CN201329318Y - Small pressure difference constant-speed jet nozzle - Google Patents
Small pressure difference constant-speed jet nozzle Download PDFInfo
- Publication number
- CN201329318Y CN201329318Y CNU2008202116727U CN200820211672U CN201329318Y CN 201329318 Y CN201329318 Y CN 201329318Y CN U2008202116727 U CNU2008202116727 U CN U2008202116727U CN 200820211672 U CN200820211672 U CN 200820211672U CN 201329318 Y CN201329318 Y CN 201329318Y
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- pressure difference
- jet nozzle
- small pressure
- nozzle
- shell
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Abstract
The utility model provides a small pressure difference constant-speed jet nozzle, which comprises a shell and a valve cover, wherein a valve rod is arranged in the shell, the upper end of the valve rod is arranged on a gland in the valve cover, a spring is arranged between the valve cover and the shell, the bottom of the shell is connected with a taper burner cap, the valve rod in the taper burner cap is connected with an ejector nozzle retainer ring, and a flange is arranged on the lateral face of the shell. The small pressure difference constant-speed jet nozzle has the beneficial effects that since the opening degree of the ejector nozzle can be controlled according to flow changes of fluid due to rational design and specific performance of the spring, and constant flow speed of the outlet can be guaranteed under any working conditions to form better atomization degree. The small pressure difference constant-speed jet nozzle is applied in deaerators for controlling and sliding pressure of big machine sets with the grades of subcritical, supercritical and ultra-supercritical 300MW, 600MW and 1000MW. The resistance loss reduction of the deaerator jet nozzle enables power plants to select extraction pumps with smaller squeeze heads, long-term operation brings certain economic benefits for the power plants, and the jet nozzle is adopted by more heat systems at present.
Description
(1) technical field
The utility model relates to the water spraying atomization device of oxygen-eliminating device class in a kind of power station equipment.
(2) background technology
Oxygen-eliminating device is one of key equipment in the thermal power generation unit heat regenerative system, it is to introduce from the steam of extracting out in the steam turbine, come heat-setting water, make condensate water reach desired temperature, and remove dissolved oxygen and incondensable gas in the condensate water, be transported in the boiler as boiler feedwater, thereby improve the quality and the temperature of boiler feedwater, reduce unit oxygen corrosion, guarantee service life of other equipment in the unit, improving the thermal efficiency of unit, is one of equipment indispensable in the boiler feedwater heat regenerative system.
The constant speed nozzle is the critical component in the deaeration plant, increasingly serious and national increasing along with energy problem to the efforts at environmental protection dynamics, the generating set in thermal power plant also just constantly develops towards big capacity, high parameter, make workload and maintenance workload in order to reduce, the nozzle that is used for oxygen-eliminating device is exerted oneself also just towards big capacity development.
The original fixed nozzle of my company is exerted oneself to less than the 20t/h specification, and the pressure loss is more than the 0.1MPa.The shortcoming of this nozzle is: 1. can not satisfy the demand of power plant's heat regenerative system sliding pressure operation nowadays, make system that bigger energy loss be arranged, efficient is low.2. along with the increasingly serious and national increasing of energy problem to the efforts at environmental protection dynamics, the generating set in thermal power plant also just constantly develops towards big capacity, high parameter, it is little that single nozzle is exerted oneself, and must cause separate unit unit usage quantity many, and it is big to make workload and maintenance workload.3. usage quantity is many on the equipment will cause that perforate quantity is many on the housing, and leakage point is many.
At the problem that prior art exists, the constant speed nozzle arrangements that the utility model provides a kind of small pressure difference, exerts oneself greatly is applicable to big capacity unit oxygen-eliminating devices such as 300MW and above subcritical, overcritical, ultra supercritical.Satisfy the needs of fixed pressure operation and sliding pressure operation.
(3) summary of the invention
The purpose of this utility model is to provide a cover oxygen-eliminating device with small pressure difference, big flow, can reduce the SR loss, improves the small pressure difference constant speed nozzle of the thermal efficiency.
The purpose of this utility model is achieved in that it comprises housing and valve gap, valve rod is set in the housing, the valve rod upper end connects the gland that is arranged in the valve gap, spring is built between valve gap and the housing and is provided with, housing bottom is connected with Conic nozzle, the Conic nozzle inner valve stem connects the spout back-up ring, and the housing side is provided with flange.
The utility model also has some technical characterictics like this:
1, described housing is connected by bolt with valve gap, and the junction is provided with liner;
2, described valve rod is connected with nut by split pin with gland, spout back-up ring, and the junction is provided with packing ring;
3, described housing is connected by screw with Conic nozzle.
The utility model is applicable to the oxygen-eliminating device of big capacity sliding pressure operation units such as 300MW and above subcritical, overcritical, ultra supercritical, can reduce resistance, improves the thermal efficiency, under any operating mode, and the spout constant flow rate.When nozzle was in design rating, its drag losses was 0.06MPa, 0.035Mpa.And when equipment was exerted oneself variation, the jet expansion constant flow rate was constant.
Spring nozzle of the present utility model is that design rating 50t/h, design pressure loss 0.06MPa, 0.035Mpa. and design rating 100t/h, design pressure are lost 0.06MPa, 0.035Mpa.Utilize the experience and the data of original designs of nozzles, use, by resistance calculating, spring design, structure innovation, design the spring nozzle of plurality of specifications and draw out construction drawing, process model machine, and detected the design performance of nozzle by cold test by the workshop.Through actual cold test to 100t/h, 50t/h small pressure difference constant speed nozzle, drawing four kinds of nozzles all has good spray regime and atomization under various flows, satisfy fully that domestic oxygen-eliminating device load changes in 10%～110% scope and the eject request of small pressure difference.
The beneficial effects of the utility model are appropriate design and the characteristic property thereof owing to spring, can control the size of spout aperture according to the changes in flow rate of fluid, allow no matter to guarantee under which kind of operating mode that exit velocity is constant, forms fogging degree preferably.That the utility model is applicable to is subcritical, overcritical, the oxygen-eliminating device of ultra supercritical 300MW, 600MW, the big unit level pressure of 1000MW grade, sliding pressure operation.Reducing of oxygen-eliminating device nozzle resistance loss can make power plant select the slightly little condensate pump of pressure head, and long-time running can bring certain economic benefits to power plant, now just adopted by more therrmodynamic system.
(4) description of drawings
Fig. 1 is a structure cutaway view of the present utility model.
(5) specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described:
In conjunction with Fig. 1-2, the structure of present embodiment by valve gap 1, the gland 5 on top, be built in spring 6, housing 9 between valve gap 1 and gland 5 and the housing 9, be built in valve rod 10 in the housing 9, lower taper shower nozzle 12, spout back-up ring 13, and connectors such as flange 8, bolt 14, nut 3, split pin 2, packing ring 4, screw 11 form.Wherein valve rod 10 upper ends connect the gland 5 that is arranged in the valve gap 1, and spring 6 is built between valve gap 1 and the housing 9 and is provided with, and housing 9 bottoms are connected with Conic nozzle 12, and Conic nozzle 12 inner valve stem 10 connect spout back-up ring 13, and housing 9 sides are provided with flange 8.Housing 9 is connected by bolt 14 with valve gap 1, and the junction is provided with liner 7; Valve rod 10 is connected with nut 3 by split pin 2 with gland 5, spout back-up ring 13, and the junction is provided with packing ring 4; Housing 9 is connected by screw 11 with Conic nozzle 12.
Operation principle: fluid enters from flange 8 mouths of pipe of housing 9 sides, flow to the Conic nozzle 12 of bottom, masterpiece is used on the spout back-up ring 13, because back-up ring 13 links to each other with valve rod, its pressure is delivered on the valve rod 10, valve rod 10 interlock glands 5, with spring 6 compressions, the bottom spout is opened, and water is atomized ejection through Conic nozzle 12, reasonably spring design, make spout open a rational aperture, water is fully atomized, and the water that is atomized fully contacts with bottom steam, reaches the purpose of better heat and mass.
Claims (4)
1, a kind of small pressure difference constant speed nozzle, it comprises housing and valve gap, it is characterized in that being provided with in the housing valve rod, the valve rod upper end connects the gland that is arranged in the valve gap, spring is built between valve gap and the housing and is provided with, housing bottom is connected with Conic nozzle, and the Conic nozzle inner valve stem connects the spout back-up ring, and the housing side is provided with flange.
2, small pressure difference constant speed nozzle according to claim 1 is characterized in that described housing is connected by bolt with valve gap, and the junction is provided with liner.
3, small pressure difference constant speed nozzle according to claim 2 is characterized in that described valve rod is connected with nut by split pin with gland, spout back-up ring, and the junction is provided with packing ring.
4, small pressure difference constant speed nozzle according to claim 3 is characterized in that described housing is connected by screw with Conic nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202116727U CN201329318Y (en) | 2008-12-15 | 2008-12-15 | Small pressure difference constant-speed jet nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202116727U CN201329318Y (en) | 2008-12-15 | 2008-12-15 | Small pressure difference constant-speed jet nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201329318Y true CN201329318Y (en) | 2009-10-21 |
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ID=41222692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202116727U Expired - Lifetime CN201329318Y (en) | 2008-12-15 | 2008-12-15 | Small pressure difference constant-speed jet nozzle |
Country Status (1)
| Country | Link |
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| CN (1) | CN201329318Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102897864A (en) * | 2012-09-29 | 2013-01-30 | 无锡联营电力设备有限公司 | Atomizing nozzle of deaerator |
| CN102976428A (en) * | 2012-11-22 | 2013-03-20 | 青岛畅隆电力设备有限公司 | Novel towerless multi-water-atomizing-nozzle deaerator |
| CN103011323A (en) * | 2011-09-27 | 2013-04-03 | 施托克热能技术公司 | Spray type deaerator |
| CN107213842A (en) * | 2017-06-30 | 2017-09-29 | 广东利鑫智能科技有限公司 | A kind of improved automatic proportioning machine |
| CN110355153A (en) * | 2019-07-23 | 2019-10-22 | 浙江伟宙科技有限公司 | A kind of comprehensive tube cleaning arrangement |
-
2008
- 2008-12-15 CN CNU2008202116727U patent/CN201329318Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011323A (en) * | 2011-09-27 | 2013-04-03 | 施托克热能技术公司 | Spray type deaerator |
| CN102897864A (en) * | 2012-09-29 | 2013-01-30 | 无锡联营电力设备有限公司 | Atomizing nozzle of deaerator |
| CN102976428A (en) * | 2012-11-22 | 2013-03-20 | 青岛畅隆电力设备有限公司 | Novel towerless multi-water-atomizing-nozzle deaerator |
| CN107213842A (en) * | 2017-06-30 | 2017-09-29 | 广东利鑫智能科技有限公司 | A kind of improved automatic proportioning machine |
| CN110355153A (en) * | 2019-07-23 | 2019-10-22 | 浙江伟宙科技有限公司 | A kind of comprehensive tube cleaning arrangement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091021 |
|
| CX01 | Expiry of patent term |