Flue gas dust removal and denitration integrated device

Abstract

The invention provides a flue gas dust removal and denitration integrated device which comprises a machine head electric dust remover used for conducting dust removal treatment on sintering flue gas,a desulfurization reaction device, adust removal and denitration device, and smoke exhausting equipment; the sintering flue gas subjected to dust removal by the machine head electric dust remover enters the desulfurization reaction device to be subjected to desulfurization treatment; the sintering flue gas desulfurized by the desulfurization reaction device enters the dust removal and denitrationdevice to be subjected to dust removal and denitration treatment; and thesmoke exhausting equipment is used for exhausting the sintered flue gas denitrated by the dust removal and denitration device.According to the technical scheme, investment and operation cost are greatly saved, the occupied area is saved, the problem that the service life of the dust removal function and the service life of the denitration function are inconsistent is fundamentally solved, the service life is effectively prolonged, the maintenance cost is saved, resource recycling can be achieved through a reasonable mode, and pollution and waste are avoided.

Description

technical field [0001] The invention relates to the field of air pollution control, in particular to an integrated device for flue gas dust removal and denitrification. Background technique [0002] With the development of society, the non-electric industry is developing rapidly, and at the same time, the pollution to the environment is gradually intensifying, followed by the country's continuous introduction of increasingly stringent ultra-low emission requirements. In order to meet the requirements of ultra-low emissions, dust removal technology and denitrification technology have become key development and application technology projects in the non-electric industry. At present, dust removal technology is mainly realized through filter bag products; in denitrification technology, selective catalytic reduction (SCR) denitrification technology is the most efficient and mature denitrification technology. It uses ammonia or other reducing agents under the action of a specific...

AI Technical Summary

Problems solved by technology

There are several problems with this dust removal and denitrification integrated bag technology: 1. Although this design is conducive to improving the adhesion fastness and dispersion uniformity of the denitrification catalyst, the dust removal function and denitrification function of the integrated functional filter material are inconsistent. , when the denitrification function is difficult to meet the needs, the dust removal efficiency is still good, but at this time, in order to take into account the denitrification efficiency, the filter bag has to be replaced, resulting in the remaining waste of the integrated functional filter material on the dust removal function

2. Since the integrated functional filter material uses conventional filter material, it is still difficult to meet the working conditions of high flow rate and high dust in terms of service life, and the wear resistance, toughness and strength of the filter material are still There is a lot of room for improvement

3. Due to the need to ensure that the system has a low pressure loss, the number and thickness of filter bags loaded with denitrification catalysts are greatly limited, making it difficult to ensure the residence time of the flue gas on the surface of the catalyst, which seriously affects the denitrification efficiency; and In order to achieve the expected denitrification efficiency, the amount of ammonia injection must be increased, thereby aggravating ammonia slip

4. For the sintering flue gas, the concentration of CO in the flue gas is high, and the direct discharge will cause environmental pollution and waste energy

5. After 3-5 years, the integrated functional filter material will be scrapped collectively due to the expiration of its service life, resulting in a large number of discarded filter bags containing denitrification catalysts. On the one hand, it is hazardous waste and difficult to handle; on the other hand, it contains high-value V, W, Ti metal elements, if not recycled, will cause serious waste of resources

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