Rapid determination method for gas supply concentration of ozone generator

Abstract

The invention discloses a method for rapidly measuring the gas supply concentration of an ozone generator, which comprises the following steps: carrying out a verification experiment, and determining that the concentration of a dye solution is in direct proportion to the ozone aeration decoloration time in a certain concentration range; under the appropriate dye concentration, a standard curve of the reciprocal of the decoloration time and the aeration ozone concentration is drawn for on-site rapid testing, and the appropriate dye concentration refers to the dye concentration capable of guaranteeing rapid determination and precision within a certain range of the decoloration time; dissolving the solid dye with specific mass into a dye solution with specified concentration in a reaction container; starting aeration timing from the ozone gas, and reading the decoloration time; obtaining the ozone supply concentration according to the standard curve; reading the gas flow meter to obtain the ozone yield. Compared with a traditional iodometric method, the method has the advantages that the test conditions are simple, and the used dye is nontoxic, harmless, green, environment-friendly, easy to purchase, low in price and low in test cost; the concentration and the quality of the ozone generated by the ozone generator can be measured within several minutes, the measurement precision is high, and the test analysis error can be completely controlled within 1% according to the practical example.

Description

Technical Field

[0001] The invention belongs to the technical field of measuring the concentration of ozone generator gas supply, and particularly relates to a method for quickly measuring the concentration of ozone generator gas supply. Background Art

[0002] The iodine titration method is commonly used to measure the concentration of ozone generator supply gas. Although a relatively simple chemical analysis method, the iodine titration method still requires conventional analytical glassware such as conical flasks, burettes, graduated pipettes, and volumetric flasks. It also requires the pre-preparation of potassium iodide solution and sodium thiosulfate standard solutions, making it time-consuming and labor-intensive, and difficult to adapt to real-time operating conditions. Literature indicates that common water-soluble dyes can be decolorized by ozone oxidation, with a distinct endpoint. This mechanism is similar to the endpoint indicator used in titration in chemical analysis. The time required to reach the endpoint indicates the equivalent amount of ozone required to oxidize the dye and destroy the chromogenic functional groups. The decolorization time is then measured to determine the amount of ozone present. Theoretically, the reactants in the oxidation reaction that destroys the chromogenic functional groups of the dye molecule are equivalent, meaning that the amount of ozone consumed is proportional to the amount of dye. In practice, when reaction conditions remain stable, the amount of ozone required is generally proportional to the dye concentration.

[0003] At present, the chemical analysis conditions at the production site are poor, and analysis and testing are difficult, which cannot simultaneously meet the requirements of timely adjustment of the working conditions of the reactor or ozone generator. Summary of the Invention

[0004] In view of this, the object of the present invention is to provide a method for quickly measuring the concentration of gas supplied by an ozone generator to address the deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention is achieved through the following technical solutions:

[0006] A method for quickly determining the concentration of ozone generator supply gas is provided, comprising:

[0007] Verification experiments were conducted to establish that within a certain range of air supply ozone concentration, the concentration of the dye solution is directly proportional to the ozone aeration decolorization time;

[0008] At the appropriate dye concentration, a standard curve of the inverse of the decolorization time and the aeration ozone concentration is drawn for rapid on-site testing. The appropriate dye concentration refers to the dye concentration that can ensure that the decolorization time can be quickly measured within a certain range and with guaranteed accuracy.

[0009] A specific mass of the solid dye is dissolved in a reaction container to form a dye solution of a specified concentration;

[0010] Start the aeration of ozone gas and read the decolorization time;

[0011] The ozone supply concentration is obtained according to the above standard curve;

[0012] Read the gas flow meter to obtain the ozone production.

[0013] As described in the method for rapidly determining the gas supply concentration of the ozone generator, when drawing a standard curve of the inverse of the decolorization time and the aeration ozone concentration, a small ozone generator is used, and the ozone volume is precisely adjusted to 1.00 L / min. The ozone concentration is roughly controlled by adjusting the generator current adjustment knob. The concentration of the dye used for measurement is 150 mg / L. After the operating conditions are stable and the decolorization time is measured, the ozone concentration is accurately calibrated using the iodine titration method to obtain a linear standard curve of ozone concentration and the inverse of the decolorization time.

[0014] As described in the method for rapidly determining the concentration of the ozone generator supply gas, the dye used is acid blue R dye.

[0015] As described in the method for rapid determination of the concentration of the ozone generator supply gas, the decolorization time at an appropriate dye concentration is 10-600s.

[0016] The beneficial effects of the technical solution of the present invention are:

[0017] Compared with the traditional iodine titration method, the testing conditions of this method are very simple. The dyes used are non-toxic, harmless, green and environmentally friendly, easy to purchase, inexpensive, and have low testing costs. Within a few minutes, the concentration and quality of ozone produced by the ozone generator can be measured with high measurement accuracy. Practical examples show that the test analysis error can be completely controlled within 1%. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To further illustrate the above-mentioned objectives, structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a graph showing the relationship between decolorization time and dye concentration in a preferred embodiment of the present invention;

[0020] Figure 2 This is a standard curve diagram of the decolorization time inverse and ozone concentration in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0021] The terms "invention," "present invention," and "the present invention" as used in this specification are intended to refer broadly to all subject matter of this specification and any patent claims that follow. Statements containing these terms should not be construed to limit the subject matter described herein or to limit the meaning or scope of any patent claim that follows. Furthermore, this specification does not attempt to describe or limit the subject matter covered by any claim of any particular component, paragraph, statement, or figure of this application. The subject matter should be understood with reference to the entire specification, all drawings, and any claims that follow. The invention may have other embodiments and be practiced or implemented in other ways. Furthermore, it should be understood that the phraseology and terminology employed herein are for illustrative purposes only and should not be considered limiting.

[0022] The details of the present invention will now be discussed with reference to the accompanying drawings which illustrate the present invention by way of example only. In the accompanying drawings, similar features or components may be marked with the same reference numerals.

[0023] The use of "including," "having," and "comprising" and variations thereof herein is intended to encompass the items listed thereafter and equivalents thereof and additional items. Although reference may be made to directions such as above, below, upward, downward, rearward, bottom, top, front, and rear in describing the drawings, for convenience, reference is made relative to the drawings. These directions are not intended to literally define or limit the present invention in any manner. Furthermore, terms such as "first," "second," and "third" are used herein for descriptive purposes and are not intended to indicate or imply importance or significance.

[0024] The method for rapidly measuring the supply air concentration of an ozone generator of the present invention comprises: conducting a verification experiment to establish that within a certain supply air concentration range, the concentration of a dye solution is proportional to the ozone aeration decolorization time; plotting a standard curve of the inverse of the decolorization time and the aeration ozone concentration at an appropriate dye concentration for use in on-site rapid testing, wherein the appropriate dye concentration refers to a dye concentration that can ensure that the decolorization time can be rapidly measured within a certain range and with guaranteed accuracy; dissolving a specific mass of the above-mentioned solid dye in a reaction container to form a dye solution of a specified concentration; timing the decolorization time from the start of ozone gas aeration; obtaining the ozone supply air concentration based on the standard curve; and obtaining the ozone output by reading a gas flow meter.

[0025] The method of the present invention first requires validation experiments to establish that, within a certain range of air supply concentrations, the concentration of a particular dye solution is directly proportional to the ozone aeration decolorization time, thereby proving that the decolorization time can represent the amount of aerated ozone. Subsequently, at an appropriate dye concentration, a standard curve is plotted, comparing the inverse of the decolorization time to the aerated ozone concentration, for rapid on-site testing. The appropriate dye concentration ensures that the decolorization time is within a certain range, allowing for both rapid measurement and accuracy. Based on the human eye's motion resolution of 0.1 second, this time range should ideally be between 10 and 600 seconds. The ratio of ozone generated by dissolved oxidized dye molecules to the amount of aerated ozone is significantly influenced by factors such as the size and number of bubbles generated by the aeration device, the depth of the water surface above the aeration device, and the intensity of gas-liquid turbulence. Therefore, when determining the standard curve relationship, the total amount of ozone and gas volume expected during on-site testing must be considered. Furthermore, the reaction conditions, such as the size and shape of the test vessel, the aeration device and its placement, the dye solution, and the water depth, must be carefully considered to ensure that on-site testing conditions are identical to those used to determine the standard curve.

[0026] In order to accurately determine the ozone concentration, a verification experiment was conducted to verify that the dye concentration is proportional to the decolorization time: According to the literature, the acid blue R dye was selected because of its good decolorization effect, fast decolorization rate, stable chemical properties, good water solubility, non-toxicity to organisms, and wide use in many industries and low price. The test used a tubular titanium alloy aeration head with a length of 30mm, which was placed upright to touch the bottom during the test. A 1000mL measuring cylinder was used as the test container. During the test, the water depth of the measuring cylinder was kept at 240mm (when the aeration head was placed without aeration), and the volume of water was 700mL. Acid blue R dye was dissolved in pure water. A small ozone generator was used for the test, and the ozone volume during the test was 1.00L / min; the gaseous ozone concentration was 49.8mg / L. During the ozone oxidation process, the sign of decolorization is that the solution becomes clear and the blue-purple color disappears. The experimental results are shown in the following table:

[0027] Table 1

[0028]

[0029]

[0030] The results of the validation experiment show that within the measured range, the decolorization time and the dye concentration show a good linear correlation. When making a standard curve, a certain concentration of the above dye can be selected according to the range of ozone levels to be tested, as shown in the following examples.

[0031] Example: First, a standard curve is made in the laboratory. The test conditions are the same as those of the verification experiment. A small ozone generator is used for the test. The ozone volume is precisely adjusted to 1.00L / min. The ozone concentration is roughly controlled by adjusting the generator current adjustment knob. The concentration of the dye acid blue R is 150mg / L. After the working conditions are stable and the decolorization time is measured, the ozone concentration is accurately calibrated using the iodine method to obtain the attached Figure 2 The standard curve of the inverse of decolorization time and ozone concentration is shown.

[0032] The ozone generator to be tested is a large one used at the production site. Bring a 1000mL plastic glass graduated cylinder and accurately weigh 1500mg of the dye Acid Blue R. Upon arrival, dissolve the dye in 10L of clean water. During the on-site test, place 700mL of the dye solution in the graduated cylinder. Using the branch pipe from the very end of the ozone distribution pipe at the production site, install a wet gas flowmeter for precise measurement, controlling the flow rate at 1.00L / min. Once the flowmeter reading stabilizes and the waiting time exceeds three times the residence time of the ozone gas in the distribution pipe, begin ozone aeration and measure the decolorization time.

[0033] On-site observation shows that the decolorization time of acid blue R dye in plastic glass cylinder is 102s. Figure 2 The standard curve shows that the ozone supply concentration is 116 mg / L. To know the ozone production of the ozone generator under standard conditions, the flow rate can be obtained by the gas flow meter installed in the device and calculated accordingly.

[0034] The beneficial effects of the present invention are that, compared to the traditional iodine titration method, the present method simplifies testing conditions. It requires only a single on-site reaction vessel, such as a common 1000mL plastic glass graduated cylinder, a 10L household bucket, or a 25L or 50L plastic bucket; an ozone distribution device, such as a titanium aeration head (rod or disc); and a precisely defined mass of solid dye, which is dissolved on-site into a solution of a specific concentration. The dye used is non-toxic, harmless, environmentally friendly, easily available, and inexpensive, resulting in low testing costs. Within minutes, the concentration and mass of ozone produced by the ozone generator can be determined with high accuracy. Practical examples have shown that the test and analysis error can be controlled to within 1%.

[0035] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for rapidly determining the concentration of ozone generator supply gas, characterized in that: include: Verification experiments were conducted to establish that within a certain concentration range, the concentration of the dye solution is directly proportional to the ozone aeration decolorization time; At the appropriate dye concentration, a standard curve of the inverse of the decolorization time and the aeration ozone concentration is drawn for on-site rapid testing. The appropriate dye concentration refers to the dye concentration that can ensure that the decolorization time can be quickly measured within a certain range and with guaranteed accuracy; A specific mass of the solid dye is dissolved in a reaction container to form a dye solution of a specified concentration; Start the aeration of ozone gas and read the decolorization time; The ozone supply concentration is obtained according to the above standard curve; Read the gas flow meter to obtain the ozone production.

2. The method for rapidly measuring the concentration of ozone generator supply gas according to claim 1, characterized in that: When drawing the standard curve of the reciprocal of decolorization time and aeration ozone concentration, a small ozone generator is used, and the ozone volume is precisely adjusted to 1.00L / min. The ozone concentration is roughly controlled by adjusting the generator current adjustment knob. The concentration of the dye used for measurement is 150mg / L. After the working conditions stabilize and the decolorization time is measured, the ozone concentration is accurately calibrated using the iodine titration method to obtain the standard curve of the reciprocal of decolorization time and ozone concentration.

3. The method for rapidly measuring the concentration of ozone generator supply gas according to claim 1 or 2, characterized in that: Acid Blue R dye was used as the dye.

4. The method for rapidly measuring the concentration of ozone generator supply gas according to claim 1 or 2, characterized in that: The decolorization time at appropriate dye concentration is 10-600s.

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