Temperature Control for High Pressure Reactor

High-pressure reactor is a kind of equipment container that can carry out comprehensive reactions, such as hydrolysis reaction, neutralization reaction, crystallization reaction, distillation reaction, steam reaction, polymerization reaction and various constant temperature reactions.

High-pressure reactor is widely used in petroleum, chemical, rubber, pesticide, dye, medicine and food industries to complete sulfonation, nitration, hydrogenation, hydrocarbonization, polymerization, condensation and other processes, as well as many other processes of organic dyes and intermediates.

The working temperature in the high-pressure reactor has a great influence on the chemical reaction. When analyzing the characteristics of the object, many simplifications and assumptions are made for the convenience of analysis, such as ignoring the energy loss in heat exchange, ignoring many complex chemical phenomena and uncertain factors in the reaction process, etc. In fact, the working temperature of the reactor as the controlled object is compared with the general industrial object, and has the following characteristics:

First, nonlinearity. For a temperature process system, there are three forms of heat transfer: conduction, convection and radiation, but the proportion of each form of heat transfer is different at different stages. In fact, only one-dimensional heat conduction can be regarded as linear, radiation heat is the fourth power function of the problem, and convection heat transfer is affected by many factors and is generally nonlinear.

In the entire temperature range, the dynamic parameters of the controlled object change with the change of temperature. In the small temperature range near the working point, its dynamic characteristics can be regarded as approximately linear. In view of the above characteristics of the controlled object, the requirements of robustness and rapidity of the system should be comprehensively considered to improve the accuracy and stability of temperature measurement. Finally, a controller with good reliability, stability and high cost performance of the system is designed and developed.

The second is time lag. During the reaction process, there is a strong thermal effect, which causes the temperature in the high-pressure reactor to rise sharply. After that, liquid nitrogen is passed through the jacket to take away the excess heat to reduce the temperature in the reactor. However, since the heat exchange between the reactor and the outside world mainly relies on the partition wall of the reactor for heat conduction, it takes a certain amount of time for the inner wall to heat the entire reactor, so the system shows a large time lag effect.

The third is time variation. The temperature control characteristics of the autoclave mainly depend on the intensity of the chemical reaction in the autoclave. The entire production process has obvious time-varying properties, from the initial heating, the intermediate constant temperature to the final cooling. Moreover, for a specific stage, due to the unstable speed of the chemical reaction, the process gain, inertia time and pure lag will also change accordingly.

We provide complete temperature control systems design and manufacturing. From standard models to complete customized products. We specialize in customer service and are dedicated to helping each customer have the optimal temperature control system for their specific need.

We provide non-standard customized solutions. Both single cooling chillers and cooling & heating combo units are available.

Email: lilia@lneya.com    WeChat ID: +8615251628237    WhatsApp: +86 17851209193

1.Cooling and Heating Systems

Cooling and Heating Systems (SUNDI series)

(Custom Designs)

• Temperature range: -120℃ ~ +350℃
• High-precision, intelligent temperature control
• Cooling capacity: 0.5kW ~ 1200kW
• Fully closed system to extend the service life of thermal fluid
• Each device is load tested for more than 12 hours

Cooling and Heating Circulators

(Custom Designs)

• Temperature range: -45℃ ~ +250℃
• Emerson Copeland compressor, reliable quality
• Self-diagnosis function, multiple safety protection devices
• Fully closed system to extend the service life of thermal fluid
• Each device is load tested for more than 12 hours

Cooling and Heating Systems (WTD series)

(Custom Designs)

• （Micro channel / tube reactors specialized）
• Temperature range: -70℃ ~ +300℃
• High-performance circulation pump, more stable temperature control effect
• Wide temperature range to meet the needs of more industries
• Each device is load tested for more than 12 hours

TCU Multi-reactors Temperature Control System

(Custom Designs)

• Temperature range: -120℃ ~ +250℃
• Sealed, repeatable temperature control
• Built-in electric heating thermal oil auxiliary system
• Add cold and heat source heat exchange modules according to needs
• Each device is load tested for more than 12 hours

2.Cooling Chillers

Low Temperature/Cryogenic Chillers (Water Cooled)

(Custom Designs)

• Temperature range: -150℃ ~ -5℃
• International brand compressor, high cooling efficiency
• Secondary subcooling technology, fast cooling speed
• Automated control and operation, efficient and energy-saving
• Each device is load tested for more than 12 hours

Six product series

Recirculating Chiller/Refrigerated Circulator (Air Cooled)

(Custom Designs)

• Temperature range: -120℃ ~ +30℃
• International brand compressor, cascade refrigeration technology
• Use ethylene glycol or a mixture of ethylene glycol and water
• Fully sealed design to ensure the purity of the medium
• Each device is load tested for more than 12 hours

Five product series

Small Chillers / Mini Chillers

(Custom Designs)

• Temperature range: -18℃ ~ +35℃
• International brand compressor, stable performance
• Microcomputer controller, adjustment unit 0.1℃
• Energy saving, high temperature control accuracy
• Each device is load tested for more than 12 hours

Two product series

High Temperature Chillers

(Custom Designs)

• Temperature range: -100℃ ~ +80℃
• International brand compressors and other accessories
• Fully sealed design to ensure the purity of the medium
• PLC programmable controller
• Each device is load tested for more than 12 hours

Five product series