Spiral separating device

Abstract

The invention discloses a spiral separating device. An air inlet tube section (4) is arranged on a spiral casing (1) and a spiral swirl air flue (5) is arranged in the spiral casing (1). The upper part of an assistant cylinder (3) is positioned outside the spiral casing (1) and the upper part of a main cylinder (2) is positioned inside the spiral casing (1). A passage (6) communicated with the inner cavity of the assistant cylinder (3) is arranged on the outer wall of the middle section of the spiral swirl air flue. At least one deflector (7) is arranged in the spiral swirl air flue and at the part of the passage (6), and an air flue (8) communicated with the inner cavity of the main cylinder (2) is arranged on the inner wall of the end section of the spiral swirl air flue. A first nozzle (9a) of a pressure balancing air flue tube (9) is communicated with the upper part of the inner cavity of the assistant cylinder (3) and a second nozzle (9b) is communicated with the upper part of the inner cavity of the main cylinder (2). An air outlet (10) is arranged at the lower part of the main cylinder (2) and a discharge hole (11) is arranged at the lower part of the assistant cylinder (3). A secondary separator (12) is arranged at the first nozzle (9a) and a pressure balancer (13) is arranged at the second nozzle (9b).

Description

Technical field [0001] The invention relates to a device for separating coarse and fine particles in an airflow, in particular to a separation device in the form of volute swirling flow. Background technique [0002] The utility model patent specification No. 200320130984.2 published on December 15, 2004 with the authorized announcement number CN2663009Y discloses a "high-efficiency cyclone separator". The separator includes a shell composed of a cylinder and a cone. The shell is provided with an air inlet pipe, a deflector, and an air outlet pipe. The lower part of the shell has a particle outlet. The structure is simple and has a good separation effect. The disadvantages are: firstly, because the cyclone separator is based on the structural principle of cyclone separation, the inner cavity of its shell is a sudden change section with a large upper part and a smaller lower part, the gas flow rate and pressure difference during operation change greatly, and the centrifugal f...

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Problems solved by technology

The disadvantages are: firstly, because the cyclone separator is based on the structural principle of cyclone separation, the inner cavity of its shell is a sudden change section with a large upper part and a smaller lower part, the gas flow rate and pressure difference during operation change greatly, and the centrifugal force produced Part of the medium and coarse particles after preliminary separation by mutual friction and throwing are easily taken away by the airflow again due to the large pressure difference change, thus affecting the separation effect; The increase of the air flow velocity will lead to the increase of the resistance of the system and the increase of energy consumption; thirdly, the coarse and fine particles are separated by centrifugal movement along the inner wall of the shell, and the coarse particles are separated from the The friction generated by the inner wall of the housing is relatively high, so the housing components are prone to wear

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