Technical field
The present invention relates to a kind of catalytic oxidizing equipments and method of efficient process VOCs organic exhaust gas.
Background technology
Volatile organic compounds (VOCs) is after SO2、NOxExcept another important pollutant, it is heavy to be brought to environment and life
Weight power.China VOCs there are discharge capacitys it is big, source is complicated the features such as, the industries such as application, printing, chemical industry have promulgated VOCs in succession
Discharge standard, to cut down VOCs discharges.Catalysis-oxidation is to remove the effective means of VOCs, will under heating and catalyst action
VOCs is oxidized to innoxious H2O and CO2。
The core of catalysis-oxidation is CO (Catalytic Oxidation) reactors and catalyst, direct decision systems
Treatment effeciency and energy consumption, conventional CO reactors, catalyst elements are piled up into catalyst bed, and catalyst bed uses laminates
It sets.That there are efficiency is low for reactor, complicated, volume is big, and catalyst installation and replacement are inconvenient, air-flow, Temperature Distribution it is uniform
The shortcomings of property is poor, exists simultaneously poor sealing, easily forms short stream, cause CO reactor for treatment efficiency low.In order to improve equipment
Except efficiency, optimization airflow, Temperature Distribution and recycling thermal energy, prior art discloses certain methods and strategy.
Patent CN 204285486 discloses a kind of device of processing forming machine exhaust gas, by electrostatic precipitator and catalytic module
Combination, electrostatic precipitator remove the particulate matter in removing exhaust gas, and core cell catalysis oxidation module removes the VOCs in removing exhaust gas, cellular
Catalyst is assembled into catalyst bed, and structure of reactor is complicated, and gas distribution uniformity is poor.Patent CN205461796 is disclosed
A kind of device of efficient process organic exhaust gas VOCs, using catalysis-combustion method, inside reactor is catalyst filling layer, filling
The not equal nano-pore of level, rare earth containing zeolite effective catalyst, the purification efficiency of system>99%.But pellet type catalyst causes
Resistance increases, and is unfavorable for air flow method, easily forms short stream and localised load increases, in addition, reaction heat is not easy to spread, easily cause to urge
Agent bed temperature increases, and then catalyst is caused sintering, inactivation occur.CN 107583409 is disclosed at a kind of novel VOC
Reason system, using zeolite molecular sieve runner+catalysis combustion mode, zeolite molecular sieve runner is absorption-enriching section, catalysis-burning
Reactor includes catalytic plate and heat exchanger, and catalytic plate is arranged 3-5 layers, and catalytic plate exit gas enters heat exchanger, divides for heating
Son sieve runner desorption gas, to reduce energy consumption.But there are air flow method unevenness, to fluctuating bad adaptability.CN 107497291 is public
A kind of combustion-type VOC processing units have been opened, absorption, preheating and catalysis burning are integrated in one, mainly utilize waste gas burning
The heat of generation preheats the exhaust gas for entering catalytic combustion system, reduces energy consumption, is not optimized to reactor.
It is currently used for catalysis-oxidation reactor of VOCs processing, it is characterised in that reactor is a cuboid cavity, catalysis
Bed is assembled through the mode of piling up by catalyst monomer, and reactor needs that complicated reducer union, conversion valve etc. is arranged, and is fabricated to
This is big.In addition, that there is also equipment volumes is big, air flow method is uneven, structure of reactor is complicated, catalyst installation, regeneration and replaces
Inconvenience etc..
Invention content
In view of the problems of the existing technology and insufficient, the present invention provides a kind of catalysis of efficient process VOCs organic exhaust gas
Oxidation unit and method, wherein catalysis-oxidation reactor included by the catalytic oxidizing equipment of efficient process VOCs organic exhaust gas
Be composed of multiple independent single tube reactors, effectively overcome traditional reactor there are the shortcomings that.
Technical proposal that the invention solves the above-mentioned problems is as follows：A kind of catalysis oxidation dress of efficient process VOCs organic exhaust gas
It sets including dry filter (1), spark arrester (2), heat exchanger (3), heater (4) and catalysis-oxidation reactor, wherein described
Dry filter (1) is connected with the spark arrester (2), and the spark arrester (2) is connected with the cold-side inlet of the heat exchanger (3),
The cold side outlet of the heat exchanger (3) is connected with the heater (4), the heater (4) and the catalysis-oxidation reactor
It is connected, the catalysis-oxidation reactor is connected with the hot-side inlet of the heat exchanger (3), and the hot junction of the heat exchanger (3) goes out
Mouth is connected with chimney (11).
Further, one end of the dry filter (1) is dense by air inlet motor-driven valve (V1) and exhaust gas discharge end or absorption
Contracting desorption end is connected, and the other end of the dry filter (1) is connected with the spark arrester (2)；The heat exchanger (3) it is cold
It brings out mouth with the entrance of the heater (4) to be connected, and the outlet of the heater (4) passes through expansion joint (5) and the catalysis-
Oxidation reactor is connected；The hot junction outlet of the heat exchanger (3) is connected by air-introduced machine (10) with chimney (11).
Further, the catalysis-oxidation reactor is by gas manifold (6), photocatalyst module (7) and gas mixing box
(8) it constitutes, the entrance of the gas manifold (6) is connected by expansion joint (5) with the outlet of the heater (4), the gas
The outlet of body distributor box (6) is connected by quick change clip (12) with the entrance of the photocatalyst module (7), the photocatalyst module
(7) outlet is connected by quick change clip (12) with the entrance of the gas mixing box (8), and the gas mixing box (8)
Outlet is connected with the hot-side inlet of the heat exchanger (3).
In the present invention, the structure of quick change clip is U-shaped structure, possessed outside up and down by U-shaped structure itself
The card of extension hangs over the inlet of the outlet and the gas mixing box (8) of the gas manifold (6), convenient for picking and placeing at any time
It replaces.
Further, urgent air bleeding valve (EV1) and pressure controller (P1) are connected on the gas manifold (6).
The urgent air bleeding valve (EV1) and the pressure controller (P1) can prevent from reacting too fast and leading to catalyst converter mould
Block (7) interior pressure rise.
Further, by least one single tube reactor (71), assembling is constituted the photocatalyst module (7) side by side, the single tube
Reactor (71) by catalyst monomer (711), fire resistant seal liner (712), cylinder (713), insulating layer (714) and reactor outside
Shell (715) is constituted, wherein the catalyst monomer (711) is mounted in the cylinder (713), the catalyst monomer (711)
There are the fire resistant seal liner (712), the cylinder (713) and the shell of reactor (715) between the cylinder (713)
Between filled with flame-proof thermal insulation material constitute insulating layer (714).
In the present invention, the photocatalyst module (7) is assembled into catalysis side by side using at least one single tube reactor (71)
Bed has the advantages that：1, catalyst loading is uniform, good airproof performance；2, catalyst light-off is fast, and utilization rate is high, and
It can keep excellent catalytic activity；3, modularized design facilitates the maintenance, regeneration and replacement of catalyst.
Further, catalyst monomer (711) described in installation 1-4 blocks in the single tube reactor (71), and the single tube is anti-
Answer device (71) that there are single tube reactor air inlet (72) and single tube reactor gas outlet (73), wherein the single tube reactor air inlet
Mouth (72) is connected with the gas manifold (6), and the single tube reactor gas outlet (73) and the gas mixing box (8) phase
Even.
In the present invention, the catalyst monomer (711) can be but not limited to cylindrical shape, square shape or
Rectangular shape, preferably cylindrical shape can obtain better catalyst utilization.Further, when the single tube reacts
In device (71) described in installation 2-4 blocks when catalyst monomer (711), between two adjacent catalyst monomers (711) away from
From for 30-100mm.
In the present invention, the distance between two adjacent described catalyst monomers (711) are 30-100mm, in this range
It is interior that gas can be made to carry out preferably secondary mixing, to keep catalyst loading uniform.For the catalyst monomer (711)
For installation, each catalyst monomer (711) is individually encapsulated with a sealing gasket, that is, encapsulates the catalysis with sealing gasket
Agent monomer (711) then encapsulates subsequent catalyst monomer (711) with the interval of 30-100mm.
Further, a diameter of 7.5-30 inches of the cross section of the catalyst monomer (711), and each catalyst
The layer height of monomer (711) is 3-20 inches.
In the present invention, when a diameter of 7.5-30 inches of the cross section of the catalyst monomer (711), and it is each described
When the layer height of catalyst monomer (711) is 3-20 inches, catalyst has excellent catalytic activity, low pressure under high loads
Drop.Depending on specific size specification can be by the treating capacity of VOC exhaust gas and requirement.
Further, it is provided with catalyst between the heater (3) and the catalysis-oxidation reactor and mends cooling system, institute
It states catalyst benefit cooling system to be made of benefit cold air motor-driven valve (V2) and cooling blower (9), the benefit cold air motor-driven valve (V2)
One end be connected with the entrance of the catalysis-oxidation reactor by cooling blower (9), and the benefit cold air motor-driven valve (V2)
The other end communicated with air.
In the present invention, the catalyst is mended cooling system and is arranged in the inlet of the catalysis-oxidation reactor, in order to anti-
Only high temperature, excessively thermally-induced sintering of catalyst, specifically, the catalyst mend cooling system can be located at expansion joint (5) top or
Below person.
Further, it is connected with heat exchanger cold-side inlet between the spark arrester (2) and the cold-side inlet of the heat exchanger (3)
Temperature controller (T30), close to the heat exchanger between the cold side outlet and the heater (4) entrance of the heat exchanger (3)
(3) be connected with heat exchanger cold side outlet temperature controller (T31) at cold side outlet, the cold side outlet of the heat exchanger (3) and
It is connected with calorifier inlets temperature controller (T40) close to the heater (4) inlet between heater (4) entrance,
It is connected with heater outlet temperature controller between heater (4) outlet and the catalysis-oxidation reactor entrance
(T41), the catalysis-oxidation reactor inlet is connected with photocatalyst module inlet temperature controller (T70), and described urges
Change-oxidation reactor exit is connected with photocatalyst module outlet temperature controller (T71).
Further, the catalysed oxidation processes of the efficient process VOCs organic exhaust gas include the following steps：Volatilization will be contained
Property organic compound organic exhaust gas through dry filter (1) for removing the dust in removing exhaust gas and particulate matter；It is useless by removing
The organic exhaust gas after dust and particulate matter in gas enters heat exchanger (3) after spark arrester (2)；Enter heater after heat exchange
(4), when the temperature that heater outlet temperature controller (T41) monitors and calorifier inlets temperature controller (T40) monitor
Temperature difference DELTA T=T41-T40>When preset temperature, the organic exhaust gas after heater (4) heat exchanging is heated；
Organic exhaust gas enters catalysis-oxidation reactor progress catalysis oxidation after heating；Organic exhaust gas after the catalysis oxidation passes through successively
In heat exchanger (3) and smoke stack emission to air.
In the present invention, the opening and closing of the benefit cold air motor-driven valve (V2) and the cooling blower (9) pass through institute
Photocatalyst module inlet temperature controller (T70) is stated to be controlled.The heater outlet temperature controller (T41) is for measuring
The gas temperature of catalysis-oxidation reactor entrance, the calorifier inlets temperature controller (T40) is for measuring heater (4)
The gas temperature of entrance, the heater outlet temperature controller (T41) and the calorifier inlets temperature controller (T40) are altogether
With the operation for controlling heater (4).Gas after heater (4) heating, before entering catalysis-oxidation reactor
It is controlled with the photocatalyst module inlet temperature controller (T70), if the photocatalyst module inlet temperature controller (T70)
The temperature monitored is higher than setting value, then opens the catalyst and mend cooling system.
Device using above-mentioned technical proposal for catalysis-oxidation, purification of VOCs organic exhaust gas, exhaust gas is in succession through heat exchange
Enter catalysis-oxidation reactor after device preheating, heater heating, is effectively utilized catalysis reaction heat, reduces energy consumption；Catalysis-
Oxidation reactor assembles composition side by side using single tube reactor, exhaust gas after gas manifold even into each single tube reactor,
Air-flow, temperature uniformity are optimized, catalyst utilization is improved；Single tube reactor and gas manifold, gas mixing box are logical
Quick change clamp connection is crossed, the installation, maintenance and replacement of catalytic module are facilitated；Single tube reactor size and number can be according to waste gas stream
Amount is freely adjusted, is assembled, it can be achieved that mass makes；Catalyst monomer is encapsulated in using fire resistant seal liner in cylinder, is improved
Single tube reactor leakproofness, avoids the short stream efficiency is caused to reduce.
In conclusion present invention improves catalysis-oxidation reactor structure, reduced while improving device reliability
Energy consumption, ensures the purification efficiency of catalyst utilization and device to exhaust gas, device in the process of running, entrance VOCs organic exhaust gas
A concentration of 0.5-6g/m3, reaction velocity SV=5K-30K h-1, device is to the removal efficiency of VOCs up to 99.5% or more.
Description of the drawings
Fig. 1 is the structural schematic diagram of the catalytic oxidizing equipment of efficient process VOCs organic exhaust gas of the present invention；
Fig. 2 is single tube reactor schematic elevation view in the present invention；
Fig. 3 is the structural schematic diagram of Fig. 2 midship sections；
Fig. 4 is catalyst cylinder cross-sectional view in the present invention.
In Fig. 1 to Fig. 4, parts list represented by the reference numerals are as follows
1, dry filter, 2, spark arrester, 3, heat exchanger, 4, heater, 5, expansion joint, 6, gas manifold, 7, catalysis
Device module, 71, single tube reactor, 711, catalyst, 712, fire resistant seal liner, 713, cylinder, 714, insulating layer, 715, reaction
Device shell, 72, single tube reactor air inlet, 73, single tube reactor exhaust outlet, 8, gas mixing box, 9, mend air-cooler, 10, draw
Wind turbine, 11, chimney, 12, quick change clip
V2, V1, air inlet motor-driven valve mend cold air motor-driven valve, EV1, urgent air bleeding valve, P1, pressure controller
T30, heat exchanger cold-side inlet temperature controller, T31, heat exchanger cold side outlet temperature controller, T40, heater
Inlet temperature controller, T41, heater outlet temperature controller, T70, photocatalyst module inlet temperature controller, T71, catalysis
Device module outlet temperature controller
Specific implementation mode
The principle of the invention and feature are described below in conjunction with drawings and examples, illustrated embodiment is served only for explaining this
Invention, and non-limiting the scope of the present invention.
Fig. 1 is the structural schematic diagram of the catalytic oxidizing equipment of efficient process VOCs organic exhaust gas of the present invention, including dry type mistake
Filter 1, spark arrester 2, heat exchanger 3, heater 4 and catalysis-oxidation reactor, wherein one end of the dry filter 1 passes through
Air inlet motor-driven valve V1 and exhaust gas discharge end or Adsorption Concentration desorption end are connected, and the other end of the dry filter 1 with it is described
Spark arrester 2 is connected；The spark arrester 2 is connected with the cold-side inlet of the heat exchanger 3, the cold side outlet of the heat exchanger 3 and institute
The entrance for stating heater 4 is connected, and the outlet of the heater 4 is connected by expansion joint 5 with the catalysis-oxidation reactor,
Catalysis-the oxidation reactor is connected with the hot-side inlet of the heat exchanger 3, and the hot junction outlet of the heat exchanger 3 is by drawing
Wind turbine 10 is connected with chimney 11.
Wherein, heat exchanger 3 is used to be catalyzed-the recycling of oxidation reaction heat, and for heating preheating, (preheating is heater 4
It is after system operation, the gas after heater 4 heats obtains reaction heat through catalytic oxidation, and heat is recycled using heat exchanger 3
Amount exhaust gas is preheated) after exhaust gas to reach catalyst light-off temperature.Described device entrance is equipped with spark arrester 2, prevents fire
Flame returns and alters initiation safety accident, and dry filter 1 is equipped in spark arrester leading portion, for removing the dust in removing exhaust gas and particulate matter,
It prevents particulate matter from being deposited in equipment, catalyst surface and causes corrosion and blocking.
Catalysis-the oxidation reactor is made of gas manifold 6, photocatalyst module 7 and gas mixing box 8, the gas
The entrance of body distributor box 6 is connected by expansion joint 5 with the outlet of the heater 4, and the outlet of the gas manifold 6 passes through fast
Clip 12 is changed with the entrance of the photocatalyst module 7 to be connected, the outlet of the photocatalyst module 7 by quick change clip 12 with it is described
The entrance of gas mixing box 8 is connected, and the outlet of the gas mixing box 8 is connected with the hot-side inlet of the heat exchanger 3.
Wherein, gas distribution case 6 is connect with the single tube reactor 71 in catalytic module 7 by quick change clip 12, and being used for will
Exhaust gas after heating is uniformly distributed, and exhaust gas improves catalyst utilization even into single tube reactor 71.
The outlet of the photocatalyst module 7 is equipped with gas mixing box 8, is connect, is used for by quick change clip 12 with catalytic module 7
The exhaust gas for collecting the outlet of single tube reactor 71, to improve the heat exchange efficiency of heat exchanger 3.
The photocatalyst module 7 by least one single tube reactor 71 side by side assembling constitute, the single tube reactor 71 by
Catalyst monomer 711, fire resistant seal liner 712, cylinder 713, insulating layer 714 and shell of reactor 715 are constituted, wherein described urge
Agent monomer 711 is mounted in the cylinder 713, has the fire resisting close between the catalyst monomer 711 and the cylinder 713
Envelope liner 712, the insulating layer constituted filled with flame-proof thermal insulation material between the cylinder 713 and the shell of reactor 715
714。
The photocatalyst module 7 by several independent single tube reactors 71 side by side assembling constitute, single tube reactor 71 it is interior
Portion is provided with VOC oxidation catalyst (as using 10.5 cun of x4 cuns of+10.5 cun of x6 cuns of catalyst or 13 cun x6 cuns+2x13 cuns of x4
It is very little), (such as dimethylbenzene is in SV=30000h under certain condition for the VOCs species in exhaust gas-1, a concentration of 6g/m3, 280 DEG C of temperature
When, high conversion rate can be substantially oxidized in 99%), generate H2O and CO2.It will produce big quantitative response in catalysis-oxidation reaction process
Heat only needs a small amount of energy input for heating exhaust gas after the heat exchange of heat exchanger 3 in device operational process.
The single tube reactor 71 is that catalyst monomer 711 is encapsulated in cylinder 713 with fire resistant seal liner 712, cylinder
Insulating layer 714 and shell of reactor 715 are equipped with outside body 713 successively, 1-4 block catalyst monomers are installed in single tube reactor 71
711, a diameter of 7.5-30 inches of catalyst monomer 711, the height of catalyst monomer 711 is 3-20 inches.
The photocatalyst module 7 is additionally provided with pressure controller P1 and urgent air bleeding valve EV1, prevents from reacting too fast and causing to urge
Change pressure rise in device module.
It is provided with catalyst between the heater 3 and the catalysis-oxidation reactor and mends cooling system, the catalyst is mended
Cooling system is made of benefit cold air motor-driven valve V2 and cooling blower 9, and described one end for mending cold air motor-driven valve V2 passes through cooling wind
Machine 9 is connected with the entrance of the catalysis-oxidation reactor, and the other end for mending cold air motor-driven valve V2 is communicated with air.
It is equipped between the expansion joint 5 and catalysis-oxidation reactor entrance and mends air-cooler 9 and mend cold solenoid valve V2, for regulating and controlling to enter
The temperature of the gas of photocatalyst module 7 prevents temperature excessively high and is damaged to catalyst.
The cold-side inlet and cold side outlet of the heat exchanger 3 are respectively equipped with temperature controller T30 and T31, and heater 4 enters
Mouth and outlet are respectively equipped with temperature controller T40 and T41, and the entrance and exit of photocatalyst module 7 is respectively equipped with temperature controller
T70 and T71 is respectively used to the temperature of control device unit entrance and exit, to maintain the exhaust gas parameters of unit.
Heat exchanger cold-side inlet temperature controller is connected between the spark arrester 2 and the cold-side inlet of the heat exchanger 3
T30 is connected at the cold side outlet of the heat exchanger 3 between 4 entrance of the cold side outlet of the heat exchanger 3 and the heater
There is a heat exchanger cold side outlet temperature controller T31, it is close between 4 entrance of the cold side outlet of the heat exchanger 3 and the heater
4 inlet of the heater is connected with calorifier inlets temperature controller T40, the outlet of the heater 4 and the catalysis-oxidation
Heater outlet temperature controller T41 is connected between reactor inlet, the catalysis-oxidation reactor inlet is connected with and urges
Change device module inlet temperature controller T70, and the catalysis-oxidation reactor exit is connected with photocatalyst module outlet temperature
Controller T71.
The catalysed oxidation processes of efficient process VOCs organic exhaust gas of the present invention include the following steps：It is organic volatility will to be contained
The organic exhaust gas of compound is through dry filter 1 for removing the dust in removing exhaust gas and particulate matter；By removing the powder in removing exhaust gas
Organic exhaust gas after dirt and particulate matter enters heat exchanger 3 after spark arrester 2；Enter heater 4 after heat exchange, works as heater outlet
The difference DELTA T=T41- of the temperature that temperature controller T41 is monitored and the calorifier inlets temperature controller T40 temperature monitored
T40>When preset temperature (occurrence of preset temperature depends on different catalytic oxidation conditions), heater 4 is exchanged
Organic exhaust gas after heat is heated；Gas manifold of the expanded section 5 of organic exhaust gas into catalysis-oxidation reactor after heating
6, it is discharged through gas mixing box 8 subsequently into after the progress catalysis oxidation of photocatalyst module 7；Gas after discharge is successively through heat exchanger
3 and smoke stack emission to air in.Wherein, the temperature that the photocatalyst module inlet temperature controller T70 is monitored is set<400
DEG C, and set the temperature that the photocatalyst module outlet temperature controller T71 is monitored<600 DEG C, when the temperature that T70 is monitored>
The 400 DEG C or T71 temperature monitored>At 600 DEG C, opens catalyst and mends cooling system, while reducing the output power of heater 4,
Wherein when the temperature that heat exchanger cold-side inlet temperature controller T30 is monitored>(occurrence of preset temperature depends on preset temperature
Different catalytic oxidation conditions) when, increase the rotating speed of air-introduced machine 10, when heat exchanger cold side outlet temperature controller T31 is supervised
The temperature measured<When the temperature that calorifier inlets temperature controller T40 is monitored, the T40 controls of calorifier inlets temperature controller
The operation of heater 4, when the temperature that heat exchanger cold side outlet temperature controller T31 is monitored>Calorifier inlets temperature controller
When the temperature that T40 is monitored, the operation of heat exchanger cold side outlet temperature controller T31 control heaters 4.
After above-mentioned heat exchange, heating, catalysis-oxidation process, main VOCs organic pollutions obtain thoroughly organic exhaust gas
It decomposes, clean gas is discharged into air.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of catalytic oxidizing equipment of efficient process VOCs organic exhaust gas, which is characterized in that including dry filter (1), resistance
Firearm (2), heat exchanger (3), heater (4) and catalysis-oxidation reactor, wherein
The dry filter (1) is connected with the spark arrester (2), and the spark arrester (2) and the cold end of the heat exchanger (3) enter
Mouth is connected, and the cold side outlet of the heat exchanger (3) is connected with the heater (4), the heater (4) and the catalysis-oxygen
Change reactor to be connected, the catalysis-oxidation reactor is connected with the hot-side inlet of the heat exchanger (3), and the heat exchanger (3)
Hot junction outlet be connected with chimney (11).
2. the catalytic oxidizing equipment of efficient process VOCs organic exhaust gas according to claim 1, which is characterized in that described dry
One end of formula filter (1) is desorbed end with exhaust gas discharge end or Adsorption Concentration by air inlet motor-driven valve (V1) and is connected, and described dry
The other end of formula filter (1) is connected with the spark arrester (2)；The cold side outlet of the heat exchanger (3) and the heater (4)
Entrance be connected, and the outlet of the heater (4) is connected by expansion joint (5) with the catalysis-oxidation reactor；It is described to change
The hot junction outlet of hot device (3) is connected by air-introduced machine (10) with chimney (11).
3. the catalytic oxidizing equipment of efficient process VOCs organic exhaust gas according to claim 1, which is characterized in that described to urge
Change-oxidation reactor is made of gas manifold (6), photocatalyst module (7) and gas mixing box (8), the gas manifold
(6) entrance is connected by expansion joint (5) with the outlet of the heater (4), and the outlet of the gas manifold (6) passes through fast
It changes clip (12) with the entrance of the photocatalyst module (7) to be connected, the outlet of the photocatalyst module (7) passes through quick change clip
(12) it is connected with the entrance of the gas mixing box (8), and the outlet of the gas mixing box (8) and the heat exchanger (3)
Hot-side inlet is connected.
4. the catalytic oxidizing equipment of efficient process VOCs organic exhaust gas according to claim 3, which is characterized in that the gas
Urgent air bleeding valve (EV1) and pressure controller (P1) are connected on body distributor box (6), the photocatalyst module (7) is by least one
Assembling is constituted a single tube reactor (71) side by side, and the single tube reactor (71) is padded by catalyst monomer (711), fire resistant seal
(712), cylinder (713), insulating layer (714) and shell of reactor (715) are constituted, wherein the catalyst monomer (711) is installed
In the cylinder (713), there is the fire resistant seal to pad between the catalyst monomer (711) and the cylinder (713)
(712), the insulating layer constituted filled with flame-proof thermal insulation material between the cylinder (713) and the shell of reactor (715)
(714)。
5. the catalytic oxidizing equipment of efficient process VOCs organic exhaust gas according to claim 4, which is characterized in that the list
Catalyst monomer (711) described in installation 1-4 blocks in pipe reactor (71), and the single tube reactor (71) has single tube reactor
Air inlet (72) and single tube reactor gas outlet (73), wherein the single tube reactor air inlet (72) and the gas manifold
(6) it is connected, and the single tube reactor gas outlet (73) is connected with the gas mixing box (8).
6. the catalytic oxidizing equipment of efficient process VOCs organic exhaust gas according to claim 5, which is characterized in that when described
In single tube reactor (71) described in installation 2-4 blocks when catalyst monomer (711), two adjacent catalyst monomers (711)
The distance between be 30-100mm.
7. the catalytic oxidizing equipment of efficient process VOCs organic exhaust gas according to claim 4 or 5, which is characterized in that institute
State the cross section of catalyst monomer (711) a diameter of 7.5-30 inches, and the layer height of each catalyst monomer (711)
It is 3-20 inches.
8. the catalytic oxidizing equipment of efficient process VOCs organic exhaust gas according to claim 1, which is characterized in that described to add
It is provided with catalyst between hot device (3) and the catalysis-oxidation reactor and mends cooling system, it is cold by mending that the catalyst mends cooling system
Air motor-driven valve (V2) and cooling blower (9) are constituted, described one end for mending cold air motor-driven valve (V2) by cooling blower (9) with
The entrance of the catalysis-oxidation reactor is connected, and the other end for mending cold air motor-driven valve (V2) is communicated with air.
9. the catalytic oxidizing equipment of efficient process VOCs organic exhaust gas according to claim 1, which is characterized in that the resistance
Heat exchanger cold-side inlet temperature controller (T30) is connected between firearm (2) and the cold-side inlet of the heat exchanger (3), it is described
It is connected at the cold side outlet of the heat exchanger (3) between the cold side outlet and the heater (4) entrance of heat exchanger (3)
Heat exchanger cold side outlet temperature controller (T31), between the cold side outlet and the heater (4) entrance of the heat exchanger (3)
It is connected with calorifier inlets temperature controller (T40), heater (4) outlet and institute close to the heater (4) inlet
It states and is connected with heater outlet temperature controller (T41), the catalysis-oxidation reactor between catalysis-oxidation reactor entrance
Inlet is connected with photocatalyst module inlet temperature controller (T70), and the catalysis-oxidation reactor exit is connected with and urges
Change device module outlet temperature controller (T71).
10. a kind of catalysed oxidation processes of efficient process VOCs organic exhaust gas, which is characterized in that include the following steps：It will contain
The organic exhaust gas of volatile organic compounds is through dry filter (1) for removing the dust in removing exhaust gas and particulate matter；Through the past
The organic exhaust gas after dust and particulate matter in removing exhaust gas enters heat exchanger (3) after spark arrester (2)；Enter heating after heat exchange
Device (4), when the temperature that heater outlet temperature controller (T41) monitors and calorifier inlets temperature controller (T40) monitor
The difference DELTA T=T41-T40 of the temperature arrived>When preset temperature, the organic exhaust gas after heater (4) heat exchanging is added
Heat；Organic exhaust gas enters catalysis-oxidation reactor progress catalysis oxidation after heating；Organic exhaust gas after the catalysis oxidation is successively
Through in heat exchanger (3) and smoke stack emission to air.
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| CN108371876B (en) | 2024-03-22 |
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