Grid slag vacuum conveying and collecting control system

Abstract

The utility model discloses a grid slag vacuum conveying and collecting control system. The grid slag vacuum conveying and collecting control system comprises a console, a coarse grid unit, a medium grid unit, a fine grid unit, a sand-water separation unit, a collecting and discharging unit and a workbench, the coarse grid unit, the medium grid unit, the fine grid unit and the sand-water separation unit are all communicated with the collecting and discharging unit through negative pressure pipelines; the negative pressure pipeline is connected with a negative pressure chamber; the working table adopts a double-table-board type working table; the workbench is arranged in the garbage concentrated transportation room and corresponds to the collecting and discharging unit. A plurality of air pressure sensors are further arranged on the negative pressure pipeline, and data communication is established between the air pressure sensors and the console so as to judge whether blockage occurs in the negative pressure pipeline or not; and the console is used for realizing automatic control of the grid slag vacuum conveying and collecting control system. According to the utility model, the influence of the surrounding environment is reduced, the operation cost, the time required for clearing and transporting the grid slag and the collection frequency of the clearing and transporting vehicle are reduced by unmanned duty, the whole environment of the sewage treatment technology can be on the same level, and the operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to sewage treatment technology, and more specifically, to a control system for vacuum conveying and collecting screenings. Background Art

[0002] At present, the sewage treatment equipment in the whole sewage treatment plant is generally placed on the ground and operates in an open environment. The screenings generated are loaded into a collection and transportation bucket, and are transported manually and concentrated in a garbage room, and finally poured into a garbage collection vehicle barrel by barrel.

[0003] However, there are still many defects in the above operation method:

[0004] 1) The screenings are directly loaded into the collection and transportation bucket without passing through processes such as drying and crushing. The moisture content and volume of the screenings are relatively large, resulting in a limited loading capacity of a single collection and transportation bucket.

[0005] 2) Odors will be emitted from the collection and transportation bucket during the manual transportation process of one bucket at a time by a single person.

[0006] 3) The collection and transportation bucket has a workload of about 30 - 40 buckets per day. After the collection vehicle arrives, it still needs to be poured into the collection vehicle barrel by barrel manually, which is very time-consuming and laborious.

[0007] To sum up, the existing method for screening removal requires manual transportation, has a slow transportation speed, will have an impact on the external environment during the transportation process, the screenings have not been processed such as drying and crushing, have a relatively large volume and are not dense, requiring a high collection frequency for the collection vehicle, and the screening removal process takes a lot of time.

[0008] If the existing method is still used, in the case of an increase in the quantity of screenings with a large water volume, a large number of collection and transportation buckets need to be added. However, the existence of a large number of collection and transportation buckets will also have an adverse impact on the surrounding environment. Summary of the Utility Model

[0009] Aiming at the defects existing in the prior art, the purpose of the utility model is to provide a control system for vacuum conveying and collecting screenings, which reduces the impact on the external environment, unmanned operation reduces the operation cost, the time required for screening removal and the collection frequency of the collection vehicle, enables the overall environment of the sewage treatment technology to reach a higher level, and improves the operation efficiency.

[0010] To achieve the above purpose, the utility model adopts the following technical scheme:

[0011] A control system for vacuum conveying and collecting screenings includes a control console, a coarse screen unit, a medium screen unit, a fine screen unit, a sand and water separation unit, a collection and discharging unit, and a workbench;

[0012] The coarse grille unit, the medium grille unit, the fine grille unit and the sand-water separation unit are all connected to the collection and discharge unit through negative pressure pipelines;

[0013] A negative pressure chamber is connected to the negative pressure pipeline to generate negative pressure in the negative pressure pipeline, and adsorb the grille residues pretreated by the coarse grille unit, the medium grille unit, the fine grille unit and the sand-water separation unit into the collection and discharge unit;

[0014] The workbench adopts a double-table type workbench for placing the collection and transportation buckets;

[0015] The workbench is arranged in the garbage collection and transportation room and corresponds to the collection and discharge unit;

[0016] A plurality of air pressure sensors are also arranged on the negative pressure pipeline, and the air pressure sensors establish data communication with the console to judge whether the negative pressure pipeline is blocked;

[0017] The console is used to realize the automatic control of the grille residue vacuum transportation and collection control system.

[0018] Preferably, the coarse grille unit, the medium grille unit, the fine grille unit and the sand-water separation unit are all arranged in the enclosed space of the underground layer;

[0019] The collection and discharge unit and the workbench are both arranged in the working area of the ground floor.

[0020] Preferably, the coarse grille unit includes a coarse grille, a shaftless screw conveyor, a screw press, a primary conveying screw, a crusher, a secondary conveying screw, a coarse grille buffer hopper and a coarse grille drying system connected in sequence;

[0021] The coarse grille buffer hopper is connected to the collection and discharge unit through the negative pressure pipeline.

[0022] Preferably, the medium grille unit includes a medium grille, a screw conveyor, a press, a primary conveying screw, a crusher, a secondary conveying screw, a medium grille buffer hopper and a medium grille drying system connected in sequence;

[0023] The medium grille buffer hopper is connected to the collection and discharge unit through the negative pressure pipeline.

[0024] Preferably, the fine grille unit includes a fine grille, a press, a primary horizontal conveying screw, a second press dewatering machine, a secondary conveying screw, a fine grille buffer hopper and a fine grille drying system connected in sequence;

[0025] The fine grille buffer hopper is connected to the collection and discharge unit through the negative pressure pipeline.

[0026] Preferably, the sand-water separation unit includes a sand-water separator, a primary horizontal conveying screw, a pressing and dewatering machine, a secondary conveying screw, a sand-water separation buffer hopper, and a sand-water separation and drying system, which are connected in sequence;

[0027] The sand-water separation buffer hopper is connected to the collection and discharging unit through the negative pressure pipeline.

[0028] Preferably, the collection and discharging unit includes a gas-solid separator, a buffer hopper, a feeding rotary valve, and a docking port, which are connected in sequence;

[0029] The gas-solid separator is connected to the coarse grille unit, the medium grille unit, the fine grille unit, and the sand-water separation unit;

[0030] The docking port corresponds to the workbench.

[0031] Preferably, the feeding rotary valve adopts a spiral groove cutting structure.

[0032] Preferably, a hydraulic push rod for compressing the grid residue in the collection bucket is further provided above the workbench.

[0033] Preferably, there are two negative pressure chambers;

[0034] Each negative pressure chamber is provided with a Roots blower.

[0035] Preferably, the control console is equipped with a PLC programmable controller and an HMI human-machine interface.

[0036] The grid residue vacuum conveying and collecting control system and method provided by the present invention have the following beneficial effects:

[0037] (1) The present invention solves the adverse impact on the environment during the transportation of grid residue

[0038] Originally, the grid residue was carried out in an open environment on the ground floor. The transportation needed to be loaded through trash cans and then transported to the ground transportation layer for storage by elevator by manual labor, waiting for transfer. During the manual transportation, the trash cans passed through the pretreatment area, and the airtight performance of the trash cans was not good, causing the areas along the way to be affected by the odor of the grid residue, seriously affecting the surrounding environment.

[0039] The present invention transports the grid residue through a closed pipeline to institutions such as crushing, pressing, and drying, and then uses the pipeline to send it into the hopper of the gas-solid separator. The institutions such as crushing, pressing, and drying are placed in a closed space on the underground layer, realizing a fully closed transportation of the operation and transportation process, and will not have an impact on the pretreatment area and the surrounding environment.

[0040] (2) The present invention solves the problem that manual participation was originally required and reduces the operation cost

[0041] The operation of each device is controlled by a PLC programmable logic controller and monitored and adjusted through an HMI human-machine interface. After setting the present utility model to operate automatically, it can run without human intervention, saving labor costs.

[0042] (3) The present utility model solves the deficiencies of large grid residue blocks, high water content, and weak loading capacity.

[0043] The original grid residue is directly loaded into a trash can through a conveyor and then manually transported to the transfer area. The grid residue blocks are relatively large and have a high water content. The transfer trash cans are directly loaded onto the vehicle for transportation, and the trash can transfer vehicle needs to be loaded once every 1 - 2 days, with a relatively high frequency.

[0044] Through the present utility model, after the grid residue is pressed, crushed, and dried, its moisture content and volume are effectively reduced. Finally, the grid residue is loaded into the garbage bin through a gas-solid separation hopper. There is a hydraulic thrust compression device in the garbage transfer box. After the grid residue enters the transfer box, it will be compressed again. When the compression pressure reaches the set value, the staff will be prompted to contact the vehicle for transfer. Brief Description of the Drawings

[0045] Figure 1 is a schematic diagram of the framework structure of the grid residue vacuum conveying and collecting control system of the present utility model;

[0046] Figure 2 is a schematic diagram of the structure of the coarse grid unit in the grid residue vacuum conveying and collecting control system of the present utility model;

[0047] Figure 3 is a schematic diagram of the structure of the sand-water separation unit, fine grid unit, and medium grid unit in the grid residue vacuum conveying and collecting control system of the present utility model;

[0048] Figure 4 is a schematic diagram of the structure of the collection and discharging unit in the grid residue vacuum conveying and collecting control system of the present utility model;

[0049] Figure 5 is a schematic diagram of the flow of the grid residue vacuum conveying and collecting control method of the present utility model;

[0050] Figure 6 is a schematic diagram of the motor circuit of the Roots blower and the feeding rotary valve in the grid residue vacuum conveying and collecting control system of the present utility model;

[0051] Figure 7 is a schematic diagram of the main circuit of the motor of the feeding rotary valve in the grid residue vacuum conveying and collecting control system of the present utility model;

[0052] Figure 8 is a schematic diagram of the input signal circuit of the coarse grid buffer hopper, medium grid buffer hopper, fine grid buffer hopper, and sand-water separation buffer hopper in the grid residue vacuum conveying and collecting control system of the present utility model;

[0053] Figure 9 It is a schematic diagram of the fault signal input circuit of the Roots blower and the feeding rotary valve in the grid residue vacuum conveying and collecting control system of the present utility model;

[0054] Figure 10 It is a schematic diagram of the switch signal input circuit of various valves on the negative pressure pipeline in the grid residue vacuum conveying and collecting control system of the present utility model. Specific embodiments

[0055] In order to better understand the above technical solutions of the present utility model, the technical solutions of the present utility model will be further described below in conjunction with the drawings and embodiments.

[0056] In order to fundamentally solve the problems existing in the collection and transportation of grid residues and grit in the prior art, such as inconvenient handling and foul smell emission, and to ensure the overall environment of the sewage treatment plant's pretreatment workshop and the health of the staff, through in-depth analysis and research on the sewage treatment plant's pretreatment workshop, the original above-ground sewage pretreatment area was finally transferred to an underground sealed space for treatment. The present utility model adopts the principle of vacuum adsorption and uses pipeline-type closed transportation to convey garbage such as grid residues and grit to each pretreatment unit for treatment and then through pipeline-type closed transportation to the ground layer for transfer. The ground layer part can be transformed into a garden or other landscapes. Based on this, the transformation of the ultra-clean space for sewage treatment plant pretreatment is completed, thereby reducing environmental pollution during the sewage treatment process, effectively improving the factory environment of the sewage treatment plant, and enhancing the air quality of the factory area.

[0057] Combined with Figure 1 As shown, a grid residue vacuum conveying and collecting control system provided by the present utility model includes a console, a coarse grid unit, a medium grid unit, a fine grid unit, a sand-water separation unit, a collection and discharge unit, and a workbench 1.

[0058] The coarse grid unit, the medium grid unit, the fine grid unit, and the sand-water separation unit are all connected to the collection and discharge unit through a negative pressure pipeline 2.

[0059] A negative pressure chamber 3 is connected to the negative pressure pipeline 2 to generate negative pressure in the negative pressure pipeline 2, and adsorb the grid residues and grit pretreated by the coarse grid unit, the medium grid unit, the fine grid unit, and the sand-water separation unit into the collection and discharge unit.

[0060] The workbench 1 adopts a double-table workbench for placing two transport buckets that can be exchanged.

[0061] The workbench 1 is installed in the garbage transport room 4 and corresponds to the collection and discharge unit.

[0062] Several air pressure sensors 5 are also installed on the negative pressure pipeline 2. The air pressure sensors 5 establish data communication with the console to determine whether blockage occurs in the negative pressure pipeline 2 and give alarm prompt information.

[0063] The console is equipped with a PLC programmable controller and an HMI human-machine interface. Through the PLC programmable controller, the automatic control of the grid residue vacuum conveying and collection control system of the present utility model is realized, without manual intervention. Each unit will automatically run each step of the operation according to the preset program of the PLC programmable controller; through the HMI human-machine interface, the grid residue vacuum conveying and collection control system of the present utility model is monitored and adjusted; the input and output control points of the PLC programmable controller can also be used to control and monitor all moving parts and signal feedback.

[0064] The coarse grid unit, medium grid unit, fine grid unit, and sand-water separation unit are all arranged in the enclosed space of the underground layer, and then connected through the negative pressure pipeline 2, and the whole process is carried out in a closed manner to ensure that the odor does not leak out.

[0065] Combined Figure 1 and Figure 2 As shown in the figure, the coarse grid unit includes a coarse grid 6, a shaftless screw conveyor, a screw press 7, a primary conveying screw, a crusher 8, a secondary conveying screw 9, a coarse grid drying system, and a coarse grid buffer hopper 10 that are connected in sequence.

[0066] Combined Figure 1 and Figure 3 As shown in the figure, the medium grid unit includes a medium grid 11, a screw conveyor, a press 12, a primary conveying screw, a crusher 13, a secondary conveying screw 14, a medium grid drying system, and a medium grid buffer hopper 15 that are connected in sequence.

[0067] The fine grid unit includes a fine grid 16, a press 17, a primary horizontal conveying screw 18, a second-stage press dewatering machine 19, a secondary conveying screw 20, a fine grid drying system, and a fine grid buffer hopper 21 that are connected in sequence.

[0068] The sand-water separation unit includes a sand-water separator 22, a primary horizontal conveying screw 23, a press dewatering machine 24, a secondary conveying screw 25, a sand-water separation drying system, and a sand-water separation buffer hopper 26 that are connected in sequence.

[0069] Combined Figure 1 and Figure 4 As shown in the figure, the collection and discharging unit includes a gas-solid separator 27, a buffer hopper 28, a feeding rotary valve 29, and a docking port 30 that are connected in sequence.

[0070] The coarse grid buffer hopper 10, the medium grid buffer hopper 15, the fine grid buffer hopper 21, and the sand-water separation buffer hopper 26 are all connected to the gas-solid separator 27 through the negative pressure pipeline 2.

[0071] The docking interface 30 corresponds to the workbench 1.

[0072] In the fine grille unit and the sand-water separation unit, the grille residues are initially pressed by a press to remove the moisture in the grille residues, and then heated and dried by a drying system (high-pressure hot air blower). Finally, they are sent into the gas-solid separator 27 on the ground floor through the negative pressure pipeline 2.

[0073] In the coarse grille unit and the medium grille unit, the larger grille residues are crushed by a crusher, then heated and dried by a drying system, and finally sent into the gas-solid separator 27 on the ground floor through the negative pressure pipeline 2.

[0074] The grille residues and sand in the gas-solid separator 27 fall into the buffer hopper 28. The grille residues and sand in the buffer hopper 28 will enter the docking interface 30 through the continuously operating feeding rotary valve 29. The feeding rotary valve 29 adopts a spiral groove cutting structure to further cut and crush the grille residues.

[0075] Above the workbench 1, a hydraulic push rod 31 is also provided for compressing the grille residues in the collection bucket. When the compression pressure reaches the set value, it means that the grille residues in the collection bucket are full and need to be cleared and processed.

[0076] The workbench 1 adopts a double-table workbench for placing two collection buckets for exchange. The empty collection bucket is placed on the vacant workbench 1. The workbench 1 moves left and right through the telescopic docking device 32 to move the empty collection bucket to the working station (below the docking interface 30), and the full collection bucket is removed from the working station and can be loaded and transported away.

[0077] The collection bucket can adopt an integrated stainless steel compression box

[0078] The precise alignment between the docking interface 30 and the working station on the workbench 1 can be achieved through the optoelectronic docking control device 33.

[0079] Combined with Figure 1 As shown, there are two negative pressure chambers 3, one for use and one for standby. Each negative pressure chamber 3 is provided with a Roots blower 34.

[0080] Combined with Figure 5 As shown, the control process of the grille residue vacuum conveying and collecting control system of the present utility model includes the following steps:

[0081] S1, Pretreat the grille residues and sand through the coarse grille unit, medium grille unit, fine grille unit and sand-water separation unit;

[0082] S2, Start the Roots blower 34 in the negative pressure chamber 3 to generate negative pressure in the negative pressure pipeline 2, and adsorb the pretreated grille residues and sand to the collection and discharging unit;

[0083] S3. Collect the screenings and grits processed by the discharging unit and put them into the collection and transportation bucket placed on the workbench 1.

[0084] The above step S1 specifically includes:

[0085] In the coarse screen unit, the screenings from the coarse screen 6 are dewatered by the screw press 7, then conveyed by the first-stage conveying screw to the crusher 8 for crushing and shaping, and then heated and dried by the coarse screen drying system. After that, they are conveyed by the second-stage conveying screw 9 to the coarse screen buffer hopper 10 for buffering.

[0086] In the medium screen unit, the screenings from the medium screen 11 are dewatered by the press 12, then conveyed by the first-stage conveying screw to the crusher 13 for crushing and shaping, and then heated and dried by the medium screen drying system. After that, they are conveyed by the second-stage conveying screw 20 to the medium screen buffer hopper 21 for buffering.

[0087] In the fine screen unit, the screenings from the fine screen 16 are preliminarily dewatered by the press 17, then conveyed by the first-stage horizontal conveying screw 18 to the second-stage press 19 for secondary dewatering. After that, they are conveyed by the second-stage conveying screw 20 to the fine screen drying system for heating and drying treatment and then sent to the fine screen buffer hopper 21 for buffering.

[0088] In the sand-water separation unit, the grits separated by the sand-water separator 22 are conveyed by the first-stage horizontal conveying screw 23 to the press 24 for dewatering. After that, they are conveyed by the second-stage conveying screw 25 to the sand-water separation drying system for heating and drying treatment and then sent to the sand-water separation buffer hopper 26 for buffering.

[0089] The above step S2 specifically includes:

[0090] Adsorb the pretreated screenings and grits in step S1 to the gas-solid separator 27 and then fall into the buffer hopper 28. After being cut and crushed again by the feeding rotary valve 29, they enter the docking port 30.

[0091] The above step S3 specifically includes:

[0092] Place two collection and transportation buckets on the workbench 1. The screenings and grits in the docking port 30 fall into one of the collection and transportation buckets and are compressed by the hydraulic push rod 31. When the compression pressure reaches the set value, it means that the collection and transportation bucket is full.

[0093] At this time, the workbench 2 moves horizontally through the telescopic docking device 32, places another empty collection and transportation bucket under the docking port 30 to continue filling with screenings and grits, transports and removes the full collection and transportation bucket, and places an empty collection and transportation bucket on the workbench 1 again. Operate in this cycle.

[0094] Combined with Figure 6As shown, the motors of two Roots blowers 34 (one in use and one in reserve) drive the operation to generate negative pressure in the negative pressure pipeline 2, and finally absorb the grid residues into the buffer hopper 28.

[0095] The feeding rotary valve 29 is driven by a motor, and the grid residues falling from the buffer hopper 28 are sent into the collecting and transporting box after being cut.

[0096] Combined with Figure 7 As shown, a cooling fan is also equipped on the feeding rotary valve 29, and the cooling fan is driven by a motor (as shown in the dotted-line frame in Figure 7 ) to rotate to achieve the purpose of cooling.

[0097] The feeding rotary valve 29 is driven by a motor (as shown in the solid-line frame in Figure 7 ) to realize opening and closing.

[0098] Low positions and high positions are also set on the coarse grid buffer hopper 10, medium grid buffer hopper 15, fine grid buffer hopper 21, and sand and water separation buffer hopper 26, and the input signals are as shown in Figure 8 .

[0099] The fault signal input of the Roots blower 34 is as shown in the dotted-line frame part in Figure 9 .

[0100] The fault signal input of the feeding rotary valve 29 is as shown in the solid-line frame part in Figure 9 .

[0101] A variety of butterfly valves, ball valves and three-way valves are set on the negative pressure pipeline 2, and the switch signals of the valves are as shown in the solid-line frame part in Figure 10 .

[0102] After the grid residue vacuum conveying and collecting control system of the present utility model runs to meet the requirements of the ultra-clean space, under normal operation conditions, the grid residue vacuum conveying and collecting control system of the present utility model can be started in a hierarchical and regional manner. And on the premise that the flue gas meets the standards, by further exploring the opening time and frequency of the warm air blower, the purpose of energy conservation and consumption reduction can be achieved.

[0103] The transformation of the ultra-clean space in the pretreatment of the sewage treatment plant is a major engineering project in Shanghai and also the first application in the pretreatment area of the sewage treatment plant. As an important technology in the transformation plan of the ultra-clean space in the pretreatment of the sewage treatment plant, the present utility model improves the transformation plan of the ultra-clean space in the pretreatment of the sewage treatment plant, solves the adverse impact on the environment during the grid residue conveying process, and the original need for manual participation, reduces the operation cost, and the problems such as large grid residue blocks, high water content, and weak loading capacity, laying a foundation for the subsequent further transformation of the ultra-clean space in the pretreatment.

[0104] Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as within the scope of the spirit of the present invention, changes and modifications to the above-described embodiments will fall within the scope of the claims of the present invention.

Claims

1. A screenings vacuum conveying and collection control system, characterized in that: It includes a control console, a coarse grid unit, a medium grid unit, a fine grid unit, a sand-water separation unit, a collecting and discharging unit and a workbench; The coarse grid unit, the medium grid unit, the fine grid unit and the sand-water separation unit are all connected to the collecting and discharging unit through a negative pressure pipeline; The negative pressure pipe is connected to a negative pressure chamber, so that negative pressure is generated in the negative pressure pipe, and the screen residue pre-treated by the coarse screen unit, the medium screen unit, the fine screen unit, and the sand-water separation unit is adsorbed into the collection and discharge unit; The workbench is a double-top workbench for placing the transport barrels; The workbench is arranged in the garbage collection and transportation room and corresponds to the collection and discharge unit; The negative pressure pipeline is also provided with a plurality of air pressure sensors, and the air pressure sensors establish data communication with the console to determine whether blockage occurs in the negative pressure pipeline; The control console is used to realize the automatic control of the screenings vacuum conveying and collecting control system.

2. The screenings vacuum conveying and collecting control system according to claim 1, characterized in that: The coarse grid unit, the medium grid unit, the fine grid unit, and the sand-water separation unit are all arranged in a closed space in the underground layer; The collecting and discharging unit and the working platform are both arranged in the working area of ​​the ground floor.

3. The screenings vacuum conveying and collecting control system according to claim 1, characterized in that: The coarse grid unit comprises a coarse grid, a shaftless screw conveyor, a screw press, a primary conveying screw, a crusher, a secondary conveying screw, a coarse grid buffer hopper and a coarse grid drying system connected in sequence; The coarse grid buffer hopper is connected to the collecting and discharging unit through the negative pressure pipeline.

4. The screenings vacuum conveying and collecting control system according to claim 1, characterized in that: The middle grid unit comprises a middle grid, a screw conveyor, a press, a primary conveying screw, a crusher, a secondary conveying screw, a middle grid buffer hopper and a middle grid drying system connected in sequence; The middle grid buffer hopper is connected to the collecting and discharging unit through the negative pressure pipeline.

5. The screenings vacuum conveying and collecting control system according to claim 1, characterized in that: The fine grid unit comprises a fine grid, a press, a first-stage transverse conveying screw, a second-stage press dehydrator, a second-stage conveying screw, a fine grid buffer hopper and a fine grid drying system connected in sequence; The fine grid buffer hopper is connected to the collecting and discharging unit through the negative pressure pipeline.

6. The screenings vacuum conveying and collecting control system according to claim 1, characterized in that: The sand-water separation unit comprises a sand-water separator, a primary transverse conveying screw, a press dehydrator, a secondary conveying screw, a sand-water separation buffer hopper and a sand-water separation drying system connected in sequence; The sand-water separation buffer hopper is connected to the collecting and discharging unit through the negative pressure pipeline.

7. The screenings vacuum conveying and collecting control system according to claim 1, characterized in that: The collecting and discharging unit comprises a gas-solid separator, a buffer hopper, a discharging rotary valve and a docking port which are connected in sequence; The gas-solid separator is connected to the coarse grid unit, the medium grid unit, the fine grid unit, and the sand-water separation unit; The docking port corresponds to the workbench.

8. The screenings vacuum conveying and collecting control system according to claim 7, characterized in that: The unloading rotary valve adopts a spiral bevel cutting structure.

9. The screenings vacuum conveying and collecting control system according to claim 1, characterized in that: A hydraulic push rod for compressing the screen residue in the collecting and transporting bucket is also provided above the workbench.

10. The screenings vacuum conveying and collecting control system according to claim 1, characterized in that: There are two negative pressure chambers; Each of the negative pressure chambers is provided with a Roots blower.

11. The screenings vacuum conveying and collecting control system according to claim 1, characterized in that: The console is equipped with a PLC programmable controller and an HMI human-machine interaction interface.

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