Condensate polishing system backflush apparatus

Abstract

The utility model provides a kind of condensate water fine treatment system backflushing equipment, including being set in the liquid collecting tank of fine filter tank one side, the top of the fine filter tank is fixedly installed with the water injection pipe being connected with its inside, bottom fixedly installed with the drain pipe being connected with its inside;The water injection pipe is located at the side of fine filter tank upper portion and is close to the through connection of water pipe of liquid collecting tank, through connection is connected on water pipe and flushes water pipe, and electromagnetic valve one is fixedly installed on flush water pipe.This utility model is backflushed to front filter, by driving member, make mounting plate slide down along telescopic link, make scraping component and circular cavity inner bottom wall contact, it can use scraping component to scrape and clean circular cavity inner bottom wall, effectively avoid impurity to deposit on circular cavity inner bottom wall in stationary state, cause to drain hole plugging, to affect the situation of water source to drain hole discharge, it is beneficial to waste liquid to flow down, improve waste liquid fluidity.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically to a backflushing device for a condensate polishing system. Background Technology

[0002] Condensate polishing equipment is a key water treatment device in thermal power plants, nuclear power plants, and large industrial boiler systems. It is mainly used to purify turbine condensate, removing dissolved impurities and particulate contaminants to ensure high purity boiler feedwater and prevent scaling, corrosion, and salt buildup in thermal equipment. Existing condensate polishing systems typically employ a combination of a pre-filter and a mixed-bed ion exchanger. The pre-filter removes suspended solids from the condensate to protect the subsequent mixed-bed resin from contamination.

[0003] During the use of condensate polishing equipment, the pre-filter at the front end of the condensate polishing equipment needs to be backwashed regularly to ensure its long-term stable operation and maintain high-efficiency filtration performance.

[0004] Currently, during the backwashing of the pre-filter, the waste liquid from the backwash is discharged into a waste liquid tank for storage, to be processed later. Some waste liquid tanks are equipped with a filtration mechanism to filter the waste liquid and impurities, facilitating subsequent processing. However, during the backwashing of the pre-filter, after the filtration mechanism filters the impurities, the impurities accumulate on the surface of the filtration mechanism, which affects the discharge of waste liquid through the filtration mechanism and reduces the flowability of the waste liquid. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a backflushing device for a condensate polishing system, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A backflushing device for a condensate polishing system includes a collection tank located on one side of a fine filter tank. The top of the fine filter tank is fixedly installed with a water injection pipe connected to its interior, and the bottom is fixedly installed with a drain pipe connected to its interior.

[0008] The water injection pipe is located above the fine filter tank and is connected to a water supply pipe on the side near the collection tank. A flushing pipe is connected to the water supply pipe, and a solenoid valve one is fixedly installed on the flushing pipe. A solenoid valve two is fixedly installed on the water supply pipe on the side of the flushing pipe near the water injection pipe. A pre-filter is fixedly installed at the end of the water supply pipe away from the water injection pipe via a flange. An inlet pipe connected to the other end of the pre-filter is fixedly installed via a flange. An outlet pipe is fixedly installed at the bottom of the inlet pipe above the collection tank. The bottom of the outlet pipe is connected to the top of the collection tank. A solenoid valve three is fixedly installed on the outlet pipe. A solenoid valve four is fixedly installed on the inlet pipe on the side of the outlet pipe away from the pre-filter.

[0009] The liquid collection tank has a slot on one side that is connected to its interior. A filter frame for sealing the interior of the liquid collection tank is inserted on the liquid collection tank along the opening end of the slot. A circular cavity is opened at the top of the filter frame, and several drainage holes that are connected to the interior of the circular cavity are opened at the bottom of the filter frame. A drain pipe connected to its interior is fixedly installed at the bottom of one side of the liquid collection tank, and a valve is fixedly installed on the drain pipe.

[0010] A vertical telescopic rod is fixedly installed on the top wall of the liquid collection tank. A horizontal mounting plate is fixedly installed at the bottom of the telescopic rod. The mounting plate can extend into the circular cavity. A driving component connected to the mounting plate is installed on the liquid collection tank. It is used to make the mounting plate slide along the telescopic rod or stop sliding. A scraping component for scraping the bottom wall of the circular cavity is installed on the mounting plate.

[0011] Furthermore: the driving component includes a threaded rod that is vertically rotatably mounted on the collection tank, a vertical housing that is fixedly mounted on the top of the mounting plate, the bottom thread of the threaded rod passing through the top of the housing, and a motor for driving the threaded rod to rotate that is fixedly mounted on the collection tank.

[0012] Furthermore: the scraping assembly includes a vertically oriented rotating rod rotatably mounted on the mounting plate, with a horizontally oriented scraper fixedly mounted at the bottom of the rotating rod. When the mounting plate extends into the circular cavity, both ends of the scraper are in contact with the cross-section between the inner sidewall of the circular cavity. A driving component for driving the rotating rod to rotate is installed at one end of the water outlet pipe extending into the collection tank.

[0013] Furthermore: the driving component includes a horizontal plate fixedly installed on the inner wall of one end of the water outlet pipe extending into the collection tank. There are notches on both sides of the horizontal plate and the inner wall of the water outlet pipe. A vertical rotating rod is rotatably installed on the horizontal plate. An impeller is coaxially fixed to the top of the rotating rod. The outer wall of the impeller is in contact with the inner wall of the water outlet pipe. A vertical square rod is fixedly installed at the bottom of the rotating rod. The bottom of the square rod movably passes through the top of the rotating rod and is in contact with the cross section of the rotating rod.

[0014] Furthermore, handles are symmetrically and fixedly installed on the filter frame and on the outside of the collection tank.

[0015] Furthermore, the outer wall of the collection tank and directly above the two handles are hinged with limit rods. When the filter frame is inserted into the slot, the two limit rods can respectively abut against the side of the two handles away from the filter frame.

[0016] Furthermore: an annular sealing groove is provided on the inner sidewall of the slot near its opening end, and an annular sealing gasket is fixedly installed on the liquid collection tank within the annular sealing groove. When the filter frame is inserted into the slot, the outer sidewall of the filter frame and the inner sidewall of the annular sealing gasket come into contact.

[0017] This invention provides a backflushing device for a condensate polishing system. Compared with the prior art, it has the following advantages:

[0018] 1. When backflushing the pre-filter, the mounting plate slides down along the telescopic rod through the drive component, so that the scraping component contacts the bottom wall of the circular cavity. The scraping component can then scrape and clean the bottom wall of the circular cavity, effectively preventing impurities from accumulating on the bottom wall of the circular cavity when it is stationary, which would block the drain hole and affect the water source from being discharged through the drain hole. This is beneficial for the downward flow of waste liquid and improves the fluidity of waste liquid.

[0019] 2. The handle design allows for easy removal of the filter frame by pulling it out of the slot using two handles.

[0020] 3. Through the design of the annular sealing gasket, when the filter frame is inserted into the slot, the outer wall of the filter frame and the inner wall of the annular sealing gasket form a contact, thereby increasing the fit between the filter frame and the collection tank and increasing the sealing between the filter frame and the collection tank. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown;

[0023] Figure 2 A schematic diagram of the installation structure of the filter frame of this utility model is shown;

[0024] Figure 3 A schematic diagram of the internal structure of the filter frame of this utility model is shown;

[0025] Figure 4 This utility model illustrates Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 This utility model illustrates Figure 3 Enlarged view of point B in the middle;

[0027] Figure 6 A schematic diagram of the installation structure of the limiting rod of this utility model is shown;

[0028] The diagram shows: 1. Fine filter tank; 11. Water inlet pipe; 12. Drain pipe; 2. Collection tank; 21. Slot; 211. Annular sealing groove; 22. Drain pipe; 221. Valve; 23. Telescopic rod; 24. Mounting plate; 3. Water inlet pipe; 31. Flushing pipe; 311. Solenoid valve one; 32. Solenoid valve two; 33. Solenoid valve three; 34. Pre-filter; 35. Water inlet pipe; 351. Solenoid valve four; 36. Water outlet pipe; 4. Filter frame; 41. Circular cavity; 42. Drain hole; 43. Handle; 5. Drive component; 51. Threaded rod; 52. Housing; 53. Motor; 6. Scraper assembly; 61. Rotating rod; 62. Scraper; 63. Driving component; 631. Horizontal plate; 632. Rotating rod; 633. Impeller; 634. Square rod; 7. Limiting rod; 8. Annular sealing gasket. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] Example

[0031] To address the technical problems in the background section, the following backflushing device for a condensate polishing system is provided:

[0032] Combination Figures 1-6 As shown, the present invention provides a backflushing device for a condensate polishing system, including a collection tank 2 disposed on one side of a fine filter tank 1. The top of the fine filter tank 1 is fixedly installed with a water injection pipe 11 connected to its interior, and the bottom is fixedly installed with a drain pipe 12 connected to its interior. Specifically, the fine filter tank 1 is provided with a cation exchange resin layer and an anion exchange resin layer. The specific arrangement structure of the cation exchange resin layer and the anion exchange resin layer is prior art and is known to those skilled in the art. It is not within the scope of protection of this application and will not be described in detail here.

[0033] The water injection pipe 11 is located above the fine filter tank 1 and is connected to a water passage pipe 3 on the side near the collection tank 2. A flushing pipe 31 is connected to the water passage pipe 3. Specifically, the end of the flushing pipe 31 away from the water passage pipe 3 is connected to an external high-pressure water pump. A solenoid valve 311 is fixedly installed on the flushing pipe 31. A solenoid valve 32 is fixedly installed on the water passage pipe 3 on the side of the flushing pipe 31 near the water injection pipe 11. A front valve is fixedly installed on the end of the water passage pipe 3 away from the water injection pipe 11 via a flange. A filter 34 is installed. The other end of the filter 34 is fixedly installed with an inlet pipe 35 connected to it via a flange. The inlet pipe 35 is connected to an external water source pump. An outlet pipe 36 is fixedly installed at the bottom of the inlet pipe 35 and above the collection tank 2. The bottom of the outlet pipe 36 is connected to the top of the collection tank 2. A solenoid valve 33 is fixedly installed on the outlet pipe 36. A solenoid valve 351 is fixedly installed on the inlet pipe 35 and on the side of the outlet pipe 36 away from the filter 34.

[0034] The liquid collection tank 2 has a slot 21 that communicates with its interior on one side. A filter frame 4 for sealing the interior of the liquid collection tank 2 is inserted on the liquid collection tank 2 and along the opening end of the slot 21. A circular cavity 41 is opened at the top of the filter frame 4, and several drainage holes 42 that communicate with the interior of the circular cavity 41 are opened at the bottom of the filter frame 4. A drain pipe 22 that communicates with its interior is fixedly installed at the bottom of one side of the liquid collection tank 2. A valve 221 is fixedly installed on the drain pipe 22.

[0035] A vertical telescopic rod 23 is fixedly installed on the top wall of the liquid collection tank 2. A horizontal mounting plate 24 is fixedly installed at the bottom of the telescopic rod 23. The mounting plate 24 can extend into the circular cavity 41. A driving component 5 connected to the mounting plate 24 is installed on the liquid collection tank 2. It is used to make the mounting plate 24 slide along the telescopic rod 23 or stop sliding. A scraping component 6 for scraping the bottom wall of the circular cavity 41 is installed on the mounting plate 24.

[0036] In operation, solenoid valves 2 (32) and 4 (351) are opened, while solenoid valves 1 (311) and 3 (33) are closed. This allows the water to be treated to be transported through inlet pipe 35 to water pipe 3, and then through injection pipe 11 to the fine filter tank 1 for filtration. During this process, the pre-filter 34 filters out suspended solids in the water, leaving them at the front end of the pre-filter 34 inside inlet pipe 35. For backflushing the pre-filter 34, solenoid valves 2 (32) and 4 (351) are closed, while solenoid valves 1 (311) and 3 (33) are opened. An external high-pressure water pump supplies water to flushing pipe 31. The water enters flushing pipe 31 and flows along the direction of the pre-filter 34, then through inlet pipe 35 to outlet pipe 36, ultimately draining into collection tank 2. This backflushing effect removes impurities from the pre-filter 34 and flushes them to filter frame 4. Inside the circular cavity 41, water flows downward through the drain hole 42, while impurities remain inside the circular cavity 41, achieving a filtration effect. During this process, the driving component 5 causes the mounting plate 24 to slide downward along the telescopic rod 23, bringing the scraping component 6 into contact with the bottom wall of the circular cavity 41. The scraping component 6 can then scrape and clean the bottom wall of the circular cavity 41, effectively preventing impurities from accumulating on the bottom wall of the circular cavity 41 when it is stationary, thus avoiding blockage of the drain hole 42 and affecting the discharge of water through the drain hole 42. This facilitates the downward flow of waste liquid and improves its fluidity. When cleaning the impurities collected in the filter frame 4, which is inserted into the slot 21, the driving component 5 causes the mounting plate 24 to slide upward along the telescopic rod 23, positioning the scraping component 6 above the filter frame 4. This allows the filter frame 4 to be pulled out and disassembled, facilitating the cleaning of the impurities collected inside the filter frame 4.

[0037] Combination Figures 1-6 As shown, the driving component 5 includes a threaded rod 51 that is vertically rotatably mounted on the collection tank 2. A vertical housing 52 is fixedly mounted on the top of the mounting plate 24. The bottom thread of the threaded rod 51 passes through the top of the housing 52. A motor 53 for driving the threaded rod 51 to rotate is fixedly mounted on the collection tank 2. The motor 53 is powered by an external power source. In use, the motor 53 is turned on, and the output shaft of the motor 53 rotates, which drives the threaded rod 51 to rotate on the collection tank 2. The housing 52 moves spirally along the threaded rod 51, thereby driving the mounting plate 24 to slide along the telescopic rod 23. Since the threaded connection between the threaded rod 51 and the housing 52 has a self-locking property, the position of the mounting plate 24 can be fixed without controlling the motor 53 to rotate the threaded rod 51, which is convenient for control.

[0038] Combination Figures 1-6As shown, the scraping assembly 6 includes a vertically oriented rotating rod 61 rotatably mounted on the mounting plate 24. A horizontal scraper 62 is fixedly mounted at the bottom of the rotating rod 61. When the mounting plate 24 extends into the circular cavity 41, both ends of the scraper 62 are in contact with the cross-section between the inner sidewall of the circular cavity 41. The outlet pipe 36 extends into the collection tank 2, and a driving component 63 for driving the rotating rod 61 to rotate is installed at one end. In use, when backflushing the pre-filter 34, the control motor 53 drives the threaded rod 51 to rotate, causing the mounting plate 24 to rotate. 4. Slide the telescopic rod 23 downwards to drive the scraper 62 to move downwards, so that the scraper 62 contacts the bottom wall of the circular cavity 41. Then, use the driving component 63 to make the rotating rod 61 rotate on the mounting plate 24, which will drive the scraper 62 to rotate around the rotating rod 61 and scrape and clean the bottom wall of the circular cavity 41. This effectively avoids the accumulation of impurities that fall into the circular cavity 41 during the backwashing of the pre-filter 34, which would block the drain hole 42 at the bottom of the circular cavity 41 and affect the downward flow of water through the drain hole 42 during backwashing.

[0039] Combination Figures 1-6 As shown, the driving component 63 includes a horizontal plate 631 fixedly installed on the inner wall of one end of the outlet pipe 36 extending into the collection tank 2. There are notches on both sides of the horizontal plate 631 and between it and the inner wall of the outlet pipe 36. A vertical rotating rod 632 is rotatably mounted on the horizontal plate 631. An impeller 633 is coaxially fixed to the top of the rotating rod 632. The outer wall of the impeller 633 is in contact with the inner wall of the outlet pipe 36. A vertical square rod 634 is fixedly installed at the bottom of the rotating rod 632. The bottom of the square rod 634 movably passes through the top of the rotating rod 61 and is in contact with the cross-section of the rotating rod 61. In use, when the pre-filter 34 is backwashed, an external high-pressure water pump pumps water through the water pipe 331. When the water source is transported internally and flows downward through the outlet pipe 36 into the collection tank 2, the water source flows in the outlet pipe 36 and comes into contact with the impeller 633. The impeller 633 can then drive the rotating rod 632 to rotate, and the square rod 634 rotates around the rotating rod 632. Since the cross section between the square rod 634 and the rotating rod 61 is in close contact, the rotating rod 61 can be driven to rotate on the mounting plate 24. The bottom of the square rod 634 moves through the top of the rotating rod 61 without affecting the sliding displacement of the mounting plate 24 along the telescopic rod 23. Through the design of the impeller 633, when the water source flows in the outlet pipe 36, the impeller 633 can drive the rotating rod 632 to rotate, so that no additional driving force is required for the rotating rod 61.

[0040] Combination Figures 1-6 As shown, handles 43 are symmetrically fixedly installed on the filter frame 4 and on the outside of the liquid collection tank 2. The design of the handles 43 makes it easy to pull the filter frame 4 out of the slot 21 by using the two handles 43, which makes it easy to disassemble the filter frame 4.

[0041] Combination Figures 1-6As shown, the outer wall of the collection tank 2, directly above the two handles 43, is hinged with limiting rods 7. When the filter frame 4 is inserted into the slot 21, the two limiting rods 7 can respectively abut against the side of the two handles 43 away from the filter frame 4. Through the design of the limiting rods 7, when the filter frame 4 is inserted into the slot 21, the operator applies a rotational force to the two limiting rods 7 respectively, so that the two limiting rods 7 abut against the side of the two handles 43 away from the filter frame 4. Thus, the filter frame 4 inserted into the slot 21 can be limited by the two handles 43. When it is necessary to disassemble the filter frame 4, the operator applies a rotational force to the two limiting rods 7 respectively, so that the two limiting rods 7 are located outside the two handles 43. The filter frame 4 can then be pulled out of the slot 21 by the two handles 43. The operation is simple.

[0042] Combination Figures 1-6 As shown, an annular sealing groove 211 is provided on the inner sidewall of the slot 21 near its opening end. An annular sealing gasket 8 is fixedly installed on the liquid collection tank 2 within the annular sealing groove 211. The annular sealing gasket 8 is made of rubber. When the filter frame 4 is inserted into the slot 21, the outer sidewall of the filter frame 4 and the inner sidewall of the annular sealing gasket 8 form contact. Through the design of the annular sealing gasket 8, when the filter frame 4 is inserted into the slot 21, the outer sidewall of the filter frame 4 and the inner sidewall of the annular sealing gasket 8 form contact, thereby increasing the fit between the filter frame 4 and the liquid collection tank 2 and increasing the sealing between the filter frame 4 and the liquid collection tank 2.

[0043] Working principle and usage process of this utility model:

[0044] In the first step, when backflushing the pre-filter 34, control solenoid valves 32 and 351 to close, and control motor 53 to open. The rotation of the output shaft of motor 53 drives the threaded rod 51 to rotate on the collection tank 2, causing the mounting plate 24 to slide downward along the telescopic rod 23. This causes the scraper 62 to move downward, making it contact the bottom wall of the circular cavity 41. An external high-pressure water pump delivers water to the flushing pipe 31. After entering the flushing pipe 31, the water flows along the direction of the pre-filter 34 and then through the inlet pipe 35 to the outlet pipe 36, thus being discharged into the collection tank 2. This achieves the backflushing effect of the pre-filter 34, flushing impurities into the circular cavity 41 of the filter frame 4. The water then drains through the drain. The water flows downward through the hole 42, and impurities remain in the circular cavity 41, achieving the effect of filtering impurities. During this process, when the water source flows downward through the outlet pipe 36 into the collection tank 2, the water source flows in the outlet pipe 36 and contacts the impeller 633. The impeller 633 drives the rotating rod 632 to rotate, and the square rod 634 rotates around the rotating rod 632. Since the cross section between the square rod 634 and the rotating rod 61 is in contact, the rotating rod 61 can be driven to rotate on the mounting plate 24, which drives the scraper 62 to rotate around the rotating rod 61, scraping and cleaning the bottom wall of the circular cavity 41. This effectively prevents impurities that fall into the circular cavity 41 during the backwashing process of the pre-filter 34 from accumulating at the bottom of the circular cavity 41 and blocking the drain hole 42.

[0045] The second step is to clean the impurities collected in the filter frame 4. The control motor 53 is turned on, and the output shaft of the motor 53 rotates, which drives the threaded rod 51 to rotate on the liquid collection tank 2. This causes the mounting plate 24 to slide upward along the telescopic rod 23, and the scraper 62 to move above the filter frame 4. Personnel apply rotational force to the two limit rods 7 respectively, so that the two limit rods 7 are located outside the two handles 43 respectively. The filter frame 4 can then be pulled out of the slot 21 through the two handles 43 to disassemble the filter frame 4.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A backflushing device for a condensate polishing system, characterized in that: It includes a collection tank located on one side of the fine filter tank, wherein a water injection pipe connected to the interior of the fine filter tank is fixedly installed on the top and a drain pipe connected to the interior of the fine filter tank is fixedly installed on the bottom. The water injection pipe is located above the fine filter tank and is connected to a water supply pipe on the side near the collection tank. A flushing pipe is connected to the water supply pipe, and a solenoid valve one is fixedly installed on the flushing pipe. A solenoid valve two is fixedly installed on the water supply pipe on the side of the flushing pipe near the water injection pipe. A pre-filter is fixedly installed at the end of the water supply pipe away from the water injection pipe via a flange. An inlet pipe connected to the other end of the pre-filter is fixedly installed via a flange. An outlet pipe is fixedly installed at the bottom of the inlet pipe above the collection tank. The bottom of the outlet pipe is connected to the top of the collection tank. A solenoid valve three is fixedly installed on the outlet pipe. A solenoid valve four is fixedly installed on the inlet pipe on the side of the outlet pipe away from the pre-filter. The liquid collection tank has a slot on one side that is connected to its interior. A filter frame for sealing the interior of the liquid collection tank is inserted on the liquid collection tank along the opening end of the slot. A circular cavity is opened at the top of the filter frame, and several drainage holes that are connected to the interior of the circular cavity are opened at the bottom of the filter frame. A drain pipe connected to its interior is fixedly installed at the bottom of one side of the liquid collection tank, and a valve is fixedly installed on the drain pipe. A vertical telescopic rod is fixedly installed on the top wall of the liquid collection tank. A horizontal mounting plate is fixedly installed at the bottom of the telescopic rod. The mounting plate can extend into the circular cavity. A driving component connected to the mounting plate is installed on the liquid collection tank. It is used to make the mounting plate slide along the telescopic rod or stop sliding. A scraping component for scraping the bottom wall of the circular cavity is installed on the mounting plate.

2. The backflushing device for a condensate polishing system according to claim 1, characterized in that: The driving component includes a threaded rod that is vertically rotatably mounted on the collection tank. A vertical housing is fixedly mounted on the top of the mounting plate. The bottom thread of the threaded rod passes through the top of the housing. A motor for driving the threaded rod to rotate is fixedly mounted on the collection tank.

3. The backflushing device for a condensate polishing system according to claim 1, characterized in that: The scraping assembly includes a vertically oriented rotating rod rotatably mounted on a mounting plate. A horizontal scraper is fixedly mounted at the bottom of the rotating rod. When the mounting plate extends into the circular cavity, both ends of the scraper are in contact with the cross-section between the inner sidewall of the circular cavity. A driving component for driving the rotating rod to rotate is installed at one end of the water outlet pipe extending into the collection tank.

4. The backflushing device for a condensate polishing system according to claim 3, characterized in that: The driving component includes a horizontal plate fixedly installed on the inner wall of one end of the water outlet pipe extending into the collection tank. There are notches on both sides of the horizontal plate and the inner wall of the water outlet pipe. A vertical rotating rod is rotatably installed on the horizontal plate. An impeller is coaxially fixed to the top of the rotating rod. The outer wall of the impeller is in contact with the inner wall of the water outlet pipe. A vertical square rod is fixedly installed at the bottom of the rotating rod. The bottom of the square rod movably passes through the top of the rotating rod and is in contact with the cross section of the rotating rod.

5. The backflushing device for a condensate polishing system according to claim 1, characterized in that: The filter frame is symmetrically and fixedly installed on the outside of the collection tank.

6. The backflushing device for a condensate polishing system according to claim 5, characterized in that: Limiting rods are hinged to the outer wall of the collection tank and directly above the two handles. When the filter frame is inserted into the slot, the two limiting rods can respectively abut against the side of the two handles away from the filter frame.

7. The backflushing device for a condensate polishing system according to claim 1, characterized in that: An annular sealing groove is provided on the inner side wall of the slot near its opening end. An annular sealing gasket is fixedly installed on the liquid collection tank within the annular sealing groove. When the filter frame is inserted into the slot, the outer side wall of the filter frame and the inner side wall of the annular sealing gasket come into contact.

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