47results about How to "Avoid or reduce pollution" patented technology

The present invention discloses one kind of cigarette filter tip with natural protein fiber silk as the main filter material, which is coated and high temperature and high humidity steam treated to get certain hardness, elasticity and moisture absorbing capacity. Test shows that the cigarette filter tip can block and filter out harmful cigarette smoke matter. The cigarette filter tip made of natural long protein fiber has no toxicity, no inhalation hazard, no environmental pollution, simple preparation process, low cost and wide market foreground.

The invention discloses a wastewater reuse method combining magnetic loading coagulation clarification and membrane separation. The method comprises the following steps: (1) a coagulant is added into a reaction tank to form small flocs; (2) the small flocs enter a loading and mixing tank to generate magnetic coagulation cores with magnetic carriers; (3) after the magnetic coagulation cores enter a flocculation tank, a flocculant is added to generate large-particle magnetic floccules; (4) after the magnetic floccules are stirred and dispersed strongly by a high-speed dispersion machine, magnetic carriers which are recycled via a magnetic drum separator return to the step (2), supernatant liquor enters a middle water tank via the collection by a water collecting pipe, after being pressurized by a water pump, the supernatant liquor enters membrane separating equipment for fine filtration, and filtered water is discharged for reusing. The method is used for removing particulate matters, colloid and a part of dissolved organic matters in advance before membrane filtration, so that membrane pollution degrees can be effectively avoided or reduced, and the cleaning period and the service life of membrane components are increased. The method can be used for the resource reutilization of the wastewater in industries of printing and dyeing, electroplating, paper-making and the like, as well as the upgrading and reconstruction and the tail water reuse of sewage treatment plants.

Building parts in the moist / wet region of cooling towers prepared from synthetic plastics to which are added additives in suitable amount to prevent subsequent growth of microorganisms.

A bimetal spiral steel pipe comprising a pipe body (100), the surface of the pipe body (100) extending outwards to form a rib (102) which is spirally arranged around the outer wall of the pipe body. A groove (103) and an auxiliary inner steel band (200) capable of covering the notch of the groove are provided on the rib (102) and the surface of the pipe body (100). A hollow cavity (300) is formed between the groove (103) and the auxiliary inner steel band (200), and is filled with concrete (400). Also disclosed is a manufacturing method for a bimetal spiral steel pipe. By means of the bimetal spiral steel pipe and the manufacturing method therefor, the rib on the outer wall of the pipe body and the pipe body are integrally formed, and can resist the dynamic load fatigue when bearing dynamic load; the corrosion resistance and wear resistance of the steel pipe are enhanced; further, the thickness of the steel pipe main body is reduced, and material costs are reduced.