CN109647114B - Flue gas treatment system and process for high-polymer waterproof coiled material production line - Google Patents
Flue gas treatment system and process for high-polymer waterproof coiled material production line Download PDFInfo
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- CN109647114B CN109647114B CN201910071269.1A CN201910071269A CN109647114B CN 109647114 B CN109647114 B CN 109647114B CN 201910071269 A CN201910071269 A CN 201910071269A CN 109647114 B CN109647114 B CN 109647114B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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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
- B01D53/007—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 irradiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
Abstract
The invention discloses a flue gas treatment system of a high polymer waterproof coiled material production line and a treatment process thereof, and the flue gas treatment system comprises a flue gas collecting hood, a flue gas pipeline, a washing and filtering tower and a decomposing tower which are arranged side by side, wherein the top end of the flue gas collecting hood is communicated with a lower air inlet of the washing and filtering tower through the flue gas pipeline, an upper air outlet of the washing and filtering tower is communicated with a lower air inlet of the decomposing tower through a flue gas pipeline, an upper air outlet of the decomposing tower is provided with a discharge chimney, a negative pressure induced draft fan is arranged on the flue gas pipeline close to the lower air inlet of the decomposing tower, a cooling water pipeline is paved along the flue gas pipeline, a cleaning water pipeline is paved along the flue gas pipeline, a cooling spray nozzle is arranged in the cooling water pipeline, and a cleaning spray nozzle is arranged in the flue gas pipeline. The invention can collect, wash, filter and oxidize decomposition treatment the smoke gas when the macromolecule waterproof coiled material is produced, and discharge the smoke gas into the air, and is environment-friendly and pollution-free.
Description
Technical Field
The invention relates to the technical field of flue gas treatment of waterproof rolls, in particular to a flue gas treatment system and a flue gas treatment process for a high-polymer waterproof roll production line.
Background
The high molecular waterproof coiled material is a common building material in building construction, and the waterproof coiled material is required to be paved in advance in the construction of roads, bridges, tunnels, roofs or other buildings needing water prevention and seepage prevention. The production of the high polymer waterproof coiled material mainly adopts modified asphalt waterproof materials and other raw materials to carry out the preparation processes of stirring, mixing, heating, forming, dip-coating, film covering, sanding, conveying and the like, so as to prepare asphalt mixture meeting various process requirements for production and use.
A large amount of asphalt smoke generated in the production process has foul smell and strong pungent peculiar smell, and contains liquid tar and various gaseous organic matters, including various polycyclic aromatic hydrocarbon substances such as benzopyrene, indene, naphthalene, benzanthracene, carbazole and the like and solvent substances such as benzene, alcohols and the like, so that the treatment of the asphalt smoke is very necessary. The traditional treatment method is that after the generated oil fume is collected, the malodorous gas in the asphalt waste gas is sprayed and purified, condensed and recovered by oil gas, dedusted and recovered by dust, decomposed and burned by the fume or adsorbed by simple purification treatment equipment, and then is discharged at high altitude.
Disclosure of Invention
The invention aims to provide a flue gas treatment system and a treatment process for a high-polymer waterproof coiled material production line. In order to achieve the above object, the present invention adopts the following technical effects:
according to one aspect of the invention, the flue gas treatment system of the high polymer waterproof coiled material production line comprises one or more flue gas collecting hoods, a flue gas pipeline, a washing and filtering tower and a decomposing tower which are arranged side by side, wherein the flue gas pipeline comprises a plurality of air inlets, the top end of each flue gas collecting hood is communicated with the lower air inlet of the washing and filtering tower through the air inlet of the flue gas pipeline, the upper air outlet of the washing and filtering tower is communicated with the lower air inlet of the decomposing tower through a vertically arranged flue gas conveying pipeline, an exhaust chimney is arranged at the upper air outlet of the decomposing tower, a negative pressure draught fan is arranged on the flue gas conveying pipeline close to the lower air inlet of the decomposing tower, a cooling water pipeline is paved along the flue gas pipeline, a cleaning water pipeline is paved along the flue gas conveying pipeline, and a cooling spray head is arranged in the cooling water pipeline, the cooling spray head is communicated with the cooling water pipeline, a cleaning spray head is arranged in the smoke pipeline, the cleaning spray head is communicated with the cleaning water pipeline, and a drain pipe is arranged on a smoke exhaust pipeline close to a lower air inlet of the washing and filtering tower.
The above-mentioned scheme is further preferred, flue gas processing system still includes the circulating water pond, the income water end setting of cooling conduit is provided with circulating water pump on the cooling conduit who is close to circulating water pond one side in the circulating water pond, is provided with first drain outlet in the relative one side of the lower air inlet of washing filter tower, is provided with the second drain outlet in the relative one side of the lower air inlet of decomposition tower, first drain outlet and second drain outlet communicate with the circulating water pond respectively, the drain pipe with the circulating water pond intercommunication still be provided with the drain valve on the drain pipe.
In a further preferable mode of the above scheme, the horizontal height of the first sewage draining outlet is lower than the height of the lower air inlet of the washing and filtering tower, and the horizontal height of the second sewage draining outlet is lower than the height of the lower air inlet of the decomposing tower.
According to the scheme, the temperature sensor is preferably arranged in the smoke collecting hood.
In a further preferred embodiment of the above scheme, the washing and filtering tower comprises a filtering tower body, a magnetic ring spraying device arranged in the filtering tower body, a screen filtering layer, a flow guiding layer, an aluminum alloy filtering screen layer and a precision filtering layer, wherein the magnetic ring spraying device, the screen filtering layer, the flow guiding layer, the aluminum alloy filtering screen layer and the precision filtering layer are sequentially arranged upwards from the upper part of a lower air inlet of the filtering tower body, and the magnetic ring spraying device is communicated with the cleaning water pipeline; the decomposition tower is including decomposing the tower body and setting up high-pressure static oil trapping device, oil trap, ultraviolet photocatalytic cracking device and special accurate filter screen in the decomposition tower body, high-pressure static oil trapping device, oil trap, ultraviolet photocatalytic cracking device and accurate filter screen upwards set gradually from the top of the lower air inlet of decomposition tower body, accurate filter screen is formed the toper filter screen by 12 layers of stainless wire net extrusion preparation.
The above scheme is further preferred, silk screen filter layer top is provided with first spray set the water conservancy diversion layer top is provided with second spray set, first spray set and second spray set respectively with wash conduit intercommunication the lower air inlet of decomposition tower body with still be provided with the interceptor between the lower extreme of high-pressure static oil trap, just be located the lower extreme, the upper end department of high-pressure static oil trap on the lateral wall of decomposition tower body and be provided with third drain and fourth drain.
In a further preferable aspect of the above scheme, the flow guiding layer includes a first flow guiding plate, a second flow guiding plate, an isolation net, an upper annular condensation pipe, a middle annular condensation pipe, and a lower annular condensation pipe, wherein the isolation net is respectively disposed in the rings of the upper annular condensation pipe, the middle annular condensation pipe, and the lower annular condensation pipe, a plurality of first flow guiding plates are connected between the upper annular condensation pipe and the middle annular condensation pipe, a plurality of second flow guiding plates are connected between the middle annular condensation pipe and the lower annular condensation pipe, an included angle of 10 ° to 20 ° is formed between each first flow guiding plate, and an included angle of 10 ° to 20 ° is formed between each second flow guiding plate.
In a further preferable embodiment of the above solution, the upper end of the first baffle is connected to the center of the upper ring-shaped condenser pipe, the lower end of the first baffle is connected to the periphery of the edge of the middle ring-shaped condenser pipe, the upper end of the second baffle is connected to the center of the middle ring-shaped condenser pipe, the upper end of the second baffle is connected to the periphery of the edge of the middle ring-shaped condenser pipe, the lower end of the second baffle is connected to the center of the lower ring-shaped condenser pipe, and the upper end of the second baffle is located outside the lower end of the first baffle.
In a further preferable mode of the above scheme, the precision filter layer is a conical precision filter with a small upper end and a large lower end.
According to one aspect of the invention, the invention provides a treatment process of flue gas of a high-molecular waterproof coiled material production line, which comprises the following steps:
step 1: collecting flue gas, wherein a flue gas collecting hood collects oil stains, dust and flue gas generated on a waterproof coiled material production line, and the oil stains, dust and flue gas are conveyed to a lower air inlet of a filtering tower body along a smoke exhaust pipeline and are sucked into the filtering tower body from bottom to top under the action of high-speed airflow of a negative pressure induced draft fan;
step 2: spraying and filtering, when oil stain, dust and flue gas of high-speed airflow enter a lower air inlet of a filtering tower body, a magnetic ring spraying device downwards sprays washing liquid into the airflow to enable liquid foam of the washing liquid to perform high-speed reverse collision with the airflow so as to form a turbulent water curtain layer, redundant liquid foam of the washing liquid, water, oil stain, dust and flue gas sequentially pass through a screen filtering layer and a flow guide layer to remove liquid foam, pass through an aluminum alloy filtering net layer and a precise filtering layer to enable the water, oil stain and dust to be separated from the flue gas and discharged from a first sewage discharge port, and residual flue gas is sucked into the decomposing tower body from bottom to top through a flue gas conveying pipeline from the lower air inlet of the decomposing tower body;
and step 3: adsorbing, namely feeding the flue gas into a high-voltage electric field area of a high-voltage electrostatic oil catching device, applying direct-current high voltage between a corona electrode and a precipitation electrode of the high-voltage electrostatic oil catching device to discharge the corona electrode, wherein positive ions move towards the corona electrode to be neutralized, and in the process that negative ions move towards the precipitation electrode in a directional manner, oil stain particles are impacted to be negatively charged, so that the oil stain particles automatically flow to an oil collecting tank after being collected by the precipitation electrode;
and 4, step 4: oxidation catalysis and filtration, the residual flue gas is sent to an ultraviolet light catalytic cracking device for high-energy ultraviolet oxidation to generate water and CO2And is discharged from the discharge chimney 4 after being filtered by a special precise filter screen.
In a more preferred embodiment of the present invention, the height of the water curtain layer is 15mm to 25 mm.
In summary, due to the adoption of the technical scheme, the invention has the following technical effects:
(1) the flue gas treatment system can collect, wash, filter and oxidize and decompose the flue gas produced by the production line of the high-molecular waterproof coiled material, and discharge the flue gas into the air, so that the flue gas treatment system is environment-friendly and pollution-free; the combined type filtering method reduces the boiling point of the waste gas, so that water and oil in the asphalt flue gas are separated from the flue gas, and the possibility of spontaneous combustion and spontaneous explosion is eliminated.
(2) The invention effectively solves the problems of asphalt particles, harmful compounds, odor and irritant gas pollution of asphalt smoke by spraying, washing, cooling and purifying, then sequentially carrying out high-voltage electrostatic dust removal purification and ultraviolet light oxidation and reverse decomposition to generate low molecular compounds such as carbon dioxide, water and oxygen through a high-voltage electrostatic oil trapping device, an ultraviolet light catalytic cracking device and the like; the smoke treatment system has the advantages of reasonable structural design, reliable operation, stable performance, easy operation and investment saving.
Drawings
FIG. 1 is a schematic structural diagram of a flue gas treatment system of a high polymer waterproof roll production line of the present invention;
FIG. 2 is a schematic structural diagram of a current guiding layer according to the present invention
In the attached drawings, a smoke collecting hood 1, a discharge chimney 4, a negative pressure draught fan 5, a circulating water tank 6, a circulating water pump 7, a temperature sensor 8, a smoke exhaust pipeline 10, a smoke conveying pipeline 11, a cooling water conveying pipeline 12, a cleaning water conveying pipeline 13, an oil removal tank 60, a reaction tank 61, a filter tank 62, a water discharge pipe 100, a water discharge valve 101 and a cooling spray head 120;
washing the filter tower 2, the first sewage discharge port 20, the filter tower body 200, the magnetic ring spraying device 201, the silk screen filtering layer 202, the diversion layer 203, the aluminum alloy filtering net layer 204, the precision filtering layer 205, the first spraying device 2020, the second spraying device 203a, the first diversion plate 2030, the second diversion plate 2031, the separation net 2032, the upper annular condensation pipe 2033, the middle annular condensation pipe 2034 and the lower annular condensation pipe 2035;
the device comprises a decomposition tower 3, a second sewage draining outlet 30, a third sewage draining outlet 31, a fourth sewage draining outlet 32, a decomposition tower body 300, a high-voltage electrostatic oil catching device 301, an oil collecting tank 302, an ultraviolet light catalytic cracking device 303, a special precise filter screen 304, an interceptor 305 and a high-voltage direct current generating device 3010.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings by way of examples of preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
As shown in FIG. 1, the flue gas treatment system for the production line of the waterproof coiled material comprises one or more flue gas collecting hoods 1 installed above the production line of the waterproof coiled material, a flue gas pipeline 10, a washing and filtering tower 2 and a decomposing tower 3 installed side by side, wherein the flue gas pipeline 10 comprises a plurality of air inlets, the top end of the flue gas collecting hood 1 is communicated with the lower air inlet of the washing and filtering tower 2 through the air inlet of the flue gas pipeline 10, the upper air outlet of the washing and filtering tower 2 is communicated with the lower air inlet of the decomposing tower 3 through a vertically arranged flue gas pipeline 11, an exhaust chimney 4 is arranged at the upper air outlet of the decomposing tower 3, a negative pressure draught fan 5 is arranged on the flue gas pipeline 11 near the lower air inlet of the decomposing tower 3, a cooling water pipeline 12 is paved along the flue gas pipeline 10, a cleaning water pipeline 13 is paved along the flue gas pipeline 11, a cooling spray head 120 is arranged in the cooling water pipeline 12, the cooling spray head 120 is communicated with the cooling water pipeline 12, a cleaning spray head 130 is arranged in the smoke pipeline 11, the cleaning spray head 130 is communicated with the cleaning water pipeline 13, and a drain pipe 100 is arranged on the smoke exhaust pipeline 10 close to the lower air inlet of the washing and filtering tower 2; the flue gas treatment system also comprises a circulating water tank 6, the water inlet end of the cooling water pipeline 12 is arranged in the circulating water tank 6, a circulating water pump 7 is arranged on the cooling water pipeline 12 close to one side of the circulating water pool 6, a first drain outlet 20 is arranged on the opposite side of the lower air inlet of the washing and filtering tower 2, a second sewage draining exit 30 is arranged at the opposite side of the lower air inlet of the decomposing tower 3, the first sewage draining exit 20 and the second sewage draining exit 30 are respectively communicated with the circulating water tank 6, the water draining pipe 100 is communicated with the circulating water tank 6, the water discharge pipe 100 is also provided with a water discharge valve 101, the flue gas collection hood 1 is internally provided with a temperature sensor 8, when the temperature of the flue gas collected by the flue gas collection hood 1 is too high, the flue gas sent into the smoke exhaust pipeline 10 is cooled and dehumidified by starting and controlling the circulating water pump 7 and an electromagnetic valve (not shown) of the cooling water pipeline 12.
In the present invention, as shown in fig. 1, the horizontal height of the first drain outlet 20 is lower than the height of the lower air inlet of the washing and filtering tower 2, the horizontal height of the second drain outlet 30 is lower than the height of the lower air inlet of the decomposing tower 3, the bottom of the washing and filtering tower 2 is inclined toward the first drain outlet 20, the bottom of the decomposing tower 3 is inclined toward the second drain outlet 30, and the treated oil-contaminated liquid falls on the bottom, so that the oil-contaminated liquid can be easily drained from the drain outlet and conveyed into the circulating water tank 6 for recycling and utilization.
In the invention, as shown in fig. 1, the washing and filtering tower 2 comprises a filtering tower body 200, a magnetic ring spraying device 201, a wire mesh filtering layer 202, a flow guiding layer 203, an aluminum alloy filtering mesh layer 204 and a precision filtering layer 205 which are arranged in the filtering tower body 200, the magnetic ring spraying device 201, the wire mesh filtering layer 202, the flow guiding layer 203, the aluminum alloy filtering mesh layer 204 and the precision filtering layer 205 are arranged upwards in sequence from the upper part of a lower air inlet of the filtering tower body 200, the magnetic ring spraying device 201 is communicated with the cleaning water pipeline 13, flue gas sucked from the lower air inlet of the filtering tower body 200 is sprayed out by the magnetic ring spraying device 201 to enter air flow for spray washing and dehumidification cooling, magnetic rings in the magnetic ring spraying device 201 adsorb magnetic substances in the flue gas, thereby preventing excessive flue gas particle substances from being adhered to the wire mesh filtering layer 202 and further filtering by the wire mesh filtering layer 202, blocking substances such as impurities, and only allowing the redundant smoke and fog liquid to be subjected to subsequent treatment and recycling, wherein the impurities basically stay at the wire mesh filter layer 202 to increase the purification effect on the smoke, and the sprayed fog liquid falls into the bottom of the filter tower body 200 and is discharged from the first sewage discharge port 20 after being fully contacted with the smoke;
in the invention, as shown in fig. 1, a first spraying device 2020 is arranged above the wire mesh filter layer 202, a second spraying device 203a is arranged above the diversion layer 203, the first spraying device 2020 and the second spraying device 203a are respectively communicated with the cleaning water pipeline 13, and after the flue gas is treated, the wire mesh filter layer 202 and the diversion layer 203 can be cleaned by the first spraying device 2020 and the second spraying device 203 a; the first spraying device 2020 comprises a spraying pipeline and spray heads, the spraying pipeline is arranged above the screen filtering layer 202, one group or more than two groups of spray heads are arranged on the spraying pipeline 2021 and spray or spray the spray heads to the screen filtering layer 202 and the diversion layer 203 respectively, part of pollution in the smoke gas is washed off by adopting a spraying mode for dust, oil stain and smoke gas contained in the asphalt smoke gas, and when the filtering tower 2 is cleaned, maintained and washed, the residual oil stain on the screen filtering layer 202 and the diversion layer 203 is cleaned by spraying; the precision filter layer 205 is a conical precision filter with a small upper end and a large lower end, so that the cleaned and filtered flue gas can be conveniently and rapidly conveyed from an upper gas outlet of the washing and filtering tower 2 to a lower gas inlet of the decomposing tower 3 along the flue gas conveying pipeline 11 to be decomposed under the action of the negative pressure draught fan 5.
In the present invention, as shown in fig. 2, the flow guiding layer 203 includes a first flow guiding plate 2030, a second flow guiding plate 2031, a separation net 2032, an upper ring-shaped condensation pipe 2033, an intermediate ring-shaped condensation pipe 2034 and a lower ring-shaped condensation pipe 2035, wherein the separation net 2032 is disposed in the ring shape of the upper ring-shaped condensation pipe 2033, the intermediate ring-shaped condensation pipe 2034 and the lower ring-shaped condensation pipe 2035, respectively, a plurality of first flow guiding plates 2030 are connected between the upper ring-shaped condensation pipe 2033 and the intermediate ring-shaped condensation pipe 2034, a plurality of second flow guiding plates 2031 are connected between the intermediate ring-shaped condensation pipe 2034 and the intermediate ring-shaped condensation pipe 2035, an included angle between each first flow guiding plate 2030 and an included angle between each second flow guiding plate 2031 range from 10 ° to 20 °, an upper end of the first flow guiding plate is connected near the center of the upper ring-shaped condensation pipe 2033, a lower end of the first flow guiding plate is connected near the edge of the intermediate ring-shaped condensation pipe 2034, an upper end of the second flow guiding plate 2030 is connected near the center of the intermediate ring-shaped condensation pipe 2034, the upper end of the second guide plate 2031 is connected around the edge close to the middle ring-shaped condenser pipe 2034, the lower end of the second guide plate 2031 is connected near the center of the lower ring-shaped condenser pipe 2035, and the upper end of the second guide plate 2031 is outside the lower end of the first guide plate 2030 and close to the inner wall of the filtration tower 200; every layer of annular layer condenser pipe is "back" setting by two or more than two, and set up the separation net and be the silk screen structure between annular layer condenser pipe, because be mingled with the flue gas of water smoke and high-speed upward movement in the flue gas, can intercept the moisture in the flue gas through annular layer condenser pipe and separation net, and cross through the flow in every layer of guide plate gap, gas-liquid area of contact has been increased, and change the direction of flue gas operation, because moisture is less, thereby adhere on adhesion layer condenser pipe and separation net, the purifying effect to the flue gas has been increased like this. The water is guided by the guide plate to gradually gather into larger water drops and drop to the bottom of the filtering tower body 200.
In the invention, as shown in fig. 1, the decomposition tower 3 comprises a decomposition tower body 300, and a high-voltage electrostatic oil trapping device 301, an oil collecting tank 302, an ultraviolet catalytic cracking device 303 and a special precision filter screen 304 which are arranged in the decomposition tower body 300, wherein the high-voltage electrostatic oil trapping device 301, the oil collecting tank 302, the ultraviolet catalytic cracking device 303 and the precision filter screen 304 are sequentially arranged upwards from the upper part of a lower air inlet of the decomposition tower body 300, the precision filter screen 304 is a conical filter screen formed by extruding 12 layers of stainless steel screens, and a third sewage outlet 31 and a fourth sewage outlet 32 are arranged on the side wall of the decomposition tower body 300 and positioned at the lower end and the upper end of the high-voltage electrostatic oil trapping device 301. In the minuteThe lower air inlet of tower body 300 and still be provided with interceptor 305 between the lower extreme of high-pressure electrostatic oil trapping device 301, interceptor 305 comprises defogging packing layer and a plurality of pivoted fan blade (not shown), negative pressure draught fan 5 adsorbs the pitch waste gas of coiled material production to wash and filter 2 washing of washing filter tower and send into the lower of decomposition tower 3 and admit air, moisture and fog in the flue gas after washing filter treatment are adsorbed to the fog packing layer, the fan blade is autogiration under the high-speed flue gas effect, and the flue gas after washing filter treatment is high-speed upward movement under the effect of negative pressure draught fan 5 by the partial particulate matter in the flue gas of fan blade interception and patting, unnecessary flue gas granule upwards pushes away to catching oil device 301 with high-pressure electrostatic in the wind blade rotation process, high-voltage direct current electricity generator 3010 and positive among the high-pressure electrostatic oil trapping device 301, Negative electrode rods (a corona electrode and a precipitation electrode), wherein high-voltage direct current voltage of the high-voltage direct current generator 3010 is applied to the corona electrode and the precipitation electrode, smoke particles move towards the corona electrode and the precipitation electrode under the action of electric field force, the smoke particles are ionized under the action of a high-voltage electric field to remove oil and dust in smoke, the oil and dust in the smoke and the water mist are degraded to generate carbon dioxide and water, most of smoke, oil and dust and particles with odor are removed and are discharged from the second sewage discharge outlet 30 and the third sewage discharge outlet 31 respectively, discharged waste is sent into the circulating water tank 6 to be recycled, and the rest smoke is oxidized by high-energy ultraviolet rays in the ultraviolet catalytic cracking device 303, and high-energy ultraviolet ray beams, air and TiO are oxidized by high-voltage direct current in the ultraviolet catalytic cracking device 3032Ozone and OH (hydroxyl radical) generated by the reaction carry out a synergistic decomposition oxidation reaction on organic gas, so that a chain structure of macromolecular organic gas is broken under the action of ultraviolet rays, organic gas substances are converted into tasteless small molecular compounds or completely mineralized, moisture and oxygen in the surface of exhaust gas odor are used as oxidants, toxic organic smoke particulate matters are effectively degraded, malodorous compounds in smoke are subjected to oxidation reaction to generate water and low molecular oxides, purified gas is completed, oxidized smoke particles and oil stains fall into an oil collecting tank 302 and are discharged from a fourth sewage outlet 32 to a circulating water tank 6 for recovery treatment; the treated flue gas is processed by a negative pressure draught fan 5The special precision filter screen 304 is used for feeding the flue gas into the special precision filter screen 304, peculiar smell in the flue gas is eliminated through the special precision filter screen 304, the special precision filter screen 304 effectively blocks and purifies the flue gas, the flue gas is discharged from the discharge chimney 4 after being filtered to reach the environmental protection discharge standard, the flue gas concentration and the flue gas smell are reduced to the environmental protection requirement, the influence on the surrounding environment is eliminated, after the flue gas is treated, the valve 80 between the top end of the flue gas collecting hood 1 and the smoke exhaust pipeline 10 is closed, the cooling spray head 120, the cleaning spray head 130, the spray head of the magnetic ring spray device 201, the spray head of the first spray device 2020 and the spray head of the second spray device 203a are opened for cleaning, water vapor is dried for more than 20 hours under the action of a negative pressure induced draft fan 5, the flue gas treatment can be carried out again, the circulating water tank 6 comprises an oil removal tank 60, a reaction tank 61 and a filter tank 62 which are distributed in a step shape, first drain 20, second drain 30, third drain 31 and drain 100 exhaust discarded object and greasy dirt are sent into and are carried out the layering separation in the deoiling pond 60, get rid of sump oil and tiny particle in the sewage, then discharge into reaction tank 61 and add the impurity of medicament in order to deposit the sewage, then discharge into in the filtering ponds 62 and adsorb repeatedly, filter, discharge up to standard waste water at last, cooling conduit 12 communicates to in the filtering ponds 62, circulating water pump 7 is cooled down in introducing exhaust pipe 10 through cooling conduit 12 with the water after the filtration treatment.
Referring to fig. 1, according to another aspect of the present invention, the present invention provides a process for treating flue gas in a production line of waterproof polymer rolls, comprising the following steps:
step 1: collecting flue gas, namely collecting oil stains, dust and flue gas generated on a waterproof coiled material production line by a flue gas collection hood 1 to prevent the flue gas from leaking out, and conveying the oil stains, dust and flue gas to a lower air inlet of a filtering tower body 200 along a flue gas discharge pipeline 10 and sucking the oil stains, dust and flue gas into the filtering tower body 200 from bottom to top under the action of high-speed airflow of a negative pressure draught fan 5 with the air volume of 26000 m/h;
step 2: spraying and filtering, when oil stain, dust and smoke of high-speed airflow enter a lower air inlet of a filtering tower body 200, a magnetic ring spraying device 201 downwards sprays cleaning solution into the airflow to enable liquid foam of the cleaning solution to reversely collide with the airflow at high speed so as to form a turbulent water curtain layer, the height of the water curtain layer is 15-25 mm, and a spiral spray head is adopted to atomize water and concentrate the dust and the oil stain to a circulating water tank; the redundant liquid foam of the washing liquid, water, oil stain, dust and flue gas sequentially pass through the wire mesh filter layer 202 and the flow guide layer 203 to remove the liquid foam, pass through the aluminum alloy filter mesh layer 204 and the precision filter layer 205 to separate the water, the oil stain and the dust from the flue gas and discharge the flue gas from the first sewage discharge port 20, and the residual flue gas is sucked into the decomposing tower body 300 from the lower air inlet of the decomposing tower body 300 from bottom to top through the smoke conveying pipeline 11; the flue gas containing oil stain and dust enters the filtering tower body 200 from the lower air inlet of the filtering tower body 200 from bottom to top, the washing liquid is sprayed into the airflow from top to bottom through the nozzle of the magnetic ring spraying device 201 to cause the high-speed reverse collision of gas-liquid phases, when the momentum of the gas-liquid phases reaches balance, a highly turbulent water curtain layer is formed, the gas-liquid phases are in high-speed turbulent flow contact in a water curtain area, so that the contact surface area is extremely large, the contact surfaces are continuously and rapidly updated to achieve the effects of rapid cooling and efficient washing, in addition, according to the characteristic that the gas-liquid phases flow downstream above the water curtain layer, the gas-liquid phases are subjected to turbulent flow mixing again to play a role of countercurrent washing, the purified gas is discharged from the upper air outlet pipe of the filtering tower body 200 after entrained liquid foam is removed through the screen filtering layer 202 and the flow guiding layer 203, the boiling point of the waste gas is reduced by adopting combined filtering, water and oil smoke in the asphalt smoke are separated from the gas, and the possibility of spontaneous combustion and spontaneous explosion is eliminated; small part of oil stains are prevented from being brought into the high-voltage electrostatic oil catching device 301 together through the volatilization of water, the high-voltage electrostatic trapping and discharging effect is influenced, and relatively dry smoke is ensured to enter the high-voltage electrostatic oil catching device 301;
and step 3: adsorbing, namely feeding the flue gas into a high-voltage electric field area of a high-voltage electrostatic oil catching device 301, applying direct-current high voltage between a corona electrode and a precipitation electrode of the high-voltage electrostatic oil catching device 301 to discharge the corona electrode, wherein positive ions move towards the corona electrode to be neutralized, and in the process of directional movement towards the precipitation electrode, negative ions impact oil stain particles to make the oil stain particles have negative electricity, so that the oil stain particles automatically flow to an oil collecting tank 302 after being collected by the precipitation electrode;
and 4, step 4: oxidation catalysis and filtration, the residual flue gas is sent to an ultraviolet catalytic cracking device 303 for high-energy ultraviolet oxidation to generate water and CO2And the water vapor is filtered by a special precise filter screen 304 and then discharged from the discharge chimney 4, wherein the precise filter screen 304 is a conical precise filter with a small upper end and a large lower end, and the water vapor is rapidly formed into water vapor flow to the oil collecting tank 302 and discharged to the circulating water pool 6 for recycling through a high-density conical precise filter.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (7)
1. The utility model provides a polymer waterproofing membrane production line flue gas processing system which characterized in that: the flue gas treatment system comprises one or more flue gas collection hoods (1) and exhaust pipes (10) arranged above a waterproof coiled material production line, a washing filter tower (2) and a decomposition tower (3) which are arranged side by side, wherein each exhaust pipe (10) comprises a plurality of air inlets, the top end of each flue gas collection hood (1) is communicated with the lower air inlet of the washing filter tower (2) through the air inlets of the exhaust pipes (10), the upper air outlet of the washing filter tower (2) is communicated with the lower air inlet of the decomposition tower (3) through vertically arranged smoke conveying pipes (11), a discharge chimney (4) is arranged at the upper air outlet of the decomposition tower (3), a negative pressure draught fan (5) is arranged on each smoke conveying pipe (11) close to the lower air inlet of the decomposition tower (3), and a cooling water conveying pipe (12) is paved along the exhaust pipes (10), a cleaning water pipeline (13) is laid along the smoke pipeline (11), a cooling spray head (120) is arranged in the cooling water pipeline (12), the cooling spray head (120) is communicated with the cooling water pipeline (12), a cleaning spray head (130) is arranged in the smoke pipeline (11), the cleaning spray head (130) is communicated with the cleaning water pipeline (13), and a drain pipe (100) is arranged on a smoke discharge pipeline (10) close to a lower air inlet of the washing and filtering tower (2); the flue gas treatment system further comprises a circulating water tank (6), the water inlet end of the cooling water pipeline (12) is arranged in the circulating water tank (6), a circulating water pump (7) is arranged on the cooling water pipeline (12) close to one side of the circulating water tank (6), a first sewage discharge port (20) is arranged on one side, opposite to the lower air inlet, of the washing and filtering tower (2), a second sewage discharge port (30) is arranged on one side, opposite to the lower air inlet, of the decomposition tower (3), the first sewage discharge port (20) and the second sewage discharge port (30) are respectively communicated with the circulating water tank (6), the drain pipe (100) is communicated with the circulating water tank (6), and a drain valve (101) is further arranged on the drain pipe (100); the horizontal height of the first sewage draining outlet (20) is lower than that of a lower air inlet of the washing and filtering tower (2), and the horizontal height of the second sewage draining outlet (30) is lower than that of a lower air inlet of the decomposing tower (3);
the washing and filtering tower (2) comprises a filtering tower body (200), a magnetic ring spraying device (201) arranged in the filtering tower body (200), a silk screen filtering layer (202), a flow guide layer (203), an aluminum alloy filtering net layer (204) and a precision filtering layer (205), wherein the magnetic ring spraying device (201), the silk screen filtering layer (202), the flow guide layer (203), the aluminum alloy filtering net layer (204) and the precision filtering layer (205) are sequentially arranged upwards from the upper part of a lower air inlet of the filtering tower body (200), and the precision filtering layer (205) is a conical precision filter with a small upper end and a large lower end; the magnetic ring spraying device (201) is communicated with the cleaning water pipeline (13); the decomposition tower (3) comprises a decomposition tower body (300), and a high-voltage electrostatic oil catching device (301), an oil collecting tank (302), an ultraviolet catalytic cracking device (303) and a special precise filter screen (304) which are arranged in the decomposition tower body (300), wherein the high-voltage electrostatic oil catching device (301), the oil collecting tank (302), the ultraviolet catalytic cracking device (303) and the precise filter screen (304) are sequentially arranged upwards from the upper part of a lower air inlet of the decomposition tower body (300), and the precise filter screen (304) is a conical filter screen formed by extruding 12 layers of stainless steel wire meshes; silk screen filter layer (202) top is provided with first spray set (2020) conduction layer (203) top is provided with second spray set (203a), first spray set (2020) and second spray set (203a) respectively with wash conduit (13) intercommunication the lower air inlet of decomposition tower body (300) with still be provided with interceptor (305) between the lower extreme of high-pressure electrostatic oil trapping device (301), just be located the lower extreme, the upper end department of high-pressure electrostatic oil trapping device (301) and be provided with third drain (31) and fourth drain (32) on the lateral wall of decomposition tower body (300).
2. The flue gas treatment system for the high-molecular waterproof coiled material production line according to claim 1, characterized in that: a temperature sensor (8) is arranged in the smoke collecting hood (1).
3. The flue gas treatment system for the high-molecular waterproof coiled material production line according to claim 1, characterized in that: the flow guide layer (203) comprises first flow guide plates (2030), second flow guide plates (2031), a separation net (2032), an upper annular condensation pipe (2033), a middle annular condensation pipe (2034) and a lower annular condensation pipe (2035), wherein the separation net (2032) is respectively arranged in the rings of the upper annular condensation pipe (2033), the middle annular condensation pipe (2034) and the lower annular condensation pipe (2035), a plurality of first flow guide plates (2030) are connected between the upper annular condensation pipe (2033) and the middle annular condensation pipe (2034), a plurality of second flow guide plates (2031) are connected between the middle annular condensation pipe (2034) and the lower annular condensation pipe (2035), an included angle of 10-20 degrees is formed between each first flow guide plate (2030), and an included angle of 10-20 degrees is formed between each second flow guide plate (2031).
4. The high molecular waterproof coiled material production line flue gas treatment system of claim 3, wherein: the upper end of the first guide plate (2030) is connected to the position close to the center of the upper annular condenser pipe (2033), the lower end of the first guide plate (2030) is connected to the position close to the periphery of the middle annular condenser pipe (2034), the upper end of the second guide plate (2031) is connected to the position close to the center of the middle annular condenser pipe (2034), the upper end of the second guide plate (2031) is connected to the position close to the periphery of the middle annular condenser pipe (2034), the lower end of the second guide plate (2031) is connected to the position close to the center of the lower annular condenser pipe (2035), and the upper end of the second guide plate (2031) is arranged outside the lower end of the first guide plate (2030).
5. The flue gas treatment system for the high-molecular waterproof coiled material production line according to claim 1, characterized in that: the circulating water tank (6) is composed of an oil removal tank (60), a reaction tank (61) and a filtering tank (62) which are distributed in a stepped shape.
6. A flue gas treatment process using the flue gas treatment system of the high polymer waterproof roll production line, which is characterized in that: the method comprises the following steps:
step 1: the method comprises the following steps of (1) collecting flue gas, wherein the flue gas collecting hood (1) collects oil stains, dust and flue gas generated on a waterproof coiled material production line, and under the action of high-speed airflow of a negative pressure induced draft fan (5), the oil stains, the dust and the flue gas are conveyed to a lower air inlet of a filtering tower body (200) along a smoke exhaust pipeline (10) and are sucked into the filtering tower body (200) from bottom to top;
step 2: spraying and filtering, when oil stain, dust and flue gas of high-speed airflow enter a lower air inlet of a filtering tower body (200), a magnetic ring spraying device (201) downwards sprays washing liquid into the airflow to enable liquid foam of the washing liquid to reversely collide with the airflow at high speed so as to form a turbulent water curtain layer, redundant liquid foam of the washing liquid, water, oil stain, dust and flue gas sequentially pass through a screen filtering layer (202) and a flow guide layer (203) to remove the liquid foam, pass through an aluminum alloy filtering screen layer (204) and a precise filtering layer (205), enable the water, oil stain and dust to be separated from the flue gas and discharged from a first drain outlet (20), and the residual flue gas is sucked into the decomposing tower body (300) from bottom to top through a smoke conveying pipeline (11) from the lower air inlet of the decomposing tower body (300);
and step 3: adsorbing, namely feeding the flue gas into a high-voltage electric field area of a high-voltage electrostatic oil catching device (301), applying direct-current high voltage between a corona electrode and a precipitation electrode of the high-voltage electrostatic oil catching device (301) to discharge the corona electrode, wherein positive ions move towards the corona electrode to be neutralized, and in the process of directional movement of negative ions towards the precipitation electrode, oil stain particles are impacted to be negatively charged, and then automatically flow to an oil collecting tank (302) after being collected by the precipitation electrode;
and 4, step 4: oxidation catalysis and filtration, the residual flue gas is sent to an ultraviolet catalytic cracking device (303) for high-energy ultraviolet oxidation to generate water and CO2And is discharged after being filtered by a special precise filter screen (304)And (4) discharging from a chimney.
7. The flue gas treatment process according to claim 6, wherein: the height of the water curtain layer is 15 mm-25 mm.
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