CN111018070A - Method and system for automatically controlling adding amount of flocculating agent of sludge water of water works - Google Patents
Method and system for automatically controlling adding amount of flocculating agent of sludge water of water works Download PDFInfo
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- CN111018070A CN111018070A CN201911284313.3A CN201911284313A CN111018070A CN 111018070 A CN111018070 A CN 111018070A CN 201911284313 A CN201911284313 A CN 201911284313A CN 111018070 A CN111018070 A CN 111018070A
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular 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]
Abstract
The application discloses a method and a system for automatically controlling the adding amount of a flocculating agent of sludge water of a water works. The method comprises the following steps: acquiring relation data of flowing current of supernatant of the sludge water and different adding amounts of a flocculating agent, relation data of flowing current of sludge of the sludge water and different adding amounts of the flocculating agent, and relation data of turbidity of the supernatant of the sludge water and different adding amounts of the flocculating agent; identifying an inflection point of the flowing current along with the change of the adding amount of the flocculating agent; identifying the isoelectric point of the supernatant flow current and the sludge flow current; taking a flocculating agent adding amount range formed by a flocculating agent adding amount corresponding to the inflection point and a flocculating agent adding amount slightly corresponding to the isoelectric point as an optimal flocculating agent adding amount range; and controlling the adding amount of the flocculating agent to the sludge discharge water according to the optimal flocculating agent adding amount range. The system is used for executing the method. The application can realize the dosage of the automatic control flocculating agent and can adjust the dosage of the flocculating agent in time according to the change of the flowing current of the sludge water.
Description
Technical Field
The application relates to the technical field of environmental protection, in particular to a method and a system for automatically controlling the adding amount of a flocculating agent in the sludge discharge water treatment and recovery process of a tap water plant.
Background
Water resources are an important and irreplaceable resource for human beings, and are indispensable in the survival and development processes of human beings. With the rapid development of global economy and the growing population, more and more water resources are needed by human beings. However, the frequency of water pollution events and the waste of water resources have made the global supply of water resources more and more severe.
At present, the amount of sludge water of domestic waterworks is very large, and accounts for 2 to 10 percent of the total purified water produced by the waterworks. According to the statistics of related departments, the annual discharge amount of discharged mud of domestic water purification plants is about 55 multiplied by 108m3(ii) a If the large amount of discharged muddy water is directly discharged, the environment is inevitably polluted greatly. Therefore, the treatment and recycling of the sludge water become a development trend, which can not only relieve the situation of water resource shortage, but also protect the environment. With the improvement of domestic discharge standard, the discharged muddy water must be recycled and treated.
The sludge discharged from waterworks mainly comprises sludge discharged from a sedimentation tank and backwashing water for the filter tank, and contains inorganic matters and organic matters, such as silt particles, suspended matters, coagulants, organic and inorganic colloidal particles and the like. The key link of sludge water treatment is to realize efficient sludge-water separation. The coagulating sedimentation is the main way of the current treatment of the sludge water, and the commonly used coagulants are divided into organic coagulants, inorganic coagulants, microbial coagulants and the like. The accurate addition of the flocculating agent is an important link for treating the sludge water, and the addition of the flocculating agent directly relates to the treatment effect of the sludge water and the production and operation cost of a water plant.
Due to the fact that the turbidity of the sludge water is high, the conventional visual observation method cannot accurately judge the adding amount of the flocculating agent in the sludge water treatment, and cannot accurately master the detailed processes of charge neutralization, floc growth and sludge-water separation in the sludge water after the flocculating agent is added, so that the method becomes a difficult problem in the field of sludge water treatment of water works.
The flowing current (SC) is a phenomenon in which an electric field is generated by the liquid flowing against the surface of a stationary solid, that is, an inverse process of an electroosmosis phenomenon. The flowing current plays an important role in the dosing control of the coagulation unit in the water treatment process, and can assist in guiding a water plant to adjust the dosing amount of the coagulant according to the change condition of water quality. In the treatment of muddy water in a water works, since the turbidity thereof is very high, the flow current control mode in the treatment of tap water is not completely applicable.
In the treatment of the sludge water, because the turbidity is high, a coagulant is not generally added, and only a flocculating agent is added. The adding amount of the flocculating agent is generally determined by a beaker test according to the concentration of the sludge discharge water, the operation steps are complicated, the sensitivity and the accuracy of the method are not high, and the adding amount of the flocculating agent cannot be adjusted in real time according to the dynamic change of the quality of the sludge discharge water.
The above background disclosure is only for the purpose of assisting in understanding the inventive concepts and technical solutions of the present application and does not necessarily pertain to the prior art of the present application, and should not be used to assess the novelty and inventive step of the present application in the absence of explicit evidence to suggest that such matter has been disclosed at the filing date of the present application.
Disclosure of Invention
The application provides a method and a system for automatically controlling the adding amount of a flocculating agent in the sludge water discharged from a water plant, which can realize the automatic control of the adding amount of the flocculating agent in the sludge water discharged from the water plant and can timely adjust the adding amount of the flocculating agent according to the change of the flowing current of the sludge water.
In a first aspect, the present application provides a method of automatically controlling the dosing of a waterworks sludge water flocculant, comprising: a1, obtaining relation data of supernatant fluid flowing current of the sludge water and different adding amounts of the flocculating agent; a2, acquiring relation data of sludge flowing current of sludge water and different adding amounts of a flocculating agent; a3, obtaining relation data of the turbidity of the supernatant of the sludge water and different adding amounts of the flocculating agent; a4, identifying the inflection point of the change of the flowing current along with the addition amount of the flocculating agent; a5, identifying the isoelectric points of the supernatant flowing current and the sludge flowing current; a6, taking a flocculating agent adding amount range formed by the flocculating agent adding amount corresponding to the inflection point and the flocculating agent adding amount slightly corresponding to the isoelectric point as an optimal flocculating agent adding amount range; the optimal flocculant adding amount range is a flocculant adding amount interval corresponding to the reduction of the turbidity of the supernatant; and A7, controlling the adding amount of the flocculating agent to the discharged sewage according to the optimal flocculating agent adding amount range.
In some preferred embodiments, the flocculant is a cationic polyacrylamide as the major component.
In some preferred embodiments, the method further comprises: a0, adding flocculating agents with different amounts into the discharged muddy water.
In some preferred embodiments, the a0 through a6 specifically include:
after adding a flocculating agent into the sludge discharge water, quickly stirring for a first designated time, then slowly stirring for a second designated time, measuring the sludge flowing current of the sludge discharge water, then measuring the supernatant flowing current of the sludge discharge water and the supernatant turbidity of the sludge discharge water, and obtaining a first flocculating agent adding amount range according to the relation between the sludge flowing current and different adding amounts of the flocculating agent, the relation between the supernatant flowing current and different adding amounts of the flocculating agent and the relation between the supernatant turbidity and different adding amounts of the flocculating agent;
taking the precipitated sludge, adding different amounts of flocculating agents, measuring the flowing current of the sludge, pouring the sludge into a centrifuge for centrifugation, measuring the flowing current of the sludge, the sludge dehydration rate and the flowing current of supernatant, and obtaining a second flocculating agent adding amount range according to the relation between the sludge dehydration rate and different adding amounts of the flocculating agents, the relation between the flowing current of the supernatant and different adding amounts of the flocculating agents and the relation between the flowing current of the sludge and the different adding amounts of the flocculating agents;
and obtaining the optimal flocculant adding amount range according to the first flocculant adding amount range and the second flocculant adding amount range.
In some preferred embodiments, the cationic polyacrylamide has a relative molecular weight of about 20 million.
In some preferred embodiments, the sludge water is one or more of a mixture of waterworks sedimentation basin backwash water and filter basin backwash water.
In some preferred embodiments, the sludge discharged from the sedimentation tank of the waterworks and the backwashing water of the filter tank are taken and mixed to form mixed sludge, so as to form the sludge-discharged water; and mixing the sludge in the sedimentation tank with the back flushing sludge discharge of the filter tank according to the volume ratio of 2: 1.
In a second aspect, the present application provides a system for automatically controlling the dosing of a waterworks sludge water flocculant for performing the above method.
In some preferred embodiments, comprising: the device comprises a control system, a variable-frequency dosing device, a mixer and a feedback control system; the feedback control system is connected with the mixer and the control system; the control system is used for controlling the variable-frequency dosing device to dose; the feedback control system comprises a flow meter, a flowing current detector and a turbidity meter.
In a third aspect, the present application provides a computer readable storage medium having stored therein program instructions which, when executed by a processor of a computer, cause the processor to perform the above-described method.
Compared with the prior art, the beneficial effects of the embodiment of the application are as follows:
adding flocculating agents with different amounts into the discharged muddy water; acquiring relation data of flowing current of supernatant of the sludge water and different adding amounts of a flocculating agent, relation data of flowing current of sludge of the sludge water and different adding amounts of the flocculating agent, and relation data of turbidity of the supernatant of the sludge water and different adding amounts of the flocculating agent; identifying an inflection point of the flowing current changing along with the adding amount of the flocculating agent and an isoelectric point of the flowing current of the supernatant fluid and the flowing current of the sludge; taking a flocculating agent adding amount range formed by a flocculating agent adding amount corresponding to the inflection point and a flocculating agent adding amount slightly corresponding to the isoelectric point as an optimal flocculating agent adding amount range; wherein, the optimal flocculant adding amount range is a flocculant adding amount interval corresponding to the reduction of the turbidity of the supernatant; controlling the adding amount of the flocculating agent to the sludge discharge water according to the optimal flocculating agent adding amount range; within the range, the sludge settling performance in the sludge water is the best, the turbidity of the supernatant of the sludge water is lower, and the sludge dehydration rate is the best. The embodiment of the application can realize the adding amount of the flocculating agent in the sludge discharge water of the automatic control water works, and the adding amount of the flocculating agent can be timely adjusted according to the change of the flowing current of the sludge discharge water, so that the flocculation effect can be ensured, the medicine consumption can be saved, and the automatic control of the adding amount of the flocculating agent of the sludge discharge water of the tap water can be realized.
Drawings
FIG. 1 shows flocculant dosing versus flowing current and turbidity for one embodiment of the present application;
fig. 2 illustrates the principle of automatic control of the dosage of a sludge water flocculant according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the embodiments of the present application more clearly apparent, the present application is further described in detail below with reference to fig. 1 to 2 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. The connection may be for fixation or for circuit connection.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.
The embodiment of the application provides a method for automatically controlling the adding amount of a flocculating agent for sludge water of a water works.
Taking sludge discharged from a sedimentation tank of a waterworks and filter tank backwashing water, mixing the sludge discharged from the sedimentation tank with the filter tank backwashing sludge to form mixed sludge, and treating the mixed sludge together to obtain sludge water to be treated. In the example, the sludge in the sedimentation tank and the back flushing sludge in the filter tank in the mixed sludge are mixed according to the volume of 2: 1.
Cationic Polyacrylamide (PAM) is used as a flocculating agent, a PAM solution with a certain concentration is prepared, for example, a solution with the initial concentration of 1000mg/L is prepared, and the PAM solution is used after being placed for a period of time, for example, 24 hours. Among them, cationic polyacrylamide, i.e., PAM, has a relative molecular weight of about 20 ten thousand.
First, a sludge sedimentation experiment was performed. Diluting the PAM solution with the initial concentration into PAM solutions with different concentrations; adding a first volume of sludge discharge water, such as 500mL, into a container with a first volume, such as a 1000mL beaker, adding different amounts of PAM solution, namely adding PAM solution with different concentrations, wherein for example, the PAM adding amounts are 0, 2, 4, 6, 8, 10mg/L and other predetermined concentrations in sequence; firstly, stirring quickly for a first designated time such as 1min, then stirring slowly for a second designated time such as 2min, and measuring the sludge flowing current of the discharged muddy water; the sludged water from the first volume container is poured into a first volume measuring container, such as a 500mL graduated cylinder, the sludge volume is recorded at different times, and the supernatant flow current and the supernatant turbidity are determined, in particular after pouring into the graduated cylinder and settling for 30 min. Wherein the rapid stirring speed is 100rpm, the slow stirring speed is 45rpm, and the stirring is realized by a ZR4-6 type six-combined coagulation test stirrer.
Table 1 shows the change of the sludge volume of the sludge in the sludge-discharging water with time, which is obtained by settling for 30min after adding PAM with different concentrations of 0, 2, 4, 6, 8 and 10 mg/L. With the increase of the PAM adding amount, the trend that the sludge volume is reduced within 30min is accelerated; when PAM is not added, the settling property of the sludge is poor; when the dosage reaches 8-10mg/L, the sedimentation rate is 7.15-7.35 cm/min, and the final sludge volume is reached after sedimentation for 10 min.
TABLE 1 influence of flocculant PAM dosage on sludge settling property of sludge discharge water
Then, a sludge dewatering experiment was performed. Taking sludge precipitated in a sludge sedimentation experiment, adding different amounts of flocculating agents, and measuring the flowing current of second sludge, wherein the adding amount of PAM is 0, 2, 4, 6, 8, 10, 14, 18, 26 and 34mg/L in sequence; pouring the PAM into a centrifuge for centrifugation after adding PAM each time; the centrifuge of the embodiment is a TDL-5-A type low-speed desk type large-capacity centrifuge, the rotating speed of the centrifuge is 2000rpm, and the centrifugation time is 1 min; after centrifugation, the volume of the supernatant and the flow current of the centrifuged supernatant were measured, respectively, and the sludge dehydration rate was calculated from the volume of the supernatant.
Table 2 shows the data of the sludge centrifugal dehydration after adding PAM with different concentrations of 0, 2, 4, 6, 8, 10, 14, 18, 26 and 34 mg/L. It can be seen that the flow current values of the sludge and the supernatant are not greatly different and have the same change trend. In the PAM adding amount range of 0-8mg/L, the flowing current value of the sludge and the supernatant fluid changes more smoothly, the electric neutralization effect is not obvious, and the adsorption bridge plays a main role; when the dosage of PAM is in the range of 8-36mg/L, the flowing current value of sludge and supernatant thereof is gradually increased along with the increase of dosage, the dosage at the isoelectric point is respectively 24.5mg/L and 25.5mg/L, the dosage at the maximum dehydration rate is 26mg/L and is slightly larger than the dosage at the isoelectric point, which shows that the electro-neutralization mechanism plays an important role in sludge dehydration and the adsorption-bridging mechanism also plays a certain role.
TABLE 2 influence of flocculant PAM dosage on sludge dewatering Performance
FIG. 1 shows the change of the flow current values of the sludge and the supernatant after sedimentation with the increase of the amount of PAM added. When the PAM adding amount is increased, the PAM adding amount is close to zero at 8.9mg/L and reaches a positive value at 10mg/L, and the change trends of the flowing current values of the supernatant and the sludge are similar, namely the change trends of the flowing current values of the supernatant and the sludge are from a negative value to zero and then to the positive value. In the comprehensive table 1 and fig. 1, the optimum addition amount determined according to the isoelectric point is 8.9mg/L, the optimum addition amount determined according to the sedimentation rate and the final sludge volume in the comprehensive table 1 is 9.0mg/L, and a flocculant addition amount interval corresponding to the turbidity reduction of the supernatant is just a flocculant concentration range formed by a flocculant addition amount corresponding to the inflection point of the sludge flowing current and a flocculant addition amount slightly corresponding to the isoelectric point (the point at which the flowing current is zero), so that the flowing current value corresponding to the actual addition amount is close to the position interval between the inflection point of the sludge flowing current and the isoelectric point, and the flocculant addition amount can obtain satisfactory flocculation effect in the interval and is taken as the optimum flocculant addition amount range.
After the sludge sedimentation experiment is completed, three index change trend curves of PAM adding amount, flow current value (including flow current value of sludge discharge water and flow current value of supernatant on the sludge discharge water), turbidity value of the supernatant and the like are drawn, and the three curves are compared to find out the adding amount range of the first flocculant, namely the adding amount range of the first flocculant is obtained according to the relation between the flow current of the sludge and different adding amounts of the flocculant, the relation between the flow current of the supernatant and different adding amounts of the flocculant and the relation between the turbidity of the supernatant and different adding amounts of the flocculant. The first flocculant adding amount range is formed by the flocculant adding amount corresponding to the flow current inflection point and the flocculant adding amount corresponding to the isoelectric point.
After the sludge dewatering experiment is completed, three index change trend curves (table 2) such as PAM adding amount, sludge dewatering rate and flowing current value (including supernatant flowing current and sludge flowing current) are drawn, and the three curves are compared to find out the adding amount range of the second flocculating agent. The adding amount range of the second flocculating agent is the corresponding PAM adding amount when the sludge dewatering rate is maximum and is slightly larger than the corresponding PAM adding amount when the isoelectric point is reached.
The optimal flocculant adding amount range can be obtained by combining the first flocculant adding amount range and the second flocculant adding amount range.
In summary, the method for automatically controlling the dosage of the flocculating agent for sludge water of the waterworks of the embodiment comprises the following steps: adding flocculating agents with different amounts into the discharged muddy water; obtaining relation data of flowing current of supernatant of the sludge water and different adding amounts of the flocculating agent; acquiring relation data of sludge flowing current of sludge water and different adding amounts of a flocculating agent; obtaining relation data of the turbidity of the supernatant of the sludge water and different adding amounts of the flocculating agent; identifying an inflection point of the flowing current along with the change of the adding amount of the flocculating agent; identifying the isoelectric points of the flowing current of the supernatant and the flowing current of the sludge; taking a flocculating agent adding amount range formed by a flocculating agent adding amount corresponding to the inflection point and a flocculating agent adding amount slightly corresponding to the isoelectric point as an optimal flocculating agent adding amount range; wherein, the optimal flocculant adding amount range is a flocculant adding amount interval corresponding to the reduction of the turbidity of the supernatant; controlling the adding amount of the flocculating agent to the sludge discharge water according to the optimal flocculating agent adding amount range; within the range, the sludge settling performance in the sludge water is the best, the turbidity of the supernatant of the sludge water is lower, and the sludge dehydration rate is the best.
The present embodiment further provides a system for automatically controlling the amount of the flocculating agent added to the sewage water from the waterworks, that is, the system for automatically controlling the amount of the flocculating agent added to the sewage water from the waterworks of fig. 2, which is used for executing the method of the present embodiment, and can realize the automatic control of the amount of the flocculating agent added to the sewage water from the waterworks. The system of the present embodiment includes a control system 1, a variable frequency medication administration device 2, a mixer 3, and a feedback control system 4.
The control system 1 is specifically a plc (programmable Logic controller) control system.
The feedback control system 4 is arranged at the sludge water outlet and comprises a flow meter 41 for measuring the flow rate of sludge water, a flowing current detector 42 for measuring sludge and supernatant and a turbidity meter 43 for measuring the turbidity of sludge supernatant. The flow current detector 42 is a Micro2000 type flow current meter. The turbidimeter 43 is an on-line turbidimeter, in particular a Hach 2100P turbidimeter.
The input ends of the flow meter 41, the turbidity meter 43 and the flowing current detector 42 are respectively connected with the output end of the mixer 3; the output ends of the flow meter 41, the turbidity meter 43 and the flowing current detector 42 are respectively connected with the input end of the PLC control system 1; the PLC control system 1 controls the variable-frequency dosing device 2 to automatically and accurately dose according to the detection information of the feedback control system 4, and specifically controls the variable-frequency dosing device 2 to dose the dosing amount of the flocculating agent into the sludge discharge water according to the optimal flocculating agent dosing amount range.
Because the water quality of the tap water plant changes little every quarter every year, a relation curve of flocculant PAM adding amount and flowing current and turbidity can be made every quarter, namely a graph 1, and the result is transmitted to the tap water plant sludge water flocculant adding amount automatic control system of the embodiment, the numerical value change trend of the flowing current is monitored, and the synchronous change trend of the flocculant adding amount and the turbidity of the sludge water supernatant is compared; the PLC control system 1 adjusts the adding amount of the flocculating agent, transmits an instruction to the variable frequency dosing device 2, and then the variable frequency dosing device 2 adds a certain amount of flocculating agent to the mixer 3 so as to carry out the subsequent process. The feedback control system 4 measures the flow rate, the flowing current and the supernatant turbidity of the muddy water before the muddy water treatment, and feeds the result back to the PLC control system 1; the PLC control system 1 feeds back according to the flow, the flowing current and the turbidity value, and automatically adjusts the adding amount of the flocculating agent in time.
The advantages of the embodiment of the application include:
the optimal flocculant adding amount can be judged according to the flowing current values of the sludge and the supernatant, and the flocculant adding amount in the sludge discharge water can be automatically controlled;
the flocculating agent can be accurately added in real time, and the medicine consumption is saved. The on-line flow current instrument can quickly feed back the flocculant adding amount information according to the actual working condition of the sludge water, so that the stability of the sludge water treatment is ensured;
the automation degree is high, the labor intensity of the staff of the water works can be reduced, and the medicine consumption can be reduced, thereby improving the efficiency;
the operation process is slightly interfered by the concentration of the discharged muddy water, the stability of the treatment of the discharged muddy water can be improved, and the recovery of the discharged muddy water can be promoted, so that the economic benefit of a water plant is improved;
the method has the advantages that the flowing current is used as a single factor, the addition amount of the flocculating agent in the sludge discharge water of the waterworks can be simply, effectively and quickly controlled, the method is a simple, efficient and stable real-time control method for the addition amount of the flocculating agent, and the stable operation of the sludge discharge water treatment process and equipment can be guaranteed.
Those skilled in the art will appreciate that all or part of the processes of the embodiments methods may be performed by a computer program, which may be stored in a computer-readable storage medium and executed to perform the processes of the embodiments methods. And the aforementioned storage medium includes: various media capable of storing program codes, such as ROM or RAM, magnetic or optical disks, etc.
The foregoing is a further detailed description of the present application in connection with specific/preferred embodiments and is not intended to limit the present application to that particular description. For a person skilled in the art to which the present application pertains, several alternatives or modifications to the described embodiments may be made without departing from the concept of the present application, and these alternatives or modifications should be considered as falling within the scope of the present application.
Claims (10)
1. A method for automatically controlling the adding amount of a flocculating agent of sludge water of a water works is characterized by comprising the following steps:
a1, obtaining relation data of supernatant fluid flowing current of the sludge water and different adding amounts of the flocculating agent;
a2, acquiring relation data of sludge flowing current of sludge water and different adding amounts of a flocculating agent;
a3, obtaining relation data of the turbidity of the supernatant of the sludge water and different adding amounts of the flocculating agent;
a4, identifying the inflection point of the change of the flowing current along with the addition amount of the flocculating agent;
a5, identifying the isoelectric points of the supernatant flowing current and the sludge flowing current;
a6, taking a flocculating agent adding amount range formed by the flocculating agent adding amount corresponding to the inflection point and the flocculating agent adding amount slightly corresponding to the isoelectric point as an optimal flocculating agent adding amount range; the optimal flocculant adding amount range is a flocculant adding amount interval corresponding to the reduction of the turbidity of the supernatant;
and A7, controlling the adding amount of the flocculating agent to the discharged sewage according to the optimal flocculating agent adding amount range.
2. The method of claim 1, further comprising: the main component of the flocculant is cationic polyacrylamide.
3. The method of claim 1, further comprising: a0, adding flocculating agents with different amounts into the discharged muddy water.
4. The method of claim 2, wherein the A0-A6 further comprises:
after adding a flocculating agent into the sludge discharge water, quickly stirring for a first designated time, then slowly stirring for a second designated time, measuring the sludge flowing current of the sludge discharge water, then measuring the supernatant flowing current of the sludge discharge water and the supernatant turbidity of the sludge discharge water, and obtaining a first flocculating agent adding amount range according to the relation between the sludge flowing current and different adding amounts of the flocculating agent, the relation between the supernatant flowing current and different adding amounts of the flocculating agent and the relation between the supernatant turbidity and different adding amounts of the flocculating agent;
taking the precipitated sludge, adding different amounts of flocculating agents, measuring the flowing current of the sludge, pouring the sludge into a centrifuge for centrifugation, measuring the flowing current of the sludge, the sludge dehydration rate and the flowing current of supernatant, and obtaining a second flocculating agent adding amount range according to the relation between the sludge dehydration rate and different adding amounts of the flocculating agents, the relation between the flowing current of the supernatant and different adding amounts of the flocculating agents and the relation between the flowing current of the sludge and the different adding amounts of the flocculating agents;
and obtaining the optimal flocculant adding amount range according to the first flocculant adding amount range and the second flocculant adding amount range.
5. The method of claim 2, further comprising: the cationic polyacrylamide has a relative molecular weight of about 20 ten thousand.
6. The method of claim 1, further comprising: the sludge water is one or more mixed water of the back flush water of the sedimentation tank and the back flush water of the filter tank of the water works.
7. The method of claim 1, further comprising: taking sludge discharged from a sedimentation tank of a waterworks and filter backwashing water, and mixing the sludge discharged from the sedimentation tank with the filter backwashing sludge to form mixed sludge to form the sludge discharge water; and mixing the sludge in the sedimentation tank with the back flushing sludge discharge of the filter tank according to the volume ratio of 2: 1.
8. The utility model provides a system for automatic control water works sludge discharge water flocculating agent dosage which characterized in that: for carrying out the method according to any one of claims 1 to 7.
9. The system of claim 8, comprising:
the device comprises a control system, a variable-frequency dosing device, a mixer and a feedback control system;
the feedback control system is connected with the mixer and the control system;
the control system is used for controlling the variable-frequency dosing device to dose;
the feedback control system comprises a flow meter, a flowing current detector and a turbidity meter.
10. A computer-readable storage medium characterized by: the computer-readable storage medium has stored therein program instructions which, when executed by a processor of a computer, cause the processor to carry out the method according to any one of claims 1 to 7.
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| CN111672172A (en) * | 2020-04-24 | 2020-09-18 | 清华大学 | Method and system for controlling backwashing duration of filter tank |
| CN112099455A (en) * | 2020-09-30 | 2020-12-18 | 龙宽伟 | Chemical adding control method and system for water plant |
| CN117133381A (en) * | 2023-08-01 | 2023-11-28 | 观星智能科技(西安)有限责任公司 | Flocculant addition amount real-time optimization method and system based on multi-cup tank flocculation experiment |
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| CN111672172A (en) * | 2020-04-24 | 2020-09-18 | 清华大学 | Method and system for controlling backwashing duration of filter tank |
| CN112099455A (en) * | 2020-09-30 | 2020-12-18 | 龙宽伟 | Chemical adding control method and system for water plant |
| CN117133381A (en) * | 2023-08-01 | 2023-11-28 | 观星智能科技(西安)有限责任公司 | Flocculant addition amount real-time optimization method and system based on multi-cup tank flocculation experiment |
| CN117133381B (en) * | 2023-08-01 | 2024-03-19 | 观星智能科技(西安)有限责任公司 | Flocculant addition amount real-time optimization method and system based on multi-cup tank flocculation experiment |
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