A device and process for ultra-low emission of flue gas in non-electric field

Abstract

The invention discloses an ultra-low emission device for flue gas in the non-electric field, which includes a built-in guide plate, a main tower for filtering and dust removal parts, a front RCO / RTO device, a rear RCO / RTO device, and an SCR device equipped with an SCR catalyst. The outer wall of the bottom of the main tower is provided with a flue gas inlet, and the top is equipped with a flue gas outlet. A desulfurizer injection device is installed outside the flue gas inlet. The flue gas outlet is connected to the front RCO / RTO device and the rear RCO / RTO device through the inlet three-way valve. The front RCO / RTO device and the rear RCO / RTO device are heat storage reactors and are connected to the SCR device through one inlet pipeline and one outlet pipeline. The inlet pipeline is equipped with a reducing agent spray device, and the outlet pipeline is equipped with a SCO with built-in SCO catalyst. The reactor, the front RCO / RTO device and the rear RCO / RTO device are respectively connected to the net flue gas outlet. It can remove dust, desulfurize oxides, denitrify, deVOCs gas, and process malodorous gases such as ammonia, etc. It integrates multiple flue gas treatment functions and is suitable for collaborative processing devices and processes in non-electric fields.

Description

technical field [0001] The invention relates to the technical field of air pollution control, in particular to a device and process for synergistic ultra-low emission of flue gas multi-pollutants that can be applied to non-electric fields such as cement plants, biomass power plants, and steel plants. Background technique [0002] The complex and changeable flue gas working conditions are the main difficulties in the treatment of flue gas pollutants in the non-electric field. With the basic completion of ultra-low emissions of coal-fired units, ultra-low emissions in non-electric fields have been carried out in key areas such as iron and steel, and will inevitably be extended to cement, glass, biomass power plants, waste incineration and other fields in the future. Compared with coal-fired flue gas, flue gas in non-electric fields has a lower temperature and complex composition. In addition to sulfur oxides, nitrogen oxides (NOx), and dust, part of the flue gas also contains ...

AI Technical Summary

Problems solved by technology

[0003] Existing technologies are difficult to achieve ultra-low emission control in the non-electric field

Although the treatment technologies for dust and sulfur oxides are mature, they often require the construction of special treatment equipment, which will lead to high environmental protection costs; even with the existing integrated technology, there are still flue gas pollutants that do not match the non-electric field Governance, inability to perfect the exhausted smoke pollution and other issues

[0004] For NOx, the existing low-temperature denitrification technology has poor stability, and the denitrification efficiency of SNCR technology is low, and the denitrification effect is difficult to guarantee

For VOCs gas, there has not been a well-recognized technology in China

As for the malodorous gases such as ammonia in the flue gas in the non-electric field, environmental protection enterprises have not yet attracted enough attention

If a separate removal device is installed for each of the above pollutants, it will greatly increase the environmental protection cost of the enterprise

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