Double-range ozone concentration analyzer

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Through the dual-range ozone concentration analyzer, the principle of dual-light ultraviolet absorption method is adopted to solve the problems of high cost and large errors in traditional detection methods, and the rapid and accurate detection of ozone concentration is achieved, reducing production costs.

CN119915759APending Publication Date: 2025-05-02SUZHOU PAINUO MEASUREMENT & CONTROL TECH CO LTD

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Patent Information

Application Number: CN202311426347.8
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2023-10-31
Publication Date: 2025-05-02

AI Technical Summary

Technical Problem

The traditional ozone concentration detection method requires the use of two instruments, which increases production costs, and the ozone sensor based on electrochemical principles has a large error and does not have long life when detecting low-concentration ozone.

Method used

It provides a dual-range ozone concentration analyzer, which adopts the principle of dual-ray ultraviolet absorption method, including LED light source, spectroscopic prism, light cell and light intensity detector, which can measure high and low concentration ozone at the same time, and has two working modes: dual-ray detection mode and ozone leakage detection mode.

Benefits of technology

It realizes rapid measurement of the ozone concentration at the ozone generator outlet in the dual-optical detection mode, which facilitates the regulation of the output of high-concentration ozone. It can simultaneously detect the ozone concentration in the ozone generator outlet and the environment in the ozone leakage detection mode, without the need for additional instruments, reducing production costs.

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Abstract

The double-range ozone concentration analyzer comprises a first electromagnetic three-way valve, a miniature vacuum pump, a second electromagnetic three-way valve and a light pool assembly, and the light pool assembly comprises an LED light source, a beam splitter prism, a first light pool, a first light intensity detector, a second light pool and a second light intensity detector; the light pool assembly is respectively connected with the first electromagnetic three-way valve, the tail gas treater, the second electromagnetic three-way valve and the second ozone washer. The analyzer has two working modes, under the double-light-path detection mode, the ozone concentration at the outlet of the ozone generator is continuously detected (the detection period is 1.5 s), the yield of high-concentration ozone is conveniently adjusted, and under the ozone leakage detection mode, the output of high-concentration ozone is conveniently adjusted. The ozone concentration of the outlet of the continuously operated ozone generator and the ozone concentration of the environment where the ozone generator is located can be detected at the same time (the detection period is 3s), no additional instrument is needed to detect whether the ozone generator leaks or not, and the production cost is reduced.

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Description

Technical Field

[0001] The invention relates to the field of gas concentration detection, in particular to a device for detecting ozone concentration using ultraviolet light. Background Art

[0002] Ozone is a highly effective disinfectant and oxidant, widely used in the purification and disinfection of drinking water, hospital sewage and industrial sewage. Ozone generator is a device used to produce ozone. Ozone output is an important technical indicator of ozone generator and a direct parameter to ensure the disinfection effect. Therefore, the scientific determination of ozone concentration is very important.

[0003] However, ozone can also cause asthma attacks in asthma patients, exacerbate chronic respiratory diseases, cause breathing disorders, damage lung function and other symptoms. Long-term inhalation of oxidants can reduce the metabolism of human cells, accelerate human aging, and cause crop yield reduction and vegetation damage. Therefore, online observation of environmental ozone concentration is of great significance.

[0004] During the operation of the ozone generator, the seals may age or corrode locally, which may lead to ozone leakage and endanger the health of the operator. The traditional method is to use a high-concentration ozone analyzer to detect the ozone output of the ozone generator and an ozone gas alarm based on the electrochemical principle to detect whether the ozone generator has leaked. However, the use of two instruments increases the production cost, and the ozone sensor based on the electrochemical principle has a large error when detecting low-concentration ozone and has a short lifespan. Summary of the invention

[0005] In view of the above problems, the main purpose of the present invention is to provide a dual-range ozone concentration analyzer to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dual-range ozone concentration analyzer, comprising a first electromagnetic three-way valve, a miniature vacuum pump, a second electromagnetic three-way valve, a third electromagnetic three-way valve, and a light pool assembly, wherein the light pool assembly comprises an LED light source, a spectroscopic prism, a first light pool, a first light intensity detector, a second light pool, and a second light intensity detector; the air inlet and the air outlet of the first light pool are respectively connected to the common port of the first electromagnetic three-way valve and the air inlet of the exhaust gas processor, the normally open port and the normally closed port of the first electromagnetic three-way valve are respectively connected to the air outlet of the anti-corrosion flowmeter and the normally closed port of the third electromagnetic three-way valve, and the air inlet of the anti-corrosion flowmeter is connected to the needle The air outlet of the valve is connected, the common port of the third electromagnetic three-way valve is connected to the air outlet of the miniature vacuum pump, the air inlet and air outlet of the second light pool are respectively connected to the common port of the second electromagnetic three-way valve and the air inlet of the second ozone scrubber, the normally open and normally closed ports of the second electromagnetic three-way valve are respectively connected to the air outlet of the first ozone scrubber and a PTFE three-way joint, the air inlet of the first ozone scrubber is connected to the PTFE three-way joint, the PTFE three-way joint is connected to the particle filter, the air outlet of the second ozone scrubber is connected to the air inlet of the flow sensor, and the air outlet of the flow sensor is connected to the air inlet of the miniature vacuum pump.

[0007] Furthermore, the optical pool assembly has two optical pools with optical paths, which can simultaneously measure high-concentration ozone and low-concentration ozone. The first optical pool is a short-path optical pool (the actual optical path is 1 mm) for detecting high-concentration ozone, and the second optical pool is a long-path optical pool (the actual optical path is 200 mm) for detecting low-concentration ozone.

[0008] Furthermore, the analyzer has two working modes: when adjusting the ozone output of the ozone generator, first perform zero calibration (step 1), then switch to the dual optical path detection mode (step 2), detect the concentration of high-concentration ozone, the detection cycle is 1.5s, and the short detection cycle is convenient for adjusting the ozone concentration emitted by the ozone generator. When the ozone output of the ozone generator is adjusted in place, first perform zero calibration (step 1), then switch to the ozone leakage detection mode (step 3), and simultaneously detect the concentration of high-concentration ozone emitted by the ozone generator and the ozone concentration in the environment where the ozone generator is located. The detection cycle is 3s. The purpose of detecting the ozone concentration in the environment where the ozone generator is located is to check whether there is ozone leakage caused by aging of the seal or other failures. The specific steps include:

[0009] Step 1, zero calibration mode, after the analyzer is turned on, it is first preheated to energize the LED light source, the first light intensity detector, the second light intensity detector and the micro vacuum pump. After preheating for 10 minutes, the first electromagnetic three-way valve and the third electromagnetic three-way valve are energized for 1.5 seconds at the same time, and the second electromagnetic three-way valve is in a de-energized state. The micro vacuum pump discharges the clean, ozone-free gas that has passed through the second ozone scrubber into the first light pool. At this time, the 254nm ultraviolet light emitted by the LED light source shines through the ozone-free gas onto the first light intensity detector. After averaging the current of the first light intensity detector within a unit time, the reference current is measured. ; Simultaneously with the above measurement, a micro vacuum pump draws the ambient gas that has passed through the particle filter and the first ozone scrubber into the second light pool. At this time, the ultraviolet light emitted by the LED light source shines through the ozone-free gas onto the second light intensity detector. After averaging the current of the second light intensity detector per unit time, the reference current is measured. ;

[0010] Step 2, dual light path detection mode, after the analyzer is zeroed, it enters the dual light path detection mode. In the first 1.5s, the first electromagnetic three-way valve, the second electromagnetic three-way valve and the third electromagnetic three-way valve are all in a power-off state. The high-pressure ozone gas emitted by the high-concentration ozone generator is adjusted by the needle valve and enters the first light pool. At this time, the 254nm ultraviolet light emitted by the LED light source is irradiated onto the first light intensity detector through the high-concentration ozone gas. After averaging the current of the first light intensity detector within a unit time, the current is measured. ; Simultaneously with the above measurement, a micro vacuum pump draws the ambient gas that has passed through the particle filter and the first ozone scrubber into the second light pool. At this time, the ultraviolet light emitted by the LED light source shines through the ozone-free gas onto the second light intensity detector. After averaging the current of the second light intensity detector per unit time, the current is measured at the first 1.5s. At the same time, the micro vacuum pump discharges ozone-free gas through the normally open third electromagnetic three-way valve; the transmittance of high-concentration ozone can be calculated as , the light intensity change rate of the LED light source, that is, the light intensity correction coefficient is The corrected transmittance of high concentration ozone is , and then combined with other parameters (such as pressure and temperature), the analyzer's microprocessor system calculates the concentration of high-concentration ozone according to the Lambert-Beer law. At the second 1.5s, the induced currents of the first light intensity detector and the second light intensity detector are respectively and The corrected transmittance of high concentration ozone is , then calculate the concentration of high concentration ozone, and the following measurement steps are analogous;

[0011] Step 3, ozone leak detection mode, after the ozone output of the ozone generator is adjusted to the right position, the analyzer first enters the zero calibration mode. In the first 1.5s, after executing step 1, the reference currents of the first light intensity detector and the second light intensity detector are respectively measured. and In the second 1.5s, the ozone leak detection mode is entered. First, the second electromagnetic three-way valve is energized for 1.5s, and the first and third electromagnetic three-way valves are in a de-energized state. High-concentration ozone enters the first light pool, and the ambient gas is drawn into the second light pool. The measured values are and At the same time, the micro vacuum pump discharges ozone-free gas through the normally open third electromagnetic three-way valve; the transmittance of high-concentration ozone can be calculated as , the transmittance of ozone in the environment is , and then calculate the concentrations of the two ozone. At the third 1.5s, the analyzer completes step 1 and measures the reference currents of the first light intensity detector and the second light intensity detector respectively. and At the fourth 1.5s, the analyzer completes step 3 and measures the reference currents of the first light intensity detector and the second light intensity detector as and , the transmittance of high concentration ozone can be calculated as , the transmittance of ozone in the environment is , and then calculate the concentration of the two types of ozone, and the following measurement steps are similar.

[0012] The beneficial effects of the present invention are as follows: the analyzer adopts the principle structure of the dual-light path ultraviolet absorption method and has two working modes. In the dual-light path detection mode, the analyzer has a detection cycle of 1.5s, and can timely measure the ozone concentration at the current ozone generator outlet, so as to facilitate the adjustment of the output of high-concentration ozone; in the ozone leakage detection mode, the analyzer can simultaneously detect the ozone concentration at the outlet of the continuously running ozone generator and the ozone concentration in the environment where the ozone generator is located, without the need to configure additional instruments to detect whether the ozone generator is leaking, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural principle diagram of an embodiment of an ozone detection device of the present invention.

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0015] like Figure 1As shown, the dual-range ozone concentration analyzer includes a first electromagnetic three-way valve 102, a micro vacuum pump 104, a second electromagnetic three-way valve 303, a third electromagnetic three-way valve 103, and a light pool assembly 200. The light pool assembly 200 includes an LED light source 201, a spectroscopic prism 202, a first light pool 203, a first light intensity detector 204, a second light pool 206, and a second light intensity detector 205; the air inlet and the air outlet of the first light pool 203 are respectively connected to the common port of the first electromagnetic three-way valve 102 and the air inlet of the exhaust gas processor 105, the normally open port and the normally closed port of the first electromagnetic three-way valve 102 are respectively connected to the air outlet of the anti-corrosion flow meter 101 and the normally closed port of the third electromagnetic three-way valve 103, and the air inlet of the anti-corrosion flow meter 101 is connected to the air outlet of the needle valve 100. The common port of the third electromagnetic three-way valve 103 is connected to the air outlet of the micro vacuum pump 104, the air inlet and air outlet of the second light pool 206 are respectively connected to the common port of the second electromagnetic three-way valve 303 and the air inlet of the second ozone scrubber 304, the normally open and normally closed ports of the second electromagnetic three-way valve 303 are respectively connected to the air outlet of the first ozone scrubber 302 and the PTFE three-way joint 301, the air inlet of the first ozone scrubber 302 is connected to the PTFE three-way joint 301, the PTFE three-way joint 301 is connected to the particle filter 300, the air outlet of the second ozone scrubber 304 is connected to the air inlet of the flow sensor 305, and the air outlet of the flow sensor 305 is connected to the air inlet of the micro vacuum pump 104.

[0016] The analysis steps include:

[0017] Step 1, zero calibration mode. After the analyzer is turned on, it is first preheated to power on the LED light source 201, the first light intensity detector 204, the second light intensity detector 205 and the micro vacuum pump 104. After preheating for 10 minutes, the first electromagnetic three-way valve 102 and the third electromagnetic three-way valve 103 are powered on for 1.5 seconds at the same time, and the second electromagnetic three-way valve 303 is in a power-off state. The micro vacuum pump 104 discharges the clean, ozone-free gas that has passed through the second ozone scrubber 304 into the first light pool 203. At this time, the 254nm ultraviolet light emitted by the LED light source 201 shines on the first light intensity detector 204 through the ozone-free gas. After averaging the current of the first light intensity detector 204 per unit time, the reference current is measured. Simultaneously with the above measurement, the micro vacuum pump 104 draws the ambient gas that has passed through the particle filter 300 and the first ozone scrubber 302 into the second light pool 206. At this time, the ultraviolet light emitted by the LED light source 200 passes through the ozone-free gas and irradiates the second light intensity detector 205. After averaging the current of the second light intensity detector 205 per unit time, the reference current is measured. ;

[0018] Step 2, dual light path detection mode, after the analyzer is zeroed, it enters the dual light path detection mode. In the first 1.5s, the first electromagnetic three-way valve 102, the second electromagnetic three-way valve 303 and the third electromagnetic three-way valve 103 are all in a power-off state. The high-pressure ozone gas emitted by the high-concentration ozone generator is adjusted by the needle valve 100 and enters the first light pool 203. At this time, the 254nm ultraviolet light emitted by the LED light source 201 is irradiated onto the first light intensity detector 204 through the high-concentration ozone gas. After averaging the current of the first light intensity detector 204 per unit time, the current is measured. ; Simultaneously with the above measurement, the micro vacuum pump 104 draws the ambient gas that has passed through the particle filter 300 and the first ozone scrubber 302 into the second light pool 206. At this time, the ultraviolet light emitted by the LED light source 201 shines through the ozone-free gas onto the second light intensity detector 205. After averaging the current of the second light intensity detector 205 per unit time, the current is measured at the first 1.5s. At the same time, the micro vacuum pump 104 discharges ozone-free gas through the normally open third electromagnetic three-way valve 103; the transmittance of high-concentration ozone can be calculated as , the light intensity change rate of the LED light source 201, that is, the light intensity correction coefficient is The corrected transmittance of high concentration ozone is , and then the analyzer's microprocessor system calculates the concentration of high-concentration ozone according to the Lambert-Beer law in combination with other parameters (such as pressure and temperature). At the second 1.5s, the induced currents of the first light intensity detector 204 and the second light intensity detector 205 are respectively measured to be and The corrected transmittance of high concentration ozone is , then calculate the concentration of high concentration ozone, and the following measurement steps are analogous;

[0019] Step 3, ozone leak detection mode, after the ozone output of the ozone generator is adjusted to the right position, the analyzer first enters the zero calibration mode. In the first 1.5s, after executing step 1, the reference currents of the first light intensity detector 204 and the second light intensity detector 205 are respectively measured. and , within the second 1.5s, then enter the ozone leak detection mode, firstly make the second electromagnetic three-way valve 303 energized for 1.5s, the first electromagnetic three-way valve 102 and the third electromagnetic three-way valve 103 are in the de-energized state, high concentration ozone enters the first light pool 203, and the ambient gas is drawn into the second light pool 206, respectively. and At the same time, the micro vacuum pump 104 discharges ozone-free gas through the normally open third electromagnetic three-way valve 103; the transmittance of high-concentration ozone can be calculated as , the transmittance of ozone in the environment is , and then calculate the concentrations of the two ozone. At the third 1.5s, the analyzer completes step 1 and measures the reference currents of the first light intensity detector 204 and the second light intensity detector 205, respectively. and At the fourth 1.5s, the analyzer executes step 3 and measures the reference currents of the first light intensity detector 204 and the second light intensity detector 205 as and , the transmittance of high concentration ozone can be calculated as , the transmittance of ozone in the environment is , and then calculate the concentration of the two types of ozone, and the following measurement steps are similar.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-range ozone concentration analyzer, characterized in that: The invention comprises a first electromagnetic three-way valve, a micro vacuum pump, a second electromagnetic three-way valve, a third electromagnetic three-way valve and a light pool component, wherein the light pool component comprises an LED light source, a spectroscopic prism, a first light pool, a first light intensity detector, a second light pool and a second light intensity detector; the air inlet and the air outlet of the first light pool are respectively connected to the common port of the first electromagnetic three-way valve and the air inlet of the exhaust gas processor, the normally open port and the normally closed port of the first electromagnetic three-way valve are respectively connected to the air outlet of the anti-corrosion flow meter and the normally closed port of the third electromagnetic three-way valve, the air inlet of the anti-corrosion flow meter is connected to the air outlet of the needle valve, the third electromagnetic three-way valve is connected to the air outlet of the needle valve, and the air inlet of the needle valve is connected to the air outlet of the needle valve. The common port is connected to the air outlet of the miniature vacuum pump, the air inlet and the air outlet of the second optical pool are respectively connected to the common port of the second electromagnetic three-way valve and the air inlet of the second ozone scrubber, the normally open port and the normally closed port of the second electromagnetic three-way valve are respectively connected to the air outlet and the PTFE three-way joint of the first ozone scrubber, the air inlet of the first ozone scrubber is connected to the PTFE three-way joint, the PTFE three-way joint is connected to the particle filter, the air outlet of the second ozone scrubber is connected to the air inlet of the flow sensor, and the air outlet of the flow sensor is connected to the air inlet of the miniature vacuum pump; The analysis steps include: Step 1, zero calibration mode, after the analyzer is turned on, it is first preheated to energize the LED light source, the first light intensity detector, the second light intensity detector and the micro vacuum pump. After preheating for 10 minutes, the first electromagnetic three-way valve and the third electromagnetic three-way valve are energized for 1.5 seconds at the same time, and the second electromagnetic three-way valve is in a de-energized state. The micro vacuum pump discharges the clean, ozone-free gas that has passed through the second ozone scrubber into the first light pool. At this time, the 254nm ultraviolet light emitted by the LED light source shines through the ozone-free gas onto the first light intensity detector. After averaging the current of the first light intensity detector within a unit time, the reference current is measured. ; Simultaneously with the above measurement, a micro vacuum pump draws the ambient gas that has passed through the particle filter and the first ozone scrubber into the second light pool. At this time, the ultraviolet light emitted by the LED light source shines through the ozone-free gas onto the second light intensity detector. After averaging the current of the second light intensity detector per unit time, the reference current is measured. ; Step 2, dual light path detection mode, after the analyzer is zeroed, it enters the dual light path detection mode. In the first 1.5s, the first electromagnetic three-way valve, the second electromagnetic three-way valve and the third electromagnetic three-way valve are all in a power-off state. The high-pressure ozone gas emitted by the high-concentration ozone generator is adjusted by the needle valve and enters the first light pool. At this time, the 254nm ultraviolet light emitted by the LED light source is irradiated onto the first light intensity detector through the high-concentration ozone gas. After averaging the current of the first light intensity detector within a unit time, the current is measured. ; Simultaneously with the above measurement, a micro vacuum pump draws the ambient gas that has passed through the particle filter and the first ozone scrubber into the second light pool. At this time, the ultraviolet light emitted by the LED light source shines through the ozone-free gas onto the second light intensity detector. After averaging the current of the second light intensity detector per unit time, the current is measured at the first 1.5s. At the same time, the micro vacuum pump discharges ozone-free gas through the normally open third electromagnetic three-way valve; the transmittance of high-concentration ozone can be calculated as , the light intensity change rate of the LED light source, that is, the light intensity correction coefficient is The corrected transmittance of high concentration ozone is , and then combined with other parameters (such as pressure and temperature), the analyzer's microprocessor system calculates the concentration of high-concentration ozone according to the Lambert-Beer law. At the second 1.5s, the induced currents of the first light intensity detector and the second light intensity detector are respectively and The corrected transmittance of high concentration ozone is , then calculate the concentration of high concentration ozone, and the following measurement steps are analogous; Step 3, ozone leak detection mode, after the ozone output of the ozone generator is adjusted to the right position, the analyzer first enters the zero calibration mode. In the first 1.5s, after executing step 1, the reference currents of the first light intensity detector and the second light intensity detector are respectively measured. and In the second 1.5s, the ozone leak detection mode is entered. First, the second electromagnetic three-way valve is energized for 1.5s, and the first and third electromagnetic three-way valves are in a de-energized state. High-concentration ozone enters the first light pool, and the ambient gas is drawn into the second light pool. The measured values are and At the same time, the micro vacuum pump discharges ozone-free gas through the normally open third electromagnetic three-way valve; the transmittance of high-concentration ozone can be calculated as , the transmittance of ozone in the environment is , and then calculate the concentration of the two ozone. At the third 1.5s, the analyzer completes step 1 and measures the reference currents of the first light intensity detector and the second light intensity detector respectively. and At the fourth 1.5s, the analyzer completes step 3 and measures the reference currents of the first light intensity detector and the second light intensity detector as and , the transmittance of high concentration ozone can be calculated as , the transmittance of ozone in the environment is , and then calculate the concentration of the two types of ozone, and the following measurement steps are similar.

2. The dual-range ozone concentration analyzer according to claim 1, characterized in that: The optical pool assembly has two optical pools with optical paths, which can simultaneously measure high-concentration ozone and low-concentration ozone. The first optical pool is a short-path optical pool (the actual optical path is 1 mm) for detecting high-concentration ozone, and the second optical pool is a long-path optical pool (the actual optical path is 200 mm) for detecting low-concentration ozone.

3. The dual-range ozone concentration analyzer according to claim 2, characterized in that: The analyzer has two working modes: when adjusting the ozone output of the ozone generator, first perform zero calibration (step 1), then switch to the dual-optical path detection mode (step 2) to detect the concentration of high-concentration ozone. The detection cycle is 1.5s. The short detection cycle is convenient for adjusting the ozone concentration emitted by the ozone generator. When the ozone output of the ozone generator is adjusted to the right level, first perform zero calibration (step 1), then switch to the ozone leakage detection mode (step 3), and simultaneously detect the concentration of high-concentration ozone emitted by the ozone generator and the ozone concentration in the environment where the ozone generator is located. The detection cycle is 3s. The ozone concentration in the environment where the ozone generator is located is to check whether there is ozone leakage caused by aging of seals or other failures.