JPS63208420A - Dehydration type waste feeder - Google Patents

Abstract

PURPOSE:To enable continuous discharge of fixed volume of waste aud dehydration thereof by reducing the pitch and the height of blades of a screw feeder gradually toward the discharge side, employing a cone type porous casing as a discharging section and providing a scraping blade for discharging dregs to an outlet cone. CONSTITUTION:Aqueous dregs thrown into a hopper 4 is carried through a screw feeder to a casing section 5 at the discharging section, where the diameter and the pitch of a screw blade 1 contacting with the casing section 5 are reduced gradually toward the outlet side of the casing section 5. Volume between the blades is reduced gradually so as to reduce the volume of dregs placed between the blades and compress the dregs thus carrying out first stage dehydration. A bladeless section 11 is provided at the outlet section, and dregs being fed from upstream pushes out the stagnating dregs thus carrying out second stage dehydration. An outlet cone 8 is provided at a discharge port 3 in order to adjust a gap with respect to the discharge section casing 5. Since the cone 8 can be moved resiliently by means of a spring 7, a constant discharge volume characteristic can be achieved at all times.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an apparatus for simultaneously dewatering and quantitatively feeding industrial waste, particularly paper waste, whose moisture content must be removed by compression, to a combustion device. .

<Prior art and its problems] Since the purpose of the conventional paper waste feeder is to continuously discharge (feed) a fixed amount, it is mainly used for two types of feeders with high quantitative discharge performance, as shown in Figures 5 and 6. The device uses a shaft or single shaft screw feeder. However, in this case, no consideration has been given to quantitative supply in which high-moisture paper lees is dehydrated in the process of being continuously discharged by a screw feeder, thereby reducing the moisture content of the discharge shaft and stabilizing combustion. This is because the constant supply of material from the hopper to the screw is dependent on the shape of the hopper and the bridging within the hopper, and the supply of material from the gun to the screw is dependent on the shape of the hopper and bridging within the hopper, and this surplus is also required.

In addition, conventional dewatering machines for paper waste, such as the one shown in Figure 7, also use a screw feeder, but since this type of dewatering machine is intended only for dewatering, after discharge ( The water content (after dehydration) is designed to be very small, which means that the required power is very large, and consideration is given to continuous quantitative discharge over a long period of time, in other words, the reduction in electricity costs as a gain from use. It can be said that there is a lack of consideration given to Another problem is that a separate device is required for quantitative supply.

The above two conventional technologies are technologies for achieving quantitative discharge and dehydration individually, and no consideration has been given to having both functions together.In order to satisfy both, two methods are required. Equipment needs to be installed separately, increasing equipment costs.

There have been problems in that the installation space has increased and the utility cost has increased.

<Object of the Invention> An object of the present invention is to provide a dewatering type waste supply device having both a continuous quantitative discharge function and a dehydration function in order to solve the problems of the above-mentioned prior art.

Overview of the means for achieving this> The above purpose is to provide a function for continuous quantitative discharge by adopting a screw feeder as the supply feeder, and to gradually reduce the pitch and height of the blades of this screw feeder toward the discharge side. and the screw feeder discharge part is made into a cone-shaped casing, and further, the casing is made of a perforated plate.
Furthermore, by attaching an outlet cone with a spring mechanism so that it can be moved to the screw shaft of the discharge port and a scraper blade to easily discharge the discharge part, the lees that is discharged in a fixed amount can be efficiently dehydrated. This is achieved by combining functions.

<Embodiment> An embodiment of the present invention will be described below with reference to FIG. 1 and FIGS. 2, 3, and 4 showing the details of the B portion of FIG. 1.

As for the screw blades, the blade diameter D, blade pitch P, and shaft diameter of the lower part of the hopper are unchanged as shown in FIGS. 3 and 4. Dehydration is carried out in a porous casing 5 that allows the separated water to be discharged outside the casing.

As shown in Figure 2, the screw corresponding to casing 5 is on the hopper side (jl) D2 > Dt, the pitch is P
l〉Pl, the shaft diameter remains unchanged, and the volume between the blade pitches (
The volume between the blades of one pitch is called the pitch volume. ) is the first dehydration stage.

Next, a bladeless portion 11 is provided on the discharge end side to perform water drainage as a second stage.

The screw at the bottom of the hopper has a few pinches, so the paper waste does not undergo so-called bridging. Therefore casing 5
At least one pitch of paper waste is smoothly fed into the connection part of the screw, filling the space between the blades, so that the screw retains its pre-dewatering state.

Note that the intermediate several pitches at the bottom of the hopper function sequentially from a certain value of the paper waste level on the connection part side of the paper waste in the hopper.

This has been confirmed by observation as a characteristic of screw discharge (transportation).

Next, the function of dehydrating the high moisture paper lees (hereinafter simply referred to as lees) that is continuously and quantitatively discharged will be explained. As mentioned above, the high moisture lees put into the hopper 4 is conveyed to the discharge part casing part 5 by the screw feeder, and the screw blade 1 in the part corresponding to this casing part becomes smaller as it goes towards the outlet side of the casing part. The diameter is D2>Dl
, the blade pitch is gradually reduced to P 2 > P l.

The reason why the blade diameter and blade pitch are gradually reduced in this way is that by gradually decreasing the volume between the blades (pitch volume), the volume of the lees between the blades is reduced, that is, it is compressed. The goal is to achieve the first stage of dehydration.

You can also dehydrate as planned with just this.

The lees partially dehydrated in this way is conveyed to the outlet part of the casing part, but in the present invention, a second
We are trying to dehydrate the stage.

That is, a bladeless part 11 is provided at the outlet, and the screw blade 1 is required to pass through this part (length L).
Because there is no blade, there is no conveying force by the blades, so the lees sent from the downstream side passes through under the force of pushing out the lees stagnant in the bladeless section 11. The lees stagnant here is further consolidated ( It is then discharged while being compressed (compressed) and dehydrated.

During this second stage of dewatering, an outlet cone 8 is installed at the outlet B and the gap between it and the casing of the outlet is adjusted as a means of increasing the dewatering effect. This outlet cone 8 can be elastically moved by a spring 7. The purpose of this is that even if the outlet cone 8 is set at the optimal position with the gap l between the screw blades 10 and the operation is performed, the discharge and dewatering characteristics may change depending on the properties of the lees, so the spring is moved by a certain amount (escape allowance). By doing so, it is possible to always obtain a constant discharge amount characteristic without causing the drive device to tumble.

Further, a scraping blade 9 is attached to the outlet cone 8 in order to efficiently scrape off the lees discharged between the outlet cone and the casing to the discharge port 6.

<Effects of the Invention> By carrying out this invention, a device having both a quantitative discharge function and a dehydration function is provided, and the conventional technology requires the installation of two devices each having a separate function. It is possible to perform dehydration and quantitative supply with one device, which has the effect of reducing equipment costs, reducing installation space, and effectively reducing power costs.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the external appearance of a device according to an embodiment of the present invention, Fig. 2 is a detailed cross-sectional view of section B in Fig. 1, and Fig. 6 is a partial cross-section of a two-shaft screw type with a protrusion cone. plan view of
Figure 4 shows the longitudinal direction of the screw in Figure 3 and the blade pitch P.
A diagram showing the relationship between one blade diameter D and one shaft diameter d, FIG. 5 is a side view of a conventional two-screw type lees transportation device from a hopper, and FIG. 6 is a cross-sectional view taken along line t-A in FIG. 5. FIG. 7 is a longitudinal sectional view of a conventional dewatering device. 1...Blade 2...Shaft 3...Exhaust port 5...Porous casing 7...Spring 8...Exit cone 9...
・Scraper blade 10... Gap between exit cone and blade end 16... Discharge direction Figure 1 Figure 2

Claims (1)

[Claims] 1. A screw that connects the lower part of a hopper containing a material whose liquid can be separated by compression to a cylinder having a circular cross section and capable of discharging the separated liquid to its outer surface, and passing through the cylinder. A dewatering type waste supply characterized in that a part of the screw corresponding to the lower part of the hopper has a constant pitch volume, and the other part corresponding to the cylindrical body has a pitch volume that decreases toward the discharge end. Device. 2. The dewatering type waste supply device according to claim 1, characterized in that a bladeless portion is formed on the discharge end side of the screw. 3. A trapezoidal cone-shaped outlet cone is provided on the screw discharge end side with the top facing the transporting direction of the transported object to enable elastic sliding displacement on the screw shaft, and is fixedly connected to the outer surface of the outlet cone. 3. A dewatering type waste supply device according to claim 1 or 2, characterized in that a scraper blade is provided.