Tea greening device

Abstract

The invention belongs to the technical field of tea leaf processing machinery. A tea leaf enzyme-deactivating airing device comprises a machine frame, wherein a mesh belt is arranged on the machine frame; an upwardly-inclined feeding conveying part is arranged on the left side of the mesh belt; a high-temperature steam chamber and an air cooling chamber are sequentially arranged above the mesh belt; a heating furnace and a steam tank are arranged inside the high-temperature steam chamber and at the lower part of the mesh belt; an electric heating tube is arranged inside the steam tank; a hot air output pipe of the heating furnace is transversely suspended above the steam tank; a plurality of upward air outlets are formed in the hot air output pipe; an exhaust fan is mounted at the top of the high-temperature steam chamber. The tea leaf enzyme-deactivating airing device is simple in structure, can quickly heat the interior of a tea leaf layer and has a relatively good tea leaf enzyme-deactivating effect.

Description

technical field [0001] The invention belongs to the technical field of tea processing machinery. Background technique [0002] It is one of the important equipments for green tea, green tea, black tea and yellow tea processing. The main function of the greening machine is to destroy the activity of polyphenol oxidase in tea, avoid the oxidation of polyphenols, and prevent the redness of fresh leaves. The traditional de-enzyming process requires the principles of "high-temperature de-enzyming, first high and then low", "throwing combined with dullness, more throwing and less dullness". For this reason, the de-enzyming machine must be able to rapidly increase the leaf temperature in a short period of time and passivate polyphenols. Oxidase activity, and the temperature is required to be adjustable and convenient in the whole deenzyming process. The optimum temperature of polyphenol oxidase is 52°C, and the passivation critical temperature is 85°C. Therefore, it is required t...

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Problems solved by technology

[0003] The main mechanism of the steam heat transfer machine includes a mesh belt, a steam generator, a frame and a transmission mechanism. The steam generator is a water tank equipped with an electric heating tube, and the high-temperature steam chamber is above the water tank. The disadvantage of this way of finishing the tea leaves in the high-temperature steam room is that the time for the tea leaves to be transported through the steam generating room through the mesh belt is relatively short, and the time for the steam to rise from the water tank and then naturally rise through the tea layer is relatively long, which makes the tea leaves Some tea leaves inside the layer cannot be heated up to the oxidase inactivation temperature quickly, which will eventually affect the greening effect of the tea

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