Condenser pressurization rubber ball cleaning system and method

Abstract

The invention relates to the technical field of condenser operation cleaning, and discloses a condenser pressurization rubber ball cleaning system and method.The cleaning system comprises a putting and recycling unit and a cleaning unit; the putting and recycling unit comprises a ball containing chamber, a small rubber ball storage tank, a large rubber ball storage tank and a suction pipe. One end of the suction pipe penetrates into the ball containing chamber, the other end of the suction pipe is divided into two branches, one branch is connected with the small rubber ball storage tank through the small rubber ball recovery valve, and the other branch is connected with the large rubber ball storage tank through the large rubber ball recovery valve; the small rubber ball storage tank and the large rubber ball storage tank are connected into the ball containing chamber through a small rubber ball supply valve and a large rubber ball supply valve respectively. The ball containing chamber is connected into a condenser water inlet pipeline through a rubber ball cleaning system water outlet valve. The cleaning unit comprises a rubber ball conveying pump and a rubber ball cleaning system water inlet valve; the cleaning unit is connected with a water outlet pipeline of the condenser and the ball containing chamber. Small / large rubber ball storage tanks and double recovery paths are adopted, the rubber ball cleaning thorough degree is improved, and rubber ball recovery is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of condenser operation and cleaning, and specifically relates to a condenser pressurized rubber ball cleaning system and method. Background Art

[0002] Condenser fouling is a common phenomenon in the operation of thermal power plants, which will significantly reduce the equipment performance. After the fouling layer is deposited on the inner wall of the cooling tube, a thermal resistance layer will be formed first, resulting in a decrease in the heat transfer coefficient, making the exhaust steam of the steam turbine unable to be fully condensed, and the decrease in vacuum directly affects the thermal efficiency of the unit. At the same time, as the fouling layer thickens, the reduction of the flow cross-sectional area will cause an increase in the flow pressure loss of the condensate water, and in severe cases, a water hammer phenomenon may occur, threatening the safety of the pipeline.

[0003] The currently widely used rubber ball cleaning technology has obvious limitations. Due to the dense structure of the carbonate fouling layer on the inner wall of the cooling tube, ordinary rubber balls are difficult to completely destroy its crystal structure; when the matching degree between the rubber ball diameter and the pipeline is insufficient, cleaning blind spots will appear; when the pressure of the circulating water system is low, the impact force of the rubber ball is not enough to peel off the stubborn fouling layer. These factors lead to the actual cleaning effect often not meeting the expectations, and the residual fouling layer will accelerate the secondary fouling process.

[0004] This incomplete cleaning situation will cause a chain reaction. The continuously accumulating uncleaned fouling layer will exacerbate the heat transfer deterioration, increase the end difference of the condenser, and increase the coal consumption of the unit. More seriously, an oxygen concentration difference cell will be formed in the occluded area under the fouling layer, inducing local corrosion perforation. In addition, the poor cleaning effect will shorten the maintenance cycle, increase the shutdown time and maintenance cost, and cause multiple adverse effects on the economic operation of the power plant. Summary of the Invention

[0005] To solve the existing problems, the present invention aims to provide a condenser pressurized rubber ball cleaning system and method, which can improve the thoroughness of rubber ball cleaning and realize the recycling of rubber balls through a design of independent small / large rubber ball storage tanks and double recovery paths, so as to improve the self-cleaning ability during the operation of the condenser; this system can be transformed based on the existing rubber ball cleaning system in the power plant, greatly reducing the implementation workload.

[0006] To achieve the above object, the present invention provides the following technical solutions.

[0007] The present invention provides a condenser pressurized rubber ball cleaning system, which includes a feeding and recycling unit and a cleaning unit; the feeding and recycling unit includes a ball storage chamber, a small rubber ball storage tank, a large rubber ball storage tank and a suction pipe; one end of the suction pipe penetrates into the ball storage chamber, and the other end of the suction pipe is divided into two branches. One branch is connected to the small rubber ball storage tank through a small rubber ball recovery valve, and the other branch is connected to the large rubber ball storage tank through a large rubber ball recovery valve; the small rubber ball storage tank and the large rubber ball storage tank are respectively connected to the ball storage chamber through a small rubber ball supply ball valve and a large rubber ball supply ball valve; the ball storage chamber is connected to the condenser inlet pipeline through a rubber ball cleaning system water outlet valve; the cleaning unit includes a rubber ball delivery pump and a rubber ball cleaning system water inlet valve; the cleaning unit is respectively connected to the condenser outlet pipeline and the ball storage chamber.

[0008] As a further improvement of the present invention, it further includes a booster pump water inlet valve, a booster pump water outlet valve and a booster pump; the water inlet of the booster pump is connected to the condenser outlet pipeline; the water outlet of the booster pump is connected to the condenser inlet pipeline.

[0009] As a further improvement of the present invention, it further includes a secondary filter and a ball collecting net; the secondary filter is located before the rubber ball cleaning system water outlet valve and after the booster pump water outlet valve in the direction of cooling water flow; the ball collecting net is located after the rubber ball cleaning system water inlet valve and before the inlet of the booster pump water inlet valve in the direction of cooling water flow.

[0010] As a further improvement of the present invention, the suction pipe penetrates into the ball storage chamber from the top.

[0011] As a further improvement of the present invention, it further includes a ball catching funnel; the ball catching funnel is arranged in the inner cavity of the ball storage chamber, and the ball catching funnel is connected to the lower end of the suction pipe; the wide part of the funnel opens downward.

[0012] As a further improvement of the present invention, the small rubber ball storage tank is provided with a small rubber ball drain valve, a small rubber ball perforated plate is arranged at the interface of the small rubber ball drain valve, and the aperture of the small rubber ball perforated plate is smaller than the diameter of the small rubber ball; the large rubber ball storage tank is provided with a large rubber ball drain valve, a large rubber ball perforated plate is arranged at the interface of the large rubber ball drain valve, and the aperture of the large rubber ball perforated plate is smaller than the diameter of the large rubber ball; the outlet pipelines of the large rubber ball drain valve and the small rubber ball drain valve are both connected to the condenser inlet pipeline.

[0013] As a further improvement of the present invention, it further includes a rubber ball collecting ball valve; the rubber ball collecting ball valve is arranged in the inner cavity of the ball storage chamber, and the rubber ball collecting ball valve is a butterfly valve.

[0014] As a further improvement of the present invention, the inlet of the rubber ball delivery pump is connected to the condenser outlet pipeline through a rubber ball cleaning system water inlet valve, and the outlet of the rubber ball delivery pump is connected to the ball storage chamber.

[0015] The present invention also provides a method for cleaning condenser pressurized rubber balls, which includes the following steps: Monitor the terminal difference of the condenser during the stable load period of the generator set. When the terminal difference of the condenser exceeds the set temperature T, first open the rubber ball collection ball valve and the small rubber ball supply ball valve. The small rubber balls fall into the inner cavity of the ball loading chamber, and then close the small rubber ball supply ball valve; Open the rubber ball collection ball valve; Subsequently, open the water inlet valve and the water outlet valve of the rubber ball cleaning system, start the rubber ball delivery pump, and the small-diameter rubber balls are circulated and cleaned in the condenser and the pressurized rubber ball cleaning system along with the cooling water flow; After circulating and cleaning for a period of time, when the terminal difference of the condenser still exceeds the set value T, close the rubber ball collection ball valve, open the small rubber ball recovery valve and the small rubber ball drain valve. After all the small rubber balls are recovered into the small rubber ball storage tank, stop the rubber ball delivery pump, close the small rubber ball recovery valve and the small rubber ball drain valve, and close the water inlet valve and the water outlet valve of the rubber ball cleaning system; Open the large rubber ball supply ball valve, the large rubber balls fall into the inner cavity of the ball loading chamber, close the large rubber ball supply ball valve, open the rubber ball collection ball valve, then open the water inlet valve and the water outlet valve of the rubber ball cleaning system, and start the rubber ball delivery pump; After the cleaning is completed, close the rubber ball collection ball valve, open the large rubber ball recovery valve and the large rubber ball drain valve. After all the large rubber balls are recovered into the large rubber ball storage tank, stop the rubber ball delivery pump, close the large rubber ball recovery valve and the large rubber ball drain valve, and close the water inlet valve and the water outlet valve of the rubber ball cleaning system; Stop the booster pump, and close the booster pump inlet valve and the booster pump outlet valve.

[0016] As a further improvement of the present invention, the set value T of the terminal difference is 3°C - 5°C.

[0017] The present invention has the following beneficial effects: Through the design of mutually independent small / large rubber ball storage tanks and double recovery paths, this system realizes the precise delivery and recovery of rubber balls of different sizes, avoiding the decrease in cleaning efficiency caused by mixing; The small / large rubber balls can be used for condensers with long-term scale that is not cleaned. The small rubber balls are used for initial cleaning and the large rubber balls are used for enhanced cleaning to achieve the effect of deep cleaning; The direct connection between the ball loading chamber and the condenser water inlet pipe simplifies the process of rubber balls entering the condenser and improves the system response speed; This system can strengthen the cleaning of the condenser cooling tubes without shutting down for high-pressure flushing or pickling; Strengthening the cleaning can improve the heat transfer efficiency of the condenser cooling tubes, reduce the operating resistance of the cooling water, and reduce the risk of under-deposit corrosion of the cooling tubes.

[0018] Preferably, the booster pump is connected in series between the condenser outlet and the inlet pipe, significantly enhancing the cooling water circulation pressure and strengthening the impact force of the small / large rubber balls on the condenser tube bundle. It is especially suitable for high-resistance or long-tube bundle scenarios when using large rubber balls, greatly improving the cleaning effect.

[0019] Preferably, the secondary filter screen intercepts impurities in advance to prevent small / large rubber balls from being blocked by foreign objects, and at the same time ensures that the small / large rubber balls enter the upstream of the condenser inlet pipe; the ball collecting net is located behind the inlet of the booster pump to prevent the small / large rubber balls from entering the downstream of the condenser outlet pipe, ensuring that the small / large rubber balls flow back to the cleaning unit with the cooling water, protecting the equipment safety doubly and extending the system life.

[0020] Preferably, the suction pipe penetrates into the ball storage chamber from the top, and the wide part of the ball catching funnel is designed with the opening facing downwards, expanding the effective absorption range of the suction pipe, improving the recovery efficiency and reducing the need for manual intervention, especially applicable to large condenser systems.

[0021] Preferably, the wide opening of the funnel is designed with the opening facing downwards to form a diversion area, accelerating the aggregation of rubber balls into the suction pipe.

[0022] Preferably, the interface of the storage tank drain valve is provided with a perforated plate with a pore diameter smaller than that of the rubber balls, realizing zero loss of rubber balls during drainage and avoiding the backflow of impurities at the same time.

[0023] Preferably, the butterfly valve is small in size and quick in opening and closing. Installed on the upper part of the ball storage chamber, it can directly control the recovery of small / large rubber balls. Cooperating with the ball catching funnel, it forms a fast ball collecting mechanism of "closing the valve and collecting immediately", shortening the system preparation time.

[0024] Preferably, the inlet of the rubber ball delivery pump is directly connected to the condenser outlet pipe to ensure that the small / large rubber balls enter the pump body naturally with the backflow of the cooling water; the outlet is connected to the ball storage chamber, forming a closed loop for rubber ball cleaning and recovery. The system pipeline is simple, and all the cooling water is recycled.

[0025] The booster rubber ball cleaning method of the present invention uses small / large rubber balls in stages. First, small rubber balls are used to treat mild scaling, and then large rubber balls are used to deal with stubborn stains, saving resources and improving the cleaning pertinence; the terminal difference monitoring trigger mechanism ensures the timeliness of cleaning and avoids excessive consumption; the circulating pipeline is pressurized, significantly enhancing the circulating power of the cooling water, strengthening the impact force of the rubber balls on the condenser tube bundle, and greatly improving the cleaning effect.

[0026] Preferably, the set value T of the terminal difference is 3°C - 5°C. This set value range is reasonable and can reflect the fouling situation of the condenser in time. When the terminal difference exceeds this range, the cleaning program is started, which can not only ensure the normal operation and heat transfer efficiency of the condenser, but also avoid the cost increase and equipment loss caused by frequent cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are for illustrative purposes only and do not limit the scope of the disclosure of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only schematic for helping the understanding of the present invention, and do not specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings: Figure 1Schematic diagram of a condenser pressurized rubber ball cleaning system in Embodiment 1; Figure 2 Flow chart of a condenser pressurized rubber ball cleaning method in Embodiment 1.

[0028] Among them, 1. Condenser; 2. Secondary filter; 3. Outlet valve of the rubber ball cleaning system; 4. Ball supply valve for small rubber balls; 5. Small rubber ball storage tank; 6. Drain valve for small rubber balls; 7. Recovery valve for small rubber balls; 8. Recovery valve for large rubber balls; 9. Drain valve for large rubber balls; 10. Large rubber ball storage tank; 11. Ball supply valve for large rubber balls; 12. Suction pipe; 13. Ball loading chamber; 14. Ball collection valve; 15. Rubber ball transfer pump; 16. Inlet valve of the rubber ball cleaning system; 17. Ball collection net; 18. Outlet valve of the booster pump; 19. Booster pump; 20. Inlet valve of the booster pump. Detailed implementation manners

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] Embodiment 1 As Figure 1As shown in the figure, this embodiment provides a pressurized rubber ball cleaning system for a condenser 1, which includes a feeding and recycling unit and a cleaning unit; the feeding and recycling unit includes a ball storage chamber 13, a small rubber ball storage tank 5, a large rubber ball storage tank 10 and a suction pipe 12; one end of the suction pipe 12 penetrates into the ball storage chamber 13 from the top, and the other end of the suction pipe 12 is divided into two branches. One branch is connected to the small rubber ball storage tank 5 through a small rubber ball recovery valve 7, and the other branch is connected to the large rubber ball storage tank 10 through a large rubber ball recovery valve 8; the small rubber ball storage tank 5 and the large rubber ball storage tank 10 are respectively connected to the ball storage chamber 13 through a small rubber ball supply ball valve 4 and a large rubber ball supply ball valve 11; the ball storage chamber 13 is connected to the condenser 1 inlet pipe through a rubber ball cleaning system water outlet valve 3; the cleaning unit includes a rubber ball transfer pump 15 and a rubber ball cleaning system water inlet valve 16; the cleaning unit is respectively connected to the condenser 1 outlet pipe and the ball storage chamber 13.

[0033] Both the large rubber balls and small rubber balls in this embodiment are made of rubber (EPDM / silicone). Specifically, the diameter of the small rubber balls is usually 1-2 mm larger than the inner diameter of the cooling tubes, and the diameter of the large rubber balls is usually 2-3 mm larger than the inner diameter of the cooling tubes.

[0034] A pressurized rubber ball cleaning system for a condenser 1 in this embodiment further includes a booster pump water inlet valve 20, a booster pump water outlet valve 18 and a booster pump 19; the water inlet of the booster pump 19 is connected to the condenser 1 outlet pipe; the water outlet of the booster pump 19 is connected to the condenser 1 inlet pipe. The booster pump water inlet valve 20, the booster pump water outlet valve 18 and the booster pump 19 form a booster pipeline connecting the condenser 1 inlet pipe and the condenser 1 outlet pipe.

[0035] Specifically, the booster pipeline can be arranged on the near side (as shown in Figure 1 the figure) or the far side (as shown in Figure 2 the figure) of the condenser 1 relative to the feeding and recycling unit and the cleaning unit. Arranging the booster pipeline on the near side can shorten the length of the booster pipeline, save energy and reduce consumption; arranging it on the far side helps to reduce the sudden change in the flow velocity of the cooling water flowing through the feeding and recycling unit, thereby improving the smoothness of the flow. Specifically, the booster pump 19 should be able to increase the water pressure of the cleaning system by 0.1 MPa.

[0036] In this embodiment, a condenser 1 booster ball cleaning system also includes a secondary filter 2 and a ball collection net 17. The secondary filter 2 is located before the ball cleaning system outlet valve 3 and after the booster pump outlet valve 18 in the cooling water flow direction. The ball collection net 17 is located after the ball cleaning system inlet valve 16 and before the inlet of the booster pump inlet valve 20 in the cooling water flow direction. Specifically, the secondary filter 2 and ball collection net 17 can be made of stainless steel mesh (304 / 316L). The secondary filter 2 intercepts impurities in advance, preventing small and large balls from becoming clogged by foreign matter while ensuring that they enter the upstream of the condenser inlet pipe. The ball collection net 17 is located after the inlet of the booster pump 19, preventing small and large balls from entering the downstream of the condenser outlet pipe, ensuring that they flow back to the cleaning unit with the cooling water, providing dual protection for equipment safety and extending system life.

[0037] A small rubber ball drainage pipeline is provided at the bottom of the small rubber ball storage tank 5, a small rubber ball drainage valve 6 is provided on the small rubber ball drainage pipeline, a small rubber ball porous plate is provided at the interface of the small rubber ball storage tank 5 on the small rubber ball drainage pipeline, and the aperture of the small rubber ball porous plate is smaller than the diameter of the small rubber ball; a large rubber ball drainage pipeline is provided at the bottom of the large rubber ball storage tank 10, a large rubber ball drainage valve 9 is provided on the large rubber ball drainage pipeline, a large rubber ball porous plate is provided at the interface of the large rubber ball storage tank 10, and the aperture of the large rubber ball porous plate is smaller than the diameter of the large rubber ball; the large rubber ball drainage pipeline and the small rubber ball drainage pipeline are both connected to the water inlet pipe of the condenser 1. The porous plate prevents the loss of small / large rubber balls when the storage tank is drained; when the small / large rubber ball tank is used to collect balls in the ball loading chamber 13, the cooling water is discharged along the drainage pipe, and the porous plate intercepts the small / large rubber balls; this design not only prevents the small / large rubber ball tank from being filled with cooling water, but also prevents the small / large rubber balls from being piled up in a disorderly manner, and facilitates subsequent cleaning or replacement, making the process more orderly.

[0038] In this embodiment, a pressurized rubber ball cleaning system for a condenser 1 further includes a rubber ball receiving valve 14, which is located at the bottom of the ball loading chamber 13. This butterfly valve is compact and quick to open and close. Installed at the bottom of the chamber 13, it directly controls the release of small and large rubber balls. Combined with the funnel, it forms a rapid, "open-and-drop" release mechanism, shortening system setup time. When the rubber ball receiving valve 14 is open, the disc is perpendicular to the bottom of the chamber 13. When the rubber ball receiving valve 14 is closed, the disc is parallel to the bottom of the chamber 13.

[0039] The ball transfer pump 15 is a specialized ball pump with filters installed at its inlet and outlet. The mesh size of the filters is slightly smaller than the diameter of the small balls. The mesh size of the inlet and outlet filters is slightly larger than the diameter of the large balls. This prevents debris from the small and large balls from entering the pump and damaging the equipment while allowing cooling water to flow freely, thus balancing cleaning efficiency and equipment protection.

[0040] The inlet of the rubber ball transfer pump 15 is connected to the outlet pipe of the condenser 1 through the water inlet valve 16 of the rubber ball cleaning system, and the outlet of the rubber ball transfer pump 15 is connected to the ball loading chamber 13.

[0041] As Figure 2 shown, this embodiment also discloses a method for cleaning rubber balls by boosting the pressure of the condenser 1, which includes the following steps: During the period when the load of the generating unit is stable, monitor the terminal difference of the condenser 1. When the terminal difference of the condenser 1 exceeds the set temperature T, first open the rubber ball collection ball valve 14 and the small rubber ball supply ball valve 4. The small rubber balls fall into the inner cavity of the ball loading chamber 13, and then close the small rubber ball supply ball valve 4; subsequently, open the water inlet valve 16 of the rubber ball cleaning system and the water outlet valve 3 of the rubber ball cleaning system, and start the rubber ball transfer pump 15. The small-diameter rubber balls are circulated and cleaned in the condenser 1 and the boosted rubber ball cleaning system along with the cooling water flow; After circulating and cleaning for a period of time, when the terminal difference of the condenser 1 still exceeds the set value T, close the rubber ball collection ball valve 14, open the small rubber ball recovery valve 7. After all the small rubber balls are recovered into the small rubber ball storage tank 5, stop the rubber ball transfer pump 15, close the small rubber ball recovery valve 7, close the water inlet valve 16 of the rubber ball cleaning system and the water outlet valve 3 of the rubber ball cleaning system; Open the large rubber ball supply ball valve 11, the large rubber balls fall into the inner cavity of the ball loading chamber 13, close the large rubber ball supply ball valve 11, open the rubber ball collection ball valve 14, then open the water inlet valve 16 of the rubber ball cleaning system and the water outlet valve 3 of the rubber ball cleaning system, and start the rubber ball transfer pump 15; After the cleaning is completed, close the rubber ball collection ball valve 14, open the large rubber ball recovery valve 8. After all the large rubber balls are recovered into the large rubber ball storage tank 10, stop the rubber ball transfer pump 15, close the large rubber ball recovery valve 8, close the water inlet valve 16 of the rubber ball cleaning system and the water outlet valve 3 of the rubber ball cleaning system; stop the booster pump 19, and close the booster pump inlet valve 20 and the booster pump outlet valve 18.

[0042] Embodiment 2 The difference between this embodiment and Embodiment 1 is that: It further includes a funnel; the funnel is arranged in the inner cavity of the ball loading chamber 13, and the funnel is connected to the lower end of the suction pipe 12; the wide part of the funnel opens downward.

[0043] Both the large rubber balls and the small rubber balls are made of engineering plastics (such as polyurethane).

[0044] It further includes a PLC; the PLC is electrically connected to the water outlet valve 3 of the rubber ball cleaning system, the small rubber ball supply ball valve 4, the small rubber ball recovery valve 7, the large rubber ball recovery valve 8, the large rubber ball supply ball valve 11, the rubber ball collection ball valve 14, the rubber ball transfer pump 15, the water inlet valve 16 of the rubber ball cleaning system, the booster pump outlet valve 18, the booster pump 19, and the booster pump inlet valve 20.

[0045] The funnel is inverted to form an inverted triangular structure. The wider bottom and narrower top are beneficial for the small / large rubber balls to flow back into the small / large rubber ball storage tank 10 along with the water flow when the ball loading chamber 13 is filled with water; it enables efficient recovery and reduces the need for manual intervention, especially suitable for large condenser 1 systems.

[0046] Engineering plastics are used to resist temperature and pressure, meeting the requirements of cyclic cleaning.

[0047] The PLC realizes the automatic control of the valve opening and closing according to the preset control logic. The preset control logic is based on the following method: During the period when the load of the generating unit is stable, monitor the terminal difference of the condenser 1. When the terminal difference of the condenser 1 exceeds the set temperature T, first open the rubber ball collection ball valve 14 and the small rubber ball supply ball valve 4 successively. The small rubber balls fall into the inner cavity of the ball loading chamber 13, and then close the small rubber ball supply ball valve 4; subsequently, open the water inlet valve 16 and the water outlet valve 3 of the rubber ball cleaning system, start the rubber ball conveying pump 15, and the small-diameter rubber balls circulate and clean in the condenser 1 and the pressurized rubber ball cleaning system along with the cooling water flow; After circulating and cleaning for a period of time, when the terminal difference of the condenser 1 still exceeds the set value T, close the rubber ball collection ball valve 14, open the small rubber ball recovery valve 7. After all the small rubber balls are recovered into the small rubber ball storage tank 5, stop the rubber ball conveying pump 15, close the small rubber ball recovery valve 7, close the water inlet valve 16 and the water outlet valve 3 of the rubber ball cleaning system; Open the large rubber ball supply ball valve 11, the large rubber balls fall into the inner cavity of the ball loading chamber 13, close the large rubber ball supply ball valve 11, open the rubber ball collection ball valve 14, then open the water inlet valve 16 and the water outlet valve 3 of the rubber ball cleaning system, and start the rubber ball conveying pump 15; After the cleaning is completed, close the rubber ball collection ball valve 14, open the large rubber ball recovery valve 8. After all the large rubber balls are recovered into the large rubber ball storage tank 10, stop the rubber ball conveying pump 15, close the large rubber ball recovery valve 8, close the water inlet valve 16 and the water outlet valve 3 of the rubber ball cleaning system; stop the booster pump 19, and close the booster pump inlet valve 20 and the booster pump outlet valve 18.

[0048] Specifically, the set value T of the terminal difference is usually 3°C - 5°C. This set value range is reasonable and can timely reflect the fouling condition of the condenser. When the terminal difference exceeds this range, the cleaning program is started, which can not only ensure the normal operation and heat exchange efficiency of the condenser, but also avoid the cost increase and equipment loss caused by frequent cleaning.

[0049] The pressurized rubber ball cleaning method of the present invention uses small / large rubber balls in stages. First, use small rubber balls to deal with mild scaling, and then use large rubber balls to deal with stubborn stains, which not only saves resources but also improves the cleaning pertinence; the terminal difference monitoring trigger mechanism ensures the timeliness of cleaning and avoids excessive consumption; the circulation pipeline is pressurized, significantly improving the cooling water circulation power, enhancing the impact force of the rubber balls on the condenser tube bundle, and greatly improving the cleaning effect.

[0050] The above embodiments are only one of the implementation manners capable of implementing the technical solution of the present invention. The scope of protection required by the present invention is not only limited by this embodiment, but also includes any changes, substitutions and other implementation manners that are easily conceivable by any person skilled in the art within the technical scope disclosed by the present invention.

Claims

1. A condenser pressurized rubber ball cleaning system, characterized in that, It includes a ball feeding and recycling unit and a cleaning unit; the ball feeding and recycling unit includes a ball loading chamber, a small rubber ball storage tank, a large rubber ball storage tank and a suction pipe; one end of the suction pipe penetrates into the ball loading chamber, and the other end of the suction pipe is divided into two branches. One branch is connected to the small rubber ball storage tank through a small rubber ball recovery valve, and the other branch is connected to the large rubber ball storage tank through a large rubber ball recovery valve; the small rubber ball storage tank and the large rubber ball storage tank are respectively connected to the ball loading chamber through a small rubber ball supply ball valve and a large rubber ball supply ball valve; the ball loading chamber is connected to the condenser inlet pipe through a rubber ball cleaning system water outlet valve; the cleaning unit includes a rubber ball delivery pump and a rubber ball cleaning system water inlet valve; the cleaning unit is respectively connected to the condenser outlet pipe and the ball loading chamber.

2. The condenser pressurized rubber ball cleaning system according to claim 1, wherein It also includes a booster pump water inlet valve, a booster pump water outlet valve and a booster pump; the water inlet of the booster pump is connected to the condenser outlet pipe; the water outlet of the booster pump is connected to the condenser inlet pipe.

3. The condenser pressurized rubber ball cleaning system according to claim 2, wherein It also includes a secondary filter and a ball collecting net; the secondary filter is located before the rubber ball cleaning system water outlet valve and after the booster pump water outlet valve in the cooling water flow direction; the ball collecting net is located after the rubber ball cleaning system water inlet valve and before the inlet of the booster pump water inlet valve in the cooling water flow direction.

4. The condenser pressurized rubber ball cleaning system according to claim 1, wherein The suction pipe penetrates into the ball loading chamber from the top.

5. The condenser pressurized rubber ball cleaning system according to claim 1, characterized in that It also includes a ball catching funnel; the ball catching funnel is arranged in the inner cavity of the ball loading chamber, and the ball catching funnel is connected to the lower end of the suction pipe; the wide part of the funnel opens downward.

6. The condenser pressurized rubber ball cleaning system according to claim 1, characterized in that, The small rubber ball storage tank is provided with a small rubber ball drain valve, and a small rubber ball perforated plate is arranged at the interface of the small rubber ball drain valve. The aperture of the small rubber ball perforated plate is smaller than the diameter of the small rubber ball; the large rubber ball storage tank is provided with a large rubber ball drain valve, and a large rubber ball perforated plate is arranged at the interface of the large rubber ball drain valve. The aperture of the large rubber ball perforated plate is smaller than the diameter of the large rubber ball; the outlet pipelines of the large rubber ball drain valve and the small rubber ball drain valve are both connected to the condenser inlet pipe.

7. The condenser pressurized rubber ball cleaning system according to claim 1, characterized in that, It also includes a rubber ball collecting ball valve; the rubber ball collecting ball valve is arranged in the inner cavity of the ball loading chamber, and the rubber ball collecting ball valve is a butterfly valve.

8. The condenser pressurized rubber ball cleaning system according to claim 1, characterized in that, The inlet of the rubber ball delivery pump is connected to the condenser outlet pipe through a rubber ball cleaning system water inlet valve, and the outlet of the rubber ball delivery pump is connected to the ball loading chamber.

9. The method for cleaning a condenser by pressurizing rubber balls according to any one of claims 1-8, characterized in that, It includes the following steps: During the period when the load of the generating unit is stable, monitor the terminal difference of the condenser. When the terminal difference of the condenser exceeds the set temperature T, first open the rubber ball collecting ball valve and the small rubber ball supply ball valve, the small rubber balls fall into the inner cavity of the ball loading chamber, and then close the small rubber ball supply ball valve; open the rubber ball collecting ball valve; then open the rubber ball cleaning system water inlet valve and the rubber ball cleaning system water outlet valve, and start the rubber ball delivery pump. The small diameter rubber balls circulate and clean in the condenser and the booster rubber ball cleaning system along with the cooling water flow. After circulating and cleaning for a period of time, when the terminal difference of the condenser still exceeds the set value T, close the rubber ball collecting ball valve, open the small rubber ball recovery valve and the small rubber ball drain valve. After all the small rubber balls are recovered into the small rubber ball storage tank, stop the rubber ball delivery pump, close the small rubber ball recovery valve and the small rubber ball drain valve, and close the rubber ball cleaning system water inlet valve and the rubber ball cleaning system water outlet valve. Open the large rubber ball supply ball valve, the large rubber balls fall into the inner cavity of the ball loading chamber, close the large rubber ball supply ball valve, open the rubber ball collecting ball valve, then open the rubber ball cleaning system water inlet valve and the rubber ball cleaning system water outlet valve, and start the rubber ball delivery pump. After the cleaning is completed, close the rubber ball collecting ball valve, open the large rubber ball recovery valve and the large rubber ball drain valve. After all the large rubber balls are recovered into the large rubber ball storage tank, stop the rubber ball conveying pump, close the large rubber ball recovery valve and the large rubber ball drain valve, and close the water inlet valve and the water outlet valve of the rubber ball cleaning system; stop the booster pump and close the inlet valve and the outlet valve of the booster pump.

10. The method for cleaning a condenser by pressurizing rubber balls as described in claim 9, characterized in that, The set value T of the terminal temperature difference is 3°C - 5°C.

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