Heat medium boiler

A heating medium and boiler technology, applied in lighting and heating equipment, combustion methods, indirect carbon dioxide emission reduction, etc., can solve problems such as low thermal efficiency, and achieve the effect of maintaining and stable flammability

Inactive Publication Date: 2014-05-07
MIURA COMPANY LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, compared to the boiler efficiency of a small once-through steam boiler of about 92%, the boiler efficiency of a heat carrier boiler is about 80%, and the thermal efficiency is relatively low.

Method used

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  • Heat medium boiler

Examples

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Embodiment Construction

[0019] Hereinafter, the form for implementing the heating medium boiler which concerns on this invention is demonstrated in detail with reference to the Example shown in drawing.

[0020] figure 1 It is a schematic block diagram which shows an example of embodiment of the heating medium boiler concerning this invention.

[0021] In the heating medium boiler 1 of this example, a burner 2 is disposed on the upper part, and a combustion chamber 5 is formed inside a tank body 4 in which a heating medium oil heating pipe 3 is formed in a coil shape. The burner 2 is attached to an air box 6 provided on the upper portion of the tank body 4 , and includes a blower 8 for sending combustion air to the air box 6 through an air supply duct 7 . The blower 8 is equipped with an inverter 9, and by controlling the frequency of the inverter 9, the rotation speed of the blower 8 can be controlled to control the amount of combustion air. Connected to the tank body 4 is an exhaust gas duct 10 f...

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Abstract

A heat medium boiler (1) is provided with a recuperator (11) which preheats combustion air by causing the combustion air and gas discharged from the boiler to exchange heat with each other. The heat medium boiler (1) is provided with a fuel gas supply line (12) which supplies gas fuel to a burner (2), an inverter (9) which changes the rotational speed of an air blower (8), a fuel gas flow rate adjustment valve (13), a control means (16) which controls the fuel gas flow rate adjustment valve (13), and a pressure difference detection means (15) which detects a pressure difference across the recuperator (11). The control means (16) calculates the amount of combustion air on the basis of the detected pressure difference and controls the fuel gas flow rate adjustment valve (13) according to the calculated amount of combustion air. When a change in the combustion air exceeds a predetermined range, the control means (16) adjusts the frequency of the inverter (9) and controls the fuel gas flow rate adjustment valve (13) according to the amount of combustion air.

Description

technical field [0001] The present invention relates to a heating medium boiler provided with a heat exchanger for exchanging heat between waste gas discharged from a boiler that burns gaseous fuel and combustion air sent to the burner by a blower to Preheat with air. this application claims priority based on Japanese Patent Application No. 2011-225475 for which it applied to Japan on October 13, 2011, and uses the content here. Background technique [0002] The heating medium boiler heats the heating medium oil to the required temperature (250℃ ~300℃). The heating medium boiler is also used at a higher temperature. The temperature of the heated heating medium oil is around 300°C, so the temperature of the exhaust gas after heating in the heating medium boiler is above 350°C, and the energy taken away is relatively small. big. For example, while the boiler efficiency of a small once-through type steam boiler is about 92%, the boiler efficiency of a heating medium boiler ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23N1/04F23L15/00F23N5/00F23N5/18
CPCF23L15/00F23N1/022F23N5/00F23N5/18Y02E20/34
Inventor 宫崎辽太井上一信田中靖国小泽浩阿弥贵之
Owner MIURA COMPANY LIMITED
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