A wastewater pretreatment device for a wastewater supply source heat pump in a wastewater treatment plant

Abstract

This invention discloses a wastewater pretreatment device for a water source heat pump in a wastewater treatment plant, comprising a filter tank, and further comprising: a water inlet disposed at the upper end of the filter tank; and a filter unit disposed within the filter tank. The filter unit comprises: a filter plate disposed at an incline within the filter tank via a filter frame; a scraping assembly disposed on the filter plate; and a cleaning assembly disposed directly below the inclined end of the filter plate. By setting the filter unit within the filter tank, wastewater can be pretreated before entering the water source heat pump unit, thereby eliminating the damage caused by impurities in the water to the water source heat pump unit. Furthermore, the scraping and cleaning assemblies within the filter unit allow impurities to be directly discharged from the pretreatment device after wastewater filtration. The cleaning assembly also compresses the impurities, facilitating their discharge and subsequent treatment, thus saving time in the later stages of impurity treatment and dehydration.

Description

Technical Field

[0001] This invention relates to the field of wastewater source heat pump technology, specifically to a wastewater pretreatment device for a wastewater treatment plant water supply source heat pump. Background Technology

[0002] Wastewater source heat pumps utilize raw wastewater as a heat source to raise the temperature of water and facilitate the use of air conditioning systems through heat exchange. Due to the large water flow and convenient water intake of wastewater treatment plants, this technology has significant advantages when applied to wastewater treatment plants.

[0003] However, when the wastewater treated in the primary stage of the sewage treatment plant is recycled water, some impurities will still be present when it is directly transported to the water source heat pump. These impurities may be introduced into other equipment of the water source heat pump, which can easily damage the water source heat pump unit and increase the later maintenance costs. Therefore, a pretreatment device can be installed before the water source heat pump to filter the recycled water after primary treatment again to achieve the effect of removing impurities. At the same time, this impurity removal should also have the advantage of a later impurity discharge device.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a wastewater pretreatment device for a water source heat pump in a wastewater treatment plant, in order to solve the problems mentioned in the background art, where impurities are introduced into other equipment of the water source heat pump, which can easily damage the water source heat pump unit, and impurities are difficult to be discharged from the pretreatment device.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wastewater pretreatment device for a wastewater treatment plant's water supply source heat pump, comprising a filter tank, and further comprising:

[0007] The water inlet is located at the top of the water filter tank and is used to introduce water into the water filter tank.

[0008] The water filtration unit, located inside the water filtration tank, is used to filter the wastewater entering from the inlet section.

[0009] The water outlet is located at the bottom of the water filter tank;

[0010] The water filtration unit includes:

[0011] A filter plate is inclinedly installed in a filter box via a filter frame, and the inclined upper end of the filter plate is connected to the water inlet.

[0012] A scraping assembly, mounted on the filter plate, is used to remove impurities from the surface of the filter plate.

[0013] The cleaning component is located directly below the inclined end of the filter plate. It is used to collect the impurities removed by the scraping component and discharge them into the filter tank.

[0014] Preferably, the scraping assembly includes:

[0015] Multiple scrapers are arranged in a rectangular ring on the filter plate, and the scraping ends of the multiple scrapers are attached to the upper surface of the filter plate.

[0016] The power unit, located at the filter plate, drives multiple scrapers to rotate in a circular cycle when water enters the inlet section.

[0017] Preferably, the power unit includes:

[0018] Two sets of chains are symmetrically arranged on both sides of the filter frame, and multiple scrapers are evenly fixed between the two sets of chains and are arranged at a perpendicular angle to the filter plate.

[0019] Multiple sets of shafted gears are coaxially meshed with two sets of chains to achieve synchronous chain rotation;

[0020] The water inlet section is configured as a water inlet pipe and a water inlet nozzle. The water inlet nozzle is flat and its nozzle is aligned vertically with the scraper to discharge water.

[0021] Preferably, the cleaning component includes:

[0022] The cleaning chamber is located on one side of the water filter tank and directly below the inclined end of the water filter plate. It is used to collect the impurities that fall down. An impurity outlet is provided on the outer wall of the water filter tank at the location of the cleaning chamber. The cleaning chamber is rotatably set at the location of the impurity outlet.

[0023] The extrusion section is slidably mounted on the cleaning chamber. After a certain amount of impurities are loaded into the cleaning chamber, the extrusion section starts to work to initially extrude water from the impurities. During the extrusion process, the impurities are shoveled onto the extrusion section. After the water is extruded, the extrusion section moves out of the cleaning chamber to the outside of the impurity outlet and then discharges the impurities on it.

[0024] Preferably, the extrusion section includes:

[0025] A squeezing shovel is slidably mounted on a cleaning chamber, which is provided with a slide rail for the squeezing shovel to slide on, and rectangular sliders on both sides of the squeezing shovel that cooperate with the slide rail.

[0026] An electric telescopic rod is hinged at one end to a pressing shovel plate, and at the other end is connected to the outer wall of the water filter tank via a connecting plate. The electric telescopic rod is rotatably mounted on the connecting plate.

[0027] Adjustment components are located on both sides of the extrusion shovel plate and are used to adjust the movement state of the cleaning chamber during the extrusion process so that impurities can be better retained on the extrusion shovel plate after compression and then move out from the impurity outlet.

[0028] The ejector, located on one side of the cleaning chamber, is used to push the extruded impurities out of the extrusion shovel so that they can be removed from the extrusion section.

[0029] Preferably, the adjusting member includes:

[0030] A sliding plate is telescopically mounted on the upper end of an extrusion shovel, and rectangular sliding strips are provided on both sides of the sliding plate;

[0031] An adjusting plate is fixed to the inner wall of the water filter tank. The adjusting plate is provided with an adjusting groove for limiting the sliding of a rectangular slide bar. The adjusting groove includes an arc-shaped part and a straight part. A limiting part is provided at the upper end connection of the arc-shaped part and the straight part for unidirectional limiting of the rectangular slide bar.

[0032] Preferably, the limiting portion includes:

[0033] A limiting top block is slidably disposed at the connection between the arc-shaped part and the straight part. The limiting top block is elastically set at this location, and the end of the limiting top block near the arc-shaped part is set with an arc-shaped surface.

[0034] An elastic arc block, located at the end of the straight section, is used to squeeze the right end of the rectangular slider that enters the straight section, so that the rectangular slider will not flip when it returns into the straight section.

[0035] Preferably, the ejector includes:

[0036] A connecting plate is fixedly connected to a cleaning chamber on one side. The connecting plate is hollowed out, and a push plate is provided in the hollowed-out part. An extension rail connected to the slide rail is provided on the connecting plate and the push plate to squeeze the shovel plate to continue sliding.

[0037] The cylinder is connected to the push plate at one end and fixed to the outer wall of the cleaning chamber at the other end by a fixing plate.

[0038] When the electric telescopic mechanism drags the extrusion shovel to the end of the extension rail, the cylinder starts working, which can push the extruded impurities on the extrusion shovel from the other side of the extrusion shovel.

[0039] Preferably, the water filtration unit is further provided with a rinsing section, which is used to rinse the impurities remaining on the water filtration plate after the scraper removes the filter plate, thereby preventing small impurities from clogging the filter holes of the water filtration plate.

[0040] Preferably, the rinsing section includes:

[0041] A flipping component, installed on the filter frame, is used to drive the filter frame to flip.

[0042] The rinsing component is located directly above the filter frame and is used to rinse the filter plate from the other side after the filter frame is flipped over.

[0043] The receiving plate, located directly below the filter frame, receives the rinsing liquid and guides it into the cleaning chamber.

[0044] Compared with the prior art, the beneficial effects of the present invention are:

[0045] I. This invention, by setting a water filtration unit in the water filter tank, can perform pre-treatment filtration of sewage before it enters the water source heat pump unit, thereby eliminating the damage caused by impurities in the water to the water source heat pump unit. In addition, by setting scraping and cleaning components in the water filtration unit, impurities can be directly discharged from the pre-treatment device after the sewage source is filtered. At the same time, the cleaning components can squeeze the impurities, which facilitates the discharge of impurities and also facilitates the subsequent treatment of impurities, thus saving the time of subsequent impurity treatment and dehydration.

[0046] Second, by setting up a scraping component, the present invention can use the water flow in the water inlet as the energy for the cyclical motion of the scraper. With the action of the scraper, a series of filtration spaces can be formed on the filter plate. During the filtration process, impurities are scraped off to the inclined side of the filter plate and into the cleaning component. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0048] Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle;

[0049] Figure 3 This is a front sectional view of the interior of the water filter tank of the present invention;

[0050] Figure 4 This is an overall structural diagram of the filter plate of the present invention;

[0051] Figure 5 This is a cross-sectional view of the filter plate from another angle according to the present invention;

[0052] Figure 6 This is a structural diagram of the cleaning component of the present invention;

[0053] Figure 7 This is a side sectional view of the cleaned structure of the present invention;

[0054] Figure 8 for Figure 2 Enlarged view of point A in the middle;

[0055] Figure 9 for Figure 5 Enlarged view at point B in the middle;

[0056] Figure 10 for Figure 7 Enlarged view of point C in the middle.

[0057] Reference numerals: 1-Filter tank; 2-Inlet; 21-Inlet pipe; 22-Inlet nozzle; 3-Filter unit; 31-Filter plate; 32-Filter frame; 33-Scraper assembly; 331-Scraper; 332-Power unit; 3321-Chain; 3322-Gear with shaft; 34-Cleaning assembly; 341-Cleaning chamber; 342-Extrusion section; 3421-Extrusion shovel; 3422-Electric telescopic rod; 3423-Slide rail; 3424-Rectangular slider; 3425-Adjusting component; 34251-Slide plate; 34252-Rectangular slide bar; 342 53-Adjusting plate; 34254-Adjusting slide; 34255-Arc-shaped part; 34256-Straight part; 34257-Limiting part; 34258-Limiting top block; 34259-Elastic arc block; 3426-Push-out part; 34261-Connecting plate; 34262-Push plate; 34263-Extension rail; 34264-Cylinder; 35-Flushing part; 351-Tilting part; 352-Flushing part; 353-Receiving plate; 354-Rotating ring; 355-Rotating motor; 356-Water spray nozzle; 357-Telescopic power; 4-Water outlet. Detailed Implementation

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0059] Please see Figure 1-10 The present invention provides a technical solution: a wastewater pretreatment device for a wastewater treatment plant water supply source heat pump, comprising a filter tank 1, and further comprising:

[0060] Water inlet 2 is located at the upper end of water filter tank 1 and is used to introduce water into water filter tank 1.

[0061] The water filtration unit 3 is installed inside the water filtration tank 1 and is used to filter the sewage entering from the water inlet 2.

[0062] Water outlet 4 is located at the bottom of water filter tank 1;

[0063] The water filtration unit 3 includes:

[0064] The filter plate 31 is inclinedly installed in the filter box 1 through the filter frame 32, and the inclined upper end of the filter plate 31 is connected to the water inlet 2.

[0065] The scraping component 33 is disposed on the filter plate 31 and is used to remove impurities from the surface of the filter plate 31.

[0066] The cleaning component 34 is located directly below the lower inclined end of the filter plate 31 and is used to collect the impurities removed by the scraping component 33 and discharge them into the filter tank 1.

[0067] The scraping component 33 includes:

[0068] Multiple scrapers 331 are arranged in a rectangular ring on the filter plate 31, and the scraping ends of the multiple scrapers 331 are attached to the upper surface of the filter plate 31.

[0069] The power unit 332 is located at the filter plate 31 and is used to drive multiple scrapers 331 to rotate in a circular cycle when water enters the water inlet section 2.

[0070] Additionally, the power unit 332 includes:

[0071] Two sets of chains 3321 are symmetrically arranged on both sides of the filter frame 32, and multiple scrapers 331 are evenly fixed between the two sets of chains 3321 and are arranged at a perpendicular angle to the filter plate 31.

[0072] Multiple sets of shafted gears 3322 are coaxially meshed with two sets of chains 3321 to achieve synchronous rotation of chains 3321;

[0073] The water inlet 2 is configured as a water inlet pipe 21 and a water inlet nozzle 22. The water inlet nozzle 22 is flat and its nozzle is aligned with the scraper 331 in the vertical direction to output water.

[0074] During operation, water is introduced into the inlet section 2, and the wastewater is sprayed out from the inlet nozzle 22. To ensure a certain speed when the wastewater is sprayed out, the wastewater can be pressurized in the inlet pipe 21. The sprayed wastewater will then impact the scraper 331, causing the scraper 331 to move and thus driving the chain 3321 to rotate. During the rotation of the scraper 331, the wastewater will flow downwards on the filter plate 31, thus filtering the wastewater as it flows downwards. The filtered wastewater will drip down to the bottom of the filter tank 1 and be discharged from the outlet 4 into the water source heat pump by a pump. In addition, during the movement of the scraper 331, the impurities filtered on the filter plate 31 will be scraped off towards the downward side of the filter plate 31, causing the impurities to fall from the lower end of the filter plate 31 onto the cleaning assembly 34. When the power of the inlet section 2 is insufficient, a rotating motor 355 can be installed on the shaft gear 3322, which can also be used as the power source for the rotation of the chain 3321.

[0075] Meanwhile, the cleaning component 34 includes:

[0076] The cleaning chamber 341 is located inside the water filter box 1 on one side and directly below the inclined end of the filter plate 31. It is used to receive the impurities that fall down. The outer wall of the water filter box 1 at the location of the cleaning chamber 341 is provided with an impurity outlet 11. The cleaning chamber 341 is rotatably set at the location of the impurity outlet 11 via a rotating shaft.

[0077] The extrusion section 342 is slidably disposed on the cleaning chamber 341. After a certain amount of impurities are loaded into the cleaning chamber 341, the extrusion section 342 starts to work to initially extrude water from the impurities. During the extrusion process, the impurities are shoveled onto the extrusion section 342. After the water is extruded, the extrusion section 342 moves to the outside of the cleaning chamber 341 to the outside of the impurity outlet 11 and then discharges the impurities on it.

[0078] Additionally, the extrusion section 342 includes:

[0079] The extrusion shovel 3421 is slidably mounted on the cleaning chamber 341. The cleaning chamber 341 is provided with a slide rail 3423 for sliding the extrusion shovel 3421. Rectangular sliders 3424 on both sides of the extrusion shovel 3421 are used in conjunction with the slide rail 3423.

[0080] The electric telescopic rod 3422 is hinged at one end to the extrusion shovel plate 3421, and the other end is connected to the outer wall of the water filter box 1 through the connecting plate 34261. The electric telescopic rod 3422 is rotatably mounted on the connecting plate.

[0081] Adjustment component 3425 is provided on both sides of extrusion shovel plate 3421 and is used to adjust the movement state of cleaning chamber 341 during extrusion so that impurities can be better retained on extrusion shovel plate 3421 after compression and then move out from impurity outlet 11.

[0082] The ejector 3426 is disposed on one side of the cleaning chamber 341 and is used to eject the extruded impurities from the extrusion shovel 3421 so as to detach them from the extrusion section 342.

[0083] The adjusting member 3425 includes:

[0084] The sliding plate 34251 is telescopically slidably mounted on the upper end of the extrusion shovel 3421, and rectangular sliding strips 34252 are provided on both sides of the sliding plate 34251.

[0085] An adjusting plate 34253 is fixed to the inner wall of the filter tank 1. The adjusting plate 34253 is provided with an adjusting groove 34254 for limiting the sliding of a rectangular slide bar 34252. The adjusting groove 34254 includes an arc-shaped portion 34255 and a straight portion 34256. A limiting portion 34257 is provided at the upper connection of the arc-shaped portion 34255 and the straight portion 34256 for unidirectional limiting of the rectangular slide bar 34252. When the electric telescopic rod 3422 drives the pressing shovel plate 3421 to... When the cleaning chamber 341 moves inside, the arc-shaped part 34255 of the adjusting slide 34254 will drive the extrusion shovel 3421 to rotate upward, thereby causing the cleaning chamber 341 to tilt upward and rotate. Then, during the return stroke, the rectangular slide bar 34252 will return along the straight part 34256 due to the action of the limiting part 34257, so that the cleaning chamber 341 is always in a downward tilted state after extrusion and dehydration, thus allowing impurities to be better retained on the extrusion shovel 3421.

[0086] The limiting part 34257 includes:

[0087] A limiting top block 34258 is slidably disposed at the connection between the arc-shaped portion 34255 and the straight portion 34256. The limiting top block 34258 is elastically disposed at this location. The end of the limiting top block 34258 near the arc-shaped portion 34255 is set with an arc-shaped surface to facilitate compression and sliding with the arc-shaped slider, thereby passing through the limiting portion 34257. The connecting surface between the limiting top block 34258 and the straight portion 34256 is parallel and horizontally disposed to limit the top block 34258 from entering the straight portion 34256.

[0088] The elastic arc block 34259, located at the end of the straight section 34256, is used to squeeze the right end of the rectangular slider 34252 that enters the straight section 34256, so that the rectangular slider 34252 will not flip when it returns into the straight section 34256, thus making it smoother when the bottom surface of the rectangular slider 34252 enters the straight section 34256 from the arc section 34255 and the angle changes.

[0089] Meanwhile, the ejector 3426 includes:

[0090] The connecting plate 34261 is fixedly connected to the cleaning chamber 341 on one side. The connecting plate 34261 is hollowed out, and a push plate 34262 is provided in the hollowed-out part. An extension rail 34263 communicating with the slide rail 3423 is provided on the connecting plate 34261 and the push plate 34262 for squeezing the shovel plate 3421 to continue sliding.

[0091] Cylinder 34264 is connected to push plate 34262 at one end and fixed to the outer wall of cleaning chamber 341 by fixing plate at the other end.

[0092] When the electric telescopic device drags the extrusion shovel 3421 to the end of the extension rail 34263, the cylinder 34264 starts to work, which can push the extruded impurities on the extrusion shovel 3421 out from the other side of the extrusion shovel 3421. At this time, the device or container set at its lower end can be used to load and transfer the impurities.

[0093] In addition, the water filtration unit 3 is also provided with a rinsing section 35, which is used to rinse the impurities remaining on the water filtration plate 31 after the scraper 331 scrapes the water filtration plate 31, thereby preventing small impurities from clogging the filter holes of the water filtration plate 31.

[0094] Finally, the rinsing section 35 includes:

[0095] The flipping component 351 is set on the water filter frame 32 and is used to drive the water filter frame 32 to flip 180 degrees.

[0096] The rinsing component 352 is located directly above the filter frame 32 and is used to rinse the filter plate 31 from the other side after the filter frame 32 is rotated 180 degrees.

[0097] The receiving plate 353 is located directly below the filter frame 32 to receive the rinsing liquid and guide the rinsing liquid into the cleaning chamber 341;

[0098] The flipping component 351 is set as a rotating ring 354, which is fixed on the water filter box 1. The outer wall of the water filter frame 32 is set as a semi-arc shape that matches the rotation direction, and can rotate within the rotating ring 354. The other end of the water filter frame 32 is provided with a rotating motor 355 that drives the water filter frame 32 to rotate, so as to realize the rotation of the water filter frame 32.

[0099] In addition, the flushing component 352 is configured with multiple sets of flushing nozzles 356, which are evenly installed on the mounting plate. The mounting plate is installed on the water filter box 1 through the connecting plate 34261. A telescopic force 357 is provided between the mounting plate and the connecting plate 34261. The telescopic force 357 can be a cylinder or an electric telescopic rod. Through this telescopic setting, interference between the flushing component 352 and the flipping component 351 when it drives the water filter frame 32 to rotate can be avoided.

[0100] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0101] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sewage pretreatment device for a sewage plant water source heat pump, comprising a water filter tank (1), characterized in that, Also include: Water inlet (2) is arranged on the upper end of the filter tank (1), for water inlet into the filter tank (1); Filter unit (3) is arranged in the filter tank (1), for sewage entering the water inlet (2) filtering treatment; Water outlet (4) is arranged at the bottom of the filter tank (1); Wherein, the filter unit (3) comprises: Filter plate (31) is arranged in the filter tank (1) by filter frame (32) inclined, the inclined upper end of the filter plate (31) and water inlet (2) are connected; Scraping assembly (33) is arranged on the filter plate (31), for removing impurities on the surface of the filter plate (31); Cleaning assembly (34) is arranged below the filter plate (31) on the lower inclined side of the end, for collecting and discharging the impurities removed by the scraping assembly (33) from the filter tank (1); The cleaning assembly (34) comprises: Cleaning bin (341) is arranged on one side of the filter tank (1), and is located below the inclined side of the filter plate (31), for receiving the falling impurities, the outer wall of the filter tank (1) is provided with an impurity outlet (11) at the position of the cleaning bin (341), and the cleaning bin (341) is rotatably arranged at the position of the impurity outlet (11); The extrusion part (342) is slidably arranged on the cleaning bin (341), and after a certain amount of impurities is loaded in the cleaning bin (341), the extrusion part (342) starts to work to preliminarily extrude and remove water from the impurities, and in the extrusion process, the impurities are shovelled to the extrusion part (342), and after the extrusion and removal of water, the extrusion part (342) moves to the outside of the cleaning bin (341) to the outside of the impurity outlet (11), and then discharges the impurities thereon; The extrusion part (342) comprises: Extrusion shovel plate (3421) is slidably arranged on the cleaning bin (341), the cleaning bin (341) is provided with a sliding rail (3423) for sliding of the extrusion shovel plate (3421), and the extrusion shovel plate (3421) is provided with a rectangular sliding block (3424) on both sides matched with the sliding rail (3423); Electric telescopic rod (3422) is hingedly connected with the extrusion shovel plate (3421) at one end and connected with the outer wall of the filter tank (1) through the connecting plate (34261) at the other end; Adjusting part (3425) is arranged on both sides of the extrusion shovel plate (3421), for adjusting the movement state of the cleaning bin (341) in the extrusion process, so that the impurities can be better left on the extrusion shovel plate (3421) after compression, and then moved out of the impurity outlet (11); Pushing part (3426) is arranged on one side of the cleaning bin (341), for pushing the extruded impurities out of the extrusion shovel plate (3421) to separate from the extrusion part (342); The adjusting part (3425) comprises: Slide plate (34251) is arranged on the upper end of the extrusion shovel plate (3421) in telescopic sliding mode, and the slide plate (34251) is provided with a rectangular sliding strip (34252) on both sides; The adjusting plate (34253) is fixed to the inner wall of the water filtering tank (1), and a rectangular sliding bar (34252) limiting sliding adjusting sliding groove (34254) is arranged on the adjusting plate (34253), the adjusting sliding groove (34254) comprises an arc-shaped part (34255) and a straight part (34256), a limiting part (34257) is arranged at the upper end connecting part of the arc-shaped part (34255) and the straight part (34256), and the limiting part (34257) is used for one-way limiting of the rectangular sliding bar (34252).

2. The sewage pretreatment device for a sewage source heat pump of a sewage plant according to claim 1, characterized in that, The scraping assembly (33) comprises: A plurality of scraping plates (331) are arranged in a ring-shaped rectangular manner on the water filtering plate (31), and scraping ends of the plurality of scraping plates (331) are arranged in abutment with the upper surface of the water filtering plate (31); A power part (332) is arranged at the water filtering plate (31) and is used for driving the plurality of scraping plates (331) to rotate periodically in a ring shape when water is fed into the water inlet part (2).

3. The sewage pretreatment device for a sewage source heat pump of a sewage plant according to claim 2, characterized in that, The power part (332) comprises: Two groups of chains (3321) are symmetrically arranged on both sides of the water filtering frame (32), the plurality of scraping plates (331) are uniformly and fixedly arranged between the two groups of chains (3321), and the plurality of scraping plates (331) are arranged at a perpendicular angle with the water filtering plate (31); A plurality of shaft gears (3322) are coaxially and meshingly connected with the two groups of chains (3321) to realize synchronous rotation of the chains (3321); The water inlet part (2) is provided with a water inlet pipe (21) and a water inlet nozzle (22), the water inlet nozzle (22) is provided in a flat type, and the nozzle is aligned with the scraping plate (331) in the vertical direction.

4. The sewage pre-treatment device for a sewage source heat pump of a sewage plant according to claim 1, characterized in that, The limiting part (34257) comprises: A limiting top block (34258) is slidingly arranged at the connecting part of the arc-shaped part (34255) and the straight part (34256), the limiting top block (34258) is elastically arranged at the connecting part by elasticity, and the side end of the limiting top block (34258) close to the arc-shaped part (34255) is provided in an arc-shaped surface; An elastic arc block (34259) is arranged at the end of the straight part (34256) and is used for extruding the right end of the rectangular sliding bar (34252) entering the straight part (34256), so that the rectangular sliding bar (34252) does not overturn when returning to the straight part (34256).

5. The sewage pre-treatment device for a sewage source heat pump of a sewage plant according to claim 1, characterized in that, The pushing-out piece (3426) comprises: A connecting plate (34261) is fixedly connected with one side of the cleaning bin (341), the connecting plate (34261) is provided in a hollow manner, a pushing plate (34262) is arranged at the hollow part of the connecting plate (34261), and the connecting plate (34261) and the pushing plate (34262) are provided with an extension rail (34263) in communication with the sliding rail (3423) and are used for extruding the scraping plate (3421) to continue sliding; A gas cylinder (34264) is connected with the pushing plate (34262) at one end and is fixed to the outer wall of the cleaning bin (341) by a fixing plate at the other end; When the electric telescopic extrusion scraping plate (3421) is dragged to the end of the extension rail (34263), the gas cylinder (34264) starts to work and pushes out the extruded impurities on the extrusion scraping plate (3421) from the other side of the extrusion scraping plate (3421).

6. The sewage pre-treatment device for a sewage source heat pump of a sewage plant according to claim 2, characterized in that, The water filtering unit (3) is also provided with a flushing part (35) for flushing the impurities remaining on the water filtering plate (31) after the scraper (331) scrapes the water filtering plate (31), so as to prevent the small impurities from blocking the filter holes of the water filtering plate (31).

7. The sewage pre-treatment device for a sewage source heat pump of a sewage plant according to claim 6, characterized in that, The flushing part (35) comprises: a turnover part (351) arranged on the water filtering frame (32) and used for driving the water filtering frame (32) to turn over by 180 degrees; a flushing part (352) arranged directly above the water filtering frame (32) and used for flushing the water filtering plate (31) from the other side of the water filtering plate (31) after the water filtering frame (32) is turned over by 180 degrees; and a receiving plate (353) arranged directly below the water filtering frame (32) and used for receiving the flushing liquid and guiding the flushing liquid into the cleaning bin (341).

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