Secondary micro-flocculation integrated water purification device

Abstract

The utility model relates to the technical field of water treatment, in particular to a secondary micro-flocculation integrated water purification device which comprises a first flocculation reaction tank, a plurality of groups of first folded plates are arranged on the inner wall of the first flocculation reaction tank, a first water inlet pipe is arranged at the left end of the first flocculation reaction tank, a sedimentation tank is arranged at the right end of the first flocculation reaction tank, and a second flocculation reaction tank is arranged at the right end of the sedimentation tank. According to the utility model, a small amount of flocculating agent is added through the second flocculation dosing pump for mixing, the size of the micro flocculating constituent generated by the micro flocculation reaction is generally 10-50 microns, and after about 2-4 minutes, the micro flocculating constituent enters the filter tank through the second water inlet floral tube for filtering, and as the micro flocculating constituent is small in size and inertia, the contact opportunity of the micro flocculating constituent and the quartz sand of the filter layer is increased; the quartz sand filter tank is not easy to fall off, the water purification effect is improved, the quartz sand filter tank is subjected to deep filtration through secondary micro-flocculation, the coupling effect of micro-flocculation and deep filtration is brought into full play, the effect of the filter tank is improved, and the effluent turbidity index of a waterworks is met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to water treatment technical field, concretely relates to a secondary microflocculation integrated water purification device. BACKGROUND

[0002] With the rapid development of social economy, industrial wastewater and domestic sewage discharge is increasing, water pollution problem is increasingly serious, and water purification treatment technology becomes an important means to guarantee water resource safety.

[0003] In the prior art, flocculation technology is widely used in removing suspended particles and organic pollutants in water as an efficient water treatment method. However, the conventional flocculation equipment is difficult to meet the modern water demand when used, especially when the suspended solids concentration in raw water is high or there are a large number of fine particles, the conventional single filtration or sedimentation process cannot fully remove these pollutants, resulting in high turbidity of effluent, many residual particles and other conditions, which directly affects the water quality, and in addition, the filter material surface accumulates too much impurities during long-term operation, which reduces the water permeability, so that frequent backwashing is needed to restore the filtration capacity, which not only causes the system operation efficiency to decrease, but also causes the water production cost to increase significantly.

[0004] Therefore, a secondary microflocculation integrated water purification device is proposed, which improves the filtration effect, prolongs the filter backwashing cycle and reduces the water production cost. CONTENT OF THE UTILITY MODEL

[0005] In order to overcome the problems of poor water quality, frequent backwashing and significant increase of water production cost of the existing secondary microflocculation integrated water purification device during use.

[0006] The technical scheme of the utility model is as follows: a secondary microflocculation integrated water purification device, comprising a first flocculation reaction tank, a plurality of first folding plates are arranged on the inner wall of the first flocculation reaction tank, a first water inlet pipe is arranged at the left end of the first flocculation reaction tank, a sedimentation tank is arranged at the right end of the first flocculation reaction tank, a second flocculation reaction tank is arranged at the right end of the sedimentation tank, a plurality of second folding plates are arranged on the inner wall of the second flocculation reaction tank, a second flocculation dosing pump is arranged at the upper part of the second flocculation reaction tank, a filter tank is arranged at the right end of the second flocculation reaction tank, and a first water outlet pipe is arranged at the right end of the filter tank.

[0007] Preferably, when the water turbidity is high, the raw water is first supplied from one end of the first water inlet pipe to the inside of the first flocculation reaction tank, the flocculant can be accurately delivered to the mixer by the first flocculation dosing pump, and the flocculant and raw water can be fully mixed in a short time by the mixer. The water flow is divided into multiple narrow channels by the first baffle, so that the particulate matter can quickly settle along a shorter vertical path to the bottom of the tank during the settling process, thereby improving the settling efficiency. When the flocculated and settled water flows from the first water inlet flower pipe into the inside of the sedimentation tank, the inclined pipe is used to evenly distribute the water flow entering the inside of the sedimentation tank, avoiding water flow dynamic or short flow phenomenon, thereby improving the sedimentation effect. The settled water flows into the inside of the second flocculation reaction tank through the through hole, and a small amount of flocculant is added by the second flocculation dosing pump for mixing, which takes about 2-4 minutes. The size of the micro-floc generated by the micro-flocculation reaction is generally between 10-50um. Subsequently, the micro-floc enters the inside of the filter tank through the second water inlet flower pipe for filtration. Because the size of the micro-floc is small, the inertia is also small, which increases the contact opportunity of the quartz sand filter layer surface, forms full surface attachment with the quartz sand filter layer, and is not easy to fall off, thereby improving the pollution capacity in the filter material and being beneficial to the filter layer to retain more impurities. Moreover, the 1.2 meter height of the quartz sand filter layer can realize deep filtration, improve the filtration effect, and prolong the working cycle of the filter tank. Finally, the treated water is discharged from the first water outlet pipe. When the water turbidity is low (less than 20 NTU), the raw water without flocculant flows through the first flocculation reaction tank and the sedimentation tank, and a small amount of flocculant is added before entering the second flocculation reaction tank. After the secondary micro-flocculation tank mixing reaction, it directly enters the filter tank for filtration. At this time, the integrated water purification device becomes a micro-flocculation filtration device. When the water turbidity is high (more than 20 NTU), only flocculant is added in the raw water, which flows through the first flocculation reaction tank, the sedimentation tank and the second flocculation reaction tank, and then directly enters the filter tank for filtration. At this time, the integrated water purification device operates according to the conventional water treatment process, and the second flocculation dosing pump does not work. When it needs to be flushed, air is first injected through the second water inlet pipe. The air enters the quartz sand filter layer inside through the backwashing water inlet flower pipe and the water cap to stir, so that the quartz sand filter layer is fully loosened, and then water is added for flushing. Finally, the impurities are removed and discharged from the second water outlet pipe. The wastewater produced by backwashing in the filter tank can be directly reused after sedimentation treatment, which improves the cleaning effect and reduces water consumption, thereby solving the problems of poor water quality, frequent backwashing and significant increase in water production cost of the existing secondary micro-flocculation integrated water purification device.

[0008] As preferred, one end of the first water inlet pipe is fixed to the upper part of the outer wall of the first flocculation reaction tank and penetrates the outer wall of the first flocculation reaction tank, a first flocculation dosing pump and a mixer are fixed to the first water inlet pipe, in use, raw water is supplied from one end of the first water inlet pipe to the inside of the first flocculation reaction tank, the flocculant can be accurately delivered to the mixer through the first flocculation dosing pump, the flocculant and raw water are fully mixed in a short time by the mixer, and the treatment efficiency of the first flocculation reaction tank is improved.

[0009] As preferred, an inclined pipe is fixed to the middle part of the inner wall of the sedimentation tank, a first water inlet flower pipe is fixed to the lower part of the inner wall of the sedimentation tank, one end of the first water inlet flower pipe penetrates the inner wall of the sedimentation tank and the outer wall of the first flocculation reaction tank, a through hole penetrating the second flocculation reaction tank is formed in the upper part of the inner wall of the sedimentation tank, in use, when the water after flocculation and sedimentation flows into the inside of the sedimentation tank from the first water inlet flower pipe, the water flowing into the inside of the sedimentation tank is uniformly distributed by the inclined pipe, avoiding water flow dynamic or short flow phenomenon, thereby improving the sedimentation effect.

[0010] As preferred, a second water inlet flower pipe is fixed to the upper part of the inner wall of the filter tank, one end of the second water inlet flower pipe penetrates the inner wall of the filter tank and the outer wall of the second flocculation reaction tank, a supporting plate is fixed to the middle part of the inner wall of the filter tank, a plurality of water caps are arranged on the supporting plate, a quartz sand filter layer is arranged at the upper end of the supporting plate, a water outlet flower pipe is fixed to the lower part of the inner wall of the filter tank, one end of the water outlet flower pipe penetrates the inner wall of the filter tank and is fixed to one end of the first water outlet pipe, in use, when the treated water flows into the inside of the filter tank through the second water inlet flower pipe, the contact flocculation effect of the quartz sand filter layer can effectively remove suspended solids, particulate impurities and silt in water, significantly improve the clarity of water, improve the quality of the outlet water, and the filtered water can be uniformly collected through the water cap to ensure the stability of the outlet water quality.

[0011] As preferred, a backwash water inlet flower pipe is fixed to the lower part of the inner wall of the filter tank, one end of the backwash water inlet flower pipe penetrates the inner wall of the filter tank and is fixed to the second water inlet pipe, a second water outlet pipe is fixed to the outer wall of the filter tank, one end of the second water outlet pipe penetrates the outer wall of the filter tank, in use, air is first injected through the second water inlet pipe, the air enters the inside of the quartz sand filter layer through the backwash water inlet flower pipe and the water cap to stir, so that the quartz sand filter layer is fully loosened, then water is added for washing, and finally the impurities are taken away from the second water outlet pipe, the wastewater generated by backwashing in the filter tank can be directly reused after sedimentation treatment, improving the cleaning effect while reducing water consumption.

[0012] As preferred, the lower end of the first flocculation reaction tank, the sedimentation tank, the second flocculation reaction tank and the filter tank is provided with a sludge collecting hopper, the lower end of the sludge collecting hopper is fixedly connected with a sludge discharge pipe, the outer wall of the first flocculation reaction tank is provided with a PLC controller, when in use, the sludge collecting hopper and the sludge discharge pipe can collect and discharge a small amount of sludge deposited at the bottom of the first flocculation reaction tank, the sedimentation tank, the second flocculation reaction tank and the filter tank, the PLC controller can realize automatic control of the micro-flocculation integrated water purification device, improve the debugging and operation efficiency, and the water purification system does not need to stop running when discharging sludge.

[0013] As preferred, the height of the quartz sand filter layer is 1.2 m, and the thickness of the supporting plate is 0.2 m, when in use, the height of the quartz sand filter layer can realize deep filtration, improve the filtration effect, and prolong the filter tank working cycle.

[0014] The beneficial effects of the utility model are:

[0015] 1. The first flocculation dosing pump can accurately deliver the flocculant to the mixer, the mixer can fully mix the flocculant and raw water in a short time, the processing efficiency of the first flocculation reaction tank is improved, the second flocculation dosing pump adds a small amount of flocculant for mixing, which can be completed in about 2-4 minutes, the size of the micro-flocculation reaction generated micro-flocculation is generally between, then enters the filter tank through the second water inlet flower pipe for filtration, because the size of the micro-flocculation is small, the inertia is also small, the contact opportunity of the quartz sand filter layer surface is increased, the full surface adhesion with the quartz sand filter layer is formed, and the micro-flocculation is not easy to fall off, the pollution carrying capacity in the filter material is improved, and the problem of poor water purification quality of the existing secondary micro-flocculation integrated water purification device in use is solved.

[0016] 2. The second water inlet pipe first injects air, the air enters the quartz sand filter layer inside through the backwashing water inlet flower pipe and the water cap to stir, so that the quartz sand filter layer is fully loosened, then water is added for flushing, finally the impurities are taken away and discharged from the second water outlet pipe, the wastewater generated by backwashing in the filter tank can be directly reused after sedimentation treatment, the cleaning effect is improved while the water consumption is reduced, the height of the quartz sand filter layer can realize deep filtration, improve the filtration effect, and prolong the filter tank working cycle, and the problem that the existing secondary micro-flocculation integrated water purification device needs to be backwashed frequently and the water production cost increases significantly in use is solved.

[0017] 3. The sludge collecting hopper and the sludge discharge pipe can collect and discharge a small amount of sludge deposited in the first flocculation reaction tank, the sedimentation tank, the second flocculation reaction tank and the filter tank, the PLC controller can realize automatic control of the micro-flocculation integrated water purification device, improve the debugging and operation efficiency, and the water purification system does not need to stop running when discharging sludge. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1The utility model discloses a kind of secondary microflocculation integrated water purification device's stereoscopic structure schematic diagram of demonstration.

[0019] Fig. 2 The utility model discloses a kind of secondary microflocculation integrated water purification device's sectional stereoscopic structure schematic diagram of demonstration.

[0020] The mark in drawing is:1, first flocculation reaction tank;2, first folded plate;3, first water inlet pipe;4, first flocculation dosing pump;5, mixer;6, sedimentation tank;601, inclined pipe;602, first water inlet flower pipe;603, through hole;7, second flocculation reaction tank;8, second folded plate;9, second flocculation dosing pump;10, filter tank;11, second water inlet flower pipe;12, quartz sand filter layer;13, support plate;14, water cap;15, water outlet flower pipe;16, first water outlet pipe;17, backwash water inlet flower pipe;18, second water inlet pipe;19, second water outlet pipe;20, sludge collecting hopper;21, sludge discharge pipe;22, PLC controller. DETAILED DESCRIPTION

[0021] The utility model is further explained in connection with drawing and embodiment.

[0022] Please refer to Figs. 1-2 The utility model provides an embodiment: a kind of secondary microflocculation integrated water purification device, including first flocculation reaction tank 1;The inner wall of first flocculation reaction tank 1 is equipped with multiple first folded plate 2, the left end of first flocculation reaction tank 1 is equipped with first water inlet pipe 3, the right end of first flocculation reaction tank 1 is equipped with sedimentation tank 6, the right end of sedimentation tank 6 is equipped with second flocculation reaction tank 7, the inner wall of second flocculation reaction tank 7 is equipped with multiple second folded plate 8, the upper portion of second flocculation reaction tank 7 is equipped with second flocculation dosing pump 9, the right end of second flocculation reaction tank 7 is equipped with filter tank 10, the right end of filter tank 10 is equipped with first water outlet pipe 16.

[0023] Please refer to Fig. 2 In the embodiment, one end of first water inlet pipe 3 is fixedly connected on the outer wall upper portion of first flocculation reaction tank 1 and penetrates the outer wall of first flocculation reaction tank 1, and first flocculation dosing pump 4 and mixer 5 are fixedly connected on first water inlet pipe 3.

[0024] Please refer to Fig. 2 In the embodiment, inclined pipe 601 is fixedly connected in the inner wall middle portion of sedimentation tank 6, first water inlet flower pipe 602 is fixedly connected in the inner wall lower portion of sedimentation tank 6, one end of first water inlet flower pipe 602 penetrates the inner wall of sedimentation tank 6 and the outer wall of first flocculation reaction tank 1, and through hole 603 that penetrates second flocculation reaction tank 7 is set up in the inner wall upper portion of sedimentation tank 6.

[0025] Please refer to Fig. 2In the embodiment, the inner wall of the filter tank 10 is fixed with the second water inlet flower pipe 11 at the upper part, one end of the second water inlet flower pipe 11 penetrates the inner wall of the filter tank 10 and the outer wall of the second flocculation reaction tank 7, the inner wall of the filter tank 10 is fixed with the supporting plate 13 at the middle part, the supporting plate 13 is provided with a plurality of water caps 14, the upper end of the supporting plate 13 is provided with the quartz sand filter layer 12, the inner wall of the filter tank 10 is fixed with the water outlet flower pipe 15 at the lower part, one end of the water outlet flower pipe 15 penetrates the inner wall of the filter tank 10 and is fixed to one end of the first water outlet pipe 16.

[0026] Referring to Fig. 2 In the embodiment, the inner wall of the filter tank 10 is fixed with the backwashing water inlet flower pipe 17 at the lower part, one end of the backwashing water inlet flower pipe 17 penetrates the inner wall of the filter tank 10 and is fixed to the second water inlet pipe 18, the outer wall of the filter tank 10 is fixed with the second water outlet pipe 19, one end of the second water outlet pipe 19 penetrates the outer wall of the filter tank 10.

[0027] Referring to Fig. 1 In the embodiment, the lower end of the first flocculation reaction tank 1, the sedimentation tank 6, the second flocculation reaction tank 7 and the filter tank 10 is provided with the sludge collecting tank 20, the lower end of the sludge collecting tank 20 is fixed with the sludge discharge pipe 21, the outer wall of the first flocculation reaction tank 1 is provided with the PLC controller 22.

[0028] Referring to Fig. 2 In the embodiment, the height of the quartz sand filter layer 12 is 1.2 m, and the thickness of the supporting plate 13 is 0.2 m.

[0029] Through the above steps, when the turbidity of the water is high during use, the raw water is first supplied from one end of the first water inlet pipe 3 to the inside of the first flocculation reaction tank 1, the flocculant can be accurately delivered to the mixer 5 through the first flocculation dosing pump 4, the flocculant and the raw water are fully mixed in a short time by using the mixer 5, the water flow is divided into a plurality of narrow channels by the first baffle 2, so that the particulate matter can quickly settle to the bottom of the tank along a shorter vertical path during the settling process, thereby improving the sedimentation efficiency;

[0030] When the water after flocculation and sedimentation flows into the inside of the sedimentation tank 6 from the first water inlet flower pipe 602, the water flow entering the inside of the sedimentation tank 6 is uniformly distributed by using the inclined pipe 601, so as to avoid water flow dynamic or short flow phenomenon, thereby improving the sedimentation effect, the water after sedimentation flows into the inside of the second flocculation reaction tank 7 through the through hole 603, a small amount of flocculant is added by using the second flocculation dosing pump 9 for mixing, which is about 2-4 minutes, the size of the micro-floc generated by the micro-flocculation reaction is generally between 10-50 um, and then the micro-floc enters the inside of the filter tank 10 through the second water inlet flower pipe 11 for filtration;

[0031] Because the micro-floc is small in size and low in inertia, the contact opportunity with the surface of the quartz sand filter layer 12 is increased, full surface adhesion with the quartz sand filter layer 12 is formed, and the micro-floc is not easy to fall off, so that the impurity holding capacity in the filter material is improved, more impurities are retained by the filter layer, and in addition, deep filtration can be realized by using the height of the quartz sand filter layer 12, the filtration effect is improved, the working cycle of the filter tank is prolonged, and the treated water is discharged from the first water outlet pipe 16;

[0032] When the turbidity of the inlet water is very low and less than 20 NTU, the raw water without flocculant flows through the first flocculation reaction tank 1 and the sedimentation tank 6, a small amount of flocculant is added before entering the second flocculation reaction tank 7, and after the mixing reaction in the secondary micro-flocculation tank, the water directly enters the filter tank 10 for filtration, at this time, the integrated water purification device becomes a micro-flocculation filtration device; when the turbidity of the inlet water is higher than 20 NTU, only flocculant is added in the raw water, and the water flows through the first flocculation reaction tank 1, the sedimentation tank 6 and the second flocculation reaction tank 7, and then directly enters the filter tank 10 for filtration, at this time, the integrated water purification device operates according to the conventional water treatment process, and the second flocculation dosing pump 9 does not work.

[0033] When it is necessary to flush, air is first injected through the second inlet pipe 18, the air enters the quartz sand filter layer 12 through the backwashing inlet water flower pipe 17 and the water cap 14 to stir, so that the quartz sand filter layer 12 is fully loosened, then water is added for flushing, and finally the impurities are taken away, and the wastewater generated by backwashing in the filter tank can be directly reused after sedimentation treatment, so that the cleaning effect is improved and the water consumption is reduced, and the problems of poor water quality, frequent backwashing and significant increase in water production cost of the existing secondary micro-flocculation integrated water purification device are solved.

[0034] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the purpose of the utility model.

Claims

1. A secondary micro-flocculation integrated water purification device, comprising a first flocculation reaction tank (1); characterized in that: The inner wall of the first flocculation reaction tank (1) is provided with a plurality of first folded plates (2), the left end of the first flocculation reaction tank (1) is provided with a first water inlet pipe (3), the right end of the first flocculation reaction tank (1) is provided with a sedimentation tank (6), the right end of the sedimentation tank (6) is provided with a second flocculation reaction tank (7), the inner wall of the second flocculation reaction tank (7) is provided with a plurality of second folded plates (8), the upper portion of the second flocculation reaction tank (7) is provided with a second flocculation dosing pump (9), the right end of the second flocculation reaction tank (7) is provided with a filter tank (10), and the right end of the filter tank (10) is provided with a first water outlet pipe (16).

2. The secondary micro-flocculation integrated water purifying device according to claim 1, characterized in that: One end of the first water inlet pipe (3) is fixedly connected to the outer wall of the first flocculation reaction tank (1) and penetrates the outer wall of the first flocculation reaction tank (1), and the first water inlet pipe (3) is fixedly connected with a first flocculation dosing pump (4) and a mixer (5).

3. The secondary micro-flocculation integrated water purifying device according to claim 1, characterized in that: The inner wall of the sedimentation tank (6) is fixedly connected with an inclined pipe (601) at the middle portion, the inner wall of the sedimentation tank (6) is fixedly connected with a first water inlet flower pipe (602) at the lower portion, one end of the first water inlet flower pipe (602) penetrates the inner wall of the sedimentation tank (6) and the outer wall of the first flocculation reaction tank (1), and a through hole (603) penetrating the second flocculation reaction tank (7) is formed in the upper portion of the inner wall of the sedimentation tank (6).

4. The secondary micro-flocculation integrated water purifying device according to claim 1, characterized in that: The inner wall of the filter tank (10) is fixedly connected with a second water inlet flower pipe (11) at the upper portion, one end of the second water inlet flower pipe (11) penetrates the inner wall of the filter tank (10) and the outer wall of the second flocculation reaction tank (7), the inner wall of the filter tank (10) is fixedly connected with a supporting plate (13) at the middle portion, a plurality of water caps (14) are arranged on the supporting plate (13), the upper end of the supporting plate (13) is provided with a quartz sand filter layer (12), the inner wall of the filter tank (10) is fixedly connected with a water outlet flower pipe (15) at the lower portion, one end of the water outlet flower pipe (15) penetrates the inner wall of the filter tank (10) and is fixedly connected to one end of the first water outlet pipe (16).

5. The secondary micro-flocculation integrated water purifying device according to claim 1, characterized in that: The inner wall of the filter tank (10) is fixedly connected with a backwashing water inlet flower pipe (17) at the lower portion, one end of the backwashing water inlet flower pipe (17) penetrates the inner wall of the filter tank (10) and is fixedly connected with a second water inlet pipe (18), and the outer wall of the filter tank (10) is fixedly connected with a second water outlet pipe (19), one end of the second water outlet pipe (19) penetrates the outer wall of the filter tank (10).

6. The secondary micro-flocculation integrated water purifying device according to claim 1, characterized in that: The lower ends of the first flocculation reaction tank (1), the sedimentation tank (6), the second flocculation reaction tank (7) and the filter tank (10) are provided with a sludge collecting hopper (20), the lower end of the sludge collecting hopper (20) is fixedly connected with a sludge discharge pipe (21), and the outer wall of the first flocculation reaction tank (1) is provided with a PLC controller (22).

7. The secondary micro-flocculation integrated water purifying device according to claim 1, characterized in that: The height of the quartz sand filter layer (12) is 1.2 m, and the thickness of the supporting plate (13) is 0.2 m.

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