Integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone and using method

Abstract

The invention provides an integrated device for monitoring hydrogen sulfide in electroplating waste gas and performing ozone treatment and a use method. The integrated device for monitoring hydrogen sulfide in electroplating waste gas and performing ozone treatment comprises a hydrogen sulfide real-time monitoring module, an intelligent feedback control module and a catalytic ozonation treatment module which are connected in sequence, the hydrogen sulfide real-time monitoring module comprises a color developing agent benzothiazole azo-beta-naphthol and Fe < 3 + > complex; the hydrogen sulfide concentration range which can be detected by the hydrogen sulfide real-time monitoring module is 0.1-100 ppm; the ozone catalytic oxidation treatment module comprises a honeycomb MnO2-CeO2-Pt ozone catalyst; a fuzzy PID algorithm is arranged in the intelligent feedback control module. Accurate monitoring and emergency treatment of hydrogen sulfide in the electroplating waste gas are integrated, potential safety hazards of the hydrogen sulfide waste gas are solved, and the device is suitable for large-scale application and popularization in the electroplating field.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas monitoring and treatment, and in particular to an integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone, and a method for using the device. Background Art

[0002] Hydrogen sulfide in electroplating waste gas is highly toxic and poses a serious threat to both humans and the environment. Hydrogen sulfide is a colorless, highly toxic gas with the odor of rotten eggs. At certain concentrations, it can paralyze the human sense of smell. At concentrations above 50 ppm, it can be harmful to the human body. At concentrations above 1000 ppm, it can cause respiratory arrest, coma, or even death. Hydrogen sulfide is primarily generated by the reaction of hazardous chemicals like sodium sulfide with acids, such as strong acids.

[0003] CN206907201U discloses a real-time monitoring system for exhaust gas from fishing vessels, which is formed by a fish hold exhaust gas monitoring subsystem, a fishing vessel control subsystem and an emergency support subsystem. Each hydrogen sulfide sensor in the fish hold exhaust gas monitoring subsystem sends real-time monitoring data of the hydrogen sulfide gas content in the fish hold to a fish hold processing module. When the fish hold processing module determines that the current hydrogen sulfide gas content in the fish hold exceeds the alarm threshold and the fluctuation value of the hydrogen sulfide gas content in the fish hold is less than the preset alarm fluctuation threshold, the fish hold processing module respectively instructs the exhaust fan and the first alarm device to start; when the fishing vessel staff discovers that gas poisoning occurs in the fish hold, the onboard staff establishes a real-time video connection with the medical department subsystem, receives first aid guidance from the medical department, and the maritime emergency rescue command center instructs the subsystems of each department to start a rescue response for the current fishing vessel.

[0004] CN208018411U discloses a laboratory hydrogen sulfide waste gas treatment device, including a collector, a chemical absorber and a physical adsorber, the collector is connected to the chemical absorber through a first air pipe, the chemical absorber is provided with an absorption solution, the chemical absorber is connected to the top of the physical adsorber through a second air pipe, the physical adsorber is provided with an adsorbent layer, the bottom of the physical adsorber is provided with an exhaust port, and a hydrogen sulfide concentration alarm is provided in the physical adsorber near the exhaust port.

[0005] CN218501699U discloses a biochemical odor circulating water recycling and utilization system, comprising a primary scrubber and a secondary scrubber, wherein the primary scrubber is connected to an exhaust gas inlet pipe and a sodium hydroxide dosing device, the exhaust gas inlet pipe is connected to a first hydrogen sulfide concentration detector, and a first pH online monitor is provided in the primary scrubber; the secondary scrubber is connected to the primary scrubber for treating unabsorbed hydrogen sulfide gas, the gas inlet of the secondary scrubber is connected to a second hydrogen sulfide concentration detector, the secondary scrubber is connected to a sodium hypochlorite dosing device, and a second pH online monitor and an ORP monitor probe are further provided in the secondary scrubber, wherein the sodium hypochlorite dosing device can control the dosing according to the detection value of the ORP monitor probe until the remaining hydrogen sulfide gas is completely removed and then stops.

[0006] However, the above-mentioned device system is not suitable for monitoring and treating hydrogen sulfide gas in electroplating workshops with high corrosion and high interference exhaust gas. Summary of the Invention

[0007] In view of the problems existing in the prior art, the present invention provides an integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone and a method for use. A hydrogen sulfide real-time monitoring module is used to accurately measure the concentration of hydrogen sulfide gas in electroplating waste gas using a color developer, and an intelligent feedback control module is used to obtain the optimal ozone dosage. Ozone is generated by an ozone catalytic oxidation treatment module to efficiently treat hydrogen sulfide waste gas, thereby solving the safety hazards caused by hydrogen sulfide gas in electroplating production.

[0008] To achieve this object, the present invention adopts the following technical solutions:

[0009] In a first aspect, the present invention provides an integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone, the integrated device comprising a hydrogen sulfide real-time monitoring module, an intelligent feedback control module, and an ozone catalytic oxidation treatment module connected in sequence;

[0010] The hydrogen sulfide real-time monitoring module includes a color developing agent benzothiazolylazo-β-naphthol and Fe 3+ The hydrogen sulfide real-time monitoring module can detect a hydrogen sulfide concentration range of 0.1 to 100 ppm;

[0011] The ozone catalytic oxidation treatment module includes a honeycomb MnO2-CeO2-Pt ozone catalyst;

[0012] A fuzzy PID algorithm is provided in the intelligent feedback control module.

[0013] The integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone according to the present invention includes a real-time hydrogen sulfide monitoring module and an ozone catalytic oxidation treatment module, which realizes the integration of real-time monitoring and ozone treatment of hydrogen sulfide in electroplating waste gas, and performs them simultaneously. The exhaust duct opening of the electroplating workshop can be installed. The real-time hydrogen sulfide monitoring module uses a color developer to test hydrogen sulfide in electroplating waste gas, and accurately displays the concentration of hydrogen sulfide gas by RGB value. The detectable hydrogen sulfide concentration range is large, and the scope of application is wide. It can accurately monitor hydrogen sulfide gas under high corrosion and multi-interference waste gas in electroplating workshops. The intelligent feedback control module calculates the optimal ozone dosage under different hydrogen sulfide gas concentrations through a fuzzy PID algorithm, dynamically adjusts the working state of the ozone catalytic oxidation treatment module, and realizes high-efficiency and low-cost treatment of hydrogen sulfide in electroplating waste gas. The ozone catalytic oxidation treatment module of the present invention includes a honeycomb MnO2-CeO2-Pt ozone catalyst, and the hydrogen sulfide oxidation efficiency at a temperature of 80°C can reach more than 99.5%, and the hydrogen sulfide is oxidized into sulfate and water without secondary pollution.

[0014] The color developing agent benzothiazolylazo-β-naphthol and Fe 3+ The color response time of the complex is ≤2s, the color gradient covers RGB (255, 255, 255) to RGB (120, 50, 80), and the color difference value ΔC is ≥40.

[0015] Preferably, the color developer benzothiazolylazo-β-naphthol and Fe 3+ The preparation method of the complex comprises the following steps:

[0016] (1) adding benzothiazolylazo-β-naphthol to an ethanol-water mixed solvent, adding an alkaline solution until the mixture is completely dissolved, adding an acidic solution to adjust the pH to acidic, heating, and adding FeCl3 solution dropwise to react at a constant temperature to obtain a color-developing solution;

[0017] (2) activating the porous silica microspheres with a nitric acid solution and drying them to obtain activated silica microspheres;

[0018] (3) Mix the color development solution with the activated silica gel microspheres, perform ultrasound-assisted loading, and dry under nitrogen protection to obtain benzothiazolylazo-β-naphthol and Fe 3+ complex.

[0019] Preferably, the ethanol-water mixed solvent in step (1) is in a volume ratio of 3:1 to 4:1, for example, it can be 3:1, 3.2:1, 3.5:1, 3.7:1, 3.8:1, 3.9:1 or 4:1, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0020] Preferably, in step (1), the pH is adjusted to 8.5 to 9.0 by adding an alkaline solution, for example, 8.5, 8.6, 8.7, 8.8 or 9.0, etc., but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0021] Preferably, in step (1), the acidic solution is added to adjust the pH to 2.1-2.3, for example, 2.1, 2.15, 2.2, 2.25 or 2.3, etc., but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0022] Preferably, the heating temperature in step (1) is 60-65°C, for example, 60°C, 61°C, 62°C, 62.5°C, 63°C or 65°C, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0023] Preferably, the concentration of the FeCl3 solution in step (1) is 0.05 to 0.08 mol / L, for example, it can be 0.05 mol / L, 0.055 mol / L, 0.06 mol / L, 0.065 mol / L, 0.07 mol / L, 0.075 mol / L or 0.08 mol / L, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0024] Preferably, the molar ratio of the benzothiazolylazo-β-naphthol to the FeCl3 solution in step (1) is 1:1.2 to 1:1.4, for example, it can be 1:1.2, 1:1.21, 1:1.22, 1:1.25, 1:1.3, 1:1.35 or 1:1.4, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0025] Preferably, the temperature of the isothermal reaction in step (1) is 60-65°C, for example, 60°C, 61°C, 62°C, 62.5°C, 63°C or 65°C, etc., but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable;

[0026] The time is 90 to 120 minutes, for example, it can be 90 minutes, 95 minutes, 98 minutes, 100 minutes, 105 minutes, 110 minutes or 120 minutes, etc., but is not limited to the listed values. Other values ​​not listed within the numerical range are also applicable.

[0027] Preferably, the pore size of the porous silica microspheres in step (2) is 10 to 15 nm, for example, 10 nm, 11 nm, 12 nm, 12.5 nm, 13 nm, 14 nm or 15 nm, etc., but is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0028] Preferably, the concentration of the nitric acid solution in step (2) is 0.5 to 0.8 mol / L, for example, it can be 0.5 mol / L, 0.55 mol / L, 0.6 mol / L, 0.65 mol / L, 0.7 mol / L or 0.8 mol / L, etc., but is not limited to the listed values, and other values ​​not listed within this numerical range are also applicable.

[0029] Preferably, the drying temperature in step (2) is 100-110° C., for example, 100° C., 102° C., 105° C., 108° C., 109° C., or 110° C., but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable;

[0030] The time is 2 to 3 hours, for example, it can be 2 hours, 2.2 hours, 2.4 hours, 2.7 hours, 2.8 hours, 2.9 hours or 3 hours, but is not limited to the listed values. Other values ​​not listed within the numerical range are also applicable.

[0031] Preferably, the mass ratio of the color developing solution in step (3) to the activated silica microspheres is 1:5 to 1:6, for example, it can be 1:5, 1:5.2, 1:5.4, 1:5.6, 1:5.8 or 1:6, etc., but is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0032] Preferably, the frequency of the ultrasonic wave in the ultrasonic-assisted load in step (3) is 40 to 50 kHz, for example, 40 kHz, 42 kHz, 44 kHz, 46 kHz, 47 kHz or 50 kHz, etc., but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable;

[0033] The ultrasound-assisted loading time is 20 to 30 minutes, for example, 20 minutes, 22 minutes, 24 minutes, 25 minutes, 28 minutes or 30 minutes, etc., but is not limited to the listed values. Other values ​​not listed within the numerical range are also applicable.

[0034] Preferably, the drying temperature in step (3) is 60-70°C, for example, 60°C, 62°C, 64°C, 66°C, 68°C or 70°C, etc., but is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0035] Preferably, the hydrogen sulfide real-time monitoring module further includes a dual-wavelength LED light source and a CMOS image sensor, and eliminates the cross-interference between NH3 and Cl2 in the electroplating exhaust gas through a color space conversion algorithm.

[0036] Preferably, the dual-wavelength LED light source includes an LED light source with a wavelength of 450 nm and an LED light source with a wavelength of 550 nm.

[0037] Preferably, the preparation method of the honeycomb MnO2-CeO2-Pt ozone catalyst comprises: mixing manganese dioxide and cerium oxide in a mass ratio of 3:1 to 4:1, for example, 3:1, 3.1:1, 3.3:1, 3.5:1, 3.7:1, 3.9:1 or 4:1, etc., but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable;

[0038] After being loaded on a cordierite honeycomb ceramic matrix, nano-platinum particles are sprayed on the surface as a co-catalyst.

[0039] Preferably, the ozone catalytic oxidation treatment module further includes a high-pressure pulse ozone generator.

[0040] In a second aspect, the present invention further provides a method for using the integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone as described in the first aspect, the method comprising:

[0041] The hydrogen sulfide real-time monitoring module absorbs hydrogen sulfide in electroplating exhaust gas, displays different colors, and transmits the color data to the intelligent feedback control module;

[0042] The intelligent feedback control module analyzes the color data to obtain the hydrogen sulfide concentration and the hydrogen sulfide concentration change gradient, uses the fuzzy PID algorithm to obtain the ozone dosage data and transmits it to the ozone catalytic oxidation treatment module;

[0043] The ozone catalytic oxidation treatment module generates a corresponding amount of ozone and reduces the concentration of hydrogen sulfide ≥10 ppm to 1 ppm within 30 seconds under the action of the honeycomb MnO2-CeO2-Pt ozone catalyst.

[0044] The method for using the integrated device for hydrogen sulfide monitoring and ozone treatment in electroplating waste gas described in the present invention is simple to operate. The real-time hydrogen sulfide monitoring module absorbs hydrogen sulfide in the electroplating waste gas through a color developer and transmits color data to the intelligent feedback control module. It is suitable for accurately measuring the hydrogen sulfide concentration in electroplating waste gas with complex waste gas components and many interferences; the intelligent feedback control module then regulates the ozone dosage of the ozone catalytic oxidation treatment module without the need for manual operation, thereby greatly improving the emergency treatment efficiency of hydrogen sulfide gas in electroplating waste gas; compared with existing ozone treatment devices, ozone consumption can be reduced by more than 30%, which is suitable for large-scale promotion and application in the electroplating industry.

[0045] Preferably, the method of obtaining the ozone dosage using the fuzzy PID algorithm includes calculating the basic ozone dosage using an ozone basic dosage model, calculating the ozone gradient compensation amount using an ozone gradient compensation model, and the sum of the basic ozone dosage and the ozone gradient compensation amount is the ozone dosage.

[0046] Preferably, the basic ozone dosing model includes:

[0047]

[0048] Where: Q base is the basic dosage of ozone, m 3 / h;

[0049] V is the flow rate of electroplating waste gas, m 3 / h;

[0050] is the concentration of hydrogen sulfide, ppm;

[0051] η is the catalytic efficiency of the honeycomb MnO2-CeO2-Pt ozone catalyst, which is 0.95.

[0052] Preferably, the ozone gradient compensation model includes:

[0053]

[0054] Where: Q comp is the ozone gradient compensation dosage, m 3 / h;

[0055] is the gradient of hydrogen sulfide concentration;

[0056] is the weight function, and the calculation formula is

[0057] K P is the proportional coefficient correction value, and the calculation formula is:

[0058] K P0 is the initial proportional coefficient reference value;

[0059] t is the observation time window of hydrogen sulfide gas concentration change, reflecting the response time of the intelligent feedback control module to the sudden change of hydrogen sulfide concentration, in seconds;

[0060] α is the gradient sensitivity coefficient, which is set to 0.2.

[0061] As a preferred technical solution of the present invention, the method of use includes:

[0062] The hydrogen sulfide real-time monitoring module absorbs hydrogen sulfide in electroplating exhaust gas, displays different colors, and transmits the color data to the intelligent feedback control module;

[0063] The intelligent feedback control module analyzes the color data to obtain the hydrogen sulfide concentration and the hydrogen sulfide concentration change gradient, calculates the basic ozone dosage using the ozone basic dosage model, calculates the ozone gradient compensation amount using the ozone gradient compensation model, and sums the basic ozone dosage and the ozone gradient compensation amount to obtain the ozone dosage. The ozone dosage data result is transmitted to the ozone catalytic oxidation treatment module;

[0064] The ozone catalytic oxidation treatment module generates a corresponding amount of ozone and reduces the concentration of hydrogen sulfide ≥10 ppm to 1 ppm within 30 seconds under the action of the honeycomb MnO2-CeO2-Pt ozone catalyst;

[0065] The ozone basic dosing model includes:

[0066]

[0067] Where: Q base is the basic dosage of ozone, m 3 / h;

[0068] V is the flow rate of electroplating waste gas, m 3 / h;

[0069] is the concentration of hydrogen sulfide, ppm;

[0070] η is the catalytic efficiency of the honeycomb MnO2-CeO2-Pt ozone catalyst, which is 0.95;

[0071] The ozone gradient compensation model includes:

[0072]

[0073] Where: Q comp is the ozone gradient compensation dosage, m 3 / h;

[0074] is the gradient of hydrogen sulfide concentration;

[0075] is the weight function, and the calculation formula is

[0076] K P is the proportional coefficient correction value, and the calculation formula is:

[0077] K P0 is the initial proportional coefficient reference value;

[0078] t is the observation time window of hydrogen sulfide gas concentration change, reflecting the response time of the intelligent feedback control module to the sudden change of hydrogen sulfide concentration, in seconds;

[0079] α is the gradient sensitivity coefficient, which is set to 0.2.

[0080] Compared with the prior art, the present invention has at least the following beneficial effects:

[0081] The integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone provided by the present invention monitors the concentration of hydrogen sulfide in electroplating waste gas in real time through a hydrogen sulfide real-time monitoring module, and dynamically regulates the amount of ozone generated in the ozone catalytic oxidation treatment module through an intelligent feedback control module, thereby realizing accurate monitoring of hydrogen sulfide in electroplating waste gas and integrated emergency treatment, solving the safety hazards of hydrogen sulfide waste gas, and being suitable for large-scale promotion and application in the field of electroplating. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] Figure 1 It is a schematic diagram of the module connection of an integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone provided in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0083] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0084] The present invention is further described in detail below. However, the following examples are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

[0085] As a specific embodiment of the present invention, a device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone is provided. The device comprises a hydrogen sulfide real-time monitoring module, an intelligent feedback control module and an ozone catalytic oxidation treatment module connected in sequence. The module connection diagram is shown in FIG. Figure 1 shown.

[0086] The hydrogen sulfide real-time monitoring module includes a color developing agent benzothiazolylazo-β-naphthol and Fe 3+ The hydrogen sulfide real-time monitoring module can detect a hydrogen sulfide concentration range of 0.1 to 100 ppm.

[0087] The ozone catalytic oxidation treatment module includes a honeycomb MnO2-CeO2-Pt ozone catalyst.

[0088] A fuzzy PID algorithm is provided in the intelligent feedback control module.

[0089] The color developing agent benzothiazolylazo-β-naphthol and Fe 3+The preparation method of the complex comprises the following steps:

[0090] (1) adding benzothiazolylazo-β-naphthol to a 4:1 volume ratio ethanol-water mixed solvent, adding an alkaline solution to adjust the pH to 8.5, and after the solid is completely dissolved, adding an acidic solution to adjust the pH to 2.2 and heating to 60° C., adding a 0.05 mol / L FeCl 3 solution dropwise and carrying out a constant temperature reaction at 60° C. for 90 minutes to obtain a color-developing solution; the molar ratio of the benzothiazolylazo-β-naphthol to the FeCl 3 solution is 1:1.2;

[0091] (2) Porous silica microspheres with a pore size of 10 nm were activated with a 0.5 mol / L nitric acid solution and then dried at 110°C for 2 h to obtain activated silica microspheres;

[0092] (3) The color developing solution and the activated silica gel microspheres were mixed in a mass ratio of 1:5, and the assisted loading was carried out at an ultrasonic frequency of 40 kHz for 30 min. The mixture was dried at 60 ° C under nitrogen protection to obtain benzothiazolylazo-β-naphthol and Fe 3+ complex.

[0093] The hydrogen sulfide real-time monitoring module also includes a dual-wavelength LED light source and a CMOS image sensor.

[0094] The dual-wavelength LED light source includes an LED light source with a wavelength of 450 nm and an LED light source with a wavelength of 550 nm.

[0095] The preparation method of the honeycomb MnO2-CeO2-Pt ozone catalyst comprises: mixing manganese dioxide and cerium oxide in a mass ratio of 3:1, loading the mixture on a cordierite honeycomb ceramic matrix, and then spraying nano-platinum particles on the surface as a co-catalyst.

[0096] The ozone catalytic oxidation treatment module also includes a high-pressure pulse ozone generator.

[0097] As a specific embodiment of the present invention, a method for using the above-mentioned integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone is also provided, and the method for using the device comprises:

[0098] The hydrogen sulfide real-time monitoring module absorbs hydrogen sulfide in electroplating exhaust gas, displays different colors, and transmits the color data to the intelligent feedback control module;

[0099] The intelligent feedback control module analyzes the color data to obtain the hydrogen sulfide concentration and the hydrogen sulfide concentration change gradient, calculates the basic ozone dosage using the ozone basic dosage model, calculates the ozone gradient compensation amount using the ozone gradient compensation model, and sums the basic ozone dosage and the ozone gradient compensation amount to obtain the ozone dosage. The ozone dosage data result is transmitted to the ozone catalytic oxidation treatment module;

[0100] The ozone catalytic oxidation treatment module generates a corresponding amount of ozone and reduces the concentration of hydrogen sulfide ≥10 ppm to 1 ppm within 30 seconds under the action of the honeycomb MnO2-CeO2-Pt ozone catalyst;

[0101] The ozone basic dosing model includes:

[0102]

[0103] Where: Q base is the basic dosage of ozone, m 3 / h;

[0104] V is the flow rate of electroplating waste gas, m 3 / h;

[0105] is the concentration of hydrogen sulfide, ppm;

[0106] η is the catalytic efficiency of the honeycomb MnO2-CeO2-Pt ozone catalyst, which is 0.95;

[0107] The ozone gradient compensation model includes:

[0108]

[0109] Where: Q comp is the ozone gradient compensation dosage, m 3 / h;

[0110] is the gradient of hydrogen sulfide concentration;

[0111] is the weight function, and the calculation formula is

[0112] K P is the proportional coefficient correction value, and the calculation formula is:

[0113] K P0 is the initial proportional coefficient reference value;

[0114] t is the observation time window of hydrogen sulfide gas concentration change, reflecting the response time of the intelligent feedback control module to the sudden change of hydrogen sulfide concentration, in seconds;

[0115] α is the gradient sensitivity coefficient, which is set to 0.2.

[0116] To sum up, the integrated device for hydrogen sulfide monitoring and ozone treatment in electroplating waste gas provided by the present invention monitors the concentration of hydrogen sulfide in electroplating waste gas in real time through a hydrogen sulfide real-time monitoring module, and dynamically regulates the amount of ozone generated in the ozone catalytic oxidation treatment module through an intelligent feedback control module, thereby realizing accurate monitoring of hydrogen sulfide in electroplating waste gas and integrated emergency treatment, solving the safety hazards of hydrogen sulfide waste gas, and being suitable for large-scale promotion and application in the field of electroplating.

[0117] The applicant declares that the above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention fall within the scope of protection and disclosure of the present invention.

Claims

1. An integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone, characterized in that: The integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone comprises a hydrogen sulfide real-time monitoring module, an intelligent feedback control module and an ozone catalytic oxidation treatment module connected in sequence; The hydrogen sulfide real-time monitoring module includes a color developing agent benzothiazolylazo-β-naphthol and Fe 3+ The hydrogen sulfide real-time monitoring module can detect a hydrogen sulfide concentration range of 0.1 to 100 ppm; The ozone catalytic oxidation treatment module includes a honeycomb MnO2-CeO2-Pt ozone catalyst; A fuzzy PID algorithm is provided in the intelligent feedback control module.

2. The integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone according to claim 1, characterized in that: The color developing agent benzothiazolylazo-β-naphthol and Fe 3+ The preparation method of the complex comprises the following steps: (1) adding benzothiazolylazo-β-naphthol to an ethanol-water mixed solvent, adding an alkaline solution until the mixture is completely dissolved, adding an acidic solution to adjust the pH to acidic, heating, and adding FeCl3 solution dropwise to react at a constant temperature to obtain a color-developing solution; (2) activating the porous silica microspheres with a nitric acid solution and drying them to obtain activated silica microspheres; (3) Mix the color development solution with the activated silica gel microspheres, perform ultrasound-assisted loading, and dry under nitrogen protection to obtain benzothiazolylazo-β-naphthol and Fe 3+ complex.

3. The integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone according to claim 2, characterized in that: The ethanol-water mixed solvent in step (1) is in a volume ratio of 3:1 to 4:1; Preferably, in step (1), an alkaline solution is added to adjust the pH to 8.5 to 9.0; Preferably, in step (1), an acidic solution is added to adjust the pH to 2.1 to 2.3; Preferably, the heating in step (1) is to a temperature of 60-65°C; Preferably, the concentration of the FeCl3 solution in step (1) is 0.05-0.08 mol / L; Preferably, the molar ratio of the benzothiazolylazo-β-naphthol to the FeCl3 solution in step (1) is 1:1.2 to 1:1.4; Preferably, the temperature of the isothermal reaction in step (1) is 60-65° C., and the time is 90-120 min; Preferably, the pore size of the porous silica microspheres in step (2) is 10 to 15 nm; Preferably, the concentration of the nitric acid solution in step (2) is 0.5 to 0.8 mol / L; Preferably, the drying temperature in step (2) is 100-110° C. and the drying time is 2-3 h; Preferably, the mass ratio of the color developing solution to the activated silica microspheres in step (3) is 1:5 to 1:6; Preferably, the frequency of the ultrasonic wave in the ultrasonic-assisted loading in step (3) is 40 to 50 kHz, and the time of the ultrasonic-assisted loading is 20 to 30 minutes; Preferably, the drying temperature in step (3) is 60-70°C.

4. The integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone according to any one of claims 1 to 3, characterized in that: The hydrogen sulfide real-time monitoring module also includes a dual-wavelength LED light source and a CMOS image sensor; Preferably, the dual-wavelength LED light source includes an LED light source with a wavelength of 450 nm and an LED light source with a wavelength of 550 nm.

5. The integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone according to any one of claims 1 to 4, characterized in that: The preparation method of the honeycomb MnO2-CeO2-Pt ozone catalyst comprises: mixing manganese dioxide and cerium oxide in a mass ratio of 3:1 to 4:1, loading the mixture on a cordierite honeycomb ceramic matrix, and then spraying nano-platinum particles on the surface as a co-catalyst.

6. The integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone according to any one of claims 1 to 5, characterized in that: The ozone catalytic oxidation treatment module also includes a high-pressure pulse ozone generator.

7. A method for using the integrated device for monitoring hydrogen sulfide in electroplating waste gas and treating ozone according to any one of claims 1 to 6, characterized in that: The method of use includes: The hydrogen sulfide real-time monitoring module absorbs hydrogen sulfide in electroplating exhaust gas, displays different colors, and transmits the color data to the intelligent feedback control module; The intelligent feedback control module analyzes the color data to obtain the hydrogen sulfide concentration and the hydrogen sulfide concentration change gradient, uses the fuzzy PID algorithm to obtain the ozone dosage data and transmits it to the ozone catalytic oxidation treatment module; The ozone catalytic oxidation treatment module generates a corresponding amount of ozone and reduces the concentration of hydrogen sulfide ≥10 ppm to 1 ppm within 30 seconds under the action of the honeycomb MnO2-CeO2-Pt ozone catalyst.

8. The method of use according to claim 7, characterized in that: The method for obtaining the ozone dosage using the fuzzy PID algorithm includes calculating the basic ozone dosage using the ozone basic dosage model, calculating the ozone gradient compensation amount using the ozone gradient compensation model, and the sum of the basic ozone dosage and the ozone gradient compensation amount is the ozone dosage.

9. The method of use according to claim 8, characterized in that: The ozone basic dosing model includes: Where: Q base is the basic dosage of ozone, m 3 / h; V is the flow rate of electroplating waste gas, m 3 / h; is the concentration of hydrogen sulfide, ppm; η is the catalytic efficiency of the honeycomb MnO2-CeO2-Pt ozone catalyst, which is 0.

95.

10. The method of use according to claim 8, characterized in that: The ozone gradient compensation model includes: Where: Q comp is the ozone gradient compensation dosage, m 3 / h; is the gradient of hydrogen sulfide concentration; is the weight function, and the calculation formula is K P is the proportional coefficient correction value, and the calculation formula is: K P0 is the initial proportional coefficient reference value; t is the observation time window of hydrogen sulfide gas concentration change, reflecting the response time of the intelligent feedback control module to the sudden change of hydrogen sulfide concentration, in seconds; α is the gradient sensitivity coefficient, which is set to 0.2.

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