CN109260943B - Waste plastic processing waste gas treatment process and complete equipment - Google Patents
Waste plastic processing waste gas treatment process and complete equipment Download PDFInfo
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- CN109260943B CN109260943B CN201810682622.5A CN201810682622A CN109260943B CN 109260943 B CN109260943 B CN 109260943B CN 201810682622 A CN201810682622 A CN 201810682622A CN 109260943 B CN109260943 B CN 109260943B
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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
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
Abstract
The invention discloses a waste plastic processing waste gas treatment process and complete equipment, wherein the production process comprises the following steps: 1) dust removal: the pollution to the catalyst of the subsequent process is avoided; 2) degrading polluted waste gas: the polluted waste gas is reacted in a photocatalysis chamber and degraded into nontoxic and harmless gas; 3) and (3) separating purified gas from the catalyst: the gas circuit is controlled by the valve device and cooperates with the magnetic field of the magnetic field chamber to realize the circulation of purified gas and catalyst; 4) reduction of excess ozone: the purified gas is discharged from the magnetic field chamber and passes through the reduction filling layer to realize the reduction of the redundant ozone. The devices of the whole set of equipment are reasonably matched, waste gas is effectively purified, and secondary pollution is not generated in the treatment process.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a waste gas treatment process and equipment for waste plastic processing.
Background
Plastic products are applied in various fields, including the aspects of building industry, transportation, packaging, agriculture, daily necessities, medical treatment and the like, and the current life is still not opened by plastics. With the rapid development of the yield of Chinese plastic products, the disposal of the waste plastics is gradually changed from traditional landfill and incineration to recycling. However, the waste plastic processing process generates a series of high-concentration toxic and harmful waste gas problems, which seriously harm the health of workers and influence the air quality. Therefore, a technology and equipment for waste gas treatment in waste plastic processing are urgently needed.
The existing waste gas treatment technology has high treatment cost or low efficiency for treating high-concentration waste gas, the photocatalysis technology is a green technology for treating waste gas, has wide treatment range, mild conditions and simple equipment, is expected to be applied to waste gas treatment in waste plastic processing, but the existing photocatalysis technology has the following defects:
firstly, the photocatalysis treatment time is short, the waste gas with large air quantity and high concentration is difficult to effectively remove, the waste gas generated by waste plastic processing has large concentration, the treatment efficiency is low by using a single photocatalysis technology, and the purified waste gas is difficult to reach the emission standard.
Second, the combined photocatalytic technology greatly reduces the concentration of the exhaust gas subjected to photocatalytic treatment by combining other technologies, but generally requires the use of a spray device or the like, is likely to cause secondary pollution, causes pollution transfer, and is not the final target of exhaust gas treatment.
In conclusion, the existing photocatalysis technology is difficult to realize low-cost treatment on waste gas generated in waste plastic processing, and simultaneously does not generate secondary pollution, so that the waste gas treatment technology which is in line with economy and environmental protection is researched and invented, and the waste plastic is beneficial to promoting the recycling of waste plastics.
Disclosure of Invention
The invention aims to provide a waste plastic processing waste gas treatment process and complete equipment aiming at the difficult problems in the industries.
The invention aims to realize that a waste plastic processing waste gas treatment complete equipment comprises a dust removal device, a cooling water circulation system, a photocatalytic chamber, a valve device, a double magnetic field chamber, a reduction filling layer, a storage bin and an ozone generator in sequence, and is characterized in that the dust removal device comprises a shell, the top of the shell is provided with a waste gas inlet, the inner cavity of the shell is provided with a plurality of baffles which are arranged in parallel in an inclined direction, the inclined direction is that the left side faces downwards and the right side faces upwards, an electrostatic adsorption dust collection plate is arranged below the baffle which is positioned at the lowest surface in the inner cavity of the shell, the bottom of the shell opposite to the electrostatic adsorption dust collection plate is provided with a dust outlet, and the outer side of the bottom of the shell is provided with a waste gas outlet; a cooling water inlet and a cooling water outlet of a cooling water circulating system are connected around the dust removal device, and the temperature of the waste gas can be effectively reduced through cooling of the cooling water circulating system; the waste gas enters a dust removal device for dust removal, the dust-removed waste gas is discharged from the dust removal device, enters a mixing pipeline shared by the waste gas, the ozone and the magnetic photocatalyst together with ozone and the magnetic photocatalyst, is mixed and then enters a photocatalysis chamber, the ozone is generated by an ozone generator and then enters the mixing pipeline shared by the waste gas, the ozone and the magnetic photocatalyst through an outlet of the ozone generator and an outlet of a storage bin, the initial magnetic photocatalyst is added into the storage bin through a feed inlet, is taken out from the outlet of the storage bin by the ozone and enters the mixing pipeline shared by the waste gas, the ozone and the magnetic photocatalyst together; the photocatalysis room is connected with the valve device, and the gas after purification gets into the valve device, and the valve device connects two magnetic field rooms, and two magnetic field rooms are equipped with two mutual noninterference's magnetic field room, and every magnetic field room is equipped with two exports, and the gas that the export of every magnetic field room was come out gets into the reduction filling layer from the top, discharges at last, and magnetism photocatalyst drops the feed bin from the bottom.
The double-magnetic-field chamber comprises a first magnetic-field chamber and a second magnetic-field chamber, the first magnetic-field chamber and the second magnetic-field chamber are separated by a baffle plate, a first magnetic-field plate is arranged in the first magnetic-field chamber, and a first gas outlet of the first magnetic-field chamber is arranged on the top surface of the first magnetic-field chamber; a second magnetic field plate is arranged in the second magnetic field chamber, a gas outlet of the second magnetic field chamber is arranged on the top surface of the second magnetic field chamber, the bottoms of the first magnetic field chamber and the second magnetic field chamber are connected to the storage bin, the magnetic field of the magnetic field plate in the first magnetic field chamber adopts an electromagnetic field, a magnetic field is generated after the magnetic field is electrified, and the magnetic photocatalyst is adsorbed on the magnetic field plate; after power failure, the photocatalyst on the outer layer gradually falls off under the action of gravity until the magnetic photocatalyst completely falls off, and the magnetic photocatalyst enters a storage bin to be recycled; when an outlet I of the valve device is communicated with a mixing pipeline shared by the waste gas, the ozone and the magnetic photocatalyst and a magnetic field chamber I, the magnetic field chamber I operates, the gas and the magnetic photocatalyst enter the magnetic field chamber I, the magnetic photocatalyst is adsorbed on a magnetic field plate I, the gas is discharged from a gas outlet of the magnetic field chamber I, passes through a reduction filling layer arranged at a gas outlet of the magnetic field chamber I, is used for reducing redundant ozone, and is finally discharged into the atmosphere; when the valve device is turned to the second outlet, the first outlet of the valve device is closed, the first magnetic field chamber stops working, the magnetic photocatalyst falls off from the first magnetic field plate and enters the bin, the second outlet of the valve device is communicated with the second magnetic field chamber through a mixing pipeline shared by the waste gas, the ozone and the magnetic photocatalyst, the second magnetic field chamber operates, purified gas and the magnetic photocatalyst enter the second magnetic field chamber, the magnetic photocatalyst is adsorbed on the second magnetic field plate, the gas is discharged from the gas outlet of the second magnetic field chamber, redundant ozone is reduced through the reduction filling layer, and finally the gas is discharged into the atmosphere.
The feed bin is provided with a feed inlet, an ozone inlet and a feed bin outlet, ozone generated by the ozone generator enters the feed bin from the ozone inlet, the magnetic photocatalyst is added into the feed bin from the feed inlet, and the ozone and the magnetic photocatalyst can enter the photocatalytic chamber from the feed bin outlet of the feed bin.
The invention relates to a process for treating waste gas generated in waste plastic processing, which comprises the following steps: 1) waste gas dust removal in waste plastic processing: the magnetic photocatalyst is used for avoiding the pollution of waste gas in waste plastic processing to subsequent processes; 2) degrading polluted waste gas by using a magnetic photocatalyst: the waste plastic processing gas after dust removal enters a photocatalysis chamber for reaction and is degraded into nontoxic and harmless gas; 3) separating purified gas from the magnetic catalyst: the gas circuit is controlled by a valve device, the gas circuit and the magnetic field of the magnetic field chamber work cooperatively, purified gas and the magnetic photocatalyst are introduced into the magnetic field chamber, the separation of the purified gas and the magnetic photocatalyst is realized, and the magnetic photocatalyst is recycled; 4) reduction of excess ozone: the purified gas is discharged from the magnetic field chamber and passes through the reduction filling layer to realize the reduction of the redundant ozone.
The waste plastic processing waste gas dust removal is to perform waste gas dust removal through the reverse inertial dust remover and the electrostatic adsorption integrated device, and the dust removal effect can be obviously improved through the synergistic effect of the reverse inertial dust remover and the electrostatic adsorption integrated device.
The dust collector is provided with a cooling water circulation system, and the temperature of the waste gas can be effectively reduced through cooling of the cooling water circulation system.
The waste gas is mixed with the magnetic photocatalyst, so that the degradation time of the waste gas is prolonged.
Ozone assists photocatalysis, and catalytic efficiency is improved.
The reduction filling layer is loaded with transition metal oxide to reduce a small amount of redundant odor.
The magnetic field of the magnetic field plate in the magnetic field chamber adopts an electromagnetic field, and generates a magnetic field after being electrified, and the magnetic photocatalyst is adsorbed on the magnetic field plate; after the power is cut off, the photocatalyst on the outer layer gradually falls off under the action of gravity until the magnetic photocatalyst completely falls off, and the magnetic photocatalyst enters a storage bin to be recycled.
The concrete description is as follows: 1. the invention discloses a reverse inertial dust collector and electrostatic adsorption integrated device, which comprises a shell, wherein a waste gas inlet is formed in the top of the shell, a plurality of baffles which are obliquely and upwardly arranged in parallel are arranged in an inner cavity of the shell, an electrostatic adsorption dust collection plate is arranged below the lowest baffle in the inner cavity of the shell, a dust outlet is formed in the bottom of the shell opposite to the waste gas inlet, and a waste gas outlet is formed in the outer side of the bottom of the shell, so that the dust can be efficiently removed.
2. The invention discloses a double-magnetic-field chamber, which is provided with two non-interfering magnetic field chambers, namely a magnetic field chamber I and a magnetic field chamber II, wherein a baffle is arranged between the magnetic field chamber I and the magnetic field chamber II for separation, a magnetic field plate I is arranged in the magnetic field chamber I, and a gas outlet of the magnetic field chamber I is arranged on the top surface of the magnetic field chamber I; a second magnetic field plate is arranged in the second magnetic field chamber, a second gas outlet of the second magnetic field chamber is arranged on the top surface of the second magnetic field chamber, and the bottoms of the first magnetic field chamber and the second magnetic field chamber are connected to the storage bin; when an outlet I of the valve device is communicated with a mixing pipeline shared by the waste gas, the ozone and the magnetic photocatalyst and a magnetic field chamber I, the magnetic field chamber I operates, the gas and the photocatalyst enter the magnetic field chamber I, the magnetic photocatalyst is adsorbed on a magnetic field plate I, the gas is discharged from a gas outlet of the magnetic field chamber I, then passes through a reduction filling layer arranged at a gas outlet of the magnetic field chamber I, reduces redundant ozone, and finally is discharged into the atmosphere; when the valve device rotates to the other position, the first outlet of the valve device is closed, the first magnetic field chamber stops working, and the magnetic photocatalyst falls off from the first magnetic field plate and enters the storage bin. The separation of gas and magnetic photocatalyst is realized through the alternate work of the two magnetic field chambers, and the photocatalyst is recycled.
3. A waste plastic processing waste gas treatment process is characterized by comprising the following steps: 1) dust removal: large particles and fine dust are removed simultaneously, so that the influence on the subsequent mixing with the catalyst is avoided; 2) degrading polluted waste gas: the polluted waste gas, the ozone and the magnetic photocatalyst react in the photocatalysis chamber, and the polluted waste gas is degraded into non-toxic and harmless gas; 3) and (3) separating purified gas from the catalyst: the gas circuit is controlled by the valve device, and the magnetic field of the corresponding magnetic field chamber operates to realize the separation of purified gas and catalyst; 4) and (3) circulation of the catalyst: the gas circuit is controlled by the rotating wheel device, the magnetic field which works before stops running, the catalyst falls off and falls into the bottom, and enters the photocatalytic chamber to be circulated again by being pushed by ozone; 5) reduction of excess ozone: the purified gas is discharged from the magnetic field chamber and passes through the reduction filling layer to realize the reduction of the redundant ozone.
The dust removal device is connected with a cooling water circulation system, the bottom of the dust removal device is provided with a cooling water inlet, and the top of the dust removal device is provided with a cooling water outlet.
The waste gas and the photocatalyst are mixed in the photocatalytic chamber, and the photocatalyst catalyzes, oxidizes and degrades pollutants on the waste gas from the inlet of the photocatalytic chamber to the outlet of the photocatalytic chamber, so that the photocatalytic action time is effectively prolonged. Meanwhile, ozone is adopted to assist photocatalysis, so that the photocatalysis effect is improved, and the waste gas purification efficiency is greatly improved.
The valve device is provided with two outlets, wherein the outlet I is connected with the magnetic field chamber I, the outlet II is connected with the magnetic field chamber II, the valve switching can be set according to the gas flow rate, the two outlets are provided with one pipeline and are communicated with one another, and the valve device is a technology which can be realized by general technicians.
The ozone generated by the ozone generator plays an auxiliary role in photocatalysis and also plays a role of carrier gas, and the ozone with the magnetic photocatalyst enters the photocatalysis chamber together.
The reduction filling layer reduces redundant ozone, and cannot pollute the environment.
The invention has the characteristics and advantages that: 1) dust removal: the pollution to the catalyst of the subsequent process is avoided; 2) degrading polluted waste gas: the polluted waste gas is reacted in a photocatalysis chamber and degraded into nontoxic and harmless gas; 3) and (3) separating purified gas from the catalyst: the gas circuit is controlled by the valve device and cooperates with the magnetic field of the magnetic field chamber to realize the circulation of purified gas and catalyst; 4) reduction of excess ozone: the purified gas is discharged from the magnetic field chamber and passes through the reduction filling layer to realize the reduction of the redundant ozone. The devices of the whole set of equipment are reasonably matched, waste gas is effectively purified, and secondary pollution is not generated in the treatment process.
Drawings
FIG. 1 is a schematic view of the structure of a waste plastic processing facility. In the figure, 1 is a dust removal device, 2 is a cooling water inlet, 3 is a cooling water outlet, 4 is a common mixing pipeline for waste gas, ozone and magnetic photocatalyst, 5 is a photocatalytic chamber, 6 is an ultraviolet light source, 7 is a valve device, 8 is an outlet I, 9 is an outlet II, 10 is a double-magnetic-field chamber, 11 is a reduction filling layer, 12 is a storage bin, 13 is a feeding port, and 14 is an ozone generator.
FIG. 2 is a schematic view of a reverse inertial dust collector and electrostatic adsorption integrated device (dust collector). In the figure, 15 is an exhaust gas inlet, 16 is a baffle, 17 is an electrostatic adsorption dust collection plate, 18 is a dust outlet, and 19 is an exhaust gas outlet.
FIG. 3 is a schematic diagram of a dual field chamber configuration. In the figure, 20 is a first magnetic field chamber, 21 is a second magnetic field chamber, 22 is a first magnetic field plate, 23 is a second magnetic field plate, 24 is a baffle, 25 is a first exhaust outlet of the magnetic field chamber, and 26 is an exhaust outlet of the magnetic field chamber.
FIG. 4 is a cross-sectional view of a mixing tube for exhaust gas, ozone and magnetic photocatalyst being capable of communicating with a magnetic field chamber through an inlet and an outlet of a valve assembly when the valve assembly is rotated to a position.
FIG. 5 is a cross-sectional view of the mixing pipe for exhaust gas, ozone and magnetic photocatalyst being able to communicate with the second magnetic field chamber through the inlet and the second outlet of the valve device when the valve of the valve device is rotated to another position.
Detailed Description
The technical solution of the present invention is further explained by the specific embodiments with the attached drawings:
the magnetic photocatalyst described in the embodiment of the invention can be TiO2A magnetically supported composite photocatalyst which is a photocatalyst, or a magnetic photocatalyst conventional in the art, such as the patent numberThe magnetic photocatalyst of CN200910186295.5, etc., can be used in the present invention as long as it is a magnetic photocatalyst suitable for waste gas treatment in waste plastic processing.
The magnetic field of the magnetic field plate in the embodiment of the invention adopts an electromagnetic field, and after being electrified, the magnetic field is generated, and the magnetic photocatalyst is adsorbed on the magnetic field plate; after the power is cut off, the photocatalyst on the outer layer gradually falls off under the action of gravity until the magnetic photocatalyst completely falls off.
The embodiment of the invention provides waste plastic processing waste gas treatment complete equipment, which comprises a dust removal device 1 and is structurally characterized in that the dust removal device 1 comprises a shell, a waste gas inlet 15 is formed in the top of the shell, a plurality of baffles 16 which are obliquely arranged upwards in parallel are arranged in the inner cavity of the shell, the oblique upwards is that the left side faces downwards and the right side faces upwards, an electrostatic adsorption dust collection plate 17 is arranged below the lowest baffle 16 in the inner cavity of the shell, a dust outlet 18 is formed in the bottom of the shell opposite to the electrostatic adsorption dust collection plate 17, so that dust adsorbed by the electrostatic adsorption dust collection plate 17 is discharged from the dust outlet 18 to realize efficient removal of the dust, and a waste gas outlet 19 is formed in the outer side of the bottom of the shell; during operation, waste gas generated in waste plastic processing is introduced into the dust removal device 1, enters from a waste gas inlet 15 of the dust removal device, collides with the baffle 16 and changes the direction of airflow, large-particle dust and most small-particle dust are separated from the waste gas and enter a dust outlet 18, and fine dust which is not separated from the waste gas is adsorbed on the electrostatic adsorption dust collection plate 17 and is discharged from a waste gas outlet 19. The periphery of the dust removal device 1 is provided with a cooling water circulation system, the cooling water circulation system is a product in the prior art, cooling water enters from a cooling water inlet 2 of the cooling water circulation system, and the cooling water is discharged from a cooling water outlet 3 of the cooling water circulation system for circulation after the peripheral circulation of the dust removal device 1 cools, so that the temperature of waste gas can be effectively reduced. The pretreated waste gas is discharged through a waste gas outlet 19 of the dust removal device 1, enters a waste gas, ozone and magnetic photocatalyst shared mixing pipeline 4 together with ozone and magnetic photocatalyst, is mixed and then enters a photocatalytic chamber 5, the waste gas is degraded under the long-time action (from an inlet to an outlet of the photocatalytic chamber) of an ultraviolet light source 6, the ozone and the magnetic photocatalyst which are arranged in the photocatalytic chamber 5, the ozone is generated by an ozone generator 14, and then enters the waste gas, the ozone and the magnetic photocatalyst shared mixing pipeline through an outlet of the ozone generator and an outlet of a storage bin; the initial magnetic photocatalyst is added into a bin 12 through a feed inlet 13, and ozone generated by an ozone generator 14 is taken out from an outlet of the bin and enters a mixing pipeline 4 shared by the waste gas, the ozone and the magnetic photocatalyst together. The treated waste gas and the magnetic photocatalyst enter a valve device 7 through a gas path outlet of a photocatalytic chamber and are connected to a double magnetic field chamber 8, the valve device 7 is provided with two outlets, namely a first outlet 8 and a second outlet 9, only one outlet is communicated with the first outlet, the valve device 7 is conventional technology in the field and can be realized by general technicians, the double magnetic field chamber comprises a first magnetic field chamber 20 and a second magnetic field chamber 21, a baffle 24 is arranged between the first magnetic field chamber 20 and the second magnetic field chamber 21 for separation, a first magnetic field plate 22 is arranged in the first magnetic field chamber 20, and a first gas outlet 25 of the first magnetic field chamber 20 is arranged on the top surface of the first magnetic field chamber 20; a second magnetic field plate 23 is arranged in the second magnetic field chamber 21, a second gas outlet 26 of the second magnetic field chamber is arranged on the top surface of the second magnetic field chamber 21, and the bottoms of the first magnetic field chamber 20 and the second magnetic field chamber 21 are connected to the stock bin 12; when the outlet I8 of the valve device is communicated with the waste gas, ozone and magnetic photocatalyst shared mixing pipeline 4 and the magnetic field chamber I20, the magnetic field chamber I20 operates, the gas and the magnetic photocatalyst enter the magnetic field chamber I20, the magnetic photocatalyst is adsorbed on the magnetic field plate I22, the gas is discharged from the gas outlet I25 of the magnetic field chamber I, and then passes through the reduction filling layer 11 arranged at the gas outlet I25 of the magnetic field chamber I to reduce redundant ozone, wherein the reduction filling layer 11 is a technology which can be realized by general technicians, such as activated carbon can be used as adsorption filling for reduction, or transition metal oxide is loaded in the reduction filling layer to reduce a small amount of redundant odor and finally discharged into the atmosphere; when the valve device 7 rotates to another position, the first outlet 8 of the valve device is closed, the first magnetic field chamber 20 stops working, and the magnetic photocatalyst falls off from the first magnetic field plate 20 and enters the bin 12. Ozone generated by an ozone generator 14 enters a bin 12 through an outlet of the ozone generator, then the ozone comes out of the bin and carries a magnetic photocatalyst together with waste gas pretreated by a waste gas outlet of a dust removal device, the waste gas is converged into a waste gas, ozone and magnetic photocatalyst shared mixing pipeline 4 and then enters a photocatalytic chamber 5, the waste gas is degraded under the action of an ultraviolet light source 6, the ozone and the magnetic photocatalyst for a long time (from an inlet to an outlet of the photocatalytic chamber), the treated waste gas and the magnetic photocatalyst enter a valve device 7 through a gas path outlet of the photocatalytic chamber, an outlet two 9 of the valve device is communicated with the waste gas, ozone and magnetic photocatalyst shared mixing pipeline 4 and a magnetic field chamber two 21, the magnetic field chamber two 21 operates, the gas and the magnetic photocatalyst enter the magnetic field chamber two 21, the magnetic photocatalyst is adsorbed on a magnetic field plate two 23, and the gas is discharged from a gas outlet 26 of the magnetic field chamber two, then reducing the redundant ozone through the reducing filling layer 11, and finally discharging into the atmosphere.
The bin 12 is provided with a feed inlet 13, an ozone inlet and a bin outlet, ozone generated by an ozone generator 14 enters the bin 12 from the ozone inlet, a magnetic photocatalyst is added into the bin from the feed inlet 13, and the ozone and the magnetic photocatalyst can enter the photocatalytic chamber 5 from the bin outlet of the bin 12 together.
As shown in fig. 4 and 5, the simple valve device of the present invention is provided with an inlet and two outlets, when the valve 27 rotates to one position, the mixing pipeline 4 for the exhaust gas, the ozone and the magnetic photocatalyst can be communicated with the first magnetic field chamber 20 through the inlet of the valve device and then through the first outlet 8, and when the valve rotates to the other position, the mixing pipeline 4 for the exhaust gas, the ozone and the magnetic photocatalyst can be communicated with the second magnetic field chamber 21 through the inlet of the valve device and then through the second outlet 9, the valve can be switched according to the gas flow rate, and the two outlets have only one pipeline to communicate, which is a technology that can be realized by a common technician.
The embodiment of the invention also provides a process for treating waste gas generated in waste plastic processing, which comprises the following steps: 1) waste gas dust removal in waste plastic processing: the magnetic photocatalyst is used for avoiding the pollution of waste gas in waste plastic processing to subsequent processes; 2) degrading polluted waste gas by using a magnetic photocatalyst: the waste plastic processing gas after dust removal enters a photocatalysis chamber for reaction and is degraded into nontoxic and harmless gas; 3) separating purified gas from the magnetic catalyst: the gas circuit is controlled by a valve device, the gas circuit and the magnetic field of the magnetic field chamber work cooperatively, purified gas and the magnetic photocatalyst are introduced into the magnetic field chamber, the separation of the purified gas and the magnetic photocatalyst is realized, and the magnetic photocatalyst is recycled; 4) reduction of excess ozone: the purified gas is discharged from the magnetic field chamber and passes through the reduction filling layer to realize the reduction of the redundant ozone.
The waste plastic processing waste gas dust removal in the upper step 1) is to perform waste gas dust removal through a reverse inertial dust collector and an electrostatic adsorption integrated device, and the reverse inertial dust collector and the electrostatic adsorption integrated device can be used for improving the dust removal effect obviously under the synergistic effect.
The dust removal device is provided with the cooling water circulation system, and the temperature of the waste gas can be effectively reduced through cooling of the cooling water circulation system.
The waste gas is mixed with the magnetic photocatalyst in the photocatalytic chamber, so that the degradation time of the waste gas is prolonged.
Ozone assists photocatalysis, and catalytic efficiency is improved.
The reduction filling layer is loaded with transition metal oxide to reduce a small amount of redundant odor.
The magnetic field of the magnetic field plate in the magnetic field chamber adopts an electromagnetic field, and generates a magnetic field after being electrified, and the magnetic photocatalyst is adsorbed on the magnetic field plate; after the power is cut off, the photocatalyst on the outer layer gradually falls off under the action of gravity until the magnetic photocatalyst completely falls off, and the magnetic photocatalyst enters a storage bin to be recycled.
Claims (10)
1. A waste plastic processing waste gas treatment complete sets, include dust collector, cooling water circulation system, photocatalysis room, valve gear, double magnetic field room, reduction packing layer, feed bin and ozone generator sequentially, characterized by that the said dust collector includes the body, the top of the body has waste gas inlets, the cavity of the body has a plurality of baffles arranged in parallel obliquely upwards, the said oblique upwards is left side down, right side up, locate below the lowest baffle in the cavity of the body have electrostatic adsorption gather dust the collecting plate, there are dust outlets in the bottom of the body opposite to electrostatic adsorption gather dust collecting plate, there are waste gas outlets in the bottom outside of the body; the waste gas enters a dust removal device, a cooling water inlet and a cooling water outlet of a cooling water circulating system are connected around the dust removal device, and the temperature of the waste gas can be effectively reduced through cooling of the cooling water circulating system; the waste gas comes out of the dust removal device, enters a mixing pipeline shared by the waste gas, the ozone and the magnetic photocatalyst together with the ozone and the magnetic photocatalyst to be mixed, and then enters a photocatalysis chamber, the ozone is generated by an ozone generator and then enters the mixing pipeline shared by the waste gas, the ozone and the magnetic photocatalyst through an outlet of the ozone generator and an outlet of a storage bin, the initial magnetic photocatalyst is added into the storage bin through a feed inlet, is taken out from the outlet of the storage bin by the ozone and enters the mixing pipeline shared by the waste gas, the ozone and the magnetic photocatalyst together; the photocatalysis room is connected with the valve device, and the gas after purification gets into the valve device, and the valve device connects two magnetic field rooms, and two magnetic field rooms are equipped with two mutual noninterference's magnetic field room, and every magnetic field room is equipped with two exports, and gas gets into the reduction filling layer from the top, discharges at last, and the feed bin that drops is followed to magnetism photocatalyst bottom.
2. The waste plastic processing waste gas treatment plant as claimed in claim 1, wherein said double magnetic field chambers comprise a first magnetic field chamber and a second magnetic field chamber, the first magnetic field chamber and the second magnetic field chamber are separated by a baffle, a first magnetic field plate is provided in the first magnetic field chamber, and a gas outlet of the first magnetic field chamber is provided on a top surface of the first magnetic field chamber; a second magnetic field plate is arranged in the second magnetic field chamber, a second gas outlet of the second magnetic field chamber is arranged on the top surface of the second magnetic field chamber, and the bottoms of the first magnetic field chamber and the second magnetic field chamber are connected to the storage bin; when an outlet I of the valve device is communicated with a mixing pipeline shared by the waste gas, the ozone and the magnetic photocatalyst and a magnetic field chamber I, the magnetic field chamber I operates, the gas and the magnetic photocatalyst enter the magnetic field chamber I, the magnetic photocatalyst is adsorbed on a magnetic field plate I, the gas is discharged from a gas outlet of the magnetic field chamber I, passes through a reduction filling layer arranged at a gas outlet of the magnetic field chamber I, is used for reducing redundant ozone, and is finally discharged into the atmosphere; when the valve device is turned to the second outlet, the first outlet of the valve device is closed, the first magnetic field chamber stops working, the magnetic photocatalyst falls off from the first magnetic field plate and enters the bin, the second outlet of the valve device is communicated with the second magnetic field chamber through a mixing pipeline shared by the waste gas, the ozone and the magnetic photocatalyst, the second magnetic field chamber operates, purified gas and the magnetic photocatalyst enter the second magnetic field chamber, the magnetic photocatalyst is adsorbed on the second magnetic field plate, the gas is discharged from the gas outlet of the second magnetic field chamber, redundant ozone is reduced through the reduction filling layer, and finally the gas is discharged into the atmosphere.
3. The waste plastic processing exhaust gas treatment plant as claimed in claim 1 or 2, wherein the silo is provided with a feed inlet, an ozone inlet, and a silo outlet, ozone generated by the ozone generator enters the silo through the ozone inlet, the magnetic photocatalyst is added into the silo through the feed inlet, and the ozone and the magnetic photocatalyst can enter the photocatalytic chamber together through the silo outlet of the silo.
4. A process for waste plastic processing waste gas treatment plant as recited in any one of claims 1 to 3, for waste plastic processing waste gas treatment, comprising the steps of: 1) waste gas dust removal in waste plastic processing: the magnetic photocatalyst is used for avoiding the pollution of waste gas in waste plastic processing to subsequent processes; 2) degrading polluted waste gas by using a magnetic photocatalyst: the waste plastic processing gas after dust removal enters a photocatalysis chamber for reaction and is degraded into nontoxic and harmless gas; 3) separating purified gas from the magnetic catalyst: the gas circuit is controlled by a valve device, the gas circuit and the magnetic field of the magnetic field chamber work cooperatively, purified gas and the magnetic photocatalyst are introduced into the magnetic field chamber, the separation of the purified gas and the magnetic photocatalyst is realized, and the magnetic photocatalyst is recycled; 4) reduction of excess ozone: the purified gas is discharged from the magnetic field chamber and passes through the reduction filling layer to realize the reduction of the redundant ozone.
5. The process according to claim 4, wherein the dedusting of the waste plastic processing exhaust gas is carried out by a reverse inertial dust collector and an electrostatic adsorption integrated device, and the reverse inertial dust collector and the electrostatic adsorption integrated device can be used for improving the dedusting effect obviously in a synergistic manner.
6. The process according to claim 5, wherein the dust removing device is provided with a cooling water circulation system, and the temperature of the exhaust gas can be effectively reduced by cooling through the cooling water circulation system.
7. The process of claim 4 wherein the exhaust gas is mixed with a magnetic photocatalyst to prolong the time of degradation of the exhaust gas.
8. The process of claim 4, wherein ozone assists in photocatalysis to increase catalytic efficiency.
9. The process of claim 4, wherein the reducing filler layer is loaded with a transition metal oxide to reduce a small amount of excess ozone.
10. The process as claimed in claim 4, wherein the magnetic field of the magnetic field plate in the magnetic field chamber is an electromagnetic field, and when the electromagnetic field is energized, a magnetic field is generated, and the magnetic photocatalyst is adsorbed on the magnetic field plate; after the power is cut off, the photocatalyst on the outer layer gradually falls off under the action of gravity until the magnetic photocatalyst completely falls off, and the magnetic photocatalyst enters a storage bin to be recycled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810682622.5A CN109260943B (en) | 2018-06-27 | 2018-06-27 | Waste plastic processing waste gas treatment process and complete equipment |
Applications Claiming Priority (1)
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| WO2016008454A1 (en) * | 2014-07-17 | 2016-01-21 | 山东大展纳米材料有限公司 | Apparatus and method for continuous preparation of carbon nanotubes |
| CN108798799A (en) * | 2017-05-02 | 2018-11-13 | 中国石油化工股份有限公司 | Flue gas turbine expander method of scale inhibition based on the online magnetic separation technique of catalyst |
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| WO2005081990A2 (en) * | 2004-02-26 | 2005-09-09 | Metal Alloy Reclaimers, Inc. Ii | Discarded fcc equilibrium catalyst through reclamation |
| US8871096B2 (en) * | 2007-09-10 | 2014-10-28 | Res Usa, Llc | Magnetic separation combined with dynamic settling for fischer-tropsch processes |
| US8791044B2 (en) * | 2010-04-30 | 2014-07-29 | The United States Of America As Represented By The Administrator Of The U.S. Environmental Protection Agency | Doped titanium dioxide as a visible and sun light photo catalyst |
| CN201912926U (en) * | 2010-12-12 | 2011-08-03 | 东北助剂化工有限公司 | Separator of magnetic catalyst in hydrogenation catalytic reaction |
| US9982581B1 (en) * | 2012-04-22 | 2018-05-29 | Halit Gokturk | Reduction of pollutants from a combustion engine |
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| CN108798799A (en) * | 2017-05-02 | 2018-11-13 | 中国石油化工股份有限公司 | Flue gas turbine expander method of scale inhibition based on the online magnetic separation technique of catalyst |
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