CN219328328U - Industrial ash waste heat utilization heat exchanger - Google Patents

Industrial ash waste heat utilization heat exchanger Download PDF

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Publication number
CN219328328U
CN219328328U CN202320266507.6U CN202320266507U CN219328328U CN 219328328 U CN219328328 U CN 219328328U CN 202320266507 U CN202320266507 U CN 202320266507U CN 219328328 U CN219328328 U CN 219328328U
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heat exchange
heat
bin
communicated
exchange module
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蒋受宝
周国章
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HUNAN SIWEI ENERGY ENVIRONMENT ENGINEERING CO LTD
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HUNAN SIWEI ENERGY ENVIRONMENT ENGINEERING CO LTD
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Abstract

The utility model discloses an industrial ash waste heat utilization heat exchanger, which comprises a heat exchanger body arranged on a bracket, wherein the heat exchanger body comprises a storage bin assembly, a heat exchange area and a discharging assembly which are sequentially distributed from top to bottom and are mutually communicated; the heat exchange area comprises a plurality of heat exchange modules, the inner cavities of the adjacent heat exchange modules are mutually communicated, and vibration devices are arranged on the heat exchange modules. The utility model can realize intensified heat exchange, has compact structure, is easy to popularize and implement, saves energy and reduces emission, and can effectively recover heat.

Description

Industrial ash waste heat utilization heat exchanger
Technical Field
The utility model belongs to the technical field of ash residue waste heat utilization in industrial production, and particularly relates to an industrial ash residue waste heat utilization heat exchanger.
Background
At present, two magnesium smelting process technologies exist, namely magnesium electrolysis smelting process technology and silicon thermal reduction process technology. In the silicon thermal reduction process, magnesium slag (components such as calcium silicate, magnesium oxide, ferric oxide and the like) from the reduction tank still has high temperature, the highest temperature is up to 1200 ℃, and the practical available temperature can be up to 800 ℃. At present, the heat is not fully and reasonably utilized, a large amount of heat resources are wasted, and the environment is polluted.
In general, the existing ash waste heat utilization has the following problems: first, the cooling heat of ash is emitted to the atmosphere and is not utilized, so that a great amount of heat resources are wasted, and the environment is polluted; secondly, the problem of fluidity of ash residues on heat exchange surfaces is not solved well, and a material accumulation and flowing dead zone exists; thirdly, the problem of effective heat exchange between ash and a heat exchange surface is generally not well solved, and the heat exchange efficiency is low; fourth, the heat exchanger discharge hopper generally is square cone or conical structure, and the inhomogeneous discharge often takes place when this kind of discharging device, and the dead angle appears easily in the toper four corners or keeps away from the discharge gate position, and unable control ejection of compact rate.
In order to solve the technical problems, the Chinese patent No. 209672349U discloses a waste heat recovery device for waste ash, which comprises a cooling tank filled with cooling water, wherein the upper end of the cooling tank is provided with a feed inlet, and the waste heat recovery device also comprises a plurality of mutually parallel partition boards which are arranged in the cooling tank along the front and rear directions and are fixed with the front side wall and the rear side wall of the cooling tank, the partition boards are not connected with the bottom wall of the cooling tank, the cooling tank is divided into a plurality of cavities with mutually independent upper parts by the partition boards, and the lower parts of the cavities are communicated with the space between the bottom wall of the cooling tank by the partition boards; and heat exchange water pipes are arranged in the side wall, the bottom wall and the partition boards of the cooling tank, and circulating cold water is circulated in the heat exchange water pipes.
For another example, chinese patent No. CN211651341U discloses a device for recycling waste heat of ash, the device for recycling waste heat of ash includes a housing, an inner cavity of the housing is rotatably connected with a first rotating shaft and a second rotating shaft, an outer side wall of the first rotating shaft is fixedly provided with a driving roller, an outer side wall of the second rotating shaft is fixedly provided with a driven roller, outer side walls of the first rotating shaft and the second rotating shaft are sleeved with a conveyor belt, an outer side wall of the housing is fixedly provided with a motor, an output end of the motor is fixedly connected with the first rotating shaft, and the inner cavity of the housing is fixedly connected with a heat exchange device through a connecting component. The conveyer belt can transport the lime-ash, and at the in-process of transportation conveying, can exchange the heat through heat transfer device's heat exchange tube, drive the rolling disc through first pivot and rotate, make the fixed block extrude the trigger piece to make the body frame carry out intermittent type formula and control and remove, thereby make the heat transfer tube in the body frame fully receive the heat from conveyer belt surface lime-ash.
Both the prior art solves the technical problems that the cooling heat of ash is emitted to the atmosphere and is not utilized, a great amount of heat resources are wasted and the environment is polluted. However, the problem of fluidity of ash between heat exchange surfaces, the problem of effective heat exchange between ash and heat exchange surfaces, the problem of uniform discharge of heat exchangers, and the like are not mentioned or have not been solved well.
Disclosure of Invention
The utility model aims to solve the technical problem of overcoming the defects of the prior art, and provides the industrial ash waste heat utilization heat exchanger which has the advantages of compact structure, easy popularization and implementation, energy conservation and emission reduction and can effectively perform heat recovery.
In order to achieve the above purpose, the specific technical scheme of the utility model is as follows:
the heat exchanger comprises a heat exchanger body arranged on a bracket, wherein the heat exchanger body comprises a stock bin assembly, a heat exchange area and a discharging assembly which are sequentially distributed from top to bottom and are mutually communicated;
the heat exchange area comprises a plurality of heat exchange modules, the inner cavities of the adjacent heat exchange modules are mutually communicated, and vibration devices are arranged on the heat exchange modules.
From this, take high temperature lime-ash to get into the heat transfer area from feed bin subassembly to carry out the heat transfer with the heat transfer pipe in the heat transfer module inner chamber, make full use of the cooling heat of lime-ash, set up a plurality of heat transfer modules and can improve the heat exchange efficiency between lime-ash and the heat transfer face, ensure through vibrating device that the lime-ash has good mobility between the heat transfer face.
Further, the plurality of heat exchange modules comprise a first heat exchange module and a second heat exchange module, the first heat exchange module is communicated with the discharging assembly, the second heat exchange module is communicated with the storage bin assembly, the first heat exchange module is a water preheating heat exchange surface, and the second heat exchange module is an evaporation heat exchange surface.
Further, the plurality of heat exchange modules comprise a first heat exchange module, a second heat exchange module and a third heat exchange module, wherein the first heat exchange module is communicated with the discharging assembly, the third heat exchange module is communicated with the storage bin assembly, the first heat exchange module is a water preheating heat exchange surface, the second heat exchange module is an evaporation heat exchange surface, and the third heat exchange module is an overheating heat exchange surface.
Still further, the feed bin subassembly is including setting up the feed bin on upper portion, setting up the lower feed bin in the lower part, the feed bin is linked together with the feed bin down, the feed bin down with heat transfer district intercommunication, be equipped with breaker between feed bin and the feed bin down, install water cooling system on the breaker.
Still further, the discharging component comprises a discharging channel and a discharging bin, the upper end of the discharging channel is communicated with the heat exchange area, the lower end of the discharging channel is communicated with the discharging bin, and a discharging device for adjusting the inner diameter of the channel is arranged in the discharging channel.
Still further still, still include control system, be used for gathering ash flow rate's sensor, the sensor sets up on the feed bin subassembly, the output of sensor is connected with control system electricity, discharge apparatus and vibrating device respectively with control system's output electricity is connected.
Furthermore, the heat exchange tubes are arranged in staggered arrangement in the inner cavity of the heat exchange module, and the cross sections of the tube rows of the heat exchange tubes are arranged in an equilateral triangle.
Furthermore, the heat exchange tube is a nonstandard independent fin heat exchange tube, a plurality of independent fins are arranged on the heat exchange tube, the fins are uniformly distributed along the length direction of the heat exchange tube, and the fins are independent annular or H-shaped.
The utility model has the following advantages:
1) The ash heat exchange surface is made of nonstandard independent fin heat exchange tubes which are made of seamless steel tubes and welded with annular independent fins or H-shaped independent fins, solid particles can flow downwards freely through gaps between the heat exchange tubes, and fully contact with the heat exchange surface of the heat exchange tubes, so that the influence of other cooler adopting a spiral or spiral fin structure on the flow cross section of solid particle materials due to heat is thoroughly solved, the heat exchange area is expanded, the heat transfer is enhanced, and the ash flow area is not influenced.
2) The heat exchange surfaces are arranged in staggered mode, the cross sections of the tube rows are arranged in an approximately equilateral triangle mode, and the heat exchange surfaces can be used for disturbing and dispersing ash particles and enhancing heat exchange.
3) And each heat exchange module is provided with a vibration device which can push gravity flow of ash slag and strengthen global gravity flow heat transfer between the ash slag and the heat exchange pipes.
4) The ash is immersed in the heat exchange surface by controlling the discharging speed of the discharging device at the outlet of the heat exchanger, and free flow is realized under the action of gravity, so that the ash can fully contact and exchange heat in the heat exchange surface.
5) The technology of the utility model has simple and convenient operation, can realize automatic control and has extremely simple maintenance.
6) The utility model can realize ash gravity flow without external force, realize intensified heat exchange, has compact structure, is easy to popularize and implement, saves energy and reduces emission, can effectively recycle heat, reduces the production cost of enterprises and improves the economic benefit of the enterprises.
Drawings
FIG. 1 is a schematic diagram of an industrial ash waste heat utilization heat exchanger structure of the utility model;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic view of an H-shaped fin structure of the present utility model;
fig. 4 is a schematic view of the structure of the annular fin of the present utility model.
The figure indicates: 1. a storage bin; 2. a crushing device; 3. discharging the material bin; 4. a first heat exchange module; 5. a second heat exchange module; 6. a third heat exchange module; 7. a discharging device; 8. discharging the material bin; 9. a bracket; 10. a vibration device; 11. a sensor; 12. a heat exchanger body; 13. a bin assembly; 14. a heat exchange area; 15. a discharge assembly; 16. a heat exchange tube; 17. a fin; 21. a water inlet; 22. and a water outlet.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings for a better understanding of the objects, structures and functions of the present utility model.
As shown in fig. 1 and 2, an industrial ash waste heat utilization heat exchanger of the present utility model comprises a heat exchanger body 12 provided on a bracket 9, the bracket 9 preferably being a steel bracket. The heat exchanger body 12 comprises a bin assembly 13, a heat exchange area 14 and a discharging assembly 15 which are sequentially distributed from top to bottom and are mutually communicated, the bin assembly 13, the heat exchange area 14 and the discharging assembly 15 are all supported on the support 9, and a closed welding structure is adopted among the bin assembly 13, the heat exchange area 14 and the discharging assembly 15, so that the heat exchanger is free from ash leakage and environment-friendly in working.
The feed bin assembly 13 comprises a feed bin 1 arranged at the upper part and a lower feed bin 3 arranged at the lower part, wherein the feed bin 1 is communicated with the lower feed bin 3, and the lower feed bin 3 is communicated with the heat exchange area 14. When in use, ash enters the discharging bin 3 from the bin 1 and then enters the heat exchanging area 14. Preferably, a crushing device 2 is arranged between the bin 1 and the discharging bin 3, and the roller of the crushing device 2 crushes the ash slag with large grain diameter entering the discharging bin 3 into ash slag with small grain diameter of which the grain diameter is less than or equal to 5mm, so that the ash slag is fully contacted with the heat exchange surface of the heat exchange area 14, and the heat exchange is enhanced. The crushing device 2 is provided with a water cooling system. The cooling system is provided with a water inlet 21 and a water outlet 22, the water inlet 21 is connected with system water supply, the water outlet 22 is connected with a deaerator or a water tank of the system, and the cooling system is used for cooling the roller of the crushing device 2 so that the crushing device works stably at a proper temperature.
The heat exchange area 14 comprises a plurality of heat exchange modules, the adjacent heat exchange modules are connected with each other through a shell 15, the inner cavities of the adjacent heat exchange modules are communicated with each other, heat exchange pipes 16 are uniformly distributed in the inner cavities of the heat exchange modules, the heat exchange modules adopt a header type multi-pipe-row compact structure, and the shell 15 of the heat exchange modules is provided with vibration devices 10. The vibration device 10 can push gravity flow of ash slag by real-time on-line vibration, and intensify global gravity flow heat transfer between the ash slag and the heat exchange tube. The heat exchange tubes 16 are arranged in staggered arrangement in the inner cavity of the heat exchange module, and the cross sections of the tube rows of the heat exchange tubes 16 are arranged in an equilateral triangle, so that the dispersed ash can be disturbed, and the heat exchange of the heat exchange surface is enhanced. The heat exchange tube 16 is a nonstandard independent fin heat exchange tube, as shown in fig. 3 and 4, a plurality of independent fins 17 are arranged on the heat exchange tube 16, the fins 17 are uniformly distributed along the length direction of the heat exchange tube 16, and the fins 17 are all independent annular or H-shaped. The heat exchange tube 16 of the embodiment thoroughly solves the influence of other heat exchange surfaces of the heat exchangers adopting the spiral or spiral fin structures on the ash flow cross section, expands the heat exchange area, strengthens the heat transfer, and does not influence the ash flow area.
As a first embodiment of the present utility model, the plurality of heat exchange modules includes a first heat exchange module 4 and a second heat exchange module 5, where the first heat exchange module 4 is communicated with the discharging component 15, the second heat exchange module 5 is communicated with the bin component 13, the first heat exchange module 4 is a water preheating heat exchange surface, and the second heat exchange module 5 is an evaporation heat exchange surface.
As shown in fig. 1 and fig. 2, as a second embodiment of the present utility model, the plurality of heat exchange modules includes a first heat exchange module 4, a second heat exchange module 5, and a third heat exchange module 6, where the first heat exchange module 4 is communicated with the discharging component 15, the third heat exchange module 6 is communicated with the bin component 13, the first heat exchange module 4 is a water preheating heat exchange surface, the second heat exchange module 5 is an evaporation heat exchange surface, and the third heat exchange module 6 is an overheating heat exchange surface. The overheat heat exchange surface is used for producing overheat steam with certain pressure. The evaporation heat exchange surface is used for producing saturated steam under a certain pressure. The heat exchange surface of the water preheater is used for heating the inlet water of the heat exchanger.
According to practical needs, the third heat exchange module 6 can adopt one or more groups, and the first heat exchange module 4 and the second heat exchange module 5 can be arranged into two or more groups or are changed into other structures for enhancing heat exchange.
In another embodiment, the third heat exchange module 6 can also be set as an evaporation heat exchange surface according to the quality of the process production steam, so that the ash residue heat utilization heat exchanger can be used for producing saturated steam required by the process production.
The discharging assembly 15 comprises a discharging channel and a discharging bin 8, the upper end of the discharging channel is communicated with the heat exchange area 14, the lower end of the discharging channel is communicated with the discharging bin 8, and a discharging device 7 for adjusting the inner diameter of the channel is arranged in the discharging channel. When in use, the ash slag after heat exchange enters the discharging channel from the heat exchange area 14 and is discharged from the outlet of the discharging bin 8.
The discharging device 7 comprises a material distribution plate, a material level control plate, an adjustable supporting device and a transmission mechanism, and the material distribution plate is connected with the outlet of the heat exchange module. The material distribution plate is provided with a plurality of first discharge holes and a guide plate. The material level control plate is arranged below the material distribution plate and is provided with a plurality of second discharging holes. The material level control plate is connected with the transmission mechanism and moves horizontally along with the transmission mechanism. The adjustable supporting device is arranged below the material level control plate, and the top of the adjustable supporting device is abutted against the bottom of the material level control plate. The transmission mechanism can enable the material level control plate to horizontally move, and control the size of a discharge channel formed by the second discharge hole and the first discharge hole, so that the discharge rate of ash is controlled. The cross section of the whole discharging channel is adjusted by adjusting the dislocation between the material distribution plate and the material level control plate, so that the discharging rate of solid particle materials is controlled, and the discharging amount of ash slag can be adjusted.
The heat exchanger body 12 is further provided with a control system, the control system comprises a high material level sensor 11 and a low material level sensor 11 which are arranged on the discharging bin 3, the output end of the sensor 11 is electrically connected with the control system, and the discharging device 7 and the vibrating device 10 are electrically connected with the control system. Specifically, the control system can control the rotating speeds of the motors of the vibrating device 10 and the discharging device 7 according to the sampling information, so that real-time online work is realized, and smooth gravity flow of ash is ensured when the ash is immersed in the heat exchange tube.
It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (8)

1. The industrial ash waste heat utilization heat exchanger is characterized by comprising a heat exchanger body (12) arranged on a bracket (9), wherein the heat exchanger body (12) comprises a bin assembly (13), a heat exchange area (14) and a discharging assembly (15) which are sequentially distributed from top to bottom and are mutually communicated;
the heat exchange area (14) comprises a plurality of heat exchange modules, the inner cavities of the adjacent heat exchange modules are communicated with each other, and the heat exchange modules are provided with vibration devices (10).
2. The industrial ash waste heat utilization heat exchanger according to claim 1, characterized in that a plurality of the heat exchange modules comprise a first heat exchange module (4) and a second heat exchange module (5), the first heat exchange module (4) is communicated with a discharging assembly (15), the second heat exchange module (5) is communicated with a bin assembly (13), the first heat exchange module (4) is a water preheating heat exchange surface, and the second heat exchange module (5) is an evaporation heat exchange surface.
3. The industrial ash waste heat utilization heat exchanger according to claim 1, characterized in that a plurality of heat exchange modules comprise a first heat exchange module (4), a second heat exchange module (5) and a third heat exchange module (6), wherein the first heat exchange module (4) is communicated with a discharging assembly (15), the third heat exchange module (6) is communicated with a bin assembly (13), the first heat exchange module (4) is a water preheating heat exchange surface, the second heat exchange module (5) is an evaporation heat exchange surface, and the third heat exchange module (6) is a overheating heat exchange surface.
4. The industrial ash waste heat utilization heat exchanger according to any one of claims 1 to 3, characterized in that the bin assembly (13) comprises a bin (1) arranged at the upper part and a lower bin (3) arranged at the lower part, the bin (1) is communicated with the lower bin (3), the lower bin (3) is communicated with the heat exchange area (14), a crushing device (2) is arranged between the bin (1) and the lower bin (3), and a water cooling system is arranged on the crushing device (2).
5. An industrial ash waste heat utilization heat exchanger according to any one of claims 1-3, characterized in that the discharge assembly (15) comprises a discharge channel and a discharge bin (8), the upper end of the discharge channel is communicated with the heat exchange area (14), the lower end of the discharge channel is communicated with the discharge bin (8), and a discharge device (7) for adjusting the inner diameter of the channel is arranged in the discharge channel.
6. The industrial ash waste heat utilization heat exchanger according to claim 5, further comprising a control system, a sensor (11) for collecting ash flow rate, the sensor (11) being arranged on a silo assembly (13), the output end of the sensor (11) being electrically connected to the control system, and the discharging device (7) and the vibrating device (10) being electrically connected to the output end of the control system, respectively.
7. The industrial ash waste heat utilization heat exchanger according to any one of claims 1 to 3, characterized in that the inner cavity of the heat exchange module is provided with heat exchange tubes (16) arranged in staggered manner, and the tube row cross section of the heat exchange tubes (16) is arranged in an equilateral triangle.
8. The industrial ash waste heat utilization heat exchanger according to claim 7, characterized in that the heat exchange tube (16) is provided with a plurality of independent fins (17), the fins (17) are uniformly distributed along the length direction of the heat exchange tube (16), and the fins (17) are in an independent annular shape or an H shape.
CN202320266507.6U 2023-02-21 2023-02-21 Industrial ash waste heat utilization heat exchanger Active CN219328328U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320266507.6U CN219328328U (en) 2023-02-21 2023-02-21 Industrial ash waste heat utilization heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320266507.6U CN219328328U (en) 2023-02-21 2023-02-21 Industrial ash waste heat utilization heat exchanger

Publications (1)

Publication Number Publication Date
CN219328328U true CN219328328U (en) 2023-07-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320266507.6U Active CN219328328U (en) 2023-02-21 2023-02-21 Industrial ash waste heat utilization heat exchanger

Country Status (1)

Country Link
CN (1) CN219328328U (en)

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