A system and method for vacuum delivery and collection of cellulosic residues

Abstract

The application discloses a kind of grid residue vacuum conveying collection control systems and methods, including control console, coarse grid unit, middle grid unit, fine grid unit, sand-water separation unit, collection discharge unit and workbench;Coarse grid unit, middle grid unit, fine grid unit and sand-water separation unit are connected with collection discharge unit by negative pressure pipeline;Negative pressure pipeline is connected with negative pressure chamber;Workbench uses double tabletop workbench;Workbench is located in garbage collection house, and corresponds with collection discharge unit;Negative pressure pipeline is also provided with multiple air pressure sensors, and air pressure sensor establishes data communication with control console, to determine whether blockage is generated in negative pressure pipeline;Control console is used to realize the automation control of grid residue vacuum conveying collection control system.The application reduces the influence of surrounding environment, unmanned operation reduces operating cost, grid residue cleaning and transporting required time and cleaning and transporting vehicle collection frequency, makes sewage treatment technology overall environment can be promoted to a new level, and improves operating efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to sewage treatment technology, more particularly to a grid residue vacuum conveying collection control system and method. BACKGROUND

[0002] At present, the sewage treatment equipment of the whole sewage treatment plant is generally placed on the ground and operated in an open environment, and the generated grid residue is loaded in the collection barrel and manually transported and concentrated in the garbage room, and finally poured into the garbage collection truck one barrel at a time.

[0003] However, the above operation method still has many defects:

[0004] 1) The grid residue is directly loaded into the collection barrel without going through the drying, crushing and other process steps, so the water content and volume of the grid residue are relatively large, which limits the loading capacity of a single collection barrel;

[0005] 2) The collection barrel will emit odor during the manual transportation process of one person and one barrel;

[0006] 3) The collection barrel has a work load of about 30-40 barrels per day, and after the collection truck arrives, it still needs to be poured into the collection truck one barrel at a time, which is very time-consuming and labor-intensive.

[0007] In summary, the existing grid residue cleaning and transportation method requires manual transportation, slow transportation speed, has an impact on the external environment during transportation, and the grid residue has not been treated by drying, crushing and other processes, so the volume is relatively large and not compact, which requires a high collection frequency of the collection truck, and the grid residue cleaning and transportation process takes a lot of time.

[0008] If the existing method is still used, in the case of increasing water quantity and grid residue quantity, a large number of collection barrels need to be added, but the existence of a large number of collection barrels will also have an adverse impact on the surrounding environment. SUMMARY

[0009] In view of the defects in the prior art, the purpose of the present application is to provide a grid residue vacuum conveying collection control system and method, which reduces the impact on the external environment, reduces the operating cost of unmanned operation, reduces the time required for grid residue cleaning and transportation, and reduces the collection frequency of the collection truck, so that the overall environment of the sewage treatment technology can be improved, and the operating efficiency is improved.

[0010] To achieve the above purpose, the present application adopts the following technical solutions:

[0011] The present application provides a grid residue vacuum conveying collection control system in the first aspect, which comprises a control 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.

[0012] The coarse grid unit, the medium grid unit, the fine grid unit and the sand-water separation unit are communicated with the collection and discharge unit through negative pressure pipes;

[0013] A negative pressure chamber is connected to the negative pressure pipes to generate negative pressure in the negative pressure pipes, so that the pretreated grid residue of the coarse grid unit, the medium grid unit, the fine grid unit and the sand-water separation unit is adsorbed into the collection and discharge unit;

[0014] The workbench is a double-table workbench for placing collection barrels;

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

[0016] A plurality of air pressure sensors are further arranged on the negative pressure pipes, and the air pressure sensors are in data communication with the control console to determine whether the negative pressure pipes are blocked;

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

[0018] Preferably, the coarse grid unit, the medium grid unit, the fine grid unit and the sand-water separation unit are arranged in a closed space of an underground layer;

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

[0020] Preferably, the coarse grid unit comprises a coarse grid, an axis-free screw conveyor, a screw press, a first conveying screw, a crusher, a second conveying screw, a coarse grid buffer hopper and a coarse grid drying system connected in sequence;

[0021] The coarse grid buffer hopper is communicated with the collection and discharge unit through the negative pressure pipes.

[0022] Preferably, the medium grid unit comprises a medium grid, a screw conveyor, a press, a first conveying screw, a crusher, a second conveying screw, a medium grid buffer hopper and a medium grid drying system connected in sequence;

[0023] The medium grid buffer hopper is communicated with the collection and discharge unit through the negative pressure pipes.

[0024] Preferably, the fine grid unit comprises a fine grid, a press, a first horizontal conveying screw, a second press dehydrator, a second conveying screw, a fine grid buffer hopper and a fine grid drying system connected in sequence;

[0025] The fine grid buffer hopper is communicated with the collection and discharge unit through the negative pressure pipes.

[0026] Preferably, the sand-water separation unit comprises a sand-water separator, a first lateral conveying screw, a press dewatering machine, a second conveying screw, a sand-water separation buffer hopper and a sand-water separation drying system connected in sequence.

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

[0028] Preferably, the collection and discharge unit comprises a gas-solid separator, a buffer hopper, a rotary valve and a docking port connected in sequence.

[0029] The gas-solid separators are connected to the coarse grid unit, the medium grid unit, the fine grid unit and the sand-water separation unit.

[0030] The docking port corresponds to the workbench.

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

[0032] Preferably, the workbench is further provided with a hydraulic push rod for compressing the grid sludge in the collection barrel.

[0033] Preferably, the negative pressure chamber is provided with two rooms.

[0034] Each of the negative pressure chambers is provided with a Roots blower.

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

[0036] The second aspect of the present application provides a grid sludge vacuum conveying and collecting control method, which is executed by the grid sludge vacuum conveying and collecting control system provided in the first aspect of the present application.

[0037] S1, pretreating the grid sludge and the sand by the coarse grid unit, the medium grid unit, the fine grid unit and the sand-water separation unit.

[0038] S2, starting the Roots blower in the negative pressure chamber to generate negative pressure in the negative pressure pipeline and adsorb the pretreated grid sludge and sand to the collection and discharge unit.

[0039] S3, placing the grid sludge and sand treated by the collection and discharge unit into the collection barrel on the workbench.

[0040] Preferably, the step S1 specifically comprises:

[0041] In the coarse grid unit, the grid residues from the coarse grid are dewatered by the screw press, then transported to the crusher by the first conveying screw, crushed and shaped, heated and dried by the coarse grid drying system, and then stored in the coarse grid buffer hopper by the second conveying screw.

[0042] In the medium grid unit, the grid residues from the medium grid are dewatered by the press, then transported to the crusher by the first conveying screw, crushed and shaped, heated and dried by the medium grid drying system, and then stored in the medium grid buffer hopper by the second conveying screw.

[0043] In the fine grid unit, the grid residues from the fine grid are dewatered by the press, then transported to the second press dewatering machine by the first horizontal conveying screw, dewatered again, heated and dried by the fine grid drying system, and then stored in the fine grid buffer hopper.

[0044] In the sand-water separation unit, the settled sand separated by the sand-water separator is dewatered by the press, then transported to the sand-water separation drying system by the second conveying screw for heating and drying, and then stored in the sand-water separation buffer hopper.

[0045] Preferably, the step S2 specifically comprises:

[0046] The pretreated grid residues and settled sand are adsorbed to the gas-solid separator and then fall into the buffer hopper, and then cut and crushed again by the discharging rotary valve and enter the docking port.

[0047] Preferably, the step S3 specifically comprises:

[0048] The two collection barrels are placed on the workbench, the grid residues and settled sand fall into one of the collection barrels, and the hydraulic push rod is used for compression treatment, and when the compression pressure reaches the set value, it means that the collection barrel is full.

[0049] At this time, the workbench moves horizontally to place another empty collection barrel under the docking port to continue filling the grid residues and settled sand, and the full collection barrel is transported away, and an empty collection barrel is placed on the workbench, and the operation is repeated.

[0050] The grid residue vacuum conveying and collecting control system and method provided by the application has the following advantages:

[0051] (1) The present application solves the adverse effects on the environment during the conveying process of the grid residue

[0052] The original grid residue is processed in an open environment on the ground layer, and needs to be loaded by a garbage can, then manually transported to the ground transportation layer for storage, and waits for transfer. The manual transportation passes through the pretreatment area, and the poor sealing performance of the garbage can affects the surrounding environment, which seriously affects the surrounding environment.

[0053] The present application processes the grid residue by conveying it to the crushing, pressing, drying and other mechanisms through a closed pipeline, and then sends it into the gas-solid separator hopper through a pipeline. The crushing, pressing, drying and other mechanisms are placed in a sealed space underground, realizing fully closed conveying process, and not affecting the pretreatment area and the surrounding environment.

[0054] (2) The present application solves the problem of manual participation, and reduces the operating cost

[0055] The PLC programmable controller is used for control, and the HMI human-computer interaction interface is used for monitoring and setting to adjust the running of each device. After the present application is set to automatic operation, it can be operated without people, saving labor costs.

[0056] (3) The present application solves the problem of large grid residue block, high water content and weak loading capacity

[0057] The original grid residue is directly loaded into a garbage can by a conveyor, and then manually transported to a transfer area. The grid residue block has a large volume and high water content, and the garbage can transfer vehicle needs to be loaded once every 1-2 days, with high frequency.

[0058] Through the present application, the grid residue is crushed, pressed and dried, and the water content and volume are effectively reduced. Finally, the grid residue is loaded into a garbage can through a gas-solid separation hopper. The garbage transfer box has a hydraulic thrust compression device. 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 DRAWINGS

[0059] Figure 1 is a schematic diagram of the frame structure of the grid residue vacuum conveying and collecting control system of the present application;

[0060] 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 application;

[0061] 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 application;

[0062] Figure 4is the structural schematic view of the collecting and discharging unit in the grid residue vacuum conveying and collecting control system of the present application;

[0063] Figure 5 is the flow schematic view of the grid residue vacuum conveying and collecting control method of the present application;

[0064] Figure 6 is the motor circuit schematic view of the Roots blower and the discharging rotary valve in the grid residue vacuum conveying and collecting control system of the present application;

[0065] Figure 7 is the motor main circuit schematic view of the discharging rotary valve in the grid residue vacuum conveying and collecting control system of the present application;

[0066] Figure 8 is the input signal circuit schematic view of the coarse grid buffer hopper, the medium grid buffer hopper, the fine grid buffer hopper and the sand-water separation buffer hopper in the grid residue vacuum conveying and collecting control system of the present application;

[0067] Figure 9 is the fault signal input circuit schematic view of the Roots blower and the discharging rotary valve in the grid residue vacuum conveying and collecting control system of the present application;

[0068] Figure 10 is the opening and closing signal input circuit schematic view of various valves on the negative pressure pipeline in the grid residue vacuum conveying and collecting control system of the present application. DETAILED DESCRIPTION

[0069] In order to better understand the above technical solutions of the present application, the technical solutions of the present application are further described below in combination with the drawings and embodiments.

[0070] In order to fundamentally solve the problems of inconvenience in conveying, emission of foul odor and the like existing in the collection and conveying process of the grid residue and sand in the prior art, and to ensure the overall environment of the pretreatment workshop of the sewage plant and the health of the workers, through in-depth analysis and research on the pretreatment workshop of the sewage plant, the original sewage pretreatment area arranged on the ground is finally transferred to a sealed underground space for treatment. The present application uses the vacuum adsorption principle and utilizes the pipeline type closed conveying to convey the grid residue and sand and other garbage to various pretreatment units for treatment, and then to the ground layer for transfer through the pipeline type closed conveying. The ground layer part can be transformed into a garden and the like landscape. On this basis, the reconstruction of the sewage plant pretreatment super-clean space is completed, so as to reduce the environmental pollution in the sewage treatment process, effectively improve the plant area environment of the sewage plant, and improve the air quality of the plant area.

[0071] In combination with Figure 1 As shown in the figure, the grid residue vacuum conveying and collecting control system provided by the present application comprises 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 1.

[0072] The coarse grid unit, the middle grid unit, the fine grid unit and the sand-water separation unit are connected with the collecting and discharging unit through the negative pressure pipeline 2.

[0073] The negative pressure chamber 3 is connected to the negative pressure pipeline 2, so that the negative pressure is generated in the negative pressure pipeline 2, and the grid sludge and the sand adsorbed after the pretreatment of the coarse grid unit, the middle grid unit, the fine grid unit and the sand-water separation unit are sucked into the collecting and discharging unit.

[0074] The workbench 1 is a double-table workbench, and two collection barrels are placed on the workbench 1 to be exchanged.

[0075] The workbench 1 is installed in the garbage collection room 4 and corresponds to the collecting and discharging unit.

[0076] The negative pressure pipeline 2 is further provided with a plurality of air pressure sensors 5, the air pressure sensors 5 are in data communication with the control console, and the air pressure sensors 5 are used to determine whether the negative pressure pipeline 2 is blocked and to send an alarm prompt.

[0077] The control console is provided with a PLC programmable controller and an HMI human-computer interaction interface. The PLC programmable controller is used to realize the automatic control of the grid sludge vacuum conveying and collecting control system, and manual intervention is not required. Each unit automatically performs each step of work according to the preset program of the PLC programmable controller. The HMI human-computer interaction interface is used to monitor and adjust the grid sludge vacuum conveying and collecting control system. The PLC programmable controller input and output control points are also used to control and monitor all moving parts and signal feedback.

[0078] The coarse grid unit, the middle grid unit, the fine grid unit and the sand-water separation unit are arranged in a closed space in the underground layer, and are connected through the negative pressure pipeline 2, so that the whole process is closed to prevent odor from being discharged.

[0079] As shown in Figure 1 and Figure 2 , the coarse grid unit comprises a coarse grid 6, an axis-free screw conveyor, a screw press 7, a first-stage conveying screw, a crusher 8, a second-stage conveying screw 9, a coarse grid drying system and a coarse grid buffer hopper 10 which are sequentially connected.

[0080] As shown in Figure 1 and Figure 3 , the middle grid unit comprises a middle grid 11, a screw conveyor, a press 12, a first-stage conveying screw, a crusher 13, a second-stage conveying screw 14, a middle grid drying system and a middle grid buffer hopper 15 which are sequentially connected.

[0081] The fine grid unit comprises a fine grid 16, a press 17, a first-stage transverse conveying screw 18, a second press dewatering machine 19, a second-stage conveying screw 20, a fine grid drying system and a fine grid buffer hopper 21 which are sequentially connected.

[0082] The sand-water separation unit comprises, in sequence, a sand-water separator 22, a first-stage transverse conveying screw 23, a press dewaterer 24, a second-stage conveying screw 25, a sand-water separation drying system, and a sand-water separation buffer hopper 26.

[0083] In combination Figure 1 and Figure 4 As shown, the collection discharge unit comprises, in sequence, a gas-solid separator 27, a buffer hopper 28, a discharge rotary valve 29, and a docking interface 30.

[0084] 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.

[0085] The docking interface 30 corresponds to the workbench 1.

[0086] The grid residue in the fine grid unit and the sand-water separation unit is preliminarily pressed by the press, and then heated and dried by the drying system (high-pressure hot air blower), and finally sent to the gas-solid separator 27 on the ground layer through the negative pressure pipeline 2.

[0087] The larger grid residue in the coarse grid unit and the medium grid unit is crushed by the crusher, and then heated and dried by the drying system, and finally sent to the gas-solid separator 27 on the ground layer through the negative pressure pipeline 2.

[0088] The grid residue and the sand in the gas-solid separator 27 fall into the buffer hopper 28, and the grid residue and the sand in the buffer hopper 28 enter the docking interface 30 from the continuously running discharge rotary valve 29. The discharge rotary valve 29 adopts a spiral bevel cutting structure to further cut and crush the grid residue.

[0089] Above the workbench 1, a hydraulic push rod 31 is further arranged to compress the grid residue in the collection barrel. When the compression pressure reaches the set value, it means that the collection barrel is full of grid residue and needs to be cleaned and transported.

[0090] The workbench 1 adopts a double-table workbench to place two collection barrels for exchange. The empty collection barrel is placed on the idle workbench 1, and the workbench 1 moves left and right through the telescopic docking device 32 to move the empty collection barrel to the working position (below the docking interface 30), and the full collection barrel is removed from the working position and can be loaded into a vehicle for transportation.

[0091] The collection barrel can adopt an integrated stainless steel compression box

[0092] The docking interface 30 and the working position on the workbench 1 can be accurately aligned through the photoelectric docking control device 33.

[0093] In combination Figure 1As shown, the negative pressure chamber 3 is provided with two, one for one, and each negative pressure chamber 3 is provided with a Roots blower 34.

[0094] In combination Figure 5 As shown, the present application also provides a grid residue vacuum conveying and collecting control method, which adopts the grid residue vacuum conveying and collecting control system of the present application to execute the following steps:

[0095] S1, the grid residue and sand are pretreated through the coarse grid unit, the medium grid unit, the fine grid unit and the sand-water separation unit;

[0096] S2, the Roots blower 34 in the negative pressure chamber 3 is started to generate negative pressure in the negative pressure pipeline 2, and the pretreated grid residue and sand are adsorbed to the collecting and discharging unit;

[0097] S3, the grid residue and sand treated by the collecting and discharging unit are put into the collection barrel on the workbench 1.

[0098] The above step S1 specifically includes:

[0099] In the coarse grid unit, the grid residue from the coarse grid 6 is dehydrated by the screw press 7, then conveyed to the crusher 8 by the first conveying screw for breaking and shaping treatment, then heated and dried by the coarse grid drying system, and then conveyed to the coarse grid buffer hopper 10 by the second conveying screw 9.

[0100] In the medium grid unit, the grid residue from the medium grid 11 is dehydrated by the press 12, then conveyed to the crusher 13 by the first conveying screw for breaking and shaping treatment, then heated and dried by the medium grid drying system, and then conveyed to the medium grid buffer hopper 21 by the second conveying screw 20.

[0101] In the fine grid unit, the grid residue from the fine grid 16 is preliminarily dehydrated by the press 17, then conveyed to the second press dehydrator 19 by the first horizontal conveying screw 18 for two-way press dehydration, then heated and dried by the fine grid drying system, and then sent to the fine grid buffer hopper 21.

[0102] In the sand-water separation unit, the sand after separation by the sand-water separator 22 is dehydrated by the press 24, then conveyed to the sand-water separation drying system by the second conveying screw 25 for heating and drying treatment, and then sent to the sand-water separation buffer hopper 26.

[0103] The above step S2 specifically includes:

[0104] The pretreated grid residue and sand in step S1 are adsorbed to the gas-solid separator 27 and then fall into the buffer hopper 28, and then cut and crushed again by the rotating valve 29 to enter the docking port 30.

[0105] The above step S3 specifically includes:

[0106] Two collection bins are placed on the workbench 1. The screenings and sediment in the interface 30 fall into one of the collection bins and are compressed by the hydraulic push rod 31. When the compression pressure reaches the set value, it means that the collection bin is full.

[0107] At this time, the workbench 2 moves laterally through the telescopic docking device 32, placing another empty collection bucket below the docking interface 30 to continue filling with screenings and sediment. The filled collection bucket is then transferred away, and an empty collection bucket is placed back onto the workbench 1. This cycle is repeated.

[0108] Combination Figure 6 As shown, the motor-driven operation of the two Roots blowers 34 (one in use and one on standby) generates negative pressure in the negative pressure pipeline 2, which ultimately absorbs the screenings into the buffer hopper 28.

[0109] The discharge rotary valve 29 is driven by a motor, which cuts the screenings falling from the buffer hopper 28 and sends them into the collection box.

[0110] Combination Figure 7 As shown, the rotary valve 29 is also equipped with a cooling fan, which is powered by a motor (such as...). Figure 7 (As shown in the dashed box) The drive rotation achieves the purpose of cooling.

[0111] The rotary valve 29 for feeding is controlled by a motor (e.g., Figure 7 (As shown in the solid line box) The driver is used to turn the device on and off.

[0112] The coarse screen buffer hopper 10, medium screen buffer hopper 15, fine screen buffer hopper 21, and sand-water separation buffer hopper 26 are all equipped with low and high positions, and the input signals are as follows: Figure 8 As shown.

[0113] The fault signal input for the Roots blower 34 is as follows: Figure 9 The area shown in the dashed box is as follows.

[0114] The fault signal input for the rotary valve 29 is as follows: Figure 9 The solid line box section is shown.

[0115] Various butterfly valves, ball valves, and three-way valves are installed on the negative pressure pipeline 2. The valve opening and closing signals are as follows: Figure 10 The solid line box section is shown.

[0116] The grid residue vacuum conveying and collecting control system can be opened in stages and in regions under normal operation after reaching the requirement of super-clean space.

[0117] The reconstruction of the pretreatment super-clean space of the sewage plant is a major engineering project in Shanghai and is also the first application in the pretreatment area of the sewage plant. The present application is one of the important technologies in the reconstruction scheme of the pretreatment super-clean space of the sewage plant, perfects the reconstruction scheme of the pretreatment super-clean space of the sewage plant, solves the adverse effects on the environment in the process of conveying the grid residue, reduces the operation cost by eliminating the need for manual participation, and solves the problems of large grid residue blocks, high water content, weak loading capacity and the like, thereby laying a foundation for further reconstruction of the pretreatment super-clean space.

[0118] Those skilled in the art of the present technology field should recognize that the above embodiments are only used to illustrate the present application, and are not used as a limitation on the present application, and as long as the above described embodiments are changed and modified within the scope of the spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A vacuum conveying and collecting control system for screenings, characterized in that: The control console, the coarse grid unit, the middle grid unit, the fine grid unit, the sand-water separation unit, the collection and discharge unit and the workbench are included; The coarse grid unit, the middle grid unit, the fine grid unit and the sand-water separation unit are communicated with the collection and discharge unit through the negative pressure pipeline; The negative pressure chamber is connected to the negative pressure pipeline, so that the negative pressure is generated in the negative pressure pipeline, and the pretreated grid sludge of the coarse grid unit, the middle grid unit, the fine grid unit and the sand-water separation unit is adsorbed into the collection and discharge unit; The workbench is a double table type workbench used for placing the collection barrel; The workbench is arranged in the garbage collection room and corresponds to the collection and discharge unit; The negative pressure pipeline is further provided with a plurality of air pressure sensors, and the air pressure sensors are in data communication with the control console to determine whether the negative pressure pipeline is blocked; The control console is used to realize the automatic control of the grid sludge vacuum conveying and collecting control system.

2. The grid residue vacuum conveying collection control system of claim 1, wherein: The coarse grid unit, the middle grid unit, the fine grid unit and the sand-water separation unit are arranged in the closed space of the underground layer; The collection and discharge unit and the workbench are arranged in the working area of the ground layer.

3. The grid residue vacuum conveying collection control system of claim 1, wherein: The coarse grid unit includes a coarse grid, an axisless screw conveyor, a screw press, a first conveying screw, a crusher, a second conveying screw, a coarse grid buffer hopper and a coarse grid drying system connected in sequence; The coarse grid buffer hopper is communicated with the collection and discharge unit through the negative pressure pipeline.

4. The grid residue vacuum conveying collection control system of claim 3, wherein: The middle grid unit includes a middle grid, a screw conveyor, a press, a first conveying screw, a crusher, a second conveying screw, a middle grid buffer hopper and a middle grid drying system connected in sequence; The middle grid buffer hopper is communicated with the collection and discharge unit through the negative pressure pipeline.

5. The grid residue vacuum conveying collection control system of claim 4, wherein: The fine grid unit includes a fine grid, a press, a first horizontal conveying screw, a second press dehydrator, a second conveying screw, a fine grid buffer hopper and a fine grid drying system connected in sequence; The fine grid buffer hopper is communicated with the collection and discharge unit through the negative pressure pipeline.

6. The grid residue vacuum conveying collection control system of claim 5, wherein: The sand-water separation unit includes a sand-water separator, a first horizontal conveying screw, a press dehydrator, a second 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 communicated with the collection and discharge unit through the negative pressure pipeline.

7. The grid residue vacuum conveying collection control system of claim 6, wherein: The collection and discharge unit includes a gas-solid separator, a buffer hopper, a discharging rotary valve and a docking port connected in sequence; The gas-solid separator is communicated with the coarse grid unit, the middle grid unit, the fine grid unit and the sand-water separation unit; The docking port corresponds to the workbench.

8. The grid residue vacuum conveying collection control system of claim 7, wherein: The discharging rotary valve adopts a spiral bevel cutting structure.

9. The grid residue vacuum conveying collection control system of claim 7, wherein: The workbench is further provided with a hydraulic push rod for compressing the grid sludge in the collection barrel.

10. The grid residue vacuum conveying collection control system of claim 8, wherein: The negative pressure chamber has two rooms; Each room of the negative pressure chamber is provided with a Roots blower.

11. The grid residue vacuum conveying collection control system of claim 1, wherein: The control console is provided with a PLC programmable controller and an HMI human-machine interface.

12. A method for controlling the vacuum transport and collection of cellulosic residues, characterized in that The grid sludge vacuum conveying and collecting control system of claim 10 is used to perform the following steps: S1, the coarse grid unit, the medium grid unit, the fine grid unit and the sand water separation unit are used to pretreat the bar screen residue and the sand; S2, the roots blower in the negative pressure chamber is started to generate negative pressure in the negative pressure pipeline, and the pretreated bar screen residue and sand are adsorbed to the collection and discharge unit; S3, the bar screen residue and sand treated by the collection and discharge unit are put on the workbench and placed in the collection barrel.

13. The method of claim 12, wherein the method further comprises: The step S1 specifically comprises: In the coarse grid unit, the bar screen residue from the coarse grid is dewatered by the screw press, then transported by the first conveying screw to the crusher for breaking and shaping, and then heated and dried by the coarse grid drying system, and then transported by the second conveying screw to the coarse grid buffer hopper for buffering; In the medium grid unit, the bar screen residue from the medium grid is dewatered by the press, then transported by the first conveying screw to the crusher for breaking and shaping, and then heated and dried by the medium grid drying system, and then transported by the second conveying screw to the medium grid buffer hopper for buffering; In the fine grid unit, the bar screen residue from the fine grid is preliminarily dewatered by the press, then transported by the first horizontal conveying screw to the second dewatering press for two-way dewatering, and then heated and dried by the fine grid drying system and sent to the fine grid buffer hopper for buffering; In the sand water separation unit, the sand separated by the sand water separator is dewatered by the press, and then transported by the second conveying screw to the sand water separation drying system for heating and drying treatment and sent to the sand water separation buffer hopper for buffering.

14. The method of claim 13, wherein the method further comprises: The step S2 specifically comprises: The pretreated bar screen residue and sand are adsorbed to the gas-solid separator and then fall into the buffer hopper, and then cut and crushed again by the rotary valve to enter the docking port.

15. The method of claim 14, wherein the method further comprises: The step S3 specifically comprises: Two collection barrels are placed on the workbench, the bar screen residue and sand fall into one of the collection barrels through the docking port, and are compressed by the hydraulic push rod, and when the compression pressure reaches the set value, it means that the collection barrel is full; At this time, the workbench moves horizontally to place another empty collection barrel under the docking port to continue filling the bar screen residue and sand, and the full collection barrel is transported away, and an empty collection barrel is placed on the workbench, and the operation is repeated.

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