JP2000314591A - Solid-liquid separating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid-liquid separating device to be decreased in size and superior in separation capacity and moreover perform treatment at a low cost. SOLUTION: This device comprises a main cylinder 5 in which a solid liquid mixture is charged, a main screw 6 incorporating the main cylinder and feeding forward a solid liquid mixture, a means to heat the solid liquid mixture fed forward through rotation of the main screw, and an exhaust port 13 formed in the main cylinder and discharging heated and gasified gas. Auxiliary cylinders 8 and 8, incorporating auxiliary screws 9 and 9' are connected to the exhaust port 13, the auxiliary screws are rotated to return a solid substance to the main cylinder 5, and gas is discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid-liquid separation apparatus for separating a liquid from a solid-liquid mixture such as sludge, solvent-containing synthetic resin, and manure.

[0002]

2. Description of the Related Art Conventionally, as a method of separating a solid-liquid mixture such as sludge containing water or resin containing a solvent into a liquid and a solid, it is called spray drying in which the mixture is sprayed into a high-temperature tank and separated. There has been known a method, a method called a rotary kiln in which a large drum is rotated and hot air is fed into the drum.

[0003]

However, each of the above methods has a problem that the apparatus is large and the separation capacity is not sufficient. For that reason, the processing amount is limited,
There was a problem that processing cost was high.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a solid-liquid separation apparatus which is small in size, has excellent separation ability, and can be processed at low cost.

[0005]

According to the present invention, there is provided a main cylinder for charging a solid-liquid mixture, a main screw contained in the main cylinder for feeding the solid-liquid mixture forward, and a main screw. Means for heating the solid-liquid mixture sent forward by the rotation of, and an exhaust port provided in the main cylinder for discharging heated and vaporized gas, and a sub screw is built in the exhaust port. A sub-cylinder is connected to the sub-screw, and the sub-screw rotates so as to return solids to the main cylinder, and discharges gas.

In short, the present invention vaporizes the liquid in the process of sending the solid-liquid mixture forward and discharges the vaporized gas from the exhaust port, but prevents the simultaneously discharged solid from being pushed back by the auxiliary screw and discharged. The gist of this is.

Next, an embodiment of the present invention will be described.

[0008]

The object to be treated used in the present invention is not particularly limited as long as it is a solid-liquid mixture containing a liquid which can be volatilized by heating. Such materials include, for example, sludge, solvent-containing synthetic resin, livestock and human excrement.

FIG. 1 shows an example of the apparatus of the present invention. An object (solid-liquid mixture) contained in a storage tank 1 is pressurized by a pressure pump 3 through a pipe 2. It is pressed into the main cylinder 5 from the hopper 4.

A main screw 6 is provided in the main cylinder 5, and the main screw 6 is rotated by a motor 12 so as to send the press-fitted workpiece forward.

A band heater 7 is fixed to the outer periphery of the main cylinder 5. The object to be processed is heated by the band heater 7, but is heated substantially uniformly by the stirring action of the rotation of the main screw 6.

The object to be processed in the main cylinder 5 is rapidly pushed forward by the pressure of the pressure pump 3 and the expansion pressure caused by being heated by the heater 7, and is ejected from the sub-cylinder 8. Along the auxiliary screw 9 provided inside, the vehicle advances toward the auxiliary discharge port 10.

At this time, the auxiliary screw 9 is being rotated by the motor 12 in the direction of pushing back the direction opposite to the ejection direction of the object, so that only the solid matter is pushed back, and the vaporized gas is sent to the auxiliary discharge port 10. And is liquefied by the heat exchanger 15 and stored in the storage tank 16.

A plurality of sub-cylinders 8 with sub-screw 9 are preferably provided in the traveling direction of the workpiece. The liquid in the processing object which is not separated by the first-stage sub-cylinder with the sub-screw is separated and recovered in the same manner as above by the second-stage sub-cylinder 8 'with the sub-screw 9'.

Since the strongest ejection pressure is applied to the sub-cylinder with the sub-screw at the first stage, the diameter of the sub-cylinder 8 is preferably set to 0.2 to 0.8 with respect to the main cylinder 1. Within this range, separation can be performed effectively.

In the second and subsequent stages, since the pressure becomes weaker than in the first stage, it is preferable to increase the pressure sequentially.
It is good to make it 1.2 times to 2 times of the stage. This is the same principle as that in the steam engine, the diameter of the piston gradually increases as the pressure decreases from the first-stage cylinder piston.

The number of sub-cylinders with sub-screw is
It may be appropriately selected according to the type of the object to be processed, the processing amount, and the like, and is not particularly limited.

Heating / cooling jacket heaters 11, 11 'are provided on the outer periphery of the sub cylinders 8, 8'.
Heating or cooling can be performed depending on the object to be processed and the stage of the sub-cylinder.

Generally, the first-stage sub-cylinder is
After cooling, the second and subsequent stages are preferably heated to remove liquid from solids.

A main exhaust port 1 is provided on the front upper surface of the main cylinder.
3 are formed. This removes the liquid that could not be separated and removed from the sub-discharge port. This may of course be provided in a plurality in the traveling direction.

The solid separated from the object to be processed in this way is formed into a predetermined shape by the die 14.

The shaft of the main screw 6 connected to the motor 12 and the fitting portion of the main cylinder 5 have a security packing 17 interposed therebetween to prevent leakage of fluid.

In the above embodiment, both the main cylinder and the sub-cylinder are of a single-shaft type in which one screw is provided, but this may be a multi-shaft type in which two or more screws are provided.

When manure is used as an object to be treated and treated by the method of the present invention,
It has been confirmed that the odor disappears from the solid.

According to the present invention, although a considerable expansion pressure is applied by the gas which has been heated and vaporized, only the gas can be effectively separated by the auxiliary screw. This is because the auxiliary screw rotates the solid in the pushing direction, and the solid is returned to the main cylinder.

[0026]

As described above, according to the present invention, a solid can be separated from a solid-liquid mixture by an extremely simple apparatus, so that the operation cost is greatly increased as compared with the conventional solid-liquid separation method. Reduce. Further, when the manure is treated, the bad smell disappears from the separated solid, and this solid is extremely useful as an organic fertilizer.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

[Explanation of symbols]

 3. Pumping pump 5. Main cylinder 6. Main screw 8, 8 '... Sub-cylinder 9, 9' ... Sub-screw 10, 10 ' Exhaust port 12 ······ Motor 13 ···

Claims (6)

[Claims] 1. A main cylinder for charging a solid-liquid mixture, a main screw contained in the main cylinder for feeding the solid-liquid mixture forward, and heating the solid-liquid mixture sent forward by rotation of the main screw. Means, and an exhaust port provided in the main cylinder for discharging the vaporized gas that has been heated and vaporized, and a sub-cylinder incorporating a sub-screw is connected to the exhaust port, and the sub-screw is used for solid matter. The solid-liquid separation device is configured to rotate so as to return to the main cylinder and discharge gas. 2. The separation apparatus according to claim 1, further comprising a pressure pump for pressurizing the solid-liquid mixture and charging the mixture into the main cylinder. 3. The ratio of the inner diameter of the main cylinder to the inner diameter of the sub cylinder is 1: 0.2 to 0.8.
4. The separation device according to claim 1. 4. The separation apparatus according to claim 3, wherein a plurality of the sub-cylinders are provided in a length direction of the main cylinder, and the diameter of the sub-cylinders increases toward the front. 5. An opening for discharging gas is formed on an upper surface of the main cylinder in front of the sub cylinder.
The separation device according to any one of claims 4 to 4. 6. The separation apparatus according to claim 1, wherein a die is provided at an end of the main cylinder, and a solid separated from the liquid by the die is formed into an appropriate shape.