Cooling device for production of methylthio acetaldoxime

Abstract

The utility model discloses a cooling device for methylthio acetaldehyde oxime production, and belongs to the technical field of methylthio acetaldehyde oxime production. Comprising a pedestal, an arc-shaped cooling sleeve, a cooling cylinder and a scraper metering module, an arc-shaped groove is formed in the top face of the pedestal, the arc-shaped cooling sleeve is embedded and fixed to the inner side of the arc-shaped groove, and a cold medium liquid inlet flange and a cold medium liquid return flange are arranged at the bottom and the top of the arc-shaped cooling sleeve respectively; the cold medium liquid inlet flange and the cold medium liquid return flange are connected to a circulating cooling system; the cooling cylinder is embedded and fixed to the inner side of the arc-shaped cooling sleeve, a feeding port is formed in the upper portion of the cooling cylinder, and a discharging port is formed in the opposite side of the cooling cylinder; the arc-shaped cooling sleeve is arranged below the feed port and the discharge port, and the feed port is connected to a feed hopper through an electric control valve; according to the cooling device for producing the methylthio-acetaldehyde oxime, the methylthio-acetaldehyde oxime is pre-cooled in an air cooling manner, and afterheat in the methylthio-acetaldehyde oxime can be eliminated through thinning contact type cooling.

Description

Technical Field

[0001] The utility model specifically relates to a cooling device for the production of methylthioacetaldoxime, belonging to the technical field of methylthioacetaldoxime production. Background Art

[0002] During the production of methylthioacetaldoxime, it is necessary to pass through a methylsulfuration reactor to generate a methylthioacetaldoxime mixture, and after evaporation and solid-liquid separation, wet methylthioacetaldoxime is obtained. Then, the methylthioacetaldoxime is dried and cooled to obtain a methylthioacetaldoxime product. Existing methylthioacetaldoxime cooling equipment, such as a cooling device for the production of methylthioacetaldoxime disclosed in Chinese Patent Publication No.: CN212320507U, includes a bottom plate. One side of the top of the bottom plate is provided with a cooling machine body. The cooling machine body includes a cooling tank. The top of the cooling tank is provided with a sealing cover. One side of the top of the sealing cover is provided with a motor. The lower end of the motor is fixedly connected to a stirring rod. One side of the stirring rod is welded with stirring blades. When using the cooling machine body to cool the raw materials of methylthioacetaldoxime, the raw materials of methylthioacetaldoxime are cooled more fully through the stirring mechanism, which is more convenient for the production of methylthioacetaldoxime and more convenient to use. However, due to the adhesion of the crystals of methylthioacetaldoxime, the residual heat inside the methylthioacetaldoxime cannot be eliminated only by stirring. Summary of the Utility Model

[0003] To solve the above problems, the utility model proposes a cooling device for the production of methylthioacetaldoxime, which pre-cools the methylthioacetaldoxime by means of air cooling and then eliminates the residual heat inside the methylthioacetaldoxime through thinning contact cooling.

[0004] The cooling device for the production of methylthioacetaldoxime of the utility model includes:

[0005] A pedestal, on the top surface of which an arc-shaped groove is provided,

[0006] An arc-shaped cooling sleeve, which is fixedly embedded in the inner side of the arc-shaped groove. A cold medium inlet flange and a cold medium return flange are respectively arranged at the bottom and the top of the arc-shaped cooling sleeve. The cold medium inlet flange and the cold medium return flange are connected to a circulating cooling system. The circulating cooling system pumps the cold medium into the arc-shaped cooling sleeve through the cold medium inlet flange. After heat exchange, it is discharged from the cold medium return flange and re-enters the circulating cooling system;

[0007] Cooling cylinder, the cooling cylinder is fitted and fixed inside the arc-shaped cooling sleeve. There is a feed inlet at the upper part of the cooling cylinder, and a discharge outlet is arranged on the opposite side of the cooling cylinder; the arc-shaped cooling sleeve is arranged below the feed inlet and the discharge outlet, and the feed inlet is connected to a feed hopper through an electric control valve; a discharge hopper is fixed at the discharge outlet; a rotating shaft is movably installed at the axis of the cooling cylinder, and multiple scraping plates are fixedly spaced on the rotating shaft. The gaps between the multiple scraping plates and the cooling cylinder are set from small to large; a driving motor is fitted and fixed at the lower part of the pedestal, and the driving motor is connected to the rotating shaft through a transmission member; the driving motor drives the rotating shaft to rotate uniformly, driving the rotating shaft to rotate, and the rotating shaft drives the scraping plates to rotate synchronously. During rotation, since the gaps between the multiple scraping plates and the cooling cylinder are set from small to large, therefore, the scraping plates can scrape the methyl mercaptoacetaldehyde oxime material pile entering the cooling cylinder from thick to thin in sequence and fit it to the inner surface of the cooling cylinder. Since the outer surface of the cooling cylinder is in press-fit contact with the arc-shaped cooling sleeve, the arc-shaped cooling sleeve can continuously cool the cooling cylinder; the methyl mercaptoacetaldehyde oxime thin layer that fits to the inner surface of the cooling cylinder can be efficiently cooled;

[0008] Scraping plate metering module, the scraping plate metering module is fitted and fixed at the top of the cooling cylinder; the scraping plate metering module is connected to a controller; the controller is connected to the electric control valve, and the scraping plate metering module and the electric control valve are linked. The scraping plate metering module measures the number of scraping plates rotating through in real time. For example, there are eight scraping plates fixedly spaced on the rotating shaft. When the scraping plate metering module monitors that eight scraping plates have passed through the scraping plate position, the electric control valve opens for one-time feeding, and then the metering quantity of the scraping plate metering module is cleared; the scraping plate metering module is a photoelectric inductor.

[0009] Further, the electric control valve is an electric control rotary valve or an electric control sluice valve.

[0010] Further, a rotary valve is arranged at the bottom of the feed hopper, the rotary valve is connected to the controller, the rotary valve and the electric control valve are communicated through a transition bin, a filter body is arranged on one side of the transition bin, and a gas guide pipe is fixed on the other side of the transition bin. During operation, the feed hopper receives methyl mercaptoacetaldehyde oxime, and then the rotary valve rotates for feeding, and the methyl mercaptoacetaldehyde oxime enters the transition bin. At this time, air is extracted or cold air is injected through the gas guide pipe, so as to cool the methyl mercaptoacetaldehyde oxime. The top and bottom of the rotary valve are isolated from each other, and the feed hopper and the transition bin can be isolated; the rotary valve and the electric control valve cooperate. When the rotary valve completes one-time feeding, every time the electric control valve opens and closes subsequently, the rotary valve delays feeding once.

[0011] Further, the gas guide pipe is connected to a cooling fan. The cooling fan works to draw external cold air to the gas guide pipe and send the cold air into the transition bin through the gas guide pipe for cooling, so as to discharge the heat of the methyl mercaptoacetaldehyde oxime through the filter body, realizing pre-cooling of the methyl mercaptoacetaldehyde oxime.

[0012] Further, the air duct is connected to a bag filter through an air extraction fan; the air extraction fan sucks air inside the transition bin through the air duct, thereby realizing air cooling of the methyl mercaptoacetaldoxime in the transition bin. While air cooling, the methyl mercaptoacetaldoxime fine powder can be sent into the bag filter, and the bag filter collects and recycles the fine powder.

[0013] Further, the feed hopper is connected to the output end of the dryer. After the methyl mercaptoacetaldoxime is processed and dried, the methyl mercaptoacetaldoxime with high-temperature waste heat is sent into the feed hopper for buffering.

[0014] Further, the circulating cooling system includes a circulating pump. The input end of the circulating pump is connected to the water cooling tank, the water cooling tank is fitted and installed inside the pedestal, the output end of the circulating pump is connected to the cold medium inlet flange, the cold medium return flange is connected to the water cooling tank through a pipeline, and a cooling temperature controller is installed inside the water cooling tank. The cooling temperature controller can control the temperature of the cold medium, so that the cold medium can conduct contact heat exchange with the methyl mercaptoacetaldoxime. The temperature of the cold medium needs to be higher than the water vapor liquefaction temperature. During operation, the circulating pump pumps the cold medium in the water cooling tank into the arc-shaped cooling sleeve through the cold medium inlet flange, so as to conduct contact heat exchange with the methyl mercaptoacetaldoxime in the cooling cylinder. After the heat exchange is completed, the cold medium is sent back to the water cooling tank for temperature control.

[0015] Compared with the prior art, the cooling device for producing methyl mercaptoacetaldoxime of the present utility model pre-cools the methyl mercaptoacetaldoxime by means of air cooling, and then continuously spreads the methyl mercaptoacetaldoxime into a thin layer. The spread thin layer contacts the pre-cooled cooling cylinder, so as to deeply cool the methyl mercaptoacetaldoxime, thereby being able to eliminate the waste heat inside the methyl mercaptoacetaldoxime. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1 of the present utility model.

[0017] Figure 2 It is a schematic diagram of the radial cross-sectional structure of the cooling cylinder of the present utility model.

[0018] Figure 3 It is a schematic diagram of the overall structure of Embodiment 2 of the present utility model.

[0019] Reference numerals: 1, pedestal; 2, arc-shaped cooling sleeve; 3, cold medium inlet flange; 4, cold medium return flange; 5, cooling cylinder; 6, feed inlet; 7, discharge outlet; 8, electric control valve; 9, feed hopper; 10, discharge hopper; 11, rotating shaft; 12, scraper; 13, drive motor; 14, scraper metering module; 15, rotary valve; 16, transition bin; 17, filter screen body; 18, air duct; 19, circulating pump; 20, water cooling tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Embodiment 1:

[0021] As Figure 1 and Figure 2 shown, the cooling device for the production of methylthioacetaldoxime includes:

[0022] A pedestal 1, on the top surface of which an arc-shaped groove is provided.

[0023] An arc-shaped cooling sleeve 2, which is fitted and fixed inside the arc-shaped groove. A cold medium inlet flange 3 and a cold medium return flange 4 are respectively arranged at the bottom and top of the arc-shaped cooling sleeve 2; the cold medium inlet flange 3 and the cold medium return flange 4 are connected to a circulating cooling system; the circulating cooling system pumps the cold medium into the arc-shaped cooling sleeve 2 through the cold medium inlet flange 3. After heat exchange, it is discharged from the cold medium return flange 4 and re-enters the circulating cooling system.

[0024] A cooling cylinder 5, which is fitted and fixed inside the arc-shaped cooling sleeve 2. A feed inlet 6 is arranged at the upper part of the cooling cylinder 5, and a discharge outlet 7 is arranged on the opposite side of the cooling cylinder 5; the arc-shaped cooling sleeve 2 is arranged below the feed inlet 6 and the discharge outlet 7. The feed inlet 6 is connected to a feed hopper 9 through an electric control valve 8; a discharge hopper 10 is fixed at the discharge outlet 7; a rotating shaft 11 is movably installed at the center of the cooling cylinder 5, and a plurality of scraping plates 12 are fixedly arranged at intervals on the rotating shaft 11. The gaps between the plurality of scraping plates 12 and the cooling cylinder 5 are set from small to large; a driving motor 13 is fitted and fixed at the lower part of the pedestal 1, and the driving motor 13 is connected to the rotating shaft 11 through a transmission member; the driving motor 13 drives the rotating shaft 11 to rotate at a constant speed. When the rotating shaft 11 is driven to rotate, the rotating shaft 11 drives the scraping plates 12 to rotate synchronously. During rotation, since the gaps between the plurality of scraping plates 12 and the cooling cylinder 5 are set from small to large, the scraping plates 12 can scrape the methylthioacetaldoxime material pile entering the cooling cylinder 5 from thick to thin in turn and fit it to the inner surface of the cooling cylinder 5. Since the outer surface of the cooling cylinder 5 is in press-fit contact with the arc-shaped cooling sleeve 2, the arc-shaped cooling sleeve 2 can continuously cool the cooling cylinder 5; the thin layer of methylthioacetaldoxime that fits to the inner surface of the cooling cylinder 5 can be efficiently cooled.

[0025] A scraping plate metering module 14, which is fitted and fixed on the top of the cooling cylinder 5; the scraping plate metering module 14 is connected to a controller; the controller is connected to the electric control valve 8, and the scraping plate metering module 14 and the electric control valve 8 are linked. The scraping plate metering module 14 measures the number of scraping plates 12 passing by in real time. For example, eight scraping plates 12 are fixedly arranged at intervals on the rotating shaft 11. When the scraping plate metering module 14 monitors that the number of scraping plates 12 passing by is eight, the electric control valve 8 is opened to discharge materials once, and then the metering quantity of the scraping plate metering module 14 is cleared; the scraping plate metering module 14 is a photoelectric inductor.

[0026] The electric control valve 8 is an electric control rotary valve or an electric control slide valve.

[0027] Example 2:

[0028] As Figure 3 shown, the cooling device for the production of methylthioacetaldoxime, a rotary valve 15 is provided at the bottom of the feed hopper 9, the rotary valve 15 is connected to a controller, the rotary valve 15 and the electric control valve 8 are communicated through a transition bin 16, a filter body 17 is arranged on one side of the transition bin 16, and a gas guide pipe 18 is fixed on the other side of the transition bin 16. During operation, the feed hopper 9 receives methylthioacetaldoxime, and then, the rotary valve 15 rotates for discharging, and the methylthioacetaldoxime enters the transition bin 16. At this time, air is pumped or cold air is injected through the gas guide pipe 18, so as to cool the methylthioacetaldoxime. The top and bottom of the rotary valve 15 are isolated from each other, and the feed hopper 9 and the transition bin 16 can be isolated; the rotary valve 15 and the electric control valve 8 cooperate. When the rotary valve 15 completes one discharging, subsequently, every time the electric control valve 8 opens and closes once, the rotary valve 15 delays discharging once.

[0029] The gas guide pipe 18 is connected to a cooling fan. The cooling fan operates to draw external cold air to the gas guide pipe 18, and the cold air is sent into the transition bin 16 through the gas guide pipe 18 for cooling, so that the heat of the methylthioacetaldoxime is discharged outside through the filter body 17, realizing pre-cooling of the methylthioacetaldoxime by air.

[0030] The gas guide pipe 18 is connected to a bag filter through an air extraction fan; the air extraction fan extracts air inside the transition bin 16 through the gas guide pipe 18, so as to realize air cooling of the methylthioacetaldoxime in the transition bin 16. Meanwhile, during air cooling, the fine powder of the methylthioacetaldoxime can be sent into the bag filter, and the bag filter collects and recycles the fine powder.

[0031] The feed hopper 9 is connected to the output end of a dryer. After the methylthioacetaldoxime is processed and dried, the methylthioacetaldoxime with high-temperature waste heat is sent into the feed hopper 9 for buffering.

[0032] The circulating cooling system includes a circulating pump 19. The input end of the circulating pump 19 is connected to a water cooling tank 20, the water cooling tank 20 is embedded and installed inside the pedestal 1, the output end of the circulating pump 19 is connected to a cold medium inlet flange 3, the cold medium return flange 4 is connected to the water cooling tank 20 through a pipeline, and a cooling temperature controller is installed inside the water cooling tank 20. The cooling temperature controller can control the temperature of the cold medium, so that the cold medium can conduct contact heat exchange with the methylthioacetaldoxime. The temperature of the cold medium needs to be higher than the water vapor liquefaction temperature. During operation, the circulating pump 19 pumps the cold medium in the water cooling tank 20 into the arc-shaped cooling sleeve 2 through the cold medium inlet flange 3, so as to conduct contact heat exchange with the methylthioacetaldoxime in the cooling cylinder 5. After the heat exchange is completed, the cold medium is sent back to the water cooling tank 20 for temperature control.

[0033] The above embodiments are only the preferred embodiments of the present utility model. Therefore, all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model application are included in the scope of the present utility model application.

Claims

1. A cooling device for the production of methylthioacetaldoxime, characterized in that: Including: A pedestal, on the top surface of which an arc-shaped groove is provided. An arc-shaped cooling sleeve, which is fitted and fixed inside the arc-shaped groove. A cold medium inlet flange and a cold medium return flange are respectively arranged at the bottom and top of the arc-shaped cooling sleeve; the cold medium inlet flange and the cold medium return flange are connected to a circulating cooling system. A cooling cylinder, which is fitted and fixed inside the arc-shaped cooling sleeve. A feed inlet is arranged at the upper part of the cooling cylinder, and a discharge outlet is arranged on the opposite side of the cooling cylinder; the arc-shaped cooling sleeve is arranged below the feed inlet and the discharge outlet. The feed inlet is connected to a feed hopper through an electric control valve; a discharge hopper is fixed at the discharge outlet. A rotating shaft is movably installed at the axis of the cooling cylinder, and a plurality of scraping plates are fixedly arranged at intervals on the rotating shaft. The gaps between the plurality of scraping plates and the cooling cylinder are arranged from small to large; a driving motor is fitted and fixed at the lower part of the pedestal, and the driving motor is connected to the rotating shaft through a transmission member. A scraping plate metering module, which is fitted and fixed at the top of the cooling cylinder; the scraping plate metering module is connected to a controller; the controller is connected to the electric control valve.

2. The cooling device for the production of methylthioacetaldoxime according to claim 1, characterized in that: The electric control valve is an electric control rotary valve or an electric control slide valve.

3. The cooling device for the production of methylthioacetaldoxime according to claim 1, wherein: A rotary valve is arranged at the bottom of the feed hopper. The rotary valve is connected to the controller. The rotary valve and the electric control valve are communicated through a transition bin. A filter body is arranged on one side of the transition bin, and a gas guide pipe is fixed on the other side of the transition bin.

4. The cooling device for the production of methylthioacetaldoxime according to claim 3, wherein: The gas guide pipe is connected to a cooling fan.

5. The cooling device for the production of methylthioacetaldoxime according to claim 3, characterized in that: The gas guide pipe is connected to a bag filter through an air extraction fan.

6. The cooling device for the production of methylthioacetaldoxime according to claim 1, wherein: The feed hopper is connected to the output end of a dryer.

7. The cooling device for the production of methylthioacetaldoxime according to claim 1, characterized in that: The circulating cooling system includes a circulating pump. The input end of the circulating pump is connected to a water cooling tank, which is fitted and installed inside the pedestal. The output end of the circulating pump is connected to the cold medium inlet flange. The cold medium return flange is connected to the water cooling tank through a pipeline. A cooling temperature controller is installed inside the water cooling tank.

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