CN210410250U - Flue gas mixing device - Google Patents
Flue gas mixing device Download PDFInfo
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- CN210410250U CN210410250U CN201921115854.9U CN201921115854U CN210410250U CN 210410250 U CN210410250 U CN 210410250U CN 201921115854 U CN201921115854 U CN 201921115854U CN 210410250 U CN210410250 U CN 210410250U
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- flue gas
- temperature flue
- mixing device
- gas mixing
- pipeline
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Abstract
The utility model discloses a flue gas mixing device, which comprises a low-temperature flue gas pipeline (1) and a high-temperature flue gas conveying pipeline (2) which are connected with each other; high temperature flue gas pipeline (2) link to each other with high temperature flue gas pipeline branch (4) one end, and high temperature flue gas pipeline branch (4) other end inserts in low temperature flue gas pipeline (1) to link to each other with flue gas mixing arrangement center tube (5), flue gas mixing arrangement center tube (5) link to each other with flue gas mixing arrangement branch pipe (6), evenly seted up flue gas spout (7) on flue gas mixing arrangement branch pipe (6). The flue gas mixing device has reasonable structural design and good safety, can ensure low heat loss of flue gas and reduce the use amount of fuel; can guarantee that high temperature flue gas and low temperature flue gas mix evenly in the shortest mixing distance, the flue gas temperature is uneven can not appear, and the local overtemperature, the not up to standard condition of local temperature.
Description
Technical Field
The utility model relates to a flue gas firing equipment technical field among chemical industry, the metallurgical technology especially relates to a flue gas mixing arrangement.
Background
At present, in a common flue gas mixing device in the market, high-temperature flue gas is seriously radiated and the total heat quantity is obviously reduced on the way of conveying the high-temperature flue gas into a low-temperature flue gas pipeline. In order to satisfy the total intake heat of the low-temperature flue gas, the gas quantity of the front-end heating furnace burner is generally increased, and the operation cost is increased.
The mixing effect of high temperature flue gas and low temperature flue gas can't be guaranteed to common flue gas mixing arrangement, and local overtemperature's phenomenon can appear usually in the flue gas after mixing, behind the reaction temperature that mixed flue gas temperature surpassed the rear end process equipment requirement, can lead to the unable normal work of equipment.
Heating furnace and combustor device can be disposed to common flue gas mixing arrangement front end, because the terminal draught fan pressure head of whole process system is higher, can lead to in the heating furnace negative pressure very high under the circumstances of flue gas mixing arrangement resistance undersize, and it is great to the flame influence of combustor, the easy phenomenon of taking off a fire that appears.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a flue gas mixing arrangement to solve current heat loss serious, the local overtemperature of flue gas, catalyst inefficacy, heating furnace combustor and take off fire scheduling problem.
In order to achieve the above object, the system of the present invention adopts the following technical solutions:
a flue gas mixing device comprises a low-temperature flue gas pipeline and a high-temperature flue gas conveying pipeline which are connected with each other; the high-temperature flue gas conveying pipeline is connected with one end of a high-temperature flue gas conveying branch pipe, the other end of the high-temperature flue gas conveying branch pipe is inserted into the low-temperature flue gas pipeline and is connected with a central pipe of a flue gas mixing device, the central pipe of the flue gas mixing device is connected with a branch pipe of the flue gas mixing device, and flue gas nozzles are uniformly arranged on the branch pipe of the flue gas mixing device;
the central pipe of the flue gas mixing device is connected with the branch pipes of the flue gas mixing device which are distributed in a cross shape;
and the inner wall of the high-temperature flue gas conveying branch pipe is provided with an inner heat-insulating layer of the high-temperature flue gas conveying pipeline. The additional arrangement of the inner heat-insulating layer can ensure the normal transportation of high-temperature flue gas at the temperature of about 1000 ℃, and ensure that the temperature of the outer wall of the high-temperature flue gas transportation pipeline is less than or equal to 70 ℃.
As a preferred scheme, above a flue gas mixing arrangement, high temperature flue gas conveying pipe from bottom to top every section of conveying pipe all design for the undergauge structure, this kind of structure can guarantee that the high temperature flue gas of each branch pipe is as even as possible.
In the above flue gas mixing device, each section of the reducing-structured conveying pipeline in the high-temperature flue gas conveying pipeline is connected with one high-temperature flue gas conveying branch pipe.
As a preferred scheme, in the above flue gas mixing device, the low-temperature flue gas pipeline is of a relatively flat rectangular structure.
As preferred scheme, above a flue gas mixing arrangement, be equipped with the flue gas spout of different angles on the flue gas mixing arrangement branch pipe, the flue gas can be with the direction blowout of different angles, guarantees the mixed effect of flue gas once more, prevents the local overtemperature prote phenomenon.
The diameter of the flue gas nozzle on the branch pipe of the flue gas mixing device can be designed according to the pressure of the hearth, the flow of high-temperature flue gas and the size of a low-temperature flue gas pipeline, so that the reasonable resistance drop of the flue gas mixing device is ensured, and the stable combustion of fuel gas in the hearth of the front-end heating furnace is ensured.
High-temperature flue gas of about 1000 ℃ in the high-temperature flue gas conveying pipeline is conveyed to a central pipe of a flue gas mixing device, then conveyed to branch pipes of the flue gas mixing device in a cross distribution mode, and then is uniformly sprayed into the low-temperature flue gas pipeline through a flue gas nozzle to be uniformly mixed with the low-temperature flue gas.
Has the advantages that: compare with conventional flue gas mixing arrangement, the utility model has the advantages of:
the utility model has the advantages of reasonable design, safety and stability is high, can guarantee that high temperature flue gas and low temperature flue gas mix evenly in shortest mixing distance, guarantees that flue gas mixing arrangement self reasonable resistance drops, guarantees the stable burning of fuel gas in the front end heating furnace.
Drawings
Fig. 1 is a schematic structural diagram of a flue gas mixing device provided by the present invention.
Detailed Description
The following further description is made in conjunction with the accompanying drawings and examples.
As shown in fig. 1, a flue gas mixing device comprises a low-temperature flue gas pipeline 1 and a high-temperature flue gas conveying pipeline 2 which are connected with each other; the high-temperature flue gas conveying pipeline 2 is connected with one end of a high-temperature flue gas conveying branch pipe 4, the other end of the high-temperature flue gas conveying branch pipe 4 is inserted into the low-temperature flue gas pipeline 1 and is connected with a flue gas mixing device central pipe 5, the flue gas mixing device central pipe 5 is connected with a flue gas mixing device branch pipe 6, and flue gas nozzles 7 are uniformly formed in the flue gas mixing device branch pipe 6;
the central pipe 5 of the flue gas mixing device is connected with the branch pipes 6 of the flue gas mixing device which are distributed in a cross shape;
and the inner wall of the high-temperature flue gas conveying branch pipe 4 is provided with an inner heat-insulating layer 3 of the high-temperature flue gas conveying pipeline.
The flue gas mixing device is characterized in that each section of the conveying pipeline from bottom to top of the high-temperature flue gas conveying pipeline 2 is designed into a reducing structure. Each section of the reducing structure conveying pipeline in the high-temperature flue gas conveying pipeline 2 is connected with a high-temperature flue gas conveying branch pipe 4.
The low-temperature flue gas pipeline 1 is of a relatively flat rectangular structure.
The flue gas mixing device provided by the utility model can ensure low loss of flue gas heat and reduce the fuel consumption; the high-temperature flue gas and the low-temperature flue gas can be uniformly mixed in the shortest mixing distance, and the conditions of uneven flue gas temperature, local overtemperature and local temperature not reaching the standard can be avoided; in addition, the flue gas mixing device can design different resistance drops according to the process requirements, and the influence on combustion equipment in the front-end incinerator is avoided under the condition of high negative pressure of a low-temperature flue.
The above is only the embodiment of the flue gas mixing device of the present invention, and does not limit the present novel protection scope. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (4)
1. The utility model provides a flue gas mixing arrangement which characterized in that: the device comprises a low-temperature flue gas pipeline (1) and a high-temperature flue gas conveying pipeline (2) which are connected with each other; the high-temperature flue gas conveying pipeline (2) is connected with one end of a high-temperature flue gas conveying branch pipe (4), the other end of the high-temperature flue gas conveying branch pipe (4) is inserted into the low-temperature flue gas pipeline (1) and is connected with a flue gas mixing device central pipe (5), the flue gas mixing device central pipe (5) is connected with a flue gas mixing device branch pipe (6), and flue gas nozzles (7) are uniformly formed in the flue gas mixing device branch pipe (6);
the central pipe (5) of the flue gas mixing device is connected with the branch pipes (6) of the flue gas mixing device which are distributed in a cross shape;
and the inner wall of the high-temperature flue gas conveying branch pipe (4) is provided with an inner heat-insulating layer (3) of the high-temperature flue gas conveying pipeline.
2. The flue gas mixing device of claim 1, wherein: each section of the high-temperature flue gas conveying pipeline (2) from bottom to top is designed into a reducing structure.
3. A flue gas mixing device according to claim 2, characterized in that: each section of the reducing structure conveying pipeline in the high-temperature flue gas conveying pipeline (2) is connected with a high-temperature flue gas conveying branch pipe (4).
4. A flue gas mixing device according to any one of claims 1 to 3, characterized in that: the low-temperature flue gas pipeline (1) is of a relatively flat rectangular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921115854.9U CN210410250U (en) | 2019-07-16 | 2019-07-16 | Flue gas mixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921115854.9U CN210410250U (en) | 2019-07-16 | 2019-07-16 | Flue gas mixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210410250U true CN210410250U (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921115854.9U Active CN210410250U (en) | 2019-07-16 | 2019-07-16 | Flue gas mixing device |
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| CN (1) | CN210410250U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114682059A (en) * | 2020-12-30 | 2022-07-01 | 中国石油化工股份有限公司 | Branch type white smoke eliminating equipment and white smoke eliminating method |
-
2019
- 2019-07-16 CN CN201921115854.9U patent/CN210410250U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114682059A (en) * | 2020-12-30 | 2022-07-01 | 中国石油化工股份有限公司 | Branch type white smoke eliminating equipment and white smoke eliminating method |
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