CN114876600B - Steam energy storage power generation heating system - Google Patents

Steam energy storage power generation heating system Download PDF

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Publication number
CN114876600B
CN114876600B CN202210446728.1A CN202210446728A CN114876600B CN 114876600 B CN114876600 B CN 114876600B CN 202210446728 A CN202210446728 A CN 202210446728A CN 114876600 B CN114876600 B CN 114876600B
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China
Prior art keywords
steam
energy storage
power generation
potential energy
pipe
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CN202210446728.1A
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CN114876600A (en
Inventor
陶昱奇
陶俊霖
陶荣
李明磊
姜建
陶林
杨阳
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Liaoning Huazhong Electric Power Technology Co ltd
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Liaoning Huazhong Electric Power Technology Co ltd
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K17/00Using steam or condensate extracted or exhausted from steam engine plant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K17/00Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/02Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03GSPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G3/00Other motors, e.g. gravity or inertia motors
    • F03G3/087Gravity or weight motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D1/00Steam central heating systems

Abstract

The invention relates to a steam energy storage power generation heating system, wherein the steam storage system comprises a gravitational potential energy storage device, the gravitational potential energy storage device comprises a support column and a potential energy cylinder body, a cylinder body heat preservation layer is arranged on the outer side of the potential energy cylinder body, an energy storage space is arranged in the potential energy cylinder body, a static piston is arranged at the upper end of the support column and is arranged in the energy storage space, the static piston is in sealed sliding fit with the side wall of the energy storage space, an air source pipe is arranged in the support column, a steam inlet end and a steam release end are arranged at the lower end of the support column, the upper end of the air source pipe is communicated with the energy storage space, the lower end of the air source pipe is connected with the steam inlet end and the steam release end, the steam release end is connected with a connecting header pipe, the power generation heating system comprises a generator, a steam power generation driving device and a heat exchanger, the connecting header pipe, the steam power generation driving device and the heat exchanger are sequentially connected in series, and the generator drives power generation through the steam power generation driving device. The invention can adjust the power energy balance of the power plant, and can obtain stable pressure after steam storage.

Description

Steam energy storage power generation heating system
Technical Field
The invention relates to the field of cogeneration, in particular to a steam energy storage power generation heating system.
Background
In the prior art, a power grid must be planned according to the maximum power load, which requires the construction of a power plant and a power transmission system which are required by the maximum peak value of the load power consumption, but simultaneously the problem of overall economic decline of a generator set and the like caused by overlarge system idle capacity in the process of low power consumption is also caused, so that the power balance problem of the power grid is generally solved by the methods of energy storage reservoir fall power generation, storage battery energy storage, compressed air energy storage and the like in the power generation process of the power plant, wherein: 1. the energy storage reservoir head power generation construction cost and the maintenance cost are high, the lifting head power generation conversion consumption is large, and more energy sources (more than 25 percent) can be lost due to water evaporation and other reasons; 2. the storage battery has the highest energy storage construction cost, short service life and high energy conversion consumption; 3. the conventional compressed air energy storage construction cost is high, the safety coefficient is low, the service life is short, and the pressure intensity is from strong to weak when the energy is released, so that the release is unstable.
Disclosure of Invention
The invention aims to provide a steam energy storage power generation heating system, which can store steam into a steam storage system in a night electricity consumption valley period, and the steam in the steam storage system is released to drive a generator to supplement peak electricity consumption and heat in a peak period, so that the power energy balance of a power plant is regulated, and a gravitational potential energy device in the steam storage system can ensure that stable pressure is obtained after the steam is stored.
The aim of the invention is realized by the following technical scheme:
the utility model provides a steam energy storage electricity generation heating system, includes steam storage system and the electricity generation heating system that links to each other through connecting house steward, wherein steam storage system includes gravitational potential energy storage device, gravitational potential energy storage device include support column and slip cover in the potential energy cylinder body of support column upper end, the potential energy cylinder body outside is equipped with the cylinder body heat preservation, the inside energy storage space that is equipped with of potential energy cylinder body, the support column upper end is equipped with the static piston and arranges in the energy storage space, just the static piston with be sealed slip fit between the energy storage space lateral wall, be equipped with the air supply pipe in the support column, the support column lower extreme is equipped with steam entry end and steam release end, air supply pipe upper end pass the static piston and with the energy storage space communicates with each other, the air supply pipe lower extreme with steam entry end and steam release end link to each other, just the steam release end with connecting house steward links to each other, the electricity generation system includes generator, steam formula electricity generation drive arrangement and heat exchanger, wherein connecting house steward, steam formula electricity generation drive arrangement and heat exchanger are established ties in proper order, and the generator passes through steam formula electricity generation drive arrangement electricity generation.
Sealing components are sleeved at the upper end and the lower end of the static piston.
The sealing assembly comprises a sealing flange, a sealing ring and a fixing flange, wherein the fixing flange is fixedly arranged at the end part of the static piston, the sealing flange is connected with the fixing flange through a screw, and the sealing ring is arranged between the fixing flange and the sealing flange.
The lower side of the potential energy cylinder body is provided with a guide pulley which rolls along the outer surface of the support column.
The side wall of the support column is internally provided with a lubrication oil injection pipe, the upper end of the lubrication oil injection pipe extends into the static piston and is communicated with a gap between the static piston and the side wall of the energy storage space, and the lower end of the lubrication oil injection pipe extends to the outside of the lower end of the support column.
The air source pipe, the steam inlet end and the steam release end are connected through a tee joint arranged in the support column.
The steam inlet end and the steam release end are respectively provided with a steam on-off control valve, and a pressure sensor is arranged in the energy storage space.
The connecting main pipe is connected with the steam type power generation driving device through a steam input pipeline, a pipeline control valve is arranged on the steam input pipeline, the heat exchanger comprises a heat exchange box body and a heat exchange pipe arranged in the heat exchange box body, and the steam type power generation driving device is connected with the heat exchange pipe in the heat exchanger through a steam output pipeline.
One end of the heat exchange box body of the heat exchanger is provided with a hot water supply pipe which is connected with the tail end heat unit, the other end of the heat exchange box body is provided with a water return pipe which is connected with the tail end heat unit, and the water return pipe is provided with a circulating pump.
The steam type power generation driving device is a piston type pneumatic motor; and a pressure gauge is arranged on the connecting main pipe.
The invention has the advantages and positive effects that:
1. according to the invention, steam generated by the steam boiler of the power plant is stored in the steam storage system at night low-peak time, and the steam in the steam storage system at peak time is released, so that the generator can be driven to generate electricity to supplement peak electricity, and meanwhile, heat is exchanged through the heat exchanger to realize heating, thereby adjusting the power energy balance of the power plant, improving the efficiency and saving more energy.
2. The steam storage system comprises a plurality of gravitational potential energy storage devices, wherein each gravitational potential energy storage device comprises a potential energy cylinder body with constant gravitational force, and stable pressure can be obtained after steam or compressed air is injected into an energy storage space in the potential energy cylinder body, so that the unstable release condition caused by unstable gas pressure of the existing energy storage structure is avoided.
3. The gravitational potential energy storage device realizes the change of the energy storage space by utilizing the sliding fit of the potential energy cylinder body and the supporting column, has a simple integral structure, can be used in parallel according to the needs, and has large energy storage volume.
4. According to the invention, the heat-insulating layer is arranged on the outer side of the potential energy cylinder body, so that the steam temperature during energy storage can be ensured, and the subsequent use is ensured.
Drawings
Figure 1 is a schematic view of the structure of the present invention,
figure 2 is a schematic diagram of the gravitational potential energy storage device of figure 1,
figure 3 is an enlarged view at a in figure 2,
figure 4 is a schematic view of the seal assembly of figure 3,
figure 5 is an enlarged view at B in figure 2,
figure 6 is a schematic view of the thermal insulation layer structure of the cylinder in figure 2,
figure 7 is a schematic view of the power generation and heating system in figure 1,
fig. 8 is a schematic diagram of another embodiment of the potential energy cylinder of fig. 2.
The gravity potential energy storage device comprises a potential energy cylinder body 1, a cylinder body heat insulation layer 102, a cylinder body cover plate 103, an energy storage space 104, a guide pulley 105, a static piston 106, a support column 107, an air source pipe 108, a tee joint 109, a steam release end 110, a steam inlet end 111, a lubrication oil injection pipe 112, a sealing assembly 113, a sealing flange 1131, a sealing ring 1132, a fixing flange 1133, a screw 1134, a power generation heating system 2, a generator 201, a steam power generation driving device 202, a heat exchanger 203, a steam input pipeline 204, a steam output pipeline 205, a heating pipe 206, a water return pipe 207, a circulating pump 208, a cooling steam pipe 209, a pipeline control valve 211, a pressure gauge 211 and a connecting main pipe 3.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 to 8, the invention comprises a steam storage system and a power generation heating system 2 which are connected through a connecting main pipe 3, wherein the steam storage system comprises a gravitational potential energy storage device 1, as shown in fig. 2 to 6, the gravitational potential energy storage device 1 comprises a fixed supporting column 107 and a potential energy cylinder body 101 which is sleeved at the upper end of the supporting column 107 in a sliding way, a cylinder body heat preservation layer 102 is arranged outside the potential energy cylinder body 101, an energy storage space 104 is arranged in the potential energy cylinder body 101, a static piston 106 is arranged at the upper end of the supporting column 107 and is arranged in the energy storage space 104, the static piston 106 is in sealing sliding fit with the side wall of the energy storage space 104, an air source pipe 108 is arranged in the supporting column 107, the lower end of the supporting column 107 is provided with a steam inlet end 111 and a steam release end 110, the upper end 108 is connected with the steam inlet end 111 and the steam release end 110 of a power plant, the steam release end 110 is connected with the connecting main pipe 3, as shown in fig. 7, the power generator 2, the power generation heating system 203 is driven by a heat exchange device, and the power generation heating device 203 is driven by a heat exchange device in series, and the power generator is driven by a heat exchange device 202, and the power generation device is driven by a heat exchange device 203 in turn, and the power generation device is driven by a power generation device 202 is driven by a driving 202. Except the energy storage space 104, the rest parts of the potential energy cylinder body 101 are all poured into a solid structure, so that the potential energy cylinder body 101 has larger weight and larger gravitational potential energy, and steam or compressed air is injected into the energy storage space 104 through the air source pipe 108 to lift the potential energy cylinder body 101, so that the volume of the energy storage space 104 is increased along with the gas injection, and the steam in the energy storage space 104 can obtain stable pressure due to the constant gravity action of the potential energy cylinder body 101, so that the unstable gas pressure of the existing energy storage structure is avoided. As shown in fig. 2, the lower end of the supporting column 107 may be fixed on the factory building foundation by an anchor bolt.
As shown in fig. 3, the upper and lower ends of the static piston 106 are respectively sleeved with a sealing assembly 113 to ensure sliding sealing between the two, and in this embodiment, as shown in fig. 4, the sealing assemblies 113 include a sealing flange 1131, a sealing ring 1132 and a fixing flange 1133, wherein the fixing flange 1133 is fixedly mounted at the end of the static piston 106, the sealing flange 1131 is connected with the fixing flange 1133 through a screw 1134, and the sealing ring 1132 is disposed between the fixing flange 1133 and the sealing flange 1131 and is fixed by pressing. When the potential energy cylinder 101 and the static piston 106 slide relatively, the sealing ring 1132 ensures that the energy storage space 104 in the potential energy cylinder 101 is in a sealed state.
As shown in fig. 2 to 3, a guide pulley 105 is disposed at the lower side of the potential energy cylinder 101 and rolls along the outer surface of the support column 107 to ensure the lifting guide fit between the guide pulley 105 and the support column 107, and a pulley seat for mounting the guide pulley 105 abuts against a sealing flange 1131 in a sealing assembly 113 at the lower side of the static piston 106 to realize limit, so as to prevent the potential energy cylinder 101 from lifting too high to be separated from the support column 107.
As shown in fig. 2 to 3 and fig. 5, a lubrication oil injection pipe 112 is disposed in the sidewall of the support column 107, and the upper end of the lubrication oil injection pipe 112 extends into the static piston 106 and is communicated with a gap between the static piston 106 and the sidewall of the energy storage space 104, the lower end of the lubrication oil injection pipe 112 extends to the outside of the lower end of the support column 107 and is connected with a lubrication oil pipe, and the lubrication oil injection pipe 112 ensures lubrication between the static piston 106 and the sidewall of the energy storage space 104, so as to ensure smooth lifting of the potential energy cylinder 101.
In this embodiment, as shown in fig. 2, a cylinder cover 103 for closing the energy storage space 104 is disposed at the upper end of the potential energy cylinder 101, and a sealing element (such as a sealing ring, a sealing gasket, etc.) is disposed between the cylinder cover 103 and the potential energy cylinder 101 to ensure sealing, or as shown in fig. 8, in another embodiment, a groove is disposed inside the potential energy cylinder 101 to form the energy storage space 104. The invention can select the corresponding potential energy cylinder body 101 structure according to the actual requirement.
As shown in fig. 2 and fig. 5, the air source pipe 108, the steam inlet end 111 and the steam release end 110 are connected through a tee joint 109 arranged in the support column 107, the steam inlet end 111 and the steam release end 110 are both provided with a steam on-off control valve for controlling the on-off of a pipeline, a pressure sensor is arranged in the energy storage space 104 for detecting the steam pressure in the energy storage space 104 in real time, and when the detected value of the pressure sensor reaches a set value, a control system controls the corresponding steam on-off control valve to be disconnected so as to avoid potential safety hazards caused by overlarge pressure in the energy storage space 104. The steam on-off control valve and the pressure sensor are both well known in the art and commercially available products.
As shown in fig. 6, a cylinder insulation layer 102 is disposed on the outer side of the potential energy cylinder 101 to ensure the steam temperature in the energy storage space 104, in this embodiment, the insulation layer 102 includes high temperature glass wool 1021, aluminum foil glass fiber cloth 1022 and polyurethane foam 1023 which are sequentially wrapped from inside to outside, wherein the polyurethane foam 1023 is fixed with the potential energy cylinder 106 through bolts, and further the fixation of the high temperature glass wool 1021 and the aluminum foil glass fiber cloth 1022 is realized. Polyurethane foam 1023 has good structural strength, heat preservation performance and waterproof performance, and the heat preservation effect is further improved by matching with high-temperature glass wool 1021, and meanwhile, the aluminum foil glass fiber cloth 1022 forms a reflecting layer, so that heat radiation can be well reduced, and the heat preservation performance is improved. When the heat-insulating layer structure is used, the temperature of steam in the potential energy cylinder body 101 can meet the use requirement, and if the temperature of steam in the power plant is 200-300 ℃, the temperature of the steam can still be kept at 150-250 ℃ when the steam is stored in the potential energy cylinder body 101 and reused after 12 hours, so that the subsequent heat exchange requirement can be met.
As shown in fig. 7, the connecting manifold 3 is connected with the steam power generation driving device 202 through a steam input pipeline 204, a pipeline control valve 210 is arranged on the steam input pipeline 204, the pipeline control valve 210 can adopt a manual ball valve or an automatic ball valve and other structures, the steam power generation driving device 202 is connected with a heat exchange pipe in the heat exchanger 203 through a steam output pipeline 205, the output end of the heat exchange pipe is formed into a cooling steam pipe 209 which is connected with subsequent treatment equipment, the cooling steam is treated by the treatment equipment and then discharged into the atmosphere, the environment is not influenced, the environmental protection requirement is met, a heat supply pipe 206 is arranged at one end of a heat exchange box body of the heat exchanger 203 and is connected with a heat unit for the tail end, a return pipe 207 is arranged at the other end of the heat exchange box body, and a circulating pump 208 is arranged on the return pipe 207. In this embodiment, the steam power generation driving device 202 adopts a piston air motor, an output shaft of the piston air motor is connected with an input end of the generator 201 through a sprocket chain assembly, and the steam drives the output shaft of the piston air motor to rotate, so that torque is transmitted through the sprocket chain assembly to drive a rotating shaft of the generator 201 to rotate, thereby realizing power generation operation. The steam power generation drive 202, generator 201, and heat exchanger 203 are all well known in the art.
As shown in fig. 7, the connecting manifold 3 is provided with a pressure gauge 211 for detecting the steam pressure in real time, and the pressure gauge 211 is a commercially available product.
The working principle of the invention is as follows:
as shown in fig. 1, the steam storage system of the present invention includes a plurality of gravitational potential energy storage devices 1 arranged in parallel, an input header pipe connected to a steam pipeline of a power plant is provided on one side of the steam storage system, a connecting header pipe 3 is provided on the other side of the steam storage system, and is connected to the power generation and heating system 2, a steam inlet end 111 in each gravitational potential energy storage device 1 is connected to the input header pipe, a steam outlet end 110 is connected to the connecting header pipe 3, power plant steam enters the gravitational potential energy storage device 1 and enters an energy storage space 104 of a potential energy cylinder 101 to achieve an energy storage effect, and the potential energy cylinder 101 is of a solid structure except the energy storage space 104, so that the potential energy cylinder 101 has a large weight, and has a large gravitational potential energy, and after steam or compressed air is injected into the energy storage space 104 through an air source pipe 108, a stable pressure can be obtained due to the gravitational effect of the potential energy storage cylinder 101, so as to avoid the unstable release of the gas pressure of the existing energy storage structure, and the cylinder 101 is provided with a cylinder insulation layer 102 outside to ensure the energy storage temperature, so as to meet the use requirements of subsequent heat exchange and the like.
According to the invention, steam generated by a steam boiler of a power plant is stored in the gravitational potential energy storage device 1 integrated in parallel at a low-ebb period of night electricity consumption, and the steam release in the gravitational potential energy storage device 1 at a peak period can drive the generator 201 to generate electricity to supplement peak electricity consumption, and heat is exchanged through the heat exchanger 203 to realize heating, so that the power and energy balance of the power plant is regulated, the efficiency is improved, and meanwhile, the energy is saved.

Claims (5)

1. The utility model provides a steam energy storage electricity generation heating system which characterized in that: including steam storage system and electricity generation heating system (2) that link to each other through connecting house steward (3), wherein steam storage system includes gravitational potential energy storage device (1), gravitational potential energy storage device (1) include support column (107) and slip cover in potential energy cylinder body (101) of support column (107) upper end, potential energy cylinder body (101) outside is equipped with cylinder body heat preservation (102), potential energy cylinder body (101) inside is equipped with energy storage space (104), support column (107) upper end is equipped with static piston (106) and arranges in energy storage space (104), just static piston (106) with be sealed sliding fit between energy storage space (104) lateral wall, be equipped with air supply pipe (108) in support column (107), support column (107) lower extreme be equipped with steam inlet end (111) and steam release end (110), air supply pipe (108) upper end pass static piston (106) and with energy storage space (104) communicate with each other, air supply pipe (108) lower extreme with steam inlet end (111) and steam release end (110) link to each other, and steam release end (106) are connected with power generation system (203) and power generation system (203), the connecting header pipe (3), the steam power generation driving device (202) and the heat exchanger (203) are sequentially connected in series, and the generator (201) drives power generation through the steam power generation driving device (202);
sealing assemblies (113) are sleeved at the upper end and the lower end of the static piston (106);
the sealing assembly (113) comprises a sealing flange (1131), a sealing ring (1132) and a fixing flange (1133), wherein the fixing flange (1133) is fixedly arranged at the end part of the static piston (106), the sealing flange (1131) is connected with the fixing flange (1133) through a screw (1134), and the sealing ring (1132) is arranged between the fixing flange (1133) and the sealing flange (1131);
a guide pulley (105) is arranged at the lower side of the potential energy cylinder body (101) and rolls along the outer surface of the supporting column (107);
a lubrication oil injection pipe (112) is arranged in the side wall of the support column (107), the upper end of the lubrication oil injection pipe (112) extends into the static piston (106) and is communicated with a gap between the static piston (106) and the side wall of the energy storage space (104), and the lower end of the lubrication oil injection pipe (112) extends to the outside of the lower end of the support column (107);
the steam inlet end (111) and the steam release end (110) are both provided with steam on-off control valves, and a pressure sensor is arranged in the energy storage space (104).
2. A steam powered generating heating system as recited in claim 1, wherein: the air source pipe (108), the steam inlet end (111) and the steam release end (110) are connected through a tee joint (109) arranged in the support column (107).
3. A steam powered generating heating system as recited in claim 1, wherein: the connecting manifold (3) is connected with the steam power generation driving device (202) through a steam input pipeline (204), a pipeline control valve (210) is arranged on the steam input pipeline (204), the heat exchanger (203) comprises a heat exchange box body and a heat exchange pipe arranged in the heat exchange box body, and the steam power generation driving device (202) is connected with the heat exchange pipe in the heat exchanger (203) through a steam output pipeline (205).
4. A steam powered generating heating system as recited in claim 3, wherein: one end of a heat exchange box body of the heat exchanger (203) is provided with a hot water supply pipe (206) which is connected with a tail end heat unit, the other end of the heat exchange box body is provided with a water return pipe (207) which is connected with the tail end heat unit, and the water return pipe (207) is provided with a circulating pump (208).
5. A steam powered generating heating system as recited in claim 3, wherein: the steam type power generation driving device (202) is a piston type pneumatic motor; and a pressure gauge (211) is arranged on the connecting main pipe (3).
CN202210446728.1A 2022-04-26 2022-04-26 Steam energy storage power generation heating system Active CN114876600B (en)

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