Boiler with water pipes and fire pipes with flow in opposite directions

Abstract

A water-tube fire-tube positive-negative convection combustion boiler comprises boiler tube, combustion chamber and grate. In the combustion chamber are set with a front arch, a I-type vertical arch, a II-type vertical arch and a III-tye vertical arch on each vertical arch is set with a firing hole. There is a fire hole respectively at the lower part of the I-type arch and the II-type arch, and between the upper part of the II-type arch and the top of the combustion chamber there is clearance, the III-type arch is of lattice wall type or through hole type and there is a fire hole at the lower part of both types. Said boiler has the advantages of stable combustion, quick temperature raising, immediately and directly firing the combustible articles, high heat efficiency, and reduced the quantity of accumulated dust.

Description

(1) Technical field:

[0001] The invention relates to the design and manufacture technology of a water-fire tube boiler. (two) background technology:

[0002] The commonly used water-fire tube boiler is composed of a boiler tube, a combustion chamber and a fire grate. A herringbone furnace arch is set in the combustion chamber, and the front and rear arches are used for strong convection combustion. The actual operation shows that the speed of the smoke ejected from the rear arch is not high, and the smoke flow is close to the arch surface and flows in a thin layer, which cannot rush into the front arch to fill the front arch area with flames, and the temperature in the front arch area is not high , leading to poor ignition performance of the furnace, low mixing performance, black smoke from the boiler, and excessive smoke and dust emissions, which seriously affect the environmental quality. (3) Contents of the invention:

[0003] The invention focuses on solving the above...

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