Counterflow double-channel sewage source heat exchanger

Abstract

The present application relates to sewage heat pump system technical field, specifically to a kind of sewage source heat exchanger of counterflow double channel, including middle shell mechanism, it includes fixedly arranged fixed back plate and slidable front moving plate, the fixed back plate and front moving plate bottom are equipped with lower guide frame, the front moving plate can be translated along lower guide frame, left shell mechanism and right shell mechanism are respectively arranged in the two sides of middle shell mechanism, left heat exchange flow passage is equipped in the left shell mechanism.The present application is separated by front moving plate and left and right shell linkage, to expose wall surface by full split of sewage flow passage, avoid thin wall damage by using mechanical split manual cleaning, solve cleaning blind area and structural damage problem and strengthen heat exchange efficiency by combining counterflow and parallel flow channel design.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage heat pump systems, in particular to a sewage source heat exchanger with reverse flow and double channels. BACKGROUND

[0002] In a sewage source heat pump system, the sewage heat exchanger is the core component for heat exchange between sewage and intermediate fluid. Since sewage often contains solid impurities and suspended solids, the existing technology usually uses a large-width flow channel type heat exchanger to reduce the risk of blockage by increasing the flow channel aperture to allow the dirt to pass directly. However, such heat exchangers still have the following problems in terms of maintenance and cleaning:

[0003] Incomplete deep-seated dirt cleaning: the existing design provides rotatable side doors on both sides of the heat exchanger, and during maintenance, the internal flow channel needs to be flushed with a high-pressure water gun through the opened side doors. However, due to the poor accessibility of the cleaning tool, the high-pressure water flow cannot accurately act on the deep area of the flow channel (especially near the center), resulting in that stubborn dirt (such as calcified deposits and biological sludge) that has been adhered for a long time and caked cannot be completely removed, and the traditional flushing method can only remove loose surface attachments, and has limited effect on block-shaped dirt with high adhesion strength;

[0004] Thin-walled structure vulnerable to impact damage: to improve heat exchange efficiency, the flow channel wall of the heat exchanger is usually designed to be thin. However, during high-pressure water gun flushing, the high-speed jet flow entrains impurities such as mud and particulate matter remaining in the flow channel, and continuous impact on the wall can cause local wear, pits, and even perforation, especially in stress concentration areas such as welds and corners, the damage risk increases significantly. Structural damage caused by mechanical impact can directly affect the service life and operational reliability of the equipment. SUMMARY

[0005] In order to overcome the above technical problems, the purpose of the present application is to provide a sewage source heat exchanger with reverse flow and double channels to solve the problems of the existing sewage heat exchanger that the high-pressure water gun cannot reach the deep area of the flow channel after the side door is opened, the stubborn dirt cannot be completely removed, and the thin-walled structure is vulnerable to impact damage from high-speed jet flow entrained impurities, affecting the service life and reliability of the equipment.

[0006] To achieve the above purpose, the present application provides the following technical solutions:

[0007] A sewage source heat exchanger with reverse flow and double channels, comprising:

[0008] The middle shell mechanism comprises a fixedly arranged back plate and a slidable front plate, the bottom of the back plate and the front plate is provided with a lower guide frame, and the front plate can translate 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, 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 for circulating intermediate liquid; the middle sewage flow channel is formed by the back plate, the front plate, the heat exchange fin one of the left shell mechanism and the heat exchange fin two of the right shell mechanism, and is used for circulating sewage; the adjusting frame mechanism is arranged in two groups and is connected with the left shell mechanism and the right shell mechanism respectively, and is used for driving the two to move transversely to separate or close the middle sewage flow channel; the joint mechanism comprises a joint head one and a joint head two; wherein, the front plate, the left shell mechanism and the right shell mechanism can be linked and separated, so that the middle sewage flow channel is separated to directly clean and maintain the exposed wall surface.

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

[0010] Preferably, the inner wall of the back plate and the front plate of the middle shell mechanism is provided with a convex extension, the convex extension is embedded with a sealing strip, and is used for extruding the heat exchange fin one and the heat exchange fin two to form a seal.

[0011] Preferably, the adjusting frame mechanism comprises a movable frame and a side rail frame, the movable frame is slidingly connected with the side rail frame, the adjusting frame mechanism is provided with two groups of left shell bodies or right shell bodies which are fixedly connected, and the movable frame is driven by an electric telescopic rod, and is used for controlling the transverse displacement of the left shell mechanism and the right shell mechanism.

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

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

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

[0015] Preferably, when the cleaning mode is started, the front plate first moves along the lower guide frame to separate 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 adjusting frame mechanism, so that the middle sewage flow channel is completely separated.

[0016] Preferably, the heat exchange fin one and the heat exchange fin two are respectively welded on the side of the left shell body and the right shell body.

[0017] Preferably, the left and right heat exchange channels are in communication with the intermediate fluid main pipe through a distributor.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] 1. By separating the front moving plate, left shell mechanism and right shell mechanism, the middle sewage channel can be completely disassembled, so that the flow channel wall (including the fixed back plate, front moving plate, heat exchange sheet one and heat exchange sheet two) is completely exposed, completely eliminating the cleaning blind area of the longitudinal area when cleaning the traditional side door. When maintaining, it does not need to rely on a high-pressure water gun, and can directly use a manual tool (such as a scraper, a cleaning brush) to accurately remove stubborn dirt (such as calcified deposits, biological slime), without cleaning dead angles, improving cleaning efficiency and quality;

[0020] 2. Abandoning the high-pressure water gun flushing method, using mechanical disassembly and manual cleaning, avoiding the impact and wear of high-speed jet flow on the thin-walled wall (such as heat exchange sheet one and heat exchange sheet two), fundamentally eliminating the risk of perforation in stress concentration areas such as welds and corners. The heat exchange sheet is welded and fixed to the shell body, and after disassembly, the damaged parts can be directly repaired, reducing maintenance cost;

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

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

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

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

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

[0026] Figure 5 is a schematic diagram of the cross-sectional structure of the lower guide frame part;

[0027] Figure 6 is a schematic diagram of the exploded structure of the middle shell mechanism, left shell mechanism and 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 fin 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 fin two; 4, joint mechanism; 41, joint head one; 42, joint head two; 5, middle sewage flow channel; 6, adjusting frame mechanism; 61, moving frame; 62, side rail frame. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] An embodiment provided by the present application comprises:

[0031] A sewage source heat exchanger with countercurrent double channels comprises:

[0032] Reference Figure 1 and Figure 2 The middle shell mechanism 1 comprises 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 slidingly 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 limiting baffle corresponding to the front moving plate 12. The limiting baffle is used to prevent the front moving plate 12 from being detached from the lower guide frame 13. The inner walls of the front moving plate 12 and the fixed back plate 11 are both provided with a convex extension 14.

[0033] Reference Figure 3 and Figure 4 The left shell mechanism 2 comprises a left shell body 21. The left shell body 21 is internally provided with a left heat exchange flow channel 22 for circulating intermediate liquid. The left shell body 21 is fixedly connected with a heat exchange fin one 23 on the side surface. The left heat exchange flow channel 22 is provided with a left opening one 221 at one end and a left opening two 222 at the other end, which are respectively arranged at the top and the bottom of the left shell body 21.

[0034] Reference Figure 3 and Figure 4Right shell mechanism 3, which comprises right shell body 31, right heat exchange flow channel 32 for circulating intermediate liquid is designed in right shell body 31, heat exchange fin two 33 is fixedly connected to the side of right shell body 31, right opening one 321 of one end of right heat exchange flow channel 32 is arranged at the top position of the side wall of right shell body 31, right opening two 322 of the other end of right heat exchange flow channel 32 is arranged at the bottom position of the side wall of right shell body 31, and the right heat exchange flow channel 32 cooperates with the fixed back plate 11, the front moving plate 12 and the heat exchange fin one 23 to form sewage flow channel 5 for circulating sewage.

[0035] Reference Figures 1-4 Joint mechanism 4, which is provided with two groups of upper and lower joints, the joint mechanism 4 comprises joint head one 41 and joint head two 42, the joint head one 41 and the joint head two 42 are fixedly connected through a support, in the upper group of joint mechanism 4, the joint head one 41 is inserted into one end of the sewage flow channel 5, the other end of the joint head one 41 is used for connecting an external sewage drainage pipe, and the joint head two 42 is inserted into right opening one 321, and the other end of the joint head two 42 is used for connecting an intermediate liquid inlet pipe.

[0036] In the lower group of joint mechanism 4, the joint head one 41 is inserted into one end of the sewage flow channel 5, the other end of the joint head one 41 is used for connecting an external sewage inlet pipe, the joint head two 42 is inserted into right opening two 322, and the other end of the joint head two 42 is used for connecting an intermediate liquid outlet pipe.

[0037] It should be noted that left opening one 221 is connected to an intermediate liquid inlet pipe, and left opening two 222 is connected to an intermediate liquid outlet pipe, wherein an external intermediate liquid drainage pipe is connected to left opening one 221 and right opening one 321 of left heat exchange flow channel 22 and right heat exchange flow channel 32 through a branch pipe, and drainage at left opening two 222 and right opening two 322 flows into an intermediate liquid outlet pipe through a collecting pipe.

[0038] The convex extension 14 is arranged at the edge of heat exchange fin one 23 and heat exchange fin two 33, a rubber strip is arranged in the convex extension 14, the convex extension 14 is used for extruding heat exchange fin two 33 and heat exchange fin one 23 to form sealing, and leakage of sewage in sewage flow channel 5 is avoided.

[0039] Reference Figure 1 And Figure 2Adjusting frame mechanism 6 is provided with two groups, and two groups of adjusting frame mechanism 6 are used to control left shell mechanism 2 and right shell mechanism 3 to move respectively, and adjusting frame mechanism 6 comprises movable frame 61 and side rail frame 62, side rail frame 62 is fixedly connected with lower guide frame 13, movable frame 61 is slidably connected with side rail frame 62, one group of movable frame 61 is fixedly connected with left shell body 21, and the other group of movable frame 61 is fixedly connected with right shell body 31.

[0040] The side of front movable plate 12 is provided with an electric telescopic rod, front movable plate 12 is controlled to slide on lower guide frame 13 through the electric telescopic rod, the side of two groups of movable frame 61 is also provided with an electric telescopic rod, and the electric telescopic rod is used to control left shell mechanism 2 and right shell mechanism 3 to move, and three electric telescopic rods are electrically connected with equipment controller, and each electric telescopic rod can be controlled respectively by operating equipment controller by an operator.

[0041] Working principle:

[0042] When the heat exchange equipment is in a working state, intermediate liquid flows into right heat exchange flow channel 32 of left heat exchange flow channel 22 from left opening one 221 and connecting pipe head two 42, and reference Figure 4 Intermediate liquid flows downwards along left heat exchange flow channel 22 and right heat exchange flow channel 32, and is finally discharged to an intermediate liquid outlet pipe through left opening two 222 and connecting pipe head two 42, sewage enters into middle sewage flow channel 5 through lower connecting pipe head one 41, and flows upwards along middle sewage flow channel 5, and is finally discharged to a sewage drain pipe through higher connecting pipe head one 41, sewage in middle sewage flow channel 5 and intermediate liquid in left heat exchange flow channel 22 and right heat exchange flow channel 32 are heat exchanged through cooperation of heat exchange fin one 23 and heat exchange fin two 33, and the heat exchange effect is achieved.

[0043] In the use after the fixed emotion cleaning maintenance, through the start of the front moving plate 12 electric telescopic rod control front moving plate 12 to the direction of moving away from the fixed back plate 11, at this time the whole side of the sewage flow channel 5 will be opened, and then through the start of two groups of adjusting frame mechanism 6 in the electric telescopic rod, make left shell mechanism 2 and right shell mechanism 3 move, the distance of left shell mechanism 2 and right shell mechanism 3 will be more and more far, and then the middle sewage flow channel 5 will be split, the wall surface in the middle sewage flow channel 5 under the long-term use state will be attached with dirt, and after splitting, the four corners inside it are exposed to the outside, personnel only need to use manual cleaning tools, such as scraper, cleaning brush, etc. can directly avoid dirt cleaning, there is no dead angle problem, improve the maintenance efficiency and maintenance quality of the heat exchanger, at the same time, directly using scraper, cleaning brush and other cleaning tools, the damage to the heat exchange fin 23 and heat exchange fin 33 is small, which will not cause excessive damage to them like high pressure water gun, and because the heat exchange fin 23 and right heat exchange flow channel 32 are welded on the left shell body 21 and right shell body 31, even if the damage occurs, it can be repaired, because the heat exchange fin 23 and right heat exchange flow channel 32 are exposed after splitting, the maintenance and repair liquid is more convenient, if the damage is in the pipeline in the prior art, it cannot be maintained but replaced, therefore, this design can greatly reduce the maintenance cost.

[0044] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics thereof. The presently disclosed embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No limitation is intended to the scope of the claims based on any embodiment illustrated in the drawings.

Claims

1. A counter-current dual-channel wastewater source heat exchanger, characterized in that, include: The middle shell mechanism includes 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 located on both sides of the middle shell mechanism. The left shell mechanism is provided with a left heat exchange channel, and the right shell mechanism is provided with a right heat exchange channel. The left heat exchange channel and the right heat exchange channel are used to flow the intermediate liquid. The sewage flow channel is formed by the fixed back plate, the front moving plate, the heat exchange plate one of the left shell mechanism and the heat exchange plate two of the right shell mechanism, and is used to circulate sewage. The regulating frame mechanism is provided in two sets, 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 sewage flow channel. The connector mechanism includes a first connector and a second connector; wherein the front moving plate, the left housing mechanism and the right housing mechanism can be linked and separated to split the sewage flow channel for direct cleaning and maintenance of the exposed wall surface.

2. The counter-current dual-channel wastewater source heat exchanger according to claim 1, characterized in that: The connector mechanism is provided in two sets, high and low. In the higher set, connector head one and connector head two are respectively connected to the outlet of the middle sewage flow channel and the right opening one of the right heat exchange flow channel. In the lower set, connector head one and connector head two are respectively connected to the inlet of the middle sewage flow channel and the right opening two of the right heat exchange flow channel.

3. A counter-current dual-channel wastewater 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 protrusions, and the protrusions are embedded with sealing strips to compress heat exchange plate one and heat exchange plate two to form a seal.

4. A counter-current dual-channel wastewater source heat exchanger according to claim 1, characterized in that: The adjustment frame mechanism includes a moving frame and a side rail frame. The moving frame is slidably connected to the side rail frame. The adjustment frame mechanism has two sets of components that are respectively fixedly connected to the left shell or the right shell. The moving frame is driven by an electric telescopic rod and is used to control the lateral displacement of the left shell mechanism and the right shell mechanism.

5. A counter-current dual-channel wastewater source heat exchanger according to claim 1, characterized in that: The front movable plate is driven to move along the lower guide frame by an electric telescopic rod, and the lower guide frame is provided with a limiting baffle to prevent the front movable plate from falling out.

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

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

8. A counter-current dual-channel wastewater source heat exchanger according to claim 1, characterized in that: When the cleaning mode is activated, the front moving plate first moves along the lower guide frame to separate the side of the middle sewage flow channel. Then, the left and right housing mechanisms move in opposite directions through the adjusting frame mechanism, so that the middle sewage flow channel is completely separated.

9. A counter-current dual-channel wastewater source heat exchanger according to claim 1, characterized in that: The heat exchange plate one and the heat exchange plate two are respectively welded to the left and right sides of the shell.

10. A counter-current dual-channel wastewater source heat exchanger according to claim 1, characterized in that: The left and right heat exchange channels are connected to the intermediate liquid main pipe via a manifold.

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