CN209876957U - Small-sized integrated volatile organic compound catalytic oxidation burner - Google Patents
Small-sized integrated volatile organic compound catalytic oxidation burner Download PDFInfo
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- CN209876957U CN209876957U CN201920722195.9U CN201920722195U CN209876957U CN 209876957 U CN209876957 U CN 209876957U CN 201920722195 U CN201920722195 U CN 201920722195U CN 209876957 U CN209876957 U CN 209876957U
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Abstract
The utility model relates to a catalytic combustion reactor technical field, concretely relates to small-size integrated volatile organic compounds catalytic oxidation combustor, including the casing, the surface of casing is equipped with the insulating layer, and the casing bottom is the air inlet that is equipped with VOCs waste gas, and the air inlet top is catalytic heat transfer district, and the central part in catalytic heat transfer district is catalytic reaction bed, and the catalytic reaction bed below is the catalytic reaction blast pipe, and the heat exchanger has been arranged around the catalytic reaction bed, and the heat exchanger utilizes the high temperature VOCs waste gas that has passed through catalytic heat transfer district catalytic reaction to heat the VOCs waste gas that the air inlet got into; a fresh air inlet is arranged above the catalytic heat exchange area and is communicated with the catalytic reaction bed; and a heater is also arranged above the catalytic heat exchange area, an electric heating pipe is arranged in the heater, a heating pipe sleeve is arranged outside the electric heating pipe, and the inside of the heating pipe sleeve is isolated from VOCs waste gas in the shell. The utility model discloses overall arrangement is compact, and heating, catalysis, heat transfer system three are integrated, and the reactor is small, and is efficient.
Description
Technical Field
The utility model relates to a catalytic combustion reactor technical field, concretely relates to small-size volatile organic compounds catalytic oxidation combustor that integrates.
Background
Along with economic development, the environmental pollution problem is increasingly severe, and the concentration of ozone in the atmosphere is increased due to photochemical reaction of Volatile Organic Compounds (VOCs) and nitrogen oxides under certain conditions; or reacts with free radicals in the atmosphere to form secondary aerosol pollution to O in the atmosphere3And the formation of air pollution such as dust haze plays a very important role, thereby indirectly affecting human health and drawing more and more attention.
At present, the terminal treatment technology of VOCs mainly has two ways, one is destruction and conversion, and the other is recovery. The destruction and conversion approach is to collect and convert complex VOCs into non-toxic, harmless and inorganic small molecular compounds such as carbon dioxide and water by chemical or biochemical reaction with heat, light, catalyst or microorganism, and mainly comprises combustion method, biotechnology, photocatalytic oxidation, plasma technology, etc. The recovery method is to enrich and separate the VOCs by changing the temperature and the pressure or adopting physical methods such as selective adsorbents and selective permeable membranes. Mainly comprises an adsorption technology, an absorption technology, a condensation technology, a membrane separation technology and the like. The catalytic combustion method has the characteristics of wide application range, high treatment efficiency on waste gas and thorough treatment (generally over 90 percent), and has better application prospect in industry.
The catalytic combustion reactor is a device for realizing the catalytic combustion reaction process, and is slightly different according to different bed layers and distribution forms. In the catalytic combustion reactor, VOCs are flameless combusted at a lower ignition temperature by virtue of the action of a catalyst, so that organic waste gas is decomposed into nontoxic carbon dioxide and water vapor, and the carbon dioxide and the water vapor are removed.
The flow of the traditional catalytic combustion reactor is as follows: the method comprises the steps of air inlet, heat exchange, heating, catalytic combustion, heat exchange and exhaust, wherein the reaction is divided into a starting stage and an operating stage. During the starting stage, low-temperature VOCs waste gas is introduced into a heater to be heated until reaching the reaction temperature of the VOCs waste gas, and flameless combustion is carried out at a lower ignition temperature under the action of a catalyst bed layer to decompose the VOCs into CO2And H2And O, releasing heat, and entering an operation stage when the released heat is enough to maintain the normal operation of the system. In the operation stage, the low-temperature VOCs waste gas exchanges heat with high-temperature gas generated after catalytic combustion reaction in a heat exchanger, the temperature of the low-temperature VOCs waste gas after heat exchange rises, then the low-temperature VOCs waste gas enters the catalytic bed layer through a heater to react, the temperature of the VOCs waste gas entering the catalytic bed layer meets the reaction requirement, the heater stops heating, and otherwise, the heater starts to operate when the reaction temperature is lower than a specified value. And the high-temperature gas after the reaction is discharged after heat exchange. The catalytic combustion reactor of this structure has the following technical problems:
1. the fresh air system of the existing catalytic combustion reactor is arranged before heat exchange and cannot be in direct contact with a catalyst bed layer, and when the temperature of a catalytic reaction bed is too high, the cooling rate is slow, so that the temperature control of the reaction bed layer is not facilitated.
2. The heating, the catalyzing and the heat exchanging are three independent modules, and the occupied area is large.
3. The structure is looser, and the connecting pipe is too much, causes the heat to run off.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a small-size volatile organic compounds catalytic oxidation combustor that integrates solves the problem that catalytic reaction in-process reaction bed high temperature can't in time be cooled down to compact overall arrangement that integrates reduces the equipment volume, reduces too much connecting tube, improves heat utilization.
The specific technical scheme is as follows:
the small integrated catalytic oxidation burner for the volatile organic compounds comprises a shell, wherein a heat insulation layer is arranged on the surface of the shell, an air inlet provided with VOCs waste gas is arranged at the bottom of the shell, a catalytic heat exchange area is arranged above the air inlet, a catalytic reaction bed is arranged in the center of the catalytic heat exchange area, a catalytic reaction exhaust pipe is arranged below the catalytic reaction bed, a heat exchanger is arranged around the catalytic heat exchange area, and the heat exchanger heats the VOCs waste gas entering the air inlet by utilizing high-temperature VOCs waste gas after catalytic reaction in the catalytic heat exchange area; a fresh air inlet is arranged above the catalytic heat exchange area and is communicated with the catalytic reaction bed; a heater is also arranged above the catalytic heat exchange zone, an electric heating pipe is arranged in the heater, a heating pipe sleeve is arranged outside the electric heating pipe, and the interior of the heating pipe sleeve is isolated from VOCs waste gas in the shell; the top of the shell is provided with a manhole.
Furthermore, a refrigerant inlet of the heat exchanger is communicated with the air inlet, the refrigerant is unreacted VOCs waste gas, a heat medium inlet of the heat exchanger is communicated with the catalytic reaction exhaust pipe, and the heat medium is reacted high-temperature VOCs waste gas; a baffle plate is arranged in the heat medium cavity of the heat exchanger, and a heat medium air outlet of the heat exchanger is connected with the heat medium cavity of the heat exchanger and is positioned at the upper part of the catalytic heat exchange area;
and a baffle plate is arranged in a heat medium cavity of the heat exchanger.
The utility model discloses a structure has following characteristics:
1. protection layout form: the catalytic reactor has the advantages of integration of the heating system, the catalytic combustion system and the heat exchange system, compact layout, small volume, contribution to controlling the temperature of the catalytic reaction bed and improvement of heat utilization rate.
2. The catalytic reactor is protected, wherein the bottom of the catalytic reactor is provided with an air inlet, the upper part of the catalytic reactor is provided with a catalytic heat exchange zone, a catalytic reaction bed is positioned in the middle, VOCs waste gas enters from the upper part of the catalytic reaction bed, and high-temperature VOCs waste gas after reaction enters a heat exchanger from the lower part, and the heat exchanger can be in various forms such as a tube type, a plate type, a spiral plate type and the like; the heat exchanger is connected with the upper heater, and an electric heating pipe is arranged in the heater; a manhole is arranged in the center of the top of the catalytic reactor, and a fresh air inlet is arranged at the upper part of the catalytic reactor, so that the temperature of the catalytic reaction bed can be directly controlled.
The utility model provides a small-size integrated volatile organic compounds catalytic oxidation combustor, heat exchanger and catalytic reaction bed set up in the same region, the heat exchanger can be various forms such as tubular, board-like, spiral plate, the heat can be fully utilized, high-usage reduces the energy consumption; meanwhile, the fresh air can be directly mixed with VOCs waste gas to achieve the effect of timely reducing the temperature of the waste gas, and the control capability of the temperature of the reaction bed is improved. The whole layout is compact, the heating system, the catalyzing system and the heat exchange system are integrated, the reactor is small in size, and the efficiency is high.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic cross-sectional view I-I of FIG. 1;
FIG. 3 is a schematic cross-sectional view II-II of FIG. 1.
Detailed Description
The embodiments of the present invention will be described with reference to the following examples.
As shown in fig. 1, 2 and 3, the small-sized integrated catalytic oxidation burner for volatile organic compounds comprises a shell, wherein a heat insulation layer 11 is arranged on the surface of the shell, an air inlet 1 provided with VOCs waste gas is arranged at the bottom of the shell, a catalytic heat exchange area is arranged above the air inlet 1, a catalytic reaction bed 6 is arranged at the center of the catalytic heat exchange area, a catalytic reaction exhaust pipe 7 is arranged below the catalytic reaction bed 6, a heat exchanger 4 is arranged around the catalytic reaction bed, a refrigerant inlet of the heat exchanger 4 is communicated with the air inlet 1, the refrigerant is unreacted VOCs waste gas, a heat medium inlet of the heat exchanger 4 is communicated with the catalytic reaction exhaust pipe 7, and the heat medium is high-temperature VOCs waste gas after; a baffle plate 5 is arranged in a heat medium cavity of the heat exchanger 4, and a heat medium air outlet 8 of the heat exchanger 4 is connected with the heat medium cavity of the heat exchanger and is positioned at the upper part of the catalytic heat exchange area; the heat exchanger shown in the figure is a tube type, and can be in various forms such as a tube type, a plate type, a spiral plate type and the like.
A fresh air inlet 9 is arranged above the catalytic heat exchange area and is communicated with the catalytic reaction bed 6;
a heater is also arranged above the catalytic heat exchange area, an electric heating pipe 3 is arranged in the heater, a heating pipe sleeve 2 is arranged outside the electric heating pipe 3, and the interior of the heating pipe sleeve 2 is isolated from VOCs waste gas in the shell;
the top of the housing is provided with a manhole 10.
The small-sized integrated volatile organic compound catalytic oxidation burner has two stages of work: the specific working principle of the starting stage and the running stage is as follows:
1. and (5) a starting stage. VOCs waste gas lets in from air inlet 1, through catalytic heat exchanger, gets into the heater, heats through electric heating pipe 3, heats up to the assigned temperature (250 ~ 350 ℃) under electric heating pipe 3's heating effect, and VOCs waste gas gets into catalytic reaction bed 6, carries out catalytic combustion reaction, and waste gas is catalyzing at the catalysisThe agent can be used for flameless combustion to decompose VOCs into CO2And H2O and releases heat.
2. And (5) operating. And when the released heat is enough to maintain the normal operation of the system, entering an operation stage. In the operation stage, VOCs waste gas is introduced from the gas inlet 1, low-temperature VOCs waste gas exchanges heat with high-temperature gas generated after catalytic combustion reaction in the heat exchanger 4, the temperature of the low-temperature VOCs waste gas after heat exchange rises, and then the low-temperature VOCs waste gas enters the catalytic reaction bed 6 through the electric heating pipe 3 to react, the temperature of the VOCs waste gas entering the catalytic bed layer meets the requirement of reaction, the heater stops heating, and otherwise, when the reaction temperature is lower than a specified value, the heater starts to operate. The high-temperature gas after reaction is discharged from the catalytic reaction exhaust pipe 7 and enters the cavity of the heat exchanger, and the gas outlet 8 is communicated with the cavity of the heater and is discharged from the gas outlet after heat exchange. The upper part of the catalytic reactor is provided with a fresh air inlet 9, and fresh air can be directly mixed with VOCs waste gas to achieve the effect of reducing the temperature of the waste gas, so that the control capability of the temperature of a reaction bed layer is improved. The catalytic reactor outside is equipped with insulating layer 11, and is provided with manhole 10 directly over the top, conveniently overhauls.
Claims (4)
1. The small integrated catalytic oxidation burner for the volatile organic compounds comprises a shell, wherein a heat insulation layer (11) is arranged on the surface of the shell, and a gas inlet (1) provided with VOCs waste gas is arranged at the bottom of the shell, and is characterized in that a catalytic heat exchange region is arranged above the gas inlet (1), a catalytic reaction bed (6) is arranged at the central part of the catalytic heat exchange region, a catalytic reaction exhaust pipe (7) is arranged below the catalytic reaction bed (6), heat exchangers (4) are arranged around the catalytic reaction bed, and the heat exchangers (4) heat the VOCs waste gas entering the gas inlet (1) by utilizing the high-temperature VOCs waste gas which is subjected to catalytic reaction in the catalytic heat exchange region;
a fresh air inlet (9) is arranged above the catalytic heat exchange area and is communicated with the catalytic reaction bed (6);
a heater is also arranged above the catalytic heat exchange area, an electric heating pipe (3) is arranged in the heater, a heating pipe sleeve (2) is arranged outside the electric heating pipe (3), and the inside of the heating pipe sleeve (2) is isolated from VOCs waste gas in the shell;
the top of the shell is provided with a manhole (10).
2. The small-scale integrated VOC catalytic oxidation burner as claimed in claim 1, wherein the refrigerant inlet of the heat exchanger (4) is communicated with the gas inlet (1), the refrigerant is unreacted VOCs waste gas, the heat medium inlet of the heat exchanger (4) is communicated with the catalytic reaction exhaust pipe (7), and the heat medium is reacted high-temperature VOCs waste gas; a baffle plate (5) is arranged in a heat medium cavity of the heat exchanger (4), and a heat medium air outlet (8) of the heat exchanger (4) is connected with the heat medium cavity of the heat exchanger and is positioned at the upper part of the catalytic heat exchange area.
3. The small-scale integrated VOC catalytic oxidation burner as claimed in claim 2, characterized in that a baffle plate (5) is arranged in the heat medium cavity of the heat exchanger (4).
4. The compact integrated voc catalytic oxidation burner according to claim 1, wherein the heat exchanger (4) can be of tubular, plate or spiral type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920722195.9U CN209876957U (en) | 2019-05-20 | 2019-05-20 | Small-sized integrated volatile organic compound catalytic oxidation burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920722195.9U CN209876957U (en) | 2019-05-20 | 2019-05-20 | Small-sized integrated volatile organic compound catalytic oxidation burner |
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| CN209876957U true CN209876957U (en) | 2019-12-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043912A (en) * | 2019-05-20 | 2019-07-23 | 四川省生态环境科学研究院 | Small integrated volatile organic matter catalytic oxidation combustion device |
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- 2019-05-20 CN CN201920722195.9U patent/CN209876957U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043912A (en) * | 2019-05-20 | 2019-07-23 | 四川省生态环境科学研究院 | Small integrated volatile organic matter catalytic oxidation combustion device |
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