CN220845732U - Improved system for enhancing concentration of residual sludge by offline washing pool of MBR (Membrane biological reactor) membrane module device - Google Patents
Improved system for enhancing concentration of residual sludge by offline washing pool of MBR (Membrane biological reactor) membrane module device Download PDFInfo
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- CN220845732U CN220845732U CN202322592758.6U CN202322592758U CN220845732U CN 220845732 U CN220845732 U CN 220845732U CN 202322592758 U CN202322592758 U CN 202322592758U CN 220845732 U CN220845732 U CN 220845732U
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- 239000010802 sludge Substances 0.000 title claims abstract description 106
- 239000012528 membrane Substances 0.000 title claims abstract description 61
- 238000005406 washing Methods 0.000 title claims abstract description 37
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 230000005484 gravity Effects 0.000 claims abstract description 18
- 238000005554 pickling Methods 0.000 claims abstract description 18
- 238000009826 distribution Methods 0.000 claims abstract description 11
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 15
- 230000018044 dehydration Effects 0.000 abstract description 7
- 238000006297 dehydration reaction Methods 0.000 abstract description 7
- 239000012141 concentrate Substances 0.000 abstract description 2
- 238000000265 homogenisation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 206010013496 Disturbance in attention Diseases 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model provides an improved system for enhancing residual sludge concentration by utilizing an MBR (Membrane biological reactor) membrane module offline washing tank, which comprises an MBR membrane tank, a water distribution channel, an offline washing tank and a gravity concentration tank, wherein a residual sludge inlet arc channel is arranged at the lower part of the washing tank, and the downstream of a residual sludge pump is connected to the residual sludge inlet arc channel; the lower part of the alkaline washing tank is provided with a surplus sludge water collecting port which is connected to the upstream of a surplus sludge pump through a pipeline; the upper part of the pickling tank is provided with a pickling tank water outlet pipeline connected to the clean water tank, and the upper part of the clean water tank is provided with a clean water tank water outlet pipeline connected to the upper part of the alkaline washing tank. The system fully utilizes the idle stage of the MBR membrane cleaning tank to concentrate the sludge, enlarges the residual sludge concentration residence time, realizes the stable homogenization of the residual sludge in the gravity concentration tank, and realizes the saving, high efficiency and stability of sludge dehydration. The system is simple and feasible, and saves equipment investment and operation cost.
Description
Technical Field
The utility model relates to an offline cleaning system of an MBR (Membrane biological reactor) membrane module, in particular to an offline cleaning system of an MBR membrane module by improving and enhancing concentration of excess sludge
Background
MBR is a novel water treatment technology combining an activated sludge process with a membrane separation technology. When in use, the MBR membrane is polluted by impurities in raw water, so that the MBR membrane is polluted and blocked, and the MBR membrane is required to be cleaned. Most plants adopting the MBR process can build an offline cleaning soaking tank of the membrane group device, and generally comprise an alkaline cleaning tank, an acid cleaning tank and an intermediate clean water tank, and the MBR membrane is chemically cleaned by using different cleaning agents to realize sludge treatment.
The sludge generated by the sludge treatment system has the characteristic of high water content, and is inconvenient to convey, treat or dispose. The sludge concentration can lead the sludge to be primarily reduced in volume, and gravity concentration is currently used as a main means in China. Therefore, in the MBR process sewage plant, a gravity concentration tank is usually arranged in the excess sludge system (the retention time of the excess sludge is generally 2-3 hours) so as to barely meet the dehydration requirement of the excess sludge, but the volume of the gravity concentration tank is small so as not to cope with the emergency such as sludge expansion and the like, and the gravity concentration tank has great limitation on cost control.
Therefore, on the basis of avoiding the increase of the occupied area of equipment as much as possible, further improving the sludge concentration capability of the MBR system is a problem expected to be solved in the technical field.
Disclosure of utility model
The utility model aims to overcome the defects of the prior art and provide an improved offline cleaning system of an MBR (Membrane bioreactor) membrane module device, which can enhance the concentration effect of residual sludge.
The utility model aims to modify an offline cleaning system of an MBR membrane module device, so that the offline cleaning system can be used for concentrating, reducing the volume and even primarily digesting the residual sludge in an idle stage on the basis of keeping the offline soaking function of the original membrane module device, so that the residual sludge is primarily concentrated before entering a gravity concentration tank, then the residual sludge is further concentrated and ensured to be homogenized in the concentration tank, the stability of the residual sludge in terms of solid content, characteristics and the like before dehydration after entering a dehydration device is ensured as much as possible, the normal operation of the sludge dehydration device is ensured, and the sludge dehydration cost is saved.
Based on the above, the utility model provides an improved system for enhancing the concentration of residual sludge by using an MBR membrane module device offline washing tank, the system comprises an MBR membrane tank 100, a water distribution channel 102, an offline washing membrane tank and a gravity concentration tank, wherein the MBR membrane tank 100 is provided with the membrane module device 101, wherein one corner of the lower part of the pickling tank 4 is provided with a residual sludge inlet arc-shaped channel 41, the residual sludge inlet arc-shaped channel 41 is positioned close to a residual sludge pipeline, and a residual sludge branch circuit is arranged at the downstream of a residual sludge pump 5 and is connected to the bottom of the residual sludge inlet arc-shaped channel 41; a surplus sludge water collecting port 21 is arranged at the lower part of the alkaline washing tank 2 and is connected to the upstream of the surplus sludge pump 5 through a water collecting pipeline; the upper part of the pickling tank 4 is provided with a pickling tank water outlet pipeline connected to the upper part of the clean water tank 3, and the upper part of the clean water tank 3 is provided with a clean water tank water outlet pipeline connected to the upper part of the alkaline washing tank 2.
In the present utility model, the MBR membrane tank 100 is typically constructed adjacent to an off-line membrane washing tank.
According to a preferred embodiment, the excess sludge branch has a excess sludge branch valve.
According to a preferred embodiment, the water collecting line has a water collecting line valve, for example a solenoid valve. Through reasonable setting of the valve, the remote control of each pipeline can be realized to control the distribution proportion of reforming region and membrane pond surplus sludge entering the gravity concentration pond.
According to a preferred embodiment, the height of the water outlet line of the pickling tank is lower than the height of the overflow opening of the pickling tank; the height of the clean water tank water outlet pipeline is lower than the height of the clean water tank overflow port.
According to a preferred embodiment, the bottom of the alkaline washing tank 2 is a bevel, preferably inclined towards the location of the water collection outlet, i.e. the water collection outlet is at the lower part of the bevel.
These arrangements facilitate the sludge first entering the lower end of the sludge zone and then ascending upward, thereby increasing the excess sludge residence time.
The utility model improves the conventional offline cleaning pool of the MBR membrane module, adds the residual sludge branch and the water collecting pipeline and the corresponding valves on the pipelines on the basis of the original residual sludge system, fully utilizes the idle stage of the MBR membrane cleaning pool to concentrate sludge, enlarges the residual sludge concentration residence time, realizes the stable homogenization of residual sludge in the gravity concentration pool, and finally realizes the saving, high efficiency and stability of sludge dehydration. The system is simple and feasible, saves equipment investment and operation cost, has high economic benefit and is worthy of wide popularization.
Drawings
FIG. 1 is a schematic diagram of an off-line cleaning system according to the present utility model, in top view;
Wherein, 1, a gravity concentration tank; 2. an alkaline washing pool; 3. a clean water tank; 4. a pickling tank; 5. a residual sludge valve;
100. An MBR membrane pool; 101. a membrane group device; 102. and a water distribution channel.
Detailed Description
The following examples serve to illustrate the technical solution of the utility model without limiting it.
Example 1
A 2 O+MBR technology is adopted in a water plant. The residual sludge system comprises an MBR membrane tank 100, a water distribution channel 102 and a gravity concentration tank, wherein a membrane group device 101 is arranged in the MBR membrane tank 100, sludge mixed liquor in the MBR membrane tank 100 and the water distribution channel 102 thereof is connected with the gravity concentration tank 1 through a residual sludge pipeline, and a residual sludge pump 5 is arranged on the residual sludge pipeline. The off-line membrane washing tank comprises an alkaline washing tank 2, a clean water tank 3 and a pickling tank 4, wherein overflow ports are formed in the upper parts of the alkaline washing tank 2, the clean water tank 3 and the pickling tank 4 and are connected into a water distribution channel 102.
And (3) designing the residual sludge to be conveyed into a gravity concentration tank 1 by an MBR membrane tank and a water distribution channel thereof through a residual sludge pump, wherein the retention time is about 3 hours, the solid content reaches 20% after the residual sludge is dehydrated through a belt type dehydrator, and the obtained sludge is subjected to external treatment. However, in the actual operation process, the gravity concentration tank has poor concentration effect on the residual sludge and the sludge cannot be stably homogenized, so that the flocculating agent dosage used when the belt dehydrator dehydrates the sludge is increased, the thickness of a mud cake is different, the water content cannot be stably up to 80% or below, and great trouble is caused to the production operation of a sewage plant. The plant has attempted to add a centrifugal dehydrator to keep the water content of the sludge substantially below 80%, but the water content is unstable and the flocculant is used in a large amount.
The plant adopts the double series operation, the design treatment capacity is 5 ten thousand tons/day, and the actual daily average treatment capacity is about 4.0 ten thousand tons/day. Under the normal operation condition, a belt dehydrator is used, the water content of the sludge is 82-86%, and the use amount of flocculant PAM is 10-15 kg/t.ds; if a centrifugal dehydrator is used, the water content of the sludge is 73-80%, and the use amount of the flocculant PAM is 8-12 kg/t.ds.
To provide the sludge concentrating capability of the system, the off-line membrane wash tank section is modified, as shown in fig. 1, to include:
An excess sludge inflow arc-shaped channel is arranged at one corner of a pipeline near the excess sludge downstream of the pickling tank 4, and an excess sludge branch is arranged at the downstream of the excess sludge pump 5 and is connected to the bottom of the excess sludge inflow arc-shaped channel; the lower part of the alkaline washing tank 2 is provided with a surplus sludge water collecting port which is connected to the upstream of a surplus sludge pump 5 through a water collecting pipeline, and each pipeline is provided with a corresponding valve.
The upper part of the pickling tank 4 is provided with a pickling tank water outlet pipeline connected to the upper part of the clean water tank 3, and the upper part of the clean water tank 3 is provided with a clean water tank water outlet pipeline connected to the upper part of the alkaline washing tank 2. The pipeline is higher than the height which is lower than the overflow port of the tank body.
The bottom of the alkaline washing tank 2 is transformed into an inclined plane which is inclined to the position of the water collecting water outlet 21, so that the sludge is conveniently discharged.
Through the improvement, except that normal operation is executed when the membrane group device is cleaned offline, the alkaline washing tank 2, the clean water tank 3 and the acid washing tank 4 can realize sludge concentration in other idle time, and part of sludge in the gravity tank is sent to the biological tank for sludge concentration, so that the cleaning process of the membrane group device is not influenced by the operation, and the original residual sludge system can still normally run when the membrane group device is cleaned.
Through reasonable setting of the electromagnetic valve, remote control of each pipeline can be realized, so that the biological pond is reasonably distributed with the surplus sludge in an idle period.
The improvement effectively utilizes the conventional facilities of the original water plant, effectively realizes saving, ensures the effect and fully considers economy, practicability and beauty.
After the offline cleaning pool of the MBR membrane module device is reformed, a belt dehydrator is used, the water content of the sludge is stabilized at 79-82%, and the using amount of a flocculating agent (PAM) is 8-12 kg/t.ds; the centrifugal dehydrator is used, the water content of the sludge is 76-79%, and the use amount of flocculant (PAM) is 6-9 kg/t.ds, which is obviously better than that before transformation. The modified MBR membrane module offline cleaning system saves about 10 ten thousand yuan annual cost, and has outstanding economic benefit.
Claims (8)
1. An improved system for enhancing residual sludge concentration by using an MBR membrane module device in an offline washing tank comprises an MBR membrane tank (100), a distribution channel (102), an offline washing membrane tank and a gravity concentration tank, wherein the MBR membrane module device (101) is arranged in the MBR membrane tank (100), the offline washing membrane tank comprises an alkaline washing tank (2), a clean water tank (3) and a pickling tank (4), sludge mixed liquor in the MBR membrane tank (100) and the distribution channel (102) thereof is connected with the gravity concentration tank (1) through a residual sludge pipeline, a residual sludge pump (5) is arranged on the residual sludge pipeline, overflow ports are arranged on the upper parts of the alkaline washing tank (2), the clean water tank (3) and the pickling tank (4) and are respectively connected with the distribution channel (102), and the system is characterized in that a residual sludge inlet arc-shaped channel (41) is arranged at one corner of the lower part of the pickling tank (4), the residual sludge inlet arc-shaped channel (41) is positioned close to the residual sludge pipeline, and residual sludge is arranged at the bottom of the residual sludge branch water inlet arc-shaped channel (41); a surplus sludge water collecting port (21) is arranged at the lower part of the alkaline washing tank (2) and is connected to the upstream of a surplus sludge pump (5) through a water collecting pipeline; the upper part of the pickling tank (4) is provided with a pickling tank water outlet pipeline which is connected to the upper part of the clean water tank (3), and the upper part of the clean water tank (3) is provided with a clean water tank water outlet pipeline which is connected to the upper part of the alkaline washing tank (2).
2. The improved system for enhancing excess sludge concentration using an offline membrane module reactor as claimed in claim 1, wherein the MBR membrane module (100) is adjacent to the offline membrane module reactor.
3. The improved system for enhancing excess sludge concentration utilizing an offline lagoon of an MBR membrane module as recited in claim 1, wherein said excess sludge leg has an excess sludge leg valve.
4. The improved system for enhancing excess sludge concentration utilizing an offline MBR membrane module as recited in claim 1, wherein the water collection line has a water collection line valve.
5. The improved system for enhancing the concentration of the excess sludge by using the offline washing tank of the MBR membrane module device as recited in claim 1, wherein the upper end of the arc-shaped channel of the excess sludge inlet is lower than the overflow port of the washing tank (4).
6. The improved system for enhancing the concentration of excess sludge by utilizing the offline washing tank of the MBR membrane module device as recited in claim 1, wherein the height of the water outlet pipeline of the washing tank is lower than the height of the overflow port of the washing tank (4).
7. The improved system for enhancing the concentration of the excess sludge by utilizing the offline pool washing of the MBR membrane module device as claimed in claim 1 is characterized in that the height of a water outlet pipeline of the clean water tank (3) is lower than the height of an overflow port of the clean water tank (3).
8. The improved system for enhancing the concentration of the residual sludge by utilizing the offline washing tank of the MBR membrane module device as claimed in claim 1 is characterized in that the tank bottom of the alkaline washing tank (2) is an inclined plane, and the water collecting port is positioned at the lower part of the inclined plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322592758.6U CN220845732U (en) | 2023-09-22 | 2023-09-22 | Improved system for enhancing concentration of residual sludge by offline washing pool of MBR (Membrane biological reactor) membrane module device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322592758.6U CN220845732U (en) | 2023-09-22 | 2023-09-22 | Improved system for enhancing concentration of residual sludge by offline washing pool of MBR (Membrane biological reactor) membrane module device |
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| Publication Number | Publication Date |
|---|---|
| CN220845732U true CN220845732U (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322592758.6U Active CN220845732U (en) | 2023-09-22 | 2023-09-22 | Improved system for enhancing concentration of residual sludge by offline washing pool of MBR (Membrane biological reactor) membrane module device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220845732U (en) |
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2023
- 2023-09-22 CN CN202322592758.6U patent/CN220845732U/en active Active
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