CN204768715U - Chemical industry distillation plant - Google Patents

Abstract

The utility model discloses a chemical distillation device, which comprises a reaction kettle. The reaction kettle is provided with a kettle cover with equipment flanges and a kettle body. The kettle body is provided with a high-speed stirring shaft and a low-speed stirring shaft. The high-speed stirring shaft is arranged from top to bottom. Stirring blades are provided, and a scraper mechanism is connected to the lower end of the low-speed stirring shaft. The scraper mechanism includes a kettle wall scraper and a bottom scraper. The inside of the kettle wall scraper is provided with the same number of stirring teeth as the stirring blades. A vertical condensing pipe is also installed, and the outside of the vertical condensing pipe is provided with a sleeve. The upper end of the vertical condensing pipe is connected to the horizontal condensing pipe through a pipeline. The position of the horizontal condensing pipe close to the pipeline is provided with a temperature sensor. Screen. The utility model can effectively clean the inner wall of the kettle body while stirring, and prevent the raw materials from sticking to the inner wall of the kettle body; increase the amount of low-temperature solvent by controlling the diaphragm pump, and cool the high-temperature solvent vapor , good cooling effect.

Description

A chemical distillation device

technical field

The utility model relates to the field of chemical equipment, which is a chemical distillation device.

Background technique

The polyalcohol in the reactor reaction and the water vapor generated by the polybasic esterification reaction and the unreacted polyol in the reactor will form a high-temperature solvent vapor. After the initial cooling, the high-temperature solvent vapor enters the distiller to distill to form a low-temperature solvent, and then enters the water separation The water vapor is separated from the water separator to separate condensed water and polyols, and the condensed water and polyols are separated and reused separately. However, the primary cooling effect of the existing high-temperature solvent vapor is not good, and the temperature is still too high when it enters the distiller, so it is difficult to effectively control the temperature; Insufficient contact area and uneven stirring often lead to incomplete reaction. In addition, if the raw materials sticking to the side wall of the kettle body are not scraped off in time, high-temperature carbon formation will easily occur, which will further affect the reaction efficiency and reduce the utilization rate of raw materials.

Utility model content

The purpose of the utility model is to provide a chemical distillation device with good cooling effect to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A chemical distillation device, including a reaction kettle, the reaction kettle is provided with a kettle cover with an equipment flange and a kettle body, a jacket is arranged on the outside of the kettle body, a heat transfer oil outlet is arranged on the upper part of the jacket, and a heat transfer oil is arranged at the lower end of the jacket The inlet, the lid of the kettle is equipped with a feed port and a discharge port, and the kettle body is equipped with a high-speed stirring shaft and a low-speed stirring shaft. The high-speed stirring shaft is equipped with stirring blades from top to bottom, and the lower end of the low-speed stirring shaft is connected to a scraper mechanism , the scraper mechanism includes a kettle wall scraper and a bottom scraper, the inside of the kettle wall scraper is provided with the same number of stirring teeth as the stirring blades, the stirring blades and the stirring teeth are arranged in a staggered manner, and the stirring blades extend into the corresponding In the gap between the adjacent two layers of stirring teeth, the surfaces of the stirring teeth and the stirring blades are also equipped with glass-lined, and the kettle cover is also equipped with a high-speed motor and a low-speed motor. The other ends of the high-speed stirring shaft and the low-speed stirring shaft extend out of the kettle body respectively The high-speed motor is connected with the low-speed motor; the reaction kettle is also provided with a vertical condensing pipe, and the outside of the vertical condensing pipe is provided with a casing, the casing is connected to the cooling water device, and the upper end of the vertical condensing pipe is connected to the horizontal condensing pipe through a pipeline. The end of the horizontal condensing pipe away from the vertical condensing pipe is connected to the water separator, and the water separator is connected to the diaphragm pump. The diaphragm pump is connected to the nozzle through the pipeline, and the nozzle is connected to the pipeline. temperature display.

As a further solution of the utility model: the kettle body is also provided with an observation hole.

As a further solution of the utility model: the cooling water device includes a cooling water inlet pipe and a cooling water outlet pipe connected with the casing, and the cooling water outlet pipe is arranged above the cooling water inlet pipe.

As a further solution of the utility model: the diaphragm pump is a pneumatic diaphragm pump, and the pneumatic diaphragm pump is provided with an electromagnetic pneumatic valve.

As a further solution of the utility model: a temperature controller is provided between the temperature display screen and the electromagnetic pneumatic valve.

Compared with the prior art, the beneficial effect of the utility model is: in the utility model, the contact area between the reactor and the reaction material is ensured through the setting of the stirring blades from top to bottom, and the staggered setting of the stirring blades and the stirring teeth makes the stirring It is more uniform and thorough. There is also a scraper mechanism at the lower end of the low-speed stirring shaft. While stirring, it can effectively clean the inner wall of the kettle body, prevent the raw materials from sticking to the inner wall of the kettle body, and improve the utilization of raw materials. rate; and part of the low-temperature solvent in the water separator is passed into the pipeline to cool the high-temperature solvent vapor. The operator controls the operation of the temperature display screen or the temperature controller, and increases the amount of low-temperature solvent added by controlling the diaphragm pump. The high-temperature solvent vapor is used for cooling, and the cooling effect is good.

Description of drawings

Fig. 1 is the structural representation of chemical industry distillation unit;

In the figure: 1-high-speed motor, 2-high-speed stirring shaft, 3-stirring teeth, 4-stirring blade, 5-scraper mechanism, 6-low-speed motor, 7-kettle cover, 8-kettle body, 9-heat transfer oil outlet , 10-jacket, 11-low-speed stirring shaft, 12-heat transfer oil inlet, 13-vertical condenser, 14-pipeline, 15-horizontal condenser, 16-water separator, 17-opening, 18-pneumatic diaphragm Pump, 19-first valve, 20-electromagnetic pneumatic valve, 21-casing, 22-second valve, 23-nozzle, 24-thermal resistance, 25-temperature display, 26-temperature controller, 27-cooling water Water inlet pipe, 28-cooling water outlet pipe, 29-pipeline.

Detailed ways

The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.

Please refer to Figure 1, a chemical distillation device, including a reaction kettle, the reaction kettle is provided with a kettle cover 7 and a kettle body 8 with equipment flanges, the kettle cover 7 and the kettle body 8 are connected by equipment flange bolts, and the outside of the kettle body 8 A jacket 10 is provided, the upper part of the jacket 10 is provided with a heat transfer oil outlet 9, the lower end of the jacket 10 is provided with a heat transfer oil inlet 12, and the kettle lid 7 is also provided with a feed port and a discharge port. The kettle body 8 is provided with a high-speed stirring shaft 2 and a low-speed stirring shaft 11. The high-speed stirring shaft 2 is provided with a number of stirring blades 4 from top to bottom to prevent the contact area between the stirring blades and the reaction material from being insufficient. The high-speed motor 1 connected to the high-speed stirring shaft 2 and the low-speed motor 6 connected to the low-speed stirring shaft 11, the high-speed motor 1 and the low-speed motor 6 are fixed on the kettle cover 7 by the frame at the lower end respectively, and the lower end of the low-speed stirring shaft 11 Connect a scraper mechanism 5, said scraper mechanism 5 comprises kettle wall scraper 52 and bottom scraper 51, is provided with the same number of stirring teeth 3 as stirring blade 4 in the inner side of kettle wall scraper 52, said stirring The blades 4 and the stirring teeth 3 are alternately arranged, and the stirring blades 4 extend into the gap between the two adjacent layers of stirring teeth 3, so that the cutting movement between the stirring blades 4 and the stirring teeth 3 can uniformly mix the reaction materials, and the reaction is thorough; A vertical condensing pipe 13 is also provided, and the high-temperature solvent vapor generated by the reaction kettle enters the vertical condensing pipe 13 , and a casing 21 is provided outside the vertical condensing pipe 13 .

The sleeve pipe 21 communicates with the cooling water inlet pipe 27 and the cooling water outlet pipe 28 , and the cooling water outlet pipe 28 is arranged above the cooling water inlet pipe 27 . The upper end of the vertical condensing pipe 13 is connected to the horizontal condensing pipe 15 through the pipeline 14, and the end of the horizontal condensing pipe 15 away from the pipeline 14 is connected to the water separator 16, and the bottom of the water separator 16 is provided with an opening 17, and the water separator 16 is connected to the pneumatic A first valve 19 is provided between the diaphragm pump 18 , the water separator 16 and the pneumatic diaphragm pump 18 , and the pneumatic diaphragm pump 18 is provided with an electromagnetic pneumatic valve 20 for operation by the operator.

The pneumatic diaphragm pump 18 pumps out the low-temperature solvent in the water separator 16. The pneumatic diaphragm pump 18 is connected to the nozzle 23 through the pipeline 29. The nozzle 23 is connected to the pipeline 14. The nozzle 23 sprays water downward to cool the high-temperature solvent vapor, and part of the low-temperature solvent As the high-temperature solvent vapor rises into the horizontal condensing pipe 15, part of it flows into the reaction kettle through the vertical condensing pipe 13, the pipeline 29 is provided with a second valve 22, and the horizontal condensing pipe 15 is provided with a thermal resistor 24 near the position of the pipeline 14. 24 connect the temperature display 25.

The scraper mechanism 5 is U-shaped as a whole, and cooperates with the end surface of the kettle body 8. When the low-speed stirring shaft 11 rotates, the scraper mechanism 5 will rotate accordingly, thereby removing the raw materials stuck to the inner wall of the kettle body 8. scrape off. In addition, the surfaces of the stirring teeth 3 and the stirring blades 4 are lined with glass.

The operator controls the amount of low-temperature solvent added to the nozzle 23 by controlling the electromagnetic pneumatic valve 20 and the pneumatic diaphragm pump 18, thereby controlling the temperature of the high-temperature solvent vapor entering the distillation device.

A temperature controller 26 is provided between the temperature display screen 25 and the electromagnetic pneumatic valve 20, and the nozzle 23 sprays out low-temperature solvent to cool and control the temperature of the high-temperature solvent vapor, and through the temperature display screen 25 and the temperature controller 20 and the pneumatic diaphragm pump 15 Realize linked work, when the temperature of the distillation head in the horizontal condensation pipe 15 is higher than the temperature set by the temperature controller 20, the output signal of the temperature controller 20 starts the cooling of the pneumatic diaphragm pump 18; when the temperature of the distillation head is higher than the temperature of the temperature controller When the temperature set by 20 is low, the temperature controller 20 cuts off the output signal to stop the pneumatic diaphragm pump 18 from pumping material for cooling, and in this way realizes the function of temperature control.

The preferred implementation of this patent has been described in detail above, but this patent is not limited to the above-mentioned implementation, and within the knowledge of those of ordinary skill in the art, it can also be made without departing from the purpose of this patent. Variations.

Claims (5)

1. A chemical distillation device, comprising a reaction kettle, is characterized in that the reaction kettle is provided with a kettle cover and a still body with an equipment flange, the outside of the still body is provided with a jacket, and the upper part of the jacket is provided with a heat transfer oil outlet, and the jacket The lower end of the tank is equipped with a heat transfer oil inlet, the lid of the kettle is equipped with a material inlet and a material outlet, the kettle body is equipped with a high-speed stirring shaft and a low-speed stirring shaft, the high-speed stirring shaft is equipped with stirring blades from top to bottom, and the low-speed stirring shaft The lower end is connected with a scraper mechanism, the scraper mechanism includes a kettle wall scraper and a bottom scraper, and the inside of the kettle wall scraper is provided with the same number of stirring teeth as the stirring blades, and the stirring blades and the stirring teeth are arranged in a staggered manner , the stirring blade extends into the gap between the two adjacent layers of stirring teeth, the surfaces of the stirring teeth and the stirring blades are also equipped with glass lining, the kettle cover is also equipped with a high-speed motor and a low-speed motor, and the other end of the high-speed stirring shaft and the low-speed stirring shaft extends The outside of the kettle body is respectively connected with a high-speed motor and a low-speed motor; the reactor is also equipped with a vertical condenser pipe, and a sleeve is provided outside the vertical condenser pipe, and the sleeve pipe is connected to the cooling water device, and the upper end of the vertical condenser pipe passes through the pipe The road is connected to the horizontal condensing pipe, and the end of the horizontal condensing pipe far away from the vertical condensing pipe is connected to the water separator. The water separator is connected to the diaphragm pump, and the diaphragm pump is connected to the nozzle through the pipe. A temperature sensor, the temperature sensor is connected to the temperature display. 2. The chemical distillation device according to claim 1, characterized in that an observation hole is also provided on the kettle body. 3. The chemical distillation device according to claim 1 or 2, wherein the cooling water device comprises a cooling water inlet pipe and a cooling water outlet pipe connected to the casing, and the cooling water outlet pipe is located at the cooling water inlet pipe above. 4. The chemical distillation device according to claim 3, wherein the diaphragm pump is a pneumatic diaphragm pump, and the pneumatic diaphragm pump is provided with an electromagnetic pneumatic valve. 5. The chemical distillation device according to claim 4, wherein a temperature controller is arranged between the temperature display screen and the electromagnetic pneumatic valve.