CN112902647A - Three-shaft efficient pre-drying device for treating industrial byproduct gypsum - Google Patents
Three-shaft efficient pre-drying device for treating industrial byproduct gypsum Download PDFInfo
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- CN112902647A CN112902647A CN202110316891.1A CN202110316891A CN112902647A CN 112902647 A CN112902647 A CN 112902647A CN 202110316891 A CN202110316891 A CN 202110316891A CN 112902647 A CN112902647 A CN 112902647A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
- F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/04—Agitating, stirring, or scraping devices
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- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The three-axis efficient predrying device for treating the industrial byproduct gypsum comprises a base and a heat-insulating shell arranged on the base, wherein the heat-insulating shell is provided with three layers from outside to inside, the outermost layer and the middle layer form a heat-insulating cavity, and the innermost layer and the middle layer form a steam channel; a feed inlet is formed in the top of one end of the heat-insulating shell, a discharge outlet is formed in the bottom of the other end of the heat-insulating shell, and a scattering and mixing mechanism is arranged at the feed inlet; the bottom of the heat-insulating shell is arc-shaped, a hollow heat-conducting shaft is respectively arranged at the positions close to the two inner side walls and the inner wall of the bottom of the heat-insulating shell, and a plurality of hollow blades are installed on the hollow heat-conducting shaft in a staggered manner along the axis direction; the outer side of the bottom of the heat-insulating shell is symmetrically provided with an air inlet main pipe and an air outlet main pipe, and the air inlet main pipe and the air outlet main pipe are respectively provided with a plurality of air inlet branch pipes and air outlet branch pipes extending into the steam channel; the invention can improve the heat exchange efficiency and the drying effect by arranging three groups of shafting, simultaneously reasonably utilizes the calcining equipment and the waste heat generated by the calcining equipment, can improve the fuel utilization rate and save energy.
Description
Technical Field
The invention relates to the field of utilization of industrial byproduct gypsum, in particular to a triaxial efficient predrying device for treating the industrial byproduct gypsum.
Background
The industrial by-product gypsum is an industrial by-product mainly composed of calcium sulfate (mainly anhydrous and dihydrate calcium sulfate) produced by a chemical reaction in industrial production. Such as phosphogypsum produced in the production process of phosphorus chemical fertilizer, compound fertilizer and various additives, desulfurized gypsum produced by wet desulfurization of lime in large coal-fired facilities, citric acid gypsum produced in the process of preparing citric acid by fermentation method, fluorgypsum produced in the process of preparing hydrogen fluoride by decomposing fluorite with sulfuric acid, salt gypsum produced in other chemical production and the like. The industrial by-product gypsum is piled up in large quantity, which not only occupies land, but also wastes resources, the main component of the gypsum is dihydrate gypsum, which has the characteristics of high purity, stable components, small granularity, less harmful impurities and the like, is a good building material resource, after being calcined or cooked at a certain temperature, the hemihydrate gypsum (CaSO 4.0.5H 2O) is generated, has the characteristics of light weight, good fire resistance, good decorative property, good sound insulation and heat preservation property, good reprocessing and remanufacturing performance and the like, and can be widely used for gypsum cementing materials, building gypsum products, industrial moulds, artistic models and the like.
The quality of the drying and calcining process, which is a key process in the whole technical process of preparing the gypsum-based cementing material from the industrial byproduct gypsum, directly influences the quality and the cost of a gypsum product. In terms of physical properties of industrial by-product gypsum, gypsum dihydrate contains 2 crystal waters in its molecule, and some free water adheres to the surface, and the process of drying to remove the free water is called drying, and the process of removing the crystal water is called calcining. The existing process and treatment equipment are separated for the drying and calcining processes, so that on one hand, the efficiency is low, on the other hand, the heat utilization is independent, the heat loss and the environmental pollution are caused in the transfer process, and meanwhile, the heat recycling can not be realized; secondly, the existing drying equipment has small heat exchange area between the material and the heat source and low drying efficiency under the same heating volume.
Disclosure of Invention
In order to solve the technical problems, the invention provides a three-shaft efficient pre-drying device for treating industrial byproduct gypsum, three groups of shaft systems are arranged to improve the heat exchange efficiency and the drying effect, and simultaneously, the waste heat of calcining equipment and the waste heat generated by the calcining equipment are utilized to improve the utilization rate of fuel and save energy.
The technical scheme adopted by the invention is as follows: the three-axis efficient predrying device for treating the industrial byproduct gypsum comprises a base and a heat-insulating shell arranged on the base, wherein the heat-insulating shell is provided with three layers from outside to inside, the outermost layer and the middle layer form a heat-insulating cavity, and the innermost layer and the middle layer form a steam channel; a feed inlet is formed in the top of one end of the heat-insulation shell, a discharge outlet is formed in the bottom of the other end of the heat-insulation shell, and a scattering and mixing mechanism is arranged at the feed inlet; the bottom of the heat-insulation shell is arc-shaped, a hollow heat-conducting shaft is respectively arranged at the positions close to the two inner side walls and the inner wall of the bottom of the heat-insulation shell, and a plurality of hollow blades are installed on the hollow heat-conducting shaft in a staggered mode along the axis direction; the bottom outside of heat preservation casing is equipped with the main pipe of admitting air and is responsible for with the exhaust, be equipped with a plurality of respectively on the main pipe of admitting air and the main pipe of exhaust and stretch into steam channel's air intake branch pipe and exhaust branch pipe.
Furthermore, bearing seats are arranged at two ends of the heat-insulating shell, two ends of the hollow heat-conducting shaft are respectively arranged on the bearing seats, and one end of the hollow heat-conducting shaft is connected with a power output device.
Furthermore, the rotation directions of the two hollow heat conduction shafts positioned above and the hollow heat conduction shaft positioned below are opposite, the distance between the axis of each hollow heat conduction shaft and the inner wall of the heat preservation shell close to the axis of the hollow heat conduction shaft is equal, and the connecting line of the axes of the same ends of the three hollow heat conduction shafts is an equilateral triangle.
Furthermore, the outermost layer and the middle layer of the heat-insulating shell are made of load-bearing steel plates with the thickness of 10-12 mm, and the innermost layer is made of high-heat-conductivity steel plates with the thickness of 14-16 mm.
Further, the air inlet end of the hollow heat conduction shaft is communicated with a heat supply system, the air outlet end of the hollow heat conduction shaft is communicated with a waste heat utilization system, and the air inlet main pipe is communicated with the heat supply system.
Furthermore, the hollow blade is fan-shaped, and the thickness of the hollow blade gradually increases from one end of the hollow blade to the other end of the hollow blade.
Furthermore, the top of the heat-insulating shell is also provided with a moisture-discharging port.
Further, break up compounding mechanism is including transversely setting up pivot in the feed inlet to and evenly set up change epaxial blade of breaing up, the feed inlet still is equipped with the motor that provides power for the pivot outward.
Further, the heat supply system comprises a hot blast stove and a calcining furnace, the hot blast stove provides high-temperature steam, the calcining furnace provides discharged high-temperature waste gas, and the waste heat utilization system comprises a preheating feeding conveying mechanism arranged at the front end of the industrial byproduct gypsum treatment system and a building block curing kiln arranged at the tail end of the industrial byproduct gypsum treatment system.
Furthermore, the hollow blade is communicated with the hollow heat conduction shaft, and the hollow heat conduction shaft is provided with an inclination of 6-8 degrees.
The invention has the beneficial effects that:
compared with the existing dryer, the dryer has the advantages that the shell is provided with three layers, namely two layers of bearing steel plates and one layer of high-heat-conductivity steel plate, the bearing steel plates are used on the outermost layer and the middle layer, and the heat-insulating material is filled in the middle layer, so that the internal structure can be protected, and the heat loss can be reduced; the innermost layer uses a high-heat-conductivity steel plate with larger thickness, and steam is introduced between the inner layer and the bearing steel plate of the middle layer, so that on one hand, the influence caused by abrasion due to high-speed and long-time contact between the inner layer steel plate and materials can be reduced, on the other hand, the high-heat-conductivity steel plate is used, sufficient heat exchange can be more favorably carried out when the materials are in contact with the inner layer wall, the heat exchange efficiency is improved, and the drying efficiency of the dryer can be further improved due to the mutual matching of the three-; secondly, a scattering and mixing mechanism is arranged at a feed inlet of the dryer, and three groups of heat conduction shafts and blades are arranged in the dryer, so that compared with the existing two-shaft dryer, the dryer can scatter materials with certain humidity at the inlet, avoids agglomeration and influences on drying efficiency, and simultaneously, under the condition that the same feed quantity is kept by the three-shaft design, the stirring degree of the materials is larger and more uniform, the contact area between the materials and the extra blades is relatively increased, and the heat exchange efficiency can be improved;
the heat source and the waste heat trend of the invention are different from the prior drying equipment, so that on one hand, the utilization rate of the fuel is improved, the energy is saved, and the adverse effect on the environment caused by directly discharging the waste gas is avoided: firstly, one part of high-temperature steam is from high-temperature air discharged by a calcining furnace, is purified and then is introduced into a three-axis pre-dryer, the other part of high-temperature steam is from a heat supply system and plays an auxiliary role, and the high-temperature steam are synchronously introduced into a dryer and are used for drying industrial byproduct gypsum, so that the waste heat utilization of the calcining furnace is realized; and secondly, high-heat steam discharged by the three-shaft pre-dryer can be further used for waste heat utilization, for example, the high-heat steam enters a preheating feeding conveying mechanism, after temperature regulation, industrial byproduct gypsum output by a raw material system is preheated, and meanwhile, a block curing kiln can be introduced, so that waste heat utilization is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of the overall structure of a three-axis efficient predrying apparatus;
FIG. 2 is a schematic structural view of the insulated shell and a triaxial system therein;
FIG. 3 is a schematic diagram showing the effect of the arrangement of the triaxial system in the insulated housing;
FIG. 4 is a schematic structural view of a hollow heat-conducting shaft and a hollow blade;
FIG. 5 is a schematic structural view of a hollow blade;
reference numerals: 1. the base, 2, heat preservation casing, 201, heat preservation chamber, 202, steam channel, 3, feed inlet, 4, discharge gate, 5, break up compounding mechanism, 501, pivot, 502, break up the blade, 503, motor, 6, hollow heat conduction axle, 7, hollow paddle, 8, the main pipe that admits air, 801, air inlet branch pipe, 9, the exhaust is responsible for, 901, exhaust branch pipe, 10, bearing frame, 11, power take off device, 12, hydrofuge mouth.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions will be clearly and completely described below with reference to the drawings and the embodiments of the present invention. The scheme of the invention is described in detail below with reference to specific examples:
as an embodiment of the invention, as shown in fig. 1 and 3, a triaxial efficient predrying device for treating industrial byproduct gypsum comprises a base 1 and a heat-insulating shell 2 arranged on the base 1, wherein the heat-insulating shell 2 is provided with three layers from outside to inside, the outermost layer and the middle layer of the heat-insulating shell 2 are formed by bearing steel plates with the thickness of 10-12 mm, the innermost layer is formed by high-heat-conductivity steel plates with the thickness of 14-16 mm, the outermost layer and the middle layer form a heat-insulating cavity 201, and the innermost layer and the middle layer form a steam channel 202; on one hand, the innermost layer steel plate is thicker than the middle layer steel plate and the outermost layer steel plate because the innermost layer needs to be in high-speed and long-time contact with materials, certain abrasion is generated, and the thickness is relatively thick; on the other hand, the outermost layer and the middle layer can protect the internal structure by using the bearing steel plates, the heat preservation cavity 201 between the two layers of bearing steel plates is provided with the heat preservation material, the heat loss can be reduced, the innermost layer uses the high-heat-conductivity steel plate, because the high-temperature steam is introduced into the steam channel 202, when the material is contacted with the inner layer wall, the heat transfer and the heat exchange are more facilitated, and the heat exchange efficiency is improved.
As shown in fig. 1 and 2, a feed inlet 3 is formed in the top of one end of the heat-insulating shell 2, a discharge outlet 4 is formed in the bottom of the other end of the heat-insulating shell 2, and a moisture exhaust port 12 is further formed in the top of the heat-insulating shell 2; in addition, in order to ensure that the industrial byproduct gypsum raw material is in a dispersed state and is not adhered when entering the dryer, a scattering and mixing mechanism 5 is particularly arranged at the feed inlet 3: the scattering and mixing mechanism 5 comprises a rotating shaft 501 transversely arranged in the feeding hole 3 and scattering blades 502 uniformly arranged on the rotating shaft 501, and a motor 503 for providing power for the rotating shaft 501 is arranged outside the feeding hole 3.
As shown in fig. 2 and 3, the bottom of the heat-insulating housing 2 is arc-shaped, two inner side walls close to the heat-insulating housing 2 and the inner wall of the bottom are respectively provided with a hollow heat-conducting shaft 6, and the three hollow heat-conducting shafts 6 are distributed as follows: the distance between the axis of each hollow heat conduction shaft 6 and the inner wall of the heat preservation shell 2 close to the axis is equal, and the connecting line of the axes of the same ends of the three hollow heat conduction shafts 6 is an equilateral triangle; the rotation directions of the three hollow heat conduction shafts 6 are as follows: the two hollow heat conduction shafts 6 positioned above and one hollow heat conduction shaft 6 positioned below rotate in opposite directions, if the two hollow heat conduction shafts 6 above rotate clockwise synchronously, the hollow heat conduction shaft 6 below rotates anticlockwise, so that an overflow heat exchange space of industrial byproduct gypsum raw materials is formed between the two hollow heat conduction shafts 6 above and the hollow heat conduction shaft 6 below and the inner wall of the heat preservation shell 2, and the raw materials staying at the position slide to the bottom along the arc surface and flow towards an outlet along with the rotation of the hollow heat conduction shaft at the bottom; compared with the existing two-shaft dryer, the three-shaft dryer has the advantages that the three-shaft design ensures that the material is stirred more uniformly under the condition of keeping the same feeding amount, the contact area between the material and the extra blades is relatively increased, and the heat exchange efficiency can be improved;
further, as shown in fig. 4 and 5, a plurality of hollow blades 7 are installed on the hollow heat conduction shafts 6 in a staggered manner along the axis direction, three groups of hollow heat conduction shafts 6 are parallel to each other in pairs, the hollow blades 7 on two adjacent shafts are not in contact with each other, the hollow blades 7 are fan-shaped, the thickness of each hollow blade 7 is gradually increased from one end to the other end of each hollow blade 7, the hollow blades 7 are communicated with the hollow heat conduction shafts 6, and the hollow heat conduction shafts 6 are provided with an inclination of 6-8 degrees, by adopting the structure, on one hand, the hollow blades 7 can carry out spiral conveying on raw materials entering a drying device, on the other hand, high-temperature steam enters the hollow blades 7 after being input through the hollow heat conduction shafts 6, the thicknesses of two side end surfaces of the blade body are different, and the heat transfer area of the hollow blades 7 can be increased through arc transition between the two side; by means of the structure, the raw materials drop at the three groups of shafting, and are uniformly subjected to heat exchange through stirring and rotation between the two adjacent groups of shafting and the blades and at the overflow heat exchange space, and the raw materials are dried by forward surging, so that the effect is better.
The heat source in the drying device is input and output through the following structure: as shown in fig. 1 to 3, an air inlet main pipe 8 and an air outlet main pipe 9 are symmetrically arranged on the outer side of the bottom of the heat insulation shell 2, a plurality of air inlet branch pipes 801 and air outlet branch pipes 901 extending into the steam channel 202 are respectively arranged on the air inlet main pipe 8 and the air outlet main pipe 9, the air inlet main pipe 8 is communicated with a heat supply system, and high-temperature steam provided by the heat supply system can be input into the heat insulation shell 2, so that the heat exchange and heat insulation effects of the shell on raw materials are realized; secondly, the air inlet end of the hollow heat conduction shaft 6 is communicated with a heat supply system, the air outlet end of the hollow heat conduction shaft is communicated with a waste heat utilization system, high-temperature steam of the heat supply system can be input into the hollow heat conduction shaft 6 and the hollow blades 7 communicated with the hollow heat conduction shaft, and contact heat exchange between the raw materials and the blades and the shaft is realized;
furthermore, the heat source and the waste heat trend of the invention are different from the prior drying equipment, the heat supply system comprises a hot blast stove and a calcining furnace, the hot blast stove provides high-temperature steam, the calcining furnace provides discharged high-temperature waste gas, and the waste heat utilization system comprises a preheating feeding conveying mechanism arranged at the front end of the industrial byproduct gypsum treatment system and a building block curing kiln arranged at the tail end of the industrial byproduct gypsum treatment system; firstly, one part of high-temperature steam is from high-temperature air discharged by a calcining furnace, is purified and then is introduced into a three-axis pre-dryer, the other part of high-temperature steam is from a heat supply system and plays an auxiliary role, and the high-temperature steam are synchronously introduced into a dryer and are used for drying industrial byproduct gypsum, so that the waste heat utilization of the calcining furnace is realized; secondly by the high heat steam of triaxial exhaust in advance drying-machine can further carry out waste heat utilization, if get into preheating feed conveyor, through temperature regulation back, preheat the industry by-product gypsum of raw materials system output, simultaneously, still can introduce the building block maintenance kiln, realized waste heat utilization, wholly accomplished the utilization ratio that improves fuel, the energy saving, and avoided the direct discharge of waste gas to produce adverse effect to the environment.
Further, as shown in fig. 1, bearing seats 10 are arranged at two ends of the heat-insulating shell 2, two ends of the hollow heat-conducting shaft 6 are respectively installed on the bearing seats 10, one end of the hollow heat-conducting shaft is connected with a power output device 11, the power output device 11 is a motor and is connected with the hollow heat-conducting shaft 6 through a coupler, a motor is arranged on each hollow heat-conducting shaft 6, and the rotation direction and the rotation speed of each hollow heat-conducting shaft 6 can be independently controlled.
In addition to the foregoing, the foregoing shows and describes the general principles, broad features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The triaxial efficient predrying device for treating the industrial byproduct gypsum is characterized by comprising a base (1) and a heat-insulating shell (2) arranged on the base (1), wherein the heat-insulating shell (2) is provided with three layers from outside to inside, the outermost layer and the middle layer form a heat-insulating cavity (201), and the innermost layer and the middle layer form a steam channel (202); a feeding hole (3) is formed in the top of one end of the heat-insulating shell (2), a discharging hole (4) is formed in the bottom of the other end of the heat-insulating shell, and a scattering and mixing mechanism (5) is arranged at the position of the feeding hole (3); the bottom of the heat-insulation shell (2) is arc-shaped, a hollow heat-conducting shaft (6) is respectively arranged at the positions close to the two inner side walls and the inner wall of the bottom of the heat-insulation shell (2), and a plurality of hollow blades (7) are installed on the hollow heat-conducting shaft (6) in a staggered mode along the axis direction; an air inlet main pipe (8) and an air outlet main pipe (9) are symmetrically arranged on the outer side of the bottom of the heat preservation shell (2), and a plurality of air inlet branch pipes (801) and air outlet branch pipes (901) extending into the steam channel (202) are respectively arranged on the air inlet main pipe (8) and the air outlet main pipe (9).
2. The triaxial efficient predrying device for treating industrial byproduct gypsum according to claim 1, wherein bearing seats (10) are arranged at two ends of the heat-insulating shell (2), two ends of the hollow heat-conducting shaft (6) are respectively mounted on the bearing seats (10), and one end of the hollow heat-conducting shaft is connected with a power output device (11).
3. The triaxial efficient predrying device for treating industrial byproduct gypsum according to claim 1, wherein the rotation directions of the two upper hollow heat conduction shafts (6) are opposite to the rotation direction of the lower hollow heat conduction shaft (6), the distance between the axis of each hollow heat conduction shaft (6) and the inner wall of the heat preservation shell (2) close to the axis is equal, and the connecting line of the axes of the same ends of the three hollow heat conduction shafts (6) is an equilateral triangle.
4. The triaxial efficient predrying apparatus for treating industrial by-product gypsum according to claim 1, wherein the outermost layer and the intermediate layer of the heat-insulating housing (2) are made of load-bearing steel plates with a thickness of 10-12 mm, and the innermost layer is made of high thermal conductivity steel plates with a thickness of 14-16 mm.
5. The triaxial efficient predrying apparatus for treating industrial by-product gypsum according to claim 1, wherein an air inlet end of the hollow heat conduction shaft (6) is communicated with a heat supply system, an air outlet end is communicated with a waste heat utilization system, and the air inlet main pipe (8) is communicated with the heat supply system.
6. The triaxial efficient predrying apparatus for treating industrial by-product gypsum according to claim 1, wherein the hollow blade (7) has a fan shape, and the thickness of the hollow blade (7) gradually increases from one end to the other end thereof.
7. The triaxial efficient predrying apparatus for treating industrial by-product gypsum according to claim 1, wherein the top of the heat-insulating shell (2) is further provided with a moisture exhaust port (12).
8. The triaxial efficient predrying apparatus for treating industrial by-product gypsum as claimed in claim 1, wherein the scattering and mixing mechanism (5) comprises a rotating shaft (501) transversely disposed in the feeding port (3), and scattering blades (502) uniformly disposed on the rotating shaft (501), and a motor (503) for powering the rotating shaft (501) is disposed outside the feeding port (3).
9. The tri-axial efficient predrying apparatus for treating industrial by-product gypsum according to claim 5, wherein the heat supply system comprises a hot-blast stove and a calcining furnace, the hot-blast stove provides high-temperature steam, the calcining furnace provides exhausted high-temperature exhaust gas, and the waste heat utilization system comprises a preheating feeding conveying mechanism arranged at the front end of the industrial by-product gypsum treatment system and a block curing kiln arranged at the tail end of the industrial by-product gypsum treatment system.
10. The triaxial efficient predrying apparatus for treating industrial by-product gypsum according to claim 6, wherein the hollow blades (7) are communicated with the hollow heat-conducting shaft (6), and the hollow heat-conducting shaft (6) has a slope of 6-8 °.
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| CN202110316891.1A CN112902647A (en) | 2021-03-25 | 2021-03-25 | Three-shaft efficient pre-drying device for treating industrial byproduct gypsum |
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| CN202110316891.1A CN112902647A (en) | 2021-03-25 | 2021-03-25 | Three-shaft efficient pre-drying device for treating industrial byproduct gypsum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113429140A (en) * | 2021-07-27 | 2021-09-24 | 安徽檀松建筑工程有限公司 | Building gypsum board rapid draing calcining machine |
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| CN103304311A (en) * | 2013-06-05 | 2013-09-18 | 山东华粮生物工程集团股份有限公司 | Zeolite controlled-release fertilizer and manufacturing method for same |
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