CN214827368U - Waste plastic feeding device for pressure reactor - Google Patents
Waste plastic feeding device for pressure reactor Download PDFInfo
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- CN214827368U CN214827368U CN202121094343.0U CN202121094343U CN214827368U CN 214827368 U CN214827368 U CN 214827368U CN 202121094343 U CN202121094343 U CN 202121094343U CN 214827368 U CN214827368 U CN 214827368U
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Abstract
The utility model discloses a waste plastic feeding device for a belt pressure reactor, which comprises a feeding bin; the impurity removing assembly comprises a plastic bin body, and an oil inlet pipe, a feeding port, a lateral line discharging port and a bottom discharging port which are arranged on the plastic bin body, wherein the feeding port is communicated with the discharging port of the feeding bin, and the lateral line discharging port is communicated with the first spiral conveyor; the discharge end of the first spiral conveyor is communicated to the feed inlet of the intermediate storage tank; the discharge port of the intermediate storage tank is communicated to the second screw conveyer, and at least one valve is independently arranged on the corresponding pipeline of the inlet pipe and the outlet pipe; and the second screw conveyer is of a closed structure, a feed inlet of the second screw conveyer is communicated to the intermediate storage tank, and a discharge outlet of the second screw conveyer is communicated to the downstream pressurized reactor. The utility model discloses a feed arrangement can realize the area of waste plastics and press the feeding, prevents when the air admission reactor that high temperature oil gas in the reactor from anti-cluster to the feed arrangement in leaking, can handle mixed waste plastics raw materials on a large scale, and maneuverability is strong, and the operating cost is low.
Description
Technical Field
The utility model relates to a technical field that waste plastics were handled, concretely relates to waste plastics feed arrangement that belt pressure reactor was used.
Background
In the existing urban solid waste, the proportion of plastics reaches 15% -20%, and the treatment of the plastic waste is not only a problem in the plastic industry, but also is a wide concern in the public and international society. In the aspect of urban plastic solid waste treatment, three methods of landfill, incineration and recycling are mainly adopted at present. Among them, the chemical reduction method has been widely noticed as a method for recycling waste plastics, in which waste plastics are cracked in a reactor to cut long chains of polymers and restore their original properties, and the cracked materials can be used to produce new plastics.
Generally, the operating conditions of the waste plastic cracking reactor are that the temperature is 300-500 ℃, and the pressure is 0.1-0.5 MPa; the waste plastic feeding bin is operated at normal pressure and room temperature, the conventional waste plastic feeding device cannot realize the pressurized feeding of waste plastics, and high-temperature oil gas in the pressurized reactor is easy to reversely flow into the feeding device and leak out, so that the pressure of the reactor is low, and further adverse consequences are brought to production operation.
Disclosure of Invention
In view of the deficiencies of the prior art, the utility model provides a waste plastics feed arrangement that pressurized reactor used to solve current waste plastics feed arrangement and appear that reaction oil gas leaks and pressurized reactor pressure production technical problem such as low side.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a waste plastic feed device for a belt pressure reactor, the feed device comprising:
a discharge port of the feeding bin is communicated to the impurity removal assembly;
the impurity removing assembly comprises a plastic bin body, and an oil inlet pipe, a feeding port, a lateral line discharging port and a bottom discharging port which are arranged on the plastic bin body, wherein the feeding port is communicated with the discharging port of the feeding bin, the lateral line discharging port is communicated to a first spiral conveyor, and the bottom discharging port is used for discharging residues;
the feeding end of the first spiral conveyor is communicated to a side line discharging port of the plastic bin body, and the discharging end of the first spiral conveyor is communicated to a feeding port of the intermediate storage tank;
the bottom of the intermediate storage tank is provided with an air inlet pipe, the top of the intermediate storage tank is provided with an exhaust pipe, a discharge port of the intermediate storage tank is communicated to the second screw conveyor, and meanwhile, at least one valve is independently arranged on corresponding pipelines of a material inlet, the discharge port, the air inlet pipe and the exhaust pipe of the intermediate storage tank; and
the second screw conveyer is of a closed structure, a feed inlet of the second screw conveyer is communicated to the intermediate storage tank, and a discharge outlet of the second screw conveyer is communicated to the downstream pressurized reactor.
Preferably, a shredder is further arranged between the feeding bin and the impurity removing assembly.
Preferably, the rotating means in the first and second screw conveyors are independently selected from one of screw shafts, equidistant rotating screw shafts, variable pitch rotating screw shafts and piston shafts.
Preferably, the first screw conveyor is arranged obliquely along the plastic flowing direction, the inclination angle of the first screw conveyor is 5-60 degrees, and the feeding end of the first screw conveyor is arranged close to the bottom of the first screw conveyor.
Preferably, the first screw conveyer is provided with an oil drain port, the oil drain port is arranged below the feed end of the first screw conveyer, the oil drain port is connected to the intermediate oil tank through a pipeline, and the oil outlet of the intermediate oil tank is connected to an oil inlet pipe of the plastic bin through a transfer pump.
Preferably, an intermediate feeding machine is further arranged between the first spiral conveyor and the intermediate storage tank.
Preferably, the side wall of the plastic bin body is also provided with a steam inlet pipe.
Preferably, a discharge port at the bottom of the plastic bin body is communicated to a flushing tank, the flushing tank is provided with a steam inlet pipe and a steam outlet pipe, the steam outlet pipe is communicated into the plastic bin body, and the flushing tank is communicated to a slag groove.
Preferably, the top of the plastic silo body is also provided with a high-point discharge pipe, and the high-point discharge pipe is provided with at least one check valve close to the body.
Preferably, a cooler is further arranged on the high-point discharge pipe, and the cooler is arranged at the rear end of the one-way valve.
Preferably, the feeding device is further provided with a belt feeder arranged at the front end of the feeding bin for conveying the waste plastics to the feeding bin.
Preferably, the belt feeding machine is also provided with an iron removal device in a matching manner.
The utility model has the advantages that:
the utility model discloses waste plastics feed arrangement who presses reactor to use has the exhaust effect that steps up through intermediate storage tank to air smuggleing secretly in the clean-up waste plastics combines second screw conveyer's airtight structure setting, makes waste plastics can press the area to carry to the reactor in, realizes the area of waste plastics and presses the feeding, prevents when the air admission reactor that high temperature oil gas in the reactor from anti-cluster to the feed arrangement in leaking.
The utility model discloses waste plastics feed arrangement that area pressure reactor was used effectively guarantees the maintenance of pressure reactor internal reaction pressure in the area, can handle mixed waste plastics raw materials on a large scale, and maneuverability is strong, invests in for a short time, and operating cost is low.
Drawings
Fig. 1 is a schematic structural view of a waste plastic feeding device for the pressurized reactor of the present invention.
FIG. 2 is a schematic structural view of another embodiment of the waste plastic feeding apparatus for the pressurized reactor of the present invention.
FIG. 3 is a schematic structural view of another embodiment of the waste plastic feeding apparatus for the pressurized reactor of the present invention.
The device comprises a belt feeder 1, a feeding bin 2, a shredder 3, an impurity removing assembly 4, a first screw conveyor 5, an intermediate feeder 6, an intermediate storage tank 7, a second screw conveyor 8, an intermediate oil tank 9, a transfer pump 10, an iron removing device 11, a flushing tank 12, a slag tank 13, a plastic bin body 41, an oil inlet pipe 41a, a material inlet 41b, a side line discharge port 41c, a bottom discharge port 41d, a high-point discharge pipe 41e, a steam inlet pipe 41f, an oil discharge port 51a, a feeding valve 71a, an air inlet valve 71b, an exhaust valve 71c, a discharge valve 71d, a one-way valve 411 and a cooler 412.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
Examples
As shown in fig. 1, the waste plastic feeding device for the pressurized reactor of the present embodiment includes a feeding bin 2, an impurity removing assembly 4, a first screw conveyor 5, an intermediate storage tank 7, and a second screw conveyor 8, which are sequentially communicated along a waste plastic flowing direction, wherein the intermediate storage tank 7 has a pressure boosting and exhausting function to exhaust air entrained in waste plastic, and the second screw conveyor 8 is of a closed structure, so that the waste plastic is conveyed under pressure into a downstream pressurized reactor.
The feeding of the feeding bin 2 is carried out through a belt feeding machine 1, the belt feeding machine 1 is further provided with an iron removal device 11 in a matched mode, the iron removal device 11 can be a conventional device in the field, preferably a suspended self-unloading permanent magnet iron remover, the belt feeding machine 1 is arranged at the front end of the feeding bin 2 and used for conveying waste plastics to the feeding bin 2, a feeding hole of the feeding bin 2 can be open, and a discharging hole of the feeding bin can be communicated to the impurity removing assembly 4; preferably, a shredder 3 is further arranged between the feeding bin 2 and the impurity removing assembly 4 for shredding waste plastics, so that the subsequent operation is more facilitated.
The impurity removing assembly 4 of the embodiment comprises a plastic bin body 41, and an oil inlet pipe 41a, a material inlet 41b, a lateral line discharge port 41c and a bottom discharge port 41d which are arranged on the plastic bin body, wherein the material inlet 41b is communicated with a discharge port of the feeding bin 2, the lateral line discharge port 41c is communicated with the first screw conveyor 5, the bottom discharge port 41d is used for discharging residues, a stirring device is further arranged in the plastic bin body 41 and used for stirring waste plastics in the plastic bin body, and a steam inlet pipe 41f is further arranged on the side wall of the plastic bin body 41 and used for maintaining a certain operation temperature of the waste plastics; the impurity removal assembly 4 integrally forms a closed liquid circulation system, namely, an oil product introduced into the oil inlet pipe 41a is used for leaching waste plastics in the plastic bin body 41, the waste plastics float on the liquid level after being leached, the waste plastics carrying the oil product after being further leached enter the first spiral conveyor 5, the oil product extruded by the first spiral conveyor 5 is circularly returned to the plastic bin body 41 for circular leaching, waste plastic fragments are repeatedly leached through circulating liquid, and inorganic impurities such as iron, glass, stones, soil and the like carried in the waste plastics are removed; after leaching, the inorganic impurities naturally settle at the bottom of the plastic silo body 41. The bottom discharge port 41d of the plastic bin body 41 is communicated to the flushing tank 12, the flushing tank 12 is provided with a steam inlet pipe 41f and a steam outlet pipe, the steam outlet pipe is communicated into the plastic bin body 41, the flushing tank 12 is communicated to the slag groove 13, waste plastics carried in the flushing tank 12 are flushed through saturated steam and then recycled into the plastic bin body 41, and the remaining inorganic impurity residues are periodically collected and discharged to the slag groove 13 after being flushed.
Waste plastics subjected to impurity removal by the impurity removal assembly 4 are extruded and conveyed by a first screw conveyor 5, the feed end of the first screw conveyor 5 is communicated to a lateral line discharge port 41c of the plastic silo body 41, and the discharge end of the first screw conveyor is communicated to a feed port of the intermediate storage tank 7; an air inlet pipe is arranged at the bottom of the intermediate storage tank 7, an exhaust pipe is arranged at the top of the intermediate storage tank, a discharge hole of the intermediate storage tank 7 is communicated to the second screw conveyor 8, at least one valve is independently arranged on a corresponding pipeline of a feeding hole, a discharge hole, the air inlet pipe and the exhaust pipe of the intermediate storage tank 7, the valves are a feeding valve 71a, a discharge valve 71d, an air inlet valve 71b and an exhaust valve 71c respectively, the discharge valve 71d is preferably a sealed rotary valve to control the discharge amount of waste plastics, and the valves are switched to work to realize the feeding of the waste plastics, the exhaust of entrained waste plastics air and the discharge of the waste plastics; the second screw conveyer 8 is of a closed structure, a feed inlet of the second screw conveyer is communicated to the intermediate storage tank 7, and a discharge outlet of the second screw conveyer is communicated to the downstream pressurized reactor; the rotating devices in the first screw conveyor 5 and the second screw conveyor 8 are independently selected from one of screw shafts, equidistant rotating screw shafts, variable-pitch rotating screw shafts and piston shafts to further ensure the effect of the sealing structure thereof. Preferably, the first screw conveyor 5 is arranged obliquely along the plastic flowing direction, the inclination angle of the first screw conveyor 5 is 5-60 degrees, and the feeding end of the first screw conveyor 5 is arranged close to the bottom of the first screw conveyor 5. The first screw conveyer 5 is provided with an oil drain port 51a, the oil drain port 51a is arranged below the feeding end of the first screw conveyer 5, the oil drain port 51a is connected to the intermediate oil tank 9 through a pipeline, the oil outlet of the intermediate oil tank 9 is connected to the oil inlet pipe 41a of the plastic bin through the transfer pump 10, and therefore oil extruded by the first screw conveyer 5 is circularly returned to the plastic bin body 41 through the intermediate oil tank 9 and the transfer pump 10 for circular leaching.
The working mode of feeding waste plastics in this embodiment is: during the feeding of the intermediate tank 7, the feeding valve 71a, the intake valve 71b and the exhaust valve 71c are opened, and low-temperature and low-pressure steam or nitrogen is continuously introduced into the bottom of the intermediate tank, and during the falling of the waste plastic chips from the top of the intermediate tank, the steam or nitrogen carries the air in the waste plastic chips to the top of the intermediate tank and discharges the waste plastic chips out of the intermediate tank; after the intermediate tank 7 is filled with waste plastics, the feeding is stopped, the feed valve 71a is closed, and low-pressure saturated steam or other inert gas (e.g., nitrogen gas) is continuously introduced to the bottom portion for the purpose of purging air entrained in the waste plastics; after the air is removed, the pressure is increased through the switching of corresponding valves by the intermediate storage tank 7, and the pressure is stopped when the pressure is increased to 0.5-1.0MPa higher than the reaction pressure in the pressurized reactor; at this time, the second screw conveyor 8 and valves arranged on the front and rear pipelines thereof are opened, and the plastic in the intermediate storage tank 7 is pushed into the pressurized reactor. Waste plastics feeding in intermediate storage tank 7 and the second screw conveyer 8 is gone on with sealed mode, through the operation of stepping up of intermediate storage tank 7 and the setting of the 8 enclosed construction of second screw conveyer for waste plastics can take the area to press and carry to the reactor in, realize the area of waste plastics and take the pressure feeding, prevent that the air from getting into the reactor and prevent that the high temperature oil gas in the reactor from anti-cluster from leaking in the feed arrangement, thereby effectively guarantee the maintenance of taking the interior reaction pressure of pressure reactor.
The top of the plastic silo body 41 is further provided with a high-point discharge pipe 41e, and the high-point discharge pipe 41e is provided with at least one check valve 411 near the body.
In at least one embodiment, as shown in fig. 2, the feeding structure of the waste plastic feeding device for the pressurized reactor is the same as that shown in fig. 1, such as the impurity removing assembly 4, the first screw conveyor 5, the intermediate storage tank 7, the second screw conveyor 8, etc., an intermediate feeding machine 6 is further disposed between the first screw conveyor 5 and the intermediate storage tank 7, and the intermediate feeding machine 6 is used for raising the feeding elevation of waste plastic, thereby facilitating the flexible arrangement of the assemblies disclosed in this embodiment.
In at least one embodiment, the feeding structure of the waste plastic feeding device for the pressurized reactor disclosed in fig. 3 is the same as that shown in fig. 2, such as the impurity removing assembly 4, the first screw conveyor 5, the intermediate feeding machine 6, the intermediate storage tank 7, the second screw conveyor 8, etc., and the high-point discharge pipe 41e of the impurity removing assembly 4 of this embodiment is further provided with a cooler 412, the cooler 412 is arranged at the rear end of the check valve 411, and the cooled condensate returns to the plastic silo body 41.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention.
Claims (10)
1. A waste plastic feed device for a belt pressure reactor, characterized in that the feed device comprises:
a discharge port of the feeding bin is communicated to the impurity removal assembly;
the impurity removing assembly comprises a plastic bin body, and an oil inlet pipe, a feeding port, a lateral line discharging port and a bottom discharging port which are arranged on the plastic bin body, wherein the feeding port is communicated with the discharging port of the feeding bin, the lateral line discharging port is communicated to a first spiral conveyor, and the bottom discharging port is used for discharging residues;
the feeding end of the first spiral conveyor is communicated to a side line discharging port of the plastic bin body, and the discharging end of the first spiral conveyor is communicated to a feeding port of the intermediate storage tank;
the bottom of the intermediate storage tank is provided with an air inlet pipe, the top of the intermediate storage tank is provided with an exhaust pipe, a discharge port of the intermediate storage tank is communicated to the second screw conveyor, and meanwhile, at least one valve is independently arranged on corresponding pipelines of a material inlet, the discharge port, the air inlet pipe and the exhaust pipe of the intermediate storage tank; and
the second screw conveyer is of a closed structure, a feed inlet of the second screw conveyer is communicated to the intermediate storage tank, and a discharge outlet of the second screw conveyer is communicated to the downstream pressurized reactor.
2. Waste plastic feeding device for a pressurized reactor as claimed in claim 1, wherein a shredder is further provided between the feeding hopper and the discarding means.
3. Waste plastic feeding device for a pressurized reactor as defined in claim 1, wherein the first screw conveyor is disposed obliquely in the plastic flow direction, the angle of inclination of the first screw conveyor is 5 to 60 degrees, and the feeding end of the first screw conveyor is disposed near the bottom of the first screw conveyor.
4. Waste plastic feeding device for a pressurized reactor according to claim 1, wherein the first screw conveyor is provided with an oil drain port disposed near below the feed end of the first screw conveyor, the oil drain port is connected to an intermediate tank through a pipeline, and the oil outlet of the intermediate tank is connected to the oil inlet pipe of the plastic silo through a transfer pump.
5. Waste plastic feeding device for a pressurized reactor as defined in claim 1, wherein an intermediate feeder is further provided between the first screw conveyor and the intermediate tank.
6. The waste plastic feeding device for the pressurized reactor as claimed in claim 1, wherein the side wall of the plastic silo body is further provided with a steam inlet pipe.
7. The waste plastic feeding device for the pressurized reactor as set forth in claim 1, wherein the bottom discharge port of the plastic silo body is communicated to a flushing tank, the flushing tank is provided with a steam inlet pipe and a steam outlet pipe, the steam outlet pipe is communicated to the inside of the plastic silo body, and the flushing tank is communicated to the slag groove.
8. Waste plastic feeding device for pressurized reactor according to claim 1, characterized in that the top of the plastic silo body is further provided with a high point discharge pipe, and the high point discharge pipe is provided with at least one check valve near the body.
9. Waste plastic feeding device for pressurized reactor as claimed in claim 8, characterized in that a cooler is further provided on the high point discharge pipe, the cooler being provided at the rear end of the check valve.
10. Waste plastic feeding device for a pressurized reactor as defined in claim 1, wherein the feeding device is further provided with a belt feeder provided at the front end of the feeding hopper for conveying waste plastic to the feeding hopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121094343.0U CN214827368U (en) | 2021-05-20 | 2021-05-20 | Waste plastic feeding device for pressure reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121094343.0U CN214827368U (en) | 2021-05-20 | 2021-05-20 | Waste plastic feeding device for pressure reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214827368U true CN214827368U (en) | 2021-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121094343.0U Active CN214827368U (en) | 2021-05-20 | 2021-05-20 | Waste plastic feeding device for pressure reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214827368U (en) |
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2021
- 2021-05-20 CN CN202121094343.0U patent/CN214827368U/en active Active
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