CN102021256A - Circulating cooling water system for blast furnace tuyere small sleeve - Google Patents
Circulating cooling water system for blast furnace tuyere small sleeve Download PDFInfo
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- 239000000498 cooling water Substances 0.000 title claims abstract description 119
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 241
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 13
- 238000007872 degassing Methods 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 239000007921 spray Substances 0.000 claims description 55
- 239000007788 liquid Substances 0.000 claims description 23
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- 238000011001 backwashing Methods 0.000 claims description 6
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 15
- 230000001502 supplementing effect Effects 0.000 abstract description 11
- 239000013589 supplement Substances 0.000 abstract description 4
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- 238000011105 stabilization Methods 0.000 abstract description 2
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- 238000004519 manufacturing process Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
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- 238000001914 filtration Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
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- 229910001873 dinitrogen Inorganic materials 0.000 description 1
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Abstract
The invention discloses a blast furnace tuyere small sleeve circulating cooling water system which is arranged between a water outlet port and a water inlet port of a water applying point of a blast furnace tuyere small sleeve, and at least comprises a closed circulating cooling water loop formed by sequentially connecting a degassing tank, an evaporative air cooler and a pressure water pump in series through a water pipe; a water leakage detection device is arranged on the water pipe respectively connected with the water inlet port and the water outlet port of the blast furnace tuyere small sleeve, and a pressure stabilizing and water supplementing device is arranged on a closed circulating cooling water loop between the evaporative air cooler and the pressure water pump; and a self-cleaning pipeline filter is arranged on the closed circulating cooling water loop between the evaporative air cooler and the pressurized water pump. The invention has the advantages of low power consumption, small water loss, better water quality, convenient leak detection, automatic pressure stabilization water supplement, convenient operation management and maintenance, and the like.
Description
Technical Field
The invention relates to a blast furnace circulating cooling water system, in particular to a high-efficiency and energy-saving blast furnace tuyere small sleeve circulating cooling water system. The system is particularly suitable for the characteristics of high water supply pressure of the blast furnace small sleeve, high requirement on the stability of a cooling water system, easy leakage of the cooling system and the like.
Background
In recent years, as the adverse effect of global warming on the natural environment is increasingly intensified, the environmental awareness of energy conservation, emission reduction and low-carbon economy of people is gradually strengthened. The steel industry is a water and energy consuming household, and along with the expansion of the scale of steel enterprises, the shortage of resource water and the enhancement of water saving consciousness, the energy-saving guiding direction of national policies, energy conservation and emission reduction become problems to be solved urgently by steel enterprises, and the high attention of various steel enterprises and design units is paid.
As is well known, a small set of circulating cooling water system of a blast furnace tuyere is an important guarantee for the normal operation of the blast furnace and is one of main energy consumption equipment in the operation of the blast furnace. The existing blast furnace tuyere small-sleeve circulating cooling water system is divided into an open-circuit circulating cooling water system and a closed-circuit circulating cooling water loop which is connected with circulating cooling water of a blast furnace body in series.
Firstly, the tuyere small-sleeve circulating cooling water system of most of domestic blast furnaces at present adopts an open-circuit circulating cooling water system, and the specific circulating cooling process is as follows: circulating water in the cold water pool is pressurized by a water pump, then enters a water return tank through high-temperature equipment, enters a hot water pool of a water pump room in a gravity flow mode, is lifted by the hot water pump and enters the cold water pool after being cooled by a cooling tower, and the circulating process is completed. However, the existing open-circuit circulating cooling water system has the following defects:
1. the water supply pump has large lift, large power and high power consumption;
2. the air blowing and evaporation losses in the cooling process are large, and the water replenishing quantity of a circulating water system is large;
3. the circulating cooling water is directly contacted with air, so that the water quality is poor, scaling is easy to occur, and the cooling effect is reduced;
4. when the leakage condition of the tuyere small sleeve cooling water is checked, a method of observing the water outlet state by naked eyes is adopted, the automation degree is low, and the production safety is reduced.
Secondly, a small number of closed circulation cooling water loops connected with the circulation cooling water of the blast furnace body in series are applied, and the specific circulation cooling process is as follows: the circulating cooling water is pressurized, cooled by a blast furnace small sleeve, mixed with the backwater of the blast furnace body, and distributed by a valve group, wherein one path of circulating water is cooled by an air cooler and then enters a water suction pipe of a pressure pump, and a circulation process is completed. However, the existing closed-cycle cooling water loop has the following defects:
1. the operation and management are inconvenient, the operation and management are limited by the blast furnace body, the independence of the system is poor, the normal operation of the system is influenced, and the long-time operation of the blast furnace cannot be ensured; when leakage occurs, the leakage reason is not easy to judge, so that the system is difficult to maintain;
2. in addition, the existing closed circulation cooling water loop does not adopt a leakage detection technology, and great potential safety hazard is brought to blast furnace production.
In view of the defects of the existing blast furnace tuyere small sleeve circulating cooling water technology, the designer actively carries out research and innovation based on the working experience and professional knowledge in the field for many years, and finally develops the high-efficiency and energy-saving circulating cooling water system technology of the blast furnace tuyere small sleeve through continuous research and design.
Disclosure of Invention
The invention aims to provide a blast furnace tuyere small-sleeve circulating cooling water system which can reduce the power consumption of a blast furnace, reduce the water loss and improve the quality of circulating water, and has the functions of leakage detection, automatic pressure stabilization and water supplement, and convenient operation, management and maintenance.
In order to achieve the purpose, the invention provides a blast furnace tuyere small sleeve circulating cooling water system which is arranged between a water outlet port and a water inlet port of a water applying point of a blast furnace tuyere small sleeve and at least comprises a closed circulating cooling water loop formed by sequentially connecting a degassing tank, an evaporative air cooler and a pressure water pump in series through water pipes.
The circulating cooling water system for the blast furnace tuyere small sleeve is characterized in that a water leakage detection device is arranged on the water passing pipe, the water leakage detection device comprises a temperature sensor and a pressure sensor, the temperature sensor and the pressure sensor respectively transmit a temperature signal and a pressure signal of cooling water close to the water inlet and the water outlet of the blast furnace tuyere small sleeve to a remote control element, and when the numerical values of the temperature signal and the pressure signal received by the control element are greater than the upper and lower limit alarm values preset in the control element, the control element sends an alarm signal.
The blast furnace tuyere small sleeve circulating cooling water system is characterized in that the temperature sensor is a platinum thermal resistance temperature sensor.
The blast furnace tuyere small sleeve circulating cooling water system is characterized in that a pressure stabilizing water supplementing device is arranged on a closed circulating cooling water loop between the evaporative air cooler and the pressure water pump, the pressure stabilizing water supplementing device comprises an expansion tank and a water supplementing tank which contain circulating cooling water, a water inlet pipe and a water outlet pipe which are communicated with a water pipe of the closed circulating cooling water loop are arranged at the lower end of the expansion tank, a liquid level meter capable of measuring the liquid level of the circulating cooling water in the expansion tank is arranged in the expansion tank, a drain pipe is further arranged at the lower end of the expansion tank, and an electric valve capable of controlling the drain pipe to be connected and disconnected is arranged on the drain pipe; the water replenishing tank is communicated with the water inlet and outlet pipe of the expansion tank through a water replenishing pipe, and a water replenishing pump is installed on the water replenishing pipe.
The blast furnace tuyere small sleeve circulating cooling water system is characterized in that the upper part of the expansion tank is communicated with an air inlet pipe and an exhaust pipe, pneumatic valves are respectively arranged on the air inlet pipe and the exhaust pipe, and the upper part of the expansion tank is also provided with a pressure sensor which controls the opening or closing of the air inlet pipe and the exhaust pipe through an external control component.
The blast furnace tuyere small sleeve circulating cooling water system comprises an evaporative air cooler, a spray water tank, a spray head, a spray circulating water pump, a fan, a closed circulating cooling water loop and a water pipe, wherein the spray water tank is internally provided with spray water, the spray head is arranged at the upper part of the spray water tank and communicated with the bottom of the spray water tank through a water pipe, the spray circulating water pump is arranged on the water pipe, the fan is arranged at the top end of the spray water tank, an annular pipe is arranged between the spray head and the water surface of the spray water in the spray water tank, and two ends of the annular pipe are respectively communicated with the water pipe of the closed circulating cooling.
The blast furnace tuyere small sleeve circulating cooling water system is characterized in that the spraying water amount in the spraying water tank is one fourth of the circulating cooling water amount of the closed circulating cooling water loop.
The blast furnace tuyere small-sleeve circulating cooling water system comprises a closed circulating cooling water loop between an evaporative air cooler and a pressure water pump, wherein the closed circulating cooling water loop is provided with a self-cleaning pipeline filter, the self-cleaning pipeline filter comprises a filter cylinder and an automatic backwashing device, the filter cylinder is provided with a filter screen, two sides of the filter screen are respectively provided with a pressure sensor, and when the water pressure difference of the two sides of the filter screen exceeds a set pressure difference value, the automatic backwashing device is started.
The circulating cooling water system for the blast furnace tuyere small sleeve is characterized in that at least two blast furnace tuyere small sleeves are connected in parallel. 16-30 of the devices are usually arranged in parallel.
Compared with the prior art, the invention has the following characteristics and advantages:
1. the invention adopts an independent closed-loop circulating cooling water loop, fully utilizes the excess pressure of the return water, and has low power consumption of the pressurizing water pump; the whole system is a closed system, the water loss is less, the water supplement amount is less, and the operation cost is greatly reduced. The defects of high power consumption, large water loss and poor water quality in the conventional technology for the small-sleeve open-circuit circulating cooling water of the blast furnace are overcome; has the advantages of low power consumption, low water loss, good water quality and the like.
2. Aiming at the unsafe factors of untimely leakage detection in production and the potential safety hazard that the safety of a closed circuit system of a small blast furnace sleeve in series is low and leakage detection cannot be carried out, the temperature sensor and the pressure sensor are arranged on the water pipes at the two ends of the small blast furnace tuyere sleeve and are remotely transmitted to a control room for monitoring and alarming, the leakage loss of the small sleeve can be timely and accurately found, the safety of the small circulating cooling water system is greatly improved, and meanwhile, the leakage detection system has high automation degree, is friendly to a human-computer interface and is convenient to monitor.
3. The invention adopts the pressure stabilizing and water supplementing device to automatically stabilize the pressure of the circulating water system and ensure the stability of the operating pressure of the system. When the circulating water system leaks, the water charging system automatically charges water.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein,
FIG. 1 is a schematic structural diagram of a blast furnace tuyere small-jacket circulating cooling water system according to an embodiment of the present invention.
FIG. 2 is a schematic structural diagram of a second embodiment of the circulating cooling water system for a tuyere small sleeve of a blast furnace according to the present invention.
Fig. 3 is a schematic structural view of an evaporative air cooler according to the present invention.
Reference numerals:
the invention comprises the following steps: 1-blast furnace tuyere small sleeve; 2-degassing tank; 3-an evaporative air cooler; 31-a spray water tank; 32-a spray head; 33-water conveying pipes; 34-a spray circulating water pump; 35-a fan; 36-a grommet; 4-a pressurized water pump; 5-a water pipe; 11-a temperature sensor; 12-a pressure sensor; 6-a filter; 61-a filter cartridge; 62-a filter screen; 7-a pressure stabilizing and water supplementing device; 71-an expansion tank; 72-water replenishing tank; 73-water inlet and outlet pipes; 74-a liquid level meter; 75-a drain pipe; 76-electrically operated valve; 77-water replenishing pipe; 78-water replenishing pump; 81-air inlet pipe; 82-an exhaust pipe; 83-inlet pneumatic valve; 84-pressure sensor of the expansion tank 71; 85-exhaust pneumatic valve.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
Referring to fig. 1, a schematic structural diagram of a blast furnace tuyere small jacket circulating cooling water system according to an embodiment of the present invention is shown. As shown in the figure, the blast furnace tuyere small sleeve circulating cooling water system provided by the invention is arranged between a water outlet port and a water inlet port of a water using point of a blast furnace tuyere small sleeve 1, and comprises a closed circulating cooling water loop formed by sequentially connecting a degassing tank 2, an evaporative air cooler 3 and a pressure water pump 4 in series through a water pipe 5. The pressurizing water pump 4 pressurizes circulating cooling water in the water pipe 5, so that the circulating cooling water circularly flows in the closed circulating cooling water loop, and the blast furnace tuyere small sleeve 1 is cooled; the degassing tank 2 can be placed on the tuyere platform and used for degassing the circulating cooling water vaporized by the high-temperature equipment to ensure the cooling quality of the cooling water; the evaporative air cooler 3 is used for cooling the circulating cooling water after heat absorption and temperature rise, so that the cooling water can be recycled. Because the invention adopts the closed-loop circulating cooling water loop, after the circulating cooling water flows through the water pipe 5, the blast furnace tuyere small sleeve 1, the degassing tank 2 and the evaporative air cooler 3 from the water outlet of the pressure water pump 4, the circulating cooling water only loses partial pressure, and still has certain pressure when returning to the water suction port of the pressure water pump 4, the pressure is used as the water suction reserve pressure of the pressure water pump 4, and the return water of the circulating cooling has reserve pressure, so the lift of the pressure water pump 4 is far lower than the pump lift in the existing open-circuit system, and the energy consumption of the equipment is greatly reduced. In addition, the invention has simple structure, does not need to be connected with other equipment of the blast furnace, has stronger independence and can ensure the long-time normal operation of the blast furnace.
Further, in this embodiment, a water leakage detection device is provided on the water pipe 5, to which the water inlet port and the water outlet port of the blast furnace tuyere small sleeve 1 are respectively connected, and the water leakage detection device includes a temperature sensor 11 and a pressure sensor 12; wherein, the temperature sensor 11 is used for measuring the temperature of the cooling water at the water inlet and outlet ends of the blast furnace tuyere small sleeve 1; the pressure sensor 12 is used for measuring the pressure of the cooling water at the water inlet and the water outlet of the blast furnace tuyere small sleeve 1. The temperature sensor 11 and the pressure sensor 12 transmit a temperature signal and a pressure signal of the cooling water detected to be close to the inlet and outlet ports of the tuyere small sleeve 1 of the blast furnace to a remote control element, such as a Programmable Logic Controller (PLC), respectively. The control element receives the temperature signal and the pressure signal, and when the detection value of the control element after conversion reaches or is larger than corresponding upper and lower limit alarm values preset in the control element, the control element sends out an alarm signal, so that leakage of the circulating pipeline is possible to occur, and the leakage detection function of the closed circulating cooling water loop is realized. In the present invention, the connection between the temperature sensor 11 and the pressure sensor 12 and the control element, and the specific structure and principle of the transmission signal are well known technologies, and will not be described in detail herein.
Preferably, the temperature sensor 11 is a platinum thermal resistance temperature sensor, the error of a platinum thermocouple can be about +/-0.15 ℃, and the accuracy of the existing pressure sensor 12 can reach 1 per thousand, so that the accuracy requirement of the blast furnace tuyere small-sleeve circulating cooling water system is met.
Further, please refer to fig. 3, which is a schematic structural diagram of the evaporative air cooler of the present invention. As shown in fig. 3, the evaporative air cooler 3 includes a spray tank 31 in which spray water is filled, a spray head 32 is installed on an upper portion of the spray tank 31, the spray head 32 is communicated with a bottom of the spray tank 31 through a water pipe 33, a spray circulation water pump 34 is installed on the water pipe 33, and the spray water in the spray tank 31 can be delivered to the spray head 32 and sprayed by the spray head 32 by pressurization of the spray circulation water pump 34. Wherein the amount of spray water in the spray water tank 31 is one fourth of the amount of circulating cooling water in the closed circulating cooling water circuit to ensure sufficient cooling of the circulating cooling water. A fan 35 is arranged at the top end of the spray water tank 31, a circular pipe 36 is arranged between the spray head 32 and the spray water surface in the spray water tank 31, and two ends of the circular pipe 36 are respectively communicated with the water pipe 5 of the closed circulation cooling water loop, so that the circulation cooling water flows through the circular pipe 36. When the cooling device is used, circulating cooling water to be cooled flows through the circular pipe 36, the spray circulating water pump 34 sucks water from a water collecting tray at the lower part of the spray water tank 31, the spray water is pressurized and sent to a spray head at the upper part of the spray water tank 31 to be sprayed, the circular pipe 36 is subjected to spray cooling, and ventilation cooling is performed through the fan 35, so that the cooling effect is further improved. Circulating water in the ring pipe 36 is not in contact with the outside, and only the temperature is reduced after passing through the air cooler, so that the water quality is not influenced. The spray water can be circularly cooled in the evaporative air cooler equipment without adding an independent spray water tank, so that the floor space is small, and the investment and the operating cost are saved.
Further, as shown in fig. 1, a filter 6 is installed on the closed circulation cooling water circuit between the evaporative air cooler 3 and the pressurized water pump 4 for filtering particles in the circulating water system. For various possible reasons, during the initial operation of the circulating water system or after the maintenance of pipelines and equipment, particles exist in the circulating water system and need to be cleaned, the self-cleaning pipeline filter 6 comprises a filter cylinder 61 and an automatic back-flushing device (not shown in the figure), a filter screen 62 is arranged on the filter cylinder 61, the filter screen 62 is a main filtering part, and after the circulating water passes through the filter screen 62, the particles contained in the circulating water are intercepted on the filter screen 62; the filter cartridge 61 is a load-bearing member of the screen 62; pressure sensors are arranged on two sides of the filter screen 62, pressure sensors are arranged on the front side and the rear side of the filter screen, when the water pressure difference before and after filtration exceeds a set pressure difference value, the situation that more particles are deposited on the filter screen and more filter holes are blocked is indicated, an automatic back washing device connected with the pressure sensors is started, the intercepted particles on the filter screen 62 are swept, and the particles are discharged outwards. The automatic backwashing device is the prior art and is not described in detail.
Further, as shown in fig. 1, the blast furnace tuyere small sleeve is provided with 3 tuyere small sleeves in parallel. The invention is not limited to the above, and the number of the blast furnace tuyere small sleeves can be 2, 4 or more according to actual needs. And 16-30 blast furnace tuyere small sleeves are usually arranged in parallel in the existing blast furnace. The water outlet port and the water inlet port of the blast furnace tuyere small sleeves are respectively connected with the water passing pipe 5, so that the blast furnace tuyere small sleeves can be circularly cooled.
The operation flow of the invention is as follows: the circulating cooling water is pressurized by a pressurizing water pump 4, enters a closed circulating cooling water loop to cool equipment (a blast furnace tuyere small sleeve), is degassed by a degassing tank 2 after being cooled, enters an evaporative air cooler 3 for cooling, is removed of large-particle impurities by a self-cleaning pipeline filter 6, and then flows back to the pressurizing water pump 4 for pressurization to complete a circulating process. Wherein, the leak detection process of the water point for the small sleeve equipment of the blast furnace is as follows: a water pipe 5 connected with a water outlet port and a water inlet port of the blast furnace small sleeve 1 is provided with a temperature sensor 11 and a pressure sensor 12, and an operation alarm signal is transmitted to a control room display screen for display, so that an operator can take relevant measures rapidly, and the stability of system operation is greatly improved.
Referring to fig. 2, another alternative embodiment of the present invention is a schematic structural diagram of a second embodiment of the circulating cooling water system for a tuyere small sleeve of a blast furnace according to the present invention. In this embodiment, the same reference numerals are used for the same components as in the first embodiment.
As shown in fig. 2, a pressure stabilizing water replenishing device 7 is arranged on the closed circulating cooling water loop between the evaporative air cooler 3 and the pressure water pump 4, the pressure stabilizing water replenishing device 7 can be placed in an air port platform or a pressure pump station, the pressure stabilizing water replenishing device 7 comprises an expansion tank 71 containing circulating cooling water and a water replenishing tank 72, and a water inlet and outlet pipe 73 communicated with the water pipe 5 of the closed circulating cooling water loop is arranged at the lower end of the expansion tank 71, so that the circulating cooling water of the expansion tank 71 and the water replenishing tank 72 can flow into the water pipe 5 through the water inlet and outlet pipe 73, and the circulating cooling water in the water pipe 5 can also flow into the expansion tank 71 through the water inlet and outlet pipe 73. A liquid level meter 74 capable of measuring the liquid level height of circulating cooling water in the expansion tank 71 is arranged in the expansion tank 71, a drain pipe 75 is further arranged at the lower end of the expansion tank 71, an electric valve 76 capable of controlling the on-off of the drain pipe 75 is mounted on the drain pipe 75, and the on-off of the drain pipe 75 is controlled through the electric valve 76, so that the drainage function of the expansion tank 71 is realized; the water replenishing tank 72 is communicated with the water inlet and outlet pipe 73 of the expansion tank 71 through a water replenishing pipe 77, and a water replenishing pump 78 is installed on the water replenishing pipe 77. The circulating cooling water (softened water) in the water replenishing tank 72 can be conveyed to the water pipe 5 through the water inlet and outlet pipe 73 by the water replenishing pump 78, so that the water replenishing function of the closed circulating cooling water loop is realized.
Further, an air inlet pipe 81 and an air outlet pipe 82 are communicated with the upper portion of the expansion tank 71, pneumatic valves (an air inlet pneumatic valve 83 and an air outlet pneumatic valve 85) are respectively mounted on the air inlet pipe 81 and the air outlet pipe 82, a pressure sensor 84 is further arranged on the upper portion of the expansion tank 71, the pressure sensor 84 is connected with an external control component, and the external control component controls the opening or closing of the air inlet pipe 81 and the air outlet pipe 82 through a pressure signal in the expansion tank sent by the pressure sensor 84 of the expansion tank, so that the pressure value in the expansion tank 71 is kept within a set pressure range. When the closed circulation cooling water loop has leakage and can not continuously stabilize the pressure only through the expansion tank 71, the water replenishing pump 78 is interlocked with the liquid level meter 74 and is started through a control part to replenish water into the closed circulation cooling water loop, so that the pressure of the circulation water system is ensured to be stable, and the production is ensured to be continuously carried out in the process of checking the leakage of the system. The pressure stabilizing and water supplementing device 7 can play a role in stabilizing pressure in normal operation and can also play a role in supplementing water when trace leakage occurs to the system.
In use, the electric valve 76 is connected with the liquid level meter 74 in the expansion tank 71 through a control part, so that the electric valve 76 is opened or closed according to the detection value of the liquid level meter 74; the water replenishment pump 78 is also connected to the liquid level meter 74 in the expansion tank 71 via a control unit, so that the water replenishment pump 78 is also turned on or off in accordance with the value detected by the liquid level meter 74. When the temperature of the circulating cooling water rises in the closed circulating cooling water loop, the volume of the circulating cooling water in the loop expands, the pressure increases, so that the circulating cooling water flows into the expansion tank 71 through the water inlet and outlet pipe 73, and the water level in the expansion tank 71 rises; when the liquid level meter 74 in the expansion tank 71 monitors that the set high liquid level is reached, the electric valve 76 is opened, water in the expansion tank 71 is discharged outwards, and when the liquid level in the expansion tank 71 reaches the normal liquid level, the electric valve 76 is closed. When the closed circulation cooling water loop has a leakage condition, the pressure of the circulation cooling water is reduced, so that the water in the expansion tank 71 flows into the closed circulation cooling water loop through the water inlet and outlet pipe 73 to supplement water to the loop; if the closed circulation cooling water loop is continuously leaked, the liquid level of the expansion tank 71 is continuously reduced, when the liquid level meter 74 in the expansion tank 71 monitors that the liquid level reaches a low liquid level, the water replenishing pump 78 is started, softened water is pumped from the water replenishing tank 72 to replenish water in the closed circulation cooling water loop and the expansion tank 71, and the water replenishing pump 78 is stopped until the liquid level of the expansion tank 71 reaches a normal liquid level.
In order to keep the pressure in the expansion tank 71 in a normal working range, an air inlet air-operated valve 83 and an air outlet air-operated valve 85 respectively arranged on an air inlet pipe 81 and an air outlet pipe 82 are opened or closed through the action of a pressure sensor 84 in the expansion tank 71, namely when the pressure in the expansion tank 71 is larger than a set maximum pressure value, the air outlet air-operated valve 85 is opened, nitrogen filled in the expansion tank 71 is discharged to the atmosphere, and when the pressure in the expansion tank 71 is smaller than or equal to the set maximum pressure value, the air outlet air-operated valve 85 is closed; when the pressure in the expansion tank 71 is less than the set minimum pressure value, the intake air-operated valve 83 is opened to replenish nitrogen gas into the expansion tank 71, and the intake air-operated valve 83 is closed until the pressure in the expansion tank 71 is greater than or equal to the set minimum pressure value.
The pressure stabilizing and water supplementing device 7 is provided with a PLC cabinet, is connected with equipment such as a liquid level meter, a pressure sensor, an electric valve, a pneumatic valve and a water supplementing pump through cables, and is used for receiving control signals of the equipment such as the liquid level meter and the pressure sensor and realizing the interlocking control of the electric valve, the pneumatic valve and the water supplementing pump. The specific structure and control process of the PLC cabinet are well known in the art and will not be described in detail herein.
Other structures, working principles and beneficial effects of the embodiment are the same as those of the first embodiment, and are not described herein again.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (10)
1. The blast furnace tuyere small sleeve circulating cooling water system is characterized by being arranged between a water outlet port and a water inlet port of a water applying point of a blast furnace tuyere small sleeve, and at least comprising a closed circulating cooling water loop formed by sequentially connecting a degassing tank, an evaporative air cooler and a pressure water pump in series through water pipes.
2. The blast furnace tuyere small sleeve circulating cooling water system as claimed in claim 1, wherein a water leakage detecting device is provided on the water passing pipe to which the water inlet port and the water outlet port of the blast furnace tuyere small sleeve are respectively connected, the water leakage detecting device comprises a temperature sensor and a pressure sensor, the temperature sensor and the pressure sensor respectively transmit a temperature signal and a pressure signal of the cooling water approaching the water inlet port and the water outlet port of the blast furnace tuyere small sleeve to a remote control element, and the control element sends an alarm signal when values of the temperature signal and the pressure signal received by the control element are greater than upper and lower limit alarm values preset in the control element.
3. The blast furnace tuyere small jacket circulating cooling water system of claim 2, wherein the temperature sensor is a platinum thermistor temperature sensor.
4. The blast furnace tuyere small set circulating cooling water system as set forth in any one of claims 1 to 3, wherein a pressure stabilizing water replenishing device is provided on a closed circulating cooling water circuit between the evaporative air cooler and the pressure water pump, the pressure stabilizing water replenishing device comprises an expansion tank and a water replenishing tank for containing circulating cooling water, a water inlet and outlet pipe communicated with a water pipe of the closed circulating cooling water circuit is provided at the lower end of the expansion tank, a liquid level gauge capable of measuring the level of the circulating cooling water in the expansion tank is provided in the expansion tank, a drain pipe is further provided at the lower end of the expansion tank, and an electric valve capable of controlling the on-off of the drain pipe is mounted on the drain pipe; the water replenishing tank is communicated with the water inlet and outlet pipe of the expansion tank through a water replenishing pipe, and a water replenishing pump is installed on the water replenishing pipe.
5. The blast furnace tuyere small jacket circulating cooling water system of claim 4, wherein an intake pipe and an exhaust pipe are communicated with the upper part of the expansion tank, pneumatic valves are respectively installed on the intake pipe and the exhaust pipe, and a pressure sensor is further arranged on the upper part of the expansion tank and controls the opening or closing of the intake pipe and the exhaust pipe through an external control component.
6. The blast furnace tuyere small jacket circulating cooling water system as set forth in any one of claims 1 to 3, wherein the evaporative air cooler comprises a spray tank in which spray water is contained, a spray head is installed on the upper part of the spray tank, the spray head is communicated with the bottom of the spray tank through a water pipe, a spray circulating water pump is installed on the water pipe, a fan is installed on the top end of the spray tank, a loop pipe is installed between the spray head and the spray water surface in the spray tank, and both ends of the loop pipe are respectively communicated with a water passing pipe of the closed circulating cooling water loop.
7. The blast furnace tuyere stock circulating cooling water system of claim 6, wherein the amount of spray water in the spray water tank is one-fourth of the amount of circulating cooling water of the closed circulating cooling water circuit.
8. The blast furnace tuyere small-sleeve circulating cooling water system as set forth in any one of claims 1 to 3, wherein a self-cleaning pipe filter is installed on the closed circulating cooling water circuit between the evaporative air cooler and the pressurized water pump, the self-cleaning pipe filter includes a filter cartridge and an automatic backwashing device, the filter cartridge is provided with a filter screen, pressure sensors are provided on both sides of the filter screen, and the automatic backwashing device is turned on when a water pressure difference on both sides of the filter screen exceeds a set pressure difference value.
9. The blast furnace tuyere small sleeve circulating cooling water system as claimed in any one of claims 1 to 3, wherein at least two blast furnace tuyere small sleeves are provided in parallel.
10. The blast furnace tuyere small sleeve circulating cooling water system as claimed in claim 9, wherein 16 to 30 blast furnace tuyere small sleeves are connected in parallel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106120992A CN102021256A (en) | 2010-12-29 | 2010-12-29 | Circulating cooling water system for blast furnace tuyere small sleeve |
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| CN2010106120992A CN102021256A (en) | 2010-12-29 | 2010-12-29 | Circulating cooling water system for blast furnace tuyere small sleeve |
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| CN102021256A true CN102021256A (en) | 2011-04-20 |
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| CN2010106120992A Pending CN102021256A (en) | 2010-12-29 | 2010-12-29 | Circulating cooling water system for blast furnace tuyere small sleeve |
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Cited By (13)
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| CN102230678A (en) * | 2011-05-04 | 2011-11-02 | 武汉中圣能源环保工程有限公司 | Automatic pressure stabilization device of high-temperature heat collection system |
| CN102312028A (en) * | 2011-09-29 | 2012-01-11 | 中冶南方工程技术有限公司 | Pressure control device of blast furnace soft water closed circulation expansion tank |
| CN103929016A (en) * | 2014-04-28 | 2014-07-16 | 中船重工(重庆)海装风电设备有限公司 | Water cooling system of offshore wind generating unit |
| CN105120635A (en) * | 2015-09-10 | 2015-12-02 | 江苏永昇空调有限公司 | New-energy wireless charging pile liquid cooling source |
| CN107340102A (en) * | 2017-06-16 | 2017-11-10 | 中国南方电网有限责任公司超高压输电公司柳州局 | A kind of converter valve cooling system leakage detection method and system |
| CN108529796A (en) * | 2018-03-07 | 2018-09-14 | 上海梅山钢铁股份有限公司 | A kind of high-voltage motor cooling water recirculation system |
| CN110846452A (en) * | 2019-11-27 | 2020-02-28 | 邯郸钢铁集团有限责任公司 | Device and method for searching leakage point of damaged cooling wall of blast furnace |
| CN111102840A (en) * | 2019-12-30 | 2020-05-05 | 广西南国铜业有限责任公司 | Smelt bigeminal furnace circulating water system |
| CN111411186A (en) * | 2019-01-04 | 2020-07-14 | 新疆八一钢铁股份有限公司 | Ou ye stove shaft furnace roof atomizer |
| CN111504080A (en) * | 2020-05-12 | 2020-08-07 | 国网河北省电力有限公司电力科学研究院 | High-level arranged steam turbine set auxiliary machine cooling water device based on pressure regulating water tank |
| CN112082310A (en) * | 2020-09-17 | 2020-12-15 | 中天钢铁集团有限公司 | Blast furnace soft water circulating system and temperature control method thereof |
| CN112984661A (en) * | 2021-03-30 | 2021-06-18 | 中国石油集团东北炼化工程有限公司沈阳分公司 | Air cooler capable of resisting severe summer heat and severe cold weather |
| CN114959139A (en) * | 2021-02-24 | 2022-08-30 | 山西太钢不锈钢股份有限公司 | Power-loss emergency device of blast furnace cooling water system and use method thereof |
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| CN102230678A (en) * | 2011-05-04 | 2011-11-02 | 武汉中圣能源环保工程有限公司 | Automatic pressure stabilization device of high-temperature heat collection system |
| CN102312028A (en) * | 2011-09-29 | 2012-01-11 | 中冶南方工程技术有限公司 | Pressure control device of blast furnace soft water closed circulation expansion tank |
| CN103929016A (en) * | 2014-04-28 | 2014-07-16 | 中船重工(重庆)海装风电设备有限公司 | Water cooling system of offshore wind generating unit |
| CN105120635A (en) * | 2015-09-10 | 2015-12-02 | 江苏永昇空调有限公司 | New-energy wireless charging pile liquid cooling source |
| CN107340102A (en) * | 2017-06-16 | 2017-11-10 | 中国南方电网有限责任公司超高压输电公司柳州局 | A kind of converter valve cooling system leakage detection method and system |
| CN108529796A (en) * | 2018-03-07 | 2018-09-14 | 上海梅山钢铁股份有限公司 | A kind of high-voltage motor cooling water recirculation system |
| CN111411186A (en) * | 2019-01-04 | 2020-07-14 | 新疆八一钢铁股份有限公司 | Ou ye stove shaft furnace roof atomizer |
| CN110846452A (en) * | 2019-11-27 | 2020-02-28 | 邯郸钢铁集团有限责任公司 | Device and method for searching leakage point of damaged cooling wall of blast furnace |
| CN110846452B (en) * | 2019-11-27 | 2024-02-09 | 邯郸钢铁集团有限责任公司 | Device and method for searching leakage points of damaged cooling wall of blast furnace |
| CN111102840A (en) * | 2019-12-30 | 2020-05-05 | 广西南国铜业有限责任公司 | Smelt bigeminal furnace circulating water system |
| CN111102840B (en) * | 2019-12-30 | 2020-09-15 | 广西南国铜业有限责任公司 | Smelt bigeminal furnace circulating water system |
| CN111504080A (en) * | 2020-05-12 | 2020-08-07 | 国网河北省电力有限公司电力科学研究院 | High-level arranged steam turbine set auxiliary machine cooling water device based on pressure regulating water tank |
| CN112082310A (en) * | 2020-09-17 | 2020-12-15 | 中天钢铁集团有限公司 | Blast furnace soft water circulating system and temperature control method thereof |
| CN114959139A (en) * | 2021-02-24 | 2022-08-30 | 山西太钢不锈钢股份有限公司 | Power-loss emergency device of blast furnace cooling water system and use method thereof |
| CN112984661A (en) * | 2021-03-30 | 2021-06-18 | 中国石油集团东北炼化工程有限公司沈阳分公司 | Air cooler capable of resisting severe summer heat and severe cold weather |
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Application publication date: 20110420 |