CN213943083U - Air preheater for phthalic anhydride production - Google Patents
Air preheater for phthalic anhydride production Download PDFInfo
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- CN213943083U CN213943083U CN202022616959.1U CN202022616959U CN213943083U CN 213943083 U CN213943083 U CN 213943083U CN 202022616959 U CN202022616959 U CN 202022616959U CN 213943083 U CN213943083 U CN 213943083U
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- holding portion
- heating element
- heating
- phthalic anhydride
- fin
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Abstract
The utility model discloses an air heater is used in phthalic anhydride production, including a jar body, first heating element and second heating element, the jar body is formed by connecting gradually first holding portion, connecting portion and second holding portion from the top down, the internal diameter of first holding portion is less than the internal diameter of second holding portion, the air inlet has been seted up on the top of the jar body, and the gas outlet has been seted up to the bottom, first heating element sets up at first holding portion, second heating element sets up at the second holding portion, first heating element includes the first heating pipe that the level set up, the second heating pipe of feed liquor coil pipe, play liquid coil pipe and vertical intercommunication between the two is included to the second component. The preheating device can greatly reduce the height of the heating pipe while ensuring the preheating effect, reduce the waste of pipes, reduce the conveying power of a heat medium and greatly reduce the comprehensive cost.
Description
Technical Field
The utility model relates to a chemical production field especially relates to an air heater is used in phthalic anhydride production.
Background
In the production process of phthalic anhydride, the intervention of oxidizing air is needed, and the oxidizing air needs to be preheated to refer to normal reaction. Among the prior art, the oxidizing air is generally heated by the heating pipe of vertical setting, because oxidizing air velocity is very fast, in order to satisfy the condition of preheating, the height of heating pipe often needs very high, extravagant a large amount of tubular products, and needs higher delivery power when the hot medium is carried, and the comprehensive cost is higher.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of prior art, the utility model aims to provide an air heater is used in phthalic anhydride production, but its height of greatly reduced heating pipe when guaranteeing to preheat the effect reduces the waste of tubular product, reduces heat medium's power of delivery, reduces comprehensive cost by a wide margin.
In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:
the utility model provides an air heater is used in phthalic anhydride production, includes a jar body, first heating element and second heating element, jar body is formed by connecting gradually first holding portion, connecting portion and second holding portion from the top down, the internal diameter of first holding portion is less than the internal diameter of second holding portion, the air inlet has been seted up on the top of jar body, and the gas outlet has been seted up to the bottom, first heating element sets up in first holding portion, second heating element sets up in the second holding portion, first heating element includes the first heating pipe that the level set up, second heating element includes the feed liquor coil pipe, goes out liquid coil pipe and vertical intercommunication second heating pipe between the two.
Preferably, the first heating assembly further comprises a first fin connected to the first heating pipe.
Preferably, the cross section of the first heating pipe is elliptical.
Preferably, the first fin is provided with a first U-shaped lug, and an opening of the first U-shaped lug is perpendicular to the first heating pipe.
Preferably, the second heating assembly further comprises a second fin connected to the second heating pipe.
Preferably, the second heating pipe has a circular cross section.
Preferably, a second U-shaped lug is arranged on the second fin, and an opening of the second U-shaped lug is parallel to the second heating pipe.
Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model discloses in, oxidizing air gets into behind the pre-heater through the air inlet, at first preheat in first heating element department, oxidizing air after the heating gets into the second holding portion through connecting portion, because the internal diameter of first holding portion is less than the internal diameter of second holding portion, velocity of flow greatly reduced when oxidizing air gets into the second holding portion, in addition preheating of first heating element, can realize preheating of oxidizing air through very short second heating element stroke, greatly reduced the height of second heating pipe, reduce the waste of tubular product, can reduce the heat medium simultaneously and follow the power of upwards carrying down in the second heating pipe, reduce comprehensive cost by a wide margin.
Drawings
FIG. 1 is a schematic structural view of an air preheater for phthalic anhydride production in a preferred embodiment of the present invention;
FIG. 2 is a schematic structural view of a first heating tube and a first fin of the first heating assembly of FIG. 1;
FIG. 3 is a schematic structural view of a second heating tube and a second fin of the second heating assembly of FIG. 1;
wherein 11 is a first accommodating portion, 12 is a connecting portion, 13 is a second accommodating portion, 14 is an air inlet, 15 is an air outlet, 2 is a first heating assembly, 21 is a first heating pipe, 22 is a first fin, 221 is a first U-shaped lug, 31 is a liquid inlet coil, 32 is a liquid outlet coil, 33 is a second heating pipe, 34 is a second fin, and 341 is a second U-shaped lug.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, for the utility model discloses an air heater is used in phthalic anhydride production in the preferred embodiment, including a jar body, first heating element 2 and second heating element, the jar body is formed by connecting gradually first holding portion 11, connecting portion 12 and second holding portion 13 from the top down, and the internal diameter of first holding portion 11 is less than the internal diameter of second holding portion 13, air inlet 14 has been seted up on the top of the jar body, and gas outlet 15 has been seted up to the bottom, and first heating element 2 sets up in first holding portion 11, the second heating element sets up in second holding portion 13, and first heating element 2 includes the first heating pipe 21 of level setting, and second heating element includes feed liquor coil 31, goes out liquid coil 32 and vertical intercommunication second heating pipe 33 between the two. The utility model discloses in, after oxidation air got into the pre-heater through the air inlet, at first preheat in 2 departments of first heating element, oxidation air after the heating gets into second holding portion 13 through connecting portion 12, because the internal diameter of first holding portion 11 is less than the internal diameter of second holding portion 13, velocity of flow greatly reduced when oxidation air gets into second holding portion 13, in addition preheating of first heating element, can realize preheating of oxidation air through very short second heating element stroke, greatly reduced second heating pipe 33's height, reduce the waste of tubular product, can reduce the power that the hot-medium upwards carried down in second heating pipe 33 simultaneously, reduce comprehensive cost by a wide margin.
Specifically, referring to fig. 2, the first heating element 2 further includes a first fin 22 connected to the first heating pipe 21, so that the contact area during heat exchange can be further enlarged, and the heat exchange rate can be improved.
Specifically, the cross section of the first heating pipe 21 is elliptical, which effectively reduces the obstruction of the oxidizing air when flowing through.
Specifically, in order to further increase the contact heat exchange area, the first fin 22 is provided with a first U-shaped protruding piece 221, and the opening of the first U-shaped protruding piece 221 is perpendicular to the first heating pipe 21.
Referring to fig. 3, the second heating assembly further includes a second fin 34 connected to the second heating pipe 33, so that a contact area during heat exchange can be further enlarged, and a heat exchange rate can be improved. The second heating pipe 33 has a circular cross-section.
Specifically, in order to further increase the contact heat exchange area, the second fin 34 is provided with a second U-shaped fin 341, an opening of the second U-shaped fin 341 is parallel to the second heating pipe 34, and the oxidizing air can pass through the opening of the second U-shaped fin 341, so that a certain turbulence can be performed on the oxidizing air, and the mixing of the oxidizing air at the second heating assembly is facilitated.
Specifically, in order to further reduce the flow velocity of the oxidizing air in the tank body, the diameter of the air inlet 14 is smaller than that of the air outlet 15, and the air inlet 14 and the air outlet 15 are both provided with conical structures, so that the oxidizing air is convenient to diffuse and collect.
The utility model discloses in, after oxidation air got into the pre-heater through the air inlet, at first preheat in 2 departments of first heating element, oxidation air after the heating gets into second holding portion 13 through connecting portion 12, because the internal diameter of first holding portion 11 is less than the internal diameter of second holding portion 13, velocity of flow greatly reduced when oxidation air gets into second holding portion 13, in addition preheating of first heating element, can realize preheating of oxidation air through very short second heating element stroke, greatly reduced second heating pipe 33's height, reduce the waste of tubular product, can reduce the power that the hot-medium upwards carried down in second heating pipe 33 simultaneously, reduce comprehensive cost by a wide margin.
Various other modifications and changes may be made by those skilled in the art based on the above technical solutions and concepts, for example, the dimensions may be changed to make the charging device suitable for charging a tablet computer, and all such modifications and changes should fall within the scope of the present invention.
Claims (7)
1. The utility model provides an air heater for phthalic anhydride production, its characterized in that, includes a jar body, first heating element and second heating element, the jar body is formed by first holding portion, connecting portion and second holding portion from the top down connecting gradually, the internal diameter of first holding portion is less than the internal diameter of second holding portion, the air inlet has been seted up on the top of jar body, and the gas outlet has been seted up to the bottom, first heating element sets up at first holding portion, second heating element sets up at the second holding portion, first heating element includes the first heating pipe of level setting, second heating element includes the second heating pipe of feed liquor coil pipe, play liquid coil pipe and vertical intercommunication between the two.
2. The phthalic anhydride producing air preheater of claim 1, wherein the first heating element further comprises a first fin attached to the first heating tube.
3. The phthalic anhydride production air preheater of claim 2, wherein the first heating tube has an elliptical cross-section.
4. The phthalic anhydride production air preheater of claim 2, wherein the first fin is provided with a first U-shaped fin, and an opening of the first U-shaped fin is perpendicular to the first heating tube.
5. The phthalic anhydride producing air preheater of claim 1, wherein the second heating element further comprises a second fin attached to the second heating tube.
6. The phthalic anhydride production air preheater of claim 5, wherein the second heating pipe has a circular cross-section.
7. The phthalic anhydride production air preheater of claim 5, wherein the second fin is provided with a second U-shaped lug, and the opening of the second U-shaped lug is parallel to the second heating tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022616959.1U CN213943083U (en) | 2020-11-12 | 2020-11-12 | Air preheater for phthalic anhydride production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022616959.1U CN213943083U (en) | 2020-11-12 | 2020-11-12 | Air preheater for phthalic anhydride production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213943083U true CN213943083U (en) | 2021-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022616959.1U Active CN213943083U (en) | 2020-11-12 | 2020-11-12 | Air preheater for phthalic anhydride production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213943083U (en) |
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2020
- 2020-11-12 CN CN202022616959.1U patent/CN213943083U/en active Active
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