Production return water waste heat recovery device

Abstract

The utility model belongs to the technical field of waste heat recovery, and particularly relates to a production return water waste heat recovery device which comprises a boiler, a filtering mechanism is arranged on the side edge of the boiler, and a smoke exhaust pipe is arranged between the filtering mechanism and the boiler in a communicated mode. The waste heat recovery structure is arranged above the filtering mechanism and communicates with the filtering mechanism; and the water return pipe is arranged between the waste heat recovery structure and the boiler in a communicating manner. And the effects of conveniently filtering the flue gas and improving the waste heat recovery efficiency are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat recovery, and in particular relates to a production return water waste heat recovery device. Background Art

[0002] In industrial production, various types of equipment emerge in an endless stream. Various metallurgical furnaces, boilers, incinerators and other commonly used equipment occupy an important position in industrial production. When the furnace is in operation, a large amount of high-temperature flue gas is usually generated. With the increasing attention paid to energy consumption issues, how to treat flue gas has gradually become a new topic. At present, in the treatment of flue gas, in order to respond to carbon reduction and consumption reduction, flue gas waste heat recovery equipment is often used for treatment. The large amount of waste heat in the flue gas is recycled and utilized, which is of great significance to energy saving and consumption reduction and energy recycling.

[0003] Chinese utility model patent CN217004435U discloses a waste heat recovery device for a steam boiler, comprising a steam boiler; the inner cavity of the steam boiler is respectively provided with a furnace and a steam generating chamber, the furnace is connected to a burner; the furnace is provided with a smoke exhaust pipe; it also includes a waste heat recovery mechanism; the waste heat recovery mechanism includes a waste heat recovery box, a return pipe, and a spray head; the smoke exhaust pipe extends upward to the inner cavity that passes through the waste heat recovery box and the extended end exceeds the waste heat recovery box; a spray head is provided at the top of the inner cavity of the waste heat recovery box, the bottom of the waste heat recovery box is connected to the steam generating chamber through a return pipe, and an exhaust pipe is provided on the waste heat recovery box.

[0004] However, the device directly inputs the flue gas into the waste heat recovery mechanism through the smoke exhaust pipe, and the dust contained in the flue gas will adhere to the surface of the smoke baffle and the smoke exhaust pipe, affecting the efficiency of waste heat recovery. Utility Model Content

[0005] The purpose of the utility model is to provide a production return water waste heat recovery device in response to the above-mentioned technical problems, so as to facilitate the filtration of flue gas and improve the waste heat recovery efficiency.

[0006] In view of this, the utility model provides a production return water waste heat recovery device, which is characterized by comprising:

[0007] A boiler, wherein a filtering mechanism is arranged on the side of the boiler, and a smoke exhaust pipe is arranged in communication between the filtering mechanism and the boiler;

[0008] A waste heat recovery structure, wherein the waste heat recovery structure is arranged above the filter mechanism and is connected to the filter mechanism;

[0009] A water return pipe is arranged between the waste heat recovery structure and the boiler.

[0010] In the present technical solution, the flue gas generated by combustion in the boiler is discharged to the filtering mechanism through the exhaust pipe. The filtering mechanism can filter the dust in the flue gas to prevent the dust from adhering to the waste heat recovery structure and affecting the efficiency of waste heat recovery. Through the set return pipe, the hot water after waste heat recovery can be returned to the boiler for reuse, which is beneficial to improving the utilization rate of energy.

[0011] In the above technical solution, further, the filtering mechanism includes:

[0012] A box body, wherein a support frame is arranged below the box body, and openings are symmetrically arranged on the side walls of the box body;

[0013] A slot, which is arranged inside the box body and matches with the opening;

[0014] An installation frame, wherein the installation frame is slidably arranged in the slot, and a mounting groove is arranged in the middle of the installation frame;

[0015] A filter unit, the filter unit is arranged in the mounting groove and is used to filter smoke;

[0016] A knocking structure, the knocking structure is arranged between the filter part and the smoke exhaust pipe and is in contact with the surface of the filter part;

[0017] The collecting structure is arranged below the filter part to collect the cleaned dust.

[0018] In the technical solution, by cooperating between the opening, the slot, and the mounting frame, the operator can easily remove the mounting frame and replace the filter portion provided on the mounting frame, so as to facilitate the operator to replace or maintain the filter portion. In addition, the knocking structure provided can cooperate with the filter portion, and the filter portion can be vibrated by knocking to remove dust attached to the surface of the filter portion, which is beneficial to improve the filtering efficiency of the filter portion. The collection tank provided under the filter portion can collect the cleaned dust, so that the operator can collect and process the dust conveniently.

[0019] In the above technical solution, further, two groups of filter parts are symmetrically arranged on the installation frame, and the filter parts are detachably arranged in the installation groove;

[0020] Wherein, a fixing structure is arranged between the box body and the installation frame.

[0021] In the present technical solution, by setting up two groups of filter parts, it is possible to ensure that one of the filter parts can be replaced without stopping the equipment, which is beneficial to improving the efficiency of filter part maintenance. The fixed structure can also facilitate the positioning of the installation frame to prevent the installation frame from slipping out during use, which is beneficial to improving the stability of equipment use.

[0022] In the above technical solution, further, the fixing structure includes:

[0023] An adjusting rod, wherein the adjusting rod passes through the top surface of the box body, and the bottom of the adjusting rod is conical;

[0024] The limiting holes are arranged at the top of the mounting frame, match the shape of the bottom of the adjusting rod, and are arranged at two locations;

[0025] A cavity, wherein the cavity is arranged at the adjusting rod, a fixing ring is slidably arranged in the cavity, and the fixing ring is sleeved on the lower end of the adjusting rod;

[0026] A second spring, wherein the second spring is sleeved on the adjusting rod and is located between the top surface of the cavity and the top surface of the fixing ring;

[0027] A handle is arranged on the top of the adjusting rod and is arranged horizontally.

[0028] In this technical solution, the operator can lift the handle to move the adjustment rod upward, so that the adjustment rod is separated from the limit hole and the restriction of the mounting frame is released. The second spring can drive the fixing ring and the adjustment rod to move downward when the mounting frame moves to the corresponding position, and cooperate with the limit hole on the mounting frame to achieve the restriction effect. The fixed structure can be convenient for the operator to

[0029] In the above technical solution, further, the filter unit includes:

[0030] A limit plate, the limit plate is symmetrically arranged on the inner wall of the installation groove and is arranged close to the smoke exhaust pipe;

[0031] A fixing plate, the fixing plate is symmetrically arranged on the inner wall of the mounting groove and is far away from the smoke exhaust pipe;

[0032] The filter plate is movably arranged between the limiting plate and the fixing plate, and a plurality of groups of first springs are evenly arranged between the filter plate and the fixing plate.

[0033] In this technical solution, through the cooperation between the limit plate, the fixed plate and the first spring, under the drive of the knocking structure, the filter plate can be driven to shake in the installation groove, and the dust attached to the filter plate can be shaken off, which is beneficial to improve the efficiency of smoke filtration.

[0034] In the above technical solution, further, the knocking structure includes:

[0035] A rotating shaft, the rotating shaft is rotatably arranged in the box body, and a rotating block is sleeved on the rotating shaft;

[0036] The elastic sheet is arranged on the outer wall of the rotating block, and a plurality of the elastic sheets are evenly distributed in the circumferential direction based on the center of the rotating block.

[0037] In this technical solution, the driving motor drives the rotating shaft to rotate, thereby driving the rotating block and the elastic sheet to rotate. The elastic sheet arranged on the outer wall of the rotating block can knock the surface of the filter plate to move the filter plate, thereby improving the filtering efficiency of the filter part.

[0038] In the above technical solution, further, the collection structure includes:

[0039] A communication groove, which is arranged on the bottom surface of the box body and below the knocking structure;

[0040] A slide groove, which is symmetrically arranged on the bottom surface of the box body and is arranged in an "L" shape;

[0041] A collecting trough, which is movably arranged below the box body, and lugs are symmetrically arranged on both sides of the collecting trough, and the lugs are matched with the chute;

[0042] Wherein, a handle is arranged on the front of the collecting tank.

[0043] In this technical solution, during the shaking of the filter plate, the falling dust can fall into the collecting trough through the connecting groove. After a certain amount of dust is collected, the operator can pull the collecting trough out of the slide groove by the handle to facilitate the processing of the filtered dust.

[0044] In the above technical solution, further, the waste heat recovery structure includes:

[0045] A heat exchange box, wherein the heat exchange box is arranged above the box body and is connected to the box body, and a connecting pipe is arranged above the heat exchange box;

[0046] The heat absorbing pipe is arranged in a serpentine shape in the heat exchange box, and one end of the heat absorbing pipe is connected to the water inlet pipe, and the other end is connected to the water return pipe.

[0047] In this technical solution, the filtered flue gas enters the heat absorption box from the box body, increasing the temperature of the water in the heat absorption tube in the heat absorption box, and the serpentine arrangement of the heat absorption tube can increase the contact area between the heat absorption tube and the flue gas, which is beneficial to improving the heat exchange efficiency.

[0048] In the above technical solution, further, the mounting frame and the opening contact surface are both provided with sealing strips.

[0049] In the technical solution, the sealing strip is provided to improve the sealing between the installation frame and the opening, thereby preventing smoke from leaking from the box body.

[0050] The beneficial effects of the utility model are:

[0051] 1. The flue gas generated by combustion in the boiler is discharged to the filtering mechanism through the exhaust pipe. The filtering mechanism can filter the dust in the flue gas to prevent the dust from adhering to the waste heat recovery structure and affecting the efficiency of waste heat recovery. Through the set return pipe, the hot water after waste heat recovery can be returned to the boiler for reuse, which is conducive to improving the utilization rate of energy.

[0052] 2. Through the cooperation between the opening, the slot and the mounting frame, the operator can easily take out the mounting frame and replace the filter part set on the mounting frame, which is convenient for the operator to replace or maintain the filter part. And the knocking structure can cooperate with the filter part, and the filter part can be vibrated by knocking to remove the dust attached to the surface of the filter part, which is beneficial to improve the filtering efficiency of the filter part. The collection groove set under the filter part can collect the cleaned dust, which is convenient for the operator to collect and process the dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0054] Figure 2 It is a cross-sectional view of the utility model;

[0055] Figure 3 It is a cross-sectional view of the fixed structure of the utility model;

[0056] Figure 4 This utility model Figure 1 A magnified image of the middle A area;

[0057] Figure 5 This utility model Figure 2 Enlarged view of area B;

[0058] The symbols in the figure are:

[0059] 1. Boiler; 2. Smoke exhaust pipe; 3. Filter mechanism; 301. Box; 302. Opening; 303. Slot; 304. Mounting frame; 305. Mounting slot; 4. Waste heat recovery structure; 401. Heat exchange box; 402. Connecting pipe; 403. Heat absorption pipe; 5. Return pipe; 6. Filter unit; 601. Limiting plate; 602. Fixing plate; 603. Filter plate; 604. First spring; 7. Collecting structure; 701. Connecting slot; 702. Slide slot; 703. Collecting slot; 704. Ear plate; 705. Handle; 8. Knocking structure; 801. Rotating shaft; 802. Rotating block; 803. Elastic sheet; 9. Fixing structure; 901. Adjusting rod; 902. Limiting hole; 903. Cavity; 904. Fixing ring; 905. Handle; 906. Second spring; 10. Sealing strip. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0061] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0062] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0063] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0064] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0065] Embodiment 1:

[0066] Depend on Figure 1-Figure 5 As shown, this embodiment provides a production return water waste heat recovery device, including: a boiler 1, a filtering mechanism 3 is arranged on the side of the boiler 1, and a smoke exhaust pipe 2 is arranged in communication between the filtering mechanism 3 and the boiler 1; a waste heat recovery structure 4, the waste heat recovery structure 4 is arranged above the filtering mechanism 3 and is arranged in communication with the filtering mechanism 3; a return water pipe 5, the return water pipe 5 is arranged in communication between the waste heat recovery structure 4 and the boiler 1.

[0067] The flue gas generated by combustion in the boiler 1 is discharged to the filtering mechanism 3 through the exhaust pipe 2. The filtering mechanism 3 can filter the dust in the flue gas to prevent the dust from adhering to the waste heat recovery structure 4 and affecting the efficiency of waste heat recovery. Through the set return pipe 5, the hot water after waste heat recovery can be returned to the boiler 1 for reuse, which is beneficial to improving the utilization rate of energy.

[0068] Furthermore, the filtering mechanism 3 includes: a box body 301, a support frame is arranged below the box body 301, and an opening 302 is symmetrically arranged on the side wall of the box body 301; a slot 303, the slot 303 is arranged inside the box body 301 and cooperates with the opening 302; a mounting frame 304, the mounting frame 304 is slidably arranged in the slot 303, and a mounting groove 305 is arranged in the middle of the mounting frame 304; a filter part 6, the filter part 6 is arranged in the mounting groove 305 to filter the smoke; a knocking structure 8, the knocking structure 8 is arranged between the filter part 6 and the smoke exhaust pipe 2, and is in contact with the surface of the filter part 6; a collecting structure 7, the collecting structure 7 is arranged below the filter part 6 to collect the cleaned dust.

[0069] Through the cooperation between the opening 302, the slot 303, and the mounting frame 304, the operator can easily remove the mounting frame 304 and replace the filter 6 set on the mounting frame 304, which is convenient for the operator to replace or maintain the filter 6. In addition, the knocking structure 8 can cooperate with the filter 6 to vibrate the filter 6 by knocking, so as to remove dust attached to the surface of the filter 6, which is beneficial to improve the filtering efficiency of the filter 6. The collection groove 703 set below the filter 6 can collect the cleaned dust, which is convenient for the operator to collect and process the dust.

[0070] Embodiment 2:

[0071] Depend on Figure 1-Figure 3 As shown, this embodiment provides a production return water waste heat recovery device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0072] Furthermore, two groups of filter parts 6 are symmetrically arranged on the installation frame 304 , and the filter parts 6 are detachably arranged in the installation groove 305 ; wherein a fixing structure 9 is arranged between the box body 301 and the installation frame 304 .

[0073] By setting up two groups of filter parts 6, it is possible to ensure that one of the filter parts 6 can be replaced without stopping the equipment, which is beneficial to improving the efficiency of maintenance of the filter part 6. The fixing structure 9 can facilitate the positioning of the installation frame 304 to prevent the installation frame 304 from slipping out during use, which is beneficial to improving the stability of the equipment.

[0074] Furthermore, the fixing structure 9 includes: an adjusting rod 901, the adjusting rod 901 passes through the top surface of the box body 301, and the bottom of the adjusting rod 901 is conically set; a limiting hole 902, the limiting hole 902 is set at the top of the mounting frame 304, matches the shape of the bottom of the adjusting rod 901, and is set at two locations; a cavity 903, the cavity 903 is set at the adjusting rod 901, and a fixing ring 904 is slidably set in the cavity 903, and the fixing ring 904 is sleeved on the lower end of the adjusting rod 901; a second spring 906, the second spring 906 is sleeved on the adjusting rod 901, and is located between the top surface of the cavity 903 and the top surface of the fixing ring 904; a handle 905, the handle 905 is set on the top of the adjusting rod 901, and is set horizontally.

[0075] The operator can lift the handle 905 to move the adjustment rod 901 upward, so that the adjustment rod 901 is separated from the limiting hole 902, and the restriction of the mounting frame 304 is released. The second spring 906 can drive the fixing ring 904 and the adjustment rod 901 to move downward when the mounting frame 304 moves to the corresponding position, and cooperate with the limiting hole 902 on the mounting frame 304 to achieve the restriction effect. The fixing structure 9 can facilitate the operator to fix the mounting frame 304, which is conducive to improving the efficiency of the operator's maintenance.

[0076] Embodiment 3:

[0077] Depend on Figure 1-Figure 5 As shown, this embodiment provides a production return water waste heat recovery device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0078] Furthermore, the filter part 6 includes: a limit plate 601, which is symmetrically arranged on the inner wall of the installation groove 305 and is arranged close to the smoke exhaust pipe 2; a fixed plate 602, which is symmetrically arranged on the inner wall of the installation groove 305 and is arranged away from the smoke exhaust pipe 2; a filter plate 603, which is movably arranged between the limit plate 601 and the fixed plate 602, and a plurality of groups of first springs 604 are evenly distributed between the filter plate 603 and the fixed plate 602.

[0079] Through the cooperation among the limiting plate 601, the fixing plate 602 and the first spring 604, the filter plate 603 can be driven to vibrate in the mounting groove 305 under the drive of the knocking structure 8, so as to shake off the dust attached to the filter plate 603, which is beneficial to improve the efficiency of smoke filtration.

[0080] Furthermore, the knocking structure 8 includes: a rotating shaft 801, which is rotatably arranged in the box body 301, and a rotating block 802 is sleeved on the rotating shaft 801; an elastic sheet 803, which is arranged on the outer wall of the rotating block 802, and is evenly distributed circumferentially based on the center of the rotating block 802.

[0081] The driving motor drives the rotating shaft 801 to rotate, thereby driving the rotating block 802 and the elastic sheet 803 to rotate. The elastic sheet 803 arranged on the outer wall of the rotating block 802 can knock on the surface of the filter plate 603 to move the filter plate 603, thereby improving the filtering efficiency of the filter unit 6.

[0082] Furthermore, the collecting structure 7 includes: a connecting groove 701, which is arranged on the bottom surface of the box body 301 and is located below the knocking structure 8; a slide groove 702, which is symmetrically arranged on the bottom surface of the box body 301 and is an "L"-shaped arrangement; a collecting groove 703, which is movably arranged below the box body 301, and ear plates 704 are symmetrically arranged on both sides of the collecting groove 703, and the ear plates 704 cooperate with the slide groove 702; wherein, a handle 705 is arranged on the front of the collecting groove 703.

[0083] When the filter plate 603 shakes, the fallen dust can fall into the collecting groove 703 through the connecting groove 701. After a certain amount of dust is collected, the operator can pull the collecting groove 703 out of the slide groove 702 through the handle 705 to facilitate the processing of the filtered dust.

[0084] Furthermore, the waste heat recovery structure 4 includes: a heat exchange box 401, which is arranged above the box body 301 and is connected to the box body 301, and a connecting pipe 402 is arranged above the heat exchange box 401; a heat absorption pipe 403, which is serpentinely arranged in the heat exchange box 401, and one end of the heat absorption pipe 403 is connected to the water inlet pipe, and the other end is connected to the return pipe 5.

[0085] The filtered flue gas enters the heat absorption box from the box body 301, raising the temperature of the water in the heat absorption tube 403 in the heat absorption box. In addition, the serpentine arrangement of the heat absorption tube 403 can increase the contact area between the heat absorption tube 403 and the flue gas, which is beneficial to improving the heat exchange efficiency.

[0086] Furthermore, the contact surfaces of the mounting frame 304 and the opening 302 are both provided with sealing strips 10 .

[0087] The sealing strip 10 can improve the sealing between the mounting frame 304 and the opening 302 , thereby preventing smoke from leaking from the box body 301 .

[0088] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A production return water waste heat recovery device, characterized in that ,include: A boiler (1), wherein a filtering mechanism (3) is arranged on the side of the boiler (1), and a smoke exhaust pipe (2) is arranged in communication between the filtering mechanism (3) and the boiler (1); A waste heat recovery structure (4), wherein the waste heat recovery structure (4) is arranged above the filter mechanism (3) and is connected to the filter mechanism (3); A water return pipe (5), wherein the water return pipe (5) is arranged in communication between the waste heat recovery structure (4) and the boiler (1).

2. A production return water waste heat recovery device according to claim 1, characterized in that: The filtering mechanism (3) comprises: A box body (301), wherein a support frame is arranged below the box body (301), and openings (302) are symmetrically arranged on the side walls of the box body (301); A slot (303), wherein the slot (303) is disposed inside the box body (301) and matches the opening (302); A mounting frame (304), wherein the mounting frame (304) is slidably disposed in the slot (303), and a mounting groove (305) is disposed in the middle of the mounting frame (304); A filter unit (6), the filter unit (6) being arranged in the mounting groove (305) and used for filtering smoke; a knocking structure (8), the knocking structure (8) being arranged between the filter portion (6) and the smoke exhaust pipe (2) and in contact with the surface of the filter portion (6); A collecting structure (7), wherein the collecting structure (7) is arranged below the filtering portion (6) and is used to collect the cleaned dust.

3. A production return water waste heat recovery device according to claim 2, characterized in that: Two groups of filter parts (6) are symmetrically arranged on the installation frame (304), and the filter parts (6) are detachably arranged in the installation groove (305); Wherein, a fixing structure (9) is provided between the box body (301) and the mounting frame (304).

4. A production return water waste heat recovery device according to claim 3, characterized in that: The fixing structure (9) comprises: An adjusting rod (901), wherein the adjusting rod (901) passes through the top surface of the box body (301), and the bottom of the adjusting rod (901) is conical; A limiting hole (902), wherein the limiting hole (902) is arranged at the top of the mounting frame (304), matches the shape of the bottom of the adjusting rod (901), and is arranged at two locations; A cavity (903), wherein the cavity (903) is arranged at the adjusting rod (901), a fixing ring (904) is slidably arranged in the cavity (903), and the fixing ring (904) is sleeved on the lower end of the adjusting rod (901); A second spring (906), the second spring (906) is sleeved on the adjustment rod (901) and is located between the top surface of the cavity (903) and the top surface of the fixing ring (904); A handle (905) is disposed on the top of the adjusting rod (901) and is disposed in a horizontal direction.

5. The production return water waste heat recovery device according to claim 3 is characterized in that: The filter unit (6) comprises: A limiting plate (601), the limiting plate (601) being symmetrically arranged on the inner wall of the mounting groove (305) and being arranged close to the smoke exhaust pipe (2); A fixing plate (602), the fixing plate (602) being symmetrically arranged on the inner wall of the mounting groove (305) in a vertical direction and being arranged away from the smoke exhaust pipe (2); The filter plate (603) is movably arranged between the limiting plate (601) and the fixing plate (602), and a plurality of groups of first springs (604) are evenly arranged between the filter plate (603) and the fixing plate (602).

6. A production return water waste heat recovery device according to claim 2, characterized in that: The knocking structure (8) comprises: A rotating shaft (801), the rotating shaft (801) is rotatably disposed in the box body (301), and a rotating block (802) is sleeved on the rotating shaft (801); The elastic sheet (803) is arranged on the outer wall of the rotating block (802), and a plurality of the elastic sheets (803) are evenly distributed in the circumferential direction based on the center of the rotating block (802).

7. The production return water waste heat recovery device according to claim 2, characterized in that: The collecting structure (7) comprises: A communication groove (701), wherein the communication groove (701) is arranged on the bottom surface of the box body (301) and is located below the knocking structure (8); A slide groove (702), wherein the slide groove (702) is symmetrically arranged on the bottom surface of the box body (301) and is arranged in an "L" shape; A collecting trough (703), wherein the collecting trough (703) is movably arranged below the box body (301), and ear plates (704) are symmetrically arranged on both sides of the collecting trough (703), and the ear plates (704) are matched with the slide trough (702); Wherein, a handle (705) is provided on the front of the collecting tank (703).

8. The production return water waste heat recovery device according to claim 1, characterized in that: The waste heat recovery structure (4) comprises: A heat exchange box (401), the heat exchange box (401) is arranged above the box body (301), is connected to the box body (301), and a connecting pipe (402) is arranged above the heat exchange box (401); A heat absorption pipe (403), wherein the heat absorption pipe (403) is arranged in a serpentine shape in the heat exchange box (401), and one end of the heat absorption pipe is connected to the water inlet pipe, and the other end of the heat absorption pipe is connected to the water return pipe (5).

9. The production return water waste heat recovery device according to claim 2, characterized in that: The contact surfaces of the installation frame (304) and the opening (302) are both provided with sealing strips (10).

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