CN216604574U - Plastics granulation tail gas cleanup unit - Google Patents
Plastics granulation tail gas cleanup unit Download PDFInfo
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- CN216604574U CN216604574U CN202123255526.9U CN202123255526U CN216604574U CN 216604574 U CN216604574 U CN 216604574U CN 202123255526 U CN202123255526 U CN 202123255526U CN 216604574 U CN216604574 U CN 216604574U
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- filter screen
- tail gas
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Abstract
The utility model provides a plastic granulation tail gas purification device, which comprises an oil removal device and a cyclone tower, wherein an airflow channel is arranged in the oil removal device, a condensation chamber, an air guide pipe, a draught fan and an exhaust pipe are sequentially arranged in the airflow channel along the gas flowing direction, and one end of an air outlet pipeline is communicated to an airflow inlet of the cyclone tower; the air guide pipe is arranged at the rear end of the condensation chamber, a filter screen is arranged at a communication port of the air guide pipe and the condensation chamber, and an oil return groove is formed in the bottom of the filter screen; the draught fan comprises an impeller, and an oil suction net is arranged on the outer circumference of the impeller. A filter screen in the air guide pipe performs coarse filtration on oil drops, an impeller of the induced draft fan rotates, and an oil absorption net absorbs centrifuged oil drops; at the moment, the waste gas is discharged to the cyclone tower through the exhaust pipe, the oil mist content in the waste gas is extremely low, and the waste gas cannot be adhered to subsequent purification equipment.
Description
Technical Field
The utility model relates to the field of waste gas treatment, in particular to a plastic granulation tail gas purification device.
Background
A large amount of VOC gas is generated in the plastic granulation process, most of organic matters have pungent smell, great damage is caused to human bodies and the environment, and the organic matters can be discharged only by carrying out multi-treatment and purification. The common treatment method in the prior art is to introduce VOC gas into a cyclone tower, generate centrifugal motion through a cyclone plate, generate comprehensive actions such as collision, condensation and the like with atomized liquid drops, flow to the bottom of the tower along the tower wall of the cyclone tower to remove most of smoke, water mist and particulate matters, perform adsorption and purification through an activated carbon adsorption device, and finally discharge the purified gas through a chimney.
The active carbon has excellent adsorption performance, but can produce the oil smoke in the partial granulation technology, only can not wash completely by the atomizing liquid drop of whirl tower, still has a large amount of oil mist to discharge, and this part oil mist can the adhesion on the active carbon, influences the adsorption effect of active carbon, makes the active carbon adsorption inefficacy, needs to change the active carbon completely, reduces the change cycle of active carbon, has increased active carbon adsorption device's input cost. The improvement method that can adopt is that increase the filtration layer number of whirl tower, but the deoiling effect is not good.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a plastic granulation tail gas purification device, which can reduce the content of oil drops in granulation tail gas and reduce the damage of oil drop adhesion to purification equipment.
In order to achieve the purpose of the utility model, the plastic granulation tail gas purification device comprises an oil removal device and a cyclone tower, wherein an air inlet pipeline and an air outlet pipeline are arranged outside the oil removal device, an air flow channel is communicated between the air inlet pipeline and the air outlet pipeline, a condensation chamber, an air guide pipe, a draught fan and an exhaust pipe are sequentially arranged in the air flow channel along the gas flowing direction, one end of the air outlet pipeline is communicated with the exhaust pipe, and the other end of the air outlet pipeline is communicated with an air flow inlet of the cyclone tower;
a condensing pipe is arranged on the outer side of the condensing chamber, the air guide pipe is arranged at the rear end of the condensing chamber, a filter screen is arranged at a communication port of the air guide pipe and the condensing chamber, and an oil return groove is formed in the bottom of the filter screen;
the induced draft fan is arranged on the rear side of the air guide pipe and comprises an impeller, and an oil suction net is arranged on the outer circumference of the impeller.
Most of oil drops are removed through an oil removing device before waste gas is sprayed, a filter screen in an air guide pipe is used for roughly filtering the waste gas, an impeller of an induced draft fan rotates to enable gas to generate a centrifugal effect, and an oil absorption screen absorbs the separated oil drops; at the moment, the waste gas is discharged to the cyclone tower through the exhaust pipe, large-particle dust in the waste gas is removed, the oil mist content in the waste gas is extremely low, and the waste gas cannot be adhered to subsequent purification equipment.
Further, the filter screen is arranged to be inclined downwards along the gas flowing direction.
Furthermore, a filler net is arranged in the exhaust pipe.
Further, the exhaust pipe vertically set up in the upper end of draught fan.
Further, still be provided with the access door on deoiling device's the lateral wall, the access door is located the lower extreme of exhaust pipe.
Further, still include UV photodissociation clarifier and active carbon adsorption case, the one end of UV photodissociation clarifier links to each other with the gas outlet of whirl tower, the other end of UV photodissociation clarifier links to each other with the gas inlet of active carbon adsorption case.
Furthermore, the end part of the air inlet pipeline is provided with a gas collecting hood.
Compared with the prior art, the plastic granulation tail gas purification device has the following advantages:
1. the waste gas is primarily filtered by the filter screen in the oil removing device, oil drops are gathered in the oil return tank, and are secondarily adsorbed by the oil absorption net due to the centrifugal effect, and finally, the residual oil drops are absorbed by the filler net in the exhaust pipe. The discharged gas after passing through the oil removing device has extremely low oil mist content, and the oil mist does not interfere the subsequent purification setting.
2. The waste gas is sequentially subjected to oil removal by an oil removal device, dust and mist removal by a spray tower and odor decomposition by a UV photolysis purifier, and finally the residual harmful components in the gas are absorbed by an activated carbon adsorption box and discharged by a chimney, so that the waste gas discharge requirement can be met; the active carbon adsorption box at the tail end only needs to treat a small amount of harmful components and does not need to be replaced frequently.
Drawings
FIG. 1 is a schematic structural diagram of a plastic granulation tail gas purification device of the present invention;
fig. 2 is a schematic structural diagram of the oil removing device in fig. 1.
Reference numerals: 1. an oil removal device; 2. an air inlet pipeline; 3. an air outlet pipeline; 4. a condensing chamber; 5. an air guide pipe; 6. an induced draft fan; 7. an exhaust duct; 8. a condenser tube; 9. filtering with a screen; 10. an oil return groove; 11. an impeller; 12. an oil suction net; 13. a filler web; 14. an access door; 15. a gas-collecting hood; 16. a cyclone tower; a UV photolysis purifier; 18. an activated carbon adsorption tank.
Detailed Description
The utility model is further described below with reference to the following figures and specific examples.
As shown in fig. 1-2, a plastic granulation tail gas purification device comprises an oil removal device 1 and a cyclone tower 16, wherein an air inlet pipeline 2 and an air outlet pipeline 3 are arranged outside the oil removal device 1, an air flow channel is communicated between the air inlet pipeline 2 and the air outlet pipeline 3, a condensation chamber 4, an air guide pipe 5, an induced draft fan 6 and an exhaust pipe 7 are sequentially arranged in the air flow channel along the air flow direction, one end of the air outlet pipeline 3 is communicated with the exhaust pipe 7, and the other end of the air outlet pipeline 3 is communicated with an air flow inlet of the cyclone tower 16;
the outside that exhaust pipe 7 and air-out pipeline 3 are linked together condensation chamber 4 is provided with condenser 8, and guide duct 5 sets up in the rear end of condensation chamber 4, and the intercommunication mouth of guide duct 5 and condensation chamber 4 is provided with filter screen 9, and the bottom of filter screen 9 is provided with oil gallery 10. The filter screen 9 is made of stainless steel, larger oil drops are blocked by the filter screen 9 and then are recovered in an oil return groove 10 at the bottom of the oil removing device 1 along a stainless steel wire, and an oil outlet is formed in the bottom of the oil removing device, so that the oil drops subjected to coarse filtration can be treated; the filter screen 9 is arranged in a downward inclination mode along the air flow direction, so that oil on the filter screen 9 can be directly dripped into the oil return groove 10 conveniently.
The induced draft fan 6 is arranged at the rear side of the air guide pipe 5, the induced draft fan 6 comprises an impeller 11, and an oil suction net 12 is arranged on the outer circumference of the impeller 11. When the impeller 11 rotates, liquid drops in the exhaust gas are thrown out by the impeller 11 and are adsorbed by the oil absorption net 12, and the content of oil drops in the gas is further reduced.
The end part of the air inlet pipeline 2 is provided with a gas-collecting hood 15, granulation waste gas is collected by the gas-collecting hood 15 at the outlet of the granulator and enters the oil removal device 1 along with air flow from the air inlet pipeline 2; waste gas gets into guide duct 5 after the cooling in condensation chamber 4, and the filter screen 9 of wind-guiding mouth tip carries out primary filtration to oil dripping, and large granule oil dripping and dust in the waste gas are blockked by filter screen 9 and flow into the backward flow groove of filter screen 9 bottom. Waste gas passes through draught fan 6 behind the guide duct 5, and the impeller 11 of draught fan 6 rotates and produces centrifugal force, and the liquid drop is driven by impeller 11 and is set up in the oil absorption net 12 of 11 circumference of impeller and adsorb, and gas passes impeller 11, leads to air-out pipeline 3 by the air-out side of draught fan 6.
Furthermore, a filler net 13 is arranged in the exhaust pipe 7 to remove residual liquid drops after the exhaust gas is separated and adsorbed by the impeller 11. The exhaust pipe 7 is vertically arranged at the upper end of the draught fan 6, and liquid drops can fall freely in the exhaust pipe 7 under the action of gravity of the liquid drops, so that the amount of the liquid drops brought out by air flow is reduced. Further, still be provided with access door 14 on the lateral wall in the deoiling device 1, access door 14 is located the lower extreme of exhaust pipe 7, opens access door 14, is convenient for make the change to draught fan 6 and filler net 13, strengthens filler net 13's deoiling effect.
As shown in fig. 1, in this embodiment, a UV photolysis purifier 17 and an activated carbon adsorption tank 18 are further provided, one end of the UV photolysis purifier 17 is connected to the air outlet of the cyclone tower 16, the other end of the UV photolysis purifier 17 is connected to the air inlet of the activated carbon adsorption tank 18, and the granulation exhaust gas is sequentially processed by the oil removal device 1, the cyclone tower 16, the UV photolysis purifier 17 and the activated carbon adsorption tank 18.
In the embodiment, the oil removing device 1 is arranged at the front end of the cyclone tower 16, waste gas generated by plastic granulation is collected by the gas collecting hood 15, and the waste gas is firstly subjected to oil mist filtration by the oil removing device 1 to block large-particle oil drops and independently collect a large number of oil drops; after oil removal, the exhaust gas passes through the cyclone tower 16, and the atomized liquid drops wash the smoke, water mist and particulate matters; and then the gas is deodorized by the UV photolysis purifier 17, VOC in the waste gas is eliminated, and finally the residual harmful impurities are adsorbed by the active carbon. Above-mentioned multichannel purification process has outstanding filter effect to granulation waste gas, can reach the exhaust emission requirement. The oil removing device 1 is used for carrying out centralized separation and treatment on a large amount of oil drops, so that the phenomenon that the oil drops are not completely cleaned by the cyclone tower 16 is avoided, and the oil drops enter a subsequent treatment process and are accumulated to cause the failure of the filtering and purifying functions of the device.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the utility model is not limited to the embodiments disclosed, but is capable of various modifications and substitutions without departing from the spirit of the utility model.
Claims (7)
1. The utility model provides a plastics granulation tail gas cleanup unit which characterized in that: the device comprises an oil removing device and a cyclone tower, wherein an air inlet pipeline and an air outlet pipeline are arranged on the outer side of the oil removing device, an airflow channel is communicated between the air inlet pipeline and the air outlet pipeline, a condensing chamber, an air guide pipe, an induced draft fan and an exhaust pipe are sequentially arranged in the airflow channel along the gas flowing direction, one end of the air outlet pipeline is communicated with the exhaust pipe, and the other end of the air outlet pipeline is communicated with an airflow inlet of the cyclone tower;
a condensing pipe is arranged on the outer side of the condensing chamber, the air guide pipe is arranged at the rear end of the condensing chamber, a filter screen is arranged at a communication port of the air guide pipe and the condensing chamber, and an oil return groove is formed in the bottom of the filter screen;
the induced draft fan is arranged on the rear side of the air guide pipe and comprises an impeller, and an oil suction net is arranged on the outer circumference of the impeller.
2. The plastic granulation tail gas purification device as claimed in claim 1, wherein: the filter screen is arranged along the downward inclination of the gas flowing direction.
3. The plastic granulation tail gas purification device as claimed in claim 1, wherein: and a filler net is arranged in the exhaust pipe.
4. The plastic granulation tail gas purification device as defined in claim 3, wherein: the exhaust pipe vertically set up in the upper end of draught fan.
5. The plastic granulation tail gas purification device as defined in claim 4, wherein: still be provided with the access door on deoiling device's the lateral wall, the access door is located the lower extreme of exhaust pipe.
6. A plastic granulation exhaust gas purification device as defined in any one of claims 1 to 5, wherein: still include UV photodissociation clarifier and active carbon adsorption case, the one end of UV photodissociation clarifier links to each other with the gas outlet of whirl tower, the other end of UV photodissociation clarifier links to each other with the gas inlet of active carbon adsorption case.
7. The plastic granulation tail gas purification device as defined in claim 6, wherein: and a gas collecting hood is arranged at the end part of the air inlet pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123255526.9U CN216604574U (en) | 2021-12-22 | 2021-12-22 | Plastics granulation tail gas cleanup unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123255526.9U CN216604574U (en) | 2021-12-22 | 2021-12-22 | Plastics granulation tail gas cleanup unit |
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| Publication Number | Publication Date |
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| CN216604574U true CN216604574U (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123255526.9U Active CN216604574U (en) | 2021-12-22 | 2021-12-22 | Plastics granulation tail gas cleanup unit |
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| CN (1) | CN216604574U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115972535A (en) * | 2023-02-02 | 2023-04-18 | 马鞍山华盛环保科技有限公司 | Smoke treatment device of plastic granulator |
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2021
- 2021-12-22 CN CN202123255526.9U patent/CN216604574U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115972535A (en) * | 2023-02-02 | 2023-04-18 | 马鞍山华盛环保科技有限公司 | Smoke treatment device of plastic granulator |
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