CN218672241U - Plate type heat exchange device for flue reducing section - Google Patents
Plate type heat exchange device for flue reducing section Download PDFInfo
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- CN218672241U CN218672241U CN202223069717.0U CN202223069717U CN218672241U CN 218672241 U CN218672241 U CN 218672241U CN 202223069717 U CN202223069717 U CN 202223069717U CN 218672241 U CN218672241 U CN 218672241U
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Abstract
The utility model relates to a plate type heat exchange device for a flue reducing section, which is arranged in a flue shell, wherein the flue shell is a reducing flue shell and comprises a first connecting part, a second connecting part and a plurality of heat exchange plates; the plurality of heat exchange plates are arranged at intervals and are matched with the flue shell; a heat exchange channel is arranged in the heat exchange plate; the first connecting part and the second connecting part are arranged on the outer side of the flue shell; one side of the first connecting part is connected with a plurality of air inlet branch pipes; the plurality of air inlet branch pipes are connected with the air inlet main pipe; one side of the second connecting part is connected with a plurality of air outlet branch pipes; and the plurality of air outlet branch pipes are connected with the air outlet main pipe. The utility model discloses listen to the reducing section of installing at the flue, reduced the position requirement of heat exchanger installation, reduced the investment cost of heat exchanger installation, through a plurality of heat transfer slab, not only have the effect of heat transfer and the water conservancy diversion effect in addition, improve flue gas homogeneity and stability.
Description
Technical Field
The utility model belongs to the technical field of plate heat exchanger, in particular to plate heat transfer device for flue reducing section.
Background
In recent years, along with the implementation of environment-friendly ultralow emission in China, the ultralow emission of flue gas is gradually improved in various non-electric industries. The most mature and common denitration technology route is a selective catalytic denitration technology, also called SCR denitration technology. In the engineering of an SCR system, an SCR denitration reactor, a rake type soot blowing system and other system devices need to be newly built. The rake type soot blowing system generally uses high-temperature and high-pressure steam for soot blowing in the power industry, and recommends using heated compressed air as a soot blowing medium in the industries such as cement and the like due to less steam gas production in a factory.
Compressed air heating mainly adopts two schemes of electric heating and flue gas heat exchange. The electric heater has large power consumption, and may have the problems of insufficient capacitance, large capacity expansion investment and the like. The flue gas heat transfer scheme then needs to install gas heater on the flue, and there is following problem in the mounted position selection:
(1) Install in the flue before the SCR reactor, can cause SCR entry flue gas temperature to reduce, reduced SCR denitration efficiency.
(2) The installation in the straight section of SCR reactor lower part can cause the whole height increase of SCR reactor, has increased investment construction cost.
(3) The device is arranged in a flue behind an SCR reactor, so that the local resistance of the flue is increased, and the heat exchanger is easy to cause dust deposition and blockage. The flue needs to be expanded and modified, and the cost is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a board-like heat transfer device for flue reducing section installs at SCR denitration reactor export reducing section, effectively sparingly arranges the space, has realized the effective heat transfer of compressed air and flue gas, still has flue gas water conservancy diversion effect.
In order to achieve the purpose, the technical scheme adopted by the utility model is a plate type heat exchange device for the reducing section of the flue, which is arranged in a flue shell, wherein the flue shell is a reducing flue shell and comprises a first connecting part, a second connecting part and a plurality of heat exchange plates;
the plurality of heat exchange plates are arranged at intervals and are matched with the flue shell; among the plurality of heat exchange plates, the heat exchange plates at the axis of the flue shell are parallel to the axis, and the heat exchange plates at two ends of the axis of the flue shell are obliquely and curved and face the axis of the flue shell; a heat exchange channel is formed in the heat exchange plate; the heat exchange channel is of a snake-shaped coil type;
the first connecting part and the second connecting part are arranged on the outer side of the flue shell; one side of the first connecting part and one side of the second connecting part, which are close to the flue shell, are respectively connected with a plurality of connecting pipes corresponding to the heat exchange plates; the plurality of connecting pipes are respectively inserted into the flue shell and communicated with the heat exchange channels of the corresponding heat exchange plates; one side of the first connecting part is connected with a plurality of air inlet branch pipes; the plurality of air inlet branch pipes are connected with an air inlet main pipe; one side of the second connecting part is connected with a plurality of air outlet branch pipes; the plurality of air outlet branch pipes are connected with the air outlet main pipe; the one end that is close to first connecting portion in the flue casing is the flue gas inlet, and the one end that is close to the second connecting portion of flue casing is the exhanst gas outlet.
Preferably, a plurality of reinforcing ribs are fixed on each heat exchange plate in parallel, and the direction of each reinforcing rib is the same as the direction of flue gas in the flue shell.
Preferably, the heat exchanger plate has a smooth surface.
Preferably, the heat exchange channel is a circular pressure-bearing channel.
Preferably, the heat exchange medium in the heat exchange channel is compressed air or softened water.
The utility model relates to a board-like heat transfer device for flue reducing section compares with prior art and has following advantage:
(1) The variable-diameter section is arranged on the flue, so that the position requirement for installing the heat exchanger is reduced, and the investment cost for installing the heat exchanger is reduced;
(2) The heat exchange plates have a flow guiding effect, so that the uniformity and the stability of the flue gas are improved;
(3) The design is simple, easy to use, and low in manufacturing cost.
Drawings
FIG. 1 is a schematic view of the forward structure of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is an enlarged view of the reinforcing ribs on the heat exchanger plate;
fig. 4 isbase:Sub>A schematic view of the structure in the direction of fig. 3A-base:Sub>A.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, a plate heat exchanger for a flue reducer section is installed in a flue housing 1, the flue housing 1 is a reducer flue housing, the direction of the flue housing 1 may be vertical, horizontal, or inclined, and includes a first connecting portion 2, a second connecting portion 3, and a plurality of heat exchanger plates 4;
the plurality of heat exchange plates 4 are arranged at intervals and are matched with the flue shell 1, and the width of each heat exchange plate 4 is increased or reduced along with the change of the inner diameter of the flue shell 1, so that the distance between the two sides of each heat exchange plate 4 in the width direction and the flue shell 1 is always kept consistent; among the plurality of heat exchange plates 4, the heat exchange plates 4 at the axis of the flue shell 1 are parallel to the axis, the heat exchange plates 4 at the two ends of the axis of the flue shell 1 are obliquely and bent and are arranged towards the axis of the flue shell 1, flue gas circulates among the plurality of heat exchange plates 4, and the heat exchange plates 4 exchange heat with the flue gas and also play a role in guiding the flue gas; a heat exchange channel 41 is formed in the heat exchange plate 4; the heat exchange channel 41 is of a snake-shaped coil type, so that the contact area between a heat exchange medium and the heat exchange plate 4 is increased;
the first connecting part 2 and the second connecting part 3 are both arranged on the outer side of the flue shell 1; the first connecting part 2 and the second connecting part 3 are respectively connected with a plurality of connecting pipes 5 corresponding to the heat exchange plates 4 at one side close to the flue shell 1; a plurality of connecting pipes 5 are respectively inserted into the flue shell 1 and communicated with the heat exchange channels 41 of the corresponding heat exchange plates 4; one side of the first connecting part 2 is connected with a plurality of air inlet branch pipes 21; a plurality of the intake branch pipes 21 are connected to an intake main pipe 22; one side of the second connecting part 3 is connected with a plurality of air outlet branch pipes 31; the plurality of air outlet branch pipes 31 are connected with the air outlet main pipe 32, and compressed air is introduced into the air inlet main pipe 22 and enters the heat exchange channels 41 of the heat exchange plates 4 to exchange heat for the flue gas; a flue gas inlet 11 is formed in one end, close to the first connecting part 2, in the flue shell 1, and a flue gas outlet 12 is formed in one end, close to the second connecting part 3, of the flue shell 1;
in this embodiment, as shown in fig. 3 to 4, a plurality of reinforcing ribs 42 are fixed in parallel on each heat exchange plate 4, and the direction of the reinforcing ribs 42 is the same as the direction of the flue gas in the flue housing 1, so that the heat exchange efficiency is improved, and the flue gas guiding function is provided.
In this embodiment, the heat exchange plate 4 has a smooth surface and is not easy to deposit dust in flue gas.
In this embodiment, the heat exchange channel 41 is a circular pressure-bearing channel, so that the pressure-bearing capacity of the heat exchange plate 4 is improved.
In this embodiment, the heat exchange medium in the heat exchange channel 41 is compressed air or softened water, and heat exchange is performed on the high-temperature flue gas through the softened water, so that waste heat recovery of the high-temperature flue gas is realized.
The utility model discloses application method: let in the flue gas in the flue casing 1, the flue gas circulates between from a plurality of heat transfer slab 4, let in compressed air in the main pipe 22 of admitting air, compressed air is from the main pipe 22 of admitting air behind the pipe that gets into a plurality of admission, get into in the first connecting portion 2, in the heat transfer passageway 41 that gets into a plurality of heat transfer slab 4 through connecting pipe 5 from first connecting portion 2, compressed air passes through the heat transfer of heat transfer slab 4 and heaies up, follow second connecting portion 3 in proper order through connecting pipe 5, the branch pipe 31 of giving vent to anger is responsible for 32 to giving vent to anger, from giving vent to anger to be responsible for 32 and discharge.
Claims (5)
1. A plate type heat exchange device for a flue reducing section is characterized by being installed in a flue shell (1), wherein the flue shell (1) is a reducing flue shell and comprises a first connecting part (2), a second connecting part (3) and a plurality of heat exchange plates (4);
the heat exchange plates (4) are arranged at intervals and are matched with the flue shell (1); among the plurality of heat exchange plates (4), the heat exchange plates (4) at the axis of the flue shell (1) are parallel to the axis, and the heat exchange plates (4) at two ends of the axis of the flue shell (1) are obliquely and flexibly arranged and face the axis of the flue shell (1); a heat exchange channel (41) is arranged in the heat exchange plate (4); the heat exchange channel (41) is of a serpentine coil type;
the first connecting part (2) and the second connecting part (3) are arranged on the outer side of the flue shell (1); one sides of the first connecting part (2) and the second connecting part (3) close to the flue shell (1) are respectively connected with a plurality of connecting pipes (5) corresponding to the heat exchange plates (4); the connecting pipes (5) are respectively inserted into the flue shell (1) and communicated with the heat exchange channels (41) of the corresponding heat exchange plates (4); one side of the first connecting part (2) is connected with a plurality of air inlet branch pipes (21); the plurality of air inlet branch pipes (21) are connected with an air inlet main pipe (22); one side of the second connecting part (3) is connected with a plurality of air outlet branch pipes (31); the plurality of air outlet branch pipes (31) are connected with an air outlet main pipe (32); one end of the flue shell (1) close to the first connecting portion (2) is a flue gas inlet (11), and one end of the flue shell (1) close to the second connecting portion (3) is a flue gas outlet (12).
2. A plate heat exchanger for a flue reducer according to claim 1, wherein each heat exchanger plate (4) is fixed with a plurality of reinforcing ribs (42) in parallel, and the direction of the reinforcing ribs is the same as the direction of flue gas in the flue housing (1).
3. A plate heat exchanger for a flue reducer section according to claim 1, characterized in that the heat exchanger plates (4) have smooth surfaces.
4. The plate heat exchange device for a flue reducer section according to claim 1, wherein the heat exchange channel (41) is a circular pressure-bearing channel.
5. The plate heat exchange device for a flue reducer section according to claim 1 or 4, characterized in that the heat exchange medium in the heat exchange channel (41) is compressed air or softened water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223069717.0U CN218672241U (en) | 2022-11-19 | 2022-11-19 | Plate type heat exchange device for flue reducing section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223069717.0U CN218672241U (en) | 2022-11-19 | 2022-11-19 | Plate type heat exchange device for flue reducing section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218672241U true CN218672241U (en) | 2023-03-21 |
Family
ID=85538105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223069717.0U Active CN218672241U (en) | 2022-11-19 | 2022-11-19 | Plate type heat exchange device for flue reducing section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218672241U (en) |
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2022
- 2022-11-19 CN CN202223069717.0U patent/CN218672241U/en active Active
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