Water-cooled rotary grate straw bale-fired semi-gasified direct-fired atmospheric pressure hot-water boiler

Abstract

The invention discloses a water-cooled rotary grate straw bale-fired semi-gasified direct-fired atmospheric pressure hot-water boiler. The hot-water boiler comprises a straw baling drying chamber, a vertical cylindrical boiler shell, a boiler inner liner and a water-cooled rotary grate, wherein the straw baling drying chamber communicates with the bottom of the boiler inner liner; the vertical cylindrical boiler shell is arranged on the outer side of the boiler inner liner, and an interlayer between the vertical cylindrical boiler shell and the boiler inner liner is a boiler water layer; and the water-cooled rotary grate is arranged at the bottom of the vertical cylindrical boiler shell. The water-cooled rotary grate straw bale-fired semi-gasified direct-fired atmospheric pressure hot-water boiler solves the problem of the straw bale-fired direct-fired, so that the intermediate processing and forming links are omitted without processing bale straws into granules or compacts, and the operation cost is reduced; the bale straws are easy to loose, so that the bale straws can fully burn in the boiler; and the boiler has high thermal efficiency and can prevent the straws from coking andNOx from generating, so that the effects of energy saving and environmental protection are achieved.

Description

Technical field [0001] The invention relates to the technical field of straw combustion, and more specifically to a water-cooled rotary grate straw bale burning semi-gasification direct-fired atmospheric hot water boiler. Background technique [0002] With the frequent occurrence of smog in my country and the increasing awareness of environmental protection by human beings, how to suppress pollution emissions at the source has become a top priority, and it is extremely urgent to find a clean and reliable energy source. Biomass fuel has the characteristics of high volatile content, flammability, low ash content, and less harmful gases such as SOx and NOx in the products after combustion. One of the prominent features is CO 2 Zero emissions. [0003] And straw is one of the most important biomass fuels. Originally, straws were burned directly, but due to their low energy per unit volume and low density (20-40Kg / m 3 ), inconvenient transportation, laborious and time-consuming problem...

AI Technical Summary

Problems solved by technology

[0004] However, the existing straw bales burning boilers cannot ensure that the straw bales are fully burned. The straw bales are naturally burned in the boiler by the air blower, which not only slows down the combustion speed, but also incompletely burns the straw. It cannot be fully absorbed, the thermal efficiency is low, and the existing straw baling boilers are generally equipped with blowers, induced draft fans, etc., and there are still disadvantages such as noise pollution and high electricity bills during operation.

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