Control of blowdown in steam boilers

a technology of steam boilers and control valves, which is applied in the field of steam boilers, can solve problems such as blowdown operation, and achieve the effect of reducing heat loss
US20140102382A1Inactive Publication Date: 2014-04-17AUTOFLAME ENG
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
AUTOFLAME ENG
Publication Date
2014-04-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

Blowdown of a pressurised steam boiler heated by a burner 1 and including a blowdown flow control valve 17 is controlled by opening the control valve in response to receiving a control signal from a control unit 20 to allow water to leave the boiler. The control unit receives one or more signals indicative of the steam production rate of the boiler and adjusts the amount of blowdown in dependence upon the aggregate steam production.
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Description

TECHNICAL FIELD

[0001] This invention relates generally to blowdown of steam boilers heated by burners. More particularly, the invention relates to control systems for use in such installations and to methods of commissioning and operating such installations. The invention relates in particular, but not exclusively, to a steam boiler such as might be used in hospitals, hotels, offices or other industrial, commercial or domestic premises.BACKGROUND OF THE INVENTION

[0002] Steam boilers are well known. Examples of US patents referring to aspects of the design of pressurised steam boilers are U.S. Pat. No. 6,520,122 and U.S. Pat. No. 7,249,573, the contents of which are incorporated herein by reference.

[0003] Standard steam boilers are fitted with a bottom blowdown valve which, when opened for a short period of time allows an amount of hot water to leave the boiler, carrying with it solid deposits that have accumulated at the bottom of the boiler as it has been operating. The removal of su...

Claims

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