CN110117685A - A kind of blast furnace sealing circulation - Google Patents
A kind of blast furnace sealing circulation Download PDFInfo
- Publication number
- CN110117685A CN110117685A CN201910491464.XA CN201910491464A CN110117685A CN 110117685 A CN110117685 A CN 110117685A CN 201910491464 A CN201910491464 A CN 201910491464A CN 110117685 A CN110117685 A CN 110117685A
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- Prior art keywords
- water
- blast furnace
- pipeline
- pressure
- water pump
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
Abstract
The invention discloses a kind of blast furnaces to seal circulation, including blast furnace, the water outlet of blast furnace is connected by the water inlet line of water return pipeline and water pump, the outlet conduit of water pump and the water inlet end of blast furnace connect, the first valve body switchable, that water pump is flowed into for controlling the blast furnace return water in water return pipeline is provided on water return pipeline, pressure stabilizing pipeline is provided between blast furnace and water pump, the caliber of pressure stabilizing pipeline is less than the caliber of water return pipeline, and the second switchable valve body is provided on pressure stabilizing pipeline.By the way that pressure stabilizing pipeline is additionally arranged, efficiently solve the problems, such as that blast furnace sealing circulation water injection pressure after water pump maintenance is unstable, instantaneous loss of pressure alarm, a large amount of moisturizings, extend the service life of associate member caused by preventing because of pressure transient, improve the stability of whole system operation.
Description
Technical field
The present invention relates to operation of blast furnace technical fields, seal circulation more specifically to a kind of blast furnace.
Background technique
Existing blast-furnace soft water system is Closed Cycle, and stablizing for system pressure is most important, if fluctuating larger or wink
Between decompression just will affect blast furnace steady production and cause a large amount of moisturizings, but daily water pump maintenance in, need a water pump every time
And exits and entrances valve end pipe road carry out emptying just can be carried out upkeep operation.After the completion of maintenance because of valve before and after pressure difference it is larger, shape
At negative pressure, need biggish torque that can just valve plate be made to open, this has resulted in valve plate after opening certain aperture
It can just work, cause valve plate moment aperture larger, soft water directly pours into water pump, pipeline after the completion of maintenance in system,
Instantaneous loss of pressure alarm, a large amount of moisturizings are caused, while also causing certain impact to damage appurtenances, shortens service life, is influenced
The safe and stable operation of blast furnace.
In conclusion water injection pressure is unstable after how solving the problems, such as the maintenance of sealing and circulating water system water pump, it is current
Those skilled in the art's urgent problem to be solved.
Summary of the invention
In view of this, the object of the present invention is to provide the stable blast furnaces of water injection pressure after a kind of maintenance of water pump to seal recirculated water
System.
To achieve the goals above, the invention provides the following technical scheme:
A kind of blast furnace seals circulation, including blast furnace, and the water outlet of the blast furnace passes through water return pipeline and water pump
Water inlet line connection, the outlet conduit of the water pump are connect with the water inlet end of the blast furnace, and being provided on the water return pipeline can
Switch, the blast furnace return water for controlling in the water return pipeline flow into the first valve body of the water pump, the blast furnace with it is described
Pressure stabilizing pipeline is provided between water pump, the caliber of the pressure stabilizing pipeline is less than the caliber of the water return pipeline, and the voltage-stabiliser tube
The second switchable valve body is provided on road.
Preferably, the quantity of second valve body is two, and two second valve bodies are respectively arranged at the voltage-stabiliser tube
The water inlet end in road and water outlet.
Preferably, it is provided on the water inlet line of the water pump for detecting the pressure in the water inlet line and showing pressure
The pressure gauge of force value.
Preferably, the exhaust valve for exhaust is provided on the water pump.
Preferably, second valve body is ball valve.
Preferably, first valve body is electric butterfly valve.
Preferably, switchable water for controlling in the outlet conduit is provided on the outlet conduit of the water pump
Body flows into the third valve body of the blast furnace.
Preferably, the pressure stabilizing pipeline, the water return pipeline are stainless steel tube body.
Blast furnace provided by the invention seals circulation, including blast furnace, and the water outlet of blast furnace passes through water return pipeline and water
The water inlet line of pump connects, and the outlet conduit of water pump and the water inlet end of blast furnace connect, and switchable, use is provided on water return pipeline
The first valve body of water pump is flowed into the blast furnace return water in control water return pipeline, pressure stabilizing pipeline is provided between blast furnace and water pump, surely
The caliber of pressure pipeline is less than the caliber of water return pipeline, and the second switchable valve body is provided on pressure stabilizing pipeline.
Wherein, after the completion of maintenance, user first opens the second valve body, since the caliber of pressure stabilizing pipeline is less than water return pipeline
Caliber, pressure stabilizing pipeline circling water flow rate are less than circling water flow rate when water return pipeline is opened, the effect of return water suffered by the second valve body
Power is smaller compared to the first valve body, and user is easier to control the aperture of the second valve body, and moment aperture is smaller, thus, return water can be steady
Fixed slowly to flow into water pump, gradually the pressure between heeling pump and pressure stabilizing pipeline then closes the second valve after pressure balance
Body opens the first valve body, provides the water supply of big flow by water return pipeline for water pump, to complete blast furnace water supply, by additionally setting
Pressure stabilizing pipeline is set, efficiently solves the problems, such as that blast furnace sealing circulation water injection pressure after water pump maintenance is unstable, prevents
Because of instantaneous loss of pressure alarm, a large amount of moisturizings caused by pressure transient, the service life of associate member is extended, improves whole system operation
Stability.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram that blast furnace provided by the present invention seals circulation.
In Fig. 1:
1 it is blast furnace, 2 be the second valve body, 3 be pressure stabilizing pipeline, 4 be water return pipeline, 5 be the first valve body, 6 is water inlet line, 7
It is water pump for pressure gauge, 8,9 be exhaust valve, 10 be outlet conduit, 11 is third valve body.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Core of the invention is to provide the stable blast furnace sealing circulation of water injection pressure after a kind of maintenance of water pump.
Referring to FIG. 1, Fig. 1 is the structural schematic diagram that blast furnace provided by the present invention seals circulation.
Blast furnace provided by the present invention seals circulation, including blast furnace 1, and the water outlet of blast furnace 1 passes through water return pipeline 4
It is connect with the water inlet line 6 of water pump 8, the outlet conduit 10 of water pump 8 is connect with the water inlet end of blast furnace 1, is provided on water return pipeline 4
First valve body 5 switchable, for controlling the inflow water pump 8 of the blast furnace return water in water return pipeline 4, sets between blast furnace 1 and water pump 8
It is equipped with pressure stabilizing pipeline 3, the caliber of pressure stabilizing pipeline 3 is less than the caliber of water return pipeline 4, and is provided on pressure stabilizing pipeline 3 switchable
Second valve body 2.
Wherein, blast furnace sealing circulation is a completely enclosed system, generallys use soft water (low-pressure boiler soft water
) it is used as cooling medium, 50~60 DEG C of operating temperature (40~45 DEG C of practical experience) is driven by water pump 8 and is recycled, with cooling
The heat brought out in equipment is distributed through over-heat-exchanger in atmosphere.Expansion drum is equipped in system, it is therefore intended that absorb water close
Close in system since temperature raises caused by expansion.System working pressure is controlled by the N2 pressure in expansion drum, so that cooling
Medium has biggish temperature and controls vaporization of the water in cooling equipment.
In blast furnace sealing circulation, water pump 8 is the machinery for conveying soft water or being pressurized soft water, it is by prime mover
Mechanical energy or other external energies send soft water to, increase soft water energy, can be divided into volumetric water according to different working principles
The types such as pump, vane pump.Positive displacement pump is to transmit energy using the variation of its swept volume of a single chamber；Vane pump is to utilize rotary vane
Energy is transmitted in interaction with water, there is a types such as centrifugal pump, axial-flow pump and mixed-flow pump, user can according to actual needs into
Row selection, in the maintenance of daily water pump 8, needing a water pump 8 to carry out emptying every time just can be carried out upkeep operation, after the completion of maintenance
Because the pipeline enclosure pressure difference before and after each valve body is larger, negative pressure is formed.
After the completion of maintenance, user needs first to open the second valve body 2, since the caliber of pressure stabilizing pipeline 3 is less than water return pipeline 4
Caliber, it is preferred that 1/10th of water return pipeline 4 can be set by the caliber of pressure stabilizing pipeline 3, with reduce open the second valve
Active force needed for body 2, certainly, the caliber of pressure stabilizing pipeline 3 and the pipe diameter size of water return pipeline 4 are simultaneously not particularly limited, Yong Huke
To be selected according to the actual situation, the circling water flow rate of pressure stabilizing pipeline 3 is less than circling water flow rate when water return pipeline 4 is opened, and second
The active force of return water suffered by valve body 2 is smaller compared to the first valve body 5, and user is easier to control the aperture of the second valve body 2, moment
Aperture is smaller, thus, return water, which can be stablized, slowly flows into water pump 8, gradually the pressure between heeling pump 8 and pressure stabilizing pipeline 3,
After pressure balance, then the second valve body 2 is closed, open the first valve body 5, is that water pump 8 provides big flow by water return pipeline 4
It supplies water, to complete the water supply of blast furnace 1, by the way that pressure stabilizing pipeline 3 is additionally arranged, efficiently solves blast furnace sealing circulation in water pump
The unstable problem of water injection pressure after 8 maintenance, instantaneous loss of pressure alarm, a large amount of moisturizings, extend caused by preventing because of pressure transient
The service life of associate member improves the stability of whole system operation.
The second valve body 2 is opened in order to facilitate user, the second valve body 2 is avoided to break down, in this embodiment, the
The quantity of two valve bodies 2 is two, and two the second valve bodies 2 are respectively arranged at water inlet end and the water outlet of pressure stabilizing pipeline 3.
It is understood that two the second valve bodies 2 of setting, can be improved the safety of blast furnace sealing circulation, keep away
Exempt from not stopping or pass through return water, influence the normal of blast furnace sealing circulation after a certain second valve body 2 goes wrong
Work, and since two the second valve bodies 2 are respectively arranged at water inlet end and the water outlet of pressure stabilizing pipeline 3, facilitate user in difference
Position be turned on or off the second valve body 2, certainly, the quantity of the second valve body 2 and setting position are not limited to above-mentioned side
Formula, user can also select according to the actual situation.
In a kind of specific implementation formula mode about the second valve body 2, the second valve body 2 is ball valve.
Wherein, ball valve is a kind of valve that opening and closing element (sphere) is driven by valve rod, and rotated around ball valve axis.It is main
It is used for the adjusting and control of fluid, fluid resistance to be small, and ball valve, which is mainly used to make in pipeline, cuts off, distributes and change medium
Flow direction, easy to operate, rapidly, it only needs to be closed sternly with the rotating torque of the operation and very little that are rotated by 90 ° for opening and closing
Close, user-friendly, the advantages of partition return water facilitates rapidly, and ball valve optimum switchs, stop valve uses, ball valve, is as follows,
Valve stem seal is reliable, and since valve rod only rotates without moving up and down, the packing seal of valve rod is survivable, and seals
Ability increases with increasing for pressure medium；Fluid resistance is small, and the ball valve of full-bore is substantially without flow resistance；Structure is simple, body
Product is small, light-weight；It is close reliable.There are two sealing surfaces for it, and various plastics are widely used in the seal face materials of ball valve, sealing
Property is good, is able to achieve and is fully sealed.
And the first valve body 5 is since the caliber of water return pipeline 4 is larger, it is larger that the second valve body 2 opens required external force, manually opens
It closes more difficult, it is preferred that the first valve body 5 is electric butterfly valve.Electric butterfly valve belongs to one in electrically operated valve and electric control valve
Kind.Electric butterfly valve controls the switch of butterfly valve by power supply signal.And electric butterfly valve is attached to manual overvide, once occur
Power failure can be unlikely to influence to use temporarily with manual operation.Common electric butterfly valve has wafer type electric butterfly valve and method
Two kinds of blue formula electric butterfly valve.Wafer type electric butterfly valve is that valve is connected between two pipe flanges with stud, flange form
Electric butterfly valve is on valve with flange, with bolt by both ends flanged joint on valve on pipe flange.It is electronic using which kind of
Butterfly valve needs to be selected according to 4 structure species of water return pipeline used by a user, and certainly, the first valve body 5 is specific with the second valve body 2
Type is not limited to the above-mentioned type, as long as the valve that can control reflux circulation can be applied to technology provided by the present invention
In scheme.
On the basis of above-mentioned specific embodiment, it is provided on the water inlet line 6 of water pump 8 for detecting water inlet line 6
Interior pressure and the pressure gauge 7 for showing pressure value.
Wherein, the general stationary value of pressure of return water in water return pipeline 4, it is preferred that in real work, water return pipeline 4
Interior standard pressure of return water is 0.5MPa, when user, which opens the second valve body 2, gradually to be supplied water by water inlet line 6 for water pump 8, by
Water in water inlet line 6 increases, and the pressure value registration of pressure gauge 7 is gradually increased simultaneously, when the pressure value of pressure gauge 7 reaches
When 0.5MPa, that is, the pressure and water return pipeline 4 represented in water pump 8 balances, and can close the second valve body 2, and open the first valve body
5, it is water pump 8 and the quick water delivery of blast furnace 1, certainly, the standard pressure of return water in water return pipeline 4 needs to calculate according to the actual situation
It obtains, it is not limited to above-mentioned numerical value.
In order to guarantee the working efficiency of water pump 8, in this embodiment, the row for exhaust is provided on water pump 8
Air valve 9.
Wherein, exhaust valve 9 is essential auxiliary element in pipe-line system, is widely used in boiler, air-conditioning, petroleum day
In right gas, water supply and sewerage pipeline.It is often mounted on commanding elevation or elbow etc., excessive gas, raising pipeline road make in purging line
With efficiency and reduce energy consumption.Under normal circumstances, the dissolved air in water containing about 2VOL%, during water delivery, these air
By constantly being released in water, it is gathered at the high point of pipeline, forming air bag becomes difficult water delivery, the water delivery energy of system
Therefore power can decline about 5-15%, this 9 major function of exhaust valve is exactly the dissolved air for excluding this 2VOL%.
In order to control the water outlet of water pump 8, in this embodiment, being provided on the outlet conduit 10 of water pump 8 can be opened
Third valve body 11 close, that blast furnace 1 is flowed into for controlling the water body in outlet conduit 10.
It should be noted that the water body after the pressurization of water pump 8 flows into blast furnace 1, blast furnace 1 is cooled down, by blast furnace 1
Return water flows back to water, such cycle operation again by water return pipeline 4.
In order to guarantee the service life of pressure stabilizing pipeline 3, water return pipeline 4, in this embodiment, pressure stabilizing pipeline 3 is returned
Waterpipe 4 is stainless steel tube body.
It is understood that moist in pressure stabilizing pipeline 3, water return pipeline 4, appearance is easily corroded and rusted, thus, using stainless steel
Tube body can effectively avoid corrosion and damage, it is of course also possible to use the tube body of other materials, such as plastic tube, cost is relatively
It is low.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Blast furnace provided by the present invention sealing circulation is described in detail above.It is used herein specifically
Principle and implementation of the present invention are described for a example, the present invention that the above embodiments are only used to help understand
Method and its core concept.It should be pointed out that for those skilled in the art, not departing from original of the invention
, can be with several improvements and modifications are made to the present invention under the premise of reason, these improvement and modification also fall into right of the present invention and want
In the protection scope asked.
Claims (8)
1. a kind of blast furnace seals circulation, which is characterized in that including blast furnace (1), the water outlet of the blast furnace (1) passes through back
Waterpipe (4) is connect with the water inlet line (6) of water pump (8), outlet conduit (10) and the blast furnace (1) of the water pump (8)
Water inlet end connection, be provided on the water return pipeline (4) it is switchable, returned for controlling the blast furnace in the water return pipeline (4)
Water flows into the first valve body (5) of the water pump (8), and pressure stabilizing pipeline (3) are provided between the blast furnace (1) and the water pump (8),
The caliber of the pressure stabilizing pipeline (3) is less than the caliber of the water return pipeline (4), and is provided with and can open on the pressure stabilizing pipeline (3)
The second valve body (2) closed.
2. blast furnace according to claim 1 seals circulation, which is characterized in that the quantity of second valve body (2)
It is two, two second valve bodies (2) are respectively arranged at water inlet end and the water outlet of the pressure stabilizing pipeline (3).
3. blast furnace according to claim 1 seals circulation, which is characterized in that the water inlet line of the water pump (8)
(6) it is provided on for detecting the pressure in the water inlet line (6) and showing the pressure gauge (7) of pressure value.
4. blast furnace according to claim 3 seals circulation, which is characterized in that be arranged on the water pump (8) useful
In the exhaust valve (9) of exhaust.
5. blast furnace according to claim 4 seals circulation, which is characterized in that second valve body (2) is ball valve.
6. blast furnace according to claim 5 seals circulation, which is characterized in that first valve body (5) is electronic
Butterfly valve.
7. blast furnace according to any one of claims 1 to 6 seals circulation, which is characterized in that the water pump (8)
Be provided on outlet conduit (10) it is switchable, flow into the blast furnace for controlling the water body in the outlet conduit (10)
Three valve bodies (11).
8. blast furnace according to claim 7 seals circulation, which is characterized in that the pressure stabilizing pipeline (3), described time
Waterpipe (4) is stainless steel tube body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910491464.XA CN110117685A (en) | 2019-06-06 | 2019-06-06 | A kind of blast furnace sealing circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910491464.XA CN110117685A (en) | 2019-06-06 | 2019-06-06 | A kind of blast furnace sealing circulation |
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| Publication Number | Publication Date |
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| CN110117685A true CN110117685A (en) | 2019-08-13 |
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ID=67523854
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910491464.XA Pending CN110117685A (en) | 2019-06-06 | 2019-06-06 | A kind of blast furnace sealing circulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115232897A (en) * | 2022-06-28 | 2022-10-25 | 武汉钢铁有限公司 | Method for regulating water quantity of blast furnace soft water closed circulation cooling system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101021197A (en) * | 2006-11-22 | 2007-08-22 | 王岗 | Blast furnace cooling water backwater top pressure power generation |
| CN210134131U (en) * | 2019-06-06 | 2020-03-10 | 山东钢铁股份有限公司 | Blast furnace sealing circulating water system |
-
2019
- 2019-06-06 CN CN201910491464.XA patent/CN110117685A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101021197A (en) * | 2006-11-22 | 2007-08-22 | 王岗 | Blast furnace cooling water backwater top pressure power generation |
| CN210134131U (en) * | 2019-06-06 | 2020-03-10 | 山东钢铁股份有限公司 | Blast furnace sealing circulating water system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115232897A (en) * | 2022-06-28 | 2022-10-25 | 武汉钢铁有限公司 | Method for regulating water quantity of blast furnace soft water closed circulation cooling system |
| CN115232897B (en) * | 2022-06-28 | 2023-05-23 | 武汉钢铁有限公司 | Method for adjusting water quantity of blast furnace soft water closed circulation cooling system |
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