CN207330980U - A kind of feedwater recirculating system for acting on evaporated flue natural cycle system - Google Patents
A kind of feedwater recirculating system for acting on evaporated flue natural cycle system Download PDFInfo
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- CN207330980U CN207330980U CN201721287242.9U CN201721287242U CN207330980U CN 207330980 U CN207330980 U CN 207330980U CN 201721287242 U CN201721287242 U CN 201721287242U CN 207330980 U CN207330980 U CN 207330980U
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- feedwater
- branch pipe
- recycling
- evaporated flue
- subfeeder
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Abstract
The utility model proposes a kind of feedwater recirculating system for acting on evaporated flue natural cycle system, including oxygen-eliminating device and feedwater recirculating line, feedwater recirculating line includes water main, subfeeder, feedwater recycling manifold, feedwater recycling branch pipe, subfeeder both ends are connected with oxygen-eliminating device outlet and water main respectively, feedwater recycling branch pipe both ends are connected with subfeeder and feedwater recycling manifold respectively, feedwater recycling manifold is connected with oxygen-eliminating device import, subfeeder is equipped with feed pump, feedwater recycling manifold is connected by loop branch pipe with evaporated flue Natural Circulation down-comer, loop branch pipe is equipped with first check-valve, shut-off valve is respectively equipped with the loop branch pipe of its both sides.The utility model will flow back to feed water and be sent into the circulation line of evaporated flue natural cycle system, and then improve evaporated flue circulating effect.
Description
Technical field
The utility model belongs to the technical field of pneumatic steelmaking evaporated cooling system Natural Circulation flue, more particularly to a kind of
Act on the feedwater recirculating system of evaporated flue natural cycle system.
Background technology
In converter vapourization cooling system, drum only can just produce saturated vapor in the oxygen blast phase, therefore only in oxygen blast
Phase needs a large amount of moisturizings, it is embodied in：The phase before and after oxygen blast, combustion intensity is relatively low in flue, drum evaporation capacity very little, vapour
Bag is without a large amount of moisturizings；The vigorous combustion in oxygen blast mid-term, flue, drum evaporation capacity is very big, and feed pump is usually with larger load
Run and supply water to drum；In the non-oxygen blast phase, drum need not supply water substantially.In the actual production process, feed pump is whole in converter
All it is continuous firing in a smelting cycle, its efficiency can relatively be given full play between oxygen blast mid-term by having only；Feed water in other periods
Pump does not supply water to drum or water supply is seldom, and most of supply water returns to oxygen-eliminating device by the recirculating line that feeds water, and gives at this time
Water pump, recirculating line, oxygen-eliminating device form the circulation loop of closure, and this hot water circuit in cycles is for Vaporizing cooling system
Unite indispensable, but a kind of behavior of waste of energy.
It is non-uniform that evaporated flue is heated in whole smelting cycle, its received heat is close with drum evaporation capacity, rate of water make-up
Cut relevant.For the evaporated flue of Natural Circulation, systemic circulation effect is got in theoretical scope of design inner flue heat intensity
Better.In the non-oxygen blast phase, flue received heat almost can be ignored, and water circulation almost stops.In oxygen blast early period or later stage,
Flue heat intensity is relatively small, and circulating effect is poor, the unfavorable phenomenon such as circulatory stasis and table easily occurs.Only exist
Oxygen blast mid-term, heat intensity is big, and circulating effect is good, and evaporation capacity is big, and drum rate of water make-up is also big.
The content of the invention
The technical problem to be solved by the utility model is to for above-mentioned problem, there is provided one kind acts on vaporization
The feedwater recirculating system of flue natural cycle system, by feedwater recirculating line access natural cycle system, is being followed naturally
Certain dynamic head is injected in loop back path, circulating effect of the converter vapourization cooling system in the oxygen blast forward and backward phase can be improved.
Technical solution is used by the utility model solves above-mentioned technical problem：One kind acts on evaporated flue and follows naturally
The feedwater recirculating system of loop system, including oxygen-eliminating device and feedwater recirculating line, feedwater recirculating line include water main,
Subfeeder, feedwater recycling manifold, feedwater recycling branch pipe, subfeeder both ends are exported respectively with oxygen-eliminating device and water main
It is connected, feedwater recycling branch pipe both ends are connected with subfeeder and feedwater recycling manifold respectively, feedwater recycling manifold
It is connected with oxygen-eliminating device import, subfeeder is equipped with feed pump, it is characterised in that feedwater recycling manifold passes through loop branch pipe
It is connected with evaporated flue Natural Circulation down-comer, the loop branch pipe is equipped with first check-valve, the first check-valve two
Shut-off valve is respectively equipped with the loop branch pipe of side.
By such scheme, the evaporated flue Natural Circulation down-comer is equipped with second check-valve.
By such scheme, the feedwater recycling manifold is equipped with regulating valve, and the water main is equipped with pressure sensing
Device.
The beneficial effects of the utility model are：A kind of feedwater recycling for acting on evaporated flue natural cycle system is provided
System, makes full use of the surplus capacity of feed pump, the recirculation conduit that feeds water is accessed to the down-comer of natural cycle system, in nature
Certain dynamic head is injected in circulation loop, circulating effect of the converter vapourization cooling system in the oxygen blast forward and backward phase can be improved, it is right
Run steadily in the long term in evaporated flue and the service life of flue has positive effect；Using Natural Circulation evaporated flue and its follow
Endless tube road, in pipeline construction, circulatory system flushing of pipeline is difficult to realize, by feedwater recirculation conduit access natural cycle system
Afterwards, circulatory system pipeline can repeatedly be rinsed by feed pump, is of great significance to improving pipeline construction quality.
Brief description of the drawings
Fig. 1 is the distribution schematic diagram of the utility model one embodiment.
Wherein：1. evaporated flue, 2. oxygen-eliminating devices, 3. water mains, 4. subfeeders, 5. feedwater recycling manifold, 6. give
Water recycling branch pipe, 7. feed pumps, 8. first check-valves, 9. second check-valves, 10. shut-off valves, 11. Natural Circulation down-comers,
12. loop branch pipe, 13. regulating valves, 14. pressure sensors.
Embodiment
To more fully understand the utility model, with reference to the accompanying drawings and examples the utility model is made further to retouch
State.
As shown in Figure 1, a kind of feedwater recirculating system for acting on evaporated flue natural cycle system, including oxygen-eliminating device 2
With feedwater recirculating line, feedwater recirculating line includes water main 3, subfeeder 4, feedwater recycling manifold 5, feedwater again
Loop branch pipe 6, subfeeder both ends are connected with oxygen-eliminating device outlet and water main respectively, feedwater recycling branch pipe both ends difference
It is connected with subfeeder and feedwater recycling manifold, feedwater recycling manifold is connected with oxygen-eliminating device import, on subfeeder
Equipped with feed pump 7, feedwater recycling manifold is connected by loop branch pipe 12 with 1 Natural Circulation down-comer 11 of evaporated flue, is followed
Ring branch pipe is equipped with first check-valve 8, shut-off valve 10 is respectively equipped with the loop branch pipe of first check-valve both sides, evaporated flue is certainly
So circulation down-comer is equipped with second check-valve 9.
Loop branch pipe all the way is picked out at oxygen-eliminating device in feedwater recycling manifold, the other end is connected to evaporated flue nature
Down-comer is circulated, shut-off valve, first check-valve, shut-off valve is set successively on loop branch pipe, second is set on Natural Circulation down-comer and is stopped
Valve is returned, after introducing loop branch pipe, the stop valve on feedwater recycling manifold is closed under normal production scenarios, recycling feedwater is straight
Tap into Natural Circulation down-comer, do not enter back into oxygen-eliminating device.
Feedwater recycling manifold is equipped with regulating valve 13, and water main is equipped with pressure sensor 14, regulating valve and pressure
Sensor is realized chain, and when being higher than setting value to hydraulic pressure, regulating valve automatically opens up certain aperture；When pressure is less than setting value,
Regulating valve is closed.
When feed pump just starts, feed water pump output flow very little, and feed pressure is very high, after water is higher than setting value,
Regulating valve automatically opens up certain aperture, avoids feed pump and is overheated under small flow or the abnormality of cavitation.At this time
The feedwater of reflux can enter Natural Circulation down-comer.
Under carburetion system normal operation, when converter is in oxygen blast mid-term, flue Natural Circulation effect is relatively
Good, drum rate of water make-up is larger, and feed water regurgitant volume seldom even zero in loop branch pipe；In the oxygen blast forward and backward phase, evaporated flue follows
Ring effect is poor, and drum rate of water make-up is relatively small, and the regurgitant volume that feeds water in loop branch pipe is relatively large, can be provided for recirculated water dynamic
Pressure head, promotes evaporated flue circulating effect to a certain degree；When converter is in the non-oxygen blast phase, drum is without moisturizing, and evaporated flue is certainly
So circulation is basic stagnates, and regulating valve automatically opens up certain aperture, and feed pump is operated on minimum discharge.
When pipe-line equipment breaks down on loop branch pipe, close dielectric valve and open first check-valve, recycling feedwater
It is reflowable to oxygen-eliminating device.
When loop branch pipe accesses Natural Circulation down-comer, it should be ensured that the flow direction of water is as far as possible consistent in two pipes, and second stops
Valve is returned to be used to prevent that recirculated water flows backward to drum in pipeline.
During evaporated flue Natural Circulation pipeline construction, loop branch pipe and feed pump can be utilized to rinse vaporization repeatedly
Flue and Natural Circulation pipeline, solve the problems, such as that Natural Circulation pipeline is difficult to rinse to a certain degree.
Claims (3)
1. a kind of feedwater recirculating system for acting on evaporated flue natural cycle system, including oxygen-eliminating device and feedwater recirculation pipe
Road, feedwater recirculating line include water main, subfeeder, feedwater recycling manifold, feedwater recycling branch pipe, subfeeder
Both ends are connected with oxygen-eliminating device outlet and water main respectively, feedwater recycling branch pipe both ends respectively with subfeeder and feedwater again
Circulation manifold is connected, and feedwater recycling manifold is connected with oxygen-eliminating device import, and subfeeder is equipped with feed pump, its feature exists
In feedwater recycling manifold is connected by loop branch pipe with evaporated flue Natural Circulation down-comer, is set on the loop branch pipe
There is first check-valve, shut-off valve is respectively equipped with the loop branch pipe of the first check-valve both sides.
2. a kind of feedwater recirculating system for acting on evaporated flue natural cycle system according to claim 1, it is special
Sign is that the evaporated flue Natural Circulation down-comer is equipped with second check-valve.
3. a kind of feedwater recirculating system for acting on evaporated flue natural cycle system according to claim 2, it is special
Sign is that the feedwater recycling manifold is equipped with regulating valve, and the water main is equipped with pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721287242.9U CN207330980U (en) | 2017-09-26 | 2017-09-26 | A kind of feedwater recirculating system for acting on evaporated flue natural cycle system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721287242.9U CN207330980U (en) | 2017-09-26 | 2017-09-26 | A kind of feedwater recirculating system for acting on evaporated flue natural cycle system |
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| Publication Number | Publication Date |
|---|---|
| CN207330980U true CN207330980U (en) | 2018-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721287242.9U Active CN207330980U (en) | 2017-09-26 | 2017-09-26 | A kind of feedwater recirculating system for acting on evaporated flue natural cycle system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307380A (en) * | 2019-07-16 | 2019-10-08 | 艾思瑞流体控制有限公司 | A method of extending regulating valve service life in water supply recycling |
-
2017
- 2017-09-26 CN CN201721287242.9U patent/CN207330980U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307380A (en) * | 2019-07-16 | 2019-10-08 | 艾思瑞流体控制有限公司 | A method of extending regulating valve service life in water supply recycling |
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