CN111876792A - Automatic control method for generating hypochlorous acid water - Google Patents
Automatic control method for generating hypochlorous acid water Download PDFInfo
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- CN111876792A CN111876792A CN202010772546.4A CN202010772546A CN111876792A CN 111876792 A CN111876792 A CN 111876792A CN 202010772546 A CN202010772546 A CN 202010772546A CN 111876792 A CN111876792 A CN 111876792A
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Abstract
The invention discloses an automatic control method for generating hypochlorous acid water, which comprises the following steps: setting the concentration range of hypochlorous acid water, setting the first single longest generation time and the second single longest generation time, and activating to generate the hypochlorous acid water; obtaining a hypochlorous acid concentration value of the hypochlorous acid water, specifically comprising obtaining the hypochlorous acid concentration value of the hypochlorous acid water based on the real-time temperature value and the real-time flow value; and controlling the generation of hypochlorous acid water based on the hypochlorous acid concentration value timing single generation time. The invention sets differentiated electrolysis current and electrolysis time based on the collection, classification and calculation of real-time temperature values and real-time flow values so as to pertinently obtain and control the hypochlorous acid concentration, thereby improving the accuracy of concentration data collection, avoiding excessive generation of chlorine and improving the safety of users during use.
Description
Technical Field
The specification relates to the field of control, in particular to an automatic control method for generating hypochlorous acid water.
Background
With the increasing concern and focus on human health, hygiene and epidemic prevention, disinfectants have become essential household goods for people.
Hypochlorous acid water (hypochlorous acid water), refers to an aqueous solution of which the stock solution contains stable hypochlorous acid molecules. It is a novel high-efficiency disinfectant. Its advantages are broad spectrum, high killing power, high safety and high environmental protection.
At present, hypochlorous acid water is generated mostly in a mode of electrolyzing water, specifically, a mode of electrolyzing sodium chloride solution is adopted, and an anode reaction is carried out; cl ions lose electrons to generate chlorine, hydrogen ions are used as cathodes to obtain electrons to generate hydrogen, and the chlorine is combined with water to react as follows; H2O + Cl2 ═ HClO + HCl to give hypochlorous acid water. The obtained hypochlorous acid water can be directly used for disinfection of human or household environment.
However, it can be seen from the above that chlorine gas is generated in the electrolysis process, and part of the chlorine gas will not combine with water to generate hypochlorous acid, and if the concentration of the uncombined chlorine gas is too high, the uncombined chlorine gas will be stored in a container along with hypochlorous acid water or directly delivered to a user along with water flow, and when the user uses hypochlorous acid water, the user will inevitably contact with excessive chlorine gas, and certain harm will be caused to the health of the user, such as damage to the mucosa of eyes or respiratory tract. Therefore, how to automatically control the generation amount of the chlorine gas which is not combined with water in the process of generating hypochlorous acid water and ensure the safety of users under the use working conditions is an important subject to be researched.
Disclosure of Invention
An object of the embodiments of the present disclosure is to provide an automatic control method for generating hypochlorous acid water, which sets differentiated electrolysis current and electrolysis time based on the collection, classification and calculation of real-time temperature values and real-time flow values to obtain and control a specific hypochlorous acid concentration value in a targeted manner, and meanwhile, avoids excessive generation of chlorine gas, improves safety of a generation process, does not need a concentration sensor, improves accuracy of concentration data collection, and saves cost.
In order to achieve the above object, in one aspect, an embodiment of the present specification provides an automated control method for generating hypochlorous acid water, including:
setting a hypochlorous acid water concentration range, specifically comprising setting a first chloric acid concentration range and a second chloric acid concentration range of the hypochlorous acid water, wherein the minimum value of the first chloric acid concentration range is higher than the maximum value of the second chloric acid concentration range;
setting a first single longest generation time and a second single longest generation time, wherein the second single longest generation time is greater than the first single longest generation time;
activating to generate the hypochlorous acid water;
acquiring a hypochlorous acid concentration value of the hypochlorous acid water, specifically, acquiring a real-time flow value of the hypochlorous acid water, acquiring a real-time temperature value of the hypochlorous acid water, and acquiring the hypochlorous acid concentration value of the hypochlorous acid water based on the real-time temperature value and the real-time flow value;
timing a single generation time based on the hypochlorous acid concentration value, specifically including,
stopping generating hypochlorous acid water when the real-time hypochlorous acid concentration value is in the first chloric acid concentration range and the single generation time is equal to the first single longest generation time;
and when the real-time hypochlorous acid concentration value is in the range of the second chloric acid concentration, and the single generation time is equal to the second single longest generation time, stopping generating hypochlorous acid water, and keeping the state of stopping generating the hypochlorous acid water within a preset time, wherein the preset time is at least the second single longest generation time.
According to the technical scheme provided by the embodiment of the specification, the embodiment of the specification can accurately fit the electrolytic current by acquiring the flow value of hypochlorous acid water and the temperature value of hypochlorous acid water in real time, further accurately control the hypochlorous acid concentration value, avoid concentration measurement deviation caused by sensor aging or temperature and flow change due to adoption of a concentration sensor, and more importantly, the embodiment of the specification can accurately control the electrolytic current and the hypochlorous acid concentration value, combine with the differentiation of the hypochlorous acid concentration, adaptively adjust the generation time of hypochlorous acid water, and further avoid generating excessive chlorine, thereby reducing the contact risk of a user and excessive chlorine, and improving the use safety of the user.
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FIG. 1 is a schematic diagram of an automated method for controlling hypochlorous acid water production in accordance with certain embodiments of the present disclosure.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present specification, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only a part of the embodiments of the present specification, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments in the present specification without any inventive step should fall within the scope of protection of the present specification.
As shown in fig. 1, some embodiments of the present disclosure provide an automatic control method for generating hypochlorous acid water, which includes setting a hypochlorous acid water concentration range, specifically, setting a first chloric acid concentration range and a second chloric acid concentration range of the hypochlorous acid water, wherein a minimum value of the first chloric acid concentration range is higher than a maximum value of the second chloric acid concentration range, preferably, the first chloric acid concentration range is 120ppm to 180ppm, the second chloric acid concentration range is 50ppm to 119ppm, and the first chloric acid concentration range and the second chloric acid concentration range are set to ensure a disinfection effect without generating excessive chlorine gas. Setting a first single longest generation time and a second single longest generation time, wherein the second single longest generation time is greater than the first single longest generation time; the first single longest generation time is 15min, and the second single longest generation time is 30 min. Activating to generate the hypochlorous acid water; acquiring a hypochlorous acid concentration value of the hypochlorous acid water, specifically, acquiring a real-time flow value of the hypochlorous acid water, acquiring a real-time temperature value of the hypochlorous acid water, and acquiring the hypochlorous acid concentration value of the hypochlorous acid water based on the real-time temperature value and the real-time flow value; timing a single generation time based on the hypochlorous acid concentration value, specifically comprising, when the real-time hypochlorous acid concentration value is within the first chloric acid concentration range, the single generation time being equal to a first single maximum generation time, stopping generating hypochlorous acid water; and when the real-time hypochlorous acid concentration value is in the range of the second chloric acid concentration, and the single generation time is equal to the second single longest generation time, stopping generating hypochlorous acid water, and keeping the state of stopping generating the hypochlorous acid water within a preset time, wherein the preset time is at least the second single longest generation time.
In the related art, the concentration of hypochlorous acid generated is often detected by a concentration sensor during the generation of hypochlorous acid water, but the influence of environmental factors on the concentration sensor is huge, because the heat generation and the change of the electrolyte flow are accompanied in the electrolysis process, even if the same sensor is in the same electrolysis process, concentration measurement deviation is generated due to temperature fluctuation caused by heat or flow fluctuation caused by pressure, so that hypochlorous acid water with accurate concentration cannot be accurately obtained, and in addition, if a sensor device is aged or failed, the obtained concentration deviation of hypochlorous acid water is larger, so that the amount of chlorine generated at one time is more difficult to control, and in addition, in the generation process of hypochlorous acid water, the generated hypochlorous acid concentration is often a constant value in the generation time regardless of the generated hypochlorous acid water, this causes a problem that the total amount of chlorine gas generated increases when the hypochlorous acid concentration is high and the time is constant, and therefore, there is a risk that the amount of chlorine gas not combined with water is excessive, and even if the temperature correction function is provided to some concentration sensors, the correction effect is not significant.
Compared with the prior art, the temperature sensor and the flow sensor are more mature and are more suitable for the working condition of water electrolysis. In some embodiments of the present invention, based on the detection of real-time temperature and real-time flow rate, the electrolytic current can be accurately fitted, and based on the accurately fitted electrolytic current, the hypochlorous acid concentration range can be controlled to 120ppm to 180ppm of the first chloric acid concentration range and 50ppm to 119ppm of the second chloric acid concentration range, thereby ensuring the generation amount of chlorine gas in a single generation of hypochlorous acid water; further, the present invention differently sets the first single maximum generation time of 15min and the second single maximum generation time of 30min for the first chloric acid concentration range of 120ppm to 180ppm and the second chloric acid concentration range of 50ppm to 119ppm, thereby further ensuring that the total amount of chlorine generated is in a relatively stable and controllable range regardless of the concentration of hypochlorous acid water generated.
In some embodiments herein, a flow threshold is set, preferably 10L/min; setting a temperature threshold, wherein the temperature threshold is preferably 50 ℃; during electrolysis, based on the changes of flow and temperature, the following three conditions mainly exist:
a first working condition: the method comprises the following steps of setting a real-time electrolysis current value based on the real-time temperature value and the real-time flow value, and acquiring the hypochlorous acid concentration value based on the real-time electrolysis current value, wherein the method specifically comprises the following steps: when the real-time flow value is lower than the flow threshold value and the real-time temperature value is lower than the temperature threshold value, calculating a first electrolytic current value based on the real-time flow value and the real-time temperature value, and calculating a first chloric acid concentration value based on the first electrolytic current value;
the second working condition is as follows: when the real-time flow value is not lower than the flow threshold value and the real-time temperature value is lower than the temperature threshold value, or when the real-time flow value is lower than the flow threshold value and the real-time temperature value is not lower than the temperature threshold value, calculating a second electrolysis current value based on the flow threshold value and the real-time temperature value, or calculating a second electrolysis current value based on the real-time flow value and the temperature threshold value, and calculating a second chloric acid concentration value based on the second electrolysis current value;
the third working condition is as follows: when the real-time flow value is not lower than the flow threshold value and the real-time temperature value is not lower than the temperature threshold value, calculating a third electrolytic current value based on the flow threshold value and the temperature threshold value, and calculating a third chloric acid concentration value based on the third electrolytic current value;
the first electrolysis current value is greater than the second electrolysis current value, and the second electrolysis current value is greater than the third electrolysis current value; the first chloric acid concentration value is greater than the second chloric acid concentration value, which is greater than the third chloric acid concentration value.
In the related art, the electrolysis current tends to increase along with the increase of the flow and the temperature, and the safety is difficult to ensure, while the scheme is based on the double aspects of the safety and the electrolysis concentration, and the electrolysis current is set distinctively, which can be specifically explained in the following.
Specifically, the first working condition is explained as follows, the larger the flow rate is, the higher the temperature is, the more the amount of the chlorine gas which is not combined with water is, so that the corresponding flow threshold value of 10L/min and the temperature threshold value of 50 ℃ are set, when neither the real-time flow rate nor the real-time temperature exceeds the corresponding threshold value, the chlorine gas has sufficient time and sufficient solubility to dissolve in water, multiple experiments verify that the risk of excessive chlorine gas generation is extremely low, in order to take safety and hypochlorous acid water concentration into consideration, the electrolytic current value needs to be calculated by combining the real-time temperature and the real-time flow rate value, specifically, the electrolytic current value and the real-time temperature and the real-time flow rate have a negative correlation, under the working condition, the flow rate is smaller, when the temperature is lower, the electrolytic current is correspondingly larger, so that the safety is ensured, and the hypochlorous acid concentration is further constant.
Specifically explaining the second condition, when one of the real-time flow rate or the real-time temperature exceeds the corresponding threshold, the probability of chlorine excess will increase abruptly, and thus special treatment is required for the condition. Therefore, when the real-time temperature value is not lower than the temperature threshold value, the second electrolysis current value is calculated based on the temperature threshold value, namely, under the condition of higher temperature, the electrolysis current under the second working condition is reduced compared with the electrolysis current under the first working condition based on the negative correlation relation between the temperature and the electrolysis current, so that the generation amount of corresponding chlorine is reduced; in addition, when the real-time flow value is not lower than the flow threshold value, a second electrolytic current value is calculated based on the flow threshold value, namely, under the condition of higher flow, the electrolytic current under the second working condition is reduced compared with the electrolytic current under the first working condition based on the negative correlation relation between the flow and the electrolytic current, so that the generation amount of corresponding chlorine is also reduced;
likewise, the electrolysis current under the third working condition is the lowest, so that the corresponding generation amount of chlorine is further reduced, and the risk of excessive chlorine is reduced.
In some embodiments of the present description, a clamp current value is set; calculating the first, second and third chloric acid concentration values based on the first, second and third electrolysis current values, respectively, when the first, second and third electrolysis current values are all less than a clamp current value; when the electrolysis current value is not less than the clamp current value, the hypochlorous acid concentration value is calculated based on the clamp current value. This scheme prevents the situation that the electrolytic current suddenly increases due to a hardware failure, thereby causing a sharp increase in the amount of chlorine generation. This risk is eliminated after setting the clamp current.
In some embodiments of the present description, the electrolytic current is applied in an electrolyte between a first electrode and a second electrode, the first electrode and the second electrode comprising a lead dioxide electrode or a BDD electrode, or the first electrode is a tin dioxide electrode and the second electrode is a stainless steel electrode. The electrolyte comprises a sodium chloride solution, and the concentration of the sodium chloride solution is 10-15%. Multiple experiments prove that the electrolysis efficiency is higher when the concentration of the sodium chloride solution is between 10% and 15%.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method or device comprising the element.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the method embodiment, since it is substantially similar to the apparatus embodiment, the description is simple, and the relevant points can be referred to the partial description of the apparatus embodiment. The above description is only an example of the present specification, and is not intended to limit the present specification. Various modifications and alterations to this description will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present specification should be included in the scope of the claims of the present specification.
Claims (7)
1. An automatic control method for generating hypochlorous acid water is characterized in that,
setting a hypochlorous acid water concentration range, specifically comprising setting a first chloric acid concentration range and a second chloric acid concentration range of the hypochlorous acid water, wherein the minimum value of the first chloric acid concentration range is higher than the maximum value of the second chloric acid concentration range;
setting a first single longest generation time and a second single longest generation time, wherein the second single longest generation time is greater than the first single longest generation time;
activating to generate the hypochlorous acid water;
acquiring a hypochlorous acid concentration value of the hypochlorous acid water, specifically, acquiring a real-time flow value of the hypochlorous acid water, acquiring a real-time temperature value of the hypochlorous acid water, and acquiring the hypochlorous acid concentration value of the hypochlorous acid water based on the real-time temperature value and the real-time flow value;
timing a single generation time based on the hypochlorous acid concentration value, specifically including,
stopping generating hypochlorous acid water when the real-time hypochlorous acid concentration value is in the first chloric acid concentration range and the single generation time is equal to the first single longest generation time;
and when the real-time hypochlorous acid concentration value is in the range of the second chloric acid concentration, and the single generation time is equal to the second single longest generation time, stopping generating hypochlorous acid water, and keeping the state of stopping generating the hypochlorous acid water within a preset time, wherein the preset time is at least the second single longest generation time.
2. The method of claim 1, wherein the acid hypochlorous acid water is generated from a hydrogen hypochlorous acid water,
setting a flow threshold;
setting a temperature threshold;
the method comprises the following steps of setting a real-time electrolysis current value based on the real-time temperature value and the real-time flow value, and acquiring the hypochlorous acid concentration value based on the real-time electrolysis current value, wherein the method specifically comprises the following steps:
when the real-time flow value is lower than the flow threshold value and the real-time temperature value is lower than the temperature threshold value, calculating a first electrolytic current value based on the real-time flow value and the real-time temperature value, and calculating a first chloric acid concentration value based on the first electrolytic current value;
when the real-time flow value is not lower than the flow threshold value and the real-time temperature value is lower than the temperature threshold value, or when the real-time flow value is lower than the flow threshold value and the real-time temperature value is not lower than the temperature threshold value, calculating a second electrolysis current value based on the flow threshold value and the real-time temperature value, or calculating a second electrolysis current value based on the real-time flow value and the temperature threshold value, and calculating a second chloric acid concentration value based on the second electrolysis current value;
when the real-time flow value is not lower than the flow threshold value and the real-time temperature value is not lower than the temperature threshold value, calculating a third electrolytic current value based on the flow threshold value and the temperature threshold value, and calculating a third chloric acid concentration value based on the third electrolytic current value;
the first electrolysis current value is greater than the second electrolysis current value, and the second electrolysis current value is greater than the third electrolysis current value;
the first chloric acid concentration value is greater than the second chloric acid concentration value, which is greater than the third chloric acid concentration value.
3. The method of claim 2, wherein the acid hypochlorous acid water is generated from a hydrogen hypochlorous acid water,
setting a clamping current value;
calculating the first, second and third chloric acid concentration values based on the first, second and third electrolysis current values, respectively, when the first, second and third electrolysis current values are all less than a clamp current value;
when the electrolysis current value is not less than the clamp current value, the hypochlorous acid concentration value is calculated based on the clamp current value.
4. The method of claim 3, wherein the acid hypochlorous acid water is generated from the acid hypochlorous acid water,
the first chloric acid concentration is in the range of 120ppm to 180ppm,
the second chloric acid concentration ranges from 50ppm to 119 ppm.
5. The method of claim 4, wherein the acid hypochlorous acid water is generated from the acid hypochlorous acid water,
the first single maximum generation time is 15min,
the second single maximum generation time is 30 min.
6. The method of claim 5, wherein the acid hypochlorous acid water is generated from the acid hypochlorous acid water,
the electrolytic current is applied to the electrolyte between a first electrode and a second electrode, the first electrode and the second electrode comprise lead dioxide electrodes or BDD electrodes, or the first electrode is a tin dioxide electrode and the second electrode is a stainless steel electrode.
7. The method of claim 6, wherein the acid hypochlorous acid water production is controlled automatically,
the electrolyte comprises a sodium chloride solution, and the concentration of the sodium chloride solution is 10-15%.
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