Waste heat recovery equipment based on multistage film layer heat exchange

Abstract

The invention relates to the related technical field of waste heat recovery, and discloses waste heat recovery equipment based on multistage film heat exchange, which comprises a box body, a water inlet tank is arranged on the lower side in the box body, a heat exchange cylinder is arranged on the upper side of the water inlet tank, a spiral plate is arranged in the heat exchange cylinder, and a first spiral heat exchange pipeline is fixedly arranged in the heat exchange cylinder; tap water can be sprayed to the outer walls of the drainage pipes and the outer walls of the lower ends of the second spiral heat exchange pipelines through the spray valves, so that the tap water flows downwards along the outer walls of the drainage pipes and the outer walls of the lower ends of the second spiral heat exchange pipelines; a water film of tap water can absorb heat of waste water in the drainage pipe and heat of steam in the second spiral heat exchange pipeline; and then the waste water in the disc is sprayed out through a plurality of spray heads, so that the waste water flows downwards along the outer wall of the first spiral heat exchange pipeline in a film forming mode, tap water in the first spiral heat exchange pipeline absorbs heat of a water film, and the multi-stage film heat exchange effect on the tap water is facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field related to waste heat recovery, and more specifically, particularly relates to a waste heat recovery device based on multi-stage membrane layer heat exchange. Background Art

[0002] During normal operation, commercial dishwashers need to continuously discharge high-temperature waste water from the main wash water tank through the overflow pipe. The temperature of the discharged high-temperature waste water is usually 55°C-60°C. This part of high-temperature water is directly discharged into the sewer, causing energy waste. The high-power energy-consuming component of the dishwasher is the heating tube, which is mainly used to electrically heat the normal-temperature tap water entering the dishwasher to high-temperature water above 80°C. If the initial temperature of the tap water entering the dishwasher can be increased, the electric heating power of the dishwasher can be reduced. Therefore, heat exchange technology for dishwasher waste water has appeared on the market. However, the waste heat recovery in the existing technology has the following defects:

[0003] 1. In the prior art, in order to improve the quality of waste heat recovery, waste heat recovery equipment usually sprays waste water onto the outer wall of the heat exchange pipe through a nozzle. The waste water flows down along the outer wall of the heat exchange pipe in a film layer, and the tap water in the heat exchange pipe absorbs the heat of the water film to preheat the tap water. However, the waste water after spraying falls directly to the bottom, resulting in a short contact time between the waste water and the heat exchange pipe, making it difficult for the waste water to fully contact with the tap water, thereby affecting the quality of waste heat recovery.

[0004] 2. In the prior art, when a dishwasher is used, a large amount of steam is present in the dishwasher, and the steam carries a large amount of waste heat. In order to ensure energy-saving use of the dishwasher, it is necessary to recycle the steam in the dishwasher through waste heat recovery equipment;

[0005] 3. In the prior art, when the waste heat recovery equipment utilizes the waste heat of dishwasher waste water for recovery, due to the presence of particulate impurities in the waste water, the nozzle will inevitably be clogged in the process of spraying the waste water onto the outer wall of the heat exchange pipe; and the impurities in the waste water are easily attached to the outer wall of the heat exchange pipe, causing corrosion damage to the heat exchange pipe and reducing the contact area between the heat exchange pipe and the waste water. Therefore, during heat exchange, the waste water needs to be filtered and purified in advance.

[0006] Therefore, in view of this, the existing structure and deficiencies are studied and improved, and a waste heat recovery device based on multi-stage membrane heat exchange is provided, in order to achieve a more practical and valuable purpose. Summary of the invention

[0007] The present invention provides a waste heat recovery device based on multi-stage membrane layer heat exchange, which is used to overcome the above-mentioned defects in the prior art.

[0008] The purpose and effect of the waste heat recovery device based on multi-stage membrane heat exchange of the present invention are achieved by the following specific technical means:

[0009] A waste heat recovery device based on multi-stage membrane heat exchange comprises a box body, a dishwasher is arranged on the upper side of the box body, a water inlet tank is arranged on the lower side of the inner part of the box body, a heat exchange cylinder is arranged on the upper side of the water inlet tank, a sliding rod is arranged inside the heat exchange cylinder for sliding movement, a spiral plate is fixedly arranged on the outer side of the sliding rod, a first spiral heat exchange pipe is fixedly arranged inside the heat exchange cylinder, a second spiral heat exchange pipe is fixedly arranged inside the first spiral heat exchange pipe, a plurality of baffles are fixedly arranged on the spiral surface of the spiral plate at intervals, each of the baffles is provided with a groove, each of the first spiral heat exchange pipe is located in the groove, a fixing plate is fixedly arranged on the upper side of the inner part of the box body, a circular plate is arranged in the middle of the upper side of the fixing plate Cylinder, a piston plate is slidably provided inside the cylinder, a processing chamber and an air chamber are separated inside the cylinder by the piston plate, a plurality of processing components are provided on the lower side of the piston plate, a disc is fixedly provided on the lower side of the fixed plate, and a plurality of nozzles are provided on the lower side of the disc; the processing component comprises a movable plate, a plurality of I-shaped blocks are fixedly provided on the lower side of the movable plate, a concave block is provided on the lower side of each I-shaped block, an annular grinding piece is fixedly provided on the lower side of each concave block, a filter plate is vertically slidably provided inside the processing chamber, the lower end of each I-shaped block vertically slides in the concave block, a push rod is fixedly provided on the lower end of each I-shaped block, and a rubber bump is provided on the lower end of each push rod.

[0010] A further technical solution is that a hollow elastic member is connected between the lower end of each I-shaped block and the interior of the concave block, the interior of the hollow elastic member is interconnected with the interior of the movable plate, the interior of each movable plate is filled with a softener, the interior of each hollow elastic member is connected with the interior of the push rod, a spray hole is provided in the middle of each rubber protrusion, each spray hole is connected with the interior of the push rod, an annular cleaning member is fixedly provided on the inner side of each annular grinding member, the inner side of the annular cleaning member is in sliding contact with the outer side of the rubber protrusion, and the processing chamber is located below the air cavity. Among them, the annular cleaning member is used to perform contact cleaning on the outer side of the rubber protrusion, reduce the impurities carried on the rubber protrusion, and avoid affecting the rubber protrusion to dredge the filter holes of the filter plate. When the piston plate moves upward, the concave block is out of contact with the filter plate, and the hollow elastic member moves and resets under the elastic force of the hollow elastic member, and the hollow elastic member restores its shape to absorb the softener in the movable plate into the hollow elastic member, so as to replenish the softener in the hollow elastic member.

[0011] A further technical solution is that two first sliding blocks are symmetrically fixed on the outer side of the piston plate, and two arc-shaped grooves are symmetrically provided on the inner wall of the processing chamber, and the two first sliding blocks slide in an arc shape in the two arc-shaped grooves respectively, and the two arc-shaped grooves are connected to each other at the head and tail to form a wave-shaped groove structure; a plurality of first sliding grooves are provided in a circular array at the lower part of the piston plate, and a T-shaped sliding block is provided for horizontal sliding inside each of the first sliding grooves, and a first spring is provided between one side of each T-shaped sliding block and one side of each first sliding groove, and a connecting rod is fixed on the lower side of each T-shaped sliding block, and the lower end of each connecting rod is fixedly connected to the upper side of the movable plate; a plurality of annular blocks are fixed at vertical intervals on the inner wall of the processing chamber, and a push rod is fixed on the side of each connecting rod away from the sliding rod, and one end of each push rod is in sliding contact with the inner side of the annular block.

[0012] According to a further technical solution, two second slide grooves are symmetrically provided on the inner wall of the processing chamber, two second sliders are vertically slidably provided inside the two second slide grooves, the two second sliders are respectively fixedly connected to the two sides of the two filter plates, and a second spring is provided between the two second sliders and the two second slide grooves.

[0013] According to a further technical solution, two annular plates are fixedly provided at vertical intervals on the outer side of the upper end of the slide rod, and the two annular plates are respectively located on the upper and lower sides of the piston plate, and the outer side of the slide rod is in sliding contact with the piston plate, and the outer side of the slide rod is in sliding contact with the filter plate.

[0014] A further technical solution is that an electric telescopic rod is provided on the lower inner side of the box body, the protruding end of the electric telescopic rod is fixedly connected to the lower end of the sliding rod, a slide plate is provided inside each groove for vertical sliding, the upper side of the slide plate is in contact with the outer side of the first spiral heat exchange pipe, and a third spring is provided to interconnect the lower side of the slide plate and the lower side of the groove.

[0015] According to a further technical solution, a wastewater treatment device, a water tank, a heating tank, and a purifier tank are provided on the upper side of the fixed plate; the interior of the purifier tank is connected to the treatment chamber and is provided with a first one-way valve; one end of the wastewater treatment device is connected to the interior of the dishwasher, and the other end of the wastewater treatment device is connected to the treatment chamber.

[0016] A further technical solution is that a water pump is provided inside the water inlet tank, one end of each of the first spiral heat exchange pipes is connected to the interior of the water tank, the other end of each of the first spiral heat exchange pipes is connected to the water pump, the interior of the water tank is connected to the interior of the heating box by a water pipe, and a heater is provided inside the heating box.

[0017] According to a further technical solution, a first air pipe is provided in communication with the air cavity and the upper inner side of the dishwasher, a second one-way valve is provided inside the first air pipe, an air box is fixedly provided inside the water tank, a second air pipe is provided inside the air box and communicated with the air cavity, and a third one-way valve is provided inside the second air pipe.

[0018] A further technical solution is that one end of each of the second spiral heat exchange pipes is connected to the interior of the air box, and the other end of each of the second spiral heat exchange pipes passes through the water inlet tank and extends to the bottom of the box body. A waste water tank is fixedly provided on the lower side of the box body. The interior of the heat exchange cylinder is connected to the interior of the waste water tank and is provided with a plurality of drain pipes. The plurality of drain pipes all pass through the interior of the water inlet tank, and a spray valve is provided on one side of the water inlet tank.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The waste heat recovery equipment based on multi-stage membrane heat exchange of the present invention, through the arrangement of a piston plate, a movable plate, an I-shaped block, and a concave block, the piston plate moves upward to draw the wastewater in the wastewater treatment device into the treatment chamber, and at the same time, the purifier in the purifier box is drawn into the treatment chamber through a first one-way valve; and the piston plate moves upward to drive two first sliders to slide in an arc in two arc-shaped slide grooves, and the two arc-shaped slide grooves are connected to each other head to tail, so that the piston plate moves upward and rotates; the rotation of the piston plate drives a plurality of T-shaped sliders, a connecting rod, and a movable plate to rotate, and the rotation of the movable plate drives a plurality of I-shaped blocks and a concave block to rotate, so as to stir and mix the wastewater and the purifier in the treatment chamber, so as to soften the impurities in the wastewater, and prevent the impurities in the wastewater from clogging the nozzle. Then, through the setting of the push rod and the annular block, under the action of the contact guide between one end of the push rod and the annular block and the action of the first spring elastic force, the connecting rod can be moved back and forth horizontally, so as to improve the stirring effect on the wastewater in the treatment chamber; and when the filter plate moves to the lowest point and the annular grinding piece contacts the upper side of the filter plate, the connecting rod moves back and forth horizontally and rotates to drive the movable plate, the I-shaped block, and the concave block to move back and forth horizontally and rotate, and the concave block moves back and forth horizontally and rotates to match the filter plate to fix, so as to grind and crush the impurities on the upper side of the filter plate. Then, through the setting of the push rod and the rubber protrusion, the annular grinding piece and the concave block are resisted by the filter plate, the I-shaped block continues to move downward, and the downward movement of the I-shaped block drives the push rod and the rubber protrusion to move downward, and the rubber protrusion moves downward into the filter hole of the filter plate, so as to dredge the impurities blocked in the filter hole of the filter plate; and the rubber protrusion is elastic, and the rotation of the I-shaped block drives the push rod and the rubber protrusion to rotate, and the rotation of the rubber protrusion can dredge several filter holes on the filter plate to maintain the filtering effect of the filter plate. Finally, through the arrangement of the hollow elastic part and the spray hole, the annular grinding part and the concave block are resisted by the filter plate, and the I-shaped block continues to move downward, and the I-shaped block moves downward to extrude and deform the hollow elastic part. While the hollow elastic part deforms to generate elastic force, the softener in the hollow elastic part is squeezed into the push rod, and the softener in the push rod is sprayed onto the filter plate through the rubber convex block, softening the impurities in the filter holes of the filter plate, so as to cooperate with the spray hole to dredge the impurities in the filter holes of the filter plate, thereby improving the anti-blocking effect of the cleaning component on the filter plate and preventing impurities in the wastewater from entering several nozzles and causing blockage of several nozzles.

[0021] The waste heat recovery device based on multi-stage membrane heat exchange of the present invention is provided with a spray valve, a drain pipe, and a second spiral heat exchange pipe. The spray valve sprays tap water onto the outer wall of a plurality of drain pipes and the outer wall of the lower end of a plurality of second spiral heat exchange pipes, so that the tap water flows down along the outer wall of the drain pipe and the outer wall of the lower end of the second spiral heat exchange pipe in a film layer, so that the water film of the tap water absorbs the heat of the waste water in the drain pipe and the heat of the steam in the second spiral heat exchange pipe, so as to preheat the tap water, thereby performing a primary membrane heat exchange. Furthermore, through the provision of a nozzle, when the tap water moves upward in the first spiral heat exchange pipe to the bottom of the disc, a plurality of nozzles spray the waste water in the disc, so that the waste water flows down along the outer wall of the first spiral heat exchange pipe in a film layer, and the tap water in the first spiral heat exchange pipe absorbs the heat of the water film of the waste water, so as to perform a secondary membrane heat exchange on the tap water, so as to perform a multi-stage membrane heat exchange on the tap water.

[0022] The waste heat recovery device based on multi-stage membrane heat exchange of the present invention, through the arrangement of the first spiral heat exchange pipe, the second spiral heat exchange pipe, and the spiral plate, through the shape of the first spiral heat exchange pipe, the tap water is moved upward in the heat exchange cylinder in a spiral manner, and the stroke of the tap water in the heat exchange cylinder is extended. And through the shape of the second spiral heat exchange pipe, the steam in the air box is moved downward in a spiral manner, and the stroke of the steam in the heat exchange cylinder is extended, so that the steam in the second spiral heat exchange pipe can be fully contacted with the tap water in the first spiral heat exchange pipe for heat exchange. Through the shape of the spiral plate, the waste water sprayed from a plurality of nozzles is moved downward in a spiral manner in the heat exchange cylinder, and the stroke of the waste water in the heat exchange cylinder is extended, so that the waste water can be fully contacted with the tap water in the first spiral heat exchange pipe for heat exchange, thereby utilizing the waste water and steam to perform internal and external dual heating on the tap water in the first spiral heat exchange pipe, improving the efficiency of heating the tap water in the first spiral heat exchange pipe, and reasonably recovering and utilizing the waste heat generated by the dishwasher. Then, by setting the baffles, the wastewater on the upper side of the spiral plate is blocked by several baffles, so that the wastewater is accumulated on the upper side of the spiral plate, so that the outer wall of the first spiral heat exchange pipe is fully in contact with the wastewater, and the contact time and contact area between the wastewater and the tap water in the first spiral heat exchange pipe are increased. Finally, through the slide plate and the third spring, the slide bar moves up and down to drive the spiral plate and several baffles to move up and down, and the height of the slide plate is adjusted under the elastic force of the third spring, so that the amount of wastewater blocked by the baffle can be adjusted according to the amount of wastewater sprayed by several nozzles, so that the wastewater can be fully in contact with the outer wall of the first spiral heat exchange pipe, and the efficiency of heat exchange between the wastewater and the tap water in the second spiral heat exchange pipe is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is an isometric structural schematic diagram of the present invention;

[0026] Figure 2 It is a front view structural schematic diagram of the present invention;

[0027] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0028] Figure 4 for Figure 3 A schematic diagram of the structure of the partial enlarged view at C in the middle;

[0029] Figure 5 for Figure 3 The structural schematic diagram of the local enlarged view at D in the middle;

[0030] Figure 6 for Figure 5 The structural schematic diagram of the local enlarged view at E in the middle;

[0031] Figure 7 It is a schematic diagram of the top view of the structure of the present invention;

[0032] Figure 8 for Figure 7 Schematic diagram of the cross-section structure at BB in the middle;

[0033] Fig. 9 for Figure 8 The structural schematic diagram of the local enlarged view at F in the middle;

[0034] Fig.10 It is an isometric structural schematic diagram of the internal structure of the heat exchange tube in the present invention.

[0035] Description of reference numerals:

[0036] Box body 10, dishwasher 11, slide bar 13, spiral plate 14, first spiral heat exchange pipe 15, second spiral heat exchange pipe 16, heat exchange cylinder 17, water inlet tank 18, fixed plate 19, wastewater treatment device 20, cylinder 21, piston plate 22, treatment chamber 23, air chamber 24, annular plate 25, first slider 26, arc chute 27, first chute 28, T-shaped slider 29, first spring 30, connecting rod 31, movable plate 32, I-shaped block 33, concave block 34, annular grinding member 35, push rod 36, rubber bump 37, annular cleaning member 38 , hollow elastic member 39, spray hole 40, filter plate 41, second slider 42, second slide groove 43, second spring 44, annular block 45, push rod 46, purifier box 47, first one-way valve 48, disc 49, nozzle 50, baffle 51, groove 52, slide plate 53, third spring 54, drain pipe 55, waste water tank 56, water pump 57, spray valve 58, electric telescopic rod 59, first air pipe 60, second one-way valve 61, water tank 62, air box 63, second air pipe 64, third one-way valve 65, water pipe 66, heating box 67, heater 68. DETAILED DESCRIPTION

[0037] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] As attached Figure 1 To Attachment Fig.10 As shown:

[0041] The invention provides a waste heat recovery device based on multi-stage membrane layer heat exchange.

[0042] See attached Figure 1 To Attachment Fig.10 , including a box body 10, a dishwasher 11 is provided on the upper side of the box body 10, a water inlet box 18 is provided on the lower side of the box body 10, a heat exchange cylinder 17 is provided on the upper side of the water inlet box 18, a slide rod 13 is provided inside the heat exchange cylinder 17 for sliding, a spiral plate 14 is fixedly provided on the outer side of the slide rod 13, a first spiral heat exchange pipe 15 is fixedly provided inside the heat exchange cylinder 17, a second spiral heat exchange pipe 16 is fixedly provided inside the first spiral heat exchange pipe 15, a plurality of baffles 51 are fixedly provided on the spiral surface of the spiral plate 14 at intervals, each baffle 51 is provided with a groove 52, each first spiral heat exchange pipe 15 is located in the groove 52, a fixing plate 19 is fixedly provided on the upper side of the box body 10, a cylinder 21 is provided in the middle of the upper side of the fixing plate 19, and the inner side of the cylinder 21 A piston plate 22 is slidably provided on the cylinder 21, and a processing chamber 23 and an air chamber 24 are separated inside the cylinder 21 by the piston plate 22. A plurality of processing components are provided on the lower side of the piston plate 22, a disc 49 is fixedly provided on the lower side of the fixed plate 19, and a plurality of nozzles 50 are provided on the lower side of the disc 49; the processing component comprises a movable plate 32, a plurality of I-shaped blocks 33 are fixedly provided on the lower side of the movable plate 32, a concave block 34 is provided on the lower side of each I-shaped block 33, and an annular grinding member 35 is fixedly provided on the lower side of each concave block 34, a filter plate 41 is vertically slidably provided inside the processing chamber 23, the lower end of each I-shaped block 33 vertically slides in the concave block 34, a push rod 36 is fixedly provided on the lower end of each I-shaped block 33, and a rubber bump 37 is provided on the lower end of each push rod 36.

[0043] Preferably, see Attachment Figure 5 To Attachment Figure 6 , Attachment Figure 8 , Attachment Fig. 9 A hollow elastic member 39 is interconnected between the lower end of each I-shaped block 33 and the interior of the concave block 34. The interior of the hollow elastic member 39 is communicated with the interior of the movable plate 32. A softener is installed in the interior of each movable plate 32. The interior of each hollow elastic member 39 is communicated with the interior of the push rod 36. A spray hole 40 is provided in the middle of each rubber protrusion 37. Each spray hole 40 is communicated with the interior of the push rod 36. An annular cleaning member 38 is fixedly provided on the inner side of each annular grinding member 35. The inner side of the annular cleaning member 38 is in sliding contact with the outer side of the rubber protrusion 37. The processing chamber 23 is located below the air chamber 24.

[0044] Preferably, see Attachment Figure 8 , Attachment Fig. 9Two first sliders 26 are symmetrically fixed on the outer side of the piston plate 22, and two arc-shaped slide grooves 27 are symmetrically provided on the inner wall of the processing chamber 23. The two first sliders 26 slide in an arc shape in the two arc-shaped slide grooves 27 respectively, and the two arc-shaped slide grooves 27 are connected to each other head to tail to form a wave-shaped slide groove structure. A plurality of first slide grooves 28 are provided in a circumferential array at the lower part of the piston plate 22, and a T-shaped slider 29 is provided inside each first slide groove 28 for horizontal sliding. A first spring 30 is interconnected between one side of each T-shaped slider 29 and one side of each first slide groove 28. A connecting rod 31 is fixed on the lower side of each T-shaped slider 29, and the lower end of each connecting rod 31 is fixedly connected to the upper side of the movable plate 32. A plurality of annular blocks 45 are fixedly provided on the inner wall of the processing chamber 23 at vertical intervals, and a push rod 46 is fixed on the side of each connecting rod 31 away from the slide rod 13, and one end of each push rod 46 is in sliding contact with the inner side of the annular block 45.

[0045] Preferably, see Attachment Fig. 9 Two second slide grooves 43 are symmetrically provided on the inner wall of the processing chamber 23, and two second sliders 42 are vertically slidably provided inside the two second slide grooves 43. The two second sliders 42 are respectively fixedly connected to the two sides of the two filter plates 41, and a second spring 44 is provided between the two second sliders 42 and the two second slide grooves 43.

[0046] Preferably, see Attachment Fig. 9 Two annular plates 25 are fixedly disposed at intervals on the outer side of the upper end of the slide rod 13 , and the two annular plates 25 are respectively located on the upper and lower sides of the piston plate 22 . The outer side of the slide rod 13 is in sliding contact with the piston plate 22 , and the outer side of the slide rod 13 is in sliding contact with the filter plate 41 .

[0047] Preferably, see Attachment Figure 3 To Attachment Figure 4 An electric telescopic rod 59 is provided on the lower side of the interior of the box body 10, and the protruding end of the electric telescopic rod 59 is fixedly connected to the lower end of the slide rod 13. A slide plate 53 is provided inside each groove 52 for vertical sliding. The upper side of the slide plate 53 contacts the outer side of the first spiral heat exchange pipe 15, and a third spring 54 is provided between the lower side of the slide plate 53 and the lower side of the groove 52.

[0048] Preferably, see Attachment Figure 3 , Attachment Figure 5 , Attachment Figure 8 , Attachment Fig. 9 A wastewater treatment device 20, a water tank 62, a heating tank 67, and a purifier tank 47 are provided on the upper side of the fixed plate 19. The interior of the purifier tank 47 is connected to the processing chamber 23 and is provided with a first non-return valve 48. One end of the wastewater treatment device 20 is connected to the interior of the dishwasher 11, and the other end of the wastewater treatment device 20 is connected to the processing chamber 23.

[0049] Preferably, see Attachment Figure 3 , Attachment Figure 8 , Attachment Fig. 9 A water pump 57 is provided inside the water inlet tank 18, one end of each first spiral heat exchange pipe 15 is connected to the interior of the water tank 62, the other end of each first spiral heat exchange pipe 15 is connected to the water pump 57, the interior of the water tank 62 is connected to the interior of the heating box 67 by a water pipe 66, and a heater 68 is provided inside the heating box 67.

[0050] Preferably, see Attachment Figure 8 , Attachment Fig. 9 A first air pipe 60 is provided in communication with the air cavity 24 and the upper inner side of the dishwasher 11, a second one-way valve 61 is provided inside the first air pipe 60, an air box 63 is fixedly provided inside the water tank 62, a second air pipe 64 is provided inside the air box 63 and is communicated with the air cavity 24, and a third one-way valve 65 is provided inside the second air pipe 64.

[0051] Preferably, see Attachment Figure 3 , Attachment Figure 8 One end of each second spiral heat exchange pipe 16 is connected to the interior of the air box 63, and the other end of each second spiral heat exchange pipe 16 passes through the water inlet box 18 and extends to the bottom of the box body 10. A waste water tank 56 is fixedly provided on the lower side of the box body 10. The interior of the heat exchange cylinder 17 is connected to the interior of the waste water tank 56 and is provided with a plurality of drain pipes 55. The plurality of drain pipes 55 all pass through the interior of the water inlet box 18, and a spray valve 58 is provided on one side of the water inlet box 18.

[0052] Specific use of the present invention:

[0053] Utilization and treatment of steam and waste water in dishwasher 11.

[0054] First, the wastewater in the dishwasher 11 enters the wastewater treatment device 20 for treatment, so as to fully remove the larger impurities in the wastewater. The control system controls the electric telescopic rod 59 to extend and retract to drive the slide bar 13 to move up and down. The slide bar 13 moves upward to drive the two annular plates 25 to move upward. The two annular plates 25 move upward to drive the piston plate 22 to move upward. The piston plate 22 moves upward to pump the wastewater in the wastewater treatment device 20 into the treatment chamber 23, and the purifier in the purifier box 47 is pumped into the treatment chamber 23 through the first one-way valve 48.

[0055] At the same time, the piston plate 22 moves upward to drive the two first sliders 26 to slide in an arc shape in the two arc-shaped slide grooves 27, and the two arc-shaped slide grooves 27 are connected to each other at the head and tail, so that the piston plate 22 moves upward and rotates. The rotation of the piston plate 22 drives the plurality of T-shaped sliders 29, the connecting rod 31, and the movable plate 32 to rotate, and the rotation of the movable plate 32 drives the plurality of I-shaped blocks 33 and the concave blocks 34 to rotate, so as to stir and mix the wastewater and the purifier in the treatment chamber 23, so as to soften the impurities in the wastewater, and prevent the impurities in the wastewater from clogging the nozzle 50.

[0056] Secondly, the slide bar 13 moves downward through the two annular plates 25 to drive the piston plate 22 to move downward. The piston plate 22 moves downward to drive the two first sliders 26 to slide in an arc shape in the two arc-shaped slide grooves 27. The two arc-shaped slide grooves 27 are connected head to tail, so that the piston plate 22 moves downward and rotates. The piston plate 22 moves downward to squeeze the wastewater in the processing chamber 23 into the disc 49. The wastewater in the disc 49 is sprayed out through a plurality of nozzles 50, so that the wastewater flows down along the outer wall of the first spiral heat exchange pipe 15 to form a film layer. The tap water in the first spiral heat exchange pipe 15 absorbs the heat of the water film, so as to preheat the tap water. The wastewater in the processing chamber 23 is filtered through the filter plate 41, so that the impurities in the wastewater are retained on the upper side of the filter plate 41, and the impurities in the wastewater are prevented from clogging the plurality of nozzles 50.

[0057] At the same time, the piston plate 22 moves downward, driving the T-shaped slider 29, the connecting rod 31, and the movable plate 32 to move downward, and the movable plate 32 moves downward, driving the push rod 46 to move downward. One end of the push rod 46 slides in contact with the inner side of the annular block 45, and the push rod 46 moves downward to fit the annular block 45 for fixing. Under the guidance of the annular block 45, the connecting rod 31 moves horizontally, and the horizontal movement of the connecting rod 31 drives the connecting rod 31 and the T-shaped slider 29 to move horizontally. The T-shaped slider 29 moves horizontally in the first slide groove 28 to compress the first spring 30, and the first spring 30 is compressed to generate elastic force. When one end of the push rod 46 is out of contact with the inner side of the annular block 45, under the elastic force of the first spring 30, the T-shaped slider 29, the connecting rod 31 and the movable plate 32 are moved and reset, so that under the contact and guidance of one end of the push rod 46 and the annular block 45 and the elastic force of the first spring 30, the connecting rod 31 can move back and forth horizontally, so as to improve the stirring effect on the wastewater in the treatment chamber 23, and the filter plate 41 moves to the lowest point. When the annular grinding member 35 contacts the upper side of the filter plate 41, the connecting rod 31 moves back and forth horizontally and rotates to drive the movable plate 32, the I-shaped block 33 and the concave block 34 to move back and forth horizontally and rotate. The concave block 34 moves back and forth horizontally and rotates to match the filter plate 41 to be fixed, so as to grind and crush the impurities on the upper side of the filter plate 41.

[0058] At the same time, the piston plate 22 moves downward to suck the steam on the upper side of the dishwasher 11 into the air cavity 24 through the first air pipe 60 and the second one-way valve 61 .

[0059] Next, when the lower side of the annular grinding member 35 contacts the upper side of the filter plate 41, the piston plate 22 continues to move downward, the annular grinding member 35 moves downward to push the filter plate 41 downward, and the filter plate 41 moves downward to drive the two second sliders 42 to move vertically downward in the two second slide grooves 43 respectively, so as to compress the two second springs 44 to generate elastic force. When the filter plate 41 moves downward to the lowest point, the piston plate 22 rotates to drive the T-shaped slider 29, the connecting rod 31, and the movable plate 32 to rotate, and the movable plate 32 rotates to drive the I-shaped block 33, the concave block 34, and the annular grinding member 35 to rotate, and the annular grinding member 35 rotates to match the filter plate 41 to be fixed, so as to grind and crush the impurities on the upper side of the filter plate 41.

[0060] At the same time, the filter plate 41 is held against by the second slide groove 43, and the piston plate 22 continues to move downward. At this time, the annular grinding piece 35 and the concave block 34 are held against by the filter plate 41, and the I-shaped block 33 continues to move downward. The downward movement of the I-shaped block 33 drives the push rod 36 and the rubber protrusion 37 to move downward, and the rubber protrusion 37 moves downward into the filter holes of the filter plate 41 to dredge the impurities blocked in the filter holes of the filter plate 41. The rubber protrusion 37 is elastic, and the rotation of the I-shaped block 33 drives the push rod 36 and the rubber protrusion 37 to rotate, and the rotation of the rubber protrusion 37 can dredge several filter holes on the filter plate 41.

[0061] At the same time, the annular grinding member 35 and the concave block 34 are resisted by the filter plate 41, and the I-shaped block 33 continues to move downward. The I-shaped block 33 moves downward to squeeze and deform the hollow elastic member 39. When the hollow elastic member 39 is deformed and generates elastic force, the softener in the hollow elastic member 39 is squeezed into the push rod 36. The softener in the push rod 36 is sprayed onto the filter plate 41 through the rubber protrusion 37, and the impurities in the filter holes of the filter plate 41 are softened, so as to cooperate with the spray hole 40 to dredge the impurities in the filter holes of the filter plate 41, thereby improving the anti-blocking effect of the cleaning component on the filter plate 41 and preventing impurities in the wastewater from entering the plurality of nozzles 50 and causing blockage of the plurality of nozzles 50.

[0062] Finally, the slide bar 13 moves upward through the two annular plates 25 to drive the piston plate 22 to move upward, and the piston plate 22 moves upward to drive the steam in the air cavity 24 into the air box 63 through the second air pipe 64 and the third one-way valve 65. So that the slide bar 13 moves up and down to drive the piston plate 22 to move up and down, and the steam in the dishwasher 11 is continuously sucked into the air cavity 24, and the steam in the air cavity 24 is squeezed into the air box 63. The wastewater treated by the wastewater processor 20 is continuously drawn into the treatment chamber 23 together with the purifier for stirring and mixing, and then the fully mixed wastewater is squeezed into the disc 49, so that the wastewater is sprayed into the heat exchange cylinder 17 through a plurality of nozzles 50.

[0063] The steam movement route in the dishwasher 11 is as follows: the steam in the dishwasher 11 enters the air cavity 24 through the first air pipe 60 and the second one-way valve 61, and the steam in the air cavity 24 enters the air box 63 through the second air pipe 64 and the third one-way valve 65. At this time, the steam in the air box 63 has the most heat, so as to further perform heat exchange on the tap water with multiple heat exchanges and increase the temperature of the tap water. The steam in the air box 63 enters several second spiral heat exchange pipes 16, and finally the steam in the second spiral heat exchange pipes 16 moves downward and is discharged. At this time, the steam in the lower end of the second spiral heat exchange pipe 16 has the least heat, so as to perform preliminary heat exchange on the tap water that has just entered.

[0064] The wastewater movement route in the dishwasher 11 is that the wastewater enters the wastewater processor 20 for preliminary filtration, and the treated wastewater enters the processing chamber 23. The wastewater in the processing chamber 23 is sprayed into the heat exchange tube 17 through a plurality of nozzles 50. The wastewater in the heat exchange tube 17 moves downward in a spiral through the spiral plate 14. The wastewater moving downward in a spiral enters the wastewater tank 56 for storage through a plurality of drain pipes 55.

[0065] The movement route of tap water is as follows: first, the staff connects the tap water pipe to the spray valve 58, and the spray valve 58 sprays the tap water onto the outer walls of several drain pipes 55 and the outer walls of the lower ends of several second spiral heat exchange pipes 16, so that the tap water flows downward along the outer walls of the drain pipes 55 and the outer walls of the lower ends of the second spiral heat exchange pipes 16 in a film layer, so that the water film of the tap water absorbs the heat of the wastewater in the drain pipes 55 and the heat of the steam in the second spiral heat exchange pipes 16, so as to preheat the tap water and perform a primary membrane layer heat exchange.

[0066] Secondly, the water pump 57 is started to transport the tap water in the water inlet tank 18 to the first spiral heat exchange pipes 15. The tap water moves upward in the heat exchange tube 17 due to the shape of the first spiral heat exchange pipes 15, extending the stroke of the tap water in the heat exchange tube 17. And the steam in the air box 63 moves downward in the spiral due to the shape of the second spiral heat exchange pipes 16, extending the stroke of the steam in the heat exchange tube 17, so that the steam in the second spiral heat exchange pipes 16 can fully contact the tap water in the first spiral heat exchange pipes 15 for heat exchange. Finally, the shape of the spiral plate 14 causes the waste water sprayed from the plurality of nozzles 50 to move downward in a spiral in the heat exchange tube 17, extending the travel of the waste water in the heat exchange tube 17 so as to allow the waste water to fully contact the tap water in the first spiral heat exchange pipe 15 for heat exchange, thereby utilizing the waste water and steam to perform a dual heating effect on the tap water in the first spiral heat exchange pipe 15, thereby improving the heating efficiency of the tap water in the first spiral heat exchange pipe 15 and reasonably recycling the waste heat generated by the dishwasher 11.

[0067] At the same time, the wastewater on the upper side of the spiral plate 14 is blocked by a plurality of baffles 51, so that the wastewater is accumulated on the upper side of the spiral plate 14, so that the outer wall of the first spiral heat exchange pipe 15 is fully in contact with the wastewater, and the contact time and contact area between the wastewater and the tap water in the first spiral heat exchange pipe 15 are increased. The sliding rod 13 moves up and down to drive the spiral plate 14 to move up and down. When the sliding rod 13 moves upward, the amount of wastewater sprayed by the plurality of nozzles 50 is small, the sliding rod 13 moves upward to drive the spiral plate 14 to move upward, and the spiral plate 14 moves upward to drive a plurality of baffles 51 to move upward. The baffles 51 move upward to cooperate with the sliding plate 53 to be resisted by the groove 52, thereby compressing the third spring 54 to generate elastic force. At this time, the height of the sliding plate 53 in the groove 52 is reduced, so that the amount of wastewater blocked by the baffle 51 is small, and the distance between the outer wall of the first spiral heat exchange pipe 15 and the spiral surface of the spiral plate 14 is reduced, which is conducive to using less wastewater to fully contact the outer wall of the first spiral heat exchange pipe 15. When the slide bar 13 moves downward, at this time, the amount of wastewater sprayed by the plurality of nozzles 50 is large, and the downward movement of the slide bar 13 drives the spiral plate 14 and the plurality of baffles 51 to move downward. Under the elastic force of the third spring 54, the slide plate 53 moves upward in the groove 52, so that the upper side of the slide plate 53 is always in contact with the outer wall of the first spiral heat exchange pipe 15. The height of the slide plate 53 in the groove 52 is increased, so that the amount of wastewater blocked by the baffle 51 is large, which is conducive to the full contact between the wastewater and the outer wall of the first spiral heat exchange pipe 15. The spiral plate 14 and the plurality of baffles 51 are driven up and down by the upward and downward movement of the slide bar 13, and the height of the slide plate 53 is adjusted under the elastic force of the third spring 54, so that the amount of wastewater blocked by the baffle 51 can be adjusted according to the amount of wastewater sprayed by the plurality of nozzles 50, so that the wastewater can be fully in contact with the outer wall of the first spiral heat exchange pipe 15, and the efficiency of heat exchange between the wastewater and the tap water in the second spiral heat exchange pipe 16 is improved.

[0068] Next, when the tap water moves upward in the first spiral heat exchange pipe 15 to the bottom of the disc 49, a plurality of nozzles 50 spray out the waste water in the disc 49 so that the waste water flows down along the outer wall of the first spiral heat exchange pipe 15 in a film layer. The tap water in the first spiral heat exchange pipe 15 absorbs the heat of the water film of the waste water so as to perform a secondary membrane heat exchange effect on the tap water.

[0069] Then, the tap water in the first spiral heat exchange pipe 15 enters the water tank 62 , and the tap water in the water tank 62 is further heat-exchanged by the steam in the air box 63 , thereby increasing the temperature of the tap water in the water tank 62 .

[0070] Finally, the tap water in the water tank 62 enters the heating box 67 through the water pipe 66, and the heater 68 is started to heat the tap water in the heating box 67. The heated tap water enters the dishwasher 11 for use.

[0071] The waste heat recovery device based on multi-stage membrane heat exchange of the present invention, through the arrangement of the piston plate 22, the movable plate 32, the I-shaped block 33, and the concave block 34, the piston plate 22 moves upward to pump the wastewater in the wastewater treatment device 20 into the processing chamber 23, and at the same time, the purifier in the purifier box 47 is pumped into the processing chamber 23 through the first one-way valve 48; and the piston plate 22 moves upward to drive the two first sliders 26 to slide in an arc in the two arc-shaped slide grooves 27, and the two arc-shaped slide grooves 27 are connected to each other head to tail, so that the piston plate 22 moves upward and rotates; the rotation of the piston plate 22 drives a plurality of T-shaped sliders 29, the connecting rod 31, and the movable plate 32 to rotate, and the rotation of the movable plate 32 drives a plurality of I-shaped blocks 33 and the concave block 34 to rotate, so as to facilitate the mixing of the wastewater and the purifier in the processing chamber 23, so as to facilitate the softening treatment of impurities in the wastewater, and prevent the impurities in the wastewater from clogging the nozzle 50. By setting the push rod 46 and the annular block 45, under the action of the contact guide between one end of the push rod 46 and the annular block 45 and the elastic force of the first spring 30, the connecting rod 31 can move back and forth horizontally, so as to improve the stirring effect on the wastewater in the treatment chamber 23; and when the filter plate 41 moves to the lowest point and the annular grinding member 35 contacts the upper side of the filter plate 41, the connecting rod 31 moves back and forth horizontally and rotates to drive the movable plate 32, the I-shaped block 33, and the concave block 34 to move back and forth horizontally and rotate, and the concave block 34 moves back and forth horizontally and rotates to match the filter plate 41 to be fixed, so as to grind and crush the impurities on the upper side of the filter plate 41. Then, through the arrangement of the push rod 36 and the rubber protrusion 37, the annular grinding member 35 and the concave block 34 are resisted by the filter plate 41, and the I-shaped block 33 continues to move downward. The downward movement of the I-shaped block 33 drives the push rod 36 and the rubber protrusion 37 to move downward, and the rubber protrusion 37 moves downward into the filter holes of the filter plate 41, so as to dredge the impurities blocked in the filter holes of the filter plate 41; and the rubber protrusion 37 is elastic, and the rotation of the I-shaped block 33 drives the push rod 36 and the rubber protrusion 37 to rotate, and the rotation of the rubber protrusion 37 can dredge a number of filter holes on the filter plate 41, thereby maintaining the filtering effect of the filter plate 41. Finally, through the arrangement of the hollow elastic member 39 and the spray hole 40, the annular grinding member 35 and the concave block 34 are resisted by the filter plate 41, and the I-shaped block 33 continues to move downward. The I-shaped block 33 moves downward to extrude and deform the hollow elastic member 39. When the hollow elastic member 39 is deformed and generates elastic force, the softener in the hollow elastic member 39 is squeezed into the push rod 36. The softener in the push rod 36 is sprayed onto the filter plate 41 through the rubber protrusion 37, and the impurities in the filter holes of the filter plate 41 are softened, so as to cooperate with the spray hole 40 to dredge the impurities in the filter holes of the filter plate 41, thereby improving the anti-blocking effect of the cleaning component on the filter plate 41 and preventing impurities in the wastewater from entering the plurality of nozzles 50 and causing blockage of the plurality of nozzles 50.

[0072] The waste heat recovery equipment based on multi-stage membrane heat exchange of the present invention is configured with a spray valve 58, a drain pipe 55 and a second spiral heat exchange pipe 16. The spray valve 58 sprays tap water onto the outer walls of a number of drain pipes 55 and the outer walls of the lower ends of a number of second spiral heat exchange pipes 16, so that the tap water flows downward along the outer walls of the drain pipes 55 and the outer walls of the lower ends of the second spiral heat exchange pipes 16 in a film layer, so that the water film of the tap water absorbs the heat of the waste water in the drain pipe 55 and the heat of the steam in the second spiral heat exchange pipe 16, so as to preheat the tap water and perform primary membrane heat exchange. Through the arrangement of the nozzles 50, when the tap water moves upward in the first spiral heat exchange pipe 15 to the bottom of the disc 49, a plurality of nozzles 50 spray out the waste water in the disc 49, so that the waste water flows down along the outer wall of the first spiral heat exchange pipe 15 in a film layer, and the tap water in the first spiral heat exchange pipe 15 absorbs the heat of the water film of the waste water, so as to perform a secondary membrane layer heat exchange effect on the tap water, so as to perform a multi-stage membrane layer heat exchange effect on the tap water.

[0073] The waste heat recovery device based on multi-stage membrane heat exchange of the present invention, through the arrangement of the first spiral heat exchange pipe 15, the second spiral heat exchange pipe 16, and the spiral plate 14, through the shape of the first spiral heat exchange pipe 15, the tap water is moved upward in the heat exchange tube 17 in a spiral manner, and the stroke of the tap water in the heat exchange tube 17 is extended. And through the shape of the second spiral heat exchange pipe 16, the steam in the air box 63 is moved downward in a spiral manner, and the stroke of the steam in the heat exchange tube 17 is extended, so that the steam in the second spiral heat exchange pipe 16 can fully contact the tap water in the first spiral heat exchange pipe 15 for heat exchange. The shape of the spiral plate 14 allows the waste water sprayed from the plurality of nozzles 50 to move downward in a spiral in the heat exchange tube 17, extending the travel of the waste water in the heat exchange tube 17, so that the waste water can fully contact the tap water in the first spiral heat exchange pipe 15 for heat exchange, thereby utilizing the waste water and steam to perform internal and external dual heating of the tap water in the first spiral heat exchange pipe 15, improving the efficiency of heating the tap water in the first spiral heat exchange pipe 15, and reasonably recycling the waste heat generated by the dishwasher 11. The baffle 51 is then provided, and the waste water on the upper side of the spiral plate 14 is blocked by the baffles 51, so that the waste water is accumulated on the upper side of the spiral plate 14, so that the outer wall of the first spiral heat exchange pipe 15 is fully in contact with the waste water, increasing the contact time and contact area between the waste water and the tap water in the first spiral heat exchange pipe 15. Finally, through the slide plate 53 and the third spring 54, the slide rod 13 moves up and down, driving the spiral plate 14 and the plurality of baffles 51 to move up and down. The height of the slide plate 53 is adjusted under the elastic force of the third spring 54, so that the amount of wastewater blocked by the baffle 51 can be adjusted according to the amount of wastewater sprayed by the plurality of nozzles 50, so that the wastewater can fully contact the outer wall of the first spiral heat exchange pipe 15, thereby improving the efficiency of heat exchange between the wastewater and the tap water in the second spiral heat exchange pipe 16.

[0074] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A waste heat recovery device based on multi-stage membrane heat exchange, characterized in that: The invention comprises a housing (10), wherein a dishwasher (11) is arranged on the upper side of the housing (10), a water inlet box (18) is arranged on the lower side of the interior of the housing (10), a heat exchange cylinder (17) is arranged on the upper side of the water inlet box (18), a slide rod (13) is slidably arranged inside the heat exchange cylinder (17), a spiral plate (14) is fixedly arranged on the outer side of the slide rod (13), a first spiral heat exchange pipe (15) is fixedly arranged inside the heat exchange cylinder (17), a second spiral heat exchange pipe (16) is fixedly arranged inside the first spiral heat exchange pipe (15), and a plurality of baffles (51) are fixedly arranged on the spiral surface of the spiral plate (14) at intervals, each of the baffles being arranged on a spiral surface of the spiral plate (14). (51) is provided with a groove (52), each of the first spiral heat exchange pipes (15) is located in the groove (52), a fixed plate (19) is fixedly provided on the upper side of the interior of the box body (10), a cylinder (21) is provided in the middle of the upper side of the fixed plate (19), a piston plate (22) is slidably provided inside the cylinder (21), a processing chamber (23) and an air chamber (24) are separated inside the cylinder (21) by the piston plate (22), a plurality of processing components are provided on the lower side of the piston plate (22), a disc (49) is fixedly provided on the lower side of the fixed plate (19), and a plurality of nozzles (50) are provided on the lower side of the disc (49); The processing assembly comprises a movable plate (32), a plurality of I-shaped blocks (33) are fixedly provided on the lower side of the movable plate (32), a concave block (34) is provided on the lower side of each I-shaped block (33), an annular grinding member (35) is fixedly provided on the lower side of each concave block (34), a filter plate (41) is vertically slidably provided inside the processing chamber (23), the lower end of each I-shaped block (33) vertically slides in the concave block (34), a push rod (36) is fixedly provided on the lower end of each I-shaped block (33), and a rubber protrusion (37) is provided on the lower end of each push rod (36).

2. The waste heat recovery device based on multi-stage membrane heat exchange according to claim 1 is characterized in that: A hollow elastic member (39) is interconnected between the lower end of each I-shaped block (33) and the interior of the concave block (34). The interior of the hollow elastic member (39) is interconnected with the interior of the movable plate (32). A softener is installed inside each movable plate (32). The interior of each hollow elastic member (39) is interconnected with the interior of the push rod (36). A spray hole (40) is provided in the middle of each rubber protrusion (37). Each spray hole (40) is interconnected with the interior of the push rod (36). An annular cleaning member (38) is fixedly provided on the inner side of each annular grinding member (35). The inner side of the annular cleaning member (38) is in sliding contact with the outer side of the rubber protrusion (37). The processing chamber (23) is located below the air chamber (24).

3. The waste heat recovery device based on multi-stage membrane heat exchange according to claim 2 is characterized in that: Two first sliding blocks (26) are symmetrically fixed on the outer side of the piston plate (22), and two arc-shaped sliding grooves (27) are symmetrically provided on the inner wall of the processing chamber (23). The two first sliding blocks (26) slide in an arc shape in the two arc-shaped sliding grooves (27) respectively, and the two arc-shaped sliding grooves (27) are connected to each other at the head and tail to form a wave-shaped sliding groove structure. A plurality of first sliding grooves (28) are provided in a circular array at the lower part of the piston plate (22), and a T-shaped sliding block (29) is provided inside each of the first sliding grooves (28) for horizontal sliding, and one side of each T-shaped sliding block (29) A first spring (30) is interconnected between the side and one side of each of the first slide grooves (28), a connecting rod (31) is fixedly provided on the lower side of each of the T-shaped slide blocks (29), and the lower end of each of the connecting rods (31) is fixedly connected to the upper side of the movable plate (32), and a plurality of annular blocks (45) are fixedly provided on the inner wall of the processing chamber (23) at vertical intervals, and a push rod (46) is fixedly provided on the side of each of the connecting rods (31) away from the slide rod (13), and one end of each of the push rods (46) is in sliding contact with the inner side of the annular block (45).

4. The waste heat recovery device based on multi-stage membrane heat exchange according to claim 1 is characterized in that: Two second slide grooves (43) are symmetrically arranged on the inner wall of the processing chamber (23), and two second sliders (42) are vertically slidably arranged inside the two second slide grooves (43). The two second sliders (42) are respectively fixedly connected to the two sides of the two filter plates (41), and a second spring (44) is respectively arranged between the two second sliders (42) and the two second slide grooves (43).

5. The waste heat recovery device based on multi-stage membrane heat exchange according to claim 1 is characterized in that: Two annular plates (25) are fixedly provided at vertical intervals on the outer side of the upper end of the slide rod (13), and the two annular plates (25) are respectively located on the upper and lower sides of the piston plate (22), and the outer side of the slide rod (13) is in sliding contact with the piston plate (22), and the outer side of the slide rod (13) is in sliding contact with the filter plate (41).

6. The waste heat recovery device based on multi-stage membrane heat exchange according to claim 1 is characterized in that: An electric telescopic rod (59) is provided on the lower inner side of the box body (10), and the protruding end of the electric telescopic rod (59) is fixedly connected to the lower end of the slide rod (13). A slide plate (53) is provided inside each groove (52) for vertical sliding. The upper side of the slide plate (53) is in contact with the outer side of the first spiral heat exchange pipe (15), and a third spring (54) is provided between the lower side of the slide plate (53) and the lower side of the groove (52).

7. The waste heat recovery device based on multi-stage membrane heat exchange according to claim 1 is characterized in that: A wastewater treatment device (20), a water tank (62), a heating tank (67), and a purifier tank (47) are provided on the upper side of the fixed plate (19); the interior of the purifier tank (47) is connected to the processing chamber (23) and is provided with a first non-return valve (48); one end of the wastewater treatment device (20) is connected to the interior of the dishwasher (11), and the other end of the wastewater treatment device (20) is connected to the processing chamber (23).

8. The waste heat recovery device based on multi-stage membrane heat exchange according to claim 7 is characterized in that: A water pump (57) is provided inside the water inlet tank (18); one end of each of the first spiral heat exchange pipes (15) is connected to the interior of the water tank (62); the other end of each of the first spiral heat exchange pipes (15) is connected to the water pump (57); the interior of the water tank (62) is connected to the interior of the heating box (67) and is provided with a water pipe (66); and a heater (68) is provided inside the heating box (67).

9. The waste heat recovery device based on multi-stage membrane heat exchange according to claim 7 is characterized in that: The air cavity (24) is connected to the upper side of the interior of the dishwasher (11) and is provided with a first air pipe (60); a second one-way valve (61) is provided inside the first air pipe (60); an air box (63) is fixedly provided inside the water tank (62); a second air pipe (64) is provided inside the air box (63) and is connected to the air cavity (24); a third one-way valve (65) is provided inside the second air pipe (64).

10. The waste heat recovery device based on multi-stage membrane heat exchange according to claim 9, characterized in that: One end of each of the second spiral heat exchange pipes (16) is in communication with the interior of the air box (63), and the other end of each of the second spiral heat exchange pipes (16) passes through the water inlet box (18) and extends to the bottom of the box body (10). A waste water tank (56) is fixedly provided on the lower side of the box body (10). The interior of the heat exchange cylinder (17) is connected to the interior of the waste water tank (56) and is provided with a plurality of drainage pipes (55). The plurality of drainage pipes (55) all pass through the interior of the water inlet box (18), and a spray valve (58) is provided on one side of the water inlet box (18).

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