Garbage soil drum screening device

Abstract

A garbage soil roller screening device comprises a screening roller, a first belt conveyor, a second belt conveyor, a third belt conveyor, a resistance heating belt and an annular gas circuit. The screening roller comprises an inner cylinder and an outer cylinder which are concentrically arranged, an input port and an output port are formed in the two ends of the inner cylinder, and the input port is higher than the output port; a plurality of screening holes are distributed in the surface of the inner cylinder; one end of the outer cylinder is provided with an outer cylinder outlet, and the lower side wall of the outer cylinder is provided with a discharge funnel; the first belt conveyor is connected with the input port; the second belt conveyor is connected with the output port; the third belt conveyor is connected with a discharge funnel; the resistance heating belt is mounted on the outer wall of the outer cylinder; the annular gas circuit is mounted on the inner wall of the outer cylinder; a plurality of airflow nozzles are installed on the annular air path, and an air path connector connected with an external air source is arranged on the annular air path. According to the utility model, the humidity of garbage soil can be reduced, the blockage of the screening holes is reduced, the condition that garbage fragments are mixed into soil is reduced, and the screening efficiency and the screening quality are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of garbage soil processing equipment, and particularly relates to a garbage soil drum screening device. Background Art

[0002] A garbage soil drum screening machine is a common garbage soil screening device. In practice, garbage soil mixed with domestic waste is poured into the drum screening machine from an input port. The drum rotates, and the screening holes on the drum separate the domestic waste and soil. This existing solution presents several problems: First, some garbage soil, due to long-term landfilling, has a high moisture content, resulting in the domestic waste and wet soil in the waste mixture becoming intertwined and difficult to screen. Second, some large pieces of domestic waste can easily clog the screening holes during the screening process, reducing screening efficiency. Third, some domestic waste, such as plastic film, weathers over time into small, lightweight plastic fragments. These plastic fragments pass through the screening holes and mix into the soil, reducing screening quality. Therefore, developing a new structure for garbage soil drum screening devices to overcome these existing problems is a topic for further research by those skilled in the art. Utility Model Content

[0003] The purpose of the utility model is to provide a garbage-soil drum screening device, which can reduce the humidity of the garbage mixture, reduce the clogging of the screening holes, and reduce the mixing of plastic fragments into the soil, thereby improving the screening efficiency and screening quality.

[0004] The utility model discloses a garbage soil drum screening device, which comprises:

[0005] The screening drum comprises an inner drum and an outer drum arranged in the form of concentric straight circular tubes, an input port being provided at one end of the inner drum and an output port being provided at the other end of the inner drum, and the input port being arranged higher than the output port; a plurality of screening holes are distributed on the surface of the inner drum, connecting the inner and outer sides of the inner drum; an outer drum outlet is provided at one end of the outer drum, and a discharge funnel is provided on the lower side wall of the outer drum;

[0006] a first belt conveyor, one end of which is conductively connected to the input port;

[0007] a second belt conveyor, one end of the second belt conveyor being conductively connected to the output port;

[0008] a third belt conveyor, one end of which is conductively connected to the discharge hopper;

[0009] A resistance heating belt, the resistance heating belt being fixedly mounted on the outer wall of the outer cylinder;

[0010] An annular gas path is fixedly mounted on the inner wall of the outer tube; the annular gas path is provided with a plurality of air flow nozzles with nozzles facing the outlet of the outer tube, and the annular gas path is provided with an air path interface for connecting to an external air source.

[0011] This technical solution involves placing a mixture of oily garbage, soil, and domestic waste to be screened onto a first belt conveyor. The first belt conveyor is then activated to introduce the mixture from the input port into the inner drum, which is then activated to rotate radially. As the inner drum rotates, the mixture is screened through the screening holes in the inner drum into smaller particles of soil, which fall through the holes into the outer drum, and larger particles of domestic waste, which remain in the inner drum. During this process, the resistance heating belt is activated to heat the outer drum. As the outer drum heats up, its walls generate heat radiation, which raises the temperature inside the screening drum. This heat accelerates the evaporation of moisture in the mixture, thereby alleviating the problem of domestic waste and wet soil intertwining, making screening difficult. Simultaneously, an external air source is activated to inject air into the annular air circuit, which is then ejected through the air nozzles in separate paths. Because plastic fragments are lighter than soil, the airflow from the nozzles causes at least some / all of the plastic fragments to float through the discharge hopper and exit the outer drum through the outlet. This reduces the amount of plastic fragments mixed into the garbage soil and improves screening quality.

[0012] Preferably, the extension direction of the resistance heating belt is parallel to the extension direction of the cylinder of the screening drum. Further preferably, the number of the resistance heating belts can be configured as four, and the four resistance heating belts are evenly distributed on the radial outside of the outer cylinder.

[0013] By adopting this technical solution, the heating of the outer cylinder by the screening drum is made more uniform, and the radiant heat generated by the outer cylinder to the inside of the screening drum is made more uniform, thereby improving the heating and dehumidification effect of the mixed garbage.

[0014] Preferably, the plurality of air flow nozzles are configured to be connected to the lower half of the annular air path.

[0015] By adopting this technical solution, plastic fragments and garbage soil are moved to the inner cylinder through the screening holes, which effectively reduces the complexity of the equipment and reduces processing costs.

[0016] Preferably, the plurality of air flow nozzles include a first air flow nozzle whose jet direction forms an angle of 0° with the axial direction of the screening drum, a second air flow nozzle whose jet direction forms an angle of 15° with the axial direction of the screening drum, and a third air flow nozzle whose jet direction forms an angle of 30° with the axial direction of the screening drum. The second air flow nozzle is configured to be located below the third air flow nozzle, and the first air flow nozzle is configured to be located below the second air flow nozzle.

[0017] By adopting the above technical solution: the first air flow nozzle outputs an air flow that is in contact with the lowermost side of the inner wall of the screening drum, and is used to blow the garbage soil and plastic fragments that fall through the screening holes in contact with the inner wall of the screening drum, and use the mass difference between the two to blow the plastic fragments away from the garbage soil; the third air flow nozzle outputs an air flow directed to the screening holes to reduce the situation where the screening holes are blocked by domestic garbage during the screening process, thereby improving the screening efficiency; the air flow output by the second air flow nozzle is used as an intermediate transition and supplement to the air flow output by the first air flow nozzle and the third air flow nozzle, forming a confluence of three air flows in different directions to avoid turbulence in the screening drum.

[0018] Preferably, the cylinder diameter of the inner cylinder is 0.8-1.2m, the cylinder length of the inner cylinder is 3.0-6.0m, and the sieve holes are evenly distributed on the cylinder surface of the inner cylinder; the cylinder diameter of the outer cylinder is 1.5-2.0m, the cylinder length of the outer cylinder is consistent with the cylinder length of the inner cylinder, and the discharge funnel is arranged on the outer cylinder near the output end of the inner cylinder.

[0019] Compared with the prior art, the present invention has achieved the following technical advancements:

[0020] First, the utility model can increase the overall temperature inside the screening drum by heating, thereby reducing the humidity of the garbage soil and reducing the situation where domestic garbage and moist soil are wrapped around each other and difficult to screen.

[0021] Secondly, the utility model can ensure that the radiant heat generated by the outer cylinder to the inside of the screening drum is more uniform, thereby improving the heating and dehumidification effect on the mixed garbage.

[0022] Thirdly, the utility model reduces the plastic fragments mixed in the garbage soil by using the air flow output by the air flow nozzle, thereby improving the screening quality.

[0023] Fourthly, the utility model utilizes the airflow directed toward the screening holes output by the airflow nozzle to reduce the situation where the screening holes are blocked by domestic garbage during the screening process, thereby improving the screening efficiency.

[0024] Finally, the equipment of the present invention has a simple structure and is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of Example 1.

[0026] Figure 2 Schematic diagram of the internal structure of the screening drum.

[0027] Figure 3 for Figure 2 A partial enlarged schematic diagram of area A in the middle.

[0028] Figure 4 for Figure 2 A partial enlarged schematic diagram of area B in the middle.

[0029] In the figure, the corresponding reference numerals of the various components are as follows:

[0030] 100, screening drum; 200, first belt conveyor; 300, second belt conveyor; 400, third belt conveyor; 600, annular air circuit; 610, first air flow nozzle; 620, second air flow nozzle; 630, third air flow nozzle; 640, air circuit interface; 700, external air source; 110, inner cylinder; 120, outer cylinder; 130, discharge funnel; 140, resistance heating belt; 111, screening hole. DETAILED DESCRIPTION

[0031] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0032] Example 1, please refer to Figure 1-4 :

[0033] A garbage soil drum screening device comprises: a screening drum 100, a first belt conveyor 200, a second belt conveyor 300, a third belt conveyor 400, a resistance heating belt 140, and an annular air path 600.

[0034] The screening drum 100 includes an inner drum 110 and an outer drum 120 arranged in concentric straight circular tubes. An input port is provided at one end of the inner drum 110, and an output port is provided at the other end of the inner drum 110. The screening drum 100 is further configured so that the input port is higher than the output port (i.e., one end of the input port is tilted and located at a higher position, while one end of the output port is located at a lower position). The surface of the inner drum 110 is provided with a plurality of screening holes 111 that connect the inner and outer sides of the inner drum 110; an outer drum outlet is provided at one end of the outer drum 120, and a discharge funnel 130 is provided on the lower side wall of the outer drum 120 near one end of the outer drum outlet.

[0035] The output end of the first belt conveyor 200 is conductively connected to the input port;

[0036] The input end of the second belt conveyor 300 is conductively connected to the output port;

[0037] The input end of the third belt conveyor 400 is located below the discharge hopper 130 and is electrically connected to the discharge hopper 130;

[0038] The resistance heating belt 140 is fixedly mounted on the outer wall of the outer cylinder 120 and is used to generate a heating effect on the outer wall of the outer cylinder 120 when the power is on. Specifically, in this example, the belt extension direction of the resistance heating belt 140 is parallel to the extension direction of the cylinder of the screening drum 100. Furthermore, the number of the resistance heating belts 140 is configured to be four, and the four resistance heating belts 140 are evenly distributed on the radial outside of the outer cylinder 120, respectively located at 0°, 90°, 180°, and 270° relative to the radial center axis of the outer cylinder 120.

[0039] The annular gas circuit is fixedly mounted on the inner wall of the outer cylinder 120. Several airflow nozzles are mounted on the annular gas circuit, with their nozzles facing the outlet of the outer cylinder. A gas circuit interface 640 for connecting to an external gas source 700 is also provided on the annular gas circuit. In this example, the several airflow nozzles are configured to be connected to the lower half of the annular gas circuit. Furthermore, the several airflow nozzles include a first airflow nozzle 610 whose jet direction forms a 0° angle with the axial direction of the screening drum 100, a second airflow nozzle 620 whose jet direction forms a 15° angle with the axial direction of the screening drum 100, and a third airflow nozzle 630 whose jet direction forms a 30° angle with the axial direction of the screening drum 100. The second airflow nozzle 620 is located below the third airflow nozzle 630, and the first airflow nozzle 610 is located below the second airflow nozzle 620.

[0040] In this example, the cylinder diameter of the inner cylinder 110 is 0.8-1.2m, the cylinder length of the inner cylinder 110 is 3.0-6.0m, and the sieve holes 111 are evenly distributed on the cylinder surface of the inner cylinder 110; the cylinder diameter of the outer cylinder 120 is 1.5-2.0m, and the cylinder length of the outer cylinder 120 is consistent with the cylinder length of the inner cylinder 110.

[0041] It should be noted that in this example, the structures and connections of the screening drum 100, the first belt conveyor 200, the second belt conveyor 300, and the third belt conveyor 400 are all mature technologies in the field. Therefore, this solution and the accompanying drawings omit the description of the drive devices and their operating principles for the inner drum 110, the first belt conveyor 200, the second belt conveyor 300, and the third belt conveyor 400. This solution further omits the description of the power supply equipment for the resistance heating belt 140.

[0042] In practice, the process works as follows:

[0043] The waste mixture of oily garbage, soil, and domestic waste to be screened is placed on the first belt conveyor 200. The first belt conveyor 200 is activated, directing the waste mixture from the input port into the inner drum 110. The inner drum 110 is then activated to rotate radially. As the inner drum 110 rotates, the waste mixture is screened through the screening holes 111 therein, separating the smaller waste soil particles into the outer drum 120, and the larger domestic waste particles into the inner drum 110. During this process, the resistance heating belt 140 is powered on and heated to the outer drum 120. As the outer drum 120 heats up, its walls generate heat radiation, raising the temperature inside the screening drum 100. This heat accelerates the evaporation of moisture in the waste soil mixture, thereby alleviating the problem of domestic waste and wet waste soil intertwining, making screening difficult. Simultaneously, the external air source 700 is activated, injecting air into the annular air path, which is then ejected from the air nozzles in separate paths. Because plastic fragments are lighter than the garbage soil, the airflow from the first airflow nozzle 610 causes at least some / all of the plastic fragments to float through the discharge hopper 130 and out of the outer drum 120 through the outer drum outlet. This reduces the amount of plastic fragments mixed with the garbage soil, improving screening quality. Simultaneously, the airflow from the third airflow nozzle 630 blows from the outside of the inner drum 110 toward the inside, reducing the risk of garbage clogging the screening holes 111 and improving screening efficiency.

[0044] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they will still fall within the scope of protection of the present invention.

Claims

1. A garbage soil drum screening device, characterized in that: include: The screening drum comprises an inner drum and an outer drum arranged in the form of concentric straight circular tubes, an input port being provided at one end of the inner drum and an output port being provided at the other end of the inner drum, and the input port being arranged higher than the output port; a plurality of screening holes are distributed on the surface of the inner drum, connecting the inner and outer sides of the inner drum; an outer drum outlet is provided at one end of the outer drum, and a discharge funnel is provided on the lower side wall of the outer drum; a first belt conveyor, one end of which is conductively connected to the input port; a second belt conveyor, one end of the second belt conveyor being conductively connected to the output port; a third belt conveyor, one end of which is conductively connected to the discharge hopper; A resistance heating belt, the resistance heating belt being fixedly mounted on the outer wall of the outer cylinder; An annular gas path is fixedly mounted on the inner wall of the outer tube; the annular gas path is provided with a plurality of air flow nozzles with nozzles facing the outlet of the outer tube, and the annular gas path is provided with an air path interface for connecting to an external air source.

2. The garbage soil drum screening device according to claim 1, characterized in that: The extending direction of the resistance heating belt is parallel to the extending direction of the cylinder of the screening drum.

3. The garbage soil drum screening device according to claim 2, characterized in that: The plurality of air flow nozzles are configured to be connected to the lower half of the annular air path.

4. The garbage soil drum screening device according to claim 3, characterized in that: The several air flow nozzles include a first air flow nozzle whose jet direction forms an axial angle of 0° with the sieve drum, a second air flow nozzle whose jet direction forms an axial angle of 15° with the sieve drum, and a third air flow nozzle whose jet direction forms an axial angle of 30° with the sieve drum; the second air flow nozzle is configured to be located below the third air flow nozzle, and the first air flow nozzle is configured to be located below the second air flow nozzle.

5. The garbage soil drum screening device according to claim 4, characterized in that: The inner cylinder has a diameter of 0.8-1.2 m, a length of 3.0-6.0 m, and the sieve holes are evenly distributed on the surface of the inner cylinder; the outer cylinder has a diameter of 1.5-2.0 m, a length of the outer cylinder is consistent with that of the inner cylinder, and the discharge funnel is arranged on the outer cylinder near the output end of the inner cylinder.

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