Gas opener

The invention discloses a gas opener. A first air inlet hole passing through a wall body is formed in the peripheral wall of a gas overflow tank; a tank port which is only enclosed by the own peripheral wall of the gas flow tank is formed in the top of the gas overflow tank; a tank cover is used for sealing or opening the tank port; a second air inlet hole and an air outlet hole passing through a cover wall are formed in the tank cover; a sieving basin is arranged in the gas overflow tank, and is positioned between the first air inlet hole and the sealed bottom wall body of the gas overflow tank; the inner tank cavity of the gas overflow tank is partitioned into an air current acting chamber positioned between the tank port and the sieving basin, and a sundry settling chamber between the sieving basin and the sealed bottom wall body of the gas overflow tank; support plates are fixedly arranged on the peripheral inner wall surface of the gas overflow tank between the sieving basin and the ...