42results about How to "Prevent re-formation" patented technology

The invention relates to a coke plugging prevention device of a dry quenching furnace. A wind cap composed of a small wind cap and a big wind cap is formed in the dry quenching furnace, the wind cap is connected with an air supplying duct arranged in the cone funnel of the dry quenching furnace, a coke plugging prevention device in the dry quenching furnace is arranged at the periphery of the wind cap and comprises blanking crushing bodies, a blanking crushing bracket and unchoking lock chains; the blanking crushing bracket is arranged between the cone funnel of the dry quenching furnace and the air supplying duct, a plurality of blanking crushing bodies are fixed on the blanking crushing bracket, and a plurality of unchoking lock chains overhang below the blanking crushing bracket. The coke plugging prevention device of the dry quenching furnace has the advantages that the compact structure of the coke layer can be broken through the self gravity of the coke layer and the blanking crushing bodies after the coke layer with compact structure contacts the device in the dry quenching furnace, and the unchoking lock chains are used for preventing the coke layer from forming the compact structure again, so that the material can be discharged smoothly, and the harmful effect to the operation control and environment protection emission of the dry quenching furnace main body and the dry quenching furnace system due to the coke collapse phenomenon can be effectively prevented.

The invention relates to a method for controlling air pollution. In heavily polluted industrial areas, aircrafts are used to spray purification materials with high pressure. After spraying for a period of time, air pollutants are adsorbed or degraded, and air quality is improved; the purification materials are composed of Biomass microspheres formed by colloidal biomass material loaded with a catalyst, the colloidal biomass is gelatinized from starch and plant fibers; the catalyst is a doped titanium dioxide-silica gel catalyst. The purification material is mainly a biomass material, has low cost, is green and environmentally friendly, and will not cause secondary pollution when used. The preparation method of the invention can be operated continuously, is easy to implement and control, and is beneficial to industrialized production.

The invention relates to a surface three-step nitridation method of aluminium and aluminium alloy, comprising the following steps: 1, removing surface oxide-films; 2, conducting surface nitridation treatment, wherein the step 1 successively comprises: pretreating, conducting a first zinc immersion, washing, removing zinc, conducting a secondary zinc immersion, and washing and drying; and the step 2 successively comprises: discharging oxygen, heating up to let the furnace temperature be 300 DEG C, and controlling the ammonia dissociation rate below 10%; heating up to 560-590 DEG C for the first time; nitriding for the first time at the furnace temperature of 560-590 DEG C; heating up to 620-640 DEG C for the second time; conducting secondary nitriding at the furnace temperature of 620-640 DEG C; cooling to let the furnace temperature be 570-600 DEG C; nitriding for the third times at the furnace temperature of 570-600 DEG C; and denitriding at the furnace temperature of 570-600 DEG C. According to the invention, the surface dense oxide-films of aluminium and aluminium alloy can be effectively removed, the infiltration of nitrogen atoms is benefited, and nitridation treatment can be conducted by using a common gas nitriding furnace, thus the production cost is low, the operation is simple, the adaptability is wide, and the infiltrated layer has good quality.

The invention discloses a multi-mechanism combined belt sticky material removal device, which is installed under the return belt at the unloading roller, includes a roller brush, a consolidation layer peeling device and an air knife cutting device, and is arranged along the direction of the return belt The roller brush, the consolidated layer peeling device and the air blade cutting device are arranged in sequence from near to far relative to the discharge roller; The axes are parallel to each other. One end of the stripping whip is fixedly installed on the stripping roller, and the other end is driven by the rotary motion of the stripping roller to strike the surface of the return belt. The multi-mechanism combined type belt sticky removal device of the present invention has the advantages of being simple and practical, highly efficient cleaning and capable of preventing belt sticky material, and the like.