CN112794440A - High-efficiency impact-resistant UASB reactor - Google Patents
High-efficiency impact-resistant UASB reactor Download PDFInfo
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- CN112794440A CN112794440A CN202011603335.4A CN202011603335A CN112794440A CN 112794440 A CN112794440 A CN 112794440A CN 202011603335 A CN202011603335 A CN 202011603335A CN 112794440 A CN112794440 A CN 112794440A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
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Abstract
The invention provides a high-efficiency impact-resistant UASB reactor, and relates to the technical field of sewage treatment. The UASB reactor includes: the device comprises a tank body, a three-phase separator, a water inlet pipe, a water outlet pipe, an exhaust pipe and a sludge discharge pipe; the three-phase separator includes: the biogas collecting plate, the biogas collecting chamber and the biogas collecting pipe. In the invention, in the process that sewage in the reaction zone flows along the arc-shaped long plate, the arc-shaped long plate pressurizes and accelerates the water flow, so that negative pressure is generated at the gap between the adjacent biogas collecting plates from top to bottom, and backflow from the settling zone to the reaction zone along the direction of the gap is formed, on one hand, power and a channel are provided for returning sludge settled in the settling zone to the reaction zone, and on the other hand, thrust generated by backflow also provides power for accelerating the water flow in the reaction zone; the sewage impact force along the water inlet pipe direction is matched with the backflow thrust force, so that the stirring strength of the sewage and the sludge is guaranteed, the anaerobic reaction efficiency of the sewage and the sludge is improved, and the problems of weak stirring strength and poor impact resistance of the conventional UASB reactor are solved.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a high-efficiency impact-resistant UASB reactor.
Background
The upflow anaerobic sludge blanket reactor (UASB reactor for short) is composed of three functional areas, namely a water distribution area at the bottom, a reaction area at the middle and a gas-liquid-solid three-phase separation area (including a sedimentation area) at the top. The working process of the UASB reactor is as follows: sewage flows into the reactor from the bottom of the reactor, the sewage is mixed and contacted with sludge in the sludge layer, and anaerobic microorganisms in the sludge decompose organic matters in the sewage and convert the organic matters into methane. The marsh gas is continuously discharged in a micro-bubble form, the micro-bubbles are continuously merged in the rising process to gradually form larger bubbles, under the collision, combination and rising stirring action of the bubbles, the sludge above a sludge bed is in a loose state, and the sludge and the sewage are fully mixed to form sludge-sewage mixed liquid. Most of the organic matters in the sewage are decomposed and converted in the reaction zone. The upper part of the UASB reactor is provided with a gas-liquid-solid three-phase separator, sludge and sewage mixed liquid containing a large amount of bubbles continuously rises to reach the lower part of the three-phase separator, the biogas is firstly separated, and the separated biogas enters a gas chamber and is discharged out of the UASB reactor. The sludge-sewage mixed liquor upwards passes through the three-phase separator to reach a settling zone, sludge which loses the stirring effect is flocculated to form sludge particles, the sludge particles are gradually increased, and the sludge particles downwards pass through the three-phase separator under the action of gravity to settle to a sludge reaction zone at the lower part of the three-phase separator, so that sufficient biomass is kept in the UASB reactor. The sewage from which the sludge is separated is further clarified in the settling zone, and the clarified sewage is discharged from the UASB reactor through the effluent weir.
The core components of the UASB reactor are a three-phase separator and an inlet water distribution component. The existing three-phase separator has the defect that the upward flow of sewage flowing upwards and the backflow of sludge flowing downwards interfere with each other. The existing UASB reactor only depends on the methane generated in the sludge blanket to stir the sludge blanket, when the quality and the load of the sewage suddenly change, the methane generated in the sludge blanket is reduced, the stirring strength of the methane to the sludge blanket can be reduced, and the impact resistance of the existing UASB reactor is poor. The above disadvantages reduce the treatment efficiency of the existing UASB reactor.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a high-efficiency impact-resistant UASB reactor, which solves the problems of weak stirring strength and poor impact resistance of the UASB reactor.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
an efficient impact resistant UASB reactor, comprising: the device comprises a tank body, a three-phase separator, a water inlet pipe, a water outlet pipe, an exhaust pipe and a sludge discharge pipe; the three-phase separator is positioned in the middle of the tank body and divides the tank body into a reaction zone at the lower part and a precipitation zone at the upper part;
the water inlet pipe is tangentially communicated with the reaction zone;
the water outlet pipe is communicated with the upper part of the settling zone;
the exhaust pipe is communicated with the top of the tank body;
the sludge discharge pipe is communicated with the bottom of the tank body;
the three-phase separator includes: the biogas collecting plate, the biogas collecting chamber and the biogas collecting pipe; the marsh gas collecting plate is radially arranged from the center to the outside, and the marsh gas collecting plate comprises: the arc-shaped long plate and the arc-shaped short plate; the top of the arc-shaped long plate is connected with the top of the short plate to form an inverted methane collecting channel; the free end of the arc-shaped long plate extends along the sewage flow direction in the reaction zone;
the biogas collecting chamber is an annular inverted buckle gas chamber and is arranged above the outer end of the biogas collecting plate, and a notch is formed in the top of the biogas collecting plate in the biogas collecting chamber;
the bottom end of the methane collecting pipe is communicated with the top end of the methane collecting chamber;
one overflow plate is arranged at intervals of one or more methane collecting plates and is arranged on the upper surface of the free end of the arc-shaped long plate.
Preferably, a sewage pump is installed on the water inlet pipe.
Preferably, the water inlet pipe comprises: the bottom water inlet pipe is positioned at the bottom of the reaction zone; the speed-up water inlet pipe is positioned at the upper part of the reaction zone.
Preferably, the included angle between the arc-shaped long plate and the horizontal plane is gradually reduced from the top to the bottom.
Preferably, the top of the biogas collecting channel is gradually raised from the center to the outside.
Preferably, the biogas collection chamber is hermetically connected with the inner wall of the middle part of the tank body.
Preferably, the inner wall of the tank body at the water outlet pipe is provided with an overflow weir, and the water outlet pipe is positioned at the bottom of the overflow weir.
Preferably, the top end of the biogas collection pipe is higher than the top of the overflow weir.
(III) advantageous effects
The invention provides a high-efficiency impact-resistant UASB reactor. Compared with the prior art, the method has the following beneficial effects:
in the invention, in the process that sewage in the reaction zone flows along the arc-shaped long plate, the arc-shaped long plate pressurizes and accelerates the water flow, so that negative pressure is generated at the gap between the adjacent biogas collecting plates from top to bottom, and backflow from the settling zone to the reaction zone along the direction of the gap is formed, on one hand, power and a channel are provided for returning sludge settled in the settling zone to the reaction zone, and on the other hand, thrust generated by backflow also provides power for accelerating the water flow in the reaction zone; the sewage impact force along the water inlet pipe direction is matched with the backflow thrust force, so that the stirring strength of the sewage and the sludge is guaranteed, the anaerobic reaction efficiency of the sewage and the sludge is improved, and the problems of weak stirring strength and poor impact resistance of the conventional UASB reactor are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram showing the internal structure of a UASB reactor in the embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a three-phase separator according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a biogas collecting plate in the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of this application has solved the UASB reactor and has stirred intensity weak, the poor problem of impact resistance through providing a high-efficient resistant UASB reactor of assaulting.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
in the embodiment of the invention, in the process that sewage in the reaction zone flows along the arc-shaped long plate, the arc-shaped long plate pressurizes and accelerates the water flow, so that negative pressure is generated at the gap between the adjacent biogas collecting plates from top to bottom, and backflow from the settling zone to the reaction zone along the direction of the gap is formed, on one hand, power and a channel are provided for returning sludge settled in the settling zone to the reaction zone, and on the other hand, thrust generated by backflow also provides power for accelerating the water flow in the reaction zone; the sewage impact force along the water inlet pipe direction is matched with the backflow thrust force, so that the stirring strength of the sewage and the sludge is guaranteed, the anaerobic reaction efficiency of the sewage and the sludge is improved, and the problems of weak stirring strength and poor impact resistance of the conventional UASB reactor are solved.
In addition, the overflow plate is arranged on the upper surface of the free end of the arc-shaped long plate at intervals of one or more methane collecting plates, so that the influence of negative pressure generated at the corresponding gap on the settling zone is prevented, the gap does not form backflow, and the gap provides a channel for overflowing sewage in the reaction zone to the settling zone.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example (b):
as shown in fig. 1 to 3, the present invention provides a high-efficiency impact-resistant UASB reactor, comprising: the device comprises a tank body 10, a three-phase separator 20, a water inlet pipe 30, a water outlet pipe 40, an exhaust pipe 50 and a sludge discharge pipe 60; the three-phase separator 20 is positioned in the middle of the tank body 10 and divides the tank body 10 into a reaction zone 11 at the lower part and a precipitation zone 12 at the upper part;
the water inlet pipe 30 is tangentially communicated with the reaction zone 11, so that sewage enters the reaction zone 11 through the water inlet pipe 30 and then rotationally flows along the inner side wall of the tank body 10, and the stirring intensity is improved;
the water outlet pipe 40 is communicated with the upper part of the sedimentation zone 12, and sewage after anaerobic reaction and clarification is discharged through the water outlet pipe 40;
the exhaust pipe 50 is communicated with the top of the tank body 10; a small amount of biogas generated in the settling zone 12 is discharged through an exhaust pipe 50;
the sludge discharge pipe 60 is communicated with the bottom of the tank body 10; providing a channel for sludge discharge;
the three-phase separator 20 includes: a biogas collecting plate 21, a biogas collecting chamber 22 and a biogas collecting pipe 23; the biogas collecting plates 21 are radially arranged from the center to the outside, and the biogas collecting plates 21 include: arc-shaped long plates 211 and short plates 212; the top of the arc-shaped long plate 211 is connected with the top of the short plate 212 to form an inverted methane collecting channel; the free end of the arc-shaped long plate 211 extends along the sewage flow direction (direction A) in the reaction area 11, and in the process that the sewage in the reaction area 11 flows along the arc-shaped long plate 211, the arc-shaped long plate 211 boosts the water flow to increase the speed, so that negative pressure from top to bottom is generated at the gap between the adjacent methane collecting plates 21, a backflow from the settling area 12 to the reaction area 11 is formed along the gap direction, on one hand, power and a channel are provided for returning the sludge settled in the settling area 12 to the reaction area 11, and on the other hand, the thrust generated by the backflow also provides power for increasing the speed of the water flow in the reaction area 11. The sewage impact force along the direction of the water inlet pipe 30 is matched with the back flow thrust force, so that the stirring strength of the sewage and the sludge is ensured, the anaerobic reaction efficiency of the sewage and the sludge is improved, and the problems of weak stirring strength and poor impact resistance of the conventional UASB reactor are solved;
the biogas collection chamber 22 is an annular inverted air chamber and is arranged above the outer end of the biogas collection plate 21, a notch 213 is formed in the top of the biogas collection plate 21 in the biogas collection chamber 22, and biogas in the biogas collection channel enters the biogas collection chamber 22 through the notch 213;
the bottom end of the biogas collecting pipe 23 is communicated with the top end of the biogas collecting chamber 22;
every other one or more biogas collecting plates 21 are provided with an overflow plate 24, the overflow plate 24 is arranged on the upper surface of the free end of the arc-shaped long plate 211, the influence of negative pressure generated at the corresponding gap on the settling zone 12 is blocked, so that the gap does not form backflow, and the gap provides a channel for the sewage in the reaction zone 11 to overflow to the settling zone 12.
The included angle epsilon [30 degrees and 150 degrees ] between the overflow plate 24 and the arc-shaped long plate 211 ensures that the overflow plate 24 can effectively block the influence of the negative pressure generated at the corresponding gap on the settling zone 12, so that the gap does not form backflow.
The inlet pipe 30 is provided with a sewage pump to increase the initial flow rate of sewage entering the reaction zone 11 through the inlet pipe 30.
As shown in fig. 1, the water inlet pipe 30 includes: the bottom water inlet pipe 31 is positioned at the bottom of the reaction zone, and provides power for stirring bottom sludge, so that the sewage and the sludge are fully mixed, and the anaerobic reaction efficiency of the sewage and the sludge is improved; the speed-up water inlet pipe 32 is positioned at the upper part of the reaction zone, and the flow velocity of the sewage below the three-phase separator 20 is improved to provide power for generating reflux negative pressure.
As shown in fig. 2 and 3, from the top to the bottom, the included angle between the arc-shaped long plate 211 and the horizontal plane gradually decreases, so that the resistance of the arc-shaped long plate 211 to the water flow below the arc-shaped long plate is weakened, and the flow rate of the water flow below the arc-shaped long plate 211 is increased to the maximum extent.
As shown in fig. 1 to 3, the top of the biogas collecting channel gradually rises from the center to the outside, further promoting the movement of biogas in the biogas collecting channel to the biogas collecting chamber 22 at the outer end.
As shown in fig. 1, the biogas collection chamber 22 is hermetically connected to the middle inner wall of the tank 10.
As shown in fig. 1, the inner wall of the tank 10 at the outlet pipe 40 is provided with an overflow weir 41, and the outlet pipe 40 is located at the bottom of the overflow weir 41.
As shown in fig. 1, the top end of the biogas collection pipe 23 is higher than the top of the overflow weir 41, preventing sewage from flowing out of the biogas collection pipe 23.
The working process of the UASB reactor is as follows: after being pressurized by the sewage pump, the sewage respectively enters the reaction zone 11 through the bottom water inlet pipe 31 and the speed-up water inlet pipe 32 along the tangential direction, so that the sewage in the reaction zone 11 rotationally flows along the inner side wall of the tank body 10, the sewage and the sludge in the reaction zone 11 are fully stirred, and anaerobic microorganisms in the sludge decompose organic matters in the sewage and the sludge to generate methane.
After the sewage sludge mixed liquid and the methane rise to the lower end of the three-phase separator 20, the sewage sludge mixed liquid flows into the settling zone 12 through a gap provided with an overflow plate 24; the biogas enters the biogas collection chamber 22 through the biogas collection plate 21 and is then discharged through the biogas collection pipe 23.
The sewage sludge mixed liquid in the settling zone 12 is flocculated to form sludge particles, the sludge particles are gradually increased, and the sludge particles flow back to the reaction zone 11 through a gap without an overflow plate 24 under the action of gravity; the sewage from which the sludge is separated is further clarified in the settling zone 12 and then discharged through an overflow weir 41 and a water outlet pipe 40; a small amount of biogas generated in the settling zone 12 is discharged through the exhaust pipe 50.
After the UASB reactor is operated for a certain period of time, sludge and a part of sewage at the bottom of the tank 10 are discharged through the sludge discharge pipe 60.
In summary, compared with the prior art, the invention has the following beneficial effects:
1. in the embodiment of the invention, in the process that sewage in the reaction zone flows along the arc-shaped long plate, the arc-shaped long plate pressurizes and accelerates the water flow, so that negative pressure is generated at the gap between the adjacent biogas collecting plates from top to bottom, and backflow from the settling zone to the reaction zone along the direction of the gap is formed, on one hand, power and a channel are provided for returning sludge settled in the settling zone to the reaction zone, and on the other hand, thrust generated by backflow also provides power for accelerating the water flow in the reaction zone; the sewage impact force along the water inlet pipe direction is matched with the backflow thrust force, so that the stirring strength of the sewage and the sludge is guaranteed, the anaerobic reaction efficiency of the sewage and the sludge is improved, and the problems of weak stirring strength and poor impact resistance of the conventional UASB reactor are solved.
2. In the embodiment of the invention, one overflow plate is arranged at intervals of one or more methane collecting plates and arranged on the upper surface of the free end of the arc-shaped long plate, so that the influence of negative pressure generated at the corresponding gap on the settling zone is prevented, the gap does not form backflow, and the gap provides a channel for overflowing sewage in the reaction zone to the settling zone.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. An efficient impact resistant UASB reactor, comprising: the device comprises a tank body (10), a three-phase separator (20), a water inlet pipe (30), a water outlet pipe (40), an exhaust pipe (50) and a sludge discharge pipe (60); the three-phase separator (20) is positioned in the middle of the tank body (10) and divides the tank body (10) into a reaction zone (11) at the lower part and a settling zone (12) at the upper part;
the water inlet pipe (30) is tangentially communicated with the reaction zone (11);
the water outlet pipe (40) is communicated with the upper part of the settling zone (12);
the exhaust pipe (50) is communicated with the top of the tank body (10);
the sludge discharge pipe (60) is communicated with the bottom of the tank body (10);
the three-phase separator (20) comprises: a biogas collecting plate (21), a biogas collecting chamber (22) and a biogas collecting pipe (23); the biogas collecting plates (21) are radially arranged from the center to the outside, and the biogas collecting plates (21) comprise: an arc-shaped long plate (211) and a short plate (212); the top of the arc-shaped long plate (211) is connected with the top of the short plate (212) to form an inverted methane collecting channel; the free end of the arc-shaped long plate (211) extends along the sewage flow direction in the reaction zone (11);
the biogas collecting chamber (22) is an annular inverted air chamber and is arranged above the outer end of the biogas collecting plate (21), and a notch (213) is formed in the top of the biogas collecting plate (21) in the biogas collecting chamber (22);
the bottom end of the biogas collecting pipe (23) is communicated with the top end of the biogas collecting chamber (22);
one overflow plate (24) is arranged at intervals of one or more methane collecting plates (21), and the overflow plate (24) is arranged on the upper surface of the free end of the arc-shaped long plate (211).
2. A high efficiency impact resistant UASB reactor as claimed in claim 1 wherein a sewage pump is mounted on the inlet pipe (30).
3. A high efficiency impact resistant UASB reactor as claimed in claim 2 wherein the water inlet pipe (30) comprises: a bottom water inlet pipe (31) and a speed-up water inlet pipe (32), wherein the bottom water inlet pipe (31) is positioned at the bottom of the reaction zone; the speed-up water inlet pipe (32) is positioned at the upper part of the reaction zone.
4. A UASB reactor with high efficiency and impact resistance as recited in claim 1, wherein the angle between the arc-shaped long plate (211) and the horizontal plane is gradually decreased from the top to the bottom.
5. A high efficiency impact resistant UASB reactor as claimed in claim 1 wherein the top of the biogas collection channels are gradually raised from the center to the outside.
6. A UASB reactor with high efficiency and impact resistance according to any of claims 1-5, characterized in that the biogas collection chamber (22) is sealingly connected to the middle inner wall of the tank (10).
7. A UASB reactor with high efficiency and impact resistance according to any of claims 1-5, wherein the inner wall of the tank (10) at the outlet pipe (40) is provided with an overflow weir (41), and the outlet pipe (40) is located at the bottom of the overflow weir (41).
8. A high efficiency impact resistant UASB reactor as claimed in claim 7 wherein the top of the biogas collection pipe (23) is above the top of the weir (41).
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203999125U (en) * | 2014-08-01 | 2014-12-10 | 河南博奥皮业有限公司 | A kind of UASB reaction tank |
| CN204211533U (en) * | 2014-10-22 | 2015-03-18 | 中持水务股份有限公司 | Forward spin flow is unpowered circulation anaerobic reactor |
| CN106277311A (en) * | 2016-10-21 | 2017-01-04 | 大连碧蓝节能环保科技有限公司 | Water conservancy diversion impeller up flow anaerobic sludge blanket reactor |
| CN106430566A (en) * | 2016-10-29 | 2017-02-22 | 大连碧蓝节能环保科技有限公司 | Double filler and self-cleaning anaerobic expanded bed bioreactor |
| CN206538255U (en) * | 2017-03-20 | 2017-10-03 | 浙江为环科技有限公司 | A kind of UASB anaerobic reactors |
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2020
- 2020-12-29 CN CN202011603335.4A patent/CN112794440B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203999125U (en) * | 2014-08-01 | 2014-12-10 | 河南博奥皮业有限公司 | A kind of UASB reaction tank |
| CN204211533U (en) * | 2014-10-22 | 2015-03-18 | 中持水务股份有限公司 | Forward spin flow is unpowered circulation anaerobic reactor |
| CN106277311A (en) * | 2016-10-21 | 2017-01-04 | 大连碧蓝节能环保科技有限公司 | Water conservancy diversion impeller up flow anaerobic sludge blanket reactor |
| CN106430566A (en) * | 2016-10-29 | 2017-02-22 | 大连碧蓝节能环保科技有限公司 | Double filler and self-cleaning anaerobic expanded bed bioreactor |
| CN206538255U (en) * | 2017-03-20 | 2017-10-03 | 浙江为环科技有限公司 | A kind of UASB anaerobic reactors |
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