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Hearth heat exchanger and ultralow nitrogen gas-fired hot water boiler

A gas-fired hot water and heat exchanger technology, applied in the field of boilers, can solve the problems of inconsistent expansion rate, damage, and large temperature change range of welding joints, and achieve the effects of improving product quality, long service life, and eliminating water leakage problems

Inactive Publication Date: 2020-11-13
和烁(张家港)热能设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Among them, gas-fired hot water boilers are widely used due to their advantages of high convenience, small size, and high water outlet efficiency; The conversion range is extremely large, and due to the inconsistency of materials between the heat exchange components in the furnace, the problem of damage to the welded joints due to inconsistent expansion rates will eventually occur during use. There is no good solution yet.

Method used

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  • Hearth heat exchanger and ultralow nitrogen gas-fired hot water boiler
  • Hearth heat exchanger and ultralow nitrogen gas-fired hot water boiler
  • Hearth heat exchanger and ultralow nitrogen gas-fired hot water boiler

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0023] refer to figure 1 As shown, an embodiment of the furnace heat exchanger of the present invention includes a first object 1 and a second object 2 with different coefficients of thermal expansion, the first object and the second object are welded and connected by a third object 3, and the third object The coefficient of thermal expansion of the object is between the first object and the second object. The third object absorbs a certain thermal expansion stress to effectively protect the stability of the weld, thereby solving the problem of thermal stress cracks.

[0024] refer to figure 2 As shown, the first object is a header, the second object is a furnace radiant tube, ...

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Abstract

The invention discloses a hearth heat exchanger. The hearth heat exchanger comprises a first object and a second object which are different in thermal expansion coefficient, wherein the first object and the second object are in welded connection through a third object; and the thermal expansion coefficient of the third object is between those of the first object and the second object. The invention further provides an ultralow nitrogen gas-fired hot water boiler comprising the hearth heat exchanger. The hearth heat exchanger does not cause thermal stress cracks, so that hot water leakage is prevented, and the normal running of a boiler system is ensured.

Description

technical field [0001] The invention relates to the field of boilers, in particular to a furnace heat exchanger and an ultra-low nitrogen gas-fired hot water boiler. Background technique [0002] The boiler is a kind of energy conversion equipment. The energy input to the boiler includes chemical energy and electric energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of heat energy. [0003] Among them, the gas-fired hot water boiler is widely used due to its advantages of high convenience, small size, and high water outlet efficiency; The conversion range is very large, and because of the inconsistency of materials between the heat exchange components in the furnace body, the problem of damage caused by the inconsistent expansion rate of the welding point will eventually appear during use. There is no good solution yet. Contents of the invention [0004] The technical problem to be solved by the present i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D1/053F28F21/00F24H1/40F24H9/18F23J15/06
CPCF28D1/05316F28F21/00F24H1/40F24H9/1836F23J15/06Y02E20/30
Inventor 沈玲玲钱峰王善荣
Owner 和烁(张家港)热能设备有限公司