A water replenishment system for a vacuum pump of a thermal power unit and a method of using the same

Abstract

The present invention relates to the technical field of vacuum pump water replenishment, and in particular to a vacuum pump water replenishment system for a thermal power unit and a method for using the system, which comprises a control unit, wherein the control unit comprises a vacuum pump, a cooler connected to the vacuum pump, a steam-water separator, a condenser and a water delivery branch; water from the vacuum pump goes to the steam-water separator, and water from the steam-water separator goes to the cooler for cooling and then returns to the vacuum pump to form a cycle; wherein the vacuum pump comprises an inlet pipe, and the outer wall of the inlet pipe is connected to a water diversion pipeline, and atomizing water replenishment is performed at the inlet pipe of the vacuum pump to promote condensation of water vapor and reduce the inlet gas volume of the vacuum pump.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum pump water replenishment, and in particular to a vacuum pump water replenishment system for a thermal power unit and a use method thereof. Background Art

[0002] The vacuum pump is an important auxiliary machine of the thermal vacuum system of a thermal power plant. The function of the vacuum pump is to draw vacuum at the beginning and maintain the vacuum of the unit during normal operation. Thermal power units generally use water ring vacuum pumps. When the vacuum pump is running, it is necessary to maintain a certain water level in the steam-water separator. If the vacuum pump lacks water, the vacuum pump rotor may get stuck, causing the vacuum pump to trip, affecting the safe operation of the unit.

[0003] When the water level in the vacuum pump's water separator is low, water needs to be replenished. The water replenished by the vacuum pump generally goes directly into the water separator. This replenishment method can only simply replenish water and cannot improve the output capacity of the vacuum pump.

[0004] Based on this, we proposed a vacuum pump water replenishment system for thermal power units and its use method. Summary of the invention

[0005] In view of the above problems, a water replenishment system for a vacuum pump of a thermal power unit is proposed in the present invention.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a water replenishment system for a vacuum pump of a thermal power unit, comprising a control unit, wherein the control unit comprises a vacuum pump, a cooler connected to the vacuum pump, a steam-water separator, a condenser and a water supply branch; water from the vacuum pump goes to the steam-water separator, and water from the steam-water separator goes to the cooler for cooling and then returns to the vacuum pump to form a cycle; wherein the vacuum pump comprises an inlet pipe, and the outer wall of the inlet pipe is connected to a water supply pipe.

[0007] As a preferred solution of the vacuum pump water replenishment system of the thermal power unit described in the present invention, the water supply branch includes a condensate main pipe connected to the inlet pipe; a water replenishment solenoid valve is provided on the condensate main pipe, and a water replenishment bypass manual door is provided on one side of the water replenishment solenoid valve.

[0008] As a preferred solution of the water replenishment system for the vacuum pump of the thermal power unit of the present invention, one end of the water diversion pipeline is passed through the inlet pipe, and a plurality of nozzles are arranged on the water diversion pipeline in the inlet pipe.

[0009] As a preferred solution of the water replenishment system for the vacuum pump of the thermal power unit described in the present invention, a manual water inlet door and a manual water return door are provided on the vacuum pump cooler.

[0010] As a preferred solution of the vacuum pump water replenishment system of the thermal power unit described in the present invention, the steam-water separator is provided with an upper manual door of the water level gauge and a lower manual door of the water level gauge to monitor and control the water level of the steam-water separator; the steam-water separator is also provided with a manual water discharge door.

[0011] As a preferred solution of the water replenishment system for the vacuum pump of the thermal power unit described in the present invention, an inlet pneumatic door and an inlet electric door are arranged between the condenser and the vacuum pump.

[0012] In view of the above problems, the use method of the present invention is proposed.

[0013] To solve the above technical problems, the present invention provides the following technical solutions: a method of use, which includes a boiler fly ash sampling system; and starting the vacuum pump water supply system of the thermal power unit to ensure that the condensate main pipe is connected and filled with pressurized water; opening the water supply solenoid valve to allow pressurized water to flow into the system through the solenoid valve. The opening degree of the water supply solenoid valve can be adjusted by the control system to control the amount of water supply.

[0014] As a preferred embodiment of the method of use described in the present invention, the installation position of the nozzle is checked to ensure that the nozzle atomizes the water and allows it to enter the interior of the vacuum pump; before starting the vacuum pump, atomizing water is replenished through the nozzle to ensure that the separator reaches a normal water level, and the vacuum pump rotor body is flushed during the startup process to reduce rotor jamming.

[0015] As a preferred embodiment of the method of use described in the present invention, the water level of the steam-water separator is monitored during normal operation of the vacuum pump; if the water level is too low, the water replenishment amount is increased through the water replenishment bypass manual door; the cooling effect of the vacuum pump cooler is checked regularly, and the cooling water flow rate can be adjusted through the cooling water inlet manual door and the cooler return water manual door.

[0016] As a preferred embodiment of the method of use described in the present invention, the following aspects are included: during system shutdown or maintenance, the water supply solenoid valve is closed and the remaining pressurized water in the system is drained to prevent the system from being damaged or frozen; the system is regularly inspected and maintained, including but not limited to checking the atomization effect of the nozzle, the separation efficiency of the steam-water separator, and the operating status of the vacuum pump.

[0017] The beneficial effects of the present invention are as follows: replenishing water is atomized through a nozzle into the inlet pipe of the vacuum pump for replenishing water. This is the inlet pipe of the mixture of system air and water vapor of the vacuum pump. When the air water vapor entering the vacuum pump comes into contact with the misted replenishing water, most of the water vapor of the mixture condenses, thereby reducing the amount of air that must enter the vacuum pump and improving the output efficiency of the vacuum pump. Moreover, when the vacuum pump is started for the first time, replenishing water by atomizing water from the inlet pipe of the vacuum pump, and then replenishing water to the normal liquid level of the vacuum pump separator. The replenishing water process can also flush the vacuum pump rotor body, thereby reducing the risk of the vacuum pump rotor getting stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0019] Figure 1 It is a schematic diagram of the connection structure of the vacuum water replenishment system in the present invention.

[0020] Figure 2 It is a schematic diagram of the internal connection structure of the inlet pipe in the present invention. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0024] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0025] Example 1

[0026] Reference Figure 1 , which is the first embodiment of the present invention, and provides a water replenishment system for a vacuum pump of a thermal power unit, a control unit 100, and the control unit 100 includes a vacuum pump 101, a cooler 102 connected to the vacuum pump 101, a steam-water separator 103, a condenser 104 and a water supply branch 105; the water of the vacuum pump 101 goes to the steam-water separator 103, and the water of the steam-water separator 103 goes to the cooler 102 for cooling and then returns to the vacuum pump 101, forming a cycle; wherein the vacuum pump 101 includes an inlet pipe 101a, and the outer wall of the inlet pipe 101a is connected to a water supply pipe 106.

[0027] Preferably, the vacuum pump 101 is the core equipment of the entire system, and is used to maintain the vacuum state of the thermal power unit; during the operation of the vacuum pump 101, the steam-water separator 103 is used to separate steam and water to ensure the efficiency of the vacuum pump; while the vacuum pump 101 generates heat during operation, the vacuum pump cooler 102 is used to reduce the temperature of the vacuum pump 101; the condenser 104 is used to further condense the steam to improve the efficiency of the system.

[0028] In summary, by atomizing and replenishing water at the inlet pipe 101a of the vacuum pump 101, most of the water vapor in the air-water vapor is condensed, reducing the amount of air that must enter the vacuum pump, thereby improving the output efficiency of the vacuum pump.

[0029] Example 2

[0030] Reference Figure 1-2 , which is the second embodiment of the present invention. This embodiment is based on the previous embodiment, and the difference is that the water supply branch 105 includes a condensate main pipe 105a connected to the inlet pipe 101a; a water replenishment solenoid valve 105a-1 is provided on the condensate main pipe 105a, and a water replenishment bypass manual door 105a-11 is provided on one side of the water replenishment solenoid valve 105a-1.

[0031] The condensate miscellaneous main pipe is used as the source of pressure water to provide the necessary water source for the water replenishment equipment in the system.

[0032] The water replenishment solenoid valve 105a-1 is connected to the condensate miscellaneous main pipe, that is, the condensate main pipe 105a. When water replenishment is required, the solenoid valve opens to allow water to flow into the system.

[0033] The provision of the water replenishment bypass manual door 105a-11 allows manual adjustment to control the water replenishment flow rate.

[0034] Preferably, one end of the water diversion pipe 106 is passed through the inlet pipe 101a, and a plurality of nozzles 106a-1 are provided on the water diversion pipe 106 located in the inlet pipe 101a.

[0035] After the pipeline after the water supply solenoid valve 105a-1 is connected to the vacuum pump inlet pneumatic door 104a, the nozzle 106a-1 adopts an atomizing nozzle, and the nozzle and the water supply pipeline are preferably made of stainless steel with a diameter of 12mm and a length of 9cm, and 10 nozzles 106a-1 are installed on the stainless steel; Figure 2 The pressurized water from the condensate main pipe 105a enters the nozzle through the water replenishment solenoid valve 105a-1 for atomization. After the water replenishment is atomized, it is sprayed into the inlet of the vacuum pump 101 and mixed with the air-water vapor at the inlet of the vacuum pump to condense the water vapor in the air-water vapor. The condensed water vapor, other substances in the air-water vapor mixture and the water replenishment enter the vacuum pump 101. Since the condensation is carried out in the inlet pipe 101a, the inlet gas volume of the vacuum pump 101 is reduced, and the efficiency of the vacuum pump 101 is improved.

[0036] Preferably, the vacuum pump cooler 102 is provided with a water inlet manual door 102a and a water return manual door 102b.

[0037] The water inlet manual door 102a and the water return manual door 102b are used to control the inlet and outlet of cooling water to adjust the cooling effect of the cooler.

[0038] Preferably, the steam-water separator 103 is provided with a water level gauge upper manual door 103a and a water level gauge lower manual door 103b for monitoring and controlling the water level of the steam-water separator 103; the steam-water separator 103 is also provided with a water discharge manual door 103c.

[0039] Furthermore, the upper manual door 103a and the lower manual door 103b of the water level gauge are used to control the water level of the water level gauge to monitor and control the water level of the steam-water separator 103; the drain manual door 103c can be used to control and discharge the water in the steam-water separator 103 to maintain the normal operation and efficiency of the system.

[0040] Preferably, an inlet pneumatic door 104 a and an inlet electric door 104 b are provided between the condenser 104 and the vacuum pump 100 .

[0041] The inlet pneumatic door 104a and the inlet electric door 104b are used to control the opening and closing of the vacuum pump inlet to adjust the operating state of the vacuum pump.

[0042] When the system detects that the water level of the steam-water separator 103 is low, the water replenishment solenoid valve 105a-1 opens, and pressurized water enters the system through the water replenishment bypass manual door 105a-11. The water flows at the inlet of the vacuum pump 101, and the atomizing nozzle 106a-1 atomizes the water and mixes it with the air-water vapor to promote the condensation of the water vapor. The condensed water and air enter the vacuum pump 101, reducing the inlet gas volume and improving the efficiency of the vacuum pump 101. The water separated by the steam-water separator 103 is discharged through the steam-water separator water discharge manual door 103c. At the same time, the upper manual door 103a and the lower manual door 103b of the steam-water separator water level gauge are used to control the water level of the water level gauge to monitor and control the water level of the steam-water separator, and the vacuum pump cooler 102 controls the flow of cooling water through the cooling water inlet manual door 102a and the cooler return water manual door 102b, so that the temperature of the vacuum pump 101 can be kept within an appropriate range.

[0043] In summary, through the atomization water replenishment and condensation process, the gas volume at the inlet of the vacuum pump 101 is reduced, the efficiency of the vacuum pump 101 is improved, and when the vacuum pump 101 is started for the first time, the atomization water replenishment is performed through the inlet pipe 101a to flush the rotor pump body of the vacuum pump 101, thereby reducing the risk of the rotor of the vacuum pump 101 getting stuck.

[0044] Example 3

[0045] Reference Figure 1-2 , which is the third embodiment of the present invention, is based on the previous embodiment, but differs in that this embodiment proposes a method of use.

[0046] Specifically, start the vacuum pump water replenishment system of the thermal power unit to ensure that the condensate main pipe 105a is connected and filled with pressurized water; open the water replenishment solenoid valve 105a-1 to allow pressurized water to flow into the system through the solenoid valve. The opening degree of the water replenishment solenoid valve 105a can be adjusted by the control system to control the amount of water replenishment.

[0047] Preferably, check the installation position of nozzle 106a-1 to ensure that nozzle 106a-1 atomizes water and allows it to enter the interior of vacuum pump 101; before starting vacuum pump 101, atomize water through nozzle 106a-1 to ensure that the separator reaches a normal water level, and flush the vacuum pump rotor body during the startup process to reduce rotor jamming.

[0048] In detail, it is necessary to determine whether the nozzle 106a-1 is correctly installed at the position behind the vacuum pump inlet pneumatic door 104a to ensure that the nozzle 106a-1 can atomize water and spray it into the vacuum pump 101 inlet.

[0049] Preferably, during normal operation of the vacuum pump 101, the water level of the steam-water separator 103 is monitored to ensure that the water level is maintained within an appropriate range; if the water level is too low, the water replenishment amount is increased through the water replenishment bypass manual door 105a-11; the cooling effect of the vacuum pump cooler 102 is regularly checked, and the cooling water flow rate can be adjusted through the cooling water inlet manual door 102a and the cooler return water manual door 102b.

[0050] Preferably, during system shutdown or maintenance, the water replenishment solenoid valve 105a-1 is closed and the remaining pressurized water in the system is drained to prevent system damage or freezing; the system is regularly inspected and maintained, including but not limited to checking the atomization effect of the nozzle 106a-1, the separation efficiency of the steam-water separator 103, and the operating status of the vacuum pump 101.

[0051] The pressurized water from the condensate miscellaneous main pipe 105a enters the system through the water supply solenoid valve 105a-1. After passing through the water supply bypass manual door 105a-11, the water enters the atomizing nozzle 106a-1 and is atomized at the inlet of the vacuum pump 101. The atomized water is mixed with the air-water vapor at the inlet of the vacuum pump 101 to promote the condensation of water vapor. The condensed water vapor, other substances in the air-water vapor mixture and the water supply enter the vacuum pump 10. Since the condensation is carried out in the inlet pipe 101a, the inlet gas volume of the vacuum pump 101 is reduced, and the efficiency of the vacuum pump is improved. The condensed water and air enter the vacuum pump 101, and the vacuum pump extracts the mixture to maintain the vacuum state of the thermal power unit. In the steam-water separator 103, water and air are separated, water is collected, and then air is extracted by the vacuum pump 101. The vacuum pump cooler 102 is used to reduce the heat generated by the vacuum pump 101 during operation.

[0052] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0053] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0054] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A water replenishment system for a vacuum pump of a thermal power unit, characterized in that: include, A control unit (100), the control unit (100) comprising a vacuum pump (101), a cooler (102) connected to the vacuum pump (101), a steam-water separator (103), a condenser (104) and a water delivery branch (105); The water in the vacuum pump (101) flows into the steam-water separator (103), and the water in the steam-water separator (103) flows into the cooler (102) for cooling and then returns to the vacuum pump (101), thus forming a cycle; The vacuum pump (101) comprises an inlet pipe (101a), and the outer wall of the inlet pipe (101a) is connected to a water supply pipe (106).

2. The water replenishment system for the vacuum pump of a thermal power unit according to claim 1, characterized in that: The water delivery branch (105) comprises a condensate main pipe (105a), a water replenishment electromagnetic valve (105a-1) is provided on the condensate main pipe (105a), and a water replenishment bypass manual door (105a-11) is provided on one side of the water replenishment electromagnetic valve (105a-1).

3. The water replenishment system for the vacuum pump of a thermal power unit according to claim 2, characterized in that: One end of the water diversion pipe (106) is inserted into the inlet pipe (101a), and a plurality of nozzles (106a-1) are arranged on the water diversion pipe (106) located in the inlet pipe (101a).

4. The water replenishment system for the vacuum pump of a thermal power unit according to claim 3, characterized in that: The cooler (102) is provided with a manual water inlet door (102a) and a manual water return door (102b).

5. The water replenishment system for the vacuum pump of a thermal power unit according to claim 4, characterized in that: The steam-water separator (103) is provided with a water level gauge upper manual door (103a) and a water level gauge lower manual door (103b) for monitoring and controlling the water level of the steam-water separator (103); The steam-water separator (103) is also provided with a manual drain door (103c).

6. The water replenishment system for the vacuum pump of a thermal power unit according to claim 5, characterized in that: An inlet pneumatic door (104a) and an inlet electric door (104b) are provided between the condenser (104) and the vacuum pump (100).

7. A method of use, characterized in that: A boiler fly ash sampling system comprising any one of claims 1 to 6; and Start the vacuum pump water replenishment system of the thermal power unit to ensure that the condensate main pipe (105a) is connected and filled with pressurized water; The water replenishment solenoid valve (105a-1) is opened to allow pressurized water to flow into the system through the solenoid valve. The opening degree of the water replenishment solenoid valve (105a) can be adjusted by the control system to control the amount of water replenishment.

8. The method of use according to claim 7, characterized in that: Checking the installation position of the nozzle (106a-1) to ensure that the nozzle (106a-1) atomizes the water and allows it to enter the interior of the vacuum pump (101); Before the vacuum pump (101) is started, atomized water is replenished through the nozzle (106a-1) to ensure that the separator reaches a normal water level, and the vacuum pump rotor body is flushed during the startup process to reduce rotor jamming.

9. The method of use according to claim 8, characterized in that: During normal operation of the vacuum pump (101), monitoring the water level of the steam-water separator (103); If the water level is too low, the water replenishment amount is increased through the water replenishment bypass manual door (105a-11); The cooling effect of the vacuum pump cooler (102) is checked regularly, and the cooling water flow rate can be adjusted by the cooling water inlet manual door (102a) and the cooler return water manual door (102b).

10. The method of use according to claim 9, characterized in that: During system shutdown or maintenance, close the water supply solenoid valve (105a-1) and drain the remaining pressurized water in the system to prevent system damage or freezing; The system is regularly inspected and maintained, including but not limited to inspecting the atomization effect of the nozzle (106a-1), the separation efficiency of the steam-water separator (103), and the operating status of the vacuum pump (101).

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