Efficient denitration device for flue gas of boiler

Abstract

The invention discloses an efficient denitration device for a flue gas of a boiler. The efficient denitration device comprises a wastewater treatment device and a stirring and medicine-delivering device, wherein a medicine storage tank A is connected with a metering pump A; the metering pump A is connected with the stirring and medicine-delivering device through a pipeline; a medicine storage tank B is connected with a metering pump B; the metering pump B is connected with a stirring device through a pipeline; a denitration tower is arranged above the stirring and medicine-delivering device and comprises an air inlet, a spray layer and a demist layer; the air inlet is formed in the bottom of the denitration tower; a medicine delivery device A is connected with the spray layer; a medicine delivery device B is connected with the spray layer; and a demister washing device is connected with the demist layer. The efficient denitration device has the beneficial effects that the investment operation cost is greatly reduced; the efficient denitration device is small in pressure loss, stable to run in actual use, and convenient and fast to mount; the gas treatment efficiency is high due to multi-stage spray layer and demist layer; meanwhile, the efficient denitration device is small in floor area; treatment of a nitric oxide gas is relatively thorough; and the emission standard of the national requirements is reached.

Description

technical field [0001] The invention relates to the field of waste gas treatment, in particular to a high-efficiency denitrification device for boiler flue gas. Background technique [0002] Nitrogen oxides are an important air pollutant. The main hazards are: 1. Promote the production of acid rain; 2. Increase the ozone concentration in the near-surface atmosphere, produce photochemical smog, and affect visibility; 3. Strong stimulation to the human body effects, causing respiratory diseases and, in severe cases, death. In recent years, with the strengthening of national environmental protection policies, the requirements for the purification of nitrogen oxides have become higher and higher. [0003] For the flue gas of nitrogen oxides produced by the combustion of boilers in power plants, SNCR and SCR methods are often used to treat them. These methods require high labor costs, low treatment efficiency, and high operating costs. At the same time, the reducing agent ammoni...

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Problems solved by technology

[0003] For the flue gas of nitrogen oxides produced by the combustion of boilers in power plants, SNCR and SCR methods are often used to treat them. These methods require high labor costs, low treatment efficiency, and high operating costs. At the same time, the reducing agent ammonia water used has high safety requirements for storage. During the operation of production equipment, the instability of negative pressure and incomplete exhaust gas treatment

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