External mixing type three-fluid spray gun nozzle

Abstract

The invention discloses an external mixing type three-fluid spray gun nozzle. The external mixing type three-fluid spray gun nozzle comprises a nozzle body, an air cap, a first taper sleeve, a secondtaper sleeve, a retainer and the like. The nozzle body is provided with a first fluid channel, a second fluid channel and a third fluid channel, and swirl vanes are arranged in the first fluid channel, the second fluid channel and the third fluid channel. The three fluid channels provided for the three-fluid spray gun nozzle body are independent of one another and can allow three different kinds of fluids to be fed into the nozzle at the same time, three kinds of the fluids are always in the independent channels from entering the nozzle to being ejected out of the nozzle, liquid drops are atomized outside the nozzle, and therefore, the pressure changes of any of the three kinds of the fluids do not affect the pressure and flow of the rest of the fluids. The ratio of two liquid media can also be changed by adjusting the flow of the two liquid media according to needs in the use process, or the concentration of fluid media is changed, and thus the atomization effect and the mixing effectare fully guaranteed.

Description

technical field [0001] The invention relates to the technical field of spray gun nozzles, in particular to an external mixing type three-fluid spray gun nozzle. Background technique [0002] With the acceleration of industrialization, environmental pollution is becoming more and more serious, especially air pollution, which seriously endangers human health. The main pollutants of air pollution are waste gas produced in industrial production projects such as pulp mills, paper mills, and waste incineration plants. Emphysema contains a large amount of harmful gases such as sulfur dioxide and nitrogen oxides. In order to make the gas emitted by enterprises To meet the national environmental protection requirements, the waste gas must be desulfurized and denitrified. [0003] In today's desulfurization, denitrification and cooling systems, most of them adopt the neutralization method, that is, the liquid medium such as ammonia or lye with an appropriate concentration is sprayed ...

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Problems solved by technology

[0004] However, in actual production engineering, the concentration of harmful gases in the flue gas changes with time, so the concentration of the liquid medium must also be able to change with the concentration of harmful gases. Moreover, in some special industries, two One or more liquid media are mixed and sprayed. At present, the spray guns used in my country's industry are dual-fluid spray guns, that is to say, in addition to compressed air, only one liquid can be atomized and sprayed, although it can also be mixed The method of re-passing the spray gun, but this requires external storage equipment, which consumes space and increases costs, and if it is mixed and then connected to the spray gun, there will be a certain delay in time, and it is impossible to detect the concentration of harmful substances in real time. The effect of eliminating harmful gases is an urgent problem to be solved in industry

[0005] The internal mixing spray gun is the most widely used spray gun nozzle structure, but this spray gun has obvious disadvantages: when multiple fluids are fed into the spray gun at the same time, when the pressure of one of the fluids is too high, the remaining fluids will also be relatively large. There is a big change, because a variety of fluids in the internal mixing spray gun nozzle are mixed in the spray gun nozzle. When the pressure of one fluid is too high, it will block or even block the ejection of the rest of the fluid. This situation will greatly affect the injection, Effect of mixing and atomization, resulting in loss

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