CN204097287U - Sewage work's chemical dephosphorization automatic control device - Google Patents

Sewage work's chemical dephosphorization automatic control device Download PDF

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Publication number
CN204097287U
CN204097287U CN201420528611.9U CN201420528611U CN204097287U CN 204097287 U CN204097287 U CN 204097287U CN 201420528611 U CN201420528611 U CN 201420528611U CN 204097287 U CN204097287 U CN 204097287U
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China
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online
pond
under meter
water inlet
inlet pipe
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CN201420528611.9U
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Chinese (zh)
Inventor
王佳伟
刘伟岩
董洋
崔春玥
刘磊
常江
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Beijing Drainage Group Co Ltd
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Beijing Drainage Group Co Ltd
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Abstract

The utility model discloses a kind of sewage work chemical dephosphorization automatic control device, described device is provided with the preliminary sedimentation tank, biological reaction tank and the second pond that are sequentially communicated with, the water inlet pipe of second pond is communicated with drug feeding pipeline with dosing pump, medicine storing pot, and is provided with online under meter, medicament under meter, online PLC and frequency transformer, online phosphate determination instrument and controller; Described control device has good phosphor-removing effect, and efficiency is high, and level of automation is very high.The utility model is specially adapted to sewage work's chemical dephosphorization technique, achieves extraordinary effect in trial run.

Description

Sewage work's chemical dephosphorization automatic control device
Technical field
The utility model belongs to a kind of sewage disposal technology, a kind of sewage chemical dephosphorization processing controls technology, particularly automatically adjusts the dosage of chemical dephosphorization medicament according to amount of inlet water and Inlet and outlet water phosphorus concentration in time, makes the better device of dephosphorization treatment effect of sewage.
Background technology
At home a lot of sewage work mostly all adopts biological phosphate-eliminating be lead, chemical dephosphorization is the auxiliary method phosphorus removing method as sewage disposal.Traditional chemical dephosphorization adds Dephosphorization reagent at aeration tank end usually, and its addition method comprises: constant basis adds, add according to the feed forward control of influent load, according to methods such as the phosphorus concentration feedback control of dispensing point add.Because sewage treatment plant inflow phosphorus load exists larger seasonality and day-night change, adopt these methods large some problems of existence in actual moving process: 1, constant basis adds and can not promptly and accurately react to the change of influent load, can not make adjustment in time to dosage, often must improve dosage with adaptive peak load, make the medicament utilization ratio of chemical dephosphorization low, add resource consumption, improve processing cost; 2, the undue instrument that relies on causes system cloud gray model unreliable: add according to the feed forward control of influent load and add according to the feedback control of dispensing point phosphorus concentration the Real-Time Monitoring all placed one's entire reliance upon into water phosphorus concentration or toss area phosphorus concentration, and phosphorus on-line monitoring instrument cost of investment is high, maintenance requirement is high, due to containing pollution substances such as a large amount of mud in the water inlet of phosphorus concentration monitoring point and aeration tank end water sample, the maintenance of phosphorus in-line meter is caused significantly to increase, sewage work is often difficult to timely maintenance, and chemical phosphorus removal system can not normally be run.Based on above case study, need to improve the chemical dephosphorization Controlling System of existing sewage disposal, make the dosage of Dephosphorization reagent obtain accurate, timely and stable control.
Utility model content
The purpose of this utility model is to solve the problems of the technologies described above, and provides a kind of sewage work chemical dephosphorization automatic control device.This control device is the dosage automatically adjusting chemical dephosphorization medicament according to amount of inlet water and Inlet and outlet water phosphorus concentration in time, can ensure that the added amount of chemical of sewage chemical dephosphorization processing unit obtains accurately controlling timely, and run with making chemical dephosphorization treatment process stability and high efficiency.
The purpose of this utility model is realized by following technical proposals: sewage work's chemical dephosphorization automatic control device, be provided with the preliminary sedimentation tank be sequentially communicated with, biological reaction tank and second pond, preliminary sedimentation tank is provided with water inlet pipe, second pond is provided with water inlet pipe and water shoot, the water inlet pipe of second pond and dosing pump, medicine storing pot is communicated with drug feeding pipeline, it is characterized in that: on the water inlet pipe of preliminary sedimentation tank, online under meter is housed, the drug feeding pipeline that dosing pump is communicated with second pond is equipped with medicament under meter, described dosing pump is equipped with the online PLC and frequency transformer that control its flow, the drainage pipeline of second pond is equipped with online phosphate determination instrument, be provided with controller in addition, this controller and described online under meter and online PLC and frequency transformer, medicament under meter, online phosphate determination instrument carries out signal and control linkage.
The reliable feed water flow gauge of cardinal principle utility of this device mainly inputs as this Controlling System, the reliable frequency transformer of utility is as the main actuator unit of this Controlling System, then influent concentration is utilized to there is regular change, and the change of biological respinse cell system to water inlet phosphorus load possesses certain shock absorption, water inlet phosphorus concentration control array is regularly automatically adjusted in conjunction with the biological reaction tank water inlet phosphorus concentration data measured by hand and the online phosphorus concentration data of secondary clarifier effluent, the parameter preset of dosing pump frequency transformer is regularly automatically adjusted according to dosing flow online data.
The beneficial effects of the utility model: adopt this device to carry out chemical dephosphorization and automatically control, city domestic sewage water outlet phosphorus concentration stability contorting is at below 1mg/l, thus ensureing the stably reaching standard of water outlet phosphorus, trivalent metal salt and chemical agent remove the mol ratio stability contorting of phosphorus at below 1.5mol/mol.Due to the online concentration of phosphorus be positioned over biological reaction tank after comparatively clean two to settle out water place, be positioned over biological reaction tank before with among compare, the online maintenance workload of phosphorus have dropped more than 50%.Even if this Controlling System when two settle out water phosphorus concentration on-line computing model and these two reliabilities of dosing under meter lower instrument deficient, rely on feed water flow gauge, frequency transformer, dosing pump and controller still can realize comparatively reliably controlling, system stability is significantly improved.Therefore, the utility model has reliable and stable, regulates in time, safeguards simple feature, and have good regulating effect.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Embodiment: sewage work's chemical dephosphorization automatic control device, be provided with the preliminary sedimentation tank 3 be sequentially communicated with, biological reaction tank 4 and second pond 5, preliminary sedimentation tank is provided with water inlet pipe, second pond is provided with water inlet pipe and water shoot, the water inlet pipe of second pond and dosing pump 8, medicine storing pot 7 is communicated with drug feeding pipeline, the water inlet pipe of preliminary sedimentation tank is equipped with online under meter 2, the drug feeding pipeline that dosing pump is communicated with second pond is equipped with medicament under meter 9, described dosing pump is equipped with the online PLC and frequency transformer 6 that control its flow, the drainage pipeline of second pond is equipped with online phosphate determination instrument 10, be provided with controller 1 in addition, this controller and described online under meter and online PLC and frequency transformer, medicament under meter, online phosphate determination instrument carries out signal and control linkage.
This example is very good through running three months effects, water outlet phosphorus concentration reduces 0.2mg/L, can stability contorting at 0.6 ± 0.1mg/l, trivalent metal salt and chemical agent remove the mol ratio stability contorting of phosphorus at 1.2mol/mol, and phosphorus is positioned over second pond drainage pipeline maintenance workload compared with being positioned in biological reaction tank online and, from reducing to monthly 1 time for 1 time weekly, monthly saves pharmaceutical quantities 180 tons, count more than 60,000 yuan, phosphorus on-line maintenance takes over thousands of yuan of saving two, and system stability significantly improves.

Claims (1)

1. sewage work's chemical dephosphorization automatic control device, be provided with the preliminary sedimentation tank (3) be sequentially communicated with, biological reaction tank (4) and second pond (5), preliminary sedimentation tank is provided with water inlet pipe, second pond is provided with water inlet pipe and water shoot, the water inlet pipe of second pond and dosing pump (8), medicine storing pot (7) is communicated with drug feeding pipeline, it is characterized in that: online under meter (2) is housed on the water inlet pipe of preliminary sedimentation tank, medicament under meter (9) drug feeding pipeline that dosing pump is communicated with second pond is equipped with, described dosing pump is equipped with the online PLC and frequency transformer (6) that control its flow, the drainage pipeline of second pond is equipped with online phosphate determination instrument (10), be provided with controller (1) in addition, this controller and described online under meter and online PLC and frequency transformer, medicament under meter, online phosphate determination instrument carries out signal and control linkage.
CN201420528611.9U 2014-09-11 2014-09-11 Sewage work's chemical dephosphorization automatic control device Active CN204097287U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420528611.9U CN204097287U (en) 2014-09-11 2014-09-11 Sewage work's chemical dephosphorization automatic control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420528611.9U CN204097287U (en) 2014-09-11 2014-09-11 Sewage work's chemical dephosphorization automatic control device

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CN204097287U true CN204097287U (en) 2015-01-14

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104355477A (en) * 2014-09-11 2015-02-18 北京城市排水集团有限责任公司 Chemical phosphorus removal automatic control device of sewage treatment plant and control method thereof
CN113979538A (en) * 2021-11-06 2022-01-28 北京工业大学 Device and method for chemically strengthening biological phosphorus removal
CN114084954A (en) * 2020-08-24 2022-02-25 辽宁省环保集团有限责任公司 External circulation denitrification bioreactor and application thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104355477A (en) * 2014-09-11 2015-02-18 北京城市排水集团有限责任公司 Chemical phosphorus removal automatic control device of sewage treatment plant and control method thereof
CN104355477B (en) * 2014-09-11 2016-08-17 北京城市排水集团有限责任公司 Sewage treatment plant's chemical dephosphorization automaton and control method
CN114084954A (en) * 2020-08-24 2022-02-25 辽宁省环保集团有限责任公司 External circulation denitrification bioreactor and application thereof
CN113979538A (en) * 2021-11-06 2022-01-28 北京工业大学 Device and method for chemically strengthening biological phosphorus removal
CN113979538B (en) * 2021-11-06 2023-09-26 北京工业大学 Device and method for chemically strengthening biological dephosphorization

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