Alpha-type high-strength gypsum preparation equipment and preparation method thereof

Abstract

The application belongs to the field of gypsum processing, and provides a high-strength gypsum preparation device and a preparation method thereof, which comprises a crystal transformation module, a separation module and a drying module. The separation module separates the type hemihydrate gypsum on the filter cloth through a vacuum adsorption assembly. The filter cloth continuously runs along a closed loop under the action of a driving part. The upward section is used for filtering operation, and the downward section is provided with a cleaning mechanism. The cleaning mechanism tensions the filter cloth to form a cleaning cavity. Pre-washing, flushing and rinsing assemblies are sequentially arranged in the cavity, so that the filter cloth is cleaned in stages during operation, thereby effectively removing impurities on the surface of the filter cloth, keeping the filtering performance stable, improving the solid-liquid separation efficiency, reducing the water content of the separated material, reducing the drying load and energy consumption, and overall improving the preparation efficiency of the high-strength gypsum and the stability of the finished product quality.

Description

Technical Field

[0001] This invention relates to In the field of high-strength gypsum preparation equipment and preparation methods, specifically... High-strength gypsum preparation equipment and its preparation method. Background Technology

[0002] High-strength gypsum is a type of plaster made from... This inorganic cementitious material, with calcium sulfate hemihydrate as its main component, possesses advantages such as dense crystals, high strength, low water demand, and good molding performance. It is widely used in building decoration products, industrial molds, and precision components. In existing technologies, High-strength gypsum is usually prepared by hydrothermal method, and its basic process includes crystal transformation, solid-liquid separation and drying.

[0003] During the crystal transformation stage, the calcium sulfate raw material undergoes a crystal transformation under hydrothermal conditions of certain temperature and pressure, resulting in... Hemihydrate gypsum crystals are formed, creating a crystallization slurry containing a large number of solid crystals. Subsequently, a solid-liquid separation process is needed to separate the liquid and solid phases in the slurry, yielding a product containing hemihydrate gypsum crystals. The material is a solid material mainly composed of hemihydrate gypsum; finally, the solid material is dried to obtain a stable product. High-strength gypsum finished products.

[0004] In the above process flow, solid-liquid separation is a crucial step connecting the crystallization and drying processes, and its separation effect directly affects the subsequent drying load, energy consumption level, and final product quality. Existing... In high-strength gypsum production lines, solid-liquid separation equipment typically employs a vacuum belt filter, which uses filter cloth under vacuum negative pressure to achieve continuous filtration and dehydration of the crystallization slurry.

[0005] However, due to The fine, regularly shaped crystals of hemihydrate gypsum easily accumulate on the surface and within the pores of filter cloth. During the separation process, the crystallization slurry can easily cause partial clogging of the filter cloth, increase filtration resistance, and consequently lead to decreased filtration efficiency and unstable dewatering effects. To ensure continuous production, existing technologies generally involve simple rinsing or a single cleaning method for the filter cloth. However, this method often fails to completely remove fine particles and impurities adhering to the surface of the filter cloth, resulting in limited restoration of the filter cloth's pore permeability. After long-term operation, filtration performance is still prone to decline.

[0006] Insufficient filter cloth cleaning not only reduces the efficiency and reliability of the solid-liquid separation stage, but also leads to higher and uneven moisture content in the separated solid material, thereby increasing energy consumption and processing time in subsequent drying processes, and affecting... The overall continuity and production efficiency of the preparation process of high-strength gypsum. Therefore, targeting The characteristics of the high-strength gypsum slurry in the separation stage, and how to improve the cleaning effect of the filter cloth and maintain its stable filtration performance, have become urgent technical problems to be solved in the existing technology. Summary of the Invention

[0007] This invention aims to solve the existing problems. In the preparation of high-strength gypsum, insufficient cleaning of the filter cloth during the solid-liquid separation stage of the crystallization slurry leads to decreased filtration efficiency, unstable dehydration, and increased subsequent drying load. Therefore, [the following is provided:] High-strength gypsum preparation equipment and its preparation method.

[0008] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0009] This invention provides High-strength gypsum preparation equipment, including equipment for preparing... High-strength gypsum crystallization module, separation module and drying module;

[0010] The crystal conversion module is used to convert calcium sulfate raw materials into calcium sulfate under hydrothermal conditions. Type hemihydrate gypsum crystals;

[0011] The separation module is used for solid-liquid separation of the slurry after crystallization to obtain a product containing... Solid material of hemihydrate gypsum;

[0012] The drying module is used to dry solid materials to obtain... High-strength gypsum finished products;

[0013] The separation module adsorbs substances located on the filter cloth via a vacuum adsorption component. The free water in the hemihydrate gypsum crystals is filtered by the filter cloth, which runs continuously along a closed loop under the action of the drive unit. The upper section of the filter cloth is used to carry the material and complete the filtration operation, and a cleaning mechanism is provided at the lower section.

[0014] The cleaning mechanism is used to tension the filter cloth, so that the filter cloth forms a cleaning chamber. Inside the cleaning chamber, along the direction of filter cloth movement, there are pre-washing components, rinsing components and rinsing components arranged in sequence. During the operation of the filter cloth, the filter cloth goes through the pre-washing, rinsing and rinsing processes in sequence, and the filter cloth is treated in a staged cleaning manner, thereby improving the cleaning effect of the filter cloth and ensuring the stability of its filtration performance.

[0015] In this technical solution, the separation module includes a frame, with drive rollers installed on both sides of the top of the frame. A ring-shaped sealing tape is wound around the two drive rollers, and a filter cloth is wound on the sealing tape. The filter cloth passes through the surface of multiple mounting rollers and the cleaning mechanism in sequence, and is tensioned to form an upward section at the top of the drive rollers and a downward section at the bottom of the drive rollers. The filter cloth is tensioned on the surface of the sealing tape, and the mounting rollers are installed on the frame.

[0016] The cleaning mechanism is located in the downward section, and the suction port of the vacuum adsorption component is located at the bottom of the upward section. A discharge shell is located on one side of the top of the upward section, and the discharge shell is connected to the feeding component. The feeding component will... The hemihydrate gypsum crystals are drawn to the discharge shell and then pass through the flared discharge shell to the surface of the upper section of the filter cloth. A baffle plate is set on the top of the filter cloth on one side of the discharge shell. The filter cloth moves from one side of the baffle plate to one side of the discharge shell, and the discharge port of the discharge shell is set towards one side of the baffle plate. The baffle plate is installed on the frame.

[0017] In this technical solution, the vacuum adsorption assembly includes at least one drain tank, which is provided with a connecting pipe connected to a vacuum pump. The drain tank is also provided with a liquid guide pipe and a drain port for discharging liquid. The end of the liquid guide pipe is connected to a main liquid collection pipe, which is provided with multiple liquid collection branch pipes. The ends of the liquid collection branch pipes are all connected to the outer wall of the vacuum box and communicate with the inner cavity of the vacuum box.

[0018] The vacuum box is pressed against the sealing tape and mounted on the frame.

[0019] In this technical solution, the drive unit includes a drive motor and a reducer. The drive motor is fixed on the frame and is connected to one of the transmission rollers through the reducer.

[0020] The drive motor drives the transmission roller connected to it to rotate through the reducer, thereby driving the sealing belt to rotate, and the rotating sealing belt drives the filter cloth to move.

[0021] In this technical solution, the cleaning mechanism includes multiple support rollers, which are divided into two groups. The filter cloth passes through the two groups of support rollers in sequence to form a cleaning cavity. The top of the cleaning cavity is an isosceles trapezoidal structure with the short side facing up, the middle area is a rectangular structure, and the bottom is an isosceles trapezoidal structure with the short side facing down.

[0022] The pre-wash component and the rinsing component are respectively located on the two symmetrical waist sides of the isosceles trapezoidal structure at the top of the cleaning chamber, and the rinsing component is located on one of the vertical sides of the rectangular structure of the cleaning chamber.

[0023] The two ends of the support roller are respectively mounted on two support frames, which are fixed to the machine frame.

[0024] In this technical solution, the pre-washing component is located outside the cleaning chamber, meaning its direct pre-washing surface is the filter cloth and... The contact end face of the hemihydrate gypsum crystals, the rinsing assembly and the washing assembly are located inside the cleaning chamber, that is, the rinsing assembly and the washing assembly clean the other side of the filter cloth;

[0025] The direction from the pre-wash component to the rinsing component is the direction of filter cloth movement, that is, the pre-wash component is located at the filter cloth inlet end of the entire cleaning chamber.

[0026] In this technical solution, the pre-washing component includes a first connecting shell, which is disposed on one side of the filter cloth and mounted on the support frame by a connecting rod. The top of the vertical outer wall of the first connecting shell near the filter cloth is provided with a long strip-shaped liquid outlet groove, and a guide plate is provided at the bottom of the liquid outlet groove.

[0027] The guide plate is fixed on the outer wall of the first connecting shell, and the area where the guide plate connects with the first connecting shell is a downwardly inclined plate, and the end of the guide plate is bent downward to form an arc plate;

[0028] The end of the guide plate is located at the top of the filter cloth that is inclined to one side.

[0029] Clean water is pumped into the first connecting shell by a water pump or gravity. The water first fills the bottom of the first connecting shell. As the water level rises inside the first connecting shell, the water overflows the outlet channel and flows onto the guide plate, forming a thin water film. This thin water film then flows onto the inclined surface formed by the filter cloth, thus effectively cleaning the filter. The filter cloth from which the solid material of hemihydrate gypsum has just been separated is pre-cleaned.

[0030] Since the thin water film flows on the inclined filter cloth, the clean water forming the thin water film can prolong its time on the continuously moving filter cloth surface, improving the pre-washing effect and loosening impurities on the filter cloth surface.

[0031] The formation of a thin water film does not require a large amount of water or a power source.

[0032] In this technical solution, the rinsing assembly includes a second connecting shell. Multiple rinsing nozzles are fixed on the surface of the second connecting shell near the filter cloth at equal intervals. The second connecting shell is fixed to the support frame by rods.

[0033] Clean water is pumped into the second connecting housing by a water pump. After being distributed inside the second connecting housing, the clean water is sprayed out by the rinsing nozzles installed thereon, and acts directionally on the surface of the filter cloth, from the back of the filter cloth (i.e., not in contact with the filter cloth). The filter cloth is rinsed on the side that is in contact with the solid material of hemihydrate gypsum.

[0034] In this technical solution, the rinsing assembly includes a third connecting shell, which is disposed on the inner side of the top of the cleaning chamber. The top of the vertical outer wall of the third connecting shell near the filter cloth is fixed with an upwardly inclined liquid outlet guide shell, which is flat and elongated and located near the filter cloth.

[0035] Water is pumped into the third connecting shell. Once the water fills the inner cavity of the third connecting shell, it enters the liquid outlet guide shell. The water entering the guide shell forms a flat water curtain that flows obliquely upwards to the surface of the filter cloth. Most of the cleaning water passes through the inclined filter cloth and flows slowly on the inclined filter cloth to rinse the washed filter cloth.

[0036] Preferably, two symmetrically arranged guide plates are fixed in the inner cavity of the liquid outlet guide shell, and the two guide plates are inclined towards the water outlet of the liquid outlet guide shell to form an "eight" shape.

[0037] After water enters the liquid outlet guide shell, the space shrinks as it flows to the two guide plates. After passing through the two guide plates, the space expands again, thus creating kinetic energy that can penetrate the filter cloth without excessively impacting it.

[0038] In this technical solution, a liquid guiding component is provided at the top of the middle area of ​​the cleaning chamber. The liquid guiding component collects the water flowing out of the pre-washing component, rinsing component and rinsing component and directs it to the waste liquid utilization component. The waste liquid utilization component collects the wastewater and guides it to the filter cloth distributed in the horizontal direction, that is, to the filter cloth at the bottom of the cleaning chamber, and the water is guided from one side to the other side in the width direction of the filter cloth.

[0039] By introducing the waste liquid collected during the cleaning process into the siltation area of ​​the filter cloth, the waste liquid acts in a directed manner on the impurities accumulated in that area, thereby rinsing the impurities a second time and removing them from the surface of the filter cloth.

[0040] In this technical solution, the liquid guiding component includes two symmetrically arranged liquid collecting shells, which are respectively located on both sides of the cleaning chamber. The liquid collecting shells are located close to the filter cloth and at the bottom of the rinsing component. A guide shell is provided at the bottom between the two liquid collecting shells. The top of the guide shell overlaps with the bottom of the liquid collecting shell. A waste liquid utilization component is provided at the bottom of the guide shell.

[0041] Both the guide shell and the liquid collection shell are fixed to the support frame by rods.

[0042] In this technical solution, the waste liquid utilization component includes a rinsing shell, which is a double water storage chamber container structure that can be rotated around the bearing horizontal axis. Limiting horizontal bars are provided on both sides of the bottom of the rinsing shell, and liquid guiding plates are provided at the bottom of the two limiting horizontal bars, which are inclined towards the center of the filter cloth width direction.

[0043] One of the water storage chambers in the rinsing shell is always located below the water outlet at the bottom of the guide shell, and the water outlet at the bottom of the guide shell is located at the center of the filter cloth width direction.

[0044] Wastewater from the pre-washing, rinsing, and bleaching components is collected by the liquid collection shell. The wastewater is guided into the guide shell by the liquid collection shell, and then flows through the outlet at the bottom of the guide shell to the water storage chamber on the side of the rinsing shell that does not overlap with the limit crossbar. As more and more water accumulates in the corresponding water storage chamber, the gravity of the water in the water storage chamber causes the rinsing shell to rotate to its side, thereby causing the water inside to pour into the surface of the bottom guide shell and be flushed onto the filter cloth under the guidance of the guide shell.

[0045] The method for preparing high-strength gypsum is as follows:

[0046] Step 1: Feed the calcium sulfate-containing raw material into the crystal transformation module and perform crystal transformation treatment on the calcium sulfate-containing raw material under hydrothermal conditions to cause it to undergo a crystal transformation and generate calcium sulfate. Type hemihydrate gypsum crystals, thus obtaining a mixture containing Crystallization slurry for hemihydrate gypsum crystals;

[0047] Step 2: The crystallization slurry is transported to the separation module, where solid-liquid separation is performed to remove the liquid phase component, obtaining a product containing... Solid material of hemihydrate gypsum crystals;

[0048] Step 3: Feed the solid material into the drying module for drying to remove residual moisture. The hemihydrate gypsum crystals exist stably, thus obtaining High-strength gypsum finished products.

[0049] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0050] The positive and progressive effects of this invention are as follows:

[0051] By sequentially arranging a pre-washing component, a rinsing component, and a rinsing component inside the cleaning chamber, the filter cloth undergoes a phased cleaning process during operation, following the sequence of pre-washing, rinsing, and rinsing. This effectively removes impurities adhering to the surface of the filter cloth. It removes fine particles and impurities from hemihydrate gypsum, maintains the permeability of the filter cloth pores and stable filtration performance, thereby significantly improving the efficiency and reliability of solid-liquid separation in the separation process.

[0052] Thorough and systematic cleaning of the filter cloth can reduce the risk of filter cloth clogging and increased filtration resistance, ensuring more stable dehydration of the crystallization slurry during separation. This results in lower moisture content and more uniform distribution of the obtained solid material, thereby reducing the load on subsequent drying processes, shortening drying time, reducing energy consumption, and improving overall performance. The continuity, production efficiency, and stability of finished product quality in the preparation process of high-strength gypsum. Attached Figure Description

[0053] Figure 1 This is a schematic diagram of the overall structure of the separation module of the present invention;

[0054] Figure 2 For the present invention Figure 1 A structural diagram from another perspective;

[0055] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at point L;

[0056] Figure 4 For the present invention Figure 1 A top-view structural diagram;

[0057] Figure 5 For the present invention Figure 4 Schematic diagram of the cross-sectional structure at point AA;

[0058] Figure 6 This is a schematic diagram of the cleaning mechanism of the present invention;

[0059] Figure 7 For the present invention Figure 6 A top-view structural diagram;

[0060] Figure 8 For the present invention Figure 7 A schematic diagram of the planar structure at section BB;

[0061] Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structure at point I;

[0062] Figure 10 For the present invention Figure 7 A three-dimensional structural diagram of the cross-section at point BB;

[0063] Figure 11 For the present invention Figure 10 A magnified schematic diagram of the structure at point J;

[0064] Figure 12 For the present invention Figure 10 A magnified schematic diagram of the structure at point K;

[0065] Figure 13 This is a schematic diagram showing the planar positional relationship of the pre-washing component, rinsing component, rinsing component, liquid guiding component, and waste liquid utilization component of the present invention.

[0066] Figure 14 This is a schematic diagram showing the three-dimensional positional relationship of the pre-washing component, rinsing component, rinsing component, liquid guiding component, and waste liquid utilization component of the present invention.

[0067] Figure 15 For the present invention Figure 13 A schematic diagram of the side view structure;

[0068] Figure 16 This is a schematic diagram of the waste liquid utilization component.

[0069] Figure 17 This is a schematic diagram of the installation structure of the waste liquid utilization component.

[0070] Explanation of reference numerals in the attached figures

[0071] 1. Frame; 11. Discharge shell; 12. Drive roller; 13. Sealing belt; 131. Skirt; 14. Baffle plate; 15. Mounting roller; 16. Drain tank; 161. Connecting pipe; 162. Liquid guide pipe; 163. Main liquid collection pipe; 164. Sub-liquid collection pipe; 165. Vacuum box; 166. Drain interface; 17. Drive unit; 18. Connecting support; 181. Threaded rod; 182. Handwheel; 19. Filter cloth;

[0072] 2. Support roller; 21. Connecting shaft;

[0073] 3. Support rod; 31. Bushing;

[0074] 4. Reinforcing rod; 41. Mounting rod;

[0075] 5. Pre-wash assembly; 51. First connecting shell; 52. Guide plate; 53. Dropper; 54. Liquid outlet channel;

[0076] 6. Flushing assembly; 61. Second connecting housing; 62. Flushing nozzle;

[0077] 7. Rinsing assembly; 71. Third connecting shell; 72. Liquid outlet guide shell; 73. Guide ramp;

[0078] 8. Liquid guiding assembly; 81. Guide shell; 82. Liquid collecting shell;

[0079] 9. Waste liquid utilization component; 91. Flushing shell; 911. Water storage chamber; 92. Liquid guide plate; 93. Limiting crossbar; 94. Bearing crossbar; 95. Mounting frame; 96. Fixing rod;

[0080] a. Cleaning organizations. Detailed Implementation

[0081] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0082] like Figure 1 and Figure 2 As shown, High-strength gypsum preparation equipment, including equipment for preparing... High-strength gypsum crystallization module, separation module and drying module;

[0083] The crystal conversion module is used to convert calcium sulfate raw materials into calcium sulfate under hydrothermal conditions. Type hemihydrate gypsum crystals;

[0084] The separation module is used for solid-liquid separation of the slurry after crystallization to obtain a product containing... Solid material of hemihydrate gypsum;

[0085] The drying module is used to dry solid materials to obtain... High-strength gypsum finished products;

[0086] The separation module adsorbs the filter cloth 19 through a vacuum adsorption component. The free water in the hemihydrate gypsum crystals is filtered by the filter cloth 19, which runs continuously along a closed loop under the action of the drive unit 17. The upper section of the filter cloth 19 is used to carry the material and complete the filtration operation, and a cleaning mechanism a is provided in the lower section.

[0087] The cleaning mechanism a is used to tension the filter cloth 19, so that the filter cloth 19 forms a cleaning cavity. The cleaning cavity is provided with a pre-washing component 5, a rinsing component 6 and a rinsing component 7 in sequence along the moving direction of the filter cloth 19. During the operation of the filter cloth 19, the filter cloth 19 goes through the pre-washing, rinsing and rinsing processes in sequence. The filter cloth 19 is treated in a staged cleaning manner, thereby improving the cleaning effect of the filter cloth 19 and ensuring the stability of its filtration performance.

[0088] Example 1

[0089] In this embodiment, the separation module includes a frame 1, with drive rollers 12 installed on the top two sides of the frame 1 respectively. A ring-shaped closed tape 13 is wound around the two drive rollers 12, and a filter cloth 19 is wound around the closed tape 13. The filter cloth 19 passes through the surface of multiple mounting rollers 15 and the cleaning mechanism a in sequence, and is tensioned to form an upper section at the top of the drive rollers 12 and a lower section at the bottom of the drive rollers 12. The filter cloth 19 is tensioned on the surface of the closed tape 13, and the mounting rollers 15 are mounted on the frame 1.

[0090] Cleaning mechanism a is located in the downward section. The suction port of the vacuum adsorption component is located at the bottom of the upward section. A discharge shell 11 is located on one side of the top of the upward section. The discharge shell 11 is connected to the feeding component, which will... The hemihydrate gypsum crystals are drawn to the discharge shell 11 and then pass through the flared discharge shell 11 to the upper section surface of the filter cloth 19. A baffle plate 14 is provided on the top of the filter cloth 19 on one side of the discharge shell 11. The filter cloth 19 moves from one side of the baffle plate 14 to one side of the discharge shell 11, and the discharge port of the discharge shell 11 is set towards one side of the baffle plate 14. The baffle plate 14 is installed on the frame 1.

[0091] The vacuum adsorption assembly includes at least one drain tank 16. The drain tank 16 is provided with a connecting pipe 161 connected to a vacuum pump. The drain tank 16 is also provided with a liquid guide pipe 162 and a liquid discharge port 166 for discharging liquid. The end of the liquid guide pipe 162 is connected to a main liquid collection pipe 163. The main liquid collection pipe 163 is provided with multiple liquid collection branch pipes 164. The ends of the liquid collection branch pipes 164 are all connected to the outer wall of the vacuum box 165 and communicate with the inner cavity of the vacuum box 165.

[0092] Free water is drawn into the drain tank 16 by a vacuum pump.

[0093] The vacuum box 165 rests against the sealing tape and is mounted on the frame 1.

[0094] The drive unit 17 includes a drive motor and a reducer. The drive motor is fixed on the frame 1 and is connected to one of the transmission rollers 12 through the reducer.

[0095] The drive motor drives the transmission roller 12 connected to it to rotate through the reducer, thereby driving the sealing belt 13 to rotate, and the rotating sealing belt drives the filter cloth 19 to move.

[0096] The transmission roller 12, which is not connected to the drive unit 17, is mounted on the frame 1 on both sides via connecting supports 18. The connecting supports 18 are directly slidably connected to the frame 1. A self-rotating threaded rod 181 is provided on the connecting support 18. The threaded rod 181 passes through the side wall of the frame 1 and a handwheel 182 is fixed at its end. The threaded rod 181 is connected to the frame 1 via a thread.

[0097] The handwheel 182 drives the threaded rod 181 to rotate. The rotating threaded rod 181 drives the connecting support 18 to move under the push of the thread, thereby adjusting the position of the corresponding transmission roller 12, thereby tensioning the sealing tape 13 and the filter cloth 19.

[0098] Example 2

[0099] like Figure 8 As shown, the cleaning mechanism a includes multiple support rollers 2, which are divided into two groups. The filter cloth 19 passes through the two groups of support rollers 2 in sequence to form a cleaning cavity. The top of the cleaning cavity is an isosceles trapezoidal structure with the short side on top, the middle area is a rectangular structure, and the bottom is an isosceles trapezoidal structure with the short side on the bottom.

[0100] The pre-wash component 5 and the rinsing component 7 are respectively located at the two symmetrical waist sides of the isosceles trapezoidal structure at the top of the cleaning chamber, and the rinsing component 6 is located at one of the vertical sides of the rectangular structure of the cleaning chamber.

[0101] The two ends of the support roller 2 are respectively installed on two support frames, which are fixed on the frame 1.

[0102] The top of the cleaning chamber is an isosceles trapezoidal structure with the short side at the top, meaning its top is narrow and its cross-section increases towards the bottom. The filter cloth 19 is distributed obliquely to both sides until it extends to the rectangular structure area in the middle. The filter cloth 19 in the rectangular structure area is arranged vertically. The bottom of the cleaning chamber is an isosceles trapezoidal structure with the short side at the bottom, meaning that the cross-sectional area of ​​the cleaning chamber gradually decreases from the rectangular structure area to the bottom of the isosceles trapezoidal structure. The filter cloth 19 at the bottom of the cleaning chamber is distributed horizontally.

[0103] Specifically, the number of support rollers 2 in a set is preferably 4, and the rectangular structure is formed by the support of four support rollers 2.

[0104] The filter cloth 19 located at the short side of the isosceles trapezoidal structure at the bottom of the cleaning chamber is set as an impurity carrying area, which is used to temporarily accumulate and collect some of the impurities washed off the surface of the filter cloth 19, so that the impurities are concentrated and retained in this area and can be easily removed uniformly.

[0105] By setting the aforementioned impurity collection area at the bottom of the cleaning chamber, the re-attachment and backflow of impurities in other operating sections of the filter cloth 19 can be reduced, thus reducing interference with the cleaning water flow. This is beneficial to improving the stability and effectiveness of the cleaning process and further enhancing the overall cleaning effect of the filter cloth 19.

[0106] The pre-washing component 5 is located outside the cleaning chamber, meaning its direct pre-washing surface is the filter cloth 19 and... The contact end face of the hemihydrate gypsum crystal, the rinsing component 6 and the rinsing component 7 are located inside the cleaning chamber, that is, the rinsing component 6 and the rinsing component 7 clean the other side of the filter cloth 19.

[0107] The direction from the pre-wash assembly 5 to the rinsing assembly 7 is the direction of movement of the filter cloth 19, that is, the pre-wash assembly 5 is located at the inlet end of the filter cloth 19 in the entire cleaning chamber, and... The filter cloth 19 for solid material separation of hemihydrate gypsum passes sequentially through the pre-washing assembly 5, the rinsing assembly 6, and the rinsing assembly 7.

[0108] like Figure 11 As shown, the pre-washing assembly 5 includes a first connecting shell 51, which is disposed on one side of the filter cloth 19 and mounted on the support frame via a connecting rod. A long strip-shaped liquid outlet groove 54 is provided on the top of the vertical outer wall of the first connecting shell 51 near the filter cloth 19, and a guide plate 52 is provided at the bottom of the liquid outlet groove 54.

[0109] The guide plate 52 is fixed on the outer wall of the first connecting shell 51, and the area where the guide plate 52 is connected to the first connecting shell 51 is inclined downwards. The end of the guide plate 52 is bent downwards to form an arc plate.

[0110] The end of the guide plate 52 is located at the top of the filter cloth 19 that is inclined to one side.

[0111] Clean water is pumped into the first connecting shell 51 by a water pump or gravity. The clean water initially accumulates at the bottom of the first connecting shell 51. As the water level inside the first connecting shell 51 gradually rises, the clean water overflows the outlet channel 54 and flows towards the guide plate 52. Under the guiding action of the guide plate 52, a continuous and uniform thin water film is formed. After flowing along the guide plate 52, the thin water film covers and acts on the inclined area surrounded by the filter cloth 19, thereby cleaning the surface of the filter cloth. The filter cloth 19, from which the hemihydrate gypsum solid material has been separated, undergoes pre-cleaning treatment.

[0112] As the cleaning water spreads along the surface of the inclined filter cloth 19 in the form of a thin water film and flows continuously in the direction of operation of the filter cloth 19, the effective contact time between the cleaning water and the filter cloth 19 is significantly extended. This is beneficial for fully wetting and loosening the fine particles and residual impurities attached to the surface of the filter cloth 19, creating favorable conditions for subsequent rinsing and washing processes, thereby improving the overall cleaning effect of the filter cloth 19.

[0113] Meanwhile, the formation of the thin water film mainly relies on water level overflow and gravity guidance, without the need to provide a large water volume or high water pressure. It can achieve a stable pre-washing function under low power consumption conditions, which is conducive to reducing cleaning water consumption and system energy consumption, and improving the economy and applicability of equipment operation.

[0114] Multiple equally spaced drip tubes 53 are provided on the bottom side wall of the first housing. When there is not much residue on the filter cloth 19 or the filter cloth 19 moves slowly, the amount of water pumped into the first connecting shell 51 can be reduced so that it does not overflow the liquid outlet channel 54. Through gravity, the cleaning water drops fall onto the filter cloth 19 to achieve the effect of pre-washing.

[0115] The rinsing assembly 6 includes a second connecting shell 61. Multiple rinsing nozzles 62 are fixed on the side surface of the second connecting shell 61 near the filter cloth 19. The second connecting shell 61 is fixed to the support frame by rods.

[0116] Clean water is pumped into the second connecting housing 61 by a water pump. After being distributed inside the second connecting housing 61, the clean water is sprayed out by the rinsing nozzle 62 installed thereon, and acts in a directional manner on the surface of the filter cloth 19, from the back of the filter cloth 19 (i.e., not in contact with the back of the filter cloth 19). The filter cloth 19 is rinsed on the side that is in contact with the solid material of hemihydrate gypsum.

[0117] In the rinsing process, the filter cloth 19 located in the rinsing area is arranged vertically, so that the sprayed cleaning water washes the surface of the filter cloth 19 from top to bottom under the action of gravity. This helps to enhance the water flow's ability to peel off and carry away residual particles and adhering impurities in the pores of the filter cloth 19, and avoids secondary retention of impurities on the surface of the filter cloth 19, thereby significantly improving rinsing efficiency and rinsing thoroughness. At the same time, the vertically arranged structure of the filter cloth 19 helps to quickly discharge the rinsing water, reducing water accumulation and avoiding adverse effects on subsequent rinsing and the return operation of the filter cloth 19.

[0118] The rinsing component 6 is located on one side of the pre-wash component 5 or on one side of the rinsing component 7, preferably on one side of the rinsing component 7.

[0119] like Figure 9 As shown, the rinsing assembly 7 includes a third connecting shell 71, which is disposed on the inner side of the top of the cleaning chamber. A liquid outlet guide shell 72 is fixed on the top of the vertical outer wall of the third connecting shell 71 near the filter cloth 19. The liquid outlet guide shell 72 is a flat strip and is located near the filter cloth 19.

[0120] Clean water is pumped into the interior of the third connecting shell 71. After the clean water gradually fills the inner cavity of the third connecting shell 71, it enters the liquid outlet guide shell 72 through the connecting structure. The clean water entering the liquid outlet guide shell 72 is shaped into a continuous and uniform flat water curtain under the guidance. The water curtain acts on the surface of the filter cloth 19 in an oblique upward flow manner.

[0121] During the rinsing process, the water curtain comes into contact with the inclined filter cloth 19. Most of the cleaning water passes through the filter cloth 19 and is discharged along its back side, while the remaining cleaning water spreads and flows slowly across the surface of the inclined filter cloth 19, thus further rinsing the filter cloth 19 after the previous rinsing. By combining a flat water curtain with an upward-sloping, slow flow, uniform coverage and gentle cleaning of the filter cloth 19 can be achieved under relatively low water pressure, avoiding impact damage to the filter cloth 19. At the same time, it effectively removes residual fine impurities and cleaning solution, improving the rinsing effect and reducing the overall water consumption.

[0122] Preferably, two symmetrically arranged guide plates 73 are fixed in the inner cavity of the liquid outlet guide shell 72, and the two guide plates 73 are inclined towards the water outlet of the liquid outlet guide shell 72 to form an "eight" shape.

[0123] After water enters the liquid outlet guide shell 72, the space decreases as it flows to the two guide inclined plates 73. After passing through the two guide inclined plates 73, the space increases again, thus better generating kinetic energy that can penetrate the filter cloth 19 without excessively impacting the filter cloth 19.

[0124] After the clean water enters the liquid outlet guide shell 72, when it flows to the two guide inclined plates 73, the flow space gradually narrows, so that the water flow is compressed in this area and obtains the corresponding flow velocity and kinetic energy. After the clean water flows through the two guide inclined plates 73, the flow space widens again, and the water flow is slowed down and expanded, thus forming a stable and uniform liquid outlet state.

[0125] Through the above-mentioned "contraction and expansion" flow guiding structure design, the water flow output by the liquid outlet guide shell 72 has the necessary kinetic energy to penetrate the filter cloth 19, while avoiding excessive water flow velocity that would cause excessive impact on the filter cloth 19. This helps to reduce the risk of wear on the filter cloth 19 structure while ensuring the rinsing effect, and further improves the stability of the cleaning process and the service life of the filter cloth 19.

[0126] A liquid guiding component 8 is provided at the top of the middle area of ​​the cleaning chamber. The liquid guiding component 8 collects the water flowing out of the pre-washing component 5, the rinsing component 6 and the rinsing component 7 and directs it to the waste liquid utilization component 9. The waste liquid utilization component 9 collects the wastewater and guides it to the filter cloth 19 distributed in the horizontal direction, that is, to the filter cloth 19 at the bottom of the cleaning chamber. The water is guided from one side to the other side in the width direction of the filter cloth 19.

[0127] By introducing the waste liquid collected during the cleaning process into the siltation area of ​​the filter cloth 19, the waste liquid acts in a directed manner on the impurities accumulated in the area, thereby rinsing the impurities a second time and removing them from the surface of the filter cloth 19.

[0128] Using the collected waste liquid to rinse the silted area of ​​filter cloth 19 can effectively remove concentrated impurities without adding extra fresh water, avoiding the long-term retention of impurities that would affect the operation and cleaning effect of filter cloth 19. This is beneficial to improving water resource utilization and reducing the overall cleaning water consumption, thereby enhancing the economy and sustainability of the cleaning system.

[0129] like Figure 13 and Figure 14 As shown, the liquid guiding assembly 8 includes two symmetrically arranged liquid collecting shells 82, and the two liquid collecting shells 82 are respectively arranged on both sides of the cleaning chamber. The liquid collecting shells 82 are arranged close to the filter cloth 19 and located at the bottom of the rinsing assembly 6. A guide shell 81 is arranged at the bottom between the two liquid collecting shells 82. The top of the guide shell 81 is fixedly connected to the bottom of the liquid collecting shell 82. A waste liquid utilization assembly 9 is arranged at the bottom of the guide shell 81.

[0130] like Figure 6 As shown, both the guide shell 81 and the liquid collection shell 82 are fixed to the support frame by rods.

[0131] The waste liquid utilization component 9 includes a rinsing shell 91, which is a double water storage chamber 911 type container structure that can be flipped around the bearing horizontal axis 94. Limiting horizontal bars 93 are provided on both sides of the bottom of the rinsing shell 91, and liquid guiding plates 92 inclined towards the center of the width direction of the filter cloth 19 are provided at the bottom of the two limiting horizontal bars 93.

[0132] One of the water storage chambers 911 in the rinsing shell 91 is always located below the water outlet at the bottom of the guide shell 81, and the water outlet at the bottom of the guide shell 81 is located at the center of the filter cloth 19 in the width direction.

[0133] Wastewater from the pre-washing assembly 5, rinsing assembly 6, and rinsing assembly 7 is collected by a collection shell 82. The wastewater, guided by the collection shell 82, enters the guide shell 81 and flows through the outlet at the bottom of the guide shell 81 into a water storage chamber 911 located on one side of the rinsing shell 91 and not overlapping with the limiting crossbar 93. As wastewater gradually accumulates in the water storage chamber 911, its volume and weight increase, driving the rinsing shell 91 to rotate around its supporting part to the corresponding side under gravity. This causes the wastewater inside the rinsing shell 91 to be poured onto the surface of the guide shell 81 below, and then acts on the filter cloth 19 under the guidance of the guide shell 81, thus rinsing the filter cloth 19.

[0134] After the flushing shell 91 completes its rotation, the water storage chamber 911, which was originally empty on the other side, switches to the area below the outlet of the guide shell 81 and begins to receive the subsequently discharged wastewater to enter the next cycle of water storage and flushing. Through the above-mentioned alternating water storage and rotation flushing method, periodic flushing can be achieved by utilizing the gravity of the wastewater itself without the need for additional power, which helps to reduce system energy consumption and improve wastewater utilization efficiency.

[0135] Furthermore, since the rinsing shell 91 is located in the middle region of the filter cloth 19 along its width, and the rinsing shell 91 itself has a certain length along the width of the filter cloth 19, the guide shells 81 located on both sides of the rinsing shell 91 correspond to the two sides of the filter cloth 19 along its width. When wastewater flows through the guide shells 81 to the filter cloth 19, the water flow spreads laterally from one side to the other along the width of the filter cloth 19, thereby achieving alternating changes in the rinsing direction in different rinsing cycles. This structure can prevent the water flow from concentrating in the same direction or the same area for a long time, which is beneficial to improving the uniformity of cleaning coverage, reducing the residue of impurities in local areas of the filter cloth 19, and further improving the overall rinsing effect and the stability of the filter cloth 19 in use.

[0136] like Figure 16 As shown, the outer contour of the flushing shell 91 is composed of two interconnected triangles, and a water storage cavity 911 is provided in each of the two triangular areas. A sleeve is fixed at the bottom center of the flushing shell 91, and the sleeve is sleeved on the bearing horizontal shaft 94 and can rotate stably on the bearing horizontal shaft 94.

[0137] There is always a triangular area whose bottom sidewall overlaps the surface of the limiting crossbar 93 on the same side bottom, and the water storage chamber 911 on the other triangular area is located below the water outlet at the bottom of the guide shell 81.

[0138] like Figure 17 As shown, both the load-bearing crossbar and the limiting crossbar 93 are fixed on the rectangular mounting frame 95, and the mounting frame 95 is fixed on the support frame by the fixing rod 96.

[0139] like Figure 6 As shown, the support frame includes multiple bushings 31. The bushings 31 are sleeved on the surface of the connecting shaft 21 at the end of the corresponding support roller 2. Two adjacent bushings 31 are fixedly connected by support rods 3. Reinforcing rods 4 are connected between the support rods 3. The support rods 3 or reinforcing rods 4 are fixed on the frame 1 by mounting rods 41, thereby fixing the entire support frame to achieve the purpose of fixing the cleaning mechanism a.

[0140] The support roller 2 achieves its rotation by rotating within the bushing 31 via the connecting shaft 21 at its end.

[0141] Example 3

[0142] The method for preparing high-strength gypsum is as follows:

[0143] Step 1: Feed the calcium sulfate-containing raw material into the crystal transformation module and perform crystal transformation treatment on the calcium sulfate-containing raw material under hydrothermal conditions to cause it to undergo a crystal transformation and generate calcium sulfate. Type hemihydrate gypsum crystals, thus obtaining a mixture containing Crystallization slurry for hemihydrate gypsum crystals;

[0144] Step 2: The crystallization slurry is transported to the separation module, where solid-liquid separation is performed to remove the liquid phase component, obtaining a product containing... Solid material of hemihydrate gypsum crystals;

[0145] Step 3: Feed the solid material into the drying module for drying to remove residual moisture. The hemihydrate gypsum crystals exist stably, thus obtaining High-strength gypsum finished products.

[0146] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. High-strength gypsum preparation equipment, including equipment for preparing... The crystallization module, separation module, and drying module of high-strength gypsum are characterized by: The separation module adsorbs the filter cloth (19) by a vacuum adsorption component. The free water in the hemihydrate gypsum crystals, the filter cloth (19) runs continuously along the closed loop under the action of the drive unit (17), the upper section of the filter cloth (19) is used to carry the material and complete the filtration operation, and a cleaning mechanism (a) is provided at the lower section. The cleaning mechanism (a) is used to tension the filter cloth (19) so that the filter cloth (19) forms a cleaning cavity. The cleaning cavity is provided with a pre-washing component (5), a rinsing component (6) and a rinsing component (7) in sequence along the moving direction of the filter cloth (19). During the operation of the filter cloth (19), the filter cloth (19) goes through the pre-washing, rinsing and rinsing processes in sequence. The cleaning mechanism (a) includes multiple support rollers (2), which are divided into two groups. The filter cloth (19) passes through the two groups of support rollers (2) in sequence to form a cleaning cavity. The top of the cleaning cavity is an isosceles trapezoidal structure with the short side on top, the middle area is a rectangular structure, and the bottom is an isosceles trapezoidal structure with the short side on the bottom. The pre-wash component (5) and the rinsing component (7) are respectively located at the two symmetrical waist sides of the isosceles trapezoidal structure at the top of the cleaning chamber, and the rinsing component (6) is located at one of the vertical sides of the rectangular structure of the cleaning chamber. The two ends of the support roller (2) are respectively mounted on two bearing frames, which are fixed on the frame (1); The pre-washing assembly (5) includes a first connecting shell (51), which is disposed on one side of the filter cloth (19). The top of the outer wall of the first connecting shell (51) near the filter cloth (19) is provided with a long strip-shaped liquid outlet groove (54), and a guide plate (52) is provided at the bottom of the liquid outlet groove (54). The rinsing assembly (6) includes a second connecting shell (61), on the side surface of the second connecting shell (61) near the filter cloth (19) a plurality of rinsing nozzles (62) are fixed at equal intervals, and the second connecting shell (61) is fixed to the support frame by rods; The rinsing assembly (7) includes a third connecting shell (71), which is located on the inner side of the top of the cleaning chamber. The top of the outer wall of the third connecting shell (71) near the filter cloth (19) is fixed with an upwardly inclined liquid guide shell (72). The liquid guide shell (72) is a flat strip and is located near the filter cloth (19). A liquid guiding component (8) is provided at the top of the middle area of ​​the cleaning chamber. The liquid guiding component (8) collects the water flowing out of the pre-washing component (5), the rinsing component (6) and the rinsing component (7) and directs it to the waste liquid utilization component (9). The waste liquid utilization component (9) collects the wastewater and guides it to the filter cloth (19) distributed in the horizontal direction. The water is guided from one side of the filter cloth (19) to the other side in the width direction.

2. As described in claim 1 High-strength gypsum preparation equipment, characterized in that: The separation module includes a frame (1), on which drive rollers (12) are respectively installed on the top two sides. A ring-shaped closed tape (13) is wound on the two drive rollers (12), and a filter cloth (19) is wound on the closed tape (13). The filter cloth (19) passes through the surface of multiple mounting rollers (15) and the cleaning mechanism (a) in sequence, and is tensioned to form an upward section at the top of the drive rollers (12) and a downward section at the bottom of the drive rollers (12). The filter cloth (19) is tensioned on the surface of the closed tape (13). The suction port of the vacuum adsorption assembly is provided in the area at the bottom of the upper section, and the discharge shell (11) is provided on one side of the top of the upper section. A baffle plate (14) is provided on the top of the filter cloth (19) on one side of the discharge shell (11). The vacuum adsorption assembly includes at least one drain tank (16), which is provided with a connecting pipe (161) connected to a vacuum pump. The drain tank (16) is also provided with a liquid guide pipe (162) and a liquid discharge port (166) for discharging liquid. The end of the liquid guide pipe (162) is connected to a main liquid collection pipe (163). The main liquid collection pipe (163) is provided with multiple liquid collection branch pipes (164). The ends of the liquid collection branch pipes (164) are all connected to the outer wall of the vacuum box (165) and communicate with the inner cavity of the vacuum box (165).

3. As described in claim 1 High-strength gypsum preparation equipment, characterized in that: The liquid guiding assembly (8) includes two symmetrically arranged liquid collecting shells (82), and the two liquid collecting shells (82) are respectively arranged on both sides of the cleaning cavity. A guide shell (81) is provided at the bottom between the two liquid collecting shells (82). The top of the guide shell (81) overlaps with the bottom of the liquid collecting shell (82). A waste liquid utilization assembly (9) is provided at the bottom of the guide shell (81).

4. As described in claim 3 High-strength gypsum preparation equipment, characterized in that: The waste liquid utilization component (9) includes a rinsing shell (91). The rinsing shell (91) is a double water storage chamber (911) type container structure that can be flipped around the bearing horizontal axis (94). Limiting horizontal bars (93) are provided on both sides of the bottom of the rinsing shell (91), and the bottom of the two limiting horizontal bars (93) is provided with a liquid guide plate (92) that is inclined towards the center of the width direction of the filter cloth (19). One of the water storage chambers (911) in the flushing shell (91) is always located below the water outlet at the bottom of the guide shell (81), and the water outlet at the bottom of the guide shell (81) is located at the center of the filter cloth (19) in the width direction.

5. As described in claim 1 High-strength gypsum preparation equipment yields A method for preparing high-strength gypsum, characterized in that: The method steps are as follows: Step 1: Feed the calcium sulfate-containing raw material into the crystal transformation module, and perform crystal transformation treatment on the calcium sulfate-containing raw material under hydrothermal conditions to cause it to undergo a crystal transformation and generate... Type hemihydrate gypsum crystals, thus obtaining a mixture containing Crystallization slurry for hemihydrate gypsum crystals; Step 2: The crystallization slurry is transported to the separation module, where solid-liquid separation is performed to remove the liquid phase component, yielding a product containing... Solid material of hemihydrate gypsum crystals; Step 3: The solid material is fed into the drying module for drying to remove residual moisture. The hemihydrate gypsum crystals exist stably, thus obtaining High-strength gypsum finished products.

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