JPS6127616Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to the improvement of a humidifying device used to humidify fine dust discharged from a dust collector, etc. prior to solidification, and in particular to a device that can perform humidifying operations stably. It is related to.

Batch-type dust humidifiers are conventionally known as this type of dust humidifier, but they have drawbacks such as complicated and troublesome maintenance, high power costs, and increased processing costs. We have previously developed a humidifying device that eliminates all of these problems and can freely adjust dust humidification, and have filed a separate application for utility model registration. That is, as shown in FIG. 1, the dust humidifying device according to the application includes a humidifying cylinder 2, a dust chute 5 connected to the cylinder 2, and a piston 3 fitted so as to freely move forward and backward within the cylinder 2. Furthermore, it has a new and excellent technical feature in that the water supply section 8 is exposed at an appropriate position on the circumferential wall of the cylinder 2. As a result, the surface layer of the dust W filled into the cylinder 2 from the dust 5 in the direction toward the cylinder outlet is as shown by the hatched part in FIGS. The dust in the above-mentioned state does not adhere to the inner circumferential wall surface of the cylinder 2, but is released from the throttle outlet 2a as humidified dust that has been humidified almost to the inside by extrusion of the piston 3. This is the end of a good humidifying operation.

However, in continuous operation, the following problems may occur depending on the case. That is, since the dust discharged and collected from incinerators, dust collectors, etc. is at a high temperature, when water is added to the dust W in the cylinder 2, a large amount of steam is generated in the cylinder 2, and this steam is converted into the dust shoot 5. Part of the dust condenses in the relatively narrow connection part 6 with the cylinder 2 and absorbs moisture, causing dust bridging from the connection part 6 to the bottom of the dust chute 5, making the dust supply operation unstable, and in severe cases. It has become clear that the dust supply may be interrupted in some cases.

The object of the present invention is to solve the above-mentioned problems and provide a humidifying device that can stably humidify dust in a high-temperature state over a long period of time.

However, such a humidifying device is a device that sequentially humidifies collected high-temperature dust, and includes a humidifying cylinder that receives and sequentially transfers the dust, and a powder surface connected to the top of the upstream side of the cylinder. a dust chute with a meter; a dust feeding piston fitted so as to freely move forward and backward within the cylinder;
It consists of a water supply section connected to an appropriate position on the peripheral wall of the cylinder, and further, the powder level meter and the piston drive device are connected via a control circuit, and the chute is connected to the chute except when the dust in the chute is loaded into the cylinder. The gist is that the piston is located so as to block communication with the cylinder.

The configuration and effects of the present invention will be explained below based on the drawings of the embodiments. However, the embodiments below are merely representative examples, and the type and placement position of the powder meter, for example, can be designed as appropriate in accordance with the spirit of the above and below. Modifications, etc. are included within the technical scope of the present invention.

FIG. 3 is a schematic explanatory diagram of a dust humidifying device according to the present invention, and components having the same configuration as the device example in FIG. 1 are given the same reference numerals. In this figure, 1 is a humidifier, 2 is a cylinder arranged with a slight downward slope, 3 is a piston that can be inserted into the cylinder 2, 4 is a drive device for moving the piston 3 forward and backward, 5 is a chute connected to the top of the upstream side of the cylinder 2, and a rotary vane type powder level meter (hereinafter simply referred to as "powder level meter") 10 is attached to a predetermined position on the outer periphery of the chute 5 and communicates with the inside thereof.
Further, the powder level meter 10 and the drive device 4 are connected via a control circuit 11. The control within the control circuit 11 is such that when the powder level meter 10 is turned off (that is, when a predetermined amount of dust has accumulated in the chute 5), the drive device is turned on.
As soon as the dust in the chute 5 falls into the cylinder 2, the piston is moved forward to the solid line position shown in the figure (i.e., the communication between the chute 5 and the cylinder 2 is cut off). ) operation, and when this operation is completed and the drive device 4 is turned off, the powder level meter 10 is turned on at the same time. Further, 8 is a water supply unit connected to the top of the downstream side of the cylinder 2, 8a is a tank, and 8b is a pump.

The humidifying operation using the embodiment apparatus configured as described above will be explained below.

First, when the piston 3 is advanced by the drive device 4 (the state shown by the solid line in Fig. 3), high-temperature dust (hereinafter simply referred to as dust) W is drawn into the chute 5 from a dust storage part (dust collector, etc.) that does not appear in the figure. will be put into. Then, when a certain amount of dust W is thrown into the chute 5 and its upper surface hits the rotary blade 10a of the powder level meter 10, the increased torque confirms that a predetermined amount of dust W has been thrown into the chute 5. Therefore, the injection of dust W is stopped by that signal. At the same time, this signal is transmitted from the control device 11 to the control device 4, and the piston 3 is retracted to the position shown by the broken line in FIG. Dust W is supplied from the port 5a. Immediately after the dust supply into the cylinder 2 is completed, the drive device 4 is activated to advance the piston 3 to the solid line position in FIG. The humidification operation described in 2 is performed, and at the same time, the introduction of dust W into the chute 5 is resumed.

That is, after the piston 3 advances to the solid line position in FIG. 3, or at the same time, the pump 8b is operated to start supplying water, and water is supplied from the upper part of the cylinder 2 into the cylinder 2 through the piping 8c from the tank 8a. do. As a result, the dust W in the hatched portion shown in FIG. 3 is in a moderately humidified state. At this time, the dust W filled into the cylinder 2 is in a high temperature state, so when water is added, a large amount of steam is generated, and the spaces between the particles of the dust W in the cylinder 2 are filled with steam. Since the piston 3 is tightly fitted to the root side of the chute 2, there is no risk of steam flowing toward the dust supply port 5a, and there is no risk that the dust W in the chute 6 will be humidified and cause a bridging phenomenon. There isn't.

The steam filling between the dust particles in the cylinder 2 comes into contact with water sent from the water supply section 8 and is cooled.
The dust W is condensed, and the dust W is cooled and kept in a moderately humidified state. Meanwhile, new dust W is accumulating in the chute 5 during this time, and when its upper surface hits the rotating blade 10a of the powder level meter 10, the powder level meter 10 is turned OFF due to the torque, and at the same time, the drive device 4 turns ON, the series of operations described above occur, namely, the piston 3 retreats to the B position (dashed line position), the dust _W0 falls into the cylinder 2, and the piston 3 moves to the A position (solid line position). The operations of advancing and humidifying the dust in cylinder 2 are performed in sequence.
The humidifying dust indicated by hatching in the figure is extruded and discharged. By the way, during the series of operations described above, when the dust W is supplied into the cylinder 2 in the chute 5, the chute supply port 5a and the cylinder 2 naturally communicate with each other, but at this point, the dust on the tip side of the cylinder is sufficiently humidified. Since it is cooled, the amount of water vapor flowing in the direction of the chute 5 is extremely small, and the dust inside the chute 5 is
There is no risk that W ₀ will be humidified to the extent that it causes bridging. In addition, in other operating processes except when dust W is supplied into the cylinder, the piston 3 is stationed at the solid line position in FIG. 3, and prevents water vapor from flowing toward the supply port 5a of the chute 5. Therefore, even if the same operation is repeated over a long period of time thereafter, the humidification operation will not be hindered by the shoot bridge as in the conventional case, and its stability can be maintained.

In this case, the pump 8b is connected to the control device 11,
In addition to the series of operations of feeding and stopping dust into the cylinder 2 and moving the piston 8 forward and backward as described above, it is also possible to link and automatically control the injection and stopping of water.

Next, an installation example of the device of the present invention will be explained based on FIG. 4. The exhaust gas generated in the incinerator 18 is
4 to the first electrostatic precipitator 15 and the second electrostatic precipitator 1
6 to a predetermined exhaust gas treatment section 17, during which time a large amount of dust in a high temperature state in the exhaust gas is completely captured by the first electrostatic precipitator 15 and the second electrostatic precipitator 16. That is, regarding the first electrostatic precipitator 15, the captured dust falls and accumulates in the bottom cavity 15a of the dust collector, but is carried to the entrance side of the dust collector by the flight conveyor 18 provided along the floor surface in the cavity 15a. It will be done. A screw conveyor 19 is provided on this inlet side in the direction penetrating the page, and carries the carried dust further toward the front side in the direction penetrating the page, and drops it from the relay pipe 20 into the transport pipe 25. 21 is an on-off valve. Second electrostatic precipitator 1
6, the dust is similarly dropped into the transport pipe 25 from the relay pipe 23. The dust carried to the transport pipe 25 is carried in one direction by a coil conveyor 26 and is dropped into the chute 5 of the apparatus 1 of the present invention. In the apparatus 1, as described above, a good humidifying operation is performed to form humidified dust, and then a predetermined solidification process is performed in the molding machine 27 to form a solidified product 28. This series of dust treatment operations can be performed stably for a long period of time, and no dust scattering phenomenon occurs between the outlet of the device 1 of the present invention and the inlet of the molding machine 27, and the dust of the device 1 of the present invention is It was confirmed that the humidifying effect was reliably exerted.

Since the humidifying device of the present invention is configured as described above,
It has become possible to stably perform the humidification operation of dust over a long period of time, which is performed prior to cooling and solidifying high-temperature dust discharged from incinerators, dust collectors, etc.

[Brief explanation of the drawing]

Figure 1 is a schematic explanatory diagram of a conventional dust humidifier.
2 is a sectional view taken along the line -- in FIG. 1, FIG. 3 is a schematic explanatory diagram of the dust humidifying device of the present invention, and FIG. 4 is a schematic explanatory diagram of a dust solidification processing system to which the device of the present invention is applied. 1, 1'... humidifier, 2... cylinder, 3...
...Piston, 4...Driving device, 5...Chute,
5a... Supply port, 8... Water supply section, 10... Powder level meter, 11... Control device.

Claims (1)

[Scope of utility model registration request] It is a device that sequentially humidifies collected high-temperature dust, and includes a humidifying cylinder that receives the dust and sequentially transfers it, a dust chute with a powder level gauge connected to the top of the upstream side of the cylinder, and a dust chute that can move freely inside the cylinder. It consists of a dust feeding piston fitted so as to move forward and backward, and a water supply section connected to an appropriate position on the peripheral wall of the cylinder, and further, the powder level meter and the driving device for the piston are connected via a control circuit, A dust humidifying device characterized in that a piston is arranged so as to block communication between the chute and the cylinder except when the dust in the chute is loaded into the cylinder.