Inner cone powder return air locking valve and coarse and fine powder separator

Abstract

The invention discloses an inner cone powder return air locking valve which comprises a powder return tube and an air locking baffle. The powder return tube is a hollow tube body, the two ends of the powder return tube are provided with a connector and an opening respectively, the connector is used for being communicated with the inner cone bottom of a coarse and fine powder separator, and the opening is used for leading coarse powder returned by an inner cone into an outer cone powder return flow pass of the coarse and fine powder separator. The air locking baffle is arranged at the opening of the powder return tube and is connected with the powder return tube in a rotating mode, accordingly, the air locking baffle can seal the opening under the action of the self gravity, and the opening is opened under the gravity effect of the coarse powder accumulated by the powder return tube. The inner cone powder return air locking valve is provided with the powder return tube and the air locking baffle, the powder return tube leads the coarse powder returned by the inner cone into the outer cone powder return flow pass, and the phenomenon that the coarse powder falls into the air powder flow pass to affect the fine powder carrying capacity of airflow, and accordingly the separating effect of the fine powder separator is poor can be avoided. The inner cone powder return air locking valve is simple in structure and capable of improving the separating effect and the stability of the fine powder separator.

Description

technical field [0001] The invention relates to the field of separation devices for coarse powder and fine powder of powdery materials, in particular to an inner cone powder return air lock valve. In addition, the present invention also relates to a coarse and fine powder separator comprising the above-mentioned inner cone powder return air lock valve. Background technique [0002] The coarse and fine powder separator is a common device, which is often used in pulverizing systems, such as coal-fired thermal power generation pulverizing systems, cement production pulverizing systems, etc., and is installed after the outlet of the pulverizing equipment mill. Existing coarse and fine powder separators can be roughly divided into two categories, one is static separators, and the other is dynamic separators. Such as figure 1 As shown, a general coarse and fine powder separator includes an outer cone 600, an inner cone 400, a powder raising pipe and a powder returning pipe, and ...

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Problems solved by technology

[0003] The invention provides an inner cone powder return air lock valve and a coarse and fine powder separator to solve the problem that the coarse powder returned by the general inner cone powder return air lock valve falls into the air powder flow channel and the separation effect of the coarse and fine powder separator is poor. technical problem

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