CN108826323A - A kind of catalysis burning waste gas processing system for medium and small air quantity - Google Patents
A kind of catalysis burning waste gas processing system for medium and small air quantity Download PDFInfo
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- CN108826323A CN108826323A CN201810604309.XA CN201810604309A CN108826323A CN 108826323 A CN108826323 A CN 108826323A CN 201810604309 A CN201810604309 A CN 201810604309A CN 108826323 A CN108826323 A CN 108826323A
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- 238000006555 catalytic reaction Methods 0.000 title claims abstract description 62
- 239000002912 waste gas Substances 0.000 title claims abstract description 23
- 238000012545 processing Methods 0.000 title claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 37
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 31
- 230000003647 oxidation Effects 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
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- 238000001816 cooling Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 50
- 239000003054 catalyst Substances 0.000 claims description 33
- 238000004880 explosion Methods 0.000 claims description 16
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- 239000010935 stainless steel Substances 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
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- 239000010962 carbon steel Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 229910018487 Ni—Cr Inorganic materials 0.000 claims 1
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- 235000019504 cigarettes Nutrition 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000013500 data storage Methods 0.000 abstract description 3
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- 238000000034 method Methods 0.000 description 22
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- 238000009841 combustion method Methods 0.000 description 4
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- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
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- 239000004215 Carbon black (E152) Substances 0.000 description 2
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
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- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
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- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- 229910052718 tin Inorganic materials 0.000 description 1
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- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/50—Control or safety arrangements
-
- 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
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
- F23G7/063—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating electric heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2202/00—Combustion
- F23G2202/10—Combustion in two or more stages
- F23G2202/102—Combustion in two or more stages with supplementary heating
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2207/00—Control
- F23G2207/30—Oxidant supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2208/00—Safety aspects
- F23G2208/10—Preventing or abating fire or explosion, e.g. by purging
Abstract
The invention discloses a kind of catalysis burning waste gas processing systems for medium and small air quantity, the system is successively arranged dry filter from left to right, admission line, heat exchange type catalysis oxidation all-in-one machine, outlet pipe, air-introduced machine and chimney, air intake valve is equipped in the inlet port of the heat exchange type catalysis oxidation all-in-one machine, safety control system is equipped between the air intake valve and the dry filter, the safety control system also with mend cooling system, it is connected with bypath system, dump system is equipped on the heat exchange type catalysis oxidation all-in-one machine, the exposed electrical of entire exhaust treatment system connects PLC control cabinet.The system power is low, energy consumption is small, meets all kinds of complex working conditions, by increasing safety control system in systems, mend cold dilution system, complete monitoring and data storage are carried out to the gentle pressure of combustion process temperature and heating power is voluntarily adjusted according to combustion state, greatly improves the safety and stability of system operation.
Description
Technical field
The present invention relates to waste gas treatment equipment fields, at a kind of catalysis burning waste gas for medium and small air quantity
Reason system.
Background technique
Currently, industry VOCs waste gas pollution control and treatment industry is broadly divided into for the processing mode of exhaust emission component：It destroys and returns
It receives.And for non-recovery value in exhaust gas, the higher operating condition of exhaust gas concentration mostly uses greatly combustion method to be handled, combustion method master
It is divided into：It burns and catalysis is burnt.Catalysis burning is typical gas-solid phase catalytic reaction, it is reacted by catalyst degradation
Activation energy, so that it is carried out flameless combustion at 250 DEG C~430 DEG C of lower initiation temperature, organic substance oxidation occurs solid
Body catalyst surface, while generating CO2And H2O, and a large amount of heat is released, because its oxidizing reaction temperature is low, so greatly pressing down
The N in air is made2Form high temperature NOx.And due to the selective catalytic action of catalyst, it is possible to limit nitrogenous in fuel
Compound（RNH）Oxidation process, make its majority formed dinitrogens（N2）.Compared with traditional flame combustion, catalysis burning has
Following characteristics:（1）Initiation temperature is low, less energy consumption, flameholding, or even can complete to after initiation temperature without ambient heat
Oxidation reaction；（2）Purification efficiency is high, pollutant（NOx and imperfect combustion product etc.）Emission level it is lower；（3）Adapt to oxygen
Concentration range is big, without secondary pollution, and burns and mitigate, and running expense is low, and operational administrative is also very convenient.
Currently, being directed in the industrial processes such as petrochemical industry, paint, plating, printing, coating, Tire production
Machine volatile compound using and discharging.Harmful organic volatile is usually hydrocarbon compound, oxygen-containing organic in every profession and trade
Object etc. is closed, these volatile organic matters, which are such as directly discharged into atmosphere without processing, will cause serious environmental pollution.Traditional is organic
Method for purifying and processing waste gas mainly includes absorption method, condensation method and direct combustion method.Absorption method mainly utilizes adsorbent material pair
Pollutant in exhaust gas carries out Adsorption Concentration and achievees the purpose that purify exhaust gas, but adsorbent material（Such as active carbon, molecular sieve）
Once adsorption saturation is replaced or regenerated, there is certain service life, the dangerous waste problem that adsorbent material generates is always
It is the main reason for limitation absorbing process is widely applied.Condensation process primarily directed to small air quantity high concentration one-component substance into
Row recycles, but in practical exhaust gas pollution components at most reachable tens hundreds of, and a large amount of particles are generally accompanied in exhaust gas
Object（Such as coating cloud, ink）, recycling solution needs be further processed, often solvent after the recovery is unable to satisfy actual industrial and wants
It asks.It includes that the components such as natural gas, diesel oil are directly fired at 760 ~ 1000 DEG C that direct combustion method, which mainly passes through addition combustion adjuvant,
It burns, but higher cost of burning, emission are easy to produce the secondary pollutions such as NOx, sulfide, bioxin, need to carry out into one
Step processing.All there is secondary pollution in these methods.
It is useless that small air quantity industry VOCs is also administered using treatment process such as low temperature plasma, photocatalysis in the prior art
Gas, but with the continuous improvement of waste gas emission standard, such technique has been unable to satisfy corresponding environmental requirement, such as《Atmosphere pollution
Comprehensive discharge standard》It is required that non-methane hydrocarbon emission concentration≤120 mg/m3, but professional standard or regional standard require non-methane
Total hydrocarbon emissions concentration≤80 mg/m3。
Production by Catalytic Combustion Process because have the characteristics that burning it is at low cost, safety coefficient is high, occupied area is small, installation and repairing it is convenient by
To the extensive concern of waste gas pollution control and treatment industry.Integral type catalytic combustion system is mostly used, in the market with Chinese patent
For 201621360706.X, which disclose a kind of heat exchange type catalytic oxidizing equipment, including device noumenon, device noumenon bottoms
Side is held to connect inlet tube, the bottom end other side connects air-introduced machine and discharge pipe；It include upper and lower two layers of frame body inside device noumenon,
Lower layer's frame body is equipped with preheating electric heating tube, metal plate type heat exchanger, and inlet tube is connect with preheating electric heating tube, preheats electrothermal tube
Metal plate type heat exchanger is installed in side, and metal plate type heat exchanger is equipped with inlet channel, rectangular channel and outlet passageway；Upper layer frame body
Be equipped with noble metal ceramic honey comb and electrothermal tube, noble metal ceramic honey comb be set to metal plate type heat exchanger rectangular channel just on
Side, electrothermal tube are set to right above noble metal ceramic honey comb.For the device in the presence of structure is complicated, heating tube is unevenly distributed, exhaust gas is empty
The defects of bed flow velocity is too fast and catalytic effect is unobvious.And the not set benefit cooling system of the device, when exhaust gas concentration is higher, if
It is standby even to explode once bearing incessantly instantaneous thermal shock and will cause security risk.
Therefore, it is necessary to make improvement and optimization to the structure of existing catalytic combustion system, guaranteeing to be catalyzed burning effect
Enhance the heat hardiness impact capacity of system while rate, and combustion process can be monitored in real time, improves the peace of system entirety
Full property and stability.
Summary of the invention
In view of the above problems, the present invention is intended to provide a kind of VOCs treatment system for small air quantity, is somebody's turn to do
System carries out the processing of exhaust gas by the way of catalysis burning, is changed using plate heat exchanger the tail gas after burning in system
Heat has greatly saved the cost of burning；The system power is low, energy consumption is small, meets all kinds of complex working conditions, by system
Middle increase safety control system, mends cold dilution system, to the gentle pressure of combustion process temperature carry out complete monitoring and data storage with
And heating power is voluntarily adjusted according to combustion state, greatly improve the safety and stability of system operation.
To achieve the goals above, the technical solution adopted in the present invention is as follows：A kind of catalysis combustion for medium and small air quantity
Exhaust treatment system is burnt, which is successively arranged dry filter, admission line, heat exchange type catalysis oxidation one from left to right
Machine, outlet pipe, air-introduced machine and chimney are equipped with air intake valve in the inlet port of the heat exchange type catalysis oxidation all-in-one machine,
Safety control system is equipped between the air intake valve and the dry filter, the safety control system includes being located at close to institute
The fire arrester one of dry filter one end is stated, the venting of dust explosion piece on one right side of fire arrester is located at and is located at the air intake valve front end
Explosive gas survey meter, between the fire arrester one and the venting of dust explosion piece be equipped with mend cooling system, in the venting of dust explosion piece and institute
It states and is equipped with bypath system between explosive gas survey meter, dump system is equipped on the heat exchange type catalysis oxidation all-in-one machine
The exposed electrical of system, entire exhaust treatment system connects PLC control cabinet.
Further, the bypath system includes bypass line and the activated carbon adsorption that is connected on the bypass line
Case, the admission line between one end of the bypass line and the venting of dust explosion piece and the explosive gas survey meter is connected to,
The other end is connected to the outlet pipe, on the bypass line close to the admission line one end be equipped with bypath valve,
Fire arrester two is equipped with close to one end of the outlet pipe.
Further, the benefit cooling system includes mending cold dilution air and being located at cold with the benefit of the admission line interface
Dilute valve.
Further, the heat exchange type catalysis oxidation all-in-one machine is divided into upper layer and lower layer region, is equipped in lower region board-like
Heat exchanger is separated between top area and lower region with partition, and inlet channel is provided on the partition, and top area is divided again
For two regions in left and right, right area is combustion chamber, and left area is catalyst chamber, is equipped with air inlet in the left bottom of lower region
Mouth, bottom right side are equipped with gas outlet, are equipped with dump mouth in the right hand top of top area.
Further, U-shaped electric heating tube is equipped in the combustion chamber, the electric heating tube is made of stainless steel, electricity
Resistance silk is nickel filament, is connect by electric cabinet with external circuitry.
Further, it is equipped with one stage catalyzing burning bed in the catalyst chamber and second level is catalyzed burning bed, in the level-one
It is catalyzed between burning bed and second level catalysis burning bed and is equipped with compensation heating zone, compensation heating is equipped in the compensation heating zone
Pipe, the one stage catalyzing burning bed and second level catalysis burning bed are made of multiple beds, and bed, which uses, piles up formula mode
It places, ceramic base and metal base monolithic honeycomb catalyst is equipped in bed, is separated between every layer of bed with stainless steel cloth,
It is respectively equipped with grid in the bottom of the one stage catalyzing burning bed and second level catalysis burning bed, in the left side of the catalyst chamber
Equipped with maintenance door.
Further, in the import of the combustion chamber, the import of the catalyst chamber, the one stage catalyzing burning bed location
Domain, it is described compensation heating zone, the second level catalysis burning bed region, the heat exchange type catalysis oxidation all-in-one machine import and
Outlet end is respectively equipped with temperature sensor, and pressure sensor one is equipped at the top of the catalyst chamber.
Further, the dump system includes the dump pipeline being connected to the dump mouth, described
Dump valve, the other end and the bypass line are equipped with close to one end of the dump mouth on dump pipeline
Exit is connected, and pressure sensor two is equipped on the dump pipeline.
Further, the shell of the heat exchange type catalysis oxidation all-in-one machine is made of carbon steel sheet, and liner is by stainless steel plate system
At equipped with the silicate heat-preservation cotton layer of 150 mm between the shell and the liner.
Further, manual modulation valve is equipped in the input end of the air-introduced machine.
The beneficial effects of the invention are as follows：
（1）Bypath system is increased, the treatment effeciency of exhaust is improved, increases the stability and safety of system operation；
（2）Safety control system is increased, the safety of system is greatly improved, system is monitored burning whole process, and one
Denier system breaks down, and system carries out alarm and state adjustment automatically；
（3）Catalytic combustion zone is divided into one stage catalyzing burning bed, secondary firing bed and the compensation part of heating zone three, optimizes and urges
Change combustion process, improves the efficiency of combustion of exhaust gas；
（4）Plate heat exchanger and electric heating tube are used in heat exchange type catalysis oxidation all-in-one machine, by plate heat exchanger by high temperature
Combustion tail gas and air inlet carry out heat exchange, have greatly saved energy consumption, burning is electrically heated by the way of power adjustable section,
Intelligent control is carried out according to chamber temperature, the temperature constant state of combustion chamber is kept with minimum heating power；
（5）Dump system is increased, once ignition temperature reaches system limits, system automatically opens dump pipeline,
Combustion chamber waste heat is discharged, to maintain the thermodynamic equilibrium of system；
（6）Heat exchange type catalysis oxidation all-in-one machine uses multilayered structure, is divided into shell, insulating layer, liner, reduces scattering and disappearing for heat,
Suitable for various adverse circumstances；
（7）This be applicable in new structure concentrate, occupied area it is small, stable, by PLC electric control cabinet control system operational process,
The storage of complete monitoring data.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of the catalysis burning waste gas processing system for medium and small air quantity of the present invention；
Fig. 2 is a kind of heat exchange type catalysis oxidation all-in-one machine of the catalysis burning waste gas processing system for medium and small air quantity of the present invention
Schematic diagram of internal structure.
1- dry filter, 2- admission line, 3- heat exchange type catalysis oxidation all-in-one machine, 4- outlet pipe, 5- air-introduced machine, 6-
Chimney, 7- air intake valve, 8- safety control system, 9- fire arrester one, 10- venting of dust explosion piece, 11- explosive gas survey meter, 12- are mended
Cooling system, 13- bypath system, 14- dump system, 15-PLC electric cabinet, 16- bypass line, 17- activated carbon adsorption case,
18- bypass valve, 19- fire arrester two, 20- mend cold dilution air, and 21- mends cold dilution valve, 22- plate heat exchanger, 23- every
Plate, 24- inlet channel, the combustion chamber 25-, 26- catalyst chamber, 27- air inlet, the gas outlet 28-, 29- dump mouth, 30- electricity add
Heat pipe, 31- electric cabinet, the one stage catalyzing burning bed of 32-, 33- second level are catalyzed burning bed, and 34- compensates heating zone, 35- compensation heating
Pipe, 36- grid, 37- maintenance door, 38- temperature sensor, 39- pressure sensor one, 40- dump valve, 41- are promptly arranged
Put pipeline, 42- pressure sensor two, 43- shell, 44- liner, 45- silicate heat-preservation cotton layer, 46- manual modulation valve.
Specific embodiment
In order to make those skilled in the art be better understood on technical solution of the present invention, 1- with reference to the accompanying drawing
2 and embodiment technical solution of the present invention is further described.
It should be noted that embodiment provided by the present invention is merely to this carries out effectively the technical characteristic of invention
Illustrate, the left side, right side, upper end, lower end etc. position word merely to preferably being described to the embodiment of the present invention, no
It can regard the limitation to technical solution of the present invention as.
The present invention is directed to industrial air quantity in 500m3/h~20000m3The VOCs treatment industry of/h, especially in exhaust gas not
The waste treatment system that can make the substance of catalyst poisoning containing chlorine, phosphorus, arsenic, sulphur and mercury, tin, zinc etc., proposes a kind of use
In the catalysis burning waste gas processing system of medium and small air quantity, the system primarily to solve in the prior art using UV photocatalysis and
Low temperature plasma processes are unable to satisfy the height of operating cost existing for the discharge standard being increasingly stringenter and incineration method, safety system
The problems such as number is low.Most of organic compound can be carried out catalysis burning, final oxidizing fire by the system under low-temperature condition
At CO2And H2O realizes the ultra-clean discharge of exhaust gas.
The system is successively arranged dry filter 1 from left to right, admission line 2, heat exchange type catalysis oxidation all-in-one machine 3, goes out
Feed channel 4, air-introduced machine 5 and chimney 6 are equipped with air intake valve 7 in the inlet port of the heat exchange type catalysis oxidation all-in-one machine 3,
Safety control system 8 is equipped between the air intake valve 7 and the dry filter 1, the safety control system 8 includes being located to lean on
The fire arrester 1 of nearly described 1 one end of dry filter, the venting of dust explosion piece 10 for being located at one 9 right side of fire arrester and be located at it is described into
The explosive gas survey meter 11 of 7 front end of air valve is equipped between the fire arrester 1 and the venting of dust explosion piece 10 and mends cooling system
12, it is equipped with bypath system 13 between the venting of dust explosion piece 10 and the explosive gas survey meter 11, is catalyzed oxygen in the heat exchange type
Change all-in-one machine 3 and be equipped with dump system 14, the exposed electrical of entire exhaust treatment system connects PLC control cabinet 15, in institute
The input end for stating air-introduced machine 5 is equipped with manual modulation valve 46.
The fire arrester 1 can prevent the generation of tempering, and the explosive gas survey meter 11 is for detecting in exhaust gas
The C contained4Following flammable explosive gas, when inlet gas concentration is more than 25% LEL, the device automatic prompt, the benefit cooling system
12 be actuated for automatically dilution mend it is cold, it is ensured that the safety for being catalyzed burning carries out, and the setting of the venting of dust explosion piece 10 is primarily to anti-
Locking system pressure explodes suddenly, and when system has the possibility of explosion, which being capable of automatic venting of dust explosion.
The bypath system 13 includes bypass line 16 and the activated carbon adsorption case 17 being connected on the bypass line 16,
The admission line 2 between one end of the bypass line 16 and the venting of dust explosion piece 10 and the explosive gas survey meter 11 connects
The logical, other end is connected to the outlet pipe 4, is equipped with side close to one end of the admission line 2 on the bypass line 16
Port valve door 18 is equipped with fire arrester 2 19 close to one end of the outlet pipe 4.
The benefit cooling system 12 includes mending cold dilution air 20 and being located at the cold dilution of benefit with 2 interface of admission line
Valve 21.
The shell 43 of the heat exchange type catalysis oxidation all-in-one machine 3 is made of carbon steel sheet, and liner 44 is made of stainless steel plate,
The silicate heat-preservation cotton layer 45 of 150 mm is equipped between the shell 43 and the liner 44；The heat exchange type catalysis oxidation all-in-one machine
3 points are upper layer and lower layer region, plate heat exchanger 22 are equipped in lower region, the plate heat exchanger 22 uses stainless steel material system
At a kind of, mainly high-performance heat exchanger as made of the sheet metal closed assembly of certain corrugated shape, heat exchange efficiency 65% or more, on
23 are separated with partition between layer region and lower region, is provided with inlet channel 24 on the partition 23, top area is divided into again
Left and right two regions, right area be combustion chamber 25, left area be catalyst chamber 26, lower region left bottom be equipped with into
Port 27, bottom right side are equipped with gas outlet 28, are equipped with dump mouth 29 in the right hand top of top area.
U-shaped electric heating tube 30 is equipped in the combustion chamber 25, the electric heating tube 30 is made of stainless steel, resistance wire
It for nickel filament, is connect by electric cabinet 31 with external circuitry, can be brought rapidly up by electric heating to 550-600 DEG C.
It is equipped with one stage catalyzing burning bed 32 in the catalyst chamber 26 and second level is catalyzed burning bed 33, described one stage catalyzing
It is equipped with compensation heating zone 34 between burning bed 32 and second level catalysis burning bed 33, compensation heating is equipped in the compensation heating zone 34
Pipe 35 carries out heat compensation, the one stage catalyzing burning bed 32 and second level catalysis when temperature drops to 250 DEG C or less automatically
Burning bed 33 is made of multiple beds, and bed use is piled up formula mode and placed, and ceramic base and Metal Substrate are equipped in bed
Integral honeycombed catalyst is separated with stainless steel cloth between every layer of bed, is catalyzed in the one stage catalyzing burning bed 32 and second level
The bottom of burning bed 33 is respectively equipped with grid 36, and catalyst can be carried out more by being equipped with maintenance door 37 in the left side of the catalyst chamber 26
It changes.
In the import of the combustion chamber 25, import of the catalyst chamber 26, one stage catalyzing 32 region of burning bed, described
Compensate heating zone 34, the second level is catalyzed the inlet and outlet in 33 region of burning bed, the heat exchange type catalysis oxidation all-in-one machine 3
It is respectively equipped with temperature sensor 28, pressure sensor 1 is equipped at the top of the catalyst chamber 26.
The dump system 14 includes the dump pipeline 41 being connected to the dump mouth 29, described urgent
Dump valve 40, the other end and the bypass line are equipped with close to one end of the dump mouth 29 on discharge pipe 41
16 exit is connected, and pressure sensor 2 42, the dump valve 40 are equipped on the dump pipeline 41
Setting mainly to prevent in combustion chamber 25 described in combustion process temperature to occur unusual, pressure and temperature reaches the critical of system
Point, when can not be effectively reduced by mending cold dilution, the dump valve 40 is automatically opened high temperature in the combustion chamber 25
Gas is discharged in time.
Specifically implementation steps are：When system is opened, progress combustion chamber 25 first is preheated, and electric heating system starts automatically,
25 temperature of combustion chamber rises, and when temperature rises to 500 DEG C, system air intake valve 7 is opened, and the air-introduced machine 5 starts.
Exhaust gas first passes around the dry filter 1 and is pre-processed, and removes particulate matter and drop in removing exhaust gas.Pass through institute
State admission line 2 enter the fire arrester 1, by the open and close of the air intake valve 7 and the bypath valve 18 come
Adjust the trend of exhaust gas.When the air intake valve 7 is opened, the bypath valve 18 is closed, when the bypath valve 18 is opened,
The air intake valve 7 is closed.When air inlet is by heat exchange type catalysis burning all-in-one machine 3, the heat exchange preheating of progress exhaust gas first
Process, exhaust gas is heated into the combustion chamber 25 after heat exchange, keeps heating temperature constant at 350 DEG C ~ 500 DEG C, when temperature is long
Between when keeping constant, the 30 power adjust automatically of electric heating tube is even switched off, and exhaust gas enters behind the combustion chamber 25
The catalyst chamber 26 first passes around the one stage catalyzing burning bed 32 and carries out catalysis burning, then goes through the second level catalysis
Burning bed 33 carries out second level catalysis burning, and when catalytic bed temperature drops to 250 DEG C or less, the compensation heating tube 35 opens automatically
Dynamic heat temperature raising, keeps 26 temperature of catalyst chamber at 250 DEG C or more.When exhaust gas concentration is higher, 26 temperature of catalyst chamber is held
It is continuous to rise to 450 DEG C, it is described to mend cold dilution valve 21, mend the cold automatic opening of dilution air 20, mend cold dilution, described in reduction
26 temperature of catalyst chamber.
When 26 constant temperature of catalyst chamber rises to 500 DEG C or more, the emergency vent valve 40, which is opened, carries out height
Temperature exhaust.350 DEG C are dropped to temperature, the emergency vent valve 40 is automatically closed.Catalytic bed air speed is 12000 h-1, catalysis
Combustion chamber residence time 0.2 s ~ 0.5 s.Catalyst bed layer height be the mm of 150 mm ~ 300, catalyst module having a size of：100
Mm*100 mm*50 mm, using ceramic base and metal base monolithic honeycomb catalyst, Pd containing heavy metal, Pt.
Equipment installation the temperature sensor 28, pressure sensor 1 and pressure sensor 2 42 can to exhaust gas into
Gas is monitored to exhaust whole process temperature, and temperature range is 0 ~ 800 DEG C.It is catalyzed exhaust gases after combustion and passes through heat exchanger and air inlet
It exchanges heat, exhaust gas is vented directly to the chimney 6 after heat exchange.
Catalysis ignition temperature in the heat exchange type catalysis oxidation all-in-one machine 3 of the system can be purified at 250 ~ 430 DEG C
Majority of organic pollutants in exhaust gas, such as benzene homologues, alcohols, aldehydes, esters, alkane, alkene.System oxidation reaction temperature
Spend it is low, so greatly inhibiting the N in air2Form high temperature NOx.And due to the selective catalytic action of catalyst, having can
The oxidation process that nitrogenous compound in fuel (RNH) can be limited makes its majority form dinitrogen (N2), treatment process is more in line with
Environmental protection standard.
In line pipeline opening when catalytic combustion system carries out maintenance or air inlet exception, the air intake valve 7 is closed, described
Bypass valve 18 is opened, and exhaust gas enters in the activated carbon adsorption case 17 by the bypass line 16, then in the air inducing
It is discharged under the action of machine 5 by the chimney 6.
The manual modulation valve 46 is kept to open, the air-introduced machine 5 carries out the tune of frequency by the PLC control cabinet 15
It is whole.The PLC control cabinet 15 carries out control and data storage to whole flow process, once device fails, system automatic alarm
And show failure generating region.When temperature anomaly, inlet condition exception, operating status exception occur for catalytic combustion device, equipment is certainly
Dynamic to stop heating, the air intake valve 7 is automatically closed, and the bypath valve 18 is opened.When system is shut down, heating stops
Only, 5 frequency of the air-introduced machine decline, the cold dilution air 20 of benefit pass through supplements cold and carry out combustion chamber cooling.
System disclosed in the utility model improves in current conventional use of catalytic combustion system, increases bypass system
System, improves the stability and safety of system.And the adjustment that hot type catalysis oxidation all-in-one machine carries out structure is exchanged, burning is urged
It is divided into the area Liang Ge, compensation heating zone is increased, greatly optimizes catalyticing combustion process and improving combustion efficiency.The invention energy
It is enough that effectively low-concentration organic exhaust gas in small air quantity and the exhaust gas under complex working conditions are effectively administered, and do not generate two
The problems such as secondary pollution.Purification efficiency reaches as high as 98% or more.The technology have it is safe and reliable to operation, automation degree of equipment is high,
The advantages such as burning is thorough, energy consumption is low with respect to burning process are widely used in small-sized paint industry, printing industry, coating industry, half
Conductor industry, chemical industry, pigment industry, food service industry, biofermentation industry, coking industry etc., treated, and exhaust gas is complete
It can satisfy country and industry or regional waste gas emission standard.The improvement work that currently used treatment effeciency is not high can be replaced
Skill administers market to current VOCs and plays standardization role, has stronger reality for small air quantity VOCs treatment industry
Meaning.
Basic principles and main features and advantage of the invention have been shown and described above.But the foregoing is merely this hairs
Bright specific embodiment, technical characteristic of the invention are not limited thereto, and any those skilled in the art is not departing from this hair
The other embodiments obtained under bright technical solution should all cover within the scope of the patent of the present invention.
Claims (10)
1. a kind of catalysis burning waste gas processing system for medium and small air quantity, which is characterized in that the system is successively set from left to right
There is dry filter（1）, admission line（2）, heat exchange type catalysis oxidation all-in-one machine（3）, outlet pipe（4）, air-introduced machine（5）And cigarette
Cylinder（6）, in the heat exchange type catalysis oxidation all-in-one machine（3）Inlet port be equipped with air intake valve（7）, in the air intake valve
（7）With the dry filter（1）Between be equipped with safety control system（8）, the safety control system（8）Including being located at close to institute
State dry filter（1）The fire arrester one of one end（9）, be located at the fire arrester one（9）The venting of dust explosion piece on right side（10）Be located at institute
State air intake valve（7）The explosive gas survey meter of front end（11）, in the fire arrester one（9）With the venting of dust explosion piece（10）Between set
There is benefit cooling system（12）, in the venting of dust explosion piece（10）With the explosive gas survey meter（11）Between be equipped with bypath system（13）,
In the heat exchange type catalysis oxidation all-in-one machine（3）It is equipped with dump system（14）, the external electrical of entire exhaust treatment system
Property connection PLC control cabinet（15）.
2. a kind of catalysis burning waste gas processing system for medium and small air quantity as described in claim 1, which is characterized in that described
Bypath system（13）Including bypass line（16）Be connected to the bypass line（16）On activated carbon adsorption case（17）, described
Bypass line（16）One end and the venting of dust explosion piece（10）With the explosive gas survey meter（11）Between the admission line
（2）Connection, the other end and the outlet pipe（4）Connection, in the bypass line（16）The upper close admission line（2）'s
One end is equipped with bypath valve（18）, close to the outlet pipe（4）One end be equipped with fire arrester two（19）.
3. a kind of catalysis burning waste gas processing system for medium and small air quantity as claimed in claim 2, which is characterized in that described
Mend cooling system（12）Including mending cold dilution air（20）Be located at and the admission line（2）The cold dilution valve of the benefit of interface
（21）.
4. a kind of catalysis burning waste gas processing system for medium and small air quantity as claimed in claim 3, which is characterized in that described
Heat exchange type catalysis oxidation all-in-one machine（3）Inside it is divided into upper layer and lower layer region, is equipped with plate heat exchanger in lower region（22）, top regions
It is separated between domain and lower region with partition（23）, in the partition（23）On be provided with inlet channel（24）, top area divides again
For two regions in left and right, right area is combustion chamber（25）, left area is catalyst chamber（26）, in the left bottom of lower region
Equipped with air inlet（27）, bottom right side be equipped with gas outlet（28）, dump mouth is equipped in the right hand top of top area（29）.
5. a kind of catalysis burning waste gas processing system for medium and small air quantity as claimed in claim 4, which is characterized in that in institute
State combustion chamber（25）It is interior to be equipped with U-shaped electric heating tube（30）, the electric heating tube（30）It is made of stainless steel, resistance wire is nickel chromium triangle
Silk, passes through electric cabinet（31）It is connect with external circuitry.
6. a kind of catalysis burning waste gas processing system for medium and small air quantity as claimed in claim 5, which is characterized in that in institute
State catalyst chamber（26）It is interior to be equipped with one stage catalyzing burning bed（32）Burning bed is catalyzed with second level（33）, in the one stage catalyzing burning bed
（32）Burning bed is catalyzed with the second level（33）Between be equipped with compensation heating zone（34）, in the compensation heating zone（34）Interior be equipped with is mended
Repay heating tube（35）, the one stage catalyzing burning bed（32）Burning bed is catalyzed with the second level（33）It is made of multiple beds,
Bed use is piled up formula mode and is placed, and ceramic base and metal base monolithic honeycomb catalyst, every layer of bed are equipped in bed
Between separated with stainless steel cloth, in the one stage catalyzing burning bed（32）Burning bed is catalyzed with the second level（33）Bottom difference
Equipped with grid（36）, in the catalyst chamber（26）Left side be equipped with maintenance door（37）.
7. a kind of catalysis burning waste gas processing system for medium and small air quantity as claimed in claim 6, which is characterized in that in institute
State combustion chamber（25）Import, the catalyst chamber（26）Import, the one stage catalyzing burning bed（32）Region, the benefit
Repay heating zone（34）, the second level be catalyzed burning bed（33）Region and the heat exchange type catalysis oxidation all-in-one machine（3）'s
Inlet and outlet is respectively equipped with temperature sensor（28）, in the catalyst chamber（26）Top is equipped with pressure sensor one（39）.
8. a kind of catalysis burning waste gas processing system for medium and small air quantity as claimed in claim 7, which is characterized in that described
Dump system（14）Including with the dump mouth（29）The dump pipeline of connection（41）, the dump pipe
Road（41）The upper close dump mouth（29）One end be equipped with dump valve（40）, the other end and the bypass line
（16）Exit be connected, in the dump pipeline（41）It is equipped with pressure sensor two（42）.
9. a kind of catalysis burning waste gas processing system for medium and small air quantity as claimed in claim 8, which is characterized in that institute
State heat exchange type catalysis oxidation all-in-one machine（3）Shell（43）It is made of carbon steel sheet, liner（44）It is made of stainless steel plate, described
Shell（43）With the liner（44）Between be equipped with 150 mm silicate heat-preservation cotton layer（45）.
10. a kind of catalysis burning waste gas processing system for medium and small air quantity as claimed in claim 9, which is characterized in that
The air-introduced machine（5）Input end be equipped with manual modulation valve（46）.
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| CN110986060A (en) * | 2019-11-26 | 2020-04-10 | 北京航化节能环保技术有限公司 | Heat bypass safety discharge system of heat accumulating type thermal oxidation furnace |
| CN113048480A (en) * | 2019-12-27 | 2021-06-29 | 四川伟程环保技术开发有限公司 | Harmless treatment method for garbage in high-altitude low-oxygen area |
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| CN113048480A (en) * | 2019-12-27 | 2021-06-29 | 四川伟程环保技术开发有限公司 | Harmless treatment method for garbage in high-altitude low-oxygen area |
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