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CN-122015446-A - Drying mechanism for preparing alpha-type high-strength gypsum

CN122015446ACN 122015446 ACN122015446 ACN 122015446ACN-122015446-A

Abstract

The invention provides a drying mechanism for preparing alpha-type high-strength gypsum, which comprises an air outlet component, wherein the air outlet component is communicated with a stirring crushing component through a heating component, the top of the stirring crushing component is connected with a vertical drying shell, a discharging pipe orifice at the top of the drying shell is connected with a receiving component, a feeding shell is arranged on the stirring crushing component, and the feeding shell is externally connected with a spiral feeding structure. The pretreatment structure is arranged in the stirring and crushing assembly, the wet filter cake conveyed by the feeding shell is firstly flattened, and then crushing and stirring are carried out. The rolling process can increase the specific surface area of the materials, reduce the block strength, squeeze out part of free water and improve the crushing efficiency and the drying speed. Spreading the wet material into thin layer, increasing specific surface area, reducing block strength, rapidly deagglomerating and dispersing in stirring and crushing, extruding part of free water, reducing drying load, accelerating water migration and evaporation, and improving flash drying efficiency and uniformity of finished product.

Inventors

  • TANG WEI
  • ZHANG JING

Assignees

  • 一夫科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260105

Claims (10)

  1. 1. Be used for alpha gypsum preparation drying mechanism that excels in, including air-out subassembly (1), air-out subassembly (1) are connected with stirring broken subassembly through heating element (2), stirring broken subassembly's top is connected with along drying shell (4) of vertical setting, drying shell (4) are connected with receiving material subassembly through ejection of compact mouth of pipe (41) on its top outer wall, be provided with feeding shell (5) on the stirring broken subassembly, feeding shell (5) external spiral feeding structure, its characterized in that: the inside of stirring crushing subassembly is provided with pretreatment structure, pretreatment structure rolls out the material that gets into stirring crushing subassembly inside by feed shell (5), and the material that is rolled out is broken, stirs.
  2. 2. The drying mechanism for preparing alpha-high-strength gypsum according to claim 1, wherein the air outlet assembly (1) comprises a fan (12), the fan (12) is connected with the heating assembly (2) through an air guiding shell (13), the heating assembly (2) comprises a mounting shell (21), a heating unit (23) is arranged inside the mounting shell (21), and the fan (12) is connected with the mounting shell (21) through the air guiding shell (13); the air flow generated by the fan (12) passes through the heating unit (23) and then enters the stirring and crushing assembly through the connecting shell (22).
  3. 3. The drying mechanism for preparing alpha-high-strength gypsum according to claim 1, wherein the stirring and crushing assembly comprises a flat cylindrical stirring shell (3), the joint of the stirring shell (3) and the heating assembly (2) is distributed along the tangential direction of the stirring shell (3), a stirring unit is arranged in the bottom area of an inner cavity of the stirring shell (3), a drying shell (4) is fixed at the center of the top of the stirring shell (3), the drying shell (4) is cylindrical, and the stirring unit stirs and crushes materials flattened by the pretreatment structure.
  4. 4. The drying mechanism for preparing alpha-type high-strength gypsum according to claim 3, wherein the stirring unit comprises a driving piece (33), the driving piece (33) is fixed on a bracket (31) at the bottom of the stirring shell (3), a driving rod (34) is fixed on the output end at the top of the driving piece (33), the driving rod (34) penetrates through the side wall at the bottom of the stirring shell (3), and a first stirring blade (35) and a second stirring blade (36) are fixed on the surface of the driving rod (34).
  5. 5. The drying mechanism for preparing alpha-high-strength gypsum according to claim 3, wherein the pretreatment structure is positioned at the bottom of the feeding shell (5) and is connected to the top of the stirring unit, and rotates synchronously with the stirring unit; The pretreatment structure is a first pretreatment component (6) or a second pretreatment component (7).
  6. 6. The drying mechanism for preparing alpha-type high-strength gypsum according to claim 5, wherein the first pretreatment assembly (6) comprises a first transmission rod (61), the first transmission rod (61) is vertically fixed at the top of the driving rod (34), at least one flattening part is fixed on the surface of the first transmission rod (61), and the flattening part rotates along with the first transmission rod (61) and passes through the receiving plate (63).
  7. 7. The drying mechanism for preparing alpha-high-strength gypsum according to claim 6, wherein the flattening-out part comprises a grinding unit (64) and a scraping unit (65), wherein the grinding unit (64) and the scraping unit (65) are fixed on a first transmission rod (61) through a first connecting rod (62); The autorotation material grinding unit (64) and the material scraping unit (65) sequentially pass through the top side wall and the bottom side wall of the material receiving plate (63).
  8. 8. The drying mechanism for preparing alpha-high-strength gypsum according to claim 7, wherein the material grinding unit (64) comprises two material grinding plates (642) symmetrically arranged by taking the material receiving plate (63) as a symmetrical plane, the two material grinding plates (642) are fixedly connected through a first connecting frame (641), the two material grinding plates (642) respectively pass through the bottom and the bottom of the material receiving plate (63), and when passing through the material receiving plate (63), a space is always reserved between the material grinding plates (642) and the outer wall of the material receiving plate (63).
  9. 9. The drying mechanism for preparing alpha-high-strength gypsum according to claim 7, wherein the scraping unit (65) comprises two bearing plates (652) symmetrically arranged by taking the receiving plate (63) as a symmetry plane, scraping plates (653) are rotatably connected to opposite side end surfaces of the two bearing plates (652), and coil springs are arranged at the rotary connection positions of the scraping plates (653) and the bearing plates (652); The two scraping plates rotate in the process of passing through the top and the bottom of the receiving plate (63) and are always lapped on the outer wall of the receiving plate (63), and the two bearing plates (652) are fixedly connected with each other through a second connecting frame (651); the thickness of the receiving plate (63) gradually increases along the rotation direction of the stirring part.
  10. 10. The drying mechanism for preparing alpha-type high-strength gypsum according to claim 5, wherein the second pretreatment assembly (7) comprises an outer casing (71) and an inner casing (74) which are coaxially arranged, the outer casing (71) and the inner casing (74) are annular or not completely annular, the outer casing (71) is sleeved and fixed on the inner wall of the drying casing (4), the inner casing (74) is fixed on a second transmission rod (72) through at least two second connecting rods (73), and the second transmission rod (72) is vertically fixed on the top of the driving rod (34); The pretreatment cavity is arranged at the bottom of the feeding shell (5), at least one pushing unit (75) is arranged in the pretreatment cavity, and the pushing unit (75), the inner sleeve shell (74) and the driving rod (34) rotate synchronously.

Description

Drying mechanism for preparing alpha-type high-strength gypsum Technical Field The invention relates to the field of alpha-type high-strength gypsum preparation, in particular to a drying mechanism for alpha-type high-strength gypsum preparation. Background In the field of gypsum material preparation, alpha-type high-strength gypsum is widely applied to the fields of new building materials, precision casting, medical models, decorative components and the like due to complete crystal structure, high strength and good dimensional stability. In industrial production, a hydrothermal method or a pressurized conversion method is often adopted to prepare alpha-hemihydrate gypsum crystals, and then solid-liquid separation is carried out to form a filter cake-shaped wet material. The filter cake has the characteristics of high water content, compact structure, coexistence of free water and pore water in the interior and the like, and if the filter cake directly enters a drying link, the filter cake is easy to show the problems of large water content, strong agglomeration, difficult breakage of an integral block structure and the like in the initial stage of drying. In order to improve the production efficiency, the alpha-type high-strength gypsum filter cake is often matched with air flow drying or flash evaporation drying equipment to carry out rapid dehydration treatment. The flash dryer fully contacts wet materials through high-speed hot air flow, realizes transient heat and mass transfer, has the advantages of high drying speed, small occupied space, suitability for continuous treatment of powder materials and the like, and has been widely applied to the fields of gypsum and powder materials. However, in actual working conditions, because the filter cake still keeps a blocky or agglomerated state when entering the drying equipment, internal moisture is difficult to migrate to the surface in a short time, so that the material has large crushing resistance and low agglomeration decomposition efficiency in the initial stage of drying, wet blocks are difficult to fully contact with hot air flow, drying is uneven, the local area moisture evaporation path is long, evaporation load is concentrated, and large particles or wet agglomerates can be retained or brought into a subsequent grading section. The factors not only influence the stirring crushing and dispersing effects, but also reduce the heat and mass transfer efficiency of the flash evaporation drying stage, so that the drying period is prolonged, the energy consumption is increased, and the problems of incomplete drying or fluctuation of the water content of the product are easy to occur. Under the background, the pretreatment mode of the filter cake-shaped alpha-type high-strength gypsum before entering the flash evaporation drying airflow field is necessarily improved, so that the material structure is more beneficial to subsequent crushing dispersion and moisture migration, and the overall drying efficiency and the quality stability of a finished product are improved. Accordingly, a drying mechanism for the preparation of alpha-form high-strength gypsum is provided for the above-mentioned problems. Disclosure of Invention The invention provides a preparation drying mechanism for alpha-type high-strength gypsum, which aims to solve the problems of high water content, compact agglomeration, difficult crushing and dispersion and low drying efficiency of filter cake-shaped alpha-type high-strength gypsum in the initial stage of flash evaporation drying. The invention solves the technical problems by the following technical proposal: The invention provides a drying mechanism for preparing alpha-type high-strength gypsum, which comprises an air outlet assembly, wherein the air outlet assembly is connected and communicated with a stirring and crushing assembly through a heating assembly, the top of the stirring and crushing assembly is connected with a drying shell arranged vertically, the drying shell is connected with a receiving assembly through a discharging pipe orifice on the outer wall of the top of the drying shell, a feeding shell is arranged on the stirring and crushing assembly, and the feeding shell is externally connected with a spiral feeding structure; The inside of stirring broken subassembly is provided with pretreatment structure, and pretreatment structure rolls out the material that gets into the inside of stirring broken subassembly by the feed shell, and the material that is rolled out is broken, stirs. The material inside the stirring crushing assembly is crushed through the flattening-out of the feeding shell of the pretreatment structure, so that the wet material is flattened first, and can be crushed and stirred more rapidly. Meanwhile, a part of free water can be directly extruded in the flattening process, so that the drying efficiency is improved. In the technical scheme, the air outlet assembly comprises a fan, the fan is connected wit