A flash dryer for thiodipropionic acid

Abstract

The application discloses a kind of thiodipropionic acid with flash dryer in antioxidant preparation technical field, it is related to thiodipropionic acid drying device field, including: stirring crushing mechanism;Pretreatment mechanism, the pretreatment mechanism includes pretreatment cylinder and discharge pipeline, the discharge pipeline is arranged at the bottom of the pretreatment cylinder for after being pretreated by pretreatment cylinder Material is transported to the inner cavity of stirring crushing mechanism connected thereto and is pulverized and dried to handle, the stirring crushing mechanism includes: drying chamber, first feeding port is arranged on the circumferential outer side wall of the drying chamber;Bellows, the bellows are arranged on the circumferential outer side wall of the drying chamber, the bellows are arranged at the lower end of the first feeding port, this kind of thiodipropionic acid with flash dryer, pretreatment is carried out to material by pretreatment cylinder, pretreated material is transported to the inner cavity of stirring crushing mechanism by discharge pipeline and is pulverized and dried to handle, improve work efficiency.

Description

Technical Field

[0001] This invention relates to the field of antioxidant preparation technology, specifically to a flash dryer for thiodipropionic acid. Background Technology

[0002] Thiodipropionic acid is produced by condensing acrylic acid and sodium sulfide in the presence of sulfuric acid, followed by acidification, standing decolorization, filtration, crystallization rinsing, and drying to obtain the final product.

[0003] The existing drying method involves placing the paste-like material in a dryer and stirring it to dry. Because the paste-like material has a high initial moisture content and viscosity, directly placing it in the dryer for stirring and drying requires a very long time, resulting in low efficiency. Therefore, how to improve the drying efficiency in the production and preparation process of thiodipropionic acid is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a flash dryer for thiodipropionic acid, in order to solve the problem mentioned in the background art that the existing method involves placing paste-like materials in a dryer for stirring and drying. Since the paste-like materials have high initial moisture content and high viscosity, directly placing them in the dryer for stirring and drying requires a very long time and is inefficient.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a flash dryer for thiodipropionic acid, comprising:

[0006] Mixing and crushing mechanism;

[0007] The pretreatment mechanism includes a pretreatment cylinder and a discharge pipe. The discharge pipe is located at the bottom of the pretreatment cylinder and is used to transport the pretreated material to the inner cavity of the connected mixing and crushing mechanism for crushing and drying.

[0008] Preferably, the stirring and crushing mechanism includes:

[0009] A drying chamber, wherein a first feed inlet is provided on the outer circumferential wall of the drying chamber;

[0010] The air box is disposed on the outer circumferential wall of the drying chamber and is located at the lower end of the first feed inlet;

[0011] A heating mechanism is disposed at the end of the air box;

[0012] A stirring mechanism is provided at the bottom of the drying chamber. The stirring mechanism includes a conical drive wheel, a first connecting shaft, a power wheel, a second connecting shaft, and a first stirring blade.

[0013] The conical drive wheel is mounted in the inner cavity of the drying chamber via a sealed bearing;

[0014] The first connecting shaft is located at the bottom of the conical drive wheel and on the outside of the drying chamber;

[0015] The drive wheel is disposed on the outer circumferential wall of the first connecting shaft;

[0016] The second connecting shaft is disposed at the end of the conical drive wheel and is disposed inside the drying chamber;

[0017] The first stirring blade is disposed on the outer circumferential wall of the second connecting shaft;

[0018] A feed tube is provided at the end of the drying chamber and communicates with the inner cavity of the drying chamber. An inner sleeve is provided at the top of the inner cavity of the feed tube, and a heat exchange tube is provided between the inner sleeve and the feed tube.

[0019] An end cap is provided at the end of the feed cylinder. The inner cavity of the end cap is provided with a screen, and the outer circumferential wall of the end cap is provided with a first discharge port.

[0020] Preferably, it further includes a gas-solid separation mechanism, which is connected to the stirring and crushing mechanism, and the gas-solid separation mechanism includes:

[0021] A cyclone separator, wherein the cyclone separator is disposed on the outside of the feed cylinder;

[0022] A feed pipe is provided on the outer circumferential wall of the cyclone separator and connected to the first discharge port;

[0023] The second discharge port is located on the outer circumferential wall of the cyclone separator and at the upper end of the feed pipe.

[0024] Preferably, it further includes a dust removal mechanism, which is connected to the gas-solid separation mechanism, and the dust removal mechanism includes:

[0025] A bag filter dust collector, wherein the bag filter dust collector is disposed outside the cyclone separator;

[0026] A feeding port is provided on the outer circumferential wall of the bag filter and connected to the second discharge port;

[0027] The discharge port is located on the outer circumferential wall of the bag filter and above the feed port.

[0028] Preferably, it further includes a gas-liquid separation mechanism, which is connected to the dust removal mechanism, and the gas-liquid separation mechanism includes:

[0029] A separation cylinder is disposed on the outside of the bag filter. A second feed inlet and a first exhaust outlet are respectively provided on the outer circumferential wall of the separation cylinder. The first exhaust outlet is located above the second feed inlet. A drain outlet is provided at the end of the separation cylinder. The first exhaust outlet is connected to the heat exchange tube through a pipe.

[0030] A gas-liquid conduit, one end of which is connected to the second feed inlet and the other end of which is connected to the discharge port;

[0031] A first top cover is disposed at the other end of the separator cylinder, and a second exhaust port is provided at the top edge of the first top cover.

[0032] Preferably, it further includes a gas-liquid separation power mechanism, which is connected to the gas-liquid separation mechanism, and the gas-liquid separation power mechanism includes:

[0033] The first speed reducer is disposed on the top of the first top cover;

[0034] A first motor is disposed at the end of the first reducer;

[0035] A drive rod is mounted on the output shaft of the first reducer and disposed within the inner cavity of the separator cylinder. Separation blades are provided on the outer circumferential wall of the drive rod, and the separation blades are disposed within the inner cavity of the separator cylinder.

[0036] Preferably, the inner cavity of the pretreatment cylinder is provided with a heat exchange coil, the heat exchange coil is connected to the heat exchange tube, and the end of the pretreatment cylinder is provided with a third discharge port, which is connected to the discharge pipe.

[0037] Preferably, the pretreatment mechanism further includes:

[0038] A second top cover is disposed at the other end of the pretreatment cylinder and is used to seal the pretreatment cylinder.

[0039] Preferably, it further includes a pretreatment power mechanism, which is connected to the pretreatment mechanism, and the pretreatment power mechanism includes:

[0040] The second reducer is disposed on the top of the second top cover;

[0041] The second motor is located at the end of the second reducer;

[0042] A stirring rod is provided on the output shaft of the second reducer and disposed in the inner cavity of the pretreatment cylinder. The stirring rod is provided with a second stirring blade, which is disposed in the inner cavity of the pretreatment cylinder.

[0043] Preferably, it further includes a material conveying power mechanism, which is connected to the pretreatment mechanism, and the material conveying power mechanism includes:

[0044] A third speed reducer is disposed at the end of the discharge pipe;

[0045] A third motor is disposed at the end of the third reducer;

[0046] A conveying shaft is provided on the output shaft of the third reducer and in the inner cavity of the discharge pipe. Conveying blades are provided on the outer circumferential wall of the conveying shaft. The conveying blades are provided in the inner cavity of the discharge pipe and are tangential to the inner cavity sidewall of the discharge pipe.

[0047] Compared with the prior art, the beneficial effects of the present invention are: The present invention:

[0048] (1) The material is pretreated by the pretreatment cylinder, and the pretreated material is transported to the inner cavity of the mixing and crushing mechanism through the discharge pipe for crushing and drying, which improves the working efficiency.

[0049] (2) The inner cavity of the drying chamber is heated by hot air. The drying chamber is formed by the rotation of the first stirring blade. The hot air generates strong shearing and blowing action on the material. As a result, the material is micronized by centrifugation, shearing, collision and friction. At the bottom of the drying chamber, the larger and wetter material is mechanically crushed by the action of the first stirring blade. The particles with lower moisture content and smaller particle size are carried up by the rotating airflow and further dried during the rising process. The particles with lower moisture content and smaller particle size come into contact with the screen through the guide tube. The material that meets the particle size requirements passes through the screen and enters the inner cavity of the end cover and is discharged through the first discharge port. The material that does not meet the particle size requirements is blocked by the screen and sticks together with other materials that do not meet the requirements to form large particles. Under the action of gravity, the particles fall back into the inner cavity of the drying chamber to continue to be crushed and dried until the particle size requirements are met.

[0050] (3) The drive rod is driven to rotate by the output shaft on the first reducer. The separation blade is welded to the outer circumference of the drive rod. The drive rod drives the separation blade to rotate in the inner cavity of the separation cylinder. The hot and humid air enters the inner cavity of the separation cylinder and comes into contact with the separation blade. The separation blade rotates and uses centrifugal force to remove the moisture in the hot and humid air, thereby achieving the purpose of gas-liquid separation.

[0051] (4) The high-temperature gas after gas-liquid separation is extracted from the inner cavity of the separator by an air pump. The air pump is connected to the air inlet of the heat exchange tube through a pipe. The inner diameter of the end of the pipe connected to the air pump is larger, and the inner diameter of the end connected to the heat exchange tube is smaller. This gradually compresses the high-temperature gas to further increase its temperature. The compressed high-temperature gas enters the inner cavity of the heat exchange tube. The inner diameter of the heat exchange tube is the same as the inner diameter of the smaller end of the pipe. The heat exchange tube maintains the compression of the gas. The high-temperature gas entering the inner cavity of the heat exchange tube exchanges heat with the humid and hot air at the top of the inner cavity of the guide cylinder, thereby further increasing the temperature of the high-temperature gas and utilizing the waste heat of the dryer.

[0052] (5) The heated air enters the inner cavity of the heat exchange coil through the heat exchange tube and heats the inner cavity of the pretreatment cylinder through the heat exchange coil. The paste-like material is put into the inner cavity of the pretreatment cylinder for preheating treatment. The stirring rod is driven to rotate by the second reducer, and the second stirring blade is driven to rotate by the stirring rod. The paste-like material is pre-stirred by the rotation of the second stirring blade. Attached Figure Description

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

[0054] Figure 2 This is a schematic diagram of the stirring and crushing mechanism of the present invention;

[0055] Figure 3 This is a schematic diagram of the gas-solid separation mechanism of the present invention;

[0056] Figure 4 This is a schematic diagram of the dust removal mechanism of the present invention;

[0057] Figure 5 This is a schematic diagram of the gas-liquid separation mechanism of the present invention;

[0058] Figure 6 This is a schematic diagram of the gas-liquid separation power mechanism of the present invention;

[0059] Figure 7 This is a schematic diagram of the pretreatment mechanism of the present invention;

[0060] Figure 8 This is a schematic diagram of the pretreatment power mechanism structure of the present invention;

[0061] Figure 9 This is a schematic diagram of the material conveying power mechanism of the present invention.

[0062] In the diagram: 100 Mixing and crushing mechanism, 110 Drying chamber, 110a First feed inlet, 120 Air box, 130 Heating mechanism, 140 Mixing mechanism, 140a Conical drive wheel, 140b First connecting shaft, 140c Power wheel, 140d Second connecting shaft, 140e First mixing blade, 150 Guide cylinder, 150a Inner sleeve, 150b Heat exchange tube, 160 End cover, 160a Screen, 160b First discharge port, 200 Gas-solid separation mechanism, 210 Cyclone separator, 220 Feed pipe, 230 Second discharge port, 300 Dust removal mechanism, 310 Bag dust collector, 320 Feed interface, 330 Discharge interface, 400 Gas-liquid separation mechanism, 410 Separation cylinder, 410 a. Second feed inlet, 410b. Drain outlet, 410c. First exhaust outlet, 420. Gas-liquid conduit, 430. First top cover, 430a. Second exhaust outlet, 500. Gas-liquid separation power mechanism, 510. First reducer, 520. First motor, 530. Drive rod, 530a. Separation blade, 600. Pretreatment mechanism, 610. Pretreatment cylinder, 610a. Heat exchange coil, 610b. Third discharge outlet, 620. Second top cover, 630. Discharge pipe, 700. Pretreatment power mechanism, 710. Second reducer, 720. Second motor, 730. Stirring rod, 730a. Second stirring blade, 800. Conveying power mechanism, 810. Third reducer, 820. Third motor, 830. Conveying shaft, 830a. Conveying blade. Detailed Implementation

[0063] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] This invention provides a flash dryer for thiodipropionic acid. The material is pretreated in a pretreatment cylinder, and then transported through a discharge pipe to the inner cavity of a mixing and crushing mechanism for further pulverization and drying. This improves work efficiency. Please refer to [link / reference]. Figure 1 It includes: a mixing and crushing mechanism 100, a gas-solid separation mechanism 200, a dust removal mechanism 300, a gas-liquid separation mechanism 400, a gas-liquid separation power mechanism 500, a pretreatment mechanism 600, a pretreatment power mechanism 700, and a material conveying power mechanism 800.

[0065] Example 1

[0066] Please see Figure 1 and Figure 7The discharge pipe 630 is detachably installed on the feed end of the mixing and crushing mechanism 100, and the pretreatment cylinder 610 is detachably installed on the feed end of the discharge pipe 630. The material is mixed and pretreated at high temperature through the pretreatment cylinder 610. The pretreated material is then fed into the inner cavity of the discharge pipe 630 and fed into the inner cavity of the mixing and crushing mechanism 100 for crushing and drying. This saves the material processing time of the mixing and crushing mechanism 100 and effectively improves work efficiency.

[0067] Example 2

[0068] Please see Figure 1-4 The drying chamber 110 is a cylindrical structure with openings at both the top and bottom. The first feed inlet 110a is located on the outer circumferential wall of the drying chamber 110. The material enters the inner cavity of the drying chamber 110 through the first feed inlet 110a for drying.

[0069] The bellows 120 is welded to the outer circumferential wall of the drying chamber 110. The bellows 120 is located at the lower end of the first feed inlet 110a. The bellows 120 is not connected to the inner cavity of the drying chamber 110.

[0070] The heating mechanism 130 is detachably mounted on the air inlet of the air box 120 by bolts. The heating mechanism 130 includes, but is not limited to, coal heating mechanism, oil heating mechanism, electric heating mechanism and natural gas heating mechanism. A fan is installed on the end of the heating mechanism 130 away from the air box 120. The fan inputs air into the inner cavity of the heating mechanism 130 for heating. The heated air enters the inner cavity of the air box 120 and surrounds the outer circumferential wall of the drying chamber 110. The heated air heats the inner cavity of the drying chamber 110.

[0071] The conical drive wheel 140a is mounted at the bottom opening of the drying chamber 110 via a sealed bearing. The first connecting shaft 140b is integrally formed at the bottom of the conical drive wheel 140a and is located on the outer side of the bottom of the drying chamber 110. The power wheel 140c is mounted on the outer circumferential wall of the first connecting shaft 140b via a spline or flat key. The power wheel 140c is connected to a rotary power mechanism, which consists of a motor, a drive wheel, and a belt assembly. The drive wheel is mounted on the output shaft of the motor, and the belt is sleeved on the power wheel 140c and the drive wheel. The motor drives the drive wheel to rotate, and the drive wheel drives the power wheel 140c to rotate via the belt. The power wheel 140c drives the conical drive wheel 140a to rotate at the bottom of the inner cavity of the drying chamber 110 via the first connecting shaft 140b.

[0072] The second connecting shaft 140d is coaxially integrally formed on the top of the conical drive wheel 140a and is set in the inner cavity of the drying chamber 110. The first stirring blade 140e is connected and installed on the outer circumferential wall of the second connecting shaft 140d by a spline or a flat key. The second connecting shaft 140d rotates in the inner cavity of the drying chamber 110 under the drive of the conical drive wheel 140a, and drives the first stirring blade 140e to rotate through the second connecting shaft 140d.

[0073] The material enters the inner cavity of the drying chamber 110 through the first feed inlet 110a. The material is heated by hot air and heated by the first stirring blade 140e. The paste-like material is heated, crushed and dried to produce granular material.

[0074] The guide cylinder 150 is installed at the top opening of the drying chamber 110 via a flange, and the guide cylinder 150 communicates with the inner cavity of the drying chamber 110. The end cap 160 is installed on the guide cylinder 150 at the end away from the drying chamber 110 via a flange, and the inner cavity of the end cap 160 communicates with the inner cavity of the guide cylinder 150. The screen 160a is detachably installed at the bottom of the inner cavity of the end cap 160 near the guide cylinder 150 via bolts. The first discharge port 160b is integrally formed on the outer circumferential wall of the end cap 160, and the first discharge port 160b communicates with the inner cavity of the end cap 160.

[0075] The inner cavity of the drying chamber 110 is heated by hot air. Under the rotation of the first stirring blade 140e, hot air is generated in the drying chamber 110. The hot air generates strong shearing and blowing action on the material. As a result, the material is micronized by centrifugation, shearing, collision and friction. At the bottom of the inner cavity of the drying chamber 110, the larger and wetter material is mechanically crushed by the action of the first stirring blade 140e. The particles with lower moisture content and smaller particle size are carried upward by the rotating airflow and further dried during the upward process. The particles with lower moisture content and smaller particle size come into contact with the screen 160a through the guide cylinder 150. The material that meets the particle size requirements passes through the screen 160a and enters the inner cavity of the end cover 160 and is discharged through the first discharge port 160b. The material that does not meet the particle size requirements is blocked by the screen 160a and agglomerates with other materials that do not meet the requirements to form large particles. Under the action of gravity, these particles fall back into the inner cavity of the drying chamber 110 to continue to be crushed and dried until the particle size requirements are met.

[0076] The inner sleeve 150a is detachably installed on the top of the inner cavity of the guide cylinder 150 by bolts. A gap is reserved between the inner sleeve 150a and the guide cylinder 150. The heat exchange tube 150b is spirally coiled in the gap reserved between the inner sleeve 150a and the guide cylinder 150. The two ends of the heat exchange tube 150b pass through the outer circumferential wall of the guide cylinder 150 respectively. Heat exchange is carried out between the heat exchange tube 150b and the hot air in the inner cavity of the guide cylinder 150.

[0077] The feed pipe 220 is integrally formed tangentially on the outer circumferential wall of the cyclone separator 210. The feed pipe 220 is connected to the first discharge port 160b through a flange. The pulverized and dried granular material enters the inner cavity of the feed pipe 220 through the first discharge port 160b and enters the inner cavity of the cyclone separator 210 through the feed pipe 220 for gas-solid separation. The pulverized and dried granular material settles at the bottom of the inner cavity of the cyclone separator 210, and the hot and humid air separated from the granular material rises to the top of the inner cavity of the cyclone separator 210.

[0078] The second discharge port 230 is integrally formed on the outer circumferential wall of the cyclone separator 210. The second discharge port 230 is located at the upper end of the discharge end of the feed pipe 220. Hot and humid air is discharged through the second discharge port 230, and at the same time, some fine powder particles are also discharged from the second discharge port 230 under the action of the hot and humid air.

[0079] The feed inlet 320 is integrally formed tangentially on the outer circumferential wall of the bag filter 310. The feed inlet 320 is connected to the second discharge port 230 through a flange. Hot and humid air and fine powder particles enter the inner cavity of the feed inlet 320 through the second discharge port 230 and then enter the inner cavity of the bag filter 310. The bag filter 310 filters the hot and humid air, and the fine powder particles remain in the inner cavity of the bag filter 310.

[0080] The discharge port 330 is integrally formed on the outer circumferential wall of the bag filter 310. The discharge port 330 is located above the feed port 320. The hot and humid air that has filtered the fine powder particles is discharged through the discharge port 330.

[0081] Example 3

[0082] Please see Figure 1-2 and Figure 4-6 The second feed inlet 410a is integrally formed on the bottom of the outer circumferential wall of the separator 410. One end of the gas-liquid conduit 420 is connected to the second feed inlet 410a and installed away from the separator 410 through a flange. The other end of the gas-liquid conduit 420 is connected to the discharge port 330 and installed away from the bag filter 310 through a flange. The hot and humid air that filters out the fine powder particles enters the inner cavity of the gas-liquid conduit 420 through the discharge port 330 and enters the inner cavity of the separator 410 through the gas-liquid conduit 420 and the second feed inlet 410a.

[0083] The first top cover 430 is detachably installed at the top opening of the separator 410 by bolts, and the first reducer 510 is detachably installed at the top center of the first top cover 430 by bolts. The output shaft of the first reducer 510 passes through the first top cover 430 and is inserted into the inner cavity of the separator 410.

[0084] The first motor 520 is detachably mounted on the first reducer 510 at the end away from the first top cover 430 by bolts, and drives the output shaft on the first reducer 510 to rotate.

[0085] The drive rod 530 is installed on the output shaft of the first reducer 510 via a spline or key. The drive rod 530 is located in the inner cavity of the separation cylinder 410. The top end of the drive rod 530 is connected to the first top cover 430 via a bearing. The drive rod 530 is driven to rotate by the output shaft on the first reducer 510. The separation blade 530a is welded to the outer circumferential wall of the drive rod 530. The drive rod 530 drives the separation blade 530a to rotate in the inner cavity of the separation cylinder 410. The hot and humid air enters the inner cavity of the separation cylinder 410 and comes into contact with the separation blade 530a. The separation blade 530a rotates and uses centrifugal force to remove the moisture in the hot and humid air, thereby achieving the purpose of gas-liquid separation.

[0086] The drain port 410b is coaxially and integrally formed at the bottom of the separation cylinder 410. A water pump is installed on the end of the drain port 410b away from the separation cylinder 410 through a pipe. The liquid after gas-liquid separation settles at the bottom of the separation cylinder 410. The water pump starts and stops according to the set time to discharge the liquid settled at the bottom of the inner cavity of the separation cylinder 410.

[0087] The first exhaust port 410c is integrally formed on the top of the outer circumferential wall of the separation cylinder 410. An air pump is installed at the end of the first exhaust port 410c away from the separation cylinder 410. The air pump draws the high-temperature gas after gas-liquid separation from the inner cavity of the separation cylinder 410. The air pump is connected to the air inlet end of the heat exchange tube 150b through a pipe. The inner diameter of the end of the pipe connected to the air pump is larger, and the inner diameter of the end connected to the heat exchange tube 150b is smaller. This gradually compresses the high-temperature gas to further increase its temperature. The compressed high-temperature gas enters the inner cavity of the heat exchange tube 150b. The inner diameter of the heat exchange tube 150b is the same as the inner diameter of the smaller end of the pipe. The heat exchange tube 150b maintains the compression of the gas. The high-temperature gas entering the inner cavity of the heat exchange tube 150b exchanges heat with the humid and hot air at the top of the inner cavity of the guide cylinder 150, thereby further increasing the temperature of the high-temperature gas and utilizing the waste heat of the dryer.

[0088] The second exhaust port 430a is integrally formed at the top edge of the first top cover 430. The second exhaust port 430a communicates with the inner cavity of the separator 410. A pressure relief valve is installed on the end of the second exhaust port 430a away from the first top cover 430. When the air pressure in the inner cavity of the separator 410 is high and cannot be reduced through the first exhaust port 410c, the excess gas is discharged through the second exhaust port 430a to ensure safety.

[0089] Example 4

[0090] Please see Figure 1-2 and Figure 7-9 The discharge pipe 630 is connected to the first feed port 110a via a flange, and the inner cavity of the discharge pipe 630 is connected to the inner cavity of the drying chamber 110 via the first feed port 110a.

[0091] The third discharge port 610b is integrally formed at the bottom of the pretreatment cylinder 610. The third discharge port 610b is installed on the outer circumferential wall of the discharge pipe 630 through a flange. The inner cavity of the pretreatment cylinder 610 is connected to the inner cavity of the discharge pipe 630. The pretreatment cylinder 610 is a double-layer cylindrical structure with a reserved interlayer.

[0092] The heat exchange coil 610a is spirally wound inside the jacket. Both ends of the heat exchange coil 610a penetrate the outer circumferential wall of the pretreatment cylinder 610. The air inlet of the heat exchange coil 610a is connected to the exhaust end of the heat exchange tube 150b. The heated air enters the inner cavity of the heat exchange coil 610a through the heat exchange tube 150b and heats the inner cavity of the pretreatment cylinder 610 through the heat exchange coil 610a. The paste-like material is put into the inner cavity of the pretreatment cylinder 610 for preheating treatment.

[0093] The second top cover 620 is detachably installed at the top opening of the pretreatment cylinder 610 by bolts, and a sealing treatment is performed between the second top cover 620 and the pretreatment cylinder 610;

[0094] The second reducer 710 is detachably mounted on the top center of the second top cover 620 by bolts. The output shaft of the second reducer 710 passes through the second top cover 620 and is inserted into the inner cavity of the pretreatment cylinder 610.

[0095] The second motor 720 is detachably mounted on the second reducer 710 at the end away from the second top cover 620 by bolts, and drives the output shaft on the second reducer 710 to rotate.

[0096] The stirring rod 730 is connected to the output shaft of the second reducer 710 via a spline or flat key. The stirring rod 730 is located in the inner cavity of the pretreatment cylinder 610. The top end of the stirring rod 730 is connected to the second top cover 620 via a bearing. The second stirring blade 730a is welded to the outer circumferential wall of the stirring rod 730. The stirring rod 730 is driven to rotate by the second reducer 710, and the second stirring blade 730a is driven to rotate by the stirring rod 730. The rotation of the second stirring blade 730a pre-stirs the paste-like material. The pre-stirred material enters the inner cavity of the discharge pipe 630 through the third discharge port 610b.

[0097] The third reducer 810 is detachably mounted on the discharge pipe 630 at the end away from the first feed port 110a by bolts. The output shaft of the third reducer 810 passes through the discharge pipe 630 and is inserted into the inner cavity of the discharge pipe 630.

[0098] The third motor 820 is detachably mounted on the third reducer 810 at the end away from the discharge pipe 630 by bolts, and drives the output shaft on the third reducer 810 to rotate.

[0099] The conveying shaft 830 is mounted on the output shaft of the third reducer 810 via a spline or a flat key. The conveying shaft 830 is located in the inner cavity of the discharge pipe 630. The third reducer 810 drives the conveying shaft 830 to rotate. The conveying blades 830a are welded to the outer circumferential wall of the conveying shaft 830. The conveying blades 830a are tangential to the inner circumferential wall of the discharge pipe 630. The conveying shaft 830 drives the conveying blades 830a to rotate. The rotation of the conveying blades 830a drives the pre-treated paste-like material into the inner cavity of the discharge pipe 630 to enter the inner cavity of the drying chamber 110 for drying.

[0100] Although the invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, features in the embodiments disclosed herein can be combined in any way, provided there is no structural conflict. The lack of an exhaustive description of these combinations in this specification is merely for brevity and resource conservation. Therefore, the invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A flash dryer for thiodipropionic acid, characterized in that: include: Mixing and crushing mechanism (100); The pretreatment mechanism (600) includes a pretreatment cylinder (610) and a discharge pipe (630). The discharge pipe (630) is located at the bottom of the pretreatment cylinder (610) and is used to transport the material pretreated by the pretreatment cylinder (610) to the inner cavity of the mixing and crushing mechanism (100) connected thereto for crushing and drying. It also includes a gas-liquid separation mechanism (400), which is connected to the dust removal mechanism (300), and the gas-liquid separation mechanism (400) includes: A separation cylinder (410) is disposed on the outside of the bag filter (310) of the dust removal mechanism (300). A second feed inlet (410a) and a first exhaust outlet (410c) are respectively provided on the outer circumferential wall of the separation cylinder (410). The first exhaust outlet (410c) is located at the upper end of the second feed inlet (410a). A drain outlet (410b) is provided at the end of the separation cylinder (410). The first exhaust outlet (410c) is connected to the heat exchange tube (150b) through a pipe. A gas-liquid conduit (420) is provided, with one end connected to the second feed inlet (410a) and the other end connected to the discharge port (330). A first top cover (430) is disposed at the other end of the separator (410), and a second exhaust port (430a) is provided at the top edge of the first top cover (430).

2. The flash dryer for thiodipropionic acid according to claim 1, characterized in that: The stirring and crushing mechanism (100) includes: A drying chamber (110) is provided with a first feed inlet (110a) on its outer circumferential wall. A bellows (120) is disposed on the outer circumferential wall of the drying chamber (110), and the bellows (120) is disposed at the lower end of the first feed inlet (110a); A heating mechanism (130) is disposed at the end of the air box (120); A stirring mechanism (140) is provided at the bottom of the drying chamber (110). The stirring mechanism (140) includes a conical drive wheel (140a), a first connecting shaft (140b), a power wheel (140c), a second connecting shaft (140d), and a first stirring blade (140e). The conical drive wheel (140a) is mounted in the inner cavity of the drying chamber (110) via a sealed bearing; The first connecting shaft (140b) is disposed at the bottom of the conical drive wheel (140a) and on the outside of the drying chamber (110); The drive wheel (140c) is disposed on the outer circumferential wall of the first connecting shaft (140b); The second connecting shaft (140d) is disposed at the end of the conical drive wheel (140a) and in the inner cavity of the drying chamber (110); The first stirring blade (140e) is disposed on the outer circumferential wall of the second connecting shaft (140d); A feed tube (150) is provided at the end of the drying chamber (110) and communicates with the inner cavity of the drying chamber (110). An inner sleeve (150a) is provided at the top of the inner cavity of the feed tube (150), and a heat exchange tube (150b) is provided between the inner sleeve (150a) and the feed tube (150). End cap (160), the end cap (160) is disposed at the end of the guide cylinder (150), the inner cavity of the end cap (160) is provided with a screen (160a), and the outer circumferential wall of the end cap (160) is provided with a first discharge port (160b).

3. The flash dryer for thiodipropionic acid according to claim 2, characterized in that: It also includes a gas-solid separation mechanism (200), which is connected to the stirring and crushing mechanism (100), and the gas-solid separation mechanism (200) includes: Cyclone separator (210), the cyclone separator (210) is disposed on the outside of the feed cylinder (150); Feed pipe (220) is provided on the outer circumferential wall of the cyclone separator (210) and connected to the first discharge port (160b); The second discharge port (230) is located on the outer circumferential wall of the cyclone separator (210) and at the upper end of the feed pipe (220).

4. A flash dryer for thiodipropionic acid according to claim 3, characterized in that: It also includes a dust removal mechanism (300), which is connected to the gas-solid separation mechanism (200), and the dust removal mechanism (300) includes: A bag filter (310) is disposed outside the cyclone separator (210); The feed port (320) is located on the outer circumferential wall of the bag filter (310) and connected to the second discharge port (230); The discharge port (330) is located on the outer circumferential wall of the bag filter (310) and above the feed port (320).

5. A flash dryer for thiodipropionic acid according to claim 4, characterized in that: It also includes a gas-liquid separation power mechanism (500), which is connected to the gas-liquid separation mechanism (400), and the gas-liquid separation power mechanism (500) includes: The first reducer (510) is disposed on the top of the first top cover (430); The first motor (520) is disposed at the end of the first reducer (510); A drive rod (530) is mounted on the output shaft of the first reducer (510) and is located in the inner cavity of the separator (410). A separation blade (530a) is mounted on the outer circumferential wall of the drive rod (530) and is located in the inner cavity of the separator (410).

6. A flash dryer for thiodipropionic acid according to claim 5, characterized in that: The pretreatment cylinder (610) has a heat exchange coil (610a) inside its cavity. The heat exchange coil (610a) is connected to the heat exchange tube (150b). The end of the pretreatment cylinder (610) is provided with a third discharge port (610b), which is connected to the discharge pipe (630).

7. A flash dryer for thiodipropionic acid according to claim 6, characterized in that: The pretreatment unit (600) further includes: The second top cover (620) is disposed at the other end of the pretreatment cylinder (610) and is sealed between the pretreatment cylinder (610).

8. A flash dryer for thiodipropionic acid according to claim 7, characterized in that: It also includes a pretreatment power mechanism (700), which is connected to the pretreatment mechanism (600), and the pretreatment power mechanism (700) includes: The second reducer (710) is disposed on the top of the second top cover (620); The second motor (720) is located at the end of the second reducer (710); A stirring rod (730) is disposed on the output shaft of the second reducer (710) and disposed in the inner cavity of the pretreatment cylinder (610). The stirring rod (730) is provided with a second stirring blade (730a), which is disposed in the inner cavity of the pretreatment cylinder (610).

9. A flash dryer for thiodipropionic acid according to claim 8, characterized in that: It also includes a material conveying power mechanism (800), which is connected to the pretreatment mechanism (600), and the material conveying power mechanism (800) includes: A third reducer (810) is disposed at the end of the discharge pipe (630); A third motor (820) is disposed at the end of the third reducer (810); A conveying shaft (830) is provided on the output shaft of the third reducer (810) and in the inner cavity of the discharge pipe (630). A conveying blade (830a) is provided on the outer circumferential wall of the conveying shaft (830). The conveying blade (830a) is provided in the inner cavity of the discharge pipe (630) and is tangential to the inner cavity side wall of the discharge pipe (630).

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