Vertical gypsum autoclave drying and crystal transforming kettle

Abstract

The application provides a vertical gypsum autoclaving drying crystal transformation kettle and belongs to the technical field of drying crystal transformation kettles. The vertical gypsum autoclaving drying crystal transformation kettle comprises a kettle body, a center pipe for assisting unloading is arranged at the center of the inner cavity of the kettle body, a steam inlet assembly is arranged above the kettle body, a heat exchange assembly is arranged in the inner cavity of the kettle body, a steam outlet is fixedly connected to one side of the top of the kettle body, and a jacket assembly is arranged below the kettle body. In the application, the center pipe for assisting unloading in the kettle body is used for assisting unloading and steam passing, small round holes with equal intervals are formed on the surface of the center pipe, steam in the kettle body can uniformly supply steam from top to bottom through the small round holes during the autoclaving process, the crystal transformation effect is improved, the heat insulation heat exchange pipe arranged in the kettle body insulates the cooling of cold air outside the kettle from the materials in the kettle, the heat exchange area in the kettle is increased, the overall heat intensity of drying in the kettle is improved, the drying time is shortened, and the equipment capacity is improved.

Description

Technical Field

[0001] This application relates to the field of drying and crystallization kettle technology, and more specifically, to a vertical gypsum autoclaving drying and crystallization kettle. Background Technology

[0002] The vertical gypsum autoclaving and drying conversion kettle allows natural gypsum ore or industrial by-product gypsum to be loaded into the kettle through the top opening. Saturated steam at a certain pressure is then introduced into the kettle cavity through the steam inlet. The material inside the kettle comes into full contact with the steam for heat exchange, placing the material under a certain pressure and temperature. The gypsum raw material inside the kettle is transformed from dihydrate calcium sulfate to hemihydrate calcium sulfate, and the crystal morphology changes from the original irregular shape to fibrous, short columnar, and other crystal forms of α-type high-strength gypsum. After the conversion is completed, high-pressure steam is introduced into the drying heat exchange tubes and insulation heat exchange tubes inside the kettle to dry the water adhering to the surface of the converted α-type high-strength gypsum. The dried α-type high-strength gypsum is discharged by gravity through the lower kettle door.

[0003] Since the vertical crystallizer relies on the material's own gravity for unloading, especially for lumpy natural gypsum with a particle size of 3-10cm, the crystallization and drying cycle takes about 16-20 hours. The long-term accumulation of lumpy materials can easily lead to material expansion due to interaction between them. Opening the lower crystallizer door may result in incomplete or no discharge, affecting the work process. Utility Model Content

[0004] To overcome the above shortcomings, this application provides a vertical gypsum autoclaving and drying crystallization kettle, which aims to improve the problems of long-term accumulation of lumpy materials, easy interaction between materials leading to expansion, and the possibility of incomplete or no discharge when opening the lower crystallization kettle door, thus affecting the work process.

[0005] This application provides a vertical gypsum autoclaving drying and crystallization reactor, including a reactor body, an auxiliary unloading central pipe at the center of the reactor body's inner cavity, a steam inlet assembly at the top of the reactor body, a heat exchange assembly in the inner cavity of the reactor body, a steam exhaust port fixedly connected to one side of the top of the reactor body, a jacket assembly at the bottom of the reactor body, a hydrophobic assembly at the bottom of the reactor body, and a pressure measuring assembly on the surface of the reactor body.

[0006] In one specific implementation, the top of the vessel is provided with an upper vessel door, the bottom of the vessel is provided with a lower vessel door, and a support is fixedly connected to the surface of the vessel.

[0007] In the above process, the upper and lower valves are used for feeding and discharging materials, respectively, and the support serves to support the vessel body.

[0008] In one specific implementation, both the upper and lower reactor doors adopt a large-opening quick-opening flange structure and are opened and closed by a hydraulic device. A compressed air sealing device is installed on the quick-opening flange to seal the reactor door, thereby realizing automatic control of the opening and closing of the reactor.

[0009] In the above process, both the upper and lower kettle doors are equipped with hydraulic quick-opening devices, which realizes the automation of kettle production.

[0010] In one specific implementation, the surface of the unloading center tube is provided with equally spaced small round holes, and a lifting device for lifting the unloading center tube is provided above the vessel body.

[0011] In the above process, the external lifting device is used to control the height of the auxiliary unloading center tube. When the auxiliary unloading center tube is lifted, a gap appears in the center of the reactor, and the expanded material will be broken, thus achieving unloading. At the same time, the surface of the auxiliary unloading center tube has small round holes with equal spacing. During the autoclaving process, the steam in the reactor can be evenly supplied from top to bottom through the small round holes, which improves the crystallization effect.

[0012] In one specific implementation, the steam inlet assembly includes a pipeline steam inlet and an inlet steam inlet inside the vessel, both of which are fixedly connected to the surface of the vessel body.

[0013] In the above process, the pipeline steam inlet and the vessel steam inlet are used to supply steam to the inner wall insulated heat exchange tube and the vessel drying heat exchange tube, respectively.

[0014] In one specific implementation, the heat exchange assembly includes an in-vessel drying heat exchange tube and an inner wall insulation heat exchange tube. The in-vessel drying heat exchange tube is disposed in the inner cavity of the vessel body, and the inner wall insulation heat exchange tube is disposed in the inner wall of the vessel body. Both the in-vessel drying heat exchange tube and the inner wall insulation heat exchange tube are arranged in a ring shape.

[0015] In the above process, during the crystallization process of introducing low-pressure steam into the reactor body, steam at the same pressure can be introduced into the heat exchange tubes on the inner wall, making the internal temperature of the reactor body more uniform, avoiding crystallization differences caused by uneven temperature, and increasing the drying heat exchange area, reducing the impact of heat dissipation from the outer wall of the reactor on drying.

[0016] In one specific implementation, the jacket assembly includes a hydrophobic heat-insulating jacket and a lower cover heat-insulating jacket, wherein the hydrophobic heat-insulating jacket is disposed on the lower surface of the vessel body, and the lower cover heat-insulating jacket is disposed on the surface of the lower vessel door.

[0017] In the above process, the jacket is connected to the drying pipeline network, and the internal steam pressure is the same as that of the drying pipeline network. It can serve the function of drying and heat insulation. At the same time, the condensate after heat exchange between the drying heat exchange tubes in the upper vessel and the heat exchange tubes on the inner wall enters the lower jacket under the action of gravity and is quickly discharged through the jacket drain port set on the jacket.

[0018] In one specific implementation, the hydrophobic component includes an inlet condensate drain and a jacket condensate drain. The inlet condensate drain is located on the surface of the lower cover heat insulation jacket, and the jacket condensate drain is fixedly connected to the surface of the lower cover heat insulation jacket.

[0019] In the above process, the drain outlet inside the vessel and the drain outlet in the jacket are used to drain the condensate in the lower cover insulation jacket and the hydrophobic insulation heat exchange jacket, respectively.

[0020] In one specific implementation, the pressure measuring component includes an internal pressure measuring port and a jacketed pressure measuring port, wherein the internal pressure measuring port is located at the center of the surface of the vessel, and the jacketed pressure measuring port is located below the surface of the vessel.

[0021] In the above process, both the pressure measuring port inside the autoclave and the pressure measuring port in the jacket are pressure gauge measurement interfaces, enabling online temperature control of the gypsum steam pressing and drying process.

[0022] In one specific implementation, the steam inlet of the pipeline is fixedly connected to the upper end of the inner wall insulated heat exchange tube, the pressure measuring port inside the vessel is fixedly connected to the surface of the inner wall insulated heat exchange tube, the steam inlet inside the vessel is fixedly connected to the upper end of the drying heat exchange tube inside the vessel, the hydrophobic insulated heat exchange jacket is fixedly connected to the lower end of the drying heat exchange tube inside the vessel, the lower end of the hydrophobic insulated heat exchange jacket is fixedly connected to the jacket drain port, and the pressure measuring port of the jacket is fixedly connected to the surface of the hydrophobic insulated heat exchange jacket.

[0023] In the above process, the condensate after the steam in the heat exchange tube is discharged through the drain port on the jacket. The lower cover heat insulation jacket on the surface of the lower vessel door is mainly a pressure-bearing jacket with a cone shape on the lower cover. When the lower cover is closed, the lower cover heat insulation jacket can play the role of heat insulation and material isolation, reducing the heat dissipation caused by the large opening of the lower cover, which leads to the phenomenon that the material at the bottom of the vessel cannot reach the crystallization temperature and cannot be dried.

[0024] Compared with the prior art, the beneficial effects of this application are as follows:

[0025] 1. The auxiliary unloading center tube inside the reactor is used to assist unloading and steam supply. During the process of slowly lifting the auxiliary unloading center tube by the lifting device set outside the reactor, a gap appears in the center of the reactor, and the expanded material will be broken, thus achieving unloading. At the same time, the surface of the auxiliary unloading center tube has small round holes with equal spacing. During the steam pressing process, the steam inside the reactor can be evenly supplied from top to bottom through the small round holes, which improves the crystallization effect.

[0026] Second, the insulated heat exchange tubes installed inside the reactor not only isolate the material inside from the cooling effect of cold air outside the reactor, but also increase the heat exchange area inside the reactor, improve the overall heat intensity of drying inside the reactor, shorten the drying time, and increase the equipment capacity. At the same time, during the gypsum crystallization and drying process, steam at different pressures is introduced into the insulated heat exchange tubes, making the temperature of the gypsum inside the reactor more stable during the crystallization and drying process, and making the gypsum crystallization more uniform. Through the arrangement of the insulated heat exchange tubes, the temperature of the gypsum inside the reactor is more stable throughout the crystallization and drying process, the crystallization effect is better, and the drying time is faster. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a vertical gypsum autoclave drying and crystallization reactor provided in the embodiments of this application;

[0029] Figure 2 A bottom view of a vertical gypsum autoclave drying and crystallization reactor provided for the embodiments of this application;

[0030] Figure 3 A schematic diagram of the unloading center tube structure provided for an embodiment of this application.

[0031] In the diagram: 1. Vessel body; 101. Upper vessel door; 102. Lower vessel door; 103. Support; 2. Central unloading tube; 3. Steam inlet assembly; 301. Pipeline steam inlet; 302. Vessel steam inlet; 4. Heat exchange assembly; 401. Vessel drying heat exchange tube; 402. Inner wall insulated heat exchange tube; 5. Exhaust port; 6. Jacket assembly; 601. Drainage and insulation heat exchange jacket; 602. Lower cover insulation jacket; 7. Drainage assembly; 701. Vessel drain port; 702. Jacket drain port; 8. Pressure measuring assembly; 801. Vessel pressure measuring port; 802. Jacket pressure measuring port. Detailed Implementation

[0032] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0033] Please see Figure 1 , Figure 2 and Figure 3This application provides a vertical gypsum autoclaving drying and crystallization kettle, including a kettle body 1, an auxiliary unloading center pipe 2 at the center of the inner cavity of the kettle body 1, a steam inlet assembly 3 at the top of the kettle body 1, a heat exchange assembly 4 in the inner cavity of the kettle body 1, a steam exhaust port 5 fixedly connected to one side of the top of the kettle body 1, a jacket assembly 6 at the bottom of the kettle body 1, a hydrophobic assembly 7 at the bottom of the kettle body 1, and a pressure measuring assembly 8 on the surface of the kettle body 1.

[0034] In the specific setup, the top of the vessel body 1 is provided with an upper vessel door 101, the bottom of the vessel body 1 is provided with a lower vessel door 102, and a support 103 is fixedly connected to the surface of the vessel body 1. The upper vessel door 101 and the lower vessel door 102 are used for feeding and discharging materials, respectively, and the support 103 serves to support the vessel body 1.

[0035] In the specific setup, both the upper vessel door 101 and the lower vessel door 102 adopt a large-opening quick-opening flange structure and are opened and closed by hydraulic devices. A compressed air sealing device is installed on the quick-opening flange to seal the crystal transfer vessel door, realizing automatic control of the opening and closing of the crystal transfer vessel. Both the upper vessel door 101 and the lower vessel door 102 adopt hydraulic quick-opening devices, realizing the automation of the production of vessel body 1.

[0036] In the specific setup, the surface of the unloading center tube 2 is provided with small round holes at equal intervals, and a lifting device is provided on the outside of the vessel body 1 to lift the unloading center tube 2. The external lifting device is used to control the height of the unloading center tube 2. When the unloading center tube 2 is lifted, a gap appears in the center of the vessel body 1, the expanded material will be broken, and the unloading will be achieved. At the same time, the surface of the unloading center tube 2 is provided with small round holes at equal intervals. During the steam pressing process, the steam in the vessel body 1 can be uniformly supplied from top to bottom through the small round holes, which improves the crystallization effect.

[0037] In a specific configuration, the steam inlet assembly 3 includes a pipeline steam inlet 301 and an inlet steam inlet 302. Both the pipeline steam inlet 301 and the inlet steam inlet 302 are fixedly connected to the surface of the vessel body 1. The pipeline steam inlet 301 and the inlet steam inlet 302 are used to deliver steam to the inner wall heat exchange tube 402 and the inlet drying heat exchange tube 401, respectively.

[0038] In a specific configuration, the heat exchange assembly 4 includes an in-vessel drying heat exchange tube 401 and an inner wall insulation heat exchange tube 402. The in-vessel drying heat exchange tube 401 is disposed in the inner cavity of the vessel body 1, and the inner wall insulation heat exchange tube 402 is disposed in the inner wall of the vessel body 1. Both the in-vessel drying heat exchange tube 401 and the inner wall insulation heat exchange tube 402 are arranged in a ring shape. During the process of low-pressure steam crystallization in the vessel body 1, steam at the same pressure can be introduced into the inner wall insulation heat exchange tube 402 to make the internal temperature of the vessel body 1 more uniform and avoid uneven temperature leading to… The difference in crystallization can increase the drying heat exchange area and reduce the impact of heat dissipation from the outer wall of the reactor on drying. The surface of the α-type high-strength gypsum after crystallization usually contains a certain amount of attached water. After the material in the reactor 1 completes the crystallization, it is necessary to keep the material at a high temperature so that the attached water in the material can be heated and evaporated to achieve the purpose of drying. The drying heat exchange tube 401 in the reactor and the heat exchange tube 402 on the inner wall together ensure the heat exchange intensity in the reactor 1, which can quickly dry the attached water on the surface of the crystallized material. The steam generated is discharged from the exhaust port 5.

[0039] In specific configuration, the jacket assembly 6 includes a hydrophobic heat exchange jacket 601 and a lower cover heat exchange jacket 602. The hydrophobic heat exchange jacket 601 is located on the lower surface of the vessel body 1, and the lower cover heat exchange jacket 602 is located on the surface of the lower vessel door 102. The jacket is connected to the drying pipeline network, and the internal steam pressure is the same as that of the drying pipeline network. It can serve both drying and heat insulation purposes. At the same time, the condensate after heat exchange between the upper vessel drying heat exchange tube 401 and the inner wall heat exchange tube 402 enters the lower jacket under the action of gravity. The condensate is quickly discharged through the jacket drain port 702 provided on the jacket. Since the vessel drying heat exchange tube 401 and the inner wall heat exchange tube 402 provided in the vessel body 1 are composed of heat exchange tubes with multiple independent drain ports, if the lower jacket is not provided, the connection of the lower drain pipeline network is more complicated, occupies a large space in the lower vessel body 1, and is prone to blockage of materials discharged by gravity, thereby affecting the discharge effect.

[0040] In a specific configuration, the hydrophobic assembly 7 includes an internal hydrophobic port 701 and a jacket hydrophobic port 702. The internal hydrophobic port 701 is located on the surface of the lower cover heat insulation jacket 602, and the jacket hydrophobic port 702 is fixedly connected to the surface of the lower cover heat insulation jacket 602. The internal hydrophobic port 701 and the jacket hydrophobic port 702 are used to drain the condensate in the lower cover heat insulation jacket 602 and the hydrophobic heat exchange jacket 601, respectively.

[0041] In a specific configuration, the pressure measuring component 8 includes an internal pressure measuring port 801 and a jacketed pressure measuring port 802. The internal pressure measuring port 801 is located at the center of the surface of the vessel body 1, and the jacketed pressure measuring port 802 is located below the surface of the vessel body 1. Both the internal pressure measuring port 801 and the jacketed pressure measuring port 802 are pressure gauge measurement interfaces, enabling online temperature control during the gypsum steam pressing and drying process.

[0042] In the specific setup, the steam inlet 301 is fixedly connected to the upper end of the inner wall insulated heat exchange tube 402; the pressure measuring port 801 inside the vessel is fixedly connected to the surface of the inner wall insulated heat exchange tube 402; the steam inlet 302 inside the vessel is fixedly connected to the upper end of the drying heat exchange tube 401 inside the vessel; the hydrophobic insulated heat exchange jacket 601 is fixedly connected to the lower end of the drying heat exchange tube 401 inside the vessel; the lower end of the hydrophobic insulated heat exchange jacket 601 is fixedly connected to the jacket drain port 702; and the pressure measuring port... The surface of the 802 is fixedly connected to the hydrophobic heat exchange jacket 601. The condensate after the steam heat exchange in the heat exchange tube is discharged through the condensate outlet on the jacket. The lower cover heat insulation jacket 602 on the surface of the lower vessel door 102 is mainly a cone-shaped pressure-bearing jacket on the lower cover. When the lower cover is closed, the lower cover heat insulation jacket 602 can play the role of heat insulation and material isolation, reducing the heat dissipation of the lower cover when the door is open, which causes the material at the bottom of the vessel 1 to not reach the crystallization temperature and not dry.

[0043] The working principle of this vertical gypsum autoclave drying and crystallization reactor is as follows: Both the upper reactor door 101 and the lower reactor door 102 adopt a large-opening quick-opening flange structure and are opened and closed by hydraulic devices. A compressed air sealing device is installed on the quick-opening flange to seal the reactor door, realizing automatic control of the opening and closing of the reactor body 1. During the crystallization process of low-pressure steam being introduced into the reactor body 1, steam at the same pressure can be introduced into the inner wall insulated heat exchange tube 402, making the internal temperature of the reactor body 1 more uniform and avoiding crystallization differences caused by uneven temperature. Secondly, it increases the drying heat exchange area and reduces the impact of heat dissipation from the outer wall of the reactor on drying. The drying heat exchange tube 401 and the inner wall insulated heat exchange tube 402 together ensure the heat exchange intensity within the reactor body 1, enabling rapid drying of the adhering water on the surface of the crystallization material. The steam generated during the drying process is discharged through the exhaust port 5. The auxiliary unloading center tube 2 is used to assist in unloading and steam supply. During the process of slowly lifting the auxiliary unloading center tube 2 by the lifting device set outside the vessel body 1, a gap appears in the center of the vessel body 1, and the expanded material will be broken, thus achieving unloading. At the same time, the surface of the auxiliary unloading center tube 2 has small round holes with equal spacing. During the steam pressure process, the steam in the vessel body 1 can be evenly supplied from top to bottom through the small round holes, which improves the crystallization effect. The lower cover heat insulation jacket 602 set on the surface of the lower vessel door 102 is mainly a cone-shaped pressure-bearing jacket set on the lower cover. When the lower cover is closed, the lower cover heat insulation jacket 602 can play the role of heat insulation and material isolation, reducing the heat dissipation of the lower cover when the door is opened, which causes the material at the bottom of the vessel body 1 to not reach the crystallization temperature and not dry.

[0044] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A vertical gypsum autoclaving drying and crystallization kettle, characterized in that, The vessel includes a vessel body (1), an auxiliary unloading center pipe (2) is provided at the center of the inner cavity of the vessel body (1), a steam inlet assembly (3) is provided above the vessel body (1), a heat exchange assembly (4) is provided in the inner cavity of the vessel body (1), a steam outlet (5) is fixedly connected to one side of the top of the vessel body (1), a jacket assembly (6) is provided below the vessel body (1), a hydrophobic assembly (7) is provided at the bottom of the vessel body (1), and a pressure measuring assembly (8) is provided on the surface of the vessel body (1). The heat exchange assembly (4) includes an in-vessel drying heat exchange tube (401) and an inner wall insulation heat exchange tube (402). The in-vessel drying heat exchange tube (401) is disposed in the inner cavity of the vessel body (1), and the inner wall insulation heat exchange tube (402) is disposed in the inner wall of the vessel body (1). Both the in-vessel drying heat exchange tube (401) and the inner wall insulation heat exchange tube (402) are arranged in a ring shape.

2. The vertical gypsum autoclaving drying and crystallization kettle according to claim 1, characterized in that, The top of the vessel body (1) is provided with an upper vessel door (101), the bottom of the vessel body (1) is provided with a lower vessel door (102), and a support (103) is fixedly connected to the surface of the vessel body (1).

3. A vertical gypsum autoclaving drying and crystallization kettle according to claim 2, characterized in that, Both the upper reactor door (101) and the lower reactor door (102) adopt a large-opening quick-opening flange structure and are opened and closed by a hydraulic device. A compressed air sealing device is installed on the quick-opening flange to seal the reactor door, thereby realizing automatic control of the opening and closing of the reactor.

4. A vertical gypsum autoclaving drying and crystallization kettle according to claim 1, characterized in that, The surface of the unloading center tube (2) is provided with small round holes at equal intervals, and a lifting device for lifting the unloading center tube (2) is provided on the outside of the vessel body (1).

5. A vertical gypsum autoclaving drying and crystallization kettle according to claim 1, characterized in that, The steam inlet assembly (3) includes a pipeline steam inlet (301) and an inlet steam inlet (302), both of which are fixedly connected to the surface of the vessel body (1).

6. A vertical gypsum autoclaving drying and crystallization kettle according to claim 5, characterized in that, The jacket assembly (6) includes a hydrophobic heat insulation jacket (601) and a lower cover heat insulation jacket (602). The hydrophobic heat insulation jacket (601) is disposed on the lower surface of the vessel body (1), and the lower cover heat insulation jacket (602) is disposed on the surface of the lower vessel door (102).

7. A vertical gypsum autoclaving drying and crystallization kettle according to claim 6, characterized in that, The hydrophobic component (7) includes an inlet condensate drain (701) and a jacket condensate drain (702). The inlet condensate drain (701) is located on the surface of the lower cover heat insulation jacket (602), and the jacket condensate drain (702) is fixedly connected to the surface of the lower cover heat insulation jacket (602).

8. A vertical gypsum autoclave drying and crystallization reactor according to claim 7, characterized in that, The pressure measuring component (8) includes an in-vessel pressure measuring port (801) and a jacket pressure measuring port (802). The in-vessel pressure measuring port (801) is located at the center of the surface of the vessel body (1), and the jacket pressure measuring port (802) is located below the surface of the vessel body (1).

9. A vertical gypsum autoclaving drying and crystallization kettle according to claim 8, characterized in that, The steam inlet (301) of the pipeline is fixedly connected to the upper end of the inner wall heat exchange tube (402), the pressure measuring port (801) inside the vessel is fixedly connected to the surface of the inner wall heat exchange tube (402), the steam inlet (302) inside the vessel is fixedly connected to the upper end of the drying heat exchange tube (401) inside the vessel, the hydrophobic heat exchange jacket (601) is fixedly connected to the lower end of the drying heat exchange tube (401) inside the vessel, the lower end of the hydrophobic heat exchange jacket (601) is fixedly connected to the jacket drain port (702), and the pressure measuring port (802) of the jacket is fixedly connected to the surface of the hydrophobic heat exchange jacket (601).

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