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Rotary equipment for accurate temperature control of thermosensitive substance and application method

A technology of rotating equipment and substances, applied in chemical instruments and methods, chemical/physical processes, chemical/physical/physical chemical processes, etc., can solve problems such as inability to accurately control the temperature of heat-sensitive materials

Active Publication Date: 2021-09-10
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This equipment solves the problem that the current rotating equipment cannot accurately control the temperature of heat-sensitive materials, and can achieve precise temperature control of heat-sensitive materials with an accuracy of ±0.1°C, and can accurately control the temperature of different heat-sensitive materials in different temperature ranges

Method used

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  • Rotary equipment for accurate temperature control of thermosensitive substance and application method
  • Rotary equipment for accurate temperature control of thermosensitive substance and application method
  • Rotary equipment for accurate temperature control of thermosensitive substance and application method

Examples

Experimental program
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Effect test

Embodiment 1

[0084] Such as figure 2 As shown, this device is used to remove the volatile TDI in the polyurethane prepolymer. The experimental conditions are as follows: the rotational speed of the rotating bed is 200-2000r / min, the volume flow rate of the material is 50L / h, and the devolatilization temperature is 100°C (the boiling point of TDI in vacuum is about 100°C, and the temperature of the material is higher than 110°C and it is easy to oxidize. Yellow, and form foaming), through the use of water / stainless steel gravity heat pipe can accurately control the temperature of the material 100 ℃. The vacuum degree in the rotating bed is 0.099MPa, and the viscosity of the material is about 1Pa·s. The TDI content in the polyurethane prepolymer before and after devolatilization is detected by gas chromatography. At the speed of 2000r / min, this device realizes the removal of 80% of the TDI content in the polyurethane prepolymer in one pass, and the final TDI content is 800-1200ppm , At ...

Embodiment 2

[0086] Such as figure 2 As shown, the fermentation process of hyaluronic acid was studied using the rotating equipment designed in the patent. The strain was provided by the Department of Biochemical Engineering of Beijing University of Chemical Technology, and it was obtained by mutagenesis of Streptococcus zooepidemicus (it will be inactivated when it exceeds 80°C). By adopting water / stainless steel gravity heat pipe and changing the absolute pressure inside the heat pipe, the boiling point of water is controlled to be 75°C. The effects of rotational speed, temperature, pH value, aeration volume, and initial sugar concentration on the fermentation process were studied. It can be determined that the best operating conditions for the production of hyaluronic acid by fermentation are the rotational speed of 1500r / min, the temperature of 60°C, the initial sucrose concentration of 6%, and the gas volume of 1.2m 3 / h, the pH is within the range of 6.8-7.2, the fermentation perio...

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Abstract

The invention discloses rotary equipment for accurate temperature control of a thermosensitive substance and an application method. The rotary equipment comprises a shell, a motor, a liquid inlet, a liquid inlet cavity, a liquid outlet, a rotor, a gravity assisted heat pipe, a temperature control cavity, a gas inlet and a gas outlet. According to the invention, accurate temperature control of the thermosensitive substance can be realized by adjusting the type of the heat pipe and the medium, the accuracy can reach + / -0.1 DEG C, and the problems of scorching, deterioration, inactivation and the like of the thermosensitive substance caused by non-uniform material heating and uncontrollable temperature due to traditional electric heating or medium heat conduction are avoided. The device and the method have important significance in the fields of plastic engineering, bioengineering and biochemistry.

Description

technical field [0001] The invention relates to a rotating device and its application method. More specifically, it relates to a rotating device for precise temperature control of heat-sensitive substances and an application method thereof. Background technique [0002] Heat transfer is an important part of the chemical industry, and it is also a problem that most engineering equipment needs to pay attention to. There are a variety of heat-sensitive substances in the biological and chemical fields, such as polymer prepolymers, fermentation broth containing catalytic enzymes, biomass, etc. In the process of heating these substances, traditional heating methods such as electric heating, radiation heating, high-temperature medium heat conduction, etc., are often difficult to achieve precise temperature control, resulting in deterioration, coking, deactivation and other problems of these materials. [0003] In traditional chemical equipment, the uneven heating of materials is ...

Claims

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Application Information

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IPC IPC(8): B01J19/00
CPCB01J19/0013
Inventor 初广文张霞李燕斌罗勇邹海魁孙宝昌陈建峰
Owner BEIJING UNIV OF CHEM TECH
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