CN210480952U - High turbidity construction sewage treatment plant - Google Patents
High turbidity construction sewage treatment plant Download PDFInfo
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- CN210480952U CN210480952U CN201921410860.7U CN201921410860U CN210480952U CN 210480952 U CN210480952 U CN 210480952U CN 201921410860 U CN201921410860 U CN 201921410860U CN 210480952 U CN210480952 U CN 210480952U
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Abstract
A high-turbidity construction sewage treatment device comprises a coagulation device with a liquid inlet, a cyclone purifier and a sewage treatment system with a liquid outlet, wherein the outlet of the coagulation device is communicated with the feed inlet of the cyclone purifier, an overflow port at the top of the cyclone purifier is communicated with the inlet of a reaction tank, and the bottom of the cyclone purifier is provided with an underflow outlet. Aiming at sudden high-turbidity construction sewage, the removal rate of suspended matters and turbidity in tunnel sewage can reach more than 98%, and the treatment effect of COD and ammonia nitrogen can reach more than 90%.
Description
Technical Field
The utility model relates to a sewage purification device especially relates to a high turbidity construction sewage treatment plant.
Background
China is one of the countries with the most railway tunnels and the longest total extension in the world. At present, the total length of highway tunnels and railway tunnels in China is about 2 kilometers, and the total length of various underwater tunnels exceeds 1 kilometer.
Numerous tunnel projects are located in mountainous area hilly areas, some tunnel projects even are drinking water source areas or drinking water source conservation areas, and mostly belong to heavily-stricken areas with water and soil loss in China, the ecological environment is very fragile, a large amount of sewage is generated in the tunnel project construction process, if the sewage cannot be properly treated and is discharged, the pollution to the mountainous area environment, particularly the water environment, is certainly caused, therefore, the problem of the sewage in the tunnel construction must be highly emphasized, and the relationship between the tunnel construction and the original ecological environment resource is coordinated.
The sewage sources in the construction process mainly comprise water burst generated when a tunnel passes through a bad geological unit, sewage generated by construction machinery, sewage generated after blasting in drilling and blasting construction and used for dust fall, sewage generated by concrete spraying and grouting, bedrock fracture water and the like. According to past construction experience, the flow of sewage discharged from a tunnel is greatly changed from several cubes per hour to hundreds of cubes per hour, and the change is mainly caused by various factors such as unfavorable geology and tunnel construction progress.
In the tunnel construction process, sudden disasters such as collapse, faults, water burst and the like are easy to occur under the action of penetrating through a fold development section, passing through a fault fracture zone and blasting vibration force.
"high turbidity water" refers to a source of river water or river water with a high sand content or turbidity. The design criteria of the high-turbidity water supply water are as follows: high turbidity water refers to a sandy water body with high turbidity and clear crowded and subsided interface, and the sand content is 10 kg/m-100 kg/m for carrying out the thin-wall high-quality.
The main pollution characteristic of the sudden disaster is high turbidity pollution, and SS of produced sewage is more than or equal to 20000 mg/L. The most effective method for removing turbidity is chemical coagulation sedimentation method, but the conventional coagulation sedimentation method is not satisfactory in the face of high-turbidity water pollution caused by sudden disasters. Sudden water pollution occurs, the existing process is difficult to meet the treatment requirements, the temporary treatment efficiency is slow, the control is not easy, the system of the existing treatment process is possibly crashed, the water environment is also possibly seriously damaged, and the life health of surrounding residents is threatened.
The high-turbidity silt water is used as a suspension to be separated and treated, and is characterized by high silt content, low viscosity and suspension characteristics changing along with silt content and silt particle distribution. The sand-water separation requires high production capacity of equipment and low investment cost, and the equipment structure or operation parameters can be properly changed to meet the index requirement of the sand-water separation along with the change of the characteristics of the imported suspension liquid.
However, the equipment generally applied to solid-liquid separation at present not only has low operation efficiency, but also has poor material adaptability to the feeding port of the equipment. Once the plant is built, only the same material can be separated.
In order to realize the effective separation of the high muddy silt water, the strange phenomenon that the material adapts to equipment must be broken through, and the application of the hydrocyclone to carry out the separation of the high muddy silt water is an effective solid-liquid separation treatment technology which is developed rapidly. Firstly, the hydrocyclone has no internal rotating part, so that the energy is saved, and the hydrocyclone is simple and convenient to use; and secondly, the solid-liquid separation effect of the hydrocyclone is changed along with the structure of the hydrocyclone, the property of materials at a feeding hole and various operation parameters, so that the requirements of separating silt and high muddy water with different silt contents and particle distribution can be met.
An integrated device for treating high-turbidity construction sewage is a movable integrated water purification device which can quickly and conveniently treat sudden pollution of the construction sewage.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the sewage treatment device can effectively realize solid-liquid separation and has high adaptability to different materials.
The utility model adopts the technical proposal that: a high-turbidity construction sewage treatment device comprises a coagulation device with a liquid inlet, a cyclone purifier and a sewage treatment system with a liquid outlet, wherein the outlet of the coagulation device is communicated with the feed inlet of the cyclone purifier, an overflow port at the top of the cyclone purifier is communicated with the inlet of a reaction tank, and the bottom of the cyclone purifier is provided with an underflow outlet.
By adding the cyclone purifier in the sewage treatment device, sewage with different sediment contents can be treated, and solid-liquid separation is realized.
Preferably, the center of the upper part of the cyclone purifier is provided with a central overflow cylinder, the top surface of the central overflow cylinder is in a grid shape, and the aperture of the grid is 0.2mm-1 mm; the underflow outlet of the cyclone purifier is communicated with the sand setting tank.
Preferably, pressure gauges are arranged at the feed inlet and the overflow port of the cyclone purifier; the cyclone purifier is provided with an adjusting valve.
Preferably, the sewage treatment system including the coagulation tank, flocculation basin and the sedimentation tank that communicate in proper order, the top of whirl clarifier and the bottom intercommunication in coagulation tank, the top of coagulation tank and the bottom intercommunication in flocculation basin, the top of flocculation basin and the middle part intercommunication in sedimentation tank.
Preferably, a first stirring mechanism is arranged in the coagulation tank, a water distributor is arranged at the bottom of the coagulation tank, and the coagulation tank is communicated with the bottom of the flocculation tank through an overflow channel.
Preferably, be equipped with open-top's draft tube and stretch into the second rabbling mechanism in the draft tube in the flocculation basin, the bottom intercommunication of coagulation basin through water conservancy diversion canal and draft tube, the flocculation basin is through baffling the middle part intercommunication of passageway and sedimentation tank.
Preferably, the draft tube sequentially comprises a water inlet chamber, a water passing chamber and a water outlet chamber from bottom to top, the side wall of the water inlet chamber and the bottom surface of the draft tube form a gap of 30-50 degrees, the side wall of the water passing chamber and the bottom surface of the draft tube form a gap of 50-75 degrees, and the side wall of the water outlet chamber and the bottom surface of the draft tube form a gap of 90 degrees.
Preferably, be equipped with overflow weir, swash plate, mud scraper from top to bottom in the sedimentation tank in proper order, overflow weir and liquid outlet intercommunication, the bottom of sedimentation tank is equipped with first mud discharging hole and second mud discharging hole by supreme down in proper order, first mud discharging hole and water conservancy diversion canal intercommunication.
Preferably, the front end and the rear end of the coagulation device, the top of the coagulation tank and the top of the flocculation tank are provided with medicine adding ports.
The utility model has the advantages that:
1. aiming at sudden high-turbidity construction sewage, the SS of inlet water reaches 15000-25000mg/L, the treated outlet water can reach the first-level standard of Integrated wastewater discharge Standard (GB 8978-1996), the removal rate of suspended matters and turbidity in tunnel sewage can reach more than 98%, and the treatment effect of COD and ammonia nitrogen can reach more than 90%.
2. The equipment is simple and convenient to transport, simple and convenient to operate, large in sewage treatment capacity, low in use cost, strong in controllability and compact in structure, the cost is saved by 30-45% compared with the traditional process, and the floor area of the equipment is only 20% -30% of that of the traditional process.
3. The device application scope is wide, can require to remove at any time and equip according to sudden tunnel disaster treatment, uses at the circulation between each construction place, solves because the relative short idle problem of equipment that leads to of duration of sudden disaster, can greatly facilitate for the construction unit, has solved the worries after of construction unit to sewage treatment.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in figure 1, the high-turbidity construction sewage treatment device comprises a coagulation device 1, a cyclone purifier 2, a coagulation tank 4, a flocculation tank 5 and a sedimentation tank 6, wherein a liquid inlet hole 28 is formed in the bottom of the coagulation device 1, the upper part of the sedimentation tank 6 is communicated with a liquid outlet, and clear water is discharged into a collection tank 7.
The cyclone purifier 2 is provided with a central overflow cylinder 21 which is positioned at the central position of the upper part of the cyclone purifier 2 and is beneficial to separating and discharging clarified water and silt; the upper part of the cyclone purifier 2 is provided with a feed inlet 29, the top end is provided with an overflow port, and the bottom of the overflow port is provided with a sand setting tank 3, so that the concentrated silt water is conveniently discharged and the overflow water yield is improved.
The cyclone purifier 2 can adjust and control the inlet flow, the overflow flow and the bottom outlet flow through a valve to achieve different inlet pressure and overflow ratio when the cyclone purifier 2 operates. Pressure gauges are arranged at the overflow port and the feed port 29 of the cyclone purifier 2 to measure the pressure change at any time.
Be equipped with open-top's draft tube 17 in the flocculation basin 5 and stretch into the second rabbling mechanism 9 in the draft tube 17, be equipped with baffling board 15 in the flocculation basin 5, and form baffling passageway between the coagulation basin 4, baffling passageway and the middle part intercommunication of sedimentation tank 6.
The draft tube 17 comprises a water inlet chamber 20, a water passing chamber 19 and a water outlet chamber 18 from bottom to top, the angles between the draft tube 17 and the bottom surface are respectively 30-50 degrees, 50-75 degrees and 90 degrees, and the impact force is reduced while the flocculation speed is increased by setting at different angles.
A water distributor 12 and a first stirring mechanism 8 are arranged in the coagulation tank 4, and the water distributor 12 is positioned in the middle of the bottom of the coagulation tank 4; an overflow 13 is also arranged in the coagulation tank, the top end of the overflow 13 is communicated with the coagulation tank 4, and the bottom end of the overflow 13 is communicated with the bottom of the guide cylinder 17 through a guide channel 14.
The water distributor is designed to uniformly distribute the wastewater and improve the self-disturbance effect of the wastewater; on the other hand, the condition that the restarting medium is difficult to disperse uniformly and fails due to the fact that the weight of the medium is heavy at the bottom of the pool after the device is stopped can be prevented.
The top of sedimentation tank 6 is equipped with overflow weir 11, and the overflow weir below is equipped with swash plate 10, and the bottom of sedimentation tank 6 is equipped with first mud discharging hole 32 and the second mud discharging hole 33 that distributes from lower supreme in proper order, is equipped with mud scraper 16 between mud discharging hole and the swash plate.
The angle of the inclined plate is 40-60 degrees, so that the mud-water separation efficiency can be improved, and the occupied area of equipment is reduced; the first sludge discharge hole 32 is communicated with a fourth pump 25, a discharge hole of the fourth pump 25 is communicated with the diversion canal 14, and a second sludge discharge hole 33 is connected with the fifth pump 26; the bottom of the grit chamber 3 is connected with a 6 th pump 27, and the sludge in the grit chamber 3 and the sludge in the sedimentation tank 6 are finally treated by a sludge pipeline 34.
The front end and the rear end of the coagulation device 1 and the top of the coagulation tank 4 and the flocculation tank 5 are provided with medicine adding openings.
The following will take the treatment of tunnel wastewater as an example to further explain the wastewater treatment process of the present invention.
The tunnel sewage enters from a liquid inlet 28 at the bottom of the coagulation device 1 through a first pump 22, a medicament 1 is added to the front end of the coagulation device 1, the medicament 1 is a coagulant, the coagulation device 1 is fully mixed and reacted, the tunnel sewage is pumped into a cyclone purifier 2 from a water outlet at the upper part of the coagulation device 1 through a second pump 23, the medicament 2 is added between the coagulation device 1 and the cyclone purifier 2, and the medicament 2 is a flocculant.
Sewage is sent into a cyclone cavity of the cyclone purifier from a tangential inlet of the upper cylindrical part of the cyclone purifier 2, a centrifugal force field is generated by high-speed rotation in the cavity, phases or particles with large density in ore pulp are centrifugally settled under the action of centrifugal force and migrate to the periphery, so that the phases or particles are downwards rotated along the wall surface and finally discharged as bottom flow, enter a sand setting tank 3 and are discharged through a sixth pump 27; the fine particles have a low centrifugal settling velocity, rise in an inner spiral flow in the opposite direction, pass through the central overflow cylinder 21, are discharged from the upper end flow pipe, and the solid-liquid separation is completed.
Effluent of the cyclone purifier 2 passes through a third pump 24, enters the coagulation tank 4 from the bottom of the coagulation tank 4 through a water distributor 12, a reagent 3 is added according to the wastewater treatment requirement, the reagent 3 is a coagulant, and a first stirrer 8 is started to perform sufficient reaction in the coagulation tank.
After the wastewater stays in the coagulation tank 4 for 2-4 minutes, the wastewater enters the guide cylinder 17 from the bottom of the flocculation tank 5 through the overflow channel 13 and the guide channel 14, firstly passes through the water inlet chamber 20, the angle between the water inlet chamber and the baffle is 30-50, then the water passing chamber 19, the angle between the water passing chamber and the baffle is 50-75 degrees, and finally reaches the water outlet chamber 18, and through the arrangement of different angles, the flocculation speed is improved, meanwhile, the impact force is reduced, and the alum floc is more compact; throw addition medicament 4 in flocculation basin 5, medicament 4 is polymeric flocculant, and under the stirring of second mixer 9, the flocculating agent with get into draft tube 17 waste water intensive mixing, reaction, carry out quick flocculation stirring reaction after, overflow to flocculation basin 5 outside region from draft tube 17 top, outside region flocculation speed is comparatively slow under no agitator motor's effect, the continuous increase and the closely knit of guarantee flocculating body.
The waste water forming alum floc enters the baffling channel from the upper part of the baffle plate 15 and enters the middle part of the sedimentation tank 6,
waste water is subjected to inclined plate precipitation through an inclined plate 10, and upper clear water is discharged to a collecting tank through an overflow weir 11; the settled sludge is scraped to the bottom of the sedimentation tank 6 by the mud scraper 16 to realize sludge concentration, and the concentrated part of residual sludge flows back through the first pump 25 via the first sludge discharge hole 32 and flows back to the flocculation tank 4 via the sludge return hole 31 arranged at the bottom of the diversion channel 14; the remaining sludge passes through the second sludge discharge hole 33 and is discharged by the second pump 26.
Claims (9)
1. The high-turbidity construction sewage treatment device is characterized by comprising a coagulation device (1) with a liquid inlet, a cyclone purifier (2) and a sewage treatment system with a liquid outlet, wherein the outlet of the coagulation device (1) is communicated with the feed inlet (29) of the cyclone purifier (2), an overflow port at the top of the cyclone purifier is communicated with the inlet of the sewage treatment system, and the bottom of the cyclone purifier (2) is provided with an underflow outlet.
2. The high turbidity construction sewage treatment plant according to claim 1, wherein a central overflow cylinder (21) is provided at the central position of the upper part of the cyclone purifier (2), the top surface of the central overflow cylinder is in a grid shape, and the aperture of the grid is 0.2mm-1 mm; the underflow outlet of the cyclone purifier (2) is communicated with the sand setting tank (3).
3. The high turbidity construction sewage treatment plant according to claim 1, wherein pressure gauges are installed at the positions of the feed inlet (29) and the overflow port of the cyclone purifier; the cyclone purifier is provided with an adjusting valve.
4. A high turbidity construction sewage treatment device according to any of claims 1 to 3, wherein said sewage treatment system comprises a coagulation tank (4), a flocculation tank (5) and a sedimentation tank (6) which are connected in sequence, the top of said cyclone purifier (2) is connected with the bottom of the coagulation tank (4), the top of the coagulation tank (4) is connected with the bottom of the flocculation tank (5), and the top of the flocculation tank (5) is connected with the middle of the sedimentation tank (6).
5. A high turbidity construction sewage treatment plant according to claim 4, wherein a first stirring mechanism (8) is provided in the coagulation tank (4), a water distributor (12) is provided at the bottom of the coagulation tank, and the coagulation tank is communicated with the bottom of the flocculation tank through an overflow (13).
6. The high-turbidity construction sewage treatment device according to claim 4, wherein a guide cylinder (17) with an open top and a second stirring mechanism (9) extending into the guide cylinder (17) are arranged in the flocculation tank (5), the coagulation tank (4) is communicated with the bottom of the guide cylinder (17) through a guide channel (14), and the flocculation tank (5) is communicated with the middle part of the sedimentation tank (6) through a baffling channel.
7. The high-turbidity construction sewage treatment device according to claim 6, wherein the guide cylinder (17) comprises a water inlet chamber (20), a water passing chamber (19) and a water outlet chamber (18) from bottom to top in sequence, the distance between the side wall of the water inlet chamber (20) and the bottom surface of the guide cylinder is 30-50 degrees, the distance between the side wall of the water passing chamber (19) and the bottom surface of the guide cylinder is 50-75 degrees, and the distance between the side wall of the water outlet chamber (18) and the bottom surface of the guide cylinder is 90 degrees.
8. The high turbidity construction sewage treatment device according to claim 6, wherein an overflow weir (11), an inclined plate (10) and a mud scraper (16) are sequentially arranged in the sedimentation tank (6) from top to bottom, the overflow weir (11) is communicated with the liquid outlet, a first mud discharge hole (32) and a second mud discharge hole (33) are sequentially arranged at the bottom of the sedimentation tank (6) from bottom to top, and the first mud discharge hole (32) is communicated with the diversion channel (14).
9. A high turbidity construction wastewater treatment apparatus according to any of claims 5 to 8, wherein the front and rear ends of the coagulation vessel (1), the top of the coagulation tank (4) and the top of the flocculation tank (5) are provided with chemical feeding ports.
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| CN201921410860.7U CN210480952U (en) | 2019-08-28 | 2019-08-28 | High turbidity construction sewage treatment plant |
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| CN201921410860.7U CN210480952U (en) | 2019-08-28 | 2019-08-28 | High turbidity construction sewage treatment plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928121A (en) * | 2020-07-20 | 2020-11-13 | 中铁五局集团第一工程有限责任公司 | Working method of sewage treatment fluid control equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928121A (en) * | 2020-07-20 | 2020-11-13 | 中铁五局集团第一工程有限责任公司 | Working method of sewage treatment fluid control equipment |
| CN111928121B (en) * | 2020-07-20 | 2021-10-01 | 中铁五局集团第一工程有限责任公司 | Working method of sewage treatment fluid control equipment |
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