CN210134131U - Blast furnace sealing circulating water system - Google Patents
Blast furnace sealing circulating water system Download PDFInfo
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- CN210134131U CN210134131U CN201920866480.8U CN201920866480U CN210134131U CN 210134131 U CN210134131 U CN 210134131U CN 201920866480 U CN201920866480 U CN 201920866480U CN 210134131 U CN210134131 U CN 210134131U
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Abstract
The utility model discloses a blast furnace sealing circulating water system, including the blast furnace, the outlet end of blast furnace passes through the inlet channel of return water pipe and water pump and is connected, and the outlet conduit of water pump is connected with the inlet end of blast furnace, is provided with the switch on the return water pipe, is used for controlling the first valve body of blast furnace return water inflow water pump in the return water pipe, is provided with the steady voltage pipeline between blast furnace and the water pump, and the pipe diameter of steady voltage pipeline is less than the pipe diameter of return water pipe, and is provided with the second valve body of switch on the steady voltage pipeline. Through additionally setting up steady voltage pipeline, effectively solved the unstable problem of water injection pressure of the sealed circulating water system of blast furnace after the water pump overhauls, stopped to cause in the twinkling of an eye decompression because of pressure instability and reported to the police, a large amount of moisturizing, prolonged the life of attached, improve the stability of entire system operation.
Description
Technical Field
The utility model relates to a blast furnace operation technical field, more specifically say, relate to a blast furnace seal circulation water system.
Background
The existing blast furnace soft water system is closed circulation, the stability of the system pressure is very important, if the fluctuation is large or the instantaneous pressure loss can influence the stable production of the blast furnace and cause a large amount of water supplement, but in the daily water pump maintenance, the water pump and the inlet and outlet valve end pipeline are required to be emptied at every time to carry out maintenance operation. The valve plate is opened only by large torque, so that the valve plate can play a role after being opened with a certain opening degree, the instantaneous opening degree of the valve plate is large, soft water in the system is directly poured into a water pump and a pipeline after the maintenance is finished, instantaneous decompression alarm and a large amount of water supplement are caused, certain impact damage is caused to accessory parts simultaneously, the service cycle is shortened, and the safe and stable operation of the blast furnace is influenced.
In conclusion, how to solve the problem of unstable water injection pressure after the water pump of the closed circulating water system is overhauled is a problem to be urgently solved by technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a stable blast furnace seal circulating water system of water injection pressure after the water pump overhauls.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a blast furnace seal circulation water system, includes the blast furnace, the outlet end of blast furnace passes through the inlet channel of return water pipe and water pump and is connected, the outlet conduit of water pump with the inlet end of blast furnace is connected, but be provided with on the return water pipe, be used for control blast furnace return water in the return water pipe flows in the first valve body of water pump, the blast furnace with be provided with the steady voltage pipeline between the water pump, the pipe diameter of steady voltage pipeline is less than the pipe diameter of return water pipe, just be provided with the second valve body of switch on the steady voltage pipeline.
Preferably, the number of the second valve bodies is two, and the two second valve bodies are respectively arranged at the water inlet end and the water outlet end of the pressure stabilizing pipeline.
Preferably, a pressure gauge for detecting the pressure in the water inlet pipeline and displaying the pressure value is arranged on the water inlet pipeline of the water pump.
Preferably, the water pump is provided with an exhaust valve for exhausting.
Preferably, the second valve body is a ball valve.
Preferably, the first valve body is an electric butterfly valve.
Preferably, a water outlet pipeline of the water pump is provided with a third valve body which can be switched and is used for controlling the water body in the water outlet pipeline to flow into the blast furnace.
Preferably, the pressure stabilizing pipeline and the water return pipeline are both stainless steel pipe bodies.
The utility model provides a circulating water system is sealed to blast furnace, including the blast furnace, the outlet end of blast furnace passes through the inlet channel of return water pipe and water pump and is connected, and the outlet conduit of water pump is connected with the inlet end of blast furnace, is provided with the switch on the return water pipe, is used for controlling the first valve body of blast furnace return water inflow water pump in the return water pipe, is provided with the steady voltage pipeline between blast furnace and the water pump, and the pipe diameter of steady voltage pipeline is less than the pipe diameter of return water pipe, and is provided with the second valve body of switch on the steady voltage pipeline.
After the maintenance is finished, a user firstly opens the second valve body, the pipe diameter of the pressure stabilizing pipeline is smaller than the pipe diameter of the water return pipeline, the return water flow of the pressure stabilizing pipeline is smaller than the return water flow when the water return pipeline is opened, the acting force of the return water received by the second valve body is smaller than that of the first valve body, the opening degree of the second valve body is easier to control by the user, and the instantaneous opening degree is smaller, so that the return water can stably and slowly flow into the water pump to gradually balance the pressure between the water pump and the pressure stabilizing pipeline, after the pressure is balanced, the second valve body is closed, the first valve body is opened, large-flow water supply is provided for the water pump through the water return pipeline to finish the water supply of the blast furnace, the problem that the water injection pressure of the sealed circulating water system of the blast furnace is unstable after the water pump maintenance is solved effectively by additionally arranging the pressure stabilizing pipeline, the stability of the whole system operation is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a blast furnace sealing circulating water system provided by the utility model.
In fig. 1:
1 is a blast furnace, 2 is a second valve body, 3 is a pressure stabilizing pipeline, 4 is a water return pipeline, 5 is a first valve body, 6 is a water inlet pipeline, 7 is a pressure gauge, 8 is a water pump, 9 is an exhaust valve, 10 is a water outlet pipeline, and 11 is a third valve body.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide a stable water injection pressure's sealed circulating water system of blast furnace after the water pump overhauls.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a blast furnace sealing circulating water system provided by the present invention.
The utility model provides a circulating water system is sealed to blast furnace, including blast furnace 1, the outlet end of blast furnace 1 passes through return water pipe 4 and is connected with inlet channel 6 of water pump 8, outlet conduit 10 of water pump 8 is connected with the inlet end of blast furnace 1, be provided with the switch on return water pipe 4, a first valve body 5 for controlling blast furnace return water inflow water pump 8 in return water pipe 4, be provided with between blast furnace 1 and the water pump 8 steady voltage pipeline 3, the pipe diameter of steady voltage pipeline 3 is less than return water pipe 4's pipe diameter, and be provided with the second valve body 2 of switch on the steady voltage pipeline 3.
Wherein, blast furnace seal circulating water system is a totally enclosed system, adopts soft water (can only low pressure boiler soft water) as coolant usually, and its operating temperature 50 ~ 60 ℃ (practice experience 40 ~ 45 ℃) is driven by water pump 8 and is circulated to the heat that brings out in the cooling arrangement gives off in the atmosphere through heat exchanger. An expansion tank is provided in the system in order to absorb the expansion of the water in the closed system due to the temperature increase. The system operating pressure is controlled by the N2 pressure in the expansion tank so that the cooling medium has a greater heat to control the evaporation of water in the cooling device.
In a blast furnace sealed circulating water system, a water pump 8 is a machine for delivering or pressurizing soft water, and transfers mechanical energy of a prime mover or other external energy to the soft water to increase the energy of the soft water, and can be divided into a volumetric water pump, a vane pump and the like according to different working principles. The displacement pump transfers energy by utilizing the change of the volume of a working chamber; the vane pump utilizes the interaction of rotary vane and water to transmit energy, has types such as centrifugal pump, axial-flow pump and mixed flow pump, and the user can select according to actual need, overhauls at daily water pump 8 and overhauls, all need to empty water pump 8 at every turn and just can overhaul the operation, and is great because of the pressure differential between the pipeline around each valve body after overhauing the completion, forms the negative pressure.
After the overhaul is finished, a user needs to open the second valve body 2 first, because the pipe diameter of the pressure stabilizing pipeline 3 is smaller than that of the water return pipeline 4, preferably, the pipe diameter of the pressure stabilizing pipeline 3 can be set to be one tenth of that of the water return pipeline 4 to reduce the acting force required for opening the second valve body 2, of course, the pipe diameter of the pressure stabilizing pipeline 3 and the pipe diameter of the water return pipeline 4 are not specially limited, the user can select according to actual conditions, the return water flow of the pressure stabilizing pipeline 3 is smaller than that of the water return pipeline 4 when the water return pipeline is opened, the acting force of the return water received by the second valve body 2 is smaller than that of the first valve body 5, the opening degree of the second valve body 2 is easier to control by the user, the instantaneous opening degree is smaller, therefore, the return water can stably and slowly flow into the water pump 8 to gradually balance the pressure between the water pump 8, open first valve body 5, provide large-traffic water supply for water pump 8 through return water pipe 4 to accomplish 1 water supplies of blast furnace, through additionally setting up steady voltage pipeline 3, effectively solved the unstable problem of water injection pressure of the sealed circulating water system of blast furnace after water pump 8 overhauls, stop to cause the decompression in the twinkling of an eye to report to the police, a large amount of moisturizing because of pressure instability, prolonged the life of attached, improve the stability of entire system operation.
In order to facilitate the user to open the second valve body 2 and avoid the second valve body 2 from malfunctioning, in the present embodiment, the number of the second valve bodies 2 is two, and the two second valve bodies 2 are respectively disposed at the water inlet end and the water outlet end of the pressure stabilizing pipeline 3.
It can be understood that, two second valve bodies 2 are arranged, the safety of the blast furnace sealed circulating water system can be improved, after a problem of one second valve body 2 is avoided, the return water cannot be blocked or can pass through, and the normal work of the blast furnace sealed circulating water system is influenced, and because the two second valve bodies 2 are respectively arranged at the water inlet end and the water outlet end of the pressure stabilizing pipeline 3, a user can conveniently open or close the second valve bodies 2 at different positions, of course, the number and the arrangement positions of the second valve bodies 2 are not limited to the above mode, and the user can select according to the actual situation.
In one embodiment of the second valve body 2, the second valve body 2 is a ball valve.
The ball valve is a valve in which an opening and closing part (a ball body) is driven by a valve rod and rotates around the axis of the ball valve. The ball valve is mainly used for adjusting and controlling fluid, the fluid resistance is small, the ball valve is mainly used for cutting off, distributing and changing the flow direction of a medium in a pipeline, the operation is convenient, the opening and closing are rapid, the ball valve can be closed tightly only by rotating 90 degrees and a small rotating moment, the operation of a user is convenient, the backwater cutting off is rapid and convenient, and the ball valve is most suitable for being used as a switch and a cut-off valve; the fluid resistance is small, and the ball valve with the full drift diameter basically has no flow resistance; the structure is simple, the volume is small, and the weight is light; is compact and reliable. The ball valve has two sealing surfaces, and the sealing surface material of the ball valve is widely made of various plastics, so that the sealing performance is good, and the complete sealing can be realized.
And first valve body 5 is great because the pipe diameter of return water pipe 4 is great, and the required external force is great for second valve body 2 to open, and manual switch is more difficult, and is preferred, and first valve body 5 is electric butterfly valve. The electric butterfly valve belongs to one of electric valve and electric control valve. The electric butterfly valve controls the opening and closing of the butterfly valve through a power signal. And the electric butterfly valve is provided with a manual control device, so that once a power failure occurs, the electric butterfly valve can be temporarily operated manually, and the use is not influenced. The commonly used electric butterfly valve comprises a wafer type electric butterfly valve and a flange type electric butterfly valve. The flange type electric butterfly valve is characterized in that a valve is connected between two pipeline flanges through a stud bolt, flanges are arranged on the valve, and flanges at two ends of the valve are connected to the pipeline flanges through bolts. Adopt which kind of electric butterfly valve need select according to the 4 structure types of return water pipes that the user used, of course, the specific type of first valve body 5 and second valve body 2 is not limited to above-mentioned type, as long as can control the valve homoenergetic that flows back and all can be applied to the utility model provides an among the technical scheme.
On the basis of the above specific embodiment, the water inlet pipe 6 of the water pump 8 is provided with a pressure gauge 7 for detecting the pressure in the water inlet pipe 6 and displaying the pressure value.
Wherein, the return water pressure in the return water pipe 4 is generally a stable value, preferably, in actual work, the standard return water pressure in the return water pipe 4 is 0.5MPa, when the user opens the second valve body 2 to supply water gradually for the water pump 8 through the water inlet pipe 6, because the water yield in the water inlet pipe 6 increases, the pressure value reading of the pressure gauge 7 increases gradually at the same time, when the pressure value of the pressure gauge 7 reaches 0.5MPa, it means that the pressure in the water pump 8 is balanced with the return water pipe 4, the second valve body 2 can be closed, and the first valve body 5 is opened to rapidly convey water for the water pump 8 and the blast furnace 1, of course, the standard return water pressure in the return water pipe 4 needs to be calculated according to actual conditions, and is not limited to the above-mentioned values.
In order to ensure the working efficiency of the water pump 8, in the present embodiment, the water pump 8 is provided with an exhaust valve 9 for exhausting air.
The exhaust valve 9 is an essential auxiliary element in a pipeline system, and is widely applied to boilers, air conditioners, petroleum and natural gas pipelines and water supply and drainage pipelines. The gas-liquid separator is often arranged at a height-making point or an elbow and the like, so that redundant gas in a pipeline is discharged, the use efficiency of the pipeline is improved, and the energy consumption is reduced. In general, the water contains about 2 VOL% of dissolved air, which is released from the water continuously during the water delivery process and accumulates at the high points of the pipeline, forming air pockets that make the water delivery difficult, and the water delivery capacity of the system can therefore decrease by about 5-15%, and the main function of the air release valve 9 is to remove this 2 VOL% of dissolved air.
In order to control the water outlet of the water pump 8, in the present embodiment, the water outlet pipe 10 of the water pump 8 is provided with a switchable third valve 11 for controlling the water in the water outlet pipe 10 to flow into the blast furnace 1.
It should be noted that the water body pressurized by the water pump 8 flows into the blast furnace 1 to cool the blast furnace 1, and the return water passing through the blast furnace 1 flows back through the return water pipe 4 again, and the operation is circulated.
In order to guarantee the service life of the pressure stabilizing pipeline 3 and the water return pipeline 4, in the specific embodiment, the pressure stabilizing pipeline 3 and the water return pipeline 4 are stainless steel pipe bodies.
It can be understood that the pressure stabilizing pipeline 3 and the water return pipeline 4 are wet and easy to corrode and rust, so that the stainless steel pipe body is adopted, corrosion damage can be effectively avoided, and the pipe body made of other materials, such as a plastic pipe, can be adopted, and the cost is relatively low.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above detailed description is made on the blast furnace sealing circulating water system provided by the utility model. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (8)
1. The utility model provides a blast furnace seals circulating water system, its characterized in that, includes blast furnace (1), the outlet end of blast furnace (1) passes through return water pipe (4) and is connected with inlet channel (6) of water pump (8), outlet conduit (10) of water pump (8) with the inlet end of blast furnace (1) is connected, but be provided with switch on return water pipe (4), be used for control blast furnace return water in return water pipe (4) flows into first valve body (5) of water pump (8), blast furnace (1) with be provided with between water pump (8) surge pipeline (3), the pipe diameter of surge pipeline (3) is less than the pipe diameter of return water pipe (4), just be provided with switch's second valve body (2) on surge pipeline (3).
2. The blast furnace sealing circulating water system as claimed in claim 1, wherein the number of the second valve bodies (2) is two, and the two second valve bodies (2) are respectively arranged at the water inlet end and the water outlet end of the pressure stabilizing pipeline (3).
3. The blast furnace sealing and circulating water system according to claim 1, wherein a pressure gauge (7) for detecting the pressure in the water inlet pipe (6) and displaying the pressure value is provided on the water inlet pipe (6) of the water pump (8).
4. A blast furnace sealing and circulating water system according to claim 3, wherein the water pump (8) is provided with an exhaust valve (9) for exhausting.
5. The blast furnace seal circulating water system according to claim 4, wherein the second valve body (2) is a ball valve.
6. The blast furnace seal circulation water system according to claim 5, wherein the first valve body (5) is an electric butterfly valve.
7. The blast furnace closed circulating water system according to any one of claims 1 to 6, wherein the water outlet pipe (10) of the water pump (8) is provided with a switchable third valve body (11) for controlling the flow of the water in the water outlet pipe (10) into the blast furnace.
8. The blast furnace sealing and circulating water system according to claim 7, wherein the pressure stabilizing pipe (3) and the water return pipe (4) are both stainless steel pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920866480.8U CN210134131U (en) | 2019-06-06 | 2019-06-06 | Blast furnace sealing circulating water system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920866480.8U CN210134131U (en) | 2019-06-06 | 2019-06-06 | Blast furnace sealing circulating water system |
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| CN210134131U true CN210134131U (en) | 2020-03-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110117685A (en) * | 2019-06-06 | 2019-08-13 | 山东钢铁股份有限公司 | A kind of blast furnace sealing circulation |
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2019
- 2019-06-06 CN CN201920866480.8U patent/CN210134131U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110117685A (en) * | 2019-06-06 | 2019-08-13 | 山东钢铁股份有限公司 | A kind of blast furnace sealing circulation |
| CN110117685B (en) * | 2019-06-06 | 2024-06-07 | 山东钢铁股份有限公司 | Blast furnace sealing circulating water system |
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