Descaling and heat exchange integrated system based on sewage source heat pump

Abstract

The invention discloses a descaling and heat exchange integrated system based on a sewage source heat pump, belongs to the technical field of sewage waste heat recovery, and aims to solve the technical problem that the heat exchange effect is affected due to the fact that scale is easily formed in an evaporator and is inconvenient to clean in the prior art. The device comprises an evaporator which is respectively communicated with a sewage inlet and a sewage outlet; a heat exchange chamber is arranged in the evaporator, a heat exchange tube is arranged in the heat exchange chamber, two ends of the heat exchange tube are respectively communicated with the sewage inlet and the sewage outlet, and the heat exchange chamber is respectively communicated with a refrigerant inlet and a refrigerant outlet; the system comprises a gas-liquid separator, a compressor module, a user heat exchange end, a subcooler and a throttler. The descaling and heat exchange integrated system based on the sewage source heat pump can be used for heating in winter or refrigerating in summer, the instantaneous impact principle is utilized, the functions of decontamination, descaling and heat exchange enhancement are achieved, and compared with a common heat exchanger, the heat exchange sewage flow is increased, the heat exchange area is increased, and the heat exchange amount is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery from sewage, and in particular to an integrated descaling and heat exchange system based on a sewage source heat pump. Background Art

[0002] With the development of industry, energy consumption is huge. Coal burning is one of the main ways of production. The harmful gases and greenhouse gases produced by its combustion have aggravated environmental pollution and greenhouse effect. Various industries are actively seeking solutions. Sewage source heat pump, as an energy recovery technology, uses the heat in sewage to help reduce carbon emissions.

[0003] In the prior art, sewage source heat pump systems delay the formation of scale by optimizing the structure of the device, thereby reducing the accumulation of scale on the surface of the heat exchange tube. The flow and heat transfer characteristics of sewage are significantly different from those of clean water, and the water quality of sewage is variable, making the formation of scale difficult to control. Impurities in sewage can easily cause scaling and clogging of heat exchangers and pipelines, which has an impact on the performance of the pump unit that is difficult to quantitatively monitor and evaluate. The choice of working fluid has a great impact on the heat exchange performance of the heat pump, and it is necessary to find a working fluid that is better matched to the heat pump device. The heat exchanger is made of stainless steel, which is more susceptible to corrosion and scaling than copper, and has a lower thermal conductivity than copper. If the heat exchange tube is in the form of a straight tube, the contact time between the sewage and the refrigerant will be insufficient, thereby affecting the heat exchange efficiency.

[0004] In addition, the straight tube design not only has low space utilization, but also poor free expansion. The complexity of the internal structure of the heat exchanger makes it difficult to accurately measure the water flow state, which provides conditions for the formation of scale. Once scale is formed, it will seriously affect the heat exchange efficiency.

[0005] In traditional evaporator designs, sewage usually flows in the shell side, while refrigerant flows in the tube side. This layout makes it difficult to disassemble the evaporator shell, dirt easily accumulates on the shell, and it is difficult to clean. The sewage flow rate inside the heat exchanger is slow, and it is easy to form laminar flow, especially the flow at the bottom. This causes the main thermal resistance in the convective heat transfer process to no longer be the heat exchange inside the fluid, but the boundary layer heat transfer resistance between the fluid and the solid wall, which in turn leads to a decrease in heat exchange efficiency.

[0006] At present, some evaporators are equipped with cleaning devices such as scrapers or brushes to solve the dirt problem. These devices can effectively clean the dirt in the early stage, but over time, the brushes and scrapers will also accumulate dirt and become difficult to clean. In the end, these devices not only fail to effectively remove the dirt, but also increase the difficulty of cleaning, resulting in the opposite effect to the expected effect. Summary of the invention

[0007] The purpose of the present invention is to provide an integrated descaling and heat exchange system based on a sewage source heat pump, so as to solve the technical problem in the prior art that scaling is easy to form in the evaporator and is inconvenient to clean, thereby affecting the heat exchange effect.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] The present invention provides a descaling and heat exchange integrated system based on a sewage source heat pump, comprising:

[0010] An evaporator, wherein the evaporator is respectively connected with a sewage inlet and a sewage outlet; a heat exchange chamber is arranged in the evaporator, a heat exchange tube is arranged in the heat exchange chamber, two ends of the heat exchange tube are respectively connected with the sewage inlet and the sewage outlet, and the heat exchange chamber is respectively connected with a refrigerant inlet and a refrigerant outlet;

[0011] A gas-liquid separator, wherein the outlet of the refrigerator is connected to the input end of the gas-liquid separator;

[0012] A compressor module, wherein the output end of the gas-liquid separator is connected to the input end of the compressor module;

[0013] A user heat exchange end, the output end of the compressor module is connected to the input end of the user heat exchange end;

[0014] A subcooler, wherein the output end of the user heat exchange end is connected to the input end of the subcooler;

[0015] A throttle, wherein the output end of the subcooler is connected to the input end of the throttle, and the output end of the throttle is connected to the refrigerant inlet.

[0016] Optionally or preferably, the evaporator further comprises a first buffer tank and a second buffer tank, the sewage inlet is connected to the heat exchange tube through the first buffer tank, and the sewage outlet is connected to the heat exchange tube through the second buffer tank;

[0017] A filter plate is further provided between the sewage inlet and the first buffer tank; the angle formed between the filter plate and the wall surface of the first buffer tank is θ, and θ is 30°-60°;

[0018] The lower portion of the first buffer box is funnel-shaped and communicates with the discharge port.

[0019] Optionally or preferably, the heat exchange tube includes a plurality of first unit tubes and second unit tubes;

[0020] The first unit tubes and the second unit tubes are alternately connected, and the first unit tubes and the second unit tubes have different unit lengths and tube diameters.

[0021] Optionally or preferably, the unit length of the first unit tube is L1, and L1 is 30 mm-40 mm; the tube diameter of the first unit tube is D1, and D1 is 30 mm-40 mm;

[0022] The unit length of the second unit tube is L2, and L2 is 10 mm-20 mm; the tube diameter of the first unit tube is D2, and D2 is 20 mm-30 mm.

[0023] Optionally or preferably, the refrigerant inlet and / or the refrigerant outlet is connected to a liquid distributor.

[0024] Optionally or preferably, the compressor module comprises a two-position four-way valve and a compressor;

[0025] The two-position four-way valve comprises a liquid inlet, a working end 1, a working end 2 and a liquid outlet; the output end of the gas-liquid separator is connected to the liquid inlet, the liquid outlet is connected to the input end of the user heat exchanger, and a compressor is arranged between the working end 1 and the working end 2;

[0026] In the heating mode, the liquid inlet end is connected to the working end 1, and the liquid outlet end is connected to the working end 2;

[0027] In the refrigeration mode, the liquid inlet end is connected to the second working end, and the liquid outlet end is connected to the first working end.

[0028] Optionally or preferably, an oil separator is further provided between the compressor module and the user heat exchange end, the liquid outlet is communicated with the oil separator input end, and the oil separator output end is communicated with the user heat exchange end input end;

[0029] A dryer is also arranged between the subcooler and the throttle, the output end of the subcooler is communicated with the input end of the dryer, and the output end of the dryer is communicated with the input end of the throttle.

[0030] Optionally or preferably, the funnel-shaped wall slope of the lower portion of the first buffer box is 0.15; and the diameter of the discharge port is 100 mm.

[0031] Optionally or preferably, L1 is 30 mm, D1 is 30 mm, L2 is 10 mm, and D2 is 20 mm.

[0032] Optionally or preferably, the evaporator and heat exchange tube are made of copper;

[0033] The pipes used to connect the evaporator and the gas-liquid separator, the gas-liquid separator and the compressor module, the compressor module and the oil separator, the user heat exchange end and the subcooler, the subcooler and the dryer, the dryer and the throttle, and the throttle and the evaporator are made of copper;

[0034] The evaporator is a vertical evaporator, and a corrosion-resistant layer is arranged on the surface of the evaporator, and the corrosion-resistant layer is a galvanized layer.

[0035] Based on the above technical solution, the present invention can at least produce the following technical effects:

[0036] (1) The present invention provides heat exchange tubes with different diameters. When sewage flows through the diameter change point of the heat exchange tube, it will produce instantaneous impact. Under the combined effect of gravity and instantaneous impact force, the dirt on the wall surface in contact with the sewage is subjected to periodic collision stress. This stress effect is similar to a fatigue mechanism, causing the dirt layer to gradually crack and eventually fall off and enter the mainstream. The fallen dirt is deposited in the second buffer tank under the action of gravity and discharged through the discharge port. The heat exchange tube with a variable diameter effectively prevents dirt from being deposited in the heat exchange tube, significantly prolongs the service life of the vertical evaporator, and saves cleaning costs.

[0037] (2) In the present invention, the sewage flows in the tube side and the refrigerant flows in the shell side, thereby preventing the sewage from scaling in the evaporator shell, which is inconvenient to clean and thus shortens the life of the evaporator;

[0038] (3) A two-position four-way valve is provided in the compressor module of the present invention, so that the system can adjust the working mode of the heat pump according to seasonal requirements, including a cooling mode in summer and a heating mode in winter;

[0039] (4) The present invention adopts a vertical evaporator, which increases the water flow velocity and greatly improves the turbulence, and reduces the laminar flow to a certain extent, thereby significantly enhancing the heat exchange effect and improving the heat exchange efficiency between sewage and refrigerant. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the descaling and heat exchange integrated system based on the sewage source heat pump of the present invention;

[0041] Figure 2 It is a structural schematic diagram of an evaporator in the integrated descaling and heat exchange system based on a sewage source heat pump of the present invention;

[0042] Figure 3 yes Figure 2 A partial enlarged schematic diagram of the middle A part;

[0043] Figure 4 yes Figure 2 A partial enlarged schematic diagram of the middle B part;

[0044] Figure 5 It is a connection diagram of the compressor module in the integrated descaling and heat exchange system based on the sewage source heat pump in the heating mode of the present invention;

[0045] Figure 6It is a connection diagram of the compressor module in the integrated descaling and heat exchange system based on the sewage source heat pump in the cooling mode of the present invention;

[0046] Figure 7 It is a cloud diagram of water flow velocity at each point measured in a heat exchange tube with uniform diameter (with an inner diameter of 30 mm and a flow velocity in the tube of 0.4 m / s) in the descaling and heat exchange integrated system based on a sewage source heat pump of the present invention;

[0047] Figure 8 It is a cloud diagram of water flow velocity at each point measured in the heat exchange tube (the diameter of the first unit tube is 30 mm, the diameter of the second unit tube is 20 mm, the unit length is 10 mm, and the flow velocity in the tube is 0.4 m / s) in the integrated descaling and heat exchange system based on the sewage source heat pump of the present invention;

[0048] Fig. 9 It is a cloud diagram of water flow velocity at each point measured in the heat exchange tube (the diameter of the first unit tube is 30 mm, the diameter of the second unit tube is 20 mm, the unit length is 20 mm, and the flow rate in the tube is 0.4 m / s) in the integrated descaling and heat exchange system based on the sewage source heat pump of the present invention.

[0049] In the figure: 100, evaporator; 110, sewage inlet; 120, sewage outlet; 130, heat exchange tube; 131, first unit tube; 132, second unit tube; 140, refrigerant inlet; 150, refrigerant outlet; 160, first buffer tank; 170, second buffer tank; 180, filter plate; 190, discharge outlet;

[0050] 200. Gas-liquid separator;

[0051] 300, compressor module; 310, two-position four-way valve; 311, liquid inlet end; 312, working end 1; 313, working end 2; 314, liquid outlet end; 320, compressor;

[0052] 400, oil separator;

[0053] 500, user heat exchange end;

[0054] 600, subcooler;

[0055] 700, dryer;

[0056] 800. Throttle. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work belong to the scope of protection of the present invention.

[0058] Example

[0059] See also Figure 1 A descaling and heat exchange integrated system based on a sewage source heat pump includes an evaporator 100, a heat exchange chamber is arranged in the evaporator 100, a heat exchange tube 130 is arranged in the heat exchange chamber, and both ends of the heat exchange tube 130 are respectively connected to a sewage inlet 110 and a sewage outlet 120.

[0060] In this embodiment, the heat exchange chamber is respectively connected to a refrigerant inlet 140 and a refrigerant outlet 150. The refrigerant outlet 150 is sequentially connected to a gas-liquid separator 200, a compressor module 300, an oil separator 400, a user heat exchange end 500, a subcooler 600, a dryer 700 and a throttle 800 through a refrigerant pipeline. After the refrigerant passes through the throttle 800, it is connected to the refrigerant inlet 140 of the heat exchange chamber through the output end of the throttle 800.

[0061] In order to prevent the sewage from being formed in the shell of the evaporator 100, in this embodiment, the sewage flows in the tube side and the refrigerant flows in the shell side, thereby preventing the problem of sewage scaling in the evaporator shell.

[0062] See also Figures 2 to 9 In this embodiment, the evaporator 100 further includes a first buffer tank 160 and a second buffer tank 170 , wherein the sewage inlet 110 is connected to the heat exchange tube 130 through the first buffer tank 160 , and the sewage outlet 120 is connected to the heat exchange tube 130 through the second buffer tank 170 .

[0063] In order to further prevent sewage from scaling in the evaporator 100, in this embodiment, a solid-liquid filter plate 180 is also obliquely arranged between the sewage inlet 110 and the first buffer tank 160. The horizontal angle formed by the filter plate 180 and the wall of the first buffer tank 160 is θ. In this embodiment, θ is 30°-60°.

[0064] In addition, a funnel-shaped dirt discharge end is provided at the lower part of the first buffer box 160, the dirt discharge end has an inclined wall surface, and the lower part is connected to the discharge port 190; illustratively, the slope of the inclined wall surface of the dirt discharge end is 0.15, and the diameter of the discharge port 190 is 100 mm.

[0065] In order to prevent sewage from scaling in the heat exchange tube 130, in the present embodiment, the heat exchange tube 130 is alternately arranged with large and small diameters. Specifically, the heat exchange tube 130 includes a plurality of first unit tubes 131 and second unit tubes 132. The plurality of first unit tubes 131 and second unit tubes 132 are alternately arranged and connected to each other. For the first unit tubes 131 and the second unit tubes 132, by selecting different tube diameters and unit lengths, different liquid flow rate change effects in the tubes can be obtained, thereby obtaining different descaling effects.

[0066] In this embodiment, the unit length L1 of the first unit tube 131 is 30 mm; the tube diameter D1 of the first unit tube 131 is 30 mm; the unit length L2 of the second unit tube 132 is 10 mm; and the tube diameter D2 of the first unit tube 131 is 20 mm.

[0067] See also Figures 7 to 9 By setting the pipe diameters alternately, the sewage flow rate at the variable diameter port in the heat exchange pipe 130 is increased to 1.7 times the flow rate in the uniform pipe diameter; in addition, the length of the small diameter pipe (in this embodiment, the second unit pipe 132 is a small diameter pipe) has a significant effect on the instantaneous impact velocity of the variable diameter port. The longer the small diameter pipe is, the smaller the instantaneous impact velocity of the variable diameter port is. Therefore, the optimal length of the small diameter pipe is determined to be 10 mm to obtain the maximum instantaneous impact effect.

[0068] In this embodiment, liquid distributors are connected to the refrigerant inlet 140 and the refrigerant outlet 150, so that the refrigerant can be evenly distributed on the outside of the heat exchange tube 130 to form a thin film flow, thereby improving the heat exchange efficiency; at the same time, the liquid distributor can also control the refrigerant flow rate to avoid excessive input of refrigerant.

[0069] Exemplarily, the aperture of the liquid distributor is 100 mm, the hole spacing is 500 mm, and the refrigerant is R134a.

[0070] In this embodiment, the compressor module 300 includes a two-position four-way valve 310 and a compressor 320; wherein the two-position four-way valve 310 includes a corresponding liquid inlet end 311, a working end 1 312, a working end 2 313 and a liquid outlet end 314; the output end of the gas-liquid separator 200 is connected to the liquid inlet end 311, the liquid outlet end 314 is connected to the input end of the user heat exchanger 500, and the compressor 320 is arranged between the working end 1 312 and the working end 2 313;

[0071] In the heating mode, the liquid inlet end 311 is connected to the working end 1 312 , and the liquid outlet end 314 is connected to the working end 2 313 ;

[0072] In the cooling mode, the liquid inlet end 311 is connected to the second working end 313 , and the liquid outlet end 314 is connected to the first working end 312 .

[0073] The descaling and heat exchange integrated system based on sewage source heat pump provided by the present invention can select a suitable working mode according to actual working needs, including heating mode and cooling mode;

[0074] The working process of the heating mode is as follows: first, by adjusting the two-position four-way valve 310, the liquid inlet end 311 is connected to the working end 1 312, and the liquid outlet end 314 is connected to the working end 2 313; so that the refrigerant circulates counterclockwise. The refrigerant first passes through the throttle 800 to control its flow, and then enters the vertical evaporator 100. In the evaporator 100, the refrigerant exchanges heat with the sewage through the refrigerant pipeline. After exchanging heat, the refrigerant flows out of the refrigerant outlet 150, passes through the gas-liquid separator 200, the compressor module 300 and the oil separator 400 in sequence, and finally enters the user heat exchange end 500. In the user heat exchange end 500, the refrigerant exchanges heat with the user-side circulating medium; thereafter, the refrigerant flows through the subcooler 600, adjusts the flow again, and then enters the dryer 700 for drying. The dried refrigerant finally returns to the throttling mechanism 800, completing a complete heat exchange cycle.

[0075] The working process of the cooling mode is as follows: first, by adjusting the two-position four-way valve 310, the liquid inlet end 311 is connected to the working end 2 313, and the liquid outlet end 314 is connected to the working end 1 312, so that the refrigerant circulates in a clockwise direction. The refrigerant is first compressed by the compressor module 300 and then enters the vertical evaporator 100. In the evaporator 100, the refrigerant exchanges heat with the sewage through the refrigerant pipeline. After exchanging heat, the refrigerant flows out from the refrigerant outlet 150, returns to the refrigerant inlet 140 through the refrigerant pipeline, and then flows into the throttle 800 to control the flow rate. Then, the refrigerant flows through the dryer 700 and the subcooler 600 in sequence to further adjust the state. After that, the refrigerant enters the user heat exchange end 500 and exchanges heat with the user-side circulating medium. After completing the heat exchange, the refrigerant flows into the oil separator 400 to remove the oil, and finally returns to the compressor module 300 to complete a complete heat exchange cycle.

[0076] In this embodiment, the evaporator 100 and the heat exchange tube 130 are made of copper; the pipes used to connect the evaporator 100 with the gas-liquid separator 200, the gas-liquid separator 200 with the compressor module 300, the compressor module 300 with the oil separator 400, the user heat exchange end 500 with the subcooler 600, the subcooler 600 with the dryer 700, the dryer 700 with the throttle 800, and the throttle 800 with the evaporator 100 are made of red copper; illustratively, the thickness of the copper tube is 1.5 mm. The evaporator 100 is a vertical evaporator, and a corrosion-resistant layer is provided on its surface, and the corrosion-resistant layer is a galvanized layer to improve durability and service life.

[0077] In winter, the use of the integrated descaling and heat exchange system based on the sewage source heat pump provided in this embodiment can produce a very significant heating effect. Compared with the existing sewage heat source pump, this system not only improves the heat exchange temperature difference, but also reduces the heat exchange area, thereby significantly improving the utilization rate of sewage waste heat. In addition, in terms of anti-fouling, the device of the present invention also performs well, the amount of dirt generated on the heat exchange wall surface in contact with sewage is reduced, and the time for dirt formation is also extended.

[0078] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A descaling and heat exchange integrated system based on sewage source heat pump, characterized in that: include: An evaporator (100), wherein the evaporator (100) is respectively connected to a sewage inlet (110) and a sewage outlet (120); a heat exchange chamber is provided in the evaporator (100), a heat exchange tube (130) is provided in the heat exchange chamber, two ends of the heat exchange tube (130) are respectively connected to the sewage inlet (110) and the sewage outlet (120), and a refrigerant inlet (140) and a refrigerant outlet (150) are respectively connected to the heat exchange chamber; A gas-liquid separator (200), wherein the refrigerator outlet (150) is connected to an input end of the gas-liquid separator (200); A compressor module (300), wherein the output end of the gas-liquid separator (200) is connected to the input end of the compressor module (300); A user heat exchange end (500), wherein the output end of the compressor module (300) is connected to the input end of the user heat exchange end (500); A subcooler (600), wherein the output end of the user heat exchange end (500) is connected to the input end of the subcooler (600); A throttle (800), wherein the output end of the subcooler (600) is connected to the input end of the throttle (800), and the output end of the throttle (800) is connected to the refrigerant inlet (140).

2. The integrated descaling and heat exchange system based on sewage source heat pump according to claim 1 is characterized in that: The evaporator (100) further comprises a first buffer tank (160) and a second buffer tank (170), the sewage inlet (110) being in communication with the heat exchange tube (130) through the first buffer tank (160), and the sewage outlet (120) being in communication with the heat exchange tube (130) through the second buffer tank (170); A filter plate (180) is further provided between the sewage inlet (110) and the first buffer tank (160); an angle θ formed by the filter plate (180) and the wall surface of the first buffer tank (160) is 30°-60°; The lower portion of the first buffer box (160) is funnel-shaped and communicates with the discharge port (190).

3. The integrated descaling and heat exchange system based on sewage source heat pump according to claim 1 is characterized in that: The heat exchange tube (130) includes a plurality of first unit tubes (131) and second unit tubes (132); A plurality of the first unit tubes (131) and the second unit tubes (132) are alternately connected, and the first unit tubes (131) and the second unit tubes (132) have different unit lengths and tube diameters.

4. The integrated descaling and heat exchange system based on sewage source heat pump according to claim 3 is characterized in that: The unit length of the first unit tube (131) is L1, and L1 is 30 mm-40 mm; the tube diameter of the first unit tube (131) is D1, and D1 is 30 mm-40 mm; The unit length of the second unit tube (132) is L2, and L2 is 10 mm-20 mm; the tube diameter of the first unit tube (131) is D2, and D2 is 20 mm-30 mm.

5. The integrated descaling and heat exchange system based on sewage source heat pump according to claim 1 is characterized in that: The refrigerant inlet (140) and / or the refrigerant outlet (150) are connected to a liquid distributor.

6. The integrated descaling and heat exchange system based on sewage source heat pump according to claim 1 is characterized in that: The compressor module (300) comprises a two-position four-way valve (310) and a compressor (320); The two-position four-way valve (310) comprises a liquid inlet end (311), a first working end (312), a second working end (313) and a liquid outlet end (314); the output end of the gas-liquid separator (200) is in communication with the liquid inlet end (311), the liquid outlet end (314) is in communication with the input end of the user heat exchanger (500), and a compressor (320) is provided between the first working end (312) and the second working end (313); In the heating mode, the liquid inlet end (311) is connected to the working end 1 (312), and the liquid outlet end (314) is connected to the working end 2 (313); In the refrigeration mode, the liquid inlet end (311) is connected to the second working end (313), and the liquid outlet end (314) is connected to the first working end (312).

7. The integrated descaling and heat exchange system based on sewage source heat pump according to claim 6 is characterized in that: An oil separator (400) is also provided between the compressor module (300) and the user heat exchange end (500), the liquid outlet end (314) is communicated with the input end of the oil separator (400), and the output end of the oil separator (400) is communicated with the input end of the user heat exchange end (500); A dryer (700) is also provided between the subcooler (600) and the throttle (800); the output end of the subcooler (600) is connected to the input end of the dryer (700), and the output end of the dryer (700) is connected to the input end of the throttle (800).

8. The integrated descaling and heat exchange system based on sewage source heat pump according to claim 2 is characterized in that: The funnel-shaped lower portion of the first buffer box (160) has a wall slope of 0.15; and the diameter of the discharge port (190) is 100 mm.

9. The integrated descaling and heat exchange system based on sewage source heat pump according to claim 4 is characterized in that: L1 is 30mm, D1 is 30mm, L2 is 10mm, and D2 is 20mm.

10. The integrated descaling and heat exchange system based on sewage source heat pump according to claim 1, characterized in that: The evaporator (100) and the heat exchange tube (130) are made of copper; The pipes used for connecting the evaporator (100) and the gas-liquid separator (200), the gas-liquid separator (200) and the compressor module (300), the compressor module (300) and the oil separator (400), the user heat exchange end (500) and the subcooler (600), the subcooler (600) and the dryer (700), the dryer (700) and the throttle (800), and the throttle (800) and the evaporator (100) are made of copper; The evaporator (100) is a vertical evaporator, and a corrosion-resistant layer is provided on its surface, wherein the corrosion-resistant layer is a galvanized layer.

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