CN217402525U

CN217402525U - Peak-regulating heat storage system for thermal power generation

Info

Publication number: CN217402525U
Application number: CN202222138982.3U
Authority: CN
Inventors: 穆丽宁; 张加权
Original assignee: Hangzhou Shengqian Energy Co ltd
Current assignee: Hangzhou Shengqian Energy Co ltd
Priority date: 2022-08-15
Filing date: 2022-08-15
Publication date: 2022-09-09
Anticipated expiration: 2032-08-15

Abstract

The utility model discloses a be used for thermal power peak shaving heat-retaining system, include: a boiler; a particulate heat sink disposed within the boiler; the outlet of the particle heat absorption device is communicated with the inlet of the impurity separation device; the outlet of the impurity separation device is communicated with the inlet of the high-temperature storage tank; the outlet of the high-temperature storage tank is communicated with the inlet of the particle heat exchanger; and the outlet of the particle heat exchanger is communicated with the inlet of the low-temperature storage tank, and the outlet of the low-temperature storage tank is communicated with the inlet of the particle heat absorbing device. The utility model provides a be used for thermal power peak shaving heat-retaining system, this system can promote thermal generator set peak shaving ability with simple effectual structure, realizes heat-retaining technique and thermal generator set's coupling.

Description

Peak-regulating heat storage system for thermal power generation

Technical Field

The utility model belongs to the technical field of thermal power factory peak shaving heat-retaining, specifically speaking relates to a be used for thermal power peak shaving heat-retaining system.

Background

In the prior art, thermal power generation is still the main power generation form at present, but a thermal power generating set is changed into double guarantees of electric power and electric quantity from the original electric quantity guarantee, and the low-load operation and deep peak regulation of the thermal power generating set become normal states gradually due to the large-scale development of new energy. However, low-load operation affects the service life of equipment such as boilers, steam turbines and auxiliary machines and the operation safety of the equipment, aggravates thermal stress and vibration of the equipment, and causes problems of coal blockage, ash blockage, equipment corrosion and the like. Therefore, the method is an effective way for solving the contradiction between thermal power generation and renewable energy development through the flexible modification of the thermal generator set. Can combine heat-retaining technique and thermal generator set, store the heat of fuel burning through the heat-retaining material to promote thermal generator set peak regulation ability.

Therefore, how to provide a simple and effective system to realize the coupling of the heat storage technology and the thermal generator set for storing heat energy and improve the peak regulation capacity of the thermal generator set is a current problem.

In view of this, the present invention is provided.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in overcoming the not enough of prior art, provides one kind and is used for thermal power peak shaving heat-retaining system, and this system can promote thermal generator set peak shaving ability with simple effectual structure, realizes heat-retaining technique and thermal generator set's coupling.

In order to solve the technical problem, the utility model adopts the following basic concept:

a peak shaving thermal storage system for thermal power generation, comprising:

a boiler;

a particulate heat sink disposed within the boiler;

the outlet of the particle heat absorption device is communicated with the inlet of the impurity separation device;

the outlet of the impurity separation device is communicated with the inlet of the high-temperature storage tank;

the outlet of the high-temperature storage tank is communicated with the inlet of the particle heat exchanger;

and the outlet of the particle heat exchanger is communicated with the inlet of the low-temperature storage tank, and the outlet of the low-temperature storage tank is communicated with the inlet of the particle heat absorbing device.

Further, the particle heat absorption device comprises a particle conveying device, and an outlet of the low-temperature storage tank is communicated with an inlet of the particle heat absorption device through the particle conveying device.

In some optional embodiments, the particle heat absorber includes a hollow cube surrounded by a bottom plate, a front plate, a rear plate, a left plate, a right plate, and a top plate, the top plate is a porous plate or a metal mesh, the inlet of the particle heat absorber is disposed on the left plate, and the outlet of the particle heat absorber is disposed on the right plate.

Further, the bottom plate is a porous plate or a metal net, the front side plate is a porous plate or a metal net, and the rear side plate is a porous plate or a metal net.

In some alternative embodiments, the particulate heat sink is a pipe, and the pipe is a porous plate or is surrounded by a metal mesh.

In some optional embodiments, the impurity separating device includes a support plate, a first support spring, a second support spring, an electromagnet, a control unit, a porous inclined plate, and an impurity receiver, wherein the first support spring, the electromagnet, and the second support spring are sequentially disposed on the support plate, the porous inclined plate is disposed on the first support spring and the second support spring, the impurity receiver is disposed under the porous inclined plate, and the control unit is in control connection with the electromagnet.

In some optional embodiments, further comprising:

the outlet of the particle heat absorption device is communicated with the inlet of the impurity separation device through the first flow control device;

the outlet of the impurity separation device is communicated with the inlet of the high-temperature storage tank through the second flow control device;

the outlet of the high-temperature storage tank is communicated with the inlet of the particle heat exchanger through the third flow control device;

a fourth flow control device through which the outlet of the cryogenic storage tank communicates with the particulate delivery device.

Further:

the first flow control device comprises a first temperature sensor, a first flow controller and a first flow regulating valve which are connected in sequence;

the second flow control device comprises a second temperature sensor, a second flow controller and a second flow regulating valve which are connected in sequence;

the third flow control device comprises a third temperature sensor, a third flow controller and a third flow regulating valve which are connected in sequence;

the fourth flow control device comprises a fourth temperature sensor, a fourth flow controller and a fourth flow regulating valve which are connected in sequence.

In some alternative embodiments, the particulate heat sink may be disposed in a furnace of the boiler, or in a horizontal flue of the boiler, or in a back flue of the boiler.

In some optional embodiments, the high temperature storage tank further comprises an outward output valve port.

After the technical scheme is adopted, compared with the prior art, the utility model following beneficial effect has.

The utility model provides a pair of be used for thermal power peak regulation heat-retaining system, the granule is through setting up the granule heat absorbing device in the boiler, and the granule can directly absorb the inside flue gas heat energy of boiler, realizes flue gas heat energy to granule heat energy or the conversion of chemical energy, can realize heat absorption volume control based on granule flow regulation and control, promotes the inside peak regulation ability of thermal generator set. The high-temperature particles separate ash from slag in the impurity separation device, the ash flows into the high-temperature storage tank and the particle heat exchanger in sequence to realize external heat supply, and the low-temperature particles after heat exchange flow through the low-temperature storage tank and then enter the particle heat absorption device to be recycled.

Therefore, the utility model provides a pair of be used for thermal power peak shaving heat-retaining system can promote thermal generator set peak shaving ability with simple effectual structure, realizes heat-retaining technique and thermal generator set's coupling to can outwards export the heat.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments and that for a person skilled in the art, other drawings can also be derived from them without inventive effort. In the drawings:

fig. 1 is an overall schematic diagram of a peak shaving heat storage system for thermal power generation provided by the present invention;

FIG. 2 is a schematic view of an embodiment of a particulate heat sink apparatus provided by the present invention;

FIG. 3 is a schematic view of another embodiment of a particulate heat sink apparatus according to the present invention;

FIG. 4 is a schematic view of a particulate heat sink according to yet another embodiment of the present invention;

FIG. 5 is a schematic structural view of an impurity separating device provided by the present invention;

fig. 6 is a schematic structural diagram of a first flow control device according to the present invention.

In the figure: 1. a boiler; 2. a particulate heat sink; 3. an impurity separation device; 4. a high-temperature storage tank; 5. a particulate heat exchanger; 6. a low-temperature storage tank; 7. a particle delivery device; 8. a first flow control device; 9. a second flow control device; 10. a third flow rate control device; 11. a fourth flow control device; 12. a steam turbine; 13. an outward output valve port; 14. a hearth; 15. a horizontal flue; 16. a tail flue; 17. a first superheater; 18. a second superheater; 19. a third superheater; 20. a reheater; 21. a coal economizer;

201. a base plate; 202. a front side plate; 203. a rear side plate; 204. a left side plate; 205. a right side plate; 206. a top plate; 207. a pipeline;

301. a porous sloping plate; 302. an impurity receiver; 303. a first support spring; 304. a second support spring; 305. a support plate; 306. a control unit; 307. an electromagnet;

801. a first temperature sensor; 802. a first flow controller; 803. a first flow regulating valve.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 6, the utility model provides a be used for thermal power peak shaving heat-retaining system, this system includes:

a boiler 1;

the particle heat absorption device 2 is arranged in the boiler 1;

the outlet of the particle heat absorbing device 2 is communicated with the inlet of the impurity separating device 3;

the outlet of the impurity separation device 3 is communicated with the inlet of the high-temperature storage tank 4;

the outlet of the high-temperature storage tank 4 is communicated with the inlet of the particle heat exchanger 5;

and the outlet of the low-temperature storage tank 6 is communicated with the inlet of the low-temperature storage tank 6, and the outlet of the low-temperature storage tank 6 is communicated with the inlet of the particle heat absorbing device 2.

Specifically, granule gets into granule heat sink 2 from the import of granule heat sink 2, and granule heat sink 2 sets up in boiler 1, and the heat energy of the inside flue gas of boiler 1 and the granule in the granule heat sink 2 carry out the heat transfer, and granule heat sink 2 can prevent that the granule from revealing or being blown away by high-speed flue gas. The particles can directly absorb the heat energy of the flue gas in the boiler 1, so that the conversion of the heat energy of the flue gas into the heat energy of the particles or chemical energy is realized, the temperature of the particles is continuously increased, and the boiler 1 can also maintain stable operation under low-load operation.

The high-temperature particles enter the impurity separation device 3 from the outlet of the particle heat absorption device 2 and then enter the impurity separation device 3 through the inlet of the impurity separation device 3, and the impurity separation device 3 is used for separating the high-temperature particles from ash residues, so that the particles have better heat absorption characteristics and can continuously and stably absorb heat for a long time.

The high-temperature particles separated from the ash slag enter the high-temperature storage tank 4 from the outlet of the impurity separation device 3 and the inlet of the high-temperature storage tank 4, and the high-temperature storage tank 4 is used for storing the high-temperature particles after the ash slag is separated.

When the power consumption peak is reached, the high-temperature particles can be used for heating working media inside the thermal generator set.

The high-temperature particles in the high-temperature storage tank 4 enter the particle heat exchanger 5 from the outlet of the high-temperature storage tank 4 and then pass through the inlet of the particle heat exchanger 5, and the high-temperature particles exchange heat with the subsequent working medium in the particle heat exchanger 5. Optionally, the high-temperature particles heat the working medium in the tube bundle in the particle heat exchanger 5, and the working medium can be steam, bypass feed water, bypass condensate, steam extraction or steam condensation as required.

The low-temperature particles after heat exchange enter the low-temperature storage tank 6 from the outlet of the particle heat exchanger 5 through the inlet of the low-temperature storage tank 6, and the low-temperature storage tank 6 is used for receiving and storing the low-temperature particles.

Optionally, the cryogenic tank 6 is provided with a particle feed to replenish particles lost during operation.

According to the heat condition in the boiler 1, the low-temperature particles stored in the low-temperature storage tank 6 can be selectively led into the particle heat absorption device 2 from the outlet of the low-temperature storage tank 6 and then through the inlet of the particle heat absorption device 2, so that a cycle is completed. The particles repeat this cycle continuously during continuous operation of the system, absorbing heat, storing heat, and releasing heat.

The utility model provides a pair of be used for thermal power peak regulation heat-retaining system, granule are through setting up granule heat absorbing device 2 in boiler 1, and the granule can directly absorb 1 inside flue gas heat energy of boiler, realizes flue gas heat energy to granule heat energy or the conversion of chemical energy, can realize heat absorption volume control based on granule flow regulation and control, promotes the inside peak regulation ability of thermal generator set. The high-temperature particles are separated from ash residues in the impurity separation device 3, the ash residues sequentially flow into the high-temperature storage tank 4 and the particle heat exchanger 5 to realize external heat supply, and the low-temperature particles after heat exchange flow through the low-temperature storage tank 6 and then enter the particle heat absorption device 2 to be circulated again.

Therefore, the utility model provides a pair of a be used for thermal power peak regulation heat-retaining system can promote thermal generator set peak regulation ability with simple effectual structure, realizes heat-retaining technique and thermal generator set's coupling.

Further, the utility model provides a be used for thermal power peak regulation heat-retaining system, this system still includes granule conveyor 7, and granule conveyor 7 and the import intercommunication of granule heat sink 2 are passed through in the export of low temperature storage tank 6.

The particle conveying device 7 is used for conveying the low-temperature particles stored in the low-temperature storage tank 6 to the inlet of the particle heat absorbing device 2, the outlet of the low-temperature storage tank 6 is communicated with the inlet of the particle conveying device 7, and the outlet of the particle conveying device 7 is communicated with the inlet of the particle heat absorbing device 2.

Alternatively, the particle conveying device 7 may be a particle elevator, and after the particles enter the particle elevator from the outlet of the low-temperature storage tank 6, the particles are scooped out by a bucket in the particle elevator rotating along with a chain, and then lifted to the high position of the particle elevator, and poured into the inlet of the particle heat absorber 2.

In some optional embodiments, as shown in fig. 1 to 6, the present invention provides a peak shaving heat storage system for thermal power generation, the particle heat absorber 2 of the system comprises a hollow cube surrounded by a bottom plate 201, a front side plate 202, a rear side plate 203, a left side plate 204, a right side plate 205, and a top plate 206, the top plate 206 is a porous plate or a metal mesh, an inlet of the particle heat absorber 2 is disposed on the left side plate 204, and an outlet of the particle heat absorber 2 is disposed on the right side plate 205.

The particle heat absorber device 2 is arranged in the boiler 1 in an inclined or vertical way, and the outlet of the particle heat absorber device 2 is lower than the inlet of the particle heat absorber device 2. The particles may flow under the force of gravity from the inlet of the particle heat sink 2, along the base plate 201 to the outlet of the particle heat sink 2.

The particles absorb the heat of the flue gas and store the heat in the flowing process of the particles in the particle heat absorber 2, the temperature of the particles gradually rises to generate a reduction reaction, and the flue gas released by the reduction reaction leaves the particle heat absorber 2 through the holes on the top plate 206 and enters the hearth 14, so that the sufficient fuel is facilitated. The flue gas of boiler 1 can follow the hole on roof 206 and pass in and out at will, has effectively increased the heat exchange area of flue gas and granule, the heating granule that can be more abundant.

Further, the bottom plate 201 is a porous plate or a metal mesh, the front side plate 202 is a porous plate or a metal mesh, and the rear side plate 203 is a porous plate or a metal mesh.

Specifically, in the present embodiment, the bottom plate 201, the front side plate 202, the rear side plate 203, and the top plate 206 are all porous plates or metal meshes, the inlet of the particle heat absorber 2 is disposed on the left side plate 204, and the outlet of the particle heat absorber 2 is disposed on the right side plate 205.

The particles flow along the bottom plate 201 with holes under the action of gravity, and the flue gas can freely enter and exit from the holes of the bottom plate 201, the front side plate 202, the rear side plate 203 and the top plate 206, so that the heat exchange area between the flue gas and the particles is effectively increased, and the particles can be more fully heated. The particle heat absorber 2 can be smaller in size and has better economical efficiency under the same heat absorption capacity requirement.

In some alternative embodiments, as shown in fig. 1 to 6, the present invention provides a peak shaving heat storage system for thermal power generation, wherein the particle heat absorber 2 of the system is a pipe 207, and the pipe 207 is a porous plate or is surrounded by a metal mesh.

The particles flow along the conduit 207 within the conduit 207 and the flue gas may optionally enter and exit the conduit 207 through holes in the side wall to exchange heat with the particles. The pipe diameter of the pipeline 207 can be flexibly adjusted as required, so that the requirements of more types of space arrangement are met.

Optionally, the tubes 207 are used in combination to form a tube bank to increase heat exchange area. The pipe 207 structure has higher flexibility, and can use the arrangement requirement under more scenes.

Optionally, the structure of the pipeline 207 may be a straight pipe structure, or may be a bent pipe structure.

The material of the bottom plate 201, the front plate 202, the rear plate 203, the left plate 204, the right plate 205, the top plate 206, and the duct 207 may be nichrome, or high temperature ceramic, or cordierite, or corundum, or other high temperature resistant materials.

The diameters of the holes are smaller than the diameters of the particles, so that the particles are prevented from leaking or being blown away by high-speed smoke.

Alternatively, the particulate heat absorber means 2 with the above three structural forms may be used singly, or optionally in combination of two or three, so as to achieve the optimal peak-shaving effect.

In some alternative embodiments, as shown in fig. 1 to 6, the present invention provides a peak shaving heat storage system for thermal power generation, the particulate heat absorbing device 2 can be disposed in the furnace 14 of the boiler 1, or the horizontal flue 15 of the boiler 1, or the tail flue 16 of the boiler 1.

Specifically, the particle heat absorbing device 2 may be disposed in a furnace 14 of the boiler 1, a horizontal flue 15 of the boiler 1, or a tail flue 16 of the boiler 1.

Two particle heat absorbing devices 2 can be optionally arranged at two selected positions, and the particle heat absorbing devices 2 can be arranged at three positions of a hearth 14 of the boiler 1, a horizontal flue 15 of the boiler 1 and a tail flue 16 of the boiler 1 so as to obtain the optimal peak regulation effect.

In some optional embodiments, as shown in fig. 1 to 6, the utility model provides a peak shaving heat storage system for thermal power generation, this system impurity separation device 3 includes a supporting plate 305, a first supporting spring 303, a second supporting spring 304, an electromagnet 307, a control unit 306, a porous sloping plate 301, an impurity receiver 302, the first supporting spring 303, the electromagnet 307, the second supporting spring 304 set gradually on the supporting plate 305, the porous sloping plate 301 sets up on the first supporting spring 303 and the second supporting spring 304, the impurity receiver 302 sets up below the porous sloping plate 301, the control unit 306 is connected with the electromagnet 307 control.

The particles and ash entering the impurity separation device 3 flow on the porous inclined plate 301, the control unit 306 controls the on-off frequency of the current in the electromagnet 307, and the first support spring 303 and the second support spring 304 are matched to enable the upper porous inclined plate 301 to vibrate, so that the vibration frequency of the porous inclined plate 301 is adjusted, at the moment, the ash impurities pass through the holes in the porous inclined plate 301 to enter the lower impurity receiver 302, the particles flow out of the outlet of the impurity separation device 3 along the porous inclined plate 301 under the combined action of vibration and gravity, the separated ash impurities enter the impurity receiver 302 to be collected, and the separation of the particles and the ash impurities is achieved.

It should be noted that the aperture of the open pore of the porous sloping plate 301 should be larger than the ash particle diameter and smaller than the particle diameter.

In some alternative embodiments, as shown in fig. 1 to 6, the present invention provides a peak shaving thermal storage system for thermal power generation, the system further comprising:

the outlet of the particle heat absorbing device 2 is communicated with the inlet of the impurity separation device 3 through the first flow control device 8;

the outlet of the impurity separation device 3 is communicated with the inlet of the high-temperature storage tank 4 through the second flow control device 9;

the outlet of the high-temperature storage tank 4 is communicated with the inlet of the particle heat exchanger 5 through the third flow control device 10;

a fourth flow control device 11, the outlet of the cryogenic tank 6 being in communication with the particle delivery device 7 via the fourth flow control device 11.

The first flow control means 8 may control the flow of particles from the particle heat sink 2 to the impurity separation means 3.

The second flow control device 9 can control the flow of particles from the impurity separation device 3 to the high temperature storage tank 4.

The third flow control means 10 can control the flow of particles from the high temperature storage tank 4 to the particle heat exchanger 5.

The fourth flow control means 11 may control the flow of particles from the cryogenic tank 6 to the particle transport means 7.

Specifically, the method comprises the following steps:

the first flow control device 8 comprises a first temperature sensor 801, a first flow controller 802 and a first flow regulating valve 803 which are connected in sequence;

the second flow control device 9 comprises a second temperature sensor, a second flow controller and a second flow regulating valve which are connected in sequence;

the third flow control device 10 includes a third temperature sensor, a third flow controller, and a third flow regulating valve, which are connected in sequence.

The fourth flow control device 11 includes a fourth temperature sensor, a fourth flow controller, and a fourth flow control valve, which are connected in sequence.

In detail, taking the first flow control device 8 as an example, along the particle flow direction, the first temperature sensor 801 measures the particle temperature of at least one measuring point in the upstream particle heat absorber 2 connected to the first flow control device 8, and when the measured temperature is too high or the heat of the flue gas needs to be quickly exchanged by the particles, the first flow controller 802 controls the first flow control valve 803 to increase the opening degree, so as to increase the particle flow rate, thereby achieving the effect of reducing the temperature or quickly exchanging the heat of the flue gas, and otherwise, the opening degree is decreased.

The first flow controller 802 collects temperature data measured by the first temperature sensor 801 and sends an opening signal to the first flow regulating valve 803.

Alternatively, the first flow controller 802 may be manually controlled to control the first flow regulating valve 803 to adjust the opening.

The second flow control device 9, the third flow control device 10 and the fourth flow control device 11 have the same operation principle as the first flow control device 8, and are not repeated here.

In some alternative embodiments, as shown in fig. 1 to 6, the present invention provides a peak shaving heat storage system for thermal power generation, wherein the high temperature storage tank 4 further comprises an outward output valve port 13.

The high-temperature particles in the high-temperature storage tank 4 are output outwards through the outward output valve port 13, and the high-temperature particles can be used as a heat source to directly supply heat outwards.

In some alternative embodiments, as shown in fig. 1-6, the present invention provides a peak shaving thermal storage system for thermal power generation, the particle types provided by the present invention include inert particles and thermochemical particles.

The particles with heat energy stored only in the form of sensible heat are called inert particles, and the heat energy of the flue gas is converted into the heat energy of the inert particles for storage. The inert particles can be ceramic particles, alumina particles, silicon carbide particles, quartz sand, desert sand, river sand, ceramsite sand, black copper slag and the like.

Particles in which thermal energy is stored in sensible and chemical thermal forms are referred to as thermochemical particles. The heat energy of the flue gas is converted into the heat energy and the chemical energy of the thermochemical particles for storage. The thermochemical particles can perform reversible reaction within a certain temperature range so as to absorb or release heat energy, have the advantages of high energy storage density, good circulation stability and the like, and are favorable for maintaining the relatively constant temperature of a heated area so as to protect system equipment.

The thermochemical particles can be metal oxide particles, the main reactant is a metal oxide material or metal carbonate particles, the main reactant is a metal carbonate material or metal sulfate particles, the main reactant is a metal sulfate material or metal hydroxide particles, the main reactant is a metal hydroxide material or perovskite particles, and the main reactant is a perovskite material.

Optionally, the metal oxide particles absorb heat energy of air in the hearth 14 and simultaneously undergo oxidation-reduction reaction to release oxygen, so that an oxygen-rich atmosphere is formed, and fuel combustion in the hearth 14 is promoted.

Specifically, the metal oxide particles may be pure metal oxide particles or composite metal oxide particles.

Wherein the pure metal oxide particles can be cobalt oxide particles, copper oxide particles, manganese oxide particles and the like.

The composite metal oxide particles can be iron-manganese composite oxide particles, copper-aluminum composite oxide particles, copper-manganese composite oxide particles and the like.

It should be noted that the inert particles and the thermochemical particles can be used singly or in combination of at least two of them to obtain the optimum heat absorption effect.

In some optional embodiments, as shown in fig. 1 to 6, the present invention provides a peak shaving heat storage system for thermal power generation, and the particle heat exchanger 5 provided by the present invention can be a moving bed heat exchanger or a fluidized bed heat exchanger.

In some optional embodiments, as shown in fig. 1 to 6, the utility model provides a be used for thermal power peak shaving heat-retaining system, the utility model provides a granule conveyor 7 is the granule lifting machine, and the granule lifting machine adopts the bucket elevator, and the bucket elevator passes through the motor and drives the chain rotation, and the bucket on the chain ladles out the granule in the low place, later pours out at the eminence, has better promotion effect, and the velocity of flow of being convenient for is regulated and control. Although the present embodiment employs a bucket elevator as the particle elevator, it is not limited thereto, and it is obvious that a skilled person can select another particle elevator having a particle elevating function according to actual use requirements.

It should be noted that the above components are communicated with each other through pipelines for the particles to be transported and flowed between the components.

The following explains one embodiment, and as shown in fig. 1 to 6, the present invention provides a peak shaving heat storage system for thermal power generation.

As shown in fig. 1, the boiler 1 is divided into three regions including a furnace 14 of the boiler 1, a horizontal flue 15 of the boiler 1, and a tail flue 16 of the boiler 1, and three particulate heat absorbers 2 are provided, and the particulate heat absorbers 2 are provided at three positions of the furnace 14 of the boiler 1, the horizontal flue 15 of the boiler 1, and the tail flue 16 of the boiler 1, so as to obtain the best peak shaving effect.

Specifically, a particulate heat sink 2 can be disposed in the furnace 14 of the boiler 1.

A first superheater 17, a second superheater 18 and a third superheater 19 are arranged in sequence along the flow direction of flue gas discharged from the horizontal flue 15 of the boiler 1, and a particle heat absorption device 2 can be arranged between the second superheater 18 and the third superheater 19.

A reheater 20 and an economizer 21 are provided in this order along the flow direction of exhaust gas from the back flue 16 of the boiler 1. A particle heat sink 2 may be provided in front of the reheater 20.

The particulate heat absorber 2 is disposed in the furnace 14 of the boiler 1, and the particulate heat absorber 2 may be any one of the three structural forms shown in fig. 2 to 4, or a combination of any two or more structural forms, and the combination, the spatial arrangement position, the number and the arrangement may be selected according to actual needs.

Particles enter the particle heat sink 2 from the inlet of the particle heat sink 2 and can flow under the force of gravity from the inlet of the particle heat sink 2, along the base 201 to the outlet of the particle heat sink 2. The flue gas can be followed the hole on the granule heat sink 2 and passed in and out at will, and the in-process absorbs the flue gas heat when the granule flows in granule heat sink 2, and the granule exchanges heat with the flue gas in granule heat sink 2, realizes that flue gas heat energy is to granule heat energy conversion, and granule temperature constantly risees to boiler 1 also can maintain steady operation under the low-load operation.

Under the control of the first flow control device 8, the high-temperature particles and impurities enter the impurity separation device 3 from the outlet of the particle heat absorbing device 2 and then pass through the inlet of the impurity separation device 3. Particles and ash entering the impurity separation device 3 flow on the porous inclined plate 301, the control unit 306 controls the on-off frequency of current in the electromagnet 307, and the control unit cooperates with the first supporting spring 303 and the second supporting spring 304 to enable the upper porous inclined plate 301 to vibrate, so that the vibration frequency of the porous inclined plate 301 is adjusted, at the moment, the ash impurities pass through holes in the porous inclined plate 301 and enter the lower impurity receiver 302, the particles flow out of an outlet of the impurity separation device 3 along the porous inclined plate 301 under the combined action of vibration and gravity, and the separated ash impurities enter the impurity receiver 302 to be collected, so that the separation of the particles and the ash impurities is realized. The particles have better heat absorption characteristics and can continuously and stably absorb heat for a long time.

The high-temperature particles separated from the ash and slag enter the high-temperature storage tank 4 from the outlet of the impurity separation device 3 through the inlet of the high-temperature storage tank 4 under the control of the second flow control device 9, and the high-temperature storage tank 4 is used for storing the high-temperature particles after the ash and slag are separated.

Optionally, the high temperature storage tank 4 is provided with an outward outlet valve port 13. The high-temperature particles in the high-temperature storage tank 4 are output outwards through the outward output valve port 13, and the high-temperature particles can be used as a heat source to directly supply heat outwards.

Preferably, the outlet of the high temperature storage tank 4 is communicated with the inlet of the particle heat exchanger 5 through a third flow control device 10. Under the control of the third flow control device 10, the high-temperature particles in the high-temperature storage tank 4 enter the particle heat exchanger 5 from the outlet of the high-temperature storage tank 4 and then pass through the inlet of the particle heat exchanger 5, and the high-temperature particles exchange heat with a subsequent working medium in the particle heat exchanger 5.

For example, the device is used for heating working medium in a thermal generator set. When the power consumption peak is reached, the high-temperature particles are required to be used for heating working media inside the thermal power generator set, and the working media can be steam, bypass water supply, bypass condensate, steam extraction or steam condensation according to requirements. For example for driving a steam turbine 12.

The low-temperature particles after heat exchange enter the low-temperature storage tank 6 from the outlet of the particle heat exchanger 5 and then pass through the inlet of the low-temperature storage tank 6, and the low-temperature storage tank 6 is used for receiving and storing the low-temperature particles.

Optionally, the cryogenic tank 6 is provided with a particle feed port to replenish particles lost during operation.

The outlet of the cryogenic tank 6 is in communication with the particle delivery means 7 via a fourth flow control means 11. According to the heat condition in the boiler 1, under the control of the fourth flow control device 11, the particles enter the particle elevator from the outlet of the low-temperature storage tank 6, are scooped out along with the bucket in the particle elevator rotating along with the chain, are lifted to the high part of the particle elevator, and are poured into the inlet of the particle heat absorbing device 2. This completes a cycle. The particles repeat this cycle continuously during continuous operation of the system, absorbing heat, storing heat, and releasing heat.

It should be noted that the two particulate heat absorbers 2 disposed in the horizontal flue 15 of the boiler 1 and the back flue 16 of the boiler 1 have the same operation flow as the particulate heat absorber 2 disposed in the furnace 14 of the boiler 1 except that the particulate heat absorbers 2 are located in different positions from the particulate heat absorbers 2 disposed in the furnace 14 of the boiler 1, and therefore, the description thereof will not be repeated.

Alternatively, the particle transportation device 7 may transport the low-temperature particles stored in the low-temperature storage tank 6 for the three particle heat absorbers 2 at the three positions at the same time, and outlets of the three particle heat absorbers 2 are all communicated with an inlet of the impurity separation device 3.

Therefore, the utility model provides a pair of be used for thermal power peak regulation heat-retaining system can promote thermal generator set peak regulation ability with simple effectual structure, realizes heat-retaining technique and thermal generator set's coupling to can outwards export the heat.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.

Claims

1. A peak regulation heat storage system for thermal power generation is characterized in that: the method comprises the following steps:

a boiler;

a particulate heat sink disposed within the boiler;

2. The peak shaving thermal storage system for thermal power generation according to claim 1, wherein: the particle heat absorption device is characterized by further comprising a particle conveying device, and an outlet of the low-temperature storage tank is communicated with an inlet of the particle heat absorption device through the particle conveying device.

3. The peak shaving thermal storage system for thermal power generation according to claim 1, wherein: the particle heat absorption device comprises a hollow cube surrounded by a bottom plate, a front side plate, a rear side plate, a left side plate, a right side plate and a top plate, wherein the top plate is a porous plate or a metal net, an inlet of the particle heat absorption device is arranged on the left side plate, and an outlet of the particle heat absorption device is arranged on the right side plate.

4. The peak shaving heat storage system for thermal power generation of claim 3, wherein: the bottom plate is a porous plate or a metal net, the front side plate is a porous plate or a metal net, and the rear side plate is a porous plate or a metal net.

5. The peak shaving thermal storage system for thermal power generation according to claim 1, wherein: the particle heat absorption device is a pipeline which is a porous plate or is formed by enclosing a metal net.

6. The peak shaving thermal storage system for thermal power generation according to claim 1, wherein: impurity separator includes backup pad, first supporting spring, second supporting spring, electro-magnet, the control unit, porous swash plate, impurity receiver, first supporting spring the electro-magnet second supporting spring sets gradually in the backup pad, porous swash plate sets up first supporting spring with on the second supporting spring, the impurity receiver sets up porous swash plate below, the control unit with electro-magnet control connection.

7. The peak shaving thermal storage system for thermal power generation according to claim 2, wherein: further comprising:

8. The peak shaving thermal storage system for thermal power generation according to claim 7, wherein:

9. The peak shaving thermal storage system for thermal power generation according to claim 1, wherein: the particle heat absorbing device can be arranged in a hearth of the boiler, or a horizontal flue of the boiler, or a tail flue of the boiler.

10. The peak shaving thermal storage system for thermal power generation according to claim 1, wherein: the high-temperature storage tank also comprises an outward output valve port.