Method for displacing impurities at bottom of water sealed tank of gas holder without shutdown as well as gas holder

Abstract

The invention provides a method for displacing impurities at the bottom of a water sealed tank of a gas holder without shutdown. The method comprises the following steps of: checking whether the top of a vertical overflow pipe is completely opened or not; opening a main water replenishing valve firstly and then opening a root valve; controlling the water inlet quantity of a main water replenishing pipe to be equal to the water draining quantity of a drain pipe; starting to displace water in the water sealed tank; controlling the floating level of a liquid surface to be less than or equal to 18 cm; and closing the valves when checking that the water discharged by the drain pipe reaches a standard, so as to enable the liquid surface in the water sealed tank to be in a standard range and complete the displacement. The gas holder comprises a bell jar, a middle section and the water sealed tank. The drain pipe is arranged at the bottom of the water sealed tank. The root valve and a secondary valve are arranged on the drain pipe. The vertical overflow pipe is arranged on the pipeline between the root valve and the secondary valve, and the top of the vertical overflow pipe is opened. The upper part of the vertical overflow pipe is provided with a transverse overflow pipe which is horizontally arranged and is communicated with the vertical overflow pipe. The water replenishing pipe is arranged at the bottom of the water sealed tank, and the main water replenishing valve and a lower water replenishing valve are arranged on the water replenishing pipe. The gas holder disclosed by the invention is simple in structure and convenient for operation. No explosive accident occurs in operation, and shutdown caused by the displacement at the bottom of the gas holder can be avoided. The displacement work is time-saving, labor-saving, money-saving and safe.

Description

technical field [0001] The invention relates to a device for storing industrial gas, in particular to a method for replacing impurities at the bottom of a water seal tank of a gas cabinet without stopping the vehicle, and the gas cabinet. Background technique [0002] A gas cabinet is a container device used to store various industrial gases and also to balance the inhomogeneity of the required amount of gas. Low-pressure wet gas holders are usually used in coal chemical enterprises. In coal chemical enterprises, gas cabinets are often used to store semi-water gas, and the gas cabinets are composed of a bell jar, a middle section and a water-sealed tank. During the production process of semi-water gas, a large amount of carry-over substances will be produced, including impurities such as particulate matter, coal tar, and tar phenol. If they are not cleaned up on time, it will have a huge impact on the subsequent sections. The existing technology usually stops the equipment ...

AI Technical Summary

Problems solved by technology

During the production process of semi-water gas, a large amount of carried-out substances will be produced, including impurities such as particulate matter, coal tar, and tar phenol. If they are not cleaned up on time, it will have a huge impact on the subsequent sections. The existing technology usually stops the equipment and uses nitrogen, etc. The inert gas replaces the impurities deposited in the water seal tank of the gas cabinet. Since combustible gas is involved, the replacement process is dangerous, and the replacement work is time-consuming and laborious.

Chemical enterprises belong to the continuous production industry. Parking will lead to an increase in the production cost of the enterprise. At present, some chemical enterprises adopt the method of direct sewage discharge. The method is to install a sewage valve at the bottom of the gas cabinet for replacement. The opening and time of the valve are completely Controlled by the operator, it is easy to cause semi-water gas leakage due to improper operation, resulting in explosion accidents and personal injury accidents, so this method is more dangerous

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