CN104594493A - Circulating water outfall structure for thermal power plant - Google Patents
Circulating water outfall structure for thermal power plant Download PDFInfo
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- CN104594493A CN104594493A CN201510036023.2A CN201510036023A CN104594493A CN 104594493 A CN104594493 A CN 104594493A CN 201510036023 A CN201510036023 A CN 201510036023A CN 104594493 A CN104594493 A CN 104594493A
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Abstract
The invention discloses a circulating water outfall structure for a thermal power plant. The circulating water outfall structure comprises a discharge chute formed in the tail end of a drainage channel, two side wing walls, a stilling pool and a stilling pool outlet end wall, wherein broken line-shaped guide walls for heat dissipation are arranged in the stilling pool along the water flow direction. The pair of broken line-shaped guide walls is arranged in a mirror symmetry mode by using the center of an outfall, the broken line-shaped guide walls adopt four sections of broken lines, the four sections of broken lines are used for equally dividing the stilling pool along the water flow direction, the broken point of each section of broken line is located on the cross section of the equally divided stilling pool, the first section and the third section are diffusion sections, the second section and the fourth section are contraction sections, and the included angle between the two connected sections of broken lines is 160-175 degrees. After warm discharge water in the thermal power plant drains through the drainage channel, plane diffusion of a water flow is completed in the discharge chute, so that the contact area of the warm discharge water and air is increased and is beneficial for heat dissipation. After the water flow enters the stilling pool, under the guide of the broken line-shaped guide walls, a vortex flow in the horizontal direction is generated while a vertical hydraulic jump is formed in the pool, so that the water flow is sufficiently aerified, the heat exchange of the water flow and surrounding air is strengthened, the temperature of the warm discharge water in the thermal power plant is effectively reduced, and the heat pollution for receiving water is reduced.
Description
Technical field
The present invention relates to the drain structure for water of circulating-water in thermal power plant surface water channel, specifically, in outfall, setting up the cooling mechanism for effectively reducing circulating water temperature exactly.
Background technology
Circulating Cooling Water of Power Plant taking and discharging system is divided into circulating water supply system and direct drainage system.The drainage system of what most power plant of current China adopted is direct cooling, this cooling water is referred to as warm water discharge usually.After this warm water discharge enters receiving water body, can directly or indirectly have an impact to aquatile.When power plant's warm water discharge has a negative impact to aquatile, be called heat pollution.Great destruction can be produced to the ecological environment of receiving water body time seriously polluted.
Under the prerequisite making full use of power plant cooling water waste heat, for reducing the heat pollution of warm water discharge, common way is the length and the drop that suitably increase steam power plant's surface water channel.This will cause the increase of civilwork engineering quantity and circulating pump head, thus increases civil engineering and dynamo-electric investment.And, be limited to site condition in some cases, the difficulty that long surface water channel can cause cloth to be set up.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of circulating-water in thermal power plant drain structure for water effectively reducing the temperature of power station warm water discharge and the heat pollution to receiving water body thereof.
In order to solve the problem, the technical solution used in the present invention is: a kind of circulating-water in thermal power plant drain structure for water, comprise be arranged in escape canal end let out groove, both sides aileron, absorption basin, absorption basin outlet headwall, in absorption basin, water (flow) direction is provided with the fold-line-shaped guide wall for dispelling the heat.
The one-sided angle of flare of described outfall both sides aileron controls between 4 °-10 °.
Described fold-line-shaped guide wall arranges a pair with outfall center line specular, the wall of fold-line-shaped guide wall is the first in the entrance point of absorption basin, wall tail is positioned at the port of export of absorption basin, fold-line-shaped guide wall adopts four sections of broken lines, four sections of broken lines along water (flow) direction by absorption basin decile, the break of every section of broken line is positioned on the cross section of decile absorption basin, first paragraph and the 3rd section are diffuser, second segment and the 4th section are contraction section, the break of the first paragraph broken line head end of two fold-line-shaped guide walls, the break of first section of the 3rd section of broken line, the break of the 4th section of broken line tail end lays respectively on the trisection point of absorption basin width in corresponding cross section, the angle be connected between two sections of broken lines is 160 °-175 °.
Described fold-line-shaped water conservancy diversion accordion wall height and absorption basin port of export both sides aileron are with high.
Described fold-line-shaped guide wall is reinforced concrete structure.
The invention has the beneficial effects as follows: the dissipate heat being beneficial to warm water discharge, effectively improve the radiating effect of escape canal, reduce power plant's warm water discharge to the heat pollution of receiving water body.
Accompanying drawing explanation
Fig. 1 is the plan view of circulating-water in thermal power plant drain structure for water of the present invention.
Fig. 2 is the sectional side elevation in Fig. 1.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
As shown in Figure 1, 2, circulating-water in thermal power plant drain structure for water of the present invention, comprise be arranged in escape canal 1 end let out groove 2, both sides aileron 3, absorption basin 4, absorption basin outlet headwall 6, in absorption basin 4, water (flow) direction is provided with the fold-line-shaped guide wall 5 for dispelling the heat.
The one-sided angle of flare of described outfall both sides aileron 3 controls between 4 °-10 °.
Preferably, described fold-line-shaped guide wall 5 arranges a pair with outfall center line specular, the wall of fold-line-shaped guide wall 5 is the first in the entrance point of absorption basin 4, wall tail is positioned at the port of export of absorption basin 4, fold-line-shaped guide wall 5 adopts four sections of broken lines, four sections of broken lines along water (flow) direction by absorption basin 4 decile, the break of every section of broken line is positioned on the cross section of decile absorption basin, first paragraph and the 3rd section are diffuser, second segment and the 4th section are contraction section, the break of the first paragraph broken line head end of two fold-line-shaped guide walls 5, the break of first section of the 3rd section of broken line, the break of the 4th section of broken line tail end lays respectively on the trisection point of absorption basin 4 width in corresponding cross section, the angle be connected between two sections of broken lines is 160 °-175 °.
Fold-line-shaped water conservancy diversion accordion wall 5 height and absorption basin 4 port of export both sides aileron are with high.
Described fold-line-shaped guide wall 5 is reinforced concrete structure.
In outfall absorption basin, set up concrete fold-line-shaped guide wall, guide absorption basin bottom water flow to produce reflexion and scour flow, while making, in absorption basin, vertical hydraulic jump occurs, generation level is to eddy current.Arrange in conjunction with the diffusion of absorption basin abutment wall bell mouth shape, the contact area of current and air in absorption basin is increased greatly.
After power plant's warm water discharge is discharged via escape canal 1, letting out the planar diffusion completing current in groove 2, increase the contact area of warm water discharge and air, in order to dissipate heat.After current enter absorption basin 4, under the guiding of fold-line-shaped guide wall 5, form vertical hydraulic jump in pond while, generation level is to eddy current, make the abundant aeration of current, strengthen the interchange of heat of current and ambient air, and then effectively reduce the temperature of power plant's warm water discharge, reduce the heat pollution to receiving water body.
Certain external steam power plant escape canal is limited to site condition, channel overall length 1487m, width of the channel 3.5m, design base slope 0.765 ‰.For ensureing power plant's warm water discharge radiating effect, have employed the circulating-water in thermal power plant drain structure for water setting up fold-line-shaped guide wall.
The one-sided angle of flare design employing 6 ° of outfall both sides aileron.The wide 7.25m of absorption basin stem, exit width 10m, in pond, cooling mechanism adopts reinforced concrete structure fold-line-shaped guide wall.The angle be connected between two sections of broken lines is employing 162 °.Guide wall outlet height and absorption basin exit end face aileron are with high.This design also obtains good result in practice by the examination & approval of local environmental administration smoothly.
Above-described embodiment is only for illustration of technological thought of the present invention and feature, its object is to enable those skilled in the art understand content of the present invention and implement according to this, only can not limit the scope of the claims of the present invention with the present embodiment, namely the equal change done of all disclosed spirit or modification, still drop in the scope of the claims of the present invention.
Claims (5)
1. a circulating-water in thermal power plant drain structure for water, comprise be arranged in escape canal (1) end let out groove (2), both sides aileron (3), absorption basin (4), absorption basin outlet headwall (6), it is characterized in that, in absorption basin (4), water (flow) direction being provided with the fold-line-shaped guide wall (5) for dispelling the heat.
2. circulating-water in thermal power plant drain structure for water according to claim 1, is characterized in that, the one-sided angle of flare of described outfall both sides aileron (3) controls between 4 °-10 °.
3. circulating-water in thermal power plant drain structure for water according to claim 1 and 2, it is characterized in that, described fold-line-shaped guide wall (5) arranges a pair with outfall center line specular, the wall of fold-line-shaped guide wall (5) is the first in the entrance point of absorption basin (4), wall tail is positioned at the port of export of absorption basin (4), fold-line-shaped guide wall (5) adopts four sections of broken lines, four sections of broken lines along water (flow) direction by absorption basin (4) decile, the break of every section of broken line is positioned on the cross section of decile absorption basin, first paragraph and the 3rd section are diffuser, second segment and the 4th section are contraction section, the break of the first paragraph broken line head end of two fold-line-shaped guide walls (5), the break of first section of the 3rd section of broken line, the break of the 4th section of broken line tail end lays respectively on the trisection point of absorption basin (4) width in corresponding cross section, the angle be connected between two sections of broken lines is 160 °-175 °.
4. circulating-water in thermal power plant drain structure for water according to claim 3, is characterized in that, described fold-line-shaped water conservancy diversion accordion wall (5) height and absorption basin (4) port of export both sides aileron are with high.
5. circulating-water in thermal power plant drain structure for water according to claim 1, is characterized in that, described fold-line-shaped guide wall (5) is reinforced concrete structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510036023.2A CN104594493B (en) | 2015-01-23 | 2015-01-23 | Circulating-water in thermal power plant drain structure for water |
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| CN201510036023.2A CN104594493B (en) | 2015-01-23 | 2015-01-23 | Circulating-water in thermal power plant drain structure for water |
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| CN104594493B CN104594493B (en) | 2016-08-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109457784A (en) * | 2018-12-28 | 2019-03-12 | 启明星宇节能科技股份有限公司 | A kind of flue gas separates drainage arrangement with sewage |
| CN115168964A (en) * | 2022-07-26 | 2022-10-11 | 中国水利水电科学研究院 | Design method of power plant near-shore bent open drainage channel for preventing thermal pollution close to shore |
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| US6588370B1 (en) * | 2001-10-03 | 2003-07-08 | The United States Of America As Represented By The Secretary Of The Interior | Labyrinth weir and pool fishway |
| CN202440921U (en) * | 2011-11-15 | 2012-09-19 | 重庆大学 | Drain open canal for controlling rainwater runoff of construction district by baffled processing |
| CN203256706U (en) * | 2013-05-24 | 2013-10-30 | 中国水电顾问集团北京勘测设计研究院 | Underflow energy dissipation structure of broken slope in hydraulic and hydroelectric projects |
| CN103498449A (en) * | 2013-09-02 | 2014-01-08 | 李尚喜 | Novel folded lifting rubber board water retaining dam |
| CN104179235A (en) * | 2013-05-21 | 2014-12-03 | 贵阳铝镁设计研究院有限公司 | Discharging method and discharging structure for industrial waste heat waste water based on open water body |
| CN204475477U (en) * | 2015-01-23 | 2015-07-15 | 中水北方勘测设计研究有限责任公司 | A kind of circulating-water in thermal power plant drain structure for water |
-
2015
- 2015-01-23 CN CN201510036023.2A patent/CN104594493B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6588370B1 (en) * | 2001-10-03 | 2003-07-08 | The United States Of America As Represented By The Secretary Of The Interior | Labyrinth weir and pool fishway |
| CN202440921U (en) * | 2011-11-15 | 2012-09-19 | 重庆大学 | Drain open canal for controlling rainwater runoff of construction district by baffled processing |
| CN104179235A (en) * | 2013-05-21 | 2014-12-03 | 贵阳铝镁设计研究院有限公司 | Discharging method and discharging structure for industrial waste heat waste water based on open water body |
| CN203256706U (en) * | 2013-05-24 | 2013-10-30 | 中国水电顾问集团北京勘测设计研究院 | Underflow energy dissipation structure of broken slope in hydraulic and hydroelectric projects |
| CN103498449A (en) * | 2013-09-02 | 2014-01-08 | 李尚喜 | Novel folded lifting rubber board water retaining dam |
| CN204475477U (en) * | 2015-01-23 | 2015-07-15 | 中水北方勘测设计研究有限责任公司 | A kind of circulating-water in thermal power plant drain structure for water |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109457784A (en) * | 2018-12-28 | 2019-03-12 | 启明星宇节能科技股份有限公司 | A kind of flue gas separates drainage arrangement with sewage |
| CN115168964A (en) * | 2022-07-26 | 2022-10-11 | 中国水利水电科学研究院 | Design method of power plant near-shore bent open drainage channel for preventing thermal pollution close to shore |
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| CN104594493B (en) | 2016-08-17 |
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