Single-spiral flow smokeless steam boiler with chain grates

Abstract

This invention relates to a single-chain grate swirl pure smoke-free hot water boiler which belongs to thermal equipment. It includes the shell, water wall, drum and lower coal-fired device. The coal-fired device includes the coal installation; the chain stove arranges upper coal, the stokehold push and pushes behind the stove. Front furnace chamber is composed between the stokehold arch and the chain stove row. Queen furnace chamber is composed between pushes behind the stove and the chain stove row. The top of the front furnace chamber's surface form the arch by the whorl stream burning. The oblique tones wall of the furnace chamber matches the combustion-supporting place with draught that leads to the front furnace. The combustion-supporting place with draught is tangent with the front furnace chamber top arch, and the back of furnace chamber is connected in the front burning hot gas outlet. The structure is simple reasonable, and low cost, full combustion, high thermal efficiency, low energy consumption, solved black smoke fouling problems, protection of the environment.

Description

Technical field [0001] The invention relates to a chain grate type single swirling pure smokeless steam boiler, which belongs to thermal engineering equipment. Background technique [0002] At present, the chain grate steam boiler is a series of products of the DZL model that has been vigorously promoted in the country and has more advanced performance. The structure includes a shell, a water wall, a drum and a lower coal-burning device. The coal-burning device includes a coal loading device, The chain grate, the front arch and the back arch of the furnace, the front hearth is formed between the front arch of the furnace and the chain grate, the back hearth is formed between the back arch of the furnace and the chain grate, and there is combustion heat between the front arch and the back arch of the furnace The gas outlet, the overall layout is firm and compact, and has a high heat transfer coefficient. The rated evaporation capacity ranges from DZL0.5-DZL20, that is, the rated e...

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Problems solved by technology

[0003] In order to improve the heat transfer efficiency in the design of the "pot" of this boiler product, the flue gas adopts the "smoke pipe three-circuit program" structure in the drum during operation, which has a long heat exchange process and a dense contact area. The "smoke pipe" that must pass through the gas is distributed inside the drum, and the inside of the drum is full of water except the upper layer is steam, so the temperature of the flue gas will drop rapidly during the process, and the tar in the flue gas will The steam will condense and precipitate out quickly, and a large amount of dust will stick to it at the same time. The pipes are very thin and consist of a group of several pipes, so they are easy to "block up", resulting in poor smoke exhaust from the whole equipment, and the boiler "burns positive pressure" to spray smoke everywhere. That is to say, if the steam output cannot reach the rated pressure, it will cause serious oxygen deficiency in the combustion part, black smoke from the chimney, and more serious and rapid "blockage", fuel consumption will also increase rapidly, and the boiler room will be filled with black smoke, which is harmful to the environment. serious pollution

Although a special tool called "smoke pipe brush" is designed for this purpose, the production and furnace are stopped regularly for cleaning, but because most of the pipes are too thin and too long, it is difficult to remove the tar dust mixture after cooling, so this kind of boiler In the process of operation, there is a lot of energy waste, low thermal efficiency, and serious environmental pollution

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