JPS6357685B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for controlling a device for supplying a sticky slurry containing combustible components to a combustion device.

Conventionally, there have been various difficulties in extracting highly adhesive materials from a hopper and supplying them to processing equipment due to the adhesive nature of the materials.

Recently, there has been a demand for the treatment of industrial waste such as mud and sewage sludge that contain combustible components, but due to their sticky, water-containing properties, it is difficult to treat them using conventional incineration methods. With the development of the fluidized bed furnace, it became possible to effectively utilize the calorific value of the combustible components contained in the fluidized bed furnace for incineration.

The purpose of this invention is to propose a device for controlling a device that supplies mud to a fluidized bed furnace.

In short, this invention is for supplying mud to a fluidized bed furnace, and stores a steam flow rate signal in a main steam pipe, a fluidized bed furnace exhaust gas temperature signal, and a fluidized bed temperature signal, and stores the signals during operation. The signals received are compared and sent to a control box that issues control commands, and the command signals from this control box are used to control the belt-type transporter, drum with protrusions, auxiliary rotating body, intermediate transporter, quantitative feeder, and powder supply device. A sludge supply control device that controls the operation of the sludge supply control device.

This invention will be explained below with reference to the drawings. The sludge is supplied from a storage area to a hopper 2a of a sludge delivery device 2 having a belt type transporter 4 and a drum 3 with protrusions by an excavating machine 1 such as a backpack or a power shovel. The delivered slurry is sent between the rotating drum 6 of the belt-type transport device 4 and the opposing auxiliary delivery rotating body 5 via the belt 4a, and then supplied to an intermediate transport device 9 such as a belt conveyor. The plate-shaped slurry 8 is fed from the upper end of the intermediate transporter 9 to the hopper of a quantitative feeder 10, which is a screw-type feeder, and passes through a rotating blade located at the end of this quantitative feeder and an extrusion hole in an extrusion plate. The slurry is supplied to the fluidized bed furnace 11 in the form of short rods of slurry, and is burned to generate steam through an evaporation tube, which is then sent to the required locations from the drum 11a through the main steam tube 11b. Incidentally, limestone powder is supplied from the powder supply devices 7a, 7b, 7c, 7d, and 7e to the places where the mud and the equipment come into contact to prevent the mud from sticking to the equipment. This limestone powder combines with sulfur oxides (SOx) generated in the fluidized bed to form _CaSO4 , etc., and is effective in removing SOx.

In this invention, an exhaust gas thermometer for a fluidized bed furnace is used.
A circuit is provided to send temperature signals from T ₁ and the fluidized bed thermometer T ₂ and a main steam flow rate signal from the steam flow meter SF to the control box 13. This control box 13 is a device that can store pre-input data, compare it with the numerical values of the sent signals, and issue command signals to necessary devices.

The numerical values obtained from the temperature signal and the steam flow rate signal are compared with the stored data, and the required amount of slurry to be supplied per unit time is calculated in the control box. This result is used as a command signal to perform the necessary operations such as the belt-type transporter 4, the drum with projections 3, the auxiliary delivery rotor 5, the intermediate transporter 9, the quantitative feeder 10, and the powder supply devices 7a, 7b, 7c, 7d. , 7e, and are controlled to achieve the respective commanded rotational speeds and powder supply speeds.

As for the fluidized bed furnace 11, the amount of combustion air supplied is controlled by the control damper 11e and the exhaust gas damper 1 as in a normal boiler based on the main steam flow rate, that is, the load signal.
Necessary valves or dampers such as 2a and water supply flow rate control valve 11d are controlled to operate as instructed.

A microcomputer can be built into the control box.

It is also possible to measure the calorific value of the sludge and input the results into the control box.

By implementing this invention, the supply of slurry containing combustible components to the fluidized bed furnace can be made according to the load, and is automatically controlled, reducing the burden on operators and reducing operating costs. It has various effects such as reducing the amount of water used.

[Brief explanation of the drawing]

FIG. 1 is a drawing showing the arrangement and wiring system of the device according to the present invention. DESCRIPTION OF SYMBOLS 1... Excavation machine, 2a... Hopper, 3... Drum with protrusion, 4... Belt type transporter, 5... Auxiliary delivery rotary body, 9... Intermediate transporter, 10... Fixed quantity feeder, 11... ...Fluidized bed furnace, 13...Control box, T ₁ ...
...Exhaust gas thermometer, T ₂ ...Fluidized bed thermometer, SF...
Steam flow meter.

Claims (1)

[Claims] 1. A hopper 2a with an open bottom end for storing muddy material;
A belt-type transporter 4 whose surface for conveying the slurry is in contact with the lower edge of the hopper, and a powder supply device located near the lower edge of the hopper at the rear end of the belt-type transporter in the direction of belt movement. 7a, a drum 3 with a protrusion connected to the side wall of the hopper 2a on the side in the belt movement direction, and a powder supply device 7b located near the front wall of the hopper on the upper surface side of the plate-shaped slurry sent out from the hopper 2a. 7c, an auxiliary delivery rotary body 5 which pinches and transfers the plate-shaped mud material sent out from the hopper, and the auxiliary delivery rotary bodies 5, 6 on the lower surface side of the plate-shaped mud material sent out from the hopper.
a powder supply device 7d located in the vicinity of , an intermediate transporter 9 that sends and moves the sent-out plate-shaped slurry upward, and a metering device that supplies the slurry to the fluidized bed furnace 11 in the form of short rods. A feeder 10, a powder feeder 7e located above the opening of the hopper that receives the plate-like slurry of the quantitative feeder, a thermometer _T2 provided in the fluidized bed section of the fluidized bed furnace, and a fluidized bed. A thermometer _T1 provided in the exhaust gas pipe of the furnace; a steam flow meter SF connected to the main steam pipe 11b of the steam sent from the drum 11a of the boiler that generates steam by the fluidized bed furnace;
In the apparatus for controlling a device for treating sludge consisting of
The signal from the exhaust gas thermometer T ₁ and the signal from the thermometer T ₂ that measures the temperature of the fluidized bed are stored in correspondence with the steam flow rate and are compared with the signals received during operation to issue control commands. A control box 13, a belt-type transporter 4, a drum with protrusions 3, an auxiliary delivery rotor 5, an intermediate transporter 9, a quantitative feeder 10, and a powder supply device that are controlled in response to command signals issued from the control box 13. A slurry supply control device comprising: 7a, 7b, 7c, 7d, and 7e.