Temperature control system of exothermic reaction process

A temperature control system and exothermic reaction technology, applied in the chemical industry, can solve problems such as the decrease of circulating water flow, the inability to remove the reaction heat in time, and the out-of-control oxidation reaction temperature, so as to slow down the temperature rise, increase the correction time, and realize the fault state Effect

Pending Publication Date: 2020-01-03
CHONGQING HUAFON CHEM +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the regulating valve is closed due to a fault, the circulating water flow rate will drop sharply, or even be zero, and the reaction heat cannot be removed in time, resulting in an out-of-control oxidation reaction temperature

Method used

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  • Temperature control system of exothermic reaction process
  • Temperature control system of exothermic reaction process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] see figure 1 and figure 2 , the temperature control system of the exothermic reaction process includes a driving pump 1 , a first heat exchanger 2 , a second heat exchanger 3 , and a flow controller 4 . The first heat exchanger 2 is used to absorb the heat of the exothermic reaction process, and the second heat exchanger 3 is used to release heat to the outside. In this embodiment, the first heat exchanger is a serpentine tube, and the serpentine tube The upstream end of the coiled tube is the cooling medium inlet, the downstream end of the serpentine tube is the cooling medium outlet, the second heat exchanger is a tube heat exchanger, the cooled medium passes through the tube side of the tube heat exchanger, and the cooling medium passes through the tube side The shell side of the heat exchanger passes through. Of course, the second heat exchanger can also be a plate heat exchanger, which uses air to passively dissipate heat. The cooling medium inlet of the first h...

Embodiment 2

[0030] Take the temperature control of nitric acid oxidation reaction process in the process of producing adipic acid as an example. see figure 1, placing the first heat exchanger in the oxidation reactor, injecting cooling water into the closed circulation line, driving the pump to drive the cooling water to circulate in the closed circulation line, the flow controller is electrically connected to the temperature sensor in the oxidation reactor, To achieve the purpose of automatic flow adjustment. Use nitric acid, alcohol and ketone (or cyclohexanol) as raw materials, and put them into the oxidation reactor. When the reaction proceeds, the temperature in the oxidation reactor rises, and the cooling water heats up at the first heat exchanger, and the heat in the oxidation reactor Take away, keep the temperature in the oxidation reactor stable, the cooling water after heating is cooled at the second heat exchanger, and pumped back to the first heat exchanger through the drive ...

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PUM

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Abstract

A temperature control system for an exothermic reaction process comprises a driving pump, a first heat exchanger, a second heat exchanger and a flow controller, wherein a cooling medium inlet of the first heat exchanger is connected with an outlet of the driving pump through a pipeline, a cooling medium outlet is connected with a cooled medium inlet of the second heat exchanger through the pipeline, a cooled medium outlet of the second heat exchanger is connected with an inlet of the driving pump through the pipeline to form a closed circulation line; the flow controller is connected on the closed circulation line in series; the temperature control system also comprises an emergency bypass pipeline or a pressure type overflow valve, a upstream end of the emergency bypass pipeline is connected with an inlet of the flow controller in parallel, a downstream end of the emergency bypass pipeline is connected with an outlet of the flow controller in parallel, the flow area of the emergency bypass pipeline is 1/9-1/2 of the flow area of the flow controller, an inlet of the pressure type overflow valve is connected with an inlet of the flow controller in parallel, and the outlet is connected in parallel with the outlet of the flow controller. The temperature control system disclosed by the invention is simple in structure and high in reliability, and effectively meets the requirementof safe production in the exothermic reaction process.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a temperature control system for an exothermic reaction process. Background technique [0002] In the field of chemical industry, involving exothermic reaction process, it is necessary to strictly control the temperature of the process to keep it within an appropriate range to ensure the normal progress of the reaction. [0003] For example, the production of adipic acid. Adipic acid belongs to aliphatic carboxylic acid, commonly known as fatty acid, and its molecular formula is C 6 h 10 o 4 , the appearance is white crystalline powder, stable in nature, not deliquescent. It is mainly used in the manufacture of nylon 66 (nylon 66) and polyurethane resin, and secondly in the manufacture of plasticizers, greases, a small amount of food acidifier and instead of tartaric acid for fermentation powder, and can also be used in the manufacture of insecticides and viscous Mixture, ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/18
CPCB01J19/18B01J2219/00081B01J2219/00087
Inventor 陈恩之姜曦徐淑媛赵风轩张传礼谢毅于彬杨建新
Owner CHONGQING HUAFON CHEM
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