Slag included lime cream slag removing method and device

Abstract

The present invention provides a slag removing method of lime milk containing slag and includes the following steps (a) carrying through gravitational settlement slag removing separation on the lime milk containing slag to acquire the lime milk processed by the first step; wherein, the slag containing concentration of the lime milk containing slag is 3 to 5 percent of the weight calculated by theweight of the lime milk containing slag; (b) carrying through solid-liquid hydrocyclone separation on the lime milk processed by the first step to separate the solid slag from the lime milk processedby the first step to acquire the lime milk and solid waste slag processed by the second step with an average concentration of less than 0.5 percent of the weight; and (c) carrying through further filtrating and separating on the lime milk processed by the second step to acquire the lime milk after processed. The present invention also provides a device applied to the method.

Description

technical field [0001] The invention relates to a method for removing slag from milk of lime containing slag. More specifically, it relates to a method for separating milk of lime, solid sand and large-grained lime slag in slag-containing milk of lime. The invention also relates to a device for the method. Background technique [0002] At present, in the propylene oxide plant in the field of petrochemical industry, as a lime milk system for the pretreatment of lime milk raw materials, most of the lime milk system has poor feed content and high slag content, resulting in secondary and saponification reduction production. . More importantly, when milk of lime with slag enters the saponification tower in the saponification process as raw material, it will cause blockage and fouling of the saponification tower, which will cause the saponification tower to be shut down for cleaning at regular intervals, resulting in great economic losses. Since the saponification tower mostly ...

AI Technical Summary

Problems solved by technology

For example, this kind of equipment has high requirements on the quality of the screen, because the size of the sand removal particles depends on the aperture of the screen, generally not less than 20-40 mesh / inch, otherwise it is easy to leak and block and cannot be used, so the life of the screen Short, strict operation and maintenance requirements

This equipment also has the disadvantage of large consumption of milk of lime

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