Pickling pump model, how to choose corrosion-resistant pickling pump?
Pickling pump is a series of fluoroplastic synthetic corrosion-resistant chemical pumps designed according to the requirements of users in the chemical industry. Pickling, that is, the application of an acid solution to remove oxide scale and rust on the surface of steel, is a way to clean the surface of metal. Acids for pickling include sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, chromic acid, hydrofluoric acid and mixed acids. The pickling liquid in the pickling process is generally a mixture of various acids, mainly sulfuric acid, nitric acid and hydrofluoric acid, etc. These mixed acids are very corrosive, and at the same time have strong oxidizing properties and high corrosive medium temperature , Which puts forward high requirements on the corrosion resistance of anti-corrosion materials. The process of stainless steel pickling production line, from production to waste water and waste gas recovery system, has a strong corrosive state in all links, so the choice of anti-corrosion materials is directly related to the equipment.
Iron oxide scale or other impurities are produced during the pickling process, resulting in a certain amount of particles in the pickling solution, with different particle sizes. The pH value of the wastewater generated during pickling treatment is generally below 1.5 (free acid 0.5-2%) It is strongly acidic, which requires the pump to be acid resistant and wear resistant.
It can be seen that there are many different types of acid for pickling, and there are also many corrosion-resistant pumps, such as stainless steel pumps, PP hope material pumps, etc. Although these pumps also have a certain corrosion resistance function, there are individual acid solutions. It will react with these pumps and cause corrosion, making it impossible to use one pump for multiple purposes.
The selection of corrosion-resistant pickling pump should consider the following aspects
1. The selected pump can meet the technical parameters of process requirements)
3, the conveying medium and temperature conditions, determine the material used, if it is a general acid-base liquid, the temperature is not high, use PP material, if it is a strong acid-base medium, or high temperature, use PνDF material (engineering plastic material). Later, it is recommended that you choose the technical parameters that meet the selection and state the conditions of the site
The corrosion-resistant pickling pump produced by Changsha Zhonglian Pump Industry---IHF corrosion-resistant fluoroplastic chemical centrifugal pump (IF centrifugal pump for short) is designed and manufactured in accordance with international standards and combined with the process of non-metallic pumps. The pump body is made of metal shell lined with polyperfluoroethylene propylene (F46). The pump cover, impeller and shaft sleeve are made of metal inserts and fluorine plastics are integrally sintered and pressed. The shaft seal adopts an externally mounted advanced bellows mechanical seal. The static ring is made of 9.9% alumina ceramics (or silicon argon), and the moving ring is filled with tetrafluoroethylene, which has excellent corrosion resistance and resistance to sealing. The inlet of the pump is reinforced with cast steel body to enhance the pressure resistance of the pump. Actual use shows that the pump has corrosion resistance, wear resistance, high temperature resistance, no aging, high mechanical strength, stable operation, advanced and reasonable structure, strict and reliable sealing performance, and convenient disassembly and maintenance.
IHF type corrosion-resistant fluoroplastic chemical centrifugal pump
IHF type fluoroplastic centrifugal pump is characterized by its advanced and reasonable structure, strong corrosion resistance, tight and reliable sealing performance, and stable operation. Low noise and long service life. The temperature of the conveying medium is -85℃~200℃, the flow rate: 1.75-200m3/h, the head: 4.5-87m, the speed is 1450-2900r/min
