Dust recycling device for high-tower granulation of compound fertilizer

Abstract

A dust recycling device for high-tower granulation of compound fertilizer comprises a shell and a collection tank. An air outlet is arranged at the upper end of the shell, an exhaust fan is arranged in the air outlet, an air inlet is arranged at the lower end of the shell, a first spraying device, a second spraying device and a third spraying device are sequentially arranged in the shell from bottom to top at intervals, a first filling layer is arranged at the air inlet at the lower end of the shell, a second filling layer is arranged between the first spraying device and the second spraying device, a third filling layer is arranged between the second spraying device and the third spraying device, a fourth spraying device is arranged between the third spraying device and the top surface of an inner cavity of the shell, the collection tank is positioned right below the air inlet and communicated with a circulating tank through a pipeline, the circulating tank is connected with inlets of a first water pipe in the first spraying device and a second water pipe in the second spraying device, and inlets of a third water pipe and a fourth water pipe are connected with a condensing water pipe respectively. The dust recycling device has the advantages of simple structure, convenience in operation and capability of better dissolving and absorbing dust.

Description

technical field [0001] The invention relates to a waste gas treatment device in the production process of compound fertilizer, in particular to a dust recovery device used for high-tower granulation of compound fertilizer. Background technique [0002] High-tower granulation is the key equipment in the production process of compound fertilizer products. It uses natural ventilation to make the molten compound fertilizer solidify, form and cool during the falling process. Therefore, there will be non-negligible compound fertilizer dust in the exhaust gas at the top of the compound fertilizer granulation tower. Most of these dust will fall on the ground within a few kilometers nearby, which will not only corrode objects, but also endanger the growth of crops, causing damage to nearby trees and leaves. This kind of pollution also damages the health of nearby personnel. In recent years, most enterprises have continued to carry out technological transformation for increasing prod...

AI Technical Summary

Problems solved by technology

[0005] (1) Pollution of the surrounding environment: Dust emission has a serious impact on the growth of crops, flowers and trees around the factory area, roads and buildings are corroded, and surrounding residents are also affected, especially in spring and autumn when the air pressure is low and the wind speed is slow , the dust will not be carried away by the wind, it is easy to settle, and it falls and accumulates around the factory building, causing the surrounding environment to be polluted

[0006] (2) Environmental protection emissions are close to the edge of exceeding the standard: At present, the current national environmental protection emission standards for the dust emission concentration of high-tower prilling towers have not yet been officially issued, but they have exceeded the 40m high prilling towers. The absolute emission limit is 40kg / h

[0007] (3) Yield loss: the dust concentration at the top of the granulation tower is high, and the daily output loss is also large

[0008] (4) Unsafe factors caused by dust agglomeration and falling: agglomeration is formed due to dust agglomeration at the top of the tower

This device is also a patent applied by the applicant in 2012, but after actual use, the applicant found that the device cannot completely absorb the dust

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