Sewage source heat exchanger with two countercurrent channels

Abstract

The invention relates to the technical field of sewage heat pump systems, in particular to a countercurrent double-channel sewage source heat exchanger which comprises a middle shell mechanism, a left shell mechanism and a right shell mechanism, the middle shell mechanism comprises a fixed back plate fixedly arranged and a front movable plate capable of sliding, a lower guide frame is arranged at the bottom of the fixed back plate and the bottom of the front movable plate, and the front movable plate can horizontally move along the lower guide frame. The left shell mechanism and the right shell mechanism are arranged on the two sides of the middle shell mechanism correspondingly. The front movable plate is linked and separated from the left shell and the right shell to realize full splitting of a middle sewage flow channel so as to expose a wall surface, thin-wall damage is avoided by adopting mechanical splitting and manual cleaning, and the problems of cleaning blind areas and structural damage are solved and the heat exchange efficiency is enhanced by combining countercurrent and parallel flow channel design.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage heat pump systems, in particular to a countercurrent dual-channel sewage source heat exchanger. Background Art

[0002] In a sewage-source heat pump system, the sewage heat exchanger is the core component for heat exchange between sewage and the intermediate fluid. Because sewage often contains solid impurities and suspended matter, existing technologies typically use wide-channel heat exchangers. By increasing the channel aperture, these channels allow for direct passage of impurities, reducing the risk of clogging. However, these heat exchangers still present the following challenges regarding maintenance and cleaning:

[0003] Incomplete cleaning of deep-seated dirt: The existing design features swingable side doors on both sides of the heat exchanger. Maintenance requires high-pressure water jets to be used to flush the internal flow channels. However, due to poor accessibility of cleaning tools in the deep areas of the flow channels (especially near the center), high-pressure water jets are difficult to accurately apply. This results in the inability to completely remove stubborn dirt (such as calcified deposits and biological slime) that has long adhered and agglomerated. Traditional flushing methods can only remove loose surface deposits and have limited effectiveness against strongly adhered, lumpy dirt.

[0004] Thin-walled structures are susceptible to impact damage: To improve heat exchange efficiency, the walls of heat exchanger flow channels are usually designed to be thinner. However, when flushed with a high-pressure water gun, the high-speed jet entrains impurities such as mud, sand, and particles remaining in the flow channel. The continuous impact on the wall can cause local wear, pitting, and even perforation. This is especially true in stress concentration areas such as welds and corners, where the risk of damage increases significantly. The structural damage caused by this mechanical impact will directly affect the service life and operational reliability of the equipment. Summary of the Invention

[0005] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a countercurrent dual-channel sewage source heat exchanger to solve the problems of the existing sewage heat exchanger proposed in the above-mentioned background technology, such as the high-pressure water gun is difficult to reach the deep area of ​​the flow channel after the side door is opened, the stubborn dirt is not completely removed, and the thin-wall structure is easily damaged by the impact of impurities entrained by the high-speed jet, which affects the life and reliability of the equipment.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A countercurrent dual-channel sewage source heat exchanger, comprising:

[0008] The middle shell mechanism comprises a fixed back plate and a slidable front moving plate, the bottom of the fixed back plate and the front moving plate are provided with a lower guide frame, and the front moving plate can be translated along the lower guide frame; the left shell mechanism and the right shell mechanism are respectively arranged on both sides of the middle shell mechanism, the left shell mechanism is provided with a left heat exchange flow channel, and the right shell mechanism is provided with a right heat exchange flow channel, and the left heat exchange flow channel and the right heat exchange flow channel are used for circulating the intermediate liquid; the middle sewage flow channel is formed by the fixed back plate, the front moving plate, the heat exchange plate 1 of the left shell mechanism and the heat exchange plate 2 of the right shell mechanism, and is used for circulating sewage; the adjustment frame mechanism is provided with two groups, which are respectively connected to the left shell mechanism and the right shell mechanism, and are used to drive the two to move laterally to separate or close the middle sewage flow channel; the joint mechanism comprises a connecting head 1 and a connecting head 2; wherein, the front moving plate, the left shell mechanism and the right shell mechanism can be separated in a linked manner to split the middle sewage flow channel for directly cleaning and maintaining the exposed wall surface.

[0009] Preferably, the joint mechanism is provided with two groups, one high and one low. The joint head 1 and the joint head 2 in the higher group of the joint mechanism are respectively connected to the outlet of the middle sewage flow channel and the right opening 1 of the right heat exchange flow channel; the joint head 1 and the joint head 2 in the lower group of the joint mechanism are respectively connected to the inlet of the middle sewage flow channel and the right opening 2 of the right heat exchange flow channel.

[0010] Preferably, the inner walls of the fixed back plate and the front moving plate of the middle shell mechanism are provided with projections, and the projections are embedded with sealing strips for squeezing the first heat exchange plate and the second heat exchange plate to form a seal.

[0011] Preferably, the adjustment frame mechanism includes a movable frame and a side track frame, the movable frame is slidably connected to the side track frame, the adjustment frame mechanism is provided with two groups fixedly connected to the left shell body or the right shell body respectively, the movable frame is driven by an electric telescopic rod to control the lateral displacement of the left shell body mechanism and the right shell body mechanism.

[0012] Preferably, the front moving plate is driven by an electric telescopic rod to translate along the lower guide frame, and the lower guide frame is provided with a limit baffle to prevent the front moving plate from falling out.

[0013] Preferably, the medium flow direction of the left heat exchange channel and the medium flow direction of the right heat exchange channel are arranged in parallel, and both form countercurrent heat exchange with the medium flow direction of the middle sewage channel.

[0014] Preferably, the electric telescopic rods of the front moving plate, the left housing mechanism and the right housing mechanism are all electrically connected to the central controller.

[0015] Preferably, when the cleaning mode is turned on, the front moving plate first moves along the lower guide frame to split the side of the middle sewage flow channel, and then the left shell mechanism and the right shell mechanism move away from each other through the adjustment frame mechanism, so that the middle sewage flow channel is completely split.

[0016] Preferably, the first heat exchange plate and the second heat exchange plate are welded to the side surfaces of the left shell and the right shell respectively.

[0017] Preferably, the left heat exchange channel and the right heat exchange channel are connected to the intermediate liquid main pipe through a pipe divider.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By separating the front moving plate, left shell mechanism, and right shell mechanism, the middle sewage channel can be completely disassembled, exposing the channel walls (including the fixed back plate, front moving plate, heat exchanger plate 1 and heat exchanger plate 2), completely eliminating the blind spots in the deep cleaning area during traditional side door cleaning. Maintenance eliminates the need to rely on high-pressure water guns; manual tools (such as scrapers and cleaning brushes) can be used directly to accurately remove stubborn dirt (such as calcified deposits and biological slime), eliminating blind spots and improving cleaning efficiency and quality.

[0020] 2. Abandon high-pressure water gun flushing and adopt manual cleaning after mechanical disassembly to avoid the impact and wear of impurities carried by high-speed jets on thin-walled surfaces (such as heat exchanger 1 and heat exchanger 2), fundamentally eliminating the risk of perforation in stress concentration areas such as welds and corners. The heat exchanger is welded to the shell, and damaged parts can be directly inspected after disassembly, reducing maintenance costs.

[0021] 3. The left and right heat exchange channels and the middle sewage channel are arranged in a countercurrent manner. At the same time, the two heat exchange channels operate in parallel, which not only maximizes the temperature difference driving force between the media through countercurrent, but also expands the heat exchange contact area through parallel connection, significantly improving the efficiency and adequacy of heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall front structure;

[0023] Figure 2 It is a schematic diagram of the overall back structure;

[0024] Figure 3 It is a structural diagram of the middle shell mechanism, the left shell mechanism and the right shell mechanism;

[0025] Figure 4 It is a schematic cross-sectional view of the middle shell mechanism, the left shell mechanism and the right shell mechanism;

[0026] Figure 5 Schematic diagram of the cross-sectional structure of the lower guide frame;

[0027] Figure 6 It is a schematic diagram of the exploded structure of the middle shell mechanism, the left shell mechanism and the right shell mechanism.

[0028] In the figure: 1. middle shell mechanism; 11. fixed back plate; 12. front moving plate; 13. lower guide frame; 14. convex extension; 2. left shell mechanism; 21. left shell body; 22. left heat exchange flow channel; 221. left opening one; 222. left opening two; 23. heat exchange plate one; 3. right shell mechanism; 31. right shell body; 32. right heat exchange flow channel; 321. right opening one; 322. right opening two; 33. heat exchange plate two; 4. joint mechanism; 41. pipe head one; 42. pipe head two; 5. middle sewage flow channel; 6. adjustment frame mechanism; 61. moving frame; 62. side track frame. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] An embodiment provided by the present invention:

[0031] A countercurrent dual-channel sewage source heat exchanger, comprising:

[0032] refer to Figure 1 and Figure 2 , the middle shell mechanism 1, the middle shell mechanism 1 includes a fixed back plate 11 and a front moving plate 12, the bottom of the fixed back plate 11 and the front moving plate 12 is provided with a lower guide frame 13, the fixed back plate 11 is fixedly connected to the lower guide frame 13, the front moving plate 12 is slidably connected to the top of the lower guide frame 13, the lower guide frame 13 is in contact with the ground, the lower guide frame 13 is provided with a limit baffle corresponding to the front moving plate 12, the limit baffle is used to prevent the fixed back plate 11 from falling off from the lower guide frame 13, the inner walls of the front moving plate 12 and the fixed back plate 11 are provided with a protrusion 14.

[0033] refer to Figure 3 and Figure 4 , the left shell mechanism 2, the left shell mechanism 2 includes a left shell body 21, a left heat exchange channel 22 for circulating the intermediate liquid is provided in the left shell body 21, a heat exchange plate 23 is fixedly connected to the side of the left shell body 21, a left opening 1 221 at one end of the left heat exchange channel 22 is opened at the top of the left shell body 21, and a left opening 222 at the other end of the left heat exchange channel 22 is opened at the bottom of the left shell body 21.

[0034] refer to Figure 3 and Figure 4The right housing mechanism 3 includes a right shell 31, within which is designed a right heat exchange channel 32 for circulating an intermediate fluid. A second heat exchange fin 33 is fixedly connected to the side of the right shell 31. One end of the right heat exchange channel 32 has a right opening 321 located near the top of the side wall of the right shell 31, while the other end has a right opening 322 located near the bottom of the side wall of the right shell 31. The fixed back plate 11, front moving plate 12, heat exchange fin 1, and right heat exchange channel 32 cooperate to form a medium sewage channel 5 for circulating sewage.

[0035] refer to Figure 1-Figure 4 , joint mechanism 4, the joint mechanism 4 is provided with two groups, the joint mechanism 4 includes a connecting head 1 41 and a connecting head 2 42, the connecting head 1 41 and the connecting head 2 42 are fixedly connected by a bracket, in the upper group of joint mechanisms 4, one end of the connecting head 1 41 is inserted into one end of the sewage flow channel 5, and the other end of the connecting head 1 41 is used to connect the external sewage drain pipe, one end of the connecting head 2 42 is inserted into the right opening 1 321, and the other end of the connecting head 2 42 is used to connect the water inlet pipe of the intermediate liquid.

[0036] In the lower group of joint mechanisms 4, one end of the connecting head 1 41 is inserted into one end of the middle sewage flow channel 5, and the other end of the connecting head 1 41 is used to connect to the external sewage inlet pipe. One end of the connecting head 2 42 is inserted into the right opening 2 322, and the other end of the connecting head 2 42 is used to connect to the outlet pipe of the intermediate liquid.

[0037] It should be noted that the left opening 1 221 is connected to the intermediate liquid inlet pipe, and the left opening 222 is connected to the intermediate liquid outlet pipe, wherein the external intermediate liquid drain pipe is respectively connected to the left opening 1 221 and the right opening 1 321 of the left heat exchange channel 22 and the right heat exchange channel 32 through a manifold, and the drainage at the left opening 222 and the right opening 2 322 will flow into an intermediate liquid outlet pipe through a manifold.

[0038] The convex extension 14 is set corresponding to the edge of the heat exchange plate 1 23 and the heat exchange plate 2 33. A rubber strip is installed inside the convex extension 14. The convex extension 14 squeezes the heat exchange plate 2 33 and the heat exchange plate 1 23 to form a seal to prevent sewage leakage in the sewage flow channel 5.

[0039] refer to Figure 1 and Figure 2, an adjusting frame mechanism 6, the adjusting frame mechanism 6 is provided with two groups, and the two groups of adjusting frame mechanisms 6 are used to respectively control the movement of the left shell mechanism 2 and the right shell mechanism 3, the adjusting frame mechanism 6 includes a movable frame 61 and a side track frame 62, the side track frame 62 and the lower guide frame 13 are fixedly connected, the movable frame 61 is slidably connected to the side track frame 62, one group of the movable frames 61 is fixedly connected to the left shell body 21, and the other group of the movable frames 61 is fixedly connected to the right shell body 31.

[0040] An electric telescopic rod is provided on the side of the front moving plate 12, which controls the front moving plate 12 to slide on the lower guide frame 13. Electric telescopic rods are also installed on the sides of the two sets of moving frames 61 to control the movement of the left shell mechanism 2 and the right shell mechanism 3. The three electric telescopic rods are electrically connected to the equipment controller, and the operator can control each electric telescopic rod separately by operating the equipment controller.

[0041] Working principle:

[0042] When the heat exchange device is in working state, the intermediate liquid flows from the left opening 221 and the second pipe head 42 into the right heat exchange channel 32 of the left heat exchange channel 22. Figure 4 The intermediate liquid will flow downward along the left heat exchange channel 22 and the right heat exchange channel 32, and will eventually be discharged to the intermediate liquid outlet pipe through the left opening 222 and the second connecting pipe head 42, while the sewage will enter the middle sewage channel 5 through the lower group of connecting pipe heads 1 41, and will flow upward along the middle sewage channel 5, and will eventually be discharged to the sewage drain pipe through the higher group of connecting pipe heads 1 41. The sewage in the sewage channel 5 and the intermediate liquid in the left heat exchange channel 22 and the right heat exchange channel 32 will undergo heat exchange through the cooperation of the heat exchange plate 1 23 and the heat exchange plate 2 33, thereby achieving the effect of heat exchange.

[0043] During cleaning and maintenance after use, the electric telescopic rod of the front moving plate 12 is activated to control the front moving plate 12 to move in the direction away from the fixed back plate 11. At this time, the side of the overall sewage flow channel 5 will be opened, and then the electric telescopic rods in the two sets of adjustment frame mechanisms 6 are activated to move the left shell mechanism 2 and the right shell mechanism 3. The distance between the left shell mechanism 2 and the right shell mechanism 3 will become farther and farther, and then the sewage flow channel 5 will be split apart. Dirt will adhere to the wall surface of the sewage flow channel 5 in a long-term use state. After the splitting, the four corners inside are exposed to the outside. Personnel only need to use manual cleaning tools, such as scrapers, cleaning brushes, etc. to directly clean the dirt. , there is no dead angle problem, which improves the maintenance efficiency and quality of the heat exchanger. At the same time, directly using cleaning tools such as scrapers and cleaning brushes will cause less damage to the heat exchange plate 1 23 and the heat exchange plate 2 33, and will not cause excessive damage to them like a high-pressure water gun. Moreover, since the heat exchange plate 1 23 and the right heat exchange channel 32 are welded to the left shell 21 and the right shell 31, even if damage occurs, it can be repaired. Since the heat exchange plate 1 23 and the right heat exchange channel 32 are exposed to the outside after disassembly, maintenance and repair fluid are more convenient. In the existing technology, if the damage is inside the pipeline, it will not be possible to maintain it and can only be replaced. Therefore, this design can greatly reduce maintenance costs.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A countercurrent dual-channel sewage source heat exchanger, characterized in that: include: The middle shell mechanism includes a fixed back plate and a slidable front movable plate. A lower guide frame is provided at the bottom of the fixed back plate and the front movable plate, and the front movable plate can translate along the lower guide frame. The left shell mechanism and the right shell mechanism are respectively arranged on both sides of the middle shell mechanism. The left shell mechanism is provided with a left heat exchange flow channel, and the right shell mechanism is provided with a right heat exchange flow channel. The left heat exchange flow channel and the right heat exchange flow channel are used to circulate the intermediate liquid; The middle sewage flow channel is formed by the fixed back plate, the front moving plate, the heat exchange plate 1 of the left shell mechanism and the heat exchange plate 2 of the right shell mechanism, and is used for circulating sewage; The regulating frame mechanism is provided with two groups, connected to the left shell mechanism and the right shell mechanism respectively, and is used to drive the two to move laterally to separate or close the sewage flow channel; The joint mechanism includes a joint head 1 and a joint head 2; wherein the front moving plate, the left shell mechanism and the right shell mechanism can be separated in a linked manner, so that the sewage flow channel is split to directly clean and maintain the exposed wall surface.

2. The countercurrent dual-channel sewage source heat exchanger according to claim 1, characterized in that: The joint mechanism is provided with two groups, one high and one low. In the higher group of joint mechanisms, the joint head 1 and the joint head 2 are respectively connected to the outlet of the middle sewage flow channel and the right opening 1 of the right heat exchange flow channel; the joint head 1 and the joint head 2 in the lower group of joint mechanisms are respectively connected to the inlet of the middle sewage flow channel and the right opening 2 of the right heat exchange flow channel.

3. The countercurrent dual-channel sewage source heat exchanger according to claim 1, characterized in that: The inner walls of the fixed back plate and the front moving plate of the middle shell mechanism are provided with convex extensions, and the convex extensions are embedded with sealing strips for squeezing the first heat exchange plate and the second heat exchange plate to form a seal.

4. The countercurrent dual-channel sewage source heat exchanger according to claim 1, characterized in that: The adjustment frame mechanism includes a movable frame and a side track frame. The movable frame is slidably connected to the side track frame. The adjustment frame mechanism is provided with two groups fixedly connected to the left shell body or the right shell body respectively. The movable frame is driven by an electric telescopic rod to control the lateral displacement of the left shell body mechanism and the right shell body mechanism.

5. The countercurrent dual-channel sewage source heat exchanger according to claim 1, characterized in that: The front moving plate is driven by an electric telescopic rod to translate along the lower guide frame, and the lower guide frame is provided with a limit baffle to prevent the front moving plate from falling out.

6. The countercurrent dual-channel sewage source heat exchanger according to claim 1, characterized in that: The medium flow direction of the left heat exchange channel and the medium flow direction of the right heat exchange channel are arranged in parallel, and both form countercurrent heat exchange with the medium flow direction of the middle sewage channel.

7. The countercurrent dual-channel sewage source heat exchanger according to claim 1, characterized in that: The electric telescopic rods of the front moving plate, the left shell mechanism and the right shell mechanism are all electrically connected to the central controller.

8. The countercurrent dual-channel sewage source heat exchanger according to claim 1, characterized in that: When the cleaning mode is turned on, the front moving plate first moves along the lower guide frame to split the side of the middle sewage flow channel, and then the left shell mechanism and the right shell mechanism move oppositely through the adjustment frame mechanism, so that the middle sewage flow channel is completely split.

9. The countercurrent dual-channel sewage source heat exchanger according to claim 1, characterized in that: The first heat exchange plate and the second heat exchange plate are welded to the side surfaces of the left shell and the right shell respectively.

10. The countercurrent dual-channel sewage source heat exchanger according to claim 1, characterized in that: The left heat exchange channel and the right heat exchange channel are connected to the intermediate liquid main pipe through a pipe divider.

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