CN212157221U - Boiler tail flue improving device - Google Patents
Boiler tail flue improving device Download PDFInfo
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- CN212157221U CN212157221U CN202020540616.9U CN202020540616U CN212157221U CN 212157221 U CN212157221 U CN 212157221U CN 202020540616 U CN202020540616 U CN 202020540616U CN 212157221 U CN212157221 U CN 212157221U
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- arc
- guide plate
- economizer
- boiler
- flue
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Abstract
The utility model discloses a boiler tail flue improving device, which comprises a higher-level economizer, wherein an arc-shaped guide plate is arranged right above the outlet of the higher-level economizer and used for flue gas diversion, and the lower part of the arc-shaped guide plate is connected with a supporting device above a lower-level economizer; the utility model has the advantages that: the boiler flue gas can be uniformly distributed with a certain smoke velocity to flow through the economizer, so that the flue gas at each section can be uniformly recycled, the smoke exhaust temperature is reduced, the pipe row of the economizer is completely prevented from being scoured and worn, the accident shutdown frequency is reduced, and the heat efficiency of the boiler is improved.
Description
Technical Field
The utility model relates to a boiler afterbody flue improves flue gas diverging device, and specifically speaking is a boiler afterbody flue improves device belongs to boiler afterbody flue and improves flue gas diverging field.
Background
The flue gas guide plate at the inlet of the lower-level economizer of the boiler has the advantages that the design deviation causes uneven flue gas flow velocity, the lower-level economizer is seriously washed, the boiler is forced to be shut down due to pipe explosion at last, and the boiler cannot keep long-term stable operation.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model discloses a boiler afterbody flue improves device can effectively distribute the flow field, and even distribution carries out abundant heat transfer to subordinate's economizer, has reduced the wearing and tearing of economizer bank of tubes, has improved flue gas waste heat utilization ability, reaches comprehensive energy-conserving effect.
The technical scheme of the utility model is that:
the boiler tail flue improving device comprises a higher-level economizer, wherein an arc-shaped guide plate is arranged right above an outlet of the higher-level economizer and used for shunting flue gas, and the lower part of the arc-shaped guide plate is connected with a supporting device above a lower-level economizer.
The arc-shaped guide plate is arranged on the supporting device.
The arc guide plates are a plurality of arc plates which are arranged in the flue side by side and used for changing the direction of flue gas.
In addition, strutting arrangement is to be made the bracing with 8 mm's stainless steel reinforcing bar and cut off the welding and form below the arc guide plate, and its effect is for supporting the guide plate and strengthening guide plate intensity.
The utility model discloses connect directly over the economizer export, arc guide plate below and between the economizer of subordinate.
The narrow aerodynamic field and the temperature field in the furnace are analyzed through full simulation of the process in the furnace, so that prediction of the coking condition of a hearth of the boiler becomes a feasible research means. Aiming at a 600t/h pulverized coal boiler of a power station, a FLUENT computational fluid dynamics software is used as a basis, according to the characteristics of the pulverized coal boiler to be simulated, Gambit software is used for establishing a three-dimensional frame structure of a hearth, grid division is carried out, and boundary conditions are set; and then, selecting a proper mathematical physical model and proper parameters and variables, carrying out numerical calculation on the process in the furnace, and researching the stability of combustion, the combustion efficiency, the desulfurization efficiency, the NOx emission rule and the like. Then, a stainless steel baffle plate is added below the arc-shaped guide plate right above the outlet of the economizer, 5 stainless steel baffle plates are added in total, stainless steel bars with the diameter of 8mm are used for diagonal bracing, partition and welding below the arc-shaped guide plate, stainless steel anti-abrasion tiles are combined and used below the tube bank, the flow speed and the direction of flue gas entering the tube bank of the economizer are changed, the scouring and the abrasion of high-temperature flue gas on the heating surface of the tube are reduced, and the dust deposition at the position of the economizer is reduced
The utility model has the advantages that: the boiler flue gas can be uniformly distributed with a certain smoke velocity to flow through the economizer, so that the flue gas at each section can be uniformly recycled, the smoke exhaust temperature is reduced, the pipe row of the economizer is completely prevented from being scoured and worn, the accident shutdown frequency is reduced, and the heat efficiency of the boiler is improved.
The present invention will be further explained with reference to the drawings and examples.
Drawings
Fig. 1 is the utility model discloses boiler afterbody flue improves device's schematic structure view.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is not intended to limit the invention.
Example 1
As shown in fig. 1, an improved device for a boiler tail flue comprises a higher-level economizer, wherein an arc-shaped guide plate 2 is arranged right above an outlet 1 of the higher-level economizer and used for flue gas diversion, and the lower part of the arc-shaped guide plate 2 is connected with a supporting device 4 above a lower-level economizer 3.
The arc-shaped guide plate 2 is arranged on the supporting device 4.
The arc-shaped guide plates 2 are a plurality of arc-shaped plates which are sequentially arranged from south to north in the flue and used for changing the direction of flue gas;
the support device 4 is formed by welding an inclined strut partition with 8mm stainless steel bars below the arc-shaped guide plate, and is used for supporting the guide plate and strengthening the strength of the guide plate.
The utility model discloses connect directly over the economizer export, arc guide plate below and between the economizer of subordinate.
The narrow aerodynamic field and the temperature field in the furnace are analyzed through full simulation of the process in the furnace, so that prediction of the coking condition of a hearth of the boiler becomes a feasible research means. Aiming at a 600t/h pulverized coal boiler of a power station, a FLUENT computational fluid dynamics software is used as a basis, according to the characteristics of the pulverized coal boiler to be simulated, Gambit software is used for establishing a three-dimensional frame structure of a hearth, grid division is carried out, and boundary conditions are set; and then, selecting a proper mathematical physical model and proper parameters and variables, carrying out numerical calculation on the process in the furnace, and researching the stability of combustion, the combustion efficiency, the desulfurization efficiency, the NOx emission rule and the like. And then, a stainless steel baffle plate is additionally arranged under the arc-shaped guide plate right above the outlet of the economizer, 5 stainless steel baffle plates are arranged in total, stainless steel bars with the diameter of 8mm are used as inclined struts for partition welding under the arc-shaped guide plate, and stainless steel anti-abrasion tiles are combined under the tube bank for simultaneous use, so that the flow, flow speed and direction of flue gas entering the tube bank of the economizer are changed, the scouring and abrasion of high-temperature flue gas on the heating surface of the tube are reduced, and the dust deposition at the position of the economizer is reduced.
Claims (4)
1. Boiler afterbody flue improves device, its characterized in that: the device comprises a higher-level economizer, wherein an arc-shaped guide plate is arranged right above an outlet of the higher-level economizer and used for flue gas diversion, and a supporting device above the lower-level economizer is connected below the arc-shaped guide plate.
2. The boiler back flue improvement device according to claim 1, characterized in that: the arc-shaped guide plate is arranged on the supporting device.
3. The boiler back flue improvement device according to claim 1, characterized in that: the arc guide plate is a plurality of arc plates which are arranged in the flue side by side and used for changing the direction of the flue gas.
4. The boiler back flue improvement device according to claim 1, characterized in that: the supporting device is formed by welding stainless steel bars below the arc-shaped guide plate as diagonal bracing partitions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020540616.9U CN212157221U (en) | 2020-04-14 | 2020-04-14 | Boiler tail flue improving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020540616.9U CN212157221U (en) | 2020-04-14 | 2020-04-14 | Boiler tail flue improving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212157221U true CN212157221U (en) | 2020-12-15 |
Family
ID=73720422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020540616.9U Active CN212157221U (en) | 2020-04-14 | 2020-04-14 | Boiler tail flue improving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212157221U (en) |
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2020
- 2020-04-14 CN CN202020540616.9U patent/CN212157221U/en active Active
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