JPH0146401B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for controllably metering a sticky slurry containing combustible components to a fluidized bed boiler.

Conventionally, there have been various difficulties in extracting highly sticky materials containing combustible components such as sewage sludge from hoppers and supplying them to treatment equipment due to their stickiness. Therefore, it has been difficult to treat this type of sticky sludge using conventional incineration methods, but the development of a fluidized bed furnace has made it possible to incinerate this type of low-calorie sludge and effectively utilize the amount of heat generated. It became possible to do so.

The purpose of this invention is to propose an apparatus for supplying a fixed amount of sticky slurry to be incinerated into a fluidized bed furnace.

In short, this invention comprises a belt-type transporter located at the bottom of the hopper, a sticky slurry delivery device comprising a drum with projections, an auxiliary delivery rotor, an intermediate transporter,
In the device for quantitatively supplying sticky mud to a combustion device using a sticky slurry quantitative supply device in sequence, the sticky substance quantitative supply device is a screw-type quantitative feeder, and is connected to the screw-type quantitative feeder. A fluidized bed type limestone powder feeding device is provided surrounding the upper part of the inlet hopper, and a rotary feeder for feeding limestone powder overflows the upper edge of the inlet hopper to form a limestone powder film on the inner surface of the inlet hopper. It is characterized by a sticky slurry quantitative supply device installed near the connection between the device and a hopper containing limestone powder.

The apparatus related to the implementation of this invention will be explained using FIG. 1 of the present application, which is the same as FIG. . (In addition, in FIG. 1 of the drawings at the time of this application, the slurry supply device 7e is not provided on the upper edge of the hopper connected to the quantitative supply device 10.) Sticky slurry (hereinafter simply referred to as slurry) is supplied from a storage facility to a hopper 2a of a sticky mud delivery device 2 having a belt type transporter 4 and a drum 3 with protrusions by an excavation machine 1 such as a backup or power shovel. The sent sludge is transported to a rotating drum 6 of a belt-type transporter 4.
The auxiliary delivery rotary body 5 is opposed to the
and then supplied to an intermediate transport device 9 such as a belt conveyor. The plate-shaped slurry 8 is supplied from the upper end of the intermediate transporter 9 to a hopper of a slurry quantitative supply device 10, which is a screw-type feeder, and is connected to a rotary blade located at the end of this quantitative supply device and an extrusion hole in an extrusion plate. The slurry is fed to the fluidized bed furnace 11 as a short rod of slurry, and is burned to generate hot water or steam through an evaporation tube.
Hot water or steam is then sent to the required location through the delivery pipe 11b. Note that the powder supply devices 7a, 7b, 7
From c and 7d, limestone powder is supplied to areas where the mud and the equipment should not stick together to prevent the mud from sticking to the equipment. This limestone powder combines with sulfur oxide SOx generated in the fluidized bed of the fluidized bed furnace and becomes CaSO ₄ etc., which is used to remove SOx so that the exhaust gas discharged via the damper 12a and the pipe 12 does not contain SOx. List the effects.

FIG. 2 is a detailed sectional view of section A in FIG. 1. The powder supply device 7a has a powder passage 13, and the limestone powder 14 is supplied to the rotary valve 1 located at the lower part of the powder supply device 7a.
5 and a nozzle portion 16 (which may be a long slit nozzle or a combination of a plurality of single tube nozzles) onto the surface of the belt 4a. The tip of a pressurized air pipe 17 is located within the nozzle portion 16 to ensure good dispersion of limestone powder onto the belt surface. Also, other anti-sticking powders may be used in place of limestone powder.

An apparatus according to an embodiment of the present invention will be explained with reference to FIG. The amount of plate-shaped sludge 8 sent out from the intermediate transporter 9 is made approximately equal to the amount of sludge discharged from the screw-type sludge quantitative supply device 10, and the plate-shaped sludge 8 is It is necessary to wind it directly into the screw while avoiding contact with the inner surface of the inlet hopper 10a. However, there is still a chance of contact with the inner surface of the inlet hopper, so a fluidized bed type limestone powder supply device 18 is positioned on the outer periphery of the upper end of the inlet hopper 10a. The hopper 19 is connected to the limestone powder supply device 18 and has a rotary feeder 19a at its lower part to supply a required amount of limestone powder. Flowing air is supplied through the valve 20a and the pipe line 20.
The limestone powder flows into the air chamber of the limestone powder supply device 18 via the limestone powder supply device 18 and fluidizes the supplied limestone powder. This fluidized limestone powder overflows from the upper end of the inlet hopper 10a and flows down to evenly cover and wet the inner surface of the inlet hopper 10a, even if the muddy material 8 comes into contact with the inner surface of the inlet hopper 10a. It can be fed directly into the screw without sticking. In this case, it is desirable to use limestone powder that passes through 70% of 200 mesh.

By carrying out this invention, intermediate transport machine 9
The sticky slurry supplied to the inlet hopper 10a does not stick to the inner surface of the inlet hopper 10a.
The movement amount of the slurry in each part of the screw-type fixed-rate supply device 10 is controlled to be constant, the amount of slurry sent out from the screw-type fixed-rate supply device 10 is precisely controlled, and At the same time, the amount of sludge delivered can be changed to suit this. This has the effect of making it possible to more precisely control the amount of slurry supplied by supplying limestone powder to prevent adhesion.

[Brief explanation of drawings]

Fig. 1 is a side view showing the arrangement of each device according to the present invention, Fig. 2 is a detailed sectional view of the device for supplying limestone powder in section A of Fig. 1, and Fig. 3 is a sludge quantitative determination. It is a longitudinal cross-sectional view of a supply device and a limestone powder supply device. 3...Drum with protrusions, 4...Belt type transport machine,
9... Intermediate transport machine, 10... Sludge quantitative supply device, 18... Fluidized bed type limestone powder supply device, 19
...Hotupa, 19a...Rotary feeder.

Claims (1)

[Claims] 1 A belt-type transport device located at the bottom of the hopper, a sticky slurry delivery device consisting of a drum with protrusions, an auxiliary delivery rotating body, an intermediate transport device, and a sticky slurry quantitative supply device are used in order to In the device for quantitatively supplying a sticky substance to a combustion device, the sticky substance quantitatively feeding device is a screw-type quantitative feeder, and a fluidized bed type limestone powder feeding device surrounds the upper part of an inlet hopper connected to the screw-type quantitative feeder. and a rotary feeder for supplying limestone powder that overflows the upper edge of the inlet hopper and forms a limestone powder film on the inner surface of the inlet hopper. A device for quantitatively supplying a sticky slurry.