A production equipment for calcining building gypsum with phosphogypsum

Abstract

The present invention discloses a production equipment for calcining building gypsum with phosphogypsum, which relates to the field of phosphogypsum processing, including a rotary kiln and a drying cabin arranged at the feeding end of the rotary kiln, wherein the drying cabin includes a straight cabin with one end rotatably connected to the rotary kiln and communicated with the rotary kiln, and an arc cabin arranged on the outer wall of one side of the straight cabin and communicated with the straight cabin, wherein a drying and conveying device for transporting phosphogypsum is arranged in the drying cabin, and a feeding device for feeding phosphogypsum to the drying and conveying device is arranged on the outer wall of the arc cabin, and a crushing and feeding device is arranged in the straight cabin and at one end of the straight cabin close to the rotary kiln, wherein the crushing and feeding device is used to convey the phosphogypsum dried by the drying and conveying device to the rotary kiln. The present invention is a calcination production equipment that is convenient for dehydrating and drying phosphogypsum using flue gas heat.

Description

Technical Field

[0001] The invention mainly relates to the technical field of phosphogypsum processing, and specifically relates to production equipment for calcining building gypsum with phosphogypsum. Background Art

[0002] Phosphogypsum is a solid waste generated in the wet phosphoric acid process. Its main component is calcium sulfate dihydrate. Currently, there are many ways to recycle phosphogypsum, such as preparing compound fertilizers and building materials. The preparation of phosphogypsum for building materials often requires multiple steps such as washing, neutralization, filter pressing, drying and calcination. Due to the high water content on the surface of phosphogypsum waste and the stickiness of the material, it is difficult to transport the solid phosphogypsum during processing. During multi-step processing, residues are easily left in the transmission pipeline and equipment, and the cleaning process is complicated.

[0003] According to the rotary kiln for calcining phosphogypsum provided in the patent document with application number CN201210252301.4, the product includes a kiln, a rotary kiln tube, and an electrostatic precipitator. The rotary kiln tube is arranged in the center of the kiln, a combustion chamber is arranged at one end of the kiln, three partition walls and two fire walls are arranged on the top of the kiln, two lower partition walls and three lower fire walls are arranged on the bottom of the kiln, and the bottom of the kiln is divided into six smoke settling chambers and three high, medium and constant temperature zones. Flue gas fire pipes are evenly distributed on the inner wall of the rotary kiln tube, a hot flue gas inlet is arranged at one end and an outlet is arranged at the other end and connected with the flue gas fire pipes respectively, and an annular gas collecting hood is arranged at the outlet end; the combination of the boiling furnace and the rotary kiln can make full use of the heat, increase the contact surface between the phosphogypsum and the rotary kiln smoke and fire pipe, and play the role of turning the material. The phosphogypsum does not contact with the flue gas, thereby ensuring the quality and whiteness of the product, saving energy and meeting the environmental protection requirements of flue gas dust.

[0004] When the product in the above patent is working, the phosphogypsum does not come into contact with the flue gas, thereby ensuring the quality and whiteness of the product, saving energy and meeting the environmental protection requirements of flue gas dust. However, it is not convenient to use the heat of the flue gas to dehydrate and dry the phosphogypsum. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a production equipment for calcining building gypsum with phosphogypsum to solve the technical problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a production equipment for calcining building gypsum with phosphogypsum, comprising a rotary kiln and a drying cabin arranged at the feeding end of the rotary kiln, wherein the drying cabin comprises a straight cabin whose one end is rotatably connected to the rotary kiln and communicated with the rotary kiln, and an arc cabin arranged on the outer wall of one side of the straight cabin and communicated with the straight cabin, a drying and conveying device for transporting phosphogypsum is arranged in the drying cabin, a feeding device for feeding phosphogypsum to the drying and conveying device is arranged on the outer wall of the arc cabin, a crushing and feeding device is arranged in the straight cabin and at one end of the straight cabin close to the rotary kiln, and the crushing and feeding device is used to convey the phosphogypsum dried by the drying and conveying device to the rotary kiln;

[0007] The drying and conveying device includes an annular slide rail arranged on the inner wall of the drying chamber, an n-shaped frame with the top slidably connected to the annular slide rail, a transmission chain arranged on the top of the inner wall of the drying chamber and used to drive multiple n-shaped frames to move, a V-shaped leakage hole material holding box arranged at the bottom of the n-shaped frame, leakage hole pressure plates slidably connected to both sides of the n-shaped frame at both ends, a leakage hole pad located in the V-shaped leakage hole material holding box and the top of which is connected to the bottom of the leakage hole pressure plate through multiple ropes, an elastic lifting component symmetrically arranged on both sides of the n-shaped frame and the bottom end of which is connected to the top of the leakage hole pressure plate, and two limiting guide plate components symmetrically arranged on the outer wall of the arc chamber and the execution ends extend into the arc chamber, the limiting guide plate components are used to apply downward pressure to the leakage hole pressure plate.

[0008] Preferably, the position limiting guide plate component includes a slide hole that is obliquely arranged through the outer wall of the arc-shaped cabin, an L-shaped plate that extends into the arc-shaped cabin through the slide hole at one end, and a pneumatic cylinder that is arranged on the outer wall of the L-shaped plate and has an execution end that passes through the L-shaped plate and connects to the outer wall of the arc-shaped cabin. In this preferred embodiment, the position limiting guide plate component facilitates the downward pressing of the leak hole pressure plate during the movement of the n-shaped frame, which facilitates the filter pressing and dehydration of the phosphogypsum.

[0009] Preferably, the inner wall of the n-shaped frame is symmetrically provided with two locking components, and the locking components include limiting bosses provided on the inner wall of the n-shaped frame. In this preferred embodiment, the locking components facilitate the fixing of the leak hole pressing plate after the leak hole pressing plate moves down to the limit position.

[0010] Preferably, the outer wall of the straight cabin is symmetrically provided with two unlocking components whose execution ends penetrate the straight cabin and extend into the straight cabin, the unlocking components are located on the side of the crushing and feeding device away from the rotary kiln, and the unlocking components include a driving cylinder provided on the outer wall of the straight cabin and whose execution ends penetrate the straight cabin, a push rod provided at the execution end of the driving cylinder, and a through hole provided on the outer wall of the n-shaped frame and corresponding to the position of the push rod. In this preferred embodiment, the unlocking components facilitate unlocking the locking components.

[0011] Preferably, the elastic lifting component includes a first positioning plate arranged on the outer wall of the n-shaped frame, a second positioning plate arranged on the leakage hole pressing plate, and a spring arranged between the first positioning plate and the second positioning plate. In this preferred embodiment, the elastic lifting component is used to facilitate the lifting of the leakage hole pressing plate.

[0012] Preferably, the feeding device includes a feeding pipe with one end connected to the outer wall of the arc-shaped cabin, a transmission pipe slidably connected to the inner wall of the feeding pipe, a power auger arranged in the transmission pipe, a feeding hopper with the bottom connected to the outer wall of the transmission pipe, a second linear module arranged on the outer wall of the feeding pipe and used to drive the transmission pipe to move, a first discharge pipe with one end connected to the outer wall of the transmission pipe and located at one end of the transmission pipe away from the feeding hopper, a second discharge pipe slidably connected to the inner wall of the first discharge pipe, and a telescopic cylinder arranged at the end of the transmission pipe and used to drive the second discharge pipe to move. In this preferred embodiment, the feeding device facilitates the addition of phosphogypsum to the drying and conveying device.

[0013] Preferably, the crushing and feeding device includes a grinding component, a feeding component and a striking component which are arranged in the straight cabin and are arranged in sequence in the direction extending away from the rotary kiln. The feeding component includes a positioning box arranged on the outer wall of the straight cabin, a first linear module arranged in the positioning box, a moving rod with one end connected to the execution end of the first linear module and the other end passing through the straight cabin and extending into the straight cabin, a conveying plate connected to the top of the moving rod at the bottom, and two lifting frames symmetrically arranged at one end of the conveying plate away from the grinding component. In this preferred embodiment, the crushing and feeding device facilitates the fine crushing and feeding of the dried phosphogypsum, and the feeding component facilitates the movement of the phosphogypsum discharged from the drying and conveying device to the grinding component.

[0014] Preferably, the grinding component includes a grinding rod arranged in the vertical cabin, a power motor arranged on the outer wall of the vertical cabin, and a reducer arranged on the outer wall of the vertical cabin and connected to the output end of the power motor, and the output end of the reducer is connected to the grinding rod. In this preferred embodiment, the grinding component facilitates the grinding of phosphogypsum.

[0015] Preferably, the striking component includes a positioning tube with one end connected to the outer wall of the straight cabin, a moving block slidably connected to the inner wall of the positioning tube, a third linear module provided on the outer wall of the positioning tube and used to drive the moving block to move, a power cylinder provided at the end of the positioning tube, and a striking plate provided at the execution end of the power cylinder. In this preferred embodiment, the striking component facilitates the movement of the dried phosphogypsum into the feeding component.

[0016] Preferably, the outer wall of the grinding roller is provided with a plurality of inclined protrusions in an annular array. In this preferred embodiment, the inclined protrusions facilitate the full crushing of the material when the grinding roller is grinding and rotating, and facilitate the scattering and dispersion of the material when the grinding roller is feeding and rotating.

[0017] In summary, the present invention mainly has the following beneficial effects:

[0018] The device of the present invention is convenient for utilizing the heat discharged from the feed port of the rotary kiln to dehydrate and dry the phosphogypsum. The dried phosphogypsum can be crushed and then enter the rotary kiln for calcination. During the dehydration and drying process of the phosphogypsum, it is transported by a drying and conveying device. The drying and conveying device can squeeze and dehydrate the phosphogypsum during transportation, and can also perform suspension drying on the phosphogypsum.

[0019] The drying and conveying device avoids the flow and conveying of phosphogypsum during dehydration and drying, avoids the generation of residues of phosphogypsum on the flow path, ensures the relative cleanliness of the entire device, and reduces the workload of self-cleaning;

[0020] In the drying and conveying device, the limit guide plate component is used to press down the leak hole pressing plate during the movement of the n-shaped frame, so as to facilitate the filter pressing and dehydration of the phosphogypsum. The locking component is used to fix the leak hole pressing plate after the leak hole pressing plate is moved down to the limit position. The unlocking component is used to unlock the locking component. The elastic lifting component is used to drive the leak hole pressing plate to be lifted, so as to suspend the phosphogypsum and accelerate the drying.

[0021] The feeding device facilitates the addition of phosphogypsum to the drying and conveying device, the crushing and feeding device facilitates the fine crushing of the dried phosphogypsum and feeding it to the rotary kiln, the feeding component in the crushing and feeding device facilitates the movement of the phosphogypsum discharged from the drying and conveying device to the grinding component, the grinding component facilitates the grinding of the phosphogypsum, the striking component facilitates the movement of the dried phosphogypsum into the feeding component, the inclined protrusion facilitates the full crushing of the material when the grinding roller rotates, and facilitates the scattering and dispersion of the material when the grinding roller rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an axonometric diagram of the overall structure of the present invention;

[0023] Figure 2 It is an exploded view of the overall structure of the present invention;

[0024] Figure 3 It is an exploded view of the drying and conveying device structure of the present invention;

[0025] Figure 4 It is an exploded view of the n-shaped frame structure of the present invention;

[0026] Figure 5An exploded view of the internal structure of the drying chamber of the present invention;

[0027] Figure 6 It is an exploded view of the feeding device structure of the present invention;

[0028] Figure 7 It is an exploded view of the structure of the crushing and feeding device of the present invention;

[0029] Figure 8 It is a top view of the overall structure of the present invention;

[0030] Fig. 9 It is a cross-sectional view of the overall structure of the present invention;

[0031] Fig.10 It is a cross-sectional view of the structure of the crushing and feeding device of the present invention;

[0032] Fig.11 It is a cross-sectional view of the structure of the feeding device of the present invention;

[0033] Fig.12 It is a cross-sectional view of the structure of the drying and conveying device of the present invention;

[0034] Fig.13 It is an enlarged view of the structure at location A of the present invention.

[0035] Description of the drawings: 10, rotary kiln; 11, drying cabin; 111, straight cabin; 112, arc cabin; 20, drying conveying device; 21, annular slide rail; 22, N-shaped frame; 221, V-shaped leak hole material box; 23, transmission chain; 24, leak hole pressure plate; 25, leak hole pad; 26, elastic lifting component; 261, first positioning plate; 262, second positioning plate; 263, spring; 27, limit guide plate component; 271, slideway hole; 272, L-shaped plate; 273, pneumatic cylinder; 28, locking component; 281, limit boss; 29, unlocking component; 291, driving cylinder; 292, push rod; 293, through hole; 30, feeding device ; 31. Feeding pipe; 32. Transmission pipe; 33. Power auger; 34. Feed hopper; 35. Second linear module; 36. First discharge pipe; 37. Second discharge pipe; 38. Telescopic cylinder; 40. Crushing and feeding device; 41. Grinding component; 411. Grinding rod; 4111. Inclined protrusion; 412. Power motor; 413. Reducer; 42. Feeding component; 421. Positioning box; 422. First linear module; 423. Moving rod; 424. Conveying plate; 425. Lifting frame; 43. Striking component; 431. Positioning pipe; 432. Moving block; 433. Third linear module; 434. Power cylinder; 435. Striking plate. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] The following describes an embodiment of the present invention based on its overall structure.

[0038] Example

[0039] Please refer to the attached Figure 1 , 2, 3, 4, 8, 9, 12, and 13, in a preferred embodiment of the present invention, a production device for calcining building gypsum with phosphogypsum comprises a rotary kiln 10, and a drying chamber 11 arranged at the feeding end of the rotary kiln 10, the drying chamber 11 comprises a straight chamber 111 whose one end is rotatably connected to the rotary kiln 10 and communicated with the rotary kiln 10, and an arc chamber 112 arranged on an outer wall of one side of the straight chamber 111 and communicated with the straight chamber 111, a drying and conveying device 20 for transporting phosphogypsum is arranged in the drying chamber 11, a feeding device 30 for feeding phosphogypsum to the drying and conveying device 20 is arranged on the outer wall of the arc chamber 112, a crushing and feeding device 40 is arranged in the straight chamber 111 and at one end of the straight chamber 111 close to the rotary kiln 10, the crushing and feeding device 40 is used to convey the phosphogypsum dried by the drying and conveying device 20 to the rotary kiln 10;The drying conveying device 20 includes an annular slide rail 21 provided on the inner wall of the drying chamber 11, an n-shaped frame 22 slidably connected to the annular slide rail 21 at the top, a transmission chain 23 provided on the top of the inner wall of the drying chamber 11 and used to drive the multiple n-shaped frames 22 to move, a V-shaped leak hole material box 221 provided at the bottom of the n-shaped frame 22, a leak hole pressure plate 24 slidably connected to both sides of the n-shaped frame 22 at both ends, a leak hole pad 25 located in the V-shaped leak hole material box 221 and connected to the bottom of the leak hole pressure plate 24 through multiple ropes at the top, and symmetrically arranged The elastic lifting parts 26 are connected to the top of the leak hole pressure plate 24 at the bottom ends on both sides of the n-shaped frame 22, and two limiting guide plate parts 27 are symmetrically arranged on the outer wall of the arc cabin 112 and the execution ends extend into the arc cabin 112. The limiting guide plate parts 27 are used to give downward pressure to the leak hole pressure plate 24. The limiting guide plate parts 27 include a slideway hole 271 that is penetrated through the outer wall of the arc cabin 112 and is arranged obliquely, an L-shaped plate 272 that extends into the arc cabin 112 through the slideway hole 271, and a The outer wall of the L-shaped plate 272 and the pneumatic cylinder 273 whose execution end passes through the L-shaped plate 272 and is connected to the outer wall of the arc cabin 112, the inner wall of the n-shaped frame 22 is symmetrically provided with two locking components 28, and the locking components 28 include a limiting boss 281 arranged on the inner wall of the n-shaped frame 22, and the outer wall of the straight cabin 111 is symmetrically provided with two unlocking components 29 whose execution ends pass through the straight cabin 111 and extend into the straight cabin 111, and the unlocking components 29 are located on the side of the crushing and feeding device 40 away from the rotary kiln 10, and the unlocking part The component 29 includes a driving cylinder 291 disposed on the outer wall of the straight cabin 111 and having an execution end passing through the straight cabin 111, a push rod 292 disposed on the execution end of the driving cylinder 291, and a through hole 293 disposed on the outer wall of the n-shaped frame 22 and corresponding to the position of the push rod 292. The elastic lifting component 26 includes a first positioning plate 261 disposed on the outer wall of the n-shaped frame 22, a second positioning plate 262 disposed on the leak hole pressure plate 24, and a spring 263 disposed between the first positioning plate 261 and the second positioning plate 262. ;

[0040] It should be noted that, in the present embodiment, when the phosphogypsum is calcined, the rotary kiln 10 calcines the phosphogypsum, and the heat in the rotary kiln 10 can enter the drying chamber 11 through the feeding port of the rotary kiln 10, so as to facilitate the drying of the phosphogypsum in the drying chamber 11. The feeding device 30 conveys the phosphogypsum raw material to the drying and conveying device 20, and the drying and conveying device 20 drives the phosphogypsum to move in the drying chamber 11 to dehydrate and dry the phosphogypsum. The crushing and feeding device 40 crushes the dehydrated and dried phosphogypsum and feeds the crushed phosphogypsum into the rotary kiln 10.

[0041] The drying and conveying device 20 is divided into a filter pressing and dehydration stage and a suspension drying stage when working. In the filter pressing and dehydration stage, the V-shaped leak hole material box 221 receives the phosphogypsum raw material conveyed by the feeding device 30. After receiving the raw material, the transmission chain 23 drives the V-shaped leak hole material box 221 to move in the drying chamber 11 through the n-shaped frame 22 to dehydrate and dry the phosphogypsum. When the n-shaped frame 22 passes through the limiting guide plate component 27, the leak hole pressing plate 24 slides from top to bottom outside the n-shaped frame 22 under the guidance of the limiting guide plate component 27 to squeeze the phosphogypsum. The moisture on the surface of the phosphogypsum can be discharged through the leak hole pad 25, the V-shaped leak hole material box 221 and the leak hole pressing plate 24. When the leak hole pressing plate 24 drops to the limit position, the limiting boss 281 will limit the leak hole pressing plate 24 so that the leak hole pressing plate 24 can continue to maintain the squeezing force for filter pressing and dehydration.

[0042] In the hanging drying stage, when the n-shaped frame 22 moves to the unlocking component 29, the two unlocking components 29 work at the same time, the actuator end of the driving cylinder 291 drives the push rod 292 to move, and the push rod 292 squeezes the two ends of the leakage hole pressing plate 24 through the through hole 293. The leakage hole pressing plate 24 moves upward under the action of the spring 263, and the leakage hole pressing plate 24 drives the leakage hole pad 25 to move upward through the rope, so that the phosphogypsum is in a hanging state, so as to facilitate drying;

[0043] Furthermore, a gas inlet and a gas outlet may be provided at the top of the drying chamber 11 to facilitate the discharge of wet air;

[0044] Further, the motor outside the drying chamber 11 drives the sprocket to rotate, and the sprocket drives the transmission chain 23 to move;

[0045] Furthermore, the drainage from the phosphogypsum filter press can be diverted through the guide plate at the bottom of the drying chamber 11 and discharged through the drain pipe;

[0046] Furthermore, when the limiting guide plate component 27 is working, the executing end of the pneumatic cylinder 273 drives the L-shaped plate 272 to move so that the L-shaped plate 272 enters the drying chamber 11 through the slide hole 271. Since the L-shaped plate 272 is arranged at an angle, when the n-shaped frame 22 passes through the L-shaped plate 272, the leakage hole pressure plate 24 is continuously squeezed vertically downward by the L-shaped plate 272.

[0047] Please refer to the attached Figure 1 , 6As shown in Figure 11, in another preferred embodiment of the present invention, the feeding device 30 includes a loading pipe 31 whose one end is connected to the outer wall of the arc-shaped cabin 112, a transmission pipe 32 slidably connected to the inner wall of the loading pipe 31, a power auger 33 arranged in the transmission pipe 32, a feeding hopper 34 whose bottom is connected to the outer wall of the transmission pipe 32, a second linear module 35 arranged on the outer wall of the loading pipe 31 and used to drive the transmission pipe 32 to move, a first discharge pipe 36 whose one end is connected to the outer wall of the transmission pipe 32 and is located at one end of the transmission pipe 32 away from the feed hopper 34, a second discharge pipe 37 slidably connected to the inner wall of the first discharge pipe 36, and a telescopic cylinder 38 arranged at the end of the transmission pipe 32 and used to drive the second discharge pipe 37 to move.

[0048] It should be noted that, in this embodiment, when the feeding device 30 is working, the phosphogypsum is added to the transmission pipe 32 through the feeding hopper 34, and the motor execution end can drive the power auger 33 to rotate, and the power auger 33 drives the phosphogypsum to move in the transmission pipe 32;

[0049] When it is necessary to load the V-shaped leakage hole material box 221, the execution end of the second linear module 35 drives the transmission tube 32 to move until the first discharge tube 36 reaches the specified position, and the telescopic cylinder 38 is opened. The execution end of the telescopic cylinder 38 drives the second discharge tube 37 to move until the second discharge tube 37 overlaps the V-shaped leakage hole material box 221, and the execution end of the motor drives the power auger 33 to rotate, and the phosphogypsum in the transmission tube 32 enters the V-shaped leakage hole material box 221 through the first discharge tube 36 and the second discharge tube 37.

[0050] Please refer to the attached Figure 2 , 5As shown in Figures 7 and 10, in another preferred embodiment of the present invention, the crushing and feeding device 40 includes a grinding component 41, a feeding component 42 and a striking component 43 which are arranged in the straight cabin 111 and are sequentially arranged in a direction extending away from the rotary kiln 10, the feeding component 42 includes a positioning box 421 arranged on the outer wall of the straight cabin 111, a first linear module 422 arranged in the positioning box 421, a moving rod 423 having one end connected to an execution end of the first linear module 422 and the other end passing through the straight cabin 111 and extending into the straight cabin 111, a conveying plate 424 having a bottom connected to the top of the moving rod 423, and two lifting frames 425 symmetrically arranged at the end of the conveying plate 424 away from the grinding component 41, the grinding component 41 includes a positioning box 421 arranged on the outer wall of the straight cabin 111, a first linear module 422 arranged in the positioning box 421, a moving rod 423 having one end connected to an execution end of the first linear module 422 and the other end passing through the straight cabin 111 and extending into the straight cabin 111, a conveying plate 424 having a bottom connected to the top of the moving rod 423, and two lifting frames 425 symmetrically arranged at the end of the conveying plate 424 away from the grinding component 41, The grinding rod 411 in the straight cabin 111, the power motor 412 arranged on the outer wall of the straight cabin 111, and the reducer 413 arranged on the outer wall of the straight cabin 111 and connected to the output end of the power motor 412, the output end of the reducer 413 is connected to the grinding rod 411, the striking component 43 includes a positioning tube 431 with one end connected to the outer wall of the straight cabin 111, a moving block 432 slidably connected to the inner wall of the positioning tube 431, a third linear module 433 arranged on the outer wall of the positioning tube 431 and used to drive the moving block 432 to move, a power cylinder 434 arranged at the end of the positioning tube 431, and a striking plate 435 arranged at the execution end of the power cylinder 434, and a plurality of inclined protrusions 4111 are provided in a ring array on the outer wall of the grinding rod 411.

[0051] It should be noted that, in the present embodiment, when the dried phosphogypsum reaches the feeding position of the crushing and feeding device 40, the execution end of the first linear module 422 drives the moving rod 423 and the conveying plate 424 to move until the conveying plate 424 abuts against the V-shaped leak hole material box 221 for material discharging. During the process of the conveying plate 424 abutting against the V-shaped leak hole material box 221 for material discharging, the lifting frame 425 can lift the leak hole pressing plate 24, and the leak hole pressing plate 24 can drive the leak hole pad 25 to lift through the rope to facilitate unloading, and the striking component 43 strikes the dried phosphogypsum into the conveying plate 424;

[0052] The first linear module 422 actuator drives the moving rod 423 and the conveying plate 424 to move until the conveying plate 424 moves to the position of the grinding component 41, and the grinding component 41 crushes the dried phosphogypsum and moves the crushed phosphogypsum into the rotary kiln 10 for calcination;

[0053] Furthermore, when the striking component 43 is working, the execution end of the third linear module 433 drives the moving block 432 to move until the striking plate 435 corresponds to the position of the V-shaped leak hole material box 221, and the execution end of the power cylinder 434 drives the striking plate 435 to move, and the striking plate 435 strikes the dried phosphogypsum into the conveying plate 424;

[0054] Furthermore, when the grinding component 41 is working, the execution end of the power motor 412 drives the reducer 413 to work, and the output end of the reducer 413 drives the grinding rod 411 to rotate. When the grinding rod 411 rotates counterclockwise, the phosphogypsum on the conveying plate 424 is squeezed and crushed, and the inclined protrusion 4111 can assist in crushing. When the grinding rod 411 rotates clockwise, the grinding rod 411 moves the crushed phosphogypsum into the rotary kiln 10, and the inclined protrusion 4111 can have a scattering effect on the phosphogypsum, so as to facilitate the dispersion of the phosphogypsum into the rotary kiln 10.

[0055] The working principle of the present invention is:

[0056] The electrical components in the present invention are all triggered to operate by the PLC controller;

[0057] During the calcination of phosphogypsum, the rotary kiln 10 calcines the phosphogypsum, and the heat in the rotary kiln 10 can enter the drying chamber 11 through the feeding port of the rotary kiln 10 to facilitate the drying of the phosphogypsum in the drying chamber 11. The feeding device 30 conveys the phosphogypsum raw material to the drying and conveying device 20. The drying and conveying device 20 drives the phosphogypsum to move in the drying chamber 11 to dehydrate and dry the phosphogypsum. The crushing and feeding device 40 crushes the dehydrated and dried phosphogypsum and feeds the crushed phosphogypsum into the rotary kiln 10.

[0058] The drying and conveying device 20 is divided into a filter pressing and dehydration stage and a suspension drying stage when working. In the filter pressing and dehydration stage, the V-shaped leak hole material box 221 receives the phosphogypsum raw material conveyed by the feeding device 30. After receiving the raw material, the transmission chain 23 drives the V-shaped leak hole material box 221 to move in the drying chamber 11 through the n-shaped frame 22 to dehydrate and dry the phosphogypsum. When the n-shaped frame 22 passes through the limiting guide plate component 27, the leak hole pressing plate 24 slides from top to bottom outside the n-shaped frame 22 under the guidance of the limiting guide plate component 27 to squeeze the phosphogypsum. The moisture on the surface of the phosphogypsum can be discharged through the leak hole pad 25, the V-shaped leak hole material box 221 and the leak hole pressing plate 24. When the leak hole pressing plate 24 drops to the limit position, the limiting boss 281 will limit the leak hole pressing plate 24 so that the leak hole pressing plate 24 can continue to maintain the squeezing force for filter pressing and dehydration.

[0059] In the hanging drying stage, when the n-shaped frame 22 moves to the unlocking component 29, the two unlocking components 29 work at the same time, the actuator end of the driving cylinder 291 drives the push rod 292 to move, and the push rod 292 squeezes the two ends of the leakage hole pressing plate 24 through the through hole 293. The leakage hole pressing plate 24 moves upward under the action of the spring 263, and the leakage hole pressing plate 24 drives the leakage hole pad 25 to move upward through the rope, so that the phosphogypsum is in a hanging state, so as to facilitate drying;

[0060] A gas inlet and a gas outlet may be provided on the top of the drying chamber 11 to facilitate the discharge of wet air;

[0061] The motor outside the drying chamber 11 drives the sprocket to rotate, and the sprocket drives the transmission chain 23 to move;

[0062] The drainage from the phosphogypsum filter press can be diverted through the guide plate at the bottom of the drying chamber 11 and discharged through the drainage pipe;

[0063] When the limiting guide plate component 27 is working, the actuator end of the pneumatic cylinder 273 drives the L-shaped plate 272 to move, so that the L-shaped plate 272 enters the drying chamber 11 through the slide hole 271. Since the L-shaped plate 272 is inclined, when the n-shaped frame 22 passes through the L-shaped plate 272, the leak hole pressing plate 24 is continuously pressed vertically downward by the L-shaped plate 272;

[0064] When the feeding device 30 is working, the phosphogypsum is added into the transmission pipe 32 through the feeding hopper 34, and the motor execution end can drive the power auger 33 to rotate, and the power auger 33 drives the phosphogypsum to move in the transmission pipe 32;

[0065] When the V-shaped leak hole material box 221 needs to be loaded, the execution end of the second linear module 35 drives the transmission tube 32 to move until the first discharge tube 36 reaches the specified position, the telescopic cylinder 38 is opened, and the execution end of the telescopic cylinder 38 drives the second discharge tube 37 to move until the second discharge tube 37 overlaps the V-shaped leak hole material box 221, and the execution end of the motor drives the power auger 33 to rotate, and the phosphogypsum in the transmission tube 32 enters the V-shaped leak hole material box 221 through the first discharge tube 36 and the second discharge tube 37;

[0066] When the dried phosphogypsum reaches the feeding position of the crushing and feeding device 40, the execution end of the first linear module 422 drives the moving rod 423 and the conveying plate 424 to move until the conveying plate 424 abuts against the V-shaped leak hole material box 221 for unloading. During the process of the conveying plate 424 abutting against the V-shaped leak hole material box 221 for unloading, the lifting frame 425 can lift the leak hole pressing plate 24, and the leak hole pressing plate 24 can drive the leak hole pad 25 to lift through the rope to facilitate unloading, and the striking component 43 hits the dried phosphogypsum into the conveying plate 424;

[0067] The first linear module 422 actuator drives the moving rod 423 and the conveying plate 424 to move until the conveying plate 424 moves to the position of the grinding component 41, and the grinding component 41 crushes the dried phosphogypsum and moves the crushed phosphogypsum into the rotary kiln 10 for calcination;

[0068] When the striking component 43 is working, the execution end of the third linear module 433 drives the moving block 432 to move until the striking plate 435 corresponds to the position of the V-shaped leak hole material box 221, and the execution end of the power cylinder 434 drives the striking plate 435 to move, and the striking plate 435 strikes the dried phosphogypsum into the conveying plate 424;

[0069] When the grinding component 41 is working, the execution end of the power motor 412 drives the reducer 413 to work, and the output end of the reducer 413 drives the grinding rod 411 to rotate. When the grinding rod 411 rotates counterclockwise, the phosphogypsum on the conveying plate 424 is squeezed and crushed, and the inclined protrusion 4111 can assist in crushing. When the grinding rod 411 rotates clockwise, the grinding rod 411 moves the crushed phosphogypsum into the rotary kiln 10, and the inclined protrusion 4111 can have a scattering effect on the phosphogypsum, so as to facilitate the dispersion of the phosphogypsum into the rotary kiln 10.

[0070] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A production equipment for calcining building gypsum with phosphogypsum, comprising a rotary kiln (10) and a drying chamber (11) arranged at the feed end of the rotary kiln (10), characterized in that: The drying chamber (11) comprises a straight chamber (111) whose one end is rotatably connected to the rotary kiln (10) and is in communication with the rotary kiln (10), and an arc-shaped chamber (112) arranged on an outer wall of one side of the straight chamber (111) and in communication with the straight chamber (111); a drying and conveying device (20) for transporting phosphogypsum is arranged in the drying chamber (11); a feeding device (30) for feeding phosphogypsum to the drying and conveying device (20) is arranged on the outer wall of the arc-shaped chamber (112); a crushing and feeding device (40) is arranged in the straight chamber (111) and at one end of the straight chamber (111) close to the rotary kiln (10); the crushing and feeding device (40) is used to convey the phosphogypsum dried by the drying and conveying device (20) to the rotary kiln (10); The drying and conveying device (20) comprises an annular slide rail (21) arranged on the inner wall of the drying chamber (11), an n-shaped frame (22) slidably connected to the annular slide rail (21) at the top, a transmission chain (23) arranged on the top of the inner wall of the drying chamber (11) and used to drive a plurality of n-shaped frames (22) to move, a V-shaped leak hole material box (221) arranged at the bottom of the n-shaped frame (22), a leak hole pressure plate (24) slidably connected to both sides of the n-shaped frame (22), and a V-shaped leak hole material box (221) arranged at the bottom of the n-shaped frame (22). A leak pad (25) is inside the material box (221) and the top is connected to the bottom of the leak pressure plate (24) by multiple ropes, an elastic lifting component (26) is symmetrically arranged on both sides of the n-shaped frame (22) and the bottom end is connected to the top of the leak pressure plate (24), and two limiting guide plate components (27) are symmetrically arranged on the outer wall of the arc chamber (112) and the execution end extends into the arc chamber (112), and the limiting guide plate components (27) are used to apply downward pressure to the leak pressure plate (24).

2. The production equipment of phosphogypsum calcined building gypsum according to claim 1, characterized in that: The position limiting guide plate component (27) comprises a slideway hole (271) which is penetrated through the outer wall of the arc-shaped cabin (112) and is arranged in an inclined manner, an L-shaped plate (272) with one end extending into the arc-shaped cabin (112) through the slideway hole (271), and a pneumatic cylinder (273) which is arranged on the outer wall of the L-shaped plate (272) and has an execution end which penetrates through the L-shaped plate (272) and is connected to the outer wall of the arc-shaped cabin (112).

3. The production equipment of phosphogypsum calcined building gypsum according to claim 1, characterized in that: Two locking components (28) are symmetrically arranged on the inner wall of the N-shaped frame (22), and the locking components (28) include a limiting boss (281) arranged on the inner wall of the N-shaped frame (22).

4. The production equipment of phosphogypsum calcined building gypsum according to claim 1, characterized in that: The outer wall of the straight cabin (111) is symmetrically provided with two unlocking components (29) whose execution ends penetrate the straight cabin (111) and extend into the straight cabin (111). The unlocking components (29) are located on a side of the crushing and feeding device (40) away from the rotary kiln (10). The unlocking components (29) include a driving cylinder (291) which is provided on the outer wall of the straight cabin (111) and whose execution ends penetrate the straight cabin (111), a push rod (292) which is provided on the execution end of the driving cylinder (291), and a through hole (293) which is provided on the outer wall of the n-shaped frame (22) and corresponds to the position of the push rod (292).

5. The production equipment of phosphogypsum calcined building gypsum according to claim 1, characterized in that: The elastic lifting component (26) includes a first positioning plate (261) arranged on the outer wall of the n-shaped frame (22), a second positioning plate (262) arranged on the leakage hole pressure plate (24), and a spring (263) arranged between the first positioning plate (261) and the second positioning plate (262).

6. The production equipment of phosphogypsum calcined building gypsum according to claim 1, characterized in that: The feeding device (30) includes a feeding pipe (31) whose one end is connected to the outer wall of the arc-shaped cabin (112), a transmission pipe (32) slidably connected to the inner wall of the feeding pipe (31), a power auger (33) arranged in the transmission pipe (32), a feeding hopper (34) whose bottom is connected to the outer wall of the transmission pipe (32), a second linear module (35) arranged on the outer wall of the feeding pipe (31) and used to drive the transmission pipe (32) to move, a first discharge pipe (36) whose one end is connected to the outer wall of the transmission pipe (32) and is located at one end of the transmission pipe (32) away from the feed hopper (34), a second discharge pipe (37) slidably connected to the inner wall of the first discharge pipe (36), and a telescopic cylinder (38) arranged at the end of the transmission pipe (32) and used to drive the second discharge pipe (37) to move.

7. The production equipment for calcining phosphogypsum for building gypsum according to claim 1, characterized in that: The crushing and feeding device (40) comprises a grinding component (41), a feeding component (42) and a striking component (43) which are arranged in the straight cabin (111) and in sequence in a direction extending away from the rotary kiln (10); the feeding component (42) comprises a positioning box (421) arranged on the outer wall of the straight cabin (111), a first linear module (422) arranged in the positioning box (421), a moving rod (423) having one end connected to an execution end of the first linear module (422) and the other end passing through the straight cabin (111) and extending into the straight cabin (111), a conveying plate (424) whose bottom is connected to the top of the moving rod (423), and two lifting frames (425) symmetrically arranged at one end of the conveying plate (424) away from the grinding component (41).

8. The production equipment for calcining phosphogypsum building plaster according to claim 7, characterized in that: The grinding component (41) comprises a grinding rod (411) arranged in the straight cabin (111), a power motor (412) arranged on the outer wall of the straight cabin (111), and a reducer (413) arranged on the outer wall of the straight cabin (111) and connected to the output end of the power motor (412), wherein the output end of the reducer (413) is connected to the grinding rod (411).

9. The production equipment for calcining phosphogypsum building plaster according to claim 7, characterized in that: The striking component (43) includes a positioning tube (431) whose one end is connected to the outer wall of the straight cabin (111), a moving block (432) slidably connected to the inner wall of the positioning tube (431), a third linear module (433) arranged on the outer wall of the positioning tube (431) and used to drive the moving block (432) to move, a power cylinder (434) arranged at the end of the positioning tube (431), and a striking plate (435) arranged at the execution end of the power cylinder (434).

10. The production equipment for calcining phosphogypsum building plaster according to claim 8, characterized in that: The outer wall of the grinding rod (411) is provided with a plurality of inclined protrusions (4111) in an annular array.

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