Process for the production of building gypsum from desulphurization gypsum and apparatus therefor

Abstract

The present application relates to the technical field of building gypsum preparation, and particularly relates to a method and device for preparing building gypsum from desulfurization gypsum, comprising: a working support table; an inclined support frame arranged at the top end of the working support table; a multifunctional processing cylinder assembly fixedly installed at the top end of the inclined support frame through support feet, the multifunctional processing cylinder assembly being provided with a processing cylinder assembly for realizing internal gypsum raw material processing and a material return auxiliary assembly; the multifunctional processing cylinder assembly comprising a support cylinder body fixedly connected with a fixing foot, the inside of the support cylinder body being rotatably sleeved with the processing cylinder assembly for providing a processing environment, and the axial center position of the processing cylinder assembly being provided with the material return auxiliary assembly. The present application can occupy a smaller space compared with existing equipment, and can stably carry out drying, calcination and aging processes, ensure stable and efficient performance of each process, and improve the quality of actual products.

Description

Technical Field

[0001] This invention relates to the field of building gypsum preparation technology, and in particular to a method and apparatus for preparing building gypsum from desulfurized gypsum. Background Technology

[0002] Desulfurized gypsum is a waste product generated during coal-fired power generation and industrial production, containing a large amount of calcium sulfate. Through proper treatment and the preparation of gypsum clinker, desulfurized gypsum can be transformed into building gypsum, thereby effectively realizing resource recycling, reducing environmental impact, and providing building materials needed for construction.

[0003] The process of preparing building gypsum from desulfurized gypsum mainly involves several steps, including drying, calcination, aging, and modification. In existing processes, these steps are mostly distributed within different pieces of equipment, which are often large and have long operating times. Furthermore, the moisture content and viscosity of the desulfurized gypsum itself can cause raw materials to stick together, affecting the stability of the actual processing. Therefore, we propose a method and apparatus for preparing building gypsum from desulfurized gypsum. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a method and apparatus for preparing building gypsum from desulfurized gypsum.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An apparatus for preparing building gypsum from desulfurized gypsum, comprising:

[0007] Work support table;

[0008] An inclined support frame, located at the top of the work support table, is used to provide a slight tilt angle for the working components, facilitating stable processing.

[0009] The multi-functional processing cylinder assembly is fixedly installed on the top of the inclined support frame by support feet. The multi-functional processing cylinder assembly is equipped with a processing cylinder assembly and a return material auxiliary assembly for internal gypsum raw material processing.

[0010] The multi-functional processing cylinder assembly includes a support cylinder body fixedly connected to a fixed foot. A processing cylinder assembly is rotatably sleeved on the inner side of the support cylinder body to provide a processing environment. A return material auxiliary assembly is inserted through the axis of the processing cylinder assembly to adjust the position of the internal gypsum raw materials and achieve a certain mixing effect, facilitating the subsequent addition and mixing of external substances. The multi-functional processing cylinder assembly also includes a drive assembly fixedly installed on the top of the inclined support frame to drive the rotation of the processing cylinder assembly and provide a power basis for the rolling conveying and collision of the internal raw materials.

[0011] The feeding anastomosis piece is fixedly installed at the top end of the inclined support frame through the supporting feet, and comprises an inserting cylinder, the inner side of the inserting cylinder is stepped, one end of the processing cylinder assembly is inserted at the inner side step of the inserting cylinder and is flush with the inner wall, which facilitates the effective transition of the raw materials from the inserting cylinder to the inside of the multifunctional processing cylinder assembly, a raw material adding hopper for adding raw materials, a pressure relief valve for adjusting the internal pressure and a gas pressure sensor for detecting the internal gas pressure are arranged on the inserting cylinder;

[0012] The adjusting assembly is used for cooperating with the movement of the internal components of the multifunctional processing cylinder assembly to realize the working state adjustment of the material returning auxiliary assembly.

[0013] As a preferred technical solution of the present application, the pipe wall of the supporting cylinder is internally provided with a spiral air guide pipe, both ends of the spiral air guide pipe are connected with a gas exchange assembly installed at the top end of the inclined support frame, which is used for conveying the gas for adjusting the temperature in the spiral air guide pipe, so as to realize the temperature adjustment of the internal processing cylinder assembly and provide a proper temperature environment for the subsequent drying, calcination and aging processes in the gypsum preparation process.

[0014] The gas exchange assembly comprises a gas guide box and a gas pump installed at the top end of the inclined support frame, the gas guide box and the gas pump are respectively in communication with both ends of the spiral air guide pipe, the gas guide box is used for connecting external components to realize the pouring of high-temperature gas or low-temperature gas, so as to fill the gas in the spiral air guide pipe and facilitate the temperature adjustment of the processing cylinder assembly, and the gas pump is used for pumping the gas in the spiral air guide pipe to realize the flow of the gas for temperature adjustment and better ensure the uniform adjustment of the air temperature in the processing cylinder assembly.

[0015] As a preferred technical solution of the present application, the processing cylinder assembly comprises a processing cylinder body, a plurality of groups of lengthwise stirring grooves are arranged in the annular array on the inner wall of the processing cylinder body, which are used for driving the gypsum raw materials to stir during the overall rotation of the processing cylinder assembly, so as to provide a power basis for the subsequent mixing, uniform heat exchange and collision of the raw materials.

[0016] Both ends of the outer side of the processing cylinder body are provided with meshing tooth rings, the driving assembly comprises a supporting seat installed at the top end of the inclined support frame, a rotating rod is arranged in the supporting seat, both ends of the rotating rod are provided with meshing gears which are arranged in meshing with the meshing tooth rings on the processing cylinder body, and a mounting plate is installed on one side of the top end of the inclined support frame, a driving motor for driving the rotation of the rotating rod is installed on one side of the mounting plate, so that the rotation of the processing cylinder assembly is stably realized, thereby providing a power basis for each link of the building gypsum production.

[0017] One end of the processing cylinder body is provided with a discharge pipe, and a control valve is arranged on the discharge pipe, which facilitates the discharge of the building gypsum powder material after the completion of the subsequent processing.

[0018] As a preferred technical solution of the present application, the back material auxiliary assembly comprises a back material pipe, one end of the back material pipe is fixedly connected with the inner side of the feeding anastomosis, and a conveying auger for conveying raw materials is rotatably arranged on the inner side of the back material pipe. The top end of the back material pipe is provided with a feeding port away from the side of the feeding anastomosis, and a discharging port is arranged at the bottom end of the side close to the feeding anastomosis. The gypsum raw materials stirred at the end away from the feeding anastomosis inside the processing cylinder assembly can fall into the inside of the back material auxiliary assembly and be gradually conveyed to the side close to the feeding anastomosis inside the processing cylinder assembly, so as to realize the position replacement of the raw materials and effectively reduce the overall volume of the equipment in actual use.

[0019] The top end of the back material pipe is provided with a chute along the length direction, and a crushing cone plate is slidably arranged at the chute. The crushing cone plate is used for separating the gypsum blocks falling from above and reducing the occurrence of caking phenomenon.

[0020] The adjusting assembly comprises a vertical support plate installed at the top end of the inclined support frame. A servo motor for driving the rotation of the conveying auger and a push rod motor are installed on the side surface of the vertical support plate. The output shaft of the push rod motor is coaxially connected with a top rod penetrating into the inside of the equipment. One end of the top rod is fixedly connected with the crushing cone plate. The position adjustment of the crushing cone plate is stably realized, the feeding port at the top end of the back material pipe is shielded, and the control of the back material operation of the back material auxiliary assembly is realized.

[0021] As a preferred technical solution of the present application, a plurality of groups of inclined upward telescopic rods are uniformly arranged on the side surface of the conveying auger along the length direction. The telescopic ends of the telescopic rods are connected with the same group of scrapers. One end of the scraper is sharp and abuts against the inner wall of the processing cylinder assembly. The inner wall of the processing cylinder assembly is effectively scraped during the rotation of the processing cylinder assembly. The phenomenon that the gypsum raw materials are adhered to the inner wall of the processing cylinder assembly due to their own moisture and viscosity is avoided. The uniform heat treatment of the raw materials in the actual treatment process is ensured.

[0022] As a preferred technical solution of the present application, the end of the processing cylinder assembly away from the feeding anastomosis is penetratingly and rotatably provided with a feeding hopper communicated with the back material auxiliary assembly. The feeding hopper is used for adding CaO into the inside of the back material auxiliary assembly. The quality of the gypsum product in the actual calcination process is improved. The internal water vapor and CaS are digested in this process. The productivity of the product is improved.

[0023] As a preferred technical solution of the present application, the top end of the inclined support frame is further provided with an auxiliary support below the multifunctional processing cylinder assembly. The auxiliary support is used for supporting the processing cylinder assembly and ensuring the stability of the processing cylinder assembly during rotation.

[0024] The auxiliary support comprises a support inclined rod fixedly installed at the top end of the inclined support frame, the top end of the support inclined rod is connected with two Y-shaped supports, a roller is rotatably arranged at the two side arms of the Y-shaped support, the edge of the roller abuts against the bottom end of the processing cylinder assembly, so that the processing cylinder assembly is supported and the influence on the rotation of the processing cylinder assembly is reduced.

[0025] A method for preparing building gypsum from desulfurization gypsum, comprising the following steps:

[0026] In step S1, the desulfurization gypsum raw material for producing building gypsum is introduced from the raw material adding hopper, and is effectively and stably guided into the inside of the processing cylinder assembly under the stepped feature provided in the inside of the inserted cylinder body.

[0027] In step S2, drying, high-temperature air is guided into the spiral air guide pipe by means of the air guide box, and then the air pump is started to realize the re-printing of high-temperature air in the spiral air guide pipe, so as to realize the uniformity of the temperature in the inside of the processing cylinder assembly.

[0028] In the drying process, the end of the scraper stably abuts against the inner wall of the processing cylinder body through the setting of the telescopic rod and the scraper on the material returning auxiliary assembly, so as to effectively realize the scraping of the inner wall of the processing cylinder body and avoid the sticking phenomenon, and ensure that the desulfurization gypsum is effectively dried in the processing cylinder assembly with uniform temperature.

[0029] In the drying process, the servo motor can also be started to realize the rotation of the conveying auger, so that the gypsum raw material dithered to the lower side of the inside of the processing cylinder assembly falls into the feeding port on the material returning pipe and falls out at the discharging port, realizes the position adjustment of the raw material in the inside of the processing cylinder assembly, better plays the drying effect, and makes the gypsum raw material can be back and forth in the inside, realizes the baking effect of smaller volume for a longer time.

[0030] Step S3, calcination: the whole calcination process is similar to the drying process, the difference is that the temperature of the air introduced through the air guide box is adjusted to realize the adjustment of the internal temperature of the processing cylinder assembly, meet the needs of the calcination process, and in the process, CaO is added to the inside of the back feeding auxiliary assembly through the feeding hopper, so that CaO is guided at the back feeding auxiliary assembly and mixed with the back and forth exchanged desulfurized gypsum, so that it consumes the internal CaS generated in the internal dihydrate gypsum dehydration process, improves the utilization rate of building gypsum output, in this process, the change of internal pressure caused by the gasification of internal water vapor is monitored through the air pressure sensor on the feeding fitting, and the digestion of water vapor by added CaO, in this process, the excess water vapor in the inside can also be discharged through the pressure relief valve to realize the adjustment of the internal air pressure;

[0031] Step S4, aging: the gypsum raw material produced by calcination is continuously turned over, so that the dihydrate gypsum inside it dehydrates to form hemihydrate gypsum, and the anhydrous gypsum reacts with the internal water vapor to form hemihydrate gypsum, which can make the phase change process of gypsum powder tend to be stable, improve the content of hemihydrate gypsum, reduce the water demand of standard consistency, greatly improve the physical properties of building gypsum powder and improve the product quality.

[0032] The beneficial effects of the present application are:

[0033] 1. In actual use, through the setting of the back feeding auxiliary assembly inside the equipment, the desulfurized gypsum raw material is circulated and displaced inside, realizing the effect of long-time transmission and drying that can be achieved by long-distance equipment of short-length equipment, achieving the predetermined processing purpose while reducing the overall size of the equipment;

[0034] 2. Through the setting of the supporting cylinder, the spiral air guide pipe and the air exchange assembly, the temperature of each part inside the processing cylinder assembly is uniformly adjusted, providing a stable environment for subsequent calcination, drying and aging, and cooperating with the setting of the scraper and the crushing cone plate inside the back feeding auxiliary assembly, realizing effective scraping and crushing of the raw material, ensuring sufficient heat exchange of the raw material and reducing the phenomenon of sticking;

[0035] 3. Through the setting of the feeding hopper and the back feeding auxiliary assembly, CaO can be added to the inside during actual calcination, so that it digests and processes the internal CaS with the help of water vapor, improving the product yield.

[0036] In summary, the present application can occupy smaller space compared to existing equipment, and can stably perform drying, calcination and aging processes, ensure stable and efficient performance of each process, and improve the quality of actual products. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 The structure diagram of the present application is shown in the figure;

[0038] Figure 2 Another perspective view of the structure of the application is shown in the figure;

[0039] Figure 3 A side view of the multifunctional processing cylinder assembly of the application is shown in the figure;

[0040] Figure 4 A structure diagram of the spiral air guide pipe of the application is shown in the figure;

[0041] Figure 5 A structure diagram of the processing cylinder assembly of the application is shown in the figure;

[0042] Figure 6 A structure diagram of the material return auxiliary assembly of the application is shown in the figure;

[0043] Figure 7 A structure diagram of the driving assembly of the application is shown in the figure;

[0044] Figure 8 A structure diagram of the feeding anastomosis member of the application is shown in the figure;

[0045] Figure 9 A structure diagram of the auxiliary support member of the application is shown in the figure;

[0046] Figure 10 A structure diagram of the adjusting assembly of the application is shown in the figure;

[0047] Figure 11 A structure diagram of the air exchange assembly of the application is shown in the figure.

[0048] In the figure: 1, working support table; 2, inclined support frame; 3, multifunctional processing cylinder assembly; 31, support cylinder body; 32, spiral air guide pipe; 33, processing cylinder assembly; 331, processing cylinder body; 332, meshing tooth ring; 333, discharge pipe; 34, material return auxiliary assembly; 341, material return pipe; 342, conveying auger; 343, crushing conical plate; 344, scraper; 345, telescopic rod; 346, ejector rod; 35, driving assembly; 351, support seat; 352, rotating rod; 353, meshing gear; 354, mounting plate; 355, driving motor; 36, feeding hopper; 4, feeding anastomosis member; 41, plug-in cylinder body; 42, raw material adding hopper; 43, pressure relief valve; 44, air pressure sensor; 5, auxiliary support member; 51, support inclined rod; 52, roller; 53, Y-shaped support; 6, adjusting assembly; 61, vertical support plate; 62, servo motor; 63, push rod motor; 7, air exchange assembly; 71, air guide box; 72, air pump. DETAILED DESCRIPTION

[0049] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0050] With reference to Figures 1-11 A device for preparing building gypsum from desulfurization gypsum, comprising:

[0051] A working support table 1;

[0052] An inclined support frame 2 is arranged at the top end of the working support table 1, for providing a slight inclination angle for the working assembly, to facilitate the stable progress of the processing process;

[0053] A multifunctional processing cylinder assembly 3 is fixedly installed at the top end of the inclined support frame 2 through support feet, and the multifunctional processing cylinder assembly 3 is provided with a processing cylinder assembly 33 for realizing the processing of internal gypsum raw materials and a material return auxiliary assembly 34;

[0054] The multifunctional processing cylinder assembly 3 comprises a support cylinder body 31 fixedly connected with the fixing feet, the inside of the support cylinder body 31 is rotatably sleeved with the processing cylinder assembly 33, for providing a processing environment, the shaft center position of the processing cylinder assembly 33 is provided with the material return auxiliary assembly 34, for adjusting the position of the internal gypsum raw materials, realizing the mixing of a certain effect, and providing convenience for the addition and mixing of subsequent external substances, the multifunctional processing cylinder assembly 3 further comprises a driving assembly 35 fixedly installed at the top end of the inclined support frame 2, for driving the rotation of the processing cylinder assembly 33, to provide a power basis for the rolling collision of the internal raw materials;

[0055] A feeding anastomosis 4 is fixedly installed at the top end of the inclined support frame 2 through support feet, and the feeding anastomosis 4 comprises an inserted cylinder body 41, the inside of the inserted cylinder body 41 is stepped, one end of the processing cylinder assembly 33 is inserted at the inside step of the inserted cylinder body 41 and is flush with the inner wall, to facilitate the effective transition of the raw materials from the inserted cylinder body 41 to the inside of the multifunctional processing cylinder assembly 3, the inserted cylinder body 41 is provided with a raw material adding hopper 42 for raw material addition, a pressure relief valve 43 for adjusting the internal pressure, and a gas pressure sensor 44 for detecting the internal gas pressure;

[0056] An adjusting assembly 6 is used for cooperating with the movement of the internal components of the multifunctional processing cylinder assembly 3, to realize the working state adjustment of the material return auxiliary assembly 34.

[0057] With reference to Figures 3-4 and Figure 11The pipe wall inside supporting cylinder 31 is provided with spiral air guide pipe 32, and the two ends of spiral air guide pipe 32 are connected with air exchange assembly 7 installed at the top end of inclined support frame 2, which is used for conveying gas with adjusted temperature in spiral air guide pipe 32, realizing temperature adjustment of internal processing cylinder assembly 33, and providing appropriate temperature environment for drying, calcination and aging process in subsequent gypsum preparation process.

[0058] Air exchange assembly 7 includes air guide box 71 installed at the top end of inclined support frame 2 and air pump 72, and air guide box 71 and air pump 72 are respectively arranged in communication with the two ends of spiral air guide pipe 32. Air guide box 71 is used for connecting external assembly, realizing pouring of high-temperature gas or low-temperature gas, realizing filling of gas in spiral air guide pipe 32, and providing convenience for temperature adjustment of processing cylinder assembly 33. Air pump 72 is used for pumping gas in spiral air guide pipe 32, realizing flow of gas for temperature adjustment, and better ensuring uniform adjustment of air temperature in processing cylinder assembly 33.

[0059] Referring to Figure 5 and Figure 7 Processing cylinder assembly 33 includes processing cylinder body 331, and the inner wall of processing cylinder body 331 is annularly arranged with a plurality of groups of length-direction stirring grooves, which are used for driving gypsum raw materials to stir during overall rotation of processing cylinder assembly 33, and providing power basis for subsequent mixing, uniform heat exchange and collision of raw materials.

[0060] The outer side of processing cylinder body 331 is provided with meshing tooth ring 332 at both ends, drive assembly 35 includes support seat 351 installed at the top end of inclined support frame 2, rotating rod 352 penetrating through the inside of support seat 351, meshing gear 353 provided at both ends of rotating rod 352 and meshing with meshing tooth ring 332 on processing cylinder body 331, and installation plate 354 installed at one side of the top end of inclined support frame 2, one side of installation plate 354 is provided with drive motor 355 for driving rotating rod 352 to rotate, so that the rotation of processing cylinder assembly 33 is stably realized, and power basis is provided for each link of building gypsum production.

[0061] One end of processing cylinder body 331 is provided with discharge pipe 333, and control valve is arranged on discharge pipe 333, so as to facilitate the discharge of building gypsum powder material after processing is completed.

[0062] Referring to Figure 3 and Figure 6 and Figure 10The return auxiliary assembly 34 includes a return pipe 341, one end of the return pipe 341 is fixedly connected to the inner side of the feeding anastomosis 4, and the inner side of the return pipe 341 is rotatably provided with a conveying auger 342 for conveying raw materials. The top end of the return pipe 341 is provided with a feeding port away from the side of the feeding anastomosis 4, and the bottom end of the side close to the feeding anastomosis 4 is provided with a discharging port. The gypsum raw materials stirred at the end of the feeding anastomosis 4 inside the processing cylinder assembly 33 can fall into the inside of the return auxiliary assembly 34 and be gradually conveyed to the side close to the feeding anastomosis 4 inside the processing cylinder assembly 33, so as to realize the position replacement of the raw materials and effectively reduce the overall volume of the equipment in actual use.

[0063] The top end of the return pipe 341 is provided with a chute along the length direction, and a crushing cone plate 343 is slidably arranged at the chute. The crushing cone plate 343 is used for separating the gypsum blocks falling from above and reducing the occurrence of caking phenomenon.

[0064] The adjusting assembly 6 includes a vertical support plate 61 mounted at the top end of the inclined support frame 2. The side surface of the vertical support plate 61 is provided with a servo motor 62 for driving the conveying auger 342 to rotate, and a push rod motor 63. The output shaft of the push rod motor 63 is coaxially connected with a top rod 346 extending into the inside of the equipment. One end of the top rod 346 is fixedly connected with the crushing cone plate 343, so as to stably realize the position adjustment of the crushing cone plate 343, ensure that the crushing cone plate 343 shields the feeding port at the top end of the return pipe 341, and realize the control of the return operation of the return auxiliary assembly 34.

[0065] The conveying auger 342 is uniformly provided with a plurality of groups of inclined upward telescopic rods 345 along the length direction. The telescopic ends of the telescopic rods 345 are connected with the same group of scrapers 344. One end of the scraper 344 is sharp and abuts against the inner wall of the processing cylinder assembly 33, so as to effectively wipe the inner wall of the processing cylinder assembly 33 during the rotation of the processing cylinder assembly 33, avoid the phenomenon that the gypsum raw materials are adhered to the inner wall of the processing cylinder assembly 33 due to their own moisture and viscosity, and ensure the uniform heat treatment of the raw materials in the actual treatment process.

[0066] The end of the processing cylinder assembly 33 away from the feeding anastomosis 4 is provided with a feeding hopper 36 communicated with the return auxiliary assembly 34, for adding CaO into the inside of the return auxiliary assembly 34, so as to improve the quality of the gypsum product in the actual calcination process, digest the internal water vapor and CaS, and improve the production rate of the product.

[0067] Referring to Figures 1-2 and Figure 9 The top end of the inclined support frame 2 is further provided with an auxiliary support 5 below the multifunctional processing cylinder assembly 3, for supporting the processing cylinder assembly 33 and ensuring the stability of the processing cylinder assembly 33 during the rotation.

[0068] The auxiliary support 5 comprises a support inclined rod 51 fixedly installed at the top end of the inclined support frame 2, the top end of the support inclined rod 51 is connected with two Y-shaped supports 53, the two side arms of the Y-shaped supports 53 are rotationally provided with rollers 52, the edges of the rollers 52 abut against the bottom end of the processing cylinder assembly 33, so that the processing cylinder assembly 33 is supported and the influence on the rotation of the processing cylinder assembly 33 is reduced.

[0069] A method for preparing building gypsum from desulfurization gypsum, comprising the following steps:

[0070] Step S1, raw material introduction: first, the desulfurization gypsum raw material for producing building gypsum is introduced from the raw material adding hopper 42, and is effectively and stably guided into the inside of the processing cylinder assembly 33 under the stepped feature setting of the inserted cylinder body 41;

[0071] Step S2, drying: first, the high-temperature air is guided into the spiral air guide pipe 32 by means of the air guide box 71, then the air pump 72 is started to realize the re-printing of the high-temperature air in the spiral air guide pipe 32, so as to realize the uniformity of the temperature in the inside of the processing cylinder assembly 33, at this time, under the slight inclination setting of the whole device, the desulfurization gypsum raw material stably slides down, at the same time, the driving assembly 35 is started to realize the rotation of the driving motor 355 driven rotating rod 352, under the meshing effect of the meshing gear 353 and the meshing gear ring 332, the whole processing cylinder assembly 33 is rotated, and under the action of the inside of the processing cylinder body 331, the raw material is effectively driven and pushed to the upper side, so that the raw material falls under the action of its own gravity, collides with the broken conical plate 343, and the phenomenon of caking is reduced;

[0072] During the drying process, the end of the scraper 344 stably abuts against the inner wall of the processing cylinder body 331 through the setting of the telescopic rod 345 and the scraper 344 on the raw material returning auxiliary assembly 34, so as to effectively realize the scraping of the inner wall of the processing cylinder body 331, avoid the sticking phenomenon, and ensure that the desulfurization gypsum is effectively dried in the processing cylinder assembly 33 with uniform temperature;

[0073] During the drying process, the servo motor 62 can also be started to realize the rotation of the conveying auger 342, so that the gypsum raw material pushed to the lower side of the inside of the processing cylinder assembly 33 falls into the feeding port on the raw material returning pipe 341 and falls out of the discharging port, realizes the position adjustment of the raw material in the inside of the processing cylinder assembly 33, better plays the drying effect, so that the gypsum raw material can be exchanged in the inside, realizes the drying of the gypsum raw material with smaller volume for a longer time;

[0074] Step S3, calcination: the whole process of calcination is similar to the drying process, the difference is that the air temperature introduced through the air guide box 71 is adjusted to realize the adjustment of the internal temperature of the processing cylinder assembly 33, meet the needs of the calcination process, and in the process, CaO is added to the inside of the back material auxiliary assembly 34 through the feeding hopper 36, so that CaO is guided and mixed with the back and forth exchanged desulfurized gypsum at the back material auxiliary assembly 34, so that it consumes internal CaS with the water vapor generated in the internal dihydrate gypsum dehydration process, improves the utilization rate of building gypsum output, in this process, the internal pressure change caused by the internal water vapor gasification and the water vapor digestion of the added CaO are monitored through the air pressure sensor 44 on the feeding fitting 4, and the excess water vapor in the inside can also be discharged through the pressure relief valve 43 to realize the adjustment of the internal air pressure;

[0075] Step S4, aging: the gypsum raw material generated by calcination is continuously turned over, so that the dihydrate gypsum inside it dehydrates to form hemihydrate gypsum, and the anhydrous gypsum reacts with the internal water vapor to form hemihydrate gypsum, which can make the phase change process of the gypsum powder tend to be stable, improve the content of hemihydrate gypsum, reduce the water demand of its standard consistency, and greatly improve the physical properties of building gypsum powder and product quality.

[0076] Finally, it should be noted that in the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the indicated device or element to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0077] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "set", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0078] The above is only the preferred embodiment of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A production method of architectural gypsum from desulfurized gypsum, characterized by, The preparation method is based on a preparation device, which comprises: a working support table (1); an inclined support frame (2) arranged at the top end of the working support table (1); a multifunctional processing cylinder assembly (3) fixedly installed at the top end of the inclined support frame (2) through support feet, and the multifunctional processing cylinder assembly (3) is provided with a processing cylinder assembly (33) for realizing internal gypsum raw material processing and a material return auxiliary assembly (34); the multifunctional processing cylinder assembly (3) comprises a support cylinder body (31) fixedly connected with a fixing foot, a processing cylinder assembly (33) rotatably sleeved at the inner side of the support cylinder body (31) for providing a processing environment, a material return auxiliary assembly (34) penetrating the axial position of the processing cylinder assembly (33), and the multifunctional processing cylinder assembly (3) further comprises a driving assembly (35) fixedly installed at the top end of the inclined support frame (2) for driving the rotation of the processing cylinder assembly (33); a feeding anastomosis (4) fixedly installed at the top end of the inclined support frame (2) through support feet, and the feeding anastomosis (4) comprises an inserting cylinder body (41), the inner side of the inserting cylinder body (41) is stepped, one end of the processing cylinder assembly (33) is inserted at the inner side step of the inserting cylinder body (41) and flush with the inner wall, the inserting cylinder body (41) is provided with a raw material adding hopper (42) for raw material adding, a pressure relief valve (43) for adjusting the internal pressure, and a gas pressure sensor (44) for detecting the internal gas pressure; an adjusting assembly (6) for cooperating with the movement of the internal components of the multifunctional processing cylinder assembly (3); the preparation method comprises the following steps: step S1, raw material introduction: first, the desulfurized gypsum raw material for producing building gypsum is introduced from the raw material adding hopper (42), and under the stepped feature setting in the inserting cylinder body (41), it is effectively and stably guided to the inside of the processing cylinder assembly (33); step S2, drying: first, high-temperature air is guided into the spiral air guide pipe (32) by means of the air guide box (71), and then the air pump (72) is started to realize the re-printing of high-temperature air in the spiral air guide pipe (32), thereby realizing the uniformity of the temperature in each part of the processing cylinder assembly (33), at this time, under the slight inclination setting of the whole device, the desulfurized gypsum raw material slides stably, at the same time, by starting the driving assembly (35), the driving motor (355) drives the rotating rod (352) to rotate, under the meshing action of the meshing gear (353) and the meshing gear ring (332), the whole processing cylinder assembly (33) is rotated, and under the action of the internal detent groove of the processing cylinder body (331), the raw material is effectively driven and moved to the upper side, so that the raw material falls under the action of its own gravity, collides with the crushing conical plate (343), and reduces the phenomenon of caking; In the drying process, the end of the scraper (344) is in stable contact with the inner wall of the processing cylinder (331) through the telescopic rod (345) and the scraper (344) on the material return auxiliary assembly (34), effectively realizing the scraping of the inner wall of the processing cylinder (331), avoiding the occurrence of sticking phenomenon, and ensuring that the desulfurized gypsum is effectively dried in the processing cylinder assembly (33) with uniform temperature; In the drying process, the servo motor (62) is started to rotate the conveying auger (342), so that the gypsum raw material pushed into the lower side of the processing cylinder assembly (33) falls into the feeding port on the material return pipe (341) and falls out at the discharge port, realizing the position adjustment of the raw material in the processing cylinder assembly (33), better playing the effect of drying, so that the gypsum raw material can be exchanged in the interior, realizing the effect of baking for a longer time with a smaller volume; Step S3, calcination: the whole calcination process is similar to the drying process, the difference is that the air temperature introduced by the air guide box (71) is adjusted to realize the adjustment of the internal temperature of the processing cylinder assembly (33), meet the needs of the calcination process, and in the process, CaO is added to the inside of the material return auxiliary assembly (34) through the feeding hopper (36), so that CaO is guided and sent at the material return auxiliary assembly (34) and mixed with the back-and-forth exchanged desulfurized gypsum, so that it consumes internal CaS with water vapor generated in the process of internal gypsum dihydrate, improves the utilization rate of building gypsum output, in this process, the internal pressure change caused by the internal water vapor gasification and the water vapor digestion of the added CaO are monitored by the air pressure sensor (44) on the feeding fitting (4), and the excess water vapor in the interior can be discharged through the pressure relief valve (43) to realize the adjustment of the internal air pressure; Step S4, aging: continuously turning the calcined gypsum raw material to make the dihydrate gypsum in the interior dehydrate to form hemihydrate gypsum, and the anhydrite reacts with the internal water vapor to form hemihydrate gypsum, so that the phase change process of the gypsum powder tends to be stable, the content of hemihydrate gypsum is improved, the water demand of standard consistency is reduced, the physical properties of building gypsum powder are greatly improved, and the product quality is improved; The pipe wall of the supporting cylinder (31) is internally provided with a spiral air guide pipe (32), and the two ends of the spiral air guide pipe (32) are connected with an air exchange assembly (7) mounted at the top end of the inclined support frame (2); The air exchange assembly (7) comprises an air guide box (71) and an air pump (72) mounted at the top end of the inclined support frame (2), and the air guide box (71) and the air pump (72) are in communication with the two ends of the spiral air guide pipe (32), respectively; the air guide box (71) is used for connecting external components, and the air pump (72) is used for pumping the gas in the spiral air guide pipe (32); The processing cylinder assembly (33) comprises a processing cylinder (331), and the inner wall of the processing cylinder (331) is annularly arranged with a plurality of groups of lengthwise pushing grooves; Both ends of the outer side of the processing cylinder (331) are provided with meshing tooth rings (332), the driving assembly (35) includes a support seat (351) installed at the top end of the inclined support frame (2), a rotating rod (352) is arranged in the support seat (351), both ends of the rotating rod (352) are provided with meshing gears (353) engaged with the meshing tooth rings (332) on the processing cylinder (331), and one side of the top end of the inclined support frame (2) is provided with a mounting plate (354), one side of the mounting plate (354) is provided with a driving motor (355) for driving the rotating rod (352) to rotate; One end of the processing cylinder (331) is provided with a discharge pipe (333), and the discharge pipe (333) is provided with a control valve; The back feeding auxiliary assembly (34) includes a back feeding pipe (341), one end of the back feeding pipe (341) is fixedly connected with the inner side of the feeding anastomat (4), and a conveying auger (342) for conveying raw materials is rotatably arranged in the inner side of the back feeding pipe (341); the top end of the back feeding pipe (341) is provided with a feeding port on the side away from the feeding anastomat (4), and the bottom end of the side close to the feeding anastomat (4) is provided with a discharge port; The top end of the back feeding pipe (341) is provided with a chute along the length direction, and a crushing cone plate (343) slides in the chute; The adjusting assembly (6) includes a vertical support plate (61) installed at the top end of the inclined support frame (2), a servo motor (62) for driving the conveying auger (342) to rotate is installed on the side of the vertical support plate (61), and a push rod motor (63) is installed on the side of the vertical support plate (61); the output shaft of the push rod motor (63) is coaxially connected with a top rod (346) penetrating into the inside of the equipment, and one end of the top rod (346) is fixedly connected with the crushing cone plate (343); The conveying auger (342) is uniformly provided with a plurality of groups of telescopic rods (345) inclined upward along the length direction, and the telescopic ends of the telescopic rods (345) are connected with the same group of scrapers (344); one end of the scraper (344) is sharp, and the other end is in contact with the inner wall of the processing cylinder assembly (33); The end of the processing cylinder assembly (33) away from the feeding anastomat (4) is rotatably provided with a feeding hopper (36) in communication with the back feeding auxiliary assembly (34).

2. A method of producing construction gypsum from desulphurisation gypsum according to claim 1, characterised in that The top end of the inclined support frame (2) is further provided with an auxiliary support (5) below the multifunctional processing cylinder assembly (3); The auxiliary support (5) includes a support inclined rod (51) fixedly installed at the top end of the inclined support frame (2), two Y-shaped supports (53) are connected to the top end of the support inclined rod (51), and rollers (52) are rotatably arranged at both side arms of the Y-shaped supports (53); the edges of the rollers (52) are in contact with the bottom end of the processing cylinder assembly (33).

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