Micro-electrolysis device with ultrafiltration function

Abstract

The utility model relates to a micro-electrolysis device with an ultrafiltration function, which comprises a water inlet tank, a solid-liquid separation tank, a water inlet pump, a water producing pump, an ultrafiltration membrane box, a metal iron rod and activated carbon powder, an inlet pipeline of the water producing pump is connected with the ultrafiltration membrane box through a pipeline, and an outlet pipeline is connected with external effluent; the water inlet tank is communicated with the solid-liquid separation tank, the ultrafiltration membrane box is immersed in the solid-liquid separation tank, the metal iron rod is inserted into the ultrafiltration membrane box, the activated carbon powder is distributed in the solid-liquid separation tank, and the metal iron rod and the activated carbon powder form an iron-carbon micro-electrolysis system. Compared with the prior art, the carbon filler is not easy to lose, the iron filler is convenient to replace, the iron-carbon micro-electrolysis treatment effect is good, and the filler cannot be hardened.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment and relates to a micro-electrolysis device with an ultrafiltration function. Background Art

[0002] With the increasing development of science and technology and the rapid improvement of human industrialization, the accompanying environmental pollution problem has become more and more serious, and the types of difficult-to-degrade organic matter produced in industrial production are increasing. For these difficult-to-degrade organic pollutants, traditional biochemical treatment technology has little effect, and iron-carbon micro-electrolysis technology with strong degradation ability stands out in this context.

[0003] Iron-carbon micro-electrolysis technology is a process for treating wastewater by forming a primary cell based on the principle of metal corrosion, also known as internal electrolysis, iron scrap filtration, etc. Iron-carbon micro-electrolysis technology is currently an ideal process for treating high-concentration organic wastewater. It uses the 1.2V potential difference generated by the iron-carbon material filled in the wastewater to electrolyze the wastewater without electricity, so as to achieve the purpose of reducing and degrading organic pollutants.

[0004] In traditional iron-carbon micro-electrolysis technology, as the iron-carbon filler is consumed, the carbon powder in the filler will enter the next process along with the sewage, causing the loss of carbon powder. The loss of carbon powder further aggravates the decomposition of the iron-carbon filler, and ultimately leads to a decrease in the treatment effect of the iron-carbon micro-electrolysis. At the same time, the iron-carbon filler will also become overall compacted, causing the iron-carbon micro-electrolysis equipment to be paralyzed.

[0005] Patent CN219907135U discloses a wastewater pretreatment system with ultrasonic and ultrafiltration functions, including an inlet pool, a solid-liquid separation pool, an ultrafiltration membrane box, an ultrasonic generator, a microporous aerator, a scraping device, a backwash water tank and a Roots blower; when the patent is further applied to the treatment of potato starch extraction wastewater, the potato starch extraction wastewater enters the solid-liquid separation pool from the bottom of the inlet pool, and then passes through the ultrafiltration membrane box to achieve solid-liquid separation; the ultrasonic generator can ultrasonically clean the starch particles and fibers attached to the surface of the ultrafiltration membrane; the microporous aerator can float the fibers in the wastewater to the top of the pool, and play a role in defoaming the wastewater, and at the same time flush the starch particles and fibers attached to the surface of the ultrafiltration membrane; the scraping device discharges the fibers from the equipment; and finally a white starch product is obtained by a sludge pump; the backwash water tank can also realize the backwashing of the ultrafiltration membrane box. However, this patent does not adopt any micro-electrolysis technology structure and does not have the ability to reduce and degrade organic pollutants. Utility Model Content

[0006] The purpose of the present invention is to provide a micro-electrolysis device with ultrafiltration function in order to overcome at least one defect of the above-mentioned prior art. The carbon filler of the present invention is not easy to be lost, the iron filler is easy to replace, the iron-carbon micro-electrolysis treatment effect is good, and the filler will not be compacted.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] One of the technical solutions of the utility model is to provide a micro-electrolysis device with ultrafiltration function, which includes a water inlet tank, a solid-liquid separation tank, a water inlet pump, a water production pump, an ultrafiltration membrane box, a metal iron rod and activated carbon powder, wherein the inlet pipeline of the water inlet pump is connected to external water inlet, the outlet pipeline is connected to the water inlet tank through a pipeline, the inlet pipeline of the water production pump is connected to the ultrafiltration membrane box through a pipeline, and the outlet pipeline is connected to external water outlet;

[0009] The water inlet pool is connected to the solid-liquid separation pool, the ultrafiltration membrane box is immersed in the solid-liquid separation pool, the metal iron rod is evenly inserted in the ultrafiltration membrane box, the activated carbon powder is evenly distributed in the solid-liquid separation pool, and the metal iron rod and the activated carbon powder form an iron-carbon micro-electrolysis system to degrade organic pollutants in the wastewater.

[0010] As a preferred technical solution, the metal iron rods are evenly inserted into the ultrafiltration membrane box from top to bottom.

[0011] Furthermore, the ultrafiltration membrane in the ultrafiltration membrane box intercepts the activated carbon powder in the wastewater, realizes solid-liquid separation and avoids the loss of activated carbon powder, and the filtrate is discharged by the water production pump.

[0012] Furthermore, the ultrafiltration membrane is a hollow fiber membrane.

[0013] As a preferred technical solution, the pore size of the ultrafiltration membrane is 80-120 nm.

[0014] Furthermore, a partition is arranged between the water inlet tank and the solid-liquid separation tank, the first partition near the water inlet tank is fixed to the top of the water inlet tank, the second partition near the solid-liquid separation tank is fixed to the bottom of the solid-liquid separation tank, and the bottom of the first partition is lower than the top of the second partition.

[0015] Furthermore, the wastewater overflows from the bottom of the inlet tank into the solid-liquid separation tank.

[0016] Furthermore, the device also includes a Roots blower and a microporous aerator.

[0017] Furthermore, the microporous aerator is arranged in the solid-liquid separation tank and below the ultrafiltration membrane box, and the microporous aerator and the Roots blower are connected through a pipeline.

[0018] As a preferred technical solution, the microporous aerator is arranged at the bottom of the ultrafiltration membrane box.

[0019] Furthermore, air is introduced into the solid-liquid separation tank by a Roots blower, and forms microbubbles after passing through a microporous aerator, so that the activated carbon powder is evenly dispersed in the solid-liquid separation tank.

[0020] Furthermore, the device also includes a backwash water tank and a backwash water pump.

[0021] Furthermore, the inlet pipeline of the backwash water tank and the outlet pipeline of the water production pump are connected through a pipeline, the outlet pipeline and the inlet pipeline of the backwash water pump are connected through a pipeline, and the outlet pipeline of the backwash water pump and the ultrafiltration membrane box are connected through a pipeline;

[0022] The produced water in the backwash water tank enters the ultrafiltration membrane box through the backwash water pump to achieve backwashing of the ultrafiltration membrane.

[0023] As a preferred technical solution, the pH value of the wastewater is adjusted to 3-5.

[0024] As a preferred technical solution, the hydraulic retention time of the solid-liquid separation tank is 0.5-2h.

[0025] As a preferred technical solution, the mass ratio of activated carbon powder to wastewater in the solid-liquid separation tank is (2-5):100.

[0026] As a preferred technical solution, the area ratio of the metal iron rod to the ultrafiltration membrane is (2.5-4):10.

[0027] As a preferred technical solution, the operation mode of the ultrafiltration membrane includes constant flow or intermittent.

[0028] As a preferred technical solution, the intermittent operation mode of the ultrafiltration membrane is running for 7-9 minutes / resting for 3-5 minutes.

[0029] As a preferred technical solution, the unit water production flow rate of the ultrafiltration membrane corresponds to a membrane area of ​​100-200m 2 .

[0030] As a preferred technical solution, the backwash flux of the ultrafiltration membrane is 50-60L / m 2 ·h.

[0031] As a preferred technical solution, the backwashing method of the ultrafiltration membrane is running for 20-40 minutes / backwashing for 1-3 minutes.

[0032] Compared with the prior art, the utility model has the following beneficial effects:

[0033] (1) The Roots blower and microporous aerator of the utility model can evenly disperse the activated carbon powder around the metal iron rod to form an iron-carbon micro-electrolysis system, which can reduce and degrade organic matter in wastewater. The use of the metal iron rod plus activated carbon powder can completely solve the filler compaction problem existing in the traditional iron-carbon micro-electrolysis;

[0034] (2) In the utility model, the organic wastewater enters the solid-liquid separation tank from the bottom of the water inlet tank, and then the solid-liquid separation is achieved by the ultrafiltration system. The ultrafiltration technology is applied to the iron-carbon micro-electrolysis, which can avoid the problem of reduced iron-carbon micro-electrolysis treatment effect caused by the loss of activated carbon powder;

[0035] (3) When the utility model is applied to the treatment of organic wastewater, only the metal iron rod needs to be replaced regularly, which makes the operation more convenient and eliminates the problem of replacing fillers in traditional iron-carbon micro-electrolysis emptying equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the main structure of a micro-electrolysis device with ultrafiltration function in an embodiment of the utility model;

[0037] Figure 2 It is a schematic diagram of the top view of the structure of a micro-electrolysis device with ultrafiltration function in an embodiment of the utility model.

[0038] Description of the markings in the figure:

[0039] 1—water inlet tank, 2—solid-liquid separation tank, 3—water inlet pump, 4—water production pump, 5—ultrafiltration membrane box, 6—Roots blower, 7—microporous aerator, 8—backwash water tank, 9—backwash water pump, 10—metal iron rod, 11—activated carbon powder. DETAILED DESCRIPTION

[0040] The present invention is described in detail below in conjunction with specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0041] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are used to describe common objects, and only refer to different instances of the same object, and are not intended to imply that the objects described in this way must adopt a given order, whether in time, space, order or any other manner.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Example:

[0044] A micro-electrolysis device with ultrafiltration function, such as Figure 1 and Figure 2 As shown, it is mainly composed of an inlet pool 1, a solid-liquid separation pool 2, an inlet pump 3, a water production pump 4, an ultrafiltration membrane box 5, a Roots blower 6, a microporous aerator 7, a backwash water tank 8, a backwash water pump 9, a metal iron rod 10 and activated carbon powder 11. The inlet pipeline of the inlet pump 3 is connected to the external water inlet, and the outlet pipeline is connected to the inlet pool 1 through a pipeline. The inlet pipeline of the water production pump 4 is connected to the ultrafiltration membrane box 5 through a pipeline, and the outlet pipeline is connected to the external water outlet;

[0045] The water inlet pool 1 is connected to the solid-liquid separation pool 2, the ultrafiltration membrane box 5 is immersed in the solid-liquid separation pool 2, the metal iron rod 10 is evenly inserted in the ultrafiltration membrane box 5 from top to bottom, the activated carbon powder 11 is evenly distributed in the solid-liquid separation pool 2, and the metal iron rod 10 and the activated carbon powder 11 form an iron-carbon micro-electrolysis system to degrade organic pollutants in the wastewater;

[0046] The ultrafiltration membrane in the ultrafiltration membrane box 5 intercepts the activated carbon powder 11 in the wastewater, realizes solid-liquid separation, and avoids the loss of the activated carbon powder 11. The filtrate is discharged by the water production pump 4.

[0047] A partition is provided between the water inlet tank 1 and the solid-liquid separation tank 2. The first partition near the water inlet tank 1 is fixed to the top of the water inlet tank 1, and the second partition near the solid-liquid separation tank 2 is fixed to the bottom of the solid-liquid separation tank 2. The bottom of the first partition is lower than the top of the second partition.

[0048] Wastewater overflows from the bottom of the inlet tank 1 and enters the solid-liquid separation tank 2;

[0049] The microporous aerator 7 is arranged in the solid-liquid separation tank 2 and below the ultrafiltration membrane box 5. In this embodiment, the microporous aerator 7 is arranged at the bottom of the solid-liquid separation tank 2, and the microporous aerator 7 and the Roots blower 6 are connected by a pipeline;

[0050] Air is introduced into the solid-liquid separation tank 2 by the Roots blower 6, and forms microbubbles after passing through the microporous aerator 7, and the activated carbon powder 11 is evenly dispersed in the solid-liquid separation tank 2;

[0051] The inlet pipeline of the backwash water tank 8 is connected to the outlet pipeline of the water production pump 4 through a pipeline, the outlet pipeline is connected to the inlet pipeline of the backwash water pump 9 through a pipeline, and the outlet pipeline of the backwash water pump 9 is connected to the ultrafiltration membrane box 5 through a pipeline;

[0052] The produced water in the backwash water tank 8 enters the ultrafiltration membrane box 5 through the backwash water pump 9 to achieve backwashing of the ultrafiltration membrane.

[0053] The pH value of the wastewater needs to be adjusted to 3-5.

[0054] The hydraulic retention time of the solid-liquid separation tank 2 is selected to be 0.5-2h.

[0055] The mass ratio of activated carbon powder 11 to wastewater in the solid-liquid separation tank 2 is controlled at (2-5):100.

[0056] The area ratio of the metal iron rod 10 to the ultrafiltration membrane is controlled at (2.5-4):10.

[0057] The ultrafiltration membrane is a hollow fiber membrane.

[0058] The pore size of the ultrafiltration membrane is selected to be 80-120 nm.

[0059] The operation mode of the ultrafiltration membrane can be selected as constant flow or intermittent.

[0060] The intermittent operation mode of the ultrafiltration membrane is selected as running 7-9 minutes / resting 3-5 minutes.

[0061] The unit water flow rate of the ultrafiltration membrane corresponds to a membrane area of ​​100-200m 2 .

[0062] The backwash flux of the ultrafiltration membrane is selected to be 50-60L / m 2 ·h.

[0063] The backwashing mode of the ultrafiltration membrane is selected as running 20-40min / backwashing 1-3min.

[0064] The coking wastewater (chemical oxygen demand (COD) of 4420 mg / L) from a coal coking plant in Taiyuan, Shanxi Province was taken as the treatment object, and the coking wastewater was degraded and treated by using this embodiment.

[0065] Embodiment 1:

[0066] The specific parameters of this embodiment are as follows: the pH value of the wastewater needs to be adjusted to 5, the hydraulic retention time is set to 0.5h, the mass ratio of activated carbon powder 11 to wastewater is controlled at 5:100, the area ratio of the metal iron rod 10 to the ultrafiltration membrane is controlled at 4:10, and the pore size is 100nm and the membrane area is 150m 2 Hollow fiber membrane, 1m 3 / h constant flow intermittent operation (run 9min / rest 1min), backwash flux selected 50L / m 2 ·h (operation 30min / backwash 1min).

[0067] Final result: COD value of coking wastewater was degraded from 4420mg / L to 2520mg / L, with a degradation rate of 43%.

[0068] Embodiment 2:

[0069] The specific parameters of this embodiment are as follows: the pH value of the wastewater needs to be adjusted to 3, the hydraulic retention time is set to 1.5h, the mass ratio of activated carbon powder 11 to wastewater is controlled at 4:100, the area ratio of the metal iron rod 10 to the ultrafiltration membrane is controlled at 3:10, and the pore size is 100nm and the membrane area is 150m 2 Hollow fiber membrane, 1m 3 / h constant flow intermittent operation (run 9min / rest 1min), backwash flux selected 60L / m 2 ·h (operation 30min / backwash 1min).

[0070] Final result: The COD value of coking wastewater was degraded from 4420 mg / L to 1900 mg / L, and the degradation rate could reach 57%.

[0071] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. A micro-electrolysis device with ultrafiltration function, characterized in that: The device comprises a water inlet pool (1), a solid-liquid separation pool (2), a water inlet pump (3), a water production pump (4), an ultrafiltration membrane box (5), a metal iron rod (10) and activated carbon powder (11), wherein the inlet pipeline of the water inlet pump (3) is connected to external water inlet, and the outlet pipeline is connected to the water inlet pool (1) through a pipeline, the inlet pipeline of the water production pump (4) is connected to the ultrafiltration membrane box (5) through a pipeline, and the outlet pipeline is connected to external water outlet; The water inlet pool (1) is connected to the solid-liquid separation pool (2), the ultrafiltration membrane box (5) is immersed in the solid-liquid separation pool (2), the metal iron rod (10) is inserted in the ultrafiltration membrane box (5), the activated carbon powder (11) is distributed in the solid-liquid separation pool (2), and the metal iron rod (10) and the activated carbon powder (11) form an iron-carbon micro-electrolysis system.

2. A micro-electrolysis device with ultrafiltration function according to claim 1, characterized in that: The ultrafiltration membrane in the ultrafiltration membrane box (5) intercepts the activated carbon powder (11) in the wastewater, and the filtrate is discharged by the water production pump (4).

3. A micro-electrolysis device with ultrafiltration function according to claim 2, characterized in that: The ultrafiltration membrane adopts a hollow fiber membrane.

4. A micro-electrolysis device with ultrafiltration function according to claim 1, characterized in that: A partition is provided between the water inlet tank (1) and the solid-liquid separation tank (2), wherein a first partition on the side close to the water inlet tank (1) is fixed to the top of the water inlet tank (1), and a second partition on the side close to the solid-liquid separation tank (2) is fixed to the bottom of the solid-liquid separation tank (2), and the bottom of the first partition is lower than the top of the second partition.

5. A micro-electrolysis device with ultrafiltration function according to claim 4, characterized in that: Wastewater overflows from the bottom of the water inlet tank (1) and enters the solid-liquid separation tank (2).

6. The micro-electrolysis device with ultrafiltration function according to claim 1, characterized in that: The device also includes a Roots blower (6) and a microporous aerator (7).

7. A micro-electrolysis device with ultrafiltration function according to claim 6, characterized in that: The microporous aerator (7) is arranged in the solid-liquid separation tank (2) and below the ultrafiltration membrane box (5), and the microporous aerator (7) and the Roots blower (6) are connected via a pipeline.

8. The micro-electrolysis device with ultrafiltration function according to claim 7, characterized in that: Air is introduced into the solid-liquid separation tank (2) by a Roots blower (6), and forms microbubbles after passing through a microporous aerator (7), thereby dispersing the activated carbon powder (11) in the solid-liquid separation tank (2).

9. The micro-electrolysis device with ultrafiltration function according to claim 1, characterized in that: The device also includes a backwash water tank (8) and a backwash water pump (9).

10. A micro-electrolysis device with ultrafiltration function according to claim 9, characterized in that: The inlet pipeline of the backwash water tank (8) and the outlet pipeline of the water production pump (4) are connected via a pipeline, the outlet pipeline and the inlet pipeline of the backwash water pump (9) are connected via a pipeline, and the outlet pipeline of the backwash water pump (9) and the ultrafiltration membrane box (5) are connected via a pipeline.

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