A liquid recovery device for water ring vacuum pumps used in the production of carbon fiber precursors

Abstract

The invention discloses a liquid recovery device of a water ring vacuum pump for producing carbon fiber precursors, and belongs to the technical field of cyclic utilization of waste water and waste gas. The liquid recovery device comprises a water ring vacuum pump, a cooler, a circulating water storing device, a condenser and a gas-liquid regelation recovery device, wherein an exhaust hole and a liquid drain pipe of the water ring vacuum pump communicate with the circulating water storing device by a gas-liquid mixing pipeline; the cooler communicates with a circulating water outlet of the circulating water storing device and a liquid inlet pipe of the water ring vacuum pump by a circulating water pipeline; the condenser communicates with a gas inlet hole of the water ring vacuum pump by a gas path pipeline I; an exhaust opening of the circulating water storing device is connected with an inlet of the gas-liquid regelation recovery device; and a liquid outlet of the gas-liquid regelation recovery device communicates with the circulating water pipeline. According to the liquid recovery device disclosed by the invention, the circulating water storing device and the cooler are arranged in a separating manner, so that cooling treatment is only performed on water for cycling, oil pollutants and the like brought out from the water ring vacuum pump are not cooled, and the utilization rate of resources is improved.

Description

technical field [0001] The invention relates to a liquid recovery device for a water ring vacuum pump used in the production of carbon fiber precursors, and belongs to the technical field of recycling waste water and waste gas. Background technique [0002] A large amount of solvent, such as DMSO, is used in the production of carbon fiber. In order to reduce the production cost, it is often necessary to recycle the solvent. Recovery by condensation is a very common method. Among them, in the condensation recovery, the water ring vacuum pump is often used as a power device. [0003] Although the water ring vacuum pump is a vinegar vacuum pump that is widely used in the fields of petroleum, chemical industry, machinery, mining, light industry, medicine and food. However, the water ring vacuum pump needs a lot of water in the working process, and the recovery process of DMSO will inevitably bring a part of the solvent to the circulating water of the water ring vacuum pump. I...

AI Technical Summary

Problems solved by technology

If part of the circulating water is directly discharged, it will waste a lot of water resources and cause pollution to the environment

However, since the water temperature of the water ring vacuum pump will rise by 10-15 °C after the water is discharged, at the same time, the water ring vacuum pump will also produce some pollutants during use, which will cause damage to the circulation device and other equipment.

At the same time, since DMSO is soluble in water, it is highly corrosive to iron and other metals.

Therefore, in the existing production of carbon fiber precursors, the water used by the water ring vacuum pump is generally directly excluded, causing great harm to the environment

At present, there is a lack of a liquid recovery device that can realize the water ring vacuum pump for carbon fiber precursor production

Images