A heat exchanger flushing detection device and a plate heat exchanger backflush system

Abstract

The utility model relates to the technical field of heat exchanger especially relates to a heat exchanger flushing detection device and plate heat exchanger backflush system, including first detection piece, second detection piece, control unit and alarm unit, first detection piece sets up in good water inlet pipeline, second detection piece sets up in good water outlet pipeline, first detection piece and second detection piece are connected with control unit electricity respectively, alarm unit is connected with control unit, through first detection piece and second detection piece detect the liquid conductivity in good water inlet pipeline and good water outlet pipeline respectively, and data transmission in control unit, thereby judge whether there is sewage to enter good water pipeline, when the pollution appears, through alarm unit sends out the alarm, reminds the staff to overhaul, has relieved the existing technology heat exchanger to remove and clean after, possibly perforation phenomenon, leads to waste water pipeline leak in good water pipeline, causes the technical problem of the pollution of good water pipeline.

Description

Technical Field

[0001] This utility model relates to the technical field of heat exchangers, and in particular to a heat exchanger flushing and detection device and a plate heat exchanger backflushing system. Background Technology

[0002] Plate heat exchangers, as a highly efficient and energy-saving product, have been widely used in various industrial fields such as chemical, machinery, and power. In recent years, their promotion in the district heating and combined heat and power industries has been particularly rapid. With increased flushing time, some waste acid water heat exchangers accumulate deposits during the waste acid water heat exchange process, requiring periodic backflushing and alkaline washing.

[0003] Currently, existing plate heat exchangers generally have good water pipelines and wastewater pipelines. The good water pipelines and wastewater pipelines are set up in parallel for heat exchange, while the wastewater pipelines are generally equipped with a backflushing device. The backflushing device includes an alkaline washing component, which can reverse the flow of alkaline washing liquid into the wastewater pipeline to clean it.

[0004] However, after the heat exchanger is disassembled, inspected, and cleaned, perforations may occur, causing wastewater to leak into the clean water pipeline and contaminating the clean water pipeline. Utility Model Content

[0005] The purpose of this utility model is to provide a heat exchanger flushing and testing device and a plate heat exchanger backflushing system to solve the technical problem in the prior art that after the heat exchanger is disassembled and cleaned, it may be perforated, causing the wastewater pipeline to leak into the good water pipeline and causing pollution to the good water pipeline.

[0006] In the first aspect, the present invention provides a heat exchanger flushing detection device, which is applied to a plate heat exchanger and includes a first detection element, a second detection element, a control unit, and an alarm unit.

[0007] The first detection element is installed in the good water inlet pipe of the plate heat exchanger to detect the liquid conductivity in the good water inlet pipe. The second detection element is installed in the good water outlet pipe of the plate heat exchanger to detect the liquid conductivity in the good water outlet pipe. The first detection element and the second detection element are electrically connected to the control unit, and the alarm unit is connected to the control unit.

[0008] Furthermore, the heat exchanger flushing detection device also includes a third detection element, a fourth detection element, a fifth detection element, and a sixth detection element. The third detection element is installed in the good water inlet pipe of the plate heat exchanger to detect the temperature in the good water inlet pipe. The fourth detection element is installed in the good water outlet pipe of the plate heat exchanger to detect the temperature in the good water outlet pipe. The third and fourth detection elements are electrically connected to the control unit.

[0009] The fifth detection element is installed in the good water inlet pipe of the plate heat exchanger to detect the pressure in the good water inlet pipe. The sixth detection element is installed in the good water outlet pipe of the plate heat exchanger to detect the pressure in the good water outlet pipe. The fifth and sixth detection elements are electrically connected to the control unit.

[0010] Furthermore, the heat exchanger flushing detection device also includes a seventh detection element, which is used in the good water inlet pipe of the plate heat exchanger to detect the flow rate in the good water inlet pipe. The seventh detection element is electrically connected to the control unit.

[0011] Furthermore, the heat exchanger flushing detection device also includes a ninth detection element and a tenth detection element;

[0012] The ninth detection element is installed in the wastewater inlet pipe of the plate heat exchanger to detect the water pressure in the wastewater inlet pipe. The tenth detection element is installed in the wastewater outlet pipe of the plate heat exchanger to detect the water pressure in the wastewater outlet pipe. The ninth and tenth detection elements are electrically connected to the control unit.

[0013] Furthermore, the heat exchanger flushing detection device also includes an eleventh detection element, a twelfth detection element, and a thirteenth detector;

[0014] The eleventh detection element is installed in the wastewater inlet pipe of the plate heat exchanger to detect the temperature of the wastewater inlet pipe. The twelfth detection element is installed in the wastewater outlet pipe of the plate heat exchanger to detect the temperature of the wastewater outlet pipe. The eleventh and twelfth detection elements are electrically connected to the control unit.

[0015] The thirteenth detection element is used in the wastewater inlet pipe of the plate heat exchanger to detect the flow rate of the wastewater inlet pipe. The control unit is electrically connected to the thirteenth detection element.

[0016] Secondly, this utility model also provides a plate heat exchanger backflushing system, including the wastewater inlet pipe, the wastewater outlet pipe, the good water inlet pipe, the good water outlet pipe, the backflushing inlet pipe, the backflushing outlet pipe, the alkaline washing solution supply assembly, and the heat exchanger flushing and detection device mentioned above.

[0017] The wastewater inlet pipe and the wastewater outlet pipe are connected to form a wastewater pipe, the good water inlet pipe and the good water outlet pipe are connected to form a good water pipe, the wastewater pipe and the good water pipe are arranged in parallel, the wastewater inlet pipe is connected to the backwash outlet pipe, the wastewater outlet pipe is connected to the backwash inlet pipe, and the alkaline washing solution supply component is connected to the backwash inlet pipe.

[0018] Furthermore, the alkaline washing solution supply assembly includes a water supply pipeline, an alkali supply pipeline, an alkali water tank, and a rinsing pump;

[0019] The water supply pipeline and the alkali supply pipeline are respectively connected to the alkali water tank, and the two flushing pumps are arranged in parallel between the alkali water tank and the backwash water inlet pipeline.

[0020] Furthermore, the heat exchanger flushing detection device also includes a pH meter, which is installed in the alkaline water tank and connected to the control unit.

[0021] Compared with the prior art, the present invention provides a heat exchanger flushing and detection device, including a first detection element, a second detection element, a control unit, and an alarm unit. The first detection element is used in the good water inlet pipe of the plate heat exchanger to detect the liquid conductivity in the good water inlet pipe. The second detection element is used in the good water outlet pipe of the plate heat exchanger to detect the liquid conductivity in the good water outlet pipe. The first and second detection elements are electrically connected to the control unit, and the alarm unit is connected to the control unit. By detecting the liquid conductivity in the good water inlet pipe and the good water outlet pipe respectively by the first and second detection elements and transmitting the data to the control unit, it is determined whether sewage has entered the good water pipe. When contamination occurs, the alarm unit issues an alarm to remind the staff to carry out maintenance, which alleviates the technical problem in the prior art where perforation may occur after the heat exchanger is disassembled and cleaned, resulting in wastewater leakage into the good water pipe and causing contamination of the good water pipe. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the heat exchanger flushing and detection device provided in the embodiment of this utility model;

[0024] Figure 2This is a schematic diagram of the backflush system of the plate heat exchanger provided in the embodiment of this utility model.

[0025] Figure label:

[0026] 110, First inspection piece; 120, Third inspection piece; 130, Fifth inspection piece; 140, Seventh inspection piece; 210, Second inspection piece; 220, Fourth inspection piece; 230, Sixth inspection piece;

[0027] 300. Control unit; 400. Alarm unit;

[0028] 510, Ninth Inspection Item; 520, Eleventh Inspection Item; 530, Thirteenth Inspection Item; 610, Tenth Inspection Item; 620, Twelfth Inspection Item;

[0029] 101. Good water inlet pipe; 102. Good water outlet pipe; 103. Wastewater inlet pipe; 104. Wastewater outlet pipe; 105. Backflushing inlet pipe; 106. Backflushing outlet pipe;

[0030] 700. Alkali washing supply components; 710. Water supply pipeline; 720. Alkali supply pipeline; 730. Alkali water tank; 740. Flushing pump;

[0031] 800, pH meter. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] Example 1

[0040] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a heat exchanger flushing detection device applied to a plate heat exchanger, including a first detection element 110, a second detection element 210, a control unit, and an alarm unit 400; the first detection element 110 is used to install in the good water inlet pipe 101 of the plate heat exchanger to detect the liquid conductivity in the good water inlet pipe 101, and the second detection element 210 is used to install in the good water outlet pipe 102 of the plate heat exchanger to detect the liquid conductivity in the good water outlet pipe 102. The first detection element 110 and the second detection element 210 are respectively electrically connected to the control unit, and the alarm unit 400 is connected to the control unit.

[0041] That is, the heat exchanger flushing detection device provided in this utility model embodiment detects the liquid conductivity in the good water inlet pipe 101 and the good water outlet pipe 102 respectively through the first detection element 110 and the second detection element 210, and transmits the data to the control unit to determine whether sewage has entered the good water pipe. When pollution occurs, an alarm is issued through the alarm unit 400 to remind the staff to carry out maintenance, which alleviates the technical problem in the prior art that the heat exchanger may be perforated after disassembly and cleaning, resulting in the leakage of wastewater pipe into the good water pipe and causing pollution of the good water pipe.

[0042] Specifically, in this embodiment, the first detection element 110 is specifically configured as a remote conductivity meter, and the second detection element 210 is specifically configured as a remote conductivity meter. They are fixed to the good water inlet pipe 101 and the good water outlet pipe 102 respectively through mounting holes and connected to the control unit via wires. Since sewage entering the good water pipe can cause a change in the liquid conductivity in the good water pipe, the first detection element 110 and the second detection element 210 respectively detect the liquid conductivity in the good water inlet pipe 101 and the good water outlet pipe 102, and transmit the data to the control unit. The control unit compares the liquid conductivity in the two good water inlet pipes 101 and 102 to determine whether sewage has entered the good water pipe, thus promptly detecting heat exchanger leaks. When a heat exchanger leak is detected, an alarm is issued through the alarm unit 400, thereby reducing contamination on the good water side. In this embodiment, the alarm unit 400 is specifically configured as an alarm light and an alarm bell.

[0043] Furthermore, the heat exchanger flushing detection device also includes a third detection element 120, a fourth detection element 220, a fifth detection element 130, and a sixth detection element 230. The third detection element 120 is installed in the good water inlet pipe 101 of the plate heat exchanger to detect the temperature in the good water inlet pipe 101. The fourth detection element 220 is installed in the good water outlet pipe 102 of the plate heat exchanger to detect the temperature in the good water outlet pipe 102. The third detection element 120 and the fourth detection element 220 are electrically connected to the control unit. The fifth detection element 130 is installed in the good water inlet pipe 101 of the plate heat exchanger to detect the pressure in the good water inlet pipe 101. The sixth detection element 230 is installed in the good water outlet pipe 102 of the plate heat exchanger to detect the pressure in the good water outlet pipe 102. The fifth detection element 130 and the sixth detection element 230 are electrically connected to the control unit.

[0044] Specifically, the third detection element 120 and the fourth detection element 220 are both temperature sensors, fixed to the good water inlet pipe 101 and the good water outlet pipe 102 respectively through mounting holes, and connected to the control unit via wires. The fifth detection element 130 and the sixth detection element 230 are both pressure sensors, fixed to the good water inlet pipe 101 and the good water outlet pipe 102 respectively through mounting holes, and connected to the control unit via wires. Thus, the third detection element 120 and the fourth detection element 220 can detect temperature changes in the good water pipes, while the fifth detection element 130 and the sixth detection element 230 can detect water pressure changes in the good water pipes. The temperature and water pressure change data are transmitted to the control unit, which compares the data with the heat exchanger's operating calibration data to verify the leak detection results determined by liquid conductivity, thereby improving the detection accuracy of the heat exchanger flushing detection device.

[0045] Furthermore, the heat exchanger flushing detection device also includes a seventh detection element 140, which is used in the good water inlet pipe 101 of the plate heat exchanger to detect the flow rate in the good water inlet pipe 101. The seventh detection element 140 is electrically connected to the control unit.

[0046] Specifically, the seventh detection element 140 is a flow meter, fixed to the good water inlet pipe 101 through the mounting hole, and connected to the control unit through a wire. This allows for real-time detection of the good water flow rate, enabling further comparison and verification of leakage detection results determined by liquid conductivity, thereby improving the detection accuracy of the heat exchanger flushing detection device.

[0047] Preferably, the heat exchanger flushing detection device further includes a ninth detection element 510 and a tenth detection element 610; the ninth detection element 510 is used in the wastewater inlet pipe 103 of the plate heat exchanger to detect the water pressure of the wastewater inlet pipe 103, and the tenth detection element 610 is used in the wastewater outlet pipe 104 of the plate heat exchanger to detect the water pressure of the wastewater outlet pipe 104. The ninth detection element 510 and the tenth detection element 610 are respectively electrically connected to the control unit.

[0048] Specifically, the ninth detection element 510 and the tenth detection element 610 are both pressure sensors, fixed to the wastewater inlet pipe 103 and the wastewater outlet pipe 104 respectively through mounting holes, and connected to the control unit via wires. When the pressure difference between the wastewater inlet pipe 103 and the wastewater outlet pipe 104 is greater than the standard pressure difference of the plate heat exchanger, it can be determined that there is a slight blockage in the wastewater pipe, and the alarm unit 400 can be activated to remind workshop personnel to prepare for alkaline washing. When the pressure difference between the wastewater inlet pipe 103 and the wastewater outlet pipe 104 is greater than the standard pressure difference of the plate heat exchanger, and the pressure difference reaches a preset value, it can be determined that there is a significant blockage in the wastewater pipe, and the secondary alarm function can be activated to remind workshop personnel to perform alkaline washing. Thus, by monitoring the pressure difference in the wastewater pipe in real time, data support is provided for backflushing alkaline washing.

[0049] Preferably, the heat exchanger flushing detection device further includes an eleventh detection element 520, a twelfth detection element 620, and a thirteenth detector; the eleventh detection element 520 is used in the wastewater inlet pipe 103 of the plate heat exchanger to detect the temperature of the wastewater inlet pipe 103; the twelfth detection element 620 is used in the wastewater outlet pipe 104 of the plate heat exchanger to detect the temperature of the wastewater outlet pipe 104; the eleventh detection element 520 and the twelfth detection element 620 are electrically connected to the control unit respectively; the thirteenth detection element 530 is used in the wastewater inlet pipe 103 of the plate heat exchanger to detect the flow rate of the wastewater inlet pipe 103; the thirteenth detection element 530 is electrically connected to the control unit.

[0050] Specifically, the eleventh detection element 520 and the twelfth detection element 620 are both temperature sensors, fixed to the wastewater inlet pipe 103 and the wastewater outlet pipe 104 respectively through mounting holes, and connected to the control unit via wires. Thus, the eleventh detection element 520 and the twelfth detection element 620 can detect temperature changes in the wastewater pipes and transmit the temperature change data to the control unit. The control unit compares the data with the heat exchanger's operating calibration data to verify the blockage detection results determined by differential pressure, thereby improving the detection accuracy of the heat exchanger flushing detection device. The thirteenth detection element 530 is a flow meter, fixed to the wastewater inlet pipe 103 through mounting holes and connected to the control unit via wires. Thus, real-time detection of the wastewater flow rate can further verify the blockage detection results determined by differential pressure, improving the detection accuracy of the heat exchanger flushing detection device.

[0051] Example 2

[0052] This utility model also provides a plate heat exchanger backflushing system, including a wastewater inlet pipe 103, a wastewater outlet pipe 104, a good water inlet pipe 101, a good water outlet pipe 102, a backflushing inlet pipe 105, a backflushing outlet pipe, an alkaline washing solution supply assembly, and the aforementioned heat exchanger flushing and detection device; the wastewater inlet pipe 103 and the wastewater outlet pipe 104 are connected to form a wastewater pipe, the good water inlet pipe 101 and the good water outlet pipe 102 are connected to form a good water pipe, the wastewater pipe and the good water pipe are arranged in parallel, the wastewater inlet pipe 103 is connected to the backflushing outlet pipe, and the wastewater outlet pipe 104 is connected to the backflushing inlet pipe 105.

[0053] Specifically, the wastewater inlet pipe 103 is connected to the backwash outlet pipe, and the wastewater outlet pipe 104 is connected to the backwash inlet pipe 105. When backwashing with alkaline washing is required, the inlet end of the wastewater inlet pipe 103 and the outlet end of the wastewater outlet pipe 104 will be closed by valves. This allows alkaline washing solution to be supplied to the backwash inlet pipe 105 through the alkaline washing solution supply component, and then enters the backwash outlet pipe through the wastewater pipe in the heat exchanger, thereby backwashing the deposits in the heat exchanger.

[0054] Furthermore, the alkaline washing solution supply assembly includes a water supply pipeline 710, an alkaline supply pipeline 720, an alkaline water tank 730, and a flushing pump 740; the water supply pipeline and the alkaline supply pipeline 720 are respectively connected to the alkaline water tank 730, and the two flushing pumps 740 are arranged in parallel between the alkaline water tank 730 and the backwash water inlet pipeline 105.

[0055] Specifically, the water supply pipeline 710 and the alkali supply pipeline 720 are respectively connected to the alkali water tank 730, thereby adding clean water and alkali to the alkali water tank 730. In this embodiment, two flushing pumps 740 are arranged in parallel between the alkali water tank 730 and the backflushing water inlet pipeline 105, with one air pump serving as the main flushing pump 740 and the other flushing pump 740 serving as the backup flushing pump 740, thereby achieving alternating maintenance and use to ensure the supply of alkali washing solution to the alkali washing supply component.

[0056] Furthermore, the heat exchanger flushing detection device also includes a pH meter 800, which is installed in the alkaline water tank 730 and connected to the control unit 300.

[0057] Specifically, a pH meter 800 is installed on the outer wall of the alkaline water tank 730 and extends into the alkaline water tank 730 to detect the pH value inside the alkaline water tank 730. The pH meter 800 is connected to the control unit 300 via a wire, thereby transmitting the pH value signal from the alkaline water tank 730 to the control unit 300. The control unit 300 is connected to the solenoid valves of the water supply pipe 710 and the alkali supply pipe 720 via wires, thereby controlling the on / off state of both and adjusting the alkali concentration inside the alkaline washing tank.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat exchanger flushing and detection device, applied to a plate heat exchanger, characterized in that, It includes a first detection element (110), a second detection element (210), a control unit (300), and an alarm unit (400); The first detection element (110) is installed in the good water inlet pipe (101) of the plate heat exchanger to detect the liquid conductivity in the good water inlet pipe (101). The second detection element (210) is installed in the good water outlet pipe (102) of the plate heat exchanger to detect the liquid conductivity in the good water outlet pipe (102). The first detection element (110) and the second detection element (210) are electrically connected to the control unit (300), and the alarm unit (400) is connected to the control unit (300).

2. The heat exchanger flushing detection device according to claim 1, characterized in that, The heat exchanger flushing detection device further includes a third detection element (120), a fourth detection element (220), a fifth detection element (130), and a sixth detection element (230). The third detection element (120) is installed in the good water inlet pipe (101) of the plate heat exchanger to detect the temperature in the good water inlet pipe (101). The fourth detection element (220) is installed in the good water outlet pipe (102) of the plate heat exchanger to detect the temperature in the good water outlet pipe (102). The third detection element (120) and the fourth detection element (220) are electrically connected to the control unit (300). The fifth detection element (130) is installed in the good water inlet pipe (101) of the plate heat exchanger to detect the pressure in the good water inlet pipe (101). The sixth detection element (230) is installed in the good water outlet pipe (102) of the plate heat exchanger to detect the pressure in the good water outlet pipe (102). The fifth detection element (130) and the sixth detection element (230) are electrically connected to the control unit (300).

3. The heat exchanger flushing detection device according to claim 1, characterized in that, The heat exchanger flushing detection device further includes a seventh detection element (140), which is used to install in the good water inlet pipe (101) of the plate heat exchanger to detect the flow rate in the good water inlet pipe (101). The seventh detection element (140) is electrically connected to the control unit (300).

4. The heat exchanger flushing detection device according to any one of claims 1-3, characterized in that, The heat exchanger flushing detection device also includes a ninth detection element (510) and a tenth detection element (610); The ninth detection element (510) is installed in the wastewater inlet pipe (103) of the plate heat exchanger to detect the water pressure of the wastewater inlet pipe (103). The tenth detection element (610) is installed in the wastewater outlet pipe (104) of the plate heat exchanger to detect the water pressure of the wastewater outlet pipe (104). The ninth detection element (510) and the tenth detection element (610) are electrically connected to the control unit (300).

5. The heat exchanger flushing detection device according to claim 4, characterized in that, The heat exchanger flushing detection device also includes an eleventh detection element (520), a twelfth detection element (620), and a thirteenth detection element (530); The eleventh detection element (520) is used in the wastewater inlet pipe (103) of the plate heat exchanger to detect the temperature of the wastewater inlet pipe (103). The twelfth detection element (620) is used in the wastewater outlet pipe (104) of the plate heat exchanger to detect the temperature of the wastewater outlet pipe (104). The eleventh detection element (520) and the twelfth detection element (620) are electrically connected to the control unit (300). The thirteenth detection element (530) is used in the wastewater inlet pipe (103) of the plate heat exchanger to detect the flow rate of the wastewater inlet pipe (103). The thirteenth detection element (530) is electrically connected to the control unit (300).

6. A backflushing system for a plate heat exchanger, characterized in that, It includes a wastewater inlet pipe (103), a wastewater outlet pipe (104), a good water inlet pipe (101), a good water outlet pipe (102), a backflushing inlet pipe (105), a backflushing outlet pipe, an alkaline washing solution supply assembly, and a heat exchanger flushing and testing device according to any one of claims 1-5; The wastewater inlet pipe (103) and the wastewater outlet pipe (104) are connected to form a wastewater pipe, the good water inlet pipe (101) and the good water outlet pipe (102) are connected to form a good water pipe, the wastewater pipe and the good water pipe are arranged in parallel, the wastewater inlet pipe (103) is connected to the backwash outlet pipe, the wastewater outlet pipe (104) is connected to the backwash inlet pipe (105), and the alkaline washing liquid supply component is connected to the backwash inlet pipe (105).

7. The plate heat exchanger backflushing system according to claim 6, characterized in that, The alkaline washing solution supply assembly includes a water supply pipeline (710), an alkali supply pipeline (720), an alkali water tank (730), and a rinsing pump (740); The water supply pipeline (710) and the alkali supply pipeline (720) are respectively connected to the alkali water tank (730), and the two flushing pumps (740) are arranged in parallel between the alkali water tank (730) and the backwash water inlet pipeline (105).

8. The plate heat exchanger backflushing system according to claim 7, characterized in that, The heat exchanger flushing detection device also includes a pH meter (800), which is installed in the alkaline water tank (730) and connected to the control unit (300).

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