Condenser cleaning device and method

Abstract

The application relates to the technical field of cleaning equipment and discloses a condenser cleaning device and method, wherein a water inlet pipe and a water outlet pipe are connected to a condenser body, first valve bodies are arranged on the water inlet pipe and the water outlet pipe; heat exchange pipes are arranged in the condenser body, the water inlet pipe and the water outlet pipe are communicated through the heat exchange pipes; a blowdown pipe is further arranged on the condenser and communicated with the heat exchange pipes, and the device comprises a cleaning water tank, a cleaning water pipe and a backwater pipe; the cleaning water pipe is communicated with the cleaning water tank, a pump body is arranged on the cleaning water pipe, the cleaning water pipe is communicated with the blowdown pipe, one end of the backwater pipe is communicated with the water outlet pipe, and the other end of the backwater pipe is communicated with the cleaning water tank. The condenser can be conveniently cleaned, and the cleaning workload is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning equipment, in particular to a condenser cleaning device and method. Background Art

[0002] At present, the condenser supporting the steam turbine generator set is an important device of the unit. The steam generated by the boiler drives the impeller of the generator to rotate and drive the generator to generate electricity. The steam passing through the impeller enters the condenser. A plurality of heat exchange tubes are provided in the condenser. The incoming steam is heat-exchanged through the heat exchange tubes, and the steam condenses into water and returns to the boiler through a pipeline for circulation. The steam pressure in the condenser needs to be maintained above a predetermined vacuum pressure (-73 kPa) to ensure the normal operation of the steam turbine generator set.

[0003] During the heat exchange process of the heat exchange tubes in the condenser, due to various factors such as poor quality of the circulating water for heat exchange, scale will form on the inner wall of the heat exchange tubes, reducing the heat exchange efficiency of the condenser, resulting in the pressure in the condenser being greater than the predetermined pressure, and ultimately reducing the power generation of the steam turbine generator.

[0004] The conventional methods for cleaning the condenser are physical cleaning and chemical cleaning. The physical cleaning method is to use a high-pressure water gun to wash the heat exchange tube bundle by opening the condenser end cover during the shutdown of the unit, but the cleaning effect is not good. The chemical cleaning method is to add chemical cleaning agents into the condenser by opening the condenser end cover after a long shutdown time of the unit for pickling and caustic washing, and the cleaning workload is large. Summary of the Invention

[0005] The object of the present invention is to provide a cleaning device and method that can facilitate the cleaning of the condenser and reduce the cleaning workload.

[0006] To achieve the above object, on the one hand, the present invention provides a condenser cleaning device. The condenser body is connected with a water inlet pipe and a water outlet pipe, and first valves are provided on both the water inlet pipe and the water outlet pipe; heat exchange tubes are provided in the condenser body, and the water inlet pipe and the water outlet pipe are connected through the heat exchange tubes; a sewage discharge pipe is further provided on the condenser, and the sewage discharge pipe is connected with the heat exchange tubes, including: a cleaning water tank, a cleaning water pipe, and a return water pipe;

[0007] The cleaning water pipe is connected with the cleaning water tank, and a pump body is provided on the cleaning water pipe; the cleaning water pipe is connected with the sewage discharge pipe; one end of the return water pipe is connected with the water outlet pipe; the other end of the return water pipe is connected with the cleaning water tank.

[0008] Among them, a valve is also provided on the sewage discharge pipe, which is in a closed state during the operation of the condenser and is opened only when cleaning the heat exchange tubes of the condenser to be connected with the cleaning water pipe.

[0009] Compared with the prior art, the condenser cleaning device has the beneficial effects that: the cleaning water tank is arranged to store cleaning water, the cleaning water pipe is directly connected with the blowdown pipe, the length of the cleaning water pipe is saved, and the situation that a through hole is newly opened on the condenser to communicate with the heat exchange pipe is avoided; the backwater pipe is communicated with the water outlet pipe, the length of the backwater pipe is saved, and the situation that a through hole is newly opened on the condenser to communicate with the heat exchange pipe is avoided, the blowdown pipe and the water outlet pipe of the condenser are fully utilized, the structure is simple, and when the heat exchange pipe needs to be cleaned, only the first valve body needs to be closed and the pump body needs to be started, and the cleaning water is introduced into the heat exchange pipe, so that the heat exchange pipe can be cleaned. The operation is convenient, and the cleaning workload of workers is small.

[0010] Further, an opening is formed in the top of the cleaning water tank. The opening is arranged to facilitate workers to put corresponding medicaments and water into the cleaning water tank.

[0011] Further, a sewage pipe is communicated with the bottom of the cleaning water tank, and a blowdown valve is arranged on the sewage pipe. The sewage pipe is arranged to facilitate the discharge of the cleaning water after cleaning. The control valve can control the sewage pipe to discharge the cleaning water at a suitable time.

[0012] Specifically, the sewage pipe is communicated with the pipe network of the sewage treatment tank. The random discharge of the cleaning water is avoided, and environmental pollution is caused.

[0013] Further, an overflow pipe is arranged on the upper portion of the cleaning water tank, one end of the overflow pipe is communicated with the cleaning water tank, and the other end of the overflow pipe is communicated with the sewage pipe. The overflow pipe can avoid the situation that too much cleaning water causes the cleaning water to overflow from the cleaning water tank. The environment around the cleaning water tank is ensured to be clean, and the overflow cleaning water directly enters the sewage pipe network through the sewage pipe.

[0014] Further, the second valve body is arranged on the cleaning water pipe and the backwater pipe. The second valve body is arranged to facilitate the control of the flow of the cleaning water, and timely closing or opening of the cleaning water pipe and the backwater pipe.

[0015] On the other hand, the application also provides a condenser cleaning method, which comprises the following steps:

[0016] S1, starting the pump body; the cleaning liquid in the cleaning water tank is sequentially passed through the cleaning water pipe, the blowdown pipe, the heat exchange pipe, the water outlet pipe, the backwater pipe, and finally returns to the cleaning water tank to form a circulation;

[0017] S2, adding a first predetermined amount of corrosion inhibitor into the cleaning water tank; cleaning for a first predetermined time by using the corrosion inhibitor;

[0018] S3, adding a second predetermined amount of scale remover into the cleaning water tank; cleaning for a second predetermined time by using the scale remover;

[0019] S4, adding a third predetermined amount of corrosion inhibitor into the cleaning water tank; cleaning with the corrosion inhibitor for a third predetermined time;

[0020] S5, adding a fourth predetermined amount of scale remover into the cleaning water tank; cleaning with the scale remover for a fourth predetermined time;

[0021] S6, after closing the pump body and the second valve body for a fifth predetermined time, starting the pump body and opening the second valve body;

[0022] S7, opening the blowdown valve.

[0023] In S1, the first valve body, the blowdown valve and the valve body need to be closed to avoid the cleaning water flowing out of the water outlet pipe, the sewage pipe and the blowdown pipe;

[0024] The first predetermined amount is 50kg to 200kg, and the first predetermined time is 30-100 minutes;

[0025] The second predetermined amount is 25kg to 100kg, and the second predetermined time is 20-60 minutes;

[0026] The third predetermined amount is 25kg to 100kg, and the third predetermined time is 10-50 minutes;

[0027] The fourth predetermined amount is 25kg to 75kg, and the fourth predetermined time is 20-50 minutes;

[0028] The fifth predetermined time is 80-240 minutes;

[0029] The corrosion inhibitor and the scale remover are acidic, and the corrosion inhibitor and the scale remover are added in multiple times to avoid the high concentration of the cleaning water in a short time caused by the large amount of the corrosion inhibitor and the scale remover added at one time, the high acidity and the strong corrosion, and the serious corrosion phenomenon of the cleaning water pipe, the blowdown pipe, the heat exchange pipe, the water outlet pipe, the backwater pipe and the cleaning water tank.

[0030] Compared with the prior art, the condenser cleaning method has the advantages that workers only need to add the corrosion inhibitor and the scale remover into the cleaning water tank according to certain steps, and adjust the corresponding concentration, the operation is convenient, and the workload is small; the corrosion inhibitor can soften the scale in the heat exchange pipe, the scale can be quickly removed by the subsequent scale remover, the corrosion inhibitor and the scale remover are alternately added, the scale can be repeatedly softened and removed, the scale can be completely removed, and the removal effect is improved; the pump body and the second valve body are closed to make the cleaning water stay in the heat exchange pipe, soak the scale, facilitate the subsequent complete flushing of the scale out of the heat exchange pipe, and finally open the blowdown valve to completely discharge the cleaning water into the sewage pipe network for unified treatment.

[0031] Further, the method further comprises the steps of: S61, adding a sixth predetermined amount of descaling agent into the cleaning water tank; and cleaning for a sixth predetermined time with the descaling agent. The descaling agent is added to supplement the concentration of the descaling agent in the cleaning water, so that the descaling agent can fully react with the scale and remove the scale.

[0032] Specifically, the sixth predetermined amount is 0 kg to 50 kg, and the sixth predetermined time is 5-50 minutes; the corresponding predetermined amount and the corresponding predetermined time are selected according to the different dirt levels of the heat exchange pipes, so that the cleaning effect can be guaranteed, and the use of the descaling agent and the cleaning time can be saved.

[0033] Further, the method further comprises the steps of: S62, adding a seventh predetermined amount of corrosion inhibitor into the cleaning water tank; and cleaning for a seventh predetermined time with the corrosion inhibitor. The corrosion inhibitor is added to supplement the concentration of the corrosion inhibitor in the cleaning water, so that the corrosion inhibitor can fully soften the scale.

[0034] Specifically, the seventh predetermined amount is 25 kg to 100 kg, and the seventh predetermined time is 10-20 minutes; the corresponding predetermined amount and the corresponding predetermined time are selected according to the different dirt levels of the heat exchange pipes, so that the cleaning effect can be guaranteed, and the use of the corrosion inhibitor and the cleaning time can be saved.

[0035] Further, the method further comprises the steps of: S63, adding an eighth predetermined amount of descaling agent into the cleaning water tank; and cleaning for an eighth predetermined time with the descaling agent. The added descaling agent is used to remove the scale softened by the corrosion inhibitor, so as to guarantee the concentration of the descaling agent in the cleaning water and completely remove the scale.

[0036] Specifically, the eighth predetermined amount is 0 kg to 25 kg, and the eighth predetermined time is 50-30 minutes; the corresponding predetermined amount and the corresponding predetermined time are selected according to the different dirt levels of the heat exchange pipes, so that the cleaning effect can be guaranteed, and the use of the descaling agent and the cleaning time can be saved.

[0037] Further, the corrosion inhibitor is a hydrochloric acid pickling corrosion inhibitor, and the descaling agent is an acidic descaling agent. The corrosion inhibitor has a wide distribution and a low price, and has a sufficient softening capacity for the scale. The acidic descaling agent can better remove the scale.

[0038] Specifically, the acidic descaling agent includes acetic acid, citric acid, glycolic acid, formic acid, lactic acid, phosphoric acid, sulfamic acid, and hydrochloric acid; and the hydrochloric acid pickling corrosion inhibitor includes hydrochloric acid, sulfuric acid, and sulfamic acid.

[0039] The dirt level (scale formation level) of the heat exchange pipes is determined according to the vacuum pressure of the condenser. The lower the vacuum pressure, the more serious the dirt condition, that is, the more corrosion inhibitors and descaling agents need to be put in, and the longer the cleaning time needs to be, so as to guarantee the cleaning effect. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1is a structure diagram of a cleaning device according to an embodiment of the present application;

[0041] Figure 2 is a flow chart of a first cleaning method according to an embodiment of the present application;

[0042] Figure 3 is a flow chart of a second cleaning method according to an embodiment of the present application;

[0043] Figure 4 is a flow chart of a third cleaning method according to an embodiment of the present application;

[0044] In the figure, 1 is a condenser; 11 is a water inlet pipe; 12 is a water outlet pipe; 13 is a sewage pipe; 14 is a first valve body; 15 is a heat exchange pipe; 16 is a steam inlet; 2 is a cleaning water tank; 21 is an opening; 3 is a cleaning water pipe; 4 is a backwater pipe; 5 is a pump body; 6 is a sewage pipe; 61 is a sewage valve; 7 is an overflow pipe; 8 is a second valve body. DETAILED DESCRIPTION

[0045] The specific embodiments of the present application will be further described in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0046] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0047] As shown in Figures 1-4 A condenser 1 cleaning device according to a preferred embodiment of the present application, the condenser body is connected with a water inlet pipe 11 and a water outlet pipe 12, the water inlet pipe 11 and the water outlet pipe 12 are both provided with a first valve body 14; the condenser 1 body is provided with a heat exchange pipe 15, the water inlet pipe 11 and the water outlet pipe 12 are communicated through the heat exchange pipe 15; the condenser is also provided with a sewage pipe 13, and the sewage pipe 13 is communicated with the heat exchange pipe 15, comprising: a cleaning water tank 2, a cleaning water pipe 3, a backwater pipe 4;

[0048] The cleaning water pipe 3 is communicated with the cleaning water tank 2, and the cleaning water pipe 3 is provided with a pump body 5; the cleaning water pipe 3 is communicated with the sewage pipe 13; one end of the backwater pipe 4 is communicated with the water outlet pipe 12; the other end of the backwater pipe 4 is communicated with the cleaning water tank 2.

[0049] The valve body is arranged on the blow-off pipe 13, is in a closed state when the condenser 1 is in operation, and is opened to communicate with the cleaning water pipe 3 when the heat exchange pipe 15 of the condenser 1 is cleaned.

[0050] The steam inlet 16 is arranged on the condenser 1, and the finished steam enters the condenser 1 from the steam inlet 16 to exchange heat with the heat exchange pipe 15.

[0051] Compared with the prior art, the condenser 1 cleaning device has the advantages that the cleaning water tank 2 is arranged to store cleaning water, the cleaning water pipe 3 is directly connected with the blow-off pipe 13, the length of the cleaning water pipe 3 is saved, and the cleaning water pipe 3 is prevented from being arranged on the condenser 1 to communicate with the heat exchange pipe 15; the backwater pipe 4 is connected with the water outlet pipe 12, the length of the backwater pipe 4 is saved, and the backwater pipe 4 is prevented from being arranged on the condenser 1 to communicate with the heat exchange pipe 15; the blow-off pipe 13 and the water outlet pipe 12 of the condenser 1 are fully utilized; the structure is simple; when the heat exchange pipe 15 needs to be cleaned, the first valve body 14 is closed, the pump body 5 is started, and the cleaning water is introduced into the heat exchange pipe 15, so that the heat exchange pipe 15 can be cleaned; the operation is convenient; and the cleaning workload of workers is small.

[0052] In one embodiment, an opening 21 is arranged on the top of the cleaning water tank. The opening 21 is arranged to facilitate workers to put corresponding medicaments and water into the cleaning water tank.

[0053] In one embodiment, the bottom of the cleaning water tank is connected with a sewage pipe 6, and the sewage pipe 6 is provided with a blow-off valve 61. The sewage pipe 6 is arranged to facilitate the discharge of the cleaning water after cleaning. The control valve can control the sewage pipe 6 to discharge the cleaning water at a suitable time.

[0054] Specifically, the sewage pipe 6 is connected with the pipe network of the sewage treatment pool. The discharge of the cleaning water is prevented, and environmental pollution is avoided.

[0055] In one embodiment, the upper portion of the cleaning water tank is provided with an overflow pipe 7; one end of the overflow pipe 7 is connected with the cleaning water tank, and the other end of the overflow pipe 7 is connected with the sewage pipe 6. The overflow pipe 7 can prevent the cleaning water from overflowing out of the cleaning water tank due to excessive amount of the cleaning water. The surrounding environment of the cleaning water tank is kept clean, and the overflow cleaning water directly enters the sewage pipe 6 network through the sewage pipe 6.

[0056] In one embodiment, the cleaning water pipe 3 and the backwater pipe 4 are provided with second valve bodies 8. The second valve bodies 8 are arranged to facilitate the control of the flow of the cleaning water, and timely closing or opening of the cleaning water pipe 3 and the backwater pipe 4.

[0057] In one embodiment, as shown in FIG. 1, the cleaning water tank 2 is arranged on the condenser 1, and the cleaning water tank 2 is connected with the cleaning water pipe 3 and the backwater pipe 4. Figure 1As shown, the condenser 1 has two groups of heat exchange pipes 15, an inlet water pipe 11, an outlet water pipe 12 and a blowdown pipe 13; therefore the condenser 1 cleaning device also has two corresponding.

[0058] In another aspect, the present application also provides a condenser 1 cleaning method, comprising the following steps:

[0059] S1, start the pump body 5; the cleaning liquid in the cleaning water tank passes through the cleaning water pipe 3, the blowdown pipe 13, the heat exchange pipe 15, the outlet water pipe 12, the backwater pipe 4 in turn, and finally returns to the cleaning water tank 2 to form a cycle;

[0060] S2, add a first predetermined amount of corrosion inhibitor to the cleaning water tank 2; clean with the corrosion inhibitor for a first predetermined time;

[0061] S3, add a second predetermined amount of scale remover to the cleaning water tank 2; clean with the scale remover for a second predetermined time;

[0062] S4, add a third predetermined amount of corrosion inhibitor to the cleaning water tank 2; clean with the corrosion inhibitor for a third predetermined time;

[0063] S5, add a fourth predetermined amount of scale remover to the cleaning water tank 2; clean with the scale remover for a fourth predetermined time;

[0064] S6, after closing the pump body 5 and the second valve body 8 for a fifth predetermined time, start the pump body 5 and open the second valve body 8;

[0065] S7, open the blowdown valve 61.

[0066] In S1, the first valve body 14 and the blowdown valve 61 and the valve body need to be closed to prevent the cleaning water from flowing out of the outlet water pipe 12, the sewage pipe 6 and the blowdown pipe 13.

[0067] The first predetermined amount is 50kg to 200kg, and the first predetermined time is 30-100 minutes;

[0068] The second predetermined amount is 25kg to 100kg, and the second predetermined time is 20-60 minutes;

[0069] The third predetermined amount is 25kg to 100kg, and the third predetermined time is 10-50 minutes;

[0070] The fourth predetermined amount is 25kg to 75kg, and the fourth predetermined time is 20-50 minutes;

[0071] The fifth predetermined time is 80-240 minutes;

[0072] In the embodiment, the first predetermined amount and the second concentration are used in cooperation with each other, the concentration is relatively high, most of the scale on the heat exchange pipe 15 is cleaned, and the third predetermined amount and the fourth predetermined amount are adjusted in cooperation to clean the residual scale, so that the effect of fully cleaning the heat exchange pipe 15 is achieved. The content of the corrosion inhibitor and the scale remover in the cleaning water is adjusted multiple times, so that the pH value of the cleaning water can be controlled. The pH value is prevented from being too low to corrode the cleaning device and the heat exchange pipe 15, and the cleaning device and the heat exchange pipe 15 are prevented from being scrapped.

[0073] Specifically, after step S7 is performed, the cleaning water in the cleaning water tank 2 is replaced, the pump body 5 is started to continue to flush the heat exchange pipe 15, and finally the cleaning water is discharged; the pump body 5 is closed, the second valve body 8 is closed, and the first valve body 14 is opened, so that the condenser 1 can be normally used.

[0074] The corrosion inhibitor and the scale remover are acidic, and the corrosion inhibitor and the scale remover are added multiple times to avoid a large amount of one-time addition, which leads to a high concentration and causes a serious corrosion phenomenon of the cleaning water pipe 3, the blowdown pipe 13, the heat exchange pipe 15, the water outlet pipe 12, the backwater pipe 4 and the cleaning water tank 2.

[0075] Compared with the prior art, the condenser 1 cleaning method has the beneficial effects that: workers only need to add the corrosion inhibitor and the scale remover into the cleaning water tank 2 according to certain steps and adjust the corresponding concentration, the operation is convenient, and the workload is small; the corrosion inhibitor can soften the scale in the heat exchange pipe 15, so that the scale can be quickly removed by the subsequent scale remover, the corrosion inhibitor and the scale remover are alternately added, the scale can be repeatedly softened and removed, the scale is completely removed, and the removal effect is improved. The pump body 5 and the second valve body 8 are closed, so that the cleaning water can stay in the heat exchange pipe 15, soak the scale, and then the scale can be completely flushed out of the heat exchange pipe 15; finally, the blowdown valve 61 is opened to discharge all the cleaning water into the sewage pipe 6 for unified treatment.

[0076] In one embodiment, the method further includes the steps of: S61, adding a sixth predetermined amount of scale remover into the cleaning water tank 2; and S62, cleaning for a sixth predetermined time with the scale remover. The scale remover is added to supplement the concentration of the scale remover in the cleaning water, so that the scale remover can fully react with the scale and remove the scale. After the cleaning water soaks the scale in the heat exchange pipe 15 in step S6, the scale remover reacts with the scale and consumes part of the scale remover, and the scale remover is added again to ensure that the scale remover can fully react with the scale, so that the cleaning effect is ensured.

[0077] Specifically, the sixth predetermined amount is 0 kg to 50 kg, and the sixth predetermined time is 5-50 minutes; the corresponding predetermined amount and the corresponding predetermined time are selected according to the different dirt levels of the heat exchange pipe 15, so that the cleaning effect is ensured, the use of the scale remover is saved, and the cleaning time is saved.

[0078] In one embodiment, it further comprises the steps of: S62, adding a seventh predetermined amount of corrosion inhibitor into the cleaning water tank 2; cleaning with the corrosion inhibitor for a seventh predetermined time. The corrosion inhibitor is added to replenish the concentration of corrosion inhibitor in the cleaning water, so as to sufficiently soften the scale.

[0079] Specifically, the seventh predetermined amount is 25kg to 100kg, and the seventh predetermined time is 10-20 minutes; the corresponding predetermined amount and the corresponding predetermined time are selected according to the different dirtiness of the heat exchange tube 15, so as to ensure the cleaning effect while saving the use of corrosion inhibitor and saving the cleaning time.

[0080] In one embodiment, it further comprises the steps of: S63, adding an eighth predetermined amount of scale remover into the cleaning water tank 2; cleaning with the scale remover for an eighth predetermined time. The added scale remover removes the scale softened by the corrosion inhibitor, so as to ensure the concentration of scale remover in the cleaning water and ensure the complete removal of scale.

[0081] Specifically, the eighth predetermined amount is 0kg to 25kg, and the eighth predetermined time is 50-30 minutes; the corresponding predetermined amount and the corresponding predetermined time are selected according to the different dirtiness of the heat exchange tube 15, so as to ensure the cleaning effect while saving the use of scale remover and saving the cleaning time.

[0082] In one embodiment, the corrosion inhibitor is hydrochloric acid pickling corrosion inhibitor, and the scale remover is acidic scale remover. The corrosion inhibitor has wide distribution and low price, and has a satisfactory softening ability for scale. The scale remover can better remove scale.

[0083] Specifically, the acidic scale remover includes acetic acid, citric acid, glycolic acid, formic acid, lactic acid, phosphoric acid, sulfamic acid and hydrochloric acid; the hydrochloric acid pickling corrosion inhibitor includes hydrochloric acid, sulfuric acid and sulfamic acid.

[0084] In one embodiment, after the step 6 is performed, the worker observes the water quality. If the water flowing out of the return water pipe 4 does not change in value (no foam, no more stains, which indicates that the cleaning is complete), the worker can also open the end cover of the condenser 1 to observe the heat exchange tube 15. If there is no scale on the inner wall of the heat exchange tube 15, it indicates that the cleaning is complete. If scale is found, steps S4 and S5 can be repeated, or S61 can be performed, or S62 and S63 can be repeatedly performed.

[0085] In one embodiment, the volume of the cleaning water tank 2 and the volume of the heat exchange tube 15 in the condenser 1 are 7 cubic meters in total. One barrel of corrosion inhibitor is 25 liters (25 kilograms), and one bag of scale remover is 25 kilograms.

[0086] To obtain the first predetermined amount, only 2-8 barrels of corrosion inhibitor are put into the cleaning water tank 2;

[0087] To obtain the second predetermined amount, simply pour 1-4 bags of scale remover into the cleaning water tank 2;

[0088] To obtain the third predetermined amount, simply pour 1-4 barrels of corrosion inhibitor into the cleaning water tank 2;

[0089] To obtain the fourth predetermined amount, simply pour 1-3 bags of scale remover into the cleaning water tank 2;

[0090] To obtain the sixth predetermined amount, simply pour 0-2 bags of scale remover into the cleaning water tank 2;

[0091] To obtain the seventh predetermined amount, simply pour 1-3 barrels of corrosion inhibitor into the cleaning water tank 2;

[0092] To obtain the eighth predetermined amount, simply pour 0-1 bag of scale remover into the cleaning water tank 2;

[0093] The degree of fouling of the heat exchange pipe 15 (the degree of scale formation) is determined according to the vacuum pressure of the condenser 1. The lower the vacuum pressure, the more serious the fouling, i.e. the more corrosion inhibitor and scale remover need to be poured, and the longer the cleaning time, in order to ensure the cleaning effect.

[0094] Pouring the corrosion inhibitor and scale remover in multiple times can facilitate the control of the pH value of the cleaning water, and avoid the corrosion of the cleaning device and the heat exchange pipe 15 due to too low pH value, causing the scrapping of the cleaning device and the heat exchange pipe 15.

[0095] The following table is the relationship between the vacuum degree of the condensing steam turbine and the cleaning time of the condenser. As shown in the following table:

[0096]

[0097]

[0098]

[0099] As can be seen above, when the vacuum degree of the condenser 1 is greater than 73 KPa, it indicates that the scale formation of the heat exchange pipe 15 of the condenser 1 is small, and does not affect the normal work of the condenser 1. When the vacuum degree of the condenser 1 is less than 73 KPa, it indicates that the steam entering the condenser 1 cannot be condensed into liquid water in time, resulting in a decrease in the vacuum degree of the condenser 1, i.e. the scale in the heat exchange pipe 15 has a certain thickness, affecting the heat exchange efficiency, and needs to be cleaned. With the thickening of the scale in the heat exchange pipe 15, the amount of corrosion inhibitor and scale remover required also increases, and the cleaning time also increases accordingly, in order to ensure the complete cleaning of the scale in the heat exchange pipe 15.

[0100] In summary, the condenser 1 cleaning device and method provided by the embodiment of the present application only needs to put corrosion inhibitor and descaling agent into the cleaning water tank 2 according to certain steps, and adjust the corresponding concentration, which is convenient to operate and has small workload; the corrosion inhibitor can soften the scale in the heat exchange pipe 15, which is convenient for the subsequent descaling agent to quickly remove the scale, and the corrosion inhibitor and the descaling agent are alternately put in, which can repeatedly soften and remove the scale. The overall removal of the scale is realized, and the removal effect is improved. The pump body 5 and the second valve body 8 are closed, so that the cleaning water stays in the heat exchange pipe 15, soaks the scale, and is convenient for the subsequent complete flushing of the scale out of the heat exchange pipe 15; finally, the blowdown valve 61 is opened, so that the cleaning water is completely discharged into the sewage pipe 6 network for unified treatment.

[0101] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and replacements without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A method for cleaning a condenser using a condenser cleaning device, wherein the condenser body is connected to an inlet pipe and an outlet pipe, and both the inlet pipe and the outlet pipe are provided with a first valve body; a heat exchange tube is provided inside the condenser body, and the inlet pipe and the outlet pipe are connected through the heat exchange tube; a drain pipe is also provided on the condenser, and the drain pipe is connected to the heat exchange tube, characterized in that: The condenser cleaning device includes a cleaning water tank, a cleaning water pipe, and a return water pipe. The cleaning water pipe is connected to the cleaning water tank and is equipped with a pump body. The cleaning water pipe is also connected to the sewage pipe. One end of the return water pipe is connected to the outlet pipe, and the other end is connected to the cleaning water tank. The top of the cleaning water tank has an opening, and the bottom of the cleaning water tank is connected to a sewage pipe. The sewage pipe is equipped with a sewage valve, and both the cleaning water pipe and the return water pipe are equipped with a second valve body. The method includes the following steps: S1. Start the pump body; the cleaning fluid in the cleaning water tank passes through the cleaning water pipe, drain pipe, heat exchange pipe, outlet pipe, and return pipe in sequence, and finally returns to the cleaning water tank to form a cycle; S2. Add a first predetermined amount of corrosion inhibitor to the cleaning water tank; clean with the corrosion inhibitor for a first predetermined time; S3. Add the second predetermined amount of descaling agent to the cleaning water tank; clean with the descaling agent for the second predetermined time. S4. Add the third predetermined amount of corrosion inhibitor to the cleaning water tank; clean with the corrosion inhibitor for the third predetermined time. S5. Add the fourth predetermined amount of descaling agent to the cleaning water tank; clean with the descaling agent for the fourth predetermined time. S6. After shutting down the pump body and the second valve body for the fifth predetermined time, start the pump body and open the second valve body; S61. Add the sixth predetermined amount of descaling agent to the cleaning water tank; clean with the descaling agent for the sixth predetermined time; S7. Open the drain valve.

2. The method for cleaning a condenser using a condenser cleaning device according to claim 1, characterized in that, An overflow pipe is provided at the top of the cleaning water tank; one end of the overflow pipe is connected to the cleaning water tank, and the other end of the overflow pipe is connected to the sewage pipe.

3. The method for cleaning a condenser using a condenser cleaning device according to claim 1, characterized in that, After performing step S61, the following steps are also included: S62. Add the seventh predetermined amount of corrosion inhibitor to the cleaning water tank; clean with the corrosion inhibitor for the seventh predetermined time.

4. The method for cleaning a condenser using a condenser cleaning device according to claim 3, characterized in that, After step S62, the following steps are also included: S63. Add the eighth predetermined amount of descaling agent to the cleaning water tank; clean with the descaling agent for the eighth predetermined time.

5. The method for cleaning a condenser using a condenser cleaning device according to any one of claims 1, 3, and 4, characterized in that, The corrosion inhibitor is a hydrochloric acid pickling corrosion inhibitor, and the descaling agent is an acidic descaling agent.

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