JPS59129316A - Dust feeding control device in refuse incinerater - Google Patents

Abstract

PURPOSE:To feed dust under its best suited condition for drying grids by a method wherein a dust feeder is controlled in response to sensed values of pressure below the drying grids and volume of air to be fed below the drying grids. CONSTITUTION:A differential pressure is taken out through a differential pressure signal transmitter 20 from a pressure gauge 17 for detecting pressure in a furnace and a pressure gauge 18 for detecting pressure below grids. In turn, a value of the air flow meter 19 below the grids is detected and a signal is generated from a control device 23 to an operating device 24 for a dust feeding device 16 in reference to a value calculated by an air passage resistance calculater 21. That is, in case that the dried grids show high air passage resistance above and below the grids, this means that there are large amount of dusts or the dusts contain large amount of moisture and generates a signal for terminating the dust feeding device 16. In turn, in case that a low air passage resistance is found, this means that less volume of dust is found in the drying grid or dusts are dried, so that a signal for operating the dust feeding device 16 is generated. Thereby, it is possible to feed the dust under the most suited condition for the drying grids.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to combustion control in a waste incinerator. As shown in FIG. 1, the garbage incinerator that is the object of the present invention accumulates collected municipal garbage from a platform 1 into a garbage pit 1 2 and then burns it in the incinerator. The garbage in ~2 is gripped and carried by a grab 4 and thrown into the hopper ~5.The garbage thrown into the hopper 5 falls onto the grate in the incinerator and is burned.

The side of the grate near the hopper 5 is called a drying grate 6, which controls the drying of the waste and causes the waste to be oscillated to the next stage of combustion grate. The combustion grate next to the drying grate 6 is a front combustion grate 7 and a rear combustion grate 8. The combustion scum generated in the combustion chamber 9 passes through a boiler 1o, is cooled, is removed by an electric precipitator 11, and is discharged through an induced blower 12 through a chimney 13. There is a popper for discharging ash under the grate, and the ash is discharged into an ash bit 15 by an ash discharging conveyor 14.

On the other hand, the combustion air is fed in steps C so that it passes through the grate from the bottom to the top of the grate.

Conventionally, in a waste incinerator, the operation manager can check the condition inside the furnace by checking the temperature fit iP3 installed inside the furnace and visually observing the outside of the furnace.
Observe the temperature inside the furnace, the J9 size of the garbage on the drying grate 6 and the combustion hole 48, and the properties of the garbage, understand the combustion status of the garbage, and adjust the dust feed skewer and grate feeding hanging. Was.

With the development of these power-burning Kl furnaces, means are being developed to automatically control and control the incineration in the Jt. One such means is The degree of waste flow can be varied by changing the negative part of the grate.

However, when the @bank of the garbage on the drying grate changes (]/ζ the properties of the garbage change, the flow velocity of the garbage on the drying grate changes. For example, low n garbage with a high moisture content is input Although it is desirable to spend a good amount of time on the dry grate, if the dynamic P level of the dry grate was kept constant, a thick layer of dirt would form on the combustion grate -V. Regarding garbage incineration, 'Lj' caused problems with incineration.
As a prior art, there is C.Toku 17tl Publication No. 51-20481. What is described in this publication measures or estimates the thickness of the layer of dust on the combustion grate, and uses the measured value or estimated value iM to prevent the layer thickness from becoming extremely thick. Zuruyaki k characterized by controlling at least one of the child drive device and the air supply device.
] A furnace control device is described. The present invention has been developed in such a garbage incinerator so that the garbage can be fed to the garbage drying grate in the best condition and burned.

The present invention is equipped with a dust supply device at the lower end of the hopper that feeds the waste to feed the waste onto the drying grate, a pressure h1 for detecting the pressure inside the incinerator is provided above the grate, and a A flow meter is installed to detect the pressure S1 and the amount of air fed under the drying grate. It was designed to do so.

The present invention will be described in detail with reference to the drawings below. FIG. 2 shows a combustion '99 and a fire grate, and a dust feeder 16 is provided at the lower end of the hopper 5. There is a pressure gauge 1 inside the furnace to detect the furnace internal pressure.
On the other hand, under the drying grate 6 there is a pressure meter 18 for detecting the air under the grate, and in the air flow path there is a flow fi fi+ 19 for detecting the air flow rate under the grate.

Next, we will explain the operating situation of the present invention.As shown in FIG. The differential pressure is taken out by
(The ventilation resistance calculator 21 calculates 4', and the dust supply device 16 is created from the 0 control device 23.
I will save you money. In other words, if the ventilation resistance of the drying grate is large (Fσ), it means that there is a lot of garbage or moisture, and a signal is issued to stop the dust supply system M. On the other hand, if the ventilation 11 or 18 is small, the dust in the drying stage 10 m)) As a method of commanding the actuating device 24 using the control device 23h1 and θ) signals, the dust feeding skewer is operated by operating the jFt command for stopping or starting the feeder feeder by -A turn OFF like 'tier; hoσ). To adjust (strain method and grate) - detect the differential pressure below and the amount of air supplied and calculate the ventilation resistance (
There is also an lfi dust supply device stop timer, which is the same, or a method that continuously adjusts the dust supply device operating method.

The present invention adds (=1) to the comprehensive control that detects the dryness in the furnace of the komi-burning U1 furnace and controls the operation of the grate and the amount of combustion air supplied. Conventionally, incomplete combustion may occur depending on the dryness of the waste,
The drawback that the supply of garbage is too small depending on the combustion conditions has been completely resolved, and the goal 1. It can be used as a heat source for boilers.

, 4. Brief description of the drawings Figure 1: G: A side sectional view of the trash incinerator, Figure 2: An enlarged side sectional view showing a part of the trash incinerator, and J: Controls for explaining the present invention. No example phylogenetic diagram shown.

1... Grab 1 ~ Home, 2... Garbage bit, 3...
...Garbage crane, 4...Grab, 5...Popper, 6...Drying grate, 7.8...Combustion grate, 9.
...Incineration, Furnace, 10...Boiler, 11...Electrostatic precipitator, 12...Induced blower, 13...Chimney, 14
...Ash amount conveyor, 15...Ash bit, 16...
Dust supply device, 17.18・zu1-force old,] 9... Diversion old, 20... Difference It transmitter, 21... Ventilation resistance calculator, 22... Setting device, 23...・Control device, 24...
Working wave interval.

Special 8' [Name of applicant's agent] Valve 111 corner

Claims (1)

[Claims] In a garbage incinerator 1lII furnace that includes a hopper for supplying and covering garbage, a drying grate for drying the supplied garbage, and a combustion grate for burning the dried garbage, the hopper 1;
A dust supply device U is provided at the end of the drying grate to feed the waste onto the drying grate, and a pressure J1 for detecting the pressure inside the furnace is provided above the grate, and a pressure J1 is provided below the drying grate to The pressure h1 that detects the air pressure being fed and the flow meter that detects the air pressure are connected to each other.
'J, said) 1-A to the waste incineration furnace characterized by controlling the dust supply device according to the detection value of the force cutting and 'flow meter.
5U dust supply control wave.