CN116242180A - Fixed high-temperature solid particle heat exchanger and working method thereof - Google Patents

Fixed high-temperature solid particle heat exchanger and working method thereof Download PDF

Info

Publication number
CN116242180A
CN116242180A CN202310329479.2A CN202310329479A CN116242180A CN 116242180 A CN116242180 A CN 116242180A CN 202310329479 A CN202310329479 A CN 202310329479A CN 116242180 A CN116242180 A CN 116242180A
Authority
CN
China
Prior art keywords
temperature
header
heat exchanger
tube bundle
stage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310329479.2A
Other languages
Chinese (zh)
Inventor
张旭伟
乔永强
张天宇
白文刚
李红智
顾正萌
杨玉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Thermal Power Research Institute Co Ltd
Original Assignee
Xian Thermal Power Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian Thermal Power Research Institute Co Ltd filed Critical Xian Thermal Power Research Institute Co Ltd
Priority to CN202310329479.2A priority Critical patent/CN116242180A/en
Publication of CN116242180A publication Critical patent/CN116242180A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D17/00—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles
    • F28D17/02—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles using rigid bodies, e.g. of porous material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention discloses a fixed high-temperature solid particle heat exchanger and a working method thereof, and belongs to the technical field of solar thermal power generation. The device comprises a high-temperature inlet/low-temperature outlet header, a high-temperature outlet/low-temperature inlet header, a shell, an interlayer header and a plurality of heat insulation plates; the inside of the shell is divided into a plurality of layers of chambers by a plurality of heat insulation plates; each stage of layer chamber comprises a tube bundle upper header, a tube bundle lower header and a plurality of tube bundles, wherein two ends of each tube bundle are respectively communicated with the tube bundle upper header and the tube bundle lower header, and solid particles are filled in the layer chamber; the upper header of the tube bundle of the adjacent layer chamber is communicated with the lower header of the tube bundle through the interlayer header; the high temperature inlet/low temperature outlet header is communicated with the upper end of the tube bundle of the uppermost-stage chamber, and the high temperature outlet/low temperature inlet header is communicated with the lower end of the tube bundle of the lowermost-stage chamber. The invention can improve the safety and stability of the operation of the heat exchanger and reduce the system power consumption of the heat exchanger.

Description

Fixed high-temperature solid particle heat exchanger and working method thereof
Technical Field
The invention belongs to the technical field of solar thermal power generation, and particularly relates to a fixed high-temperature solid particle heat exchanger and a working method thereof.
Background
The solar thermal power generation technology is clean and low in carbon, and can be used as an adjusting power supply with a heat storage system, so that the solar thermal power generation technology is an important way for promoting large-scale consumption of renewable energy sources such as wind power, photovoltaic and the like and low carbonization development in the power industry. The solid particles as a novel heat storage medium of the solar thermal power generation system have the advantages of low price, high heat storage temperature (up to 1000 ℃) and stable performance, can improve the solar thermal power generation efficiency, reduce the power generation cost and have wide application prospect in the field of solar thermal power generation.
However, because the hardness of the solid particles is high, the fluidized solid particles flow through the wall surface of the shell of the heat exchanger to cause great abrasion, and the mass of the solid particles is great, and a large amount of electric energy is consumed to raise the solid particles from the low-level cold tank to the high-level hot tank by using the bucket elevator, so that the system efficiency is reduced. Therefore, how to solve the problems of abrasion, efficiency reduction and the like is a difficult problem faced by the rapid development of a solid particle heat storage mode.
Disclosure of Invention
In order to solve the existing problems, the invention aims to provide a fixed high-temperature solid particle heat exchanger and a working method thereof, which can improve the running safety and stability of the heat exchanger and reduce the system power consumption of the heat exchanger.
The invention is realized by the following technical scheme:
the invention discloses a fixed high-temperature solid particle heat exchanger, which comprises a high-temperature inlet/low-temperature outlet header, a high-temperature outlet/low-temperature inlet header, a shell, an interlayer header and a plurality of heat insulation boards, wherein the heat insulation boards are arranged on the shell;
the inside of the shell is divided into a plurality of layers of chambers by a plurality of heat insulation plates; each stage of layer chamber comprises a tube bundle upper header, a tube bundle lower header and a plurality of tube bundles, wherein two ends of each tube bundle are respectively communicated with the tube bundle upper header and the tube bundle lower header, and solid particles are filled in the layer chamber; the upper header of the tube bundle of the adjacent layer chamber is communicated with the lower header of the tube bundle through the interlayer header; the high temperature inlet/low temperature outlet header is communicated with the upper end of the tube bundle of the uppermost-stage chamber, and the high temperature outlet/low temperature inlet header is communicated with the lower end of the tube bundle of the lowermost-stage chamber.
Preferably, the shell is made of high-temperature resistant materials, and an insulating layer is arranged outside the shell.
Preferably, the cross section of the housing is rounded rectangular.
Preferably, an insulating layer is arranged outside the interlayer header.
Preferably, the grain diameter of the solid particles is less than or equal to 0.5mm, and the solid particles are made of SiO 2 、MgO、Al 2 O 3 Or SiC.
Preferably, the height of each stage of the layer chamber is equal.
Preferably, the spacing between adjacent bundles in the layer chamber is 20-40 mm.
Preferably, in each stage of layer room, a plurality of tube bundles are arranged in parallel to form a first stage of tube panels, and a plurality of stages of tube panels are arranged in parallel.
Further preferably, the spacing of adjacent tube bundles in each stage of tube panels is equal and the spacing of adjacent tube panels is equal.
The working method of the fixed high-temperature solid particle heat exchanger disclosed by the invention comprises the following steps of
When storing heat, high-temperature gas enters from a high-temperature inlet/low-temperature outlet header and flows through a tube bundle in each stage of layer chamber from top to bottom to heat solid particles in each stage of layer chamber; the temperature of the solid particles rises after absorbing heat, and the heat is stored; the high-temperature gas flows out from the high-temperature outlet/low-temperature inlet header after heat release; the high-temperature gas flows, the solid particles are static, the temperature of the high-temperature gas gradually decreases from top to bottom in the fixed high-temperature solid particle heat exchanger after heat release, and the temperature of the solid particles in the layer chamber is distributed in a stepped decreasing way from top to bottom;
when releasing heat, low-temperature gas enters from a high-temperature outlet/low-temperature inlet header, flows through a tube bundle in each stage of layer chamber from bottom to top, and flows out from the high-temperature inlet/low-temperature outlet header after absorbing heat of solid particles; the temperature of the solid particles in each stage of layer chamber is reduced after heat release, and the temperature of the solid particles in the layer chamber is still in stepped reduction distribution from top to bottom.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention discloses a fixed high-temperature solid particle heat exchanger which is divided into a plurality of layers of chambers by heat insulation plates, wherein solid particles with sequentially reduced temperature are respectively stored in each layer from top to bottom of the heat exchanger, dense tube bundles are vertically buried in the solid particles, and fluid flows through the tube bundles to exchange heat with the solid particles. The solid particles rest on each layer, and heat storage and release are achieved through the increase and decrease of temperature. The solid particles of the system are in a static state, so that the abrasion to the wall surface of the heat exchanger can be avoided, the running safety and stability of the heat exchanger are improved, and the service life of the heat exchanger is prolonged; meanwhile, the height position of the solid particles does not need to be changed, so that the problem that extra energy is consumed due to overcoming of gravitational potential energy of the solid particles is avoided, and the power consumption of the heat exchanger system is reduced.
Further, the heat insulation layer is arranged outside the shell, so that heat dissipation can be effectively prevented.
Further, the cross section of the shell is in a round rectangle, so that the tube bundles are convenient to arrange.
Further, the heat insulation layer is arranged outside the interlayer header, so that heat dissipation can be effectively prevented.
Further, the particle size of the solid particles is less than or equal to 0.5mm, so that the solid particles can be ensured to have higher filling degree in the layer chamber, and further, the solid particles can be ensured to have higher energy storage density.
Further, the heights of the layer chambers of each stage are equal, so that the energy stored in the layer chambers of each stage can be ensured to be approximately equal, and further, the temperature change trend of the layer chambers of each stage in the heat exchange process is ensured to be approximately equal.
Further, the spacing between adjacent tube bundles in the layer chamber is 20-40 mm, so that the layer chamber can store more solid particles, and the tube bundles and the solid particles have larger heat transfer area.
The working method of the fixed high-temperature solid particle heat exchanger disclosed by the invention is simple in operation, good in safety and stability, high in energy utilization rate and low in power consumption.
Drawings
FIG. 1 is a schematic view of the overall structure of a stationary high temperature solid particle heat exchanger of the present invention;
FIG. 2 is a schematic view of the internal structure of the stationary high temperature solid particle heat exchanger of the present invention;
FIG. 3 is a schematic view of the tube bundle and header of the stationary high temperature solid particle heat exchanger of the present invention;
fig. 4 is a schematic diagram of the heat storage and release process of the fixed high temperature solid particle heat exchanger of the present invention.
In the figure: 1 is a high-temperature inlet/low-temperature outlet header, 2 is a high-temperature outlet/low-temperature inlet header, 3 is a shell, 4 is an insulating plate, 5 is an interlayer header, 6 is solid particles, 7 is a tube bundle, 8 is a tube bundle upper header, and 9 is a tube bundle lower header.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings and specific examples, which are given by way of illustration of the invention and not by way of limitation:
as shown in fig. 1 to 3, the fixed high-temperature solid particle heat exchanger of the invention comprises a high-temperature inlet/low-temperature outlet header 1, a high-temperature outlet/low-temperature inlet header 2, a shell 3, an interlayer header 5 and a plurality of heat insulation boards 4;
the inside of the shell 3 is divided into a plurality of layers of chambers by a plurality of heat insulation plates 4; each stage of layer chamber comprises a tube bundle upper header 8, a tube bundle lower header 9 and a plurality of tube bundles 7, wherein two ends of the tube bundles 7 are respectively communicated with the tube bundle upper header 8 and the tube bundle lower header 9, solid particles 6 are filled in the layer chamber, and the tube bundles 7 are vertically buried in the solid particles 6; for each stage of layer chamber, two adjacent heat insulation plates 4 and the shell 3 are closed to form a layer chamber; the upper header 8 of the tube bundle of the adjacent layer chamber is communicated with the lower header 9 of the tube bundle through the interlayer header 5; the high temperature inlet/low temperature outlet header 1 is communicated with the upper end of the tube bundle 7 of the uppermost-stage chamber, and the high temperature outlet/low temperature inlet header 2 is communicated with the lower end of the tube bundle 7 of the lowermost-stage chamber.
In a preferred embodiment of the present invention, the casing 3 is made of a high temperature resistant material, and an insulating layer is provided outside the casing 3.
In a preferred embodiment of the invention, the cross section of the housing 3 is rounded rectangular.
In a preferred embodiment of the invention, the interlayer header 5 is provided with an insulation layer outside.
In a preferred embodiment of the invention, the solid particles 6 have a particle size of 0.5mm or less and are made of SiO 2 、MgO、Al 2 O 3 Or SiC.
In a preferred embodiment of the invention, the height of each stage of chambers is equal.
In a preferred embodiment of the invention, the spacing between adjacent bundles 7 in the layer chamber is 20-40 mm.
In a preferred embodiment of the invention, in each stage of the layer chamber, a plurality of tube bundles 7 are arranged in parallel to form a first stage of tube panels, and a plurality of stages of tube panels are arranged side by side in parallel to form a heat exchange core. Preferably the spacing of adjacent tube bundles 7 in each stage of tube panels is equal and the spacing of adjacent tube panels is equal.
The working method of the fixed high-temperature solid particle heat exchanger comprises the following steps:
when in heat storage, high-temperature gas enters from the high-temperature inlet/low-temperature outlet header 1 and flows through the tube bundle 7 in each stage of layer chamber from top to bottom to heat the solid particles 6 in each stage of layer chamber; the temperature of the solid particles 6 rises after absorbing heat, and the heat is stored; the high-temperature gas flows out from the high-temperature outlet/low-temperature inlet header 2 after heat release; the high-temperature gas flows, the solid particles are static, the temperature of the high-temperature gas gradually decreases from top to bottom in the fixed high-temperature solid particle heat exchanger after heat release, and the temperature of the solid particles 6 in the layer chamber is distributed in a stepped manner from top to bottom;
when releasing heat, low-temperature gas enters from the high-temperature outlet/low-temperature inlet header 2, flows through the tube bundles 7 in each stage of layer chamber from bottom to top, absorbs heat of the solid particles 6 and flows out from the high-temperature inlet/low-temperature outlet header 1; the temperature of the solid particles 6 in each stage of the layer chamber is reduced after heat release, and the temperature of the solid particles 6 in the layer chamber is still in stepped reduction distribution from top to bottom.
Referring to fig. 4, a schematic diagram of a heat storage and release process of a fixed high-temperature solid particle heat exchanger according to the present invention is shown, curve a shows a temperature distribution of high-temperature gas in the heat exchanger, curve D shows a temperature distribution of low-temperature gas in the heat exchanger, curve B shows a temperature distribution of solid particles 6 in different layers of the heat exchanger after the heat storage process is completed or before the heat release process is started, curve C shows a temperature distribution of solid particles in different layers of the heat exchanger before the heat storage process is started or after the heat release process is completed, the solid particles 6 are heated by the high-temperature gas during the heat storage process, and the temperature of the solid particles 6 in each layer of the heat storage process is synchronously increased, that is, the temperature of the solid particles 6 is increased from curve C to curve B; the exothermic process is reversed, in that the solid particles 6 are cooled down from curve B to curve C.
The foregoing is merely illustrative embodiments of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention, or equivalent structures or equivalent flow modifications made by the present invention in the description and the accompanying drawings, or direct or indirect application to other related technical fields should be included in the scope of the present invention.

Claims (10)

1. The fixed high-temperature solid particle heat exchanger is characterized by comprising a high-temperature inlet/low-temperature outlet header (1), a high-temperature outlet/low-temperature inlet header (2), a shell (3), an interlayer header (5) and a plurality of heat insulation plates (4);
the inside of the shell (3) is divided into a plurality of layers of chambers by a plurality of heat insulation plates (4); each stage of layer chamber comprises a tube bundle upper header (8), a tube bundle lower header (9) and a plurality of tube bundles (7), wherein two ends of the tube bundles (7) are respectively communicated with the tube bundle upper header (8) and the tube bundle lower header (9), and solid particles (6) are filled in the layer chamber; the upper header (8) of the tube bundle of the adjacent layer chamber is communicated with the lower header (9) of the tube bundle through the interlayer header (5); the high-temperature inlet/low-temperature outlet header (1) is communicated with the upper end of the tube bundle (7) of the uppermost-stage chamber, and the high-temperature outlet/low-temperature inlet header (2) is communicated with the lower end of the tube bundle (7) of the lowermost-stage chamber.
2. The fixed high-temperature solid particle heat exchanger according to claim 1, wherein the shell (3) is made of a high-temperature resistant material, and an insulating layer is arranged outside the shell (3).
3. A stationary high temperature solid particle heat exchanger according to claim 1, characterized in that the cross section of the housing (3) is rounded rectangular.
4. A stationary high temperature solid particle heat exchanger according to claim 1, characterized in that the outer part of the inter-layer header (5) is provided with a heat insulating layer.
5. The fixed high-temperature solid particle heat exchanger as claimed in claim 1, wherein the solid particles (6) have a particle diameter of 0.5mm or less and are made of SiO 2 、MgO、Al 2 O 3 Or SiC.
6. The stationary high temperature solid particle heat exchanger of claim 1 wherein the height of each stage of the layer chamber is equal.
7. A stationary high temperature solid particle heat exchanger according to claim 1, characterized in that the spacing between adjacent tube bundles (7) in the layer chamber is 20-40 mm.
8. A fixed high temperature solid particle heat exchanger according to claim 1, characterized in that in each stage of the layer chamber, several tube bundles (7) are arranged in parallel to form a stage of tube panels, which are arranged in parallel.
9. A stationary high temperature solid particle heat exchanger as claimed in claim 8 wherein the spacing of adjacent tube bundles (7) in each stage of tube panels is equal and the spacing of adjacent tube panels is equal.
10. A method of operating a stationary high temperature solid particle heat exchanger as claimed in claims 1 to 9, comprising:
when in heat storage, high-temperature gas enters from a high-temperature inlet/low-temperature outlet header (1) and flows through a tube bundle (7) in each stage of layer chamber from top to bottom to heat solid particles (6) in each stage of layer chamber; the temperature of the solid particles (6) rises after absorbing heat, and the heat is stored; the high-temperature gas flows out from the high-temperature outlet/low-temperature inlet header (2) after heat release; the high-temperature gas flows, the solid particles are static, the temperature of the high-temperature gas gradually decreases from top to bottom in the fixed high-temperature solid particle heat exchanger after heat release, and the temperature of the solid particles (6) in the layer chamber is distributed in a stepped decreasing manner from top to bottom;
when releasing heat, low-temperature gas enters from the high-temperature outlet/low-temperature inlet header (2), flows through the tube bundles (7) in each stage of layer chamber from bottom to top, absorbs the heat of the solid particles (6) and flows out from the high-temperature inlet/low-temperature outlet header (1); the temperature of the solid particles (6) in each stage of layer chamber is reduced after heat release, and the temperature of the solid particles (6) in the layer chamber is still in stepped reduction distribution from top to bottom.
CN202310329479.2A 2023-03-30 2023-03-30 Fixed high-temperature solid particle heat exchanger and working method thereof Pending CN116242180A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310329479.2A CN116242180A (en) 2023-03-30 2023-03-30 Fixed high-temperature solid particle heat exchanger and working method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310329479.2A CN116242180A (en) 2023-03-30 2023-03-30 Fixed high-temperature solid particle heat exchanger and working method thereof

Publications (1)

Publication Number Publication Date
CN116242180A true CN116242180A (en) 2023-06-09

Family

ID=86631426

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310329479.2A Pending CN116242180A (en) 2023-03-30 2023-03-30 Fixed high-temperature solid particle heat exchanger and working method thereof

Country Status (1)

Country Link
CN (1) CN116242180A (en)

Similar Documents

Publication Publication Date Title
CN104153954B (en) Multi-mode tower type solar energy thermal power generation device
CN105241087B (en) Split type single tank solids bulk bed heat reservoir
CN205039216U (en) Thermal management system of cuboid group battery
CN106839847A (en) Phase-change energy storage device
CN105888996A (en) Multi-mode tower-type solar thermal power generation device
WO2023231300A1 (en) High-temperature heat exchange and heat storage unit, structure, and device
CN113324277A (en) Metal phase transformation heat storage and supply device
CN216054815U (en) Heat storage device for solid oxide fuel cell external heat management system
CN110195885A (en) A kind of novel photovoltaic and photothermal solar utilization and heating system
CN116242180A (en) Fixed high-temperature solid particle heat exchanger and working method thereof
CN106571499A (en) Thermal management system and method of cuboid battery pack
CN110726319A (en) Solid-liquid phase change energy storage device for dispersed filling of molten salt
CN113251464B (en) Inorganic salt phase-change electric heat storage and supply device
CN215288661U (en) Coal gasification burner and gasifier
WO2023284079A1 (en) Honeycomb particle heat exchanger and heat storage power generation system
CN212338901U (en) Vaporization device of liquefied gas storage tank
CN114152130A (en) High-voltage electric heating phase-change heat storage device
CN113295031A (en) Solid-liquid combined cold and heat accumulator and energy storage system
CN112648874A (en) Heat storage and release device based on cascaded phase transition tube bank
CN220366563U (en) Tower type solar rotational flow heat absorber
CN111426218A (en) Supercritical carbon dioxide and solid particle heat exchanger
CN220601801U (en) Oil industry electric heating furnace
CN217785927U (en) Heat storage device under 10kV-110kV environment
CN219017253U (en) Heat pipe type fuel element and reactor core
CN218915404U (en) Solid heat accumulating type electric boiler

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination