CN204079713U - A kind of sewage disposal additional carbon cascade controller - Google Patents
A kind of sewage disposal additional carbon cascade controller Download PDFInfo
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- CN204079713U CN204079713U CN201420557184.7U CN201420557184U CN204079713U CN 204079713 U CN204079713 U CN 204079713U CN 201420557184 U CN201420557184 U CN 201420557184U CN 204079713 U CN204079713 U CN 204079713U
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Abstract
The utility model discloses a kind of sewage disposal additional carbon cascade controller, waste disposal plant is made up of the anaerobic pond connected, anoxic pond, 1# Aerobic Pond, 2# Aerobic Pond, 3# Aerobic Pond and settling tank, described main PI controller connects water outlet nitrate survey meter and 3# Aerobic Pond nitrate survey meter, and described main PI controller is connected by nitrate set value calculation line with secondary PI controller.Apply main PI controller and control water outlet the concentration of nitrate nitrogen, apply secondary PI controller and overcome external disturbance fast, form cascade control strategy method.This cascade control strategy method can rapidly according to the throwing amount of the set(ting)value determination additional carbon of influent load and water outlet the concentration of nitrate nitrogen, there is good dynamic characteristics, capacity of resisting impact load is strong, can greatly reduce system water outlet nitrate nitrogen and total nitrogen concentration, significantly improve the operating load of Sewage Plant.
Description
Technical field
The present invention relates to a kind of sewage disposal additional carbon cascade controller, belong to environmental technology field.
Background technology
Current sewage disposal technology basic forming, but the eutrophication of the water body that nitrogen phosphorus excessive emissions causes, it is still the significant problem that water pollutions exists, sewage disposal is no longer only for the purpose of organics removal (COD etc.), but should organics removal denitrogenation dephosphorizing again, reduce body eutrophication, traditional Biological Nitrogen Removal Processe, comprise A/0, technique such as improvement AA/0, oxidation ditch etc.Nitrogen Removal Mechanism is mainly through aminating reaction, nitration reaction and anti-nitration reaction, and under anoxic conditions, reduction nitrate, discharges molecular nitrogen (N to denitrifying bacterium
2) or nitrous oxide (N
2o) process, many bacteriums, actinomycetes and mould can utilize nitrate as nitrogen nutrition, utilize nitrite anions and nitrate radical to be respiratory final electron acceptor(EA), need carbon source in sewage to be electron donor, nitrate reductase is become nitrogen (N
2), be called denitrification or denitrogenation.Because Sewage Plant influent load is all the time all in change, water inlet carbon-nitrogen ratio has the time difference several times, is suppressed cannot carries out if lack carbon source denitrification.Existing sewage disposal technology does not also add the Controlling System of carbon source, cannot realize denitrifying control, and carbon source adds the excessive system cloud gray model expense that will cause to be increased.Therefore in sewage treatment process, need the amount controlling carbon source, set up and automatically control microsystem, realize the automatic control to additional carbon, reduce operation of sewage disposal system expense, reduce external disturbance and ensure system stable operation.
Summary of the invention
The object of the invention is to the shortcoming and defect overcoming above-mentioned prior art, a kind of sewage disposal additional carbon cascade controller is provided, realize adding in right amount and realizing automatic serials control carbon source, reduce system cloud gray model expense, reduce external disturbance and ensure system stable operation.
Object of the present invention is achieved through the following technical solutions: a kind of sewage disposal additional carbon cascade controller, waste disposal plant is by the anaerobic pond connected successively, anoxic pond, 1# Aerobic Pond, 2# Aerobic Pond, 3# Aerobic Pond and settling tank composition, described main PI controller connects water outlet nitrate survey meter and 3# Aerobic Pond nitrate survey meter, described main PI controller is connected by nitrate set value calculation line with secondary PI controller, apply main PI controller and control water outlet the concentration of nitrate nitrogen, apply secondary PI controller and overcome external disturbance fast, form cascade control strategy method.
Described anaerobic pond is provided with external carbon addition device, and external carbon addition device is connected by adding control line with secondary PI controller.
Described secondary PI controller connects anoxic pond nitrate survey meter.
The water outlet of described 3# Aerobic Pond connects anaerobic pond and anoxic pond respectively by inner circulating tube.
The shore pipe of described settling tank connects mud return line and excess sludge pipe, and mud return line connects water inlet pipe.
Principle of work of the present invention: intaking enters anaerobic pond successively by water inlet pipe, anoxic pond, 1# Aerobic Pond, 2# Aerobic Pond, 3# Aerobic Pond, Aerobic Pond adopts blast aeration, by being filled with air in aeration tank, each aeration tank is filled with air capacity difference, reduce energy consumption, the concurrent raw nitration reaction of degradation of contaminant under microbial process, the water outlet of 3# Aerobic Pond connects anaerobic pond and anoxic pond respectively by inner circulating tube, by part mixed-liquor return to anaerobic pond and anoxic pond, a clarifier sludge part is back to anaerobic pond feed-water end by mud return line, reach counter and digest denitrogenation.
Using the difference of the observed value of 3# Aerobic Pond nitrate survey meter and water outlet nitrate survey meter as the input of main PI controller, using the anoxic pond nitrate set(ting)value determined as the output of main PI controller, composition tandem master loop.Simultaneously using the difference of the measured value of the output of master loop and anoxic pond nitrate survey meter as the input of secondary PI controller, using the throwing amount of carbon source as output, form subloop.
In sum, the invention has the beneficial effects as follows: PI controller principle is simple, be easy to realize, this cascade control strategy method can rapidly according to the throwing amount of the set(ting)value determination additional carbon of influent load and water outlet the concentration of nitrate nitrogen, there is good dynamic characteristics, capacity of resisting impact load is strong, only need two nitrate nitrogen on-line sensors can set up additional carbon cascade control method in Sewage Plant, can greatly reduce system water outlet nitrate nitrogen and total nitrogen concentration, significantly improve the operating load of Sewage Plant.
Accompanying drawing explanation
A kind of sewage disposal additional carbon of Fig. 1 cascade controller process schematic representation.
The title marked in accompanying drawing: 1-water inlet; 2-water inlet pipe; 3-anaerobic pond; 4-anoxic pond; 5-1# Aerobic Pond; 6-2# Aerobic Pond; 7-3# Aerobic Pond; 8-settling tank; 9-water outlet; 10-aerating apparatus; 11-inner circulating tube; 12-mud return line; 13-excess sludge pipe; 14-external carbon addition device; 15-secondary PI controller; 16-main PI controller; 17-anoxic pond nitrate survey meter; 18-add control line; 19-nitrate set value calculation line; 20-3# Aerobic Pond nitrate survey meter; 21-water outlet nitrate survey meter.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
A kind of sewage disposal additional carbon cascade controller, waste disposal plant is made up of the anaerobic pond 3 connected successively, anoxic pond 4,1# Aerobic Pond 5,2# Aerobic Pond 6,3# Aerobic Pond 7 and settling tank 8, described main PI controller 16 connects water outlet nitrate survey meter 21 and 3# Aerobic Pond nitrate survey meter 20, described main PI controller 16 is connected by nitrate set value calculation line 19 with secondary PI controller 15, apply main PI controller 16 and control water outlet the concentration of nitrate nitrogen, apply secondary PI controller 15 and overcome external disturbance fast, form cascade control strategy method.
Described anaerobic pond 3 is provided with external carbon addition device 14, and external carbon addition device 14 is connected by adding control line 18 with secondary PI controller 15.
Described secondary PI controller 15 connects anoxic pond nitrate survey meter 17.
The water outlet of described 3# Aerobic Pond 7 connects anaerobic pond 3 and anoxic pond 4 respectively by inner circulating tube 11.
The shore pipe of described settling tank 8 connects mud return line 12 and excess sludge pipe 13, and mud return line 12 connects water inlet pipe 2.
During this plant running: water inlet 1 enters anaerobic pond 3 successively by water inlet pipe 2, anoxic pond 4, 1# Aerobic Pond 5, 2# Aerobic Pond 6, 3# Aerobic Pond 7, Aerobic Pond adopts blast aeration, by being filled with air in aeration tank, each aeration tank is filled with air capacity difference, reduce energy consumption, the concurrent raw nitration reaction of degradation of contaminant under microbial process, 3# Aerobic Pond 7 water outlet connects anaerobic pond 3 and anoxic pond 4 respectively by inner circulating tube 11, by part mixed-liquor return to anaerobic pond 3 and anoxic pond 4, a settling tank 8 mud part is back to anaerobic pond 3 feed-water end by mud return line 12, reach counter and digest denitrogenation.
Using the difference of 3# Aerobic Pond nitrate survey meter 20 and the observed value of water outlet nitrate survey meter 21 as the input of main PI controller 16, using the anoxic pond nitrate set(ting)value determined as the output of main PI controller 16, composition tandem master loop.Simultaneously using the difference of the measured value of the output of master loop and anoxic pond nitrate survey meter 17 as the input of secondary PI controller 15, using the throwing amount of carbon source as output, form subloop.
Experimentally prove: after adopting this sewage disposal additional carbon cascade controller, when water inlet total nitrogen changes between 30mg/L to 85mg/L, water outlet the concentration of nitrate nitrogen can be made to maintain about the set(ting)value 7mg/L of system.PI controller principle is simple, be easy to realize, and this cascade control strategy method can rapidly according to the throwing amount of the set(ting)value determination additional carbon of influent load and water outlet the concentration of nitrate nitrogen, and have good dynamic characteristics, capacity of resisting impact load is strong.
As mentioned above, just the present invention can be realized preferably.
Claims (3)
1. a sewage disposal additional carbon cascade controller, is characterized in that: waste disposal plant is made up of the anaerobic pond connected successively (3), anoxic pond (4), 1# Aerobic Pond (5), 2# Aerobic Pond (6), 3# Aerobic Pond (7) and settling tank (8); Described main PI controller (16) connects water outlet nitrate survey meter (21) and 3# Aerobic Pond nitrate survey meter (20); Described main PI controller (16) is connected by nitrate set value calculation line (19) with secondary PI controller (15); Described anaerobic pond (3) is provided with external carbon addition device (14), and external carbon addition device (14) is connected by adding control line (18) with secondary PI controller (15); Described secondary PI controller (15) connects anoxic pond nitrate survey meter (17).
2. a kind of sewage disposal additional carbon cascade controller as claimed in claim 1, is characterized in that: the water outlet of described 3# Aerobic Pond (7) connects anaerobic pond (3) and anoxic pond (4) respectively by inner circulating tube (11).
3. a kind of sewage disposal additional carbon cascade controller as claimed in claim 1, is characterized in that: the shore pipe of described settling tank (8) connects mud return line (12) and excess sludge pipe (13), and mud return line (12) connects water inlet pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420557184.7U CN204079713U (en) | 2014-09-26 | 2014-09-26 | A kind of sewage disposal additional carbon cascade controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420557184.7U CN204079713U (en) | 2014-09-26 | 2014-09-26 | A kind of sewage disposal additional carbon cascade controller |
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| Publication Number | Publication Date |
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| CN204079713U true CN204079713U (en) | 2015-01-07 |
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| CN201420557184.7U Expired - Fee Related CN204079713U (en) | 2014-09-26 | 2014-09-26 | A kind of sewage disposal additional carbon cascade controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104211266A (en) * | 2014-09-26 | 2014-12-17 | 成都绿源新创环保科技有限公司 | Wastewater treatment additional carbon resource cascade control device |
-
2014
- 2014-09-26 CN CN201420557184.7U patent/CN204079713U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104211266A (en) * | 2014-09-26 | 2014-12-17 | 成都绿源新创环保科技有限公司 | Wastewater treatment additional carbon resource cascade control device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING GOLDEN FIRST MORNING SUN ENVIRONMENTAL PRO Free format text: FORMER OWNER: CHENGDU LYUYUAN XINCHUANG ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. Effective date: 20150417 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zheng Jishun Inventor before: Zhong Chunhong Inventor before: Zheng Hengli |
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| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 610000 CHENGDU, SICHUAN PROVINCE TO: 101500 MIYUN, BEIJING Free format text: CORRECT: INVENTOR; FROM: ZHONG CHUNHONG ZHENG HENGLI TO: ZHENG JISHUN |
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| TR01 | Transfer of patent right |
Effective date of registration: 20150417 Address after: 101500 Beijing city Miyun mujiayu town of Sha Yu Village North Patentee after: Beijing Golden Dawn Environmental Technology Development Co.,Ltd. Address before: A Street South Chengdu Dayuan high tech Zone of Sichuan province 610000 City 1 floor No. 50 Patentee before: CHENGDU LYUYUAN XINCHUANG ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20210926 |