CN216418888U - Chemical industry is tertiary spray set for tail gas treatment - Google Patents
Chemical industry is tertiary spray set for tail gas treatment Download PDFInfo
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- CN216418888U CN216418888U CN202122545367.XU CN202122545367U CN216418888U CN 216418888 U CN216418888 U CN 216418888U CN 202122545367 U CN202122545367 U CN 202122545367U CN 216418888 U CN216418888 U CN 216418888U
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Abstract
The utility model discloses a chemical industry is tertiary spray set for tail gas treatment, include: the acid spraying component, the oxidation spraying component and the alkali spraying component are sequentially connected in series on the exhaust pipeline, and the exhaust pipeline is also provided with a ventilator; the oxidation spray assembly comprises: an oxidant charging barrel for storing an oxidant; the feed inlet of the material melting device is communicated with a water source and an oxidant feeding barrel; and the material melting device is communicated with a liquid inlet pipe of the spray tower, or the material melting device and liquid outlets at the bottom of the spray tower are communicated with the liquid inlet pipe of the spray tower. The three-stage spraying device for treating the chemical tail gas is sequentially provided with an acid spraying assembly, an oxidation spraying assembly and an alkali spraying assembly, alkaline gas such as ammonia reacts with acid, reducing gas such as hydrogen sulfide and sulfur dioxide reacts with oxide to generate acidic substance or acidic gas, and the product is neutralized with alkali.
Description
Technical Field
The utility model relates to a chemical waste gas treatment equipment field, concretely relates to chemical tail gas handles and uses tertiary spray set.
Background
The tail gas from chemical waste treatment has high concentration and large discharge, and the main components are Volatile Organic Compounds (VOCs) and ammonia (NH)3) Hydrogen sulfide (H)2S), Phosphine (PH)3) And the odor of volatile organic compounds and hydrogen sulfide is relatively large. In order to improve the working environment conditions of the staff and reduce the pollution of the surrounding environment, odor generated by each structure in the sewage station needs to be sent to a purification system for treatment. The conventional tail gas treatment process comprises the following steps: activated carbon/cotton adsorption, biological washing and absorption, plasma treatment, photocatalytic oxidation, condensation and recovery, catalytic combustion, thermal incineration and the like.
In the large-scale production of chemical waste treatment, the application range of photocatalytic oxidation treatment of tail gas is wider, but the following application defects exist: firstly, the bond energy of the tail gas component compounds is lower than the UV photon energy, the tail gas components can be cracked, the purification effect can be guaranteed, and the treatment effect of the UV photo-oxidation catalysis technology on ammonia gas in actual production is poor; secondly, the raw material composition that chemical industry waste material handled is the exact same, and same set of UV light oxygen catalytic unit fluorescent tube quantity is fixed, consequently is not suitable for the tail gas processing of different constitutions (the UV light oxygen catalytic reaction time of different components is unequal), wind speed, particulate matter, humidity, and the commonality of UV light oxygen catalytic processing tail gas is not strong promptly.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the defect that exists among the prior art, provide a chemical industry is tertiary spray set for tail gas treatment, the processing commonality that acid sprayed, chlorine dioxide sprayed and alkali sprayed tail gas in the chemical industry field is strong.
In order to realize the technical effect, the utility model discloses a technical scheme does: the utility model provides a chemical industry is tertiary spray set for tail gas treatment, includes: the acid spraying component, the oxidation spraying component and the alkali spraying component are sequentially connected in series on the exhaust pipeline, and the exhaust pipeline is also provided with a ventilator; the oxidation spray assembly comprises:
an oxidant charging barrel for storing an oxidant;
the feed inlet of the material melting device is communicated with a water source and the oxidant feeding barrel;
and the material melting device is communicated with a liquid inlet pipe of the spray tower, or the material melting device and liquid outlets at the bottom of the spray tower are communicated with the liquid inlet pipe of the spray tower.
The preferable technical scheme is that the oxidation spraying component is a chlorine dioxide spraying component.
The preferable technical scheme is that a liquid inlet pipe of the spray tower is connected with an anti-corrosion circulating pump.
The preferred technical scheme is that the ventilator is arranged in an air receiving and exhausting pipeline of the alkali spraying assembly.
The preferable technical scheme is that at least one of the spray tower of the acid spray component, the chlorine dioxide spray component and the alkali spray component is provided with a tower top demisting section.
The preferable technical scheme is that pall rings are filled in the tower top demisting section, and the diameters of the pall rings are 30-75 mm.
The preferable technical scheme is that the spray towers of the acid spray assembly, the oxidation spray assembly and the alkali spray assembly respectively comprise a nozzle, a liquid inlet pipe communicated with the nozzle, a filling section arranged below the nozzle and a liquid outlet pipeline arranged at the bottom end of the spray tower; and a liquid inlet pipe of the acid spraying assembly is communicated with the acid liquor tank, and a liquid inlet pipe of the alkali spraying assembly is communicated with the alkali liquor tank.
The utility model has the advantages and the beneficial effects that:
the three-stage spraying device for treating the chemical tail gas is sequentially provided with an acid spraying component, an oxidation spraying component and an alkali spraying component, wherein alkaline gas such as ammonia reacts with acid, reducing gas such as hydrogen sulfide and sulfur dioxide reacts with oxide to generate acidic substance or acidic gas, and the product is neutralized with alkali;
the gas treated by the three-level spraying device for chemical tail gas treatment reaches the limit value of the national relevant emission standard.
Drawings
FIG. 1 is a schematic structural diagram of a three-stage spraying device for chemical tail gas treatment in example 1;
FIG. 2 is a schematic structural diagram of a three-stage spraying device for chemical tail gas treatment according to another embodiment;
in the figure: 1. a furnace platform; 11. an air guide channel; 12. a heating element; 13. a second air guide; 2. a furnace plate; 21. a central through hole; 3. sand sealing the groove; 4. a furnace mantle; 41. an airflow guide piece; 42. a first air guide; 5. an air intake passage; a. and (5) a silicon steel coil.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Chlorine dioxide spray assembly
Chlorine dioxide is a disinfectant with strong oxidizing property, and has the advantages of wide sterilization spectrum, high sterilization speed, low use concentration, less residual quantity and less formation of toxic by-products as a fourth-generation disinfectant. Chlorine dioxide is readily soluble in water and is almost free of hydrolysis, and is capable of oxidizing volatile organic compounds in reducing gases and tail gases.
The chlorine dioxide does not react with the ammonia gas, so the ammonia group in the three-stage spraying device is neutralized with the acid liquid in the acid spraying device in advance; reacting chlorine dioxide with hydrogen sulfide to generate sulfate radicals, chloride ions and hydrogen ions; chlorine dioxide reacts with volatile organic compounds to promote decomposition, for example, with resorcinol to form organic acids, water and carbon dioxide, which is reduced to chloride ions; the tail gas discharged by the spraying component mainly comprises oxygen, nitrogen and inevitable chlorine dioxide, and the chlorine dioxide reacts with the alkali liquor in the alkali spraying component; acid gases such as carbon dioxide generated by the reaction with chlorine dioxide are absorbed by the alkali liquor, so that the emission is reduced.
The oxidant used by the oxidation spray device can be chlorine dioxide, and can also be sulfuric acid, nitric acid, potassium permanganate solution, hydrogen peroxide and the like, and the chlorine dioxide spray device is preferred. Chlorine dioxide is a safe and low-toxicity disinfectant, has no 'three-cause' effect (carcinogenesis, teratogenesis and mutagenesis), and does not generate chlorination reaction with organic matters during the disinfection process to generate organic chloride or other toxic substances which can generate 'three-cause' effect. However, chlorine dioxide is extremely strong in oxidizing power and should be avoided at high concentrations (>500 ppm). When the concentration is lower than 500ppm, the influence on the human body can be ignored, and when the concentration is lower than 100ppm, the influence on the human body can not be generated, including physiological and biochemical influences. It has no sensitization effect on skin. In fact, chlorine dioxide is conventionally used at concentrations well below 500ppm, typically only around a few tens of ppm. Therefore, chlorine dioxide is also internationally recognized as a safe, low-toxicity, green disinfectant.
Example 1
As shown in fig. 1-2, the three-stage spray device for chemical engineering tail gas treatment in example 1 includes an acid spray assembly 1 connected to a waste gas collecting device through a pipeline, an oxidation spray assembly 2 connected to an exhaust pipe of the acid spray assembly 1, and an alkali spray assembly 3 connected to an exhaust pipe of the oxidation spray assembly 2;
acid spray assembly 1, oxidation spray assembly 2 and alkali spray assembly 3 include the spray column respectively, the spray column bottom is provided with the air inlet, the top is provided with the gas vent, be provided with washing section and defogging section a from bottom to top between air inlet and the gas vent, include at least one spray unit b in the washing section, spray unit b includes nozzle b1, with the communicating feed liquor pipe b2 of nozzle b1, set up in filler section b3 of nozzle b1 below, be used for filling in filler section b3, the bottom of spray column is used for the splendid attire and admits air the reaction after reaction liquid. The liquid inlet pipe b2 is connected with the liquid outlet at the bottom end of the corresponding spray tower through a liquid inlet pump c, the acid spray assembly 1 further comprises an acid liquid tank 11, and the alkali spray assembly 3 comprises an alkali liquid tank 31. The liquid inlet pipe b2 is also communicated with the corresponding acid liquor tank 11 or alkali liquor tank 31, and acid liquor or alkali liquor is supplemented at any time. In actual production, a pH value sampling or sensor is arranged at the bottom of the spraying tower, the pH value of reaction liquid at the bottom of the spraying tower is monitored, and acid liquor or alkali liquor is controlled in real time through a control system and execution equipment such as an electromagnetic valve, a pump and the like.
The oxidation spray assembly 2 comprises an oxidant feeding barrel for storing an oxidant, the oxidant feeding barrel 21 is communicated with a material dissolving port of a material dissolving device 22, the material dissolving device 22 is also communicated with a water source, and a liquid outlet of the material dissolving device 22 is communicated with a liquid inlet pipe b2 of the spray tower through a liquid inlet pipeline. The oxidant solution is prepared in advance in the material melting device 22, so that the production safety is met, the field preparation of the oxidant solution can also reduce the loss of the oxidant caused by gas pipeline leakage, oxidant solution transmission and the like, and the utilization rate of the oxidant is improved.
The demisting section a can be specifically selected and assembled according to the water vapor content in the exhaust gas of each spray tower. Neutralization reaction heat release occurs in the acid spraying component 1 and the alkali spraying component 3, and similarly, when chlorine dioxide is used as an oxidant in the oxidation spraying component 2, oxidation reduction reaction heat release occurs, and the factors can cause the increase of the content of water vapor in the exhaust gas of the spraying tower. Because the components of the chemical tail gas are uncertain, preferably, demisting sections a are arranged in the acid spraying component 1, the oxidation spraying component 2 and the alkali spraying component 3. Demisting filler is filled in the demisting section a, for example, PP small-bore pall ring (phi 50mm) with good air permeability, high water-blocking efficiency and small airflow resistance.
In another embodiment, as shown in fig. 1, the liquid inlet pump c on the liquid inlet pipe of the spray tower is an anticorrosive circulating pump. The anti-corrosion circulating pump meets the conveying requirement of the chlorine dioxide solution.
In another embodiment, as shown in fig. 1, a ventilator is arranged in series in the air exhaust line of the alkali shower assembly 3. Compared with the condition that the ventilator 4 is connected between the spraying assemblies, the gas subjected to the three-stage spraying treatment is mainly composed of air components, so that the service life of the ventilator 4 can be prolonged.
As shown in fig. 2, in another embodiment, a circulation tank d is integrally disposed at the bottom of the spray tower of the acid spray assembly 1 and the alkali spray assembly 3, the circulation tank d is provided with corresponding acid compound and alkali compound feeding ports for feeding the solutes of the acid solution and the alkali solution, and the liquid inlet pipe b2 is connected to the liquid outlet port of the circulation tank d without providing a corresponding acid solution tank 11 or an alkali solution tank 31.
The working process is as follows:
the ventilator 4 drives the chemical tail gas to be continuously discharged from the waste gas collecting device, and the chemical tail gas enters the acid spraying component 1 from the bottom end of the spraying tower, the chemical tail gas mainly comprises air, alkaline gas and acid gas, wherein the alkaline gas such as ammonia gas reacts with the acid liquor and is absorbed by the acid liquor, and/or the gas partially dissolved in water such as chlorine and hydrogen chloride is dissolved in the acid liquor; the chemical tail gas which can not be dissolved by the acid liquor or can not react with the acid is introduced into a spray tower of the oxidation spray assembly 2, for example, hydrogen sulfide, nitric oxide and the like react with an oxidant to generate corresponding sulfate radicals, hydrogen chloride, chlorine, nitrogen dioxide and the like, the sulfate radicals are dissolved in the oxidant solution, one part of the hydrogen chloride, the chlorine and the nitrogen dioxide is dissolved in the oxidant solution, the other part of the hydrogen chloride, the chlorine and the nitrogen dioxide is discharged into a spray tank of the alkali spray assembly 3 to fully react with the alkali liquor, in addition, the gas which has smaller water solubility and can not react with the chlorine dioxide and the like also fully reacts with the alkali liquor, and finally, the air components such as oxygen, nitrogen, inert gas and the like are discharged by the ventilator 4 to be emptied.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a chemical industry is tertiary spray set for tail gas treatment which characterized in that includes: the acid spraying component, the oxidation spraying component and the alkali spraying component are sequentially connected in series on the exhaust pipeline, and the exhaust pipeline is also provided with a ventilator; the oxidation spray assembly comprises:
an oxidant charging barrel for storing an oxidant;
the feed inlet of the material melting device is communicated with a water source and the oxidant feeding barrel;
and the material melting device is communicated with a liquid inlet pipe of the spray tower, or the material melting device and liquid outlets at the bottom of the spray tower are communicated with the liquid inlet pipe of the spray tower.
2. The three-stage spraying device for chemical tail gas treatment according to claim 1, wherein the oxidation spraying component is a chlorine dioxide spraying component.
3. The three-stage spraying device for treating the chemical tail gas as claimed in claim 2, wherein a corrosion-resistant circulating pump is connected to a liquid inlet pipe of the spraying tower.
4. The three-stage spraying device for the chemical engineering tail gas treatment according to claim 1, wherein the ventilator is arranged in an air receiving exhaust pipeline of the alkali spraying assembly.
5. The three-stage spraying device for treating the chemical tail gas as claimed in claim 2, wherein the spray tower of at least one of the acid spray assembly, the chlorine dioxide spray assembly and the alkali spray assembly is provided with a tower top demisting section.
6. The three-stage spraying device for the chemical tail gas treatment according to claim 5, wherein pall rings are filled in the tower top demisting section, and the diameters of the pall rings are 30-75 mm.
7. The three-stage spraying device for treating the chemical tail gas according to claim 1 or 2, wherein the spraying towers of the acid spraying assembly, the oxidation spraying assembly and the alkali spraying assembly respectively comprise a nozzle, a liquid inlet pipe communicated with the nozzle, a filler section arranged below the nozzle and a liquid outlet pipe arranged at the bottom end of the spraying towers; and a liquid inlet pipe of the acid spraying assembly is communicated with the acid liquor tank, and a liquid inlet pipe of the alkali spraying assembly is communicated with the alkali liquor tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122545367.XU CN216418888U (en) | 2021-10-22 | 2021-10-22 | Chemical industry is tertiary spray set for tail gas treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122545367.XU CN216418888U (en) | 2021-10-22 | 2021-10-22 | Chemical industry is tertiary spray set for tail gas treatment |
Publications (1)
| Publication Number | Publication Date |
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| CN216418888U true CN216418888U (en) | 2022-05-03 |
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| CN202122545367.XU Active CN216418888U (en) | 2021-10-22 | 2021-10-22 | Chemical industry is tertiary spray set for tail gas treatment |
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| CN (1) | CN216418888U (en) |
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2021
- 2021-10-22 CN CN202122545367.XU patent/CN216418888U/en active Active
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