Condenser full-area cleaning keeping system

Abstract

A condenser full-area cleaning keeping system comprises a compressed air tank, a circulating water tank, a rubber spherical tank, a low-pressure condenser water chamber and a high-pressure condenser water chamber, the low-pressure condenser water chamber and the high-pressure condenser water chamber are connected through a circulating water pipe, the low-pressure condenser water chamber is connected with a circulating water inlet pipe, and the high-pressure condenser water chamber is connected with a circulating water outlet pipe; in conclusion, compressed air is adopted as a power source for serving power, the serving power is high, auxiliary power consumption is not needed, the serving quantity is large, the serving speed is high, the rubber ball quantity is larger than that of condenser pipes of the condenser, the probability that the rubber balls clean heat exchange pipes in the whole area is improved, and the area of cleaning the condenser at a time is large; by the aid of the totally-closed conical filter screen and the internal speed-adjustable rotating scraper, unit operation conditions such as vacuum degree reduction and heat exchange efficiency reduction caused by scaling of the condenser are improved, benefits of a power plant are greatly improved, labor cost is saved, maintenance workload is reduced, and unattended operation is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam turbines, and in particular relates to a condenser full-area cleaning maintenance system. Background Art

[0002] The condenser equipment is an important part of the steam turbine unit. Its working performance directly affects the safety, reliability, stability and economy of the entire steam turbine unit. The cleanliness of the condenser directly affects the vacuum value of the unit. The vacuum level of the condenser has a direct impact on the economy of the steam turbine generator unit. If the vacuum decreases by 1%, the steam consumption of the steam turbine will increase by 1%-2% on average, and the coal consumption will increase by 0.1%-0.15%. Therefore, it is necessary to maintain the good operating conditions of the condenser to ensure the most favorable vacuum of the condenser.

[0003] In order to improve the heat exchange effect of the condenser, the condenser heat exchange tubes must be cleaned. The main cleaning methods include high-pressure water cleaning and chemical cleaning. Both cleaning methods basically require the unit to be shut down. The traditional rubber ball system has the following problems:

[0004] (1) Small amount of balls: Since the traditional rubber ball system relies on a rubber ball pump to transport the balls into the pipeline through a DN150 pipeline, the rubber balls are mainly concentrated in the center of the pipeline. After entering the condenser, they are concentrated in a specific position and cannot flush all the heat exchange tubes of the condenser.

[0005] (2) Slow ball delivery speed: The traditional rubber ball system uses a rubber ball pump as the power source, and the ball delivery speed depends on the speed of the rubber ball pump;

[0006] (3) Low ball collection rate: Due to design defects of traditional ball collection devices, they cannot be completely closed when frequently opened and closed, causing a large number of rubber balls to leak. The low ball collection rate does not meet the technical supervision requirements and requires frequent ball replenishment.

[0007] (4) Large maintenance workload: Due to the complex structure of the traditional rubber ball system, the workload during operation and maintenance is large and there are many defects. Utility Model Content

[0008] The utility model aims to provide a condenser full-area cleaning and maintenance system to solve the technical problems of small amount of rubber balls, slow speed and low ball collection rate during the cleaning of the existing traditional condenser heat exchange tubes.

[0009] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0010] The condenser full-area cleanliness maintenance system includes a compressed air tank, a circulating water tank, a rubber ball tank, a low-pressure condenser water chamber and a high-pressure condenser water chamber. The low-pressure condenser water chamber and the high-pressure condenser water chamber are connected through a circulating water pipe. The low-pressure condenser water chamber is connected to a circulating water inlet pipe, and the high-pressure condenser water chamber is connected to a circulating water outlet pipe;

[0011] The compressed air tank is connected to the top of the circulating water tank through a high-pressure pipeline, a pneumatic ball valve is arranged on the high-pressure pipeline, a piston is arranged in the circulating water tank, the outer edge of the piston is sealed with the inner wall of the circulating water tank, and the piston can float freely in the water, the circulating water tank is connected to the rubber ball tank through a water delivery pipe, the rubber ball tank is connected to the circulating water inlet pipe through a delivery pipeline, a first pneumatic butterfly valve is arranged on the delivery pipeline, a ball collecting device is arranged on the circulating water outlet pipe, the ball collecting device is connected to the circulating water tank through a recovery pipeline, and a second pneumatic butterfly valve, a counting device and a third pneumatic butterfly valve are arranged in sequence on the recovery pipeline;

[0012] The rubber ball tank is connected with the circulating water outlet pipe through a drainage pipe, and a fourth pneumatic butterfly valve and a drainage pump are arranged on the drainage pipe.

[0013] Furthermore, the ball collecting device includes a conical filter, which is fixed in the circulating water outlet pipe by an external bracket, and a mounting platform is fixed in the conical filter by an internal bracket, and a steering gear box is installed on the mounting platform, and the steering gear box is connected to a transmission shaft and a rotating shaft, and the rotating shaft is rotatably installed on the conical filter, and the axis of the rotating shaft coincides with the axis of the conical filter, and a plurality of scrapers are fixed on the rotating shaft by connecting rods, and the outer edges of the scrapers are in contact with the inner wall of the conical filter, and a variable frequency motor is installed on the outer wall of the circulating water outlet pipe, and the main shaft of the motor is connected to the transmission shaft through a coupling.

[0014] Furthermore, an emergency relief valve is provided on the side of the ball collecting device installed on the circulating water outlet pipe.

[0015] Furthermore, the counting device includes a controller and a sealed pipe, a plurality of passing tubes are evenly distributed in the sealed pipe, each passing tube is provided with a photoelectric sensor, and all the photoelectric sensors are connected to the controller.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model adopts compressed air as the power source for the ball launching, the ball launching pressure is high, no factory electricity consumption is required, the number of rubber balls is large, the speed is fast, and the number of rubber balls is greater than the number of condenser heat exchange tubes, thereby increasing the probability of the rubber balls cleaning the heat exchange tubes in the entire area, and the condenser area is large for a single cleaning; and a fully enclosed conical filter screen and an internal adjustable speed scraper are adopted, with a high ball collection rate, while the rubber balls enter the rubber ball tank tangentially, and flush the tank wall under the push of circulating water, thereby realizing self-cleaning of the rubber balls; in short, the utility model improves the unit operating conditions such as the decrease in vacuum degree and the decrease in heat exchange efficiency caused by condenser scaling, greatly improves the efficiency of the power plant, saves labor costs, reduces maintenance and realizes unmanned operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the whole area cleaning maintenance system of the condenser of the utility model;

[0019] Figure 2 It is a structural schematic diagram of a ball collecting device;

[0020] Figure 3 Schematic diagram of the structure of the counting device. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The present invention is further described in detail below in conjunction with the embodiments.

[0023] like Figure 1 As shown, a specific embodiment of a condenser full-area cleaning and maintenance system provided by the utility model is as follows:

[0024] The condenser full-area cleanliness maintenance system includes a compressed air tank 1, a circulating water tank 2, a rubber ball tank 3, a low-pressure condenser water chamber 4 and a high-pressure condenser water chamber 5. The low-pressure condenser water chamber 4 and the high-pressure condenser water chamber 5 are connected through a circulating water pipe. The low-pressure condenser water chamber 4 is connected to a circulating water inlet pipe 6, and the high-pressure condenser water chamber 5 is connected to a circulating water outlet pipe 7.

[0025] The compressed air tank 1 is connected to the top of the circulating water tank 2 through a high-pressure pipeline. A pneumatic ball valve 8 is provided on the high-pressure pipeline. A piston 9 is provided in the circulating water tank 2. The outer edge of the piston 9 is sealed with the inner wall of the circulating water tank 2, and the piston 9 can move up and down in the circulating water tank 2. The piston 9 is made of corrosion-resistant, self-lubricating and low-density material. The upper side of the piston 9 is compressed air, and the lower side is circulating water. It can float on the water surface in the circulating water tank 2, and the air and water are effectively isolated to prevent air from entering the circulating water and deteriorating the Heat transfer; the circulating water tank 2 is connected to the rubber ball tank 3 through a water delivery pipeline, and the rubber ball tank 3 is connected to the circulating water inlet pipe 6 through a delivery pipeline. The rubber balls in the rubber ball tank 3 are instantly pushed into the delivery pipeline by the pressure of the circulating water. A first pneumatic butterfly valve 10 is provided on the delivery pipeline, and a ball collecting device 11 is provided on the circulating water outlet pipe 7. The ball collecting device 11 is connected to the circulating water tank 2 through a recovery pipeline, and a second pneumatic butterfly valve 12, a counter 13 and a third pneumatic butterfly valve 14 are sequentially provided on the recovery pipeline;

[0026] The rubber ball tank 3 is connected to the circulating water outlet pipe 7 through a drainage pipe, and a fourth pneumatic butterfly valve 15 and a drainage pump 16 are provided on the drainage pipe.

[0027] The working process of the condenser full-area cleaning and maintenance system of this embodiment is as follows: compressed air is buffered and stored in the compressed air tank 1. When it is put into operation, the pneumatic ball valve 8 and the first pneumatic butterfly valve 10 are opened, and the compressed air enters the circulating water tank 2 through the high-pressure pipeline. The compressed air pushes the piston 9 to press the circulating water in the circulating water tank 2 into the rubber ball tank 3. The rubber balls in the rubber ball tank 3 are mixed with the circulating water and enter the circulating water inlet pipe 6, and then enter the low-pressure condenser water chamber 4 and the high-pressure condenser water chamber 5. Then the frequency conversion motor 22 and the second pneumatic butterfly valve 12, the third pneumatic butterfly valve 14 and the fourth pneumatic butterfly valve 15 are opened, and the drainage pump 16 is started. The rubber balls pass through the ball collecting device 11 and enter the counting device 13, and return tangentially to the rubber ball tank 3 to complete the cleaning process of the outer circle of the circulating water. In addition, the same structure can be set in the inner circle of the circulating water to complete the inner circle cleaning.

[0028] like Figure 2As shown, the ball collecting net device 11 of this embodiment includes a conical filter screen 17, which is made of corrosion-resistant material. The conical filter screen 17 is fixed in the circulating water outlet pipe 7 through an external bracket. A mounting platform is fixed in the conical filter screen 17 through an internal bracket. A steering gear box 18 is installed on the mounting platform. The steering gear box 18 is connected to a transmission shaft 19 and a rotating shaft 20. The rotating shaft 20 is rotatably mounted on the conical filter screen 17, and the axis of the rotating shaft 20 coincides with the axis of the conical filter screen 17. A plurality of scrapers 21 are fixed on the rotating shaft 20 through a connecting rod, and the outer edge of the scraper 21 is aligned with the inner edge of the conical filter screen 17. The outer wall of the circulating water outlet pipe 7 is installed with a variable frequency motor 22, and the main shaft of the variable frequency motor 22 is connected to the transmission shaft 19 through a coupling; the variable frequency motor 22 can drive the rotating shaft 20 to rotate through the transmission shaft 19 and the gear box 18, and finally the scraper 21 rotates on the inner wall of the conical filter 17, and the scraper 21 is in zero-distance contact with the conical filter 17, and impurities, fillers, marine organisms, etc. are washed away with the circulating water; in addition, emergency relief valves 23 are arranged on both sides of the conical filter 17. When the front and rear pressure difference seriously exceeds the standard and affects the safe operation of the unit, the emergency relief valve 23 can be opened urgently to ensure the safe operation of the equipment.

[0029] like Figure 3 As shown, the counting device 13 includes a controller and a sealed pipe 24, 20 passing tubes 25 are evenly distributed in the sealed pipe 24, each passing tube 25 is provided with a photoelectric sensor 26, and all the photoelectric sensors 26 are connected to the controller; when the rubber ball enters the passing tube 25, the photoelectric sensor automatically records it, and transmits the accumulated rubber balls to the controller through the data collector, thereby controlling the number of revolutions of the scraper 21 and calculating the ball collection rate of the system.

[0030] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0031] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Condenser full area clean maintenance system, characterized by: It includes a compressed air tank, a circulating water tank, a rubber ball tank, a low-pressure condenser water chamber and a high-pressure condenser water chamber. The low-pressure condenser water chamber and the high-pressure condenser water chamber are connected through a circulating water pipe. The low-pressure condenser water chamber is connected with a circulating water inlet pipe, and the high-pressure condenser water chamber is connected with a circulating water outlet pipe and a ball collecting device with an emergency discharge valve. The compressed air tank is connected to the top of the circulating water tank through a high-pressure pipeline, a pneumatic ball valve is arranged on the high-pressure pipeline, a piston is arranged in the circulating water tank, the outer edge of the piston is sealed with the inner wall of the circulating water tank, and the piston can float freely in the water, the circulating water tank is connected to the rubber ball tank through a water delivery pipe, the rubber ball tank is connected to the circulating water inlet pipe through a delivery pipeline, a first pneumatic butterfly valve is arranged on the delivery pipeline, a ball collecting device is arranged on the circulating water outlet pipe, the ball collecting device is connected to the circulating water tank through a recovery pipeline, and a second pneumatic butterfly valve, a counting device and a third pneumatic butterfly valve are arranged in sequence on the recovery pipeline; The rubber ball tank is connected with the circulating water outlet pipe through a drainage pipe, and a fourth pneumatic butterfly valve and a drainage pump are arranged on the drainage pipe.

2. The condenser full-area cleaning and maintenance system according to claim 1, characterized in that: The ball collecting device includes a conical filter screen, which is fixed in a circulating water outlet pipe through an external bracket, a mounting platform is fixed in the conical filter screen through an internal bracket, a steering gear box is mounted on the mounting platform, the steering gear box is connected with a transmission shaft and a rotating shaft, the rotating shaft is rotatably mounted on the conical filter screen, and the axis of the rotating shaft coincides with the axis of the conical filter screen, a plurality of scrapers are fixed on the rotating shaft through a connecting rod, the outer edge of the scraper contacts the inner wall of the conical filter screen, a variable frequency motor is mounted on the outer wall of the circulating water outlet pipe, and the main shaft of the motor is connected to the transmission shaft through a coupling.

3. The condenser full-area cleaning and maintenance system according to claim 2, characterized in that: An emergency relief valve is provided on the side of the ball collecting device installed on the circulating water outlet pipe.

4. The condenser full-area cleaning and maintenance system according to claim 3, characterized in that: The counting device comprises a controller and a sealed pipe. A plurality of passing tubes are evenly distributed in the sealed pipe. A photoelectric sensor is arranged on each passing tube. All the photoelectric sensors are connected to the controller.

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