A hydrogen chloride synthesis furnace chlorine hydrogen automatic ratio control method, system and synthesis furnace

Abstract

The present disclosure provides a hydrogen chloride synthesis furnace chlorine hydrogen automatic ratio control method, system and synthesis furnace, the flow rate of chlorine gas is limited by low position selection, and the flow rate of hydrogen gas is limited by high position selection. When the gas flow rate of hydrogen fluctuates and the fluctuation amount When the gas flow is lower than the first hydrogen setting threshold or the gas flow of chlorine fluctuates and the fluctuation is lower than the first chlorine setting threshold, the hydrogen flow and the chlorine flow are mutually sensed and locked through the high-position selection and low-position selection, and the load adjustment and flow When a disturbance occurs, ensure that the proportion of hydrogen is excessive and greater than the lower limit of safety, and no free chlorine will be generated; the control strategy based on the cross-limit principle is adopted to realize the function of automatic adjustment of the ratio of hydrogen to hydrogen in the synthesis furnace, and the chlorine in the hydrogen chloride synthesis furnace is realized under the condition of ensuring safe production. The remote automatic control of the hydrogen flow ratio avoids the hidden dangers of on-site safety risks, and can realize the purpose of automatic reduction and replacement of personnel.

Description

technical field [0001] The disclosure relates to the technical field of chemical synthesis equipment, in particular to a hydrogen chloride synthesis furnace automatic ratio control method, system and synthesis furnace. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] In the production process of the hydrogen chloride synthesis process in the chlor-alkali industry, dangerous gases such as hydrogen, chlorine, and hydrogen chloride are involved. The degree of automation in the traditional production mode is low, and the gas supply operation mainly includes on-site manual operation and remote manual operation. [0004] The inventors of the present disclosure found that the manual operation has the following defects: (1) The furnace pressure of the synthesis furnace is not adjusted in time, resulting in an imbalance in the proportion of hydrog...

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Problems solved by technology

[0004] The inventors of the present disclosure found that the manual operation has the following defects: (1) The furnace pressure of the synthesis furnace is not adjusted in time, resulting in an imbalance in the proportion of hydrogen and chlorine gas entering the furnace. , free chlorine exceeds the standard, it will react with acetylene gas in the VCM conversion process, generate extremely explosive chloroacetylene and release a large amount of heat, which poses a great threat to safe and stable production; (3) the degree of automation of the hydrogen chloride gas delivery process is relatively backward, The labor intensity is high, the accident rate is high, and production accidents caused by improper manual operation occur from time to time

[0005] In addition, people in the industry have also designed an automatic control method of double closed-loop ratio loop control, such as figure 1 As shown, there are still problems and potential safety hazards in this automatic control method, which can be summarized as the following two points: (1) The molecular weight of hydrogen gas is low, the escape property is good, and the condensed water in hydrogen gas is easy to interfere with the measurement; (2) In the automatic control state, the hydrogen compressor Suddenly stop, the problem of excessive chlorine in hydrogen chloride gas cannot be avoided, and the safety hazard of the production system still exists

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