Cooling water recovery device for mechanical seal of condensate pump

Abstract

The invention relates to a condensate pump mechanical seal cooling water recovery device which comprises a water tank, a water pump and a water seal assembly, the water tank is provided with a drainage pipe and a water outlet pipe, the drainage pipe is used for being communicated with a cavity of a condensate pump, the water outlet pipe is located at one end of the water tank in the preset direction, and the water pump is arranged on the water outlet pipe. The water seal assembly is provided with a water inlet and a water outlet, and the water inlet is communicated with the water outlet pipe. According to the condensate pump mechanical seal cooling water recycling device, recycling of cooling water overflowing from the condensate pump is achieved, waste of water resources is avoided, the investment cost of a power plant on demineralized water can be reduced, the problems of pump pit water accumulation, equipment corrosion and the like are reduced, meanwhile, the water seal assembly has the good vacuum maintaining and sealing effects, and the service life of the water seal assembly is prolonged. Air can be prevented from permeating into a cooling water flowing path from the drainage pipe to the water seal device, and the vacuum degree of the condensate pump in an unused state is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of cooling water recovery, and in particular to a condensate pump mechanical seal cooling water recovery device. Background Art

[0002] The condensate pump is mainly used to transport the condensate in the condenser to the deaerator for further heating and deoxygenation. Due to the design of the condensate pump and the vacuum tightness requirements, the mechanical seal cooling water of the condensate pump has a certain amount of overflow after cooling in the cavity to ensure the vacuum tightness. The overflow cooling water is directly discharged to the condensate pump pit and then slowly flows to the negative meter sewage pump pit, causing the condensate pump pit to be wet all year round, the equipment casing is seriously corroded, and water resources are wasted. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes a condensate pump mechanical seal cooling water recovery device, which has a simple structure and is easy to install. It can not only recover the overflow cooling water of the condensate pump, reduce the waste of water resources, reduce water accumulation in the pump pit and equipment corrosion problems, but also ensure the vacuum degree of the condensate pump.

[0005] According to an embodiment of the present invention, a condensate pump mechanical seal cooling water recovery device includes a water tank, a water pump and a water seal assembly. The water tank is provided with a drainage pipe and a water outlet pipe. The drainage pipe is used to connect to the cavity of the condensate pump. The water outlet pipe is located at one end of the water tank in a preset direction. The water pump is arranged on the water outlet pipe. The water seal assembly has a water inlet and a water outlet. The water inlet is connected to the water outlet pipe.

[0006] The condensate pump mechanical seal cooling water recovery device of the embodiment of the present invention realizes the recovery of cooling water overflowed from the condensate pump, avoids the waste of water resources, and can also reduce the investment cost of desalted water in power plants, reduce the occurrence of problems such as water accumulation in the pump pit and equipment corrosion. At the same time, the water seal assembly has good vacuum preservation and sealing effects, which can prevent air from infiltrating into the cooling water flow path from the drainage pipe to the water seal device, thereby ensuring the vacuum degree of the condensate pump when it is not in use.

[0007] In some embodiments, an overflow pipe is provided at the other end of the water tank in the preset direction.

[0008] In some embodiments, the condensate pump mechanical seal cooling water recovery device further includes a drain valve, and the water tank is provided with a drain pipe at the one end in the preset direction, and the drain valve is provided on the drain pipe.

[0009] In some embodiments, the condensate pump mechanical seal cooling water recovery device further includes a liquid level gauge switch, which is arranged on the water tank, and the liquid level gauge switch is used to monitor the liquid level in the water tank. The liquid level gauge switch is electrically connected to the water pump to control the start and stop of the water pump.

[0010] In some embodiments, the condensate pump mechanical seal cooling water recovery device further includes a conductivity meter, which is arranged on the water tank, and the detection end of the conductivity meter extends into the water tank to detect the conductivity of the water in the water tank.

[0011] In some embodiments, the condensate pump mechanical seal cooling water recovery device further includes a pH meter, which is arranged on the water tank, and the detection end of the pH meter extends into the water tank to detect the pH value of the water in the water tank.

[0012] In some embodiments, the water tank is provided with a manhole at the other end in the preset direction, and the water tank is provided with a manhole door at the manhole.

[0013] In some embodiments, the water seal assembly includes a connecting pipe, a first-end water seal fitting and an end water seal fitting, the inlet of the first-end water seal fitting forms the water inlet of the water seal assembly, the first-end water seal fitting is connected with the end water seal fitting through the connecting pipe, and the outlet of the end water seal fitting forms the water outlet of the water seal assembly.

[0014] In some embodiments, the connecting pipe includes a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are separated, the water seal assembly includes a first intermediate water seal pipe fitting and a second intermediate water seal pipe fitting, the outlet of the head end water seal pipe fitting is connected to the inlet of the first intermediate water seal pipe fitting through the first connecting portion, the outlet of the first intermediate water seal pipe fitting is connected to the inlet of the second intermediate water seal pipe fitting, and the second intermediate water seal pipe fitting is connected to the end water seal pipe fitting through the second connecting portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a condensate pump mechanical seal cooling water recovery device according to an embodiment of the present invention.

[0016] Reference numerals:

[0017] Condensate pump mechanical seal cooling water recovery device 100;

[0018] Water tank 1, drainage pipe 11, water outlet pipe 12, overflow pipe 13, drain pipe 14, manhole door 15;

[0019] Water pump 2, water seal assembly 3, connecting pipe 31, first connecting part 311, second connecting part 312, head end water seal pipe fitting 32, end water seal pipe fitting 33, first intermediate water seal pipe fitting 34, second intermediate water seal pipe fitting 35, drain valve 4, liquid level meter switch 5, conductivity meter 6, pH meter 7. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0021] Please refer to the attached Figure 1 , a condensate pump mechanical seal cooling water recovery device 100 according to an embodiment of the present invention is described in detail.

[0022] The condensate pump mechanical seal cooling water recovery device 100 of the embodiment of the present invention includes a water tank 1, a water pump 2 and a water seal assembly 3. The water tank 1 is provided with a drainage pipe 11 and a water outlet pipe 12. The drainage pipe 11 is used to connect to the cavity of the condensate pump. The water outlet pipe 12 is located at one end of the water tank 1 in a preset direction. The water pump 2 is arranged on the water outlet pipe 12. The water seal assembly 3 has a water inlet and a water outlet. The water inlet is connected to the water outlet pipe 12, and the water outlet is used to connect to the deaerator.

[0023] When the condensate pump mechanical seal cooling water recovery device 100 of the embodiment of the present invention is in use, the preset direction is the up and down direction, and the outlet pipe 12 is located at the lower end of the water tank 1. The drainage pipe 11 is connected to the cavity of the condensate pump. When the cooling water overflows from the cavity of the condensate pump, the cooling water flows from the drainage pipe 11 to the water tank 1. When the water in the water tank 1 reaches a certain height, the water pump 2 is turned on to transport the water in the water tank 1 to the water seal assembly 3 through the outlet pipe 12 and the water inlet. As the cooling water is continuously pumped into the water seal assembly 3, after the water in the water seal assembly 3 is full, the cooling water flows from the outlet of the water seal assembly 3 to the deaerator, and returns to the deionized water circulation network of the power plant through the deaerator.

[0024] The condensate pump mechanical seal cooling water recovery device 100 of the embodiment of the present invention realizes the recovery of cooling water overflowed from the condensate pump, avoids the waste of water resources, and can also reduce the investment cost of desalted water in power plants, reduce the occurrence of problems such as water accumulation in the pump pit and equipment corrosion, and eliminate the on-site safety hazards of the condensate pump. At the same time, the water seal assembly 3 has good vacuum preservation and sealing effects, which can prevent air from infiltrating into the cooling water flow path from the drainage pipe 11 to the water seal device, thereby ensuring the vacuum degree of the condensate pump when it is not in use.

[0025] Specifically, the water tank 1 of the condensate pump mechanical seal cooling water recovery device 100 of the embodiment of the present invention is made of stainless steel, which has good corrosion resistance, is easy to weld and will not pollute the water in the tank. The height of the water tank 1 is 150 cm.

[0026] The cooling water recovery device 100 for the mechanical seal of the condensate pump according to the embodiment of the present invention further includes a drain valve 4. A drain pipe 14 is provided at the end of the water tank 1 in the preset direction, and a drain valve 4 is provided on the drain pipe 14. That is, a drain pipe 14 is provided at the lower end of the water tank 1. The drain valve 4 is in a normally closed state. When the water tank 1 needs to be drained quickly, or when the water tank 1 needs to be drained quickly after cleaning, the drain valve 4 is opened to quickly drain the water in the water tank 1.

[0027] The other end of the water tank 1 in the preset direction is provided with an overflow pipe 13. Figure 1 As shown, an overflow pipe 13 is provided at the upper end of the water tank 1. When the water level in the water tank 1 exceeds the set height, the overflow pipe 13 will guide the excess water out of the water tank 1 to prevent the cooling water from flowing back, and ensure the normal overflow of the condensate pump when it is used, thereby improving the safety and reliability of the condensate pump mechanical seal cooling water recovery device 100 of the embodiment of the present invention.

[0028] Specifically, the overflow pipe 13 is located at a height of 150 cm of the water tank 1 .

[0029] The cooling water recovery device 100 of the mechanical seal of the condensate pump of the embodiment of the present invention further includes a liquid level gauge switch 5, which is arranged on the water tank 1, and is used to monitor the liquid level in the water tank 1. The liquid level gauge switch 5 is electrically connected to the water pump 2 to control the start and stop of the water pump 2. When the liquid level gauge switch 5 detects that the water level in the water tank 1 is higher than the high water level setting value, the liquid level gauge switch 5 outputs a signal to the water pump 2 to control the water pump 2 to start, and the water pump 2 is turned on to transport water to the water seal assembly 3. When the liquid level gauge switch 5 detects that the water level in the water tank 1 is lower than the low water level setting value, the liquid level gauge switch 5 outputs a signal to the water pump 2 to control the water pump 2 to stop, and the water pump 2 stops discharging.

[0030] In this embodiment, the high water level setting value is 80 cm high, and the low water level setting value is 20 cm high.

[0031] The condensate pump mechanical seal cooling water recovery device 100 of the embodiment of the present invention automatically detects the water level in the water tank 1 through the liquid level gauge switch 5, and controls the water pump 2 to be turned on or off when corresponding to the corresponding water level setting value, thereby realizing intelligent control of the water pump 2, thereby realizing the intelligent and continuous recovery of cooling water of the condensate pump mechanical seal cooling water recovery device 100 of the embodiment of the present invention, improving the degree of automation and reducing the workload of personnel.

[0032] The condensate pump mechanical seal cooling water recovery device 100 of the embodiment of the present invention further includes a conductivity meter 6, which is arranged on the water tank 1. The detection end of the conductivity meter 6 extends into the water tank 1 to detect the conductivity of the water in the water tank 1, so as to determine whether the conductivity of the water in the water tank is qualified.

[0033] The condensate pump mechanical seal cooling water recovery device 100 of the embodiment of the present invention further includes a pH meter 7, which is arranged on the water tank 1. The detection end of the pH meter 7 extends into the water tank 1 to detect the pH value (acidity) of the water in the water tank 1, so as to determine whether the pH of the water in the water tank is qualified.

[0034] In some embodiments, a manhole is provided at the other end of the water tank 1 in a preset direction, and a manhole door 15 is provided at the manhole of the water tank 1. The manhole door 15 is in a normally closed state. When it is necessary to inspect the inside of the water tank 1, the manhole door 15 can be opened, and the maintenance personnel enter the inside of the water tank 1 through the manhole door 15. The manhole door 15 improves the convenience of inspection of the water tank 1.

[0035] In some embodiments, the water seal assembly 3 includes a connecting pipe 31, a head water seal fitting 32 and an end water seal fitting 33, the inlet of the head water seal fitting 32 forms the water inlet of the water seal assembly 3, the head water seal fitting 32 is connected to the end water seal fitting 33 through the connecting pipe 31, and the outlet of the end water seal fitting 33 forms the water outlet of the water seal assembly 3.

[0036] The connecting pipe 31 includes a first connecting portion 311 and a second connecting portion 312, and the first connecting portion 311 and the second connecting portion 312 are separated. The water seal assembly 3 includes a first intermediate water seal pipe fitting 34 and a second intermediate water seal pipe fitting 35. The outlet of the head end water seal pipe fitting 32 is connected to the inlet of the first intermediate water seal pipe fitting 34 through the first connecting portion 311, the outlet of the first intermediate water seal pipe fitting 34 is connected to the inlet of the second intermediate water seal pipe fitting 35, and the second intermediate water seal pipe fitting 35 is connected to the end water seal pipe fitting 33 through the second connecting portion 312.

[0037] When water enters through the water inlet (that is, the inlet of the first end water seal pipe 32), the water flow path is: the first end water seal pipe 32 → the first connecting part 311 → the first middle water seal pipe 34 → the second middle water seal pipe 35 → the second connecting part 312 and the end water seal pipe 33.

[0038] In other words, the water seal assembly 3 of the embodiment of the present invention is a four-stage water seal. With the four-stage water seal, while achieving the same water seal effect and water storage capacity, it occupies less space in the upper and lower directions and is more convenient to install.

[0039] Therefore, the condensate pump mechanical seal cooling water recovery device of the embodiment of the present invention realizes the intelligent and continuous recovery of cooling water, avoids the waste of water resources, eliminates the potential safety hazards on site, ensures the vacuum degree of the condensate pump when not in use, is simple and reliable to install, has low cost and high efficiency, is particularly suitable for power plants, and realizes cost reduction and efficiency improvement for enterprises.

[0040] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0045] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A condensate pump mechanical seal cooling water recovery device (100), characterized in that: The invention comprises a water tank (1), a water pump (2) and a water seal assembly (3); the water tank (1) is provided with a drainage pipe (11) and a water outlet pipe (12); the drainage pipe (11) is used to communicate with the cavity of a condensate pump; the water outlet pipe (12) is located at one end of the water tank (1) in a preset direction; the water pump (2) is arranged on the water outlet pipe (12); and the water seal assembly (3) has a water inlet and a water outlet; the water inlet is connected to the water outlet pipe (12).

2. The condensate pump mechanical seal cooling water recovery device (100) according to claim 1, characterized in that: An overflow pipe (13) is provided at the other end of the water tank (1) in the preset direction.

3. The condensate pump mechanical seal cooling water recovery device (100) according to claim 1, characterized in that: It further comprises a drain valve (4); a drain pipe (14) is provided at the one end of the water tank (1) in the preset direction; and the drain valve (4) is provided on the drain pipe (14).

4. The condensate pump mechanical seal cooling water recovery device (100) according to claim 1, characterized in that: It further comprises a liquid level meter switch (5), which is arranged on the water tank (1) and is used to monitor the liquid level in the water tank (1). The liquid level meter switch (5) is electrically connected to the water pump (2) to control the start and stop of the water pump (2).

5. The condensate pump mechanical seal cooling water recovery device (100) according to claim 1, characterized in that: It further comprises a conductivity meter (6), wherein the conductivity meter (6) is arranged on the water tank (1), and the detection end of the conductivity meter (6) extends into the water tank (1) to detect the conductivity of the water in the water tank (1).

6. The condensate pump mechanical seal cooling water recovery device (100) according to claim 1, characterized in that: It further comprises a pH meter (7), wherein the pH meter (7) is arranged on the water tank (1), and a detection end of the pH meter (7) extends into the water tank (1) to detect the pH value of the water in the water tank (1).

7. The condensate pump mechanical seal cooling water recovery device (100) according to claim 1, characterized in that: The water tank (1) is provided with a manhole at the other end in the preset direction, and the water tank (1) is provided with a manhole door (15) at the manhole.

8. The condensate pump mechanical seal cooling water recovery device (100) according to claim 1, characterized in that: The water seal assembly (3) comprises a connecting pipe (31), a first-end water seal pipe fitting (32) and a terminal water seal pipe fitting (33); the inlet of the first-end water seal pipe fitting (32) forms a water inlet of the water seal assembly (3); the first-end water seal pipe fitting (32) is connected to the terminal water seal pipe fitting (33) through the connecting pipe (31); and the outlet of the terminal water seal pipe fitting (33) forms a water outlet of the water seal assembly (3).

9. The condensate pump mechanical seal cooling water recovery device (100) according to claim 8, characterized in that: The connecting pipe (31) comprises a first connecting portion (311) and a second connecting portion (312), wherein the first connecting portion (311) and the second connecting portion (312) are spaced apart from each other. The water seal assembly (3) further comprises a first intermediate water seal pipe member (34) and a second intermediate water seal pipe member (35), wherein the outlet of the head end water seal pipe member (32) is connected to the inlet of the first intermediate water seal pipe member (34) via the first connecting portion (311), the outlet of the first intermediate water seal pipe member (34) is connected to the inlet of the second intermediate water seal pipe member (35), and the second intermediate water seal pipe member (35) is connected to the end water seal pipe member (33) via the second connecting portion (312).

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