CN218820625U

CN218820625U - High-pressure bypass heating system of coupling compressed air energy storage

Info

Publication number: CN218820625U
Application number: CN202223543687.2U
Authority: CN
Inventors: 向鹏; 庞永超; 刘培栋; 雷俊鹏; 司亚斌; 徐耀博; 赵晓军; 李明; 张鸿泉
Original assignee: Rundian Energy Science and Technology Co Ltd
Current assignee: Rundian Energy Science and Technology Co Ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2023-04-07
Anticipated expiration: 2032-12-21

Abstract

The utility model relates to the technical field of heating systems, in particular to a high-pressure bypass heating system with coupled compressed air energy storage, which comprises a back press, a gas compressor, a first heat exchanger, a gas storage chamber, a second heat exchanger, an expander, a first generator, a unit, a hot tank and a cold tank, wherein the back press is connected with external main steam; the gas compressor is coaxially connected with the back pressure machine; the first heat exchanger is connected with the gas compressor; the air storage chamber is connected with the first heat exchanger; the second heat exchanger is connected with the air storage chamber; the expansion machine is connected with the second heat exchanger; the first generator is coaxially connected with the expander; the unit is connected with the generator; the hot tank is used for storing heating media and is respectively connected with the first heat exchanger and the second heat exchanger; the cold tank is used for storing cooling media and is respectively connected with the first heat exchanger and the second heat exchanger. The utility model discloses can make full use of steam energy for the reserve energy reduces the energy extravagant, and improves energy utilization and rate, and be used for the quick load-raising of unit.

Description

High-pressure bypass heating system of coupling compressed air energy storage

Technical Field

The utility model relates to a heating system technical field especially relates to a high pressure bypass heating system of coupling compressed air energy storage.

Background

In order to increase the heat supply capacity and the deep peak regulation capacity of the thermal power unit and increase the flexibility of a power grid, the existing thermal power unit flexibility modification technology comprises the following steps: bypass heat supply, optical axis heat supply, high back pressure heat supply, electric boiler, low pressure jar cut jar etc. and the energy storage technology has: heat storage (molten salt, water, etc.), compressed air energy storage, flywheel energy storage, battery energy storage, pumped water energy storage, hydrogen energy storage, electromagnetic energy storage, etc.

Wherein, the bypass heat supply is from steam turbine owner steam pipe last extraction of punching, merges high pressure cylinder exhaust pipe with steam after the decompression reduces the temperature, later extracts steam as the supplementary vapour source of heat supply extraction from low pressure bypass (heat again) back, but along with the heat increase is used to the heat user, bypass steam flow also increases thereupon, and a large amount of steam flow does not obtain abundant utilization can cause serious energy waste.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high pressure bypass heating system of coupling compressed air energy storage can make full use of steam energy for the reserve energy, it is extravagant to reduce the energy, and improve energy utilization and rate, and be used for the quick load-lifting of unit.

In order to solve the technical problem, the utility model provides a high pressure bypass heating system of coupling compressed air energy storage, include:

a back press connected with an external main steam;

the gas compressor is coaxially connected with the back pressure machine;

the first heat exchanger is connected with the compressor;

the air storage chamber is connected with the first heat exchanger;

the second heat exchanger is connected with the air storage chamber;

the expander is connected with the second heat exchanger;

a first generator coaxially connected with the expander;

the unit is connected with the generator;

the hot tank is used for storing a heating medium and is respectively connected with the first heat exchanger and the second heat exchanger;

and the cold tank is used for storing a cooling medium and is respectively connected with the first heat exchanger and the second heat exchanger.

Optionally, the high-pressure bypass heating system further includes a reheater and a heating steam header connected in sequence; the reheater is connected to the backpressure machine.

Optionally, the high pressure bypass heating system further comprises a pressure increasing valve connected with the heating steam header.

Optionally, the unit includes a first transformer and a second transformer, and the first transformer and the second transformer are respectively connected to the first generator.

Optionally, the unit further includes a second generator, a low-pressure cylinder, a medium-pressure cylinder, and a high-pressure cylinder, which are connected in sequence, and the second generator is connected to the first transformer and the second transformer, respectively.

Optionally, the unit further includes a condenser, and the condenser is connected with the low-pressure cylinder.

According to foretell coupling compressed air energy storage high pressure bypass heating system, the utility model discloses following beneficial effect has at least:

the utility model discloses a high pressure bypass heating system sets up the backpressure machine, and the backpressure machine leads to main steam, and the flow of main steam drives the backpressure machine and operates, and the backpressure machine is with compressor coaxial coupling, and the compressor compresses the air, and in the compression process, air temperature risees, and high temperature air lets in first heat exchanger, obtains low temperature high-pressure air and heating medium through the heat transfer; when the unit needs electric energy, low-temperature high-pressure air and a heating medium are introduced into the second heat exchanger to obtain high-temperature high-pressure air and a cooling medium, the high-temperature high-pressure air is introduced into the expander to drive the expander to operate, the expander drives the first generator to generate electricity, and the electric energy is input into the unit; the steam energy is fully utilized for storing energy, reducing energy waste, improving the energy utilization rate and being used for quick load increase of the unit.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of a high-pressure bypass heating system with coupled compressed air energy storage according to an embodiment of the present invention.

Reference numerals are as follows:

1. a back press; 2. a gas compressor; 3. a first heat exchanger; 4. an air storage chamber; 5. a second heat exchanger; 6. an expander; 7. a first generator; 8. a reheater; 9. heating the tank; 10. cooling the tank; 11. a heat supply steam header; 12. a temperature and pressure reducer; 13. a first transformer; 14. a second transformer; 15. a second generator; 16. a low pressure cylinder; 17. an intermediate pressure cylinder; 18. a high pressure cylinder; 19. a condenser.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1, a preferred embodiment of the present invention provides a high-pressure bypass heating system with coupled compressed air energy storage, which includes a back-pressing machine 1, a compressor 2, a first heat exchanger 3, a gas storage chamber 4, a second heat exchanger 5, an expander 6, a first generator 7, a unit, a hot tank 9 and a cold tank 10, wherein the back-pressing machine 1 is connected with external main steam; the compressor 2 is coaxially connected with the back press 1; the first heat exchanger 3 is connected with the compressor 2; the air storage chamber 4 is connected with the first heat exchanger 3; the second heat exchanger 5 is connected with the air storage chamber 4; the expander 6 is connected with the second heat exchanger 5; the first generator 7 is coaxially connected with the expander 6; the unit is connected with the generator; the hot tank 9 is used for storing heating media, and the hot tank 9 is respectively connected with the first heat exchanger 3 and the second heat exchanger 5; the cold tank 10 is used for storing a cooling medium, and the cold tank 10 is respectively connected with the first heat exchanger 3 and the second heat exchanger 5.

The use process of the high-pressure bypass heating system comprises the following steps:

energy storage process: when the bypass heating system is put into operation, main steam is pumped out through a high-pressure bypass and enters a backpressure machine 1 to do work, a rotating shaft of the backpressure machine 1 is directly connected with a rotating shaft of a compressor 2 of a compressed air energy storage system, the compressor 2 is driven to suck air and then compress the air into high-pressure air, the air temperature is increased in the compression process, and the air is changed into low-temperature high-pressure air through a first heat exchanger 3 and then enters an air storage chamber 4 to be stored; the cooling medium flows out from the low-temperature heat storage tank 9, and after the heat of the high-temperature air is absorbed by the first heat exchanger 3, the cooling medium becomes a heating medium and enters the high-temperature heat storage tank 9.

The energy release process is as follows: the low-temperature high-pressure air from the air storage chamber 4 firstly enters the second heat exchanger 5, absorbs the heat of the heating medium and then enters the turbine of the expansion machine 6 for expansion and work, and the heating medium is cooled to form a cooling medium and is merged into the low-temperature heat storage tank 9; the rotating shaft of the expansion machine 6 is connected with the rotating shaft of the first generator 7, the generated electric energy can be output in two paths, one path is connected to the first transformer 13 for high-voltage service, and the other path is connected to the second transformer 14.

In some preferred embodiments of the present invention, the high-pressure bypass heating system further comprises a reheater 8 and a heating steam header 11, which are connected in sequence; the reheater 8 is connected to the back press 1. In this way, the exhaust steam of the back pressure machine 1 enters the reheater 8, and then the steam is heated in the reheater 8 to become hot reheat steam, and then is extracted from the hot reheat pipeline to enter the heat supply steam header 11 for external heat supply.

In some preferred embodiments of the present invention, the high pressure bypass heating system further comprises a temperature and pressure reducer 12, and the temperature and pressure reducer 12 is connected to the heating steam header 11. Thus, the temperature and pressure reducer 12 can output steam meeting the heat parameter requirements of the user.

In some preferred embodiments of the present invention, the unit comprises a first transformer 13 and a second transformer 14, the first transformer 13 and the second transformer 14 being connected to the first generator 7 respectively.

In some preferred embodiments of the present invention, the power generating unit further includes a second power generator 15, a low-pressure cylinder 16, an intermediate-pressure cylinder 17 and a high-pressure cylinder 18, which are connected in sequence, and the second power generator 15 is connected with the first transformer 13 and the second transformer 14 respectively.

In some preferred embodiments of the present invention, the unit further includes a condenser 19, and the condenser 19 is connected to the low pressure cylinder 16.

The utility model discloses preferred embodiment provides a high-pressure bypass heating system of coupling compressed air energy storage, and it compares with prior art:

the utility model discloses a high pressure bypass heating system sets up back press 1, and back press 1 lets in main steam, and the flow of main steam has driven back press 1 to operate, and back press 1 is with compressor 2 coaxial coupling, and compressor 2 compresses the air, and in the compression process, air temperature rose, and high temperature air lets in first heat exchanger 3, obtains low temperature highly-compressed air and heating medium through the heat transfer; when the unit needs electric energy, low-temperature high-pressure air and a heating medium are introduced into the second heat exchanger 5 to obtain high-temperature high-pressure air and a cooling medium, the high-temperature high-pressure air is introduced into the expander 6 to drive the expander 6 to operate, the expander 6 drives the first generator 7 to generate electricity, and the electric energy is input into the unit; the steam energy is fully utilized for storing energy, reducing energy waste, improving the energy utilization rate and being used for quick load increase of the unit.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A high pressure bypass heating system of coupling compressed air energy storage, its characterized in that includes:

a back press (1), the back press (1) being connected to an external main steam;

the air compressor (2), the air compressor (2) is coaxially connected with the back press (1);

the first heat exchanger (3), the first heat exchanger (3) is connected with the compressor (2);

the air storage chamber (4), the air storage chamber (4) is connected with the first heat exchanger (3);

the second heat exchanger (5), the second heat exchanger (5) is connected with the air storage chamber (4);

an expander (6), wherein the expander (6) is connected with the second heat exchanger (5);

a first generator (7), the first generator (7) being coaxially connected with the expander (6);

the unit is connected with the generator;

a hot tank (9), wherein the hot tank (9) is used for storing a heating medium, and the hot tank (9) is respectively connected with the first heat exchanger (3) and the second heat exchanger (5);

the cooling tank (10), the cooling tank (10) is used for storing cooling medium, the cooling tank (10) respectively with first heat exchanger (3) with second heat exchanger (5) are connected.

2. A high pressure bypass heating system coupling compressed air energy storage according to claim 1, wherein: the high-pressure bypass heating system also comprises a reheater (8) and a heating steam header (11) which are sequentially connected; the reheater (8) is connected to the back press (1).

3. A high pressure bypass heating system coupling compressed air energy storage according to claim 2, wherein: the high-pressure bypass heating system further comprises a temperature and pressure reducer (12), and the temperature and pressure reducer (12) is connected with the heating steam header (11).

4. The compressed air energy storage coupled high pressure bypass heating system of claim 1, wherein: the unit comprises a first transformer (13) and a second transformer (14), wherein the first transformer (13) and the second transformer (14) are respectively connected with the first generator (7).

5. The high pressure bypass heating system coupled with compressed air energy storage of claim 4, wherein: the unit further comprises a second generator (15), a low-pressure cylinder (16), a medium-pressure cylinder (17) and a high-pressure cylinder (18), wherein the second generator (15) is connected with the first transformer (13) and the second transformer (14) respectively.

6. The compressed air energy storage coupled high pressure bypass heating system of claim 5, wherein: the unit also comprises a condenser (19), and the condenser (19) is connected with the low-pressure cylinder (16).