JPH0318429Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is used in pyrolysis incinerators, drying equipment for sludge incineration, fluidized reactors, etc., while preventing gas from blowing out in the furnace or container. The present invention relates to an inclined conveyance device that can smoothly supply food.

(Prior art) In processing equipment such as pyrolysis incinerators, drying equipment for sludge incineration, or fluidized reactors, a screw feeder is generally connected horizontally to the wall on the inlet side of the furnace body or machine body. We try to supply materials in appropriate amounts.

This is illustrated in Fig. 3 for a pyrolysis type incinerator that processes municipal waste, industrial waste, etc. The lower half of the furnace body 1 is separated by a partition wall 2 into a pyrolysis section 1a and an incineration section 1b. The upper part of the thermal decomposition part 1a is divided into two parts, and the upper part is a secondary combustion part 1c.A screw feeder 3 is horizontally connected to the upper part of the side wall of the pyrolysis part 1a. The processed material is fed into the pyrolysis section 1a, where it is mixed with a heating medium such as sand that is fluidized by steam and air blown in from the bottom, and is pyrolyzed. The gas and tar generated there are burned in the upper secondary combustion section 1c, and the carbon overflows from the upper part of the partition wall 2 together with the heat medium and moves to the combustion section 1b.
It is combusted with combustion air blown in from below, taken out from the outlet 4 along with the exhaust gas from the secondary combustion section 1c, and the heated heat medium returns to the pyrolysis section 1a from the bottom. .

(Problem that the invention aims to solve) Incidentally, in the above-mentioned incinerator, the inside of the furnace is operated at a pressure higher than 1 atmosphere, and the pressure inside the furnace fluctuates depending on the combustion state, thermal decomposition state, etc. In this case, the pressure inside the furnace acts to push back the material to be processed in the horizontal feeder, but since there is no force acting on the material to counteract this, Gas blows back, making it impossible to supply the processing material smoothly. In addition, when the supply amount decreases and the upper space of the feeder comes into communication with the inside of the furnace, the gas inside the furnace dissipates into the atmosphere.

This phenomenon also occurs in sludge dryers where steam accumulates in the fuselage, fluidized reactors that involve blown gas and heat, etc.

In this case, it may be possible to install a surge hopper with a certain volume and multiple gate members between the horizontal feeder and the furnace or machine body to prevent the gas from blowing back and the material from scattering, but this method would require larger equipment. In addition, a control means for opening and closing a plurality of gate members in synchronization with the feeder is required, making the device complicated and expensive.

Therefore, the object of this invention is to provide a conveyance device that does not require any extra control means and can effectively prevent internal gas from blowing back with a simple configuration.

(Means and effects for solving the problem) Based on the above purpose, this invention is designed to be installed at the rear of the hopper as a conveying device that supplies treated materials such as municipal waste and industrial waste to a processing device such as an incinerator. An inclined gutter consisting of an inclined outer semi-cylindrical wall and an inner semi-cylindrical wall is integrally provided, an inlet opening is provided at the lower end of the inner semi-cylindrical wall, and a pressure higher than 1 atmosphere is provided at the upper end of the outer semi-cylindrical wall. An outlet opening connected to a processing device having an atmosphere is provided, a screw feeder is rotatably disposed inside the inclined gutter, and the hopper is placed above the inlet opening of the inclined gutter to reduce the pressure of the atmosphere in the processing device. While making the size so that the gravity of the processing material can be secured, the inclination of the screw feeder is
When the amount of processed material in the hopper decreases, the processed material remains in a closed state between the inlet opening and the outlet opening inside the sloping gutter, and the screw feeder idles, as described above. The screw feeder is kept in its final rotation to prevent the material to be processed from being transferred due to the idling phenomenon of the feeder caused by the relative relationship between the quality and quantity of the material in the hopper and the inclination angle of the screw feeder. As a result, the stagnation in the feeder and the stagnation in the hopper caused by the above-mentioned processing material closes the gap between the furnace gas and the outside air.

Then, the material to be processed is continuously fed into the hopper by the conveyor, and when it reaches a predetermined height, that is, the height at which the idling phenomenon of the screw feeder is eliminated, the idling phenomenon of the screw feeder stops.
The transfer action of the processing material resumes, and the processing material sequentially enters the inclined gutter from the inlet opening, is transferred upwards, reaches the outlet opening slightly beyond the above height, and is supplied from there to the processing equipment side. On the other hand, if the supply of material to the hopper runs out, the material in the hopper is continuously moved by the feeder,
Furthermore, when the amount decreases to a certain level, the screw feeder idles and the material remains in the apparatus in a closed state.

By the way, when the material to be processed is transferred upwardly by the inclined screw feeder as in this invention, as the inclination angle of the feeder is increased, at a certain inclination angle related to the repose angle of the transferred material, Even when the feeder rotates, a phenomenon occurs in which the feeder rotates idly without any transfer action occurring.

Therefore, regarding the method of determining the inclination angle of the screw feeder of this invention, the processing material supplied to the screw feeder is a mixture of many types of materials, which are cut into pieces in advance and then integrated into one piece. First, the effective angle of repose, which is the average or a certain range of the material to be processed, is determined, and based on this angle of repose, the material to be processed, which has its own weight, is filled into the hopper. The inclination angle of the screw feeder is determined so that the charging pressure counteracts the gas pressure in the furnace, in other words, a plugging effect is achieved.

By arranging the screw feeder in this way, it is possible to safely continue supplying processing materials into the furnace while reliably sealing the furnace gas pressure, which has a pressure higher than 1 atmosphere, and to supply the material during safety. Easy to stop.

(Embodiment) An embodiment of this invention will be described with reference to FIG. The front part is provided with an input port 11a, and the rear part of the hopper has an outer semi-cylindrical wall 12a forming a part of the inclined rear wall and an inner semi-cylindrical wall 12b which is inside the hopper and is inclined equally to the outer semi-cylindrical wall 12a. A screw feeder 13 is disposed inside the inclined gutter 12, and its rotating shaft 13a is pivotally supported through the top and bottom walls of the hopper 11. The drive device 14 is located at the upper and lower ends.
a, 14b are attached. However, if the device is small, it is only necessary to attach it to one side.

The lower end of the inner semi-cylindrical wall 12b of the gutter 12 is cut to a required width to form an inlet opening 12c, and the upper end of the outer semi-cylindrical wall 12a is also cut to a required width to form an outlet opening 12d. The outlet opening 12d is provided with a downward outlet pipe 12e, and the hopper 11 and the gutter 12 are connected to the outlet pipe 1.
It is connected to the inlet of the furnace body or machine body F of the processing apparatus via 2e.

The hopper 11 is placed at the upper part of the inlet opening 12c of the inclined gutter 12 at a material insertion height where the inlet opening 12c is subject to a gravity greater than the pressure of the atmosphere in the processing apparatus acting on the upper surface of the material to be processed in the gutter 12. It is large enough to ensure a sufficient amount of H.

Furthermore, the inclination angle θ of the inclined gutter 12, that is, the screw feeder 13 with respect to the horizontal plane is
When the processing material inside decreases, the reduction stops at the upper end of the inlet opening 12c of the inclined gutter 12, and the processing material in the feeder 13 reaches the outlet opening 12.
Until d, the stopper remains closed, and even if the feeder 13 rotates, the material to be processed is not conveyed, and the inclined gutter 1
The angle is such that the inside of 2 does not become empty, and it varies depending on the powder of the material to be processed, but for example, if the angle of inclination is large such as wood chips, it should be around 75°, or if the angle of inclination is small such as dry sludge. in case of
It can be tilted at about 15 degrees. The outlet opening 12d of the inclined gutter 12 is provided above the material insertion height H.

Although FIG. 2 shows the planar shape of the hopper 11, it may be square as shown in FIG. 2 or circular as shown in FIG.

Based on the above configuration, the material to be processed is continuously fed into the hopper 11 from the feed port 11a by the conveyor, and when it reaches a predetermined height, the drive device 14
The screw feeder 13 rotates at a predetermined speed by operating both or one of a and 14b,
Due to the rotation of the feeder 13, the material to be processed enters the inclined gutter 12 sequentially from the inlet opening 12c, is moved upward, reaches the outlet opening 12d slightly exceeding the material insertion height H, and is removed from the outlet pipe. 12
e and is supplied into the body F of the processing device.

During this work, the inside of the hopper 11 and the inclined gutter 1
2 is filled with processing material, and the inlet opening 1
Since gravity is greater than the pressure of the atmosphere inside the processing device 2c, even if the atmospheric pressure acts on the surface of the material in the inclined gutter 12, the atmospheric gas will not scatter the material and blow out.

On the other hand, if the material to be processed is no longer supplied to the hopper 11, the material contained in the hopper 11 will be sent to the processing equipment side by the screw feeder 13, and the material contained in the hopper 11 will be sent to the processing equipment side by the screw feeder 13. The material in the hopper 11 gradually decreases as shown in
When the material to be processed reaches the upper end of the inlet opening 12c of the inclined gutter 12, the material to be treated stagnates in the inclined gutter 12 in a closed state due to the idling phenomenon of the screw feeder 13.

In this case, the processing material remains at the bottom of the hopper 11 and the processing material is present in the inclined gutter 12 at about the material insertion height H, and the presence of such processing material causes the inside of the processing equipment to This will block the gas from blowing out.

(Effects of the invention) As described above, this invention uses an inclined outer semi-cylindrical wall and an inner semi-cylindrical wall at the rear of the hopper as a conveying device for supplying processed materials such as municipal waste and industrial waste to processing equipment such as incinerators. An inclined gutter consisting of a cylindrical wall is integrally provided, and an inlet opening is provided at the lower end of the inner semi-cylindrical wall, and an outlet connected to a processing device having an atmosphere with a pressure higher than 1 atmosphere is provided at the upper end of the outer semi-cylindrical wall. An opening is provided, a screw feeder is rotatably disposed inside the inclined gutter, and the hopper is placed above the inlet opening of the inclined gutter so that the gravity of the material to be processed is greater than the pressure of the atmosphere within the processing equipment. On the other hand, when the inclination of the screw feeder is reduced, when the material to be processed in the hopper decreases, the material to be processed is present in a closed state between the inlet opening and the outlet opening inside the inclined gutter, and the screw feeder is closed. Ida was made to idle, so while the transport device was in operation,
By acting as a stopper on the inclined gutter of various solid processing materials, it is possible to reliably prevent the blowback of harmful pressure gases in processing equipment such as incinerators, reactors or drying equipment, and therefore , processing materials can be safely and smoothly supplied to processing equipment,
There is no risk of air pollution, and there is no need for multiple surge hoppers, gate members, or control means to prevent gas from blowing back inside the processing equipment.The configuration is simple, and the set space is saved without increasing the size, making it compact. It has the advantage of being able to be manufactured in a number of ways.

[Brief explanation of the drawing]

FIG. 1A is a sectional view of the conveying device according to the invention during operation. FIG. 4B is a cross-sectional view of the conveying device in a state where the supply of processing material is stopped. Figure 2A is a plan view of the hopper in a square shape. Figure B is a plan view when the hopper is made circular. Figure 3 is a plan view of the pyrolysis incinerator. In the diagram, 11...hopper, 12...slanted gutter, 1
2a... Outer semi-cylindrical wall, 12b... Inner semi-cylindrical wall, 12c... Inlet opening, 12d... Outlet opening, 13... Screw feeder, 13a... Rotating shaft, 14a, 14b... Drive Device.

Claims (1)

[Scope of utility model registration request] Outer semi-cylindrical wall 1 inclined at the rear of the hopper 11
2a and an inner semi-cylindrical wall 12b are integrally provided, and an inlet opening 12c is provided at the lower end of the inner semi-cylindrical wall 12b, and the outer semi-cylindrical wall 12
An outlet opening 12d connected to a processing device having an atmosphere with a pressure higher than 1 atmosphere is provided at the upper end a, and a screw feeder 13 is rotatably disposed inside the inclined gutter 12, and the hopper 11 is Slanted gutter 12
The inlet opening 12c of the screw feeder 13 is designed to have a size that allows the gravity of the processing material to be greater than the pressure of the atmosphere inside the processing apparatus, and the slope of the screw feeder 13 is adjusted so that when the processing material in the hopper decreases, 12, the material to be treated is present in a closed state between an inlet opening 12c and an outlet opening 12d, and the screw feeder 13 is oriented at an angle such that it rotates idly.