Anti-blocking heat exchange system

Abstract

The utility model relates to the technical field of heat exchange systems, in particular to an anti-blocking heat exchange system which comprises a heat exchanger and a two-way filtering system. The bidirectional filtering system comprises a first filtering assembly and a second filtering assembly; the first filter assembly comprises a first filter, an M1 electric valve and an M2 electric valve, wherein the M1 electric valve and the M2 electric valve are connected in series. The inlet end of the first filter is located between the M1 electric valve and the M2 electric valve, and a T-shaped flow dividing opening is formed. The connection form of the second filter assembly is the same as that of the first filter assembly; the outlet ends of the two filters are respectively connected with the sewage port A and the sewage port B through wastewater connecting pipes; regulating valves are arranged on the wastewater connecting pipes; a waste water direct discharge pipeline is arranged between the sewage port and the regulating valve; a densimeter and a direct discharge valve are arranged on the waste water direct discharge pipeline; according to the system, the water flow direction is adjusted through the time difference, so that the water flow passes through the inlets and outlets of the two filters and the heat exchanger in a bidirectional switching manner, and the whole filtering system is conveniently and autonomously washed.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange systems, in particular to an anti-blocking heat exchange system. Background Technique

[0002] At present, in the fields of printing and dyeing, food, and beverages, there are a large number of high-grade waste heat wastewater. Due to the improvement of energy-saving awareness, many manufacturers carry out the recovery of waste heat from wastewater. However, due to the large amount of impurities in the wastewater, the requirements for the filtration system and plate heat exchanger are relatively high. The following pain points exist in the heat exchange systems on the market:

[0003] 1. The filtration system is prone to blockage and requires manual cleaning at regular intervals. Some filtration systems adopt an automatic flushing scheme, but in occasions with a large amount of impurities, the filtration system is still blocked and requires manual cleaning at regular intervals.

[0004] 2. Although the filtration system can remove most of the impurities, there are still a small number of impurities entering the subsequent heat exchanger. In order to reduce the cleaning frequency of the heat exchanger, some customers use shell-and-tube heat exchangers instead of plate heat exchangers with higher heat exchange efficiency. This results in a large floor area and low heat exchange efficiency of the shell-and-tube heat exchanger for the same heat exchange efficiency. Content of the Utility Model

[0005] The purpose of this application is to provide an anti-blocking heat exchange system, aiming to solve the problems in the prior art.

[0006] An embodiment of this application provides an anti-blocking heat exchange system, including a heat exchanger and a two-way filtration system; the heat exchanger is provided with a sewage port A, a sewage port B, a clean water port C, and a clean water port D; the two-way filtration system includes a first filtration component and a second filtration component; the first filtration component includes a first filter and M1 electric valve and M2 electric valve connected in series; the inlet end of the first filter is located between the M1 electric valve and the M2 electric valve, forming a T-shaped shunt port; the second filtration component includes a second filter, an M3 electric valve, and an M4 electric valve; the connection form of the second filtration component is the same as that of the first filtration component; the outlet end of the first filter is connected to the sewage port A through a wastewater connection pipe; the outlet end of the second filter is connected to the sewage port B through a wastewater connection pipe; a regulating valve is provided on the wastewater connection pipe; the M1 electric valve and the M3 electric valve are connected in parallel to the high-temperature inlet pipeline; the M2 electric valve and the M4 electric valve are connected in parallel to the drainage pipeline; a wastewater direct discharge pipeline is provided on the wastewater connection pipe between the sewage port A and the sewage port B and the regulating valve; the wastewater direct discharge pipelines are all connected to the drainage pipeline; a densitometer and a direct discharge valve are provided on the wastewater direct discharge pipeline; the densitometer is arranged at one end close to the sewage port A and the sewage port B.

[0007] Further, an M5 electric valve and an M6 electric valve are arranged in parallel at the clear water outlet C; an M7 electric valve and an M8 electric valve are arranged in parallel at the clear water outlet D; the M5 electric valve and the M7 electric valve are connected to the low-temperature water supply pipe through a connecting pipe; the M6 electric valve and the M8 electric valve are connected to the high-temperature water outlet pipe; a temperature sensor and a control valve are sequentially arranged on the high-temperature water outlet pipe; a return pipe is arranged between the temperature sensor and the control valve; the return pipe is connected to the low-temperature water supply pipe; a return regulating valve is arranged on the return pipe.

[0008] Further, a sewage pump is arranged on the high-temperature water inlet pipe; the high-temperature water inlet pipe is connected to the high-temperature sewage pool; the drainage pipe is connected to the low-temperature waste water pool.

[0009] Further, the high-temperature water outlet pipe is connected to the hot water tank; a clear water pump is arranged on the low-temperature water supply pipe, and the low-temperature water supply pipe is connected to the tap water supply port.

[0010] Further, the heat exchanger is a plate heat exchanger.

[0011] The beneficial effects of the present utility model are as follows: The present utility model adopts a plate heat exchanger, which has high heat exchange efficiency and small floor area; at the same time, according to the impurity content of the high-temperature sewage, the switching time of the inlets and outlets of the two filters and the heat exchanger can be adjusted by time to realize the two-way flow of water, which is convenient for self-flushing of the entire filtration system, reduces the labor intensity and cost of manually cleaning the filters and the heat exchanger, and achieves full-automatic operation. It not only fully exchanges the heat in the sewage but also avoids the blockage of the filters and the heat exchanger. Description of the Drawings

[0012] Figure 1 It is a structural flow chart of the present utility model.

[0013] In the figure:

[0014] 1. Tap water supply port; 2. High-temperature sewage pool; 3. Low-temperature waste water pool; 4. Clear water pump; 5. Sewage pump; 6. M1 electric valve; 7. M2 electric valve; 8. First filter; 9. High-temperature water inlet pipe; 10. M3 electric valve; 11. M4 electric valve; 12. Second filter; 13. Drainage pipe; 14. Waste water connecting pipe; 15. Regulating valve; 16. Density meter; 17. Direct discharge valve; 18. Waste water direct discharge pipe; 19. High-temperature water outlet pipe; 20. Temperature sensor; 21. Control valve; 22. Return regulating valve; 23. M5 electric valve; 24. M6 electric valve; 25. M7 electric valve; 26. M8 electric valve; 27. Low-temperature water supply pipe; 28. Return pipe; 29. Heat exchanger; 30. Clear water outlet C; 31. Clear water outlet D; 32. Sewage outlet B; 33. Sewage outlet A; 34. Hot water tank. Detailed Implementation Manner

[0015] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0016] As Figure 1 shown, an anti-blocking heat exchange system includes a heat exchanger 29 and a two-way filtering system; the heat exchanger 29 is provided with a sewage port A 33, a sewage port B 32, a clear water port C 30 and a clear water port D 31; the two-way filtering system includes a first filtering component and a second filtering component; the first filtering component includes a first filter 8 and an M1 electric valve 6 and an M2 electric valve 7 connected in series with each other; the inlet end of the first filter 8 is located between the M1 electric valve 6 and the M2 electric valve 7, forming a T-shaped diversion port; the second filtering component includes a second filter 12, an M3 electric valve 10 and an M4 electric valve 11; the connection form of the second filtering component is the same as that of the first filtering component; the outlet end of the first filter 8 is connected to the sewage port A 33 through a waste water connection pipe 14; the outlet end of the second filter 12 is connected to the sewage port B 32 through the waste water connection pipe 14; a regulating valve 15 is provided on the waste water connection pipe 14; the M1 electric valve 6 and the M3 electric valve 10 are connected in parallel to the high-temperature inlet pipe 9; the M2 electric valve 7 and the M4 electric valve 11 are connected in parallel to the drainage pipe 13; a waste water direct discharge pipe 18 is provided on the waste water connection pipe 14 between the sewage port A 33 and the sewage port B 32 and the regulating valve 15; the waste water direct discharge pipe 18 is connected to the drainage pipe 13; a densitometer 16 and a direct discharge valve 17 are provided on the waste water direct discharge pipe 18; the densitometer 16 is arranged at one end close to the sewage port A 33 and the sewage port B 32.

[0017] At the clear water outlet C 30, an M5 electric valve 23 and an M6 electric valve 24 are arranged in parallel; at the clear water outlet D 31, an M7 electric valve 25 and an M8 electric valve 26 are arranged in parallel; the M5 electric valve 23 and the M7 electric valve 25 are connected to the low-temperature water supply pipe 27 through a connecting pipe; the M6 electric valve 24 and the M8 electric valve 26 are connected to the high-temperature water outlet pipe 19; a temperature sensor 20 and a control valve 21 are sequentially arranged on the high-temperature water outlet pipe 19; a return pipe 28 is arranged between the temperature sensor 20 and the control valve 21; the return pipe 28 is connected to the low-temperature water supply pipe 27; a return regulating valve 22 is arranged on the return pipe 28; when the temperature sensor 20 senses that the temperature in the high-temperature water outlet pipe 19 has not reached the set temperature, the return regulating valve 22 opens and the control valve 21 closes, and the water flows back into the low-temperature water inlet pipe 27 for re-heat exchange; if the temperature reaches the requirement, the control valve 21 opens and the high-temperature water directly flows into the hot water tank 34.

[0018] A sewage pump 5 is arranged on the high-temperature water inlet pipe 9; the high-temperature water inlet pipe 9 is connected to the high-temperature sewage tank 2; the drain pipe 13 is connected to the low-temperature waste water tank 3.

[0019] The high-temperature water outlet pipe 19 is connected to the hot water tank 34; a clear water pump 4 is arranged on the low-temperature water supply pipe 27, and the low-temperature water supply pipe 27 is connected to the tap water supply port 1.

[0020] The heat exchanger 29 is a plate heat exchanger.

[0021] The operation process of the system is as follows. The first operating state is that sewage enters the two-way filtration system through the sewage pump 5. First, the M1 electric valve 6 opens, and the sewage is filtered by the first filter 8. The filtered sewage enters the heat exchanger 29 through the sewage outlet A 33 and comes out from the sewage outlet B 32. The heat-exchanged sewage is inspected by the densitometer 16. If the density is low and the impurities are few, the regulating valve 15 opens, and the sewage flushes the second filter 12 and is discharged through the M4 electric valve 11; at the same time, clear water passes through the clear water pump 4, enters the clear water outlet D 31 through the M7 electric valve 25, exchanges heat with the heat exchanger 29, and the exchanged high-temperature clear water comes out from the clear water outlet C 30, enters the hot water tank through the M6 electric valve 24 for production use.

[0022] After the system runs for a set period of time in the first operating state, the second operating state is started. At this time, the sewage flows into the second filter 12 through the M3 electric valve 10. The filtered sewage enters the heat exchanger 29 through the sewage outlet B 32 and flows out from the sewage outlet A 33, flushing away the impurities accumulated at the sewage outlet A 33 of the plate heat exchanger A 33. Similarly, after being detected by the densitometer 16, if the density of the sewage is low, it can flow into the first filter 8 through the regulating valve 15 to clean the first filter 8, and then be discharged through the M2 electric valve 7. The clean water enters through the M5 electric valve 23 from the clean water outlet C 30, and the heated high-temperature water after heat exchange comes out from the clean water outlet D 31 and enters the hot water tank 34 through the M8 electric valve 26, and this cycle continues. Through the alternation of the above two working states, both the heat exchanger and the filter are cleaned.

[0023] The detection process of the densitometer 16 in the above two states is as follows: when the densitometer 16 detects that the waste water flowing out of the two sewage outlets has too high a density due to excessive impurities, the direct discharge valve 17 opens, and the waste water is directly discharged through the waste water direct discharge pipeline 18 without cleaning the filter until the impurities become less, then the direct discharge valve 17 closes, and the regulating valve on the waste water connecting pipe 14 opens, and the waste water then flows into the filter for cleaning cycle.

[0024] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. An anti-clogging heat exchange system, characterized in that: It includes a heat exchanger and a two-way filtering system; the heat exchanger is provided with a sewage inlet A, a sewage inlet B, a clean water inlet C and a clean water inlet D; the two-way filtering system includes a No. 1 filtering component and a No. 2 filtering component; the No. 1 filtering component includes a No. 1 filter and an M1 electric valve and an M2 electric valve connected in series; the inlet end of the No. 1 filter is located between the M1 electric valve and the M2 electric valve to form a T-shaped diversion port; the No. 2 filtering component includes a No. 2 filter, an M3 electric valve and an M4 electric valve; the connection form of the No. 2 filtering component is the same as that of the No. 1 filtering component; the outlet end of the No. 1 filter is connected through The wastewater connecting pipe is connected to the sewage outlet A; the outlet end of the second filter is connected to the sewage outlet B through the wastewater connecting pipe; a regulating valve is provided on the wastewater connecting pipe; the M1 electric valve and the M3 electric valve are arranged in parallel and connected to the high-temperature water inlet pipe; the M2 electric valve and the M4 electric valve are arranged in parallel and connected to the drainage pipe; a wastewater direct discharge pipe is provided on the wastewater connecting pipe between the sewage outlet A and the sewage outlet B and the regulating valve; the wastewater direct discharge pipes are all connected to the drainage pipe; a density meter and a direct discharge valve are provided on the wastewater direct discharge pipe; the density meter is arranged at one end close to the sewage outlet A and the sewage outlet B.

2. The anti-clogging heat exchange system according to claim 1, characterized in that: The clean water outlet C is provided with an M5 electric valve and an M6 electric valve arranged in parallel; the clean water outlet D is provided with an M7 electric valve and an M8 electric valve arranged in parallel; the M5 electric valve and the M7 electric valve are connected to the low-temperature water supply pipe through a connecting pipe; the M6 ​​electric valve and the M8 electric valve are connected to the high-temperature water outlet pipe; the high-temperature water outlet pipe is provided with a temperature sensor and a control valve in sequence; a reflux pipe is provided between the temperature sensor and the control valve; the reflux pipe is connected to the low-temperature water supply pipe; and a reflux regulating valve is provided on the reflux pipe.

3. The anti-clogging heat exchange system according to claim 1, characterized in that: The high-temperature water inlet pipe is provided with a sewage pump; the high-temperature water inlet pipe is connected to the high-temperature sewage pool; the drainage pipe is connected to the low-temperature wastewater pool.

4. The anti-clogging heat exchange system according to claim 2, characterized in that: The high-temperature water outlet pipe is connected to the hot water tank; the low-temperature water supply pipe is provided with a clean water pump, and the low-temperature water supply pipe is connected to the tap water supply port.

5. The anti-clogging heat exchange system according to claim 1, characterized in that: The heat exchanger is a plate heat exchanger.

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