JPS5920437B2 - strainer - Google Patents

Description

[Detailed description of the invention] This whole clear number ζ stock solution is propelled by a screw from the stock solution supply port side to the cake discharge port side in the furnace barrel chamber, and is continuously filtered.
Regarding the strainer of the squeezing type, a cake receiving recess that communicates with the large cylinder chamber so as to form the bottom of the cake discharge valve body, which is provided to restrict the discharge of cake so as to obtain cake of a desired degree of squeezing at the cake discharge port. The concave portion is formed into a bowl shape with a diameter so that it can be switched between a closed state in which the concave portion communicates with the furnace cylinder chamber and an open state in which the concave portion opens to the outside. The purpose of the present invention is to provide a strainer which is neat and tidy and allows cake to be easily discharged.

To explain the embodiment shown in the figure, reference numeral 1 denotes a furnace cylinder chamber, in which a raw solution supply port 2 is provided at the upper part and a cake discharge port 3 is provided at the lower part, and the peripheral wall between these two ports 2 and 3 is used to supply the raw solution. It is a mud wall 5 that filters the p-liquid and causes it to flow out to the p-liquid outlet 4.

The furnace cylinder chamber 1 is formed by fitting a separate cylindrical mud wall 5 into an outer cylinder 7 supported at an appropriate height by an appropriate number of supports 6.

The outer cylinder 7 has a raw solution supply port 2 on one side of the upper end, a furnace liquid outlet 4 on the opposite side at the same height as the shredded part, and a separate cake discharge port 3 or a backing 8 at the lower end. It is connected.

The cylindrical P wall 5 is made of a perforated plate, wire mesh, or other known furnace material, and has a hanging flange on the outer periphery of the upper end as a single-layer wall or a multi-layer wall so that the P liquid passes from the inner circumferential side to the outer circumferential side. An upper partition flange 9 is formed on the inner periphery of the upper end of the outer cylinder 7 to vertically partition the opening part of the stock solution supply port 2 and the P liquid outlet 4, and an upper partition flange 9 is provided on the inner periphery of the lower end of the outer cylinder 7. By inserting and removing the cylindrical p-wall 5 from above into the holding holes 9a and 10a of the lower partition flange 10, and freely fitting and holding it, the outer cylinder 7 and the door lock 5 are connected in the range between the flanges 9 and 10. A P liquid outflow chamber 11 communicating with the P liquid outflow port 4 is formed in between.

A Taisei 13 that valves and seals a backing 12 at the upper end of the outer cylinder 7 is attached with bolts or the like, and the flange 5a is connected to the upper partition flange via the backing 14 between the top plate 13 and the furnace wall flange 5a. Spring 15 to be crimped onto 9
are forced to work.

Inside the furnace cylinder chamber 1, there is a concentrate propelling/squeezing screw 16 that propels and compresses the concentrate from the concentrate supply port 2 side to the cake discharge port 3 side.
is installed vertically.

The screw 16 has its rotating shaft 16a connected to the top plate 1 of the outer cylinder 1.
3 protrudes upward from the seal part 17 provided at the center,
It is connected to a motor 19 held by a cylindrical body 18 to the top of the top plate 13, and receives rotational drive for propelling and squeezing the raw solution.

The cake discharge port 3 is divided into two parts, a base 3a and a lower half 3b, which are connected by bolts or the like via a backing 20, and a cake discharge valve body 21 is provided in the middle of the cake discharge port 3, and its outer spherical surface 21a is It is rotatably held between the abutting ends of the base 3a and the lower half 3b.

The cake discharge valve body 21 is bowl-shaped and has a cake receiving recess 22 that communicates with the P cylinder chamber 1 so as to form the bottom thereof.
By rotating around the axis X orthogonal to the axis Y of the F cylinder chamber, the intake port 22a of the recess 22 is in a closed state communicating with the inside of the furnace cylinder chamber 1 as shown in FIG. 1, and the reception port 22a is connected to the outside as shown in FIG. It is configured such that it can be switched to an open state in which it is opened.

23 is a backing interposed between the valve body 21 and the cake discharge port base 3a, and 24 is a backing interposed between the valve body 21 and the cake discharge port base 3a.
This is the backing interposed between the

Reference numeral 25 denotes an opening/closing switching means for switching the valve body 21 between the closed state and the open state, which is composed of an actuator, and performs the switching by rotating the valve body 21 in units of 180°.

This switching is performed by an appropriate signal.

For example, each time an increase in the driving torque of the screw 16 is detected that causes the recess 22 to be filled with cake, the valve body 21 is automatically kept open for a necessary period of time, and the open time is the same as when the recess 22 is filled with cake. A timer or the like may be used to set the length to be long enough for the cake inside to be discharged by natural fall or the like.

The switching means 25 has an operating shaft 25a connected to the cake discharge port 30.
The valve body 21 faces inside through a seal portion 26 provided between the abutting portions of the base portion 3a and the lower half portion 3b, and the tip square shaft 25b is fitted into the square hole 21b of the valve body 21. Rotate around axis X.

A backwash liquid supply port 27 communicating with the p-liquid outflow chamber 11 is provided in a part of the outer cylinder 7, and is normally closed by a joint 28.

The stock solution that is supplied into the tank chamber 1 through the stock solution supply port 2 and filled therewith is affected by the sum of its supply pressure, downward propulsive pressure due to the propulsive action of the muckrew 16, and self-weight pressure, and the liquid content is distributed around the p-tube chamber 1. Through the furnace wall 5, the P liquid is pushed out as a P liquid into the P liquid outflow chamber 11, and is gradually concentrated.

The larger the solid content in the liquid that is gradually concentrated in the P cylinder chamber 1, the more easily it moves downward, and enters the cake receiving recess 22 of the valve body 21, replacing the liquid that was in the same recess 22. It gradually accumulates and stagnates.

On the other hand, even if a liquid containing solids with small particle size and still having good fluidity is in the recess 22, which is the lowest position in the tube chamber 1, large solids will accumulate in the recess 22. As a result, small solids are expelled upwards and sent through the filtration again, helping to separate large and small particles in the liquid.

As a result, cake accumulates in the cylinder chamber 1 starting from the bottom of the concave portion 22 communicating with the cylinder chamber 1, resulting in a high solid content density and high concentration.

Furthermore, the summation of the pressures continues to act on the cake that accumulates in the lower part of the P cylinder chamber 1, and while the cake is squeezed to drive out the coexisting liquid further upwards, filtration continues in the 5th part of the F wall. do.

Therefore, as shown in FIG. 3, the inside of the barrel chamber 1 has a compression area B at the bottom, a filtration area A above it, and a solid content density distribution in the height direction of the barrel chamber 1 as shown by line C in FIG. According to the duration of the filtration and squeezing, a cake with a desired concentration is accumulated in the recess 22, and the solid particles in the P liquid are well arranged to have a set particle size or less.

When cake of a predetermined concentration accumulates in the recess 22, the valve body 2
1 is switched to the open state shown in FIG. 2 by the switching means 25, and the cake in the recess 22 is discharged downward from the cake discharge port 3.

When the valve body 21 is switched, the receiving portion D 22 of the recess 22
a is located between the backings 23 and 24 as shown by the imaginary line in FIG. Even when the cake is being discharged, it is possible to continue draining and squeezing the cake inside the canister chamber 1 at all times.

After the cake is discharged, when the valve body 21 is returned to the closed state shown in FIG. At the same time, there is a temporary pressure drop in the furnace chamber 1.
Thereafter, filtration and compression proceed in the same manner as described above.

When backwashing the furnace wall 5, when the backwash liquid is fed from the supply port 27, the P liquid outflow chamber 11 flows into the furnace wall 5 from the P liquid outflow chamber 1.
It flows in the opposite direction to the F liquid, and by filtration, the solid matter that has adhered and clogged the tube chamber 1 can be washed away.

At this time, the furnace liquid outlet 4 is closed to prevent backwash liquid from flowing out there.

Wash away the solid matter that has adhered and clogged the tube and remove it from the tube chamber 1.
The backwash liquid entering the inside is discharged from the stock solution supply port 2, but if it is not desirable to flow back into the stock solution tank, the backwash liquid discharge pipe can be switched and connected to be discharged to a desired location.

When replacing the mud wall 5, etc., the furnace wall 5 can be pulled out upward by removing the top plate 13 at the upper end of the outer cylinder 7.

In the above-mentioned embodiment, the furnace barrel chamber 1 is vertically shaped, but it may be possible to change the furnace chamber 1 as long as it does not lose the characteristic that the large solid content in the liquid preferentially enters and accumulates in the recess 22 of the valve body 21 as described above. ,
It is also possible to use an inclined type in which the tube chamber 1 is inclined.

Further, the opening and closing operations of the valve body 21 may be performed manually depending on the flow of the P liquid, or may be performed periodically by programming.

Further, the operation for discharging the cake of the valve body may be repeated twice.

Instead of being biased by the spring 15, the furnace wall 5 may be screwed to the upper partition flange 9.

According to this invention, in the strainer having a liquid propelling/squeezing screw for propelling and squeezing the liquid from the upper liquid supply port side to the lower cake discharge side in the furnace cylinder chamber, the cake discharge port is connected to the furnace cylinder chamber. It has a cake receiving recess that communicates with the bottom of the receiving recess, and is provided with a cake discharge valve body that can be switched between a closed state in which the receiving recess communicates with the barrel chamber and an open state in which the receiving port opens to the outside. Therefore, when the valve body is in the closed state, the recess forms the bottom of the furnace barrel chamber and receives and stores large solids in the liquid that is filtered and squeezed in the barrel chamber. This area serves as an area where the liquid containing solids and still having good fluidity is forced upward to be subjected to filtration again, helping to separate large and small solids in the liquid.
It helps improve filtration and squeezing properties, and allows the solid particles in the tear fluid to be well adjusted to a set particle size or less.

Further, the cake concentrated from the stock solution is smoothly stored in the recess while being squeezed to the necessary degree, and the cake accumulated in the recess is switched to the open state in which the recess is opened to the outside. However, it does not affect the filtration and squeezing inside the furnace cylinder chamber at all, so it can be easily discharged while filtration and squeezing continue.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of one embodiment, FIG. 2 is a partial sectional view showing the valve body in an open state, and FIG. 3 is a graph showing the relationship between the height inside the barrel chamber and the solid content density. DESCRIPTION OF SYMBOLS 1... Stainless steel chamber, 2... Stock solution supply port, 3... Cake discharge port, 3a... Base, 3b... Lower half, 4...
P liquid outlet, 5...furnace wall, 7...outer cylinder, 11...
Mud liquid outflow chamber, 16... Raw liquid propulsion/squeezing screw, 1
6a... Rotating shaft, 19... Motor, 21... Cake discharge valve body, 21a... Outer spherical surface, 22... Cake receiving recess, 22a... Receiving port, 25... Opening/closing switching means.

Claims (1)

[Scope of Claims] 1. An outer cylinder having an undiluted solution supply port at the upper part and a cake discharge port at the lower part, and a peripheral wall that serves as a door for filtering the undiluted solution, and the upper end side faces the upper undiluted solution supply port side of the outer cylinder. A cylindrical mud wall that is arranged concentrically within the outer cylinder to form a p-liquid outflow chamber between its own peripheral wall and the outer cylinder, and also makes the inside of its own cylinder a furnace cylinder chamber into which raw liquid is introduced. , a P liquid outlet opening in a portion corresponding to the P liquid outflow chamber of the outer cylinder and guiding the P liquid to the outflow path, and a P liquid outlet provided vertically in the furnace cylinder chamber to propel the raw liquid from the supply port side to the cake discharge port side. The cake receiving recess is provided with a cake receiving recess at the cake discharge port that communicates with the furnace cylinder chamber so as to form the bottom thereof, and the receiving opening of the cake receiving recess communicates with the furnace cylinder chamber. Strainer-0 characterized by having a cake discharge valve body that can be switched between a closed state and an open state in which the receiving port is opened to the outside. The strainer according to claim 1, wherein the strainer is held and rotated around an axis perpendicular to the axis of the cake discharge port to switch between the closed state and the open state. The strainer-0 according to claim 1 or 2, which is installed in an inclined state.