Method for purifying and absorbing harmful substances and purification and absorption system using the same

Abstract

The application discloses a harmful substance purification and absorption method and a purification and absorption system using the same. The method comprises the following steps: dissolving the harmful substance in a solvent in a reaction kettle, heating and gasifying the harmful substance through a heating mechanism, and then reacting with nitrogen gas input from a gas input end of the reaction kettle to obtain a first gas; inputting the first gas into a condenser, cooling and liquefying the solvent in the first gas through the condenser, and returning the solvent to the reaction kettle through a feedback return flow end of the condenser and a return flow input end of the reaction kettle; filtering the solvent in the first gas to obtain gasified harmful substance, taking the gasified harmful substance as a second gas; inputting the second gas into a spray purification tower, and outputting the second gas after neutralization reaction with a spraying solution in the spray purification tower. The system comprises the reaction kettle, the condenser and the spray purification tower. The harmful substance purification and absorption method and the purification and absorption system using the same solve the problem of poor purification effect of the existing purification and absorption mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of substance purification, in particular to a harmful substance purification and absorption method and a purification and absorption system using the same. BACKGROUND

[0002] In the process of industrial production, after a series of chemical reactions, the product is obtained, and harmful substances are also produced. These pollutants are not only harmful to the human body, but also some are carcinogenic substances. Large emissions also have a serious impact on the local environment, so they need to be treated in time. However, due to the stable structure of these harmful substances, they are not easy to degrade, which brings great difficulty to purification treatment. SUMMARY

[0003] In order to overcome the defects existing in the prior art, one purpose of the present application is to provide a harmful substance purification and absorption method to solve the above problems.

[0004] In order to overcome the defects existing in the prior art, another purpose of the present application is to provide a harmful substance purification and absorption system to solve the above problems.

[0005] The technical scheme adopted by the present application to solve its technical problems is: a harmful substance purification and absorption method, comprising the following steps:

[0006] S1: Dissolve the harmful substance in the solvent in the reaction kettle, and heat and gasify by the heating mechanism, then react with the nitrogen gas input from the gas input end of the reaction kettle to obtain a first gas;

[0007] S2: The first gas is input to the condenser, the gaseous solvent in the first gas is cooled and liquefied and returned to the reaction kettle through the feedback reflux end of the condenser and the reflux input end of the reaction kettle, and the gaseous solvent is filtered from the first gas to obtain gaseous harmful substances, and the gaseous harmful substances are used as a second gas;

[0008] S3: The second gas is input to the spray purification tower, and the second gas is output after neutralization reaction with the spray solution in the spray purification tower.

[0009] It is worth noting that the step S1 includes: placing the harmful substance in the solvent in the reaction kettle, turning on the stirring mechanism, and stirring the harmful substance by the stirring blade of the stirring mechanism to dissolve the harmful substance in the solvent in the reaction kettle.

[0010] Specifically, the step S2 includes: adjusting the cooling temperature of the condenser, so that the cooling temperature is lower than the liquefaction temperature of the gaseous solvent in the first gas, and greater than the liquefaction temperature of the gaseous harmful substance in the first gas.

[0011] Preferably, step S3 includes: the spray solution stored in the spray solution storage section of the spray purification tower is transported to the spray reaction section located above the spray solution storage section by a circulation pump; after the second gas is input into the spray reaction section of the spray purification tower, it undergoes a neutralization reaction with the spray solution and is output; the remaining spray solution falls into the spray solution storage section.

[0012] Optionally, step S3 further includes: the second gas is output from the condenser, input into the vacuum buffer tank, and then input into the spray purification tower via a vacuum pump.

[0013] It is worth noting that step S3 further includes: the second gas after neutralization reaction with the spray solution is input into the activated carbon adsorption box, and then output to the outside through a centrifugal fan.

[0014] Specifically, a hazardous substance purification and absorption system, using the aforementioned hazardous substance purification and absorption method, includes a reaction vessel, a condenser, and a spray purification tower; the reaction vessel is provided with a gas input end for inputting nitrogen gas; a heating mechanism is provided inside the reaction vessel; the output end of the reaction vessel is connected to the input end of the condenser, and the feedback reflux end of the condenser is connected to the reflux input end of the reaction vessel; the output end of the condenser is connected to the spray input end of the spray purification tower, and the spray output end of the spray purification tower is connected to the outside.

[0015] Optionally, the hazardous substance purification and absorption system may further include a circulation pump;

[0016] The spray purification tower is provided with a spray solution storage section and a spray reaction section. The spray solution storage section is located below the spray reaction section and is connected to the spray reaction section. The spray solution storage section is provided with a circulation output end, and the spray reaction section is provided with a circulation input end. The spray solution storage section is connected to the input end of the circulation pump through the circulation output end, and the output end of the circulation pump is connected to the spray reaction section through the circulation input end.

[0017] The spray input end of the spray purification tower is located on the lower side of the spray reaction section, and the spray output end of the spray purification tower is located on the upper side of the spray reaction section.

[0018] Preferably, the harmful substance purification and absorption system further includes a stirring mechanism, which includes a stirring motor and stirring blades. The output shaft of the stirring motor is fixedly connected to the stirring blades. The stirring motor is disposed on the outer wall of the reactor, and the stirring blades are disposed inside the reactor.

[0019] It is worth noting that the hazardous substance purification and absorption system also includes a vacuum buffer tank, a vacuum pump, an activated carbon adsorption box, and a centrifugal fan;

[0020] The output end of the condenser is connected to the input end of the vacuum buffer tank, the output end of the vacuum buffer tank is connected to the input end of the vacuum pump, and the output end of the vacuum pump is connected to the spray input end of the spray purification tower.

[0021] The spray output end of the spray purification tower is connected to the input end of the activated carbon adsorption box, the output end of the activated carbon adsorption box is connected to the air inlet of the centrifugal fan, and the air outlet of the centrifugal fan is connected to the outside.

[0022] The beneficial effects of this invention are as follows: In the method for purifying and absorbing harmful substances, step S1 first dissolves the harmful substances in a solvent, which facilitates heating and vaporization. Vaporization improves the efficiency of nitrogen replacement, thereby enhancing the purification effect. During the heating of the dissolved harmful substances, some solvent vaporizes. The condenser in step 2 cools and recovers this vaporized solvent, increasing the solvent concentration in the reaction vessel and ensuring the efficiency of harmful substance dissolution. The second gas after nitrogen replacement may be acidic or alkaline depending on the harmful substance. Therefore, a corresponding spray solution is sprayed from the spray purification tower to neutralize the acid before output, ensuring no environmental pollution. Attached Figure Description

[0023] Figure 1 This is a flowchart of a method for purifying and absorbing harmful substances in one embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of a hazardous substance purification and absorption system in one embodiment of the present invention;

[0025] In the diagram: 1. Reactor; 11. Gas inlet; 2. Condenser; 3. Spray purification tower; 31. Spray solution storage unit; 32. Spray reaction unit; 4. Circulating pump; 51. Stirring motor; 52. Stirring blades; 6. Vacuum buffer tank; 7. Vacuum pump; 8. Activated carbon adsorption box; 9. Centrifugal fan. Detailed Implementation

[0026] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1 and 2As shown, a method for purifying and absorbing harmful substances includes the following steps:

[0028] S1: The harmful substance is dissolved in the solvent in the reactor 1 and heated and vaporized by the heating mechanism. Then it reacts with the nitrogen gas input from the gas input terminal 11 of the reactor 1 to obtain the first gas.

[0029] S2: The first gas is input into the condenser 2. The solvent after vaporization in the first gas is cooled and liquefied and then returned to the reactor 1 through the feedback reflux end of the condenser 2 and the reflux input end of the reactor 1. The vaporized harmful substance is obtained after filtering the vaporized solvent from the first gas. The vaporized harmful substance is used as the second gas.

[0030] S3: The second gas is input into the spray purification tower 3, and the second gas is output after neutralization reaction with the spray solution in the spray purification tower 3.

[0031] In the aforementioned method for purifying and absorbing hazardous substances, step S1 first dissolves the hazardous substances in a solvent, which facilitates heating and vaporization. Vaporization improves the efficiency of nitrogen replacement, thereby enhancing the purification effect. During the heating of the dissolved hazardous substances, some solvent vaporizes. The condenser 2 in step 2 cools and recovers this vaporized solvent, increasing the solvent concentration in the reaction vessel 1 and ensuring efficient dissolution of the hazardous substances. The second gas after nitrogen replacement may be acidic or alkaline depending on the hazardous substance. Therefore, a corresponding spray solution is sprayed from the spray purification tower 3 to neutralize the gas before output, ensuring no environmental pollution. For example, if the second gas is acidic, an alkaline spray solution is used for neutralization; conversely, if the second gas is alkaline, an acidic spray solution is used.

[0032] In some embodiments, step S1 includes: placing the hazardous substance in a solvent within the reaction vessel 1, activating the stirring mechanism, and stirring the hazardous substance using the stirring blades 52 of the stirring mechanism to dissolve the hazardous substance in the solvent within the reaction vessel 1. The stirring by the stirring blades 52 improves the efficiency of dissolving the hazardous substance.

[0033] It is worth noting that step S2 includes: adjusting the cooling temperature of the condenser 2 so that the cooling temperature is lower than the liquefaction temperature of the solvent vaporized in the first gas, but higher than the liquefaction temperature of the harmful substances vaporized in the first gas. This ensures that only the solvent vaporized in the first gas is liquefied, while the harmful substances vaporized in the first gas remain in a gaseous state and are then output from the condenser 2.

[0034] Specifically, step S3 includes: the spray solution stored in the spray solution storage section 31 of the spray purification tower 3 is transported to the spray reaction section 32 located above the spray solution storage section 31 via the circulation pump 4; the second gas is input into the spray reaction section 32 of the spray purification tower 3, where it undergoes a neutralization reaction with the spray solution and is output; the remaining spray solution falls back into the spray solution storage section 31. The circulation pump 4 enables the reuse of the spray solution, reducing costs.

[0035] Preferably, step S3 further includes: the second gas is output from the condenser 2, input into the vacuum buffer tank 6, and then input into the spray purification tower 3 via the vacuum pump 7. The vacuum buffer tank 6 is used to buffer pressure and prevent the second gas from backflowing. When the vacuum pump 7 is working, it can pump the second gas in a directed manner to the spray purification tower 3, thereby reacting with the spray solution in the spray purification tower 3.

[0036] Optionally, step S3 further includes: the second gas, after neutralization reaction with the spray solution, is input into the activated carbon adsorption box 8, and then output to the outside via a centrifugal fan 9. The activated carbon adsorption box 8 has disinfection and deodorization functions, thereby further purifying the second gas. The purified second gas is then transported to the outside via the centrifugal fan 9, thus completing the entire process.

[0037] In some embodiments, a hazardous substance purification and absorption system, using the aforementioned hazardous substance purification and absorption method, includes a reaction vessel 1, a condenser 2, and a spray purification tower 3. The reaction vessel 1 is provided with a gas input terminal 11 for inputting nitrogen gas. A heating mechanism is installed inside the reaction vessel 1. The output terminal of the reaction vessel 1 is connected to the input terminal of the condenser 2, and the feedback reflux terminal of the condenser 2 is connected to the reflux input terminal of the reaction vessel 1. The output terminal of the condenser 2 is connected to the spray input terminal of the spray purification tower 3, and the spray output terminal of the spray purification tower 3 is connected to the outside environment. In this embodiment, the heating mechanism is a temperature control module, which can adjust the heating temperature according to the different vaporization temperatures of the added hazardous substances, thereby avoiding excessive vaporization during heating, which would lead to waste, increased energy consumption, and increased production costs.

[0038] It is worth noting that the harmful substance purification and absorption system also includes a circulation pump 4;

[0039] The spray purification tower 3 is provided with a spray solution storage section 31 and a spray reaction section 32. The spray solution storage section 31 is located below the spray reaction section 32 and is connected to the spray reaction section 32. The spray solution storage section 31 has a circulation output end, and the spray reaction section 32 has a circulation input end. The spray solution storage section 31 is connected to the input end of the circulation pump 4 through the circulation output end, and the output end of the circulation pump 4 is connected to the spray reaction section 32 through the circulation input end. In this embodiment, the circulation output end is located below the spray solution storage section 31, and the circulation input end is located above the spray reaction section 32. Thus, after the spray solution is input from the circulation input end and sprayed out, it will fall into the spray solution storage section 31 located below the spray reaction section 32 due to gravity, thereby realizing the recovery of the spray solution.

[0040] The spray input end of the spray purification tower 3 is located below the spray reaction section 32, and the spray output end of the spray purification tower 3 is located above the spray reaction section 32. In this way, after the second gas enters the spray reaction section 32, its movement path is extended, allowing the second gas to fully contact the spray solution.

[0041] Specifically, the hazardous substance purification and absorption system further includes a stirring mechanism, which comprises a stirring motor 51 and stirring blades 52. The output shaft of the stirring motor 51 is fixedly connected to the stirring blades 52. The stirring motor 51 is disposed on the outer wall of the reaction vessel 1, and the stirring blades 52 are disposed inside the reaction vessel 1. In this embodiment, the stirring blades 52 are disposed on the central axis of the reaction vessel 1, thereby enabling uniform stirring of the hazardous substances. In use, the stirring motor 51 is started, and the output shaft of the stirring motor 51 drives the stirring blades 52 to rotate, thus achieving the stirring purpose.

[0042] Preferably, the harmful substance purification and absorption system further includes a vacuum buffer tank 6, a vacuum pump 7, an activated carbon adsorption box 8, and a centrifugal fan 9;

[0043] The output end of the condenser 2 is connected to the input end of the vacuum buffer tank 6, the output end of the vacuum buffer tank 6 is connected to the input end of the vacuum pump 7, and the output end of the vacuum pump 7 is connected to the spray input end of the spray purification tower 3.

[0044] The spray output end of the spray purification tower 3 is connected to the input end of the activated carbon adsorption box 8, the output end of the activated carbon adsorption box 8 is connected to the air inlet of the centrifugal fan 9, and the air outlet of the centrifugal fan 9 is connected to the outside.

[0045] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A method for purifying and absorbing harmful substances, characterized in that, Its hazardous substance purification and absorption system includes a reaction vessel, a condenser, a spray purification tower, a circulating pump, a stirring mechanism, a vacuum buffer tank, a vacuum pump, an activated carbon adsorption box, and a centrifugal fan; the reaction vessel is equipped with a gas input end for inputting nitrogen gas; a heating mechanism is installed inside the reaction vessel; the output end of the reaction vessel is connected to the input end of the condenser, and the feedback reflux end of the condenser is connected to the reflux input end of the reaction vessel; the output end of the condenser is connected to the spray input end of the spray purification tower, and the spray output end of the spray purification tower is connected to the outside environment; The spray purification tower is provided with a spray solution storage section and a spray reaction section. The spray solution storage section is located below the spray reaction section and is connected to the spray reaction section. The spray solution storage section is provided with a circulation output end, and the spray reaction section is provided with a circulation input end. The spray solution storage section is connected to the input end of the circulation pump through the circulation output end, and the output end of the circulation pump is connected to the spray reaction section through the circulation input end. The spray input end of the spray purification tower is located on the lower side of the spray reaction section, and the spray output end of the spray purification tower is located on the upper side of the spray reaction section. The stirring mechanism includes a stirring motor and stirring blades. The output shaft of the stirring motor is fixedly connected to the stirring blades. The stirring motor is disposed on the outer wall of the reaction vessel, and the stirring blades are disposed inside the reaction vessel. The output end of the condenser is connected to the input end of the vacuum buffer tank, the output end of the vacuum buffer tank is connected to the input end of the vacuum pump, and the output end of the vacuum pump is connected to the spray input end of the spray purification tower. The spray output end of the spray purification tower is connected to the input end of the activated carbon adsorption box, the output end of the activated carbon adsorption box is connected to the air inlet of the centrifugal fan, and the air outlet of the centrifugal fan is connected to the outside. The method includes the following steps: S1: The harmful substance is dissolved in the solvent in the reactor and heated and vaporized by the heating mechanism. Then it reacts with the nitrogen gas introduced from the gas inlet of the reactor to obtain the first gas. S2: The first gas is input into the condenser. The solvent after vaporization in the first gas is cooled and liquefied and then returned to the reactor through the feedback reflux end of the condenser and the reflux input end of the reactor. The vaporized harmful substance is obtained after filtering the vaporized solvent from the first gas. The vaporized harmful substance is used as the second gas. S3: The second gas is input into the spray purification tower, and the second gas is output after neutralization reaction with the spray solution in the spray purification tower; The spray solution stored in the spray solution storage section of the spray purification tower is transported to the spray reaction section located above the spray solution storage section by a circulation pump. After the second gas is input into the spray reaction section of the spray purification tower, it undergoes a neutralization reaction with the spray solution and is output. The remaining spray solution falls into the spray solution storage section.

2. The method for purifying and absorbing harmful substances according to claim 1, characterized in that: Step S1 includes: placing the harmful substance in the solvent inside the reaction vessel, turning on the stirring mechanism, stirring the harmful substance by the stirring blades of the stirring mechanism, and dissolving the harmful substance in the solvent inside the reaction vessel.

3. The method for purifying and absorbing harmful substances according to claim 2, characterized in that: Step S2 includes: adjusting the cooling temperature of the condenser so that the cooling temperature is lower than the liquefaction temperature of the solvent after vaporization in the first gas, and higher than the liquefaction temperature of the harmful substances after vaporization in the first gas.

4. The method for purifying and absorbing harmful substances according to claim 3, characterized in that: Step S3 further includes: the second gas is output from the condenser, input into the vacuum buffer tank, and then input into the spray purification tower through the vacuum pump.

5. The method for purifying and absorbing harmful substances according to claim 4, characterized in that: Step S3 further includes: the second gas after neutralization reaction with the spray solution is input into the activated carbon adsorption box, and then output to the outside through a centrifugal fan.

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