CN111763021A - Gypsum calcining furnace - Google Patents
Gypsum calcining furnace Download PDFInfo
- Publication number
- CN111763021A CN111763021A CN202010589121.XA CN202010589121A CN111763021A CN 111763021 A CN111763021 A CN 111763021A CN 202010589121 A CN202010589121 A CN 202010589121A CN 111763021 A CN111763021 A CN 111763021A
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- Prior art keywords
- furnace body
- baffle
- distribution plate
- plate
- air inlet
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- 238000001354 calcination Methods 0.000 title claims abstract description 32
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 27
- 239000010440 gypsum Substances 0.000 title claims abstract description 27
- 239000002893 slag Substances 0.000 claims abstract description 81
- 238000009826 distribution Methods 0.000 claims abstract description 65
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 238000007790 scraping Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000007599 discharging Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 7
- 230000035939 shock Effects 0.000 claims description 2
- 239000013049 sediment Substances 0.000 claims 3
- 238000000926 separation method Methods 0.000 claims 1
- 238000010924 continuous production Methods 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 10
- 239000012535 impurity Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 239000011507 gypsum plaster Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
- C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained
- C04B11/036—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained for the dry process, e.g. dehydrating in a fluidised bed or in a rotary kiln, i.e. to obtain beta-hemihydrate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D25/00—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag
- F27D25/001—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag comprising breaking tools, e.g. hammers, drills, scrapers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1545—Equipment for removing or retaining slag
- F27D3/1554—Equipment for removing or retaining slag for removing the slag from the surface of the melt
- F27D3/1563—Equipment for removing or retaining slag for removing the slag from the surface of the melt by the use of scrapers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Abstract
The invention discloses a gypsum calcining furnace, wherein the lower part of a furnace body is provided with an air inlet cavity, the furnace body is provided with an air inlet communicated with the air inlet cavity, the furnace body is provided with a calcining area, the calcining area is provided with a heating pipe, a rotating shaft is arranged between the central position and the lower end plate of a gas distribution plate, the gas distribution plate is provided with a slag discharge seam, the rotating shaft is provided with a slag scraping plate and a baffle plate, the rotating shaft is provided with a driving wheel, the edge of the baffle plate is provided with inner gear teeth, an intermediate gear meshed with the inner gear teeth for transmission is arranged between the outer edge of the baffle plate and the driving wheel, one part of the driving wheel is convexly provided with driving teeth matched with the intermediate gear for transmission to enable the baffle plate to deviate from the slag discharge seam when the slag scraping plate rotates to the slag discharge seam, a spring structure is arranged between the gas distribution plate and. The invention can prevent accumulation from affecting air intake, can discharge slag into the air intake cavity and can realize continuous production.
Description
Technical Field
The invention relates to a gypsum calcining furnace, and belongs to the technical field of gypsum treatment devices.
Background
Normally, desulfurized gypsum cannot be used directly and is generally prepared as beta-hemihydrate gypsum (CaSO 4 · 0.5H2O, known in the industry as plaster of paris). The dihydrate gypsum is heated to a certain temperature and easily loses part of crystal water to become calcined gypsum. The calcination process is always the main factor influencing the quality and application of the desulfurized gypsum product, and the main problems are divided into the following three types: firstly, impurity particles are easy to remain in the desulfurized gypsum and can be deposited at the bottom of the calcining equipment, so that the production continuity is influenced; moreover, the residual impurity particles need to be stopped when being accumulated to a certain degree, and the impurities need to be cleaned manually in the treatment process, so that dust is easy to fly, the adverse effect on workers and environmental sanitation is caused, and the requirement of environmental protection is not met.
Disclosure of Invention
The invention aims to provide a gypsum calcining furnace to solve the problem that impurity particles are easy to remain in desulfurized gypsum in the prior art, so that the production continuity is influenced.
In order to achieve the purpose, the invention adopts the following technical scheme: a gypsum calcining furnace comprises a cylindrical furnace body, wherein an upper end plate and a lower end plate are sealed on upper and lower ports of the side wall of the furnace body, the top of the furnace body is respectively provided with a feed inlet and an air outlet, the upper part of the furnace body is also provided with a discharge outlet, the lower part of an inner cavity of the furnace body is an air inlet cavity formed by isolating an air distribution plate fixedly arranged in the furnace body, the feed inlet is provided with a feed pipe extending to the upper part of the air distribution plate, the furnace body is provided with an air inlet communicated with the air inlet cavity, the air distribution plate is uniformly provided with air inlets, the furnace body is provided with a calcining area, the calcining area is provided with a heating pipe, two ends of the heating pipe respectively extend out from two sides of the furnace body, a rotating shaft is arranged between the central position of the air distribution plate and the lower end plate, the air, the part of the rotating shaft, which is positioned at the lower side of the gas distribution plate, is rotatably provided with a baffle plate capable of covering slag discharge seams, the rotating shaft is fixedly provided with a driving wheel below the baffle plate, the edge of the baffle plate matched with the furnace body is provided with inner gear teeth, an intermediate gear in meshing transmission with the inner gear teeth is arranged between the outer edge of the baffle plate and the driving wheel, one part of the driving wheel is convexly provided with a driving tooth which is matched with the intermediate gear for transmission and enables the baffle plate to deviate from the slag discharge seams when the slag scraping plate rotates to the slag discharge seams, a spring structure which enables the baffle plate to reset to the position for shielding the slag discharge seams after the driving tooth is separated from the gear teeth of the intermediate gear is arranged between the gas distribution plate and the baffle plate, the gas distribution plate is provided with a blocking edge for positioning the baffle plate by overcoming the elasticity of the spring structure, the lower end plate is provided, the slag discharging port is sealed with a sealing door.
The slag discharge seam and the baffle are both in a fan shape, the central angle of the slag discharge seam is alpha, the angle of the part, overlapped with the gas distribution plate, of the baffle in front of the rotating direction of the rotating shaft is delta, the angle occupied by the driving tooth on the driving wheel is beta, the included angle between the edge of the driving tooth in front of the rotating direction of the rotating shaft and the slag scraping plate is theta, the reference circle radius R of the inner gear teeth of the baffle and the reference circle radius R of the driving tooth of the driving wheel are R (alpha plus delta)/R is less than or equal to 1.05 alpha/R; beta is more than or equal to theta + alpha and less than or equal to theta +1.05 alpha.
The slag discharge seam consists of a sector and two sector rings, the first part of the slag discharge seam close to the axis of the furnace body is in the shape of a sector, the central angles of the three parts of the slag discharge seam are sequentially reduced from the center of the furnace body to the outer edge, the baffle is in the shape of a sector, the central angle of the first part of the slag discharge seam is alpha, the angle of the front part of the baffle in the rotating direction of the rotating shaft and the overlapping part of the gas distribution plate at the first part of the slag discharge seam is delta, the angle occupied by the driving tooth on the driving wheel is beta, the included angle between the edge of the driving tooth in the front of the rotating direction of the rotating shaft and the slag scraping plate is theta, the reference circle radius R of the inner gear teeth of the baffle is R, the reference circle radius R of the driving tooth of the driving wheel, and the R (alpha; beta is more than or equal to theta + alpha and less than or equal to theta +1.05 alpha.
The radius of the first part of the slag discharge seam is half of the radius of the furnace body.
The baffle is provided with an air inlet.
The vertical distance from the lower port of the feeding pipe to the gas distribution plate is 5-10 cm.
The furnace body in have agitating unit, agitating unit's (mixing) shaft stretches into the inner chamber of furnace body, has laid stirring vane along the axial on the (mixing) shaft, the (mixing) shaft links to each other with the stirring motor transmission of fixing on the upper end plate.
And a heat exchanger for exchanging heat between materials in the discharging pipe and air in the air inlet pipe is arranged on the discharging pipe connected to the discharging port and on the air inlet pipe connected to the air inlet pipe in series.
The lateral wall of furnace body on be provided with a set of shock dynamo that arranges from top to bottom respectively in both sides.
The size of the air inlet of the air distribution plate is 40-60 meshes.
The invention is provided with the slag scraping plate and the slag discharging seam, the slag scraping plate can push and press substances falling on the gas distribution plate in the rotating process of the rotating shaft, the accumulation influence on air inlet is prevented, the accumulated gypsum powder can be blown by airflow, the calcining efficiency is improved, meanwhile, large-particle impurity particles are gathered under the pushing and pressing action of the slag scraping plate, when the baffle deviates from the slag discharging seam, the large-particle impurity particles can fall into the air inlet cavity from the slag discharging seam, the large-particle impurity particles cannot be accumulated on the gas distribution plate, the influence on calcining is avoided, the continuous production can be realized, when the slag is accumulated in the air inlet cavity to a certain degree, the sealing door can be opened for instant cleaning, the shutdown cleaning is not needed, the continuity of the industrial production can be ensured, in addition, the cleaning is simple and convenient, namely, the bag containing dust is fixed at the sealing door, the slag can instantly flow out and cannot scatter into the air. Meanwhile, the lower part of the inner cavity of the furnace body is provided with the air inlet cavity divided by the air distribution plate, the air firstly enters the air inlet cavity through the air inlet and then enters the upper part of the inner cavity of the furnace body through the air inlet, and the air is buffered by the air inlet cavity and guided by the air distribution plate, so that the air entering the upper part of the furnace body can be uniformly filled in the upper part of the inner cavity of the furnace body, the material is uniformly blown, no dead angle exists, the material can be uniformly heated and calcined, the calcining effect is good, the calcining efficiency is high, and the method is particularly suitable for industrial continuous production.
The baffle plate is provided with the air inlet hole, so that air inlet cannot be influenced when the baffle plate shields the slag discharge gap.
The calcining device is provided with the stirring device, so that the material is more uniform under the stirring action of the stirring device, no dead angle exists in the calcining process of the material, the material can be uniformly heated and calcined, the calcining effect is good, and the calcining efficiency is high.
According to the invention, the heat exchangers for exchanging heat between the material in the discharging pipe and the air in the air inlet pipe are serially arranged on the discharging pipe connected to the discharging port and the air inlet pipe connected to the air inlet pipe, the heat exchanged hot air is buffered by the air inlet cavity and guided by the air distribution plate, so that the material in the furnace body is in a boiling state, and the hot air can reduce the heat loss during calcination, thereby saving energy.
The vibrating motor on the outer wall of the furnace body can prevent materials from adhering to the inner wall of the furnace body and further ensure the continuity of industrial production without manual halt for cleaning.
Drawings
FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is an enlarged view of a portion of FIG. 2 at B;
FIG. 5 is a schematic view of the gas distribution plate of FIG. 2 (gas inlets not shown);
FIG. 6 is a schematic view of the overall structure of embodiment 2 of the present invention;
FIG. 7 is a schematic structural view of the heating tube of FIG. 6;
FIG. 8 is a schematic view of the transmission between the drive wheel, the intermediate gear and the shield of FIG. 2;
FIG. 9 is a schematic view of a gas distribution plate according to example 3 of the present invention.
Detailed Description
An embodiment 1 of a gypsum calcining furnace, in fig. 1 to 5, comprises a furnace body 1, wherein the furnace body 1 is cylindrical, the inner surface and the outer surface of the furnace body 1 are cylindrical surfaces, and the upper opening and the lower opening of the side wall of the furnace body 1 are sealed with an upper end plate and a lower end plate 2, so that the furnace body 1 has a square inner cavity. The lower part of the inner cavity of the furnace body 1 is provided with a gas distribution plate 3, the edge of the gas distribution plate extends to the inner wall of the furnace body 1 and is fixed on the inner surface of the gas distribution plate, thus the lower part of the inner cavity of the furnace body 1 is separated by the gas distribution plate 3 to form a gas inlet cavity 5, gas inlets 4 are uniformly distributed on the gas distribution plate 3, and the size of the gas inlets 4 of the gas distribution plate 3 is 50 meshes. An air inlet 6 is arranged on the furnace body 1, the air inlet 6 communicates the air inlet cavity 5 with the outside, and the air inlet 6 is connected with an air inlet pipe 21.
A rotating shaft 18 is arranged between the central position of the gas distribution plate 3 and the lower end plate 2, the rotating shaft 18 is rotatably assembled with the gas distribution plate 3 and the lower end plate 2 through bearings, and two ends of the rotating shaft 18 respectively extend out of the gas distribution plate 3 and the lower end plate 2. The gas distribution plate 3 is provided with a slag discharge slit 19 extending from the center to the edge, the slag discharge slit 19 is fan-shaped, and the center of the fan-shaped slit is positioned at the center of the gas distribution plate 3. The pivot 18 that stretch out gas distribution plate 3 on the upside part be fixed with the scum board 20, the scum board 20 is vertical setting, four sides have, a side is up, a side is down, side and gas distribution plate clearance fit down, a material for scraping on the gas distribution plate, fix in the pivot two sides of scum board 20, another extends to on the inner wall of furnace body 1, in the pivoted in-process of pivot 18, can take the scum board 20 to rotate, the scum board 20 can be scraped the material on gas distribution plate 3, prevent that tiny likepowder from gluing on gas distribution plate 3, keep gas distribution plate 3 fresh and cool, can be reliable guarantee gas distribution plate's work, further guarantee the work of whole product. The scraper bar 20 can gather large-particle slag, and when the scraper bar 20 moves to the position of the slag discharge slit 19, the slag can fall into the air inlet cavity through the slag discharge slit without affecting the calcining work of the furnace body. The part of the rotating shaft 18, which is positioned at the lower side of the gas distribution plate 3, is rotatably provided with a baffle plate 22 which can shield the slag discharge slit 19, namely, the baffle plate can shield the slag discharge slit when positioned right below the slag discharge slit, and the baffle plate 22 can rotate and can also leave the slag discharge slit. An air intake is also provided in the baffle 22. The baffle 22 is rotatably mounted to the shaft by bearings. A driving wheel 23 is fixed on the rotary shaft 18 at the position below the baffle, the driving wheel 23 is not a full gear, a part of the outer periphery of the driving wheel is provided with transmission teeth, the edge of the baffle matched with the furnace body is provided with inner gear teeth, the inner gear teeth are arranged on an annular edge convexly arranged on the lower surface of the baffle 22, an intermediate gear 24 in meshing transmission with the inner gear teeth is arranged between the outer edge of the baffle 22 and the driving wheel 23, the intermediate gear 24 is rotatably assembled on a wheel shaft fixed on the gas distribution plate 3, the intermediate gear 24 is a full gear and is meshed with the inner gear teeth, the part of the transmission teeth of the driving wheel can be meshed with the intermediate gear when rotating to the intermediate gear, the baffle is finally driven to rotate to deviate from the slag discharge gap, in order to ensure that the baffle leaves the slag discharge gap when the slag-scraping plate reaches the slag discharge gap, the position of the driving wheel provided with the transmission teeth, on the premise that the inner gear teeth are all arranged on the outer edge of the baffle, theoretically, specific angles of the inner gear teeth and the slag discharge seam are determined by meshing arc lines of the inner gear teeth on the baffle, the central angle of the slag discharge seam and the transmission ratio between the driving wheel and the inner gear teeth of the baffle, and meanwhile, in order to ensure that the baffle can deviate from the slag discharge seam before the slag discharge plate arrives, the actual angle is larger than a calculated value, because the slag discharge plate has certain thickness, the minimum angle of the included angle between the transmission gear and the slag discharge plate is referred to, the angle occupied by the transmission gear is referred to the angle occupied by the transmission gear on the graduated circle, and the edge of the transmission gear is also referred to the farthest end on the graduated circle. In addition, in order to realize the movement of the baffle plate deviating from the slag discharge seam, when the baffle plate is at the position for shielding the slag discharge seam, the corresponding side of the inner gear teeth should be just meshed with the gear teeth of the intermediate gear, the inner gear teeth continue to be meshed with the gear teeth of the intermediate gear along with the movement until all the inner gear teeth are meshed with each other, the baffle plate does not move any more, at this time, the transmission teeth of the driving wheel also rotate away from the gear teeth of the intermediate gear, the power transmission of the gear transmission system is finished, and the slag scraping plate should pass through the slag discharge seam before the power transmission is finished, in the embodiment, the central angle of the slag discharge seam is alpha, the angle of the part of the baffle plate, which is overlapped with the gas distribution plate, in front of the rotation direction of the rotating shaft is delta, the angle occupied by the driving teeth on the driving wheel is beta, the included angle between the edge of the driving teeth in front of, the reference circle radius r of the driving tooth of the driving wheel, then: θ = R (α + Δ)/R; β = θ + α, where Δ is a small quantity with a value less than 0.05 α. A torsion spring which enables the baffle to reset to the position of shielding the slag discharge seam after the driving gear and the gear tooth of the intermediate gear are separated is arranged between the gas distribution plate 3 and the baffle 22, a baffle edge which enables the elasticity of the torsion spring to be positioned for the baffle 22 is also arranged on the gas distribution plate 3, a rotating shaft driving motor 25 is arranged on the lower end plate 2, the rotating shaft driving motor 25 is in transmission connection with the rotating shaft 18, a slag discharge port is formed in the lower end plate 2, and a sealing door is arranged on the slag discharge port in a sealing mode.
Still have agitating unit on furnace body 1, agitating unit's (mixing) shaft 8 stretches into the inner chamber of furnace body 1 along the axial of furnace body 1 in, has laid stirring vane 9 along the axial on (mixing) shaft 8, and the upper end of (mixing) shaft 8 stretches out on by furnace body upper end plate 7, still fixedly is provided with agitator motor 11 on upper end plate 7, and the upper end of (mixing) shaft 8 links to each other with agitator motor 11 transmission, and agitator motor 11 drive (mixing) shaft 8 rotates, and agitating unit here is the commonly used agitating unit in this field. A feed inlet and a gas outlet 13 are respectively formed in the upper end plate 7, the feed inlet and the gas outlet 13 are respectively located on two sides of the stirring motor 11, a feed pipe 12 is inserted into the feed inlet, and the vertical distance from the lower end port of the feed pipe 12 to the gas distribution plate is 8 cm.
The upper portion of the furnace body 1 is provided with a discharge port, the discharge port inclines downwards, a discharge pipe 15 is connected to the discharge port, a heat exchanger 14 is arranged on the discharge pipe 15 and an air inlet pipe 21 in series, the heat exchanger 14 is used for heat exchange of materials in the discharge pipe and air in the air inlet pipe, therefore, air entering an air inlet cavity and used for blowing up the materials in the furnace body is not completely cold air, and a part of heat can be recycled, and the heat exchanger is a tube type heat exchanger and belongs to a commercially available part. The hot air from the heat exchanger 14 passes through the centrifugal fan 16 into the gas chamber.
The side wall of the furnace body 1, that is, the side wall of the furnace body 1, is provided with a calcination area, heating pipes 17 are arranged in the calcination area, each heating pipe 17 is arranged in a matrix shape, two ends of each heating pipe 17 respectively extend out from two sides of the side wall of the furnace body 1 in a sealing manner, one end of each heating pipe 17 is used for feeding a calcination medium, and the other end of each heating pipe 17 is used for discharging the calcination medium.
A group of vibrating motors 10 arranged from top to bottom are respectively arranged on the two sides of the outer side wall of the furnace body 1.
The vertical distance from the lower port of the feed pipe to the gas distribution plate in this embodiment is 8cm, and in other embodiments the vertical distance from the lower port of the feed pipe to the gas distribution plate may be selected to be between 5 and 10 cm.
The gas distribution plate in this embodiment has inlet holes of 50 mesh size, and in other embodiments can be selected between 40-60 mesh.
An embodiment 2 of a gypsum calcining furnace is shown in fig. 6 and 7, and is combined with fig. 2, and the difference between the embodiment and the embodiment 1 is that the part of the heating pipe in the inner cavity of the furnace body is a coil pipe, and the number of the whole heating pipes is less than that of the embodiment 1 because the part of the heating pipe in the inner cavity of the furnace body is the coil pipe.
An embodiment 3 of a gypsum calcining furnace, in fig. 9, in combination with fig. 2 and 8, is different from the embodiment 1 in that a slag discharge slit 19 is composed of a segment of a fan and two segments of a fan ring, wherein the segment of the fan ring is a segment of a ring which is cut by two radii, and the central angle of the segment is the included angle between the two radii. The first part of the slag discharge seam close to the axis of the furnace body is in a fan shape, the other two parts are in fan-shaped rings, the radius of the first part of the slag discharge seam is half of the radius of the furnace body, the central angles of the three parts of the slag discharge seam are sequentially reduced from the center of the furnace body to the outer edge, the baffle plate correspondingly blocking the slag discharge seam is still in the fan shape, the central angle of the first part of the slag discharge seam is alpha, the angle of the front part of the baffle plate in the rotating direction of the rotating shaft and the overlapped part of the gas distribution plate at the first part of the slag discharge seam is delta, the angle occupied by the driving tooth on the driving wheel is beta, the included angle between the edge of the driving tooth in the front of the rotating direction of the rotating shaft and the slag scraping plate is theta, the reference circle radius R of the inner gear teeth of the baffle plate, and the; β = θ + α.
θ = R (α +. DELTA)/R in the present embodiment described above; β = θ + α, and in other examples the following condition is satisfied: r (alpha plus delta)/R is not less than theta and not more than 1.05 alpha/R; beta is more than or equal to theta + alpha and less than or equal to theta +1.05 alpha.
The vertical distance from the lower port of the feed pipe to the gas distribution plate in the above embodiment is 8cm, and in other embodiments the vertical distance from the lower port of the feed pipe to the gas distribution plate may be selected to be between 5 and 10 cm.
The gas distribution plate in the above embodiment has a gas inlet hole size of 50 mesh, and in other embodiments can be selected between 40-60 mesh.
The heat exchanger and the stirring device are arranged in the above embodiment, and the heat exchanger and the stirring device are not required in other embodiments.
Claims (10)
1. The utility model provides a gypsum calcining furnace, includes cylindric furnace body, seals on the upper and lower port of the lateral wall of furnace body and is equipped with upper end plate and lower end plate, and the furnace body top is provided with feed inlet and gas outlet respectively, and furnace body upper portion still is provided with discharge gate, its characterized in that: the lower part of the inner cavity of the furnace body is an air inlet cavity separated by an air distribution plate fixedly arranged in the furnace body, the feed inlet is provided with a feed pipe extending to the upper part of the air distribution plate, the furnace body is provided with an air inlet communicated with the air inlet cavity, the air inlet is uniformly distributed on the air distribution plate, the furnace body is provided with a calcining area, the calcining area is provided with a heating pipe, two ends of the heating pipe respectively extend out from two sides of the furnace body, a rotating shaft is arranged between the central position and the lower end plate of the air distribution plate, the air distribution plate is provided with a slag discharge seam extending from the center to the edge, the part of the rotating shaft positioned at the upper side of the air distribution plate is fixedly provided with a vertically arranged slag scraping plate, the part of the rotating shaft positioned at the lower side of the air distribution plate is rotatably provided with a baffle plate capable of covering the slag discharge seam, be provided with between the outer fringe of baffle and the action wheel with interior gear engagement drive's intermediate gear, the partly protruding initiative tooth that is equipped with and makes the baffle skew arrange the sediment seam when the scum board changes to arranging the sediment seam with intermediate gear cooperation transmission of action, be provided with between gas distribution board and the baffle and make the baffle reset to the spring structure who shelters from the position of arranging the sediment seam after the teeth of a cogwheel separation of initiative tooth and intermediate gear, gas distribution board on be provided with the fender edge of overcoming spring structure for the baffle location, be provided with pivot driving motor on the lower end plate, pivot driving motor links to each other with the pivot transmission, the lower end plate on seted up the row's of slag mouth, arrange the slag mouth upper seal and be equipped with the sealing door.
2. The gypsum calciner of claim 1, wherein: the slag discharge seam and the baffle are both in a fan shape, the central angle of the slag discharge seam is alpha, the angle of the part, overlapped with the gas distribution plate, of the baffle in front of the rotating direction of the rotating shaft is delta, the angle occupied by the driving tooth on the driving wheel is beta, the included angle between the edge of the driving tooth in front of the rotating direction of the rotating shaft and the slag scraping plate is theta, the reference circle radius R of the inner gear teeth of the baffle and the reference circle radius R of the driving tooth of the driving wheel are R (alpha plus delta)/R is less than or equal to 1.05 alpha/R; beta is more than or equal to theta + alpha and less than or equal to theta +1.05 alpha.
3. The gypsum calciner of claim 1, wherein: the slag discharge seam consists of a sector and two sector rings, the first part of the slag discharge seam close to the axis of the furnace body is in the shape of a sector, the central angles of the three parts of the slag discharge seam are sequentially reduced from the center of the furnace body to the outer edge, the baffle is in the shape of a sector, the central angle of the first part of the slag discharge seam is alpha, the angle of the front part of the baffle in the rotating direction of the rotating shaft and the overlapping part of the gas distribution plate at the first part of the slag discharge seam is delta, the angle occupied by the driving tooth on the driving wheel is beta, the included angle between the edge of the driving tooth in the front of the rotating direction of the rotating shaft and the slag scraping plate is theta, the reference circle radius R of the inner gear teeth of the baffle is R, the reference circle radius R of the driving tooth of the driving wheel, and the R (alpha; beta is more than or equal to theta + alpha and less than or equal to theta +1.05 alpha.
4. The gypsum calciner of claim 3, wherein: the radius of the first part of the slag discharge seam is half of the radius of the furnace body.
5. The gypsum calciner according to any one of claims 1 to 4, characterized in that: the baffle is provided with an air inlet.
6. The gypsum calciner of claim 5, wherein: the vertical distance from the lower port of the feeding pipe to the gas distribution plate is 5-10 cm.
7. The gypsum calciner of claim 6, wherein: the furnace body in have agitating unit, agitating unit's (mixing) shaft stretches into the inner chamber of furnace body, has laid stirring vane along the axial on the (mixing) shaft, the (mixing) shaft links to each other with the stirring motor transmission of fixing on the upper end plate.
8. The gypsum calciner of claim 7, wherein: and a heat exchanger for exchanging heat between materials in the discharging pipe and air in the air inlet pipe is arranged on the discharging pipe connected to the discharging port and on the air inlet pipe connected to the air inlet pipe in series.
9. The gypsum calciner of claim 8, wherein: the lateral wall of furnace body on be provided with a set of shock dynamo that arranges from top to bottom respectively in both sides.
10. The gypsum calciner of claim 1, wherein: the size of the air inlet of the air distribution plate is 40-60 meshes.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112595127A (en) * | 2020-12-18 | 2021-04-02 | 重庆岩昱节能科技有限公司 | Waste heat recovery heat absorption assembly for calcium carbide smelting |
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Denomination of invention: A gypsum calciner Effective date of registration: 20221012 Granted publication date: 20210921 Pledgee: Guangfa Bank Co.,Ltd. Zhengzhou Xinzheng Sub branch Pledgor: Henan Jieyuan new building materials Co.,Ltd. Registration number: Y2022980017993 |
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Date of cancellation: 20231108 Granted publication date: 20210921 Pledgee: Guangfa Bank Co.,Ltd. Zhengzhou Xinzheng Sub branch Pledgor: Henan Jieyuan new building materials Co.,Ltd. Registration number: Y2022980017993 |