Paraffin granulation underwater production method

Abstract

The invention relates to a production method for paraffin wax underwater granulation, which comprises the following steps: liquid wax is sprayed out of the lower part of a granulator through nozzles of a switch board and a heated board, solidified into solid wax in demineralized water, subjected to spraying, draining and air drying, and then solidified into finished products; hot demineralized water is respectively driven into the switch board and the heated board of the granulator, and the temperature is controlled; the demineralized water is returned to a circulating tank through the granulator and a filter tank, sprayed downwards above a cooling chute as second spray water through heat exchange, partially overflows into the filter tank through a draining sieve and a cold water buffer tank and returned to the circulating tank, and partially serves as first spray water through the cold water buffer tank; the water coming from a refrigerator is returned for circulation after heat exchange with circulating water through a heat exchanger; hot air supplied by an air blower respectively enters the front half part and the rear half part of air dryer, waste air is discharged outdoor from the top of the air dryer through an induced draft fan, granular wax is regular spherical particle with the grain size of 3-5mm, pelletization qualification rate is more than 95 percent, and energy consumption of the system operation is lower than that of the existing water cooling steel belt granulation technology.

Description

technical field [0001] The invention relates to an underwater granulation production method of paraffin wax by the granule wax molding technology. Background technique [0002] At present, the paraffin molding methods in my country are mainly block wax molding technology in the 1970s and granular wax molding technology in the mid-1980s. [0003] Compared with granular wax, block wax has the following disadvantages when it is formed and used: 1) The block wax is formed by air closed-circuit cooling (using ammonia as the refrigerant for refrigeration), with low heat transfer coefficient, large energy consumption, high operating cost and long cycle . 2) The cold room of the block wax molding machine is huge, and it adopts multi-layer chain transmission, which requires high precision in mechanical manufacturing and strict tension adjustment. Maintenance costs are high. 3) Users who use a small amount need to break the wax block, which is extremely inconvenient to use. [000...

AI Technical Summary

Problems solved by technology

[0003] Compared with granular wax, block wax has the following disadvantages when it is formed and used: 1) The block wax is formed by air closed-circuit cooling (using ammonia as the refrigerant for refrigeration), with low heat transfer coefficient, large energy consumption, high operating cost and long cycle

2) The cold room of the block wax molding machine is huge, and it adopts multi-layer chain transmission, which requires high precision in mechanical manufacturing and strict tension adjustment. high maintenance costs

3) Users who use a small amount need to break the wax block, which is extremely inconvenient to use

During the long-term operation of this process, due to the decrease of the surface smoothness of the running steel belt, the wax particles and the steel belt often stick together, and the wax particles stick to each other.

Since the liquid wax conducts heat indirectly with one side of the steel belt, and the thermal conductivity of paraffin wax is low, the heat transfer efficiency is low, and the length of the steel belt is required to be large, which directly results in a large equipment footprint.

In addition, the water-cooled steel belt granulation technology still has the disadvantages of small processing capacity, low granulation efficiency, unsatisfactory product quality, many mechanical moving parts of the equipment, and many hidden dangers of failure.

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