CN213266145U - Multifunctional dosing system for sewage plant - Google Patents
Multifunctional dosing system for sewage plant Download PDFInfo
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- CN213266145U CN213266145U CN202021361355.0U CN202021361355U CN213266145U CN 213266145 U CN213266145 U CN 213266145U CN 202021361355 U CN202021361355 U CN 202021361355U CN 213266145 U CN213266145 U CN 213266145U
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Abstract
The invention discloses a multifunctional dosing system for a sewage plant, which comprises a processing pool, a detection device, a dosing device and a control device, wherein the processing pool is used for storing a treatment liquid; the chemical dosing device comprises an acid-base dosing device connected with a PH neutralization tank and a chemical dosing device A2The O biochemical tank is connected with a carbon source adding device, a PAC adding device connected with the secondary sedimentation tank, a disinfectant adding device connected with the contact disinfection tank and a PAM adding device connected with the sludge concentration tank; the control device comprises fuzzy controllers which are respectively connected with the acid-base adding device, the carbon source adding device, the PAC adding device, the disinfectant adding device and the PAM adding device in a one-to-one correspondence manner; the detection devices of the treatment pools are respectively connected with corresponding fuzzy controllers, and each fuzzy controllerAre respectively connected with the central control room in a communication way. By using the fuzzy controller in the control system, the dynamic adjustment of the dosing time and the dosing amount is realized, the dosing precision is improved, the effluent quality specified by each flow is further ensured, and the energy is saved.
Description
Technical Field
The utility model relates to a sewage factory technical field especially relates to a multi-functional system of offeing medicine based on fuzzy control algorithm.
Background
The drug administration is a core treatment link in the water purification process of a sewage plant, and the added drugs comprise a PH neutralizer, a carbon source, a disinfectant, a coagulant and the like. The dosing process involves a plurality of links, and each dosing is closely related to the subsequent treatment process, and is the key for determining the quality of the effluent of the sewage plant. The non-linear relationship between the dosage of each medicament and the controlled value means that the administration process has the characteristics of time-varying property, multiple input factors, multiple disturbance, non-linearity and large time lag.
Most of the control systems adopted by the prior dosing are traditional PID control strategies, the dynamic response speed is low, the precision is low, the water quality is easy to deteriorate, and the energy consumption and the medicine consumption are increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a multi-functional medicine feeding system based on fuzzy control algorithm can solve because of the time of offeing medicine and the dose of throwing medicine can not dynamic change, leads to technical problem such as energy consumption, the increase of medicine consumption, quality of water is poor to be favorable to reducing operating personnel's intensity of labour, realize the on-line monitoring and the full automatization operation of the production operating parameter of medicine feeding technology.
The utility model discloses a multifunctional chemical dosing system for a sewage plant, which comprises a processing pool group, a detection device, a chemical dosing device and a control device;
the treatment tank group comprises a coarse and fine grid, a PH neutralization tank and a A which are sequentially connected according to the sewage treatment sequence2O biochemical tank, secondary sedimentation tank, MBR membrane tank, contact disinfection tank, and A2A sludge concentration tank connected with the water outlet of the O biochemical tank;
the detection device comprises a PH detector arranged at the water inlet and the water outlet of the PH neutralization tank, and a pH sensor arranged at A2A phosphorus and nitrogen online detector at the water inlet and the water outlet of the O biochemical tank, a turbidity meter arranged at the water inlet and the water outlet of the secondary sedimentation tank, a residual chlorine detector arranged at the water outlet of the contact disinfection tank and a turbidity meter arranged at the water inlet and the water outlet of the sludge concentration tank;
the chemical dosing device comprises an acid-base dosing device connected with the PH neutralization tank and a chemical dosing device connected with the A2The O biochemical tank is connected with a carbon source adding device, a PAC adding device connected with the secondary sedimentation tank, a disinfectant adding device connected with the contact disinfection tank and a PAM adding device connected with the sludge concentration tank;
the control device comprises fuzzy controllers which are respectively connected with the acid-base adding device, the carbon source adding device, the PAC adding device, the disinfectant adding device and the PAM adding device in a one-to-one correspondence manner;
the detection device of each treatment pool is respectively connected with the corresponding fuzzy controller, and each fuzzy controller is respectively in communication connection with the central control room.
Preferably, A is2The O biochemical pool comprises an anaerobic pool, an anoxic pool and an aerobic pool which are arranged in sequence, and the carbon source adding device is respectively arranged at the water inlets of the anaerobic pool and the anoxic pool.
Preferably, the pH neutralization tank, A2The O biochemical tank, the secondary sedimentation tank, the contact disinfection tank and the sludge concentration tank are all provided with liquid level meters.
Preferably, the liquid level meter, the turbidimeter, the PH detector, the phosphorus-nitrogen online detector and the residual chlorine detector are respectively provided with unique identification marks.
Preferably, each dosing device in the dosing devices comprises a variable frequency controller, a dosing pump and an electromagnetic valve.
The utility model discloses carry out pH and pond and throw and add acid-base, AO reaction tank and throw the dynamic control that PAC, disinfectant pond are thrown to throw and throw the disinfectant sludge thickener and throw PAM in the pond based on fuzzy controller to be favorable to reducing operating personnel's intensity of labour, realize the on-line monitoring and the full automatization operation of the production operating parameter of the technology of throwing medicine. The utility model discloses a multi-functional system of offeing medicine can not only reduce out water turbidity, still can practice thrift about 11% of medicament, practices thrift the medicament cost greatly, reduces the energy consumption, has obvious economic benefits.
Drawings
FIG. 1 is a flow chart of a sewage plant dosing process.
FIG. 2 is a diagram of a control system of the multi-functional administration system of the sewage plant;
FIG. 3(a) is a flow diagram of a particular embodiment of a pH neutralization tank dosing system;
FIG. 3(b) is a graph showing the effect of the PH neutralization tank dosing control rule;
FIG. 4(a) A2A specific flow chart of a chemical dosing system of the O biochemical pool;
FIG. 4(b) A2O, chemical dosing control rule effect diagram of the biochemical pool;
FIG. 5(a) is a flow chart of a specific embodiment of a dosing system for a secondary sedimentation tank;
FIG. 5(b) is a diagram illustrating the effect of the regulation of the chemical dosing in the secondary sedimentation tank;
FIG. 6 is a flow diagram of a particular embodiment of a dosing system for a sludge concentrator;
FIG. 7(a) is a detailed flow chart of the administration system in contact with the disinfection tank;
fig. 7(b) is a graph showing the effect of the dosing control rule of the contact disinfection tank.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The utility model provides a multi-functional medicine feeding system based on fuzzy control algorithm adopts fuzzy control, converts past practical experience into the control rule, can utilize experience and knowledge that people obtained in practice effectively, also can the accurate regulation to the control target of the mathematical model that is difficult to hold, and control mode is simple, easily the operation.
The utility model provides a multifunctional chemical dosing system for a sewage plant, which comprises a processing pool group, a detection device, a chemical dosing device and a control device;
as shown in figure 1, which is a process flow chart of a sewage plant, the treatment tank group comprises a coarse and fine grid and a PH neutralization tank which are sequentially arranged according to the sewage treatment sequence、A2O biochemical tank, secondary sedimentation tank, MBR membrane tank, contact disinfection tank, and A2A sludge concentration tank connected with the water outlet of the O biochemical tank; a is described2The O biochemical pool comprises an anaerobic pool, an anoxic pool and an aerobic pool which are arranged in sequence.
The detection device comprises a PH detector arranged at the water inlet and the water outlet of the PH neutralization tank, and a pH sensor arranged at A2A phosphorus and nitrogen online detector at the water inlet and the water outlet of the O biochemical tank, a turbidity meter arranged at the water inlet and the water outlet of the secondary sedimentation tank, a residual chlorine detector arranged at the water outlet of the contact disinfection tank and a turbidity meter arranged at the water inlet and the water outlet of the sludge concentration tank;
the chemical dosing device comprises an acid-base dosing device connected with the PH neutralization tank and a chemical dosing device connected with the A2The O biochemical tank is connected with a carbon source adding device, a PAC adding device connected with the secondary sedimentation tank, a disinfectant adding device connected with the contact disinfection tank and a PAM adding device connected with the sludge concentration tank;
the control device comprises fuzzy controllers which are respectively connected with the acid-base adding device, the carbon source adding device, the PAC adding device, the disinfectant adding device and the PAM adding device in a one-to-one correspondence manner;
the detection device of each treatment pool is respectively connected with the corresponding fuzzy controller, and each fuzzy controller is respectively in communication connection with the central control room.
As shown in fig. 2, the sewage plant multifunctional administration system based on fuzzy control comprises a monitoring layer, a communication layer and a task layer. The monitoring layer is used for data acquisition and pretreatment, and comprises a liquid level meter, a turbidimeter, a PH detector, a phosphorus-nitrogen online detector and a residual chlorine detector in each dosing link, and each measuring sensor has a unique identity; the task layer is set up in fuzzy controller, acid-base of each technology link and throw feeder apparatus, carbon source and throw feeder apparatus, PAC and throw feeder apparatus, disinfectant and throw feeder apparatus and PAM and throw feeder apparatus, and each throws feeder apparatus and includes frequency conversion controller and dosing pump, and the dosing pump is through the frequency converter control: the detection device of each dosing link is connected with the corresponding fuzzy controller, the frequency converter of each dosing device is connected with the corresponding fuzzy controller, the communication layer is used for data transmission, namely industrial Ethernet, and each fuzzy controller is interconnected through the industrial Ethernet.
When in specific implementation, the optimized fuzzy controller of the utility model is Siemens 6ES7 series PLC, and the liquid level, PH value setting value and corresponding fuzzy algorithm are respectively stored in advance in the fuzzy controller connected with the acid-base adding device; and a fuzzy controller connected with the carbon source adding device stores liquid level, nitrogen and phosphorus content setting values and corresponding fuzzy algorithms in advance respectively. And a forehead fuzzy controller connected with the PAC adding device and internally and respectively storing liquid level and turbidity content setting values and corresponding fuzzy algorithms. And a fuzzy controller connected with the disinfectant adding device stores liquid level and residual chlorine content setting values and corresponding fuzzy algorithms in advance respectively. The fifth step of connecting the fuzzy controller with the PAM feeding device is internally and respectively stored with liquid level and turbidity content setting values and corresponding fuzzy algorithms, the fuzzy controller is interconnected with a central control room through an industrial Ethernet, and the central control room can inquire each dosing process, the dosing condition and the medicine consumption statistics.
Each sensor of the detection layer has a unique specific identifier, and after the arrangement, the fuzzy controller can accurately determine the corresponding battery pack and the required program, so that the dosing device is controlled according to the program setting.
The acid-base adding device is used for sewage treatment of the PH neutralization tank. The acid-base adding component comprises a hydrochloric acid medicine storage tank and a lime milk medicine storage tank, and the hydrochloric acid medicine storage tank and the lime milk medicine storage tank are respectively connected to the PH neutralization tank through corresponding adding pipelines. The feeding pipeline is provided with an electromagnetic valve, a dosing pump and a flowmeter, the PH detector and the liquid level meter are connected with a fuzzy controller, the flowmeter, the electromagnetic valve and the dosing pump on the feeding pipeline are connected with the fuzzy controller, and the fuzzy controller controls the frequency converter through corresponding programs so as to control the flow of the dosing pump. Wherein, the dosing pump is an acid and alkali resistant diaphragm pump, the liquid level meter is an ultrasonic liquid level meter, and the flow meter is an ultrasonic flow meter.
FIG. 3(a) is a specific flow diagram of a pH neutralization tank administration system under fuzzy controller, comprising the steps of: firstly, a PH detector collects inlet water, conveys a detection value to a fuzzy controller, and controls a dosing pump to operate according to acid-base conditions. And step two, collecting the pH value of the effluent by a pH detector, collecting the liquid level of a pH neutralization tank by a liquid level meter, carrying out fuzzy quantization processing on an error e and an error change rate ec of a target value and an actual value of the pH value of the effluent, using quantized data as one input of a fuzzy controller, and carrying out fuzzy reasoning according to a fuzzy rule, wherein a control rule effect diagram is shown in a figure 3 (b). After the fuzziness is removed, controlling the opening time and the flow rate of the dosing pump, and simultaneously opening the electromagnetic valve to dose the neutralization tank; and calculating the error of the latest group again in the next period, if the error still exceeds the allowable range (e is less than 0.05), and performing fuzzy reasoning according to a fuzzy rule to adjust the flow of the dosing pump until e is less than 0.05.
The carbon source adding device is used for adding the carbon source A2And the O biochemical tank is used for supplementing a carbon source, so that the phosphorus and nitrogen removal efficiency of the microorganisms is ensured. The carbon source adding device comprises a carbon source medicine storage tank, the carbon source medicine storage tank is connected to water inlets of the anaerobic tank and the anoxic tank through a carbon source adding pipeline, an electromagnetic valve, a medicine adding pump and a flowmeter are arranged on the carbon source adding pipeline, and the carbon source is sodium acetate. A. the2The water inlet and outlet of the O biochemical pool are provided with nitrogen and phosphorus on-line detectors, as shown in FIG. 4, A is arranged below the fuzzy controller2The specific flow chart of the chemical dosing system of the O biochemical pool comprises the following steps: firstly, a nitrogen and phosphorus online detector collects nitrogen and phosphorus content of inlet water, a flowmeter detects inlet water flow and conveys a detection value to a fuzzy controller, and a dosing pump is controlled to dose according to nitrogen and phosphorus content. And step two, acquiring the content values of nitrogen and phosphorus in the effluent by a nitrogen and phosphorus online detector, carrying out fuzzy quantization processing on the error e and the error change rate ec of the target values and the actual values of the nitrogen and phosphorus in the effluent, taking the quantized data as one input of a fuzzy controller, and carrying out fuzzy reasoning according to a fuzzy rule, wherein a control rule effect diagram is shown in fig. 4 (b). After the fuzziness is removed, controlling the opening time and the flow of the chemical feeding pump, and simultaneously opening the electromagnetic valve to feed chemicals into the biochemical tank; calculating the error of the latest group in the next period, if the error still exceeds the allowable range (e)<0.2), then carrying out fuzzy reasoning according to a fuzzy rule, and adjusting the flow of a dosing pump until e<0.2。
The PAC adding device is used for adding polyaluminium chloride into the secondary sedimentation tank, and the hydrolysis product of the PAC has an adsorption effect on suspended matters in water and a coagulation effect on sewage. The PAC feeding device comprises a PAC medicine storage tank, the PAC medicine storage tank is connected to a water inlet of the secondary sedimentation tank through a PAC feeding pipeline, and an electromagnetic valve, a medicine feeding pump and a flowmeter are arranged on the feeding pipeline. A turbidity meter 1720 model of Harch corporation is initially arranged at the water inlet and the water outlet of the secondary sedimentation tank, and fig. 5(a) shows a specific flow chart of a dosing system of the secondary sedimentation tank under a fuzzy controller, which comprises the following steps: firstly, a turbidimeter collects the turbidity value of inlet water, the detected value is transmitted to a fuzzy controller, and a dosing pump is controlled to dose according to the initial turbidity condition. And step two, the fuzzy controller obtains an input signal detected by the outlet turbidimeter through interrupted sampling, compares the numerical value with a given value to obtain a deviation e, and differentiates the deviation e to obtain a deviation change rate ec. Fuzzifying the E and the EC to obtain E and EC, mapping the E and the EC to corresponding input domains to obtain fuzzy subsets, obtaining fuzzy control quantity according to fuzzy rules, and then carrying out deblurring processing on the fuzzy control quantity to obtain determined control change output quantity to control a frequency converter, wherein the frequency converter controls the time and the flow of the dosing pump. Fig. 5(b) is a control rule effect diagram.
The PAM adding device is applied to a sludge concentration tank and used for sludge dewatering, PAM is polyacrylamide, the generated floccule is large, and the dewatering efficiency is high. The structure of the PAM feeding device is similar to the fuzzy control principle, and the flow chart of the feeding system of the sludge concentration tank is shown in figure 6.
The disinfectant adding device is used for adding sodium hypochlorite into the contact disinfection tank, comprises a disinfectant medicine storage tank, is connected to the contact disinfection tank through an adding pipeline, and is provided with an electromagnetic valve, a medicine adding pump and a flowmeter. A residual chlorine detector is initially arranged at the water outlet of the disinfection tank, and as shown in fig. 7(a), a specific flow chart of a dosing system of the disinfection tank under the fuzzy controller is shown. Fig. 7(b) shows the effect diagram of the fuzzy control rule corresponding to fig. 7 (a).
The utility model discloses an use the fuzzy controller in control system, realize adding the dynamic adjustment of medicine time and dosing amount, improved and added the medicine precision, further guarantee the play water quality of water, the energy saving of every flow regulation.
While the above embodiments have been described for the purpose of illustration, it is not intended to limit the invention, and various other changes and modifications may be made by those skilled in the art based on the technical idea of the invention, and all such changes and modifications are intended to fall within the scope of the appended claims.
Claims (6)
1. The multifunctional dosing system for the sewage plant is characterized by comprising a processing pool, a detection device, a dosing device and a control device;
the treatment tank group comprises a coarse and fine grid, a PH neutralization tank and a A which are sequentially connected according to the sewage treatment sequence2O biochemical tank, secondary sedimentation tank, MBR membrane tank, contact disinfection tank, and A2A sludge concentration tank connected with the water outlet of the O biochemical tank;
the detection device comprises a PH detector arranged at the water inlet and the water outlet of the PH neutralization tank, and a pH sensor arranged at A2A phosphorus and nitrogen online detector at the water inlet and the water outlet of the O biochemical tank, a turbidity meter arranged at the water inlet and the water outlet of the secondary sedimentation tank, a residual chlorine detector arranged at the water outlet of the contact disinfection tank and a turbidity meter arranged at the water inlet and the water outlet of the sludge concentration tank;
the chemical dosing device comprises an acid-base dosing device connected with the PH neutralization tank and a chemical dosing device connected with the A2The O biochemical tank is connected with a carbon source adding device, a PAC adding device connected with the secondary sedimentation tank, a disinfectant adding device connected with the contact disinfection tank and a PAM adding device connected with the sludge concentration tank;
the control device comprises fuzzy controllers which are respectively connected with the acid-base adding device, the carbon source adding device, the PAC adding device, the disinfectant adding device and the PAM adding device in a one-to-one correspondence manner;
the detection devices of the treatment pools are respectively connected with the corresponding fuzzy controllers.
2. The multi-functional dosing system for sewage treatment plant of claim 1, wherein A is the same as A2The O biochemical pool comprises an anaerobic pool, an anoxic pool and an aerobic pool which are arranged in sequence, and the carbon source adding deviceAre respectively arranged at the water inlets of the anaerobic tank and the anoxic tank.
3. The multi-functional dosing system for sewage plants of claim 1, wherein the PH neutralization tank, a2The O biochemical tank, the secondary sedimentation tank, the contact disinfection tank and the sludge concentration tank are all provided with liquid level meters.
4. The multi-functional sewage treatment plant dosing system of claim 3, wherein the level gauge, the turbidity meter, the pH meter, the phosphorus-nitrogen on-line detector and the residual chlorine detector each have a unique identification.
5. The multifunctional dosing system for the sewage plant as recited in claim 1, wherein each dosing device of the dosing devices comprises a variable frequency controller, a dosing pump and an electromagnetic valve.
6. The multi-functional administration system of sewage plants of claim 1, wherein each fuzzy controller is communicatively connected to the central control room.
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| CN202021361355.0U CN213266145U (en) | 2020-07-13 | 2020-07-13 | Multifunctional dosing system for sewage plant |
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| CN202021361355.0U CN213266145U (en) | 2020-07-13 | 2020-07-13 | Multifunctional dosing system for sewage plant |
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