CN112957938A - Automatic lime water configuration system and control method thereof - Google Patents
Automatic lime water configuration system and control method thereof Download PDFInfo
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- CN112957938A CN112957938A CN202110059796.8A CN202110059796A CN112957938A CN 112957938 A CN112957938 A CN 112957938A CN 202110059796 A CN202110059796 A CN 202110059796A CN 112957938 A CN112957938 A CN 112957938A
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Classifications
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- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/51—Methods thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/53—Mixing liquids with solids using driven stirrers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/59—Mixing systems, i.e. flow charts or diagrams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/181—Preventing generation of dust or dirt; Sieves; Filters
- B01F35/189—Venting, degassing or ventilating of gases, fumes or toxic vapours during mixing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2112—Level of material in a container or the position or shape of the upper surface of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2117—Weight
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/2201—Control or regulation characterised by the type of control technique used
- B01F35/2209—Controlling the mixing process as a whole, i.e. involving a complete monitoring and controlling of the mixing process during the whole mixing cycle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
- B01F35/2211—Amount of delivered fluid during a period
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/305—Treatment of water, waste water or sewage
Abstract
The invention relates to an automatic lime water configuration system and a precise control method thereof. The lime water automatic configuration system comprises a tap water pool, a water pump, a chemical mixing tank, a transfer pump, a medium-pressure chemical discharging tank, a chemical discharging pump and a sewage pool which are sequentially communicated through pipelines; a chemical stirring machine is arranged in the chemical stirring barrel, and an ultrasonic liquid level sensor is arranged at the upper part of the chemical stirring machine; a middle drug storage and discharge barrel is internally provided with a middle drug storage and discharge stirrer, and the upper part of the middle drug storage and discharge barrel is provided with an ultrasonic liquid level sensor; a lime storage tank, a weighing device and a dust collector are sequentially arranged between the tap water tank and the chemical stirring barrel, a plate turnover machine is arranged at an outlet of the lower portion of the lime storage tank and connected with a crusher, an outlet of the crusher is connected with a screw machine, the screw machine is connected with the weighing device, and the system is controlled by an electric control system.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to an automatic lime water configuration system and an accurate control method thereof.
Background
In the field of sewage treatment, lime water is an important medicament, and the main function of the lime water is to adjust the pH value of sewage, reduce the alkalinity and the salt content and remove suspended impurities. Lime water preparation system commonly used at present adopts the artifical mode of throwing lime preparation of throwing, carries lime earlier and weighs the back and send into the chemical medicine agitator that is equipped with water on the weighing device and mix, this kind of operation mode process need consume a large amount of manpower and materials, and prepares inefficiency, and the operational environment scene is poor, and the operational environment raise dust is serious, and it is accurate that artifical addition lime can't accomplish the ration simultaneously, makes the lime water concentration of preparing differ, is unfavorable for subsequent sewage purification. For this reason, some sewage treatment plants are to improve the lime adding precision, install the weighing device to detect and weigh under the original sewage treatment lime water storage tank, as the utility model patent of publication No. CN204911265U discloses a lime water configuration system in sewage treatment, the utility model patent of publication No. CN204911337U discloses an automatic dispensing system for sewage treatment, its technical scheme is to set up the weighing device at the bottom of the sewage treatment grey water storage tank, then send lime into the lime water storage tank by tank car and then convey lime from the lime storage tank to the chemical stirring tank by screw conveyor, the amount that lime is sent into the chemical stirring tank is the reduction of the total weight of the whole lime storage tank weighing, its deficiency is that when lime is added, still need staff to watch the weighing data by side, control the open and close of the discharge port of the lime storage tank to control the lime addition amount simultaneously, the lime water treatment device does not have an automatic and accurate dosing function, workers easily introduce human factors into a lime addition control link in the lime water operation and configuration process, so that the lime addition amount has large fluctuation in precision, the configured lime water has poor concentration stability, and the sewage treatment effect is further influenced.
In order to further improve the lime adding accuracy and reduce the risk of manual operation errors, people replace manual start-stop lime conveying by adding a control device in a lime water configuration system to achieve the effect of accurate and quantitative addition of lime. If the utility model discloses a patent of publication number CN205032145U utility model, a lime metering device of sewage treatment medicine system is disclosed, its technical scheme is through increasing controlling means between electronic weighing device and conveyor, utilize opening of controlling means control conveyor to stop the addition that makes lime accurate, its biggest weak point is the addition that lime could be controlled to the water yield in the chemical mixing tank of all must manual measurement in advance when adding lime at every turn, when lime can not quantitative automatic input, also can not accurately add the lime and dilute the water demand volume of colluding and concocting, the lime water concentration error of configuration out, can't satisfy the accurate stability that lime water used.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an automatic lime water configuration system and an accurate control method thereof, wherein the automatic lime water configuration system and the accurate control method thereof replace manual weighing, lime adding and water adding operation links by automatically controlling the addition of lime and lime dilution hook mixing water through monitoring the liquid level of lime water in real time, so that the whole sewage treatment lime water configuration link realizes unmanned automatic control operation, the aims of quick, accurate and stable lime water configuration, reduction of labor intensity of workers and improvement of working efficiency are achieved, and the addition of water and lime is controlled by judging and instructing the on-off of a water pump and a lime storage tank according to the preset value of the system according to the requirement of the sewage treatment lime water usage, so that the concentration of the lime water meets the requirement of stable and controlled sewage treatment. The lime water automatic configuration system completely gets rid of the operation of configuring lime water by periodically and quantitatively adding lime and diluting water by a lime dilution hook depending on artificial subjective consciousness, can accurately control the adding amount of lime and water according to the sewage treatment requirement by setting parameters in advance through the system to rapidly configure the lime water, has the advantages of stable lime water concentration kept in the use range required by sewage treatment, high automation degree and accurate and controlled addition. The invention further aims to provide a lime water automatic configuration accurate control method which adopts an ultrasonic liquid level sensor to monitor, collect and analyze the lime water configuration amount in real time, controls a weighing sensor to accurately and quantitatively adjust the addition amount of lime and water through system set value judgment, simplifies the process flow, has high lime water configuration efficiency, avoids the fluctuation of lime and water addition accuracy caused by human factor misoperation, and ensures that the whole lime water configuration link area realizes unmanned automatic accurate control and the lime water configuration concentration can be constantly kept in the use range required by sewage treatment.
The technical scheme of the invention is that the automatic lime water configuration system is characterized by comprising a tap water tank, a water pump, a chemical stirring barrel, a transfer pump, a middle-dumping chemical barrel, a chemical discharging pump and a sewage tank which are sequentially communicated through pipelines; a chemical stirring machine is arranged in the chemical stirring barrel, and an ultrasonic liquid level sensor is arranged at the upper part of the chemical stirring machine; a middle drug storage and discharge barrel is internally provided with a middle drug storage and discharge stirrer, and the upper part of the middle drug storage and discharge barrel is provided with an ultrasonic liquid level sensor; a lime storage tank, a weighing device and a dust collector are sequentially arranged between the tap water tank and the chemical stirring barrel, a plate turnover machine is arranged at an outlet of the lower portion of the lime storage tank and connected with a crusher, an outlet of the crusher is connected with a screw machine, the screw machine is connected with the weighing device, and the system is controlled by an electric control system.
Preferably, the method comprises the following steps: the weighing device comprises a support frame, a hopper supported by the support frame, a dust cover arranged above the hopper, a pneumatic gate arranged at an outlet at the lower part of the hopper, a vibrator arranged at the middle part of a cavity of the hopper, and three weighing sensors arranged at the positions of three supporting points.
Preferably, the method comprises the following steps: and a dust removal pipe is arranged at an opening at the side edge of the dust cover above the weighing device and connected with a dust collector, and is used for collecting lime flying dust dissipated in the lime water configuration process.
Preferably, the method comprises the following steps: the chemical agent stirring machine and the transfer drug storage stirring machine are composed of a fixed support, a fixed base plate fixedly arranged on one side of the fixed support, a motor fixedly connected on the fixed base plate, a driven belt pulley driven by the motor through a transmission belt, and stirring paddles fixedly arranged on a driven shaft of the driven belt pulley.
Preferably, the method comprises the following steps: the electric control system comprises a PLC, a weighing sensor, a junction box, a weighing transmitter, an ultrasonic liquid level sensor, a frequency converter, a water pump, a transfer pump, a medicine discharge pump, a stirrer, a plate turnover machine, a screw machine, a crusher, a water pump, an electromagnetic valve, a pneumatic gate and a vibrator; the PLC receives and sends signals of the weighing sensor, the junction box, the weighing transmitter, the ultrasonic liquid level sensor, the frequency converter, the water pump, the transfer pump, the medicine discharge pump, the stirrer, the plate turnover machine, the screw machine and the crusher in a communication mode, and controls the actions of the electromagnetic valve, the pneumatic valve and the vibrator in a mode of sending switching value signals; and the PLC is connected with the touch screen in an RS232 communication mode.
Another technical solution of the present invention is a control method of the automatic lime water configuration system, which is characterized by comprising the following steps:
firstly, electrifying and starting a system;
secondly, the system sets that when the height of the liquid level of the chemical agent stirring barrel is lower than 1 meter, a water pump is started to replenish water, and when the height reaches 5 meters, the water replenishing is stopped; when the liquid level of the dumping chemical barrel is lower than 2 m in the setting, the lime water device is started to allocate lime water, and the operation is stopped when 9 m is reached;
the PLC reads the liquid level H of the lime water in the middle-dumping medicine barrel in real time through the ultrasonic liquid level sensort；
Fourth judgment liquid level HtIf the particle size is less than 2 meters, opening a medicine discharge pump, and continuously adding lime water into the sewage pool; if yes, entering the next step;
fifthly, reading height H of liquid level of chemical stirring barrel by PLC through ultrasonic sensor1；
Sixth, judgeHeight H of liquid level1If the lime water is less than 1 meter, starting a transfer pump, and pumping the lime water from the chemical stirring barrel to the transfer stirring barrel; if not, entering the next step;
sending a starting instruction to a seventh frequency converter by the PLC, starting a water pump by the seventh frequency converter to add water into the chemical stirring barrel, namely pumping water into the chemical stirring barrel from the industrial water pool until the liquid level in the chemical stirring barrel reaches 3 m, and stopping pumping water;
and (ii) determining the height H of the liquid level1If not, returning to step-quietness; if yes, entering the next step;
the self-supporting PLC reads the height H of the liquid level of the chemical stirring barrel in an RS485 communication mode2Calculating the weight N of lime to be added1；
The starting of the plate turnover machine, the crusher and the screw machine is required to convey lime to the weighing device until the weight of the lime on the weighing device reaches N1Then, stopping turning over the plate machine;
opening a pneumatic gate, starting a vibrator at the same time, sending all lime in the hopper into the chemical stirring barrel, and opening the chemical stirring machine to fully and uniformly stir;
and returning the step sixteenth and the step fifthly in the step order.
Preferably, the method comprises the following steps: the system is electrified and started, and the method further comprises the following steps: and the PLC sends a starting signal to the sixth frequency converter after receiving the starting command, and the sixth frequency converter controls the transfer medicine storage stirrer to normally rotate.
Preferably, the method comprises the following steps: step four judge liquid level Ht< 2 meters, further comprising: the PLC reads the liquid level of lime water in a dumping medicine barrel during real-time detection of the second ultrasonic liquid level sensor, judges whether the liquid level is lower than 2 meters, and if not, the PLC sends an instruction to the ninth frequency converter, the ninth frequency converter starts a medicine discharging pump, and lime water is continuously added to the sewage pool; if yes, the lime water arrangement system is started.
Preferably, the method comprises the following steps: sixthly, judging the height H of the liquid level1< 1 meter, further comprising: the PLC reads the first ultrasonic liquid level sensor to detect the chemical medicine stirring barrel liquid in an RS485 communication modeJudging whether the liquid level is lower than 1 meter or not, if so, sending a starting signal to a fourth frequency converter by the PLC, controlling the chemical mixer to operate and mix by the fourth frequency converter, controlling the mixing time to be 10-15 minutes, and finishing the lime water preparation; the PLC sends a starting signal to the eighth frequency converter, the eighth frequency converter starts the transfer pump, and the prepared lime water is conveyed from the chemical mixing tank to the intermediate-dump chemical tank to be temporarily stored for later use.
Preferably, the method comprises the following steps: step-self-colouring said calculation of the weight N of lime required to be added1Further comprising:
the PLC calculates the following according to the liquid level height before and after the chemical stirring barrel is read and added with water, and the lime addition amount is obtained:
setting the ratio of lime and water required by the sewage treatment process in a factory as N/M, and setting the radius of a chemical stirring barrel as r:
the height H of the chemical agent stirring barrel before water is added is measured by a first ultrasonic liquid level sensor1The height after adding water is H2Namely, the height of newly added water in the chemical stirring barrel is as follows:
H＝H2－H1
the volume of the water added in the chemical stirring barrel is as follows:
V＝πr2H
the density of water at normal temperature is 1kg/L, and the addition amount of water can be calculated as M1＝V×1kg/L
Then the corresponding amount of lime added can be calculated as:
N1＝M1×N/M。
preferably, the method comprises the following steps: the steps are further as follows: PLC sends start signal for first converter, tenth converter and second converter, start the panel turnover machine simultaneously, breaker and screw rod machine, rotate through the panel turnover machine and give the breaker from the unloading in the lime holding vessel, the screw rod machine is given in the unloading of rethread breaker, carry the hopper weighing device to lime by the screw rod machine, then the weight of lime in the hopper is detected out in real time by weighing sensor among the hopper weighing device, send PLC through the changer of weighing through the terminal box again, after reaching the volume of the lime that needs to add, PLC sends the instruction again and stops the panel turnover machine, breaker and screw rod machine.
Preferably, the method comprises the following steps: the step further comprises: PLC sends the enabling signal to first solenoid valve and second solenoid valve, opens pneumatic gate and vibrator simultaneously, puts into chemical mixing agitator all weighed lime.
Preferably, the method comprises the following steps: the step of: the second ultrasonic liquid level sensor transmits the liquid level of the middle storage medicine barrel to the PLC in real time, when the liquid level reaches 9 m, the PLC sends out an instruction again, the middle transfer pump is stopped to convey lime water into the middle storage medicine barrel, and a lime water configuration working cycle can be completed; when the sewage treatment needs dosing, the lime water is delivered out by the lime water delivery pipe through the lime water delivery pump.
Compared with the prior art, the invention has the beneficial effects that:
the lime and water automatic configuration system provided by the invention can control the lime and water to be quantitatively added and quickly prepare the lime water only by setting parameters in advance, completely gets rid of the operation of configuring the lime water by quantitatively adding lime and water at regular time and depending on artificial subjective consciousness, simplifies the links of manual weighing and adding lime and water, realizes unmanned automatic control in the whole sewage and lime configuration processing area, improves the working efficiency of lime water configuration, and reduces the labor intensity of workers; meanwhile, dust dissipated when lime is conveyed and discharged is sucked and collected through the dust removing device, lime dust is prevented from splashing to pollute the environment, the site is kept clean, and the production requirement of environmental protection is met.
According to the automatic lime water configuration accurate control method, the lime water configuration amount is monitored, collected and analyzed in real time by the ultrasonic liquid level sensor, the addition amount of lime and water is accurately adjusted by the weighing sensor through system setting value judgment, the whole lime water configuration process is efficient, rapid, stable and controlled in concentration, accurate and non-waste in lime and water addition, and the sewage purification effect is effectively improved.
The automatic lime water configuration and accurate control method is high in automation degree, accurate and controlled in material distribution and strong in operation performance, greatly improves sewage treatment efficiency, reduces production cost, and meets the national intelligent development direction.
Drawings
FIG. 1 is a schematic control diagram of an automatic lime water configuration system according to the present invention;
FIG. 2 is a schematic view of the components of the weighing apparatus of the present invention;
FIG. 3 is a block diagram of the blender of the present invention;
FIG. 4 is an electrical control schematic diagram of the automatic lime water configuration system of the present invention;
FIG. 5 is a flow chart of the precise control of the automatic lime water configuration system according to the present invention.
The main reference symbols in the drawings illustrate that:
tap water pool 1 screw machine 2 crusher 3 plate turnover machine 4
Ultrasonic liquid level sensor 13 transfer medicine storage stirrer 14 transfer stirring barrel 15 sewage pool 16
Weighing sensor 70 of transferring conveying pipe 21, medicine feeding conveying pipe 22, lime water conveying pipe 23 and weighing sensor
The driven shaft 114 stirring paddle 115 and the driving belt 116 are fixed on the bottom plate 117
Fixing support 118
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings:
fig. 1 and 2 show an automatic lime water configuration system of the invention.
Referring to fig. 1 and 2, in the automatic lime water allocation system, a water pump 17 is disposed in the middle of a tap water delivery pipe 20, and the two ends of the tap water delivery pipe are respectively communicated with a tap water tank 1 and a chemical stirring barrel 12; a transfer pump 18 is arranged in the middle of the transfer conveying pipe 21, and the two ends of the transfer conveying pipe are respectively communicated with the chemical mixing barrel 12 and the intermediate transfer medicine barrel 15; the middle-dump pesticide barrel 15 is connected with a pesticide discharge pump 19 through a pesticide discharge conveying pipe 22, and the pesticide discharge pump 19 is connected with a sewage pool 16 through a lime conveying pipe 23; a chemical stirring machine 11 is arranged in the chemical stirring barrel 12, and an ultrasonic liquid level sensor 10 is arranged at the upper part of the chemical stirring barrel; an ultrasonic liquid level sensor 13 is arranged at the upper part of a middle storage medicine barrel 15, and a middle storage medicine stirrer 14 is arranged in the barrel; a plate turnover machine 4 is arranged at an outlet at the lower part of the lime storage tank 5 and is connected with the upper part of the crusher 3, and the lower part of the crusher 3 is connected with the screw machine 2;
referring to fig. 2, the weighing device 7 is composed of a weighing sensor 70, a vibrator 71, a pneumatic gate 72, a support frame 73, a hopper 74 and a dust cover 75, wherein three support frames 73 are provided for supporting the hopper 74, and three weighing sensors 70 are provided at three support points; a dust cover 75 is arranged above the hopper 74, a pneumatic gate 72 is arranged at the outlet of the lower part of the hopper, and a vibrator 71 is arranged in the middle of the hopper body; a dust removal pipe 8 is arranged at an opening at the side edge of the dust cover 75 above the weighing device 7 and connected with a dust collector 9 for collecting raised dust in the lime water preparation process;
referring to fig. 3, the chemical drug mixer 11 and the Chinese drug dumping mixer 14 are characterized in that the motor 111 is mounted inside the bracket 118 through the fixed base plate 117, and the driving pulley 112 is disposed on the output shaft of the motor 111; the stirring paddle 115 is welded on one end of the driven shaft 114, the other end of the driven shaft 114 is embedded into the driven belt pulley 113, the middle of the driven shaft is connected with the driving belt pulley 112 and the driven belt pulley 113 through the transmission belt 116, and the control on the starting, the stopping and the speed of the stirrer can be completed by controlling the motor 111.
Referring to fig. 4, the automatic lime water configuration system further includes an electrical control system, and the electrical control system includes a PLC, a weighing sensor, a junction box, a weighing transmitter, an ultrasonic liquid level sensor, a frequency converter, a water pump, a transfer pump, a chemical discharge pump, a mixer, a plate turnover machine, a crusher, an electromagnetic valve, a pneumatic gate and a vibrator; the PLC receives and sends signals of the weighing sensor, the junction box, the weighing transmitter, the ultrasonic liquid level sensor, the frequency converter, the water pump, the transfer pump, the medicine discharge pump, the stirrer, the crusher and the plate turnover machine in a communication mode, and controls the actions of the electromagnetic valve, the pneumatic valve and the vibrator in a mode of sending switching value signals.
Referring to fig. 1, fig. 2, fig. 4, and fig. 5, the method of the present invention includes:
before starting up, firstly, parameters are set through a touch screen: starting a water pump 17 to replenish water when the liquid level of the chemical stirring barrel 11 is lower than 1 m, and stopping when the water level reaches 5 m; when the liquid level of the dump chemical bucket 15 is lower than 2 meters in the setting, starting a lime water configuration device to configure lime water, and stopping when 9 meters is reached; setting a transfer and storage medicine stirrer 14 for normal rotation to prevent lime water from precipitating; after touch screen parameters are set, the system is started by clicking, and automatically operates according to the following mode:
the PLC sends a starting signal to the frequency converter 6 after receiving a starting command, and the frequency converter 6 controls the transfer medicine storage stirrer 14 to rotate normally; meanwhile, the PLC reads the liquid level of lime water in the dumping chemical bucket 15 during real-time detection of the ultrasonic liquid level sensor 13, judges whether the liquid level is lower than 2 meters, if not, the PLC sends an instruction to the frequency converter 9, the frequency converter 9 starts the chemical discharging pump 19, and lime water is continuously added to the sewage pool 16; if yes, starting a lime water configuration system, wherein the detailed configuration process comprises the following steps:
a. reading the height of the liquid level of the chemical stirring barrel 12 detected by the ultrasonic liquid level sensor 10 through an RS485 communication mode by a PLC (programmable logic controller), judging whether the liquid level is lower than 1 meter, if so, sending a starting instruction to the frequency converter 7 by the PLC, starting the water pump 17 by the frequency converter 7, pumping water into the chemical stirring barrel 12 from the tap water tank 1 until the height of the liquid level in the chemical stirring barrel 12 reaches 3 meters, and stopping pumping water;
b. the PLC calculates the following according to the liquid level height before and after the chemical stirring barrel 12 is added with water, and the lime addition amount is obtained:
the ratio of lime to water required by the sewage treatment process in a factory is set as N/M, the radius of the chemical stirring barrel 12 is r:
by ultrasonic levelThe sensor 10 measures the height H of the chemical agent stirring barrel 12 before water is added1The height after adding water is H2Namely, the height of the newly added water in the chemical stirring barrel 12 is as follows:
H＝H2－H1
the volume of the water added into the chemical stirring barrel 12 is as follows:
V＝πr2H
the density of water at room temperature is 1kg/l, and the addition amount of water can be calculated as M1＝V×1kg/l
Then the corresponding amount of lime added can be calculated as:
N1＝M1×N/M
c. the PLC sends a starting signal to the frequency converter 1, the frequency converter 10 and the frequency converter 2, simultaneously starts the plate turnover machine 4, the crusher 3 and the screw machine 2, and feeds lime from the lime storage tank 5 to the crusher 3 for crushing and grinding through the rotation of the plate turnover machine 4, wherein the particle size of the powdery lime is controlled between 75 and 58 mu m; powdery lime is put into the screw machine 2, the lime is conveyed to the hopper weighing device 7 through the screw machine 2, the weight of the lime powder in the hopper 74 is detected in real time by the weighing sensor 70 in the hopper weighing device 7, the lime powder is sent to the PLC through the weighing transmitter through the junction box, and after the lime amount required to be added is reached, the PLC sends out an instruction again to stop the plate turnover machine 4, the crusher 3 and the screw machine 2; then the PLC sends a starting signal to the electromagnetic valve 11 and the electromagnetic valve 12, simultaneously opens the pneumatic gate 72 and the vibrator 71, puts all weighed lime into the chemical stirring barrel 12, simultaneously sends a starting signal to the frequency converter 4, controls the chemical stirring barrel 11 to operate and stir by the frequency converter 4, controls the stirring time to be 10-15 minutes, and finishes lime water preparation; the PLC sends a starting signal to the frequency converter 8, the frequency converter 8 starts the transfer pump 18, and the prepared lime water is conveyed from the chemical stirring barrel 12 to the intermediate storage and discharge chemical barrel 15 for temporary storage and standby;
the liquid level of the explosive barrel 15 is dumped in the real-time conveying of the ultrasonic liquid level sensor 13 and is given to the PLC, when the liquid level reaches 9 meters, the PLC gives an instruction again, the transfer pump 15 is stopped to convey lime water into the transfer explosive barrel 15, and a lime water configuration work cycle can be completed. When the sewage treatment needs dosing, the lime water is sent out by the lime water conveying pipe 23 by the dosing pump 19.
The above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (13)
1. An automatic lime water configuration system is characterized by comprising a tap water tank, a water pump, a chemical stirring barrel, a transfer pump, a middle-dump chemical barrel, a chemical discharge pump and a sewage tank which are sequentially communicated through pipelines; a chemical stirring machine is arranged in the chemical stirring barrel, and an ultrasonic liquid level sensor is arranged at the upper part of the chemical stirring machine; a middle drug storage and discharge barrel is internally provided with a middle drug storage and discharge stirrer, and the upper part of the middle drug storage and discharge barrel is provided with an ultrasonic liquid level sensor; a lime storage tank, a weighing device and a dust collector are sequentially arranged between the tap water tank and the chemical stirring barrel, a plate turnover machine is arranged at an outlet of the lower portion of the lime storage tank and connected with a crusher, an outlet of the crusher is connected with a screw machine, the screw machine is connected with the weighing device, and the system is controlled by an electric control system.
2. The automatic lime water configuration system of claim 1, wherein the weighing device comprises a support frame, a hopper supported by the support frame, a dust cover arranged above the hopper, a pneumatic gate arranged at an outlet at the lower part of the hopper, a vibrator arranged in the middle of a cavity of the hopper, and three weighing sensors arranged at three support points.
3. The automatic lime wash allocation system of claim 2, wherein a dust removal pipe is arranged at an opening at the side of the dust cover above the weighing device and connected with a dust collector for collecting lime dust escaping during the allocation of lime wash.
4. The lime water automatic configuration system of claim 1, wherein the chemical agent mixer and the chemical agent storage mixer are both composed of a fixed bracket, a fixed bottom plate fixed on one side of the fixed bracket, a motor fixedly connected to the fixed bottom plate, a driven belt pulley driven by the motor through a transmission belt, and a mixing slurry fixed on a driven shaft of the driven belt pulley.
5. The automatic lime water configuration system of claim 1, wherein the electronic control system comprises a PLC, a weighing sensor, a junction box, a weighing transmitter, an ultrasonic liquid level sensor, a frequency converter, a water pump, a transfer pump, a chemical discharge pump, a blender, a panel turnover machine, a screw machine, a crusher, a water pump, an electromagnetic valve, a pneumatic gate and a vibrator; the PLC receives and sends signals of the weighing sensor, the junction box, the weighing transmitter, the ultrasonic liquid level sensor, the frequency converter, the water pump, the transfer pump, the medicine discharge pump, the stirrer, the plate turnover machine, the screw machine and the crusher in a communication mode, and controls the actions of the electromagnetic valve, the pneumatic valve and the vibrator in a mode of sending switching value signals; and the PLC is connected with the touch screen in an RS232 communication mode.
6. A control method of an automatic lime water configuration system is characterized by comprising the following steps:
firstly, electrifying and starting a system;
secondly, the system sets that when the height of the liquid level of the chemical agent stirring barrel is lower than 1 meter, a water pump is started to replenish water, and when the height reaches 5 meters, the water replenishing is stopped; when the liquid level of the dumping chemical barrel is lower than 2 m in the setting, the lime water device is started to allocate lime water, and the operation is stopped when 9 m is reached;
the PLC reads the liquid level H of the lime water in the middle-dumping medicine barrel in real time through the ultrasonic liquid level sensort；
Fourth judgment liquid level Ht< 2 m? If not, opening a medicine discharge pump, and continuously adding lime water into the sewage pool; if yes, entering the next step;
fifthly, reading height H of liquid level of chemical stirring barrel by PLC through ultrasonic sensor1；
Sixthly, judging the height H of the liquid level1< 1 m? If yes, starting a transfer pump, and pumping lime water from the chemical stirring barrel to the transfer stirring barrel; if not, entering the next step;
sending a starting instruction to a seventh frequency converter by the PLC, starting a water pump by the seventh frequency converter to add water into the chemical stirring barrel, namely pumping water into the chemical stirring barrel from the industrial water pool until the liquid level in the chemical stirring barrel reaches 3 m, and stopping pumping water;
and (ii) determining the height H of the liquid level1≧ 3 m? If not, returning to step-quieting; if yes, entering the next step;
the self-supporting PLC reads the height H of the liquid level of the chemical stirring barrel in an RS485 communication mode2Calculating the weight N of lime to be added1；
The starting of the plate turnover machine, the crusher and the screw machine is required to convey lime to the weighing device until the weight of the lime on the weighing device reaches N1Then, stopping turning over the plate machine;
opening a pneumatic gate, starting a vibrator at the same time, sending all lime in the hopper into the chemical stirring barrel, and opening the chemical stirring machine to fully and uniformly stir;
and returning the step sixteenth and the step fifthly in the step order.
7. The method for controlling the automatic lime water configuration system according to claim 6, wherein the system is powered on and started, and the method further comprises: and the PLC sends a starting signal to the sixth frequency converter after receiving the starting command, and the sixth frequency converter controls the transfer medicine storage stirrer to normally rotate.
8. The method for controlling an automatic lime water distribution system according to claim 6, wherein the determination level H in step fourt< 2 m? Further comprising: the PLC reads the liquid level of lime water in a dumping medicine barrel during real-time detection of the second ultrasonic liquid level sensor, judges whether the liquid level is lower than 2 meters, and if not, the PLC sends an instruction to the ninth frequency converter, the ninth frequency converter starts a medicine discharging pump, and lime water is continuously added to the sewage pool; if yes, the lime water arrangement system is started.
9. The method for controlling the automatic lime water configuration system according to claim 6, characterized by the step of dividingHeight H of the liquid-break surface1< 1 m? Further comprising:
reading the height of the liquid level of the chemical stirring barrel detected by the first ultrasonic liquid level sensor through an RS485 communication mode by the PLC, judging whether the liquid level is lower than 1 meter, if so, sending a starting signal to the fourth frequency converter by the PLC, controlling the chemical stirring machine to operate and stir by the fourth frequency converter, controlling the stirring time to be 10-15 minutes, and completing the lime water preparation; the PLC sends a starting signal to the eighth frequency converter, the eighth frequency converter starts the transfer pump, and the prepared lime water is conveyed from the chemical mixing tank to the intermediate-dump chemical tank to be temporarily stored for later use.
10. The method for controlling an automatic lime wash configuration system according to claim 6, wherein the step of self-colouring comprises calculating the weight N of lime required to be added1Further comprising:
the PLC calculates the following according to the liquid level height before and after the chemical stirring barrel is read and added with water, and the lime addition amount is obtained:
setting the ratio of lime and water required by the sewage treatment process in a factory as N/M, and setting the radius of a chemical stirring barrel as r:
the height H of the chemical agent stirring barrel before water is added is measured by a first ultrasonic liquid level sensor1The height after adding water is H2Namely, the height of newly added water in the chemical stirring barrel is as follows:
H＝H2－H1
the volume of the water added in the chemical stirring barrel is as follows:
V＝πr2H
the density of water at normal temperature is 1kg/L, and the addition amount of water can be calculated as M1＝V×1kg/L
Then the corresponding amount of lime added can be calculated as:
N1＝M1×N/M。
11. the control method of the lime water automatic configuration system according to claim 6, characterized in that the steps are advantageously further comprised of: PLC sends start signal for first converter, tenth converter and second converter, start the panel turnover machine simultaneously, breaker and screw rod machine, rotate through the panel turnover machine and give the breaker from the unloading in the lime holding vessel, the screw rod machine is given in the unloading of rethread breaker, carry the hopper weighing device to lime by the screw rod machine, then the weight of lime in the hopper is detected out in real time by weighing sensor among the hopper weighing device, send PLC through the changer of weighing through the terminal box again, after reaching the volume of the lime that needs to add, PLC sends the instruction again and stops the panel turnover machine, breaker and screw rod machine.
12. The control method of the lime water automatic configuration system according to claim 6, wherein the step of circulating further comprises: PLC sends the enabling signal to first solenoid valve and second solenoid valve, opens pneumatic gate and vibrator simultaneously, puts into chemical mixing agitator all weighed lime.
13. The method for controlling an automatic lime water configuration system according to claim 6, wherein the step of pumping further comprises: the second ultrasonic liquid level sensor transmits the liquid level of the middle storage medicine barrel to the PLC in real time, when the liquid level reaches 9 m, the PLC sends out an instruction again, the middle transfer pump is stopped to convey lime water into the middle storage medicine barrel, and a lime water configuration working cycle can be completed; when the sewage treatment needs dosing, the lime water is delivered out by the lime water delivery pipe through the lime water delivery pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110059796.8A CN112957938A (en) | 2021-01-18 | 2021-01-18 | Automatic lime water configuration system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110059796.8A CN112957938A (en) | 2021-01-18 | 2021-01-18 | Automatic lime water configuration system and control method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103055757A (en) * | 2012-12-31 | 2013-04-24 | 天津市环境保护科学研究院 | Smart autocontrol lime addition device and addition method thereof |
| CN204911265U (en) * | 2015-09-22 | 2015-12-30 | 张家港市格锐环境工程有限公司 | Lime wash configuration system among sewage treatment |
| US20170240465A1 (en) * | 2014-09-30 | 2017-08-24 | Poju R. Stephansen As | Method for removal of grit in a slaker equipped with a grit collector |
| CN208791267U (en) * | 2018-04-13 | 2019-04-26 | 广东广业云硫矿业有限公司 | Lime automatic medicine adding apparatus in a kind of sewage disposal system |
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2021
- 2021-01-18 CN CN202110059796.8A patent/CN112957938A/en active Pending
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| CN103055757A (en) * | 2012-12-31 | 2013-04-24 | 天津市环境保护科学研究院 | Smart autocontrol lime addition device and addition method thereof |
| US20170240465A1 (en) * | 2014-09-30 | 2017-08-24 | Poju R. Stephansen As | Method for removal of grit in a slaker equipped with a grit collector |
| CN204911265U (en) * | 2015-09-22 | 2015-12-30 | 张家港市格锐环境工程有限公司 | Lime wash configuration system among sewage treatment |
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Application publication date: 20210615 |