CN113713702A - Intelligent fluid batching method - Google Patents
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Abstract
The invention discloses an intelligent fluid batching method, which comprises the following steps: the method comprises the following steps: preparing in an early stage; step two: establishing the maximum concentration value allowed by each raw material solution; step three: completing the dissolution of the raw materials; step four: and finishing the preparation of the mixed solution. The early preparation in the first step is to prepare solutions with different concentrations for each raw material, prepare solutions with the same raw material proportion but different total concentrations from mixed solutions, test the physicochemical characteristics of the solutions at different temperatures, record data and establish the corresponding relationship between the concentrations and the temperatures and the physicochemical characteristics of the solutions. The intelligent fluid batching method saves production space, saves fixed data investment, can realize on-line monitoring of the concentration and proportion of raw materials, intelligent batching and material supplementing, does not increase the aim of a dissolving tank under the condition of increasing product types, simplifies batching processes, and adapts to the intelligent production requirements.
Description
Technical Field
The invention relates to the technical field of intelligent fluid proportioning, in particular to an intelligent fluid proportioning method.
Background
In the field of chemical production, fluid compounding is one of the most common production processes. In general chemical enterprises, the batching process is not taken into consideration, is considered to be a process with low technical content, and has lower requirements on the quality of workers. But in practice the results of the ingredients often have a crucial influence on the quality of the product, and manually controlled ingredients are generally of poor batch consistency.
If the raw material is powder, granules or crystals, the traditional artificial batching method is as follows: directly putting each raw material into a respective buffer storage bin, then putting the buffer storage bin into a metering bin, and after accurate metering, putting all the raw materials into the same dissolving tank to be dissolved to obtain a mixed solution. But whether the dissolution is finished or not is difficult to judge, generally the dissolution time is controlled, the method is easy to lose effectiveness when the raw materials are caked, and after the dissolution, sampling is needed to detect whether the concentration of the solution reaches the qualified standard or not, if the concentration does not reach the requirement, the material is needed to be supplemented for dissolution again, the concentration of the solution is detected again, and the steps are repeated until the proportion of each raw material and the total concentration are in the qualified range.
If the raw material is fluid, directly pumping the raw material solution into a mixing tank through a pump, and metering the accumulated flow of each raw material solution by using a flowmeter;
the traditional dosing mode has the following defects:
1. if the raw materials are powder and need to be dissolved into solution, the field working condition of the burdening of workers is generally poor due to the influence of dust emission, and occupational diseases of the workers are easily caused; if the raw materials are easy to cause anaphylactic reaction or the raw materials cannot contact air, even if the raw materials are dangerous chemicals or have certain toxicity, the raw materials are not friendly to the health condition of workers in the batching process. Moreover, the manual batching process generally involves the sampling detection process, but the sampling is also influenced by the manipulation of quality control personnel, sampling points, sampling amount and external environment;
2. if the product is of various types, the number of the dissolving tanks is large, and the number of devices and equipment matched with the dissolving tanks is large, so that the investment of fixed assets is increased;
3. when the raw materials are granules, each dissolving tank corresponds to a plurality of unpacking and feeding devices, which not only occupies a large space, but also is very inconvenient for feeding and metering;
4. once the concentration and the proportion of each raw material are found to be not up to the standard after dissolution, the concentration and the proportion of each raw material need to be adjusted simultaneously is very difficult, field production workers have no ability to independently solve the problem, and the process of 'detection → feeding → re-detection → re-feeding' is repeated continuously with the participation of technicians in real time;
5. whether the dissolution is finished or not is difficult to judge, the dissolution time can be controlled only, and under the condition that raw materials are caked, the control method is invalid, so that the conditions that the real concentration is high and the detection concentration is low are caused, and the product quality is influenced;
6. the detection result cannot truly reflect the state of the raw material solution, because the temperature, humidity, pH and the like of the raw material solution on site may change along with the change of the sampling, conveying, detecting and detecting processes. Especially in summer and winter, the situation is very obvious, which leads to the same production process, and the product quality is different between summer and winter.
Therefore, we propose an intelligent dosing method for fluid in order to solve the problems set forth above.
Disclosure of Invention
The invention aims to provide an intelligent fluid proportioning method, which aims to solve the problems that whether the existing dissolving process is finished and how to judge, the scheme of optimally preparing a mixed solution, repeated detection and raw material supplement, different experimental working conditions of a production site and a detection room and different temperatures in different seasons cause inconsistent detection results with an actual site, which are provided by the background art.
In order to achieve the purpose, the invention provides the following technical scheme: an intelligent fluid dosing method, comprising the steps of:
the method comprises the following steps: preparing in an early stage;
step two: establishing the maximum concentration value allowed by each raw material solution;
step three: completing the dissolution of the raw materials;
step four: and finishing the preparation of the mixed solution.
Preferably, in the first step, the preparation in the early stage is to prepare solutions with different concentrations for each raw material, and the mixed solution is prepared into solutions with the same raw material proportion but different total concentrations, to test the physical and chemical properties of the solutions at different temperatures, to record data, and to establish the corresponding relationship between the concentration and the temperature and the physical and chemical properties thereof.
Preferably, the physicochemical characteristics of the solution comprise conductivity, ultrasonic impedance, density, spectrum, PH and the like, and parameters with the largest concentration correlation are selected for measurement and recording.
Preferably, the corresponding relation is written into a PLC (programmable logic controller) or a touch screen or an instrument, and is assisted by corresponding logic control to call a production process, and meanwhile, the input and output display of the touch screen, the real-time control of switching value analog quantity and communication equipment, the output of a batching result and the like are realized;
the logic control comprises the starting and stopping of the pump, the opening and closing of a valve, the real-time monitoring of analog quantity, internal calculation and conversion and the like.
Preferably, the method for establishing the maximum concentration value allowed by each raw material solution in the step two is to obtain the concentration value and the physicochemical characteristic value of the saturated solution of each raw material at high temperature and low temperature under the production working condition through the data corresponding relationship in the step one, and to use the concentration value corresponding to the minimum saturation value at different temperatures as a reference, and to use the concentration value not exceeding 95% of the reference concentration as the maximum concentration of the raw material solution.
Preferably, the dissolving of each raw material in the third step comprises the following steps:
step 1: inputting the number of bags for feeding, target temperature and target concentration from a touch screen, calculating the approximate pure water demand by a system, metering by a flowmeter, adding water to ensure that raw materials are dissolved sufficiently, and simultaneously enabling the fed materials to be in an excessive state;
step 2: in the dissolving process, the physicochemical characteristics of the raw materials are monitored, and when the physicochemical characteristics are continuously changed, the dissolving process is indicated; when the physicochemical characteristics are unchanged and deviate from the target concentration value, the fact that the dissolution is finished but water needs to be supplemented is indicated; when the physicochemical characteristics are unchanged and the concentration is in a target range, the completion of the dissolution is indicated, and the concentration is qualified;
and step 3: and the concentration is qualified, and the real total added water amount, the final concentration value and the volume or quality of the solution are displayed on a touch screen.
Preferably, the automatic logic control method for water supplement in step 2 is as follows:
and 4, step 4: reversely calculating the real concentration according to the corresponding relation of the data in the first step;
and 5: calculating the real feeding amount according to the real water adding amount;
step 6: calculating the real pure water demand according to the real feed amount;
and 7: and (4) deducting the added pure water amount from the real pure water demand amount to obtain the pure water amount to be supplemented, wherein the actual water supplement amount is slightly smaller than the water supplement amount to be supplemented, so that the input raw materials are always in a slightly excessive state, and repeating the steps 4-7 continuously until the concentration is qualified, wherein the repeating process is automatically completed by the system.
Preferably, the preparation of the mixed solution in the fourth step comprises the following steps:
and 8: inputting parameters such as total concentration, raw material proportion, volume and temperature of a mixed solution to be prepared through a touch screen, automatically calculating the required amount of each raw material solution and a solvent according to the corresponding relation by the system, automatically opening related valves through logic control, and starting corresponding peripheral hardware such as a pump;
and step 9: after the materials are uniformly mixed after being added, the system can automatically calculate the percentage of each raw material according to the real flow, converts the physicochemical characteristics of the mixed solution monitored in real time into corresponding concentration values, and then automatically judges whether the parameters reach the target value range.
Preferably, if the parameters in the step 9 exceed the range, automatic feeding is required, wherein the feeding process is spontaneously completed by the system until the parameters are qualified, and the parameters such as the real feeding amount, the percentage ratio of the raw materials, the total concentration and the like are displayed on the touch screen.
Compared with the prior art, the invention has the beneficial effects that: the intelligent fluid batching method;
1. a buffer storage bin and a metering bin in the batching process are eliminated, so that the production space is saved, and meanwhile, the fixed data investment is saved;
2. the concentration and proportion of raw materials are monitored on line, the materials are intelligently proportioned and supplemented, the process of repeated detection and supplement is cancelled, and the batching result under the real working condition is given, which is not the result detected by a physical and chemical method under the unreal working condition in a laboratory;
3. the one-to-many process is realized: no matter how many products exist, wherein the proportion of each raw material is small, the quantity of the dissolving tanks is the same as the quantity of the raw material types, and the aim of not increasing the quantity of the dissolving tanks under the condition of increasing the product types is fulfilled;
4. the participation of technicians is reduced, the product quality is stabilized, the batching process is simplified, the operation cost is saved, and intelligent control is realized;
5. promote the intelligent development of chemical industry, adapt to intelligent production demand.
Drawings
FIG. 1 is a schematic diagram showing the comparison of the temperature and density of the solution in NiSO4 solution with the concentration of Ni element;
FIG. 2 is a schematic diagram showing the temperature, density and Co element concentration of a CoSO4 solution according to the present invention;
FIG. 3 is a schematic diagram showing the comparison of the solution temperature, density and Mn element concentration in the MnSO4 solution of the present invention;
FIG. 4 is a schematic diagram showing the comparison of the temperature and density of the mixed solution of the present invention with the total concentration of elements.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: an intelligent fluid batching method comprises the following steps:
1. and (5) preparing in the early stage.
Preparing solutions with different concentrations for each raw material, preparing the mixed solution into solutions with the same raw material proportion but different total concentrations, testing physicochemical characteristics of the solutions at different temperatures, such as conductivity, ultrasonic acoustic impedance, density, spectrum, PH and the like, selecting a parameter with the maximum correlation with the concentration as long as the selected physicochemical characteristic parameter has correlation with the concentration, measuring, recording data, and establishing a corresponding relation between the concentration and the temperature and the physicochemical characteristics thereof, wherein the corresponding relation has no specific form, and only needs that the regression coefficient and the precision can meet the production requirements.
Writing the corresponding relation into a PLC (programmable logic controller) or a touch screen or an instrument, and assisting corresponding logic control, such as starting and stopping of a pump, opening and closing of a valve, real-time monitoring of analog quantity, internal calculation and conversion and the like, so as to call a production process, and input and output display of the touch screen, real-time control of switching quantity analog quantity and communication equipment, output of a batching result and the like are realized;
the corresponding relation between the concentration, the temperature and the physical and chemical characteristic parameters is written into the PLC, the touch screen or the instrument, and the corresponding relation can be written into corresponding parts of the PLC, the touch screen and the instrument, is not limited to the devices, and can be written into a part of each hardware or any other hardware device capable of communicating.
2. The maximum concentration value allowed for each raw material solution was established.
According to the data obtained in the step 1, the concentration value and the physicochemical characteristic value of the high-temperature and low-temperature saturated solution of each raw material under the production working condition can be obtained, the concentration value corresponding to the minimum saturation value at different temperatures is taken as a reference, and the maximum concentration of the raw material solution in the production workshop is not more than 95% of the reference concentration.
3. The dissolution of each raw material was completed.
The number of bags for feeding, the target temperature and the target concentration are input from the touch screen, the system can calculate the approximate pure water demand and measure the pure water demand by using a flowmeter, water is added to ensure that the raw materials are dissolved sufficiently, and the fed materials are in an excessive state. In the dissolving process, the physicochemical characteristics of the raw materials are monitored in real time, and when the physicochemical characteristics continuously change, the dissolving process is indicated; when the physicochemical characteristics are unchanged and deviate from the target concentration value, the fact that the dissolution is finished but water needs to be supplemented is indicated; when the physicochemical characteristics are unchanged and the concentration is in the target range, the completion of the dissolution is indicated and the concentration is qualified. Because the input raw materials are excessive, the system can automatically judge whether the concentration is higher than a qualified range, and automatically replenish water when the concentration exceeds the qualified range, and the logic control is as follows: calculating the real concentration reversely by the scheme of the step 1; secondly, calculating the real feeding amount according to the real water adding amount; calculating the real pure water demand according to the real feeding amount; and fourthly, deducting the added pure water amount by the pure water demand amount of the real material, namely the pure water amount to be added, wherein the actual water adding amount is slightly smaller than the water adding amount to be added, so that the input raw material is always in a slightly excessive state, repeating the four steps until the concentration is qualified, and displaying the real total water adding amount, the final concentration value and the volume or quality of the solution on a touch screen. The whole process is automatically finished in a system except that manual participation is carried out when feeding and touch screen input are carried out. Dissolving each raw material into a target concentration range according to the method;
wherein the raw material feeding process does not require metering, but provides the amount of the raw material in a packaged form, such as 10 bags of raw material per 500 KG/bag, to the control system, the packaged form of the raw material including but not limited to these packaged forms: 25 KG/bag, 50 KG/bag, 100 KG/bag, 500 KG/bag, 1000 KG/bag, 25 KG/bucket, 50 KG/bucket, 100 KG/bucket.
4. Completing the preparation of the mixed solution
The total concentration of the mixed solution to be prepared, the proportion of each raw material, the volume, the temperature and other parameters are input through a touch screen, the system can automatically calculate the required amount of each raw material solution and the solvent, related valves are automatically opened, and corresponding peripheral hardware such as pumps is started. After the materials are uniformly mixed after being added, the system can automatically calculate the percentage of each raw material according to the real flow, convert the physicochemical characteristics of the mixed solution monitored in real time into corresponding concentration values, and automatically judge whether the parameters reach the target value range. If the material is required to be automatically supplemented beyond the range, the material supplementing process is spontaneously completed by the system until the material is qualified, parameters such as the real material adding amount, the percentage proportion of raw materials, the total concentration and the like are displayed on the touch screen, and the material supplementing result is displayed on the touch screen, not only comprises the monitoring values of relevant equipment, but also comprises parameter values which are internally calculated and converted, including but not limited to the concentration, the material ratio and the like.
Example (b):
in the lithium ion battery industry, in the precursor production process of the ternary cathode material, NiSO4 & 6H2O, CoSO4 & 7H2O and MnSO4 & H2O are required to be used for preparing a mixed solution with the temperature of 45 ℃ of 50 +/-2 m3, so that the molar ratio of Ni, Co and Mn in the mixed solution is (5 +/-0.05): (2 ± 0.02): (3 +/-0.03), wherein the total concentration of the Ni, Co and Mn elements is 120 +/-0.5 g/l, and the method comprises the following steps:
1. the dissolution of NiSO4 & 6H2O and CoSO4 & 7H2O is an endothermic process, the saturation degree increases along with the increase of the temperature, in the saturated solution of NiSO4 & 6H2O in winter, the concentration of Ni can reach 145g/l, and 90 percent of Ni is 130 g/l; in a saturated solution of CoSO4 & 7H2O, the concentration of Co can reach 143g/l, and 90 percent of Co is 128 g/l. The dissolution of MnSO4 & H2O is an exothermic process, the saturation degree is reduced along with the temperature rise, the concentration of Mn in the saturated solution of the Xiaji MnSO4 & H2O can reach 165g/l, and 80 percent of Mn is 135 g/l;
2. preparing a series of NiSO4 solutions with different concentrations, and measuring the temperature (t, DEG C) of the solutions, the mass-volume concentration (c, g/l) and the density (rho, g/cm3), and recording the results as shown in the following Table 1 and figure 1;
3. NiSO4 solution with a temperature of 45 ℃ of 50 +/-2 m3 is prepared by NiSO4 & 6H2O, so that the concentration of the Ni element is 130 +/-0.3 g/l. The temperature, volume and concentration requirements of a target nickel sulfate solution are input through a touch screen, and the system prompts that 37200KG of pure water and 30 ton bags of NiSO4 & 6H2O can be pumped. ② after adding 37190KG pure water and 30 ton bags of NiSO 4.6H2O to dissolve, controlling the temperature at 45 ℃, the density 1.3216g/cm3 measured by the densimeter is converted into 130.71 g/l. Thirdly, the system judges that the concentration of the real material is not in the range of the target value of 130 +/-0.3 g/l and water needs to be supplemented. The system calculates that the mass of the NiSO4 & 6H2O added into the real material is 29566KG, the actually required pure water amount is 37452KG, and the material required to be supplemented is 37452 & 37190 & 262 KG. After the 260KG automatic water replenishing, converting the density 1.3202g/cm3 measured by a densimeter into 130.11g/l, and completing the dissolution of NiSO 4.6H 2O, wherein the total volume is 50.8m3 within the range of a target value of 130 +/-0.3 g/l;
4. preparing a series of CoSO4 solutions with different concentrations, and measuring the temperature (t, DEG C) of the solutions, the mass-volume concentration (c, g/l) and the density (rho, g/cm3), and recording the results as shown in the following Table 2 and FIG. 2;
5. a CoSO4 solution at 45 ℃ was prepared from CoSO4 & 7H2O at 50. + -. 2m3, so that the concentration of Co element was 128. + -. 0.3 g/l. The temperature, volume and concentration requirements of a target cobalt sulfate solution are input through a touch screen, and the system prompts that 35091KG pure water and CoSO4 & 7H2O of 31 ton bags can be pumped. ② after adding 35090KG pure water and 31 ton bags CoSO 4.7H 2O to dissolve, controlling the temperature at 45 ℃, the density measured by the densimeter is 1.3088g/cm3 and the converted concentration is 128.75 g/l. Thirdly, the system judges that the concentration of the real material is not in the range of the target value of 128 +/-0.3 g/l and water needs to be supplemented. The system calculates that the mass of CoSO4 & 7H2O added into the real material is 31019.4KG, the actually required pure water amount is 35373.2KG, and the required supplementary material is 35373.2-35090-283.2 KG. After 283KG of automatic water replenishing, the density measured by a densimeter is 1.3069g/cm3, the converted concentration is 127.93g/l, the total volume is 50.8m3 within the range of a target value of 128 +/-0.3 g/l, and the dissolution of CoSO4 & 7H2O is completed.
6. Preparing a series of MnSO4 solutions with different concentrations, measuring the temperature (t, DEG C) of the solutions, the mass volume concentration (c, g/l) and the density (rho, g/cm3), and recording the results as shown in the following table 3 and figure 3;
7. MnSO4 solution with the temperature of 45 ℃ is prepared by MnSO4 & H2O to be 50 +/-2 m3, so that the concentration of Mn element is 135 +/-0.3 g/l. Firstly, the temperature, volume and concentration requirements of a target manganese sulfate solution are input through a touch screen, and the system prompts that 45389KG of pure water and 21 ton bags of MnSO 4. H2O can be pumped. ② after adding 45388KG pure water and 21 ton bags of MnSO 4. H2O to dissolve, controlling the temperature at 45 ℃, the density 1.3201g/cm3 measured by the densimeter is converted into 135.81 g/l. Thirdly, the system judges that the concentration of the real material is not in the range of the target value of 135 +/-0.3 g/l and water needs to be supplemented. The system calculates that the mass of MnSO4 & H2O added into the real material is 21015.7KG, the actually required pure water amount is 45683.1KG, and the required supplementary material is 45683.1-45388-295.1 KG. Fourthly, after 295KG automatic water replenishing, the density measured by a densimeter of 1.3182g/cm3 is converted into the concentration of 134.96g/l, the total volume is 50.6m3 within the range of a target value of 135 +/-0.3 g/l, and the dissolution of MnSO 4. H2O is completed.
8. Preparing a series of mixed solutions of nickel sulfate, cobalt sulfate and manganese sulfate with different total concentrations but a molar ratio of Ni, Co and Mn being 5:2:3, measuring the temperature (t, DEG C) of the solutions, the mass volume concentration (c, g/l) and the density (rho, g/cm3), and recording the results as shown in the following table 4 and figure 4;
9. preparing a nickel-cobalt-manganese mixed solution with a total concentration of 120 +/-0.3 g/l of 50 +/-2 m3 by using the nickel sulfate solution prepared in the step 3, the cobalt sulfate solution prepared in the step 5, the manganese sulfate solution prepared in the step 7 and pure water, wherein the molar ratio of nickel, cobalt and manganese is (5 +/-0.01): (2 +/-0.01): (3 +/-0.01). Automatically acquiring the concentration converted by the density of each solution through a densimeter, wherein the concentration of Ni in a nickel sulfate solution is 130.11g/l, the concentration of Co in a cobalt sulfate solution is 127.93g/l, and the concentration of Mn in a manganese sulfate solution is 134.96 g/l; secondly, inputting the requirements of temperature, volume, molar ratio, total concentration and the like of the target mixed solution through a touch screen, and prompting a system to pump 23489.1L of nickel sulfate solution, 9594.8L of cobalt sulfate solution, 12717.6L of manganese sulfate solution and 4282.9L of pure water; the actual pumping amount of each raw material solution and pure water is 23541L of nickel sulfate solution, 9602L of cobalt sulfate solution, 12660L of manganese sulfate solution and 4280L of pure water respectively; fourthly, after the mixing is finished, the density value 1.2931g/cm3 monitored by the system is converted into the total concentration of 120.75g/cm3, the density value is automatically judged to be out of the range of the target value 120 +/-0.3 g/g, the molar ratio of nickel, cobalt and manganese is 5.012: 2.002: 2.987, the requirement is not met, and the material needs to be supplemented again; automatically checking by the system to calculate 13.99L of cobalt sulfate solution, 85.75L of manganese sulfate solution and 12.36L of pure water; the feeding condition is as follows: 14L of cobalt sulfate solution, 85L of manganese sulfate solution and 12L of pure water; seventhly, after feeding is finished, converting the density value of 1.2912g/cm3 monitored by the system into a total concentration of 119.94g/l, and enabling the molar ratio of nickel, cobalt and manganese to be 5:2:3, the total volume is 50.1m3, all indexes are in qualified ranges, and the preparation of the mixed solution is completed.
Those not described in detail in this specification are within the skill of the art. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (9)
1. An intelligent fluid batching method is characterized in that: the intelligent batching method comprises the following steps:
the method comprises the following steps: preparing in an early stage;
step two: establishing the maximum concentration value allowed by each raw material solution;
step three: completing the dissolution of the raw materials;
step four: and finishing the preparation of the mixed solution.
2. The intelligent fluid dosing method according to claim 1, wherein: the early preparation in the first step is to prepare solutions with different concentrations for each raw material, prepare solutions with the same raw material proportion but different total concentrations from mixed solutions, test the physicochemical characteristics of the solutions at different temperatures, record data and establish the corresponding relationship between the concentrations and the temperatures and the physicochemical characteristics of the solutions.
3. The intelligent fluid dosing method according to claim 2, wherein: the physicochemical characteristics of the solution include but are not limited to conductivity, ultrasonic impedance, density, spectrum, PH and the like, and parameters with the largest concentration correlation are selected for measurement and recording.
4. The intelligent fluid dosing method according to claim 2, wherein: the corresponding relation is written into a PLC (programmable logic controller) or a touch screen or an instrument, and is assisted with corresponding logic control so as to call a production process, and meanwhile, the input and output display of the touch screen, the real-time control of switching value, analog quantity and communication equipment, the output of a batching result and the like are realized;
the logic control comprises the starting and stopping of the pump, the opening and closing of a valve, the real-time monitoring of analog quantity, internal calculation and conversion and the like.
5. The intelligent fluid dosing method according to claim 1, wherein: and in the second step, establishing a data corresponding relation to obtain the concentration value and the physicochemical characteristic value of the high-temperature and low-temperature saturated solution of each raw material under the production working condition by establishing the data corresponding relation in the first step, taking the concentration value corresponding to the minimum saturation value at different temperatures as a reference, and taking the concentration value not exceeding 95% of the reference concentration as the maximum concentration of the raw material solution.
6. The intelligent fluid dosing method according to claim 1, wherein: in the third step, the step of completing the dissolution of the raw materials comprises the following steps:
step 1: inputting the number of bags for feeding, target temperature and target concentration through a touch screen, calculating the approximate pure water demand by a system, metering by a flowmeter, ensuring that the water adding amount is enough to dissolve raw materials, and simultaneously enabling the fed materials to be in an excessive state;
step 2: in the dissolving process, the physicochemical characteristics of the raw materials are monitored in real time, and when the physicochemical characteristics continuously change, the dissolving process is indicated; when the physicochemical characteristics are unchanged and deviate from the target concentration value, the fact that the dissolution is finished but water needs to be supplemented is indicated; when the physicochemical characteristics are unchanged and the concentration is in a target range, the completion of the dissolution is indicated, and the concentration is qualified;
and step 3: and the concentration is qualified, and the real total added water amount, the final concentration value and the volume or quality of the solution are displayed on a touch screen.
7. The intelligent fluid dosing method according to claim 6, wherein: the automatic logic control method for water supplement in the step 2 comprises the following steps:
and 4, step 4: reversely calculating the real concentration according to the corresponding relation of the data in the first step;
and 5: calculating the real feeding amount according to the real water adding amount;
step 6: calculating the real pure water demand according to the real feed amount;
and 7: and (4) deducting the added pure water amount from the real pure water demand amount to obtain the pure water amount to be supplemented, wherein the actual water supplement amount is slightly smaller than the water supplement amount to be supplemented, so that the input raw materials are always in a slightly excessive state, and repeating the steps 4-7 continuously until the concentration is qualified, wherein the repeating process is automatically completed by the system.
8. The intelligent fluid dosing method according to claim 1, wherein: the preparation of the mixed solution in the fourth step comprises the following steps:
and 8: inputting parameters such as total concentration, raw material proportion, volume and temperature of a mixed solution to be prepared through a touch screen, automatically calculating the required amount of each raw material solution and a solvent according to the corresponding relation by the system, automatically opening related valves through logic control, and starting corresponding peripheral hardware such as a pump;
and step 9: after the materials are uniformly mixed after being added, the system can automatically calculate the percentage of each raw material according to the real flow, converts the physicochemical characteristics of the mixed solution monitored in real time into corresponding concentration values, and then automatically judges whether the parameters reach the target value range.
9. The intelligent fluid dosing method according to claim 8, wherein: and if the parameters in the step 9 exceed the range, automatic material supplement is needed, wherein the material supplement process is spontaneously completed by the system until the parameters are qualified, and final parameters such as the real material supplement amount, the percentage proportion of the raw materials, the total concentration and the like are displayed on the touch screen.
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| CN111167325A (en) * | 2020-01-19 | 2020-05-19 | 防灾科技学院 | Control method for manufacturing constant value ternary mixed standard gas |
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