With today's chemical industry playing an increasingly important role in the national economy, chemical pumps as a key business in the chemical industry has also been concerned about the supporting equipment. In the chemical industry in this special and complex environment, how to choose chemical pump users do? Chemical pump selection should focus on what aspects? Now combined with experience on chemical pump selection to do a brief review, hoping to benefit my colleagues in this field to better work. Chemical pump selection precautions All along, corrosion is one of the most troublesome hazards of chemical equipment, a slight carelessness, ranging from damage to equipment, heavy cause accidents and even lead to disaster. According to the statistics, about 60% of the destruction of chemical equipment is caused by corrosion. Therefore, the selection of chemical pumps should first pay attention to the scientific material selection. There is often a misunderstanding that stainless steel is a "universal material," no matter what the media and environmental conditions are held out of stainless steel, which is very dangerous. The following for some common chemical media to talk about the selection of the main points: 1, ammonia (ammonia hydroxide) most of the metal and non-metallic liquid ammonia and ammonia (ammonia hydroxide) corrosion is slight, only copper and copper alloy should not be used . 2, salt water (sea water) Ordinary steel in sodium chloride solution and seawater, salt water corrosion rate is not too high, the general need to use paint protection; various types of stainless steel also have a low uniform corrosion rate, but may be due to chloride ions caused by the local Corrosion, usually 316 stainless steel is better. 3, alcohols, ketones, esters, ethers Common alcohol mediums are methanol, ethanol, ethylene glycol, propanol, ketones have acetone, butanone and so on, the ester medium has a variety of methyl esters, Ethyl ether, ethers medium ether, ether, butyl ether, they are basically non-corrosive, common materials are applicable, the specific selection should also be based on the media properties and related requirements to make a reasonable choice. 4, sulfuric acid as one of the strong corrosive medium, sulfuric acid is an important industrial raw materials for a very wide range of uses, most of the hydrochloric acid solution metal materials are not resistant to hydrochloric acid corrosion, nitric acid, most of the general metal is rapidly corrosive damage in nitric acid, acetic acid it is organic acid One of the most corrosive substances, alkali (sodium hydroxide) steel is widely used below 80 ℃, 30% concentration of sodium hydroxide solution and other strong acid and alkali environment requires special attention to chemical pump material selection. The choice of each product for the future product use and work can have a tremendous impact, so the product selection, the user should do their homework and knowledge preparation. For chemical pump this special pump equipment, because of its special place of work, in the selection of such products not only to consider the work environment while also concerned about equipment safety and so on.
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