Fluidized bed heat energy center of low-heat-value fuel for combustion and using method of fluidized bed heat energy center

Abstract

The invention discloses a fluidized bed heat energy center of low-heat-value fuel for combustion and a using method of the fluidized bed heat energy center. The fluidized bed heat energy center comprises a three-return-stroke hearth; the bottom of the three-return-stroke hearth is connected with an isobaric air chamber through a small hood air distribution plate; the lower portion of the three-return-stroke hearth is provided with a feeding pipe, a high-position buried pipe and a material return opening; the top of the three-return-stroke hearth is provided with a water cooling wall upper header which communicates with a boiler barrel through a steam guide pipe; an outlet of the three-return-stroke hearth communicates with a tail vertical shaft through a horizontal flue bent; a conductionoil heating device and a bypass flue are vertically and parallelly distributed on the tail vertical shaft; an inlet of the bypass flue is provided with an adjusting baffle, and an outlet of the bypassflue is connected with a fresh air device; a lower outlet of the tail vertical shaft communicates with a volute separator through a downdip flue; and an outlet of the volute separator communicates with a drying production line through a connection flue. Through the fluidized bed heat energy center of the low-heat-value fuel for combustion and the using method of the fluidized bed heat energy center, the equipment investment and operation cost can be reduced, system adjusting is easy, convenient, safe and reliable, original NOX emission of equipment is low, and the flue gas up-to-standard discharge environmental protection operating cost is reduced.

Description

Technical field [0001] The invention belongs to the technical field of thermal energy equipment for (wood processing) man-made density fiberboard enterprises, and specifically relates to a fluidized bed thermal energy center burning low-calorific value fuel and a use method thereof. Background technique [0002] The artificial density fiberboard production line mainly uses steam, hot oil and hot air as heat carriers. There are two situations in which enterprises are equipped with thermal energy centers. [0003] One is to configure three independent heat sources: such as figure 2 Shown are fixed grate hot blast stoves, chain grate thermal oil boilers, chain or reciprocating grate steam boilers. Each equipment system operates independently. [0004] The second is to configure a chain or reciprocating grate incinerator combustion system, such as image 3 As shown, after the hot flue gas is generated, it is divided into three parts for heating. One part of the hot flue gas is used to ...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned thermal energy center adopts the grate layer combustion technology, and can only burn high-quality bituminous coal (mixed with low calorific value sawdust waste from the production line of the enterprise), and the fuel cost is high

Each equipment system operates independently or each part requires independent adjustment, and the equipment occupies a large area; there are many operators and high labor costs

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