Acidification device for wastewater treatment and wastewater treatment system

Abstract

The utility model provides an acid precipitation device for wastewater treatment and a wastewater treatment system, and relates to the technical field of wastewater treatment, acid wastewater and alkaline wastewater are put into a mixing tank to carry out acid precipitation reaction, the reacted liquid enters a separation tank, cellulose is separated through a slag scraping component, the separated liquid enters a clean water tank, and the clean water tank is communicated with the separation tank. The whole device can control the PH of effluent, reduce the COD (Chemical Oxygen Demand) of stock solution drainage and reduce the sewage load, and the technical problems that the COD of stock solution workshop glue-containing wastewater drainage is higher and the impact on the sewage load is larger in the fiber production process in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to an acid precipitation device for wastewater treatment and a wastewater treatment system. Background Art

[0002] At present, the treatment method for the raw liquid wastewater containing glue generated in the viscose fiber production process is generally to directly discharge it into the sewage treatment plant for acid-base neutralization, precipitation, and biochemical treatment.

[0003] However, the existing problem is that the mixed pH value of acidic water and alkaline water fluctuates greatly, the addition of alkali fluctuates greatly, the COD of the water entering the biochemical treatment fluctuates greatly, a large amount of organic load cannot be removed in the pretreatment, the pH fluctuates greatly before entering the biochemical pool, and the COD increases greatly, which impacts the biochemical system. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an acid precipitation device for wastewater treatment and a wastewater treatment system, so as to alleviate the technical problems existing in the prior art that the drainage COD of the raw liquid wastewater containing glue in the spinning workshop during the fiber production process is relatively high and has a large impact on the sewage load.

[0005] In the first aspect, the acid precipitation device for wastewater treatment provided by the utility model includes: a mixing tank, a separation tank, a clear water tank, and a slag scraping member;

[0006] The acidic wastewater and the alkaline wastewater are mixed in the mixing tank, and the mixing tank is used for carrying out acid precipitation reaction between the acidic wastewater and the alkaline wastewater;

[0007] The mixing tank is communicated with the separation tank, and the wastewater after the acid precipitation reaction enters the separation tank. The slag scraping member is arranged above the separation tank, and the slag scraping member is used for scraping out and separating the generated cellulose;

[0008] The separation tank is communicated with the clear water tank, the clear water tank has a clear water collection area, and the liquid in the separation tank enters the clear water tank and overflows into the clear water collection area.

[0009] In an optional embodiment,

[0010] The acid precipitation device for wastewater treatment further includes a blanking tank;

[0011] The blanking tank is arranged beside the separation tank, and the cellulose scraped out by the slag scraping member enters the blanking tank.

[0012] In an optional embodiment,

[0013] A hopper is arranged in the blanking tank, and the hopper is used for collecting the cellulose scraped out by the slag scraping member.

[0014] In an alternative embodiment,

[0015] The acid precipitation device for wastewater treatment further includes a feeding device;

[0016] The feeding device is connected to the bottom opening of the hopper, and the feeding device is used to convey the cellulose collected by the hopper.

[0017] In an alternative embodiment,

[0018] A mixing drain port is provided at the bottom of the mixing tank, and the mixing tank is communicated with the separation tank through the mixing drain port;

[0019] A separation drain port is provided at the bottom of the separation tank, and the separation tank is communicated with the clear water tank through the separation drain port.

[0020] In an alternative embodiment,

[0021] A partition is provided in the clear water tank, and the partition is used to divide the inner cavity of the clear water tank into a liquid inlet area and the clear water collection area that communicate with each other;

[0022] The separation drain port is communicated with the liquid inlet area.

[0023] In an alternative embodiment,

[0024] The clear water tank has a clear water drain port, and the clear water drain port is communicated with the clear water collection area.

[0025] In an alternative embodiment,

[0026] Covers are provided on the tops of both the mixing tank and the separation tank, and the covers are used to enclose the mixing tank and the separation tank.

[0027] In an alternative embodiment,

[0028] The slag scraping member is provided as a chain plate type slag scraper.

[0029] In a second aspect, the wastewater treatment system provided by the present utility model includes the acid precipitation device for wastewater treatment.

[0030] The acid precipitation device for wastewater treatment provided by the present utility model puts acidic wastewater and alkaline wastewater into the mixing tank to carry out acid precipitation reaction. The liquid after the reaction enters the separation tank, and the cellulose is separated by the slag scraping component. The separated liquid enters the clear water tank and overflows into the clear water collection area. The liquid in the clear water collection area is discharged and then treated in the sewage treatment plant. The overall device can control the pH of the effluent, reduce the COD of the original liquid drainage, reduce the sewage load, and alleviate the technical problems existing in the prior art that the COD of the sizing wastewater drainage in the original liquid workshop during the fiber production process is relatively high, causing a large impact on the sewage load. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 FIG. 1 is a schematic diagram of the overall structure of the acid precipitation device for wastewater treatment provided by an embodiment of the present utility model;

[0033] Figure 2 FIG. 2 is Figure 1 a sectional view taken along line A-A in FIG. 1;

[0034] Figure 3 FIG. 3 is Figure 1 a sectional view taken along line B-B in FIG. 1;

[0035] Figure 4 FIG. 4 is Figure 1 a sectional view taken along line C-C in FIG. 1;

[0036] Figure 5 FIG. 5 is Figure 1 a sectional view taken along line D-D in FIG. 1;

[0037] Figure 6 FIG. 6 is Figure 1 a sectional view taken along line E-E in FIG. 1;

[0038] Figure 7 FIG. 7 is a flow block diagram of the acid precipitation device for wastewater treatment provided by an embodiment of the present utility model.

[0039] Reference numerals: 100 - mixing tank; 110 - mixing drain outlet; 200 - separation tank; 210 - separation drain outlet; 300 - clear water tank; 310 - partition board; 320 - liquid inlet area; 330 - clear water collection area; 340 - clear water drain outlet; 400 - slag scraping component; 500 - blanking tank; 510 - hopper; 520 - feeding device; 600 - cover plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0041] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0042] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0043] The following will describe in detail the specific implementation manners of the present utility model in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model and are not used to limit the present utility model.

[0044] In the process of viscose fiber production, the treatment method of the waste water containing glue in the stock solution is generally to directly discharge it into the sewage treatment plant for acid-base neutralization, precipitation, and biochemical treatment. However, due to the large fluctuations in the pH value and COD in the sewage, directly entering the sewage treatment plant for treatment will cause an excessive load on the sewage treatment plant.

[0045] In view of this, as Figure 1 、 Figure 7 shown, the acid precipitation device for waste water treatment provided in this embodiment includes: a mixing tank 100, a separation tank 200, a clear water tank 300, and a slag scraping member 400; acidic waste water and alkaline waste water are mixed in the mixing tank 100. The acidic waste water is introduced into the mixing tank 100 from the spinning workshop, and the alkaline waste water is introduced into the mixing tank 100 from the stock solution workshop by a pump. In the mixing tank 100, the acidic waste water and the alkaline waste water undergo an acid precipitation reaction.

[0046] The mixing tank 100 is connected to the separation tank 200, and the wastewater after the acid precipitation reaction enters the separation tank 200.

[0047] The slag scraping member 400 is arranged above the separation tank 200. The slag scraping member 400 scrapes out and separates the generated cellulose. The slag scraping member 400 is set as a chain plate type slag scraper.

[0048] Considering that the concentration of the original dilute glue water is high and the water volume is relatively small, the high-load water is acid-precipitated first. The difficult-to-biodegradable cellulose and hemicellulose are acid-precipitated and removed in the mixing tank 100 first, reducing the load of the incoming biochemical treatment. Subsequently, it is scraped out by the slag scraping member 400, reducing the COD of the water in the separation tank 200.

[0049] The separation tank 200 is connected to the clean water tank 300. The clean water tank 300 has a clean water collection area 330. The liquid in the separation tank 200 enters the clean water tank 300 and overflows into the clean water collection area 330. The liquid in the clean water collection area 330 is discharged through a pipeline and sent to the sewage treatment plant for treatment. Since the COD content of the liquid at this time is relatively low, the load of the sewage treatment plant is effectively reduced.

[0050] The mixing tank 100, the separation tank 200 and the clean water tank 300 adopt a reinforced concrete structure, which is more firm.

[0051] The acid precipitation device for wastewater treatment provided in this embodiment puts acidic wastewater and alkaline wastewater into the mixing tank 100 to carry out an acid precipitation reaction. The reacted liquid enters the separation tank 200. The cellulose is separated by the slag scraping member 400. The separated liquid enters the clean water tank 300 and overflows into the clean water collection area 330. The liquid in the clean water collection area 330 is discharged and then sent to the sewage treatment plant for treatment. The overall device can control the pH of the effluent, can also reduce the COD of the original liquid drainage, reduce the sewage load, and alleviate the technical problems existing in the prior art that the COD of the glue-containing wastewater drained from the original liquid workshop in the fiber production process is relatively high and has a large impact on the sewage load.

[0052] On the basis of the above embodiment, as Figure 6 shown, in an optional implementation manner, the acid precipitation device for wastewater treatment provided in this embodiment further includes a blanking tank 500; the blanking tank 500 is arranged beside the separation tank 200, and the cellulose scraped out by the slag scraping member 400 enters the blanking tank 500.

[0053] Specifically, the blanking tank 500 is arranged side by side with the separation tank 200 and is connected to each other. The cellulose is scraped off by the slag scraping member 400 and enters the blanking tank 500.

[0054] In addition, optionally, a cofferdam and a ditch are provided in the drop pool 500 to prevent water from dripping during the transportation of the top waste residue, and to collect the water into the sewage ditch for treatment.

[0055] In an optional embodiment, a hopper 510 is provided in the drop pool 500, and the hopper 510 is used to collect the cellulose scraped out by the scraping member 400, and the acid precipitation device for wastewater treatment also includes a feeding device 520; the feeding device 520 is connected to the bottom opening of the hopper 510, and the feeding device 520 is used to transport the cellulose collected by the hopper 510.

[0056] Specifically, the feeding device 520 is specifically configured as an auger, and the feeding inlet end of the feeding device 520 is connected to the bottom of the hopper 510. The hopper 510 is funnel-shaped. The cellulose scraped off by the scraping component 400 falls freely into the hopper 510 and falls onto the feeding device 520 by gravity. The feeding device 520 is used to transport the cellulose waste to a vehicle and then transport it out.

[0057] like Figure 4 , Figure 5 As shown, in an optional embodiment, a mixing drain port 110 is provided at the bottom of the mixing tank 100 , and the mixing tank 100 is connected to the separation tank 200 through the mixing drain port 110 , and the liquid in the mixing tank 100 enters the separation tank 200 through the mixing drain port 110 .

[0058] A separation drain port 210 is provided at the bottom of the separation tank 200 . The separation tank 200 is connected to the clean water tank 300 through the separation drain port 210 . The liquid in the separation tank 200 enters the clean water tank 300 through the separation drain port 210 .

[0059] like Figure 2 , Figure 3 As shown, in an optional embodiment, a partition 310 is provided in the clean water tank 300 , and the partition 310 is used to separate the inner cavity of the clean water tank 300 into a liquid inlet area 320 and a clean water collection area 330 which are interconnected; the separation drain port 210 is connected to the liquid inlet area 320 .

[0060] Specifically, a partition 310 is fixedly installed in the clean water tank 300. The partition 310 and the clean water tank 300 are an integrated structure. The height of the partition 310 is lower than the height of the wall of the clean water tank 300. The liquid entering from the separation tank 200 gathers in the liquid inlet area 320, and the liquid level gradually increases. After the liquid level is higher than the partition 310, the liquid in the liquid inlet area 320 enters the clean water collection area 330.

[0061] In an optional embodiment, the clean water tank 300 has a clean water drain outlet 340 , which is connected to the clean water collection area 330 , and the liquid in the clean water collection area 330 is discharged through the clean water drain outlet 340 .

[0062] In an alternative embodiment, cover plates 600 are provided at the tops of the mixing tank 100 and the separation tank 200, and the cover plates 600 are used to enclose the mixing tank 100 and the separation tank 200.

[0063] Specifically, a cover plate 600 is provided at the top of the mixing tank 100. The cover plate 600 covers the mixing tank 100 to completely enclose the mixing tank 100. A ventilation opening is provided on the cover plate 600 of the mixing tank 100 to discharge the waste gas in the mixing tank 100 into the waste gas workshop.

[0064] A cover plate 600 is provided at the top of the separation tank 200. The cover plate 600 covers the separation tank 200. In order to prevent the cover plate 600 from affecting the normal operation of the slag scraping member 400, the height of the cover plate 600 on the separation tank 200 is relatively high, and a part of the slag scraping member 400 is accommodated, and the other part of the slag scraping member 400 extends out from the opening on the side of the cover plate 600 to ensure the normal operation of the slag scraping member 400 and prevent the cover plate 600 from affecting the slag scraping member 400.

[0065] Similarly, a ventilation opening is provided on the cover plate 600 at the top of the separation tank 200 to discharge the waste gas in the separation tank 200 into the waste gas workshop.

[0066] The acid precipitation device for wastewater treatment provided in this embodiment can effectively reduce the impact of the wastewater in the raw liquid workshop on the sewage treatment plant. According to the small-scale test, the COD discharge in the raw liquid workshop can be reduced by 50%, effectively reducing the load of the sewage treatment plant.

[0067] The wastewater treatment system provided in this embodiment includes the acid precipitation device for wastewater treatment provided in the above embodiment.

[0068] Since the technical effects of the wastewater treatment system provided in this embodiment are the same as those of the acid precipitation device for wastewater treatment provided in the above embodiment, they will not be elaborated here.

[0069] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An acid precipitation device for wastewater treatment, characterized in that: include: A mixing tank (100), a separation tank (200), a clean water tank (300) and a scraping component (400); Acidic wastewater and alkaline wastewater are mixed in the mixing tank (100), and the mixing tank (100) is used to cause the acidic wastewater and the alkaline wastewater to undergo an acid precipitation reaction; The mixing tank (100) is connected to the separation tank (200), and the wastewater after the acid precipitation reaction enters the separation tank (200). The scraping member (400) is arranged above the separation tank (200), and the scraping member (400) is used to scrape and separate the cellulose generated by the reaction; The separation tank (200) is connected to the clean water tank (300), and the clean water tank (300) has a clean water collection area (330). The liquid in the separation tank (200) enters the clean water tank (300) and overflows into the clean water collection area (330).

2. The acid precipitation device for wastewater treatment according to claim 1, characterized in that: The acid precipitation device for wastewater treatment also includes a material drop pool (500); The material drop pool (500) is arranged beside the separation pool (200), and the cellulose scraped out by the scraping member (400) enters the material drop pool (500).

3. The acid precipitation device for wastewater treatment according to claim 2, characterized in that: A hopper (510) is arranged in the drop pool (500), and the hopper (510) is used to collect cellulose scraped out by the scraping member (400).

4. The acid precipitation device for wastewater treatment according to claim 3, characterized in that: The acid precipitation device for wastewater treatment further comprises a feeding device (520); The feeding device (520) is connected to the bottom opening of the hopper (510), and the feeding device (520) is used to transport the cellulose collected by the hopper (510).

5. The acid precipitation device for wastewater treatment according to claim 1, characterized in that: A mixing drain port (110) is provided at the bottom of the mixing tank (100), and the mixing tank (100) is connected to the separation tank (200) through the mixing drain port (110); A separation drain port (210) is provided at the bottom of the separation tank (200), and the separation tank (200) is connected to the clean water tank (300) through the separation drain port (210).

6. The acid precipitation device for wastewater treatment according to claim 5, characterized in that: A partition (310) is provided in the clean water tank (300), and the partition (310) is used to separate the inner cavity of the clean water tank (300) into a liquid inlet area (320) and the clean water collection area (330) which are interconnected; The separation drain port (210) is in communication with the liquid inlet area (320).

7. The acid precipitation device for wastewater treatment according to claim 6, characterized in that: The clean water pool (300) has a clean water outlet (340), and the clean water outlet (340) is connected to the clean water collection area (330).

8. The acid precipitation device for wastewater treatment according to claim 1, characterized in that: A cover plate (600) is provided on the top of each of the mixing tank (100) and the separation tank (200), and the cover plate (600) is used to seal the mixing tank (100) and the separation tank (200).

9. The acid precipitation device for wastewater treatment according to any one of claims 1 to 8, characterized in that: The scraper component (400) is configured as a chain plate type scraper.

10. A wastewater treatment system, characterized in that: It comprises the acid precipitation device for wastewater treatment as described in any one of claims 1 to 9.

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