Safety device for air separation low-temperature liquid discharging system

Abstract

The invention discloses a safety device for an air separation low-temperature liquid discharging system, and belongs to the technical field of low-temperature liquid discharging in air separation of a cryogenic method. The safety device for the air separation low-temperature liquid discharging system comprises a residual liquid pit, cobblestones, a drainage inlet pipeline, a reducing four-way device, a drainage outlet pipeline and a water sealing well, wherein the residual liquid pit is filled with the cobblestones, the head of the drainage inlet pipeline extends below the residual liquid pit, a middle pipeline is buried and laid, the tail is connected with an inlet of the reducing four-way device, an outlet is connected with the head of the drainage outlet pipeline, and the tail is connected to a factory drainage system; the reducing four-way device 4 has a safe water sealing effect and is arranged in the water sealing well. The safety device for the air separation low-temperature liquid discharging system has the advantages that the safe and stable operation of an air separation drainage system can be ensured, steam condensate water and rainwater can be collected and quickly introduced into the drainage system, the situation that low-temperature liquid automatically flows to a drainage ditch can be prevented, potential safety hazards in production are solved, and the safe production of an air separation device area and a low-temperature liquid storage tank area is ensured.

Description

technical field [0001] The invention belongs to the technical field of low-temperature liquid discharge in cryogenic air separation, and in particular relates to a safety device for an air separation low-temperature liquid discharge system, which is suitable for safe discharge of low-temperature liquid in an air division of a cryogenic oxygen plant and a liquid tank area. Background technique [0002] With the rapid development of my country's industrial technology, industrial gases such as oxygen, nitrogen, and argon, as important raw materials necessary for modern industrial production, are widely used in petroleum, chemical, metallurgy, machinery, electronics and other industries. With the advancement of science and technology, the production scale of enterprises in various industries has been continuously improved, and the demand for industrial gases has also increased. At present, domestic and foreign industrial enterprises mostly use cryogenic method to realize air sep...

AI Technical Summary

Problems solved by technology

However, the condensed water after steam heat exchange in the liquid drainage evaporator, the condensed water of the pipe network steam trap group, and rainwater will all enter the pit. If they cannot be discharged in time, when low-temperature liquid flows in, the original water in the pit will freeze quickly; When the water level in the pit is very high and the discharge of cryogenic liquid is large, the cryogenic liquid will be discharged to the surroundings of the air separation equipment, affecting the surrounding environment and equipment foundation, etc., bringing serious safety hazards

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