CN111233120A - Defluorinating agent automatic reagent feeding system - Google Patents
Defluorinating agent automatic reagent feeding system Download PDFInfo
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- CN111233120A CN111233120A CN202010128235.4A CN202010128235A CN111233120A CN 111233120 A CN111233120 A CN 111233120A CN 202010128235 A CN202010128235 A CN 202010128235A CN 111233120 A CN111233120 A CN 111233120A
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- fluorine
- agent
- dosing
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- removal agent
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/583—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing fluoride or fluorine compounds
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention provides an automatic fluorine removing agent dosing system, which comprises: two on-line fluorine ion meters, which analyze the fluorine ion concentration before and after adding the liquid fluorine removal agent into the sewage; the flowmeter is used for measuring the water quantity of the fluorine-containing sewage; the fluorine removal agent storage tank is used for storing a fluorine removal agent and is connected with the variable-frequency dosing pump through a pipeline; a PLC controller receiving output signals of the on-line fluorine ion meter and the flow meter and outputting a control signal; the touch screen is used for displaying, setting and modifying parameters of the PLC; and the variable-frequency dosing pump is used for adjusting the dosing amount of the liquid defluorination medicament according to the control signal of the PLC. The automatic defluorinating agent dosing system can avoid defluorinating agent loss caused by inaccurate manual dosing, and can also save labor cost, ensure that the concentration of fluorine ions in effluent stably reaches the discharge standard, and generate good economic benefit for sewage treatment enterprises.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to an automatic fluorine removing agent dosing system for fluorine-containing sewage treatment.
Background
In the production process of industries such as semiconductors, glass industry, coking, coal chemical industry, metallurgy, phosphorus chemical industry and the like, sewage containing fluoride ions is often generated. Fluorine has strong affinity to calcium and phosphorus in human body, and can destroy normal metabolism of calcium and phosphorus in human body and inhibit the activity of certain enzymes, thereby triggering a series of actions including: dental fluorosis, kidney, liver and brain damage, immunologic dysfunction, pulmonary edema, pulmonary hemorrhage, children's intelligence decline, etc. In order to reduce the fluoride ions in the wastewater below the discharge standard, a liquid fluorine removal agent needs to be added. At present, the fluorine-containing sewage is intermittently discharged to a sewage treatment plant, and the condition of large fluctuation of the concentration of fluorine ions exists, so that the dosage of a fluorine-removing medicament is difficult to adjust timely and accurately. The dosage of the fluorine removal agent cannot be adjusted in time due to the change of fluorine ions in the water, so that the waste of the fluorine removal agent is caused. Meanwhile, the fluorine ions and the fluorine removal agent are used as a chemical process and can fully react in a certain time, so that the accuracy and the timeliness of adding the fluorine removal agent are seriously influenced, and time and labor are wasted and the effect is poor in the process of manually adding the fluorine removal agent.
Disclosure of Invention
The invention aims to provide an automatic dosing system for a fluorine removal agent, which aims to solve the problem of dosing waste caused by inaccurate manual dosing and ensure that the concentration of fluorine ions in effluent after a proper amount of fluorine removal agent is added into fluorine-containing sewage stably reaches the discharge standard.
The invention is realized by the following modes: an automatic fluorine-removing agent dosing system comprises two online fluorine ion meters, a flow meter, a PLC (programmable logic controller), a touch screen, a fluorine-removing agent storage tank and a variable-frequency dosing pump.
The online fluoride ion meter is used for analyzing the concentration of fluoride ions in sewage in real time, wherein the online fluoride ion meter ① is used for analyzing the concentration of fluoride ions in the inlet water of the fluorine-containing sewage, and the online fluoride ion meter ② is used for analyzing the concentration of fluoride ions in the treated sewage;
preferably, the online fluorine ion meter is an online fluorine ion meter manufactured by Lanser company.
The flowmeter is an electromagnetic flowmeter, is arranged at the rear end of the lift pump room and is used for metering the water inflow of the fluorine-containing sewage and feeding the water inflow back to the PLC control system.
The PLC is used for receiving digital output signals of the on-line fluorine ion meter and the flowmeter and automatically outputting signals to control the variable-frequency dosing pump through a built-in program.
Preferably, the PLC is a Micro800 control system or a MicroLogix control system produced by Rockwell AB company, so as to ensure the reliability and stability of the automatic dosing system.
The touch screen is used for displaying, setting and modifying parameters of the PLC;
preferably, the touch screen is a kunlun normal TPC7062 series or a TPC1061 series touch screen produced by shenzhen kunlun normal science and technology limited liability company, and MCGS embedded configuration software is built in the touch screen and is used for (1) establishing an equipment structural framework; (2) collecting, analyzing and outputting data of external equipment; (3) monitoring a user window of data change of the whole control system; (4) real-time databases collected by on-line fluorine ion meters and flow meters, etc.; (5) and starting, circulating, exiting and other operation strategies.
The frequency conversion dosing pump consists of a frequency converter and an air diaphragm pump, has an automatic flow regulation function, and adjusts the dosing amount of the liquid defluorination medicament through a control signal of the PLC.
The defluorinating agent storage tank is made of glass fiber reinforced plastics or steel lining plastics and has an acid and alkali resistant function, is used for storing liquid defluorinating agent or defluorinating agent, and is connected with the variable-frequency dosing pump through a pipeline.
The automatic dosing system of the defluorinating agent can achieve that the treated sewage reaches the discharge standard by realizing the minimum dosing amount through the following processes that the dosing amount of the defluorinating agent (Q1) is directly related to the water amount of the fluorine-containing sewage (Q2), the concentration of fluorine ions in the fluorine-containing sewage (F0) and the concentration of fluorine ions in the actual discharged water (F1).
The PLC controller realizes the accurate feeding of the defluorinating agent through the following steps. According to the difference (delta F is F0-F1) between the inlet water amount (Q2) of the fluorine-containing wastewater, the raw water fluorine ion concentration (F0) and the outlet water online fluorine ion concentration actual value (F1), the required dosage of the fluorine-containing wastewater is determined, a dosage addition coefficient H1 is set, the coefficient is combined with the sewage flow rate (Q2) and the raw water fluorine ion concentration (F0), and the dosage of the chemicals is given out by a control system, so that the dosage is automatically changed according to the sewage flow rate.
The method comprises the steps of setting a stable value of the online effluent quality of fluoride ions (F2) according to the effluent quality standard, wherein the stable value can meet the requirement of reducing waste of fluorine removal agents and simultaneously avoid the water quality standard exceeding, namely the set value of the optimal effluent fluoride ion concentration, measuring an actual value of the online fluoride ion concentration of the effluent (F1) according to an online fluoride ion meter ②, setting a maximum allowable fluoride ion emission value (F2) according to relevant emission standards, and setting a correction coefficient H2 (an actual detection value/set value, F1/F2).
Both the flow feedback of the fluorine-containing wastewater and the on-line value feedback of the on-line fluorine ion meter have certain fluctuation and hysteresis, so that the fluorine ion concentration index of the effluent is easily low or high, and a correction coefficient H3 (empirical value/theoretical value) is set. Therefore, the fluorine removal agent dosing amount (Q1) in the automatic dosing control system may be expressed as Q1 ═ Q2 × (F0-F1) × H1 × H2 × H3.
The setting range of the dosing quantity dosing coefficient H1 parameter is 0.0001-0.005, and preferably, the setting range of the H1 parameter is 0.0002-0.003;
the parameter setting range of the correction coefficient H2 is 0.6-2, and preferably, the parameter setting range of H2 is 0.8-1.5;
the parameter setting range of the correction coefficient H3 is 0.5-2, and preferably, the parameter setting range of H3 is 0.75-1.25; the invention has the beneficial effects that:
1. according to the automatic fluorine-removing agent dosing system, the fluorine ion concentration in raw water and a filter tank is monitored in real time on line, and the flow of the fluorine-removing agent dosing pump is controlled according to the water inlet flow, the fluorine ion concentration in inlet and outlet water and the like, so that the fluorine-removing agent is accurately dosed, the waste of the agent caused by inaccurate fluorine-removing agent dosing due to manual operation is avoided, and the running treatment cost of fluorine-containing wastewater is saved.
2. The invention adopts the PLC control system, has high automation degree, can automatically add the fluorine removal agent according to the online fluorine ion concentration and water inflow of the fluorine-containing wastewater, solves the problems caused by the large fluctuation of the fluorine ion concentration of the fluorine removal agent and the water inflow to the greatest extent, ensures that a sewage treatment system is more stable, and effectively ensures that the fluorine-containing wastewater can reach the standard stably after being treated; meanwhile, the system can run continuously for 24 hours, unattended operation is achieved, and the labor cost of running of sewage enterprises is saved.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention.
FIG. 1 is a schematic diagram of an automatic dosing system for a fluorine removal agent, which comprises an online fluorine ion meter ①, an online fluorine ion meter ②, a flow meter, a PLC, a touch screen, a fluorine removal agent storage tank and a variable-frequency dosing pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example (1)
As shown in figure 1, the automatic fluorine removal agent dosing system comprises an online fluorine ion meter ①, an online fluorine ion meter ②, a flow meter, a PLC system, a touch screen, a variable-frequency dosing pump and a fluorine removal agent storage tank, wherein the online fluorine ion meter can measure the concentration of fluorine ions in sewage in real time and transmit a measured fluorine ion concentration signal to a PLC controller, and the PLC controller can receive output signals of the online fluorine ion meter and the flow meter, execute logic operation and output a signal to the variable-frequency dosing pump to adjust the dosing amount of a fluorine removal agent.
In this embodiment, the defluorinating agent automatic dosing system is a closed-loop control system consisting of an online fluorine ion meter, a flow meter, a PLC (programmable logic controller) and a variable-frequency doser, and the reliability and stability of the control of the automatic dosing system are enhanced.
The automatic fluorine removing agent feeding system of the embodiment comprises the following components:
(1) the on-line fluorine ion meter is an LN-P high-precision on-line fluorine ion meter produced by Lanser company, the detection concentration is 0-20mg/L, and the resolution is 0.001 mg/L;
(2) the PLC is a MicroLogix 1400 programmable logic controller system produced by Rockwell AB company;
(3) the touch screen is a Kunlun normal TPC1061TX touch screen produced by Shenzhen Kunlun normal science and technology Limited liability company, and MCGS embedded configuration software is built in the touch screen;
(4) the flowmeter, the air diaphragm pump and the frequency converter are common commercial products;
(5) the volume of the defluorinating agent storage tank is 30m3The glass fiber reinforced plastic tank.
Example (2)
In a certain sewage plant in Henan, the water amount is 1-2 ten thousand square/day, the fluorine ion concentration is 5-15mg/L, the emission standard of the fluorine ions is 3.0mg/L, and before the automatic dosing system in the embodiment is not adopted, the liquid fluorine removal agent (type II) produced by Shenzhen Changlong science and technology Limited is adopted for fluorine removal, and the dosage of the fluorine removal agent is 6.7 tons/day. After the fluorine removal agent automatic dosing system of this embodiment is adopted to carry out fluorine removal agent dosing, the fluorine removal agent dosage is 5.5 tons/day, and the effluent fluorine ion concentration is stabilized between 2.80-2.95 mg/L. By adopting the automatic dosing system, 438 tons of defluorinating agents can be saved every year, and the cost of fluorine-containing wastewater treatment agents is saved by 18 percent. Therefore, the automatic fluorine-removing agent dosing system can reduce the usage amount of the fluorine-removing agent by optimizing parameters, avoid the loss of the fluorine-removing agent caused by inaccurate manual dosing, save labor cost, ensure that the concentration of fluorine ions in effluent stably reaches the discharge standard, and generate good economic benefit for sewage treatment enterprises.
Claims (8)
1. The utility model provides a defluorinating agent automatic reagent feeding system which characterized in that: the device comprises two online fluorine ion meters, a flowmeter, a fluorine removal agent storage tank, a PLC (programmable logic controller), a touch screen and a variable-frequency dosing pump, wherein the dosing amount of the liquid fluorine removal agent is adjusted according to a control signal of the PLC.
2. The on-line fluoride ion meter of claim 1, wherein the fluoride ion concentration of the wastewater before and after the addition of the liquid fluorine removal agent is analyzed.
3. The flowmeter of claim 1, wherein it is used for measuring the amount of fluorine-containing wastewater.
4. The fluorine-removing agent storage tank according to claim 1, wherein the tank is used for storing a fluorine-removing agent and is connected with a variable frequency dosing pump through a pipeline.
5. The PLC controller according to claim 1, wherein the control signal is output by an on-line fluoride ion meter and a flow meter and is calculated by an auto-dosing formula.
6. The touch screen of claim 1, used for display of PLC controllers, setting and modification of parameters.
7. The variable frequency dosing pump of claim 1 wherein the amount of liquid fluorine removal agent dosed is adjusted according to a control signal from the PLC controller.
8. The automatic dosing system of claim 1, wherein the dosage of the fluorine-removing agent is automatically adjusted by an optimization method of a PLC controller, so that the fluorine-removing agent is accurately dosed, waste of the fluorine-removing agent dosed manually is reduced, and labor cost of fluorine-containing wastewater treatment enterprises is saved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010128235.4A CN111233120A (en) | 2020-02-28 | 2020-02-28 | Defluorinating agent automatic reagent feeding system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010128235.4A CN111233120A (en) | 2020-02-28 | 2020-02-28 | Defluorinating agent automatic reagent feeding system |
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| CN111233120A true CN111233120A (en) | 2020-06-05 |
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| CN202010128235.4A Pending CN111233120A (en) | 2020-02-28 | 2020-02-28 | Defluorinating agent automatic reagent feeding system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118183906A (en) * | 2024-05-15 | 2024-06-14 | 杭州山屿源环保科技有限公司 | Intelligent dosing control method for wastewater defluorination |
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| CN105540801A (en) * | 2016-01-28 | 2016-05-04 | 上海华虹宏力半导体制造有限公司 | Fluoride-containing wastewater treatment system and method |
| CN107399794A (en) * | 2016-12-28 | 2017-11-28 | 宁波市自来水有限公司 | A kind of emergent automatic dosing control system of the water factory for tackling typhoon season heavy showers |
| CN206897364U (en) * | 2017-04-17 | 2018-01-19 | 天津特立环保科技有限公司 | A kind of fluoride waste calcium chloride automatic medicine adding apparatus |
| CN207596676U (en) * | 2017-11-28 | 2018-07-10 | 青岛城投娄山河水务有限公司 | A kind of automatic medicament feeding system |
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2020
- 2020-02-28 CN CN202010128235.4A patent/CN111233120A/en active Pending
Patent Citations (4)
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| CN105540801A (en) * | 2016-01-28 | 2016-05-04 | 上海华虹宏力半导体制造有限公司 | Fluoride-containing wastewater treatment system and method |
| CN107399794A (en) * | 2016-12-28 | 2017-11-28 | 宁波市自来水有限公司 | A kind of emergent automatic dosing control system of the water factory for tackling typhoon season heavy showers |
| CN206897364U (en) * | 2017-04-17 | 2018-01-19 | 天津特立环保科技有限公司 | A kind of fluoride waste calcium chloride automatic medicine adding apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118183906A (en) * | 2024-05-15 | 2024-06-14 | 杭州山屿源环保科技有限公司 | Intelligent dosing control method for wastewater defluorination |
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Application publication date: 20200605 |