CN110732221B - Coating waste gas treatment system and treatment process - Google Patents
Coating waste gas treatment system and treatment process Download PDFInfo
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- CN110732221B CN110732221B CN201911136404.2A CN201911136404A CN110732221B CN 110732221 B CN110732221 B CN 110732221B CN 201911136404 A CN201911136404 A CN 201911136404A CN 110732221 B CN110732221 B CN 110732221B
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- 238000000034 method Methods 0.000 title claims abstract description 56
- 230000008569 process Effects 0.000 title claims abstract description 52
- 239000011248 coating agent Substances 0.000 title claims abstract description 27
- 238000000576 coating method Methods 0.000 title claims abstract description 27
- 239000002912 waste gas Substances 0.000 title claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 132
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 111
- 238000001179 sorption measurement Methods 0.000 claims abstract description 81
- 239000010815 organic waste Substances 0.000 claims abstract description 80
- 238000003795 desorption Methods 0.000 claims abstract description 65
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 claims abstract description 12
- 239000007921 spray Substances 0.000 claims abstract description 11
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 61
- 239000003595 mist Substances 0.000 claims description 49
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 46
- 239000012528 membrane Substances 0.000 claims description 43
- 229910001453 nickel ion Inorganic materials 0.000 claims description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 229910052757 nitrogen Inorganic materials 0.000 claims description 30
- 239000003973 paint Substances 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 23
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 22
- 230000003197 catalytic effect Effects 0.000 claims description 17
- 238000002360 preparation method Methods 0.000 claims description 16
- 230000009471 action Effects 0.000 claims description 15
- 238000010884 ion-beam technique Methods 0.000 claims description 13
- 239000001569 carbon dioxide Substances 0.000 claims description 11
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 11
- 239000000701 coagulant Substances 0.000 claims description 11
- 230000003647 oxidation Effects 0.000 claims description 11
- 238000007254 oxidation reaction Methods 0.000 claims description 11
- 239000010812 mixed waste Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- 230000005284 excitation Effects 0.000 claims description 7
- 229920006395 saturated elastomer Polymers 0.000 claims description 7
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 6
- 238000007084 catalytic combustion reaction Methods 0.000 claims description 6
- 239000007800 oxidant agent Substances 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 239000006247 magnetic powder Substances 0.000 claims description 4
- 230000007306 turnover Effects 0.000 claims description 4
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 3
- 238000009795 derivation Methods 0.000 claims description 3
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 3
- 239000011790 ferrous sulphate Substances 0.000 claims description 3
- 229940014144 folate Drugs 0.000 claims description 3
- OVBPIULPVIDEAO-LBPRGKRZSA-N folic acid Chemical compound C=1N=C2NC(N)=NC(=O)C2=NC=1CNC1=CC=C(C(=O)N[C@@H](CCC(O)=O)C(O)=O)C=C1 OVBPIULPVIDEAO-LBPRGKRZSA-N 0.000 claims description 3
- 235000019152 folic acid Nutrition 0.000 claims description 3
- 239000011724 folic acid Substances 0.000 claims description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 3
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 238000010422 painting Methods 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 3
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims description 3
- 229910000165 zinc phosphate Inorganic materials 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000005672 electromagnetic field Effects 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 230000010718 Oxidation Activity Effects 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000011859 microparticle Substances 0.000 description 2
- 238000001259 photo etching Methods 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
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Images
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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/06—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 by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- 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
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides a coating waste gas treatment process, which comprises the following process steps: spray introduction and filtration, organic waste gas adsorption, desorption treatment of an activated carbon adsorption device and organic waste gas treatment. Through dry-type defoaming all-in-one earlier with having sticky spraying filter clean, organic waste gas is adsorbed to the rethread active carbon adsorption device, and active carbon adsorption device still is equipped with the desorption mode in addition, and this kind of processing technology is not only efficient, and the filter effect is good, can not take place to block up and become invalid in whole process flow moreover, and is with low costs, the energy consumption is low.
Description
Technical Field
The invention relates to the technical field of paint spraying processes, in particular to a coating waste gas treatment system and a treatment process.
Background
The prior paint spraying and baking process is generally finished in a paint baking room, and a large amount of paint mist, organic volatile gas and other waste gases are generated in the paint spraying and baking process.
The common process flow is that the exhaust gas of the paint spray booth is filtered to remove particulate matters in the exhaust gas, and then the filtered gas is catalyzed and oxidized. However, the paint mist has viscosity, so that the problems of low efficiency, blockage of an initial filter opening, failure of an activated carbon adsorption function and the like can occur in the treatment process.
Disclosure of Invention
The invention aims to provide a coating waste gas treatment process to solve the problems of low efficiency, blockage of an initial filter port, failure of an activated carbon adsorption function and the like caused by paint mist.
In order to achieve the purpose, the invention provides the following technical scheme: a coating waste gas treatment process comprises the following process steps:
spray introduction and filtration: arranging a plurality of air suction pipelines at the top of the coating room, introducing mixed waste gas in the coating room into a gas collecting container through the air suction pipelines, and introducing the mixed waste gas into a dry-type defoaming all-in-one machine through a filtering pipeline to filter the spray in the mixed waste gas to obtain organic waste gas;
organic waste gas adsorption: the organic waste gas discharged by the dry-type defoaming all-in-one machine is guided into an adsorption container through an adsorption fan and is adsorbed by an active carbon adsorption device;
desorption treatment of an activated carbon adsorption device: when the activated carbon adsorption device is in a saturated state, closing the organic gas introduction channel and desorbing the activated carbon adsorption device;
and (3) organic waste gas treatment: the organic waste gas desorbed from the activated carbon adsorption device is compressed and then introduced into the catalytic combustion device, is converted into water and carbon dioxide under the action of the catalyst, and is discharged into the atmosphere.
As an improvement of the invention, a paint mist leveling treatment process is also arranged between the spray introduction filtering process and the organic waste gas adsorption, and the paint mist leveling treatment process comprises the following steps: organic waste gas filtered by the dry-type defoaming all-in-one machine is guided into the spiral fan duct to form spiral airflow and then is guided into the electromagnetic demisting container to be demisted thoroughly, a granular coagulant feeding device and a water mist spraying device are arranged at the bottom of the electromagnetic demisting container, the granular coagulant at the bottom carries water mist to move towards the top of the electromagnetic demisting container under the electromagnetic action to form a mist water curtain, and the organic waste gas passes through the mist water curtain in the form of spiral airflow.
As an improvement of the invention, the granular flocculant comprises the following components in percentage by weight: 12 to 18 percent of aluminum chloride, 5 to 11 percent of polyacrylamide, 16 to 25 percent of ferrous sulfate, 13 to 22 percent of sodium silicate and 30 to 40 percent of magnetic powder.
As an improvement of the invention, the process flow of the desorption treatment of the activated carbon adsorption device comprises the following steps:
(1) a desorption nitrogen preparation stage: leading out nitrogen for desorption from a nitrogen source, preheating, and keeping the temperature of the nitrogen at 90-250 ℃ all the time;
(2) and (3) a desorption environment air pressure control stage: adjusting the air pressure in the desorption container by controlling the introduction and the derivation of nitrogen, increasing the air pressure in the desorption container to 200kPa-350kPa and keeping the desorption container in a standing state for 5-10 minutes, reducing the air pressure in the desorption container to 50kPa-90kPa, and desorbing the organic waste gas in the activated carbon adsorption container in the air pressure environment of 50kPa-90 kPa;
(3) and (3) mixed gas separation stage: and (3) carrying out gas separation treatment on the desorbed mixed gas containing the organic waste gas and the nitrogen to separate the organic waste gas from the nitrogen.
As a refinement of the invention, a condenser is used to separate the organic waste gas from the nitrogen in the mixed gas separation stage.
As an improvement of the invention, the treatment process flow of the organic waste gas comprises the following steps:
(1) a high-temperature pretreatment stage: the organic waste gas is desorbed from the activated carbon adsorption device and then is led into a heating device for heating pretreatment, the heating mode is sectional gradient heating, the heating temperature of the first gradient is 40-70 ℃, the heating temperature of the second gradient is 90-110 ℃, and the heating temperature of the third gradient is 150-180 ℃;
(2) and (3) organic waste gas activity improving stage: introducing the organic waste gas after high-temperature pretreatment into an active excitation container, wherein an ultraviolet irradiation device and a nickel ion membrane are arranged in the active excitation container, and the organic waste gas passes through the nickel ion membrane in ultraviolet irradiation to enter the next treatment stage;
(3) a catalytic oxidation stage: the organic waste gas passes through the nickel ion membrane and is guided into the catalytic oxidizer to be decomposed into carbon dioxide and water under the action of the catalyst, and the carbon dioxide and the water are discharged into the atmosphere.
As an improvement of the invention, the photoetching formation process of the nickel ion film comprises the following steps:
(1) a film frame manufacturing stage: plant fiber filaments are adopted to construct a screen-shaped membrane frame, and the screen holes of the membrane frame are circular or rhombic;
(2) an environment preparation stage: placing the membrane in a preparation chamber, wherein a nickel ion beam and NO are respectively introduced into the preparation chamber2In NO2Depositing a nickel ion beam on the mesh to form a membrane structure, wherein the size of the nickel ion beam is less than 30 nm;
(3) and (3) flattening the nickel film: after nickel ion beams are deposited on the sieve pores, nitrogen flowing at a constant speed is introduced to two sides of the formed membrane structure, the nickel ion membrane is gradually flattened under the blowing of the nitrogen at the two sides, and the thicknesses of the nickel ion membrane tend to be the same;
(4) taking out the nickel ion membrane: and taking the nickel ion membrane out of the preparation chamber by using a carbon clamp for standby.
As an improvement of the invention, in the catalytic oxidation stage, the adopted catalytic oxidant comprises 35-43% of titanium oxide, 10-25% of silicon oxide, 3-5% of zinc folate, 2-8% of zinc phosphate and 35-50% of sodium peroxide by weight percent.
As an improvement of the present invention, in the desorption treatment process of the activated carbon adsorption device, a desorption container is used for desorption, and the desorption container comprises:
a frame;
the adsorption bottom tank is fixedly arranged at the bottom of the rack, the adsorption bottom tank is of a hemispherical structure with an opening at the upper end, the upper end face of the adsorption bottom tank penetrates through and extends to the upper part of the rack, and the lower end face of the adsorption bottom tank is provided with a first mounting plane for arranging a pipe orifice;
the desorption bottom tank is fixedly arranged at the bottom of the rack, the desorption bottom tank is of a hemispherical structure with an opening at the upper end, the upper end face of the desorption bottom tank penetrates through and extends to the upper part of the rack, and the lower end face of the desorption bottom tank is provided with a second mounting plane for mounting a pipe orifice;
the tank cover is of a hemispherical structure with an opening at the lower end, a third mounting plane for mounting a pipe orifice is arranged on the upper end face of the tank cover, the diameters of the spheres of the adsorption bottom tank, the desorption bottom tank and the tank cover are the same, a fixing frame is further arranged inside the tank cover and used for fixing an activated carbon device, and the tank cover is rotatably arranged on the upper surface of the rack through a rotating assembly;
the rotating assembly comprises a rotating platform, a first connecting arm and a second connecting arm, wherein the rotating platform is movably arranged in a circular groove formed in the upper end face of the rack through a ball, the lower surface of the rotating platform is provided with a rotating shaft fixed by a bearing, the rotating shaft is connected with a first motor arranged on the lower surface of the rack in a transmission manner, one end of the first connecting arm is hinged to a low-position connecting seat, the low-position connecting seat is fixed on the upper surface of the rotating platform, the other end of the first connecting arm is hinged to the near end of a turnover plate, the turnover plate is rotatably arranged on the side wall of the tank cover, one end of the second connecting arm is hinged to a high-position connecting seat, the high-position connecting seat is fixed on the upper surface of the rotating platform, the other end of the second connecting arm is hinged to the far end of the turnover plate, and the first connecting arm rotates around the axis of the, the second connecting arm is in transmission connection with the first connecting arm through a gear;
the distance between the adsorption bottom tank and the desorption bottom tank and the distance between the rotary table central shafts are equal.
A coating waste gas treatment system sequentially comprises the following components according to a treatment process:
the air suction device is used for sucking and collecting the waste gas of the painting workshop;
the dry-type defoaming all-in-one machine is used for guiding the collected waste gas into the dry-type defoaming all-in-one machine for primary filtration and filtering paint mist in the waste gas;
the activated carbon adsorption device is used for adsorbing and filtering the preliminarily filtered waste gas on the organic waste gas by adopting the activated carbon device;
the activated carbon desorption device is used for desorbing the activated carbon device with saturated adsorption;
and the catalytic combustion device is used for carrying out catalytic oxidation treatment on the desorbed organic waste gas.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof.
The technical solution of the present invention is further described in detail by the following examples.
Drawings
Fig. 1 is a schematic structural view of a desorption container;
fig. 2 is a top view of the desorption vessel;
fig. 3 is a cross-sectional view of the desorption vessel.
The components in the figure are:
10-frame, 11-circular groove;
20-an adsorption bottom tank, 21-a first mounting plane;
30-desorption bottom tank, 31-second installation plane;
40-a tank cover, 41-a third mounting plane, 42-a fixing frame and 43-an active carbon device;
50-rotating component, 51-rotating platform, 52-rotating shaft, 53-first motor, 54-first connecting arm, 55-turnover plate, 56-second connecting arm, 57-high connecting seat, 58-second motor and 59-low connecting seat.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
A coating waste gas treatment process comprises the following process steps:
spray introduction and filtration: arranging a plurality of air suction pipelines at the top of the coating room, introducing mixed waste gas in the coating room into a gas collecting container through the air suction pipelines, and introducing the mixed waste gas into a dry-type defoaming all-in-one machine through a filtering pipeline to filter the spray in the mixed waste gas to obtain organic waste gas;
organic waste gas adsorption: the organic waste gas discharged by the dry-type defoaming all-in-one machine is guided into an adsorption container through an adsorption fan and is adsorbed by an active carbon adsorption device;
desorption treatment of an activated carbon adsorption device: when the activated carbon adsorption device is in a saturated state, closing the organic gas introduction channel and desorbing the activated carbon adsorption device;
and (3) organic waste gas treatment: the organic waste gas desorbed from the activated carbon adsorption device is compressed and then introduced into the catalytic combustion device, is converted into water and carbon dioxide under the action of the catalyst, and is discharged into the atmosphere.
The working principle of the technical scheme is as follows: the mist of the big concentration of can gathering when continuously carrying out the spraying to the work piece in the coating room and the mist of organic waste gas, if the processing can cause the incident untimely, consequently set up a plurality of pipelines at the coating room top and concentrate the gas collection container in unified the processing with mist, the fan filters the graininess mist among the mist with mist in the dry-type defoaming all-in-one with these mist earlier letting in, and adsorb organic waste gas discharge by active carbon adsorption device, active carbon adsorption device can discharge the atmosphere with organic waste gas adsorption exhaust clean gas after finishing. The adsorption function of the activated carbon adsorption device is obviously and greatly reduced after the activated carbon adsorption device is saturated, so that the activated carbon adsorption device needs to be subjected to a desorption process, and organic waste gas obtained after desorption is further compressed and then oxidized in a catalytic device, converted into water and carbon dioxide and discharged into the atmosphere.
The beneficial effects of the above technical scheme are that: through dry-type defoaming all-in-one earlier with having sticky spraying filter clean, organic waste gas is adsorbed to the rethread active carbon adsorption device, and active carbon adsorption device still is equipped with the desorption mode in addition, and this kind of processing technology is not only efficient, and the filter effect is good, can not take place to block up and become invalid in whole process flow moreover, and is with low costs, the energy consumption is low.
In one embodiment of the invention, a paint mist leveling treatment process is further arranged between the spray introduction filtering process and the organic waste gas adsorption, and the paint mist leveling treatment process comprises the following steps: organic waste gas filtered by the dry-type defoaming all-in-one machine is guided into the spiral fan duct to form spiral airflow and then is guided into the electromagnetic demisting container to be demisted thoroughly, a granular coagulant feeding device and a water mist spraying device are arranged at the bottom of the electromagnetic demisting container, the granular coagulant at the bottom carries water mist to move towards the top of the electromagnetic demisting container under the electromagnetic action to form a mist water curtain, and the organic waste gas passes through the mist water curtain in the form of spiral airflow.
Wherein the granular coagulant comprises the following components in percentage by weight: 12 to 18 percent of aluminum chloride, 5 to 11 percent of polyacrylamide, 16 to 25 percent of ferrous sulfate, 13 to 22 percent of sodium silicate and 30 to 40 percent of magnetic powder.
The working principle of the technical scheme is as follows: the paint mist can not be completely removed after being filtered by the dry-type defoaming all-in-one machine, the air led into the active carbon adsorption device is mixed with a little paint mist, the paint mist is difficult to desorb after being adsorbed in the active carbon adsorption device, the capacity of the active carbon adsorption device for adsorbing organic waste gas is influenced, the service life of the active carbon adsorption device is also shortened, and the maintenance cost is increased. Therefore, the paint mist in the gas entering the activated carbon adsorption device needs to be thoroughly removed, and the paint mist in the waste gas is collected in a centralized manner by the directional effect of the magnetic material through the electromagnetic field by adopting the electromagnetic adsorption principle. The specific process is that the organic waste gas filtered by the dry-type defoaming all-in-one machine is firstly led into a duct of a spiral fan to form spiral airflow, and the spiral airflow mixed with paint mist is led into an electromagnetic defogging container under the action of the fan. The electromagnetic field formed by the electromagnetic device exists in the electromagnetic demisting container, the coagulant at the bottom carries the water mist to move towards the top of the electromagnetic demisting container under the action of the electromagnetic field, so that a mist water curtain moving from bottom to top is formed in the electromagnetic demisting container, and the spiral air flow mixed with a small amount of paint mist can gather on the surface of the coagulant to move along with the mist water curtain when passing through the mist water curtain and is gathered by a collecting container arranged at the top of the electromagnetic demisting container. Because the gas with a small amount of paint mist contacts the mist water curtain in a rotational flow mode, and the rotation direction of the rotational flow gas is opposite to the movement direction of the mist water curtain, the contact area between the rotational flow gas and the mist water curtain can be improved to the maximum extent in the contact process, and the paint mist removing effect is greatly improved. The magnetic powder in the coagulant is used for obtaining upward movement power in an electromagnetic field, and other substances are used for coagulating paint mist and water mist.
The beneficial effects of the above technical scheme are that: adopt this structure to carry out further coating cloud to waste gas and clear away technology, can not only effectively clear away the coating cloud and avoid its polluted atmosphere environment, but also can avoid active carbon adsorption device to adsorb the coating cloud and lead to becoming invalid, can effectively improve the treatment effect of whole technology, also can reduce the cost of whole process flow.
In one embodiment of the present invention, the process flow of the desorption treatment of the activated carbon adsorption device comprises:
(1) a desorption nitrogen preparation stage: leading out nitrogen for desorption from a nitrogen source, preheating, and keeping the temperature of the nitrogen at 90-250 ℃ all the time;
(2) and (3) a desorption environment air pressure control stage: adjusting the air pressure in the desorption container by controlling the introduction and the derivation of nitrogen, increasing the air pressure in the desorption container to 200kPa-350kPa and keeping the desorption container in a standing state for 5-10 minutes, reducing the air pressure in the desorption container to 50kPa-90kPa, and desorbing the organic waste gas in the activated carbon adsorption container in the air pressure environment of 50kPa-90 kPa;
(3) and (3) mixed gas separation stage: and (3) carrying out gas separation treatment on the desorbed mixed gas containing the organic waste gas and the nitrogen to separate the organic waste gas from the nitrogen.
A condenser is used to separate the organic off-gas from the nitrogen in the mixed gas separation stage.
The working principle and the beneficial effects of the technical scheme are as follows: the desorption principle that this embodiment provided is that the organic gas such as benzene, toluene, xylene in utilizing hot medium gas to replace the active carbon device under specific condition environment to in leading into the condenser recovery and recycle, monitor and adjust the desorption environment by the line monitoring control system in desorption process. The specific condition environment refers to that high air pressure is generated in the desorption container, pressure is quickly lost and low air pressure is kept after the desorption container is stabilized for a period of time, and desorption treatment is carried out on the activated carbon device in the low air pressure environment. The high-pressure environment is instantaneously changed under the state that the high pressure tends to be stable based on the mutual attraction among the microparticles, so that the attraction among the microparticles is unstable, the adsorption force between the active carbon device and the organic waste gas is reduced, and the adsorption connection relationship between the organic waste gas and the active carbon device can be more damaged. Under the condition of firstly high pressure and then quickly low pressure, the effect of replacing the organic waste gas by the hot medium gas can be obviously improved.
In one embodiment of the present invention, the organic waste gas treatment process comprises:
(1) a high-temperature pretreatment stage: the organic waste gas is desorbed from the activated carbon adsorption device and then is led into a heating device for heating pretreatment, the heating mode is sectional gradient heating, the heating temperature of the first gradient is 40-70 ℃, the heating temperature of the second gradient is 90-110 ℃, and the heating temperature of the third gradient is 150-180 ℃;
(2) and (3) organic waste gas activity improving stage: introducing the organic waste gas after high-temperature pretreatment into an active excitation container, wherein an ultraviolet irradiation device and a nickel ion membrane are arranged in the active excitation container, and the organic waste gas passes through the nickel ion membrane in ultraviolet irradiation to enter the next treatment stage;
(3) a catalytic oxidation stage: the organic waste gas passes through the nickel ion membrane and is guided into the catalytic oxidizer to be decomposed into carbon dioxide and water under the action of the catalyst, and the carbon dioxide and the water are discharged into the atmosphere.
In the catalytic oxidation stage, the adopted catalytic oxidant comprises 35-43% of titanium oxide, 10-25% of silicon oxide, 3-5% of zinc folate, 2-8% of zinc phosphate and 35-50% of sodium peroxide by weight percent.
The working principle and the beneficial effects of the technical scheme are as follows: when the organic waste gas is catalytically oxidized, the organic waste gas is difficult to be completely catalytically oxidized, and the oxidation activity of the organic waste gas needs to be excited in order to possibly improve the catalytic oxidation ratio, so the organic gas is heated by adopting a gradient high-temperature heating mode, the oxidation rate of the hot organic waste gas is higher than that of the hot organic waste gas at low temperature, and the particle activity of the organic waste gas can be obviously improved by adopting the gradient heating mode. The organic gas heated at high temperature passes through the nickel ion membrane in the activity excitation container under the action of ultraviolet irradiation, the oxidation activity of the organic gas can be further improved under the action of the nickel ion membrane, and the organic waste gas can be catalyzed and oxidized to the maximum extent under the action of the process flow, so that the pollution to the atmosphere is reduced.
In one embodiment of the present invention, the process for forming the nickel ion film includes:
(1) a film frame manufacturing stage: plant fiber filaments are adopted to construct a screen-shaped membrane frame, and the screen holes of the membrane frame are circular or rhombic;
(2) an environment preparation stage: placing the membrane in a preparation chamber, wherein a nickel ion beam and NO are respectively introduced into the preparation chamber2In NO2Depositing a nickel ion beam on the mesh to form a membrane structure, wherein the size of the nickel ion beam is less than 30 nm;
(3) and (3) flattening the nickel film: after nickel ion beams are deposited on the sieve pores, nitrogen flowing at a constant speed is introduced to two sides of the formed membrane structure, the nickel ion membrane is gradually flattened under the blowing of the nitrogen at the two sides, and the thicknesses of the nickel ion membrane tend to be the same;
(4) taking out the nickel ion membrane: and taking the nickel ion membrane out of the preparation chamber by using a carbon clamp for standby.
The working principle and the beneficial effects of the technical scheme are as follows: the preparation process of the nickel ion membrane is carried out by referring to the process of photoetching membrane supplement. The specific technological process includes making netted film frame with plant fiber, forming several fine sieve pores on the film frame, and passing through NO2The nickel ion beams are deposited on the sieve pores to form a membrane structure, and the membrane structure is flattened to form a uniform membrane structure under the action of nitrogen on two sides, so that the oxidation activity of the organic waste gas is effectively excited.
A coating waste gas treatment system sequentially comprises the following components according to a treatment process:
the air suction device is used for sucking and collecting the waste gas of the painting workshop;
the dry-type defoaming all-in-one machine is used for guiding the collected waste gas into the dry-type defoaming all-in-one machine for primary filtration and filtering paint mist in the waste gas;
the activated carbon adsorption device is used for adsorbing and filtering the preliminarily filtered waste gas on the organic waste gas by adopting the activated carbon device;
the activated carbon desorption device is used for desorbing the activated carbon device with saturated adsorption;
and the catalytic combustion device is used for carrying out catalytic oxidation treatment on the desorbed organic waste gas.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. The coating waste gas treatment process is characterized by comprising the following process steps:
spray introduction and filtration: arranging a plurality of air suction pipelines at the top of the coating room, introducing mixed waste gas in the coating room into a gas collecting container through the air suction pipelines, and introducing the mixed waste gas into a dry-type defoaming all-in-one machine through a filtering pipeline to filter the spray in the mixed waste gas to obtain organic waste gas;
organic waste gas adsorption: the organic waste gas discharged by the dry-type defoaming all-in-one machine is guided into an adsorption container through an adsorption fan and is adsorbed by an active carbon adsorption device;
desorption treatment of an activated carbon adsorption device: when the activated carbon adsorption device is in a saturated state, closing the organic gas introduction channel and desorbing the activated carbon adsorption device;
and (3) organic waste gas treatment: compressing the organic waste gas desorbed from the activated carbon adsorption device, introducing the compressed organic waste gas into a catalytic combustion device, converting the organic waste gas into water and carbon dioxide under the action of a catalyst, and discharging the water and the carbon dioxide into the atmosphere;
a paint mist leveling treatment process is also arranged between the spray introduction filtering process and the organic waste gas adsorption, and the paint mist leveling treatment process comprises the following steps: the organic waste gas filtered by the dry-type defoaming all-in-one machine is guided into a spiral fan duct to form spiral airflow and then is guided into an electromagnetic demisting container for thorough demisting, a granular coagulant feeding device and a water mist spraying device are arranged at the bottom of the electromagnetic demisting container, the granular coagulant at the bottom carries water mist to move towards the top of the electromagnetic demisting container under the electromagnetic action to form a mist water curtain, and the organic waste gas passes through the mist water curtain in the form of spiral airflow;
the granular coagulant comprises the following components in percentage by weight: 12 to 18 percent of aluminum chloride, 5 to 11 percent of polyacrylamide, 16 to 25 percent of ferrous sulfate, 13 to 22 percent of sodium silicate and 30 to 40 percent of magnetic powder,
in the desorption treatment process of the activated carbon adsorption device, a desorption container is adopted for desorption, and the desorption container comprises:
a frame (10);
the adsorption bottom tank (20) is fixedly arranged at the bottom of the rack (10), the adsorption bottom tank (20) is of a hemispherical structure with an opening at the upper end, the upper end face of the adsorption bottom tank (20) penetrates through and extends to the upper part of the rack (10), and the lower end face of the adsorption bottom tank (20) is provided with a first mounting plane (21) for arranging a pipe orifice;
the desorption bottom tank (30) is fixedly arranged at the bottom of the rack (10), the desorption bottom tank (30) is of a hemispherical structure with an opening at the upper end, the upper end face of the desorption bottom tank (30) penetrates through and extends to the upper part of the rack (10), and the lower end face of the desorption bottom tank (30) is provided with a second mounting plane (31) for mounting a pipe orifice;
the tank cover (40) is of a hemispherical structure with an opening at the lower end, a third mounting plane (41) for mounting a pipe orifice is arranged on the upper end face of the tank cover (40), the diameters of spheres of the adsorption bottom tank (20), the desorption bottom tank (30) and the tank cover (40) are the same, a fixing frame (42) is further arranged inside the tank cover (40), the fixing frame (42) is used for fixing an activated carbon device (43), and the tank cover (40) is rotatably arranged on the upper surface of the rack (10) through a rotating assembly (50);
rotating assembly (50), including revolving stage (51), first connecting arm (54), second connecting arm (56), arranging in of revolving stage (51) through the ball activity in circular slot (11) that the up end of frame (10) was seted up, the lower surface of revolving stage (51) is equipped with pivot (52) fixed by the bearing, pivot (52) with arrange in first motor (53) transmission of frame (10) lower surface is connected, the one end of first connecting arm (54) is articulated with low level connecting seat (59), low level connecting seat (59) are fixed the upper surface of revolving stage (51), the other end of first connecting arm (54) is articulated with the near-end of returning face plate (55), returning face plate (55) rotate the setting on the lateral wall of cover (40), the one end of second connecting arm (56) is articulated with high level connecting seat (57), the high-position connecting seat (57) is fixed on the upper surface of the rotating table (51), the other end of the second connecting arm (56) is hinged with the far end of the turnover plate (55), the first connecting arm (54) rotates around the axis of the first connecting arm under the driving of a second motor (58), and the second connecting arm (56) is in transmission connection with the first connecting arm (54) through a gear;
the distance between the adsorption bottom tank (20) and the desorption bottom tank (30) and the central shaft of the rotating platform (51) is equal.
2. The coating exhaust gas treatment process according to claim 1, characterized in that: the process flow of the desorption treatment of the activated carbon adsorption device comprises the following steps:
(1) a desorption nitrogen preparation stage: leading out nitrogen for desorption from a nitrogen source, preheating, and keeping the temperature of the nitrogen at 90-250 ℃ all the time;
(2) and (3) a desorption environment air pressure control stage: adjusting the air pressure in the desorption container by controlling the introduction and the derivation of nitrogen, increasing the air pressure in the desorption container to 200kPa-350kPa and keeping the desorption container in a standing state for 5-10 minutes, reducing the air pressure in the desorption container to 50kPa-90kPa, and desorbing the organic waste gas in the activated carbon adsorption container in the air pressure environment of 50kPa-90 kPa;
(3) and (3) mixed gas separation stage: and (3) carrying out gas separation treatment on the desorbed mixed gas containing the organic waste gas and the nitrogen to separate the organic waste gas from the nitrogen.
3. The coating exhaust gas treatment process according to claim 2, wherein a condenser is used to separate organic exhaust gas from nitrogen gas in the mixed gas separation stage.
4. The coating exhaust gas treatment process according to claim 1, wherein the treatment process flow of the organic exhaust gas comprises:
(1) a high-temperature pretreatment stage: the organic waste gas is desorbed from the activated carbon adsorption device and then is led into a heating device for heating pretreatment, the heating mode is sectional gradient heating, the heating temperature of the first gradient is 40-70 ℃, the heating temperature of the second gradient is 90-110 ℃, and the heating temperature of the third gradient is 150-180 ℃;
(2) and (3) organic waste gas activity improving stage: introducing the organic waste gas after high-temperature pretreatment into an active excitation container, wherein an ultraviolet irradiation device and a nickel ion membrane are arranged in the active excitation container, and the organic waste gas passes through the nickel ion membrane in ultraviolet irradiation to enter the next treatment stage;
(3) a catalytic oxidation stage: the organic waste gas passes through the nickel ion membrane and is guided into the catalytic oxidizer to be decomposed into carbon dioxide and water under the action of the catalyst, and the carbon dioxide and the water are discharged into the atmosphere.
5. The coating exhaust gas treatment process according to claim 4, wherein the nickel ion film forming process comprises:
(1) a film frame manufacturing stage: plant fiber filaments are adopted to construct a screen-shaped membrane frame, and the screen holes of the membrane frame are circular or rhombic;
(2) an environment preparation stage: placing the membrane in a preparation chamber, wherein a nickel ion beam and NO are respectively introduced into the preparation chamber2In NO2Depositing a nickel ion beam on the mesh to form a membrane structure, wherein the size of the nickel ion beam is less than 30 nm;
(3) and (3) flattening the nickel film: after nickel ion beams are deposited on the sieve pores, nitrogen flowing at a constant speed is introduced to two sides of the formed membrane structure, the nickel ion membrane is gradually flattened under the blowing of the nitrogen at the two sides, and the thicknesses of the nickel ion membrane tend to be the same;
(4) taking out the nickel ion membrane: and taking the nickel ion membrane out of the preparation chamber by using a carbon clamp for standby.
6. The coating exhaust gas treatment process according to claim 4, characterized in that: in the catalytic oxidation stage, the adopted catalytic oxidant comprises 35-43% of titanium oxide, 10-25% of silicon oxide, 3-5% of zinc folate, 2-8% of zinc phosphate and 35-50% of sodium peroxide by weight percent.
7. A coating exhaust gas treatment system applied to the treatment process according to claim 1, which comprises the following steps in sequence according to the treatment process:
the air suction device is used for sucking and collecting the waste gas of the painting workshop;
the dry-type defoaming all-in-one machine is used for guiding the collected waste gas into the dry-type defoaming all-in-one machine for primary filtration and filtering paint mist in the waste gas;
the activated carbon adsorption device is used for adsorbing and filtering the preliminarily filtered waste gas on the organic waste gas by adopting the activated carbon device;
the activated carbon desorption device is used for desorbing the activated carbon device with saturated adsorption;
and the catalytic combustion device is used for carrying out catalytic oxidation treatment on the desorbed organic waste gas.
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| CN208799935U (en) * | 2018-07-19 | 2019-04-30 | 浙江赛鹭鑫仪器有限公司 | A kind of moveable VOC governing system |
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| CN104128059A (en) * | 2014-07-29 | 2014-11-05 | 罗建民 | Impinging stream gas purification system |
| CN106178824A (en) * | 2016-08-29 | 2016-12-07 | 无锡华烨除锈涂装设备有限公司 | VOCs treatment technique |
| CN206617949U (en) * | 2017-02-20 | 2017-11-07 | 常州创美环境科技有限公司 | Lacquer spraying waste gas charcoal absorption desorption catalyzing burner |
| CN208799935U (en) * | 2018-07-19 | 2019-04-30 | 浙江赛鹭鑫仪器有限公司 | A kind of moveable VOC governing system |
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Address after: 224007 room 602-2, building 4, No. 5, South hope Avenue, Yancheng Economic and Technological Development Zone, Jiangsu Province Patentee after: Jiangsu yingkai coating equipment Co.,Ltd. Address before: 224000 room 602-2, building 4, No. 5, South hope Avenue, Yancheng Economic and Technological Development Zone, Jiangsu Province Patentee before: Yancheng yingkai coating equipment Co.,Ltd. |