Cleaning agent, cleaning liquid and cleaning method for stainless steel equipment

Abstract

The invention relates to a stainless steel equipment cleaning agent. The stainless steel equipment cleaning agent comprises the following effective components in parts by weight: 5-8 parts of polyglycolic acid, 7-10 parts of biochemical fulvic acid and 2-5 parts of amino acetic acid, wherein water is added for complementing into 100 parts, so that a cleaning solution can be prepared. A method for cleaning stainless steel equipment by utilizing the cleaning agent comprises the following steps: (1) preparing raw materials: weighing the following components in parts by weight: 5-8 parts of polyglycolic acid, 7-10 parts of biochemical fulvic acid, 2-5 parts of amino acetic acid and balance of water, wherein the total parts by weight of polyglycolic acid, biochemical fulvic acid, amino acetic acid and water is 100 parts; (2) taking two thirds of water and heating to 50 minus or plus 5 DEG C, adding amino acetic acid and uniformly stirring, adding biochemical fulvic acid, and stirring for dissolution, so that a solution A is obtained; (3) taking the rest of water, adding polyglycolic acid, and stirring for dissolution, so that a solution B is obtained; (4) introducing the solution A into equipment to be cleaned and circulating for 5-10 minutes, and then introducing the solution B and carrying out circulation cleaning. The stainless steel equipment cleaning agent has few components, is environment-friendly and produces less corrosion to the equipment, and descaling rate is more than 98%.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to an environment-friendly cleaning agent for stainless steel equipment. Background technique [0002] The material of stainless steel heat exchange equipment is generally made of 304 and 316 stainless steel materials. It is responsible for the exchange of cold and heat and the transfer of energy. It is an important equipment for chemical production enterprises and many units in winter. Due to the water quality, after a long-term use of the stainless steel heat exchanger, the inner wall of the heat exchange tube or the heat exchange plate will produce dirt such as rust sludge, fungal sludge and rust scale. The generation of these dirt will cause corrosion and blockage of the tube wall or plate wall of the stainless steel heat exchanger, resulting in poor heat transfer performance of the heat exchanger, reduced heat transfer efficiency and less than the rated he...

AI Technical Summary

Problems solved by technology

Although the mechanical dredging method is low in cost, it needs to dismantle the equipment, which is not only labor-intensive, labor-intensive and time-consuming, but also easily damages the equipment

However, the traditional chemical cleaning method using weak organic acids such as oxalic acid or citric acid combined with strong inorganic acids will generate calcium and magnesium precipitates of organic acids during the cleaning process, which will affect the cleaning speed.

At the same time, the wastewater after cleaning cannot be degraded by itself, so it cannot be discharged directly, and the treatment process of cleaning wastewater is very complicated and costly

More importantly, this traditional chemical cleaning method cannot completely remove the dirt in the internal circulation water channel of the stainless steel heat exchange equipment with complex structure

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