Inverted grate-firing boiler

Abstract

The invention discloses an inverted grate-firing boiler, which comprises a feeding system, a combustion system, a heat exchange system, a slag removal system and a smoke exhaust system and is provided with a cylindrical boiler body. A combustion chamber is arranged on the lower portion of the boiler body, a feeding port is disposed on the top of the boiler body, a bin is arranged below the feeding port, a separation sealing door is disposed between the bin and the combustion chamber, sealing heat-insulation layers are arranged on the upper surface and the periphery of the boiler body, an air inlet is only arranged at a fire grate of the lower portion of the combustion chamber, and a smoke exhaust channel is positioned on a side surface of the lower portion of the combustion chamber. A combustion mode of the inverted grate-firing boiler is completely different from a combustion mode of a traditional fixed fire grate or mechanical movable fire grate. The inverted grate-firing boiler hasthe advantages that the inverted grate-firing boiler has a stable combustion layer, a heat conduction mode is efficient, and a heat exchange water pipe is always positioned in the stable combustion layer. In addition, standards of selected fuel are lowered, and simultaneously, frequency of adding fuel within unit time is reduced. Theoretically speaking, the total amount of materials added at one step can be increased unlimitedly as long as the boiler can be structurally manufactured properly.

Description

1. Technical field [0001] The invention belongs to the technical field of solid fuel boilers, and in particular relates to an atmospheric pressure hot water boiler. 2. Background technology [0002] At present, the solid fuel layer-fired atmospheric hot water boilers used in industrial production and social heating can be divided into two types: fixed grate and mechanized mobile grate according to their different combustion methods. Fixed grate refers to the burning method of placing solid fuel on a fixed grate. This is one of the oldest and simple layer combustion methods. The biggest problem with the layer combustion method with fixed grate is the addition of fuel and the removal of ash. Due to the limited amount of fuel added each time, the addition is very frequent. The cold fuel added each time directly covers the combustion layer, and the preheating is insufficient, resulting in a reduction in combustion efficiency. As for the ash, on the one hand, if it is not remo...

AI Technical Summary

Problems solved by technology

The complex radiation mode makes it difficult for the heat exchange pipe to absorb all the heat released in different stages to the maximum extent, and the further loss of heat will further reduce the thermal efficiency of the boiler

(3) In addition to the problem of low thermal efficiency, chain furnaces are also very picky about fuel

(4) It has the same problem as the fixed grate, the fuel added at one time is limited and needs to be added frequently

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