CN202899096U - Overflow weir type anti-foaming device - Google Patents
Overflow weir type anti-foaming device Download PDFInfo
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- CN202899096U CN202899096U CN2012205919841U CN201220591984U CN202899096U CN 202899096 U CN202899096 U CN 202899096U CN 2012205919841 U CN2012205919841 U CN 2012205919841U CN 201220591984 U CN201220591984 U CN 201220591984U CN 202899096 U CN202899096 U CN 202899096U
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Abstract
The utility model discloses an overflow weir type anti-foaming device which comprises a siphon well and a first curve practical weir. The first curve practical weir is arranged in the siphon well, at least one curve practical weir is arranged on the lower course of the first curve practical weir, the curve practical weir is lower than the first curve practical weir, and a draining bottom hole is arranged at the bottom of the curve practical weir. At least one curve practical weir is arranged on the lower course of the first curve practical weir, so that water level of the lower course of the first curve practical weir rises, flow fall of the first curve practical weir is further reduced, entrainment aeration is also reduced correspondingly, and the draining bottom hole is further arranged at the bottom of the curve practical weir, so that a part of water flow is drained to the lower course through the draining bottom hole, hydraulic drop aeration is not caused again, and air carrying concentration in the water flow is also reduced correspondingly, bubbles are reduced, and produced foams are also reduced correspondingly. The overflow weir type anti-foaming device is used in the field of coastal firepower and cooling water circulation systems of a nuclear power plant.
Description
Technical field
The utility model relates to a kind of overflow weir, and particularly a kind of overflow weir formula for strand firepower and nuclear power plant's cooling water recirculation system presses down bulb apparatus.
Background technology
Adopt strand firepower electrical plant and the nuclear power plant of direct cooling way of supplying water, generally all be provided with the drain siphon well, utilize siphonage to reduce circulating pump head.In practical engineering application, siphonic water-collecting well mainly utilizes overflow weir to carry out draining, owing to will keep the siphonage of reclaimed water system, the water level of siphonic water-collecting well overflow weir crest need remain on certain altitude, cause like this discharged circulated cooling water and downstream water body to have certain drop, fierce collision occurs with the downstream water body and produces hydraulic jump in recirculated cooling water after siphonic water-collecting well overflow weir and outfall are fallen, when site elevation was higher, this phenomenon was more obvious.Because the turbulent fluctuation effect of current, produce countless big or small whirlpools on the hydraulic jump top layer, water surface big ups and downs are a large amount of water droplets of broken formation then, water droplet returns in the water body process, bring large quantity of air into, the aeration phenomenon occurs, and the aeration that acutely entrainments of energy dissipation by hydraulic jump is the Fundamentals that produce little water droplet, salt fog and foam.For preventing that marine growth is attached to the cooling water system pipeline; the recirculating cooling water system of general Coastal Power Plant all can add medicine such as clorox is processed; the materials such as the residual body of marine growth and clorox; can change the stickiness of water body; the physical propertys such as surface tension; cause the bubble that produces in the water body to rise to be difficult for crumbling and fall behind the water surface and be gathered into foam; the foam that these are difficult for crumbling and fall; cause visual pollution to a certain degree; for eliminating the organoleptic effects of recirculated water draining foam; some power plant add defoamer in the recirculated water drainage system; not only increased the operating cost of power plant, defoamer can produce secondary pollution to marine environment again simultaneously, is unfavorable for the protection of marine environment.
Therefore, adopting rational engineering measure to carry out physical defoaming has great significance, and very rare for the research of engineering measure froth breaking both at home and abroad at present, only research is all not mature enough technically such as gear bubble wall, pressure water conservancy diversion box culvert, positive and negative swash plate heap etc., and defoaming effect is also relatively poor.
The utility model content
The technical problems to be solved in the utility model provide a kind of for strand firepower and nuclear power plant's cooling water recirculation system have remarkable froth breaking, the overflow weir formula that presses down the bubble effect presses down bulb apparatus.
For solving the problems of the technologies described above the technical scheme that adopts: a kind of overflow weir formula presses down bulb apparatus, comprise siphonic water-collecting well and be arranged on the first interior practical curved weir of siphonic water-collecting well, be provided with at least one practical curved weir at the first practical curved weir downstream part, practical curved weir is lower than the first practical curved weir, and the practical curved weir bottom is provided with the draining bottom outlet.
As improvement of the present utility model, the weir crest curve of each practical curved weir is identical with the weir crest curve of the first practical curved weir.
As of the present utility model preferred, practical curved weir is second practical curved weir that is arranged on the first practical curved weir downstream part, and the second practical curved weir bottom is provided with the water-bed hole of two first rows.
As of the present utility model preferred, practical curved weir is two, be respectively the second practical curved weir and the 3rd practical curved weir that set gradually in the first practical curved weir downstream, the 3rd practical curved weir is lower than the second practical curved weir, the second practical curved weir bottom is provided with the water-bed hole of a first row, and the 3rd practical curved weir bottom is provided with the water-bed hole of two second rows.
The beneficial effects of the utility model: by being provided with at least one practical curved weir at the first practical curved weir downstream part, so that the water level of the first practical curved weir downstream part is raised, and then the water drop that falls through the first practical curved weir is reduced, entrainment also corresponding reducing of aeration, simultaneously also be provided with the draining bottom outlet in the bottom of practical curved weir, make a part of current through the draining bottom outlet discharged to the downstream, can not reproduce into the drop aeration, hold also corresponding minimizing of gas concentration under the arm in the current like this, bubble has reduced, and then the foam that forms also can correspondingly reduce.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described;
Fig. 1 is transverse cross sectional view of the present utility model;
Fig. 2 is the cross section view of I-I among Fig. 1;
Fig. 3 is the cross section view of II-II among Fig. 1.
The specific embodiment
Referring to figs. 1 through Fig. 3, a kind of overflow weir formula of the utility model presses down bulb apparatus, comprise siphonic water-collecting well 1 and be arranged on the first practical curved weir 2 in the siphonic water-collecting well 1, be provided with at least one practical curved weir 3 at the first practical curved weir 2 downstream parts, practical curved weir 3 is lower than the first practical curved weir 2, and practical curved weir 3 bottoms are provided with draining bottom outlet 4.
By being provided with at least one practical curved weir 3 at the first practical curved weir 2 downstream parts, so that the water level of the first practical curved weir 2 downstream parts is raised, and then the water drop that falls through the first practical curved weir 2 is reduced, entrainment also corresponding reducing of aeration, simultaneously also be provided with draining bottom outlet 4 in the bottom of practical curved weir 3, make a part of current through draining bottom outlet 4 discharged to the downstream, can not reproduce into the drop aeration, hold also corresponding minimizing of gas concentration under the arm in the current like this, bubble has reduced, and then the foam that forms also can correspondingly reduce.
As improvement of the present utility model, the weir crest curve of each practical curved weir 3 is identical with the weir crest curve of the first practical curved weir 2.
As of the present utility model preferred, practical curved weir 3 can be two, be respectively the second practical curved weir 31 and the 3rd practical curved weir 32 that set gradually in the first practical curved weir 2 downstreams, the 3rd practical curved weir 32 is lower than the second practical curved weir 31, the second practical curved weir 31 bottoms are provided with 41, the three practical curved weirs, 32 bottoms, the water-bed hole of a first row and are provided with the water-bed hole 42 of two second rows.
By setting up the second practical curved weir 31 and the 3rd practical curved weir 32, form the form of three grades of overflows, can reduce water drop and reduce the intensity that hydraulic jump is rolled, the current air entrainment is obviously reduced, defoaming effect is remarkable.
Certainly, practical curved weir 3 can be the second practical curved weir 31, the second practical curved weirs 31 bottoms that are arranged on the first practical curved weir 2 downstream parts and is provided with the water-bed hole 41 of two first rows.
By setting up the second practical curved weir 31, form the form of secondary overflow, structure design is more simple like this.
The above has done detailed description to embodiment of the present utility model by reference to the accompanying drawings; need to prove; a kind of overflow weir formula of the utility model presses down the form that bulb apparatus is not limited only to adopt secondary or three grades of overflows; as long as adopt the form of a plurality of practical weir combinations with the draining bottom outlet; realize multistage drop; multilayer is blocked bubble and is forced the short distance come-up, reduces the current aeration, then still falls into protection domain of the present utility model.
Claims (4)
1. an overflow weir formula presses down bulb apparatus, it is characterized in that: comprise siphonic water-collecting well (1) and be arranged on interior the first practical curved weir (2) of described siphonic water-collecting well (1), be provided with at least one practical curved weir (3) at described the first practical curved weir (2) downstream part, described practical curved weir (3) is lower than the first practical curved weir (2), and described practical curved weir (3) bottom is provided with draining bottom outlet (4).
2. overflow weir formula according to claim 1 presses down bulb apparatus, and it is characterized in that: the weir crest curve of described each practical curved weir (3) is identical with the weir crest curve of the first practical curved weir (2).
3. overflow weir formula according to claim 1 and 2 presses down bulb apparatus, it is characterized in that: described practical curved weir (3) is second practical curved weir (31) that is arranged on the first practical curved weir (2) downstream part, and described the second practical curved weir (31) bottom is provided with the water-bed hole (41) of two first rows.
4. overflow weir formula according to claim 1 and 2 presses down bulb apparatus, it is characterized in that: described practical curved weir (3) is two, be respectively the second practical curved weir (31) and the 3rd practical curved weir (32) that set gradually in described the first practical curved weir (2) downstream, described the 3rd practical curved weir (32) is lower than the second practical curved weir (31), described the second practical curved weir (31) bottom is provided with the water-bed hole (41) of a first row, and described the 3rd practical curved weir (32) bottom is provided with the water-bed hole (42) of two second rows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205919841U CN202899096U (en) | 2012-11-09 | 2012-11-09 | Overflow weir type anti-foaming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205919841U CN202899096U (en) | 2012-11-09 | 2012-11-09 | Overflow weir type anti-foaming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202899096U true CN202899096U (en) | 2013-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205919841U Expired - Lifetime CN202899096U (en) | 2012-11-09 | 2012-11-09 | Overflow weir type anti-foaming device |
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| Country | Link |
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| CN (1) | CN202899096U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105297682A (en) * | 2015-11-11 | 2016-02-03 | 中国水利水电第十四工程局有限公司 | Force eliminating drainage facility |
| CN105862683A (en) * | 2016-04-22 | 2016-08-17 | 广东省水利水电科学研究院 | Multi-layer and multi-order pore plate used for reducing aeration and restraining bubbles and rapid construction method for multi-layer and multi-order pore plate |
| CN108335605A (en) * | 2018-02-11 | 2018-07-27 | 河海大学 | A kind of multipurpose weir flow device suitable for teaching experiment |
| CN109138064A (en) * | 2018-09-20 | 2019-01-04 | 广东省水利水电科学研究院 | Anti- aeration method and head-tank equipped with anti-aeration structure |
| CN109487762A (en) * | 2018-12-19 | 2019-03-19 | 中国电建集团中南勘测设计研究院有限公司 | A kind of annular overflow weir with diversion pier |
| CN115340141A (en) * | 2022-07-15 | 2022-11-15 | 国核电力规划设计研究院有限公司 | Drainage channel internal bag type defoaming device and defoaming method |
-
2012
- 2012-11-09 CN CN2012205919841U patent/CN202899096U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105297682A (en) * | 2015-11-11 | 2016-02-03 | 中国水利水电第十四工程局有限公司 | Force eliminating drainage facility |
| CN105862683A (en) * | 2016-04-22 | 2016-08-17 | 广东省水利水电科学研究院 | Multi-layer and multi-order pore plate used for reducing aeration and restraining bubbles and rapid construction method for multi-layer and multi-order pore plate |
| CN108335605A (en) * | 2018-02-11 | 2018-07-27 | 河海大学 | A kind of multipurpose weir flow device suitable for teaching experiment |
| CN108335605B (en) * | 2018-02-11 | 2020-05-05 | 河海大学 | Multipurpose weir flow device suitable for teaching experiment |
| CN109138064A (en) * | 2018-09-20 | 2019-01-04 | 广东省水利水电科学研究院 | Anti- aeration method and head-tank equipped with anti-aeration structure |
| CN109487762A (en) * | 2018-12-19 | 2019-03-19 | 中国电建集团中南勘测设计研究院有限公司 | A kind of annular overflow weir with diversion pier |
| CN109487762B (en) * | 2018-12-19 | 2024-01-30 | 中国电建集团中南勘测设计研究院有限公司 | Annular overflow weir with flow guiding pier |
| CN115340141A (en) * | 2022-07-15 | 2022-11-15 | 国核电力规划设计研究院有限公司 | Drainage channel internal bag type defoaming device and defoaming method |
| CN115340141B (en) * | 2022-07-15 | 2024-05-10 | 国核电力规划设计研究院有限公司 | Bag-type defoaming device and defoaming method in drainage channel |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130424 |
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| CX01 | Expiry of patent term |