Classification and characteristics of industrial waste incinerators

The industrial waste incinerator integrates active feeding, screening, drying, incineration, ash cleaning, dust removal, and active control. Adopting high-tech measures such as high-temperature incineration, secondary oxygenation, and active slag unloading to meet the monitoring requirements for pollution discharge.

The use and development of waste incineration skills in foreign countries have a history of several decades. Compared to mature furnace types, there are pulse throwing grate incinerators, mechanical grate incinerators, fluidized bed incinerators, rotary incinerators, and CAO incinerators. Below is a brief introduction to these furnace types.

Pulse throwing grate industrial waste incinerator

Working principle: The waste is fed into the drying bed of the incinerator through the active feeding unit for drying, and then sent to the first level grate. After high-temperature evaporation and cracking on the grate, the grate is propelled by pulse air power equipment to throw the waste into the next level grate step by step. At this moment, polymer substances are cracked and other substances are incinerated. Continue like this until it is finally burned out and enters the ash pit, where it is discharged by the active slag removal equipment. The combustion air is sprayed into the air through the pores on the grate and mixed with the waste for incineration, causing the waste to suspend in the air. The substances evaporated and cracked enter the second stage incineration chamber for further cracking and incineration, while the unburned flue gas enters the third stage incineration chamber for thorough incineration; High temperature flue gas is heated by steam on the heating surface of the boiler, and together with the flue gas, it is cooled and discharged.

Mechanical grate industrial waste incinerator

Working principle: Waste enters the skewed downward grate through the feeding hopper (grate is divided into dry area, incineration area, and burnout area). Due to the interweaving motion between the grates, the waste is pushed downwards, causing the waste to pass through various areas on the grate in sequence (when waste enters from one area to another, it has a big turning effect), until it is burned out and discharged from the furnace. Incineration air enters from the lower part of the grate and mixes with waste; High temperature flue gas generates hot steam through the heating surface of the boiler, and together with it, the flue gas is also cooled. Finally, the flue gas is treated by the flue gas treatment equipment and discharged.

Fluidized bed industrial waste incinerator

Working principle: The furnace body is composed of porous distribution plates, and a lot of quartz sand is added to the furnace. The quartz sand is heated to above 600 ℃, and hot air above 200 ℃ is blown into the furnace bottom to make the hot sand lively, and then waste is added. Waste thrives together with hot sand, and is quickly dried, caught fire, and burned. The proportion of unburned waste is relatively light and continues to be incinerated. The proportion of burned waste is relatively high and falls to the bottom of the furnace. After water cooling, coarse and fine slag are sent to the outside of the plant using sorting equipment. A small number of medium slag and quartz sand are sent back to the furnace for continuous use through improved equipment.

Rotary industrial waste incinerator

Working principle: A rotary incinerator is a furnace that uses cooling water pipes or refractory materials to be placed along the furnace body, with the furnace body horizontally placed and slightly skewed. Through continuous operation of the furnace body, the waste in the furnace body is fully incinerated and moves towards the skewed direction of the furnace body until it is burned out and discharged from the furnace body.

CAO Industrial Waste Incinerator

Working principle: The waste is transported to the storage pit, enters the biochemical treatment tank, and dehydrates under the microbial effect, causing natural organic matter (kitchen waste, leaves, grass, etc.) to decompose into powder. Other solid components such as plastic and rubber, as well as inorganic substances in the waste, cannot decompose and pulverize. After selection, the waste that cannot be pulverized enters the first incineration chamber of the incinerator (at a temperature of 600 ℃), and the combustible gas generated enters the second incineration chamber. The non combustible and non pyrolysis components are discharged in the form of ash in the first incineration chamber. The temperature of the second room is controlled at 860 ℃ for incineration, and the high-temperature flue gas heats the boiler to produce steam. After treatment, the flue gas is discharged into the atmosphere through the chimney. The metal glass in the top incineration room will not oxidize or melt, and can be sorted and recycled in the ash.