Mitsubishi Hitachi Power Systems Environmental Solutions, Ltd.

Mitsubishi Hitachi Power Systems, Ltd.

Mitsubishi Heavy Industries Power Environmental Solutions, Ltd.

Katsuhisa Kojima

Yasutoshi Ueda

Takao Tanaka

Kazutaka Tomimatsu

Masaya Kato

Takashi Sonoda

Masao Terazaki

A dust collection system, a dust collection method, and a dust collector, can enhance dust-collecting efficiency while reducing the volume of the dust collector as a whole. A dust collector is provided with a casing having an inlet into which gas is introduced; a discharge electrode to which voltage is applied, the discharge electrode being disposed inside the casing and having a spike called discharge spike and mounting frames for supporting the discharge spike; and a collecting electrode having a planar member, disposed inside the casing facing the discharge electrode, the mounting frames being inclined with relation to the gas flow at the inlet. Two mounting frames are connected to each other on the downstream side of the gas flow, and are arranged so that, between the two mounting frames, the upstream side of the gas flow is wider than the downstream side of the gas flow.

Dust collector, dust collection system, and dust collection method

The purpose of the present invention is to provide a dust collector, an electrode selection method for a dust collector, and a dust collection method such that it is possible to select a suitable wire mesh to be used in a collecting electrode and thereby improve the collecting efficiency even at high flow velocities. A dust collector has a discharge electrode to which a voltage is applied, and a collecting electrode that is disposed facing the discharge electrode and has a planar member formed of a wire mesh, wherein the wire mesh of the planar member satisfies equations &#x3c;1&#x3e; and &#x3c;2&#x3e; below, and the gas face velocity (v) of the gas penetrating the wire mesh is v=0.1 m/s or higher. &#x3c;1&#x3e; IndexT=(the inter-wire distance&#xf7;2)&#xf7;the opening ratio&#xf7;the wire diameter&#xd7;the gas face velocity &#x3c;2&#x3e; IndexT&#x2266;2.

Dust collector, electrode selection method for dust collector, and dust collection method

This gas turbine includes a turbine cooling structure of cooling a turbine by using cooling air and a filter that reduces dust in the cooling air on an upstream side of the turbine. Furthermore, the gas turbine includes a supply pipe for supplying the cooling air to the filter, a branch pipe that is branched from the supply pipe on an upstream of the filter, and a unit that calculates or estimates a circulation amount of dust in the cooling air. In this gas turbine, at a time of start-up of a turbine, the supply pipe is closed and the branch pipe is opened, and when the circulation amount of dust in the cooling air becomes equal to or less than a predetermined threshold, the supply pipe is opened and the branch pipe is closed.

Gas turbine

Growing community of inventors

Tokyo, Japan

Katsuhisa Kojima