CN110732221A - coating waste gas treatment system and treatment process - Google Patents
coating waste gas treatment system and treatment process Download PDFInfo
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- CN110732221A CN110732221A CN201911136404.2A CN201911136404A CN110732221A CN 110732221 A CN110732221 A CN 110732221A CN 201911136404 A CN201911136404 A CN 201911136404A CN 110732221 A CN110732221 A CN 110732221A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—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
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
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- 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
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Abstract
The invention provides coating waste gas treatment processes, which comprise the following process steps of spray introduction filtration, organic waste gas adsorption, desorption treatment of an active carbon adsorption device and treatment of organic waste gas, wherein sticky spray is firstly filtered through a dry-type defoaming machine, then the active carbon adsorption device adsorbs the organic waste gas, and the active carbon adsorption device is also provided with a desorption mode.
Description
Technical Field
The invention relates to the technical field of paint spraying processes, in particular to a coating waste gas treatment system and treatment process.
Background
The existing paint spraying and baking process is finished in a paint baking room as in the furniture, aviation, automobile, ship, container, hardware and electrical appliances, and the like, 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 coating waste gas treatment processes 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 that the coating waste gas treatment process comprises the following process steps:
spraying and introducing and filtering, namely arranging a plurality of air suction pipelines at the top of the coating room, introducing the 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 machine through a filtering pipeline to spray and filter the mixed waste gas to obtain organic waste gas;
organic waste gas adsorption, namely leading the organic waste gas discharged by a dry type defoaming machine into an adsorption container through an adsorption fan, and adsorbing the organic waste gas by an activated 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 improvements, a paint mist leveling treatment process is arranged between a spray introduction filtering process and organic waste gas adsorption, and comprises the steps of introducing the organic waste gas filtered by a dry type defoaming machine into a duct of a spiral fan to form spiral airflow, then introducing the spiral airflow into an electromagnetic demisting container for thorough demisting, arranging a granular coagulant feeding device and a water mist spraying device at the middle bottom of the electromagnetic demisting container, carrying water mist to move towards the top of the electromagnetic demisting container under the electromagnetic action of the granular coagulant at the bottom to form a mist water curtain, and allowing the organic waste gas to pass through the mist water curtain in the form of spiral airflow.
As an improvement of of the invention, the granular coagulant comprises the following components, by weight, 12% -18% of aluminum chloride, 5% -11% of polyacrylamide, 16% -25% of ferrous sulfate, 13% -22% of sodium silicate and 30% -40% of magnetic powder.
As improvements of the invention, the technological process of 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 modification of of the present invention, a condenser is used to separate the organic waste gas from the nitrogen gas in the mixed gas separation stage.
As an improvement of of the invention, the treatment process flow of the organic waste gas comprises the following steps:
(1) in the high-temperature pretreatment stage, 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 segmented gradient heating, the th gradient heating temperature is 40-70 ℃, the second gradient heating temperature is 90-110 ℃, and the third gradient heating temperature is 150-180 ℃;
(2) the organic waste gas activity improving stage is that the organic waste gas after high temperature pretreatment is led into an activity excitation container, an ultraviolet irradiation device and a nickel ion membrane are arranged in the activity excitation container, and the organic waste gas passes through the nickel ion membrane in the ultraviolet irradiation and enters into next treatment stages;
(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 improvements 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 improvements, in the catalytic oxidation stage, the adopted catalytic oxidation agent 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.
In modifications of the present invention, 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;
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 an th 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 table, a th connecting arm and a second connecting arm, wherein the rotating table is movably arranged in a circular groove formed in the upper end face of the rack through a ball, a rotating shaft fixed by a bearing is arranged on the lower surface of the rotating table, the rotating shaft is in transmission connection with a th motor arranged on the lower surface of the rack, the end of the th connecting arm is hinged with a low-position connecting seat, the low-position connecting seat is fixed on the upper surface of the rotating table, the other end of the th connecting arm is hinged with the near end of a turnover plate, the turnover plate is rotatably arranged on the side wall of the tank cover, the end of the second connecting arm is hinged with a high-position connecting seat, the high-position connecting seat is fixed on the upper surface of the rotating table, the other end of the second connecting arm is hinged with the far end of the turnover plate, the th connecting arm rotates around the axis of the second connecting arm under the driving of a second motor;
the distance between the adsorption bottom tank and the desorption bottom tank and the distance between the rotary table central shafts are equal.
coating waste gas treatment system, which comprises the following steps according to the treatment process:
the air suction device is used for concentrating the exhaust air suction of the painting workshop to ;
a dry defoaming body machine, wherein waste gas collected from is guided into a dry defoaming body machine for preliminary filtration, and paint mist in the waste gas is filtered;
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 step by 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-adsorption bottom tank, 21- th installation 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- th motor, 54- th 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.
coating waste gas treatment process, comprising the following process steps:
spraying and introducing and filtering, namely arranging a plurality of air suction pipelines at the top of the coating room, introducing the 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 machine through a filtering pipeline to spray and filter the mixed waste gas to obtain organic waste gas;
organic waste gas adsorption, namely leading the organic waste gas discharged by a dry type defoaming machine into an adsorption container through an adsorption fan, and adsorbing the organic waste gas by an activated 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 that mixed gas of paint mist and organic waste gas with large concentration can be collected when workpieces are continuously sprayed in a coating room, safety accidents can be caused if the mixed gas is not treated in time, therefore, a plurality of pipelines are arranged at the top of the coating room to collect the mixed gas into a gas collecting container for treatment , a fan firstly introduces the mixed gas into a dry type defoaming machine to filter granular paint mist in the mixed gas, the organic waste gas is discharged and adsorbed by an active carbon adsorption device, the active carbon adsorption device can discharge clean gas discharged after the organic waste gas is completely adsorbed into the atmosphere, the adsorption function of the active carbon adsorption device is obviously reduced after the active carbon adsorption device is saturated, a desorption process needs to be carried out on the active carbon adsorption device, and the organic waste gas obtained after desorption is subjected to steps of compression and then is oxidized in a catalytic device, converted into water and carbon dioxide and discharged into the atmosphere.
The technical scheme has the beneficial effects that sticky spray is filtered completely through the dry type defoaming machine, organic waste gas is adsorbed through the active carbon adsorption device, and the active carbon adsorption device is also provided with a desorption mode.
In embodiments of the present invention, a paint mist leveling treatment process is further provided between the spray introduction filtering process and the organic waste gas adsorption, wherein the paint mist leveling treatment process comprises the steps of introducing the organic waste gas filtered by the dry type defoaming machine into a duct of a spiral fan to form a spiral air flow, then introducing the spiral air flow into an electromagnetic demisting container for thorough demisting, wherein a granular coagulant adding device and a water mist spraying device are arranged at the bottom of the electromagnetic demisting container, the granular coagulant at the bottom moves to the top of the electromagnetic demisting container to form a mist water curtain under the electromagnetic action, and the organic waste gas passes through the mist water curtain in the form of spiral air flow.
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 that the paint mist cannot be completely removed after being filtered by the dry type foam removing body machine, a little paint mist is mixed in the gas introduced into the active carbon adsorption device, 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 shortened, and the maintenance cost is increased.
The technical scheme has the beneficial effects that the paint mist removing process for steps of carrying out on the waste gas by adopting the structure can effectively remove the paint mist to avoid polluting the atmospheric environment, can also avoid the failure caused by the paint mist adsorbed by the activated carbon adsorption device, can effectively improve the treatment effect of the whole process, and can also reduce the cost of the whole process flow.
In examples 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 that the desorption principle provided by the embodiment is that hot medium gas is used for replacing organic gas such as benzene, toluene, xylene and the like in the activated carbon device under a specific condition environment, the organic gas is introduced into the condenser for recycling, and a line monitoring control system is used for monitoring and adjusting the desorption environment in the desorption process, wherein the specific condition environment refers to that high air pressure is firstly generated in the desorption container, the pressure is quickly lost and kept at low air pressure after periods of stability, and the activated carbon device is subjected to desorption treatment in the low air pressure environment.
In embodiments of the present invention, the organic waste gas treatment process flow comprises:
(1) in the high-temperature pretreatment stage, 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 segmented gradient heating, the th gradient heating temperature is 40-70 ℃, the second gradient heating temperature is 90-110 ℃, and the third gradient heating temperature is 150-180 ℃;
(2) the organic waste gas activity improving stage is that the organic waste gas after high temperature pretreatment is led into an activity excitation container, an ultraviolet irradiation device and a nickel ion membrane are arranged in the activity excitation container, and the organic waste gas passes through the nickel ion membrane in the ultraviolet irradiation and enters into next treatment stages;
(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 technical scheme has the advantages that when the organic waste gas is subjected to catalytic oxidation, the organic waste gas is difficult to be completely subjected to catalytic oxidation, and the oxidation activity of the organic waste gas needs to be excited in order to possibly improve the catalytic oxidation ratio, so that 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, the particle activity of the organic waste gas can be obviously improved by adopting the gradient heating mode, the organic gas after being 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 by under the action of the nickel ion membrane, and under the action of the process flow, the organic waste gas can be subjected to catalytic oxidation to the greatest extent, so that the pollution to the atmosphere is reduced.
In embodiments of the present invention, the process for forming the nickel-ion film 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.
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 beam is deposited on the sieve mesh to form a membrane structure, and the nitrogen gas acts on the two sidesThe lower layer is flattened to form a uniform film-shaped structure so as to effectively stimulate the oxidation activity of the organic waste gas.
coating waste gas treatment system, which comprises the following steps according to the treatment process:
the air suction device is used for concentrating the exhaust air suction of the painting workshop to ;
a dry defoaming body machine, wherein waste gas collected from is guided into a dry defoaming body machine for preliminary filtration, and paint mist in the waste gas is filtered;
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 (10)
1, kinds of coating exhaust-gas treatment processes, characterized by, including the following process steps:
spraying and introducing and filtering, namely arranging a plurality of air suction pipelines at the top of the coating room, introducing the 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 machine through a filtering pipeline to spray and filter the mixed waste gas to obtain organic waste gas;
organic waste gas adsorption, namely leading the organic waste gas discharged by a dry type defoaming machine into an adsorption container through an adsorption fan, and adsorbing the organic waste gas by an activated 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.
2. The kinds of coating waste gas treatment processes according to claim 1, further comprising a paint mist leveling process between the spray introduction filtering process and the organic waste gas adsorption, wherein the paint mist leveling process comprises introducing the organic waste gas filtered by the dry type defoaming machine into a duct of a spiral fan to form a spiral air flow, and then introducing the spiral air flow into the electromagnetic demisting container for thorough demisting, wherein a granular coagulant adding device and a water mist spraying device are arranged at the bottom of the electromagnetic demisting container, the granular coagulant at the bottom moves to the top of the electromagnetic demisting container with the water mist 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 air flow.
3. The kinds of coating waste gas treatment process according to claim 2, wherein the particulate coagulant comprises 12-18% of aluminum chloride, 5-11% of polyacrylamide, 16-25% of ferrous sulfate, 13-22% of sodium silicate, and 30-40% of magnetic powder.
4. The kinds of coating exhaust gas treatment process according to claim 1, wherein the desorption process 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.
5. The coating waste gas treatment process according to claim 4, wherein a condenser is used to separate organic waste gas from nitrogen gas in the mixed gas separation stage.
6. The coating waste gas treatment processes according to claim 1, wherein the organic waste gas treatment process flow comprises:
(1) in the high-temperature pretreatment stage, 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 segmented gradient heating, the th gradient heating temperature is 40-70 ℃, the second gradient heating temperature is 90-110 ℃, and the third gradient heating temperature is 150-180 ℃;
(2) the organic waste gas activity improving stage is that the organic waste gas after high temperature pretreatment is led into an activity excitation container, an ultraviolet irradiation device and a nickel ion membrane are arranged in the activity excitation container, and the organic waste gas passes through the nickel ion membrane in the ultraviolet irradiation and enters into next treatment stages;
(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.
7. The coating exhaust gas treatment process according to claim 6, wherein the nickel ion film forming process 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 film frame inIn the preparation chamber, 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.
8. The kinds of coating waste gas treatment process according to claim 6, wherein in the catalytic oxidation stage, the catalytic oxidant used comprises, by weight, 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.
9. The kinds of coating exhaust gas treatment processes of claim 1, wherein in the activated carbon adsorption device desorption process, a desorption container is used for desorption, 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 an -th 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);
a rotating assembly (50) comprising a rotating platform (51), a th connecting arm (54) and a second connecting arm (56), wherein the rotating platform (51) is movably arranged in a circular groove (11) formed in the upper end surface of the rack (10) through balls, a rotating shaft (52) fixed by a bearing is arranged on the lower surface of the rotating platform (51), the rotating shaft (52) is in transmission connection with a th motor (53) arranged on the lower surface of the rack (10), the end of the th connecting arm (54) is hinged with a lower connecting seat (59), the lower connecting seat (59) is fixed on the upper surface of the rotating platform (51), the other end of the th connecting arm (54) is hinged with the proximal end of a turnover plate (55), the turnover plate (55) is rotatably arranged on the side wall of the tank cover (40), the end of the second connecting arm (56) is hinged with a higher connecting seat (57), the higher connecting seat (57) is fixed on the upper surface of the rotating platform (51), the other end of the second connecting arm (56) is connected with the second connecting arm () through a second connecting arm (58), and the second connecting arm (54) is rotatably driven by a second connecting arm (58) and the second connecting arm (58) rotates around the axis of the second connecting arm (54);
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.
10, kinds of application exhaust-gas treatment system, characterized by, according to the treatment process include in proper order:
the air suction device is used for concentrating the exhaust air suction of the painting workshop to ;
a dry defoaming body machine, wherein waste gas collected from is guided into a dry defoaming body machine for preliminary filtration, and paint mist in the waste gas is filtered;
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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| CN104128059A (en) * | 2014-07-29 | 2014-11-05 | 罗建民 | Impinging stream gas purification system |
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| 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 |
| CN109513319A (en) * | 2018-12-05 | 2019-03-26 | 珠海力新环保有限公司 | A kind of waste gas treatment equipment and its waste gas processing method |
| 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. |