Active coke flue gas purifying system

Abstract

An active coke flue gas purifying system includes an adsorption / regeneration integrated purifying column, a vibrating sieve, a bucket elevator, a material storage bin and a chimney. The adsorption / regeneration integrated purifying column is communicated with the chimney, the vibrating sieve and the bucket elevator respectively. The interior of the adsorption / regeneration integrated purifying column successively includes an adsorption section, an upper tapered material distributor, a regeneration gas exhaust section, a regeneration heating section, a regeneration cooling section and a lower tapered material distributor. The system is in an integrated structure and allows adsorption and regeneration to be completed in one column, so that the system reduces loss of active coke, reduces energy consumption, is highly environment-friendly, allows high-effective synergistic treatment of various pollutants and resource recycling, is small in land occupation area and is low in energy consumption.

Description

technical field [0001] The invention belongs to the technical field of flue gas purification, and in particular relates to an activated coke flue gas purification system. Background technique [0002] Coal-fired boilers, sintering, pelletizing and other production projects produce a large amount of flue gas, and the SOx, NOx, particulate matter, heavy metals and dioxins contained in the flue gas pollute the environment. With the increasingly stringent national environmental protection requirements, the technology of comprehensive treatment of multiple pollutants is an inevitable trend in the development of flue gas treatment. [0003] Activated coke flue gas purification technology can realize low-temperature denitrification on the basis of desulfurization, and has a certain removal effect on dust, heavy metals, dioxins and other pollutants. In addition, the by-product of desulfurization is high-quality sulfuric acid, which can recover sulfur resources, conforms to the conc...

AI Technical Summary

Problems solved by technology

In addition, the by-product of desulfurization is high-quality sulfuric acid, which can recover sulfur resources, conforms to the concept of circular economy, and is currently recognized as the most promising comprehensive treatment technology for various pollutants in the world; however, the high operating cost also limits the application of this technology. Promote application

[0004] Activated coke flue gas purification technology is mainly composed of adsorption process and regeneration process. During the adsorption process, the pollutants in the flue gas are adsorbed on the surface of the active coke; during the regeneration process, the pollutants are desorbed from the surface of the active coke, and the active coke realizes regeneration and recycling. ;Adsorption reactor and active coke regeneration reactor are the core equipment of activated coke flue gas purification technology, and the development of adsorption and regeneration reactors for co-processing of various pollutants and low operating cost is the key to active coke flue gas purification technology; The most widely used process method is to arrange the adsorption tower and the regeneration tower separately. For example, the patent CN102430318 and the patent CN104801174 respectively disclose an activated coke flue gas purification system. The adsorption tower and the regeneration tower are arranged separately, and the active coke circulates through multiple horizontal conveying equipment Realized with vertical conveying equipment, the energy consumption is large, and the active coke is poured repeatedly, resulting in a large loss, which increases the operating cost; patent CN104785082 discloses an adsorption and regeneration integrated tower, the adsorption and regeneration functions can be combined in one tower However, the pipeline in the tower is complicated, which may easily cause uneven feeding of active coke and local heat storage

[0005] In summary, the existing activated coke adsorption reactors and regeneration reactors and processes have disadvantages such as complex process, numerous equipment, high energy consumption, uneven feeding of activated coke, and easy heat storage. It is necessary to develop new activated coke smoke Gas purification process and new structure of adsorption regeneration reactor to reduce the loss of active coke during operation, thereby reducing operating costs

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