Novel layer burning boiler

Abstract

The invention provides a novel layer burning boiler. A hearth smoke outlet is arranged above the middle part of a hearth; the hearth of the boiler adopts the hearth structure of a corner tube boiler; and the main convection heating surface of the boiler adopts the boiler convection tube bank structure of an SHL boiler. A large amount of heating surface tubes such as boiler tube banks are connected with upper and lower boiler barrels directly, and the boiler adopts a water cooled communicating tube supporting and steel frame supporting combined supporting mode. The novel layer burning boiler has the characteristics that: the smoke in the hearth is fully mixed; the dust content of the smoke is low; the temperature of the effluent of an economizer is low; the large amount of boiler banks are convenient to check and maintain; the economizer and an air preheater can be arranged flexibly and conveniently; and the like. The novel layer burning boiler is mainly used in the fields requiring traveling grate boilers and reciprocating grate boilers.

Description

technical field [0001] The invention belongs to a layer-fired boiler, in particular to a novel layer-fired boiler whose combustion equipment adopts a chain fire grate or a reciprocating fire grate. technical background [0002] Layer-fired boilers, especially chain grate boilers, are the boiler products with the widest application and the largest quantity in my country's boiler market. The main furnace types are DZL, SZL, DHL, SHL, etc. Most of these furnace types are developed on the basis of importing or referring to foreign furnace types. Most of them have a history of nearly a hundred years, and some have a history of decades. These furnace types are still the leading products of most domestic boiler manufacturers. With the development of society, the market puts forward higher requirements for various performances of boilers. Although many original furnace types have been continuously improved, there is still a certain gap from the market demand. For example, the actu...

AI Technical Summary

Problems solved by technology

For example, the actual operating parameters of some users have a wide range of changes and frequent changes, which may easily lead to safety accidents; another example is that there is a relatively high dust concentration in the flue gas at the furnace outlet, which increases the amount of ash on the convective heating surfaces such as economizers and air preheaters, resulting in The heat absorption capacity of the heating surface is reduced, and the exhaust gas temperature is increased, which will eventually lead to problems such as reduced boiler operating efficiency and increased pollution emissions.

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