Process mechanism of low temperature colloid mill system in material pulverization
HAOSTAR In the process of material pulverization, the low-temperature colloid mill system forms a closed-circuit circulation system, which makes full use of energy and saves energy: during grinding and pulverization, the treated materials (solid-liquid mixture) are maintained for a long time under the regulation of cold source temperature. Continuous operation at a low temperature of -20 or 5-25 degrees for 24 hours. According to the characteristic temperature of the material, the temperature can be adjusted during the grinding and pulverizing process of the low temperature colloid mill. The pulverization temperature is selected, the energy consumption is reduced, and the fineness can be pulverized. It reaches 1-50μm, even reaches the micron μ and other fineness. It is different from the low temperature pulverizer by liquid nitrogen cold source and is directly added to the medium for freezing. The advantage of this equipment is that the cold source such as coolant is not in contact with the grinding medium, only as an indirect The cooling medium realizes the comprehensive effect of ultra-low temperature pulverization, material explosion-proof, anti-oxidation and non-polluting materials, and the pulverized material maintains the original state.
Iridium low temperature colloid mill can also be designed according to the special requirements of users, specializing in the grinding of a special colloid grinding unit under low temperature conditions. The material falls to the center of the grinding disc through the blanking tube, and the grinding disc rotating at a constant speed uniformly disperses, grinds and transports the raw material outwardly by means of the centrifugal force to form a state of a certain low temperature for a long time control. The treated material is crushed by a multi-stage grinding tooth of 3-4 such as coarse grinding, fine grinding and fine grinding on a grinding disc, and is pulverized at the same time. Under the continuous driving of centrifugal force, the material continuously circulates in the grinding system and the low temperature system. When the material leaving the grinding disc encounters the material fluid medium entering the mill through the cooling tube and the temperature drops, the middle casing of the mill enters. In the cooling and grinding pipeline, during this process, the material exchanges with the hot gas for a sufficient amount of refrigerant, and the fluid medium is rapidly cooled down to a low temperature. Water-punched cooling mechanical seal device using water-punched water-cooled combined mechanical seal device-patent number CN201020608706.3 Jacket-type cooling water circulation system overcomes the shortcomings of running loss of machine when liquid or idling is lacking, sealing precision High, reducing the friction of the moving and static grinding body, forming a flow field with stable flow pressure, improving the grinding uniformity of the dynamic and static grinding body, making the powder dispersion fineness less than 2UM, enhancing stability and sealing, achieving zero leakage, and When the machine is started, it only needs to turn on the cooling water to the water-cooling mechanical seal device, which has the cooling spindle operating temperature and prolongs the mechanical life.
working principle
The low temperature colloid mill is controlled by intelligent low temperature cooling, which can be sheared, dispersed, emulsified, homogenized, depolymerized, stirred, mixed, crushed and pulverized in a relatively constant temperature condition of 5-25 ° C for a long period of time. The high-speed drive material from the inlet directly from the thruster device through high-shear synchronous grinding into a shear-crushing system, effective crushing, through a multi-stage grinding refining system, a special low-temperature pulverizing unit, some of the fluid Particles, sticky masses, agglomerates and other large and small particles are quickly broken, and then finely pulverized by suction shearing and crushing. In a very narrow working aisle, the frictional grinding and grinding are broken due to the relatively high-speed cutting of the toothed moving disc and the toothed static grinding disc. Wait. Under the action of mechanical motion and centrifugal force, the pulverized and refined material is re-pressed into the refining zone for grinding and crushing. The fine grinding is divided into three to four grades. The more outwardly, the higher the accuracy of the first-stage grinding disc, the smaller the pitch. The longer the line speed, the finer and finer the material, and the fluid gradually curves toward the radial direction. The direction velocity of each fluid changes instantaneously, and is subjected to tens of millions of high-speed shears per minute, strong friction, extrusion grinding, particle pulverization, etc., in tens of millions of high speeds passing through three refining zones. After shearing, grinding and pulverizing, the liquid molecular chain breakage, particle pulverization, liquid particle tearing and the like are produced to fully achieve the purpose of dispersion, pulverization, emulsification, homogenization and refinement. Special low-temperature industrial mining requires that the pulverized material passes through the state of cooling at a low temperature, enters the mechanical pulverizer cavity and rotates relatively high speed through the colloid grinding wheel (stator and rotor), and the material and the blade, the toothed disc, and the repeated impact between the material and the material. Under the combined action of collision, shearing, mixing, stirring, emulsification, homogenization, grinding, pulverization and friction, the ultrafine particles are achieved.
Fully enclosed low-temperature colloid mill in a idling normal operation, machine seal and medium have no contact, so that the mechanical seal has a longer service life, a new generation of idling colloid mill, a low-temperature closed colloid mill, its fully enclosed internal circulation The recirculation system (a number of patents have been obtained), because the whole machine is closed, pipeline or horizontal pipe connection is integrated, thus preventing the surrounding air from entering the grinding system of the reflux colloid mill. The wet material is subjected to multi-function grinding, emulsification, homogenization, pulverization, dispersion, stirring, mixing and the like in a closed digital display controlled low temperature environment, and can be processed under vacuum conditions. It is also equipped with a number of functional devices: fully enclosed containers, cryogenic cooling and compensating devices. The cooling cycle can be used to make the adjustment plate flexible to emulsifie fineness and prevent temperature rise, expansion, and balance the pressure inside the container. The utility model has the advantages of good sealing performance, fireproof explosion-proof, anti-leakage, idling, convenient operation, hygienic and environmental protection, energy saving and high service life, thereby achieving flameproof and flameproof, preventing volatilization of active components of processing materials or stimulating working environment and ensuring The quality of the material is pure. The processed material can be effectively processed in multiple cycles to achieve the desired effect of low temperature original ecology.
Equipment construction
Low-temperature colloid mill is a series of patented products: it has the characteristics of compact design, practical model, beautiful appearance, good sealing, stable performance, convenient operation, simple decoration, durable, wide adaptability and high production efficiency. It is used to process ultrafine particles and fine materials. Very ideal processing equipment.
In addition to the motor and some parts, the low-temperature colloid mill products are made of high-strength stainless steel, especially for the dynamic and static grinding discs. Therefore, it has good corrosion resistance and resistance. Grindability makes the processed materials non-polluting and hygienic. The device can also be customized according to the special requirements of the user.
The main structure of the low colloid mill consists of six main parts: motor, grinding system, cryogenic refrigeration system, transmission base, mechanical seal combination part and control system. Among them, the dynamic grinding disc and the static grinding disc and the cryogenic refrigeration system of the grinding system of the core part of the machine are very important parts of the machine. Therefore, the selection must be different depending on the nature of the material being processed. But the materials are made of stainless steel or special materials. The motor needs special design according to the model. Install a water retaining plate on the flange end of the motor to prevent leakage.
Machine type:
General configuration of experimental models and production models: Low temperature colloid mill and double tank combination, recommended (Intelligent automatic colloid mill unit double unit 2 series)
1. Feeding port cover opening method: the cover can be semi-open, manhole and flange closed;
2, low temperature colloid mill and high shear dispersing emulsifier (gap type) emulsifier to make the material dispersion emulsified and mixed to make sufficient;
3, low temperature colloid mill and through the control valve to make the material circulation pipeline single or multiple cycles
4. The working mechanism of low-temperature colloid mill and mixer stirrer combined with low-speed stirring and high-speed dispersion makes the material dispersion more uniform
5. The low temperature colloid mill and the tank lid of the tank body are divided into single layer or interlayer (can be designed according to specific requirements and processes)
6. Low-temperature colloid mill and emulsifier homogenizer, pipeline grinder (grinding pump) and electronic control cabinet are equipped with automatic equipment.
