Self-cleaning sewage heat exchange device
By integrating heat exchange components, cleaning components, and sludge discharge screws, the self-cleaning wastewater heat exchange device solves the problems of complex structure and difficult cleaning of existing devices, and achieves efficient and stable utilization of wastewater heat energy.
Patent Information
- Application Number
- CN202423200448.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Existing wastewater heat exchange devices are complex in structure and cumbersome in operation, making them difficult to promote. Furthermore, the heat exchange pipes are difficult to clean, and the accumulation of dirt is not easy to remove, which affects the heat exchange efficiency.
A self-cleaning wastewater heat exchange device was designed, which integrates heat exchange components, cleaning components and sludge discharge screws in the tank. The cleaning brush moves horizontally to clean the pipes, and the sludge discharge screws remove sediment, ensuring pipe cleanliness and efficient heat exchange.
It achieves a simple and compact structure, convenient installation, stable operation, improved heat exchange efficiency, prevents biofilm and scaling, ensures good heat exchange effect, and solves the problem of difficult cleaning.
Smart Images
Figure CN223580723U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present specification relates to the technical field of sewage treatment, and in particular to a self-cleaning sewage heat exchange device. BACKGROUND
[0002] There is a large amount of heat energy in the urban drainage network or tail water of a sewage treatment plant. If this excess heat energy can be extracted, it can be used for air conditioning and refrigeration or heating, for an air conditioning system, thereby saving a large amount of electric energy, which is a significant resource utilization and is of great significance for achieving low carbon emissions. At the same time, the extraction of heat energy from sewage tail water can also make the tail water temperature lower, which is beneficial to the environment. Therefore, sewage heat energy utilization is also directly beneficial to the environment.
[0003] At present, sewage heat exchange has not been widely used, and various conventional heat exchange equipment often has a complex structure and is cumbersome to operate, which is not conducive to popularization. CONTENT OF THE UTILITY MODEL
[0004] In view of the deficiencies of the prior art, an object of the present specification is to provide a self-cleaning sewage heat exchange device which is simple and compact in structure, stable in operation, easy to install, and convenient to apply and popularize.
[0005] To achieve the above-mentioned object, the embodiment of the present specification provides a self-cleaning sewage heat exchange device, comprising:
[0006] a box body, wherein a sewage inlet, a sewage outlet, a heat exchange inlet and a heat exchange outlet are arranged on the box body;
[0007] a heat exchange assembly fixedly arranged in the box body, wherein the heat exchange assembly is connected between the heat exchange inlet and the heat exchange outlet; the heat exchange assembly comprises a plurality of groups of heat exchange pipelines arranged at intervals in a first horizontal direction;
[0008] a cleaning assembly movably arranged in the box body, wherein the cleaning assembly comprises a plurality of cleaning brushes arranged at intervals in the first horizontal direction, the cleaning brushes are movable along a second horizontal direction, the first horizontal direction is perpendicular to the second horizontal direction, the cleaning brushes and the heat exchange pipelines are arranged adjacent to and in contact with each other, and in a vertical direction, the length of the cleaning brush is greater than or equal to the length of the heat exchange pipeline;
[0009] a sludge discharge screw arranged in the box body and located at the bottom of the box body, wherein the sewage inlet and the sewage outlet are respectively located at two ends of the sludge discharge screw.
[0010] As a preferred embodiment, the heat exchange inlet and the sewage inlet are arranged on the same side of the box body and are arranged close to the top of the box body.
[0011] As a preferred implementation, the heat exchange outlet and the sewage outlet are arranged on the same side of the box body, the heat exchange outlet is arranged close to the top of the box body, and the sewage outlet is arranged close to the bottom of the box body.
[0012] As a preferred implementation, the heat exchange assembly comprises a water inlet main pipe and a water outlet main pipe, both of which extend along the first horizontal direction; the water inlet main pipe is connected between the heat exchange water inlet and the plurality of heat exchange pipes, and the water outlet main pipe is connected between the heat exchange water outlet and the plurality of heat exchange pipes.
[0013] As a preferred implementation, the heat exchange pipe comprises:
[0014] a water inlet branch pipe extending in the vertical direction, the top end of the water inlet branch pipe being in communication with the water inlet main pipe; a plurality of first outlets are arranged at intervals in the vertical direction of the water inlet branch pipe;
[0015] a water outlet branch pipe extending in the vertical direction, the top end of the water outlet branch pipe being in communication with the water outlet main pipe; a plurality of first inlets are arranged at intervals in the vertical direction of the water outlet branch pipe; the number of the first inlets is equal to the number of the first outlets;
[0016] a plurality of heat exchange branch pipes distributed in the vertical direction, the heat exchange branch pipes being connected between the first outlets and the first inlets; the heat exchange branch pipes comprise a plurality of first branch pipes extending along the second horizontal direction and a plurality of second branch pipes connecting adjacent two first branch pipes.
[0017] As a preferred implementation, the first inlet and the first outlet correspond to each other, and the first inlet connected to the same heat exchange branch pipe is lower than the first outlet.
[0018] As a preferred implementation, a fixing frame for fixing the heat exchange branch pipes is fixedly arranged in the box body, the fixing frame extends in the vertical direction and is fixedly connected to both ends of the first branch pipe in the second horizontal direction.
[0019] As a preferred implementation, a first baffle is fixedly arranged between the sewage outlet and the heat exchange assembly in the box body, and the highest point of the first baffle is higher than the highest point of the heat exchange branch pipe.
[0020] As a preferred implementation form, the self-cleaning sewage heat exchange device further comprises two groups of driving assemblies symmetrically arranged on the inner wall of the box in the first horizontal direction; the driving assembly comprises a driving sprocket, a driven sprocket, a chain and a first motor, the first motor is connected with the driving sprocket, and the driving sprocket and the driven sprocket are arranged at intervals in the second horizontal direction; the chain is sleeved outside the driving sprocket and the driven sprocket; the lower half of the two chains is fixedly connected with a fixed plate, and the top ends of the plurality of cleaning brushes are fixedly connected to the fixed plate.
[0021] As a preferred implementation form, the end of the sludge discharging screw rod close to the sewage outlet is provided with an electric valve; and the end of the sludge discharging screw rod close to the sewage inlet is connected with a second motor. Advantageous effects
[0022] The self-cleaning sewage heat exchange device provided by the embodiment integrates the heat exchange assembly, the cleaning assembly and the sludge discharging screw rod in the box, and has simple and compact structure; is convenient to install, and can be directly placed at a position where sewage heat exchange is needed; is stable in operation, and is convenient to apply and popularize. Meanwhile, the heat exchange assembly comprises a plurality of groups of heat exchange pipelines arranged at intervals in the first horizontal direction, so that the heat exchange efficiency can be improved; the cleaning assembly is arranged, the cleaning brushes can move along the second horizontal direction, the heat exchange pipelines can be efficiently cleaned, the biological membrane or scale is prevented from growing on the contact surface of the heat exchange pipelines and the sewage, so that the heat exchange effect is affected, and the good heat exchange efficiency is ensured; the sludge discharging screw rod is arranged, the dirt cleaned by the cleaning assembly and the dirt precipitated in the sewage can be discharged, so that the self-cleaning sewage heat exchange device has complete functions, high heat exchange efficiency and scientific structure, and solves the problems of difficult cleaning of the pipelines of the common sewage heat exchange device and difficult removal of the dirt deposited in the heat exchanger.
[0023] Specific embodiments of the present application are described in detail in the following description and drawings, which show the principles of the present application can be adopted. It should be understood that the embodiments of the present application are not limited in scope as a result.
[0024] Features described and / or illustrated with respect to one embodiment can be used in the same or similar manner in one or more other embodiments, in combination with features in other embodiments, or in place of features in other embodiments.
[0025] It should be emphasized that the term "comprises / comprising" as used herein indicates the presence of the stated features, integers, steps or components, but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof. BRIEF DESCRIPTION OF DRAWINGS
[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0027] Figure 1 A structural schematic view of a self-cleaning sewage heat exchange device provided in the embodiment;
[0028] Figure 2 A structural schematic view of a heat exchange assembly provided in the embodiment;
[0029] Figure 3 A structural schematic view of a heat exchange pipeline and a cleaning brush provided in the embodiment;
[0030] Figure 4 A Figure 1 left view.
[0031] Explanation of reference signs:
[0032] 1, box; 11, sewage inlet; 12, sewage outlet; 13, heat exchange inlet; 14, heat exchange outlet;
[0033] 2, heat exchange assembly; 21, heat exchange pipeline; 211, water inlet branch pipe; 201, first outlet; 212, water outlet branch pipe; 202, first inlet; 213, heat exchange branch pipe; 203, first branch pipe; 204, second branch pipe; 22, water inlet main pipe; 23, water outlet main pipe;
[0034] 3, cleaning assembly; 31, cleaning brush;
[0035] 4, mud discharge screw; 41, electric valve; 42, second motor;
[0036] 5, fixing frame; 6, first baffle; 7, second baffle; 81, driving sprocket; 82, driven sprocket; 83, chain; 84, first motor; 9, fixed plate;
[0037] X, first horizontal direction; Y, second horizontal direction; Z, vertical direction. DETAILED DESCRIPTION
[0038] In order to make the technical field personnel better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should belong to the scope of protection of the present application.
[0039] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can be another element interposed. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be another element interposed. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.
[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0041] Please refer to Figures 1 to 4 The present application provides a self-cleaning sewage heat exchange device, comprising a box body 1, a heat exchange assembly 2, a cleaning assembly 3 and a sludge discharge screw 4 arranged in the box body 1.
[0042] Among them, such as Figure 1As shown, the box 1 is provided with a sewage inlet 11, a sewage outlet 12, a heat exchange inlet 13 and a heat exchange outlet 14. The heat exchange assembly 2 is fixedly arranged in the box 1. The heat exchange assembly 2 is connected between the heat exchange inlet 13 and the heat exchange outlet 14. The heat exchange assembly 2 includes a plurality of groups of heat exchange pipes 21 arranged at intervals in the first horizontal direction X. The heat exchange assembly 2 is used to exchange heat from sewage for subsequent use, and is connected to a rear-end sewage heat pump. The cleaning assembly 3 is movably arranged in the box 1. The cleaning assembly 3 includes a plurality of cleaning brushes 31 arranged at intervals in the first horizontal direction X. The cleaning brushes 31 can move along the second horizontal direction Y, and the first horizontal direction X is perpendicular to the second horizontal direction Y. The cleaning brushes 31 and the heat exchange pipes 21 are arranged adjacent to and in contact with each other. In the vertical direction Z, the length of the cleaning brush 31 is greater than or equal to the length of the heat exchange pipe 21. The mud discharging screw 4 is located at the bottom of the box 1. The sewage inlet 11 and the sewage outlet 12 are respectively located at both ends of the mud discharging screw 4.
[0043] The self-cleaning sewage heat exchange device provided by the embodiment integrates the heat exchange assembly 2, the cleaning assembly 3 and the mud discharging screw 4 in the box 1, has a simple and compact structure, is easy to install and can be directly placed at a position where sewage heat exchange is needed, and is stable in operation and easy to apply and popularize. Meanwhile, the heat exchange assembly 2 includes a plurality of groups of heat exchange pipes 21 arranged at intervals in the first horizontal direction X, which can improve the heat exchange efficiency. The cleaning assembly 3 is arranged, the cleaning brushes 31 can move along the second horizontal direction Y, the heat exchange pipes 21 can be efficiently cleaned, the biological membrane or scale growth on the contact surface between the heat exchange pipes 21 and the sewage can be prevented, and the heat exchange effect can be affected, so as to ensure good heat exchange efficiency. The mud discharging screw 4 is arranged, can discharge the dirt cleaned by the cleaning assembly 3 and the dirt precipitated in the sewage, and makes the self-cleaning sewage heat exchange device have complete functions, high heat exchange efficiency and a scientific structure, and solves the problems of difficult cleaning of the coil of the conventional sewage heat exchange device and difficult removal of the dirt deposited in the heat exchanger.
[0044] In the embodiment, the heat exchange inlet 13 and the sewage inlet 11 are arranged on the same side of the box 1 and close to the top of the box 1. The heat exchange outlet 14 and the sewage outlet 12 are arranged on the same side of the box 1. The heat exchange outlet 14 is arranged close to the top of the box 1, and the sewage outlet 12 is arranged close to the bottom of the box 1. The heat exchange inlet 13 and the heat exchange outlet 14 are arranged close to the top of the box 1, which can better perform heat exchange and increase the contact area between the heat exchange pipes 21 and the sewage in the box 1.
[0045] As shown in FIG. 1, the self-cleaning sewage heat exchange device includes a box 1, a heat exchange assembly 2, a cleaning assembly 3 and a mud discharging screw 4. Figure 2As shown, the heat exchange assembly 2 comprises a water inlet main pipe 22 and a water outlet main pipe 23. The water inlet main pipe 22 and the water outlet main pipe 23 both extend along the first horizontal direction X. The water inlet main pipe 22 is connected between the heat exchange water inlet 13 and the plurality of heat exchange pipes 21, and the water outlet main pipe 23 is connected between the heat exchange water outlet 14 and the plurality of heat exchange pipes 21. The water inlet main pipe 22 and the water outlet main pipe 23 can respectively communicate the heat exchange water inlet 13 and the heat exchange water outlet 14 with the plurality of heat exchange pipes 21.
[0046] Specifically, the heat exchange pipe 21 comprises a water inlet branch pipe 211 extending along the vertical direction Z, a water outlet branch pipe 212 extending along the vertical direction Z, and a plurality of heat exchange branch pipes 213 distributed along the vertical direction Z. The top end of the water inlet branch pipe 211 is in communication with the water inlet main pipe 22. The water inlet branch pipe 211 is spaced apart in the vertical direction Z and is provided with a plurality of first outlets 201. The top end of the water outlet branch pipe 212 is in communication with the water outlet main pipe 23. The water outlet branch pipe 212 is spaced apart in the vertical direction Z and is provided with a plurality of first inlets 202. The number of the first inlets 202 is equal to the number of the first outlets 201, and both are equal to the number of the heat exchange branch pipes 213. The heat exchange branch pipe 213 is connected between the first outlet 201 and the first inlet 202. The heat exchange branch pipe 213 comprises a plurality of first branch pipes 203 extending along the second horizontal direction Y and a plurality of second branch pipes 204 connecting adjacent two first branch pipes 203. The heat exchange pipe 21 thus arranged can better perform heat exchange and has a compact structure.
[0047] In an embodiment, the heat exchange assembly 2 provided by the present application can be directly installed into a channel in need of sewage heat exchange, so that the heat exchange assembly 2 performs heat exchange work, which is very convenient to install and has very high working efficiency.
[0048] As shown in Figure 2 , the first inlet 202 corresponds to the first outlet 201 one by one, and the first inlet 202 connected with the same heat exchange branch pipe 213 is lower than the first outlet 201, so that the liquid in the heat exchange branch pipe 213 flows from bottom to top. In Figure 2 , the number of heat exchange branch pipes 213 is set to 3. In other embodiments, the number of heat exchange branch pipes 213 can be set as needed.
[0049] As shown in Figure 1 , the box body 1 is fixedly provided with a fixing frame 5 for fixing the heat exchange branch pipe 213. The fixing frame 5 extends along the vertical direction Z and is fixedly connected with both ends of the first branch pipe 203 in the second horizontal direction Y, so as to fix the plurality of heat exchange branch pipes 213 in the vertical direction Z and ensure the stability of the structure.
[0050] In this embodiment, a first baffle 6 is fixedly installed inside the housing 1 between the sewage outlet 12 and the heat exchange assembly 2. The highest point of the first baffle 6 is higher than the highest point of the heat exchange branch pipe 213. The first baffle 6 can isolate the dirt cleaned from the heat exchange assembly 2, allowing it to settle downwards without clogging the sewage outlet 12. A second baffle 7 can be fixedly installed inside the housing 1 between the sewage inlet 11 and the heat exchange assembly 2 to prevent the sewage from impacting the heat exchange assembly 2.
[0051] Specifically, the self-cleaning wastewater heat exchanger further includes two sets of drive assemblies symmetrically arranged on the inner wall of the housing 1 in the first horizontal direction X, for driving the cleaning brushes 31 to move along the second horizontal direction Y. The drive assemblies include a drive sprocket 81, a driven sprocket 82, a chain 83, and a first motor 84. The first motor 84 is connected to the drive sprocket 81 and drives it to rotate. The drive sprocket 81 and the driven sprocket 82 are spaced apart in the second horizontal direction Y, and the chain 83 is sleeved around the drive sprocket 81 and the driven sprocket 82. Rotation of the drive sprocket 81 drives the chain 83 and the driven sprocket 82 to rotate. A fixing plate 9 is fixedly connected between the lower halves of the two chains 83, and the top ends of the plurality of cleaning brushes 31 are fixedly connected to the fixing plate 9. Figure 3 As shown, the fixing plate 9 extends along the first horizontal direction X. A cleaning brush 31 is provided between every two sets of heat exchange pipes 21, and the number of cleaning brushes 31 can be one less than the number of heat exchange pipes 21.
[0052] The housing 1 may be equipped with limiting members at both ends of the second horizontal direction Y to limit the movement of the cleaning brush 31, so that the cleaning brush 31 can move back and forth between the two limiting members to clean the heat exchange pipe 21.
[0053] like Figure 1 As shown, an electric valve 41 is provided at the end of the sludge discharge screw 4 near the sewage outlet 12, which can control the opening and closing of the outlet end of the sludge discharge screw 4. When the dirt at the outlet end of the sludge discharge screw 4 accumulates to a certain extent, the solenoid valve opens, discharging the dirt from the outlet end of the sludge discharge screw 4 through the sewage outlet 12, and then the solenoid valve closes. A second motor 42 is connected to the end of the sludge discharge screw 4 near the sewage inlet 11 to drive the sludge discharge screw 4 to rotate. Figure 4 As shown, the bottom of the box 1 is set in a V shape, which facilitates the collection of dirt, and the mud discharge screw 4 is set at the lowest point of the V-shaped structure.
[0054] The mobile cleaning brush 31 can clean the heat exchange pipeline 21 at any time, and the substances deposited on the bottom of the box 1 can be discharged through the sludge screw 4, and the sediment in the sewage in the box 1 is also cleaned by the sludge screw 4. In order to prevent corrosion, the box 1 is made of stainless steel and adopts pickling and passivation process.
[0055] It should be noted that in the description of the present specification, the terms "first", "second", etc. are only used for the purpose of description and distinguishing similar objects, and there is no sequence between them, nor can it be understood or implied as indicating or implying relative importance. In addition, in the description of the present specification, unless otherwise stated, the meaning of "a plurality of" is two or more.
[0056] Any numerical values cited in the present disclosure encompass all values from the lower value to the upper value in increments of one unit, and there is at least a two-unit interval between any lower value and any higher value. For example, if it is stated that the value of a component or process variable (such as temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, the purpose is to state that values such as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. are also explicitly listed in the specification. For values less than 1, it is appropriate to consider one unit as 0.0001, 0.001, 0.01, 0.1. These are just examples of what is intended to be explicitly stated, and all possible combinations of values listed between the lowest value and the highest value are considered to be explicitly stated in a similar manner in the specification.
[0057] Unless otherwise stated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used with a range applies to both ends of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the specified endpoints.
[0058] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "consisting essentially of should include the specified elements, ingredients, components or steps, and any other elements, ingredients, components or steps that do not materially affect the basic and novel characteristics of the combination. The use of the term "comprising" or "including" to describe combinations of elements, ingredients, components or steps herein is also intended to cover embodiments consisting essentially of the elements, ingredients, components or steps. Here, the use of the term "may" is intended to mean that any attribute described is optional.
[0059] Plural elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step might be divided into separate plural elements, components, parts, or steps. To the extent that the disclosure of elements, components, parts, or steps is expressed in terms of "containing," "comprising," "including," or "having," it should be understood that the elements, components, parts, or steps can also "consist essentially of or "consist of the recited elements, components, parts, or steps.
[0060] It is understood that the above description is intended to be illustrative and not restrictive. Many embodiments and many applications besides the examples provided herein will be apparent to those of skill in the art upon reading the above description. The scope of the teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated by reference for the purpose of the present disclosure. Any incorporation by reference of any article or reference which has not been available to the public through no fault of the present inventors or through no fault of anyone owning or controlling the article or reference is expressly discontinued, and the present disclosure is hereby relied upon independently.
Claims
1. A self-cleaning sewage heat exchanger, characterized in that, The utility model relates to a sewage treatment device, comprising: a box body provided with a sewage inlet, a sewage outlet, a heat exchange inlet and a heat exchange outlet; a heat exchange assembly fixedly arranged in the box body, connected between the heat exchange inlet and the heat exchange outlet, comprising a plurality of groups of heat exchange pipes arranged at intervals in a first horizontal direction; a cleaning assembly movably arranged in the box body, comprising a plurality of cleaning brushes arranged at intervals in the first horizontal direction, movable along a second horizontal direction, the first horizontal direction being perpendicular to the second horizontal direction, the cleaning brushes being arranged adjacent to and in contact with the heat exchange pipes, the length of the cleaning brushes being greater than or equal to the length of the heat exchange pipes in a vertical direction; a sludge discharge screw arranged in the box body and located at the bottom of the box body, the sewage inlet and the sewage outlet being located at two ends of the sludge discharge screw respectively.
2. The self-cleaning sewage heat exchanger according to claim 1, characterized in that, The heat exchange inlet and the sewage inlet are arranged on the same side of the box body and close to the top of the box body.
3. The self-cleaning sewage heat exchanger according to claim 1, characterized in that, The heat exchange outlet and the sewage outlet are arranged on the same side of the box body, the heat exchange outlet being arranged close to the top of the box body and the sewage outlet being arranged close to the bottom of the box body.
4. The self-cleaning sewage heat exchanger according to claim 1, characterized in that, The heat exchange assembly comprises a water inlet main pipe and a water outlet main pipe, both extending along the first horizontal direction, the water inlet main pipe being connected between the heat exchange inlet and the plurality of groups of heat exchange pipes, and the water outlet main pipe being connected between the heat exchange outlet and the plurality of groups of heat exchange pipes.
5. The self-cleaning sewage heat exchanger according to claim 4, characterized in that, The heat exchange pipe comprises: a water inlet branch pipe extending in a vertical direction, the top end of the water inlet branch pipe being in communication with the water inlet main pipe, a plurality of first outlets being arranged at intervals in the vertical direction on the water inlet branch pipe; a water outlet branch pipe extending in a vertical direction, the top end of the water outlet branch pipe being in communication with the water outlet main pipe, a plurality of first inlets being arranged at intervals in the vertical direction on the water outlet branch pipe, the number of the first inlets being equal to the number of the first outlets; a plurality of heat exchange branch pipes distributed in a vertical direction, connected between the first outlets and the first inlets, the heat exchange branch pipes comprising a plurality of first branch pipes extending along the second horizontal direction and a plurality of second branch pipes connecting adjacent two first branch pipes.
6. The self-cleaning sewage heat exchanger according to claim 5, characterized in that, The first inlets and the first outlets correspond to each other, and the first inlets connected to the same heat exchange branch pipe are lower than the first outlets.
7. The self-cleaning sewage heat exchanger according to claim 5, characterized in that, A fixing frame for fixing the heat exchange branch pipes is fixedly arranged in the box body, extending in a vertical direction and fixedly connected to both ends of the first branch pipes in the second horizontal direction.
8. The self-cleaning sewage heat exchanger according to claim 5, characterized in that, A first baffle is fixedly arranged between the sewage outlet and the heat exchange assembly in the box body, the highest point of the first baffle being higher than the highest point of the heat exchange branch pipes.
9. The self-cleaning sewage heat exchanger according to claim 1, characterized in that, The self-cleaning sewage heat exchange device further comprises two groups of driving assemblies symmetrically arranged on the inner wall of the box in the first horizontal direction; the driving assembly comprises a driving sprocket, a driven sprocket, a chain and a first motor, the first motor is connected with the driving sprocket, and the driving sprocket and the driven sprocket are arranged at intervals in the second horizontal direction; the chain is sleeved outside the driving sprocket and the driven sprocket; the lower half portions of the two chains are fixedly connected with a fixed plate, and the top ends of the plurality of cleaning brushes are fixedly connected with the fixed plate.
10. The self-cleaning sewage heat exchanger according to claim 1, characterized in that, The end of the mud discharging screw rod close to the sewage water outlet is provided with an electric valve; and the end of the mud discharging screw rod close to the sewage water inlet is connected with a second motor.