Rotary grate device for organic solid waste

Abstract

The invention discloses a rotary grate device for organic solid waste. A furnace wall is arranged outside a hearth, a material inlet is formed in the top of the hearth, a smoke / synthesis gas outlet is formed in one side of the top of the hearth, a grate base is arranged at the bottom of the hearth, a rotary grate is arranged on the grate base, and a rotary ash discharging knife with an adjustable angle is arranged between the lower side of the rotary grate and the furnace wall; a slag falling opening is formed in the grate base, an ash tray is arranged between the lower portion of the grate base and the furnace wall, and a water-cooling slag discharging hopper is arranged in the center of the ash tray, and an opening is formed in the center of the grate base, extends downwards and is connected with an ash outlet formed in the outer portion of the furnace wall, and pivotal bearings are arranged among the grate base, the ash tray and the water-cooling slag discharging hopper. The rotary grate device is suitable for the organic solid waste which has the characteristics of large component fluctuation and difficult burn-off, and ensures that the organic solid waste has higher burn-off rate.

Description

technical field [0001] The invention belongs to the technical field of organic solid waste energy treatment, and in particular relates to a rotary grate device for organic solid waste. Background technique [0002] The stacking and treatment of organic solid waste such as domestic garbage, sludge, and waste biomass has brought serious pollution and harm to people's lives. How to properly manage it is one of the environmental problems that need to be solved urgently in our country. The energy utilization method represented by incineration / gasification method is currently the fastest growing organic solid waste treatment technology, which fully embodies the principles of harmlessness, reduction and resource utilization, and has been increasingly widely used. However, due to the characteristics of low calorific value, uneven particle size, and variable composition of organic solid waste, there are still some technical difficulties in the process of energy utilization of organic...

AI Technical Summary

Problems solved by technology

However, in the current rotary grate furnace, the turning and agitation of the fuel are mainly carried out by the rotation of the grate, and the slagging is also carried out by the rotation of the grate, so increasing the turning and stirring of the grate will inevitably increase the slag discharge. speed, resulting in unburned slag being discharged out of the furnace

[0005] (2) It is difficult to adjust the amount of ash discharged during the incineration / gasification process of organic solid waste

[0006] Also due to the complex and changeable composition of organic solid waste, low calorific value, and wide sieving particle size, the ash content of organic solid waste fluctuates greatly, and the design of incinerator / gasifier often requires fuel to have a relatively definite content. Ash content, and for the case of excessive fluctuation of ash content, it will often lead to fluctuations in the working conditions of the furnace

It may cause the ash discharge temperature to be too high or too low, and the carbon content of the ash discharge is difficult to guarantee

In the current rotary grate furnace, the slagging is regulated by the speed of the grate, but when the fuel is difficult to burn out and the agitation needs to be increased, the unburned fuel is often discharged out of the furnace, so it is necessary to design a new The slagging structure makes its slagging speed not only controlled by the grate speed

[0007] (3) The temperature of slag discharge after incineration / gasification is high, which makes the slag discharge machine difficult to lubricate and easy to get stuck

However, the lubricating oil of the rotating parts of the grate is often invalid due to the high temperature of solid waste slag discharge, so the lubrication of the rotating parts must be cooled to reduce the loss of lubricating oil

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