CN214719223U - Waste gas treatment device for plastic modification granulation - Google Patents
Waste gas treatment device for plastic modification granulation Download PDFInfo
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- CN214719223U CN214719223U CN202120661383.2U CN202120661383U CN214719223U CN 214719223 U CN214719223 U CN 214719223U CN 202120661383 U CN202120661383 U CN 202120661383U CN 214719223 U CN214719223 U CN 214719223U
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Abstract
The utility model discloses a waste gas treatment device for plastic modification granulation, which utilizes a liquid ring vacuum pump to suck waste gas at different outlets in a plastic modification granulation production line, the collected waste gas firstly enters a cooling dust remover, and then enters the liquid ring vacuum pump after cooling and dust removal; the liquid ring vacuum pump uses high-boiling oil as a liquid sealing agent, waste gas which is pumped out can be washed while vacuum is obtained, an oil-gas mixture discharged by the liquid ring vacuum pump enters the oil collecting tank again for gas-liquid separation, oil mist beads are removed from a gas phase through a wire mesh demister and then are further treated to reach the standard and discharged, a liquid phase is cooled through a tube nest at the lower part of the oil collecting tank, and the cooled high-boiling oil is recycled to the liquid ring vacuum pump to continue to be used as the liquid sealing agent. The utility model discloses a waste gas treatment device can effectively promote the collection rate of waste gas, simultaneously with the amount of wind decline of waste gas 80% at least, waste gas concentration improves more than 4 times.
Description
Technical Field
The utility model relates to an environmental protection technology field especially relates to a waste gas treatment device of plastics modification granulation.
Background
The raw materials for plastic modification production generally comprise polypropylene, polycarbonate/nylon, fillers (talcum powder, calcium carbonate and glass fiber) and the like, and the raw materials are mixed uniformly in a stirrer after being proportioned according to a certain proportion and then are fed to a main feeding port of a granulator, and auxiliary materials such as glass fiber and the like enter at a secondary feeding port. The raw and auxiliary materials are melted in the granulator, the plasticizing heating section is of a closed structure, a heating device is arranged outside a material barrel of the granulator, the temperature of the materials in the material barrel is raised through heat conduction during preheating to reach the melting and melting temperature (180-280 ℃) of the materials, the melted resin is pushed forward through a screw, and the melted raw materials are extruded out of a die head part and enter a conveyor belt cooling water tank. In the granulation process, high-temperature melting waste gas is generated and needs to be collected and processed subsequently, and according to the monitoring data of the similar enterprises, the concentration of the converged waste gas is 137mg/m3。
In the prior art, the waste gas of the traditional granulator is usually pumped by a water washing machine or a big fan, and the waste gas of the traditional granulator is insoluble in water, so that the peculiar smell is difficult to eliminate; the latter actually uses large air volume to dilute the waste gas, and the actual treatment effect is not good because the concentration of the waste gas is very low.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model aims at providing a waste gas treatment device of plastics modification granulation when can effectively promote the waste gas collection rate, reduces the amount of wind of waste gas and improves its concentration.
In order to achieve the above object, the utility model discloses a technical scheme be: the waste gas treatment device for plastic modification granulation is characterized by comprising a waste gas collecting device, a cooling dust removing device, a negative pressure device and a gas-liquid separating device which are sequentially communicated;
the waste gas collecting device collects waste gas in a plastic modification granulation production line, the waste gas enters the cooling and dedusting device for cooling and dedusting under the suction action of the negative pressure device, and then enters the gas-liquid separation device for gas-liquid separation.
Further, a gas phase outlet of the gas-liquid separation device is communicated with the demisting device.
Further, the defogging device comprises a wire mesh demister.
Furthermore, the negative pressure device comprises a liquid ring vacuum pump, and the liquid ring vacuum pump adopts high-boiling oil as a liquid sealing agent.
Further, a liquid phase outlet of the gas-liquid separation device is communicated with the liquid ring vacuum pump.
Furthermore, the cooling and dust removing device adopts a coil pipe type water cooling structure, waste gas flows through a shell pass, and cooling water flows through a pipe pass and circularly flows in and out.
Furthermore, the waste gas treatment device is further provided with a key for starting.
Furthermore, the gas-liquid separation device comprises a baffle and a cooling device which are arranged in the gas-liquid separation device, the inside of the gas-liquid separation device is divided into a first space and a second space through the baffle, the first space is communicated with the gas inlet, the second space is communicated with the defogging device, and the first space is communicated with the second space through the gas inlet.
Furthermore, the cooling device is arranged at the lower part of the gas-liquid separation device, the cooling device adopts a tube array type water cooling structure, and cooling water circularly enters and exits through a tube pass.
The utility model has the advantages that:
1) the liquid ring vacuum pump is used for pumping the waste gas, so that the collection rate of the waste gas is improved, the air volume of the waste gas is reduced by at least 80%, and the concentration of the waste gas is improved by more than 4 times;
2) the cooling and dust removing device adopts a coil pipe type water cooling structure, waste gas passes through a shell pass, partial oil stain is separated out in the cooling process, and the waste gas repeatedly impacts the shell barrel wall and the coil pipe, so that the oil stain and dust are reduced, and the consumption of high-boiling oil for subsequent washing is reduced;
3) high-boiling oil is used as a liquid sealing agent of the liquid ring vacuum pump, the high-boiling oil can absorb black smoke in a pump cavity, and peculiar smell can be removed;
4) the gas-liquid two phases sprayed out by the vacuum pump rich in oil mist are subjected to gas-liquid separation in the gas-liquid separation device, and the middle baffle plate can prevent the vacuum sprayed gas from being short-circuited; the wire mesh demister can remove oil droplets of <1 micron; the tubular cooler at the bottom can cool the oil which does work for a long time, so that the evaporation of the oil is reduced;
5) the equipment cost and the operation cost are low, the operation is simple, the structure is compact, and the occupied area is small;
6) the high-boiling oil used by the liquid ring vacuum pump is a class C substance, and the safety is guaranteed due to the explosion-proof motor and the anti-static design.
Drawings
FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;
fig. 2 is a schematic structural diagram of an oil collecting tank in the embodiment of the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Referring to fig. 1-2, an apparatus for treating waste gas in plastic modification granulation according to an embodiment of the present invention specifically includes: the device comprises a waste gas collecting device 13, a cooling dust remover 1, a liquid ring vacuum pump 2, an oil collecting tank 3 and a wire mesh demister 4; the waste gas collecting device 13 collects the waste gas of a single plastic modification granulation production line, and the total air volume is about 400m3The cooling dust remover comprises a granulator, a shell, a cooling water inlet, a cooling water outlet, a shell barrel wall, an extrusion head, a shell barrel wall, a coil pipe, a shell barrel wall, a coil pipe, cooling water inlet and outlet, and the like, wherein the granulator is communicated with a feed inlet and an extrusion head respectively, waste gas is collected and then enters the cooling dust remover 1, the cooling dust remover 1 adopts a coil pipe type water cooling structure, the shell is made of carbon steel, the coil pipe is internally provided with DN15, cooling water is circulated and fed in and out through the tube pass, waste gas enters the shell pass, and goes out from the bottom to the top, partial oil stain is separated out from the waste gas in the cooling process, the waste gas repeatedly impacts the shell barrel wall and the coil pipe, the oil stain and dust are reduced, and consumption of high-boiling oil for subsequent washing is reduced.
The waste gas enters the liquid ring vacuum pump 2 after being cooled and dedusted, the liquid ring vacuum pump 2 uses high-boiling oil as a liquid sealing agent, the vacuum is obtained, and the extracted waste gas can be washed, so that black smoke in the waste gas is absorbed in a pump cavity, and peculiar smell is removed.
The oil-gas mixture discharged by the liquid ring vacuum pump 2 is rich in oil mist, enters the oil collecting tank 3 from the gas inlet 5 for gas-liquid separation, and is discharged from the gas outlet 9 after the gas phase is subjected to oil mist removal through the wire mesh demister 4, and is subjected to subsequent further treatment and then is discharged after reaching the standard; the liquid phase is settled to the bottom of the oil collecting tank 3 and is cooled by a tubular cooler 7 arranged at the lower part of the oil collecting tank 3, the cooled high-boiling oil part is circulated back to the liquid ring vacuum pump 2 through a sewage draining outlet 11 to be continuously used as a liquid sealing agent, and the other part is discharged through a liquid outlet 12. A quick-opening manhole 10 is arranged above the oil collecting tank 3, and a flat sight glass is arranged on the manhole 10 to observe the liquid level condition in the oil collecting tank 3 in real time.
The middle of the oil collecting tank 3 is provided with a baffle 6 for preventing short circuit of vacuum jet gas; baffle 6 is first space and second space with 3 internal partitioning of sump oil tank, first space intercommunication air inlet 5, and second space intercommunication silk screen demister 4 sets up gas port 8 above the baffle 6 to the intercommunication gas of first space and second space is crossed. The wire mesh demister 4 can remove oil droplets of <1 micron; the tubular cooler 7 at the bottom of the oil collecting tank 3 can cool the high-boiling oil which does work for a long time, and the evaporation loss of the high-boiling oil is reduced.
The waste gas treatment device of the utility model is used in cooperation with a plastic modified granulation production line, the investment cost of the waste gas treatment device of a single production line is not higher than 10 ten thousand, and the investment intensity of individual workshop enterprises can be satisfied; meanwhile, the operation is simple, and the quality operation of operators in individual workshops can be met; the installed capacity of the waste gas treatment device of a single production line is less than 16KW, only about 400L of oil needs to be added, oil is changed once every 2-3 months, and the operation cost is low; meanwhile, the device has compact integral structure and small occupied area, and is suitable for industrial production popularization and application.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (9)
1. The waste gas treatment device for plastic modification granulation is characterized by comprising a waste gas collecting device, a cooling dust removing device, a negative pressure device and a gas-liquid separating device which are sequentially communicated;
the waste gas collecting device collects waste gas in a plastic modification granulation production line, the waste gas enters the cooling and dedusting device for cooling and dedusting under the suction action of the negative pressure device, and then enters the gas-liquid separation device for gas-liquid separation.
2. The exhaust gas treatment device according to claim 1, wherein the gas phase outlet of the gas-liquid separation device is communicated with a demisting device.
3. The exhaust treatment device of claim 2, wherein the demister device comprises a wire mesh demister.
4. The exhaust gas treatment device according to claim 1, wherein the negative pressure device comprises a liquid ring vacuum pump, and the liquid ring vacuum pump uses high-boiling oil as a liquid sealing agent.
5. The exhaust gas treatment device according to claim 4, wherein a liquid phase outlet of the gas-liquid separation device is communicated with the liquid ring vacuum pump.
6. The exhaust gas treatment device according to claim 1, wherein the cooling and dust removal device adopts a coil pipe type water cooling structure, the exhaust gas flows through a shell pass, and the cooling water flows in and out through a pipe pass in a circulating manner.
7. The exhaust treatment device of claim 1, wherein the exhaust treatment device is further configured to be activated by a key.
8. The exhaust gas treatment device according to claim 2, wherein the gas-liquid separation device comprises a baffle plate and a cooling device arranged in the gas-liquid separation device, the inside of the gas-liquid separation device is partitioned into a first space and a second space by the baffle plate, the first space is communicated with the gas inlet, the second space is communicated with the demister, and the first space is communicated with the second space through the gas inlet.
9. The exhaust gas treatment device according to claim 8, wherein the cooling device is disposed at a lower portion of the gas-liquid separation device, and the cooling device is of a shell-and-tube water cooling structure, and cooling water circulates in and out through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120661383.2U CN214719223U (en) | 2021-03-31 | 2021-03-31 | Waste gas treatment device for plastic modification granulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120661383.2U CN214719223U (en) | 2021-03-31 | 2021-03-31 | Waste gas treatment device for plastic modification granulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214719223U true CN214719223U (en) | 2021-11-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120661383.2U Expired - Fee Related CN214719223U (en) | 2021-03-31 | 2021-03-31 | Waste gas treatment device for plastic modification granulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214719223U (en) |
-
2021
- 2021-03-31 CN CN202120661383.2U patent/CN214719223U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211116 |
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| CF01 | Termination of patent right due to non-payment of annual fee |