Ethylene glycol solution refrigerating system and ethylene glycol circulating solution

Abstract

The invention discloses an ethylene glycol solution refrigerating system and ethylene glycol circulating solution. The ethylene glycol solution refrigerating system comprises an additive storage tank, an ethylene glycol solution storage tank and a refrigerating unit. The additive storage tank, the ethylene glycol solution storage tank and the refrigerating unit are communicated to form a circulating circuit through an ethylene glycol solution circulating pipeline provided with a circulating pump. Ethylene glycol solution in the ethylene glycol solution storage tank is cooled and circulated in the interlayer of the additive storage tank through the refrigerating unit. The ethylene glycol solution comprises 25-35% of ethylene glycol, 0.25-0.35% of disodium hydrogen phosphate, 2.5-3.0% of sodium borate, 0.35-0.50% of sodium benzoate, 0.12-0.15% of TTA, 0.12-0.15% of anti-fouling agent and the balance being deionized water. According to characteristics that ethylene glycol has high boiling point, is not easy to cause evaporation loss and has low freezing point, the interlayer of the initiator storage tank is filled with the ethylene glycol solution, temperature holding is achieved, and running stability in production of polyvinyl chloride is guaranteed. The ethylene glycol solution cannot corrode the pipeline and is free of scaling, thereby keeping the additive in the additive storage tank at the needed temperature stably for a long time.

Description

technical field [0001] The invention relates to a polymerization initiator refrigeration device, in particular to an ethylene glycol solution refrigeration system and ethylene glycol circulating liquid. Background technique [0002] In the production process of polyvinyl chloride, in the polymerization process, additives such as initiators, terminators or emergency terminators need to be added to the polymerization kettle to promote polymerization or terminate the reaction, and there is a certain storage temperature for the additives before adding the additives. If the temperature is too high or too low, it will have a certain impact on the effect of the additives, and then affect the production. [0003] Auxiliaries in the production of polyvinyl chloride are usually stored in auxiliary storage tanks, and there are certain requirements for the refrigerant in the interlayer of storage tanks. During long-term operation, the refrigerant will be oxidized into polymer organic a...

AI Technical Summary

Problems solved by technology

During long-term operation, the refrigerant will be oxidized into polymer organic acid (commonly known as oil sludge), which will cause corrosion to the water tank and water jacket and make it leak; and it is also easy to form a very sticky substance, which is easy to condense after deposition. The scale will cause the system to be blocked, and it will be shut down for maintenance after a period of operation, which will directly affect the economic benefits of the entire PVC production line

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