Automatic protective control device for fiber reinforced plastic hydrochloric acid storage tank

Abstract

The invention relates to an automatic protective control device for a fiber reinforced plastic hydrochloric acid storage tank. The device aims at solving the problems that during use of fiber reinforced plastic hydrochloric acid storage tanks in the current domestic chemical industry for making chlorine and alkali, the pressure of gas-phase parts in the tanks change intensively due to feeding or discharging of liquid, correspondingly the storage tanks are likely to explode or get shrunken, and hydrogen chloride gas directly overflows to the outside and pollutes the environment. According to the automatic protective control device, by arranging a pressure transmitter and an electric butterfly valve on the top of the tank, arranging an acid discharging pump on the outer side of the bottom ofthe tank and arranging a hydrogen chloride gas absorption tower and an exhaust fan outside the tank, it is ensured that the fiber reinforced plastic hydrochloric acid storage tank is used safely on the premise of meeting environmental protection requirements. The device is safe, reliable, easy to control, convenient to check, environmentally friendly, economical and capable of effectively ensuring safe use of the hydrochloric acid storage tank.

Description

technical field [0001] The invention belongs to the field of machinery, and in particular relates to an automatic protection control device for a glass fiber reinforced plastic hydrochloric acid storage tank. Background technique [0002] In the chlor-alkali chemical industry, the high-concentration hydrochloric acid inside the FRP hydrochloric acid storage tank is highly corrosive and volatile, so the storage tank is generally made of FRP or other anti-corrosion materials. There will be changes, positive pressure will be generated during the liquid intake process, and negative pressure will be generated during the liquid discharge process, which will easily cause the accident of storage tank rupture. At present, one of the common protection methods for hydrochloric acid storage tanks is to install an atmospheric communication pipe that is directly connected to the atmosphere, and discharge volatile hydrogen chloride gas directly into the atmosphere, so as to maintain normal...

AI Technical Summary

Problems solved by technology

The use of atmospheric communication pipes has high reliability, but volatile gases will enter the atmosphere and cause environmental pollution; when using respirators to regulate pressure, it is easy to cause deterioration of the respirator material due to corrosion, failure of shrapnel, blockage and bonding by residue crystallization, making it Sensitivity decreases or even fails, causing the pressure not to be released in time when the tank is filled and drained, resulting in a decrease in the safety and reliability of the tank, and in severe cases, the tank ruptures, causing a safety accident

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