Device and method for performing integrated purification on smoke

Abstract

The invention provides a device and a method for performing integrated purification on smoke. The device comprises an adsorption column. The adsorption column comprises a smoke inlet, a smoke outlet, a calcium hydroxide bed, an activated coke bed, a gas uniform distributor and an ammonia distributor, wherein the calcium hydroxide bed is located at the lower part of the adsorption column; the activated coke bed is located at the upper part of the adsorption column; the smoke inlet is located below the calcium hydroxide bed; the smoke outlet is located above the activated coke bed; the ammonia distributor is located between the calcium hydroxide bed and the activated coke bed; and the gas uniform distributor is located between the smoke inlet and the calcium hydroxide bed. The device for performing the integrated purification on the smoke is convenient in running and maintenance. The method for performing the integrated purification on the smoke is simple in process step. The integrated purification is realized by the device and the method.

Description

technical field [0001] The invention belongs to the field of flue gas purification, and in particular relates to an integrated device and method for purifying flue gas. Background technique [0002] The flue gas produced in coal-fired boilers, sintering machines, and coking processes generally contains nitrogen oxides (NO X ), SO 2 , HCL, dioxins, heavy metals and other harmful substances. Due to the complex composition of pollutants, different purification methods are required. Most of the current purification processes use hierarchical and step-by-step purification. For example nitrogen oxides (NO X ) generally adopts SCR selective catalytic reduction method. SO 2 , HCL is removed by limestone-gypsum wet method or ammonia method, magnesium method and other wet methods. Dioxins and heavy metals are generally purified and removed by tail spraying activated carbon powder and bag filter. Each purification method has certain problems. For example, the SCR catalyst needs ...

AI Technical Summary

Problems solved by technology

Each purification method has certain problems. For example, the SCR catalyst needs to be replaced regularly. The replaced catalyst is highly toxic, and improper post-treatment will inevitably cause secondary pollution to the environment.

The water consumption of the wet desulfurization process is huge, and the application in water-scarce areas is greatly restricted

The method of removing dioxins and heavy metals by spraying activated carbon powder causes a great waste of resources and high cost due to the one-time use of activated carbon powder

These problems are subject to certain restrictions on the application of flue gas purification

In addition, because the technology is using a combined process, the process is complicated, there are many equipments, and it is difficult to operate and maintain

Images