Environmentally-friendly and energy-saving circulation system for compound fertilizer production line

Abstract

The invention relates to an environmentally-friendly and energy-saving circulation system for a compound fertilizer production line. The circulation system comprises a bag-type dust collector, a gravitational dust collection chamber, a hot air washing tower, a cold air washing tower, a sewage tank and a filter press; the bag-type dust collector is connected through a first negative pressure air pipe and collects dust generated in the corresponding processes; the gravitational dust collection chamber is connected through a second negative pressure air pipe and collects dust generated in the drying and cooling processes on the compound fertilizer production line, is further connected to the hot air washing tower through a hot air negative pressure pipe and is further connected to the cold air washing tower through a cold air negative pressure pipe; the hot air washing tower and the cold air washing tower are connected to the sewage tank through first water pipes; and the sewage tank is connected to the filter press through a second water pipe. The circulation system has the beneficial effects that the dust generated in the compound fertilizer production line is collected and recycled, and therefore the pollution to the environment is reduced, meanwhile, energy is saved, and finally the purposes of environmental protection and energy conservation are achieved.

Description

technical field [0001] The invention relates to the field of compound fertilizer production, in particular to an environment-friendly and energy-saving circulation system used in a compound fertilizer production line. Background technique [0002] Such as figure 1 As shown, the process flow of the traditional compound fertilizer production line is as follows: the solid phase materials after being measured, mixed and crushed by the batching station are transported to the drum granulator. After the concentrated sulfuric acid and water are diluted to a certain mass fraction in proportion, they are sprayed into the granulation material bed through the flowmeter, and the liquid ammonia is metered through the flowmeter, and enters the reactor buried in the material bed for neutralization reaction with dilute sulfuric acid to form Ammonium sulfate slurry with higher temperature. The powdery material is mixed with ammonium sulfate slurry to form a solid solution of a certain liqui...

AI Technical Summary

Problems solved by technology

[0003] Dust will be generated in many processes in the above-mentioned compound fertilizer production line. So far, this type of dust has not been recycled, resulting in the pollution of the surrounding environment and the loss of raw materials.

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