CN116379816A - Pseudo-boiling heat-carrying particle supercritical carbon dioxide heat conversion device - Google Patents
Pseudo-boiling heat-carrying particle supercritical carbon dioxide heat conversion device Download PDFInfo
- Publication number
- CN116379816A CN116379816A CN202310399484.0A CN202310399484A CN116379816A CN 116379816 A CN116379816 A CN 116379816A CN 202310399484 A CN202310399484 A CN 202310399484A CN 116379816 A CN116379816 A CN 116379816A
- Authority
- CN
- China
- Prior art keywords
- tube
- heat exchange
- shell
- air
- heat
- 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
Links
- 239000002245 particle Substances 0.000 title claims abstract description 59
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 23
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 23
- 238000009835 boiling Methods 0.000 title claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 22
- 239000007787 solid Substances 0.000 claims description 14
- 239000004576 sand Substances 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000007306 turnover Effects 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims 2
- 238000010248 power generation Methods 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000000670 limiting effect Effects 0.000 description 5
- 238000004134 energy conservation Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 210000003437 trachea Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F28D13/00—Heat-exchange apparatus using a fluidised bed
-
- 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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/01—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using means for separating solid materials from heat-exchange fluids, e.g. filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/007—Auxiliary supports for elements
- F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0229—Double end plates; Single end plates with hollow spaces
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention belongs to the technical field of circulating solar power generation, and particularly relates to a quasi-boiling heat-carrying particle supercritical carbon dioxide heat conversion device. The heat exchange core body is arranged in the shell and is formed by accompanying and winding a heat exchange pipe and a circulating air pipe on a central air duct; the heat exchange tube is connected with the supercritical carbon dioxide circulating device outside the shell, the circulating air tube is connected with the air inlet device outside the shell, wherein the air outlet holes are distributed on the tube wall of the circulating air tube and used for uniformly ventilating the heat exchange core body, the air inlet holes are formed in the tube wall of the central air tube and used for receiving and discharging circulating air blown to the heat exchange space from the air outlet holes. When entering the gap of the heat exchange core body, the heat-carrying particles are acted by gravity and buoyancy at the same time, and form quasi-boiling movement under the action of air flow, so that the heat exchange efficiency with the heat exchange tube is remarkably improved, and meanwhile, the falling speed of the heat-carrying particles is slowed down, and the heat exchange time is prolonged.
Description
Technical Field
The invention belongs to the technical field of circulating solar power generation, and particularly relates to a quasi-boiling heat-carrying particle supercritical carbon dioxide heat conversion device.
Background
At present, the power generation field still mainly uses thermoelectric, relies on fossil fuel and nuclear energy to generate heat, and heats water into steam working medium for pushing a turbine generator, but the thermoelectric conversion efficiency based on the steam Rankine cycle is lower than 40%, the future solar photo-thermal power generation technology adopts supercritical carbon dioxide Brayton cycle to achieve 50% or even higher thermoelectric conversion efficiency, high-temperature sintered particles resistant to 1000 ℃ are used as heat transfer medium, ultra-high temperature solar heat energy is transferred to supercritical carbon dioxide, and high-temperature and high-pressure working medium is generated for power generation. The working medium generating device capable of realizing the heat energy transfer of the high-temperature heat-carrying particles and the supercritical carbon dioxide only discloses and reports a few designs based on the traditional concepts, such as a fluidized bed heat exchanger and a shell-and-tube/plate-shell type moving bed heat exchanger.
The bottom of the heat exchange cavity of the fluidized bed heat exchanger is provided with an air chamber or an air box, through holes and air caps distributed on the plate-type air distributor, fluidized air is provided for the fluidized bed, the temperature of the fluidized air is increased to be high, particle heat can be taken away during discharging, heat loss is caused, and the fluidized air temperature is low, so that the fluidized bed heat exchanger is unfavorable for maintaining the bed temperature, and therefore, inherent defects exist in the design of the fluidized air distribution and the design of a fluidized air source. Because the particles of the whole bed are fluidized by the cold air blown in from the bottom of the bed, the gas entering the bottom of the fluidized bed does not reach the top in the same time to cause the flow velocity on the flow section to be different, the particle flow direction at the edge of the heat exchange cavity is asynchronous with the main flow direction, and the mixed movement of the particles causes the particle carrying airflow to blend everywhere to cause the actual temperature field to deviate from the designed temperature gradient direction, therefore, the fluidized bed heat exchanger has inherent problems in the design of the uniformity of the heat exchange flow field. Because the pneumatic energy consumption required by fluidization is large, the energy consumption is increased again by the large-scale increase of the bed after the device is large, even the bed is too large to be fully fluidized, and heat exchange is uneven, and when the working medium operation temperature and pressure are increased to more efficient supercritical parameters, the high-temperature heating surface heat deviation of the heat exchange tube can cause the reduction of the device performance and reliability, so that the fluidized bed heat exchanger loses the product competitiveness of energy conservation, high efficiency, high reliability and easy maximization.
In the shell-and-tube moving bed heat exchanger, high-temperature particles at the upper part of the heat exchange tube are retained and cool and isolate fresh heat-carrying particles, and even particles cannot be contacted below the heat exchange tube, so that the heat exchange effect is poor, and the total heat transfer coefficient is necessarily low.
The particles in the heat exchange cavity of the plate-shell type moving bed heat exchanger and the heat exchange surface are still in nearly static contact heat conduction type heat exchange, and the gap between the heat exchange plate surfaces is reduced compared with the shell-type moving bed heat exchanger, but the particle layer close to the heat exchange plate surfaces still has heat transfer resistance which prevents the heat conduction type heat exchange, so that the moving bed heat exchanger has inherent defects in the design of the motion state of the heat-carrying particles, the uneven distribution of channel particles among the plates is unfavorable for heat transfer, and the inherent defects are also caused in the plate type reliability, and the plate type reliability can be reduced and overlapped to reduce the distortion of the plates, but the pipelines are numerous and the connecting pipes are extremely complex, and the maximization is difficult to realize, so that the product loses the competitiveness of energy conservation, high efficiency, high reliability and easy maximization.
Because the device for transferring heat-carrying particles and supercritical carbon dioxide heat energy is essentially a generating device of a power generation turbine working medium, in order to achieve the aim of 50% of light-heat conversion efficiency and even higher, the device needs to be matched with different power generation turbines and is compatible with different flow requirements of supercritical carbon dioxide Brayton cycle, obviously, along with the continuous improvement of the technological process of a light-heat power generation system, the device needs to add or change a technological interface and a functional module of a corresponding structure for newly added materials at any time, and the design of the existing devices is difficult to adapt to the requirements. Therefore, the design of the heat-carrying particle supercritical carbon dioxide working medium generating device needs to be innovated so as to have the competitive advantages of energy conservation, high efficiency, high reliability, easy enlargement, modularization, high compatibility and the like.
Disclosure of Invention
In order to solve the technical problems, the application provides a sand bath type solid particle heat exchanger.
The invention adopts the following technical scheme:
the utility model provides a heat carrier particle supercritical carbon dioxide heat conversion device of quasi-boiling state, includes casing, shell side import, shell side export and heat exchange part, and shell side import and shell side export set up respectively in the upper and lower end of casing and are used for carrying heat particle business turn over casing, and the casing is inside to have the heat transfer space that holds heat exchange part, heat exchange part is by heat exchange tube and circulation trachea accompaniment winding on central dryer forms the heat exchange core, the outer supercritical carbon dioxide circulating device of heat exchange tube connection casing forms first tube side, the outer air inlet unit of circulation trachea connection casing forms the second tube side, first tube side and second tube side separate heat transfer; the wall of the circulating air pipe is distributed with air outlet holes, one end of the upper central air cylinder is fixedly connected with the shell to form a shell side air outlet, and the wall of the central air cylinder is provided with air outlet holes for receiving circulating air blown to the heat exchange space from the air outlet holes of the circulating air pipe.
Preferably, the heat exchange core body is formed by heat exchange tubes and circulating air tubes in a concomitant winding way, namely the heat exchange tubes and the circulating air tubes are spirally wound upwards along the lower end of the central air tube, and each layer of heat exchange core body consists of the heat exchange tubes and/or the circulating air tubes; and a gap is reserved between each heat exchange tube in the heat exchange core body and the circulating air tube.
Preferably, the winding front ends of the heat exchange tubes are connected in parallel and are connected with a supercritical carbon dioxide circulating device outside the shell through a tube box; the winding tail ends of the heat exchange tubes form a collection and are connected with a tube side-outlet connecting tube arranged on the shell;
the winding tail ends of the circulating air pipes form a collection and are connected with a tube side two outlet connecting tube arranged on the shell; the winding front ends of the circulating air pipes are connected in parallel and are connected with an air inlet device outside the shell through a pipe box.
Preferably, the lower end of the central air duct is open, the upper end of the central air duct is connected with the shell side air outlet through the air outlet pipe, and a particle separator is arranged at the joint of the central air duct and the air outlet pipe.
Preferably, the air hole is formed in a part, wound with the heat exchange core, of the central air duct.
Preferably, a distributing disc is further arranged at the inlet of the shell side in the shell, the distributing disc is umbrella-shaped, the upper surface of the distributing disc is fixedly connected with the periphery of the inlet of the shell side through a connecting piece, a gap is formed between the periphery of the distributing disc and the shell, and the gap is matched with the position of the heat exchange core below the distributing disc.
Preferably, the ratio of the heat exchange tube to the circulating air tube in the heat exchange core is 1:0.5-2, and the diameter of the heat exchange tube is the same as that of the circulating air tube.
Preferably, the tube box is arranged outside the shell and is connected with the shell through the connecting cylinder, a tube plate is further arranged inside the tube box at one side close to the shell, through holes are formed in the tube plate, and each through hole is correspondingly connected with one circulating air tube or one heat exchange tube, so that the circulating air tube or the heat exchange tube can be connected in parallel.
Preferably, the heat exchange tube and the circulating air tube are fixed through a tube clamp and a limiting piece.
Preferably, the shell is cylindrical, a supporting piece is arranged on the outer side of the shell, and a heat exchange core fixing device is further arranged in the shell.
The invention has the beneficial effects that:
1) According to the invention, the circulating air pipes in the second tube pass are kept adjacent to the heat exchange pipes in the first tube pass and are wound in a rising way, each circulating air pipe extends over the through holes, so that the inside of the heat exchange core body can be uniformly ventilated everywhere, and the heat exchange surfaces on all the heat exchange pipes can be in a particle uniform boiling environment created by the circulating air pipes.
2) The heat exchange core body can realize more tube pass modules, and can be expanded to be connected into a plurality of different logistics so as to meet the requirements of different supercritical carbon dioxide circulation thermoelectric conversion processes. Therefore, the device has the characteristics of high reliability, high compatibility, easy enlargement and modularization.
3) The hot air flow is discharged from the through holes of the circulating air pipes in the second tube pass, floating force is generated on high Wen Zaire particles, and the heat-carrying particles are subjected to the action of gravity and floating force at the same time, and fall in a suspension manner when passing through the gaps of the winding tube groups, so that gas-solid two-phase flow in a quasi-boiling state is generated, on one hand, the phenomenon that solid particles are accumulated and blocked during downward movement can be avoided, uniform sedimentation of the particles is facilitated, and on the other hand, the particles can be in dynamic contact with a heat exchange surface and fully exchange heat, so that the device has the advantages of energy conservation, high efficiency, high reliability, high compatibility, easiness in large-scale and modularization.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of an air inlet opening in a center duct;
FIG. 3 is a schematic view of a tube box structure;
FIG. 4 is a schematic view of the heat exchange tube and the circulating air tube being wound around a central air duct in an associated manner;
fig. 5 is a schematic diagram of an air outlet on the circulating air pipe.
The meaning of the reference symbols in the figures is as follows:
10-shell 11-shell side inlet 12-shell side outlet 13-shell side air outlet 20-heat exchange core
21-heat exchange tube 22-tube side-tube box 23-tube side-outlet connecting tube 30-circulating air tube
31-air outlet hole 32-tube side two-tube box 33-tube side two-outlet connecting tube 40-central air duct
41-air inlet hole 42-air outlet pipe 50-particle separator 60-distribution plate 61-connecting piece
71-connecting tube 72-tube plate 721-through hole 80-supporting piece 90-fixing device 91-tube hoop
Detailed Description
The technical scheme of the invention is more specifically described below with reference to the accompanying drawings and the examples:
as shown in fig. 1-5, a supercritical carbon dioxide heat conversion device for heat-carrying particles in a quasi-boiling state comprises a cylindrical shell 10, a shell side inlet 11, a shell side outlet 12 and a heat exchange part, wherein the shell side inlet 11 and the shell side outlet 12 are respectively arranged at the upper end and the lower end of the shell 10 and are used for the heat-carrying particles to enter and exit the shell 10, and a heat exchange space for accommodating the heat exchange part is formed inside the shell 10.
The heat exchange part is a heat exchange core body 20 which is formed by winding the heat exchange tube 21 and the circulating air tube 30 on the central air tube 40 in a concomitant way and is radially arranged along the central air tube 40 and is provided with an inner-outer multi-layer heat exchange structure, the heat exchange tube 21 and the circulating air tube 30 are spirally wound upwards along the lower end of the central air tube 40 in a concomitant way, and each layer of heat exchange core body 20 is composed of the heat exchange tube 21 and/or the circulating air tube 30. The ratio of the heat exchange tube 21 to the circulating air tube 30 in the heat exchange core 20 is 1:0.5-2, or determining specific quantity and proportion according to actual working conditions; the diameters of the heat exchange tubes 21 and the circulating air tube 30 are the same, the heat exchange tubes 21 and the circulating air tube 30 are fixed through the tube clamps 91 and the limiting strips, the limiting strips are used for separating two adjacent layers of heat exchange structures to form gaps, the tube clamps 91 fix the heat exchange tubes 21 on the limiting strips, and gaps are reserved between each heat exchange tube 21 and the circulating air tube 30.
The winding front ends of the heat exchange tubes 21 on the central air duct 40 are connected in parallel and are connected with a supercritical carbon dioxide circulating device outside the shell 10 through a tube side tube box 22, the winding tail ends of the heat exchange tubes 21 on the central air duct 40 form a collection, and the collection is connected with a tube side outlet connecting tube 23 arranged on the shell 10 to form a first tube side for forming supercritical carbon dioxide circulation. The front winding ends of the circulating air pipes 30 on the central air cylinder 40 are connected in parallel, and are connected with an air inlet device outside the shell 10 through a second tube pass box 32, the tail winding ends of the circulating air pipes 30 on the central air cylinder 40 form a collection, the collection is connected with a second tube pass outlet connecting tube 33 arranged on the shell 10, a second tube pass for gas circulation is formed, and the first tube pass and the second tube pass are separated and flow.
Further, the first tube side tube box 22 and the second tube side tube box 32 are both arranged outside the shell 10 and connected with the shell 10 through the connecting tube 71, one side of the first tube side tube box 22 and the second tube side tube box 32, which is close to the shell 10, are closed by the tube plate 72, the tube plate 72 is provided with through holes 721, and each through hole 721 is correspondingly connected with one circulating air tube 30 or one heat exchange tube 21, so that the parallel connection of the circulating air tube 30 or the heat exchange tube 21 is realized. The circulation air pipe 30 or the heat exchange pipe 21 is connected in parallel with the first tube side tube box 22 or the second tube side tube box 32 through the connecting tube 71 and the through hole 721 in sequence.
Further, the wall of the circulating air pipe 30 is distributed over the air outlet hole 31, the part of the wall of the central air duct 40 wound with the heat exchange core 20 is provided with the air inlet hole 41, one end of the central air duct 40 is fixedly connected with the shell 10 to form the shell side air outlet 13 penetrating through the shell 10, and the circulating air blown from the air outlet hole 31 to the heat exchange space is received by the air inlet hole 41 and then discharged from the shell side air outlet 13.
The shell side air outlet 13 is arranged on the side wall of the shell 10, the lower end of the central air duct 40 is open, the upper end of the central air duct 40 is tightly connected with the shell side air outlet 13 through the air outlet pipe 42, the particle separator 50 is arranged at the joint of the central air duct 40 and the air outlet pipe 42, heat-carrying particles brought into the central air duct 40 by circulating air through the air inlet hole 41 are blocked and filtered by the particle separator, and fall to the shell side outlet 12 from the lower end of the central air duct 40 to be uniformly discharged, so that the flow of the circulating air is not influenced; the particle separator may be of the prior art.
The shell side inlet is further provided with a distribution disc 60 in the shell 10, the distribution disc 60 is umbrella-shaped, the upper surface of the distribution disc 60 is fixedly connected with the cross inlet of the shell side inlet 11 on the shell 10 through a connecting piece 61, the connecting piece 61 is a connecting rod, the connecting rod has a certain length and a gap between adjacent connecting rods, then the periphery of the distribution disc 60 and the shell 10 are provided with gaps, and the gaps are matched with the positions of the heat exchange cores 20 below the distribution disc 60 so that heat-carrying particles fall from the gaps and can just fall on the heat exchange tubes of the heat exchange cores for heat exchange.
The support 80 is arranged outside the shell 10, and the heat exchange core fixing device 90 is also arranged inside the shell 10.
When the device works, heat-carrying particles enter the shell 10 from the shell side inlet 11, are sprayed on the umbrella-shaped distribution plate 60, and fall down through gaps around the distribution plate 60 to achieve the purpose of distribution. The heat-carrying particles are uniformly distributed and then shower the surfaces of the heat exchange tube 21 and the circulating air tube 30 which are wound below, and flow downwards from top to bottom along the winding layers of the heat exchange tube 21 and the circulating air tube 30 under the action of gravity.
Supercritical carbon dioxide enters the heat exchange tube 21 from the tube side-tube box 22 and flows spirally from bottom to top along the heat exchange tube 21 in the winding direction of the central air duct 40. Circulating air enters the circulating air pipe 30 from the pipe side two-pipe box 32, flows in a spiral shape from bottom to top along the winding direction of the circulating air pipe 30 in the central air duct 40, the pipe wall of the circulating air pipe 30 is provided with an air outlet hole 31, and part of circulating air flowing in the circulating air pipe 30 can be sprayed out from the air outlet hole 31 to a heat exchange space.
When the heat-carrying particles are showered on the heat exchange tube 21 and the circulating air pipe 30 and fall into the gap between the heat exchange tube 21 and the circulating air pipe 30, the heat-carrying particles are simultaneously acted by circulating air sprayed from the circulating air pipe 30 in multiple directions, the heat-carrying particles are driven to move under the action of air flow to form quasi-boiling motion, heat exchange is carried out with the heat exchange tube 21, and meanwhile, the falling speed of the heat-carrying particles is slowed down, so that the heat exchange time is prolonged.
Because the solid particles always have the general trend of downward movement under the action of gravity, after heat exchange is completed, the solid particles fall out of the heat exchange core 20 and finally flow out of the shell 10 from the shell side outlet 12; the supercritical carbon dioxide in the heat exchange tube 21 absorbs heat from the heat-carrying particles and then flows out of the shell 10 through a tube side-outlet connecting tube 23 for subsequent use; the circulating air flowing from the air outlet hole 31 to the heat exchange space enters the central air duct through the air inlet hole 41 and is discharged through the shell side air outlet 13, and the other part of circulating air continues to flow out through the tube side second outlet connecting pipe 33.
The above embodiments are only for illustrating the technical scheme of the present invention, and are not limiting to the present invention; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a quasi-boiling state carries hot granule supercritical carbon dioxide heat conversion device, includes casing (10), shell side import (11), shell side export (12) and heat transfer portion, and shell side import (11) and shell side export (12) set up respectively in upper and lower extreme of casing (10) and are used for carrying hot granule business turn over casing (10), and the inside heat transfer space that holds heat transfer portion that has of casing (10), its characterized in that: the heat exchange part is a heat exchange core body (20) formed by a heat exchange tube (21) and a circulating air tube (30) which are concomitantly wound on a central air duct (40), the heat exchange tube (21) is connected with a supercritical carbon dioxide circulating device outside a shell (10) to form a first tube pass, the circulating air tube (30) is connected with an air inlet device outside the shell (10) to form a second tube pass, and the first tube pass and the second tube pass are separated and flow; the wall of the circulating air pipe (30) is distributed with air outlet holes (31), one end of the central air cylinder (40) is fixedly connected with the shell (10) to form a shell side air outlet (13) penetrating through the shell (10), and the wall of the central air cylinder (40) is provided with air inlet holes (41) for receiving circulating air blown from the air outlet holes (31) to the heat exchange space.
2. A sand bath type solid particle heat exchanger as claimed in claim 1, wherein the heat exchange core (20) is formed by a multi-layer heat exchange structure which is radially arranged along a central air duct (40) by accompanying winding of a heat exchange tube (21) and a circulating air tube (30), the accompanying winding, namely, the heat exchange tube (21) and the circulating air tube (30), are spirally wound upwards along the lower end of the central air duct (40), and each layer of the heat exchange core (20) is composed of the heat exchange tube (21) and/or the circulating air tube (30); a gap is formed between each heat exchange tube (21) in the heat exchange core body (20) and the circulating air tube (30).
3. A sand bath type solid particle heat exchanger as claimed in claim 2, wherein the winding front ends of the heat exchange tubes (21) are connected in parallel and connected with a supercritical carbon dioxide circulation device outside the shell (10) through a tube side-tube box (22); the winding tail ends of the heat exchange tubes (21) form a collection and are connected with a tube side-outlet connecting tube (23) arranged on the shell (10);
the winding front ends of the circulating air pipes (30) are connected in parallel and are connected with an air inlet device outside the shell (10) through a tube side two-tube box (32); the winding tail ends of the circulating air pipes (30) form a collection and are connected with a tube side two-outlet connecting tube (33) arranged on the shell (10).
4. A sand-bath solid particle heat exchanger as claimed in claim 2, characterized in that the lower end of the central air duct (40) is open, the upper end is connected with the shell side air outlet (13) through the air outlet duct (42), and a particle separator (50) is arranged at the joint of the central air duct (40) and the air outlet duct (42).
5. A sand-bath solid particle heat exchanger as claimed in claim 2, characterized in that the air inlet opening (41) is provided in the part of the central air duct (40) around which the heat exchange core (20) is wound.
6. The sand bath type solid particle heat exchanger as claimed in claim 1, wherein a distribution plate (60) is further arranged at the inlet of the shell side in the shell (10), the distribution plate (60) is umbrella-shaped, the upper surface of the distribution plate (60) is fixedly connected with the periphery of the opening of the shell side inlet (11) on the shell (10) through a connecting piece (61), a gap is formed between the periphery of the distribution plate (60) and the shell (10), and the gap is matched with the position of the heat exchange core (20) below the distribution plate (60).
7. A sand-bath solid particle heat exchanger as claimed in claim 2, characterized in that the ratio of heat exchange tubes (21) to circulation gas tubes (30) in the heat exchange core (20) is 1:0.5-2, and the diameter of the heat exchange tube (21) is the same as that of the circulating air tube (30).
8. A sand-bath type solid particle heat exchanger as claimed in claim 3, characterized in that the first tube side tube box (22) and the second tube side tube box (32) are both arranged outside the shell (10) and are connected with the shell (10) through connecting cylinders (71), and tube plates (72) are arranged inside the first tube side tube box (22) and the second tube side tube box (32) at one side close to the shell (10).
9. A sand bath type solid particle heat exchanger as claimed in claim 8, wherein through holes are formed in the tube plate (72), and each through hole is correspondingly connected with one circulating air pipe (30) or one heat exchange pipe (21) so as to realize parallel connection of the circulating air pipes (30) or the heat exchange pipes (21).
10. A sand-bath solid particle heat exchanger as claimed in any one of claims 1 to 9, characterized in that the housing (10) is cylindrical, a support is provided outside the housing (10), and a heat exchange core fixing means (90) is provided inside the housing (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310399484.0A CN116379816A (en) | 2023-04-11 | 2023-04-11 | Pseudo-boiling heat-carrying particle supercritical carbon dioxide heat conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310399484.0A CN116379816A (en) | 2023-04-11 | 2023-04-11 | Pseudo-boiling heat-carrying particle supercritical carbon dioxide heat conversion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116379816A true CN116379816A (en) | 2023-07-04 |
Family
ID=86963260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310399484.0A Pending CN116379816A (en) | 2023-04-11 | 2023-04-11 | Pseudo-boiling heat-carrying particle supercritical carbon dioxide heat conversion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116379816A (en) |
-
2023
- 2023-04-11 CN CN202310399484.0A patent/CN116379816A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110535052A (en) | Box-type substation convenient for safeguarding | |
| CN103216952A (en) | Internal circulation type solid particle air heat absorber for solar thermal power generation | |
| CN207866055U (en) | A kind of cartridge type fin tube type hot-blast heat exchange device | |
| CN107101187B (en) | Heating system and heating method for supercritical carbon dioxide boiler | |
| CN113958964A (en) | Low-temperature economizer with dynamically adjustable downstream wall temperature of rotary air preheater | |
| CN116379816A (en) | Pseudo-boiling heat-carrying particle supercritical carbon dioxide heat conversion device | |
| WO2023284079A1 (en) | Honeycomb particle heat exchanger and heat storage power generation system | |
| CN109443064A (en) | A kind of solid particulate matter storage thermal, system and method | |
| CN111829197A (en) | Counter-flow type high-temperature particle heat absorber for power generation of tower-type solar power station | |
| CN213778733U (en) | Heat pipe low-temperature economizer | |
| CN112665415B (en) | Sand bath type solid particle heat exchanger | |
| CN113446878A (en) | Cyclone separation type particle heat exchanger and heat storage power generation system | |
| CN102767978A (en) | Air-cooled heat exchange device | |
| CN109140411B (en) | Supercritical circulating fluidized bed boiler furnace with hanging screen and control method thereof | |
| CN208805081U (en) | A kind of heat exchanger of Space Rotating equipment water-cooling | |
| CN113108489A (en) | Particle heat absorber and solar power generation system | |
| CN113719816A (en) | Supercritical carbon dioxide boiler system with multi-flue structure and temperature adjustment function | |
| CN207161158U (en) | Reduced ilmenite particle coupled thermomechanics co-feeding system | |
| CN206670385U (en) | The carbon dioxide energy storage equipment of high temperature heat in a kind of accumulation kiln hood | |
| CN104613745B (en) | Heat exchange device with mixing bins | |
| CN214949869U (en) | Particle heat absorber and solar power generation system | |
| CN210268253U (en) | Device with efficient heat transfer performance | |
| CN112728959B (en) | Power plant air cooling heat exchanger and method based on gas-liquid phase change | |
| CN215337879U (en) | Cyclone separation type particle heat exchanger and heat storage power generation system | |
| CN114941958B (en) | Heat exchange equipment based on fluidized bed and phase change material |
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 |