Mechanical filler cleaning method and mechanical filler cleaning device

Abstract

The invention relates to a mechanical filler cleaning method and a kind of chemical equipment namely a mechanical filler cleaning method and a mechanical filler cleaning device. The mechanical filler cleaning method comprises the following steps of: flushing the bulk filler with a circulating desulfuration mixed liquid in a desulfuration liquid groove; cleaning the filler again with the desulfurated regenerated supplementary desulfuration clear liquid; conveying the desulfuration mixed liquid containing a great amount of flushed sulfur foams back for desulfuration and regeneration; and recycling the sulfur foams in the desulfuration mixed liquid. The device comprises a desulfuration liquid groove; a filler conveyor is arranged in the desulfuration liquid groove; multiple flushing pipes are arranged above the tail part of the filler conveyor; multiple nozzles are arranged on each flushing pipe; and a slide sieve is mounted at a filler outlet of the filler conveyor. The bulk filler is flushed with a desulfurated desulfuration liquid instead of water, without generating sewage, polluting river, polluting environment, polluting or influencing the quality of circular cooling water of asynthesis ammonia plant, or influencing the normal production of synthesis ammonia; and the device has the characteristics of good cleaning effect and thorough filler cleaning without dead space, and is easy to manage.

Description

technical field [0001] The invention relates to a method for mechanically cleaning packing and a chemical equipment, namely a method for cleaning packing and a device for mechanically cleaning packing. Background technique [0002] In the prior art, most factories producing synthetic ammonia and methanol have atmospheric desulfurization towers or pressurized desulfurization towers, pressurized shift gas desulfurization towers, and most of them are plastic bulk packing towers, and the surface of bulk packing is easy Adhesion of sulfur foam and crystals will block the tower in serious cases, increase the resistance of the desulfurization tower, reduce the circulation of desulfurization liquid, and reduce the desulfurization effect. The hydrogen sulfide at the outlet of the desulfurization tower exceeds the standard. Park the car, scrape out the bulk packing and wash it manually. The bulk packing of the desulfurization tower of a synthetic ammonia plant with an annual output o...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, most factories producing synthetic ammonia and methanol have atmospheric desulfurization towers or pressurized desulfurization towers, pressurized shift gas desulfurization towers, and most of them are plastic bulk packing towers, and the surface of bulk packing is easy Adhesion of sulfur foam and crystals will block the tower in serious cases, increase the resistance of the desulfurization tower, reduce the circulation of desulfurization liquid, and reduce the desulfurization effect. The hydrogen sulfide at the outlet of the desulfurization tower exceeds the standard. Park the car, pick up the bulk filler and wash it manually

The bulk packing of the desulfurization tower of a synthetic ammonia plant with an annual output of 200,000 tons of ammonia is 400 meters 3 Above, the volume of the filler is very large, and it needs to take up a lot of space to manually wash the filler. It is difficult to find such a large space near the desulfurization tower.

Manual flushing of packing requires a large amount of flushing water, which will wash away and take away impurities such as sulfur foam and crystals and alkaline soda ash solution adhering to the packing and between the packings. The ground is full of A large amount of sulfur foam, alkaline sewage similar to yellow mud, and the working environment for manual flushing of fillers are very poor. The lye directly contacts the skin, which is relatively harmful to people. However, these large amounts of flushing water are difficult to store and even more difficult to handle.

If the flushing water enters the circulating cooling water system of the synthetic ammonia plant, it will corrode the heat exchange equipment and pipes, and the sulfur foam in the water will adhere to the surface of the heat exchange pipes and the inner wall of the pipes, affecting the heat exchange of a large number of heat exchangers, or even clogging Heat exchangers and blocked pipes will affect the continuous production of synthetic ammonia, which will cause serious troubles; if the flushing water is drained or accidentally flowed into the river, it will seriously pollute the river water and be difficult to clean up, causing river water pollution accidents

The whole plant is parked to remove the desulfurization tower packing and flushing, which is often a forced temporary parking, requiring a short parking time, but the flushing packing is affected by the size of the flushing site, the source of the flushing water, the size of the working surface, the collection of sewage, and the storage capacity of sewage. Due to the limitation of the filling, the filling is not flushed thoroughly, the flushing speed is slow, the whole plant stops for a long time, and the economic loss of parking is great.

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