CN216278035U

CN216278035U - Closed water system economizer of power plant

Info

Publication number: CN216278035U
Application number: CN202122378630.0U
Authority: CN
Inventors: 程瑞华; 吕海涛; 林卓驰; 王兴泉; 江明; 刘雪成; 黄鑫; 陈磊; 王峰; 丁炜; 朱致军; 蒋思磊
Original assignee: Huaneng Qinmei Ruijin Power Generation Co Ltd
Current assignee: Huaneng Qinmei Ruijin Power Generation Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-04-12
Anticipated expiration: 2031-09-29

Abstract

The utility model discloses an energy-saving device for a closed water system of a power plant, which comprises a device main body, wherein the device main body comprises a first closed circulation component, a second closed circulation component, a first water inlet main door and a first water outlet main door which are arranged on the first closed circulation component, a second water inlet main door and a second water outlet main door which are arranged on the second closed circulation component, a water inlet communication pipe with two ends respectively connected with the first water inlet main door and the second water outlet main door, and a water outlet communication pipe with two ends respectively connected with the first water outlet main door and the second water outlet main door. The utility model has the advantages that the communication main pipe is additionally arranged behind the closed cooling water main doors of the two units, so that the units can be conveniently operated to supply cooling water for the dispatching units, the closed water system of the unit can be shut down after the unit is shut down, and the closed water and power consumption of the shut-down unit is reduced. Meanwhile, as the EH oil cooler and the high-pressure main valve oil cylinder cooler need less cooling water, the power consumption of the closed pump of the adjacent engine is almost unchanged.

Description

Closed water system economizer of power plant

Technical Field

The utility model relates to the technical field of energy conservation of power plants, in particular to an energy-saving device for a closed water system of a power plant.

Background

At present, the closed water systems of the conventional design of the power plant are all unit systems, and each unit is provided with one set of closed water system without communication. At present, the EH oil cooler of the No. 1 and No. 2 unit and the cooling water of the high-pressure main valve oil cylinder are provided by a closed jellyfish pipe of the unit, and under the configuration of the current closed cooling water system, after the unit is shut down, because the temperature of a valve of a steam turbine is higher and the temperature of the EH oil is higher, the closed cooling water system cannot be shut down, the unit normally needs to run for a week, and the power consumption of the closed cooling water system is increased.

SUMMERY OF THE UTILITY MODEL

This section is for the purpose of summarizing some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the utility model.

The present invention has been made keeping in mind the above problems occurring in the prior art.

Therefore, the utility model aims to provide a closed water system energy-saving device for a power plant, which can be quickly shut down to maintain equipment and save electric power.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a power plant's closed water system economizer, it includes the device main part, including first closed circulation subassembly, second closed circulation subassembly, set up first total door of intaking and first total door of play water on first closed circulation subassembly, set up second total door of intaking and second total door of play water on second closed circulation subassembly, both ends respectively with the water intake connecting pipe that first total door of intaking and second total door of play water are connected, and the play water connecting pipe that both ends are connected with first total door of play water and second total door of play water respectively.

As a preferred scheme of the energy-saving device for the closed water system of the power plant, the energy-saving device comprises the following components: the first closed circulation assembly and the second closed circulation assembly are identical in structure.

As a preferred scheme of the energy-saving device for the closed water system of the power plant, the energy-saving device comprises the following components: and a plurality of groups of valves are arranged on the water inlet connecting pipe and the water outlet connecting pipe.

As a preferred scheme of the energy-saving device for the closed water system of the power plant, the energy-saving device comprises the following components: the first closed circulation assembly comprises a circulation pipeline, a closed water heat exchanger arranged on the circulation pipeline, a closed water pump connected with the closed water heat exchanger, an EH oil cooler water inlet adjusting door connected with the circulation pipeline, and an EH oil cooler connected with the EH oil cooler water inlet adjusting door.

As a preferred scheme of the energy-saving device for the closed water system of the power plant, the energy-saving device comprises the following components: the closed water heat exchangers are arranged into two groups.

As a preferred scheme of the energy-saving device for the closed water system of the power plant, the energy-saving device comprises the following components: the closed water pumps are arranged into two groups.

As a preferred scheme of the energy-saving device for the closed water system of the power plant, the energy-saving device comprises the following components: the EH oil coolers are arranged in two groups.

As a preferred scheme of the energy-saving device for the closed water system of the power plant, the energy-saving device comprises the following components: the first closed cycle assembly also includes a high pressure main port connected to the circulation line.

As a preferred scheme of the energy-saving device for the closed water system of the power plant, the energy-saving device comprises the following components: the water inlet connecting pipe is provided with four groups of valves, and the water outlet connecting pipe is provided with four groups of valves.

As a preferred scheme of the energy-saving device for the closed water system of the power plant, the energy-saving device comprises the following components: the valve is a manual ball valve.

The utility model has the beneficial effects that: according to the utility model, the communication main pipe is additionally arranged behind the closed cooling water main doors of the two units, so that the units can be conveniently operated to supply cooling water for the dispatching units, the closed water system of the unit can be shut down after the unit is shut down, and the power consumption of the closed water of the unit is reduced. Meanwhile, as the EH oil cooler and the high-pressure main valve oil cylinder cooler need less cooling water, the power consumption of the closed pump of the adjacent engine is almost unchanged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is a structural diagram of a first embodiment of an energy-saving device of a closed water system of a power plant.

Fig. 2 is a structural diagram of a second embodiment of the energy-saving device of the closed water system of the power plant.

Fig. 3 is a structural diagram of a second embodiment of the energy-saving device of the closed water system of the power plant.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 2, a first embodiment of the present invention provides an energy saving device for a closed water system of a power plant, which can quickly perform start-stop maintenance on the system and reduce energy consumption.

Specifically, the device main body 100 includes a first closed circulation component 101, a second closed circulation component 102, a first water inlet main door 103 and a first water outlet main door 104 which are arranged on the first closed circulation component 101, a second water inlet main door 105 and a second water outlet main door 106 which are arranged on the second closed circulation component 102, a water inlet connecting pipe 107 whose two ends are respectively connected with the first water inlet main door 103 and the second water outlet main door 106, and a water outlet connecting pipe 108 whose two ends are respectively connected with the first water outlet main door 104 and the second water outlet main door 106. The circulation pipeline 101a is provided with a valve 109, and the valve 109 is a manual ball valve and comprises a ball valve handle 109a and a ball valve seat 109 b. The first water inlet main door 103, the first water outlet main door 104, the second water inlet main door 105 and the second water outlet main door 106 are all switch valves, and comprise a switch handle 103a and a switch valve seat 103 b. The manual ball valve can adopt the prior art, such as a ball valve with the model number HK-5004, and the switch valve can adopt the prior art, such as a valve with the model number Z41W-16P. The two groups of connecting pipes can be steel pipes.

It should be noted that the first closed circulation module 101 and the second closed circulation module 102 are devices requiring cooling, and a heat exchange pipeline is arranged in the devices, and each device is provided with a water pump with a model number of 300S10A for providing power for water circulation, which is not shown in the figure. When one of the two units is stopped, the other unit in operation enables cooling water in the unit in operation to be conveyed to the unit in operation through the water inlet connecting pipe 107 communicated with the water inlet main door, the unit in operation is cooled, the used cooling water flows back to the unit in operation through the water outlet connecting pipe 108, the process is finished until the unit in operation is completely cooled, and a worker closes the water door.

Example 2

Referring to fig. 3, a second embodiment of the present invention provides an energy saving device for a closed water system of a power plant, which can quickly start and stop the system, reduce energy consumption, and improve the stability of a unit.

Specifically, the device main body 100 includes a first closed circulation component 101, a second closed circulation component 102, a first water inlet main door 103 and a first water outlet main door 104 which are arranged on the first closed circulation component 101, a second water inlet main door 105 and a second water outlet main door 106 which are arranged on the second closed circulation component 102, a water inlet connecting pipe 107 whose two ends are respectively connected with the first water inlet main door 103 and the second water outlet main door 106, and a water outlet connecting pipe 108 whose two ends are respectively connected with the first water outlet main door 104 and the second water outlet main door 106. The two groups of connecting pipes can be steel pipes.

Further, the first closed cycle assembly 101 and the second closed cycle assembly 102 are identical in structure.

Furthermore, a plurality of groups of valves 109 are arranged on the water inlet connecting pipe 107 and the water outlet connecting pipe 108.

Further, the first closed circulation module 101 includes a circulation line 101a, a closed water heat exchanger 101b disposed on the circulation line 101a, a closed water pump 101c connected to the closed water heat exchanger 101b, an EH oil cooler intake adjustment door 101d connected to the circulation line 101a, and an EH oil cooler 101e connected to the EH oil cooler intake adjustment door 101 d. The closed water pump 101c provides power for water circulation, and the EH oil cooler water inlet adjusting door 101d adjusts the inlet and outlet aperture of cooling water so as to achieve the effect of adjusting cooling power.

Further, the closed water heat exchangers 101b are arranged in two groups. The closed water pumps 101c are arranged in two groups. The EH oil coolers 101e are provided in two groups. The service life of the whole machine set is prolonged, and the stability and the cooling efficiency of the machine set are improved by arranging the standby equipment.

Further, the first closed cycle assembly 101 further includes a high pressure main valve 101f connected to the circulation line 101 a. The high-pressure main port 101f is an external port, and cooling water may be mixed therein as necessary to cool the remaining devices.

Further, the water inlet connecting pipe 107 is provided with four sets of valves 109, and the water outlet connecting pipe 108 is provided with four sets of valves 109. The valve 109 is a manual ball valve.

The working principle of the system is as follows: the first closed circulation assembly 101 and the second closed circulation assembly 102 are respectively a machine No. 1 and a machine No. 2, cooling water of an EH oil cooler and cooling water of a high-pressure main valve oil cylinder of the machine No. 1 and the machine No. 2 are provided by a closed water main pipe, and the cooling water is divided into two paths from the closed water main pipe and respectively goes to the EH oil cooler and the high-pressure main valve oil cylinder. When one unit is shut down and the closed water pump is shut down, the EH oil cooler and the high-pressure main valve oil cylinder do not have cooling water sources, EH oil cannot be cooled, the operation of an EH oil system is influenced, the closed water system is continuously operated for one week when shut down is estimated every time, and the power consumption of the whole plant is increased. Therefore, an EH oil cooling water main door is additionally arranged in front of the oil cylinder of the EH oil cooler and the high-pressure main valve of the two unit closed water main pipes, and a backwater main door is also additionally arranged in the same way of the backwater main pipe. Meanwhile, a main contact pipe is additionally arranged behind the cooling water inlet main door and the cooling water return main door of the two machines, so that the units can be conveniently operated to supply cooling water for the dispatching units, the closed water system of the shutdown units can be shut down in time, and the power consumption of the whole plant is reduced. The service life of the whole machine set is prolonged, and the stability and the cooling efficiency of the machine set are improved by arranging the standby equipment.

Only 2 steel pipes with the diameter of 32 are required to be added for 20 meters, and 8 manual ball valves are matched, so that the investment cost is low and the cost is 7000 yuan. The current of the closed pump after the transformation is reduced by 80A, the total shut-down time of the double machines in one year is calculated to be 4 multiplied by 7 multiplied by 24 hours, and the transformation yield is estimated:

1.732×380V×80A×0.8＝42KW，42KW×4×7×24＝28224KW，

28224KW multiplied by 0.41 yuan is 1.15 ten thousand yuan, which is applied in power plants at present, and the income is considerable.

In conclusion, the communication main pipe is additionally arranged behind the two closed cooling water main doors, so that the units can be conveniently operated to supply cooling water for the conditioning unit, the closed water system of the machine can be stopped after the units are stopped, and the closed water power consumption of the stopped unit is reduced. Meanwhile, as the EH oil cooler and the high-pressure main valve oil cylinder cooler need less cooling water, the power consumption of the closed pump of the adjacent engine is almost unchanged.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the utility model, or those unrelated to enabling the utility model).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. The utility model provides a power plant's closed water system economizer which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the device main body (100) comprises a first closed type circulation assembly (101), a second closed type circulation assembly (102), a first water inlet main door (103) and a first water outlet main door (104) which are arranged on the first closed type circulation assembly (101), a second water inlet main door (105) and a second water outlet main door (106) which are arranged on the second closed type circulation assembly (102), a water inlet connecting pipe (107) with two ends respectively connected with the first water inlet main door (103) and the second water outlet main door (106), and a water outlet connecting pipe (108) with two ends respectively connected with the first water outlet main door (104) and the second water outlet main door (106).

2. The power plant closed water system energy-saving device of claim 1, characterized in that: the first closed cycle assembly (101) and the second closed cycle assembly (102) are identical in structure.

3. The power plant closed water system energy saving device of claim 2, characterized in that: the water inlet connecting pipe (107) and the water outlet connecting pipe (108) are provided with a plurality of groups of valves (109).

4. The power plant closed water system energy saving device of claim 3, characterized in that: the first closed circulation assembly (101) comprises a circulation pipeline (101a), a closed water heat exchanger (101b) arranged on the circulation pipeline (101a), a closed water pump (101c) connected with the closed water heat exchanger (101b), an EH oil cooler water inlet adjusting door (101d) connected with the circulation pipeline (101a), and an EH oil cooler (101e) connected with the EH oil cooler water inlet adjusting door (101 d).

5. The power plant closed water system energy saving device of claim 4, characterized in that: the closed water heat exchangers (101b) are arranged in two groups.

6. The power plant closed water system energy saving device of claim 5, characterized in that: the closed water pumps (101c) are arranged into two groups.

7. The power plant closed water system energy saving device of claim 6, characterized in that: the EH oil coolers (101e) are provided in two groups.

8. The energy-saving device for the closed water system of the power plant as claimed in any one of claims 5 to 7, wherein: the first closed cycle assembly (101) further comprises a high pressure main valve (101f) connected to the circulation line (101 a).

9. The energy-saving device for the closed water system of the power plant as claimed in any one of claims 5 to 7, wherein: the water inlet connecting pipe (107) is provided with four groups of valves (109), and the water outlet connecting pipe (108) is provided with four groups of valves (109).

10. The energy-saving device for the closed water system of the power plant as claimed in any one of claims 5 to 7, wherein: the valve (109) is a manual ball valve.