Method for washing carbonization tower water tank by utilizing cleaning gas

Abstract

The invention relates to a method for washing a carbonization tower water tank by utilizing cleaning gas. The method comprises the following steps of: closing a water inlet pipeline valve and a water returning pipeline valve, opening a drain valve to let the cooling water in the water tank out through the drain valve; when the water storage in the water tank reaches 30% to 35% of that of the water tank full of water, using the original gas discharging pipe as a cleaning gas inlet pipe for the cleaning gas of the washing tank, and enabling the cleaning gas to enter from the water tank at the top side to wash the water tank; closing a cleaning gas inlet valve to stop inletting the gas after no water is contained in an air-water mixture exhausted from a sewage drainage exit, opening a cooling water return pipeline valve to add carbonized cooling water return into the carbonization tower water tank again and repeat the washing; and when the amount of biological slime in the cooling water exhausted from the bottom of the carbonization tower water tank is close to that in normal cooling water return, closing the gas inlet valve to complete the washing of the carbonization tower water tank. Compared with the prior art, the washing method provided by the invention realizes direct washing under the operational state, produces no pollution to the environment and no corrosion to equipment, shortens the washing time within 40 minutes, is labor-saving and easy and simple to operate, and has good cleaning effect.

Description

[0001] Technical field: [0002] The invention relates to a method for flushing a water tank of a carbonization tower, in particular to a method for flushing the water tank of a carbonization tower with cleaning gas. Background technique: [0003] The core equipment in the soda making industry - the carbonization tower, the heat of reaction is removed through 7 to 8 internal cooling water tanks installed at the lower part of the tower. 312 titanium tubes are installed in each water tank, the reactants in the tower --- lye (mainly composed of sodium bicarbonate and ammonium chloride) go outside the tubes, and the cooling water goes inside the tubes, and the heat of the reactants passes through the cooling water through indirect heat exchange Take away, the reactant lye is cooled. The cooling effect in the carbonization reaction is very large. If there is no cooling, the reaction will stop immediately; without good cooling, the reaction conversion rate will be greatly reduced...

AI Technical Summary

Problems solved by technology

[0004] The water tank of the carbonization tower has been used for a long time, and impurities in the water are easy to adhere to the water side in the pipe, mainly including fine particles of sediment, dust, insoluble salts, etc. These attachments cannot be self-cleaned by normal water flow, which greatly affects the normal operation of production

In order to remove the biological slime in the pipe, the company has been using regular pickling and forced cleaning with hot sodium carbonate solution circulation, but the original method is highly corrosive to the equipment and consumes a lot of manpower and material resources. The most important thing is that the cleaning time is long, and each time it takes 5 Up to 6 hours, the shutdown of the tower for cleaning has a great impact on production

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