CN213193174U - Catalytic oxidation neutralization device for treating high-concentration waste gas of permanent violet production device - Google Patents
Catalytic oxidation neutralization device for treating high-concentration waste gas of permanent violet production device Download PDFInfo
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- CN213193174U CN213193174U CN202021829835.5U CN202021829835U CN213193174U CN 213193174 U CN213193174 U CN 213193174U CN 202021829835 U CN202021829835 U CN 202021829835U CN 213193174 U CN213193174 U CN 213193174U
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Abstract
The utility model provides a catalytic oxidation neutralization apparatus for handling permanent purple apparatus for producing high concentration waste gas belongs to permanent purple production exhaust-gas treatment technical field. Comprises a catalytic oxidation spraying neutralization tower, a permanent violet production tail gas inlet pipe, an ozone generation assembly and a circulating spraying assembly. The catalytic oxidation spraying neutralization tower is sequentially provided with a liquid caustic soda storage tank, a catalytic packing layer and a tail gas purification discharge pipe from bottom to top. The gas inlet pipe of the permanent violet production tail gas is connected with a catalytic oxidation spraying neutralization tower, and the ozone generation assembly is communicated with the bottom of the liquid caustic soda storage tank. The spraying assembly comprises a circulating spraying pump, a circulating spraying pipe and a spraying distributor. The permanent violet production tail gas from bottom to top is in reverse contact with a mixture of liquid caustic soda and ozone from top to bottom in a catalytic oxidation spraying neutralization tower for oxidation, chlorobenzene and other substances contained in the tail gas are oxidized and decomposed into carbon dioxide, hydrogen chloride and the like by the ozone, and acidic substances such as the hydrogen chloride and the like are trapped by the liquid caustic soda, so that the low-cost and high-efficiency permanent violet production tail gas treatment is realized.
Description
Technical Field
The utility model belongs to the technical field of permanent purple production waste gas treatment, concretely relates to catalytic oxidation neutralization apparatus for handling permanent purple apparatus for producing high concentration waste gas.
Background
Permanent violet RL with molecular formula C34H22Cl2N4O2The blue-violet powder is bright-colored blue-violet powder, and has high tinting strength, excellent heat resistance, excellent light fastness and excellent sublimation resistance. Can be used for coloring paint, ink, rubber and plastic and for coloring synthetic fiber stock solution.
The permanent violet RL is produced by using carbazole as main material and through alkylation and nitrationReduction, condensation, ring closing and ball milling to produce permanent violet RL. In the production process of the permanent violet RL, the tail gas from a main device contains high-concentration harmful waste gas which mainly contains chlorobenzene, o-dichlorobenzene, benzenethiol and other substances and cannot be directly discharged outside. Generally, the waste gas generated in the permanent violet RL production process is treated by an activated carbon adsorption method, a large amount of solid waste is generated by the treatment mode, the operation cost is high, the treatment efficiency is low, and the discharged tail gas is difficult to reach the standard and is discharged, so that the environmental odor is caused. In order to reduce the amount of solid waste and improve the treatment efficiency of the permanent violet tail gas, the prior art, for example, chinese patent No. 201711249513.6, provides a device and a method for treating waste gas by catalytic oxidation, and specifically discloses a method for reducing NO in waste gas by using hydrogen peroxide to be in spray contact with waste gas in the presence of an iron catalystx、SOxAnd VOCs. However, the device and the method not only need to use a large amount of hydrogen peroxide, are high in cost, but also have poor treatment effect on the permanent violet containing high-concentration organic wastes, and cannot meet the treatment requirement on the tail gas in the permanent violet production.
Disclosure of Invention
In view of this, the utility model provides a catalytic oxidation neutralization apparatus for handling permanent purple apparatus for producing high concentration waste gas to solve the technical problem that permanent purple production tail gas treatment cost is high, the treatment effeciency is low that exists among the prior art.
The utility model provides a technical scheme that its technical problem adopted is:
a catalytic oxidation neutralization device for treating high-concentration waste gas of a permanent violet production device comprises:
the catalytic oxidation spraying neutralization tower is characterized in that a liquid alkali storage tank is arranged at the bottom of the catalytic oxidation spraying neutralization tower, neutralized alkali liquor is filled in the liquid alkali storage tank, a catalytic packing layer is arranged in the middle of the catalytic oxidation spraying neutralization tower, and a purified tail gas discharge pipe is arranged at the upper part of the catalytic oxidation spraying neutralization tower;
the permanent violet production tail gas inlet pipe is connected with the catalytic oxidation spraying neutralization tower, and an inlet is positioned below the catalytic packing layer;
the outlet end of the ozone generating assembly is communicated with the bottom of the liquid caustic soda storage tank; and
the circulating spray assembly comprises a circulating spray pump, a circulating spray pipe and a spray distributor, the inlet of the circulating spray pump is communicated with the liquid caustic soda storage tank, the circulating spray pipe is connected with the outlet of the circulating spray pump, the spray distributor is arranged above the catalytic packing layer, and the feeding end of the spray distributor is connected with the circulating spray pipe.
Preferably, the catalytic packing layer comprises a plurality of catalytic packing layers which are sequentially arranged from top to bottom, a spraying interval is arranged between every two adjacent catalytic packing layers, and the spraying distributor is arranged in the spraying interval.
Preferably, the catalytic filler layer comprises a first catalytic filler layer and a second catalytic filler layer which are arranged from bottom to top, and the spraying interval is arranged between the first catalytic filler layer and the second catalytic filler layer; the spraying distributor comprises a first spraying distributor and a second spraying distributor, the first spraying distributor is arranged above the first catalytic filler layer, and the second spraying distributor is arranged above the second catalytic filler layer.
Preferably, the thickness of the first catalytic filler layer is greater than the thickness of the second catalytic filler layer.
Preferably, the supporting framework of the catalytic filler layer adopts Raschig rings.
Preferably, a purified gas demister is arranged on the purified tail gas discharge pipe.
Preferably, the tail end of the exhaust pipe for purifying the tail gas is connected with an induced draft fan.
Preferably, the outlet of the induced draft fan is connected with a tail gas deep purification device.
Preferably, the spray distributor is a tubular distributor.
According to the above technical scheme, the utility model provides a catalytic oxidation neutralization apparatus for handling permanent purple apparatus for producing high concentration waste gas, its beneficial effect is: the catalytic oxidation spraying neutralization tower is arranged, the liquid caustic soda storage tank is arranged at the bottom of the tower, neutralized liquid caustic soda is filled in the liquid caustic soda storage tank, and the liquid caustic soda storage tank is simultaneously connected with an ozone generation assembly and a circulating spraying assembly. The middle part of the catalytic oxidation spraying neutralization tower is provided with a catalytic packing layer, and the permanent violet production tail gas inlet pipe is connected below the catalytic packing layer. The permanent violet production tail gas enters the catalytic oxidation spraying neutralization tower from the permanent violet production tail gas inlet pipe, and flows upwards, the mixture of the liquid caustic soda and the ozone is distributed by the spraying distributor and flows downwards under the action of the circulating spraying assembly, the catalyst is in contact oxidation with the permanent violet production tail gas, chlorobenzene, o-dichlorobenzene, benzenethiol and other substances contained in the permanent violet production tail gas are decomposed into acid gases containing carbon dioxide, carbon monoxide, hydrogen chloride, hydrogen sulfide and the like under the strong oxidation action of ozone, the acid substances in the acid gases such as hydrogen chloride, hydrogen sulfide and the like are trapped by liquid alkali, therefore, the content of chlorobenzene, o-dichlorobenzene and benzenethiol in the high-concentration permanent violet production tail gas is effectively reduced, and the content of acidic substances is reduced, and experiments show that the conversion rate of harmful gas in the high-concentration permanent violet production tail gas reaches more than 70%. Meanwhile, acidic organic matters in the permanent violet production tail gas are collected by liquid caustic soda, return to the liquid caustic soda storage tank, and are in contact with ozone for oxidation and decomposed into substances such as carbon dioxide, and the treatment efficiency of the permanent violet production tail gas is further improved. The catalytic oxidation neutralization device for treating high-concentration waste gas of the permanent violet production device greatly reduces the content of chlorobenzene, o-dichlorobenzene and benzenethiol in the permanent violet production tail gas, improves the treatment efficiency of the permanent violet production tail gas, avoids using a large amount of active carbon, avoids generating a large amount of solid waste and reduces the production cost.
Drawings
FIG. 1 is a schematic structural diagram of a catalytic oxidation neutralization device for treating high-concentration waste gas of a permanent violet production device.
In the figure: the device comprises a catalytic oxidation neutralization device 10 for treating high-concentration waste gas of a permanent violet production device, a liquid caustic soda storage tank 110, a catalytic packing layer 120, a spraying interval 121, a first catalytic packing layer 1201, a second catalytic packing layer 1202, a purified tail gas discharge pipe 130, a purified gas demister 131, an induced draft fan 132, a tail gas inlet cavity 140, a permanent violet production tail gas inlet pipe 200, an ozone generation assembly 300, a circulating spraying assembly 400, a circulating spraying pump 410, a circulating spraying pipe 420, a spraying distributor 430, a first spraying distributor 4301, a second spraying distributor 4302 and a tail gas deep purification device 500.
Detailed Description
The following combines the drawings of the utility model to further elaborate the technical scheme and technical effect of the utility model.
Referring to fig. 1, in an embodiment, a catalytic oxidation neutralization apparatus 10 for treating high-concentration exhaust gas from a permanent violet production apparatus is used for treating high-concentration exhaust gas from a permanent violet main production apparatus (such as a reaction kettle) to reduce harmful substances including chlorobenzene, o-dichlorobenzene, thiophenol and the like in the exhaust gas. The catalytic oxidation neutralization device 10 for treating high-concentration waste gas of the permanent violet production device comprises: the system comprises a catalytic oxidation spraying neutralization tower, a permanent violet production tail gas inlet pipe 200, an ozone generation assembly 300 and a circulating spraying assembly 400, wherein a liquid caustic soda storage tank 110 is arranged at the bottom of the catalytic oxidation spraying neutralization tower, neutralized alkali liquor is filled in the liquid caustic soda storage tank 110, a catalytic packing layer 120 is arranged in the middle of the catalytic oxidation spraying neutralization tower, and a purified tail gas discharge pipe 130 is arranged at the upper part of the catalytic oxidation spraying neutralization tower. The permanent violet production tail gas inlet pipe 200 is connected with the catalytic oxidation spraying neutralization tower, and the inlet is positioned below the catalytic filler layer 120. The outlet end of the ozone generating assembly 300 is communicated with the bottom of the caustic soda liquid storage tank 110. The circulating spray assembly 400 comprises a circulating spray pump 410, a circulating spray pipe 420 and a spray distributor 430, wherein an inlet of the circulating spray pump 410 is communicated with the caustic soda storage tank 110, the circulating spray pipe 420 is connected with an outlet of the circulating spray pump 410, the spray distributor 430 is arranged above the catalytic packing layer 120, and a feeding end is connected with the circulating spray pipe 420.
Specifically, the bottom of the catalytic oxidation spray neutralization tower is the caustic soda liquid storage tank 110, and the caustic soda liquid storage tank 110 is filled with neutralized caustic soda liquid, for example, the caustic soda liquid storage tank 110 is filled with sodium hydroxide. The catalytic filler layer 120 is disposed above the liquid caustic soda storage tank 110, a tail gas inlet cavity 140 is formed by the bottom of the catalytic filler layer and the upper part of the liquid caustic soda storage tank 110, and the permanent violet production tail gas inlet pipe 200 is communicated with the tail gas inlet cavity 140. High-concentration permanent violet production tail gas from the permanent violet production device enters the tail gas inlet cavity 140 through the production tail gas inlet pipe 200, flows upwards, and passes through the catalytic filler layer 120.
The outlet end of the ozone generating component 300 is communicated with the bottom of the liquid caustic soda storage tank 110, ozone generated by the ozone generating component 300 is introduced into the liquid caustic soda storage tank 110, is partially dissolved in the neutralized liquid caustic soda of the liquid caustic soda storage tank 110, and is partially diffused from the upper part of the liquid caustic soda storage tank 110 to contact with the permanent violet production tail gas, so that organic substances in the permanent violet production tail gas are oxidized into substances such as carbon dioxide.
The inlet end of the circulating spray pump 410 is connected with the liquid caustic soda storage tank 110, the spray distributor 430 is arranged above the catalytic packing layer 120, and the feed end is connected with the circulating spray pipe 420. The circulating spray pump 410 conveys the mixed liquid of the neutralized liquid caustic soda and the ozone from the liquid caustic soda storage tank 110 into the spray distributor 430, and the mixed liquid is uniformly distributed above the catalytic filler layer 120 through the spray distributor 430. The mixed liquid of the liquid alkali and the ozone flows from top to bottom and contacts with the permanent violet production tail gas flowing from bottom to top, wherein the ozone and organic components in the permanent violet production tail gas are strongly oxidized, so that the organic components in the permanent violet production tail gas are converted into acid gases such as carbon dioxide, carbon monoxide, hydrogen chloride, hydrogen sulfide and the like, and meanwhile, acidic substances such as hydrogen chloride, hydrogen sulfide and the like in the acid gases are captured by the liquid alkali, so that the contents of chlorobenzene, o-dichlorobenzene and benzenethiol in the high-concentration permanent violet production tail gas are effectively reduced, and the content of the acidic substances is reduced. Experiments show that the conversion rate of harmful gases in the high-concentration permanent violet production tail gas reaches over 70 percent. Meanwhile, acidic organic matters in the permanent violet production tail gas are captured by the liquid caustic soda, returned to the liquid caustic soda storage tank 110, and are oxidized by contacting with ozone to be decomposed into substances such as carbon dioxide and the like, so that the treatment efficiency of the permanent violet production tail gas is further improved. The catalytic oxidation neutralization device 10 for treating high-concentration waste gas of the permanent violet production device greatly reduces the content of chlorobenzene, o-dichlorobenzene and benzenethiol in the permanent violet production tail gas, improves the treatment efficiency of the permanent violet production tail gas, avoids using a large amount of activated carbon, avoids generating a large amount of solid waste and reduces the production cost.
In order to further improve the treatment efficiency of the tail gas, in a specific embodiment, the catalytic filler layer 120 includes a plurality of catalytic filler layers sequentially arranged from top to bottom, a spraying interval 121 is provided between two adjacent catalytic filler layers, and the spraying distributor 430 is disposed in the spraying interval 121. For example, the catalytic filler layer 120 includes a first catalytic filler layer 1201 and a second catalytic filler layer 1202 arranged from bottom to top, and the spray gap 121 is provided between the first catalytic filler layer 1201 and the second catalytic filler layer 1202. The spray distributor 430 includes a first spray distributor 4301 and a second spray distributor 4302, the first spray distributor 4301 is disposed above the first catalytic packing layer 1201, and the second spray distributor 4302 is disposed above the second catalytic packing layer 1202. The first catalytic filler layer 1201 positioned on the bottom layer is a main reaction bed layer, the second catalytic filler layer 1202 positioned on the upper layer is a secondary reaction bed layer, most of organic substances contained in the permanent violet production tail gas are oxidized and decomposed in the first catalytic filler layer 1201, and the unoxidized and decomposed part is oxidized and decomposed in the second catalytic filler layer 1202, so that the treatment efficiency of the tail gas is improved.
Further, the thickness of the first catalytic filler layer 1201 is greater than that of the second catalytic filler layer 1202, so that the treatment effect of the permanent violet tail gas is ensured, and the content of organic substances in the permanent violet production tail gas is reduced.
Furthermore, raschig rings are adopted as the support framework of the catalytic filler layer 120 to increase the contact reaction area, so that the oxidative decomposition efficiency of the permanent violet production tail gas is improved, and the content of organic substances in the permanent violet production tail gas is reduced.
In an embodiment, the purified tail gas discharge pipe 130 is provided with a purified gas demister 131 to reduce the water content in the discharged tail gas.
In an embodiment, the tail end of the exhaust pipe 130 for purifying the tail gas is connected with an induced draft fan 132 to provide a micro negative pressure, reduce the pressure at the top of the catalytic oxidation spraying neutralization tower, and improve the treatment efficiency of the permanent violet production tail gas.
Further, the outlet of the induced draft fan 132 is connected with a tail gas deep purification device 500 to further carry out deep treatment on the discharged permanent violet production tail gas.
In one embodiment, the spray distributor 430 is a tube distributor.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (9)
1. A catalytic oxidation neutralization apparatus for treating permanent violet apparatus for producing high concentration waste gas, characterized by comprising:
the catalytic oxidation spraying neutralization tower is characterized in that a liquid alkali storage tank is arranged at the bottom of the catalytic oxidation spraying neutralization tower, neutralized alkali liquor is filled in the liquid alkali storage tank, a catalytic packing layer is arranged in the middle of the catalytic oxidation spraying neutralization tower, and a purified tail gas discharge pipe is arranged at the upper part of the catalytic oxidation spraying neutralization tower;
the permanent violet production tail gas inlet pipe is connected with the catalytic oxidation spraying neutralization tower, and an inlet is positioned below the catalytic packing layer;
the outlet end of the ozone generating assembly is communicated with the bottom of the liquid caustic soda storage tank; and
the circulating spray assembly comprises a circulating spray pump, a circulating spray pipe and a spray distributor, the inlet of the circulating spray pump is communicated with the liquid caustic soda storage tank, the circulating spray pipe is connected with the outlet of the circulating spray pump, the spray distributor is arranged above the catalytic packing layer, and the feeding end of the spray distributor is connected with the circulating spray pipe.
2. The catalytic oxidation neutralization apparatus for treating high-concentration exhaust gas of a permanent violet production apparatus according to claim 1, wherein the catalytic filler layer comprises a plurality of catalytic filler layers arranged in sequence from top to bottom, a spraying interval is provided between two adjacent catalytic filler layers, and the spraying distributor is arranged in the spraying interval.
3. The catalytic oxidation neutralization apparatus for treating high-concentration exhaust gas of a permanent violet production apparatus according to claim 2, wherein the catalytic filler layer comprises a first catalytic filler layer and a second catalytic filler layer arranged from bottom to top, and the first catalytic filler layer and the second catalytic filler layer are provided with the spraying space therebetween;
the spraying distributor comprises a first spraying distributor and a second spraying distributor, the first spraying distributor is arranged above the first catalytic filler layer, and the second spraying distributor is arranged above the second catalytic filler layer.
4. The catalytic oxidation neutralization apparatus for treating high-concentration exhaust gas from a permanent violet production plant of claim 3, wherein the first catalytic filler layer has a thickness greater than the thickness of the second catalytic filler layer.
5. The catalytic oxidation neutralization apparatus for treating high-concentration exhaust gas of a permanent violet production apparatus according to claim 1, wherein the supporting framework of the catalytic packing layer adopts Raschig rings.
6. The catalytic oxidation neutralization apparatus for treating high concentration exhaust gas of a permanent violet production apparatus according to claim 1, wherein a purified gas demister is provided on the purified tail gas exhaust pipe.
7. The catalytic oxidation neutralization apparatus for treating high concentration exhaust gas of permanent violet production apparatus according to claim 1, wherein the tail end of the exhaust gas purification pipe is connected with an induced draft fan.
8. The catalytic oxidation neutralization apparatus for treating permanent violet apparatus for producing high concentration waste gas of claim 7, wherein the outlet of the induced draft fan is connected with a tail gas deep purification device.
9. The catalytic oxidation neutralization apparatus for treating high-concentration exhaust gas of a permanent violet production plant according to claim 1, wherein the spray distributor is a tubular distributor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021829835.5U CN213193174U (en) | 2020-08-27 | 2020-08-27 | Catalytic oxidation neutralization device for treating high-concentration waste gas of permanent violet production device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021829835.5U CN213193174U (en) | 2020-08-27 | 2020-08-27 | Catalytic oxidation neutralization device for treating high-concentration waste gas of permanent violet production device |
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| CN213193174U true CN213193174U (en) | 2021-05-14 |
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| CN202021829835.5U Active CN213193174U (en) | 2020-08-27 | 2020-08-27 | Catalytic oxidation neutralization device for treating high-concentration waste gas of permanent violet production device |
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