A sodium m-nitrobenzene sulfonate processing and drying device and method

Abstract

The present invention relates to the technical field of material drying, and in particular to a sodium m-nitrobenzene sulfonate processing and drying device and method, which is completed by a sodium m-nitrobenzene sulfonate processing and drying device, and the sodium m-nitrobenzene sulfonate processing and drying device comprises a support frame, a working barrel, a feed port, a discharge port, a heating partition, a circulating air drying mechanism, a splitting and spreading mechanism, a blocking mechanism, and a grinding and discharging mechanism. The circulating air drying mechanism, the splitting and spreading mechanism, the blocking mechanism, and the grinding and discharging mechanism adopted by the sodium m-nitrobenzene sulfonate processing and drying device and method provided by the present invention cooperate, and the air in the working barrel can be dried and circulated by layered drying, and filter cake fragments with higher humidity and small particles with lower humidity can be dried separately, and multiple blocking rods can be controlled to freely block multiple discharge holes, so as to facilitate the grinding and discharging of small particles in the lower layer, effectively improve the drying efficiency and drying effect, and ensure product quality.

Description

Technical Field

[0001] The invention relates to the technical field of material drying, and in particular to a sodium m-nitrobenzene sulfonate processing drying device and method. Background Art

[0002] Sodium m-nitrobenzene sulfonate is an important chemical raw material, widely used in dyes, medicines, pesticides and other fields. In its production process, a sodium benzene sulfonate solution is first obtained through a sulfonation reaction, and a mixed acid composed of nitric acid and concentrated sulfuric acid is slowly added to the sodium benzene sulfonate solution as a nitrating agent to obtain m-nitrobenzene sulfonic acid through a nitration reaction, and finally a filter cake is obtained through filtration, and then the filter cake is dried to obtain sodium m-nitrobenzene sulfonate. Since the hydrate of sodium m-nitrobenzene sulfonate has high hygroscopicity at room temperature, it is easy to absorb moisture in the air, thereby affecting the quality and stability of the product. The final drying step is crucial.

[0003] In the process of drying filter cakes, the thickness and shape of the filter cakes usually result in a small contact area between hot air and water. The evaporation rate of water is limited by the surface of the filter cakes. Different parts of the filter cakes may be unevenly dried, over-dried or not dried due to uneven heat and air flow, thus affecting the quality of the final product. In addition, due to the low drying efficiency, traditional drying devices often take a long time to complete the drying process, resulting in increased energy consumption. Especially in large-scale production, long-term drying will significantly increase production costs. Summary of the invention

[0004] Technical problem to be solved: The present invention provides a sodium m-nitrobenzene sulfonate processing and drying device and method, which can solve the above-mentioned problems.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution, a sodium m-nitrobenzene sulfonate processing and drying device, including a support frame, a working barrel is installed on the support frame, a feed port is opened in the middle of the outer wall of the working barrel, a discharge port is opened at the lower end of the working barrel, and two upper and lower heating partitions are evenly installed on the inner wall of the working barrel. A circulating air drying mechanism is arranged at the positions of the upper and lower heating partitions of the working barrel, a splitting and spreading mechanism is arranged at the position of the working barrel corresponding to the upper heating partition, a blocking mechanism is jointly arranged at the positions of the working barrel and the support frame corresponding to the lower heating partition, and a grinding and discharge mechanism is also arranged at the position of the working barrel corresponding to the lower heating partition.

[0006] The splitting and spreading mechanism comprises a hollow shaft rotatably mounted in the middle of the inner wall of the upper end of the working barrel, a mounting frame is mounted on the inner wall of the upper end of the working barrel on the right side of the hollow shaft, a U-shaped groove is left at the left end of the mounting frame, an intermittent rotating part is commonly provided on the hollow shaft, the working barrel and the mounting frame, a splitting part is commonly provided on the hollow shaft and the intermittent rotating part, and a spreading part is commonly provided on the splitting part and the working barrel. The grinding and unloading mechanism comprises a circular opening opened at the lower end of the working barrel and the middle of the lower heating partition, a conical rod is rotatably mounted in the circular opening, a rotating unloading part is commonly provided on the lower end of the working barrel and the conical rod, and a grinding and cleaning part is provided on the upper side of the conical rod.

[0007] Preferably, the blocking mechanism includes an annular cone plate 1 which is slidably installed on the inner wall of the working barrel at a position below the lower heating partition, an annular cone plate 2 is slidably sleeved on the outer wall of the conical rod corresponding to the position of the annular cone plate 1, a plurality of support rods evenly distributed in a circle are commonly installed between the annular cone plate 1 and the annular cone plate 2, a plurality of blocking rods are evenly installed on the upper ends of the plurality of support rods, two left and right arc plates are installed on the inner wall of the working barrel at a position below the annular cone plate, the upper ends of the two left and right arc plates are connected to the annular cone plate 1 through a plurality of tension springs, a No. 1 motor is installed on both the front and rear sides of the upper end of the support frame through a motor seat, the output shaft of the No. 1 motor rotates through the interior of the working barrel and is fixedly connected to a cam, and the front and rear cams roll together and contact the annular cone plate 1.

[0008] Preferably, the circulating air-drying mechanism includes air vents on the left side of the outer wall of the working barrel at positions close to the upper and lower heating baffles respectively, and air vents on the right side of the outer wall of the working barrel at positions away from the upper and lower heating baffles respectively, filters are installed in the multiple air vents, the two air vents on the left side are commonly connected to a connecting pipe, the two air vents on the right side are also commonly connected to a connecting pipe, the rear sides of the left and right connecting pipes are respectively connected to arc pipe 1, an air pump and a steam recovery device are respectively installed on the outer wall of the working barrel through mounting seats, and the ends of the two arc pipes 1 away from the corresponding connecting pipes are respectively connected to the air pump and the steam recovery device, and the air pump and the steam recovery device are connected through arc pipe 2.

[0009] Preferably, the intermittent rotating part includes a turntable rotatably installed in a U-shaped groove of a mounting frame, a cam groove is opened on the outer wall of the turntable, the cam groove is composed of a spiral groove and an annular groove, a plurality of pulleys evenly distributed in a circle are rotatably installed on the outer wall of the hollow shaft, a transmission shaft is rotatably installed on the inner wall of the U-shaped groove of the mounting frame, the turntable is fixedly sleeved on the transmission shaft, a rectangular through hole is opened at the upper end of the working barrel corresponding to the front side of the mounting frame, a sealing cover plate is installed at the front end of the mounting frame corresponding to the rectangular through hole, the upper end of the sealing cover plate is fixedly connected to the inner wall of the upper end of the working barrel, a No. 2 motor is installed in the sealing cover plate through a motor seat, and the output shaft of the No. 2 motor rotates through the inside of the mounting frame and is fixedly connected to the transmission shaft.

[0010] Preferably, the dividing part includes a connecting shaft slidably installed on the inner wall of the hollow shaft. There are two guiding slide bars, front and rear, installed on the inner wall of the hollow shaft. There are two guiding sliding grooves, front and rear, opened on the outer wall of the connecting shaft. The two guiding slide bars, front and rear, are respectively slidably connected in the corresponding guiding sliding grooves. A support plate is installed at the lower end of the connecting shaft. A plurality of installation sliding grooves are evenly opened on the left and right sides at the lower end of the support plate. The plurality of installation sliding grooves on the left and right sides are arranged in a left-right staggered manner. And a plurality of cutting blades are slidably installed in the plurality of installation sliding grooves. C-shaped vertical plates are arranged at both the left and right ends of the support plate. A plurality of tension springs are connected between the two C-shaped vertical plates, left and right. One end of each of the plurality of cutting blades facing the corresponding installation sliding groove is installed with a connecting rod. One end of each of the plurality of connecting rods away from the corresponding cutting blade is fixedly connected to the corresponding C-shaped vertical plate. An annular sleeve is fixedly sleeved on the outer wall of the connecting shaft. Cam sliding grooves are opened at both the front and rear ends of the turntable. Support sliding rods are slidably installed in the cam sliding grooves. Support connecting rods are hinged on the inner walls at both the front and rear ends of the U-shaped groove of the mounting frame. The support sliding rods on the same side rotatably penetrate through the support connecting rods. One end of the two support connecting rods, front and rear, close to the annular sleeve is hinged to the annular sleeve.

[0011] Preferably, the spreading part includes a rectangular avoidance opening opened at the lower end of the connecting shaft. A circular sliding hole communicating with the rectangular avoidance opening is opened at the upper end of the connecting shaft. And an annular installation groove with a diameter larger than that of the circular sliding hole is opened at the upper end of the connecting shaft. Extension plates are installed at the positions corresponding to the rectangular avoidance opening at the upper ends of the two C-shaped vertical plates, left and right. Trapezoidal pushing plates are symmetrically installed at the upper ends of the two extension plates, left and right. A semi-circular head pressing rod is slidably installed in the circular sliding hole. The upper end of the semi-circular head pressing rod slidably penetrates through the upper end of the working barrel. And an annular installation plate is fixedly sleeved on the outer wall of the semi-circular head pressing rod at the position above the annular installation groove. The lower end of the annular installation plate is connected to the inner wall of the annular installation groove through a plurality of compression springs. A rectangular installation groove is opened at the upper end of the semi-circular head pressing rod. A rack is installed in the rectangular installation groove. An incomplete gear is arranged on the upper end of the working barrel on the right side of the semi-circular head pressing rod. The incomplete gear is intermittently engaged with the rack. Two rotating shafts, left and right, are arranged on the upper end of the working barrel above the rectangular through hole. The front and rear sides of the two rotating shafts, left and right, are fixedly connected to the working barrel through bearing seats. And the two rotating shafts, left and right, are connected by a transmission belt. The right rotating shaft and the transmission shaft are connected by a transmission belt. The rear end of the left rotating shaft is fixedly connected to the incomplete gear.

[0012] Preferably, the grinding and cleaning part includes a circular installation hole opened at the lower end of the conical rod. Two support shafts, left and right, are rotatably penetrated and installed on the upper side of the outer wall of the conical rod. A grinding rod and a brush roller are respectively installed at the opposite ends of the two support shafts, left and right. Bevel gears one are installed at the opposite ends of the two support shafts, left and right. A connecting frame fixedly connected to the working barrel is rotatably installed at the lower end of the conical rod. A circular vertical rod is installed at the upper end of the connecting frame. A bevel gear two is installed at the upper end of the circular vertical rod. The two bevel gears one, left and right, are both meshed with the bevel gear two. And the middle part of the outer wall of the circular vertical rod is fixedly connected to the inner wall of the circular installation hole through a mounting disc.

[0013] Preferably, the rotating unloading part includes a plurality of scraper plates evenly distributed in a circle installed on the outer wall of the tapered rod at the upper end of the inner wall of the lower end of the working barrel, a passive gear ring is fixedly sleeved on the lower end of the outer wall of the tapered rod, a driving gear is rotatably installed on the lower end of the working barrel on the right side of the passive gear ring, the driving gear is meshed with the passive gear ring, and a No. 3 motor is installed together with the working barrel and the lower end of the connecting frame through the motor seat, and the output shaft of the No. 3 motor is fixedly connected to the driving gear.

[0014] Preferably, a plurality of discharge holes 1 are evenly opened on the upper heating baffle, and a plurality of discharge holes 2 are opened on the lower heating baffle at positions corresponding to the plurality of blocking rods. The diameter of discharge hole 1 is larger than the diameter of discharge hole 2. A semi-circular baffle plate is hinged in the feed port, and a discharge baffle plate is installed at the position of the discharge port corresponding to the lower end of the working barrel.

[0015] Preferably, the present invention also provides a sodium m-nitrobenzene sulfonate processing and drying method, which is completed by using a sodium m-nitrobenzene sulfonate processing and drying device, and includes the following steps: S1: loading, placing the sodium m-nitrobenzene sulfonate filter cake from the feed inlet onto the upper heating partition.

[0016] S2: Preliminary drying: the filter cake on the upper heating partition is continuously air-dried by a circulating air-drying mechanism.

[0017] S3: Splitting and spreading: the filter cake is intermittently cut and spread by a splitting and spreading mechanism to obtain sodium m-nitrobenzene sulfonate fragments of sufficient size, until all the sodium m-nitrobenzene sulfonate fragments of sufficient size fall downward from a plurality of discharge holes onto the lower heating partition.

[0018] S4: Grinding, through the cooperation of the blocking mechanism and the grinding and feeding mechanism, the sodium m-nitrobenzene sulfonate fragments on the lower heating partition are ground and crushed to obtain sodium m-nitrobenzene sulfonate powder.

[0019] S5: Secondary drying: the filter cake on the lower heating partition is continuously air-dried by the circulating air-drying mechanism. After the air-drying is completed, the blocking mechanism is controlled to be separated from the lower heating partition, and the sodium m-nitrobenzene sulfonate powder falls downward from the multiple discharge holes to the bottom of the working barrel.

[0020] S6: taking the material, the dried sodium m-nitrobenzene sulfonate powder is discharged from the discharge port through the grinding discharge mechanism.

[0021] Beneficial effects: 1. The circulating air-drying mechanism adopted in the present invention can dry and circulate the air in the working barrel, and the simultaneous thermal drying and air-drying are used to effectively improve the drying efficiency, and avoid the problem that the air in the working barrel absorbs moisture and affects the drying effect during the drying process of the sodium m-nitrobenzene sulfonate filter cake.

[0022] 2. The splitting and spreading mechanism and the circulating air-drying mechanism adopted in the present invention cooperate to control the intermittent rotation of multiple cutting blades around the hollow shaft while performing the up and down reciprocating separation work on the filter cake. At the same time, the filter cakes on both sides of the split can be spread out to avoid the small contact area between the hot air and the moisture contained in the filter cake. The evaporation rate of the moisture is limited by the surface of the filter cake, which may cause uneven drying, over-drying or under-drying, affecting the quality of the final product.

[0023] 3. The circulating air drying mechanism, splitting and spreading mechanism, blocking mechanism and grinding and feeding mechanism adopted in the present invention cooperate with each other and adopt a layered drying method, so as to dry and circulate the air in the working barrel, and dry the filter cake fragments with higher humidity and the small particles with lower humidity respectively, and can control multiple blocking rods to freely block multiple feeding holes, so as to facilitate the grinding and feeding of the small particles in the lower layer, effectively improve the drying efficiency and drying effect, and ensure the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the sodium m-nitrobenzene sulfonate processing and drying device of the present invention.

[0026] Figure 2 The present invention is a method flow chart of the sodium m-nitrobenzene sulfonate processing and drying method.

[0027] Figure 3 It is a schematic diagram of the first partial cross-section stereoscopic structure of the sodium m-nitrobenzene sulfonate processing and drying device of the present invention.

[0028] Figure 4 It is a schematic diagram of the second partial cross-section stereoscopic structure of the sodium m-nitrobenzene sulfonate processing and drying device of the present invention.

[0029] Figure 5 It is a partial cross-sectional three-dimensional structural schematic diagram of the splitting and spreading mechanism in the sodium m-nitrobenzene sulfonate processing and drying device of the present invention (without the sealing cover plate).

[0030] Figure 6 It is a semi-sectioned three-dimensional structural schematic diagram of the splitting and spreading mechanism in the sodium m-nitrobenzene sulfonate processing and drying device of the present invention.

[0031] Figure 7 It is a three-dimensional structural schematic diagram of a turntable in the sodium m-nitrobenzene sulfonate processing and drying device of the present invention.

[0032] Figure 8 It is a three-dimensional structural schematic diagram of the splitting and spreading mechanism in the sodium m-nitrobenzene sulfonate processing and drying device of the present invention (excluding the mounting frame, the sealing cover plate and the transmission shaft).

[0033] Fig. 9 It is a schematic three-dimensional structure diagram at the hollow shaft and the connecting shaft in the m-nitrobenzenesulfonic acid sodium processing and drying device of the present invention.

[0034] Fig.10 It is a schematic half-sectional three-dimensional structure diagram (removing the dividing and spreading mechanism) of the m-nitrobenzenesulfonic acid sodium processing and drying device of the present invention.

[0035] Fig.11 It is the present invention between Fig.10 An enlarged view of the X position.

[0036] Fig.12 It is the present invention between Fig.10 An enlarged view of the Y position.

[0037] Fig.13 It is the present invention between Fig.10 An enlarged view of the Z position.

[0038] In the figure: 1, support frame; 2, working barrel; 3, heating partition board; 4, circulating air drying mechanism; 41, ventilation port; 42, filter screen; 43, connecting pipe; 44, arc pipe one; 45, air pump; 46, steam recovery device; 47, arc pipe two; 5, dividing and spreading mechanism; 51, hollow shaft; 52, mounting frame; 53, intermittent rotation part; 531, turntable; 532, pulley; 533, transmission shaft; 534, sealing cover plate; 535, second motor; 536, cam groove; 54, dividing part; 541, connecting shaft; 542, guiding slide bar; 543, guiding chute; 544, support plate; 545, mounting chute; 546, cutting piece; 547, U-shaped vertical plate; 548, connecting rod; 549, annular sleeve; 550, cam chute; 551, support slide bar; 552, support connecting rod; 56, spreading part; 561, rectangular avoidance opening; 562, circular sliding hole; 563, annular mounting groove; 564, extension plate; 565, trapezoidal pushing plate; 566, semi-circular head pressing rod; 567, annular mounting plate; 568, rack; 569, incomplete gear; 570, rotating shaft; 6, blocking mechanism; 61, annular conical plate one; 62, annular conical plate two; 63, support rod; 64, blocking rod; 65, arc plate; 66, first motor; 67, cam; 7, grinding and feeding mechanism; 71, circular opening; 72, conical rod; 73, rotating feeding part; 731, scraping plate; 732, passive gear ring; 733, driving gear; 734, third motor; 74, grinding and cleaning part; 741, circular mounting hole; 742, support shaft; 743, grinding rod; 744, brush roller; 745, bevel gear one; 746, connecting frame; 747, circular vertical rod; 748, bevel gear two; 8, feeding hole one; 9, feeding hole two; 10, semi-circular baffle; 11, feeding baffle; 12, feed inlet; 13, discharge port. Detailed implementation manners

[0039] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0040] See also Figure 1 and Figure 3 A sodium m-nitrobenzene sulfonate processing and drying device comprises a support frame 1, a working barrel 2 is installed on the support frame 1, a feeding port 12 is opened in the middle of the outer wall of the working barrel 2, a discharge port 13 is opened at the lower end of the working barrel 2, and two upper and lower heating partitions 3 are evenly installed on the inner wall of the working barrel 2. A circulating air drying mechanism 4 is arranged at the position of the working barrel 2 corresponding to the upper and lower heating partitions 3, a splitting and spreading mechanism 5 is arranged at the position of the working barrel 2 corresponding to the upper heating partition 3, a blocking mechanism 6 is jointly arranged at the position of the working barrel 2 and the support frame 1 corresponding to the lower heating partition 3, and a grinding and discharge mechanism 7 is also arranged at the position of the working barrel 2 corresponding to the lower heating partition 3.

[0041] See also Figure 1 , Figure 4 , Fig.10 and Fig.11 A plurality of discharge holes 8 are evenly arranged on the upper heating baffle 3, and a plurality of discharge holes 9 are arranged at positions corresponding to the plurality of blocking rods 64 on the lower heating baffle 3. The diameter of the discharge hole 8 is larger than the diameter of the discharge hole 9. A semi-circular baffle plate 10 is hinged in the feed port 12, and a discharge baffle plate 11 is installed at the position corresponding to the discharge port 13 at the lower end of the working barrel 2.

[0042] See also Figure 1 , Figure 3 , Fig.10 and Fig.12 The circulating air-drying mechanism 4 includes air vents 41 on the left side of the outer wall of the working barrel 2, which are respectively close to the upper and lower heating baffles 3, and air vents 41 on the right side of the outer wall of the working barrel 2, which are respectively far away from the upper and lower heating baffles 3. Filters 42 are installed in the multiple air vents 41. The two air vents 41 on the left side are commonly connected with a connecting pipe 43, and the two air vents 41 on the right side are also commonly connected with a connecting pipe 43. The rear sides of the left and right connecting pipes 43 are respectively connected with arc pipes 1 44. An air pump 45 and a steam recovery device 46 are respectively installed on the outer wall of the working barrel 2 through mounting seats, and the ends of the left and right arc pipes 1 44 away from the corresponding connecting pipes 43 are respectively connected to the air pump 45 and the steam recovery device 46, and the air pump 45 and the steam recovery device 46 are connected through arc pipe 2 47.

[0043] First, the staff opens the semi-annular baffle plate 10, and puts the sodium m-nitrobenzene sulfonate filter cake from the feed port 12 onto the upper heating baffle plate 3, and then closes the semi-annular baffle plate 10. It should be noted that a heating device is provided on the inner wall of the working barrel 2, and then the heating device and the upper and lower heating baffle plates 3 are controlled to start heating, so as to dry the filter cake. At the same time, the air pump 45 and the steam recovery device 46 are controlled to cooperate. At this time, the air in the working barrel 2 will be circulated and transported through the connecting pipes 43, arc pipe one 44 and arc pipe two 47 on the left and right sides, so as to achieve the effect of drying and circulating the air in the working barrel 2. During this period, the water contained in the filter cake will be evaporated and brought out by the air in the working barrel 2 to the steam recovery device 46, and the water will be extracted by the steam recovery device 46. The circulating air-drying mechanism 4 can dry and circulate the air in the working barrel 2, and the simultaneous use of heat drying and air drying can effectively improve the drying efficiency, and avoid the problem that the air in the working barrel 2 absorbs moisture and affects the drying effect during the drying process of the sodium m-nitrobenzene sulfonate filter cake.

[0044] See also Figure 3 , Figure 5 , Figure 7 and Figure 8 The splitting and spreading mechanism 5 includes a hollow shaft 51 rotatably installed in the middle of the inner wall of the upper end of the working barrel 2, a mounting frame 52 is installed on the inner wall of the upper end of the working barrel 2 on the right side of the hollow shaft 51, and a U-shaped groove is left at the left end of the mounting frame 52. An intermittent rotating part 53 is commonly provided on the hollow shaft 51, the working barrel 2 and the mounting frame 52, a splitting part 54 is commonly provided on the hollow shaft 51 and the intermittent rotating part 53, and a spreading part 56 is commonly provided on the splitting part 54 and the working barrel 2. The intermittent rotating part 53 includes a turntable 531 rotatably installed in the U-shaped groove of the mounting frame 52, a cam groove 536 is opened on the outer wall of the turntable 531, the cam groove 536 is composed of a spiral groove and an annular groove, a plurality of pulleys 532 evenly distributed in a circle are rotatably installed on the outer wall of the hollow shaft 51, a transmission shaft 533 is rotatably installed on the inner wall of the U-shaped groove of the mounting frame 52, the turntable 531 is fixedly sleeved on the transmission shaft 533, a rectangular through hole is opened at the upper end of the working barrel 2 corresponding to the front side of the mounting frame 52, a sealing cover plate 534 is installed at the front end of the mounting frame 52 corresponding to the rectangular through hole, the upper end of the sealing cover plate 534 is fixedly connected to the inner wall of the upper end of the working barrel 2, a No. 2 motor 535 is installed in the sealing cover plate 534 through a motor seat, and the output shaft of the No. 2 motor 535 rotates through the inside of the mounting frame 52 and is fixedly connected to the transmission shaft 533.

[0045] See also Figure 5 and Figure 7-Figure 9, the dividing part 54 includes a connecting shaft 541 slidably installed on the inner wall of the hollow shaft 51. Two guiding slide bars 542 are installed on the inner wall of the hollow shaft 51, and two guiding slide grooves 543 are formed on the outer wall of the connecting shaft 541. The two guiding slide bars 542 are respectively slidably connected in the corresponding guiding slide grooves 543. A support plate 544 is installed at the lower end of the connecting shaft 541. A plurality of installation slide grooves 545 are evenly formed on the left and right sides of the lower end of the support plate 544. The plurality of installation slide grooves 545 on the left and right sides are arranged in a left-right staggered manner, and a cutting blade 546 is slidably installed in each of the plurality of installation slide grooves 545. C-shaped vertical plates 547 are arranged at both the left and right ends of the support plate 544. A plurality of tension springs are connected between the left and right C-shaped vertical plates 547. A connecting rod 548 is installed at one end of each of the plurality of cutting blades 546 facing the corresponding installation slide groove 545. One ends of the plurality of connecting rods 548 away from the corresponding cutting blades 546 are respectively fixedly connected to the corresponding C-shaped vertical plates 547. An annular sleeve 549 is fixedly sleeved on the outer wall of the connecting shaft 541. Cam slide grooves 550 are formed at both the front and rear ends of the turntable 531. A support slide rod 551 is slidably installed in the cam slide groove 550. Support connecting rods 552 are hinged on the inner walls of the front and rear ends of the U-shaped groove of the mounting frame 52. The support slide rod 551 on the same side rotatably penetrates through the support connecting rod 552. One ends of the front and rear support connecting rods 552 close to the annular sleeve 549 are respectively hinged to the annular sleeve 549.

[0046] Refer to Figure 5 , Figure 6 and Fig. 9, the spreading part 56 includes a rectangular avoidance opening 561 formed at the lower end of the connecting shaft 541, a circular sliding hole 562 formed at the upper end of the connecting shaft 541 and communicating with the rectangular avoidance opening 561, and an annular installation groove 563 formed at the upper end of the connecting shaft 541 with a diameter larger than that of the circular sliding hole 562. Extension plates 564 are installed at the upper ends of the left and right U-shaped vertical plates 547 corresponding to the position of the rectangular avoidance opening 561. Trapezoidal pushing plates 565 are symmetrically installed at the upper ends of the left and right extension plates 564. A semi-circular head pressing rod 566 is slidably installed in the circular sliding hole 562. The upper end of the semi-circular head pressing rod 566 slidably penetrates through the upper end of the working barrel 2. An annular installation plate 567 is fixedly sleeved on the outer wall of the semi-circular head pressing rod 566 at a position above the annular installation groove 563. The lower end of the annular installation plate 567 is connected to the inner wall of the annular installation groove 563 through a plurality of compression springs. A rectangular installation groove is formed at the upper end of the semi-circular head pressing rod 566, and a rack 568 is installed in the rectangular installation groove. An incomplete gear 569 is arranged on the upper end of the working barrel 2 on the right side of the semi-circular head pressing rod 566. The incomplete gear 569 is intermittently engaged with the rack 568. Two rotating shafts 570 are arranged on the upper end of the working barrel 2 above the rectangular through hole. The front and rear sides of the left and right rotating shafts 570 are fixedly connected to the working barrel 2 through bearing seats, and the left and right rotating shafts 570 are connected by a transmission belt. The right rotating shaft 570 and the transmission shaft 533 are connected by a transmission belt. The rear end of the left rotating shaft 570 is fixedly connected to the incomplete gear 569.

[0047] When the semi-circular baffle 10 is closed, the drive shaft 533 is rotated by the second motor 535. The drive shaft 533 drives the turntable 531 to rotate. The turntable 531 is intermittently engaged with the hollow shaft 51 through the cam groove 536 and a plurality of pulleys 532, driving the hollow shaft 51 to rotate intermittently. At the same time, under the combined action of the front and rear cam chute 550 and the support slide rod 551, the front and rear support connecting rods 552 will jointly drive the annular sleeve 549 to move up and down reciprocally. The annular sleeve 549 drives the support plate 544 to move up and down reciprocally through the connecting shaft 541. The support plate 544 drives a plurality of cutting blades 546 to move up and down reciprocally, thereby realizing the intermittent segmentation of the filter cake. During this period, whenever the plurality of cutting blades 546 move downward to fit the position of the upper heating partition plate 3, under the action of the compression spring, the connecting shaft 541 drives the semi-circular head pressing rod 566 to move downward through the annular mounting plate 567. And the drive shaft 533 drives the left and right rotating shafts 570 to rotate synchronously through belt transmission. The left rotating shaft 570 drives the incomplete gear 569 to rotate synchronously. Then, through the transmission between the incomplete gear 569 and the rack 568, the semi-circular head pressing rod 566 is driven to move downward continuously. At this time, the semi-circular head pressing rod 566 will push the left and right trapezoidal pushing plates 565 away from each other. The left and right trapezoidal pushing plates 565 drive the corresponding C-shaped vertical plates 547 away from each other through the corresponding extension plates 564 respectively. The left and right C-shaped vertical plates 547 drive the corresponding cutting blades 546 away from each other through the corresponding connecting rods 548 respectively. Thus, while realizing the intermittent segmentation of the filter cake, the left and right cutting blades 546 are controlled to move away from each other, achieving the effect of spreading the cut filter cake on both sides.

[0048] When the connecting shaft 541 drives the plurality of cutting blades 546 to move upward, the incomplete gear 569 will also continue to rotate until it disengages from the rack 568. Under the action of the compression spring, the annular mounting plate 567 drives the semi-circular head pressing rod 566 to move upward to return to its original position. The segmentation and spreading mechanism 5 and the circulating air drying mechanism 4 cooperate, which can control the plurality of cutting blades 546 to intermittently rotate around the hollow shaft 51 while performing the up and down reciprocating separation work on the filter cake. At the same time, it can also perform the spreading work on the filter cake on both sides after segmentation, avoiding the phenomenon that the contact area between the hot air and the moisture contained in the filter cake is small, the evaporation rate of the moisture is limited by the surface of the filter cake, and there may be uneven drying, over-drying or under-drying, which affects the quality of the final product.

[0049] See Figure 4 and Figure 10-12The grinding and unloading mechanism 7 includes a circular opening 71 opened at the lower end of the working barrel 2 and the middle of the lower heating partition 3. A conical rod 72 is rotatably installed in the circular opening 71. A rotating unloading part 73 is commonly provided on the lower end of the working barrel 2 and the conical rod 72. A grinding and cleaning part 74 is provided on the upper side of the conical rod 72. The grinding and cleaning part 74 includes a circular mounting hole 741 opened at the lower end of the conical rod 72, and two left and right support shafts 742 are rotatably installed on the upper side of the outer wall of the conical rod 72, and a grinding rod 743 and a brush roller 744 are respectively installed on the opposite ends of the left and right support shafts 742, and bevel gears 1 745 are installed on the opposite ends of the left and right support shafts 742. A connecting frame 746 fixedly connected to the working barrel 2 is rotatably installed at the lower end of the conical rod 72, and a circular vertical rod 747 is installed on the upper end of the connecting frame 746. A bevel gear 2 748 is installed on the upper end of the circular vertical rod 747. The left and right bevel gears 1 745 are both meshed with bevel gear 2 748, and the middle part of the outer wall of the circular vertical rod 747 is fixedly connected to the inner wall of the circular mounting hole 741 through a mounting plate.

[0050] See also Figure 1 , Figure 4 , Fig.11 and Fig.12 The blocking mechanism 6 includes an annular cone plate 61 slidably installed on the inner wall of the working barrel 2 at the lower side of the lower heating partition 3, an annular cone plate 62 is slidably sleeved on the outer wall of the conical rod 72 corresponding to the position of the annular cone plate 61, a plurality of support rods 63 uniformly distributed in a circumference are installed between the annular cone plate 61 and the annular cone plate 62, and a plurality of blocking rods 64 are uniformly installed on the upper ends of the plurality of support rods 63, and two left and right arc plates 65 are installed on the inner wall of the working barrel 2 at the position under the annular cone plate 61, and the upper ends of the left and right arc plates 65 are connected to the annular cone plate 61 through a plurality of tension springs, and a No. 1 motor 66 is installed on both the front and rear sides of the upper end of the support frame 1 through a motor seat, and the output shaft of the No. 1 motor 66 rotates and passes through the interior of the working barrel 2 and is fixedly connected to a cam 67, and the front and rear cams 67 roll and contact the annular cone plate 61 together.

[0051] See also Figure 4 , Fig.10 and Fig.13 The rotating unloading part 73 includes a plurality of scraper plates 731 evenly distributed in a circumference and installed on the outer wall of the tapered rod 72 at the upper end of the inner wall of the lower end of the working barrel 2. A passive gear ring 732 is fixedly sleeved on the lower end of the outer wall of the tapered rod 72. A driving gear 733 is rotatably installed on the lower end of the working barrel 2 on the right side of the passive gear ring 732. The driving gear 733 is meshed with the passive gear ring 732. A No. 3 motor 734 is installed on the lower end of the working barrel 2 and the connecting frame 746 through the motor seat. The output shaft of the No. 3 motor 734 is fixedly connected to the driving gear 733.

[0052] After the filter cake is divided for many times, enough sodium m-nitrobenzene sulfonate fragments can be obtained to pass through the discharge hole 8. During this period, the sodium m-nitrobenzene sulfonate fragments will fall downward through multiple discharge holes 8 to the lower heating partition 3. It should be noted that multiple blocking rods 64 are initially located in the corresponding discharge hole 2 9, and then the driving gear 733 and the passive gear ring 732 are controlled by the third motor 734 to drive the conical rod 72 to rotate. The conical rod 72 drives the grinding rod 743 and the brush roller 744 to rotate through the left and right support shafts 742 respectively, and drives the grinding rod 743 and the brush roller 744 to rotate around the corresponding support shaft 742 respectively through the left and right bevel gears 1 745 and 2 748, thereby achieving the effect of grinding and crushing the sodium m-nitrobenzene sulfonate fragments on the lower heating partition 3.

[0053] After obtaining the sodium m-nitrobenzene sulfonate powder, the corresponding cams 67 are controlled to rotate by the front and rear two No. 1 motors 66 respectively. Under the action of multiple tension springs, the front and rear two cams 67 jointly drive the annular cone plate 1 61 to move downward until the multiple blocking rods 64 are withdrawn and away from the corresponding discharge holes 2 9. At this time, as the brush roller 744 continues to rotate with the conical rod 72, the sodium m-nitrobenzene sulfonate powder falls downward from the multiple discharge holes 2 9 to the bottom side of the working barrel 2, and then the conical rod 72 will drive the multiple scraper plates 731 to rotate, thereby driving the dried sodium m-nitrobenzene sulfonate powder to be discharged from the discharge port 13.

[0054] See also Figure 2 In addition, the present invention also provides a sodium m-nitrobenzene sulfonate processing and drying method, which is completed by using a sodium m-nitrobenzene sulfonate processing and drying device, and includes the following steps: S1: loading, placing the sodium m-nitrobenzene sulfonate filter cake from the feed inlet 12 onto the upper heating partition 3.

[0055] S2: Preliminary drying: the filter cake on the upper heating partition 3 is continuously dried by the circulating air drying mechanism 4.

[0056] S3: Splitting and spreading, the filter cake is intermittently cut and spread through the splitting and spreading mechanism 5 to obtain sodium m-nitrobenzene sulfonate fragments of sufficient size, until all the sodium m-nitrobenzene sulfonate fragments of sufficient size fall downward from multiple discharge holes 8 onto the lower heating partition 3.

[0057] S4: Grinding, through the cooperation of the blocking mechanism 6 and the grinding and feeding mechanism 7, the sodium m-nitrobenzene sulfonate fragments on the lower heating partition 3 are ground and crushed to obtain sodium m-nitrobenzene sulfonate powder.

[0058] S5: Secondary drying: the filter cake on the lower heating partition 3 is continuously air-dried by the circulating air-drying mechanism 4. After the air-drying is completed, the blocking mechanism 6 is controlled to be separated from the lower heating partition 3, and the sodium m-nitrobenzene sulfonate powder falls downward from the multiple discharge holes 9 to the bottom side of the working barrel 2.

[0059] S6: taking the material, the dried sodium m-nitrobenzene sulfonate powder is discharged from the discharge port 13 through the grinding discharge mechanism 7.

[0060] By repeating the above steps, the drying work of the sodium m-nitrobenzene sulfonate filter cake can be repeated. The circulating air drying mechanism 4, the splitting and spreading mechanism 5, the blocking mechanism 6 and the grinding and unloading mechanism 7 cooperate with each other, and a layered drying method is adopted. The air in the working barrel 2 can be dried and circulated, and the filter cake fragments with higher humidity and the small particles with lower humidity can be dried separately. In addition, multiple blocking rods 64 can be controlled to freely block multiple unloading holes 9, which is convenient for grinding and unloading the small particles in the lower layer, effectively improving the drying efficiency and drying effect, and ensuring product quality.

[0061] In the description of the embodiments of the present invention, it should be noted that the terms: "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "outer", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention. In addition, in the description of the present invention, unless otherwise specified, "multiple", "multiple roots", and "multiple groups" mean two or more.

[0062] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sodium m-nitrobenzene sulfonate processing and drying device, comprising a support frame (1), on which a working barrel (2) is mounted, characterized in that: The working barrel (2) has a feeding port (12) in the middle of its outer wall, a discharging port (13) at its lower end, and upper and lower heating baffles (3) evenly mounted on its inner wall. A circulating air drying mechanism (4) is provided at positions of the working barrel (2) corresponding to the upper and lower heating baffles (3). A splitting and spreading mechanism (5) is provided at a position of the working barrel (2) corresponding to the upper heating baffle (3). A blocking mechanism (6) is provided at positions of the working barrel (2) and the support frame (1) corresponding to the lower heating baffle (3). A grinding and discharging mechanism (7) is also provided at a position of the working barrel (2) corresponding to the lower heating baffle (3). The splitting and spreading mechanism (5) comprises a hollow shaft (51) rotatably mounted in the middle of the inner wall of the upper end of the working barrel (2); a mounting frame (52) is mounted on the inner wall of the upper end of the working barrel (2) on the right side of the hollow shaft (51); a U-shaped groove is left at the left end of the mounting frame (52); an intermittent rotating portion (53) is commonly provided on the hollow shaft (51), the working barrel (2) and the mounting frame (52); a splitting portion (54) is commonly provided on the hollow shaft (51) and the intermittent rotating portion (53); and a spreading portion (56) is commonly provided on the splitting portion (54) and the working barrel (2); The grinding and unloading mechanism (7) comprises a circular opening (71) provided at the lower end of the working barrel (2) and the middle of the lower heating partition (3); a conical rod (72) is rotatably mounted in the circular opening (71); a rotating unloading portion (73) is provided on the lower end of the working barrel (2) and the conical rod (72); and a grinding and cleaning portion (74) is provided on the upper side of the conical rod (72); The blocking mechanism (6) comprises an annular cone plate 1 (61) slidably mounted on the inner wall of the working barrel (2) at a position below the lower heating baffle (3); an annular cone plate 2 (62) is slidably sleeved on the outer wall of the conical rod (72) at a position corresponding to the annular cone plate 1 (61); a plurality of support rods (63) evenly distributed in a circumference are mounted between the annular cone plate 1 (61) and the annular cone plate 2 (62); a plurality of blocking rods (64) are evenly mounted on the upper ends of the plurality of support rods (63); the working barrel (2) Two left and right arc plates (65) are installed on the inner wall at the position below the annular cone plate (61), and the upper ends of the left and right arc plates (65) are connected to the annular cone plate (61) through a plurality of tension springs. A No. 1 motor (66) is installed on both the front and rear sides of the upper end of the support frame (1) through a motor seat. The output shaft of the No. 1 motor (66) rotates and passes through the inside of the working barrel (2) and is fixedly connected to a cam (67). The front and rear cams (67) roll together and contact the annular cone plate (61); The intermittent rotation part (53) includes a turntable (531) rotatably installed in the U-shaped groove of the mounting frame (52). A cam groove (536) is formed on the outer wall of the turntable (531). The cam groove (536) is composed of a spiral groove and an annular groove. A plurality of pulleys (532) evenly distributed in a circle are rotatably installed on the outer wall of the hollow shaft (51). A transmission shaft (533) is rotatably installed on the inner wall of the U-shaped groove of the mounting frame (52). The turntable (531) is fixedly sleeved on the transmission shaft (533). A rectangular through hole is formed at the upper end of the working barrel (2) corresponding to the front side of the mounting frame (52). A sealing cover plate (534) is installed at the front end of the mounting frame (52) corresponding to the rectangular through hole. The upper end of the sealing cover plate (534) is fixedly connected to the inner wall of the upper end of the working barrel (2). A second motor (535) is installed in the sealing cover plate (534) through a motor base. The output shaft of the second motor (535) rotatably penetrates through the inside of the mounting frame (52) and is fixedly connected to the transmission shaft (533). The dividing part (54) includes a connecting shaft (541) slidably installed on the inner wall of the hollow shaft (51). Two guiding slide bars (542) are installed on the inner wall of the hollow shaft (51) in the front and back directions. Two guiding slide grooves (543) are formed on the outer wall of the connecting shaft (541) in the front and back directions. The two guiding slide bars (542) in the front and back directions are respectively slidably connected in the corresponding guiding slide grooves (543). A support plate (544) is installed at the lower end of the connecting shaft (541). A plurality of installation slide grooves (545) are evenly formed on the left and right sides at the lower end of the support plate (544). The plurality of installation slide grooves (545) on the left and right sides are arranged in a left-right staggered manner. Cutting blades (546) are slidably installed in the plurality of installation slide grooves (545). C-shaped vertical plates (547) are arranged at both the left and right ends of the support plate (544). A plurality of tension springs are connected between the two C-shaped vertical plates (547) on the left and right. Connecting rods (548) are installed at one end of each of the plurality of cutting blades (546) facing the corresponding installation slide groove (545). One ends of the plurality of connecting rods (548) far from the corresponding cutting blades (546) are respectively fixedly connected to the corresponding C-shaped vertical plates (547). An annular sleeve (549) is fixedly sleeved on the outer wall of the connecting shaft (541). Cam slide grooves (550) are formed at both the front and back ends of the turntable (531). Support slide rods (551) are slidably installed in the cam slide grooves (550). Support connecting rods (552) are hinged on the inner walls at both the front and back ends of the U-shaped groove of the mounting frame (52). The support slide rods (551) on the same side rotatably penetrate through the support connecting rods (552). One ends of the two support connecting rods (552) close to the annular sleeve (549) are respectively hinged to the annular sleeve (549). The unfolding part (56) includes a rectangular avoidance opening (561) formed at the lower end of the connecting shaft (541), a circular sliding hole (562) formed at the upper end of the connecting shaft (541) and communicating with the rectangular avoidance opening (561), and an annular mounting groove (563) formed at the upper end of the connecting shaft (541) with a diameter larger than that of the circular sliding hole (562). Extension plates (564) are installed at the upper ends of the left and right U-shaped vertical plates (547) corresponding to the position of the rectangular avoidance opening (561). Trapezoidal pushing plates (565) are symmetrically installed at the upper ends of the left and right extension plates (564). A semi-circular head pressing rod (566) is slidably installed in the circular sliding hole (562). The upper end of the semi-circular head pressing rod (566) slidably penetrates through the upper end of the working barrel (2). An annular mounting plate (567) is fixedly sleeved on the outer wall of the semi-circular head pressing rod (566) at a position above the annular mounting groove (563). The lower end of the annular mounting plate (567) is connected to the inner wall of the annular mounting groove (563) through a plurality of compression springs. A rectangular mounting groove is formed at the upper end of the semi-circular head pressing rod (566), and a rack (568) is installed in the rectangular mounting groove. An incomplete gear (569) is arranged on the upper end of the working barrel (2) on the right side of the semi-circular head pressing rod (566). The incomplete gear (569) meshes with the rack (568) intermittently. Two rotating shafts (570) are arranged on the upper end of the working barrel (2) above the rectangular through hole. The front and rear sides of the left and right rotating shafts (570) are fixedly connected to the working barrel (2) through bearing seats, and the left and right rotating shafts (570) are connected by a transmission belt. The right rotating shaft (570) is connected to the transmission shaft (533) by a transmission belt. The rear end of the left rotating shaft (570) is fixedly connected to the incomplete gear (569).

2. A sodium m-nitrobenzene sulfonate processing and drying device according to claim 1, characterized in that: The circulating air drying mechanism (4) includes ventilation openings (41) formed on the left side of the outer wall of the working barrel (2) respectively near the upper and lower heating partitions (3), and ventilation openings (41) formed on the right side of the outer wall of the working barrel (2) respectively away from the upper and lower heating partitions (3). Filters (42) are installed in a plurality of ventilation openings (41). A connecting pipe (43) is commonly connected to the left two ventilation openings (41), and a connecting pipe (43) is also commonly connected to the right two ventilation openings (41). Arc-shaped pipes one (44) are respectively communicated with the rear sides of the left and right connecting pipes (43). An air pump (45) and a steam recovery device (46) are respectively installed on the outer wall of the working barrel (2) through mounting seats. One ends of the two arc-shaped pipes one (44) away from the corresponding connecting pipes (43) are respectively communicated with the air pump (45) and the steam recovery device (46). The air pump (45) and the steam recovery device (46) are communicated through an arc-shaped pipe two (47).

3. A sodium m-nitrobenzene sulfonate processing and drying device according to claim 1, characterized in that: The grinding and cleaning portion (74) comprises a circular mounting hole (741) formed at the lower end of a conical rod (72); two left and right support shafts (742) are rotatably mounted on the upper side of the outer wall of the conical rod (72); a grinding rod (743) and a brush roller (744) are mounted on the opposite ends of the left and right support shafts (742); bevel gears 1 (745) are mounted on the opposite ends of the left and right support shafts (742); a connecting frame (746) fixedly connected to the working barrel (2) is rotatably mounted on the lower end of the conical rod (72); a circular vertical rod (747) is mounted on the upper end of the connecting frame (746); a bevel gear 2 (748) is mounted on the upper end of the circular vertical rod (747); the left and right bevel gears 1 (745) are meshed with the bevel gear 2 (748); and the middle portion of the outer wall of the circular vertical rod (747) is fixedly connected to the inner wall of the circular mounting hole (741) via a mounting plate.

4. A sodium m-nitrobenzene sulfonate processing and drying device according to claim 3, characterized in that: The rotating unloading part (73) comprises a plurality of scraper plates (731) evenly distributed in a circumference and mounted on the outer wall of the tapered rod (72) at the upper end of the inner wall of the lower end of the working barrel (2); a passive gear ring (732) is fixedly sleeved on the lower end of the outer wall of the tapered rod (72); a driving gear (733) is rotatably mounted on the lower end of the working barrel (2) on the right side of the passive gear ring (732); the driving gear (733) is meshed with the passive gear ring (732); and a third motor (734) is mounted on the lower end of the working barrel (2) and the connecting frame (746) through a motor seat; an output shaft of the third motor (734) is fixedly connected to the driving gear (733).

5. A sodium m-nitrobenzene sulfonate processing and drying device according to claim 1, characterized in that: A plurality of material discharge holes (8) are evenly arranged on the upper heating baffle (3), and a plurality of material discharge holes (9) are arranged on the lower heating baffle (3) at positions corresponding to the plurality of blocking rods (64). The diameter of the material discharge hole (8) is larger than the diameter of the material discharge hole (9). A semi-circular material baffle plate (10) is hingedly connected inside the material feed port (12), and a material discharge baffle plate (11) is installed at a position of the lower end of the working barrel (2) corresponding to the material discharge port (13).

6. A method for processing and drying sodium m-nitrobenzene sulfonate, characterized in that: The sodium m-nitrobenzene sulfonate processing and drying device as claimed in claim 5 is used to complete the process. The following steps are involved: S1: Loading the sodium m-nitrobenzenesulfonate filter cake onto the upper heating baffle (3) from the feed inlet (12); S2: preliminary drying, the filter cake on the upper heating partition (3) is continuously air-dried by a circulating air-drying mechanism (4); S3: Splitting and spreading, the filter cake is intermittently cut and spread by the splitting and spreading mechanism (5) to obtain sodium m-nitrobenzene sulfonate fragments of sufficient size, until all the sodium m-nitrobenzene sulfonate fragments of sufficient size fall downward from the plurality of discharge holes (8) onto the lower heating partition (3); S4: grinding, by cooperating with the blocking mechanism (6) and the grinding and feeding mechanism (7), the sodium meta-nitrobenzene sulfonate fragments on the lower heating partition (3) are ground and crushed to obtain sodium meta-nitrobenzene sulfonate powder; S5: secondary drying, the filter cake on the lower heating partition (3) is continuously air-dried by the circulating air-drying mechanism (4), and after the air-drying is completed, the blocking mechanism (6) is controlled to be separated from the lower heating partition (3), and the sodium m-nitrobenzene sulfonate powder falls downward from the plurality of discharge holes (9) to the bottom side of the working barrel (2); S6: taking the material, the dried sodium m-nitrobenzene sulfonate powder is discharged from the discharge port (13) through the grinding discharge mechanism (7).

Images