Dedusting system used for urea prilling tower and provided with air inducing devices at sidewall of tower top

Abstract

The invention provides a dedusting system used for a urea prilling tower and provided with air inducing devices at the sidewall of a tower top. The dedusting system comprises sidewall induced draft fans, a cleaning chamber, a filtering assembly mounting part shell and a main tower body, wherein the sidewall induced draft fans are arranged on the sidewall of the cleaning chamber; the sidewall induced draft fans are only arranged along the sidewall of the cleaning chamber of the urea prilling tower; the sidewall, provided with the sidewall induced draft fans, of the cleaning chamber is in coaxial arrangement with the filtering assembly mounting part shell; the diameter of the peripheral edge of the sidewall is larger than the diameter of the filtering assembly mounting part shell; and the vertical projection positions of the sidewall induced draft fans are all located out of the vertical projection of the filtering assembly mounting part shell. According to the invention, since a plurality of the sidewall induced draft fans are adopted for distributed air induction, the influence of overall fan load on the tower body is reduced; and the induced draft fans are mounted at positions away from a filtering assembly, so the daily maintenance of the filtering assembly is facilitated, the filtering assembly can be conveniently and directly replaced, shutdown maintenance time is further shortened, and the production efficiency of the urea prilling tower is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of industrial dust removal, and in particular relates to a dust removal system for a urea granulation tower with an air induction device installed on the top and side walls of the tower, which is suitable for the recovery of urea dust in the urea granulation tower. Background technique [0002] The urea granulation process will emit a large amount of tail gas during the production process. The tail gas contains a large amount of urea dust. The untreated urea dust floats and settles with the air, causing serious environmental pollution. In order to solve the exhaust pollution problem of the urea granulation tower, a water washing and dust removal device is usually used at present. By installing a water washing and dust removal device on the ground or on the top of the tower, the atomized fine water droplets are used to absorb the dust particles in the tail gas, and then a liquid receiving tank is installed to ...

AI Technical Summary

Problems solved by technology

Among them, the installation of dust removal fan is a problem to be solved. The current solution is to install an integral fan on the top of the urea granulation tower to remove dust or use a large fan to remove dust as a whole. However, the dry granulation technology currently belongs to the existing water washing technology. The transformation of the existing urea prilling tower or the transformation of the existing urea prilling tower, there is no construction of a new urea prilling tower to coordinate the overall layout and installation; the installation of an integral fan or a large fan on the original washing prilling tower increases the load bearing of the urea prilling tower The load will further increase the risk load during the operation of the urea prilling tower

In addition, due to the unbalanced load distribution on the top of the tower, the load bearing of the urea prilling tower is also unbalanced. Affected by the vibration of the fan, the resonance will further reduce the service life of the top of the tower

At the same time, because the installation of the fan will inevitably occupy the space on the top of the tower, which further squeezes the installation space of the dust filter bag, so the existing dust filter bag and the installation position of the fan overlap up and down, resulting in the need for urea granulation when replacing the dust filter bag. Shutdown for maintenance, which greatly results in frequent shutdowns of production equipment and extremely damaged economic benefits

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