Garbage incinerator capable of measuring garbage thickness and method for measuring garbage thickness

Abstract

The invention relates to a garbage incinerator capable of measuring garbage thickness. The garbage incinerator comprises a combustion air pipeline, a combustion chamber and a multistage furnace grate, wherein the combustion air pipeline is communicated with the combustion chamber and an air supply chamber is also arranged between the combustion air pipeline and the combustion chamber. The garbage incinerator also comprises a flowmeter for measuring air flow in the combustion air pipeline, a differential pressure transmitter for measuring the pressure difference between the combustion chamber and the air supply chamber, and a data processing unit which converts readings to required pressure data and flow data. The method for measuring garbage thickness in the garbage incinerator comprises the following steps: obtaining a garbage thickness value k by virtue of the function y=nkx according to the air flow data x(kPa) of the combustion air pipeline and the pressure difference data y(km3 / h) between the combustion chamber and the air supply chamber; and comparing x1 and y1 in real-time measurement, where x1 / y1=k1, and if k1 is larger than nk, the garbage thickness is large, and otherwise the garbage thickness is small; and thereby adjusting garbage feeding and multistage furnace grate speed.

Description

technical field [0001] The invention relates to the field of domestic garbage incineration, in particular to a garbage incinerator capable of measuring the thickness of garbage and a measuring method thereof. Background technique [0002] At present, the composition of municipal solid waste in my country is complex and its calorific value is relatively low, which easily leads to unstable combustion conditions of waste incinerators. In the case of low calorific value of waste, the main factor affecting the stable combustion of the incinerator is whether the thickness of the grate waste is appropriate. If the thickness is thinner, the processing capacity of the incinerator will not reach the designed treatment, less heat will be generated, the furnace temperature will be lower, and the amount of steam and power generation will be lower; if the thickness is thicker, the drying effect of the garbage will be worse, and the garbage will be Unable to burn normally, resulting in a ...

AI Technical Summary

Problems solved by technology

If the thickness is thinner, the processing capacity of the incinerator will not reach the designed treatment, less heat will be generated, the furnace temperature will be lower, and the amount of steam and power generation will be lower; if the thickness is thicker, the drying effect of the garbage will be worse, and the garbage will be Unable to burn normally, resulting in a sudden drop in furnace temperature, and the heat reduction rate is not up to standard, which affects the normal operation of the incinerator

[0003] At present, domestic incinerators mainly rely on the furnace flame monitor to monitor the thickness of garbage, and observe the combustion status and garbage thickness in the furnace through video. Due to the installation position of the flame monitor, high temperature in the furnace, and large dust, the eyes The thickness of the garbage you see is the thickness of the garbage that has been burned. When the thickness changes significantly, basically the operating conditions of the incinerator have fluctuated significantly. At this time, adjusting the speed of the grate and feeder can no longer solve this problem in time.

Especially when the density of the garbage changes, the actual thickness of the garbage sent in does not change significantly at the same grate and feeder speed, but the combustion conditions will change drastically, so the thickness of the garbage is currently detected by the flame monitor This method cannot control the thickness of garbage and maintain stable working conditions. This is also one of the main factors that most domestic incinerator equipment suppliers cannot automate the combustion control of garbage incinerators.

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