4results about How to "Prevent crusting" patented technology

The utility model relates to the field of flue gas sampling and filtering, in particular to an automatic anti-blocking and anti-skinning multi-stage filtering high-temperature flue gas sampling device which comprises a scraper cylinder and a rotation driving mechanism used for driving the scraper cylinder to rotate, at least one scraper is arranged on the inner edge of the scraper cylinder, the inner edge of the scraper is attached to the outer edge of a secondary filter, and the outer edge of the secondary filter is attached to the scraper cylinder. According to the automatic anti-blocking and anti-skinning multi-stage filtering high-temperature flue gas sampling device, the surface of a secondary filtering device is prevented from being blocked and skinned by utilizing the continuous rotation of a scraper sleeve, and high-pressure and high-speed blowback gas is matched for blowing, so that automatic cleaning is realized, and the service life of a filter is prolonged; and multi-stage filtration is adopted, a matched analysis instrument is protected, and the service life is prolonged.

This utility model discloses a pure water tank for industrial sulfuric acid production and processing, including a pure water tank, multiple dilution tanks, and multiple pipelines. Each pure water tank is individually connected to each dilution tank via a pipeline. Each pipeline is equipped with a flow meter and a first switching valve. An inlet is located at the top of the pure water tank. Sulfuric acid concentration meters are installed on the dilution tanks. This utility model relates to the technical field of pure water tank equipment. This pure water tank for industrial sulfuric acid production and processing, by installing backwashing mechanisms on each water supply pipeline, can periodically flush the water supply pipelines (including the pure water tank), thereby flushing away trace amounts of acidic vapor that have invaded the inner wall of the pipeline, preventing corrosion of the pipeline inner wall and avoiding the problem of scaling. Furthermore, the wastewater after flushing is safely treated before being discharged, without polluting the environment.

The invention relates to the technical field of probiotic embedding production equipment, and discloses embedding type probiotic production equipment which comprises a tank body, a feeding pipe, a servo motor and a mixing unit. According to the embedded probiotic production equipment, a large-area and low-linear-speed stirring mode which is attached to the tank wall is adopted, materials are driven to perform gentle macroscopic circulation, meanwhile, an arc-shaped belt on the embedded probiotic production equipment generates mild radial guiding force to push the materials to the center, and the longitudinal mixing assembly utilizes forward and reverse spiral belts in opposite directions to mix the materials with the materials. Complex up-and-down convection with extremely low shearing force is manufactured in the central area of the tank body, a mixing dead zone is efficiently eliminated, global three-dimensional uniform mixing under low rotating speed and low energy input is realized, full dispersion and contact of probiotics and wall materials are ensured, the activity of thalli and a preliminarily formed emulsification structure are protected to the greatest extent, and the production efficiency is improved. The embedding efficiency and the product stability are improved.

The present application relates to the technical field of castable preparation, and particularly relates to a preparation method of anti-skinning high-temperature-resistant castable, which comprises the following steps: S1, taking 50-60 parts of mullite, 20-25 parts of corundum micropowder, 3-8 parts of calcium aluminate cement, 1-3 parts of water reducing agent, 2-5 parts of silicon micropowder and 8-10 parts of modified carbon fiber as raw materials according to weight fraction; S2, pretreating the corundum micropowder; S3, loading the modified carbon fiber onto the surface of the pretreated corundum micropowder; S4, adding the mullite, water reducing agent, silicon micropowder, calcium aluminate water and corundum micropowder loaded with modified carbon fiber into a stirrer, and adding water, and obtaining the castable after stirring. The present application makes the modified carbon fiber orderly loaded on the corundum micropowder by pretreating the corundum micropowder, ensures the good combination of the corundum micropowder and the mullite, improves the toughness and thermal stability of the castable, and prevents the phenomena of skinning and falling off during the use of the castable.