CN218709754U - Accurate dosing system of sewage treatment dephosphorization agent - Google Patents
Accurate dosing system of sewage treatment dephosphorization agent Download PDFInfo
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- CN218709754U CN218709754U CN202222818836.5U CN202222818836U CN218709754U CN 218709754 U CN218709754 U CN 218709754U CN 202222818836 U CN202222818836 U CN 202222818836U CN 218709754 U CN218709754 U CN 218709754U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The utility model discloses a sewage treatment dephosphorizing agent accurate dosing system, which comprises a sewage treatment tank group, a dephosphorizing agent dosing assembly and an automatic control assembly; the sewage treatment tank group comprises a pretreatment tank connected with a water inlet pipe, and the pretreatment tank is sequentially communicated with a biochemical tank, a secondary sedimentation tank, a high-efficiency sedimentation tank, an active sand filter and an ultraviolet disinfection channel; the phosphorus removing agent feeding assembly comprises a phosphorus removing agent feeder which is arranged outside the high-efficiency sedimentation tank; a dosing pipe is arranged at the bottom of the side wall of the phosphorus removing agent dosing device, and the other end of the dosing pipe extends into the efficient sedimentation tank from the top of the efficient sedimentation tank; the dosing pipe is sequentially provided with a variable-frequency dosing pump and an electric ball valve from the dosing end to the medicine outlet end; the automatic control assembly comprises an intelligent control cabinet, a secondary sedimentation tank effluent TP online instrument and a sewage plant effluent TP online instrument; the utility model discloses under the stable up-to-standard prerequisite of guarantee sewage factory play water quality of water, realized energy-conservation and reduced the consumption and subtracted carbon, make sewage factory management step forward to the direction that becomes more meticulous.
Description
Technical Field
The utility model relates to a sewage treatment field, concretely relates to accurate charge system of sewage treatment dephosphorization agent.
Background
The sewage treated by the sewage treatment plant contains phosphorus with higher concentration, and is directly discharged into a water body, so that serious water body eutrophication is generated, and the water body is polluted. Phosphorus in wastewater can be removed by both chemical and biological methods. Biological phosphorus removal is a relatively economic phosphorus removal method, but as the existing biological phosphorus removal process cannot ensure that the total phosphorus of effluent stably meets the requirement of 0.5mg/L standard, a chemical phosphorus removal measure is added in an advanced treatment stage to further remove phosphorus.
In China, the water quality difference of domestic sewage is large in various regions, the water quality and the water inlet amount of the domestic sewage are different in different seasons and different time periods, and the phosphorus removing agent is basically added in a manual adding mode in a sewage treatment plant in China at present, so that the adding of the agent is difficult to control.
With the increasing environmental requirements, the simple dosing mode cannot meet the high-standard process management requirements. At present, upgrading and extension of urban sewage treatment plants are basically completed, and future automation, informatization, unattended operation, energy conservation and consumption reduction are development trends in the future.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide an accurate dosing system for a phosphorus removal agent for sewage treatment. The system solves the following problems in the prior art:
1) The problems that the dosage of the chemical phosphorus removal process in a sewage plant cannot be accurately controlled, so that the cost is high when the dosage is too large, and the effluent exceeds the standard when the dosage is too small are solved;
2) The problem of the hysteresis of the standard-reaching of the dosing and the effluent quality is solved;
3) The method solves the problems of complex operation and high labor intensity in the chemical phosphorus removal process of the sewage plant.
In order to realize the aim, the utility model designs a sewage treatment dephosphorization agent accurate dosing system, which comprises a sewage treatment pool group, a dephosphorization agent dosing assembly and an automatic control assembly;
the sewage treatment tank group comprises a pretreatment tank connected with a water inlet pipe, and the pretreatment tank is sequentially communicated with a biochemical tank, a secondary sedimentation tank, a high-efficiency sedimentation tank, an active sand filter and an ultraviolet disinfection channel;
the phosphorus removal agent feeding assembly comprises a phosphorus removal agent feeder which is arranged outside the efficient sedimentation tank; a dosing pipe is arranged at the bottom of the side wall of the phosphorus removing agent dosing device, and the other end of the dosing pipe extends into the efficient sedimentation tank from the top of the efficient sedimentation tank;
the dosing pipe is sequentially provided with a variable-frequency dosing pump and an electric ball valve from a dosing end to a dosing end;
the automatic control assembly comprises an intelligent control cabinet, a secondary sedimentation tank effluent TP online instrument and a sewage plant effluent TP online instrument; the secondary sedimentation tank effluent TP online instrument is arranged at the effluent end of the secondary sedimentation tank; the sewage plant effluent TP online instrument is arranged at the effluent end of the ultraviolet disinfection channel;
the signal output ends of the secondary sedimentation tank effluent TP online instrument and the sewage plant effluent TP online instrument are connected with the signal input end of the intelligent control cabinet;
and the signal output end of the intelligent control cabinet is respectively connected with the variable-frequency dosing pump and the electric ball valve.
The intelligent control cabinet is purchased from the market, and is internally provided with a signal acquisition module, a model calculation module and a dosing pump control module, wherein the model calculation module comprises a feedforward control module and a feedback control module. The required dosage of the phosphorus removing agent can be automatically calculated through signal collection, the dosage is converted into the frequency of the variable-frequency dosing pump, and the dosage of the phosphorus removing agent can be automatically and accurately adjusted by adjusting the frequency value of the variable-frequency dosing pump.
Furthermore, an electromagnetic flow meter is arranged on a pipeline between the pretreatment tank and the biochemical tank; an electromagnetic flowmeter is also arranged on the dosing pipe.
Still further, the signal output end of the electromagnetic flowmeter is connected with the signal input end of the intelligent control cabinet.
Still further, still be provided with manual ball valve on the dosing pipe.
Still further, a stirrer and a liquid level meter are arranged on the phosphorus removing agent doser.
Furthermore, the signal output end of the liquid level meter is connected with the signal input end of the intelligent control cabinet; and the signal output end of the intelligent control cabinet is connected with the signal input end of the stirrer.
When the liquid level is low, the stirrer is automatically stopped to operate, and an alarm is given to remind an operator to supplement the medicament; and when the liquid level is high, the alarm reminds the operator to stop replenishing the medicament.
Still further, the frequency conversion dosing pump is a diaphragm metering pump.
The utility model discloses a theory of operation:
the system of the utility model firstly collects the signals of the water inlet flow, the TP monitoring value of the effluent of the secondary sedimentation tank, the TP monitoring value of the effluent of the sewage plant, the frequency of the dosing pump, the liquid level of the dosing device, the flow of the dosing pump, the electric ball valve and the running state of the mixer device through the signal collection module in the automatic control assembly; then, a feedforward control module and a feedback control module in the model calculation module are adopted to calculate the acquired signal into the dosage through a built-in calculation module; finally, the calculated dosing amount is converted into the working frequency of the dosing pump through the dosing pump control module, and then the working frequency is converted into a control signal to be output to the programmable logic controller, so that the working of the variable-frequency dosing pump is controlled, and accurate dosing is realized.
The utility model has the advantages that:
1. the utility model can automatically control and adjust the dosage of the phosphorus removing agent by monitoring the discharge TP value of the secondary sedimentation tank and the discharge TP value of the sewage plant in real time, thereby achieving the effects of energy conservation, consumption reduction and carbon reduction on the basis of ensuring the stable standard discharge;
2. the utility model comprises a sewage treatment pool group, a phosphorus removal agent adding component and an automatic control component, wherein the system analyzes the water quality data condition by optimizing the scheduling control technology and constructing an energy-saving consumption-reducing optimized scheduling model, calculates the appropriate medicine proportion, saves the medicine cost, can effectively reduce the operation cost on the basis of realizing the standard outlet water, and realizes the energy saving and consumption reduction;
3. the utility model discloses the sewage treatment technology of system is based on two heavy ponds play water TP concentrations and sewage factory play water TP concentrations to the mode accurate control dephosphorization agent that feedforward and feedback combined together throw. The utility model discloses under the stable up-to-standard prerequisite of guarantee sewage factory play water quality of water, realized energy-conservation and reduced the consumption and subtracted carbon, make sewage factory management step forward to the direction that becomes more meticulous.
Drawings
FIG. 1 is a schematic structural diagram of a sewage treatment phosphorus removal agent precise dosing system;
in the figure, a pretreatment tank 1, a biochemical tank 2, a secondary sedimentation tank 3, a high-efficiency sedimentation tank 4, an active sand filter 5, an ultraviolet disinfection channel 6, a phosphorus removal agent dosing device 7, a stirrer 7.1, a liquid level meter 7.2, a dosing pipe 8, a variable-frequency dosing pump 9, an electric ball valve 10, an intelligent control cabinet 11, a secondary sedimentation tank effluent TP online instrument 12, a sewage plant effluent TP online instrument 13, an electromagnetic flow meter 14 and a manual ball valve 15.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments for the understanding of those skilled in the art.
The system for accurately adding the phosphorus removing agent for sewage treatment as shown in FIG. 1 comprises a sewage treatment tank group, a phosphorus removing agent adding assembly and an automatic control assembly; wherein:
the sewage treatment tank group comprises a pretreatment tank 1 connected with a water inlet pipe, and the pretreatment tank is sequentially communicated with a biochemical tank 2, a secondary sedimentation tank 3, a high-efficiency sedimentation tank 4, an active sand filter 5 and an ultraviolet disinfection channel 6; an electromagnetic flowmeter 14 is arranged on a pipeline between the pretreatment tank 1 and the biochemical tank 2;
the sewage treatment tank group comprises a phosphorus removing agent feeder 7, and a stirrer 7.1 and a liquid level meter 7.2 are arranged on the phosphorus removing agent feeder 7;
the phosphorus removing agent doser 7 is arranged outside the high-efficiency sedimentation tank 4; a dosing pipe 8 is arranged at the bottom of the side wall of the phosphorus removing agent dosing device 7, and the other end of the dosing pipe 8 extends into the efficient sedimentation tank 4 from the top of the efficient sedimentation tank 4;
the dosing pipe 8 is sequentially provided with a manual ball valve 15, a variable-frequency dosing pump 9, an electric ball valve 10 and an electromagnetic flowmeter 14 from the dosing end to the medicine outlet end;
the automatic control assembly comprises an intelligent control cabinet 11, a secondary sedimentation tank effluent TP online instrument 12 and a sewage plant effluent TP online instrument 13; the secondary sedimentation tank effluent TP online instrument 12 is arranged at the effluent end of the secondary sedimentation tank 3; the sewage plant effluent TP online instrument 13 is arranged at the effluent end of the ultraviolet disinfection channel 6;
the signal output ends of the liquid level meter 7.2, the two electromagnetic flow meters 14, the secondary sedimentation tank effluent TP online instrument 12 and the sewage plant effluent TP online instrument 13 are connected with the signal input end of the intelligent control cabinet 11;
the signal output end of the intelligent control cabinet 11 is respectively connected with the stirrer 7.1, the variable-frequency dosing pump 9 and the electric ball valve 10.
The system adopts a mode of feeding the medicament by a single pump and a single pipeline corresponding to single group of efficient precipitation, and a variable-frequency medicament feeding pump 9 is a diaphragm metering pump;
the intelligent control cabinet is purchased from the market, and is internally provided with a signal acquisition module, a model calculation module and a dosing pump control module, wherein the model calculation module comprises a feedforward control module and a feedback control module. The required dosage of the phosphorus removing agent can be automatically calculated through signal collection, the dosage is converted into the frequency of the variable-frequency dosing pump, and the dosage of the phosphorus removing agent can be automatically and accurately adjusted by adjusting the frequency value of the variable-frequency dosing pump.
The control program of the accurate dosing system for the phosphorus removing agent for sewage treatment comprises the following steps:
the system adopts a mode of combining feedforward control and feedback control.
When the system detects that the effluent TP of a certain secondary sedimentation tank is more than 0.4mg/L, the intelligent control cabinet starts a corresponding phosphorus removing agent dosing pump, and phosphorus removing agent is put into a phosphorus removing agent dosing point at a high-efficiency sedimentation tank mixing zone corresponding to the secondary sedimentation tank, wherein the dosing amount of the phosphorus removing agent is adjusted according to the following intervals:
if the effluent of the secondary sedimentation tank is detected by the system to be more than 0.4mg/L and less than or equal to 0.5mg/L of TP, the dosage of the phosphorus removing agent (liquid PAC, concentration 10%) is 4.0mg/L;
if the effluent of the secondary sedimentation tank is detected by the system to be more than 0.5mg/L and less than or equal to 0.6mg/L of TP, the dosage of the phosphorus removing agent (liquid PAC, concentration 10%) is 8.0mg/L;
if the effluent of the secondary sedimentation tank is detected by the system to be more than 0.6mg/L and less than or equal to 0.7mg/L of TP, the dosage of the phosphorus removing agent (liquid PAC, concentration 10%) is 12.0mg/L;
if the effluent of the secondary sedimentation tank is detected by the system to be more than 0.7mg/L and less than or equal to 0.8mg/L of TP, the dosage of the phosphorus removing agent (liquid PAC, concentration 10%) is 16.0mg/L;
if the effluent of the secondary sedimentation tank is detected by the system to be more than 0.8mg/L and less than or equal to 0.9mg/L of TP, the dosage of the phosphorus removing agent (liquid PAC, concentration 10%) is 20.0mg/L;
if the effluent of the secondary sedimentation tank is detected by the system to be more than 0.9mg/L and less than or equal to 1.0mg/L of TP, the dosage of the phosphorus removing agent (liquid PAC, concentration 10%) is 24.0mg/L;
by analogy, if the system detects that the adding amount of the phosphorus removing agent (liquid PAC, concentration 10%) is increased by 4.0mg/L on the basis of the existing adding amount every time the value of the TP (total phosphorus) of the secondary sedimentation tank rises within the interval range of 0.1 mg/L;
and if the system detects that the effluent TP of the secondary sedimentation tank continuously drops below 0.4mg/L for 2 times, the intelligent control cabinet closes the variable-frequency dosing pump to stop the dosing of the phosphorus removing agent.
Meanwhile, the TP value at the water outlet of the sewage plant is compared once per hour, if the system detects that the TP at the water outlet of the sewage plant is more than or equal to 0.45mg/L, the system automatically enters a feedback program, and the amount of the phosphorus removing agent calculated by feed forward control is automatically increased by 4.0mg/L.
After the sewage treatment plant applies the accurate dosing system for the phosphorus removal agent for sewage treatment, the total phosphorus in effluent after sewage is chemically removed can be stably controlled below 0.5mg/L, and when the liquid level is low, the operation of the stirrer is automatically stopped, and an alarm is given to remind an operator to supplement a medicament; when the liquid level is high, an alarm is given to remind the operator to stop replenishing the medicament; thereby achieving the effects of saving energy and reducing carbon consumption.
Other parts not described in detail are prior art. Although the above embodiments have been described in detail, it is only a part of the embodiments of the present invention, rather than all embodiments, and other embodiments can be obtained without inventive step according to the present embodiments.
Claims (7)
1. The utility model provides a sewage treatment dephosphorization agent accurate medicine system which characterized in that: the system comprises a sewage treatment tank group, a phosphorus removing agent adding component and an automatic control component;
the sewage treatment pool group comprises a pretreatment pool (1) connected with a water inlet pipe, and the pretreatment pool is sequentially communicated with a biochemical pool (2), a secondary sedimentation pool (3), a high-efficiency sedimentation pool (4), an active sand filter pool (5) and an ultraviolet disinfection channel (6);
the phosphorus removing agent feeding assembly comprises a phosphorus removing agent feeder (7), and the phosphorus removing agent feeder (7) is arranged outside the efficient sedimentation tank (4); a dosing pipe (8) is arranged at the bottom of the side wall of the phosphorus removing agent dosing device (7), and the other end of the dosing pipe (8) extends into the efficient sedimentation tank (4) from the top of the efficient sedimentation tank (4);
the dosing pipe (8) is sequentially provided with a variable-frequency dosing pump (9) and an electric ball valve (10) from the dosing end to the medicine outlet end;
the automatic control assembly comprises an intelligent control cabinet (11), a secondary sedimentation tank effluent TP online instrument (12) and a sewage plant effluent TP online instrument (13); the secondary sedimentation tank effluent TP online instrument (12) is arranged at the effluent end of the secondary sedimentation tank (3); the sewage plant effluent TP online instrument (13) is arranged at the water outlet end of the ultraviolet disinfection channel (6);
the signal output ends of the secondary sedimentation tank effluent TP online instrument (12) and the sewage plant effluent TP online instrument (13) are connected with the signal input end of the intelligent control cabinet (11);
and the signal output end of the intelligent control cabinet (11) is respectively connected with the variable-frequency dosing pump (9) and the electric ball valve (10).
2. The accurate dosing system of a phosphorus removal agent for sewage treatment of claim 1, wherein: an electromagnetic flowmeter (14) is arranged on a pipeline between the pretreatment tank (1) and the biochemical tank (2); an electromagnetic flowmeter (14) is also arranged on the dosing pipe (8).
3. The accurate dosing system of a phosphorus removal agent for sewage treatment of claim 2, wherein: and the signal output ends of the electromagnetic flowmeters (14) are connected with the signal input end of the intelligent control cabinet (11).
4. The accurate dosing system of a phosphorus removal agent for sewage treatment of claim 1, wherein: and a manual ball valve (15) is also arranged on the dosing pipe (8).
5. The accurate dosing system of sewage treatment phosphorous removal agent of claim 1, wherein: and a stirrer (7.1) and a liquid level meter (7.2) are arranged on the phosphorus removing agent doser (7).
6. The accurate dosing system of sewage treatment dephosphorization agent according to claim 5, characterized in that: the signal output end of the liquid level meter (7.2) is connected with the signal input end of the intelligent control cabinet (11); and the signal output end of the intelligent control cabinet (11) is connected with the signal input end of the stirrer (7.1).
7. The accurate dosing system of sewage treatment phosphorous removal agent of claim 1, wherein: the variable-frequency dosing pump (9) is a diaphragm metering pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222818836.5U CN218709754U (en) | 2022-10-25 | 2022-10-25 | Accurate dosing system of sewage treatment dephosphorization agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222818836.5U CN218709754U (en) | 2022-10-25 | 2022-10-25 | Accurate dosing system of sewage treatment dephosphorization agent |
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| CN218709754U true CN218709754U (en) | 2023-03-24 |
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| CN202222818836.5U Active CN218709754U (en) | 2022-10-25 | 2022-10-25 | Accurate dosing system of sewage treatment dephosphorization agent |
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- 2022-10-25 CN CN202222818836.5U patent/CN218709754U/en active Active
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