CN210138477U - Temperature control device for rectification blanking pipe in preparation of 3, 5-dimethylpiperidine - Google Patents
Temperature control device for rectification blanking pipe in preparation of 3, 5-dimethylpiperidine Download PDFInfo
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- CN210138477U CN210138477U CN201922239672.9U CN201922239672U CN210138477U CN 210138477 U CN210138477 U CN 210138477U CN 201922239672 U CN201922239672 U CN 201922239672U CN 210138477 U CN210138477 U CN 210138477U
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Abstract
The utility model relates to a temperature control device of a rectification blanking pipe in the preparation of 3, 5-dimethylpiperidine, which comprises a condenser, wherein a discharge port of the condenser is connected with a blanking pipe of the condenser, the blanking pipe of the condenser is provided with a heating pipe, a feed port of the heating pipe is connected with a discharge port of a hot water tank through a hot water pump, and the discharge port of the heating pipe is connected with the hot water tank; the hot water tank is connected with the steam inlet tank through a pneumatic control valve, and the hot water tank is also provided with a temperature transmitter which is connected with the pneumatic control valve. The utility model discloses set up the companion's of condenser unloading pipe heat alone through the hot-water cylinder, can the companion's of accurate control condenser unloading pipe heat temperature through the hydrothermal temperature in the control hot-water cylinder. The hot water tank is heated by steam, and the temperature in the hot water tank is accurately controlled by a pneumatic control valve and a temperature transmitter.
Description
Technical Field
The utility model relates to a temperature control device of rectification unloading pipe in 3, 5-dimethylpiperidine preparation belongs to chemical industry equipment technical field.
Background
3, 5-dimethylpiperidine is an important pharmaceutical intermediate, and a rectification operation is often used in the preparation process. In the rectification process, the temperature of a rectification blanking pipe of some products needs to be controlled between 50 and 70 ℃, and the products can be normally discharged only in the temperature range. Therefore, the temperature of the rectification blanking pipe needs to be accurately controlled to realize smooth blanking.
For the material of the rectification product condensed by the condenser, the material temperature is usually not in the optimal blanking temperature range, which causes blanking difficulty. The blanking difficulty caused by too low blanking temperature can be solved by carrying out heat tracing on the blanking pipe in the prior art, but the heat tracing in the prior art mostly adopts electric heat tracing or copper pipe heat tracing, the heat tracing temperature cannot be reached or the temperature is uncontrollable, the blanking pipe is easily blocked or the high-temperature vaporization blanking is not smooth.
In addition, chinese patent document CN208365209U discloses a 2-pyrrolidone conveying pipeline, which includes a conveying pipe and a heat tracing pipe arranged in the conveying pipe, wherein two ends of the heat tracing pipe pass through outer walls of two ends of the conveying pipe, and the conveying pipeline further includes a heat exchanging device and a waste heat separating device; the heat exchange device comprises a heat exchanger, a hot water pipe connected with a refrigerant outlet of the heat exchanger and a cold water pipe connected with a refrigerant inlet of the heat exchanger, wherein the other end of the hot water pipe is communicated with the circulating pump, the other end of the circulating pump is connected to the rear end of the heat tracing pipe through a pipeline, and the other end of the cold water pipe is connected to the front end of the heat tracing pipe; the waste heat separation device comprises a pressurizing air pump connected with an exhaust port at the top of the rectifying tower and a vortex tube condenser connected with the pressurizing air pump, wherein the hot end of the vortex tube condenser is connected to a heat medium inlet of the heat exchanger, the cold end of the vortex tube condenser is connected to the circulating pool, and a heat medium outlet of the heat exchanger is connected to the circulating pool through a pipeline. However, the device adopts the steam at the top of the rectifying tower as a heat source, which is not only limited by the rectifying materials, but also the heat tracing temperature can not be accurately controlled within a reasonable range.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a temperature control device of a rectification blanking pipe in the preparation of 3, 5-dimethylpiperidine. The utility model discloses can solve the difficult problem of rectification unloading pipe accuse temperature well, improve the efficiency of rectification, guarantee the quality of product.
The technical scheme of the utility model as follows:
a temperature control device for a rectification blanking pipe in 3, 5-dimethylpiperidine preparation comprises a condenser, wherein a discharge hole of the condenser is connected with a blanking pipe of the condenser, a heating pipe is arranged on the blanking pipe of the condenser, a feed hole of the heating pipe is connected with a discharge hole of a hot water tank through a hot water pump, and a discharge hole of the heating pipe is connected with the hot water tank;
the hot water tank is connected with the steam inlet tank through a pneumatic control valve, and the hot water tank is also provided with a temperature transmitter which is connected with the pneumatic control valve.
The utility model discloses set up the companion's of condenser unloading pipe heat alone through the hot-water cylinder, can the companion's of accurate control condenser unloading pipe heat temperature through the hydrothermal temperature in the control hot-water cylinder. The hot water tank is heated by steam, and the temperature in the hot water tank is accurately controlled by a pneumatic control valve and a temperature transmitter. When the temperature in the hot water tank is lower than a set value, the pneumatic control valve is started, steam enters the hot water tank to be heated, when the temperature in the hot water tank reaches the set value, the pneumatic control valve is closed, and the introduction of the steam is stopped, so that the heating temperature in the heating pipe is accurately controlled, and finally the temperature of a feeding pipe of the condenser is accurately controlled.
According to the utility model discloses, it is preferred, heating pipe and condenser unloading pipe parallel arrangement, perhaps the winding is around condenser unloading pipe.
According to the utility model discloses, it is preferred, condenser unloading outside of tubes side be provided with the heat preservation intermediate layer, wrap up heating pipe and condenser unloading pipe jointly. Therefore, the heat preservation effect of the heating pipe and the blanking pipe of the condenser can be realized, and the energy is saved.
According to the utility model, preferably, a steam inlet in the hot water tank is provided with a steam silencer, the steam silencer is a plurality of layers of sleeves with different diameters, the outlet of the plurality of layers of sleeves is sealed, the inlet is connected with the steam inlet, and the periphery of the plurality of layers of sleeves is uniformly provided with steam exhaust holes;
preferably, the multilayer sleeve is formed by sleeving at least two pipelines with the diameters of 25mm, 50mm, 80mm and 100 mm. Because the steam admission in-process noise is great, causes the noise pollution easily, sets up the steam muffler at the steam entrance, and steam enters into the hot-water cylinder from the steam exhaust hole of multilayer sheathed tube, can reduce steam noise.
According to the utility model discloses, preferably, the condenser include refrigerant entry and refrigerant export, refrigerant entry and refrigerant export are connected with refrigerating fluid feeding tank and refrigerating fluid ejection of compact jar respectively. Namely: the condenser condenses through a refrigerating fluid.
According to the utility model discloses, preferably, the hot-water cylinder be the airtight water tank of cylinder.
The utility model discloses, can be connected with DCS control system (distributed control system) according to prior art, realize automatic control.
The utility model is not explained in detail, and is carried out according to the prior art in the field.
The utility model has the advantages that:
1. the utility model discloses set up the companion's of condenser unloading pipe heat alone through the hot-water cylinder, can the companion's of accurate control condenser unloading pipe heat temperature through the hydrothermal temperature in the control hot-water cylinder. The hot water tank is heated by steam, and the temperature in the hot water tank is accurately controlled by a pneumatic control valve and a temperature transmitter. For example: the temperature of the feeding pipe of the condenser is required to be 50-70 ℃, and the heat tracing temperature can be accurately controlled by controlling the hot water in the hot water tank to be 50-70 ℃. The temperature control effect is easier to control than electric heat tracing and copper pipe heat tracing.
2. The utility model discloses set up the steam muffler in the steam entrance of hot-water cylinder, can noise abatement pollution.
Drawings
Fig. 1 is a schematic view of the main structure of the present invention.
Wherein: 1. the system comprises a condenser, 2, a condenser blanking pipe, 3, a heating pipe, 4, a hot water tank, 5, a hot water pump, 6, a heat preservation jacket, 7, a steam inlet tank, 8, a pneumatic control valve, 9, a temperature transmitter, 10, a temperature alarm, 11, a steam silencer, 12, a refrigerating fluid inlet tank, 13 and a refrigerating fluid outlet tank.
Detailed Description
The present invention will be further described with reference to the following detailed description of illustrative embodiments, but is not limited thereto.
Example 1
As shown in fig. 1, a temperature control device for a rectification blanking pipe in the preparation of 3, 5-dimethylpiperidine comprises a condenser 1, wherein the condenser 1 comprises a refrigerant inlet and a refrigerant outlet, and the refrigerant inlet and the refrigerant outlet are respectively connected with a refrigerating fluid feeding tank 12 and a refrigerating fluid discharging tank 13;
the discharge hole of the condenser 1 is connected with a condenser discharge pipe 2, the condenser discharge pipe 2 is provided with a heating pipe 3, the feed inlet of the heating pipe 3 is connected with the discharge hole of a hot water tank 4 through a hot water pump 5, and the discharge hole of the heating pipe 3 is connected with the hot water tank 4;
the hot water tank 4 is connected with the steam inlet tank 7 through a pneumatic control valve 8, the hot water tank 4 is further provided with a temperature transmitter 9, and the temperature transmitter 9 is connected with the pneumatic control valve 8.
In this embodiment, the heating pipe 3 is arranged in parallel with the condenser discharging pipe 2, and the heat-insulating interlayer 6 is arranged on the outer side of the condenser discharging pipe 2 to wrap the heating pipe 3 and the condenser discharging pipe 2 together. Therefore, the heat preservation effect of the heating pipe 3 and the condenser discharging pipe 2 can be realized, and the energy is saved. The hot water tank 4 is a cylindrical closed water tank.
Example 2
As described in example 1, except that:
the heating pipe 3 is in a coil form and is uniformly wound around the blanking pipe 2 of the condenser.
A steam inlet in the hot water tank 4 is provided with a steam silencer 11, the steam silencer 11 is a multi-layer sleeve with different diameters, the outlet of the multi-layer sleeve is sealed, the inlet is connected with the steam inlet, and steam exhaust holes are uniformly formed in the periphery of the multi-layer sleeve; the multi-layer sleeve is formed by sleeving pipelines with the diameters of 25mm, 50mm and 80 mm. Because the steam admission in-process noise is great, causes the noise pollution easily, sets up steam muffler 11 at the steam entrance, and steam enters into hot-water cylinder 4 from the steam exhaust hole of multilayer sheathed tube, can reduce steam noise.
Example 3
As described in example 2, except that:
the steam silencer 11 is a multi-layer sleeve with different diameters, the outlet of the multi-layer sleeve is sealed, the inlet is connected with the steam inlet, and steam exhaust holes are uniformly formed in the periphery of the multi-layer sleeve; the multi-layer sleeve is formed by sleeving pipelines with the diameters of 25mm, 50mm, 80mm and 100 mm.
The utility model discloses set up condenser unloading pipe 2's companion's heat alone through hot-water cylinder 4, can the accurate control condenser unloading pipe 2's companion's heat temperature through the hydrothermal temperature in the control hot-water cylinder 4. The hot water tank 4 is heated by steam, and the precise control of the temperature in the hot water tank 4 is realized by a pneumatic control valve 8 and a temperature transmitter 9. When the temperature in the hot water tank 4 is lower than a set value, the pneumatic control valve 8 is started, steam enters the hot water tank 4 to be heated, when the temperature in the hot water tank 4 reaches the set value, the pneumatic control valve 8 is closed, and the introduction of the steam is stopped, so that the accurate control of the heating temperature in the heating pipe 3 is realized, and finally the temperature of the condenser feeding pipe 2 is accurately controlled.
Claims (7)
1. A temperature control device for a rectification blanking pipe in 3, 5-dimethylpiperidine preparation is characterized by comprising a condenser, wherein a discharge port of the condenser is connected with a blanking pipe of the condenser, the blanking pipe of the condenser is provided with a heating pipe, a feed port of the heating pipe is connected with a discharge port of a hot water tank through a hot water pump, and a discharge port of the heating pipe is connected with the hot water tank;
the hot water tank is connected with the steam inlet tank through a pneumatic control valve, and the hot water tank is also provided with a temperature transmitter which is connected with the pneumatic control valve.
2. The temperature control device for the rectification blanking pipe in the preparation of 3, 5-dimethylpiperidine as claimed in claim 1, wherein the heating pipe is arranged in parallel with the blanking pipe of the condenser, or is wound around the blanking pipe of the condenser.
3. The temperature control device for the rectification blanking pipe in the preparation of 3, 5-dimethylpiperidine as claimed in claim 1, wherein a heat-insulating interlayer is arranged outside the condenser blanking pipe to jointly wrap the heating pipe and the condenser blanking pipe.
4. The temperature control device of the rectification blanking pipe in the preparation of 3, 5-dimethylpiperidine as claimed in claim 1, wherein a steam inlet in the hot water tank is provided with a steam silencer, the steam silencer is a multi-layer sleeve pipe with different diameters, the outlet of the multi-layer sleeve pipe is sealed, the inlet is connected with the steam inlet, and the periphery of the multi-layer sleeve pipe is uniformly provided with steam discharge holes.
5. The temperature control device of the rectification blanking pipe in the preparation of 3, 5-dimethylpiperidine as claimed in claim 4, wherein the multi-layer sleeve is formed by sleeving at least two pipes with diameters of 25mm, 50mm, 80mm and 100 mm.
6. The temperature control device of the rectification blanking pipe in the preparation of 3, 5-dimethylpiperidine as claimed in claim 1, wherein the condenser comprises a refrigerant inlet and a refrigerant outlet, and the refrigerant inlet and the refrigerant outlet are respectively connected with the refrigerant liquid feeding tank and the refrigerant liquid discharging tank.
7. The temperature control device of the rectification blanking pipe in the preparation of 3, 5-dimethylpiperidine as claimed in claim 1, wherein the hot water tank is a cylindrical closed water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922239672.9U CN210138477U (en) | 2019-12-14 | 2019-12-14 | Temperature control device for rectification blanking pipe in preparation of 3, 5-dimethylpiperidine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922239672.9U CN210138477U (en) | 2019-12-14 | 2019-12-14 | Temperature control device for rectification blanking pipe in preparation of 3, 5-dimethylpiperidine |
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| Publication Number | Publication Date |
|---|---|
| CN210138477U true CN210138477U (en) | 2020-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922239672.9U Active CN210138477U (en) | 2019-12-14 | 2019-12-14 | Temperature control device for rectification blanking pipe in preparation of 3, 5-dimethylpiperidine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115253349A (en) * | 2022-08-03 | 2022-11-01 | 合润科技有限公司 | Rectifying tower structure for separating isopentane by using condensed oil |
-
2019
- 2019-12-14 CN CN201922239672.9U patent/CN210138477U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115253349A (en) * | 2022-08-03 | 2022-11-01 | 合润科技有限公司 | Rectifying tower structure for separating isopentane by using condensed oil |
| CN115253349B (en) * | 2022-08-03 | 2024-02-02 | 合润科技有限公司 | Rectifying tower structure utilizing condensed oil to separate isopentane |
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