37results about How to "High degree of cleanliness" patented technology

The invention relates to a waste pyrolysis system with adjustable oil, gas and carbon and a method. The system comprises a pre-reaction section, a main reactor, a conditioner and a particle separator. The front of the pre-reaction section is connected to a feeder and the tail of the pre-reaction section is connected to the main reactor. The conditioner is connected after the main reactor. The particle separator is connected after the conditioner. In specific, waste having a water content not more than 60% is fed into the pre-reaction section through the feeder, reacted waste is fed to the main reactor, residue coke generated after the reaction is finished is fed into the conditioner and a generated volatile material is discharged in a forced manner into the conditioner to be contacted, reacted and conditioned with the residue coke at the same time. The conditioner achieves conditioning of the residue coke and the volatile material at the same time. The volatile material after being conditioned is fed into the particle separator to output a clean volatile material. The residue coke after conditioning has a calorific value of 3.37-6.74 MJ / kg, and can be used as building raw materials or is conveyed to a sanitary landfill. The working temperature of the pre-reaction section is 105-298 DEG C and an inert gas or flue gas is fed into the pre-reaction section. The working temperature of the main reactor is 450-650 DEG C. The working temperature of the conditioner is 700-900 DEG C. The system and the method can obtain oil with better quality and more combustible gases and are adapt to changes of the water content of the waste.

The invention relates to the technical field of chemical industry and comprehensive utilization of resources, and discloses a vanadium extraction method for sodium vanadium extraction tailings. The method comprises the following steps: (1) adding magnesium oxide powder or magnesium hydroxide fine powder and an optional leaching aid to the sodium vanadium extraction tailings, then adding water, mixing and ball milling to form a homogeneous slurry; (2) The slurry is placed in an autoclave to carry out a hydrothermal reaction; (3) after the reaction is completed, filter to obtain a vanadium-containing solution and a vanadium extraction residue. The invention adopts the whole wet hydrothermal extraction process, does not generate waste gas, has a high degree of cleanliness, and is environmentally friendly; compared with the traditional pyrotechnic process, the method of the invention has low production cost, and the vanadium in the vanadium tailing slag is extracted by sodiumization. The leaching rate can reach up to 69%, and a large amount of vanadium can be recovered, which has good economic and social benefits; the method of the invention is simple and feasible, and the vanadium-containing solution can be concentrated and precipitated after vanadium. % or more flake vanadium.

The invention belongs to the technical field of leather processing and discloses a method for improving the performance of organic chrome-free tanned leather. The invention can effectively improve the color fastness, shrinkage temperature and physical sensory properties of finished leather through the organic synergy of tanning agents, dyeing and finishing materials and processes, and produce high-performance leather. The invention does not use formaldehyde-containing and chromium-containing leather chemical materials in the whole production process. Therefore, compared with the existing leather production technology based on chrome tanning, the present invention can completely eliminate chrome pollution, has a higher degree of cleaning, and is more friendly to the environment; Compared with the traditional leather production method, the leather produced by it does not contain formaldehyde and chromium, and its physical properties are obviously better, so it has higher market application value.