Foam generator for coal mine dedusting

Abstract

The invention relates to a foam generator used for coal mine underground dust removal, mainly comprising a cylinder body, a Venturi tube, a spoiler, baffle plates and so on, wherein, the cylinder body is a cylinder; the Venturi tube is arranged inside the cylinder body; a diffuser of the Venturi tube is uniformly provided with a certain number of air inlet pores; the spoiler is a hollow cone and is horizontally arranged inside the space of the diffuser of the Venturi tube and fixed on the cylinder body by a support; a plurality of pores are arranged on the surface of the spoiler; the baffle plates are arranged on the rear of the foam generator. Gas enters from the side face of the cylinder body of the foam generator; foam liquid flows into the foam generator through a pipe on the front end of the foam generator; the flow velocity of the foam liquid is increased when the foam liquid passes through the throat section of the Venturi tube, and jets are formed; gas uniformly enters from the pores of the diffuser of the Venturi tube, and the gas and the liquid are fully mixed after passing through the spoiler and a plurality of baffle plates, consequently two-phase foams are generated. The foam generator used for coal mine underground dust removal has the advantages of stable structure, convenient use, light weight, small volume, no blockage and good foaming effect.

Description

technical field [0001] The invention relates to a foam generating device, in particular to a foam generating device for coal mine dust removal, Background technique [0002] Every process of coal mine operation is accompanied by a large amount of dust. Workers working in this environment will inevitably inhale a large amount of dust, which seriously endangers the physical and mental health of workers. At present, there are about 260,000 pneumoconiosis patients in my country's coal mining industry, and the number is increasing at a rate of 5,000 per year. About 3,000 people die of pneumoconiosis every year, which has brought great pain to patients and their families, and also caused great harm to the country. Huge economic loss. In order to effectively prevent and control coal mine dust, foreign countries began to study foam dust removal in the 1970s, and the key technology of foam dust removal is the foam generator. [0003] At present, the most widely used two-phase foam g...

AI Technical Summary

Problems solved by technology

The currently used net-type foam generator uses gas directly through the pipeline to enter the foam generator, blowing the liquid film on the foaming net for foaming. Underground coal mines often use compressed air with high pressure and high flow rate, which will cause the airflow to be too violent and blow Scatter or atomize the liquid film to reduce the foaming ratio; in addition, the existing mesh foam generators mostly use nozzles to achieve the purpose of uniformly dispersing the liquid; coal mine underground water often contains impurities, which can easily cause nozzle blockage and affect the use; mesh type The distance between the nozzle inside the foamer and the foaming net is fixed, but during use, when the pressure of the liquid is different, the range of the nozzle is different, so the film-forming efficiency of the liquid on the foaming net is different, affecting foaming effect

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