Method for online cleaning structured packing of absorption tower of hydrochloric acid regeneration system
A regenerative system and structured packing technology, applied in cleaning methods and utensils, cleaning methods using liquids, chemical instruments and methods, etc., can solve problems such as high safety risks, long time-consuming, low efficiency, etc., to ensure the absorption effect and improve Flexibility, low cleaning costs
Inactive Publication Date: 2021-06-29
LIUZHOU IRON & STEEL CO LTD
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Problems solved by technology
The dismantling and reinstallation process needs to be manually entered into the tower, which has a high safety risk, takes a long time, and has low efficiency, which will affect the normal production rhythm of the unit to a certain extent
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[0026] Below in conjunction with accompanying drawing, the present invention is described in further detail:
[0027] figure 1 Shown is the structural representation of the hydrochloric acid regeneration system of the present invention, and it comprises the absorption tower 1 that is filled with structured packing, the top of absorption tower 1 is equipped with absorption tower spray device 2, and the bottom of absorption tower 1 is installed manhole cover 3, absorbs The bottom of tower 1 is connected with regeneration acid tank 5 through pipeline one 4, and regeneration acid tank 5 is connected with Venturi scrubber 7 through pipeline two 6, and the top of Venturi scrubber 7 is equipped with Venturi scrubber spray device 8; Wherein , the pipeline two 6 starts from the outlet direction of the regeneration acid tank 5, and the first re-acid pump 9, the first valve 10 and the second valve 11 are connected in series in sequence, and the absorption tower spray device 2 is connecte...
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The invention discloses a method for online cleaning structured packing of an absorption tower of a hydrochloric acid regeneration system. The system comprises the absorption tower, wherein the top of the absorption tower is provided with an absorption tower spraying device, the bottom of the absorption tower is provided with a manhole cover, and is connected with a regenerated acid tank through a first pipeline, the regenerated acid tank is connected with a Venturi scrubbing tower through a second pipeline, and a Venturi scrubbing tower spraying device is installed at the top of the Venturi scrubbing tower; and the second pipeline is sequentially connected with a first re-acidification pump, a first valve and a second valve in series, and the absorption tower spraying device is connected between the first valve and the second valve through a third pipeline. The cleaning method comprises the following steps: opening the first valve, closing the second valve, and starting the first re-acidification pump to continuously pump hydrochloric acid into the absorption tower; and opening the manhole cover, and conducting observation until the color of a cleaning fluid is faint yellow. According to the method for online cleaning the structured packing of the absorption tower of the hydrochloric acid regeneration system, iron powder adsorbed by the packing of the tower is cleaned off with a medium of the existing system without detaching and cleaning the packing of the absorption tower, so that the specific surface area of the packing of the absorption tower is guaranteed, and an absorption effect of the absorption tower is ensured.
Description
technical field [0001] The invention belongs to the technical field of cleaning methods for waste hydrochloric acid regeneration systems in cold rolling mills, in particular to a method for online cleaning of structured packing in absorption towers in hydrochloric acid regeneration systems. Background technique [0002] The waste hydrochloric acid regeneration system in the cold rolling plant uses an absorption tower filled with a certain height of structured packing. The packing uses a piece-type corrugated packing with a specific surface area of 150㎡ / m³ and a corrugation inclination of 45°. The absorption method of hydrochloric acid regeneration process is to spray rinsing water on the upper part of the absorption tower and make countercurrent contact with the flue gas entering from the bottom, and absorb the hydrogen chloride gas in the flue gas to form hydrochloric acid. The structured packing in the tower increases the gas-liquid contact area, fully improves the absor...
Claims
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IPC IPC(8): B08B9/093
CPCB08B9/093B08B3/08
Inventor 张海伟贾朝鲜陆兆刚黄运刚
Owner LIUZHOU IRON & STEEL CO LTD