Hydrochloric acid storage tank damage cause analysis and preventive measures

Hydrochloric acid storage tank is one of the main equipment for synthesizing hydrochloric acid section. Because hydrochloric acid has strong corrosion, most chlor-alkali plants now use glass fiber reinforced plastic storage tanks with good corrosion resistance.

FRP material is brittle, tensile and compressive resistance is poor, so the equipment is not pressure resistant. The raw material for the synthesis of hydrochloric acid, chlorine gas, is mixed to form an explosive mixture. Therefore, the above characteristics should be considered in the design, installation and operation of synthetic hydrochloric acid device, otherwise it will bring hidden dangers to the safe use of hydrochloric acid storage tank. In order to prevent the recurrence of similar accidents, the following Xiaobian will introduce the cause analysis and preventive measures for hydrochloric acid storage tank damage, hoping to help you.

There are two kinds of damage to hydrochloric acid storage tanks: one is explosion type, and the other is deflated type. Neither explosive gas mixture nor excessive negative pressure is formed in the tank. Our factory has taken the following preventive measures:

1. The original design of the absorption system of the synthetic hydrochloric acid device uses three levels of absorption, one and two levels of falling film absorption, and three levels of filler absorption, which is more perfect.

2, the process configuration should be reasonable, avoid short circuit of gas, make full use of all levels of absorption, you can cut off the absorption system.

3, the use of gas phase balance pipe, to balance the system pressure, when one tank into acid or acid, can use the pressure of another tank to balance, will not produce too high negative pressure, can be water seal pressure relief.

In this way, the improved hydrochloric acid storage tank will not form explosive mixed gas, and will not produce too high negative pressure, that is, cut off the absorption system after the addition, and give full play to the potential of the original device, shorten the process, save costs, and eradicate hidden dangers.