Carrageenan grinder

Product Introduction:
The low-temperature pulverizer uses liquid nitrogen as the cold source, and the crushed materials are cooled to achieve brittleness and easy crushing at low temperatures. After entering the mechanical pulverizer chamber, they rotate at high speed through the impeller, and under the combined effects of repeated impacts, collisions, shearing, and friction between materials and blades, gear rings, and materials, the crushing effect is achieved. The internal chamber of this machine adopts a mesh free type, which can be adjusted to the desired mesh size externally. Liquid nitrogen recovery Recycling. The main characteristics of liquid nitrogen pulverizer are large output, high fineness, and even reaching nanometer requirements.
working principle:
1. The refrigerant exchanges heat with the material to achieve a brittle state. The brittle material undergoes countless impacts, shear, and friction through the crushing structure in the crushing chamber, forming small particles. The fineness of the crushed material can reach the micron level [600-2000 mesh].
2. Refrigerant selection can be based on differences in material properties and properties. If liquid nitrogen is selected as the refrigerant, its low cooling temperature can reach minus 196 degrees Celsius, and the cooling speed is very fast
For certain materials that require rapid cooling and low embrittlement temperatures, liquid nitrogen is the refrigerant. For some materials with low requirements for embrittlement temperature, compressed air or pre cooled air from an air conditioner can be used for heat exchange with the material.

Category:

Product features:
1. The refrigerated liquid nitrogen pulverizer uses a high-performance liquid gas gasification device to exchange heat between the refrigerant and the material during the gasification process. The remaining cold air is collected through a reflux method, and each part uses pipeline valves to adjust the reflux cold air to minimize the air flow in the pulverizer chamber.
2. The pre cooling, closed transportation, closed classification, discharge reflux, refrigerant utilization rate, power source structure, and insulation during the crushing and transportation process of materials have achieved excellent results.

 

Equipment principle:
1. The low-temperature cryogenic crusher uses a pre cooled material bin to pre cool the materials. The pre cooled material bin is equipped with a precision liquid gas gasification device, which forcibly cools the materials during the liquid gas gasification process.
2. Use a spiral feeder to feed materials that have reached cooling embrittlement into the crusher chamber.
3. The independent rolling pair ensures the normal operation of the machine in a low-temperature environment, and the refrigerant injection compensation compensates for the heat generated by the material during the crushing process. The refrigerant injection amount is adjusted through a low-temperature valve; The high-pressure airflow and refrigerant expansion airflow generated during the crushing of materials are discharged from the machine chamber through the vortex of the static classifier of the crusher. After the material is crushed to the required fineness, it enters the discharge system along the same airflow. The coarser material collides with the stationary classifier blades and bounces back into the crushing chamber, achieving the effect of coarse and fine classification.
4. Discharge traction system: Air traction is used to discharge crushed materials from the host through pipelines.
5. Internal airflow classification: ① The material and expansion airflow are fed into the external classifier through an induced draft fan, and the impeller speed of the classifier is adjusted to achieve the required fineness.
② The use of an internal classifier allows users to reduce the time for material return to temperature during screening, reduce labor, shorten production cycles, and reduce usage space. The crushed materials can be directly packaged and transported Customers can choose the internal sieve classification method according to their actual needs; This method is suitable for ultrafine powder classification, achieving perfect results for materials with a mesh size of over 200, while fully utilizing the cold source.
6. Inner sieve classification method: By installing a power sieve in the system, the classification method is the same as the inner airflow classification method. This method is applicable to particle classification on a mesh size of 200.
7. After classification, the coarse material is fed into the feeding mechanism through a pipeline for re crushing, while the fine material enters the cyclone separator. The cyclone separator separates the material from the air, and the material is deposited at the bottom of the cyclone separator through rotation.
8. Reflux booster pump: Generally, the reflux gas in the production process of a machine, that is, most of the cold source, will flow out of the material outlet with the finished product. We used a reflux booster pump to collect the reflux gas, re boost it and input it into the front area of the system. The output power of the booster pump was adjusted to achieve balanced discharge at the discharge port, effectively utilizing the cold source.
9. Reflux gas replenishment and reuse system: Sanitary grade pipelines and valves are used to transport reflux gas. The material is pre cooled by entering the upper vent at the bottom of the pre cooling chamber, and air replenishment is provided to the main engine. Place valves in each functional area for adjustment.
10. Using an inclined angle discharge system for discharge: The inclined spiral discharge system ensures that the air from the cyclone separator does not flow out of the discharge port.
11. The gas-solid mixture containing rare material particles flowing out above the cyclone separator enters the second cyclone separator again, and finally separates. The air flow with a certain cold source function is transported through a pipeline to the feed inlet of the crusher host.
12. Electrical control: Using a fully variable frequency power supply to control the motor speed in each area, achieving a wide range of adjustment for feeding speed. Adjusting the linear speed of the main machine (crushing different materials to achieve different particles requires different linear speeds) and adjusting the airflow traction power; Adjustment of reflux boosting function; Adjusting the discharge speed and other effects.
13. Automatic control system: ① Customers can use PLC to control the balance of various systems as needed, achieving external control of the host’s pressure relief and boosting function, and adjusting the liquid nitrogen flow rate according to the set area temperature. Adjust the input speed according to the current in each zone and memorize the frequency of each zone.
② The memory function can memorize the parameters required for crushing various materials and input them into the computer. Without using external expansion interfaces, it can simultaneously memorize 30 material crushing parameters

 

 

Specifications JK-45 JK-55
production capacity (kg/h) 50-100 100-600
Feed size(mm) ≤50
Discharge particle size (mesh) 40-200 40-300
material SUS 304
Crushing motor(Kw) 5.5 55
Dimensions (length x width x height)mm 1.2×1.0x1.5 2.0×1.8×2.0
weight (kg) 450 2500

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