45results about How to "Not easy to raise dust" patented technology

A method for purification and separation of inorganic mineral, especially for purification and separation of montmorillonite from natural bentonite is provided. The said method is simple, and uses high-speed centrifugal device to well solve the problems present in purification of montmorillonite that a-quartz and cristobalite are difficult to be separated and removed and purified slurry is difficult to be concentrated and dehydrated. The purity of montmorillonite thus obtained is not less than 95%.

The invention provides a fur-with-frost dye and a preparation method thereof. The fur-with-frost dye is prepared from the following raw materials in parts by mass: 20-50 parts of acid dye, 10-20 parts of ammonium sulfate, 2-10 parts of fluorescent whitening agent, 2-5 parts of penetrant, 2-5 parts of sodium xylene sulfonate, 10-20 parts of white dextrin and 20-35 parts of anhydrous sodium sulfate; the preparation method of the fur-with-frost dye comprises the following steps: (A) weighing the raw materials and mixing for 1-3 hours to obtain a first powdery mixture; (B) pouring the first mixture into a pelletizer for pelleting to obtain the granular fur-with-frost dye. The dye-uptake of the prepared fur-with-frost dye is increased in the dyeing process, the content of the dye in the waste liquid is effectively reduced and the harm to the environment and the human body is reduced. The dye is prepared into the granular form, and therefore, the dust is greatly reduced and the harm to the using environment and the operating workers is reduced; the prepared fur-with-frost dye has excellent dyeing property and environmental protection performance.

The invention relates to a falling-type pyrolyzer which comprises a feed opening, a uniform blanking mechanism, a preheating section, a main reactor, a blanking auxiliary mechanism and a charcoal discharge section from top to bottom. The waste or biomass, of which the size is less than 30mm and the water content is 35% or below, is sent into the preheating section by the uniform blanking mechanism, and sent to the main reactor by the preheating section. The preheating section is provided with a vapor outlet. The main reactor is composed of vertical plates or membrane-type vertical tube heat transfer surfaces, and the interval is 1.4-3 times of the maximum particle size; by the aid of the blanking auxiliary mechanism, one side is provided with a heat source port, and the other side is provided with a volatile matter filter layer perpendicular to the heat transfer surface and a discharge port. The generated coke falls into the charcoal discharge section, the unpyrolyzed material is pyrolyzed at the charcoal discharge section, and the retention time is controlled through the charcoal discharge speed. When cold charcoal needs to be discharged, the charcoal discharge section is converted into the cooling section, and a coolant passes through at the cold source side. The falling-type pyrolyzer can adapt to the thermal expansion and cold shrinkage, and has the advantages of no leakage, high capacity and space saving.

The invention relates to a matching device of dust removal equipment and discloses a dust removal trolley for a ventilation tank. The dust removal trolley comprises a vehicle body. An inverted L-shaped air inlet bent pipe is arranged in the vehicle body. The air inlet bent pipe comprises an air inlet end and an air outlet end. A partition is arranged in the air outlet end. A plurality of air outlets are formed in the partition. Dust collection bags are arranged in the air outlets. The dust collection bags are detachably connected with the air outlets. Due to the arrangement of the dust collection bags, dust enters the dust collection bags for collection and does not directly fall into the ventilation tank, so that on one hand, dust is not easy to raise and flow out, and on the other hand,even if a small amount of dust is generated, the dust floats in an air inlet pipe and does not diffuse from the vehicle body to the outside of the vehicle body, so that the working environment in factories can be ensured.

The invention relates to a method for preparing a light porous sintering material by red mud and plant residues. The method comprises the following steps: by using the red mud with the water content being less than or equal to 65wt% and the plant residues with the water content being less than 70wt%, preparing and mixing materials; rolling and mixing; moulding; and sintering to obtain the light porous sintering material. The method which utilizes waste red mud and plant residues wide in source and large in output can produce serial products such as water permeable paving products, filtering products, products for sound absorbing materials, catalytic products, light panels or heat-insulating and sound-proofing bricks which are wide in purpose and high in value with low cost. The method has industrial competitiveness and good investment economical benefit. Meanwhile, not only are a lot of clay resources and non-renewable fuel coal as building materials and chemical product raw materials saved to realize industrial emission reduction of Co2, but also the pollution of waste pollutants red mud and plant residues to water, soil and air can be effectively solved, and secondary disasters are prevented.