Spiral plate heat exchanger system with backflush

Abstract

This invention provides a spiral plate heat exchanger system with backflushing, belonging to the technical field of spiral plate heat exchangers. The spiral plate heat exchanger system of this invention includes a spiral plate heat exchanger and a backflushing device. The spiral plate heat exchanger has two concentric spiral channels with opposite directions of rotation inside. The backflushing device includes a receiving chamber containing a coarse filter assembly and a fine filter assembly. The receiving chamber has an inlet and an outlet. The inlet communicates with the coarse filter assembly, and the outlet communicates with the fine filter assembly. The inlet and outlet can be connected to the spiral channels that need to be cleaned. This invention, through the backflushing device, achieves automatic flushing of the spiral plate heat exchanger, which, compared to the manual cleaning methods in the prior art, has the advantages of high intelligence, high cleaning efficiency, and good cleaning effect.

Description

Technical Field

[0001] This invention relates to the technical field of spiral plate heat exchangers, and particularly to a spiral plate heat exchanger system with backflushing. Background Technology

[0002] Spiral plate heat exchangers are commonly used in heat exchange applications, widely used in chemical, food, pharmaceutical, shipbuilding, and power industries. Existing spiral plate heat exchangers typically feature spirally arranged cold material channels and spirally arranged hot material channels, concentrically distributed and alternating from the inside out. The outer wall of the spiral plate heat exchanger has cold material inlet, cold material outlet, hot material inlet, and hot material outlet, respectively. The cold material inlet and outlet are connected to the cold material channels, and the hot material inlet and outlet are connected to the hot material channels. During operation, cold material sequentially passes through the cold material inlet, cold material channels, and cold material outlet, while hot material sequentially passes through the hot material inlet, hot material channels, and hot material outlet. Both cold and hot materials travel simultaneously along a spiral path to achieve heat exchange.

[0003] However, after prolonged operation, the aforementioned spiral plate heat exchangers typically accumulate a significant amount of impurities in the cold and / or hot material channels, requiring timely cleaning to ensure smooth operation. Currently, the common cleaning method involves disassembling the spiral plate heat exchanger and manually flushing the cold and / or hot material channels with high-pressure water. While this method effectively cleans the cold and / or hot material channels, it suffers from drawbacks such as high labor costs, long cleaning time, low cleaning efficiency, and poor cleaning results. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a spiral plate heat exchanger system with backflushing to solve the problems of the existing spiral plate heat exchanger cleaning methods being labor-intensive, time-consuming, inefficient, and ineffective. It can improve the intelligence level of cleaning spiral plate heat exchangers, as well as improve cleaning efficiency and effectiveness.

[0005] To achieve the above and other related objectives, the present invention provides a spiral plate heat exchanger system with backflushing, the spiral plate heat exchanger system with backflushing comprising: Spiral plate heat exchangers have two concentric spiral flow channels with opposite directions of rotation inside. A backwashing device includes a receiving chamber containing a coarse filter assembly and a fine filter assembly. The receiving chamber has an inlet and an outlet. The inlet communicates with the coarse filter assembly, and the outlet communicates with the fine filter assembly. The inlet and the outlet can be connected to the spiral flow channel that needs to be cleaned. The liquid in the containment chamber can enter the spiral flow channel through the outlet to flush the dirt in the spiral flow channel. The wastewater generated after flushing can enter the containment chamber through the inlet and can be filtered by the coarse filter component and the fine filter component in sequence, and then enter the spiral flow channel again through the outlet to flush the spiral flow channel again or multiple times.

[0006] In one embodiment of the present invention, the water inlet includes a water inlet pipe and a water inlet cover plate. The water inlet pipe is fixedly connected to the top wall of the receiving chamber and communicates with the coarse filter assembly. The water inlet cover plate covers the top of the water inlet pipe and is detachably connected to the water inlet pipe. The spiral flow channel passes through the water inlet cover plate through a pipe to achieve communication with the water inlet. The coarse filtration assembly includes a filter basket with several filter holes on its surface. The outer side wall of the filter basket near the top is provided with a lug, and the inner side wall of the water inlet pipe is provided with a support platform for supporting the lug in the height direction so that the filter basket can be suspended vertically in the receiving chamber.

[0007] In one embodiment of the present invention, the water outlet includes a main water outlet pipe, a secondary water outlet pipe, and a water outlet cover plate. The main water outlet pipe penetrates the top wall of the receiving chamber and is fixedly connected to the receiving chamber. The water outlet cover plate covers the top of the main water outlet pipe and is detachably connected to the main water outlet pipe. The secondary water outlet pipe is located inside the receiving chamber and is connected to the end of the main water outlet pipe away from the water outlet cover plate. The secondary water outlet pipe communicates with the main water outlet pipe, and there is a gap between the end of the secondary water outlet pipe away from the main water outlet pipe and the bottom wall of the receiving chamber. The fine filtration assembly includes an outer fixed shell, an inner filter element, and a connecting water pipe. The bottom wall of the outer fixed shell has several through holes. The inner filter element is disposed inside the outer fixed shell. A supporting rib is fixed on the inner side wall of the main water outlet pipe. The outer fixed shell is located inside the main water outlet pipe and placed on the supporting rib. The connecting water pipe is fixed to the top wall of the outer fixed shell and communicates with the inner cavity of the outer fixed shell. The water outlet cover plate has a through hole for the connecting water pipe to pass through. The spiral flow channel is connected to the connecting water pipe through a pipe to achieve communication with the water outlet.

[0008] In one embodiment of the present invention, the top of the receiving chamber is recessed to form an installation cavity, a cleaning agent box is detachably installed in the installation cavity, the cleaning agent box is provided with a delivery pipe, and the spiral flow channel is connected to the pipe of the connecting water pipe and the delivery pipe.

[0009] In one embodiment of the present invention, a liquid turbidity detection component is provided on the pipe connected to the spiral flow channel and the water pipe. The liquid turbidity detection component includes a transfer box, a light emitter, and a light receiver. The liquid from the water outlet passes through the transfer box and flows in a direction perpendicular to the liquid flow direction. The light emitter and the light receiver are arranged opposite to each other on both sides of the transfer box.

[0010] In one embodiment of the present invention, a liquid flow rate detection sensor is provided on the pipe connected to the water pipe in the spiral flow channel, and the liquid flow rate detection sensor is used to detect the flow rate of the liquid in real time.

[0011] In one embodiment of the present invention, a liquid level detection component is provided inside the container and near the top wall of the container. The liquid detection component includes a float, a magnet, and a Hall sensor. An extension arm is provided on the outer wall of the float and the extension arm is rotatably connected inside the container. The magnet is located inside the float, and the Hall sensor is located on the container and near the float.

[0012] In one embodiment of the present invention, the spiral plate heat exchanger system with backflushing further includes a drive assembly and a self-cleaning assembly, wherein the drive assembly is used to drive the self-cleaning assembly to reciprocate within the housing chamber, so as to clean the inner bottom wall of the housing chamber using the self-cleaning assembly. The self-cleaning component includes a mounting base, a cleaning component, and a driving component. The mounting base is connected to the driving component. The mounting base has a receiving cavity on the side facing the inner bottom wall of the receiving compartment. The cleaning component is rotatably connected to the receiving cavity. The side of the cleaning component facing the inner bottom wall of the receiving compartment protrudes from the opening of the receiving cavity. The driving component is mounted on the mounting base and is used to drive the cleaning component to rotate.

[0013] In one embodiment of the present invention, the inner wall of the receiving cavity is provided with a water spray hole, and there are multiple water spray holes. The mounting base is provided with a clean water channel communicating with the water spray hole. The end of the clean water channel away from the water spray hole passes through the outer wall of the mounting base and is connected to a clean water pipe. The clean water pipe is connected to an external water source. The self-cleaning component also includes a wastewater tank and a negative pressure device. The wastewater tank is located outside the receiving chamber and is connected to the negative pressure device, which is used to create a negative pressure inside the wastewater tank. A suction port is provided on the inner wall of the receiving cavity. A wastewater flow channel communicating with the suction port is provided inside the mounting base. The end of the wastewater flow channel away from the suction port passes through the outer wall of the mounting base and is connected to a wastewater pipe, which is connected to the wastewater tank. A scraping strip and a baffle are provided on the inner wall of the receiving cavity. The suction port is located between the scraping strip and the baffle, along the rotation direction of the cleaning component. The baffle is located upstream of the scraping strip. The scraping strip and the cleaning component are in an interference fit, and the baffle is spaced out. Along the rotation direction of the cleaning component, the water inlet is located upstream of the water spray hole. During the rotation of the cleaning component, the water spray hole sprays clean water onto the cleaning component to clean the inner bottom wall of the receiving chamber while the cleaning component is wet. Subsequently, the cleaning component continues to rotate and is scraped by the scraping strip. The sewage inside the cleaning component is scraped away into the cavity between the scraping strip and the baffle. Under the negative pressure of the sewage tank, the sewage located between the scraping strip and the baffle is sucked into the sewage tank through the water inlet.

[0014] In one embodiment of the present invention, the mounting base includes a first base and a second base, the cleaning component and the driving component are both connected to the second base, the first base is connected to the driving component, a mounting plate is fixed on the first base, a lifting component is fixed on the mounting plate, and the telescopic end of the lifting component is fixedly connected to the second base.

[0015] Compared with existing technologies, the above technical solution has the following advantages: The backwashing device enables automatic flushing of the spiral plate heat exchanger, offering advantages over manual cleaning methods in existing technologies, including higher intelligence, higher cleaning efficiency, and better cleaning results. Furthermore, because the backwashing device includes coarse and fine filtration components, the wastewater generated after flushing the spiral flow channel is purified through these components. The purified liquid can then be reused to flush the spiral flow channel of the spiral plate heat exchanger, offering benefits such as environmental protection and water conservation.

[0016] The squeegee can scrape away dirt from the cleaning components, while clean water from the spray nozzles continuously sprays water to clean the components. This ensures that the cleaning components are always clean and moist, effectively cleaning the inner bottom wall of the container.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram illustrating a spiral plate heat exchanger system with backflushing, used to demonstrate an embodiment of this application.

[0020] Figure 2 This is a cross-sectional view illustrating the internal structure of the backwashing device in an embodiment of this application.

[0021] Figure 3 This is a cross-sectional view illustrating the self-cleaning component in an embodiment of this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Spiral plate heat exchanger; 101. Second pipe; 102. First pipe; 2. Backwashing device; 201. Receiving chamber; 202. Coarse filter assembly; 2021. Filter basket; 2022. Lug; 203. Fine filter assembly; 2031. Outer fixed shell; 2032. Inner filter element; 2033. Connecting water pipe; 204. Water inlet; 2041. Water inlet pipe; 2042. Water inlet cover; 2043. Support platform; 205. Water outlet; 2051. Main water outlet pipe; 2052. Secondary water outlet pipe; 2053. Water outlet cover; 2054. Support rib; 206. Mounting cavity; 207. Restricting component; 3. Detergent box; 301. Delivery pipeline; 4. Liquid turbidity detection assembly; 5. Liquid flow rate detection sensor; 6. Liquid level detection. Components; 601, float; 602, magnet; 603, extension arm; 7, drive assembly; 701, drive pulley; 702, driven pulley; 703, synchronous belt; 8, self-cleaning assembly; 801, mounting base; 8011, receiving cavity; 8012, first seat; 8013, second seat; 802, cleaning component; 8021, rag; 803, guide groove; 804, optocoupler; 805, mounting plate; 806, lifting component; 807, water spray hole; 808, clean water channel; 809, mounting groove; 810, water spray strip; 811, connecting pipe; 812, clean water pipe; 813, wastewater tank; 814, wastewater channel; 815, wastewater pipe; 816, scraper strip; 817, baffle strip; 818, retaining ring; 819, reset spring; 820, drain pipe. Detailed Implementation

[0023] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.

[0026] Existing spiral plate heat exchangers typically have spirally arranged cold material channels and spirally arranged hot material channels, which are concentric and alternately distributed from the inside out. The outer wall of the spiral plate heat exchanger has a cold material inlet, a cold material outlet, a hot material inlet, and a hot material outlet, respectively. The cold material inlet and outlet are connected to the cold material channels, and the hot material inlet and outlet are connected to the hot material channels. During operation, the cold material sequentially passes through the cold material inlet, cold material channels, and cold material outlet, while the hot material sequentially passes through the hot material inlet, hot material channels, and hot material outlet. Both cold and hot materials travel simultaneously along a spiral path to achieve heat exchange.

[0027] However, after prolonged operation, the aforementioned spiral plate heat exchangers typically accumulate a significant amount of impurities in the cold and / or hot material channels, requiring timely cleaning to ensure smooth operation. Currently, the common cleaning method involves disassembling the spiral plate heat exchanger and manually flushing the cold and / or hot material channels with high-pressure water. While this method effectively cleans the cold and / or hot material channels, it suffers from drawbacks such as high labor costs, long cleaning time, low cleaning efficiency, and poor cleaning results.

[0028] To address the problems of existing methods for cleaning spiral plate heat exchangers, such as high manpower consumption, long cleaning time, low cleaning efficiency, and poor cleaning effect, this application provides a spiral plate heat exchanger system with backflushing, which can improve the intelligence level of cleaning spiral plate heat exchangers and improve cleaning efficiency and effect.

[0029] See Figure 1 and Figure 2 The spiral plate heat exchanger system with backflushing provided in this application embodiment includes a spiral plate heat exchanger 1 and a backflushing device 2. The spiral plate heat exchanger 1 has two concentric spiral channels with opposite directions of rotation inside. It should be noted that the spiral plate heat exchanger 1 is a conventional spiral plate heat exchanger 1, and the two spiral channels are a cold material channel and a hot material channel, which will not be described in detail in this application embodiment. The backflushing device 2 includes a receiving chamber 201, the interior of which is a sealed cavity used to store liquid. The receiving chamber 201 is generally rectangular; in other examples, the receiving chamber 201 may also be circular, elliptical, cubic, etc. A coarse filter assembly 202 and a fine filter assembly 203 are provided inside the receiving chamber 201, with the coarse filter assembly 202 having a lower filtration accuracy than the fine filter assembly 203. The container 201 is provided with an inlet 204 and an outlet 205. The inlet 204 is connected to the coarse filter component 202, and the outlet 205 is connected to the fine filter component 203.

[0030] See Figure 1 and Figure 2 The inlet 204 and outlet 205 can be connected to the spiral flow channel that needs cleaning. In one example, the inlet 204 and outlet 205 can be connected to either spiral flow channel. For example, when the hot material flow channel needs cleaning, the inlet 204 and outlet 205 are connected to the hot material flow channel. Specifically, the inlet 204 is connected to the hot material outlet of the hot material flow channel via a pipe, and the outlet 205 is connected to the hot material inlet of the hot material flow channel via a pipe. In other examples, when both the hot and cold material flow channels need cleaning, the inlet 204 and outlet 205 can be connected to both spiral flow channels simultaneously. For example, the inlet 204 is connected to the hot material outlet and the cold material outlet via a T-connector, and the outlet 205 is connected to the hot material inlet and the cold material inlet via a T-connector.

[0031] The liquid in the receiving chamber 201 can enter the spiral flow channel that needs to be cleaned through the outlet 205 to flush the dirt in the spiral flow channel. The wastewater generated after flushing can enter the receiving chamber 201 through the inlet 204, and can be filtered by the coarse filter assembly 202 and the fine filter assembly 203 in sequence, and then enter the spiral flow channel that needs to be cleaned again through the outlet 205 to flush the spiral flow channel again or multiple times.

[0032] This embodiment of the application achieves automatic flushing of the spiral plate heat exchanger 1 by setting up the backwashing device 2. Compared with the manual cleaning method in the prior art, it has the advantages of high intelligence, high cleaning efficiency and good cleaning effect. Furthermore, since the backwashing device 2 has a coarse filter component 202 and a fine filter component 203, the wastewater generated after flushing the spiral flow channel can be purified by filtering through the coarse filter component 202 and the fine filter component 203. The purified liquid can be reused to flush the spiral flow channel of the spiral plate heat exchanger 1, which has the benefits of environmental protection and water conservation.

[0033] See Figure 2 In one embodiment, the inlet 204 includes an inlet pipe 2041, which is fixedly connected to the top wall of the receiving chamber 201 and communicates with the coarse filter assembly 202. Specifically, the top wall of the receiving chamber 201 has an installation opening, and the bottom end of the inlet pipe 2041 is inserted into the installation opening. The outer side wall of the inlet pipe 2041 is fixed to the inner side wall of the installation opening by welding, thereby fixing the inlet pipe 2041 to the top wall of the receiving chamber 201. The shape of the installation opening is adapted to the shape of the inlet pipe 2041. The cross-section of the inlet pipe 2041 can be circular or rectangular, and this application does not limit it in this regard.

[0034] See Figure 2 The inlet 204 also includes an inlet cover plate 2042, which covers the top of the inlet pipe 2041. The inlet cover plate 2042 is detachably connected to the inlet pipe 2041. For example, a flange is fitted on the top of the inlet pipe 2041, and the upper surface of the flange is flush with the end face of the inlet pipe 2041. The inlet cover plate 2042 covers the top of the inlet pipe 2041 and the flange. The edge of the inlet cover plate 2042 is provided with through holes corresponding to the bolt holes of the flange. The bolt assembly passes through the bolt holes of the flange and the through holes of the inlet cover plate 2042 in sequence and is then locked to achieve a detachable connection between the inlet cover plate 2042 and the inlet pipe 2041.

[0035] See Figure 2 A through hole is provided in the inlet cover plate 2042. The spiral flow channel that needs to be cleaned is connected to the through hole in the inlet cover plate 2042 through the second pipe 101, thereby realizing the connection between the spiral flow channel and the inlet 204.

[0036] See Figure 2 The coarse filtration assembly 202 includes a filter basket 2021, which is a box structure with an open top. The through hole of the inlet cover 2042 communicates with the top opening of the filter basket 2021. The top opening of the filter basket 2021 is used to receive wastewater from the inlet 204. The surface of the filter basket 2021 has several filter holes, through which coarse filtration of the wastewater is achieved.

[0037] See Figure 2 The filter basket 2021 has a lug 2022 on its outer side wall near the top, and the top surface of the lug 2022 is flush with the top end face of the filter basket 2021. A support platform 2043 is provided on the inner side wall of the water inlet pipe 2041. The support platform 2043 is used to support the lug 2022 in the height direction so that the filter basket 2021 can be suspended vertically in the receiving chamber 201. For example, the filter basket 2021 has a circular cross-section, the inlet pipe 2041 also has a circular cross-section, the lug 2022 is annular and is fixedly fitted around the outer periphery of the filter basket 2021, and the support platform 2043 is annular and is fixedly connected to the inside of the inlet pipe 2041. The outer diameter of the lug 2022 is larger than the inner diameter of the support platform 2043 and smaller than the inner diameter of the inlet pipe 2041. The inner diameter of the support platform is larger than the outer diameter of the filter basket 2021. When installing the filter basket 2021, it is passed through the support platform 2043 until the lug 2022 overlaps the support platform 2043. Of course, in other examples, the cross-sectional shape of the filter basket 2021, the cross-sectional shape of the inlet pipe 2041, the shape of the lug 2022, and the shape of the support platform 2043 can also be other shapes, such as rectangles. This embodiment does not limit these shapes.

[0038] See Figure 2 To improve the stability of the filter basket 2021 within the inlet pipe 2041, the height of the lug 2022 is equal to or slightly greater than the distance between the top surface of the support platform 2043 and the top of the inlet pipe 2041. With this setting, when the lug 2022 on the filter basket 2021 is placed on the support platform 2043, the top surface of the lug 2022 is exactly flush with the top surface of the inlet pipe 2041. When the inlet cover 2042 is placed on the top of the inlet pipe 2041, the inlet pipe 2041 can press the lug 2022 tightly onto the support platform 2043, thereby enabling the filter basket 2021 to be stably installed within the inlet pipe 2041.

[0039] The inlet cover 2042 is detachably connected to the inlet pipe 2041. The filter basket 2021 is attached to the support platform 2043 via lugs 2022. This design improves the ease of disassembling the filter basket 2021. Specifically, when the filtration efficiency of the filter basket 2021 decreases due to prolonged use, the operator can first remove the inlet cover 2042 and then directly lift the filter basket 2021 out of the inlet pipe 2041. After being lifted out, the filter basket 2021 can be rinsed to clean it. After cleaning, the filter basket 2021 can be placed back into the inlet pipe 2041 for coarse filtration again.

[0040] In one embodiment, in order to improve the sealing performance between the water inlet cover 2042 and the lug 2022, a sealing ring (not shown in the figure) is embedded on the upper surface of the lug 2022. When the water inlet cover 2042 is pressed onto the water inlet pipe 2041, the sealing ring is deformed by the pressure, thereby improving the sealing performance between the water inlet cover 2042 and the lug 2022.

[0041] See Figure 2 In one embodiment, the water outlet 205 includes a main water outlet pipe 2051 and a secondary water outlet pipe 2052. The main water outlet pipe 2051 penetrates the top wall of the receiving chamber 201. Specifically, the top wall of the receiving chamber 201 has a through hole. One end of the main water outlet pipe 2051 extends into the receiving chamber 201 through the through hole, and the other end is located outside the receiving chamber 201. The outer side wall of the main water outlet pipe 2051 and the inner side wall of the through hole are fixed together by welding. The secondary water outlet pipe 2052 is located inside the receiving chamber 201 and is connected to the end of the main water outlet pipe 2051 that extends into the receiving chamber 201. One end of the secondary water outlet pipe 2052 communicates with the bottom of the main water outlet pipe 2051, and the other end has a gap with the bottom wall of the receiving chamber 201. In this way, water can be pumped out from the bottom of the receiving chamber 201 using the secondary water outlet pipe 2052, improving the utilization rate of water in the receiving chamber 201.

[0042] See Figure 2 The outlet 205 also includes an outlet cover 2053, which is installed on the top of the main outlet pipe 2051 and is detachably connected to the main outlet pipe 2051. For example, a flange is fixedly fitted on the top of the main outlet pipe 2051, with the upper surface of the flange flush with the end face of the main outlet pipe 2051. The outlet cover 2053 is installed on the top of the main outlet pipe 2051 and the flange. The edge of the outlet cover 2053 has through holes corresponding to the bolt holes of the flange. Bolt assemblies are sequentially passed through the bolt holes of the flange and the through holes of the outlet cover 2053 and then locked to achieve a detachable connection between the outlet cover 2053 and the main outlet pipe 2051.

[0043] See Figure 2The fine filtration assembly 203 includes an outer fixed shell 2031, an inner filter element 2032, and a connecting water pipe 2033. The outer fixed shell 2031 has a box structure, and its bottom wall has several through holes. Water from the secondary water outlet pipe 2052 can enter the outer fixed shell 2031 through these through holes and be filtered by the inner filter element 2032. A supporting rib 2054 is fixed on the inner side wall of the main water outlet pipe 2051. The supporting rib 2054 has a ring-shaped structure with an opening in the middle area, which allows water from the secondary water outlet pipe 2052 to pass through. The outer fixing shell 2031 is located inside the main water outlet pipe 2051 and placed on the supporting rib 2054. Furthermore, the height of the outer fixing shell 2031 is equal to the distance from the upper surface of the supporting rib 2054 to the port of the main water outlet pipe 2051. Thus, when the water outlet cover 2053 is placed on the top of the main water outlet pipe 2051, the water outlet cover 2053 can press against the outer fixing shell 2031, thereby fixing the outer fixing shell 2031 inside the main water outlet pipe 2051. The connecting water pipe 2033 is fixed to the top wall of the outer fixing shell 2031 and communicates with the inner cavity of the outer fixing shell 2031. The water outlet cover 2053 has a through hole for the connecting water pipe 2033 to pass through. The spiral flow channel connects to the connecting water pipe 2033 through the first pipe 102 to achieve communication with the water outlet 205. A pump is installed on the first pipe 102. The pump is used to pressurize and transport the liquid in the container 201 through the first pipe 102 to the spiral flow channel.

[0044] The water outlet cover 2053 is detachably connected to the main water outlet pipe 2051, and the outer fixing shell 2031 overlaps the supporting rib 2054. This design improves the convenience of disassembling the outer fixing shell 2031 and the inner filter element 2032. Specifically, when the filtration effect of the outer fixing shell 2031 and the inner filter element 2032 decreases due to long-term use, the staff can first remove the water outlet cover 2053, and then directly lift the outer fixing shell 2031 and the inner filter element 2032 out of the main water outlet pipe 2051 for replacement.

[0045] See Figure 2 In one embodiment, the top of the receiving chamber 201 is recessed to form an installation cavity 206. A cleaning agent box 3 is detachably installed in the installation cavity 206. The cleaning agent box 3 is provided with a delivery pipe 301, and the first pipe 102 is connected to the delivery pipe 301. With this configuration, the staff can add cleaning agents with corresponding cleaning functions to the cleaning agent box 3 according to the cleaning needs. The cleaning agent can enter the first pipe 102 through the delivery pipe 301 and mix with the clean water in the first pipe 102, thereby improving the cleaning effect on the spiral flow channel.

[0046] See Figure 2A pump is installed on the delivery pipeline 301 to pump the cleaning agent in the cleaning agent box 3 into the first pipeline 102. The pump can be an impeller pump or a peristaltic pump. In other embodiments, a heating element (not shown in the figure) can also be installed on the first pipeline 102. The heating element can heat the liquid in the pipeline, so that the liquid used to clean the spiral flow channel is hot water. Hot water has a better dissolving power for dirt, thereby further improving the cleaning effect.

[0047] See Figure 2 In one embodiment, a liquid turbidity detection component 4 is provided on the first pipe 102. The liquid turbidity detection component 4 includes a transfer box, a light emitter, and a light receiver. Liquid from the outlet 205 passes through the transfer box along a direction perpendicular to the liquid flow. The light emitter and the light receiver are positioned opposite each other on both sides of the transfer box. Specifically, the first pipe 102 is divided into two sections, with the two sections of the first pipe 102 located at both ends of the transfer box and connected to it respectively. As the liquid from the outlet 205 is guided through the first pipe 102, it passes through the transfer box. At this time, the light emitted by the light emitter can penetrate the liquid and be received by the light receiver. The backwashing device 2 also includes a controller. The light receiver converts the received light signal into an electrical signal and sends it to the controller. The controller can process the electrical signal to determine the degree of turbidity of the liquid.

[0048] When the turbidity level exceeds the turbidity threshold, the liquid's cleanliness is deemed substandard. In this case, the backwashing device 2 stops supplying water to the spiral plate heat exchanger 1 and prompts personnel to clean or replace the coarse filter assembly 202 and the fine filter assembly 203. Conversely, when the turbidity level is less than or equal to the turbidity threshold, the liquid's cleanliness is deemed satisfactory, and the backwashing device 2 continues supplying water to the spiral plate heat exchanger 1. In this way, by detecting the turbidity of the liquid from the outlet 205, the cleanliness level of the liquid can be automatically determined, improving the system's automation and intelligence. Simultaneously, it ensures the cleanliness of the liquid used to clean the spiral flow channel, guaranteeing the maintenance effect of the spiral flow channel.

[0049] See Figure 2 In one embodiment, a liquid flow rate detection sensor 5 is provided on the first pipe 102. The liquid flow rate detection sensor 5 is used to detect the flow rate of the liquid in real time. With this setting, by detecting the flow rate of the liquid, it can be determined whether the liquid is blocked. When the flow rate is lower than the threshold, it is determined that the liquid is blocked. At this time, the operator needs to stop the backwashing device 2 and clean or replace the coarse filter component 202 and the fine filter component 203. When the flow rate is greater than or equal to the threshold, it is determined that the liquid is not blocked. At this time, the backwashing device 2 can be kept working normally.

[0050] See Figure 2In one embodiment, a liquid level detection component 6 is provided inside the receiving chamber 201 and near its top wall. The liquid detection component includes a float 601, a magnet 602, and a Hall sensor. An extension arm 603 is provided on the outer wall of the float 601, and the extension arm 603 is rotatably connected to the receiving chamber 201 via a shaft. The magnet 602 is fixed inside the float 601, and the Hall sensor is located on the receiving chamber 201 and close to the float 601. With this configuration, when the liquid in the receiving chamber 201 contacts the float 601 and rises continuously, the liquid will cause the float 601 to rise continuously. During the rise of the float 601, the position of the magnet 602 inside the float 601 relative to the Hall sensor will change, resulting in a change in magnetic flux. The Hall sensor determines the liquid level based on the change in magnetic flux. The Hall sensor has a preset threshold. When the float 601 rises to the height corresponding to this threshold, the controller will stop the backwashing device 2 to prevent the liquid level in the receiving chamber 201 from becoming too high.

[0051] See Figure 2 and Figure 3 In one embodiment, the spiral plate heat exchanger system with backflushing further includes a drive assembly 7 and a self-cleaning assembly 8. The drive assembly 7 is used to drive the self-cleaning assembly 8 to reciprocate within the housing 201 to clean the inner bottom wall of the housing 201 using the self-cleaning assembly 8. For example, a set of drive components 7 are provided opposite to each other on two inner sidewalls of the receiving chamber 201. The drive components 7 include a drive motor, a drive pulley 701, a driven pulley 702, and a timing belt 703. The drive pulley 701 and the driven pulley 702 are rotatably connected inside the receiving chamber 201 and located above the inner bottom wall of the receiving chamber 201. The line connecting the drive pulley 701 and the driven pulley 702 is parallel to the length direction of the inner bottom wall of the receiving chamber 201. The drive motor is fixed outside the receiving chamber 201. The drive motor can be directly connected to the drive pulley 701 or connected to the drive pulley 701 through a gearbox. The timing belt 703 is wound around the drive pulley 701 and the driven pulley 702. The drive motor can drive the drive pulley 701 to rotate, thereby driving the timing belt 703 and the driven pulley 702 to move. The self-cleaning component 8 is connected between the timing belts 703 on both sides. Through the horizontal reciprocating motion of the timing belts 703, the self-cleaning component 8 achieves reciprocating motion within the receiving chamber 201. In other examples, sprockets and chains can be used instead of the pulleys and timing belts 703 in the above example.

[0052] See Figure 2 and Figure 3The self-cleaning component 8 includes a mounting base 801, a cleaning element 802, and a drive element. The mounting base 801 is connected to the drive component 7, for example, by mounting between two synchronous belts 703 that can be connected to the drive component 7 in the example described above. The mounting base 801 has a receiving cavity 8011 on the side facing the inner bottom wall of the receiving chamber 201. The surface of the cleaning element 802 has a cylindrical cloth 8021. The cleaning element 802 is rotatably connected within the receiving cavity 8011, and the side of the cleaning element 802 facing the inner bottom wall of the receiving chamber 201 protrudes from the opening of the receiving cavity 8011. The drive element is a motor, mounted on the mounting base 801, used to drive the cleaning element 802 to rotate. The drive element can directly drive the cleaning element 802 to rotate, or it can drive the cleaning element 802 to rotate via a gearbox.

[0053] With this setup, when dirt accumulates on the inner bottom wall of the receiving chamber 201 due to sedimentation, the operator activates the drive assembly 7, which drives the self-cleaning assembly 8 to reciprocate along the inner bottom wall of the receiving chamber 201. During the reciprocating motion of the self-cleaning assembly 8, the cleaning component 802 remains in a rotating state, and in this rotating state, the cleaning component 802 is always in contact with the inner bottom wall of the receiving chamber 201. Thus, through the rotation of the cleaning component 802 and its reciprocating motion along the inner bottom wall of the receiving chamber 201, the inner bottom wall of the receiving chamber 201 is cleaned, further improving the automation level and self-cleaning capability of the backwashing device 2.

[0054] See Figure 2 and Figure 3 In addition, to prevent the secondary water outlet pipe 2052 from affecting the cleaning coverage of the cleaning component 802, a limiting member 207 is fixed inside the receiving chamber 201. The limiting member 207 has a limiting hole through which the secondary water outlet pipe 2052 passes. With this setting, the position of the secondary water outlet pipe 2052 inside the receiving chamber 201 can be limited by the limiting hole, thereby making the secondary water outlet pipe 2052 as close as possible to the inner wall of the receiving chamber 201, thereby improving the cleaning coverage of the cleaning component 802.

[0055] See Figure 2 and Figure 3 In one embodiment, guide grooves 803 are respectively provided on two opposite inner sidewalls of the receiving chamber 201. The length direction (guiding direction) of the guide grooves 803 is parallel to the direction of reciprocating motion of the self-cleaning component 8 on the inner bottom wall of the receiving chamber 201. A guide block is fixed on the mounting base 801 and slidably connected to the guide grooves 803. The cooperation between the guide grooves 803 and the guide blocks improves the stability of the self-cleaning component 8 when it reciprocates on the inner bottom wall of the receiving chamber 201.

[0056] See Figure 2 and Figure 3In one embodiment, two optocouplers 804 are respectively provided above each guide groove 803 body. One optocoupler 804 is close to one end of the guide groove 803, and the other optocoupler 804 is close to the other end of the guide groove 803. A baffle is provided on the mounting base 801. The baffle can enter the detection area of ​​the two optocouplers 804, and then the position of the cleaning part 802 can be determined by the optocouplers 804.

[0057] See Figure 2 and Figure 3 In one embodiment, the mounting base 801 includes two first bases 8012 and one second base 8013. The cleaning component 802 and the driving component are both connected to the second base 8013, while the guide block and the baffle are both connected to the first bases 8012. The two first bases 8012 are respectively connected to the driving assemblies 7 on both sides (e.g., a synchronous belt 703 connected to the driving assembly 7). A mounting plate 805 is fixed between the two first bases 8012, and a lifting component 806 (e.g., a cylinder) is fixed to the mounting plate 805. The telescopic end of the lifting component 806 is fixedly connected to the second base 8013.

[0058] With this configuration, the lifting component 806 can raise the cleaning component 802 when not in operation, thus preventing the cleaning component 802 from prolonged contact with the bottom wall of the receiving chamber 201, which could lead to surface hardening and failure, and improving the service life of the cleaning component 802. Furthermore, the lifting component 806 can adjust the contact pressure between the cleaning component 802 and the bottom wall of the receiving chamber 201 in real time. When dirt on the bottom wall of the receiving chamber 201 is difficult to clean, operators can control the lifting component 806 to increase the contact pressure of the cleaning component 802 against the bottom wall of the receiving chamber 201, thereby improving the cleaning ability of the cleaning component 802.

[0059] See Figure 2 and Figure 3 In one embodiment, the inner wall of the receiving cavity 8011 is provided with water spray holes 807. Multiple water spray holes 807 are provided along the length of the cleaning component 802. The mounting base 801 is provided with a clean water channel 808 communicating with the water spray holes 807. One end of the clean water channel 808 away from the water spray holes 807 passes through the outer wall of the mounting base 801 and is connected to a clean water pipe 812. The clean water pipe 812 is connected to an external water source.

[0060] See Figure 2 and Figure 3For example, the inner wall of the receiving cavity 8011 is provided with a mounting groove 809, and the mounting base 801 is provided with a water flow channel 808. One end of the water flow channel 808 communicates with the mounting groove 809, and the other end penetrates the outer wall of the mounting base 801. Specifically, a part of the water flow channel 808 can be drilled from the bottom of the mounting groove 809, and another part of the water flow channel 808 can be drilled from the outer wall of the mounting base 801. The two parts converge in the mounting base 801 to form a complete water flow channel 808. A water spray strip 810 is fixed in the mounting groove 809. The water spray strip 810 is fixed in place after the water flow channel 808 is set. There is a gap between the water spray strip 810 and the bottom of the mounting groove 809, and multiple water spray holes 807 penetrate the water spray strip 810. In addition, to facilitate connection with the clean water pipe 812, a connecting pipe 811 is fixed to the outer wall of the mounting base 801. The connecting pipe 811 is connected to the clean water channel 808, and the clean water pipe 812 is connected to the connecting pipe 811 through a connector. The clean water pipe 812 extends out of the side wall of the receiving chamber 201 and is connected to an external water source. With this configuration, clean water from the outside can be transported to the mounting groove 809 through the clean water pipe 812, and then sprayed onto the surface of the cleaning component 802 through the spray nozzle 807. This ensures that the cleaning component 802 is always cleaned by clean water during its rotation, thereby ensuring that the cleaning component 802 can always clean the bottom wall of the receiving chamber 201 in a relatively clean state.

[0061] See Figure 2 and Figure 3 The self-cleaning component 8 also includes a wastewater tank 813 and a negative pressure device. The wastewater tank 813 is located outside the receiving chamber 201. As an example, the wastewater tank 813 can be fixedly connected to the receiving chamber 201. The wastewater tank 813 is connected to the negative pressure device, which can be, for example, a fan. The negative pressure device is used to create a negative pressure inside the wastewater tank 813. A suction port is provided on the inner side wall of the receiving cavity 8011. A wastewater flow channel 814 communicating with the suction port is provided in the mounting base 801. The end of the wastewater flow channel 814 away from the suction port passes through the outer side wall of the mounting base 801 and is connected to a wastewater pipe 815. The wastewater pipe 815 extends out of the side wall of the receiving chamber 201 and is connected to the wastewater tank 813. The inner wall of the receiving cavity 8011 is provided with a scraper 816 and a baffle 817. The water suction port is located between the scraper 816 and the baffle 817, and along the rotation direction of the cleaning member 802, the baffle 817 is located upstream of the scraper 816. The scraper 816 and the cleaning member 802 are in an interference fit, and the baffle 817 is provided with a gap. It should be noted that the connection method between the sewage channel 814 and the sewage pipe 815 is the same as the connection method between the clean water channel 808 and the clean water pipe 812, and will not be described again in this embodiment.

[0062] Along the rotation direction of the cleaning component 802, the water intake is located upstream of the water spray hole 807. During the rotation of the cleaning component 802, the water spray hole 807 sprays clean water onto the cleaning component 802 so that the cleaning component 802 cleans the inner bottom wall of the receiving chamber 201 in a wet state. Subsequently, the cleaning component 802 continues to rotate and is scraped by the scraping strip 816. The sewage in the cleaning component 802 is scraped away into the cavity between the scraping strip 816 and the baffle 817. Under the negative pressure of the sewage tank 813, the sewage located between the scraping strip 816 and the baffle 817 is sucked into the sewage tank 813 through the water intake.

[0063] The scraper strip 816 can scrape away dirt from the cleaning component 802, while clean water from the spray nozzle 807 continuously sprays water to clean the cleaning component 802. This ensures that the cleaning component 802 is always clean and moist, effectively cleaning the inner bottom wall of the receiving chamber 201. It should be noted that when using the spray nozzle 807 and the suction port, the liquid in the receiving chamber 201 must be completely drained.

[0064] See Figure 2 and Figure 3 In one embodiment, to adapt the clean water pipe 812 and the wastewater pipe 815 to the movement of the self-cleaning component 8, both the clean water pipe 812 and the wastewater pipe 815 are flexible pipes. A retaining ring 818 is fixed to the distal end of each pipe, and a reset spring 819 is sleeved on each pipe, located between the retaining ring 818 and the side wall of the receiving chamber 201. When the self-cleaning component 8 moves away from the wastewater tank 813, the clean water pipe 812 and the wastewater pipe 815 are pulled, compressing the reset spring 819. When the self-cleaning component 8 moves closer to the wastewater tank 813, the elastic force of the reset spring 819 straightens the clean water pipe 812 and the wastewater pipe 815, thus preventing them from becoming entangled.

[0065] In one embodiment, since the self-cleaning component 8 is sometimes underwater, all cables of the self-cleaning component 8 are wrapped with sealing rubber to avoid short circuits.

[0066] See Figure 2 and Figure 3In one embodiment, a drain pipe 820 is connected to the bottom of the wastewater tank 813, and another through hole is passed through the inlet cover 2042, which communicates with the inlet 204. The end of the drain pipe 820 away from the wastewater tank 813 is connected to the through hole, and a pump is installed on the drain pipe 820. When the self-cleaning component 8 completes a cleaning operation of the receiving chamber 201 and wastewater accumulates in the wastewater tank 813, the operator turns on the pump on the drain pipe 820 to pump the wastewater in the wastewater tank 813 to the inlet 204, thereby allowing the wastewater in the wastewater tank 813 to be reused and improving the environmental performance of the spiral plate heat exchanger system with backwashing.

[0067] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A spiral plate heat exchanger system with backflushing, characterized in that, include: Spiral plate heat exchangers have two concentric spiral flow channels with opposite directions of rotation inside. A backwashing device includes a receiving chamber containing a coarse filter assembly and a fine filter assembly. The receiving chamber has an inlet and an outlet. The inlet communicates with the coarse filter assembly, and the outlet communicates with the fine filter assembly. The inlet and the outlet can be connected to the spiral flow channel that needs to be cleaned. The liquid in the containment chamber can enter the spiral flow channel through the outlet to flush the dirt in the spiral flow channel. The wastewater generated after flushing can enter the containment chamber through the inlet and can be filtered by the coarse filter component and the fine filter component in sequence, and then enter the spiral flow channel again through the outlet to flush the spiral flow channel again or multiple times.

2. The spiral plate heat exchanger system with backflushing according to claim 1, characterized in that, The water inlet includes an inlet pipe and an inlet cover plate. The inlet pipe is fixedly connected to the top wall of the receiving chamber and communicates with the coarse filter assembly. The inlet cover plate covers the top of the inlet pipe and is detachably connected to the inlet pipe. The spiral flow channel passes through the inlet cover plate through a pipe to achieve communication with the water inlet. The coarse filtration assembly includes a filter basket with several filter holes on its surface. The outer side wall of the filter basket near the top is provided with a lug, and the inner side wall of the water inlet pipe is provided with a support platform for supporting the lug in the height direction so that the filter basket can be suspended vertically in the receiving chamber.

3. The spiral plate heat exchanger system with backflushing according to claim 1, characterized in that, The water outlet includes a main water outlet pipe, a secondary water outlet pipe, and a water outlet cover plate. The main water outlet pipe passes through the top wall of the receiving chamber and is fixedly connected to the receiving chamber. The water outlet cover plate covers the top of the main water outlet pipe and is detachably connected to the main water outlet pipe. The secondary water outlet pipe is located inside the receiving chamber and is connected to the end of the main water outlet pipe away from the water outlet cover plate. The secondary water outlet pipe communicates with the main water outlet pipe, and there is a gap between the end of the secondary water outlet pipe away from the main water outlet pipe and the bottom wall of the receiving chamber. The fine filtration assembly includes an outer fixed shell, an inner filter element, and a connecting water pipe. The bottom wall of the outer fixed shell has several through holes. The inner filter element is disposed inside the outer fixed shell. A supporting rib is fixed on the inner side wall of the main water outlet pipe. The outer fixed shell is located inside the main water outlet pipe and placed on the supporting rib. The connecting water pipe is fixed to the top wall of the outer fixed shell and communicates with the inner cavity of the outer fixed shell. The water outlet cover plate has a through hole for the connecting water pipe to pass through. The spiral flow channel is connected to the connecting water pipe through a pipe to achieve communication with the water outlet.

4. The spiral plate heat exchanger system with backflushing according to claim 1, characterized in that, The top of the receiving compartment is recessed to form an installation cavity, in which a cleaning agent box is detachably installed. The cleaning agent box is equipped with a delivery pipe, and the spiral flow channel is connected to the pipe of the connecting water pipe and the delivery pipe.

5. The spiral plate heat exchanger system with backflushing according to claim 3, characterized in that, The spiral flow channel is connected to the pipe of the connecting water pipe and is equipped with a liquid turbidity detection component. The liquid turbidity detection component includes a transfer box, a light emitter, and a light receiver. The liquid from the outlet passes through the transfer box and flows in a direction perpendicular to the liquid flow direction. The light emitter and the light receiver are arranged opposite each other on both sides of the transfer box.

6. The spiral plate heat exchanger system with backflushing according to claim 3, characterized in that, A liquid flow rate detection sensor is installed on the pipe connected to the connecting water pipe in the spiral flow channel. The liquid flow rate detection sensor is used to detect the flow rate of the liquid in real time.

7. The spiral plate heat exchanger system with backflushing according to claim 3, characterized in that, Inside the container, near the top wall of the container, a liquid level detection component is provided. The liquid detection component includes a float, a magnet, and a Hall sensor. An extension arm is provided on the outer wall of the float, and the extension arm is rotatably connected to the container. The magnet is located inside the float, and the Hall sensor is located on the container and near the float.

8. The spiral plate heat exchanger system with backflushing according to claim 1, characterized in that, It also includes a drive assembly and a self-cleaning assembly, wherein the drive assembly is used to drive the self-cleaning assembly to reciprocate within the receiving chamber, so as to clean the inner bottom wall of the receiving chamber using the self-cleaning assembly; The self-cleaning component includes a mounting base, a cleaning component, and a driving component. The mounting base is connected to the driving component. The mounting base has a receiving cavity on the side facing the inner bottom wall of the receiving compartment. The cleaning component is rotatably connected to the receiving cavity. The side of the cleaning component facing the inner bottom wall of the receiving compartment protrudes from the opening of the receiving cavity. The driving component is mounted on the mounting base and is used to drive the cleaning component to rotate.

9. The spiral plate heat exchanger system with backflushing according to claim 8, characterized in that, The inner wall of the receiving cavity is provided with water spray holes, and there are multiple water spray holes. The mounting base is provided with a clean water channel communicating with the water spray holes. The end of the clean water channel away from the water spray holes passes through the outer wall of the mounting base and is connected to a clean water pipe. The clean water pipe is connected to an external water source. The self-cleaning component also includes a wastewater tank and a negative pressure device. The wastewater tank is located outside the receiving chamber and is connected to the negative pressure device, which is used to create a negative pressure inside the wastewater tank. A suction port is provided on the inner wall of the receiving cavity. A wastewater flow channel communicating with the suction port is provided inside the mounting base. The end of the wastewater flow channel away from the suction port passes through the outer wall of the mounting base and is connected to a wastewater pipe, which is connected to the wastewater tank. A scraping strip and a baffle are provided on the inner wall of the receiving cavity. The suction port is located between the scraping strip and the baffle, along the rotation direction of the cleaning component. The baffle is located upstream of the scraping strip. The scraping strip and the cleaning component are in an interference fit, and the baffle is spaced out. Along the rotation direction of the cleaning component, the water inlet is located upstream of the water spray hole. During the rotation of the cleaning component, the water spray hole sprays clean water onto the cleaning component to clean the inner bottom wall of the receiving chamber while the cleaning component is wet. Subsequently, the cleaning component continues to rotate and is scraped by the scraping strip. The sewage inside the cleaning component is scraped away into the cavity between the scraping strip and the baffle. Under the negative pressure of the sewage tank, the sewage located between the scraping strip and the baffle is sucked into the sewage tank through the water inlet.

10. The spiral plate heat exchanger system with backflushing according to claim 8, characterized in that, The mounting base includes a first base and a second base. The cleaning component and the driving component are both connected to the second base. The first base is connected to the driving component. A mounting plate is fixed on the first base. A lifting component is fixed on the mounting plate. The telescopic end of the lifting component is fixedly connected to the second base.

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