CN1566371A

CN1566371A - Converter steam dome high/low water level automatic feedwater unit

Info

Publication number: CN1566371A
Application number: CN 03137655
Authority: CN
Inventors: 史文锦
Original assignee: Shougang Corp
Current assignee: Shougang Group Co Ltd
Priority date: 2003-06-19
Filing date: 2003-06-19
Publication date: 2005-01-19
Anticipated expiration: 2023-06-19
Also published as: CN1295351C

Abstract

The invention discloses a converter steam dome high/low water level automatic feedwater unit, wherein two single impact water level adjustable valve are arranged on the backwater pipe of the revolving furnace evaporation cooling supply pipe interlocking with rise and fall of the oxygen guns.

Description

The high low-water level Automatic Water System of steel-making converter drum

Affiliated technical field:

The present invention relates to a kind of metallurgical UTILIZATION OF VESIDUAL HEAT IN automatic control device, particularly the high low-water level Automatic Water System of steel-making converter vaporization cooling drum.

Background technology

At present, known steel-smelting revolving furnace smoke canal vaporization cooling drum water supply modes has four kinds:

1, regularly feedwater

Drum is in the low-water level state before bessemerizing, and feeds water to drum by setting-up time in bessemerizing.

2, the spacing feedwater of single pulse

Drum is in the low-water level state before bessemerizing, and the feedwater restriction is no more than high-water in bessemerizing.

3, doublepulse self water feeding

When bessemerizing, supply water to drum according to vaporization cooling steam production and confluent adjusting feedwater valve aperture.

4, three momentum self water feedings

Increase the water level momentum and be three momentum self water feedings on doublepulse self water feeding basis, feedwater can make steam water-level maintain low-water level in the non-oxygen blast phase.

In China, general small vessel vaporization cooling timing feedwater and the spacing feedwater of single pulse are many, mammoth conveter flue vaporization cooling general employing doublepulse or three momentum water supply modes, and in the production practice, these four kinds of water supply modes all are feasible.But, these four kinds of water supply modes are the level of automation height no matter, the common problem that exists is: predetermined feedwater program, the The Water Level Control of Steam method can not all adapt with the every stove of steel-making converting process, and the automatic control precision reason that is difficult to guarantee, steam water-level changes with the actual converting process of converter misfits, nonsynchronous phenomenon happens occasionally, in order to keep the safety in production, steelworks generally all is aided with artificial supervision to converter flue vaporization cooling steam water-level to be regulated, so that correct inappropriate steam water-level at any time, this situation is incompatible safety in production and modern management requirement.

Summary of the invention

In order to overcome the deficiency of existing water supply modes, this invention technology provides a kind of and is interrupted the high low-water level Automatic Water System of drum that production actually operating operation matches with converter, this device can make drum remain correct water level bessemerizing whole process, need not to be aided with manual monitoring, and stop to take place mishandle, be particularly suitable for safety in production and modern management requirement.

This invention technology solves the technical scheme that its technical problem adopts: be provided with the return water pipe that is back to water tank on the drum water service pipe of converter flue evaporated cooling system, two single pulse level control valves are set on return water pipe, these two variable valve are interlocked with the converter oxygen gun rising and two positions that descend respectively, by the water level signal of drum equalizing reservoir carry out that drum is low, high-water regulates, the drum low-water level satisfies the required water yield of blowing one heat steel vaporization cooling; The drum high-water then is to drop to from the oxygen rifle to begin to steam, the water level that reaches after being risen by low-water level because of converter flue heat pipe inner volume expansion drum.Present technique setting drum low-water line and oxygen rifle interlocking, the oxygen rifle can not descend when steam water-level was lower than low-water line, and low-water level feedwater is at this moment regulated automatically and is worked to the drum moisturizing, oxygen rifle ability decline oxygen blast when steam water-level reaches low-water line; Set high-water be adjusted in automatically descend and delayed time five minutes after work, after steam water-level is lower than high-water line,, and make steam water-level during oxygen blast, maintain high-water line to the drum moisturizing always.Concrete feedwater function action is as follows:

The function title	Feedwater requires to possess simultaneously two conditions	Stop feedwater and possess a condition
The function title	Feedwater requires to possess simultaneously two conditions	Stop feedwater and possess a condition	The low-water level feedwater	1, oxygen rifle rising 2, water level are lower than low-water level (variable valve turns down)	1, the oxygen rifle descends, or 2, water level reaches low-water level (variable valve leaves greatly)
The high-water feedwater	1, oxygen rifle decline 2, water level are lower than high-water (variable valve turns down)	1, the oxygen rifle rises, or 2, water level reaches high-water (variable valve leaves greatly)	The low-water level feedwater

Ground adapts to the variation that converter is operated from motion tracking because two feed-regulating valves of the technical program can coincide very much, so drum is kept normal suitable water level all the time.

The beneficial effect of this invention technology is: realizing that mishandle does not take place no supervision, be converter steelmaking vaporization cooling safety technique device, and the principle system is simple, and investment for trnasforming urban land is few, penetration and promotion easily, and social benefit is good.

Description of drawings

Below in conjunction with the accompanying drawing examples of implementation this invention technology is further specified.

Fig. 1 is the high low-water level Automatic Water System of a steel-making converter drum synoptic diagram involved in the present invention.

1. low-water level variable valve; 2. high-water variable valve; 3. deoxygenation water tank; 4. service pump; 5. water service pipe; 6. return water pipe; 7. vacuum breaker; 8. valve; 9. drum; 10. downtake; 11. converter flue; 12. upcast; 13. pressure regulator valve; 14. electric contact point fluviograph; 15. converter; 16. oxygen rifle;

H1, H2 are that oxygen rifle 16 rises and decline state height among the figure, and H3, H4 are drum high-water and low-water level height, and V1 is a drum stagnant water layer, and V2 is the drum vapour space, and V3 is the effective water capacity of drum, and V4 is the moving space of steam water-level.

Embodiment

From accompanying drawing 1 as can be known: the Automatic Water System that low-water level variable valve 1 and high-water variable valve 2 and valve 8 are formed also is connected on the return water pipe 6, oxygen rifle 16 is in propradation H1 place before converter 15 blowing, soft water in the deoxygenation water tank 3 is through service pump 4, water service pipe 5, vacuum breaker 7, valve 8 enters drum, deliver to the water-inlet header of converter flue 11 belows then with downtake 10, converter flue 11 is got back in the drum 9 by thermogenetic mixture in converter 15 blowing along upcast 12, when drum 9 reaches operating pressure, pressure regulator valve 13 is opened to sending vapour outside, and 14 water level signal with drum 9 of electric contact point fluviograph are sent to low-water level variable valve 1 continuously and high-water variable valve 2 carries out regulation of level.According to the interlock connection of setting, oxygen rifle 16 is in propradation H1 place before converter 15 blowing, at this moment low-water level self water feeding function works, when converter 15 water levels are lower than low-water line, low-water level variable valve 1 is tending towards turning down, the water yield that is back in the deoxygenation water tank 3 is reduced and increase confluent, make water level rise to the drum low-water line rapidly, thereby possessed the oxygen rifle 16 oxygen blown condition that descends to drum 9.At this moment the useful volume V3 of drum 9 satisfies the required water consumption of smelting one heat steel, and low-water level self water feeding function no longer plays a role, and stops feedwater.

Converter 15 is after oxygen rifle 16 decline H2 places blew five minutes, because converter flue 11 heat absorptions, the carburetion system volume of water expands and produces steam, and portion water is extruded by upcast 12 and rises in the drum 9, water level is fluctuateed, and water level rises to high-water line from gauging line.At this moment, by predefined restricted condition, the time-delay five-minute period arrives, and high-water enters working order to water function.

In converter 15 ensuing blowing, because drum 9 reaches rated operating pressure, pressure regulator valve 13 is water loss to sending vapour outside, steam water-level descends, when steam water-level was lower than high-water line, high-water variable valve 2 was tending towards turning down, and reduced and had increased confluent to drum 9 from the feedwater of water pump 4 because be back to the water yield the deoxygenation water tank 3, water level is risen rapidly and maintain high-water line, finish until blowing.

Converter 15 blowing end, oxygen rifle 16 rising H1 places, and the automatic regulatory function of high-water is no longer kept high-water, and drum 9 water levels drop to below the low-water line, enter low-water level self water feeding state again, for the one heat steel that blows is down prepared, circulation so repeatedly.

Claims

1, the high low-water level Automatic Water System of a kind of steel-making converter drum, it is characterized in that: in converter vapourization cooling system, by two single pulse variable valve (1), (2) and be connected on the return water pipe, interlocking, the low-water level and the high-water of oxygen blast phase in independent regulation control non-blowing process of converter separately rise and descend with oxygen rifle (16) respectively for described two single pulse level control valves (1), (2).

2, according to the high low-water level Automatic Water System of right 1 described steel-making converter drum, it is characterized in that: two single pulse variable valve can replace with magnetic valve.