System for conducting dust removal on tail smoke generated when spraying granulation is conducted on chemical fertilizer

Abstract

The invention discloses a system for conducting dust removal on tail smoke generated when spraying granulation is conducted on chemical fertilizer. The system comprises a cyclone dust remover, a heat exchanger, a water curtain dust remover and a first recycling pipeline, wherein the cyclone dust remover is provided with an inlet for receiving the tail smoke containing the dust and an outlet for discharging the primary net smoke generated after cyclone dust removal is conducted; the heat exchanger is provided with a liquid raw material inlet, a primarily-cleaned smoke inlet, a liquid raw material outlet and a primarily-cleaned smoke outlet of the heat exchanger; the water curtain dust remover is arranged at the downstream portion of the cyclone dust remover, a smoke inlet of the water curtain dust remover is communicated with the primarily-cleaned smoke outlet of the heat exchanger, a cleaning solution inlet of the water curtain dust remover is communicated with the liquid raw material outlet of the heat exchanger, and a water curtain is formed through liquid raw materials; the first recycling pipeline is communicated with a dust removal waste liquid outlet of the water curtain dust remover, receives the liquid raw materials generated after the raw materials are used for conducting dust removal through the water curtain dust remover and returns the liquid raw materials to a stirring pool and mixes the liquid raw materials with solid raw materials. According to the system, the tail smoke waste heat is fully utilized, dust particles in the tail smoke are recycled, the dust removal efficiency is high, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of fertilizer production, in particular to a system for removing dust from tail smoke generated when chemical fertilizers are sprayed and granulated. Background technique [0002] In the process of fertilizer production, after mixing the liquid raw materials and solid raw materials in the mixing tank, the slurry formed is sprayed out through the spray granulator, and then dried and granulated by hot air instantaneously. Containing fertilizers with small particle size, direct discharge into the air will seriously pollute the environment and cause waste of resources. [0003] In the existing fertilizer production process, the tail gas is generally firstly dedusted by gravity, and then directly discharged into the air after being dedusted by a cyclone. Gravity dedusting relies on the action of gravity, using the density difference between particles and gas to make them move relative to each other and settle. ...

AI Technical Summary

Problems solved by technology

[0006] The existing dust removal system has the disadvantages of low dust removal efficiency, insufficient use of tail smoke waste heat and insufficient recovery of dust particles, and secondary pollution during the dust removal process.

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