Tail low-resistance heat exchange device for micro-positive pressure oil and gas fired boiler

Abstract

The invention discloses a tail low-resistance heat exchange device for a micro-positive pressure oil and gas fired boiler, which is characterized in that: exhaust gas discharged by the tail of the micro-positive pressure oil and gas fired boiler enters an inlet smoke box through a straight flue; a heat exchange component in the heat exchange device between the inlet smoke box and an outlet smoke box is a screwed pipe; the top of the heat exchange device is provided with an oxygen removing tower which is connected with an inlet water spray pipe; and the top of the oxygen removing tower is provided with a steam escape port. The tail low-resistance heat exchange device for the micro-positive pressure oil and gas fired boiler has the advantages of greatly improving the thermal efficiency of the micro-positive pressure boiler, reducing the manufacturing cost of the product, and ensuring stable and reliable running.

Description

technical field [0001] The invention relates to a micro positive pressure fuel gas boiler, more specifically a low-resistance energy saver for a micro positive pressure fuel gas boiler. Background technique [0002] The micro-positive pressure fuel-fired gas boiler is a new type of fuel-fired gas boiler technology that has occurred and developed in the last 30 years. Because it is very convenient to manufacture and use, especially the environmental protection feature is unmatched by any other boiler, so it is widely used in all walks of life. But because this kind of boiler can't be provided with tail heating device, its thermal efficiency is not high. Under the requirements of low-carbon economy, the boiler must also ensure the minimum thermal efficiency. In order to meet the requirements, there are some methods as follows: the basic methods are as follows: [0003] 1. The common tail heat exchanger, that is, "economizer" is used as the tail heating surface device of the ...

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Problems solved by technology

[0003] 1. The common tail heat exchanger, that is, "coal economizer" is used as the tail heating surface device of the micro positive pressure boiler, but its resistance is too large to continuously meet the specific combustion characteristics of the micro positive pressure boiler

[0004] 2. The flue-type heat exchanger is adopted. Although its resistance is small and can meet the flue gas flow characteristics of the micro-positive pressure boiler, its heat transfer efficiency, that is, the heat transfer coefficient, cannot meet the design requirements, so it is only limited to local use

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