JPS6085111A - Surface liquid sucking device - Google Patents

Abstract

PURPOSE:To effectively suck water containing oil in a wave surface, by a method wherein an inner cylinder, having a float located to the lower part of a suction funnel and around a waterway, is slidably engaged with an outer cylinder having an open port at its upper part and a discharge port at its lower part. CONSTITUTION:When suction liquid in a liquid storage chamber 10 is decreased to decrease buoyancy of a float 6 and an inner cylinder 3 is lowered to below a liquid level W.L., after surface liquid is sucked through the upper edge of a suction funnel 4, it is fed through a waterway 5 and the liquid storage chamber 10 to a float separating tank for oil water by means of a drain port. Thereafter, when an amount of liquid stored in the liquid storage chamber 10 is gradually increased, the upper end of the inner cylinder 3 is forced to emerge from the liquid level W.L. by virtue of the buoyancy of the float 6 and suction of surface liquid through the funnel 4 is suspended. When drainage through a drain port 2 is continued and the amount of the liquid in the liquid storage chamber 10 is decreased, the inner cylinder 3 is lowered to below the liquid level in conformity with the float 6, and a surface liquid is started to be sucked again through the funnel 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction device capable of effectively suctioning surface liquid, particularly oil-containing water at the surface layer, such as high concentration, high viscosity oil-containing water, or solidified or semi-solidified oil-containing water.

Conventionally, oil-impregnated water containing high concentration, high viscosity oil, solidified or semi-solidified oil containing organic SS (suspended solids) and proteins, etc. has been used in school, company cafeterias, hotels, etc. Grease traps in drainage canals of restaurant factories, slaughterhouses, etc.
In addition to being generated in large quantities in concentrated quantities in drainage canals 1-ramp of fishery processing plants, poultry processing plants, etc., heavy oil and the like are also spilled into the sea in large quantities due to tanker accidents, oil tank accidents, etc.

In order to separate oil from such oil-containing water, generally a large amount of oil-containing water is first sent to a flotation tank and the oil is separated by flotation, or the oil is concentrated to a certain degree by flotation and then transferred to a centrifugal separator. moisture! Measures such as separation using an LT machine are being taken.

However, treating a large amount of oil-containing water usually requires large-scale treatment equipment, and the cost of treatment is also enormous, so the oil-containing water to be treated is collected at the highest possible oil concentration. It is desirable that the liquid be removed.

Therefore, when separating oil from oil-containing water in various drainage traps or heavy oil spilled into the sea as described in (b), priority should be given to high concentration, high viscosity oil, solidified or semi-solidified oil in the liquid surface layer. If suction becomes possible, the flotation tank or oil-water separator described above can be made smaller.

In addition, in some oil-containing water, if the above-mentioned high-concentration oil content in the surface layer is separated, the oil-containing water below the surface layer may become dilute oil-containing water with an oil concentration of about 1100 pp. With regard to oil-containing water, residual oil can be easily separated using a biological treatment device, a coarsening treatment device, or the like.

Conventionally, various devices have been developed to suck surface liquid from this point of view, but they have been developed to absorb high viscosity organic oil, solidify,
Many devices are not suitable for suctioning oily water containing semi-solidified oil, and many devices preferentially suck low-concentration oil in the lower layer rather than surface oil. The reason why highly viscous or highly concentrated oils in the surface layer are difficult to absorb is thought to be that as the thickness of these oil layers increases, the viscosity of the oil layer also increases and fluidity decreases. Furthermore, in the case of solidified or semi-solidified oils, their fluidity may be completely lost.

Therefore, in general, the oil content in the surface layer is sucked in conjunction with the suction of oil-containing water in the lower layer, but in this case, a large-capacity flotation tank is required, and as mentioned above, the processing cost increases. be. There is also a large powered suction type suction device, but it has the disadvantage that the surface oil-containing water is agitated by a pump to produce fine oil, which greatly increases the time required to separate it. , Next, as a specific example of a surface water intake device,
39 and JP-A-55-163183 are known.

The device disclosed in the former is such that a water intake board is attached to the bottom of the float with a gap, and a water intake pipe is installed vertically on this water intake board, so that the float moves up and down in response to changes in the water level. The idea is to take water at a fixed depth. but,
This device has the disadvantage that the water intake board is located below the float, so water can only be taken into the water at a certain depth below the surface layer, but not at the surface layer.Furthermore, the water intake board can swing together with the float. Therefore, if the liquid level is fluctuating, it may become difficult to take in water at a constant depth. The latter device was previously invented by the applicant in order to automatically suck the surface layer of the liquid, and consists of an outer box with an open port at the top and a discharge port at the bottom, which is fixed below the liquid surface. A weir plate with serrated notches at its upper end is installed inside this outer box so that it can slide freely against the inner wall of the outer box, and a float is attached to this weir plate so that the upper end of the weir plate is free from liquid. It is a device configured to float and sink from a surface. Compared to conventional water intake devices, this device is able to take in only surface liquid, but on the other hand, the float fixed inside the weir plate is cylindrical and is placed in the center of the weir plate. However, if there is a large fluctuation in the liquid level, the weir plate may not be able to slide up and down against the outer box smoothly, making stable surface water intake difficult.
Further, such a float structure is not suitable for large-scale use because it is difficult to secure a sufficient float volume. Furthermore, the narrow gap between the outer cylinder and the weir plate is easily clogged with highly viscous oil and SS, which obstructs the vertical sliding of the weir plate, and the serrated notches provided at the upper end of the weir plate prevent foaming. It has been pointed out that this method has the opposite effect when suctioning highly viscous oil, etc., and has drawbacks such as foam getting stuck in the notched teeth and making suction impossible.

The present invention has been made by focusing on the problems of such conventional water intake devices, and it is possible to extract these from oil-impregnated water in which highly concentrated and highly viscous oil is suspended, or oil-impregnated water in which solidified or semi-solid oil is suspended. It is an object of the present invention to provide a device capable of preferentially and always stably sucking only surface liquid containing floating oil.

The present invention will be described below based on drawings showing embodiments.

FIG. 1 shows a longitudinal cross-sectional view of the surface liquid suction device of the present invention, (
a) shows a state in which surface liquid is being suctioned, and (bl shows a state in which it is not being suctioned).

In the figure, the suction device A of the present invention is shown at a liquid level (W).

L) Fixed at the bottom, with an open port at the top and a discharge port 2 at the bottom end.
The suction device of the present invention is mainly composed of an outer cylinder 1 equipped with an outer cylinder 1 and an inner cylinder 3 that is vertically slidable relative to the outer cylinder 1, but the inner cylinder 3 has particular features in the suction device of the present invention. That is, the inner cylinder 3 of the suction device A of the present invention has an open opening at the top, a water passage 5 is connected to the lower end of the suction funnel 4 with a taper 4' formed on the side surface, and a float 6 is provided on the outer periphery of the water passage 5. A taper 6' is formed on the upper surface of the float 6 from near the upper edge of the suction funnel 4 toward the upper edge of the water passage 5, corresponding to the side taper of the suction funnel 4. 6 also has a reverse funnel-shaped taper 6 extending from the outer periphery of the inner cylinder 3 toward the lower edge of the central water passageway.
Furthermore, a weight 7 for adjusting the buoyancy of the float 6 is detachably attached to the lower part of the inner wall of the float 6 facing the water passage 5 as required.

Therefore, as mentioned above, the outer circumference of the inner cylinder 3, which has the suction funnel 4 at the top, the water passage 5 at the center, the float 6 at the bottom of the suction funnel 4, and the outer circumference of the water passage 5, is uniformly vertical. It is formed into a surface and can freely slide up and down along the inner circumferential surface of the outside 'vJ1. In this case, the upper open end edge 8 of the outer cylinder 1 is bent inward so that the gap with the inner cylinder 3 is maintained at approximately 0.2 to 1.0 mm, and serves as a sliding guide between the inner cylinder 3 and the outer cylinder 1. There is a gap between the inner circumferential surface of the outer tube 1 other than the edge 8 and the outer circumferential surface of the inner tube 3 to provide sliding resistance when the inner tube 3 moves up and down within the outer tube 1. is configured to reduce the

Further, an inverted cone-shaped taper is also formed on the cylinder wall 9 extending from the outer cylinder l to the discharge port 2 connected to the lower end thereof. Therefore, the space below the inner cylinder 3 and surrounded by the outer cylinder 1 and the cylinder wall 9 is formed as a liquid storage chamber 10, and the cross-sectional area of the discharge port 2 is smaller than the cross-sectional area of the water passage 5 of the inner cylinder 3. is formed.

Next, the operation of the suction device of the present invention will be explained. First, the suction liquid stored in the liquid storage chamber 10 decreases, the buoyancy of the float 6 decreases, and the inner cylinder 3 moves as shown in FIG. 1 (al). When the surface liquid descends below the liquid level (W, L) as shown in FIG. The liquid is pumped from the discharge port 2 to the oil-water flotation separation tank (not shown) through the water passageway 5, but the amount of liquid flowing into the liquid storage chamber 10 through the water passage 5 is larger than the amount of liquid discharged through the discharge port 2. Therefore, the amount of liquid stored in the liquid storage chamber IO gradually increases, and the upper end of the inner cylinder 3 eventually reaches the liquid level (W) due to the buoyancy of the float 6.

[5] It becomes the state shown in FIG. 1 (bl), and the suction of the surface liquid from the suction funnel 4 is interrupted. In this state, the amount of liquid stored in the liquid storage chamber 10 reaches its maximum, but As the discharge from the discharge port 2 continues, the amount of liquid stored in the liquid storage chamber decreases, and eventually as the float 6 sinks, the inner cylinder 3 descends below the liquid level, and suction of surface liquid from the suction funnel 4 starts again. do.

The surface liquid is suctioned by repeating the above operations, and the suction device of the present invention provides various advantages as described below.

That is, first, the float 6 is installed around the outer periphery of the water passage 5 at the center of the inner cylinder, and the outer periphery of the inner cylinder 3 that slides within the outer periphery 1 is the float 6.
Since the float 6 itself is formed so as to be substantially composed of the following, the float 6 itself does not swing even when the liquid level swings, and therefore the suction funnel 4 integrally formed on the top surface of the float 6 does not swing. , only the surface liquid is preferentially and stably sucked at all times. Further, since the upper edge of the suction funnel 4 is formed flat without any serrations, even oil with high concentration, high viscosity, and bubbles can be suctioned without getting caught.

Next, since the inner cylinder sliding guide 8 bent inward is provided on the upper edge of the outer cylinder 1, the sliding resistance of the inner cylinder 3 with respect to the outer cylinder 1 is limited to the guide 8. 55-163
Unlike the suction device described in Publication No. 183, the sliding resistance of the inner cylinder 3 with respect to the outer cylinder 1 is significantly reduced because the contact surface between the outer cylinder and the inner cylinder does not cover the entire contact surface, and the sliding resistance of the inner cylinder 3 with respect to the liquid level is significantly reduced. The sinking and rising operations are extremely smooth and sensitive. Furthermore, the risk of clogging of high viscosity oil or SS in the narrow gap between the outer cylinder and the inner cylinder, resulting in inoperability, is almost eliminated. Furthermore, by forming a taper 6'' on the lower surface of the annular float 6, the volume of the float 6 is ensured, and at the same time, the minimum amount of accumulated liquid necessary for the vertical movement of the float 6 is secured, and the lower cylinder of the outer cylinder 1 is Since the wall 9 is also tapered, the oil content S
Stagnation of S in the suction device can be prevented as much as possible.

Further, by configuring the float 6 as described above, the float 6 can be designed to be appropriately large, and it is easy to configure it into a large-capacity suction device.

FIG. 2 shows a schematic longitudinal sectional view of another embodiment of the suction device of the invention. The suction device A' of this embodiment has a notch recess 11 formed in the upper edge of the suction funnel 4 of the inner cylinder 3.

When the cutout recess is formed in this manner, the suction force of the surface liquid from this portion increases, thereby making it possible to improve the suction fluidity of highly viscous oil and the like. Furthermore,
By attaching a heater 11' connected to a heating source (not shown) near the four notches 11, it is possible to increase the fluidity of high viscosity oil passing through the notch recess 11 and maintain suction smoothly. .

Next, FIG. 3 shows a schematic vertical sectional view of a suction device B in which a solidified oil crushing tool C is attached to the suction device A or A' of the present invention shown in FIG. 1 or 2, and FIG. The plan view is shown.

The main body A of the suction device B shown in this embodiment is the same as the suction device 6 shown in FIG. That is, the arm 12 is placed around the outer circumference of the suction device main body A, and its terminal portion 12'
is fixed to the outer cylinder 1 of the suction device main body A by screws 13 or the like, and a motor 14 is mounted on the upper surface of the arm 12, and an eccentric shaft 16 connected to the reducer 15 of the motor 14 A U-shaped crusher 17 that rotates eccentrically is installed vertically, and a cutting blade 18 is formed at the tip of the U-shaped crusher 17. The shape of the cutting blade 18 may be any shape as long as it can effectively crush the solid oil on the surface layer, and is not limited to the comb-like protrusions as shown. However, the position of the cutting blade 18 is such that the outer cylinder l of the suction device body A is at the liquid level (W).

■,) When it is fixed to the lower layer, it is natural that it needs to be set in a position where it comes into contact with the solid oil on the surface layer, and the mounting thickness of the cutting blade 18 must be set so that it is easy to scrape the solid oil inside. Adjustment is desirable.

When such a solidified oil crusher C is provided in the suction device main body A, it can also be used to remove solidified oil on the surface layer that has no fluidity or oil that has reduced fluidity by forming a highly viscous oil film. This can be effectively crushed to give fluidity and to make it easy to suction.

In FIG. 3, reference numeral 19 denotes a pipe connected to the discharge port 2 of the outer cylinder 1, which is normally connected to an oil-water flotation tank (not shown).

[Brief explanation of drawings]

FIG. 1 shows a longitudinal cross-sectional view of the surface liquid suction device of the present invention, +
8) shows a state in which surface liquid is being suctioned, and (b) shows a state in which it is not being suctioned. FIG. 2 is a longitudinal sectional view showing another embodiment of the present invention, and FIG. 3 is a solid state. FIG. 4 shows a longitudinal sectional view of the surface liquid suction device of the present invention equipped with a converted oil crusher, and FIG. 4 shows a plan view thereof. 1... Outer cylinder, 2... Discharge port, 3...
...Inner cylinder, 4...Suction funnel, 5...
Water passage, 6...Float, 7...Weight, lO...Liquid storage chamber, 11...Notch recess, 17... Crushing machine. Patent applicant Maru Satoshi Kouken Co., Ltd. (b) Figure 4

Claims (1)

[Scope of Claims] (11 An outer cylinder with an open port at the upper end and a discharge port at the lower end, a passage formed in the center, and an open port at the upper end at one end of the passage for suction) A surface liquid suction device characterized in that an inner cylinder is provided with a funnel, and a float is arranged around the water passageway at the bottom of the suction funnel, and an inner cylinder is slidably fitted into the outer cylinder. (2) ) The surface liquid suction device according to claim 1, characterized in that a notched recess is formed in the upper edge of the suction funnel. (3) A heater is provided near the notched recess. The surface liquid suction device according to claim 2. (4) The surface liquid suction device according to claim 2. The surface liquid suction device according to claims 1 to 3. (5) The upper edge of the outer cylinder is bent inward to form a sliding guide for the inner cylinder. 1
The surface liquid suction device according to items 4 to 4. C6) In an outer cylinder with an open port at the top and a discharge port at the bottom end, a passageway is formed in the center, and a suction funnel with an open top at the top end of the passageway is provided. An inner cylinder having a float ringed at the lower part and around the water passage is slidably inserted into the outer cylinder, and a solidified oil crushing tool having a cutting blade attached to the tip is inserted into the outer cylinder through an arm. A surface liquid suction device characterized by being attached to a cylinder.