CN108662923B - Device for effectively recovering waste heat of high-temperature wide-screening particle size bulk materials - Google Patents

Device for effectively recovering waste heat of high-temperature wide-screening particle size bulk materials Download PDF

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CN108662923B
CN108662923B CN201810339430.4A CN201810339430A CN108662923B CN 108662923 B CN108662923 B CN 108662923B CN 201810339430 A CN201810339430 A CN 201810339430A CN 108662923 B CN108662923 B CN 108662923B
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heat exchange
screening
particle size
section
chamber
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CN108662923A (en
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李晓健
戴椰凌
郭浩
刘向军
夏德宏
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University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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    • 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
    • F28D7/08—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 the conduits being otherwise bent, e.g. in a serpentine or zig-zag
    • F28D7/082—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 the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
    • F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
    • F28C3/14—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid the particulate material moving by gravity, e.g. down a tube

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

The invention provides a device for effectively recovering waste heat of high-temperature wide-screening particle size bulk materials, and belongs to the technical field of heat exchangers. The device comprises a feeding section, a heat exchange section and a discharging section, wherein the feeding section comprises a screening plate surface, a mechanical vibration device, a feeding hopper and a material baffle plate, the heat exchange section comprises a separation plate, a snakelike calandria, a heat exchange chamber box body, an air inlet, an air outlet, a direct-indirect heat exchange mixing chamber, an indirect heat exchange chamber and a guide plate, and the discharging section comprises a discharging hopper and a discharging valve. The feeding section is provided with a 'strand-shaped' material distributing/distributing device, so that high-temperature solid bulk materials are screened due to the difference of particle sizes and enter the corresponding heat exchange section for regional waste heat recovery. The heat transfer section carries out high-efficient heat transfer according to each regional feeding particle diameter difference, arranges the material section and sets up out the hopper respectively, arranges the mass flow of material through the discharge valve independent control each region. The device simple structure is reasonable, and the flexible operation has effectively improved heat recovery efficiency, has optimized waste heat recovery technology.

Description

Device for effectively recovering waste heat of high-temperature wide-screening particle size bulk materials
Technical Field
The invention relates to the technical field of heat exchangers, in particular to a device for effectively recovering waste heat of high-temperature wide-screening particle size bulk materials.
Background
In industrial production, a large amount of high-temperature products, byproducts, waste residues and the like exist, most of the high-temperature products exist in the form of solid particles, and huge waste heat resources can be utilized. At present, more than 45 million tons of high-temperature bulk materials are produced in the industry of metallurgy and building materials every year, and the waste heat is converted into more than 1 million tons of standard coal. A large amount of industrial calcined raw materials and industrial slag in industrial production contain lumps and powder, the particle size coverage range of the industrial calcined raw materials and the industrial slag is in the mum-mm level, the mass flow rate of incoming materials has large fluctuation, and the temperature of particle phases has large difference, which brings a lot of problems for effective waste heat recovery. The residence time of the particles with different particle sizes in the moving bed is different, the heat exchange coefficients and heat exchange rules of the particles with large and small particle sizes are different, and the optimal heat exchange modes are different; meanwhile, when solid bulk materials with different particle sizes are mixed, agglomeration and bridging are easily generated among particles and between particles and on wall surfaces, and when a flow channel is narrowed, the flow channel is blocked, so that the smoothness and stability of material movement are influenced. Therefore, a method and a device for effectively recovering waste heat of high-temperature wide-screening particle size bulk materials are urgently needed to solve the defects of the prior art.
Disclosure of Invention
The invention aims to provide a device for effectively recovering waste heat of high-temperature wide-screening particle size bulk materials, which optimizes a heat recovery process, improves the heat recovery efficiency and effectively weakens the problem of stacking and bridging of high-temperature solid bulk materials.
The device is designed according to the following steps:
1. the industrial high-temperature solid bulk materials mainly comprise pellet materials, sintered ores, calcined dolomite, coke, cement and vanadium-titanium slag, and are the most common high-temperature bulk materials with wide particle size distribution and the particle size distribution range of 0.1-20 mm. The bulk cargo of wide particle size gets into the heat transfer room that the calandria interval is different after the shale shaker screening: the granule of less particle diameter, the calandria interval can set up narrower, the granule of great particle diameter, and the calandria interval can set up the broad to can combine together with direct heat transfer technique, thereby effectively improve heat recovery efficiency.
2. The particle characteristics of different particle sizes are different, and the preferred waste heat recovery mode is also different. For small particle size particles, it is difficult to organize the gas stream efficiently, indirect heat exchange being preferred. For particles with large particle size, the indirect heat exchange is insufficient and uneven in gas-solid heat exchange and long in heat exchange time, so that the direct heat exchange is preferred. The waste heat recovery device adopts (water/gas/steam) cooling type indirect heat exchange for particles with smaller particle size. For particles with larger particle size, a direct-indirect heat exchange mixing chamber is arranged for heat exchange. Wherein the upper side adopts (water/gas/steam) cooling type indirect heat exchange; the lower side adopts gas-solid counter-flow type direct heat exchange, and is provided with a guide plate, so that the falling speed of solid bulk cargo is reduced, and the retention time of a particle phase is prolonged. Meanwhile, the air vents are formed in the guide plate, so that the uniformity and the stability of heat exchange are improved.
3. High-temperature solid bulk materials with different particle sizes enter different heat exchange chambers, so that the solid bridge force among the solid bulk materials and the normal stress among particles are reduced, and the accumulation and bridging of the solid bulk materials (when large and small particle size particles are doped, the adhesion and agglomeration are more easily generated) can be reduced.
The device comprises a feeding section, a heat exchange section and a discharging section, wherein the feeding section comprises a screening plate surface, a mechanical vibration device, a feeding hopper and a baffle plate, the heat exchange section comprises a partition plate, a snakelike calandria, a heat exchange chamber box body, an air inlet, an air outlet, a direct-indirect heat exchange mixing chamber, an indirect heat exchange chamber and a guide plate, and the discharging section comprises a discharging hopper and a discharging valve; the screening face is located the device feed inlet below, the mechanical vibration device is connected to the screening face, screening face below is the feeder hopper, set up the striker plate on the feeder hopper, heat transfer chamber railway carriage or compartment body under the feeder hopper, the inside vertical division board that sets up of heat transfer chamber railway carriage or compartment body, the division board divide into direct-indirect heat transfer hybrid chamber and indirect heat transfer chamber with the heat transfer chamber railway carriage or compartment body, indirect heat transfer chamber divide into I heat transfer chamber and II heat transfer chamber two parts, set up snakelike calandria in the heat transfer chamber railway carriage or compartment body, set up the deflector in the direct-indirect heat transfer hybrid chamber, heat transfer chamber railway carriage or compartment body side lower part sets up the air inlet, heat transfer chamber railway carriage or compartment body side middle part sets up the gas vent, heat transfer chamber railway carriage or compartment body.
The screening seams of the screening plate surface are processed into a strip strand shape, the screening plate surface is bent along the width direction of the screening seams, the width of the screening seams on the upper side of the screening plate surface is narrow and dense, and the width of the screening seams on the lower side of the screening plate surface is wide and sparse.
The slope of the screening deck decreases gradually from top to bottom, and the angle of inclination between the apex of the curved surface of the screening deck and the location of the feed hopper 1/3 is greater than the angle of repose of the screened particles.
The mechanical vibration device applies vibration in the horizontal direction.
The screened particles with the particle sizes of 0.1-2mm and 2-5mm respectively enter a heat exchange chamber I and a heat exchange chamber II in the right indirect heat exchange chamber to indirectly exchange heat with a heat exchange medium in the snake-shaped calandria; the particles with the particle size of 5-20mm enter the direct-indirect heat exchange mixing chamber on the left side for heat exchange, the middle lower side of the direct-indirect heat exchange mixing chamber is air-cooled for direct heat exchange, and the upper side is indirect heat exchange.
The heat exchange medium in the indirect heat exchange chamber and the direct-indirect heat exchange mixing chamber is one of water, gas and steam.
The interval of the snakelike calandria in the heat exchange area in the heat exchange chamber carriage body is 6-10dp,maxWherein d isp,maxThe maximum particle size of the particles, and the flow direction of the tube side-shell side is a counter flow; the snakelike calandria is arranged in the same direction, for the heat transfer region that the material particle diameter is in 0.1mm-5mm, snakelike calandria wall thickness is 3-5mm, for the hot section region that the material particle diameter is in 5mm-20mm, snakelike calandria wall thickness is 5mm-10 mm.
At least one row of vent holes are formed in the guide plate, and the distance between the vent holes in the central area of the heat exchange section of the guide plate is 1.2-1.5dhAnd the area of the vent hole is 1.4d32-1.2d32The distance between the vent holes of the guide plate at the side wall is 1.5-1.8dhAnd the area of the vent hole is 1.0d32-1.2d32Wherein d ishIs the aperture of the vent hole, d32Is the Sauter mean particle size of the material.
Each heat exchange section is provided with a discharge hopper independently, and a discharge valve controls the mass flow of discharged materials independently.
The technical scheme of the invention has the following beneficial effects:
the device simple structure, reliable compactness, the operation is stable, is applicable to the material and is in wide screening particle diameter, the incoming material mass flow rate has great fluctuation and the inhomogeneous occasion of feeding temperature, the effectual heat recovery efficiency and the heat transfer homogeneity that has improved, has weakened the piling up bridge of taking of the appearance of solid bulk cargo simultaneously to can optimize bulk cargo waste heat recovery's technology.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for recovering waste heat from high-temperature wide-screening particle size bulk material according to the present invention;
FIG. 2 is a schematic view of a downward-sliding curved surface of the material in the present invention;
FIG. 3 is a schematic cross-sectional view of a screening slot A-A;
fig. 4 is a schematic view of the guide plate.
Wherein: 1-screening the board surface; 2-a mechanical vibration device; 3-a feed hopper; 4-a partition plate; 5-snake shaped calandria; 6-a heat exchange chamber carriage body; 7-a discharge hopper; 8-an air inlet; 9-an exhaust port; 10-direct-indirect heat exchange mixing chamber; 11-an indirect heat exchange chamber; 12-a striker plate; 13-a guide plate; 14-discharge valve.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a device for effectively recovering waste heat of high-temperature wide-screening particle size bulk materials, aiming at the problems that the existing medium-high temperature wide-screening particle size solid bulk materials are uneven in heat exchange and easy to generate caking and bridging.
As shown in fig. 1, the device comprises a feeding section, a heat exchange section and a discharging section, wherein the feeding section comprises a screening plate surface 1, a mechanical vibration device 2, a feeding hopper 3 and a material baffle 12, the heat exchange section comprises a partition plate 4, a snakelike calandria 5, a heat exchange chamber body 6, an air inlet 8, an air outlet 9, a direct-indirect heat exchange mixing chamber 10, an indirect heat exchange chamber 11 and a guide plate 13, and the discharging section comprises a discharging hopper 7 and a discharging valve 14; screening face 1 is located the device feed inlet below, screening face 1 connects mechanical vibration device 2, screening face 1 below is feeder hopper 3, set up striker plate 12 on the feeder hopper 3, the heat transfer chamber railway carriage or compartment body 6 is connected down to feeder hopper 3, the inside vertical division board 4 that sets up of heat transfer chamber railway carriage or compartment body 6, division board 4 divides heat transfer chamber railway carriage or compartment body 6 into direct-indirect heat transfer hybrid chamber 10 and indirect heat transfer chamber 11, indirect heat transfer chamber 11 divide into I heat transfer chamber and II heat transfer chamber two parts, set up snakelike calandria 5 in the heat transfer chamber railway carriage or compartment body 6, set up deflector 13 in the direct-indirect heat transfer hybrid chamber 10, 6 side lower parts of heat transfer chamber railway carriage or compartment body set up air inlet 8, 6 side middle parts of heat transfer chamber railway carriage or compartment body set up gas vent 9, 6 sub-unit goes out hopper 7, go out hopper 7 lower part and set.
The device screens and uniformly distributes high-temperature solid bulk materials at a feeding section, wherein the screening of the bulk materials is realized through the combined action of gravity and a vibrating screen (with transverse vibration); the uniform distribution is realized through the downward sliding curved surface of the arc-shaped material and the 'strand' -shaped screening seam dug on the curved surface.
Wherein, the curved surface that the material glides, sieve face 1 promptly is the arc, along descending the height, the slope is lower gradually, the inclination of highest point and feeder hopper 1/3 position department (being O point department) must be greater than the angle of repose of particle phase to promote smooth gliding of material, and prevent to descend the terminal particle phase's of curved surface speed and be unlikely to accelerate too big (mainly for the granule of great particle diameter), sieve face 1 adjustable gradient simultaneously, thereby can control the flow rate of feeding and guarantee the even and stable of feed inlet feeding.
The screening seams of the lower sliding curved surface are processed into a strip shape, the screening seams at the upper side are more in number and narrower in width, the screening seams are mainly used for screening particles with smaller particle size and used for indirect heat exchange at the right side, and a heat exchange medium can be water/gas/steam; the lower side screening slits are fewer in number and wider in width, are mainly used for screening larger-particle-size particles and are used for left-side (water/gas/steam) cooling type indirect heat exchange and air cooling type direct heat exchange. The thickness of the screening seam is 10-25mm, the cross section is trapezoidal, and the blocking of the screening seam caused by particle bonding can be effectively weakened.
The whole screening plate is controlled by the mechanical vibration device 2, can apply vibration in the horizontal direction, and can remove blocked particle blocks in screening gaps through vibration when solid bulk materials are blocked among screening holes.
The part of the upper side of the feed hopper 3 higher than the descending curved surface of the solid bulk material is provided with a baffle plate 12 for reducing the splashing or overflowing of the bulk material.
For particles with smaller particle size, the snakelike calandria 5 is arranged in a straight row, the tube pass-shell pass flow direction is in a countercurrent mode, for particles with larger particle size, a direct-indirect heat exchange mixing chamber 10 is arranged, the upper side adopts (water/gas/steam) cold type indirect heat exchange, the lower side adopts gas-solid countercurrent type direct heat exchange, and meanwhile, a guide plate 13 is arranged, and a vent hole is formed in the guide plate.
The discharging section is provided with a discharging hopper 7 independently for each heat exchange chamber, and the discharging mass flow is controlled by a discharging valve 14, so that the retention time of solid bulk materials with different particle sizes is controlled.
In the actual use process, after the high-temperature solid bulk materials pass through the material gliding curved surface, namely the screening plate surface 1 to be screened and uniformly distributed, particles with smaller particle sizes enter the indirect heat exchange chamber 11 to indirectly exchange heat with cold water introduced into the serpentine calandria 5; the particles with larger particle size enter a direct-indirect heat exchange mixing chamber 10, the upper side of the mixing chamber adopts (water/gas/steam) cooling type indirect heat exchange, and the lower side adopts air cooling type direct heat exchange. Cold air is pressurized by a blower, enters the heat exchange chamber through the air inlet 8 for heat exchange, and is discharged from the air outlet 9, the flow direction of the air and the solid is in a cross flow type, and the discharged air is used as preheated air for boiler combustion. The pipeline of the indirect heat exchange section is arranged into a snakelike calandria 5 which is set to be 8-10 tube passes (the quality of a heat exchange medium is improved and the pressure loss balance is comprehensively considered), the flowing direction of the tube pass and the shell pass is a counter flow, and hot water discharged from an outlet is sent to a steam turbine for waste heat power generation.
The material gliding curved surface, i.e. the structure of the screening plate surface 1, is shown in fig. 2, the material descending curved surface is arc-shaped, the slope gradually decreases along the descending height, and the inclination angle of the highest point and the position of the feed hopper 1/3 (i.e. the point O) is larger than the repose angle of the particle phase. The screening seams of the lower sliding curved surface are processed into a strip shape, the screening seams at the upper side are more in number and narrower in width, and the screening seams are mainly used for screening particles with smaller particle sizes and entering the right side (water/gas/steam cooling type) indirect heat exchange chamber 11 for heat exchange; the screening slits on the lower side are fewer in number and wider in width, and are mainly used for screening larger-particle-size particles to enter the direct-indirect heat exchange mixing chamber 10 on the left side for heat exchange. The thickness of the screening slot is 10-25mm, the cross section is trapezoidal, and as shown in figure 3, the blocking of the screening slot by particle bonding can be effectively weakened. The whole screening plate is controlled by a mechanical vibration device 2, and vibration in the horizontal direction can be applied.
The striker plate 12 is used for weakening splashing or overflowing of bulk materials, and the screening plate surface 1 is provided with a device with adjustable inclination for controlling the mass flow of imported materials and ensuring the uniformity and stability of feeding of a feeding port.
The cross section of the guide plate 13 is shown in fig. 4, so that the retention time of the particle phase can be prolonged, the temperature of a discharge port of solid bulk cargo can be reduced, and meanwhile, the guide plate 13 is provided with a plurality of vent holes in the central area of the heat exchange section, and the vent holes have larger area; the number of the vent holes on the side wall is small, and the area of the vent holes is small, so that the uniform descending speed of the solid bulk cargo is ensured.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (7)

1. The utility model provides a device to effective waste heat recovery of wide screening particle size bulk cargo of high temperature which characterized in that: the device comprises a feeding section, a heat exchange section and a discharging section, wherein the feeding section comprises a screening plate surface (1), a mechanical vibration device (2), a feeding hopper (3) and a material baffle (12), the heat exchange section comprises a partition plate (4), a snakelike calandria (5), a heat exchange chamber box body (6), an air inlet (8), an air outlet (9), a direct-indirect heat exchange mixing chamber (10), an indirect heat exchange chamber (11) and a guide plate (13), and the discharging section comprises a discharging hopper (7) and a discharging valve (14); the screening plate surface (1) is positioned below a feed inlet of the device, the screening plate surface (1) is connected with a mechanical vibration device (2), a feed hopper (3) is arranged below the screening plate surface (1), a baffle plate (12) is arranged on the feed hopper (3), a heat exchange chamber carriage body (6) is connected below the feed hopper (3), a partition plate (4) is vertically arranged inside the heat exchange chamber carriage body (6), the heat exchange chamber carriage body (6) is divided into a direct-indirect heat exchange mixing chamber (10) and an indirect heat exchange chamber (11) by the partition plate (4), the indirect heat exchange chamber (11) is divided into a heat exchange chamber I and a heat exchange chamber II, a serpentine calandria (5) is arranged in the heat exchange chamber carriage body (6), a guide plate (13) is arranged in the direct-indirect heat exchange mixing chamber (10), an air inlet (8) is arranged at the lower part of the side edge of the heat exchange chamber carriage, the lower part of the heat exchange chamber body (6) is connected with a discharge hopper (7), the lower part of the discharge hopper (7) is provided with a discharge valve (14), and a discharge hole of the device is arranged below the discharge valve (14);
the screening seam of the screening plate surface (1) is processed into a strip strand shape, the screening plate surface (1) is bent along the width direction of the screening seam, the width of the screening seam on the upper side of the screening plate surface (1) is narrow and dense, and the width of the screening seam on the lower side of the screening plate surface (1) is wide and sparse;
the screened particles with the particle sizes of 0.1-2mm and 2-5mm respectively enter a heat exchange chamber I and a heat exchange chamber II in the right indirect heat exchange chamber (11) to indirectly exchange heat with a heat exchange medium in the snake-shaped calandria (5); the particles with the particle size of 5-20mm enter the direct-indirect heat exchange mixing chamber (10) on the left side for heat exchange, the middle lower side of the direct-indirect heat exchange mixing chamber (10) is provided with air-cooled direct heat exchange, and the upper side is provided with indirect heat exchange.
2. The device for efficient waste heat recovery of high-temperature wide-screened particle size bulk material according to claim 1, characterized in that: the slope of screening face (1) reduces from top to bottom gradually, and the inclination between the curved surface apex of screening face (1) and feeder hopper (3)1/3 position is greater than the angle of repose of the granule of sieving.
3. The device for efficient waste heat recovery of high-temperature wide-screened particle size bulk material according to claim 1, characterized in that: the mechanical vibration device (2) applies vibration in the horizontal direction.
4. The device for efficient waste heat recovery of high-temperature wide-screened particle size bulk material according to claim 1, characterized in that: the heat exchange medium in the indirect heat exchange chamber (11) and the direct-indirect heat exchange mixing chamber (10) is one of water, gas and steam.
5. The device for efficient waste heat recovery of high-temperature wide-screened particle size bulk material according to claim 1, characterized in that: the interval between the snakelike calandria (5) in the heat exchange area in the heat exchange chamber carriage body (6) is 6-10dp，maxWherein d isp，maxThe maximum particle size of the particles, and the flow direction of the tube side-shell side is a counter flow; the snakelike calandria (5) is arranged in the same row, the wall thickness of the snakelike calandria (5) is 3-5mm for the heat exchange section with the material particle size of 0.1-5 mm, and the wall thickness of the snakelike calandria (5) is 5-10 mm for the heat exchange section with the material particle size of 5-20 mm.
6. The device for efficient waste heat recovery of high-temperature wide-screened particle size bulk material according to claim 1, characterized in that: one row of ventilation holes are no less than arranged on the guide plate (13), and the distance between the ventilation holes in the central area of the heat exchange section of the guide plate (13) is 1.2-1.5dhAnd the area of the vent hole is 1.4d32-1.2d32Guide toThe distance between the vent holes of the plate (13) at the side wall is 1.5-1.8dhAnd the area of the vent hole is 1.0d32-1.2d32Wherein d ishIs the aperture of the vent hole, d32Is the Sauter mean particle size of the material.
7. The device for efficient waste heat recovery of high-temperature wide-screened particle size bulk material according to claim 1, characterized in that: each heat exchange section is independently provided with a discharge hopper (7), and a discharge valve (14) independently controls the mass flow of discharged materials.
CN201810339430.4A 2018-04-16 2018-04-16 Device for effectively recovering waste heat of high-temperature wide-screening particle size bulk materials Active CN108662923B (en)

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CN113048828B (en) * 2021-02-23 2022-09-23 山西文龙中美环能科技股份有限公司 Multistage waste heat recovery device convenient to handle usefulness to cinder processing

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JPS5687478A (en) * 1979-12-18 1981-07-16 Sumitomo Cement Co Cooling device for pulverulent and granular body
CN103063061A (en) * 2013-01-24 2013-04-24 清华大学 Heat exchange method and device for bulk materials
KR20150068611A (en) * 2013-12-12 2015-06-22 주식회사 포스코 Separating appratus of heat storage ball
WO2015089572A1 (en) * 2013-12-17 2015-06-25 White Energy Innovations Pty Ltd System and method for cooling and/or classifying particulate material
CN205436324U (en) * 2015-12-25 2016-08-10 上海工业锅炉有限公司 Fluidized bed device is used in wide screening of granule
CN206683419U (en) * 2017-04-01 2017-11-28 中冶焦耐(大连)工程技术有限公司 A kind of chamber type sintering ore deposit waste-heat recovery device
CN206718235U (en) * 2017-04-21 2017-12-08 上海海湾石化有限公司 A kind of plastic grain screening machine
CN107442412B (en) * 2017-07-26 2020-05-12 北京科技大学 Natural grading and balanced distribution method and device for wide-particle-size bulk materials
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