CN219252592U - Hydrothermal reaction kettle with high-strength gypsum crystal transition agent feeder - Google Patents

Hydrothermal reaction kettle with high-strength gypsum crystal transition agent feeder Download PDF

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Publication number
CN219252592U
CN219252592U CN202320291936.9U CN202320291936U CN219252592U CN 219252592 U CN219252592 U CN 219252592U CN 202320291936 U CN202320291936 U CN 202320291936U CN 219252592 U CN219252592 U CN 219252592U
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stirring
reaction kettle
stirring shaft
hydrothermal reaction
horizontal distribution
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CN202320291936.9U
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刘程琳
李丽
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Suzhou Juzhi Tongchuang Environmental Protection Technology Co ltd
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Suzhou Juzhi Tongchuang Environmental Protection Technology Co ltd
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Abstract

The utility model provides a hydrothermal reaction kettle with a high-strength gypsum crystal-transformation agent feeder, which comprises a kettle body and a stirring device arranged at the axis of the kettle body, wherein the upper part of the kettle body is provided with a reaction kettle inlet, and the bottom end of the kettle body is provided with a reaction kettle outlet; the stirring device comprises a hollow stirring shaft, the upper end of the stirring shaft penetrates through the top end of the kettle body and is connected with a driving device arranged above the kettle body, the top end of the stirring shaft is a crystal former inlet, the lower part of the stirring shaft is connected with a double-layer stirring paddle, a first feeding distributor communicated with the stirring shaft is arranged between the double-layer stirring paddles, and the first feeding distributor comprises a plurality of layers of horizontal distribution pipes. The mode of adopting center (mixing) shaft feeding to change brilliant agent utilizes the (mixing) shaft to drive the feeding distributor and rotates together, forms the combined action of pressure difference and rotatory centrifugal force at input pressure, stirring, evenly drops into the cauldron to evenly diffuse into the thick liquids under the effect of double-deck stirring rake, the mixing effect is good, has improved reation kettle's production efficiency and product quality.

Description

Hydrothermal reaction kettle with high-strength gypsum crystal transition agent feeder
Technical Field
The utility model belongs to the technical field of high-strength gypsum production processes, and particularly relates to a hydrothermal reaction kettle with a high-strength gypsum crystal transition agent feeder.
Background
The high-strength gypsum is alpha-type semi-hydrated gypsum, is a novel material with good mechanical property, working property, environmental protection property and biological property, has the advantages of low water demand, high compactness and fine particles, and is widely applied to the fields of building materials, medical medicines, light industry, foods and the like.
At present, the process for preparing the high-strength gypsum mainly comprises an autoclaved method, a hydrothermal method and a normal-pressure salt solution method, and alpha-type semi-hydrated gypsum is prepared from dihydrate gypsum through crystal transformation. The autoclaved method has the advantages of high energy consumption, high requirements on reaction equipment, difficult control of the reaction process and the product performance and unstable product quality. The reaction temperature of the normal pressure salt solution method is generally below 100 ℃, the pressure condition is normal pressure, the reaction condition is mild, the energy consumption is low, but the problems of easy corrosion of equipment, salt ion residue and the like exist, and the reaction still stays in the small test and pilot test stages. The crystal phase transformation of the hydrothermal method is carried out in a liquid phase, and the prepared alpha high-strength gypsum crystal has good appearance integrity and stable performance, and is a relatively common synthesis process.
In the preparation process of the high-strength gypsum by the hydrothermal method, a crystal transfer agent solution is required to be added as an auxiliary agent to promote crystal transfer, and the crystal transfer agent is ensured to be fully contacted with the solid-liquid mixture in the kettle. The uneven addition of the crystal transfer agent is easy to cause unstable product performance, and in order to avoid the problem caused by the uneven addition of the crystal transfer agent, it is necessary to provide a hydrothermal reaction kettle with a high-strength gypsum crystal transfer agent feeder to improve the uniformity of the addition of the crystal transfer agent.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides a hydrothermal reaction kettle with a high-strength gypsum crystal-transformation agent feeder, wherein a crystal-transformation agent is uniformly fed into the reaction kettle body through the arrangement of a feeding distributor in a feeding manner by a central stirring shaft, and is uniformly mixed with gypsum slurry, so that the production efficiency and the product quality of crystal-transformation reaction are improved.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
hydrothermal reaction kettle with high-strength gypsum crystal transition agent feeder, hydrothermal reaction kettle include the cauldron body with set up in agitating unit in cauldron body axle center, wherein:
the upper part of the kettle body is provided with a reaction kettle inlet, the bottom end of the kettle body is provided with a reaction kettle outlet, and the inner wall of the kettle body is provided with a plurality of baffles;
the stirring device comprises a hollow stirring shaft, the upper end of the stirring shaft penetrates through the top end of the kettle body and is connected with a driving device arranged above the kettle body, the top end of the stirring shaft is provided with a crystal transformation agent inlet, the lower part of the stirring shaft is connected with a double-layer stirring paddle, a first feeding distributor communicated with the stirring shaft is arranged between the double-layer stirring paddles, the first feeding distributor comprises a plurality of layers of horizontal distribution pipes which are vertically arranged on the stirring shaft, the tail end of each horizontal distribution pipe is provided with a crystal transformation agent outlet, and the stirring shaft and the inner cavity of the first feeding distributor form a crystal transformation agent feeding channel for evenly throwing the crystal transformation agent into gypsum slurry in the kettle body.
The utility model is further arranged that the effective volume of the kettle body of the hydrothermal reaction kettle is 10-50 m 3 The diameter is 1-5 m, and the height is 2-5 m.
The utility model is further characterized in that a heat exchange jacket is arranged outside the kettle body of the hydrothermal reaction kettle, and the heat exchange area of the kettle body is 200-1000 m 2 The method comprises the steps of carrying out a first treatment on the surface of the In the crystal transformation reaction, the retention time of gypsum crystal transformation is required to be ensured to be 1-8 h.
The stirring shaft penetrates through the frame, is connected with the motor through the speed reducer, and drives the stirring shaft to rotate through the motor.
The utility model further provides that the blades of the double-layer stirring paddle are selected from one of a oblique blade stirring paddle, a screw stirring paddle and a turbine stirring paddle.
The utility model is further characterized in that the horizontal distributing pipes of each layer in the first feeding distributor are uniformly and symmetrically distributed by taking the stirring shaft as an axis, and the number of the horizontal distributing pipes of each layer is 2-6.
The utility model is further arranged that the length of the horizontal distributing pipe is 1/2-2/3 of the radius of the double-layer stirring paddle.
The utility model is further arranged that the number of layers of the horizontal distribution pipes in the first feeding distributor is 2-5, and the length of each horizontal distribution pipe is gradually increased from top to bottom.
The utility model further provides that the pipe diameter of each layer of horizontal distribution pipe gradually increases from top to bottom.
The utility model is further arranged that the tail end outlet of the horizontal distribution pipe is provided with an inclined pipe orifice, and the included angle between the inclined pipe orifice and the central axis of the horizontal distribution pipe is 45-60 degrees.
The utility model is further characterized in that a second feeding distributor communicated with the stirring shaft is arranged above the double-layer stirring paddle on the stirring shaft, the second feeding distributor comprises a plurality of layers of inclined distributing pipes with downward outlets, the tail ends of the inclined distributing pipes are also crystal transferring agent outlets, and the tail ends of the inclined distributing pipes are higher than the liquid level of slurry in the kettle body during crystal transferring reaction and are used for throwing part of crystal transferring agent into gypsum slurry in the kettle body from the liquid level.
The utility model is further characterized in that the inclined distributing pipes of each layer in the second feeding distributor are uniformly and symmetrically distributed by taking the stirring shaft as the axis, and the number of the inclined distributing pipes of each layer is 2-6.
The utility model is further arranged that the included angle between the inclined distribution pipe in the second feeding distributor and the stirring shaft is 30-45 degrees, and the included angle between each layer of inclined distribution pipe and the stirring shaft is the same.
The utility model is further arranged that the pipe diameter of the inclined distributing pipe in the second feeding distributor is smaller than the pipe diameter of the horizontal distributing pipe in the first feeding distributor.
Compared with the prior art, the utility model has the following beneficial effects:
(1) The mode of feeding the crystal transfer agent by the central stirring shaft is adopted, and a crystal transfer agent feeding port is not required to be additionally added, so that the structure of the jacket heating type hydrothermal reaction kettle is simplified.
(2) The stirring shaft is utilized to drive the feeding distributor to rotate together, and the crystal-transferring agent is uniformly put into the gypsum slurry in the kettle under the combined action of the pressure input by the crystal-transferring agent inlet, the pressure difference formed by stirring slurry and the centrifugal force formed by rotation.
(3) Because the combined acting force is large, the phenomenon of blocking the pipeline due to gypsum crystallization is not easy to occur.
(4) After entering the kettle body through the feeding distributor, the crystal transformation agent directly enters the stirring core area and is uniformly diffused into the slurry in the kettle body through the nearby strong shearing force under the action of the double-layer stirring paddles, the mixing effect is good, the production efficiency and the product quality of the reaction kettle are improved, and the high-strength gypsum product with complete appearance, small length-diameter ratio and uniform granularity can be prepared.
Drawings
FIG. 1 is a schematic structural diagram of a hydrothermal reaction kettle with a high-strength gypsum crystal-transfer agent feeder of the present utility model.
The reference numerals are: the reactor comprises a reactor body 1, a reactor inlet 2, a reactor outlet 3, a baffle 4, a stirring shaft 5, a double-layer stirring paddle 6, a first feeding distributor 7, a horizontal distributing pipe 7-1, a frame 8, a speed reducer 9, a motor 10, a second feeding distributor 11, an inclined distributing pipe 11-1 and a heat exchange jacket 12.
Detailed Description
The technical scheme of the utility model is further described below by the preferred embodiments with reference to the accompanying drawings.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
According to the hydrothermal reaction kettle with the high-strength gypsum crystal-transformation agent feeder provided by the utility model, which is shown in fig. 1, the hydrothermal reaction kettle comprises a kettle body 1 and a stirring device arranged at the axis of the kettle body 1, wherein the upper part of the kettle body 1 is provided with a reaction kettle inlet 2, the bottom end is provided with a reaction kettle outlet 3, and a plurality of baffles 4 are arranged on the inner wall; the stirring device comprises a hollow stirring shaft 5, the upper end of the stirring shaft 5 penetrates through the top end of the kettle body 1 and is connected with a driving device arranged above the kettle body 1, the top end of the stirring shaft 5 is a crystal former inlet (not shown in the figure), the lower part of the stirring shaft 5 is connected with a double-layer stirring paddle 6, a first feeding distributor 7 communicated with the stirring shaft 5 is arranged between the double-layer stirring paddles 6, the first feeding distributor 7 comprises a plurality of layers of horizontal distribution pipes 7-1 which are vertically arranged with the stirring shaft 5, the tail ends of the horizontal distribution pipes 7-1 are crystal former outlets, the stirring shaft 5 and the inner cavity of the first feeding distributor 7 form a crystal former feeding channel, the crystal former is driven to rotate together by the stirring shaft 5, and is uniformly thrown into gypsum slurry in the kettle body 1 under the combined action of pressure input by the crystal former inlet, pressure difference formed by stirring slurry and centrifugal force formed by rotation.
Further, the effective volume of the kettle body 1 of the hydrothermal reaction kettle is 10-50 m 3 The diameter is 1-5 m, and the height is 2-5 m. The outside of the kettle body 1 is provided with a heat exchange jacket 12, and the heat exchange area of the kettle body 1 is 200-1000 m 2 In the process of crystal transformation reaction, the retention time of gypsum crystal transformation is required to be ensured to be 1-8 h.
Further, the driving device comprises a frame 8, a speed reducer 9 and a motor 10 which are arranged above the kettle body 1, the stirring shaft 5 penetrates through the frame 8 and is connected with the motor 10 through the speed reducer 9, and the stirring shaft 5 is driven to rotate through the motor 10.
Further, the blades of the double-layer stirring paddle 6 may be any one selected from a diagonal blade type stirring paddle, a propeller type stirring paddle, and a turbine type stirring paddle.
Further, the horizontal distribution pipes 7-1 of each layer in the first feeding distributor 7 are uniformly and symmetrically distributed by taking the stirring shaft 5 as an axis, and the number of the horizontal distribution pipes 7-1 of each layer is 2-6.
Furthermore, in order to enable the crystal transformation agent to enter the kettle body 1 and then directly enter the stirring core area, the crystal transformation agent is uniformly distributed in the slurry under the action of the double-layer stirring paddles 6, and the length of the horizontal distribution pipe 7-1 is 1/2-2/3 of the radius of the double-layer stirring paddles 6; furthermore, the number of layers of the horizontal distribution pipes 7-1 in the first feeding distributor 7 is set to 2-5, and the length of each horizontal distribution pipe 7-1 gradually increases from top to bottom, so that the distribution uniformity of the crystal transformation agent is further improved.
Further, in order to balance the static pressure head difference at the crystal former outlet of each layer of horizontal distribution pipe 7-1 in the first feeding distributor 7, the crystal former feeding amount of each layer of horizontal distribution pipe 7-1 is balanced, and the pipe diameter of each layer of horizontal distribution pipe 7-1 is gradually increased from top to bottom.
Further, the outlet at the tail end of the horizontal distribution pipe 7-1 is an inclined pipe orifice, and the included angle between the inclined pipe orifice and the central axis of the horizontal distribution pipe 7-1 is 45-60 degrees.
Further, a second feeding distributor 11 which is communicated with the stirring shaft 5 is further arranged above the double-layer stirring paddle 6 on the stirring shaft 5, the second feeding distributor 11 comprises a plurality of inclined distributing pipes 11-1 with downward outlets, the tail ends of the inclined distributing pipes 11-1 are also crystal transformation agent outlets, and the tail ends of the inclined distributing pipes are higher than the liquid level of slurry in the kettle body 1 during crystal transformation reaction and are used for throwing part of crystal transformation agent into gypsum slurry in the kettle body 1 from the liquid level, so that the uniformity of crystal transformation agent feeding and dispersing is further improved.
Furthermore, the inclined distribution pipes 11-1 of each layer in the second feeding distributor 11 are uniformly and symmetrically distributed by taking the stirring shaft 5 as an axis, and the number of the inclined distribution pipes 11-1 of each layer is 2-6.
Further, the included angle between the inclined distributing pipe 11-1 in the second feeding distributor 11 and the stirring shaft 5 is 30-45 degrees, and the included angle between each layer of inclined distributing pipe 11-1 and the stirring shaft 5 is kept consistent.
Further, the pipe diameter of the inclined distributing pipe 11-1 in the second feeding distributor 11 is smaller than the pipe diameter of the horizontal distributing pipe 7-1 in the first feeding distributor 7.
Compared with the prior art, the utility model has the following beneficial effects:
the mode of feeding the crystal transfer agent by the central stirring shaft is adopted, and a crystal transfer agent feeding port is not required to be additionally added, so that the structure of the jacket heating type hydrothermal reaction kettle is simplified; the stirring shaft is utilized to drive the feeding distributor to rotate together, and the crystal-transferring agent is uniformly put into the gypsum slurry in the kettle under the combined action of the pressure input by the crystal-transferring agent inlet, the pressure difference formed by stirring slurry and the centrifugal force formed by rotation; meanwhile, the action force is large, so that the phenomenon of pipeline blockage caused by gypsum crystallization is not easy to occur. After entering the kettle body, the crystal transformation agent directly enters the stirring core area and is uniformly distributed in the slurry under the action of the double-layer stirring paddles, so that the mixing effect is good, and the production efficiency and the product quality of the reaction kettle are improved.
The above description of the specific embodiments of the present utility model has been given by way of example only, and the present utility model is not limited to the above described specific embodiments. Accordingly, equivalent changes and modifications are intended to be included within the scope of the present utility model without departing from the spirit and scope thereof.

Claims (10)

1. The utility model provides a hydrothermal reaction kettle with high strength gypsum crystal transition agent charging means, its characterized in that, hydrothermal reaction kettle include the cauldron body with set up in the agitating unit in cauldron body axle center, wherein:
the upper part of the kettle body is provided with a reaction kettle inlet, and the bottom end of the kettle body is provided with a reaction kettle outlet;
the stirring device comprises a hollow stirring shaft, the upper end of the stirring shaft penetrates through the top end of the kettle body and is connected with a driving device arranged above the kettle body, the top end of the stirring shaft is a crystal transition agent inlet, the lower part of the stirring shaft is connected with a double-layer stirring paddle, a first feeding distributor communicated with the stirring shaft is arranged between the double-layer stirring paddles, the first feeding distributor comprises a plurality of layers of horizontal distribution pipes which are vertically arranged on the stirring shaft, and the tail end of each horizontal distribution pipe is a crystal transition agent outlet.
2. The hydrothermal reaction kettle of claim 1, wherein the driving device comprises a frame above the kettle body, a speed reducer and a motor, and the stirring shaft penetrates through the frame and is connected with the motor through the speed reducer.
3. The hydrothermal reaction kettle of claim 1, wherein the blades of the double-layer stirring paddle are selected from one of a pitched blade stirring paddle, a propeller stirring paddle, and a turbine stirring paddle.
4. The hydrothermal reaction kettle according to claim 1, wherein the horizontal distribution pipes of each layer in the first feeding distributor are uniformly and symmetrically distributed with the stirring shaft as an axis, and the number of the horizontal distribution pipes of each layer is 2-6.
5. The hydrothermal reaction kettle of claim 1, wherein the length of the horizontal distribution pipe is 1/2-2/3 of the radius of the double-layer stirring paddle.
6. The hydrothermal reaction kettle according to claim 5, wherein the number of layers of the horizontal distribution pipes in the first feeding distributor is set to 2 to 5, and the length of each horizontal distribution pipe is gradually increased from top to bottom.
7. The hydrothermal reaction kettle of claim 1, wherein the pipe diameter of the horizontal distribution pipe in the first feed distributor gradually increases from top to bottom; and the tail end outlet of the horizontal distribution pipe is provided with an inclined pipe orifice, and the included angle between the inclined pipe orifice and the central axis of the horizontal distribution pipe is 45-60 degrees.
8. The hydrothermal reaction kettle according to claim 1, wherein a second feeding distributor communicated with the stirring shaft is arranged above the double-layer stirring paddle on the stirring shaft, and the second feeding distributor comprises a plurality of layers of inclined distributing pipes with downward outlets.
9. The hydrothermal reaction kettle of claim 8, wherein the inclined distribution pipes in the second feed distributor have an included angle of 30 ° to 45 ° with the stirring shaft, and each layer of inclined distribution pipes has the same included angle with the stirring shaft.
10. The hydrothermal reaction kettle of claim 8, wherein the pipe diameter of the inclined distribution pipe in the second feed distributor is smaller than the pipe diameter of the horizontal distribution pipe in the first feed distributor.
CN202320291936.9U 2023-02-23 2023-02-23 Hydrothermal reaction kettle with high-strength gypsum crystal transition agent feeder Active CN219252592U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320291936.9U CN219252592U (en) 2023-02-23 2023-02-23 Hydrothermal reaction kettle with high-strength gypsum crystal transition agent feeder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320291936.9U CN219252592U (en) 2023-02-23 2023-02-23 Hydrothermal reaction kettle with high-strength gypsum crystal transition agent feeder

Publications (1)

Publication Number Publication Date
CN219252592U true CN219252592U (en) 2023-06-27

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