Electric dust collector, discharge electrode, method for producing the discharge electrode, and method for producing discharge needle
AssigneeHitachi Plant Technologies, Ltd.
InventorsMitsuaki Yanagida, Nobuhiko Shiromaru
Life of this patent
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Abstract
To improve anti-corrosion property in a wet-type electric dust collector while ensuring discharge function. A coating layer of thermoplastic resin is provided to an entire surface of a needle-type rigid discharge electrode including a support pipe and a discharge needle of an electric dust collector for removing a corrosive mist in an exhaust gas. Then, the coating layer on a tip surface of the discharge needle is coarsely polished and removed to expose a coarse discharge edge surface.
Claims7
An electric dust collector for removing a corrosive mist in an exhaust gas wherein a whole surface of a needle-type rigid discharge electrode including a support pipe and a discharge needle is coated by a layer of thermoplastic resin and the coating layer of a tip surface of the discharge needle is coarsely polished to remove the coating to expose a coarse discharge edge surface.
A discharge electrode comprising a coating layer of thermoplastic resin on a surface of a discharge electrode provided with a discharge projection on a side surface of a support member,
- wherein a tip portion of the discharge projection is cut together with the resin coating layer and has an exposed coarse edge surface.
A manufacturing method of a discharge electrode, comprising the steps of:
- coating a surface of the discharge electrode with a discharge projection provided on a side surface of a support member by thermoplastic resin;
- and
- cutting coarsely a tip portion of the discharge projection together with the resin coating layer to cause a sharp edge surface of the discharge needle to be exposed outside.
A manufacturing method of a discharge needle, comprising the step of:
- covering a discharge needle base material with a resin coating and coarsely polishing a tip portion of the discharge needle base material so that a coarsely-polished metal edge surface is exposed to be the discharge needle.
A manufacturing method of a discharge needle using a strip material as a base material of the discharge needle,
- wherein a tip surface of the needle is coarsely polished to form a plurality of sharp projections so that discharge may be carried out from the sharp projections thus polished.
Dependencies are inferred from the claim text.