CN212559868U - High-efficient anaerobism of waste paper papermaking waste water goes out water degasification decalcification system - Google Patents
High-efficient anaerobism of waste paper papermaking waste water goes out water degasification decalcification system Download PDFInfo
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- CN212559868U CN212559868U CN202021080861.2U CN202021080861U CN212559868U CN 212559868 U CN212559868 U CN 212559868U CN 202021080861 U CN202021080861 U CN 202021080861U CN 212559868 U CN212559868 U CN 212559868U
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Abstract
The utility model discloses a high-efficient anaerobism of waste paper papermaking waste water goes out water degasification decalcification system. Including venturi way blender, hydrocyclone, efflux aeration tank and the inclined plate sedimentation tank that connects in order between high-efficient anaerobic reactor and good oxygen pond, the high-efficient anaerobic reactor export is managed to say and is linked to venturi way blender water inlet, and venturi says that the blender delivery port communicates to the hydrocyclone water inlet through the pipeline, and the hydrocyclone delivery port is managed to say and communicates to the aeration tank water inlet, and the aeration tank delivery port communicates to the sedimentation tank water inlet through the pipeline, and the sedimentation tank delivery port communicates to good oxygen pond through the pipeline. The utility model discloses can effectively get rid of carbon dioxide and calcium ion of high-efficient anaerobism aquatic mesomorphic, it is good to produce water quality of water, and the reliability is high, and reforms transform the convenience, is applicable to the improvement mark transformation of waste paper papermaking waste water treatment process.
Description
Technical Field
The utility model relates to a papermaking reclaimed water processing system especially relates to a high-efficient anaerobism of waste paper papermaking waste water goes out water degasification decalcification system.
Background
With the rapid development of the social economy of China, the development of the waste paper papermaking industry is rapid, and the pollution treatment problem of waste paper papermaking wastewater is widely concerned by various social circles. As is known, waste paper papermaking wastewater belongs to high-concentration organic wastewater, has the characteristics of large discharge amount, high chemical oxygen demand, high calcium ion concentration and the like, and the current mainstream treatment process is 'efficient anaerobic treatment, aerobic treatment, coagulating sedimentation and membrane advanced treatment'. Engineering practice researches show that calcium ions in the waste paper papermaking wastewater can reach 2000mg/L, high-concentration calcium ions cause serious threats to normal operation of a biochemical treatment unit and a membrane deep treatment unit, and problems such as sludge calcification inactivation, membrane scaling, conveying equipment failure and the like are caused, so that the method has important significance in strengthening the research on the calcium removal technology of the waste paper papermaking wastewater.
At present, the technical routes for calcium removal of waste paper papermaking wastewater at home and abroad mainly comprise three types: chemical calcium removal, high-efficiency anaerobic calcium control and aerobic aeration calcium removal. The chemical calcium removal route is a traditional route, and mainly removes calcium ion precipitates by adding an alkaline medicament, so that the route has good calcium removal effect and high operation cost; the high-efficiency anaerobic calcium control route controls calcium ions in a bicarbonate form by mainly controlling wastewater treatment load, inlet water pH and the concentration of dissolved carbon dioxide in wastewater in a tower, thereby avoiding crystallization. At present, the route is the key point of domestic and foreign research and has a breakthrough; the aerobic aeration calcium removal route is mainly characterized in that the aeration and oxygenation process of an aerobic pool is utilized to assist in removing dissolved carbon dioxide in high-efficiency anaerobic effluent, the pH of the wastewater is increased, and thus Ca (HCO) is realized3)2To CaCO3Form-converted, crystallized CaCO3And is discharged together with the aerobic sludge. The route has better calcium removal performance, but the calcification problem of aerobic sludge is aggravated and severeThe aerobic biochemical treatment performance is seriously influenced. Therefore, the development of the process for enhancing the high-efficiency anaerobic effluent degassing and calcium removal of the waste paper papermaking wastewater is imperative to solve the problem of sludge calcification of the aerobic biochemical treatment unit and ensure the normal operation of a waste paper papermaking wastewater treatment system.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the background art, the utility model aims to provide a high-efficient anaerobism of waste paper papermaking waste water goes out water degasification decalcification system can get into carbon dioxide and the calcium ion of the resolvent state in the good oxygen biochemical unit of desorption waste water before high-efficient anaerobism goes out water, and it is good to produce water quality, has increased the activity of good oxygen activated sludge, and the reliability is high, and reforms transform the convenience.
The utility model adopts the technical proposal that:
the utility model comprises a high-efficiency anaerobic reactor and an aerobic tank, and also comprises a Venturi tube mixer, a hydraulic cyclone, a jet aeration tank and a sloping plate sedimentation tank which are connected between the high-efficiency anaerobic reactor and the aerobic tank and are connected in sequence, wherein one end of the Venturi tube mixer is provided with a Venturi tube mixer water inlet, the other end is provided with a Venturi tube mixer water outlet, and the top of the reducing zone of the Venturi tube mixer is provided with a Venturi tube mixer air inlet; the upper part of the hydrocyclone is provided with a hydrocyclone water inlet, the top part of the hydrocyclone is provided with a hydrocyclone air outlet, and the lower part of the hydrocyclone is provided with a hydrocyclone water outlet; the lower part of the jet aeration tank is provided with an aeration tank water inlet, the upper part of the jet aeration tank is provided with an aeration tank water outlet, and the bottom of the tank is provided with a jet aerator; one side of the upper part of the inclined plate sedimentation tank is provided with a sedimentation tank water inlet, the other side of the upper part of the inclined plate sedimentation tank is provided with a sedimentation tank water outlet, the bottom of the inclined plate sedimentation tank is provided with a sludge discharge port, and the middle of the inclined plate sedimentation tank is provided with an inclined plate; the high-efficiency anaerobic reactor export is said the pipeline and is communicated to venturi and says the blender water inlet, and venturi says that the blender delivery port communicates to the hydrocyclone water inlet through the pipeline, and the hydrocyclone delivery port communicates to the aeration tank water inlet through the pipeline, and the aeration tank delivery port communicates to the sedimentation tank water inlet through the pipeline, and the sedimentation tank delivery port communicates to good oxygen pond through the pipeline.
In the jet aeration tank, the gas-water ratio is 2500-3500, and the hydraulic retention time is 20-30 min.
The inclined plates in the inclined plate sedimentation tank are obliquely arranged at an angle of 45-60 degrees with the horizontal plane and are inclined downwards along the direction vertical to the direction from the water inlet of the sedimentation tank to the water outlet of the sedimentation tank, and the designed surface load is 3.0m3/(m2 .h)～4.0m3/(m2 .h) The hydraulic retention time is 15 min-20 min.
In the Venturi pipeline mixer, the water inlet pressure is 0.15 Mpa-0.30 Mpa, and the air flow is 40m3/h～100m3/h。
In the hydrocyclone, the flow dividing ratio of the exhaust port of the hydrocyclone is 0.40-0.50, and the taper angle of a large taper section is 16-20 degrees.
The lower part of the high-efficiency anaerobic reactor is provided with an anaerobic water inlet, the top of the high-efficiency anaerobic reactor is provided with an anaerobic exhaust port, the upper part of the high-efficiency anaerobic reactor is provided with an anaerobic water outlet, and the anaerobic water outlet is used as an outlet of the high-efficiency anaerobic reactor.
The utility model has the advantages that:
(1) the degassing and calcium removing effects are good. The utility model discloses institute's water treatment system sets up the two-stage degasification unit, utilizes venturi way blender as the mixed pressure boost unit of self-aeration, and hydrocyclone is as first order degasification unit, and the jet aeration pond is as second level degasification unit, and it is efficient to dissolve attitude carbon dioxide desorption in the waste water to utilize the swash plate to deposit and get rid of the CaCO that the crystallization appeared3Short settling time and good removing effect.
(2) The power consumption is low. The utility model discloses water treatment system make full use of the water conservancy pressure head of anaerobism play water, do not need extra power among the waste water transportation process, and the system's working costs is economized.
(3) The transformation is convenient. The utility model discloses a water treatment system can reform transform on the "aeration tank + sedimentation tank" technology basis of present mainstream, owing to make full use of has had engineering facility, therefore technology transformation is convenient.
From this it is comprehensive, the utility model discloses can effectively get rid of carbon dioxide and the calcium ion of the high-efficient anaerobism in the play water dissolved state, it is good to produce water quality of water, and the reliability is high, and reforms transform the convenience, is applicable to the improvement of waste paper papermaking waste water treatment technology and marks the transformation.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-high-efficiency anaerobic reactor, 2-anaerobic water inlet, 3-anaerobic exhaust port, 4-anaerobic water outlet, 5-venturi tube mixer, 6-venturi tube mixer water inlet, 7-venturi tube mixer air inlet, 8-venturi tube mixer water outlet, 9-hydrocyclone, 10-hydrocyclone water inlet, 11-hydrocyclone exhaust port, 12-hydrocyclone water outlet, 13-jet aeration tank, 14-aeration tank water inlet, 15-aeration tank water outlet, 16-jet aeration tank, 17-inclined plate sedimentation tank, 18-sedimentation tank water inlet, 19-inclined plate, 20-sedimentation tank water outlet and 21 sludge discharge port.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1, the specific implementation of the present invention includes a high efficiency anaerobic reactor 1, a venturi tube mixer 5, a hydrocyclone 9, a jet aeration tank 13, an inclined plate sedimentation tank 17 and an aerobic tank which are connected in sequence, i.e. the high efficiency anaerobic reactor 1, the venturi tube mixer 5, the hydrocyclone 9, the jet aeration tank 13, the inclined plate sedimentation tank 17 and the aerobic tank are connected in sequence.
The lower part of the high-efficiency anaerobic reactor 1 is provided with an anaerobic water inlet 2, the top part is provided with an anaerobic exhaust port 3, the upper part is provided with an anaerobic water outlet 4, the anaerobic water outlet 4 is used as the outlet of the high-efficiency anaerobic reactor 1, anaerobic inlet water enters from the anaerobic water inlet 2, and biogas generated by anaerobic is discharged from the anaerobic exhaust port 3. One end of the Venturi pipeline mixer 5 is provided with a Venturi pipeline mixer water inlet 6, the other end of the Venturi pipeline mixer 5 is provided with a Venturi pipeline mixer water outlet 8, and the top of the reducing area of the Venturi pipeline mixer 5 is provided with a Venturi pipeline mixer air inlet 7; the upper part of the hydrocyclone 9 is provided with a hydrocyclone water inlet 10, the top part is provided with a hydrocyclone exhaust port 11, and the lower part is provided with a hydrocyclone water outlet 12; the lower part of the jet aeration tank 13 is provided with an aeration tank water inlet 14, the upper part is provided with an aeration tank water outlet 15, and the bottom of the tank is provided with a jet aerator 16; one side of the upper part of the inclined plate sedimentation tank 17 is provided with a sedimentation tank water inlet 18, the other side of the upper part is provided with a sedimentation tank water outlet 20, the bottom is provided with a sludge discharge port 21, and the middle of the inner part is provided with an inclined plate 19.
An anaerobic water outlet 4 at the outlet of the high-efficiency anaerobic reactor 1 is communicated to a venturi tube mixer water inlet 6 through a pipeline, a venturi tube mixer water outlet 8 is communicated to a hydrocyclone water inlet 10 through a pipeline, a hydrocyclone water outlet 12 is communicated to an aeration tank water inlet 14 through a pipeline, an aeration tank water outlet 15 is communicated to a sedimentation tank water inlet 18 through a pipeline, and a sedimentation tank water outlet 20 is communicated to an aerobic tank through a pipeline.
The utility model discloses the theory of operation process of high-efficient anaerobism of waste paper papermaking waste water play water degasification decalcification system is as follows:
anaerobic inlet water is pumped into the high-efficiency anaerobic reactor 1 through the anaerobic water inlet 2 for anaerobic biochemical treatment, biogas generated by anaerobic treatment is discharged through the anaerobic exhaust port 3, anaerobic outlet water is discharged through the anaerobic water outlet 4 and enters the venturi pipe mixer 5 through the water inlet 6 of the venturi pipe mixer.
In venturi pipeline mixer reducing area, because the pipeline diameter diminishes, the waste water velocity of flow becomes big, forms the negative pressure at the reducing district this moment, and air is inhaled and is carried out gas-liquid mixture with waste water by venturi pipeline mixer air inlet 7, and then waste water passes through venturi pipeline mixer delivery port 8 and discharges, gets into hydrocyclone 9 through hydrocyclone water inlet 10.
The hydrocyclone 9 frees the gas with low density to the centre of the hydrocyclone by means of the centrifugal force generated by the helical flow of the high-speed fluid, while throwing the water with high density to the outer wall, and by maintaining the underflow at high pressure, forces the gas in the centre of the vortex to flow in counter-current and to be discharged through the hydrocyclone outlet 11, while the degassed waste water passes through the hydrocyclone outlet 12 and enters the jet aeration tank 13 through the aeration tank inlet 14.
The jet aeration tank 13 is aerated by air through the jet aerator 16 at the bottom of the tank, the concentration of dissolved oxygen in the wastewater rises, most of dissolved carbon dioxide is removed by aeration, the pH of the wastewater tends to rise, and the dissolved Ca (HCO) in the wastewater is3)2To CaCO3Conversion with CaCO3Crystal precipitationThe aerated wastewater is discharged from a water outlet 15 of the aeration tank and enters an inclined plate sedimentation tank 17 through a water inlet 18 of the sedimentation tank.
The inclined plate sedimentation tank 17 is internally provided with a group of inclined plates 19, the plates are arranged at an angle of 45-60 degrees with the horizontal plane, the inclined plate sedimentation increases the sedimentation area, shortens the sedimentation time, and simultaneously changes the water flow between the plates from turbulent flow to laminar flow, thereby effectively improving the sedimentation efficiency and precipitating CaCO3The material slides into a mud bucket at the bottom of the sedimentation tank under the action of gravity and is periodically discharged through a mud discharge port 21, and the waste water after degassing and calcium removal is discharged through a water outlet 20 of the sedimentation tank and pumped into an aerobic tank.
The utility model discloses arranged venturi way blender 5, hydrocyclone 9, jet aeration pond 13 and inclined plate sedimentation tank 17 in proper order between anaerobism and aerobic treatment, four process that link up in succession have constituted holistic technical scheme, compare the process of other multiple technology processing combinations and can more effectively get rid of carbon dioxide and the calcium ion of dissolving state in the high-efficient anaerobism effluent.
And between the venturi mixer 5 and the hydrocyclone 9, the waste water increases in pressure due to the suction of air in the venturi mixer 5, the greater the discharge pressure of the venturi mixer 5, the higher the degassing efficiency of the hydrocyclone 9.
And between the hydrocyclone 9 and the jet aeration tank 13, the hydrocyclone 9 is adopted as a first-stage degassing unit, the jet aeration tank 13 is adopted as a second-stage degassing unit, and under the continuous water treatment of the hydrocyclone 9 and the jet aeration tank 13, the higher the degassing efficiency of the hydrocyclone 9 is, the better the carbon dioxide removal effect of the jet aeration tank 13 is, the higher the pH value of the wastewater rises, and the higher the CaCO is3The faster the crystals precipitate.
And between the jet aeration tank 13 and the inclined plate sedimentation tank 17, the better the carbon dioxide removal effect of the jet aeration tank 13 is, CaCO3The faster the crystals are separated out, and CaCO in the inclined plate sedimentation tank 173The higher the precipitation efficiency, the better the calcium removal effect of the system.
Therefore, the aim of deep degassing and calcium removal of anaerobic effluent can be achieved through the continuous arrangement and treatment of venturi tube mixing, hydraulic cyclone, jet aeration and inclined plate sedimentation.
Example 1
In specific implementation, the high-efficiency anaerobic effluent degassing and calcium removal method for certain waste paper and paper mill in Jiaxing city of Zhejiang province of the utility model adopts the experiment implementation process of Venturi tube mixing, hydraulic cyclone, jet aeration and inclined plate sedimentation, and the wastewater treatment scale is 20m3D, the water inlet pressure of the Venturi tube mixer is 0.15Mpa, and the air flow is 40m3The flow dividing ratio of the exhaust port of the hydrocyclone is 0.40, the cone angle of the large cone section is 17 degrees, the gas-water ratio of the jet aeration tank is 2500, the hydraulic retention time is 30min, the inclined plate installation angle of the inclined plate sedimentation tank is 60 degrees, and the design surface load is 4.0m3/(m2.h) The hydraulic retention time is 20min, and the anaerobic effluent quality is as follows: chemical Oxygen Demand (COD)Cr) 973mg/L, Inorganic Carbon (IC) concentration of 482mg/L, calcium ion (Ca)2+) The concentration is 1100mg/L, and the pH is 7.21; the water quality of the outlet water of the inclined plate sedimentation tank is as follows: CODCr895mg/L, IC concentration 248mg/L, Ca2+The concentration was 674mg/L, pH 7.36.
Example 2 and comparative example
The utility model discloses still contrast the implementation under the high-efficient anaerobism of a certain papermaking enterprise goes out water degasification decalcification technology transformation condition in Pinghu City of Zhejiang province, former technology is "surface aeration + ordinary sediment", and the waste water treatment scale is 10000m3And d. The anaerobic effluent quality is as follows: CODCr961mg/L, IC concentration 482mg/L, Ca2+The concentration is 1088mg/L, and the pH is 7.21; the effluent quality of the aeration sedimentation tank is as follows: CODCr875mg/L, IC concentration 338mg/L, Ca2+The concentration was 881mg/L, the pH was 7.33.
The effluent quality of the aerobic tank in comparison implementation is as follows: CODCr145mg/L, IC concentration 174mg/L, Ca2+The concentration was 610mg/L and the pH was 7.53.
Adopt the utility model discloses a system and method carry out technical transformation on above-mentioned contrast implementation basis, and the calcium removal technology that degasses is "venturi way mixes + hydraulic cyclone + efflux aeration + inclined plate sedimentation", and waste water treatment scale is 10000m equally3And d. The water inlet pressure of the Venturi pipeline mixer is0.25Mpa, air flow 100m3H; the flow dividing ratio of the exhaust port of the hydrocyclone is 0.44, and the taper angle of the large cone section is 18 degrees; the gas-water ratio of the jet aeration tank is 2500, and the hydraulic retention time is 20 min; the inclined plate installation angle of the inclined plate sedimentation tank is 60 degrees, and the design surface load is 3.5m3/(m2.h) The hydraulic retention time is 20min, and the water outlet quality of the inclined plate sedimentation tank is as follows: CODCr688mg/L, IC concentration 243mg/L, Ca2+The concentration was 606mg/L and the pH was 7.46.
The embodiment of the utility model provides an it is still further contrast good oxygen pond water quality of water to be: CODCr112mg/L, IC concentration 148mg/L, Ca2+The concentration was 483mg/L, and the pH was 7.68.
Finally, the comparison result of water treatment is visible in the utility model discloses the system can be more effective desorption anaerobism go out the water under the water treatment under the same condition dissolved carbon dioxide, the CaCO that appears3Good removing effect and better water quality.
It can be seen from the above implementation that, under the technical scheme of the utility model, the degassing and decalcification efficiency of the anaerobic effluent is high, and the water quality of the produced water is good.
The utility model discloses the two-stage degasification unit that make full use of venturi way blender, hydrocyclone and jet aeration pond constitute in proper order has effectively got rid of the dissolved state carbon dioxide in the waste water, has promoted dissolved state Ca (HCO) in the waste water3)2To CaCO3And efficiently removes CaCO in the wastewater by using inclined plate sedimentation3The stable proceeding of the subsequent aerobic biochemical reaction is powerfully guaranteed; and the hydraulic pressure head of anaerobic effluent is fully utilized, and the power consumption cost in the wastewater conveying process is saved.
The above-mentioned embodiments are provided for explaining the present invention, and not for limiting the present invention, and any modifications and changes made by the present invention are within the protection scope of the spirit and principle of the present invention.
Claims (6)
1. The utility model provides a waste paper papermaking waste water high efficiency anaerobism goes out water degasification decalcification system, includes high-efficient anaerobic reactor (1) and aerobic tank, its characterized in that: the device is characterized by further comprising a venturi pipeline mixer (5), a hydrocyclone (9), a jet aeration tank (13) and an inclined plate sedimentation tank (17) which are connected between the high-efficiency anaerobic reactor (1) and the aerobic tank in sequence, wherein one end of the venturi pipeline mixer (5) is provided with a venturi pipeline mixer water inlet (6), the other end of the venturi pipeline mixer water outlet (8), and the top of the reducing area of the venturi pipeline mixer (5) is provided with a venturi pipeline mixer air inlet (7); the upper part of the hydrocyclone (9) is provided with a hydrocyclone water inlet (10), the top part is provided with a hydrocyclone exhaust port (11), and the lower part is provided with a hydrocyclone water outlet (12); the lower part of the jet aeration tank (13) is provided with an aeration tank water inlet (14), the upper part is provided with an aeration tank water outlet (15), and the bottom of the tank is provided with a jet aerator (16); a sedimentation tank water inlet (18) is arranged on one side of the upper part of the inclined plate sedimentation tank (17), a sedimentation tank water outlet (20) is arranged on the other side of the upper part, a sludge discharge port (21) is arranged at the bottom, and an inclined plate (19) is arranged in the middle of the inner part of the inclined plate sedimentation tank; the outlet of the high-efficiency anaerobic reactor (1) is communicated to a venturi tube mixer water inlet (6) through a pipeline, a venturi tube mixer water outlet (8) is communicated to a hydrocyclone water inlet (10) through a pipeline, a hydrocyclone water outlet (12) is communicated to an aeration tank water inlet (14) through a pipeline, an aeration tank water outlet (15) is communicated to a sedimentation tank water inlet (18) through a pipeline, and a sedimentation tank water outlet (20) is communicated to an aerobic tank through a pipeline.
2. The high-efficiency anaerobic effluent degassing and calcium removing system for waste paper papermaking wastewater as claimed in claim 1, wherein: in the jet aeration tank (13), the gas-water ratio is 2500-3500, and the hydraulic retention time is 20-30 min.
3. The high-efficiency anaerobic effluent degassing and calcium removing system for waste paper papermaking wastewater as claimed in claim 1, wherein: the inclined plate (19) in the inclined plate sedimentation tank (17) is obliquely arranged at an angle of 45-60 degrees with the horizontal plane, and inclines downwards along the direction vertical to the water inlet (18) of the sedimentation tank to the water outlet (20) of the sedimentation tank, and the designed surface load is 3.0m3/(m2.h)～4.0m3/(m2H), the hydraulic retention time is 15 min-20 min.
4. The high-efficiency anaerobic effluent degassing and calcium removing system for waste paper papermaking wastewater as claimed in claim 1, wherein: in the Venturi pipeline mixer (5), the water inlet pressure is 0.15 Mpa-0.30 Mpa, and the air flow is 40m3/h～100m3/h。
5. The high-efficiency anaerobic effluent degassing and calcium removing system for waste paper papermaking wastewater as claimed in claim 1, wherein: in the hydrocyclone (9), the flow dividing ratio of the hydrocyclone exhaust port (11) is 0.40-0.50, and the large cone section has a cone angle of 16-20 degrees.
6. The high-efficiency anaerobic effluent degassing and calcium removing system for waste paper papermaking wastewater as claimed in claim 1, wherein: the anaerobic reactor is characterized in that an anaerobic water inlet (2) is arranged at the lower part of the high-efficiency anaerobic reactor (1), an anaerobic exhaust port (3) is arranged at the top of the high-efficiency anaerobic reactor, an anaerobic water outlet (4) is arranged at the upper part of the high-efficiency anaerobic reactor, and the anaerobic water outlet (4) is used as an outlet of the high-efficiency anaerobic reactor (1).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111573998A (en) * | 2020-06-12 | 2020-08-25 | 浙江大学 | High-efficient anaerobism of waste paper papermaking waste water goes out water degasification decalcification system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111573998A (en) * | 2020-06-12 | 2020-08-25 | 浙江大学 | High-efficient anaerobism of waste paper papermaking waste water goes out water degasification decalcification system |
| CN111573998B (en) * | 2020-06-12 | 2023-07-11 | 浙江大学 | High-efficient anaerobic water-out degasification removes calcium system of waste paper papermaking waste water |
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