CN114712959A - Waste gas treatment method for polymerizing waste by using oxygen-enriched water - Google Patents
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Abstract
The invention discloses a waste gas treatment method for polymerizing waste by using oxygen-rich water, belonging to the technical field of organic waste gas treatment, wherein the waste gas treatment method comprises the steps of preparing oxygen-rich water, modifying the oxygen-rich water, pretreating waste gas and treating the waste gas; preparing oxygen-enriched water, namely putting ultrapure water into a high-pressure reaction kettle, vacuumizing, introducing mixed gas of oxygen and carbon dioxide, standing to obtain primary oxygen-enriched water, performing jet acceleration on the primary oxygen-enriched water by using a jet accelerator, collecting the jet-accelerated primary oxygen-enriched water, performing current treatment on the collected primary oxygen-enriched water, and obtaining the oxygen-enriched water after the current treatment is finished; the waste gas treatment method can ensure safety and simultaneously apply the oxidation technology to the organic waste gas treatment in enterprises with higher explosion-proof level.
Description
Technical Field
The invention relates to the technical field of organic waste gas treatment, in particular to a waste gas treatment method for polymerizing waste by using oxygen-enriched water.
Background
At present, the oxidation function is most commonly used in the field of organic waste gas treatment, but OH and O required by oxidation are generated by ionization of electric energy. If enterprises and environments with higher explosion-proof levels, such as petrochemical and chemical enterprises, are encountered, equipment for generating oxides by electric energy ionization is not allowed to be used, so that how to apply the oxidation technology to organic waste gas treatment in the enterprises with higher explosion-proof levels while ensuring safety is a technical problem which is urgently needed to be solved at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a waste gas treatment method for polymerizing waste by using oxygen-enriched water, which can ensure safety and simultaneously apply an oxidation technology to the treatment of organic waste gas in enterprises with higher explosion-proof level.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the waste gas treating process with oxygen-rich water to polymerize waste includes preparing oxygen-rich water, modifying oxygen-rich water, pre-treating waste gas and treating waste gas.
Preparing oxygen-enriched water, namely placing ultrapure water in a high-pressure reaction kettle, vacuumizing the reaction kettle until the vacuum degree is 80-100Pa, introducing a mixed gas of oxygen and carbon dioxide into the reaction kettle, controlling the gas pressure of the mixed gas to be 0.7-0.8MPa, controlling the temperature of the reaction kettle to be 40-45 ℃, standing for 40-45min to obtain primary oxygen-enriched water, then carrying out jet acceleration on the primary oxygen-enriched water through a jet accelerator, collecting the primary oxygen-enriched water subjected to jet acceleration at a distance of 1-1.5km from the jet accelerator, then carrying out current treatment on the collected primary oxygen-enriched water, and obtaining the oxygen-enriched water after the current treatment is finished;
the volume ratio of oxygen to carbon dioxide in the mixed gas is 10: 1-1.5;
in the current treatment, the current is 10-15A, and the time of the current treatment is 30-35 min.
The oxygen-enriched water is modified, the oxygen-enriched water and poly (diallyldimethylammonium chloride) are placed in a high-pressure reaction kettle, the reaction kettle is vacuumized until the vacuum degree is 100-120Pa, then oxygen is introduced until the gas pressure is 1-1.2MPa, the temperature of the reaction kettle is controlled to be 20-25 ℃, the reaction kettle is kept stand for 35-40min to obtain primary modified oxygen-enriched water, then the primary modified oxygen-enriched water is subjected to high-frequency electromagnetic oscillation, and the modified oxygen-enriched water is obtained after the high-frequency electromagnetic oscillation treatment;
the mass ratio of the oxygen-enriched water to the poly (diallyldimethylammonium chloride) is 200: 3-5.
The wavelength in the high-frequency electromagnetic oscillation is 10-12mm, the frequency is 1000-1200MHz, and the time for the high-frequency electromagnetic oscillation treatment is 10-15 min;
the waste gas is pretreated, and the organic waste gas is treated by 70-80m3Introducing the flow of/h into a preprocessor for filtering to obtain filtered organic waste gas;
the filter material in the preprocessor is modified volcanic rock, and the height of the filter material is 1-1.2 m;
the preparation method of the modified volcanic rock comprises the following steps: crushing the volcanic rock to the particle size of 5-6mm to obtain volcanic rock particles, then placing the volcanic rock particles at-20 ℃ to-15 ℃ for freezing treatment for 35-40min to obtain the frozen volcanic rock particles, then placing the frozen volcanic rock particles at 600-620 ℃ for calcining for 40-50min, and then placing the particles at 780-800 ℃ for calcining for 30-40min to obtain the modified volcanic rock;
the composition of the organic waste gas comprises: h2S 2300-2500mg/m3，NH3 1600-1900mg/m3Methyl mercaptan 200-230mg/m3Dimethyl sulfide 60-80mg/m3Ethanethiol 90-110mg/m3Volatile organic 5200-5500mg/m3。
The waste gas treatment comprises the steps of introducing the filtered organic waste gas into an absorption tower, using modified oxygen-enriched water as absorption liquid in the absorption tower, and controlling the flow of the filtered organic waste gas to be 65-75m3Maintaining the normal temperature and the normal pressure in the absorption tower, and absorbing by absorption liquid in the absorption tower to obtain treated organic waste gas;
the composition of the treated organic waste gas comprises: h2S 0.2-0.5mg/m3，NH3 0.1-0.3mg/m3Methyl mercaptan 0-0.2mg/m3Dimethyl sulfide 0.3-0.7mg/m3Ethanethiol 1-2mg/m365-110mg/m of volatile organic compound3。
Compared with the prior art, the invention has the beneficial effects that:
(1) the waste gas treatment method for polymerizing waste by using the oxygen-rich water has high safety in the preparation and modification of the oxygen-rich water and the treatment of waste gas;
(2) the waste gas treatment method for polymerizing waste by using the oxygen-enriched water can avoid the use of electric energy ionization in the preparation of the oxygen-enriched water, so that the oxidation technology is used for treating organic waste gas in enterprises with higher explosion-proof level;
(3) the waste gas treatment method for polymerizing waste by using oxygen-enriched water has high treatment efficiency, and H in the waste gas treated by the waste gas treatment method is high2The S content is 0.2-0.5mg/m3，NH3The content of (B) is 0.1-0.3mg/m3The content of methyl mercaptan is 0-0.2mg/m3The content of dimethyl sulfide is 0.3-0.7mg/m3The content of ethanethiol is 1-2mg/m3The content of volatile organic compounds is 65-110mg/m3。
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, specific embodiments of the present invention will now be described.
Example 1
The waste gas treatment method for polymerizing waste by using oxygen-enriched water specifically comprises the following steps:
1. preparing oxygen-enriched water: putting ultrapure water into a high-pressure reaction kettle, vacuumizing the reaction kettle until the vacuum degree is 80Pa, introducing mixed gas of oxygen and carbon dioxide into the reaction kettle, controlling the gas pressure of the mixed gas to be 0.7MPa, controlling the temperature of the reaction kettle to be 40 ℃, standing for 40min to obtain primary oxygen-enriched water, then performing jet acceleration on the primary oxygen-enriched water through a jet accelerator, collecting the primary oxygen-enriched water subjected to jet acceleration at a position 1km away from the jet accelerator, performing current treatment on the collected primary oxygen-enriched water, controlling the current to be 10A, controlling the time of the current treatment to be 30min, and finishing the current treatment to obtain the oxygen-enriched water;
the volume ratio of oxygen to carbon dioxide in the mixed gas is 10:1.
2. Modifying oxygen-enriched water: placing oxygen-enriched water and poly (diallyldimethylammonium chloride) in a high-pressure reaction kettle, vacuumizing the reaction kettle until the vacuum degree is 100Pa, introducing oxygen until the gas pressure is 1MPa, controlling the temperature of the reaction kettle to be 20 ℃, standing for 35min to obtain primary modified oxygen-enriched water, performing high-frequency electromagnetic oscillation on the primary modified oxygen-enriched water, controlling the wavelength of the high-frequency electromagnetic oscillation to be 10mm and the frequency to be 1000MHz, controlling the time of the high-frequency electromagnetic oscillation to be 10min, and finishing the high-frequency electromagnetic oscillation treatment to obtain the modified oxygen-enriched water;
the mass ratio of the oxygen-enriched water to the poly diallyl dimethyl ammonium chloride is 200: 3.
3. Waste gas pretreatment: the organic waste gas is heated to 70m3Introducing the flow of/h into a preprocessor for filtering to obtain filtered organic waste gas;
the filter material in the preprocessor is modified volcanic rock, and the height of the filter material is 1 m;
the preparation method of the modified volcanic rock comprises the following steps: crushing volcanic rock to 5mm in particle size to obtain volcanic rock particles, freezing the volcanic rock particles at-20 ℃ for 35min to obtain frozen volcanic rock particles, calcining the frozen volcanic rock particles at 600 ℃ for 40min, and calcining at 780 ℃ for 30min to obtain modified volcanic rock;
the composition of the organic waste gas comprises: h2S 2300mg/m3，NH3 1600mg/m3Methyl mercaptan of 200mg/m3Dimethyl sulfide 60mg/m3Ethanethiol 90mg/m35200mg/m of volatile organic compound3。
4. Waste gas treatment: introducing the filtered organic waste gas into an absorption tower, using the modified oxygen-enriched water as absorption liquid in the absorption tower, and controlling the flow of the filtered organic waste gas to be 65m3Maintaining the normal temperature and the normal pressure in the absorption tower, and absorbing by absorption liquid in the absorption tower to obtain treated organic waste gas;
the composition of the treated organic waste gas comprises: h2S 0.2mg/m3，NH3 0.1mg/m3Methyl mercaptan 0mg/m3Dimethyl sulfide 0.3mg/m3Ethanethiol 1mg/m3Volatile organic 65mg/m3。
Example 2
The waste gas treatment method for polymerizing waste by using oxygen-enriched water specifically comprises the following steps:
1. preparing oxygen-enriched water: putting ultrapure water into a high-pressure reaction kettle, vacuumizing the reaction kettle until the vacuum degree is 90Pa, introducing mixed gas of oxygen and carbon dioxide into the reaction kettle, controlling the gas pressure of the mixed gas to be 0.75MPa, controlling the temperature of the reaction kettle to be 42 ℃, standing for 42min to obtain primary oxygen-enriched water, then performing jet acceleration on the primary oxygen-enriched water through a jet accelerator, collecting the primary oxygen-enriched water subjected to jet acceleration at a position 1.2km away from the jet accelerator, performing current treatment on the collected primary oxygen-enriched water, controlling the current to be 12A, controlling the current treatment time to be 32min, and finishing the current treatment to obtain the oxygen-enriched water;
the volume ratio of oxygen to carbon dioxide in the mixed gas is 10: 1.2.
2. Modifying oxygen-enriched water: placing oxygen-enriched water and poly (diallyldimethylammonium chloride) in a high-pressure reaction kettle, vacuumizing the reaction kettle until the vacuum degree is 110Pa, introducing oxygen until the gas pressure is 1.1MPa, controlling the temperature of the reaction kettle to be 22 ℃, standing for 37min to obtain primary modified oxygen-enriched water, then performing high-frequency electromagnetic oscillation on the primary modified oxygen-enriched water, controlling the wavelength of the high-frequency electromagnetic oscillation to be 11mm, the frequency to be 1100MHz, controlling the time of the high-frequency electromagnetic oscillation to be 12min, and finishing the high-frequency electromagnetic oscillation treatment to obtain the modified oxygen-enriched water;
the mass ratio of the oxygen-enriched water to the poly (diallyldimethylammonium chloride) is 200: 4.
3. Waste gas pretreatment: the organic waste gas is heated to 75m3Introducing the flow of/h into a preprocessor for filtering to obtain filtered organic waste gas;
the filter material in the preprocessor is modified volcanic rock, and the height of the filter material is 1.1 m;
the preparation method of the modified volcanic rock comprises the following steps: crushing volcanic rock to 5.5mm in particle size to obtain volcanic rock particles, then placing the volcanic rock particles at-17 ℃ for freezing treatment for 37min to obtain the frozen volcanic rock particles, then placing the frozen volcanic rock particles at 610 ℃ for calcining for 45min, and then placing the particles at 790 ℃ for calcining for 35min to obtain modified volcanic rock;
the composition of the organic waste gas comprises: h2S 2450mg/m3，NH3 1800mg/m3Methyl mercaptan 210mg/m3Dimethyl sulfide 65mg/m3105mg/m of ethanethiol35400mg/m volatile organic compound3。
4. Waste gas treatment: introducing the filtered organic waste gas into an absorption tower, using the modified oxygen-enriched water as absorption liquid in the absorption tower, and controlling the flow of the filtered organic waste gas to be 70m3Maintaining the normal temperature and the normal pressure in the absorption tower, and obtaining treated organic waste gas after absorption by absorption liquid in the absorption tower;
the composition of the treated organic waste gas comprises: h2S 0.4mg/m3，NH3 0.2mg/m3Methyl mercaptan of 0.2mg/m3Dimethyl sulfide 0.5mg/m3Ethanethiol 2mg/m3Volatile organic 80mg/m3。
Example 3
The waste gas treatment method for polymerizing waste by using oxygen-enriched water specifically comprises the following steps:
1. preparing oxygen-enriched water: putting ultrapure water into a high-pressure reaction kettle, vacuumizing the reaction kettle until the vacuum degree is 100Pa, introducing mixed gas of oxygen and carbon dioxide into the reaction kettle, controlling the gas pressure of the mixed gas to be 0.8MPa, controlling the temperature of the reaction kettle to be 45 ℃, standing for 45min to obtain primary oxygen-enriched water, then performing jet acceleration on the primary oxygen-enriched water through a jet accelerator, collecting the primary oxygen-enriched water subjected to jet acceleration at a position 1.5km away from the jet accelerator, performing current treatment on the collected primary oxygen-enriched water, controlling the current to be 15A, controlling the current treatment time to be 35min, and finishing the current treatment to obtain the oxygen-enriched water;
the volume ratio of oxygen to carbon dioxide in the mixed gas is 10: 1.5.
2. Modifying oxygen-enriched water: placing oxygen-enriched water and poly (diallyldimethylammonium chloride) in a high-pressure reaction kettle, vacuumizing the reaction kettle until the vacuum degree is 120Pa, introducing oxygen until the gas pressure is 1.2MPa, controlling the temperature of the reaction kettle to be 25 ℃, standing for 40min to obtain primary modified oxygen-enriched water, then performing high-frequency electromagnetic oscillation on the primary modified oxygen-enriched water, controlling the wavelength of the high-frequency electromagnetic oscillation to be 12mm, controlling the frequency to be 1200MHz, controlling the time of the high-frequency electromagnetic oscillation to be 15min, and finishing the high-frequency electromagnetic oscillation treatment to obtain the modified oxygen-enriched water;
the mass ratio of the oxygen-enriched water to the poly (diallyldimethylammonium chloride) is 200: 5.
3. Waste gas pretreatment: the organic waste gas is heated to 80m3Introducing the flow of/h into a preprocessor for filtering to obtain filtered organic waste gas;
the filter material in the preprocessor is modified volcanic rock, and the height of the filter material is 1.2 m;
the preparation method of the modified volcanic rock comprises the following steps: crushing volcanic rock to 6mm in particle size to obtain volcanic rock particles, freezing the volcanic rock particles at-15 ℃ for 40min to obtain frozen volcanic rock particles, calcining the frozen volcanic rock particles at 620 ℃ for 50min, and calcining the frozen volcanic rock particles at 800 ℃ for 40min to obtain modified volcanic rock;
the composition of the organic waste gas comprises: h2S 2500mg/m3，NH3 1900mg/m3Methyl mercaptan 230mg/m380mg/m dimethyl sulfide3Ethanethiol 110mg/m3Volatile organic compound 5500mg/m3。
4. Waste gas treatment: introducing the filtered organic waste gas into an absorption tower, using the modified oxygen-enriched water as absorption liquid in the absorption tower, and controlling the flow of the filtered organic waste gas to be 75m3Maintaining the normal temperature and the normal pressure in the absorption tower, and obtaining treated organic waste gas after absorption by absorption liquid in the absorption tower;
the composition of the treated organic waste gas comprises: h2S 0.5mg/m3，NH3 0.3mg/m3Methyl mercaptan 0.1mg/m3Dimethyl sulfide 0.7mg/m3Ethanethiol 1.5mg/m3Volatile organic compound 110mg/m3。
Comparative example 1
The method for treating waste gas by polymerizing waste by using oxygen-rich water described in example 1 is different in that: in the step 1 of preparing the oxygen-enriched water, the current treatment of the collected primary oxygen-enriched water is omitted.
The composition of the organic waste gas before treatment comprises: h2S 2300mg/m3，NH3 1600mg/m3Methyl mercaptan of 200mg/m3Dimethyl sulfide 60mg/m3Ethanethiol 90mg/m3Volatile organic 5200mg/m3。
The composition of the treated organic waste gas comprises: h2S 120mg/m3，NH3 55mg/m3Methyl mercaptan of 12mg/m3Dimethyl sulfide 6.5mg/m3Ethanethiol 4mg/m3640mg/m of volatile organic compound3。
Comparative example 2
The method for treating waste gas by polymerizing waste by using oxygen-enriched water in example 1 is characterized in that: the oxygen-enriched water modification in the step 2 is omitted.
The composition of the organic waste gas before treatment comprises: h2S 2300mg/m3，NH3 1600mg/m3Methyl mercaptan of 200mg/m3Dimethyl sulfide 60mg/m3Ethanethiol 90mg/m3Volatile organic 5200mg/m3。
The composition of the treated organic waste gas comprises: h2S 45mg/m3，NH3 28mg/m3Methyl mercaptan of 9mg/m317mg/m dimethyl sulfide3Ethanethiol 6mg/m3Volatile organic 410mg/m3。
Comparative example 3
The method for treating waste gas by polymerizing waste by using oxygen-enriched water in example 1 is characterized in that: in the step 3, volcanic rock particles with the particle size of 5mm are used for replacing modified volcanic rock in the waste gas pretreatment step.
The composition of the organic waste gas before treatment comprises: h2S 2300mg/m3，NH3 1600mg/m3Methyl mercaptan of 200mg/m3Dimethyl sulfide 60mg/m3Ethanethiol 90mg/m3Of volatile organic compoundsObject 5200mg/m3。
The composition of the treated organic waste gas comprises: h2S 12mg/m3，NH3 1.4mg/m3Methyl mercaptan 2.8mg/m3Dimethyl sulfide 5.5mg/m3Ethanethiol 2.9mg/m3Volatile organic 150mg/m3。
All percentages used in the present invention are mass percentages unless otherwise indicated.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The waste gas treatment method for polymerizing waste by using oxygen-rich water is characterized by comprising the steps of preparing oxygen-rich water, modifying the oxygen-rich water, pretreating waste gas and treating the waste gas;
the preparation method comprises the steps of placing ultrapure water in a high-pressure reaction kettle, vacuumizing the reaction kettle until the vacuum degree is 80-100Pa, introducing mixed gas of oxygen and carbon dioxide into the reaction kettle, controlling the gas pressure of the mixed gas to be 0.7-0.8MPa, controlling the temperature of the reaction kettle to be 40-45 ℃, standing for 40-45min to obtain primary oxygen-enriched water, then carrying out jet acceleration on the primary oxygen-enriched water through a jet accelerator, collecting the primary oxygen-enriched water subjected to jet acceleration at a distance of 1-1.5km from the jet accelerator, carrying out current treatment on the collected primary oxygen-enriched water, and obtaining the oxygen-enriched water after the current treatment is finished.
2. The method for treating exhaust gas by polymerizing waste with oxygen-rich water according to claim 1, wherein the volume ratio of oxygen to carbon dioxide in the mixed gas is 10:1 to 1.5.
3. The method as claimed in claim 1, wherein the current is 10-15A for 30-35 min.
4. The method as claimed in claim 1, wherein the step of modifying the oxygen-enriched water comprises placing the oxygen-enriched water and poly (diallyldimethylammonium chloride) in a high-pressure reactor, vacuumizing the reactor to a vacuum degree of 100 and 120Pa, introducing oxygen to a gas pressure of 1-1.2MPa, controlling the temperature of the reactor to 20-25 ℃, standing for 35-40min to obtain primary modified oxygen-enriched water, and performing high-frequency electromagnetic oscillation on the primary modified oxygen-enriched water to obtain the modified oxygen-enriched water after the high-frequency electromagnetic oscillation treatment is finished.
5. The method for treating exhaust gas by polymerizing waste with oxygen-rich water according to claim 4, wherein the mass ratio of the oxygen-rich water to the poly (diallyldimethylammonium chloride) is 200: 3-5.
6. The method as claimed in claim 4, wherein the wavelength of the high frequency electromagnetic oscillation is 10-12mm, the frequency is 1000-1200MHz, and the time of the high frequency electromagnetic oscillation treatment is 10-15 min.
7. The method as claimed in claim 1, wherein the waste gas is pre-treated by mixing organic waste gas at 70-80m3And introducing the flow of/h into a preprocessor for filtering to obtain filtered organic waste gas.
8. The method as claimed in claim 7, wherein the filter material in the pre-treater is modified volcanic rock with a height of 1-1.2 m.
9. The method for treating exhaust gas by polymerizing waste with oxygen-rich water according to claim 8, wherein the modified volcanic rock is prepared by: crushing the volcanic rock to the particle size of 5-6mm to obtain volcanic rock particles, then placing the volcanic rock particles at-20 ℃ to-15 ℃ for freezing treatment for 35-40min to obtain the frozen volcanic rock particles, then placing the frozen volcanic rock particles at 600-620 ℃ for calcining for 40-50min, and then placing at 780-800 ℃ for calcining for 30-40min to obtain the modified volcanic rock.
10. The method as claimed in claim 1, wherein the waste gas treatment comprises introducing the filtered organic waste gas into an absorption tower, using the modified oxygen-rich water as an absorption liquid, and controlling the flow rate of the filtered organic waste gas to 65-75m3And h, keeping the normal temperature and the normal pressure in the absorption tower, and absorbing by the absorption liquid in the absorption tower to obtain the treated organic waste gas.
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Citations (17)
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