Separation device for desorption filtrate

Abstract

The present invention relates to a separation device for filtrate separation, and more specifically, comprises a separation chamber having a separation space formed therein, a separation screen having a plurality of separation holes and installed in the separation space, a scraping part rotatably installed in the separation chamber to scrape the inner surface of the separation screen, a separation driving part for rotating the scraping part, a filtrate supply part for supplying the filtrate to the upper part of the separation space, a filtrate discharge part for discharging the separated liquid that has passed through the separation holes of the separation screen, and a solid discharge part for discharging the solid separated from the separation screen. According to the present invention as described above, the filtrate from which solids have been separated by a sedimentation tank is supplied from the upper side to the lower side, and the included solids are separated again, thereby improving the sedimentation efficiency of the solids by their own weight.

Description

Technology Field

[0001] The present invention relates to a separation device, and more specifically, to a separation device for a liquid filtrate in which solids are separated by a sedimentation tank, the liquid filtrate is supplied from the upper side to the lower side, and the contained solids are separated again to improve the sedimentation efficiency of the solids by their own weight. Background Technology

[0002] Generally, the filtrate discharged during the food waste dehydration process consists of water, suspended solids, and oil. Since the oil exists stably in the water layer in an emulsion state and the suspended solids are dispersed as fine particles, it is difficult to separate the oil and suspended solids from the filtrate by conventional methods.

[0003] To date, various methods for disposing of food waste are known, including the following.

[0004] First, direct burial underground is possible, but it is prohibited due to problems with odor and groundwater contamination.

[0005] Secondly, although it can be sterilized at high temperatures and utilized as animal feed, this method is not practical in the metropolitan area due to severe odors, reduced nutritional value, limited demand, and issues with fuel costs and condensate treatment.

[0006] The third method involves composting food waste by mixing it with a composting agent; however, this method is not very effective in the metropolitan area due to issues such as severe odors, poor composting caused by salt and oil, salt accumulation in farmland, and a shortage of suitable land for application.

[0007] The fourth method involves separating solids and liquids, incinerating the dewatered sludge, and introducing the filtrate into the sewage treatment plant. This treatment method also requires resolving odor issues, expanding incinerators and sewage treatment plants, re-evaluating the total phosphorus (TP) and total nitrogen (TN) treatment methods at the plants, and making additional facility investments in the long term.

[0008] Next is a method of solid-liquid separation where the dewatered sludge is composted and the filtrate is treated separately. Composting of dewatered sludge

[0009] Since most salt and oil are removed in the dewatering liquid during the process, issues regarding salt accumulation and process maturation can be resolved. Additionally, because the amount of dewatered sludge is reduced by 20–40%, relocating the facility to the outskirts of the city can secure agricultural land for spraying and reduce odor complaints. Furthermore, it is highly economical as waste is converted into resources. However, regarding the treatment of the dewatering liquid, while it was previously possible to dispose of it by ocean dumping, its disposal has become an urgent task now that a ban on ocean dumping has been confirmed.

[0010] Looking at the water quality characteristics of the food waste leachate, the total solids (TS) concentration is 80,000–150,000 mg / ℓ, CODcr concentration is 100,000–250,000 mg / ℓ, BOD concentration is 50,000–100,000 mg / ℓ, total nitrogen (TN) concentration is 2,000–4,000 mg / ℓ, salinity concentration is 8,000–10,000 mg / ℓ, total phosphorus (TP) concentration is 600–800 mg / ℓ, and oil concentration is 5,000–15,000 mg / ℓ, which is very high. In addition, acid fermentation occurs during the collection process, resulting in a very low pH concentration of 3.0–4.0. Since these concentrations are 500 to 2,000 times higher than those of sewage, if these concentrations are not lowered and neutralized during the pretreatment process, problems arise such as increased treatment costs and land area, and reduced treatment efficiency.

[0011] In addition, since the filtrate from food waste contains a high concentration of solids, it must be separated and dewatered; however, it does not react well with chemicals, and a large amount of sludge is generated due to aggregation.

[0012] The sludge generated in such large quantities cannot be landfilled due to groundwater contamination issues and is therefore either composted or transported to an incinerator for incineration. However, this sludge has high salt concentration and moisture content, as well as high concentrations of animal and plant fats, which causes many problems during composting and incineration.

[0013] Therefore, from an economic and environmental protection perspective, it is urgently necessary to reduce the amount of sludge generated during the treatment process of food waste leachate. Prior art literature

[0015] Korean Patent Publication No. 10-2015-0114157 The problem to be solved

[0016] Accordingly, the present invention has been devised to resolve the aforementioned problems, and aims to provide a separation filtrate separation device that can improve sedimentation efficiency of solids by separating solids by separating solids again, comprising: a separation chamber having a separation space formed therein; a separation screen installed in the separation space having a plurality of separation holes; a scraping part rotatably installed in the separation chamber to scrape the inner surface of the separation screen; a separation driving part for rotating the scraping part; a filtrate supply part for supplying the separation filtrate to the upper part of the separation space; a filtrate discharge part for discharging the separation liquid that has passed through the separation holes of the separation screen; and a solid discharge part for discharging solids separated from the separation screen, wherein the separation filtrate from which solids have been separated by a sedimentation tank is supplied from the upper side to the lower side and the included solids are separated again. means of solving the problem

[0017] The present invention for achieving the above objective comprises: a separation chamber having a separation space formed therein; a separation screen having a plurality of separation holes and installed in the separation space; a scraping part rotatably installed in the separation chamber to scrape the inner surface of the separation screen; a separation driving part for rotating the scraping part; a liquid supply part for supplying a separated liquid to the upper part of the separation space; a liquid discharge part for discharging the separated liquid that has passed through the separation holes of the separation screen; and a solid discharge part for discharging the solid separated from the separation screen.

[0018] Preferably, the separation chamber comprises an upper separation chamber having a separation space formed therein, a lower separation chamber provided on the lower side of the upper separation chamber having a sedimentation space formed therein that communicates with the separation space, and an internal inspection section formed in the upper separation chamber so that the separation space can be checked from the outside.

[0019] And the above internal verification unit is formed as an internal verification window at least once in the upper separation chamber to check the state of the separation space unit.

[0020] Additionally, the separation screen comprises a plurality of screen frames arranged at regular intervals, a plurality of vertical screen frames arranged at regular intervals along the circumferential direction to connect the plurality of screen frames, and horizontal screen rings arranged at regular intervals along the arranged vertical screen frames.

[0021] And it further includes a screen fixing part that fixes each of the above horizontal screen rings to the above vertical screen frame.

[0022] Additionally, the screen fixing part includes a screen fixing groove formed in the vertical screen frame and a screen fixing projection formed to protrude along the outer surface of each horizontal screen ring to correspond to the screen fixing groove, and the screen fixing groove and the screen fixing projection are welded.

[0023] And the scraping section comprises a pair of scraper fixing plates rotatably installed at the upper center and lower center of the separation space section, a plurality of scraper fixing frames installed at regular intervals to connect the pair of scraper fixing plates, a scraper installation frame fixed to each of the scraper fixing frames at an angle, a scraper for scraping the inner surface of the separation screen, and a scraper fixing section for fixing the scraper to the corresponding scraper installation frame so as to be detachably attached.

[0024] Additionally, each of the above scraper installation frames is composed of a pair spaced apart at a certain interval, and the scraper is positioned between the pair of scraper installation frames and fixed by a scraper fixing part.

[0025] And further includes a cleaning unit for cleaning the above separation screen.

[0026] In addition, the cleaning unit is installed in multiple units in the separation chamber as an ultrasonic vibration unit that generates ultrasonic vibrations to separate foreign substances caught on the separation screen.

[0027] And further includes a second washing unit for washing the above separation screen.

[0028] Additionally, the second washing unit comprises a plurality of washing nozzles installed in the scraping unit so as to face the inner surface of the separation screen, and a washing water supply unit for supplying washing water to the washing nozzles.

[0029] And the above cleaning nozzle is installed inside one or more of the above pair of scraper installation frames and sprays cleaning water.

[0030] In addition, it further includes a microbubble generating unit for generating microbubbles at the lower part of the separation space.

[0031] And the above-mentioned microbubble generator instantaneously generates ultrasound of a certain frequency to separate the gas contained in the liquid, thereby generating microbubbles and causing the floating solids to float. Effects of the invention

[0032] According to the separation device for the filtrate of the present invention, the filtrate from which solids have been separated by a sedimentation tank is supplied from the upper side to the lower side, and the contained solids are separated again, thereby enabling the sedimentation efficiency of the solids to be improved by their own weight. This is a very useful and effective invention. Brief explanation of the drawing

[0033] FIG. 1 is a drawing illustrating a separation device for a filtrate according to the present invention, and FIG. 2 is a side view of a separation device for a filtrate according to the present invention, and FIG. 3 is a drawing illustrating a separation screen and a scraping unit according to the present invention, and FIG. 4 is a drawing showing an enlarged view of a separation screen according to the present invention, and FIG. 5 is a drawing illustrating a scraping part according to the present invention, and FIG. 6 is a plan view of a separation device for a deliquent according to the present invention, and FIG. 7 is a drawing illustrating a state in which a washing unit is further provided in a separation device for filtrate according to the present invention. Specific details for implementing the invention

[0034] Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. The detailed description disclosed below, together with the accompanying drawings, is intended to describe exemplary embodiments of the present invention and is not intended to represent the only embodiment in which the present invention may be practiced. The following detailed description includes specific details to provide a complete understanding of the present invention. However, those skilled in the art will know that the present invention may be practiced without such specific details.

[0035] In some cases, to avoid obscuring the concept of the present invention, known structures and devices may be omitted or illustrated in the form of a block diagram focusing on the core functions of each structure and device.

[0036] Throughout the specification, when a part is described as "comprising" or "including" a component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Furthermore, the term "...part" as used in the specification refers to a unit that performs at least one function or operation. Additionally, "one (a or an)," "one," "the," and similar related terms may be used in the context describing the invention (particularly in the context of the following claims) to include both singular and plural forms, unless otherwise indicated in the specification or clearly contradicted by the context.

[0037] In describing the embodiments of the present invention, specific descriptions of known functions or configurations will be omitted if it is determined that such detailed descriptions could unnecessarily obscure the essence of the invention. Furthermore, the terms described below are defined in consideration of their functions in the embodiments of the present invention, and these definitions may vary depending on the intentions or practices of the user or operator. Therefore, such definitions should be based on the content throughout this specification.

[0038] Hereinafter, preferred embodiments of the present invention will be described with reference to the attached drawings.

[0039] FIG. 1 is a drawing illustrating a separation device for a filtrate according to the present invention, FIG. 2 is a side view illustrating a separation device for a filtrate according to the present invention, FIG. 3 is a drawing illustrating a separation screen and a scraping section according to the present invention, FIG. 4 is a drawing illustrating an enlarged view of a separation screen according to the present invention, FIG. 5 is a drawing illustrating a scraping section according to the present invention, FIG. 6 is a top view illustrating a separation device for a filtrate according to the present invention, and FIG. 7 is a drawing illustrating a state in which a washing section is further provided in the separation device for a filtrate according to the present invention.

[0040] As illustrated in the drawing, the separation device (10) includes a separation chamber (100), a separation screen (200), a scraping section (300), a separation drive section (400), a filtrate supply section (500), a filtrate discharge section (600), and a solid discharge section (700).

[0041] In the present invention, the separation chamber (100) has a separation space formed inside, forms an outer shape, and is installed to be erected by an installation frame.

[0042] And the separation screen (200) is cylindrical and has a plurality of separation holes (202), and is installed in the separation space.

[0043] The scraping part (300) is rotatably installed in the separation chamber (100) to scrape the inner surface of the separation screen (200).

[0044] In addition, the separation drive unit (400) rotates the scraping unit (300) and is installed at the upper end of the separation chamber (100).

[0045] The liquid supply unit (500) is for supplying the separated liquid to the upper part of the separation space, and the supplied separated liquid is supplied into the interior of the separation screen (200).

[0046] And the liquid discharge section (600) is for the separated liquid that has passed through the separation hole (202) of the separation screen (200) to be discharged, and the separated liquid is discharged.

[0047] A solid discharge unit (700) is installed at the bottom of the separation chamber (100) so that the solid separated from the separation screen (200) is discharged.

[0048] For this purpose, the separation chamber (100) is cylindrical and includes an upper separation chamber (110), a lower separation chamber (120), and an internal inspection section (130).

[0049] The upper separation chamber (110) forms a separation space inside.

[0050] And the lower separation chamber (120) is provided on the lower side of the upper separation chamber (110), and a sedimentation space is formed inside that communicates with the separation space.

[0051] The upper separation chamber (110) and lower separation chamber (120) are fixed to each other by a flange.

[0052] The internal inspection section (130) is formed in the upper separation chamber (110) so that the separation space section can be checked from the outside.

[0053] Here, the internal inspection section (130) is an internal inspection window, and at least one is formed in the upper separation chamber (110) to check the state of the separation space section (102).

[0054] In one embodiment, as shown in FIG. 2, an internal inspection window is formed on the front and rear of the separation chamber (100), respectively, to check the state of the separation space and to check the state of the scraping section (300) and the separation screen (200) in real time.

[0055] As shown in FIG. 3, the separation screen (200) includes a screen frame (210), a vertical screen frame (220), and a horizontal screen ring (230).

[0056] The screen frames (210) are arranged in multiple numbers at regular intervals and are arranged in an up-and-down direction.

[0057] And the vertical screen frames (220) are arranged in multiple numbers at regular intervals along the circumferential direction to connect multiple screen frames (210).

[0058] The horizontal screen rings (230) are arranged at regular intervals along the arranged vertical screen frames (220), and are arranged at regular intervals in the vertical direction along the length direction of the vertical screen frames (220).

[0059] Accordingly, a separation hole (202) is formed between the screen frames (210) and the vertical screen frames (220).

[0060] Looking more closely at this, the inner surfaces of the plurality of vertical screen frames (220) are arranged to be located on the same plane as the inner surface of the screen frame (210), and the horizontal screen ring (230) is arranged to be located inside the plurality of vertical screen frames (220).

[0061] Here, it is preferable that the inner surface of each horizontal screen ring (230) be formed as a surface having a certain arc to correspond to the scraping part (300).

[0062] And, as illustrated in FIG. 4, it further includes a screen fixing part (240) that fixes each horizontal screen ring (230) to a vertical screen frame (220).

[0063] This screen fixing part (240) includes a screen fixing groove (242) and a screen fixing projection (244).

[0064] The screen fixing groove (242) is formed in the vertical screen frame (220).

[0065] And the screen fixing projection (244) is formed to protrude along the outer surface of each horizontal screen ring (230) so as to correspond to the screen fixing groove (242).

[0066] After the screen fixing projection (244) of the horizontal screen ring (230) is seated in the screen fixing groove (242) of the vertical screen frame (220), it is welded.

[0067] And the separation drive unit (400) is installed on the upper side of the separation chamber (100) to rotate the scraping unit (300), and the scraping unit (300) rotates a rotating shaft integrally formed at the upper end.

[0068] The scraping section (300) is equipped with a plurality of scrapers (340) for scraping the separation screen (200).

[0069] As shown in FIG. 5, this scraping part (300) includes a scraper fixing plate (310), a scraper fixing frame (320), a scraper installation frame (330), a scraper (340), and a scraper fixing part (350).

[0070] The scraper fixing plate (310) is installed as a pair, rotatably at the upper center and lower center of the separation space.

[0071] Each of these scraper fixing plates (310) has a plurality of through holes (312) formed inside, and the liquid supplied from the liquid supply unit (500) passes through the through holes (312) of the scraper fixing plate (310) located at the upper center, and the solid matter passes downward through the through holes (312) of the scraper fixing plate (310) located at the lower center and is discharged.

[0072] And the scraper fixing frame (320) is installed at regular intervals with a plurality of rods to connect a pair of scraper fixing plates (310).

[0073] The scraper installation frame (330) is fixed to each scraper fixing frame (320) at a certain angle, preferably fixed by welding, and may be installed so as to allow for angle adjustment.

[0074] In addition, the scraper (340) is made of an elastic material and is installed on the scraper installation frame (330) to scrape the inner surface of the separation screen (200).

[0075] The scraper fixing part (350) fixes the scraper (340) to the corresponding scraper installation frame (330) so that it can be attached and detached.

[0076] This scraper fixing part (350) is composed of a bolt and a nut to fix the scraper (340) to the corresponding scraper installation frame (330) so that it can be attached and detached, and the scraper (340) is replaced when it wears out.

[0077] Here, each scraper installation frame (330) is composed of a pair spaced apart at a certain interval, and the scraper (340) is positioned between the pair of scraper installation frames (330) and fixed by the scraper fixing part (350).

[0078] And as illustrated in FIG. 6, the liquid supply unit (500) is installed to supply the separated liquid to the inner side of the upper part of the separation space, and the liquid discharge unit (600) is installed to discharge from the inner side of the middle part of the separation space.

[0079] Looking more closely at this, the liquid supply unit (500) is installed at the upper part of the upper separation chamber (110), and the liquid discharge unit (600) is installed at the lower part of the upper separation chamber (110).

[0080] Here, in the lower separation chamber (120), the liquid containing the separated solid is separated by the separation screen (200) and the scraping section (300) and moved to the sedimentation space (104), and then transferred to the previous stage sedimentation tank by the solid discharge section (700).

[0081] Accordingly, the separated liquid obtained by settling the solids again in the sedimentation tank is supplied to the separation space through the liquid supply unit (500).

[0082] It also includes a return section (800) for transferring the filtrate separated before the solids are completely settled in the sedimentation space to the previous stage, the sedimentation tank.

[0083] By circulating the filtrate to the previous stage before the solid matter is completely settled by this return section (800), the amount settled in the sedimentation space is partially reduced and circulated to the sedimentation tank, thereby improving the overall treatment efficiency.

[0084] And the separation device (10) further includes a washing unit (900) for washing the separation screen (200), as shown in FIG. 7.

[0085] These cleaning units (900) are installed in the separation chamber (100) as ultrasonic vibration units (902) that generate ultrasonic vibrations to separate foreign substances caught on the separation screen (200).

[0086] These multiple ultrasonic vibration units (902) generate ultrasonic vibrations by the applied power and transmit them to the separation screen (200) to remove solid matter trapped between the screen frames (210) and the vertical screen frames (220).

[0087] And the separation device (10) further includes a second washing unit (910) for washing the separation screen (200).

[0088] This second washing unit (910) includes a washing nozzle (912) and a washing water supply unit (914).

[0089] The cleaning nozzle (912) is installed in the scraping section (300) so as to face the inner surface of the separation screen (200), and at least one is installed.

[0090] In addition, the washing water supply unit (914) supplies washing water to the washing nozzle (912).

[0091] In one embodiment, a cleaning nozzle (912) is installed inside one or more of a pair of scraper installation frames (330), and a cleaning water supply unit (914) supplies cleaning water to the cleaning nozzle (912) through the inside of the scraper fixing plate (310), the scraper fixing frame (320), and the scraper installation frame (330).

[0092] Additionally, the separation device (10) further includes a microbubble generating unit (950) for generating microbubbles at the bottom of the separation space.

[0093] This microbubble generating unit (950) instantaneously generates ultrasonic waves of a certain frequency by the applied power source to separate the gas contained in the liquid, thereby generating microbubbles and causing the floating solids to float.

[0094] It is preferable that at least one such microbubble generating unit (950) be installed in the separation chamber (100). Explanation of the symbols

[0095] 10 : Separator for filtrate separation 100 : Separation chamber 200 : Separation screen 300 : Scraping section 400 : Separate drive unit 500 : Filter supply unit 600 : Liquid discharge section 700 : Solid discharge section 800 : Return section 900 : Washing section 910: Second washing unit 950: Microbubble generating unit

Claims

Claim 1 A separation chamber (100) having a separation space formed inside; a separation screen (200) having a plurality of separation holes and installed in the separation space; a scraping unit (300) rotatably installed in the separation chamber to scrape the inner surface of the separation screen; a separation drive unit (400) for rotating the scraping unit; a liquid supply unit (500) for supplying the separated liquid to the upper part of the separation space; a liquid discharge unit (600) for discharging the separated liquid that has passed through the separation holes of the separation screen; a solid discharge unit (700) for discharging the solid separated from the separation screen; a washing unit (900) for washing the separation screen; and a second washing unit (910) for washing the separation screen. The separation screen (200) includes a microbubble generating unit (950) installed in the separation chamber (100) to generate microbubbles at the lower end of the separation space; the separation screen (200) includes a plurality of screen frames (210) arranged at regular intervals; a plurality of vertical screen frames (220) arranged at regular intervals along the circumferential direction to connect the plurality of screen frames; and a horizontal screen ring (230) arranged at regular intervals along the arranged vertical screen frames; and the scraping unit (300) includes a pair of scraper fixing plates (310) rotatably installed at the upper center and lower center of the separation space; a plurality of scraper fixing frames (320) installed at regular intervals to connect the pair of scraper fixing plates; a scraper installation frame (330) fixed to each scraper fixing frame at a certain angle; and a scraper (340) scraping the inner surface of the separation screen. and a scraper fixing part (350) for fixing the scraper so as to be detachably attached to the scraper installation frame; wherein the cleaning part (900) is installed in the separation chamber (100) in multiple units by means of an ultrasonic vibration part (902) that generates ultrasonic vibration to separate foreign substances caught on the separation screen, and the second cleaning part (910) is installed in the scraping part such that it faces the inner surface of the separation screen by means of multiple cleaning nozzles (912).A separation device for separating filtrate, comprising: a washing water supply unit (914) for supplying washing water to the washing nozzle; wherein the microbubble generating unit (950) is characterized by generating microbubbles to separate the gas contained in the filtrate by instantaneously generating ultrasonic waves of a certain frequency, thereby causing floating solids to float. Claim 2 A separation device according to claim 1, wherein the separation chamber comprises: an upper separation chamber having a separation space formed therein; a lower separation chamber provided on the lower side of the upper separation chamber having a sedimentation space formed therein that communicates with the separation space; and an internal inspection section formed in the upper separation chamber so that the separation space can be checked from the outside. Claim 3 A separation device for filtrate separation according to paragraph 2, wherein the internal verification part is an internal verification window formed in at least one of the upper separation chambers to check the state of the separation space part. Claim 4 delete Claim 5 A separator for filtrate separation according to claim 1, further comprising a screen fixing part for fixing each of the horizontal screen rings to the vertical screen frame. Claim 6 A separation device for filtrate separation according to claim 5, wherein the screen fixing part comprises a screen fixing groove formed in the vertical screen frame; and a screen fixing projection formed to protrude along the outer surface of each horizontal screen ring so as to correspond to the screen fixing groove, and wherein the screen fixing groove and the screen fixing projection are welded. Claim 7 delete Claim 8 delete Claim 9 delete Claim 10 delete

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