Dry-wet separation process and device based on municipal street sweeping soil hydrated sludge

Abstract

This invention discloses a process and apparatus for dry-wet separation of hydrated sludge from municipal street sweeping soil, comprising the following steps: receiving and removing impurities from a silo; simultaneously pouring and separating the sludge into wet and dry filtrate after the impurity removal process; lifting the filtrate from the sludge after the simultaneous pouring and separating process; and screw extrusion of the sludge after the lifting process. This invention solves the technical problems in existing technologies where street sweeping soil with excessively high water content is difficult to dehydrate sufficiently before transfer, leading to secondary pollution from litter landing and low overall collection and transportation efficiency of street sweeping soil.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, and more specifically, to a process and apparatus for dry-wet separation of hydrated sludge based on municipal street sweeping soil. Background Technology

[0002] Currently, to improve the quality of sanitation operations, road sweeping has shifted from primarily dry sweeping to primarily washing and sweeping. While ensuring high-quality operations, this has also brought new problems, namely, the excessively high moisture content of the street sweeping soil. The street sweeping soil collected during washing and sweeping operations contains a large amount of water, and a large amount of wastewater is mixed in again during the unloading and washing process, resulting in the high moisture content of the dry components failing to meet the receiving requirements of the transfer station. At the same time, the excessively high moisture content of the street sweeping soil can easily cause screen clogging in the sorting equipment, and it can also pose a risk of secondary pollution during the transfer to the sorting station, thus affecting the lifespan of the transfer vehicles.

[0003] In existing technologies, the processing structure for street sweeping soil with excessive moisture content usually only involves draining without dehydration. The moisture content of the street sweeping soil treated by this method is still too high, and the material transported to the transfer station will have leakage problems during the transfer process, which will not meet the acceptance standards of the transfer station. Alternatively, the collected street sweeping soil is directly dumped on the unloading point or garbage bin after the operation is completed, and then the moisture is controlled by air drying before collection and transfer. This method has the disadvantages of garbage exposure, large on-site environmental pollution, long overall processing time, and large site area, which seriously affects the collection and transportation efficiency of street sweeping soil. Summary of the Invention

[0004] To address this, the present invention provides a process and apparatus for separating hydrated sludge from municipal street sweeping soil, thereby solving the technical problems in the prior art where street sweeping soil with excessively high water content is difficult to filter and dehydrate sufficiently before transportation, and is prone to causing on-site environmental pollution, resulting in low overall collection and transportation efficiency of street sweeping soil.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A process for separating hydrated sludge from municipal street sweeping soil into dry and wet phases includes the following steps:

[0007] Material receiving and impurity removal processes in the silo;

[0008] For mud that has completed the impurity removal process, a simultaneous dry-wet separation filtrate process is performed by unloading the mud.

[0009] A filtrate lifting process is performed on the mud material that has completed the simultaneous dry and wet separation filtrate process;

[0010] A spiral extrusion process is performed on the mud material after the filtrate lifting process.

[0011] Based on the above technical solution, the present invention is further described as follows:

[0012] As a further aspect of the present invention

[0013] The material receiving and impurity removal process of the silo specifically includes:

[0014] The street sweeping soil receiving bins are arranged in a sunken manner, with the top grid inlet of the receiving bins lower than the pre-drainage outlet of the sweeper, so that the sweeper can directly unload the sludge.

[0015] The effective storage volume of the receiving silo is set to be no less than 4m³. 3 It has the functions of storing materials, coarse separation and dewatering. During the sludge unloading process, the top grid inlet of the receiving silo intercepts large impurities, which are then cleaned and transported away for disposal.

[0016] As a further aspect of the present invention

[0017] The process of simultaneously separating the wet and dry filtrate from the mud after the impurity removal process specifically includes:

[0018] The mud that has undergone the impurity removal process passes through a screen and enters the receiving hopper;

[0019] The bottom plate and side plates of the receiving silo are equipped with isolation screens with a diameter range of 0.5 to 3 mm. The isolation screens of the receiving silo directly assist in the first step of dry-wet separation filtrate during unloading. That is, the wastewater in the mud is directly filtered and discharged through the screen during unloading, which significantly shortens the vehicle unloading time and reduces the disposal area.

[0020] Meanwhile, the isolation screen of the receiving hopper is equipped with a backwashing mechanism. The high-pressure water pump and control system of the backwashing mechanism clean the isolation screen regularly to ensure the normal operation of the equipment's separation function.

[0021] As a further aspect of the present invention

[0022] The process of lifting the filtrate from the mud material after the simultaneous dry-wet separation filtrate process includes:

[0023] The mud material that has completed the wet-dry separation filtrate process after being poured is further conveyed to the filter mud lifting structure. The filter mud lifting structure adopts a multi-key connection of a geared motor. The geared motor drives the chains on both sides inside the receiving hopper to move synchronously. At the same time, the scraper between the chains on both sides scrapes the mud material located on the isolation screen in the receiving hopper. Then, the mud material located on the isolation screen is lifted obliquely along the inclined surface of the output end of the receiving hopper by the action of the scraper. The scraper has several filtrate holes with an inner diameter range of 3-15mm. In this way, the mud material is lifted obliquely by gravity to complete the filtrate filtration.

[0024] As a further aspect of the present invention

[0025] The spiral extrusion process for the sludge after the filtrate lifting process specifically includes:

[0026] The mud material that has completed the filtrate lifting process is further conveyed to the spiral extrusion structure;

[0027] The spiral extrusion structure has a built-in spiral extrusion channel formed by motor-driven spiral blades. The motor-driven spiral blades adopt a variable pitch and variable diameter design, which allows the spiral extrusion channel to continuously switch the channel volume and extrude the mud that has completed the filtrate lifting process again to further reduce the moisture content of the mud.

[0028] A sludge dry-wet separation device for performing the aforementioned sludge dry-wet separation process, the sludge dry-wet separation device comprising:

[0029] The basic structure for the transmission system includes a horizontally placed filter chamber and a lifting filter chamber that are connected to each other.

[0030] A filter screen structure is correspondingly positioned at the top of the horizontal filter cavity.

[0031] The filter mud lifting structure is drivably and sequentially arranged in the flat filter chamber and the lifting filter chamber, and the filter mud lifting structure is located below the filter screen structure.

[0032] As a further aspect of the present invention

[0033] The horizontally positioned filter chamber extends horizontally as a receiving hopper.

[0034] The lifting filter chamber is obliquely extended, and the bottom end of the lifting filter chamber is connected to one side end of the flat filter chamber.

[0035] As a further aspect of the present invention

[0036] The filter screen structure includes a screen side baffle and a filter screen layer fixedly disposed on the inner side of the screen side baffle. The screen side baffle and the filter screen layer are both fixedly assembled at the top position of the flat filter cavity, and the filter screen layer is correspondingly connected to the interior of the flat filter cavity.

[0037] As a further aspect of the present invention

[0038] The filter mud lifting structure includes a geared motor, a first transmission sprocket, a second transmission sprocket, and a second transmission chain;

[0039] The first transmission sprocket is rotatably mounted inside the end of the flat filter chamber that is away from the lifting filter chamber, and the second transmission sprocket is rotatably mounted inside the end of the lifting filter chamber that is away from the flat filter chamber, and the first transmission sprocket and / or the second transmission sprocket are rotatably driven.

[0040] The base of the geared motor is fixedly mounted on the outer wall of the lifting filter cavity, and a first transmission chain is installed between the rotational kinetic energy output end of the geared motor and the second transmission sprocket.

[0041] The second transmission chain is mounted on the second transmission sprocket and the first transmission sprocket, and the second transmission chain is intermittently connected to several filtrate lifting trays along its travel path;

[0042] The filtrate lifting tray includes a tray body and a plurality of filtrate holes formed in the tray body.

[0043] As a further aspect of the present invention, it also includes:

[0044] The spiral extrusion structure includes a spiral extrusion shell and a motor-driven spiral blade that is interchangeably mounted at the center of the spiral extrusion shell.

[0045] A spiral extrusion channel is formed between the motor-driven spiral blades and the spiral extrusion shell, and the blade spacing of the motor-driven spiral blades gradually decreases so that the spiral extrusion channel gradually forms an extrusion effect.

[0046] The spiral extrusion channel is connected to the output end of the filter mud lifting structure.

[0047] The spiral extrusion shell and the motor-driven spiral blades are arranged vertically or obliquely.

[0048] The present invention has the following beneficial effects:

[0049] 1. This process has an automatic continuous conveying dry and wet separation function, which can significantly improve the removal rate and efficiency of street sweeping soil moisture through multi-stage process integration design, thereby effectively shortening the overall transfer operation cycle, reducing secondary pollution to the environment, and enhancing the overall practicality of the process function.

[0050] 2. This device can effectively serve as the transport route for sludge filtration through the transport base structure. At the same time, it can use the filter screen structure corresponding to the transport base structure to achieve the first step of filtering out impurities such as sand or branches. It can also use the filter mud lifting structure corresponding to the transport base structure to further lift and transport the filter mud after the first step of filtering. In this way, the mud-liquid separation filtration is achieved by the weight of the water body. The filtered mud can be transported to an external container for further processing, which improves the overall filtration efficiency and its functional practicality. Attached Figure Description

[0051] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The structures, proportions, sizes, etc., drawn in this specification are only used to complement the content disclosed in the specification, so that those skilled in the art can understand and read them. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0052] Figure 1 This is a schematic diagram of the overall process of the hydrated sludge dry-wet separation process based on municipal street sweeping soil provided in an embodiment of the present invention.

[0053] Figure 2 This is an isometric structural schematic diagram of a hydrated sludge dry-wet separation device based on municipal street sweeping soil provided in an embodiment of the present invention.

[0054] Figure 3 This is a top view schematic diagram of the hydrated sludge dry-wet separation device based on municipal street sweeping soil provided in an embodiment of the present invention.

[0055] Figure 4 The schematic diagram of the internal structure of the hydrated sludge dry-wet separation device based on municipal street sweeping soil provided in the embodiments of the present invention is shown in the side view from one side.

[0056] Figure 5 The side view of the hydrated sludge dry-wet separation device based on municipal street sweeping soil provided in the embodiment of the present invention is shown in the schematic diagram of the structure on the other side.

[0057] Figure 6 This is a schematic diagram of the overall application state structure of the hydrated sludge dry-wet separation device based on municipal street sweeping soil provided in an embodiment of the present invention.

[0058] Figure 7 This is an isometric structural diagram of the spiral extrusion structure in the hydrated sludge dry-wet separation device based on municipal street sweeping soil provided in an embodiment of the present invention.

[0059] Figure 8This is a schematic diagram of the internal structure of the spiral extrusion structure in the hydrated sludge dry-wet separation device based on municipal street sweeping soil provided in an embodiment of the present invention.

[0060] The attached diagram lists the components represented by each number as follows:

[0061] Conveying basic structure 1: horizontal filter chamber section 11, lifting filter chamber section 12, filter chamber outlet 13;

[0062] Filter screen structure 2: screen side baffle 21, filter screen layer 22, and discharge side baffle 23;

[0063] Filter mud lifting structure 3: geared motor 31, first transmission sprocket 32, second transmission sprocket 33, adjusting tension sprocket 34, first transmission chain 35, second transmission chain 36, filtrate lifting support plate 37;

[0064] Screw extrusion structure 4: screw extrusion shell 41, motor-driven screw blades 42, screw extrusion inlet 43, screw extrusion outlet 44, screw extrusion channel 45. Detailed Implementation

[0065] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0066] The terms "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0067] like Figure 1 As shown, this embodiment of the invention provides a hydrated sludge dry-wet separation process based on municipal street sweeping soil. It features automatic continuous conveying dry-wet separation, and through multi-stage integrated design, it significantly improves the removal rate and efficiency of moisture from the street sweeping soil. This effectively shortens the overall transportation cycle, reduces secondary pollution to the environment, and enhances the overall practicality of the process. Specifically, it includes the following steps:

[0068] S1: Material receiving and impurity removal process in the silo;

[0069] The specific process is as follows: the street sweeping soil receiving bin is arranged in a sunken manner on the ground, and the top grid inlet of the receiving bin is lower than the pre-drainage outlet of the sweeper, so that the sweeper can directly unload the sludge.

[0070] The effective storage volume of the receiving silo is set to be no less than 4m³. 3 It has the functions of storing materials, coarse separation and dewatering. During the sludge unloading process, the top grid inlet of the receiving silo intercepts large impurities. The intercepted large impurities are cleaned and transported away for treatment.

[0071] S2: For mud materials that have completed the impurity removal process, a simultaneous dry and wet separation filtrate process is performed by unloading the mud.

[0072] The specific process is as follows: the mud material that has completed the impurity removal process is passed through the screen to reach the inside of the receiving silo;

[0073] The bottom plate and side plates of the receiving silo are equipped with isolation screens with a diameter range of 0.5 to 3 mm. The isolation screens of the receiving silo directly assist in the first step of dry-wet separation filtrate during unloading. That is, the wastewater in the mud is directly filtered and discharged through the screen during unloading, which significantly shortens the vehicle unloading time and reduces the disposal area.

[0074] Meanwhile, the isolation screen of the receiving hopper is equipped with a backwashing mechanism. The high-pressure water pump and control system of the backwashing mechanism clean the isolation screen regularly to ensure the normal operation of the equipment's separation function.

[0075] S3: For mud materials that have completed the simultaneous dry and wet separation filtrate process, a filtrate lifting process is performed;

[0076] The specific process is as follows: The mud material that has completed the wet and dry separation filtrate process is further transported to the filter mud lifting structure. The filter mud lifting structure adopts a multi-key connection of a geared motor. The geared motor drives the chains on both sides inside the receiving bin to move synchronously. At the same time, the scraper between the chains on both sides scrapes the mud material located on the isolation screen in the receiving bin. Then, the mud material located on the isolation screen is lifted obliquely along the inclined surface of the output end of the receiving bin by the scraper. The scraper has several filtrate holes with an inner diameter range of 3 to 15 mm. In this way, the mud material is lifted obliquely and fully filtered by gravity.

[0077] S4: A spiral extrusion process is performed on the mud material that has completed the filtrate lifting process;

[0078] The specific process is as follows: the mud material that has completed the filtrate lifting process is further transported to the spiral extrusion structure;

[0079] The spiral extrusion structure has a built-in spiral extrusion channel formed by motor-driven spiral blades. The motor-driven spiral blades adopt a variable pitch and variable diameter design, which allows the spiral extrusion channel to continuously switch the channel volume and extrude the mud that has completed the filtrate lifting process again to further reduce the moisture content of the mud.

[0080] likeFigures 2 to 8 As shown in the figure, this embodiment of the invention also provides a sludge dry-wet separation device for performing a sludge dry-wet separation process, including a conveying base structure 1, a filter screen structure 2, and a filter mud lifting structure 3. The conveying base structure 1 effectively serves as the foundation for the sludge filtration conveying route. Simultaneously, the filter screen structure 2, corresponding to the conveying base structure 1, performs the first step of filtering out impurities such as sand or branches. The filter mud lifting structure 3, corresponding to the conveying base structure 1, further lifts and conveys the filter mud after the first step of impurity filtration. This utilizes the weight of the water to achieve sludge-liquid separation filtration, and the filtered sludge can be conveyed to an external container, improving the overall filtration efficiency. The specific settings are as follows:

[0081] Please refer to Figures 2 to 4 The conveying foundation structure 1 includes a horizontally placed filter chamber 11 and a lifting filter chamber 12 integrally fixedly connected; wherein, the horizontally placed filter chamber 11 extends horizontally as a receiving hopper, the lifting filter chamber 12 extends obliquely, and the bottom end of the lifting filter chamber 12 is connected to one side end of the horizontally placed filter chamber 11. The top lower part of the lifting filter chamber 12 has a filter chamber outlet 13, which is used to form a lifting, conveying and discharge route for sludge filtration.

[0082] Please continue to refer to this. Figures 2 to 4 The filter screen structure 2 includes a screen side baffle 21 and a filter screen layer 22 fixedly disposed on the inner side of the screen side baffle 21. The screen side baffle 21 and the filter screen layer 22 are both fixedly assembled at the top position of the flat filter cavity 11, and the filter screen layer 22 is correspondingly connected to the interior of the flat filter cavity 11, so as to effectively achieve the first step of filtering out sand blocks or branches and other debris by using the filter screen layer 22 corresponding to the conveying base structure 1.

[0083] As a preferred embodiment, the screen side baffle 21 is provided with a mud inlet, and the height of the outer edge of the screen side baffle 21 gradually increases from the side of the mud inlet toward the opposite side, so as to improve the blocking effect of the opposite side of the mud inlet through the screen side baffle 21, thereby reducing the overflow when dumping mud.

[0084] More preferably, please refer to Figure 6 The screen side baffle 21 is also fixedly provided with a material pouring side baffle 23 on both sides of the mud inlet, so as to further improve the material pouring blocking and overflow prevention performance through the material pouring side baffle 23.

[0085] Please refer to Figure 4 and Figure 5The filter mud lifting structure 3 includes a reduction motor 31, a first transmission sprocket 32, a second transmission sprocket 33, a directional tensioning sprocket 34, a first transmission chain 35, a second transmission chain 36, and a filtrate lifting support plate 37. The base of the reduction motor 31 is fixedly mounted on the outer wall of the lifting filter chamber 12. Two sets of the first transmission sprocket 32, the second transmission sprocket 33, and the directional tensioning sprocket 34 are provided. The two sets of first transmission sprockets 32 are respectively rotatably mounted on both sides of the end of the flat filter chamber 11 away from the lifting filter chamber 12. The two sets of second transmission sprockets 33 are respectively rotatably mounted on both sides of the end of the lifting filter chamber 12 away from the flat filter chamber 11. The two sets of directional tensioning sprockets 34 are rotatably mounted at the junction of the flat filter chamber 11 and the lifting filter chamber 12. The first transmission chain 35 is connected to the reduction motor 31. The rotational kinetic energy output end of 1 and the two sets of second transmission sprockets 33 are connected by a transmission assembly. Two sets of second transmission chains 36 are provided, and the two sets of second transmission chains 36 are respectively and sequentially connected to the two sets of second transmission sprockets 33, the two sets of adjusting tension sprockets 34 and the two sets of first transmission sprockets 32. Several filtrate lifting plates 37 are intermittently connected between the two sets of second transmission chains 36 along their travel path. The rotational kinetic energy output by the reduction motor 31 drives the second transmission chain 36 through the first transmission chain 35. The second transmission chain 36, in conjunction with the filtrate lifting plates 37, further lifts and guides the filter mud that has fallen to the bottom inner wall of the flat filter chamber 11 after the first step of impurity filtration along the bottom inner wall of the lifting filter chamber 12, so that the filter mud can achieve automatic separation and filtration of mud and liquid by the weight of the water and be discharged through the filter chamber outlet 13, thereby significantly improving the overall filtration efficiency.

[0086] The filtrate lifting support plate 37 includes a support plate body and a plurality of filtrate holes formed in the support plate body, which are used to lift the filter mud through the support plate body and further enhance the overall filtrate effect by means of the filtrate holes.

[0087] Please refer to Figures 6 to 8 The hydrated sludge conveying and filtering device further includes a spiral extrusion structure 4. The spiral extrusion structure 4 includes a spiral extrusion shell 41 and a motor-driven spiral blade 42 that is connected and mounted in the center of the spiral extrusion shell 41. A spiral extrusion channel 45 is formed between the motor-driven spiral blade 42 and the spiral extrusion shell 41. The blade spacing of the motor-driven spiral blade 42 gradually decreases, so that the spiral extrusion channel 45 gradually forms an extrusion effect.

[0088] The spiral extrusion channel 45 has a spiral extrusion inlet 43 at one end of the spiral extrusion housing 41, and a spiral extrusion outlet 44 at the other end of the spiral extrusion housing 41. The spiral extrusion inlet 43 is connected to the filter chamber outlet 13. The spiral blades 42 are driven by a motor to rotate and drive the mud after the filtrate is lifted, so that the mud is spirally extruded through the spiral extrusion channel 45, which further improves the mud-liquid separation effect.

[0089] It should be noted that the spiral extrusion housing 41 and the motor-driven spiral blades 42 are arranged vertically or obliquely to complete the lifting extrusion conveying and further enhance the overall filtration effect.

[0090] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A process for dry-wet separation of hydrated sludge based on municipal street sweeping soil, characterized in that, Includes the following steps: Material receiving and impurity removal processes in the silo; For mud that has completed the impurity removal process, a simultaneous dry-wet separation filtrate process is performed by unloading the mud. A filtrate lifting process is performed on the mud material that has completed the simultaneous dry and wet separation filtrate process; A spiral extrusion process is performed on the sludge material that has completed the filtrate lifting process; The material receiving and impurity removal process of the silo specifically includes: The street sweeping soil receiving bins are arranged in a sunken manner, with the top grid inlet of the receiving bins lower than the pre-drainage outlet of the sweeper, so that the sweeper can directly unload the sludge. The effective storage volume of the receiving silo is set to be no less than 4m³, and it has the functions of storing materials, coarse separation and dewatering. During the sludge unloading process, the top grid inlet of the receiving silo intercepts large impurities, and the intercepted large impurities are cleaned and transported away for treatment. The process of simultaneously separating the wet and dry filtrate from the mud after the impurity removal process specifically includes: The mud that has undergone the impurity removal process passes through a screen and enters the receiving hopper; The bottom plate and side plates of the receiving hopper are equipped with isolation screens with a diameter range of 0.5~3mm. The isolation screens of the receiving hopper directly assist in the first step of dry-wet separation filtrate during unloading. That is, the sewage in the mud is directly filtered and discharged through the screen during unloading, which significantly shortens the vehicle unloading time. Meanwhile, the isolation screen of the receiving hopper is equipped with a backwashing mechanism. The high-pressure water pump and control system of the backwashing mechanism clean the isolation screen regularly to ensure the normal operation of the equipment's separation function. The process of lifting the filtrate from the mud after the simultaneous dry-wet separation filtrate process has been completed specifically includes: The mud material that has completed the wet-dry separation filtrate process after being poured is further conveyed to the filter mud lifting structure. The filter mud lifting structure adopts a multi-key connection of a geared motor. The geared motor drives the chains on both sides inside the receiving hopper to move synchronously. At the same time, the scraper between the chains on both sides scrapes the mud material located on the isolation screen in the receiving hopper. Then, the mud material located on the isolation screen is lifted obliquely along the inclined surface of the output end of the receiving hopper by the action of the scraper. The scraper has several filtrate holes with an inner diameter range of 3~15mm. In this way, the mud material is lifted obliquely by gravity to complete the filtrate filtration.

2. The hydrated sludge dry-wet separation process based on municipal street sweeping soil according to claim 1, characterized in that, The spiral extrusion process for the sludge after the filtrate lifting process specifically includes: The mud material that has completed the filtrate lifting process is further conveyed to the spiral extrusion structure; The spiral extrusion structure has a built-in spiral extrusion channel formed by motor-driven spiral blades. The motor-driven spiral blades adopt a variable pitch and variable diameter design, which allows the spiral extrusion channel to continuously switch the channel volume and extrude the mud that has completed the filtrate lifting process again to further reduce the moisture content of the mud.

3. A sludge dry-wet separation device for performing the sludge dry-wet separation process as described in claim 2, characterized in that, The hydrated sludge dry-wet separation device includes: The basic structure for the transmission system includes a horizontally placed filter chamber and a lifting filter chamber that are connected to each other. A filter screen structure is correspondingly positioned at the top of the horizontal filter cavity. The filter mud lifting structure is drivably and sequentially arranged in the flat filter chamber and the lifting filter chamber, and the filter mud lifting structure is located below the filter screen structure.

4. The hydrated sludge dry-wet separation device based on municipal street sweeping soil according to claim 3, characterized in that, The horizontally positioned filter chamber extends horizontally as a receiving hopper. The lifting filter chamber is obliquely extended, and the bottom end of the lifting filter chamber is connected to one side end of the flat filter chamber.

5. The hydrated sludge dry-wet separation device based on municipal street sweeping soil according to claim 4, characterized in that, The filter screen structure includes a screen side baffle and a filter screen layer fixedly disposed on the inner side of the screen side baffle. The screen side baffle and the filter screen layer are both fixedly assembled at the top position of the flat filter cavity, and the filter screen layer is correspondingly connected to the interior of the flat filter cavity.

6. The hydrated sludge dry-wet separation device based on municipal street sweeping soil according to claim 3, characterized in that, The filter mud lifting structure includes a geared motor, a first transmission sprocket, a second transmission sprocket, and a second transmission chain; The first transmission sprocket is rotatably mounted inside the end of the flat filter chamber that is away from the lifting filter chamber, and the second transmission sprocket is rotatably mounted inside the end of the lifting filter chamber that is away from the flat filter chamber, and the first transmission sprocket and / or the second transmission sprocket are rotatably driven. The base of the geared motor is fixedly mounted on the outer wall of the lifting filter cavity, and a first transmission chain is installed between the rotational kinetic energy output end of the geared motor and the second transmission sprocket. The second transmission chain is mounted on the second transmission sprocket and the first transmission sprocket. Furthermore, the second transmission chain is intermittently connected with several filtrate lifting trays along its travel path; The filtrate lifting tray includes a tray body and a plurality of filtrate holes formed in the tray body.

7. The hydrated sludge dry-wet separation device based on municipal street sweeping soil according to claim 3, characterized in that, Also includes: The spiral extrusion structure includes a spiral extrusion shell and a motor-driven spiral blade that is interchangeably mounted at the center of the spiral extrusion shell. A spiral extrusion channel is formed between the motor-driven spiral blades and the spiral extrusion shell. The blade spacing of the motor-driven spiral blades gradually decreases, and the diameter of the motor-driven spiral blades and the diameter of the spiral extrusion shell also gradually decrease, so that the spiral extrusion channel gradually forms an extrusion effect. The spiral extrusion channel is connected to the output end of the filter mud lifting structure. The spiral extrusion shell and the motor-driven spiral blades are arranged vertically or obliquely.

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