System and process for large-grain crystallization of ammonium sulfate

Abstract

The invention discloses a system and a process for large-grain crystallization of ammonium sulfate. The system comprises a crystallization tank, a recycling tank and an accommodation tank and further comprises a reflux pipeline, a master control panel, a first temperature sensor and a second temperature sensor, wherein one end of the reflux pipeline is communicated with the upper end of the recycling tank, and the other end of the reflux pipeline is connected with the upper end of the crystallization tank through a pump body; the first temperature sensor is mounted at the end, connected with the crystallization tank, of the pump body; a first display screen is mounted on the pump body; the first display screen, the first temperature sensor and the master control panel are in signaling connection; the master control panel is mounted on the crystallization tank; a master control chip, a heater and a relay are mounted on the master control panel, and the relay and the heater are both welded to the pin end of the master control chip; the master control chip is in signaling connection with the first display screen and the first temperature sensor. Intelligent temperature control can be realized, the temperature can be controlled accurately, secondary circulation operation can be performed, and the utilization rate is greatly increased.

Description

technical field [0001] The invention relates to the technical field of ammonia desulfurization, in particular to a system and process for crystallizing large particles of ammonium sulfate. Background technique [0002] In the traditional ammonia desulfurization process, the ammonium sulfate extraction particle crystals are relatively small, and the particles do not have enough time to grow, forming powdery or fine particle crystals, and the secondary value of the product is low. [0003] The advantages of large granular ammonium sulfate: high purity, convenient storage and transportation, long-term fertilizer effect, and easy to make controlled-release fertilizer. Domestically produced ammonium sulfate is basically powder or micropowder with a particle size of less than 1mm. The disadvantage of small particles is that the specific surface area of ​​the grain is large, and more acid water will be absorbed in the pipeline, causing corrosion of the pipeline, and it also contain...

AI Technical Summary

Problems solved by technology

Domestically produced ammonium sulfate is basically powder or micropowder with a particle size of less than 1mm. The disadvantage of small particles is that the specific surface area of ​​the grain is large, and more acid water will be absorbed in the pipeline, causing corrosion of the pipeline, and it also contains more impurities. ;It will increase the apparent viscosity of the crystalline slurry, resulting in difficulty in feeding and serious equipment wear; it is easy to absorb moisture and agglomerate, which affects the effect of spreading; it dissolves quickly and the fertilizer effect time is short

This method does not have a good grasp of the temperature, and the entire crystallization process requires very precise temperature, otherwise the crystallization cannot form the predetermined particle size, and it cannot be used for secondary use, and the cycle rate is low

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