Medium recovery device for medium-added efficient sedimentation tank

Abstract

The utility model discloses a medium recovery device for a medium-added high-efficiency sedimentation tank, a muddy water collecting area, a stirring area and a sedimentation area are arranged in the recovery device, the muddy water collecting area is provided with a muddy water collecting component, the stirring area is provided with a stirring component, the sedimentation area is provided with a clear water collecting component, a sludge scraper and a sludge hopper, and the sludge hopper is provided with a water inlet and a water outlet. And a sludge return pipe and a sludge circulating pipe are arranged on the sludge hopper. According to the invention, the concentration of discharged sludge of the medium-adding sedimentation tank is effectively improved, and the volume of the discharged sludge is reduced, so that the sludge can directly enter the sludge dewatering unit without being treated by other units of a sewage plant, the mutual interference among process units is reduced, and meanwhile, along with the reduction of the sludge amount, the sewage treatment efficiency is improved. The water loss of the sedimentation tank body is reduced, and the operation economic benefit of the sedimentation tank unit is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field, concretely is a kind of medium recovery device of medium efficient sedimentation tank. BACKGROUND

[0002] The existing medium sedimentation tank adopts hydrocyclone to centrifugally separate medium and sludge, and after separation, the medium returns to sand adding area for reaction, and the sludge is directly discharged.

[0003] The existing medium sedimentation process only separates mud and sand by hydrocyclone, and during system operation, the discharged sludge accounts for 3%-6% of the influent water, and for some large-scale projects, the sludge discharge amount is large, and the water content is high, far exceeding the treatment capacity of the sludge treatment unit of the sewage plant, and the usual practice is to discharge the sludge to the secondary sedimentation tank of the sewage plant, and use the sludge discharge system of the secondary sedimentation tank to deposit the sludge.

[0004] However, these sludges are mainly chemical sludges, which will return to the biochemical treatment system again during the sludge backflow process in the secondary sedimentation tank, on the one hand, increasing the water amount and load of the secondary sedimentation tank and deteriorating the sedimentation effect, and on the other hand, the chemical sludge backflowing to the biochemical treatment system has certain influence on the microorganisms in the biochemical reaction tank, causing the biochemical treatment effect to decrease. SUMMARY

[0005] The utility model aims at providing a kind of medium recovery device of medium efficient sedimentation tank to solve the problems raised in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of medium recovery device of medium efficient sedimentation tank, including recovery device, mud-water collection area, stirring area and sedimentation area are provided in the recovery device, the mud-water collection area is provided with mud-water collection assembly, the stirring area is provided with stirring assembly, the sedimentation area is provided with clear water collection assembly, mud scraper and sludge hopper, the sludge hopper is provided with backflow sludge pipe and circulating sludge pipe, one end of the backflow sludge pipe is provided with circulating sludge pump, the output end of the circulating sludge pump is provided with backflow pipe, and one end of the backflow pipe is connected with the mud-water collection area, the end of the circulating sludge pipe is connected with residual sludge pump, the output end of the residual sludge pump is provided with residual sludge pipe, flowmeter is installed on the residual sludge pipe and the backflow pipe, mud level gauge is provided in the sedimentation area, sampling assembly is provided on the recovery device, and partition wall is provided between the stirring area and the sedimentation area.

[0007] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0008] Optionally, the sludge-water collecting assembly comprises a hydrocyclone, a feed pipe and an overflow pipe, the feed pipe and the overflow pipe are arranged on the hydrocyclone, one end of the overflow pipe extends into the sludge-water collecting area, and a flocculant feeding port is arranged on the sludge-water collecting area.

[0009] Optionally, the stirring assembly comprises a draft tube, a slow-speed stirrer and a communication pipe, the draft tube is arranged in the sedimentation tank, the slow-speed stirrer is arranged in the draft tube, and the communication pipe is arranged at the bottom of the draft tube and connected with the sludge-water collecting area.

[0010] Optionally, the clear water collecting assembly comprises a water collecting tank, a water outlet channel, an inclined pipe and a water outlet pipe, the water collecting tank and the water outlet channel are arranged above the sedimentation area, the inclined pipe is arranged in the sedimentation area, the water outlet pipe is arranged on the water outlet channel, and the inclined pipe is filled with an inclined pipe filler.

[0011] Optionally, the sampling assembly comprises a sampling bucket, a flocculant feeding port one, a baffle and a recovery pipeline, the sampling bucket is arranged on the recovery device, the flocculant feeding port one is arranged outside the sampling bucket, the baffle is arranged inside the sampling bucket, and the recovery pipeline is arranged at the bottom of the sampling bucket.

[0012] Further optionally, the inclined pipe is a corrugated inclined plate.

[0013] Advantages

[0014] In summary, the present application has at least one of the following advantages:

[0015] 1. The present application increases the stirring, sedimentation, reflux pump, residual sludge pump and other devices on the basis of the hydrocyclone separating sludge, effectively improves the concentration of the discharged sludge of the medium adding sedimentation tank, reduces the volume of the discharged sludge, makes the sludge directly enter the sludge dewatering unit without being treated by other units of the sewage plant, reduces the mutual interference between the process units, reduces the water loss of the sedimentation tank body with the reduction of the sludge amount, and improves the operation economic benefits of the sedimentation tank unit.

[0016] 2. The present application can enhance the flocculation effect by mixing the flocculant of the medium adding sedimentation tank with the medium in advance, and the effluent water quality of the medium adding sedimentation tank is more stable. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a left view of the present application;

[0018] Figure 2 is a right view of the present application;

[0019] Figure 3is a sectional view of the present application;

[0020] Figure 4 is a plan view of the present application;

[0021] Figure 5 is an enlarged view of the sampling bucket structure of the present application.

[0022] In the figure: 1, recovery device; 2, sludge collection area; 3, stirring area; 4, sedimentation area; 5, sludge collection assembly; 501, hydrocyclone; 502, feed pipe; 503, overflow pipe; 6, stirring assembly; 601, draft tube; 602, slow stirrer; 603, communication pipe; 7, clean water collection assembly; 701, water collecting tank; 702, water outlet channel; 703, inclined pipe; 704, water outlet pipe; 8, mud scraper; 9, sludge bucket; 10, return sludge pipe; 11, return pipe; 12, circulating sludge pump; 13, circulating sludge pipe; 14, residual sludge pump; 15, flow meter; 16, sludge level meter; 17, sampling assembly; 1701, sampling bucket; 1702, flocculant dosing port one; 1703, baffle; 1704, recovery pipeline; 18, partition wall; 19, residual sludge pipe; 20, flocculant dosing port two. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0024] Please refer to Figures 1-5 The present application designs a medium recovery device for a medium efficient sedimentation tank: a recovery device 1 is arranged, a sludge collection area 2, a stirring area 3 and a sedimentation area 4 are arranged in the recovery device 1, a sludge collection assembly 5 is arranged on the sludge collection area 2, a stirring assembly 6 is arranged on the stirring area 3, a clean water collection assembly 7, a mud scraper 8 and a sludge bucket 9 are arranged on the sedimentation area 4, a return sludge pipe 10 and a circulating sludge pipe 13 are arranged on the sludge bucket 9, a circulating sludge pump 12 is arranged on one end of the return sludge pipe 10, a return pipe 11 is arranged on the output end of the circulating sludge pump 12, one end of the return pipe 11 penetrates through and is connected with the sludge collection area 2, a residual sludge pump 14 is connected to the end of the circulating sludge pipe 13, a residual sludge pipe 19 is arranged on the output end of the residual sludge pump 14, flow meters 15 are arranged on the residual sludge pipe 19 and the return pipe 11, a sludge level meter 16 is arranged in the sedimentation area 4, a sampling assembly 17 is arranged on the recovery device 1, and a partition wall 18 is arranged between the stirring area 3 and the sedimentation area 4.

[0025] The mud-water collecting assembly 5 of the present application comprises a hydrocyclone 501, a feed pipe 502 and an overflow pipe 503, the feed pipe 502 and the overflow pipe 503 are arranged on the hydrocyclone 501, and one end of the overflow pipe 503 extends into the mud-water collecting area 2, and the mud-water collecting area 2 is provided with a flocculant dosing port two 20, the hydrocyclone 501 in the mud-water collecting assembly 5 separates the mixture containing the medium and the sludge, and the separated sludge enters the mud-water collecting area 2, and when the amount of sludge in the water is small, a proper amount of flocculant can be added through the flocculant dosing port two 20 to enhance the flocculation effect.

[0026] The clear water collecting assembly 7 of the present application comprises a water collecting tank 701, a water outlet channel 702, an inclined pipe 703 and a water outlet pipe 704, the water collecting tank 701 and the water outlet channel 702 are arranged above the sedimentation area 4, the inclined pipe 703 is arranged in the sedimentation area 4, the water outlet pipe 704 is arranged on the water outlet channel 702, and the inclined pipe 703 is provided with inclined pipe fillers, after the mud-water enters the sedimentation area 4, the inclined pipe 703 in the clear water collecting assembly 7 intercepts the un-settled flocculation, so that the clear water can be collected through the water collecting tank 701 to the water outlet channel 702, and then the clear water is discharged to the medium adding sedimentation tank through the water outlet pipe 704.

[0027] The sampling assembly 17 of the present application comprises a sampling hopper 1701, a flocculant dosing port one 1702, a baffle 1703 and a recovery pipeline 1704, the sampling hopper 1701 is arranged on the recovery device 1, the flocculant dosing port one 1702 is arranged outside the sampling hopper 1701, the baffle 1703 is arranged inside the sampling hopper 1701, and the recovery pipeline 1704 is arranged at the bottom of the sampling hopper 1701, after the mixture containing the medium and the sludge is separated by the hydrocyclone 501, the medium is discharged to the sampling hopper 1701 at the bottom of the hydrocyclone 501, a proper amount of flocculant is added through the flocculant dosing port one 1702 on the sampling hopper 1701, so that the medium and the flocculant can be premixed during the falling process, and after the mixing is completed, the mixture flows into the adding area of the medium adding sedimentation tank through the medium recovery pipeline 1704 below, and is recycled.

[0028] Preferably, the inclined pipe 703 is a corrugated inclined plate, which can help to increase the surface area of the sedimentation area 4, thereby improving the sedimentation efficiency of the suspended matter.

[0029] In actual use, the inclined pipe 703 can also be designed into other shapes of inclined plates according to needs, which will not be described here.

[0030] Preferably, when the external medium is magnetic powder, the hydrocyclone 501 can be replaced by a “magnetic separator + high shear machine”.

[0031] Preferably, the mixing function of the sampling bucket 1701 can be replaced by a pipeline mixer.

[0032] The operation principle of the application is as follows:

[0033] The mixture containing medium and sludge is transported into the hydrocyclone 501 through the feed pipe 502 by the medium precipitation tank circulating pump, the separated medium is discharged from the bottom of the hydrocyclone 501 into the sampling bucket 1701, the flocculating agent is added into the sampling bucket 1701 through the flocculating agent adding port 1702, so that the medium and the flocculating agent can be premixed during falling, the mixing is completed and flows into the medium adding area of the medium precipitation tank through the lower medium recovery pipeline 1704 for recycling, the separated sludge is discharged from the top overflow pipe 503 of the hydrocyclone 501 into the sludge and water collecting area 2, and then is transported into the stirring area 3 through the connecting pipe 603, the sludge and water are stirred by the slow speed stirrer 602, the floc gradually becomes large, the stirred sludge and water turn over the partition wall 18 into the sedimentation area 4, the clear water enters into the water collecting tank 701 through the separation of the inclined plate 703, and the sludge enters into the sludge bucket 9, the circulating sludge pump 13 returns part of the sludge to the flocculation area through the backflow pipe 11 to enhance the flocculation effect, then the remaining sludge pump 14 is controlled according to the height of the sludge level meter 16 to discharge the sludge to the sludge dewatering unit through the remaining sludge pipe 19.

[0034] When the device of the application is operated, the mixture containing medium and sludge is separated by the hydrocyclone 501, the separated medium and sludge are returned to the medium precipitation tank system for further reaction after the medium is premixed with the flocculating agent, so as to enhance the flocculation effect.

[0035] The separated sludge enters the newly added stirring area 3, the sludge in the sludge and water re-occurs flocculation reaction under the stirring of the slow speed stirrer 602 and the sludge backflow, forms more compact floc, and then enters the subsequent sedimentation area 4 for sedimentation, and the sludge is further concentrated and then discharged to the sludge dewatering unit by the remaining sludge pump 14 (without going to the secondary sedimentation tank), and the clear water after sedimentation returns to the medium precipitation tank.

[0036] On the one hand, the sludge concentration can be improved, the sludge amount can be reduced, and the sludge treatment is facilitated, and on the other hand, the clear water after sludge sedimentation returns to the medium precipitation tank, the water loss of the medium precipitation tank is reduced, and the economic benefit is improved.

[0037] Although the embodiments of the application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A medium recovery device for a medium-dosed settling tank, comprising a recovery device (1), characterized in that: The recovery device (1) is provided with a sludge-water collecting area (2), a stirring area (3) and a sedimentation area (4), the sludge-water collecting area (2) is provided with a sludge-water collecting assembly (5), the stirring area (3) is provided with a stirring assembly (6), the sedimentation area (4) is provided with a clear water collecting assembly (7), a mud scraper (8) and a sludge hopper (9), the sludge hopper (9) is provided with a backflow sludge pipe (10) and a circulating sludge pipe (13), one end of the backflow sludge pipe (10) is provided with a circulating sludge pump (12), the output end of the circulating sludge pump (12) is provided with a backflow pipe (11), one end of the backflow pipe (11) penetrates through and is connected with the sludge-water collecting area (2), the end of the circulating sludge pipe (13) is connected with a residual sludge pump (14), the output end of the residual sludge pump (14) is provided with a residual sludge pipe (19), the residual sludge pipe (19) and the backflow pipe (11) are both provided with a flow meter (15), the sedimentation area (4) is provided with a sludge level meter (16), the recovery device (1) is provided with a sampling assembly (17), and the stirring area (3) and the sedimentation area (4) are provided with a partition wall (18).

2. The medium recovery device for a high-efficiency medium settling tank according to claim 1, characterized in that: The sludge-water collecting assembly (5) comprises a hydrocyclone (501), a feed pipe (502) and an overflow pipe (503), the feed pipe (502) and the overflow pipe (503) are arranged on the hydrocyclone (501), one end of the overflow pipe (503) extends into the sludge-water collecting area (2), and the sludge-water collecting area (2) is provided with a flocculant feeding port two (20).

3. The medium recovery device for a high-efficiency medium settling tank according to claim 1, characterized in that: The stirring assembly (6) comprises a flow guide cylinder (601), a slow-speed stirrer (602) and a communication pipe (603), the flow guide cylinder (601) is arranged in the recovery device (1), the slow-speed stirrer (602) is arranged in the flow guide cylinder (601), and the communication pipe (603) is arranged at the bottom of the flow guide cylinder (601) and connected with the sludge-water collecting area (2).

4. The medium recovery device for a high-efficiency medium settling tank according to claim 1, characterized by: The clear water collecting assembly (7) comprises a water collecting tank (701), a water outlet channel (702), an inclined pipe (703) and a water outlet pipe (704), the water collecting tank (701) and the water outlet channel (702) are arranged above the sedimentation area (4), the inclined pipe (703) is arranged in the sedimentation area (4), and the water outlet pipe (704) is arranged on the water outlet channel (702).

5. The medium recovery device for a high-efficiency medium settling tank according to claim 1, characterized by: The sampling assembly (17) comprises a sampling hopper (1701), a flocculant feeding port one (1702), a baffle (1703) and a recovery pipeline (1704), the sampling hopper (1701) is arranged on the recovery device (1), the flocculant feeding port one (1702) is arranged outside the sampling hopper (1701), the baffle (1703) is arranged inside the sampling hopper (1701), and the recovery pipeline (1704) is arranged at the bottom of the sampling hopper (1701).

6. The medium recovery device for a high-efficiency medium settling tank according to claim 4, characterized by: The inclined pipe (703) is a corrugated inclined plate.

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