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Recently, Shijiazhuang Zhenhua Enamel Repair Co.
, Ltd.
adopted self-developed spraying polytetrafluoroethylene (PTFE) technology to repair the partial damage of the glass-lined equipment of a chemical company in Inner Mongolia, and solved the problem of PTFE materials and glass-lined equipment for many years.
The problem of difficult adhesion
.
On-site partial repair of glass-lined equipment has always been a difficult point in the industry
.
According to Sun Liren, general manager of the company, it is difficult to find a suitable repair agent under the working conditions where the reaction medium is strong acid and alkali and solvent
"For many years, we have been studying the use of polytetrafluoroethylene emulsion as a sealing agent for ceramic spray coatings to solve the problem of equipment damage
.
In 1995, this technology was used to repair a reactor with chlorinated paraffin as the reaction medium in a chemical plant in Hengshui.
Glass-lined equipment is the main production equipment in the fields of pharmacy, pesticides, dyeing, etc.
The reaction medium in the equipment is highly corrosive, and the temperature in the equipment changes greatly during the reaction
.
This requires glass-lined equipment to have good mechanical properties and chemical stability, as well as corrosion resistance, high and low temperature resistance
"Because PTFE has excellent chemical stability, it can resist all strong acids, strong alkalis, strong oxidants, and strong solvents within 200°C.
Therefore, the use of PTFE to repair glass-lined equipment is the best material
.
However, PTFE has a high plasticization temperature and does not adhere to various materials
