CN211854062U - Flue structure for improving top peak capacity of thermal power generating unit - Google Patents
Flue structure for improving top peak capacity of thermal power generating unit Download PDFInfo
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- CN211854062U CN211854062U CN202020277935.5U CN202020277935U CN211854062U CN 211854062 U CN211854062 U CN 211854062U CN 202020277935 U CN202020277935 U CN 202020277935U CN 211854062 U CN211854062 U CN 211854062U
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- shaped guide
- induced draft
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Abstract
A flue structure for improving the top peak capacity of a thermal power generating unit comprises a first induced draft fan outlet flue, a second induced draft fan outlet flue, a desulfurization inlet flue, a first arc-shaped guide plate, a second arc-shaped guide plate and a plane guide plate; the outlet of the flue of the first induced draft fan is communicated with the first inlet of the desulfurization inlet flue, the outlet of the flue of the second induced draft fan is communicated with the second inlet of the desulfurization inlet flue, the two inlets are arranged oppositely, and the central line is perpendicular to the central line of the desulfurization inlet flue; one end of the first arc-shaped guide plate is tangent to the incoming flow direction of the outlet flue of the first induced draft fan, the other end of the first arc-shaped guide plate is tangent to the central line direction of the desulfurization inlet flue, and the concave surface of the first arc-shaped guide plate faces the outgoing flow direction of the desulfurization inlet flue; the two arc-shaped guide plates are symmetrically distributed; the vertical setting of plane guide plate is in desulfurization entry flue center, and two arc guide plates all meet and tangent with the plane guide plate. The flue structure of this scheme can avoid boiler draught fan stall, improves thermal power generating unit top peak ability.
Description
Technical Field
The utility model belongs to the technical field of thermal power, especially, relate to a flue structure for improving thermal power generating unit top peak ability.
Background
According to the regulation of operation rules (trial) of the northeast power auxiliary service market in the northeast monitoring market (2016) 252, rotary standby transaction varieties are additionally arranged to realize full coverage of 'depression valleys and top peaks' of the auxiliary service market, and meanwhile, in order to stimulate and guide the thermal power plant to actively improve the top peak capacity, a current bidding mechanism of the peak rotary standby market is also designed in the operation rules (trial) of the northeast power auxiliary service market.
At present, in the heavy-load operation process of a thermal power generating unit, a boiler induced draft fan has the problem of flow mismatching in the working process, so that the problem of wind robbing and stall is easily caused under the conditions of large flow and variable working conditions, and the peak capacity of the thermal power generating unit is finally influenced.
SUMMERY OF THE UTILITY MODEL
The problem that exists to prior art, the utility model provides a flue structure for improving thermal power generating unit top peak ability has the unmatched problem of flow to the boiler draught fan in the course of the work, can effectively avoid the boiler draught fan stall to appear under the low discharge condition and the variable working condition, has effectively improved thermal power generating unit's top peak ability.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a flue structure for improving the top peak capacity of a thermal power generating unit comprises a first induced draft fan outlet flue, a second induced draft fan outlet flue, a desulfurization inlet flue, a first arc-shaped guide plate, a second arc-shaped guide plate and a plane guide plate; the flow of the first induced draft fan outlet flue is larger than that of the second induced draft fan outlet flue, an outflow port of the first induced draft fan outlet flue is communicated with a first inflow port of the desulfurization inlet flue, an outflow port of the second induced draft fan outlet flue is communicated with a second inflow port of the desulfurization inlet flue, the first inflow port and the second inflow port of the desulfurization inlet flue are arranged in a right-to-right mode, and a central connecting line of the first inflow port and the second inflow port is perpendicular to a central line of the desulfurization inlet flue; one end of the first arc-shaped guide plate is tangent to the incoming flow direction of the flue outlet of the first induced draft fan, the other end of the first arc-shaped guide plate is tangent to the central line direction of the desulfurization inlet flue, and the concave surface of the first arc-shaped guide plate faces the outgoing flow direction of the desulfurization inlet flue; the second arc-shaped guide plate and the first arc-shaped guide plate have the same structure and size, and are symmetrically arranged relative to the central line of the desulfurization inlet flue; one end of the second arc-shaped guide plate is tangent to the incoming flow direction of the flue outlet of the second induced draft fan, the other end of the second arc-shaped guide plate is tangent to the central line direction of the desulfurization inlet flue, and the concave surface of the second arc-shaped guide plate faces the outgoing flow direction of the desulfurization inlet flue; the vertical setting of plane guide plate is in the center of desulfurization entry flue, first arc guide plate and second arc guide plate all meet and tangent with the plane guide plate.
The first arc-shaped guide plate, the second arc-shaped guide plate and the plane guide plate are all made of carbon steel plates.
The first arc-shaped guide plate, the second arc-shaped guide plate and the plane guide plate are all supported through the multilayer steel pipe.
The first arc-shaped guide plate, the second arc-shaped guide plate and the plane guide plate are connected with the desulfurization inlet flue in a welding mode.
The utility model has the advantages that:
the utility model is used for improve flue structure of thermal power generating unit top peak ability, to the unmatched problem of boiler draught fan flow existence in the course of the work, can effectively avoid the boiler draught fan stall to appear under the low discharge condition and the variable working condition, effectively improved thermal power generating unit's top peak ability.
Drawings
Fig. 1 is a schematic diagram of a flue structure for improving a peak ejecting capacity of a thermal power generating unit according to the present invention;
in the drawing, 1-first induced draft fan outlet flue, 2-second induced draft fan outlet flue, 3-desulfurization inlet flue, 4-first arc guide plate, 5-second arc guide plate, 6-plane guide plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a flue structure for improving the top peak capacity of a thermal power generating unit comprises a first induced draft fan outlet flue 1, a second induced draft fan outlet flue 2, a desulfurization inlet flue 3, a first arc-shaped guide plate 4, a second arc-shaped guide plate 5 and a plane guide plate 6; the flow of the first induced draft fan outlet flue 1 is greater than that of the second induced draft fan outlet flue 2, the outflow port of the first induced draft fan outlet flue 1 is communicated with the first inflow port of the desulfurization inlet flue 3, the outflow port of the second induced draft fan outlet flue 2 is communicated with the second inflow port of the desulfurization inlet flue 3, the first inflow port and the second inflow port of the desulfurization inlet flue 3 are arranged in a manner of being opposite to each other, and the central connecting line of the first inflow port and the second inflow port is perpendicular to the central line of the desulfurization inlet flue 3; one end of the first arc-shaped guide plate 4 is tangent to the inflow direction of the outflow port of the first induced draft fan outlet flue 1, the other end of the first arc-shaped guide plate 4 is tangent to the central line direction of the desulfurization inlet flue 3, and the concave surface of the first arc-shaped guide plate 4 faces the outflow direction of the desulfurization inlet flue 3; the second arc-shaped guide plate 5 and the first arc-shaped guide plate 4 have the same structure and size, and the second arc-shaped guide plate 5 and the first arc-shaped guide plate 4 are symmetrically arranged relative to the central line of the desulfurization inlet flue 3; one end of the second arc-shaped guide plate 5 is tangent to the inflow direction of the outflow port of the second induced draft fan outlet flue 2, the other end of the second arc-shaped guide plate 5 is tangent to the central line direction of the desulfurization inlet flue 3, and the concave surface of the second arc-shaped guide plate 5 faces the outflow direction of the desulfurization inlet flue 3; the plane guide plate 6 is vertically arranged at the center of the desulfurization inlet flue 3, and the first arc-shaped guide plate 4 and the second arc-shaped guide plate 5 are both connected and tangent with the plane guide plate 6.
The first arc-shaped guide plate 4, the second arc-shaped guide plate 5 and the plane guide plate 6 are all made of carbon steel plates, and are specifically made of 6mm carbon steel plates.
First arc guide plate 4, second arc guide plate 5 and plane guide plate 6 all support through the multilayer steel pipe, specifically adopt the three-layer steel pipe to support, and the steel pipe that just is as supporting is the steel pipe that the wall thickness is 4.5mm, the pipe diameter is 108 mm.
All link to each other through the welding mode between first arc guide plate 4, second arc guide plate 5 and the plane guide plate 6 and the desulfurization entry flue 3, specifically adopt 100mm two-sided to be interrupted the welding, and weld crater height is greater than 8 mm. In addition, for the original support in the desulfurization inlet flue 3, a yielding hole can be formed in the guide plate, and after the original support penetrates through the yielding hole of the guide plate, welding is performed at the hole.
To traditional flue structure, two draught fan outlet flues do not have any water conservancy diversion structure with desulfurization entry flue in the junction, and the incoming flow of two draught fan outlet flues can directly produce pressure offset this moment, because there is the mismatching problem in the flow of two draught fan outlet flues, under pressure offset, the incoming flow of the lower draught fan outlet flue of flow can be suppressed to draught fan stall appears, can influence the top peak capacity of thermal power unit finally.
The utility model discloses in, increased the water conservancy diversion structure in intersection at two draught fan export flues and desulfurization entry flues for the first time, because the existence of water conservancy diversion structure, directly blocked the incoming flow offset of two draught fan export flues, make the incoming flow of two draught fan export flues can both be steady converge in the desulfurization entry flue, also avoided the emergence of draught fan stall simultaneously, finally make thermal power unit's top peak ability promote.
The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. The utility model provides a flue structure for improving thermal power generating unit top peak ability which characterized in that: the device comprises a first induced draft fan outlet flue, a second induced draft fan outlet flue, a desulfurization inlet flue, a first arc-shaped guide plate, a second arc-shaped guide plate and a plane guide plate; the flow of the first induced draft fan outlet flue is larger than that of the second induced draft fan outlet flue, an outflow port of the first induced draft fan outlet flue is communicated with a first inflow port of the desulfurization inlet flue, an outflow port of the second induced draft fan outlet flue is communicated with a second inflow port of the desulfurization inlet flue, the first inflow port and the second inflow port of the desulfurization inlet flue are arranged in a right-to-right mode, and a central connecting line of the first inflow port and the second inflow port is perpendicular to a central line of the desulfurization inlet flue; one end of the first arc-shaped guide plate is tangent to the incoming flow direction of the flue outlet of the first induced draft fan, the other end of the first arc-shaped guide plate is tangent to the central line direction of the desulfurization inlet flue, and the concave surface of the first arc-shaped guide plate faces the outgoing flow direction of the desulfurization inlet flue; the second arc-shaped guide plate and the first arc-shaped guide plate have the same structure and size, and are symmetrically arranged relative to the central line of the desulfurization inlet flue; one end of the second arc-shaped guide plate is tangent to the incoming flow direction of the flue outlet of the second induced draft fan, the other end of the second arc-shaped guide plate is tangent to the central line direction of the desulfurization inlet flue, and the concave surface of the second arc-shaped guide plate faces the outgoing flow direction of the desulfurization inlet flue; the vertical setting of plane guide plate is in the center of desulfurization entry flue, first arc guide plate and second arc guide plate all meet and tangent with the plane guide plate.
2. The flue structure for improving the top spike capability of the thermal power generating unit according to claim 1, wherein: the first arc-shaped guide plate, the second arc-shaped guide plate and the plane guide plate are all made of carbon steel plates.
3. The flue structure for improving the top spike capability of the thermal power generating unit according to claim 1, wherein: the first arc-shaped guide plate, the second arc-shaped guide plate and the plane guide plate are all supported through the multilayer steel pipe.
4. The flue structure for improving the top spike capability of the thermal power generating unit according to claim 1, wherein: the first arc-shaped guide plate, the second arc-shaped guide plate and the plane guide plate are connected with the desulfurization inlet flue in a welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020277935.5U CN211854062U (en) | 2020-03-09 | 2020-03-09 | Flue structure for improving top peak capacity of thermal power generating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020277935.5U CN211854062U (en) | 2020-03-09 | 2020-03-09 | Flue structure for improving top peak capacity of thermal power generating unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211854062U true CN211854062U (en) | 2020-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020277935.5U Active CN211854062U (en) | 2020-03-09 | 2020-03-09 | Flue structure for improving top peak capacity of thermal power generating unit |
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|---|---|
| CN (1) | CN211854062U (en) |
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2020
- 2020-03-09 CN CN202020277935.5U patent/CN211854062U/en active Active
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