Efficient burning furnace with rotary fluidization grate

Abstract

The invention relates to an efficient burning furnace with a rotary fluidization grate. The burning furnace with the rotary fluidization grate consists of a feeding system, a burning system and a slagging system; moreover, a waste heat boiler and a flue gas treatment system are connected with the burning furnace to form a complete garbage burning and generating system. The feeding system consists of a feeding hopper, a pre-drying conveying device, an aggregate bin, a chute and a charge distributor. The feeding hopper is a receiving opening for feeding garbage into the burning furnace and is arranged in a garbage storage pit close to one side of the burning furnace. An outlet of the feeding hopper is connected with an inlet of the pre-drying conveying device. A material level switch is arranged in the feeding hopper, and gives an alarm to prompt an operator to feed materials when the material level is lower than a set value so as to ensure that the hopper is not empty. The outlet of the hopper can be selectively provided with a feeding device. The burning furnace has the advantages of high burning speed, high burning efficiency, high slag burning degree, easy control, lower energy consumption, low pollution, low cost and investment conservation, and is applicable to domestic garbage with low thermal value and high moisture; and the garbage does not need to be pretreated.

Description

Technical field: [0001] The invention relates to a high-efficiency rotary fluidized grate incinerator used for incinerating garbage, capable of preheating and drying the garbage, continuously feeding materials through mechanical transmission, and realizing multi-layer suspension fluidized combustion. Background technique: [0002] The incinerator technology of modern domestic waste is divided into four categories according to the furnace type: grate furnace, rotary kiln furnace, fluidized bed furnace and gasification furnace. Bed furnace. [0003] The main body of the grate furnace is a mechanical grate. According to the movement mode of the mechanical grate, there are reciprocating type, drum type, and shaking type. Or tumbling to enhance the contact degree between the garbage and the combustion-supporting air, and increase the burning speed of the garbage. Its advantages are: strong adaptability to garbage with different calorific values ​​and shapes, and no need to sort...

AI Technical Summary

Problems solved by technology

Disadvantages are: feed at intervals; garbage piles up and burns in layers, and the burning speed is slow; it is difficult to control the furnace temperature; it is easy to produce toxic gases; it is difficult to burn domestic garbage with high moisture and low calorific value without combustion support

The disadvantages of the rotary kiln are: low thermal efficiency, need to consume more auxiliary fuel; the temperature of the exhaust gas is low, there is a foul smell, it needs a deodorization device or a high-temperature post-combustion chamber for incineration; the kiln body is long and occupies a large area; the cost is high, more expensive

The disadvantages of the fluidized bed are: the bottom of the furnace needs high-pressure air distribution, high energy consumption, and a large amount of dust in the flue gas; the requirements for the particle size and uniformity of the waste entering the furnace are relatively high, and a crushing device is required; quartz sand wears out the equipment, and the equipment Regular maintenance is required; coal or oil is required to support combustion, the operation is complicated and the operation cost is high

[0006] The combustion methods of the above three furnace types have their own characteristics. The grate furnace and the rotary kiln basically belong to the stacked layer combustion technology, and the combustion efficiency is not high. The fluidized bed furnace belongs to the fluidized suspension combustion. According to the analysis of the combustion theory, the The fluidized suspension combustion technology can make the garbage fully contact with the air, so the combustion efficiency is the highest. However, the shortcomings of the fluidized bed furnace structure limit its development in the direction of high efficiency, low energy consumption and low cost.

[0007] Among the patents of waste incinerators disclosed recently, there are also many patented technologies for suspension combustion, such as: invention patent 03266362.5, invention patent 95223921.3, invention patent 95223923.X, etc. These patented technologies are only improvements to suspension combustion technology from different angles , but neither formed fluidized combustion, and thus did not improve combustion efficiency more effectively

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