CN215026114U - Multifunctional continuous rectifying device for high-temperature and high-viscosity products - Google Patents

Abstract

The utility model relates to a multi-functional continuous rectification device for high temperature, high viscosity product, including head tank, rectifying column, reboiler, conveying system, automatic distributor, top of the tower condenser, vacuum system and product collecting system, the head tank links to each other with the rectifying column, the rectifying column passes through conveying system and links to each other with the reboiler, the top of the tower condenser passes through automatic distributor and the top of the tower of rectifying column and links to each other, vacuum system links to each other with the top of the tower condenser, product collecting system links to each other with the rectifying column. This a multi-functional continuous rectification device for high temperature, high viscosity product degree of automation is higher, and system operation is convenient, has reduced the energy consumption cost, and the material flows the in-process, can not crystallize, and jam or the dead phenomenon of card can not appear in moving, quiet equipment and pipeline, and material intensification rate promotes, and the accuse temperature precision is higher, reaches gasification temperature sooner to increased gasification volume, made the rectifying column reach gas-liquid equilibrium sooner.

Description

Multifunctional continuous rectifying device for high-temperature and high-viscosity products

The technical field is as follows:

the utility model relates to a high temperature, high viscosity product processing technology field especially relate to a multi-functional continuous rectification device for high temperature, high viscosity product.

Background art:

with the rapid development of the chemical industry, the countries in the europe and the united states restrict export of high-end products in China, so that enterprises put forward higher requirements for research and development of the high-end products, and the high-end products with high temperature and high viscosity have higher requirements for devices in process design because most of the products belong to heat sensitivity.

Mainly still use traditional rectifying column to its continuous or intermittent production to be the owner, the rectification technology mainly reaches the separation requirement around "material balance, heat balance, gas-liquid balance" three point, so separate high temperature, high viscosity product with traditional rectifying column, the process route is difficult to break through, the device just hardly reaches stable continuous operation in earlier stage research and development experiment, finally can not realize final industrialized volume production, to three main points of above rectification, the following these aspects are reflected to main problem:

1. the traditional feeding/discharging pump conveys high-temperature and high-viscosity products, the flow is unstable, even the pump head can not discharge the materials, and in the running process, the pump head is easy to block, and finally the pump head is locked and can not work;

2. the high vacuum degree of the system can not be reached, the separation is realized by increasing the temperature at the bottom of the tower in the operation process, the product is locally overheated after the temperature is increased, the heat-sensitive product has the characteristic of easy decomposition, new impurities are decomposed from the product, and finally the qualified product can not be obtained;

3. because the product has high viscosity and poor fluidity, the heat loss is large due to long pipelines, and the heat preservation effect is difficult to achieve by ordinary heat preservation, the product is easy to crystallize in the flowing of the pipelines, so that the pipelines are blocked and can only be stopped finally;

4. the product has larger molecular weight and relatively poorer thermal conductivity, the traditional reboiler form cannot meet the heat exchange requirement, the retention time of the tower kettle material in the temperature rising process is too long in the rectification process, the temperature difference between the material and a heat transfer medium is larger, the color and the purity of the tower bottom product are finally influenced, and even the risk of product carbonization is caused by overhigh temperature;

5. in the rectification process, the rectification tower is difficult to achieve three-phase balance, the gasification amount is too small in the evaporation process, the tower column is too high, the distillate is easy to form internal reflux in the middle section of the tower, the steam is difficult to climb to the top of the tower, and finally the gas-liquid balance is difficult to establish;

6. the traditional reflux ratio can not meet the normal operation, and the reflux/extraction discharge pipe orifice is often blocked, so that the normal reflux ratio can not be adjusted.

7. In the electric heat tracing heating process of the whole system, due to poor temperature control precision and high temperature rise rate, the local temperature is too high, heat-sensitive products are easily scrapped, and the processing capacity is not large, the pipeline is thin, and the heat preservation of the electric heat tracing auxiliary group is difficult to meet the explosion-proof requirement;

8. due to the characteristics of products, the tower kettle and the storage tank cannot observe the actual liquid level in the operation process of the traditional liquid level meter, so that the interlocking is out of control, and finally the system is paralyzed.

The utility model has the following contents:

in view of the eight problems mentioned above, we have made design improvements for the process:

firstly, the raw materials are preheated, a disturbance device is additionally arranged on the equipment, the heat transfer rate of the raw materials is improved, after the materials reach the preheating temperature, the flow is controlled by a pump and then the materials are conveyed into a rectifying tower, and after a pump head and a pipeline are improved, the materials cannot be crystallized in the advancing process, the flow is smooth, and the flow control is accurate.

Secondly, after the material enters a reboiler of the tower kettle, the time for separating fractions to reach a bubble point is greatly shortened in the temperature rise process of the material, the retention time in the material heating process is short, and the risk of local overheating or carbonization of the material is avoided. We have increased the body of the tower precision accuse temperature of rectifying column, have set up temperature heating parameter adjusting device, ensure that steam can be smoothly and quick climb to the top of the tower to through our design, the temperature of body of the tower is less than steam temperature far away, avoids the rectifying column to become second reboiler, influences the interior gas-liquid balance of tower, makes going on that the rectification can be smooth.

The integral heat preservation or temperature control is realized by configuring an integral circulating temperature control system, so that the temperature control precision is high, the heating rate is stable, the fluctuation is relatively small, the steam temperature of the rectifying tower can meet the gradient requirement, and the heating medium is far lower than the upper limit of the material temperature. The reflux ratio automatic distributor enables the whole rectification reflux ratio adjusting process to be more accurate and convenient and the work to be stable.

Finally, a vacuum system is improved, the system is ensured to reach high vacuum, and the highest vacuum can reach the absolute pressure of below 10 Pa.

The utility model discloses a realize through following technical scheme:

the utility model provides a multi-functional continuous rectification device for high temperature, high viscosity product, includes head tank, rectifying column, reboiler, conveying system, automatic distributor, overhead condenser, vacuum system and product collecting system, the head tank links to each other with the rectifying column, the rectifying column passes through conveying system and links to each other with the reboiler, overhead condenser passes through automatic distributor and links to each other with the top of the tower of rectifying column, vacuum system links to each other with overhead condenser, product collecting system links to each other with the rectifying column.

In order to ensure the rectification effect, a preheater is arranged at the outlet end of the raw material tank.

Further, the preheater is connected with the rectifying tower sequentially through the delivery pump and the disturbance device.

Preferably, the product collecting system comprises an overhead product collecting system and a bottom product collecting system, and the finished products at the top and the bottom of the tower can be collected respectively.

In order to facilitate the collection of the product, the automatic dispenser is a reflux ratio automatic dispenser.

Compared with the prior art, the multifunctional continuous rectifying device for the high-temperature and high-viscosity products adopts the technical scheme, and has the following technical effects:

(1) in the material flowing process, crystallization can not occur, and the phenomena of blockage or blockage of moving equipment, static equipment and pipelines can not occur;

(2) the vacuum degree of the system is improved, the temperature of the tower kettle is reduced, and the energy consumption cost is reduced;

(3) the material temperature rise rate is improved, the temperature control precision is higher, the gasification temperature is reached more quickly, and the gasification amount is increased, so that the gas-liquid balance of the rectifying tower is reached more quickly;

(4) the automation degree is higher, the system operation is convenient, and the whole appearance is compact and beautiful.

Description of the drawings:

fig. 1 is a schematic diagram of the multifunctional continuous rectification device for high-temperature and high-viscosity products of the present invention.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be clearly and clearly defined.

The multifunctional continuous rectification device for high-temperature and high-viscosity products as shown in fig. 1 comprises a raw material tank 1, a preheater 2, a delivery pump 3, a disturbance device 4, a rectification tower 5, a reboiler 6, a delivery system 7, an automatic distributor 9, an overhead condenser 8, a cryogenic system 10, a vacuum system 11, a product collection system 13, a product collection system 14, and related pipelines and valves.

According to the design requirements of the product process, starting a temperature control system, setting corresponding temperature, starting feeding after main equipment and material pipelines reach the set temperature, setting corresponding parameters of a tower top condenser 8 and a deep cooling system 10, starting a vacuum system 11, setting and adjusting corresponding vacuum degree, and starting a heating system of a reboiler 6; the raw material in the raw material tank 1 is preheated by a preheater 2, the heat transfer rate of the raw material is improved, after the material reaches the preheating temperature, the flow is controlled by a conveying pump 3, the raw material is conveyed into a rectifying tower 5 by a disturbance device 4, the temperature of the material starts to rise, the tower top of the rectifying tower 5 quickly rises to the corresponding temperature, the fraction starts to be collected, the appropriate reflux ratio is adjusted by an automatic distributor 9, the material starts to be sampled and collected, in the process of collection and analysis, automatic sampling is carried out by a vacuum sampling system, the sampling is ensured to be accurate, the product is automatically discharged after being qualified, the material at the top of the rectifying tower 5 enters a product collecting system 13, the material at the bottom of the rectifying tower 5 enters a product collecting system 14 by a conveying pump 12, the product collecting system displays the weight of the material in real time, the waste gas generated by the rectifying tower 5 enters a tower top condenser 8, the waste gas is treated by a vacuum system 11 and a deep cooling system 10 and then is exhausted by a safety valve, and into the exhaust system or atmosphere.

Finally, it should be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (5)

1. A multi-functional continuous rectification device for high temperature and high viscosity products is characterized in that: including head tank, rectifying column, reboiler, conveying system, automatic distributor, tower top condenser, vacuum system and product collecting system, the head tank links to each other with the rectifying column, the rectifying column passes through conveying system and links to each other with the reboiler, the tower top condenser passes through the top of automatic distributor and rectifying column and links to each other, vacuum system links to each other with the tower top condenser, product collecting system links to each other with the rectifying column.

2. The multifunctional continuous rectification apparatus for high temperature, high viscosity products of claim 1 wherein: and a preheater is arranged at the outlet end of the raw material tank.

3. The multifunctional continuous rectification apparatus for high temperature, high viscosity products of claim 2 wherein: the preheater is connected with the rectifying tower sequentially through the delivery pump and the disturbance device.

4. The multifunctional continuous rectification apparatus for high temperature, high viscosity products of claim 1 wherein: the product collection system comprises a tower top product collection system and a tower bottom product collection system.

5. The multifunctional continuous rectification apparatus for high temperature, high viscosity products of claim 1 wherein: the automatic distributor is a reflux ratio automatic distributor.

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