Steam turbine hot well water replenishing system

Abstract

The utility model provides a steam turbine hot well water supplementing system. The steam turbine hot well water supplementing system comprises a condenser, a hot well, a deaerator, a water outlet valve, a condensation pump, a spraying valve, a water supplementing valve, a water conveying pipe, a spraying pipe, a desalted water main pipe and a water supplementing pipe. The hot well is arranged at the bottom of the condenser; the hot well is communicated with the deaerator through the water conveying pipe; the water outlet valve and the condensate pump are arranged on the water conveying pipe; the spraying valve is arranged on the spraying pipe, one end of the spraying pipe is communicated with the desalted water mother pipe, and the other end of the spraying pipe is communicated with the condenser or the hot well; the water replenishing valve is arranged on the water replenishing pipe, and the water replenishing pipe is used for conveying water in the demineralized water main pipe into the water conveying pipe so as to replenish water to the deaerator. Compared with the mode that a drainage pump and a drainage tank are directly adopted for supplementing water to the deaerator, the device cost is reduced, and the operation cost of the turboset is greatly reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of hot well water replenishment, and in particular relates to a steam turbine hot well water replenishment system. Background Art

[0002] A steam turbine is a power machine that converts the thermal energy of steam into mechanical energy. When the steam turbine unit is supplying heat, a large amount of working medium steam generated by the boiler is transported to the heat user. In the process of steam working, the heat user and the power generation equipment itself will lose some steam and condensate. The loss of steam and water directly affects the safe and economical operation of the power plant. Therefore, the steam turbine unit must be replenished with water in time. The commonly used water replenishment system for steam turbine units is the hot well water replenishment system. In the prior art, the hot well water replenishment system generally includes a condenser and a hot well. When working, the condenser condenses the exhaust gas of the steam turbine into water and enters the hot well. The condensate in the hot well is then transported to the deaerator through a condensate pump. In actual application, the water level of the hot well is an important parameter to ensure the normal operation of the steam turbine unit. If the water level of the hot well is higher than the air cooling area of ​​the condenser and the evacuation pipeline, the air in the condenser cannot be pumped out, and the exhaust steam of the low-pressure cylinder cannot be condensed in time. Even worse, some copper pipes will be submerged, thereby reducing the heat exchange area of ​​the condenser, causing the vacuum system of the unit to fail to operate normally, and the reduction of the unit vacuum will cause the unit to trip. Therefore, the high liquid level of the condenser hot well will have a greater impact on the vacuum of the unit. When the water level of the hot well is too low, it is easy to cause cavitation of the condensate pump. In severe cases, it will also cause the condensate pump to trip or vaporize, affecting the normal water supply of the boiler and endangering the safe operation of the unit. In this regard, the water level in the hot well is generally adjusted by adding spray water to the condenser or hot well. However, when the heat supply of the steam turbine unit is large, spray water alone cannot meet the water replenishment demand of the hot well. At this time, additional drain pumps and drain tanks are required to replenish water for the deaerator. This greatly increases the power consumption of the steam turbine unit during operation, increases a lot of energy consumption, and thus increases the operating cost of the steam turbine unit. It can be seen that how to reduce the operating cost of the steam turbine unit when the heat supply is large has become a problem that people need to solve. Utility Model Content

[0003] In view of the technical problems in the background technology, the present application proposes a steam turbine hot well water replenishment system to effectively reduce the operating power consumption of the steam turbine unit when the heat supply is large, thereby reducing its operating cost.

[0004] In order to achieve the above-mentioned purpose, this application adopts the following technical solutions:

[0005] A steam turbine hot well water replenishment system, comprising a condenser, a hot well, a deaerator, a water outlet valve, a condensate pump, a spray valve, a water replenishment valve, a water delivery pipe, a spray pipe, a desalted jellyfish pipe and a water replenishment pipe;

[0006] The hot well is arranged at the bottom of the condenser to receive condensed water from the condenser;

[0007] The hot well is connected to the deaerator through the water pipe, which is used to transport the condensed water in the hot well to the deaerator;

[0008] The water outlet valve and the condensate pump are both arranged on the water delivery pipe, and the water outlet valve is arranged at one end close to the deaerator, and the condensate pump is arranged at one end close to the hot well;

[0009] The spray valve is arranged on the spray pipe, one end of which is connected to the desalted jellyfish pipe, and the other end of which is connected to the condenser or the hot well, and is used to transport the water in the desalted jellyfish pipe to the hot well to replenish the hot well;

[0010] The water replenishment valve is arranged on the water replenishment pipe, one end of the water replenishment pipe is connected to the position on the desalted jellyfish pipe or the spray pipe corresponding to the position between the spray valve and the desalted jellyfish pipe, and the other end is connected to the position on the water supply pipe corresponding to the position between the condensate pump and the hot well, and is used to transport the water in the desalted jellyfish pipe to the water supply pipe to replenish the deaerator.

[0011] Furthermore, the hot well water replenishment system also includes a drain tank, a drain pump, a drain tank water inlet valve, a drain tank outlet pipe and a drain tank inlet pipe;

[0012] The drain tank is connected to the deaerator through the drain tank outlet pipe, and the drain pump is arranged on the drain tank outlet pipe, and is used to transport the water in the drain tank to the deaerator through the drain tank outlet pipe;

[0013] The drain tank is connected to the desalted jellyfish pipe through the drain tank water inlet pipe, and the drain tank water inlet valve is arranged on the drain tank water inlet pipe.

[0014] Furthermore, the water outlet valve adopts an electric regulating valve PN40DN125.

[0015] Furthermore, the spray valve adopts an electric regulating door PN16DN100.

[0016] Furthermore, the water supply valve adopts a Z41H-PN16DN50 valve.

[0017] Furthermore, the water pipe is a DN200 pipe.

[0018] Furthermore, the desalination jellyfish pipe is a DN100 pipe.

[0019] Furthermore, the water supply pipe is a DN50 pipe.

[0020] Furthermore, the drain pump used is a drain pump with a single power of 37KW.

[0021] The beneficial effects of this application are:

[0022] The present application connects the desalted jellyfish pipe with the water supply pipe by setting a water supply pipe and a water supply valve. When in use, the water in the desalted jellyfish pipe can be directly transported to the condensate pump by adjusting the water supply valve to directly replenish water in the deaerator, thereby meeting the water supply demand of the steam turbine unit when the heat supply is large. At the same time, there is no need to add additional water pumps for water supply during operation. Compared with the use of drain pumps and drain tanks for water replenishment, it not only reduces the equipment cost but also greatly reduces the operating cost of the steam turbine unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0024] Figure 1 A schematic diagram of the structure of a steam turbine hot well water replenishment system provided in an embodiment of the present application.

[0025] Description of Figure Numbers:

[0026] Condenser 1, hot well 2, deaerator 3, water outlet valve 4, condensate pump 5, spray valve 6, water supply valve 7, water delivery pipe 8, spray pipe 9, desalted jellyfish pipe 10, water supply pipe 11, drain tank 12, drain pump 13, drain tank water inlet valve 14, drain tank water outlet pipe 15, drain tank water inlet pipe 16. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0028] In the description of the present application, it should 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" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; 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. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0032] The following equipment and pipelines are used in the present application:

[0033] The outlet valve 4 adopts an electric regulating valve PN40DN125, the spray valve 6 adopts an electric regulating valve PN16DN100, the water supply valve 7 adopts a Z41H-PN16DN50 valve, the desalination jellyfish pipe 10 adopts a DN100 pipe, the water supply pipe 11 adopts a DN50 pipe, the water delivery pipe 8 adopts a DN200 pipe, and the drain pump adopts a single drain pump with a power of 37KW.

[0034] Other devices not marked with specific specifications / models used in the following embodiments of the present application are all commercially available products known to ordinary technicians in the field.

[0035] The present application embodiment provides a steam turbine hot well water replenishment system, such as Figure 1 As shown, it includes a condenser 1, a hot well 2, a deaerator 3, a water outlet valve 4, a condensate pump 5, a spray valve 6, a water supply valve 7, a water delivery pipe 8, a spray pipe 9, a desalted jellyfish pipe 10 and a water supply pipe 11; wherein the hot well 2 is arranged at the bottom of the condenser 1 for receiving the condensed water condensed by the condenser 1; the hot well 2 is connected to the deaerator 3 through the water delivery pipe 8, which is used to transport the condensed water in the hot well 2 to the deaerator 3; the water outlet valve 4 and the condensate pump 5 are both arranged on the water delivery pipe 8, and the water outlet valve 4 is arranged at one end close to the deaerator 3, and the condensate pump 5 is arranged at one end close to the hot well 2; when in use, when it is necessary to replenish water in the deaerator 3, the water outlet valve 4 is opened, and the condensate pump 5 is started at this time, and the water in the hot well 2 first enters the condensate pump 5 and then is pumped into the deaerator 3 by the condensate pump 5.

[0036] The spray valve 6 is arranged on the spray pipe 9, one end of the spray pipe 9 is connected to the desalted jellyfish pipe 10, and the other end is connected to the condenser 1, and is used to transport the water in the desalted jellyfish pipe 10 to the hot well 2 to replenish the hot well 2; in actual application, the spray pipe 9 can also be directly connected to the hot well 2, and its main purpose is to transport the water in the desalted jellyfish pipe 10 to the hot well 2 to replenish the hot well 2. Therefore, technicians in this field can choose other commonly used connection methods in the prior art to achieve the above-mentioned effects according to actual needs; at the same time, in application, the desalted jellyfish pipe 10 is connected to an external desalted water source.

[0037] The water replenishment valve 7 is arranged on the water replenishment pipe 11, one end of the water replenishment pipe 11 is connected to the position on the spray pipe 9 corresponding to the spray valve 6 and the desalination jellyfish pipe 10, and the other end is connected to the position on the water delivery pipe 8 corresponding to the condensation pump 5 and the hot well 2, and is used to transport the water in the desalination jellyfish pipe 10 to the water delivery pipe 8 to further replenish the deaerator 3. In actual application, the end of the water replenishment pipe 11 connected to the spray pipe 9 can also be directly connected to the desalination jellyfish pipe 10, and its main purpose is to transport the water in the desalination jellyfish pipe 10 to the water delivery pipe 8 to further replenish the deaerator 3. Therefore, technicians in this field can select other connection methods commonly used in the prior art according to actual needs to achieve the above-mentioned effects.

[0038] In some other embodiments, in order to further increase the water replenishment amount of the deaerator 3, the hot well water replenishment system also includes a drain tank 12, a drain pump 13, a drain tank water inlet valve 14, a drain tank outlet pipe 15 and a drain tank inlet pipe 16; the drain tank 12 is connected to the deaerator 3 through the drain tank outlet pipe 15, and the drain pump 13 is arranged on the drain tank outlet pipe 15, and is used to transport the water in the drain tank 12 to the deaerator 3 through the drain tank outlet pipe 15; the drain tank 12 is connected to the desalted jellyfish pipe 10 through the drain tank inlet pipe 16, and the drain tank inlet valve 14 is arranged on the drain tank inlet pipe 16. During use, when it is necessary to further increase the water replenishment amount of the deaerator 3, the drain tank water inlet valve 14 is started to transport the water in the desalted jellyfish pipe 10 to the drain tank 12, and then the water in the drain tank 12 is transported to the deaerator 3 through the drain pump 13.

[0039] According to the specifications / models of the various equipment / pipelines used in the above embodiments of the present application, in the prior art, when the hot well water replenishment system relies solely on the spray pipe to replenish the hot well, the replenishment amount is only 3t / h. At this time, when the pure condensation or gas supply of the entire steam turbine unit is 5t / h-20t / h, it is necessary to start a drain pump (single power 37KW) to cooperate with the drain tank to replenish the deaerator. When the external steam extraction is greater than 20t / h, it is necessary to start two drain pumps to cooperate with the drain tank to replenish the deaerator. The above embodiment of the present application sets a water supply pipe between the desalted jellyfish pipe and the water supply pipe. When in use, the water in the desalted jellyfish pipe can be directly transported to the condensate pump by adjusting the water supply valve to directly supply water to the deaerator to meet the water supply demand of the steam turbine unit when the heat supply is large. During operation, there is no need to add an additional water pump to transport water to meet the water supply of the steam turbine unit in the case of pure condensation and gas supply of 5t / h-20t / h. When the steam extraction outside the steam turbine unit is greater than 20t / h, only one drain pump needs to be started to cooperate with the drain tank to supply water to the deaerator. Compared with the existing technology, this can save at least 20KW.h of electricity per hour.

[0040] The above is a detailed introduction to a steam turbine hot well water replenishment system provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A steam turbine hot well water replenishment system, characterized in that: Including condenser, hot well, deaerator, water outlet valve, condensate pump, spray valve, water supply valve, water delivery pipe, spray pipe, desalted jellyfish pipe and water supply pipe; The hot well is arranged at the bottom of the condenser to receive condensed water from the condenser; The hot well is connected to the deaerator through the water pipe, which is used to transport the condensed water in the hot well to the deaerator; The water outlet valve and the condensate pump are both arranged on the water delivery pipe, and the water outlet valve is arranged at one end close to the deaerator, and the condensate pump is arranged at one end close to the hot well; The spray valve is arranged on the spray pipe, one end of which is connected to the desalted jellyfish pipe, and the other end of which is connected to the condenser or the hot well, and is used to transport the water in the desalted jellyfish pipe to the hot well to replenish the hot well; The water replenishment valve is arranged on the water replenishment pipe, one end of the water replenishment pipe is connected to the position on the desalted jellyfish pipe or the spray pipe corresponding to the position between the spray valve and the desalted jellyfish pipe, and the other end is connected to the position on the water supply pipe corresponding to the position between the condensate pump and the hot well, and is used to transport the water in the desalted jellyfish pipe to the water supply pipe to replenish the deaerator.

2. The steam turbine hot well water replenishment system according to claim 1, characterized in that: The hot well water replenishment system also includes a drain tank, a drain pump, a drain tank water inlet valve, a drain tank outlet pipe and a drain tank inlet pipe; The drain tank is connected to the deaerator through the drain tank outlet pipe, and the drain pump is arranged on the drain tank outlet pipe, and is used to transport the water in the drain tank to the deaerator through the drain tank outlet pipe; The drain tank is connected to the desalted jellyfish pipe through the drain tank water inlet pipe, and the drain tank water inlet valve is arranged on the drain tank water inlet pipe.

3. The steam turbine hot well water replenishment system according to claim 1, characterized in that: The water outlet valve adopts an electric regulating valve PN40DN125.

4. The steam turbine hot well water replenishment system according to claim 1, characterized in that: The spray valve adopts an electric regulating door PN16DN100.

5. The steam turbine hot well water replenishment system according to claim 1, characterized in that: The water supply valve used is a Z41H-PN16DN50 valve.

6. The steam turbine hot well water replenishment system according to claim 1, characterized in that: The water delivery pipe is a DN200 pipe.

7. The steam turbine hot well water replenishment system according to claim 1, characterized in that: The desalination jellyfish pipe adopts a DN100 pipe.

8. The steam turbine hot well water replenishment system according to claim 1, characterized in that: The water supply pipe is a DN50 pipe.

9. The steam turbine hot well water replenishment system according to claim 2, characterized in that: The drain pump used is a drain pump with a single power of 37KW.

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