A condenser rubber ball cleaning device

Abstract

The present invention relates to a condenser rubber ball cleaning device, comprising a condenser A side ball collecting mesh plate and a condenser B side ball collecting mesh plate connected to a ball collector, the two ends of each unit ball collecting mesh plate respectively pass through the respective inlet gates of each condenser ball cleaning pump and respectively merge, and then respectively connect to the input end of the first condenser ball cleaning pump and the second condenser ball cleaning pump, the output end of the first condenser ball cleaning pump and the second condenser ball cleaning pump respectively connect to the outlet gate of each condenser ball cleaning pump, each condenser ball cleaning pump outlet gate is connected to a manifold, the manifold is also connected to a ball loading chamber and an electrical control cabinet, and the input end of the first condenser ball cleaning pump and the second condenser ball cleaning pump are also separately connected through a connecting pipe. Compared with the prior art, the present invention has the advantages of significantly increasing the flow rate of circulating water in the cleaning device, improving the ball collection rate, and ensuring the cleaning of the pipe wall.

Description

Technical Field

[0001] The invention relates to the technical field of condenser rubber ball cleaning, in particular to a condenser rubber ball cleaning device. Background Art

[0002] Generally, power plants use Units 1 and 2 to generate electricity. Both Units 1 and 2 are 600MW supercritical pressure, single-intermediate reheat, single-shaft, four-cylinder, four-exhaust, reaction condensing steam turbine units. Each unit needs to be cleaned with a condenser rubber ball once a month to ensure the cleanliness of the condenser titanium tubes and the heat exchange efficiency of the cold end.

[0003] In the prior art, due to the circulating pump arrangement in the pump room and a slight decrease in output after a circulating pump was converted to a variable frequency, the circulating water flow rate and velocity of Unit 2 are lower than those of Unit 1. When cleaning the condenser rubber balls, the small flow rate often leads to the inability to normally recover the rubber balls to the ball collector. Most of the rubber balls cannot even complete a single cycle of cleaning. The condenser titanium tubes are prone to scaling, the heat exchange efficiency is reduced, the condenser end difference is increased, and the circulating water temperature rise is reduced, thereby reducing the unit's operating economy. Each side of the condenser rubber balls throw 1,000 balls each time, and a large number of rubber balls escape, resulting in a huge loss. Summary of the invention

[0004] The purpose of the present invention is to provide a condenser rubber ball cleaning device in order to overcome the defects of the above-mentioned prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A condenser rubber ball cleaning device comprises a condenser A side ball receiving mesh plate and a condenser B side ball receiving mesh plate which correspond to power plant units and are connected to a ball collector, wherein the two ends of the condenser A side ball receiving mesh plate and the condenser B side ball receiving mesh plate respectively pass through a first inlet gate of a first condenser ball cleaning pump, a second inlet gate of a first condenser ball cleaning pump, a first inlet gate of a second condenser ball cleaning pump and a second inlet gate of a second condenser ball cleaning pump, and then respectively meet and correspond to the first condenser ball cleaning pump and the second condenser ball cleaning pump. The input end of the ball cleaning pump is connected, and the output ends of the first condenser ball cleaning pump and the second condenser ball cleaning pump are respectively connected to the first condenser ball cleaning pump outlet door and the second condenser ball cleaning pump outlet door, the first condenser ball cleaning pump outlet door and the second condenser ball cleaning pump outlet door are both connected to the manifold, and the manifold is also connected to the ball loading room and the electrical control cabinet, and the input ends of the first condenser ball cleaning pump and the second condenser ball cleaning pump are also separately connected through a connecting pipe.

[0007] Furthermore, the first inlet door of the first condenser ball cleaning pump adopts a lifting check valve.

[0008] Furthermore, the second inlet gate of the first condenser ball cleaning pump adopts a lifting check valve.

[0009] Furthermore, the first inlet gate of the second condenser ball cleaning pump adopts a lifting check valve.

[0010] Furthermore, the second inlet door of the second condenser ball cleaning pump adopts a lifting check valve.

[0011] Furthermore, the ball loading chamber is composed of an outer shell, a funnel, an electric switching valve, and is equipped with an observation window, an exhaust valve and a drain valve.

[0012] Furthermore, the distributor is a three-way valve.

[0013] Furthermore, the first condenser ball cleaning pump is a barrier-free pump.

[0014] Furthermore, the second condenser ball cleaning pump adopts a barrier-free pump.

[0015] Furthermore, the diameter of the connecting pipe is 15cm-20cm.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] (1) The condenser rubber ball cleaning device of the present invention comprises a condenser A side ball receiving mesh plate and a condenser B side ball receiving mesh plate corresponding to the power plant units respectively. The two ends of the condenser A side ball receiving mesh plate and the condenser B side ball receiving mesh plate respectively pass through the first inlet gate of the first condenser ball cleaning pump, the second inlet gate of the first condenser ball cleaning pump, the first inlet gate of the second condenser ball cleaning pump and the second inlet gate of the second condenser ball cleaning pump respectively and then respectively merge, and then respectively connect with the input ends of the first condenser ball cleaning pump and the second condenser ball cleaning pump respectively, and the output ends of the first condenser ball cleaning pump and the second condenser ball cleaning pump respectively correspond to the output ends of the first condenser ball cleaning pump The inlet door is connected to the outlet door of the second condenser ball cleaning pump, the outlet door of the first condenser ball cleaning pump and the outlet door of the second condenser ball cleaning pump are both connected to the manifold, the manifold is also connected to the ball loading room and the electrical control cabinet, the input ends of the first condenser ball cleaning pump and the second condenser ball cleaning pump are also separately connected through a connecting pipe. The device of the present invention does not adopt the conventional method of replacing a larger capacity pump to solve the problem, but increases the circulating water flow and flow rate in the cleaning device by running two condenser ball cleaning pumps in parallel, achieving the effect while saving investment, and opening up solutions to the problem of low ball collection rate that may exist in the same type of condensing steam turbine units.

[0018] (2) After the actual unit transformation was carried out using the device of the present invention, the ball cleaning result of Unit 2 was significantly improved. By optimizing the cleaning method and the screen optimization measures, within the specified cleaning time (1 hour), the ball collection rate on the A side of Unit 1 was increased from about 40% to more than 80%, and the ball collection rate on the B side of Unit 2 was increased from about 30% to more than 60%, basically achieving the purpose of increasing the circulating water flow rate to improve the ball collection rate.

[0019] (3) After the device of the present invention was used to transform the actual unit, the cleaning efficiency of the rubber balls was improved, the heat exchange efficiency of the condenser was improved, the end difference was reduced, and the safe and economical operation of the condenser was ensured. During the operation of the unit, 1,000 rubber balls were put into each side every month. According to the above data, about 700 more rubber balls can be recovered every month (4 yuan per ball), which can save about 33,600 yuan in costs each year. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a condenser rubber ball cleaning device of the present invention;

[0021] In the figure, 1 is the ball receiving mesh plate on the side of condenser A, 2 is the ball receiving mesh plate on the side of condenser B, 3 is the first inlet door of the first condenser ball cleaning pump, 4 is the second inlet door of the first condenser ball cleaning pump, 5 is the first inlet door of the second condenser ball cleaning pump, 6 is the second inlet door of the second condenser ball cleaning pump, 7 is the first condenser ball cleaning pump, 8 is the second condenser ball cleaning pump, 9 is the outlet door of the first condenser ball cleaning pump, 10 is the outlet door of the second condenser ball cleaning pump, 11 is the distributor, and 12 is the connecting pipeline. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention. Specific embodiments

[0024] (1) Device structure and connection relationship:

[0025] like Figure 1The condenser rubber ball cleaning device shown is mainly composed of 2 ball collecting mesh plates, 2 condenser small ball cleaning pumps, 1 ball collector and 1 control cabinet. The ball collecting mesh plates A and B are respectively placed in the circulating water outlet pipes of condensers A and B. The ball collecting mesh plates are opened when not cleaning, and closed during cleaning to allow the rubber balls to circulate and clean in the condenser circulating water pipes. The condenser small ball cleaning pump promotes the circulation of small balls and collects the balls. After the small balls are recovered by the ball collecting mesh plates, they are pumped out by the cleaning pump to the condenser circulating water inlet pipe. After the condenser rubber ball cleaning is completed, the ball collecting mesh plates in the ball collector are closed to collect the balls.

[0026] (2) Improvements

[0027] According to the layout of the existing power plant units, the technical solution of the present invention is adopted to carry out actual transformation, and the operation requirements and steps of the condenser rubber ball cleaning are adjusted.

[0028] (3) Working principle:

[0029] In order to improve the ball collection rate of condenser rubber ball cleaning, the condenser rubber ball cleaning device is as follows: Figure 1 As shown, a connecting pipe is added at the inlet of the two condenser ball cleaning pumps, so that the two ball cleaning pumps can run in parallel. When cleaning the titanium tube on the A side of the condenser, close the first inlet door of the second condenser ball cleaning pump and the second inlet door 5, 6 of the second condenser ball cleaning pump, open the first inlet door of the first condenser ball cleaning pump and the second inlet door 3, 4 of the first condenser ball cleaning pump, and start the first condenser ball cleaning pump and the second condenser ball cleaning pump 7, 8 at the same time, changing the previous situation of only starting one pump, significantly increasing the flow rate of circulating water in the cleaning device, improving the ball collection rate, ensuring the cleanliness of the tube wall, and avoiding the impact on the economic operation of the unit.

[0030] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A condenser rubber ball cleaning device, characterized in that: The invention comprises a condenser A side ball receiving mesh plate (1) and a condenser B side ball receiving mesh plate (2) which correspond to the power plant units and are connected to the ball collector, wherein the two ends of the condenser A side ball receiving mesh plate (1) and the condenser B side ball receiving mesh plate (2) respectively pass through the first inlet gate (3) of the first condenser ball cleaning pump, the second inlet gate (4) of the first condenser ball cleaning pump, the first inlet gate (5) of the second condenser ball cleaning pump and the second inlet gate (6) of the second condenser ball cleaning pump, and then respectively meet and are connected to the input ends of the first condenser ball cleaning pump (7) and the second condenser ball cleaning pump (8) respectively. The output ends of the first condenser ball cleaning pump (7) and the second condenser ball cleaning pump (8) are respectively connected to the first condenser ball cleaning pump outlet door (9) and the second condenser ball cleaning pump outlet door (10), the first condenser ball cleaning pump outlet door (9) and the second condenser ball cleaning pump outlet door (10) are both connected to a manifold (11), and the manifold (11) is also connected to the ball loading room and the electrical control cabinet. The input ends of the first condenser ball cleaning pump (7) and the second condenser ball cleaning pump (8) are also separately connected via a connecting pipe (12). The first inlet gate (3) of the first condenser ball cleaning pump adopts a lifting check valve. The first inlet door (5) of the second condenser ball cleaning pump is a lifting check valve.

2. A condenser rubber ball cleaning device according to claim 1, characterized in that: The second inlet gate (4) of the first condenser ball cleaning pump adopts a lifting check valve.

3. The condenser rubber ball cleaning device according to claim 1, characterized in that: The second inlet door (6) of the second condenser ball cleaning pump is a lifting check valve.

4. The condenser rubber ball cleaning device according to claim 1, characterized in that: The ball loading chamber is composed of an outer shell, a funnel, an electric switching valve, and is provided with an observation window, an exhaust valve and a drain valve.

5. The condenser rubber ball cleaning device according to claim 1, characterized in that: The distributor (11) is a three-way valve.

6. The condenser rubber ball cleaning device according to claim 1, characterized in that: The first condenser ball cleaning pump (7) is a barrier-free pump.

7. The condenser rubber ball cleaning device according to claim 1, characterized in that: The second condenser ball cleaning pump (8) is a barrier-free pump.

8. The condenser rubber ball cleaning device according to claim 1, characterized in that: The diameter of the connecting pipe (12) is 15 cm-20 cm.

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