JPH04110104U - schizkner - Google Patents

Abstract

(57) [Summary] (with amendments) [Purpose] To provide a thickener that has high separation efficiency, is small in size, can process a large amount of stock solution, can be operated unattended, and has little disturbance of the solution. [Structure] A solid-liquid separation tank with an overflow part 4 at the upper edge and an underflow part K at the lower center includes a dispersion plate and a plurality of vertical settling plates extending radially outward from the center. 21, and the vertical settling plate is configured to be curved in an arc shape when viewed from above.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a thickener that separates solids and liquids by gravity. The supernatant liquid overflows from the upper edge, and the concentrated liquid flows from the lower part. A thickener with a solid-liquid separation tank that is discharged as underflow. - related.

0002

[Conventional technology]

Devices that separate solids and liquids include devices that separate using filter media, and devices that use gravity to separate solids and liquids. Various devices are known, such as devices for separating and devices for separating using centrifugal force. So Thickeners are known as gravity separation devices.

0003 As is well known, the thickener has a cylindrical sedimentation tank that can be rotated near the bottom. It is generally composed of a scraping board provided. Therefore, solid or solid When the processing liquid containing solids is supplied to the sedimentation tank, the solids settle due to gravity and the supernatant The liquid eventually collects in the upper part and the two are separated. The supernatant liquid is then stored in a sedimentation tank. As overflow from the upper edge, the sediment is collected in the center by the scraping board and It is discharged outside as waste flow.

0004 Solid-liquid separation or thickeners as food processing equipment are also known in the art. For example, separation equipment used in bean paste processing also has a sedimentation tank, into which the undiluted solution is supplied. and the bean paste particles settle due to gravity. Therefore, you can get bean paste as a product. .

[0005]

[Problem that the idea aims to solve]

Thickeners like the ones mentioned above separate due to gravity, so they require extra power. It has no advantage. Therefore, as a solid-liquid separator for mining and civil engineering, it is currently It is also frequently used. However, there are various problems. For example, separation efficiency is poor. In order to increase the throughput, the sedimentation tank must be made larger, and the equipment becomes larger and cannot be installed indoors. The problem is that it cannot be installed. In addition, in the thickener for making bean paste, Dissolved proteins are sandwiched between the bean paste particles and precipitate at the same time, so repeat the process 3 to 5 times. Without it, it is not possible to obtain the desired product, for example, a product with a Brix of 0.5% or less. However, it is inefficient and requires a large amount of water for exposure. Furthermore, the undiluted solution Generally, the water is supplied to the sedimentation tank by a pump, but the pulsation of the pump or the vibration of the piping system There is also the disadvantage that the liquid is transmitted to the sedimentation tank, causing the treated liquid to oscillate and reducing the separation efficiency.

[0006] Therefore, the present invention has high separation efficiency, is compact and can handle a large amount of stock solution or slurry. Our goal is to provide a thickener that can be used to process wastewater and to operate unattended. The purpose is More specifically, the settling tank that separates solid and liquid is subject to vibrations from pumps, etc. Even if water is transmitted, there is no disturbance to the liquid in the tank, and when applied to bean paste processing, it can be done with a small amount of water. The purpose of the present invention is to provide a thickener that can produce bean paste of desired quality.

[0007]

[Means to solve the problem]

In order to achieve the above purpose, the present invention is designed to prevent supernatant liquid from overflowing from the upper edge. Also, the concentrated liquid is discharged from below as an underflow. A solid-liquid separation tank and a tank located approximately in the middle of the separation tank to disperse the raw solution to be processed in four directions. a dispersion plate disposed radially from approximately the center of the solid-liquid separation tank toward the outer periphery; , consisting of a plurality of vertical sedimentation plates that separate the supplied stock solution into solid and liquid, and the solid-liquid fraction The separation tank has an approximately conical shape, and a nozzle for discharging the concentrated liquid is connected to its reduced diameter lower end. and the vertical settling plate is curved in one direction in an arc shape when viewed from above. It is composed of sea urchins.

[0008] In addition, in this invention, a discharge pipe whose inclination angle can be changed is connected to the nozzle for discharging the concentrated liquid. By changing the angle of inclination, the water level in the solid-liquid separation tank can be changed, and the Several vertical settling plates are configured to be able to be pulled upward from the solid-liquid separation tank.

[0009]

[Effect] Since the present invention is configured as described above, the stock solution to be processed is continuously converted into solid-liquid. Supplied approximately to the center of the separation tank. Then, the stock solution is dispersed in all directions by the dispersion plate. Ru. At this time, the stock solution is distributed almost evenly between the vertical settling plates, and from the center to the periphery. flows to the department.

0010 By the way, since the vertical settling plate according to the present invention is curved in an arc shape when viewed from above, , when the stock solution flows from the center to the periphery, the flow direction is changed. As a result, specific gravity Larger solids gather toward the surface of the vertical settling plate due to centrifugal force, and the liquid is relatively Gather on the side. The two are then separated.

[0011] The separated solids settle due to gravity and are discharged to the outside through a lower nozzle. On the other hand, the supernatant liquid is similarly discharged to the outside as overflow from the upper edge of the solid-liquid separation tank. be done.

0012 In addition, a discharge pipe whose inclination angle can be changed is connected, and by changing the inclination angle, While the water level of the solid-liquid separation tank is changed, the plurality of vertical settling plates are changed from the solid-liquid separation tank. If it is constructed so that it can be pulled upwards, it will have a discharge pipe whose inclination angle can be changed. In addition to the above-mentioned effects, changing the angle of the discharge pipe will change the water level or operating temperature of the solid-liquid separation tank. The ratio of overflow and underflow changes. Also, pull up the vertical settling plate, The inside of the solid-liquid separation tank can be cleaned.

[0013]

【Example】

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings. In Figure 1, 1 is solid liquid Separation tank is shown.

[0014] The solid-liquid separation tank 1 is composed of a cylindrical part 2 and a conical part 3, as shown in the figure. A weir 4 is provided around the entire circumference on the outside of its upper end. and the weir The overall structure is inclined to one side, and an overflow discharge pipe 5 is connected to the lower end thereof. . In this way, the upper edge of the separation tank 1 serves as an overflow section.

[0015] As shown in the figure, the bottom of the solid-liquid separation tank 1 is tapered in diameter, and its most A nozzle 6 for discharging the concentrated liquid is connected to the lower end, and a leveler three-way cock is attached to this nozzle. A discharge pipe 8 whose inclination angle can be changed is connected via a pipe 7.

[0016] A hopper 10 containing the stock solution is placed above the separation tank 2. A stock solution supply pipe 11 extends from the tank to approximately the center of the solid-liquid separation tank 1, and then hangs downward. I'm under 12. Since the supply pipe is vertical in this way, the stock solution is supplied to separation tank 1. The liquid in the separation tank will not fluctuate even if

[0017] The lower end 13 of the hanging portion of the supply pipe 11 is enlarged in diameter in a bell-mouthed manner. and A dispersion plate 15 for dispersing the stock solution is provided directly below the dispersion plate 15, which can be adjusted vertically between ranges H. It is. This dispersion plate 15 has a chevron shape when viewed from the side, and the stock solution is supplied onto this. Then, the stock solution is evenly distributed in all directions.

[0018] A settling plate hanging fitting 20 is placed on the upper edge of the solid-liquid separation tank 1 . A plurality of vertical settling plates 21, 21, . . . are attached to this metal fitting. Therefore, when the hanging bracket 20 is pulled up, the vertical settling plate is also pulled out from the separation tank. It will be lifted up.

[0019] The vertical settling plates 21, 21... are arranged in the separation tank 1 as shown in FIGS. It extends radially from the center in the circumferential direction, and has approximately the same side shape as separation tank 1. , hanging vertically to intermediate position B of the separation tank. However, if you look at it horizontally, As shown in Figure 2, all vertical settling plates are curved in an arc in the same direction. Ru. Note that the reference numeral 50 in FIG. 1 indicates a leg whose height is freely adjustable.

[0020] Next, the operation of the above embodiment will be explained. The raw solution to be processed is continuously conveyed from the hopper 10. Assume that it is continuously supplied and is in a steady state. The stock solution is in the hanging part of the supply pipe 11 12 toward the distribution plate 15 by gravity. Therefore, according to this example, Then, there is no pulsation caused by the pump for supplying the stock solution.

[0021] The supplied stock solution is dispersed in all directions by the dispersion plate 15 and circulated around the separation tank 1. It flows towards the surrounding area. At this time, the vertical settling plates 21, 21... are curved. As a result, the direction of flow of the stock solution is bent by the sedimentation plate, and centrifugal force is applied. Centrifugal force is specific gravity The solids K act more strongly on the large solids K, so the solids are pushed onto the surface of the concave side of the vertical settling plate. A large amount of liquid gathers on the back side, and the two are separated. separated solids H is discharged from the nozzle 6 through a discharge pipe 8 and a bent pipe 9, for example into a filter bag. The supernatant liquid is discharged from the upper edge of the separation tank 1 as an overflow.

[0022] The water level of separation tank 1 during separation or the ratio of overflow and underflow is shown in the figure. This can be changed by changing the inclination angle θ of the discharge pipe 8 as shown in FIG. Also sedimentation Lift up the plate hanging bracket 20 and remove the vertical settling plates 21, 21... from the separation tank 1. Take it out and clean the inside of the separation tank. According to this embodiment, the stock solution supply pipe 11 and the dispersion plate 15 are also It can be removed at the same time and is easy to clean, making it ideal for food processing that requires strict hygiene control. It is suitable as a thickener for use.

[0023]

[Effect of the idea]

As described above, according to the present invention, the supernatant liquid overflows from the upper edge. Also, solid-liquid separation in which concentrated liquid is discharged from below as an underflow. A dispersion plate is provided approximately in the middle of the tank and the separation tank to disperse the raw solution to be treated in four directions. The stock solution to be processed is evenly distributed in all directions. At this time, the dispersion plate is Since it is located approximately in the middle of the solid-liquid separation tank, it prevents turbulence from occurring in the liquid in the separation tank. Nothing. In addition, inside the solid-liquid separation tank, there are A plurality of vertical sedimentation plates are installed to separate the supplied stock solution into solid and liquid, and the sedimentation plate is Since the descending plates are curved in an arc shape when viewed from above, the solid-liquid is effectively absorbed by these vertical settling plates. efficiently separated. Therefore, a large amount of raw liquid can be processed in a small separation tank. Wear. In addition, the flow direction of the raw solution is bent by the vertical settling plate, so it can be used for example in bean paste manufacturing. When applied, dissolved proteins can also be effectively separated from the bean paste particles. Furthermore Since the vertical settling plates are installed inside the solid-liquid separation tank, the This also suppresses the phenomenon of the liquid in the tank fluctuating.

[0024] According to the present invention as set forth in claim 2, the nozzle for discharging the concentrated liquid has an inclination angle that can be changed automatically. Since the existing exhaust pipe is connected, in addition to the above effects, changing the inclination angle of the exhaust pipe is also possible. The water level in the solid-liquid separation tank is changed by Also, pull up the vertical settling plate and remove it from the separation tank. The inside can be easily cleaned.

[0025] As mentioned above, food processing machines that have various effects need to be installed indoors. For example, 1. Water exposure process in the bean paste and starch industries.

[0026] 2. Separation of supernatant water from raised dough and collection of damaged tofu scraps in the tofu industry.

[0027] 3. Block solid-liquid separation in wastewater treatment.

[0028] 4. Continuation of grit basin for water supply.

[0029] 5. Continuation of the rice togi process and removal of floating impurities in the legume washing process. etc. It is even more effective when applied.

[Brief explanation of drawings]

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

FIG. 2 is a plan view showing a part of it.

FIG. 3 is a side view showing an embodiment of the discharge pipe.

[Explanation of symbols]

1...Solid-liquid separation tank 2...Cylindrical part 3... Conical part 4...Weir 6... Nozzle 8...Discharge pipe 15... Dispersion plate 20...Settlement board hanging metal fittings 21...Vertical settling plate

Claims (2)

[Scope of utility model registration request] 1. A solid-liquid separation tank from which a supernatant liquid is discharged from an upper edge as an overflow and a concentrated liquid from a lower part as an underflow, and a solid-liquid separation tank disposed approximately in the middle of the separation tank, a dispersion plate that disperses the stock solution in four directions, and a plurality of vertical settling plates that are arranged radially from approximately the center of the solid-liquid separation tank toward the outer periphery and separate the supplied stock solution into solid and liquid. The solid-liquid separation tank has a substantially conical shape, and a nozzle for discharging the concentrated liquid is connected to its reduced diameter lower end, and the vertical settling plate has an arcuate shape when viewed from above. A thickener characterized by being curved in one direction. 2. A discharge pipe whose inclination angle can be changed is connected to the concentrate discharge nozzle according to claim 1, and by changing the inclination angle, the water level of the solid-liquid separation tank can be changed. A thickener characterized in that the vertical settling plates can be pulled upward from the solid-liquid separation tank.