Desulfurization waste water multi-nozzle long-gun ejector

Abstract

The invention discloses a desulfurization waste water multi-nozzle long-gun ejector which comprises a gun body and at least one jet nozzle arranged on the gun body in the circumferential direction. The gun body consists of a gun head, an air pipe and a waste water pipe. The air pipe is of a tubular structure with two opened ends, one end of the air pipe is connected and sealed with the gun head, an installing cover is arranged at the other end of the air pipe, and an installing hole is formed in the middle of the installing cover. One end of the waste water pipe extends into the air pipe through the installing hole, and a gap is reserved between the end of the waste water pipe and the inner wall of the gun head. The end, extending into the air pipe, of the waste water pipe is a sealed end, and the other end of the waste water pipe is an opened end. An air cavity is formed between the waste water pipe and the air pipe. An air inlet end is formed in one end of the air pipe, and the air inlet end is connected with an external air generator through an air connecting pipe. The opened end of the waste water pipe is connected with an external waste water supplying device through a waste water connecting pipe, and the air pipe and the waste water pipe provide air and waste water required for work to the jet nozzles. The desulfurization waste water multi-nozzle long-gun ejector is simple in structure and can improve the smoke coverage degree of a mist spraying field to the most degree, the gasification time is shortened, and the penetration depth is increased and the controllability of a mist spraying angle is achieved while the atomization requirement is met.

Description

technical field [0001] The invention relates to a desulfurization wastewater treatment device for a power station boiler, in particular to a multi-nozzle lance injector applicable to a power station coal-fired boiler for desulfurization wastewater treatment. Background technique [0002] With the increasing pressure of national environmental protection, the tail gas of coal-fired boilers must be treated with flue gas such as desulfurization and denitrification. In particular, the desulfurization wastewater produced in the slurry tank of the absorption tower in the wet desulfurization process is difficult to treat; the latest desulfurization wastewater treatment process is to fully atomize the desulfurization wastewater into micron-sized droplets and spray them into the flue before the dust collector after the boiler air preheater. The temperature of the flue gas is used to evaporate the mist droplets, and finally the salt particles are collected in the dust collector equipme...

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Problems solved by technology

[0003] The difficulty of the process is that the flue gas flow rate in the flue is very high, generally around 10m / s, resulting in a short residence time of the droplets; at the same time, after heat exchange by the air preheater, the temperature of the flue gas is relatively low, generally at 105-150 ℃, so that the vaporization of the droplets is slow; in order to ensure that the atomized droplets can be fully vaporized in a short time, this requires a high atomization performance of the spray gun; not only the atomized particles must be small enough, but also must be able to The flue gas is fully mixed; due to the short penetration depth of the atomized liquid droplets of the conventional wall spray gun, it is difficult to meet the requirements of uniform mixing with the flue gas

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