CN219950855U - Alpha gypsum powder steam rotary crystallization kiln - Google Patents
Alpha gypsum powder steam rotary crystallization kiln Download PDFInfo
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- CN219950855U CN219950855U CN202320398978.2U CN202320398978U CN219950855U CN 219950855 U CN219950855 U CN 219950855U CN 202320398978 U CN202320398978 U CN 202320398978U CN 219950855 U CN219950855 U CN 219950855U
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- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 48
- 239000010440 gypsum Substances 0.000 title claims abstract description 48
- 239000000843 powder Substances 0.000 title claims abstract description 24
- 238000002425 crystallisation Methods 0.000 title claims abstract description 23
- 230000008025 crystallization Effects 0.000 title claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 21
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 9
- 238000004321 preservation Methods 0.000 abstract description 5
- 230000009977 dual effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The utility model belongs to the technical field of gypsum processing, and relates to an alpha gypsum powder steam rotary crystallization kiln. The device comprises a kiln body, a supporting device, a transmission device, a rotary joint and a heat exchange device, wherein the heat exchange device comprises an inner heat exchange coil and an outer heat exchange coil, the inner heat exchange coil is a tube body with a hollow semicircular cross section and is fixed on the inner wall of the kiln body in a ring shape, and the straight surface end of the inner heat exchange coil is in contact with the inner wall of the kiln body; the external heat exchange coil is a tube body with a hollow semicircular cross section and is fixed on the outer wall of the kiln body in a ring shape, and the straight surface end of the external heat exchange coil is contacted with the outer wall of the kiln body; the rotary joint is communicated with the inner heat exchange coil, and the outer heat exchange coil is communicated with the inner heat exchange coil. The device adopts pollution-free steam as a heat source and a fully-closed kiln body, so that materials are stirred in the rotary kiln body and fully heat-exchanged with the heat source, and the dual functions of an inner heat exchange coil and an outer heat exchange coil are combined, so that heat supply and heat preservation in the production process are ensured, the heat supply effect is improved, the heat exchange efficiency is improved, and the heat energy utilization rate is improved.
Description
Alpha gypsum powder steam rotary crystallization kiln
Technical Field
The utility model belongs to the technical field of gypsum processing, and relates to an alpha gypsum powder steam rotary crystallization kiln.
Background
The alpha-type high-strength gypsum is also called alpha-type semi-hydrated gypsum, and is abbreviated as alpha gypsum. Because of the advantages of high strength, high density, high hardness, high fluidity and the like, the material is widely applied to the fields of molds, precision casting, high-grade building decorative materials and the like. Currently, the conventional equipment for preparing alpha gypsum mainly comprises two types: the horizontal and vertical autoclaved reaction kettles and the liquid phase reaction kettles are fixed equipment.
In the past, the gypsum industry production basically uses coal and natural gas as main energy sources; according to the environmental protection requirement, coal is gradually eliminated and replaced in the production of gypsum projects, and natural gas and waste heat steam of a power plant are changed into main energy sources. Natural gas is not an optimal energy source because of its high cost and regional constraints. The steam is used as a waste heat utilization type heat source of the power plant, energy is saved, the environment is protected, the cost is relatively low, and therefore the technology for producing alpha-type high-strength gypsum by taking the steam as the heat source becomes particularly important in the gypsum industry. However, the existing rotary kiln for gypsum production is generally provided with heat exchange tubes only on the inner wall of the kiln body, so that the heat supply and heat preservation effects are poor, and the heat exchange efficiency is low.
Disclosure of Invention
The utility model aims to provide an alpha gypsum powder steam rotary crystallization kiln, which improves the heat supply and heat preservation effects and improves the heat exchange efficiency.
The technical scheme for solving the technical problems is as follows.
An alpha gypsum powder steam rotary crystallization kiln comprises a kiln body, a supporting device, a transmission device, a rotary joint and a heat exchange device; the kiln body is transversely arranged, a feed inlet is arranged at the end part of one end of the kiln body, and a discharge outlet is arranged on the side wall of the other end of the kiln body; the kiln body is arranged on the supporting device, the transmission device is used for driving the kiln body to rotate on the supporting device, and the rotary joint is arranged at the end part of the discharge hole of the kiln body;
the heat exchange device comprises an inner heat exchange coil and an outer heat exchange coil; the inner heat exchange coil is a tube body with a hollow semicircular cross section and is fixed on the inner wall of the kiln body in a ring shape, and the straight surface end of the inner heat exchange coil is contacted with the inner wall of the kiln body; the external heat exchange coil is a tube body with a hollow semicircular cross section and is fixed on the outer wall of the kiln body in a ring shape, and the straight surface end of the external heat exchange coil is contacted with the outer wall of the kiln body; the rotary joint is communicated with the inner heat exchange coil, and the outer heat exchange coil is communicated with the inner heat exchange coil.
According to the technical scheme, the semicircular outer surface of the inner heat exchange coil can be contacted with gypsum materials, and the radiating surface of the inner heat exchange coil is increased to be fully contacted with the materials; simultaneously, the outer heat exchange coil pipe is additionally arranged outside the kiln body, so that the inner heat exchange coil pipe and the outer heat exchange coil pipe can continuously rotate along with the kiln body, and the inner heat exchange coil pipe and the outer heat exchange coil pipe are communicated with a steam heat source, so that the inner heat exchange coil pipe plays a role in heating and lifting materials, the outer heat exchange coil pipe plays a role in heating and preserving heat, and further the heating effect and the production efficiency are improved.
Further, the alpha gypsum powder steam rotary crystallization kiln also comprises a feed end socket; the feeding end socket is connected to the feeding port of the kiln body; by opening the feeding end socket, gypsum materials can be fed into the inner cavity of the kiln body.
Further, the alpha gypsum powder steam rotary crystallization kiln is characterized in that a feeding end socket is movably connected with a feeding hole of a kiln body.
Further, the alpha gypsum powder steam rotary crystallization kiln also comprises a discharge end socket; the discharging end socket is connected to a discharging hole of the kiln body; the processed gypsum can be recovered by opening the discharging end socket.
Further, the alpha gypsum powder steam rotary crystallization kiln is characterized in that a discharging end socket is movably connected with a discharging hole of the kiln body.
Further, the alpha gypsum powder steam rotary crystallization kiln also comprises a discharging sealing box; the discharging sealing box is arranged at the discharging end of the kiln body and is communicated with the discharging port of the kiln body through a discharging flange; the discharge end of the kiln body is the tail part of the kiln body, and when the discharge flange is opened, materials and water vapor evaporated from the materials can be discharged.
The alpha gypsum powder steam rotary crystallization kiln has the beneficial effects that:
(1) The pollution-free steam is adopted as a heat source and the kiln body is totally closed, so that materials are stirred in the rotary kiln body and fully heat-exchanged with the heat source, and the dual functions of the inner heat exchange coil and the outer heat exchange coil are combined, so that heat supply and heat preservation in the production process are ensured, the heat supply effect is improved, the heat exchange efficiency is improved, and the heat energy utilization rate is improved;
(2) The pre-drying, the autoclaved crystallization and the product drying in the alpha gypsum powder production process can be carried out in the same kiln body, so that the process and the equipment quantity are effectively reduced, the production time is further shortened, and the production cost is reduced;
(3) In the whole production process, no external high-temperature steam participates in heat exchange and reaction, so that the semi-hydrated gypsum is effectively prevented from being dehydrated into dihydrate gypsum, and the quality of the product is more stable.
Drawings
FIG. 1 is a schematic diagram of a vapor rotary crystallization kiln for alpha gypsum powder according to the present utility model;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
fig. 3 is a partial enlarged view of a portion B in fig. 1.
The codes in the drawings are respectively: 1. a kiln body; 1-1, a feed inlet; 1-2, a discharge hole; 2. a support device; 3. a transmission device; 4. a rotary joint; 5. a heat exchange device; 5-1, an inner heat exchange coil; 5-2, an external heat exchange coil; 6-1, a feeding seal head; 6-2, discharging end socket; 7. and (5) discharging the sealing box.
Detailed Description
As shown in fig. 1 to 3, the alpha gypsum powder steam rotary crystallization kiln comprises a kiln body 1, a supporting device 2, a transmission device 3, a rotary joint 4, a heat exchange device 5, a feed end socket 6-1, a discharge end socket 6-2 and a discharge seal box 7.
The kiln body 1 is transversely arranged, a feed inlet 1-1 is arranged at the end part of one end of the kiln body 1, and a discharge outlet 1-2 is arranged on the side wall of the other end of the kiln body 1; the feeding end socket 6-1 is movably connected to the feeding port 1-1 of the kiln body 1, and gypsum materials can be fed into the inner cavity of the kiln body 1 by opening the feeding end socket 6-1; the discharging end socket 6-2 is movably connected to the discharging port 1-2 of the kiln body 1, and the processed gypsum can be recovered by opening the discharging end socket 6-2; in addition, the feeding end enclosure 6-1 and the discharging end enclosure 6-2 are sealed, so that the kiln body 1 can be made into a sealed steam curing space. The discharging sealing box 7 is arranged at the discharging end of the kiln body 1 and is communicated with the discharging port 1-2 of the kiln body 1 through a discharging flange; the discharge end of the kiln body 1 is the tail part of the kiln body 1, and when the discharge flange is opened, materials and water vapor evaporated from the materials can be discharged.
The kiln body 1 is arranged on the supporting device 2, the transmission device 3 is used for driving the kiln body 1 to rotate on the supporting device 2, and the rotary joint 4 is arranged at the end part of the discharge port 1-2 of the kiln body 1. The heat exchange device 5 comprises an inner heat exchange coil 5-1 and an outer heat exchange coil 5-2; the inner heat exchange coil 5-1 is a tube body with a hollow semicircular cross section and is fixed on the inner wall of the kiln body 1 in a ring shape, and the straight surface end of the tube body contacts with the inner wall of the kiln body 1, at the moment, the semicircular outer surface of the inner heat exchange coil 5-1 contacts with gypsum materials; the outer heat exchange coil 5-2 is a tube body with a hollow semicircular cross section and is fixed on the outer wall of the kiln body 1 in a ring shape, and the straight surface end of the outer heat exchange coil is in contact with the outer wall of the kiln body 1; the rotary joint 4 is communicated with the inner heat exchange coil 5-1, and the outer heat exchange coil 5-2 is communicated with the inner heat exchange coil 5-1. At this time, the inner heat exchange coil 5-1 and the outer heat exchange coil 5-2 can rotate continuously along with the kiln body 1, and the inner heat exchange coil 5-1 and the outer heat exchange coil 5-2 are communicated with the steam heat source, so that the inner heat exchange coil 5-1 plays a good heat supply effect and a good material lifting effect along with continuous heating of the steam heat source, and the outer heat exchange coil 5-2 plays a good heat supply effect and a good heat preservation effect.
The working process of the alpha gypsum powder steam rotary crystallization kiln comprises the following steps: starting the transmission device 3 to enable the kiln body 1 to rotate; starting a steam heat source to supply heat, and throwing gypsum powder into the kiln body 1 from the feed inlet 1-1; along with the rotation of the kiln body 1, the material is contacted with the inner heat exchange coil 5-1 and starts to be heated and raised until the set feeding amount is reached, the feeding is stopped, and the feeding end socket 6-1 and the discharging end socket 6-2 are closed, so that a closed steam curing space is formed inside the kiln body 1; along with the continuous heating of the heat source and the continuous rotation of the kiln body 1, the heat continuously heats, stirs and heats the gypsum materials in the kiln through the inner heat exchange coil 5-1 and the outer heat exchange coil 5-2, at the moment, the gypsum materials are heated uniformly and continuously, the free water and part of crystal water in the raw materials are gradually evaporated and removed, and a certain pressure is formed in the kiln; along with the increase of the evaporated water vapor, when the temperature and the pressure in the kiln body 1 are increased to set values, keeping the temperature and the pressure constant and continuing to stir and react until the free water of the gypsum material is completely removed, two thirds of the crystal water is removed, the gypsum material becomes semi-hydrated gypsum crystal, and the dehydration reaction is completed; at this time, the pressure is gradually released and the water vapor is discharged, and after the product is dried until the product is completely dried, the discharging end enclosure 6-2 is opened to discharge the material, and the product is obtained.
Claims (6)
1. An alpha gypsum powder steam rotary crystallization kiln is characterized by comprising a kiln body (1), a supporting device (2), a transmission device (3), a rotary joint (4) and a heat exchange device (5);
the kiln body (1) is transversely arranged, a feed inlet (1-1) is formed in the end part of one end of the kiln body (1), and a discharge outlet (1-2) is formed in the side wall of the other end of the kiln body (1);
the kiln body (1) is arranged on the supporting device (2), the transmission device (3) is used for driving the kiln body (1) to rotate on the supporting device (2), and the rotary joint (4) is arranged at the end part of the discharge port (1-2) of the kiln body (1);
the heat exchange device (5) comprises an inner heat exchange coil (5-1) and an outer heat exchange coil (5-2); the inner heat exchange coil pipe (5-1) is a pipe body with a hollow semicircular cross section and is fixed on the inner wall of the kiln body (1) in a ring shape, and the straight surface end of the inner heat exchange coil pipe is in contact with the inner wall of the kiln body (1); the external heat exchange coil pipe (5-2) is a pipe body with a hollow semicircular cross section and is fixed on the outer wall of the kiln body (1) in a ring shape, and the straight surface end of the external heat exchange coil pipe is in contact with the outer wall of the kiln body (1);
the rotary joint (4) is communicated with the inner heat exchange coil (5-1), and the outer heat exchange coil (5-2) is communicated with the inner heat exchange coil (5-1).
2. The alpha gypsum powder steam rotary crystallization kiln according to claim 1, further comprising a feed head (6-1); the feeding seal head (6-1) is connected to the feeding port (1-1) of the kiln body (1).
3. An alpha gypsum powder steam rotary crystallization kiln according to claim 2, characterized in that the feed end cap (6-1) is movably connected with the feed inlet (1-1) of the kiln body (1).
4. The alpha gypsum powder steam rotary crystallization kiln according to claim 1, further comprising a discharge head (6-2); the discharging end socket (6-2) is connected to the discharging port (1-2) of the kiln body (1).
5. The alpha gypsum powder steam rotary crystallization kiln as claimed in claim 4, wherein the discharge end socket (6-2) is movably connected with the discharge port (1-2) of the kiln body (1).
6. The alpha gypsum powder steam rotary crystallization kiln according to claim 1, further comprising a discharge seal box (7); the discharging sealing box (7) is arranged at the discharging end of the kiln body (1) and is communicated with the discharging port (1-2) of the kiln body (1) through a discharging flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320398978.2U CN219950855U (en) | 2023-03-07 | 2023-03-07 | Alpha gypsum powder steam rotary crystallization kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320398978.2U CN219950855U (en) | 2023-03-07 | 2023-03-07 | Alpha gypsum powder steam rotary crystallization kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219950855U true CN219950855U (en) | 2023-11-03 |
Family
ID=88555268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320398978.2U Active CN219950855U (en) | 2023-03-07 | 2023-03-07 | Alpha gypsum powder steam rotary crystallization kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219950855U (en) |
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2023
- 2023-03-07 CN CN202320398978.2U patent/CN219950855U/en active Active
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