Method for manufacturing polyethylene microporous filter tube for secondary filtering of compressed air

Abstract

The invention a method for manufacturing a polyethylene microporous filter tube for secondary filtering of compressed air, which comprises the steps of: A, sieving polyethylene powder with a sieving machine; B, coating silicone oil on the inner wall of an external iron tube mould and the outer wall of an internal iron tube mould for reverse mould sintering and assembling a mould body; C, pouring siftage sieved by the sieving machine between the inner wall of the external iron tube mould and the outer wall of the internal iron tube mould; D, placing the mould body in a constant temperature furnace, sintering for 5-6 hours at 250-300 DEG C; and E, cooling the mould body to room temperature and de-moulding. As a novel filtering medium, the polyethylene microporous filter tube manufactured by novel materials, with novel technology and processes, has high and stable filtering precision, long service life and easy cleaning and is non-toxic, corrosion resisting, temperature resisting at 90 DEG C and can be recycled repeatedly and is an ideal material for various industries to implement high precision gas-solid separation and oil-gas separation. In the manufacturing process, the filter core is only sintered to form at one time, thereby reducing the cumbersome multi-step manufacturing means and saving the labor.

Description

technical field [0001] The invention relates to compressed air precision filtration, in particular to a production method of a polyethylene microporous filter tube for compressed air precision filtration. Background technique [0002] Compressed air is the main source of air for large-scale industrial production. In the compressed air purification system, precision filters are used to filter to achieve the highest level of purification without impurities, oil, water, and odors. It is a solution to reduce costs and improve efficiency. [0003] At present, the filter elements produced in the domestic market are all made of multiple layers of filter materials. The main structure is: the inner and outer metal mesh supports are sandwiched with glass fiber paper outsourcing sponge (seaweed cotton felt). During use, it is easy to cause ( 1) Glass fiber paper swells when it meets water, which affects the pore size, resulting in unstable filtration accuracy and increased pressure dif...

AI Technical Summary

Problems solved by technology

[0003] At present, the filter elements produced in the domestic market are all made of multiple layers of filter materials. The main structure is: the inner and outer metal mesh supports are sandwiched with glass fiber paper outsourcing sponge (seaweed cotton felt). During use, it is easy to cause ( 1) Glass fiber paper swells when it meets water, which affects the pore size, resulting in unstable filtration accuracy and increased pressure difference; (2) The sponge (seaweed cotton felt) wrapped in the outer layer falls off after being rotted, polluting the downstream pipeline; (3) Some In order to reduce the cost, the manufacturer uses iron mesh as the inner and outer support, which will cause rust and produce rusty water, which will affect the purification quality; (4) The filter method of inside and outside is adopted, and the impurities will accumulate and block in the core. It will be replaced and eliminated in time, cannot be used repeatedly, and has a short service life, resulting in waste of resources

[0004] In the manufacturing process, because each layer of filter material is different, the filter element cannot be formed at one time, and it needs multiple processing methods to complete, which increases labor costs