CN220685184U - Energy-saving and emission-reducing blast furnace circulating cooling water system - Google Patents
Energy-saving and emission-reducing blast furnace circulating cooling water system Download PDFInfo
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- CN220685184U CN220685184U CN202322263740.1U CN202322263740U CN220685184U CN 220685184 U CN220685184 U CN 220685184U CN 202322263740 U CN202322263740 U CN 202322263740U CN 220685184 U CN220685184 U CN 220685184U
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- 239000000498 cooling water Substances 0.000 title claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 262
- 238000001816 cooling Methods 0.000 claims abstract description 89
- 238000003756 stirring Methods 0.000 claims description 14
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims 1
- 230000008676 import Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000005265 energy consumption Methods 0.000 abstract description 12
- 230000001105 regulatory effect Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 16
- 238000000034 method Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Blast Furnaces (AREA)
Abstract
The utility model discloses an energy-saving and emission-reducing blast furnace circulating cooling water system which comprises a blast furnace, a hot water tank, a cold water tank and a cooling tower, wherein the hot water tank and the cold water tank are of closed structures, the hot water tank is positioned in the cold water tank, a cooling water outlet of the blast furnace is communicated with the hot water tank through a hot water pipe, a water diversion pipe is arranged on the hot water pipe and is communicated with the cold water tank, flow regulating valves are arranged on the hot water pipe and the water diversion pipe, a water outlet of the hot water tank is communicated with a water inlet of the cooling tower through a pipeline, a water outlet of the cooling tower is communicated with the cold water tank through a pipeline, and the bottom of the cold water tank is communicated with a cooling water inlet of the blast furnace through a pipeline. The utility model has the advantages of low energy consumption, low production cost, safety and reliability.
Description
Technical Field
The utility model relates to the technical field of blast furnace cooling, in particular to an energy-saving and emission-reducing blast furnace circulating cooling water system.
Background
The circulating cooling water system of the blast furnace is an important component in blast furnace smelting, and has the main functions as follows: firstly, the temperature of the refractory material is reduced, so that the refractory material maintains certain strength, and further, a furnace type with reasonable operation is maintained, and the service life of the blast furnace is prolonged and the safe production is realized; secondly, the furnace lining is promoted to form a protective slag crust, an iron crust and a graphite layer, the furnace lining is protected, and the furnace lining is replaced to work; thirdly, the furnace shell and the metal components are protected from the influence of high temperature and the damage is reduced. The structure of the cooling water circulation system of the blast furnace mainly comprises a cold water tank, a hot water tank and a plurality of cooling towers, when the cooling water circulation system is in operation, cold water in the cold water tank is introduced into the blast furnace through a water pump, the cold water is changed into hot water after heat exchange of the blast furnace and flows to the hot water tank, hot water in the hot water tank is sent into each cooling tower through a water pipe, and the hot water is changed into cold water again after heat exchange and cooling and is sent into the cold water tank, so that the cooling water circulation system is circulated and reciprocated, water resources are saved, and the waste water emission is reduced, and meanwhile, the cooling of the blast furnace is realized.
The blast furnace circulating cooling water system has certain defects when in operation: firstly, in the production process of the blast furnace, the temperature difference between the water inlet and outlet of the blast furnace is about 2 ℃, namely the temperature difference between a cold water tank and a hot water tank is about 2 ℃, but the design temperature of a cooling tower is about 10 ℃, the cooling effect is far greater than the temperature difference requirement of the water inlet and outlet of the blast furnace, so that the water inlet temperature of the blast furnace is often far lower than the normal water supply temperature required by the production process of the blast furnace, and the water inlet temperature of the blast furnace can meet the use requirement, but can cause unnecessary energy consumption, increase the production cost and cause energy waste; secondly, when the blast furnace is in production operation, the heat loads of different parts of the blast furnace can be changed, and if the cooling capacity of cooling water cannot be timely adjusted according to the change, the problem that the cooling effect cannot meet the cooling requirement can be possibly caused, so that the safety production of the blast furnace is threatened. Therefore, the development of the energy-saving and emission-reducing blast furnace circulating cooling water system with low energy consumption and low production cost is objectively required.
Disclosure of Invention
The utility model aims to provide a safe and reliable energy-saving and emission-reducing blast furnace circulating cooling water system with low energy consumption and low production cost.
The utility model aims at realizing the purposes, and the cooling device comprises a blast furnace, a hot water tank, a cold water tank and a cooling tower, wherein the hot water tank and the cold water tank are of closed structures, the hot water tank is positioned in the cold water tank, a cooling water outlet of the blast furnace is communicated with the hot water tank through a hot water pipe, a water diversion pipe is arranged on the hot water pipe and is communicated with the cold water tank, flow regulating valves are arranged on the hot water pipe and the water diversion pipe, a water outlet of the hot water tank is communicated with a water inlet of the cooling tower through a pipeline, a water outlet of the cooling tower is communicated with the cold water tank through a pipeline, and the bottom of the cold water tank is communicated with a cooling water inlet of the blast furnace through a pipeline.
Further, a filter is arranged on a pipeline between the cooling water inlet of the blast furnace and the cold water tank.
Further, an exhaust tank is arranged on the hot water pipe close to the cooling water outlet of the blast furnace, an exhaust pipe is arranged at the top of the exhaust tank, and a drain pipe is arranged at the bottom of the exhaust tank.
Further, a motor is arranged at the top of the cold water tank, an output shaft of the motor stretches into the cold water tank and then is connected with a vertical shaft, and an inverted U-shaped stirring plate is arranged on the vertical shaft.
Further, the lower end of the vertical shaft extends into the hot water tank, and a stirring paddle is arranged on the vertical shaft in the hot water tank.
Further, a water supplementing pipe is arranged on the cold water tank.
Further, a plurality of heat-conducting plates are uniformly distributed on the outer wall of the hot water tank.
When the utility model is operated, cooling water is introduced into the blast furnace, after absorbing heat, the cooling water is changed into hot water, the hot water is divided into two parts, one part of the hot water is discharged into the hot water tank through the hot water pipe, the other part of the hot water is discharged into the cold water tank through the water dividing pipe, then the hot water is discharged into the cooling tower from the hot water tank, cold water is obtained by cooling in the cooling tower, the cold water enters the cold water tank, finally, the cold water flows back to the blast furnace to be continuously cooled by the blast furnace, the water can be recycled in a reciprocating way, the water resource is saved, the discharge of the hot water is reduced, and the environment is prevented from being polluted. In the process, hot water discharged from the blast furnace is divided into two parts by the hot water pipe and the water diversion pipe, only one part of hot water is led into the cooling tower for cooling, so that the workload of the cooling tower is reduced, and the energy consumption of hot water cooling is further reduced, and the cooling design temperature of the cooling tower is generally about 10 ℃, so that the cooling effect is far greater than the temperature difference requirement of water entering and exiting the blast furnace, on one hand, cold water discharged from the cooling tower is directly mixed with part of hot water, on the other hand, the heat emitted by the hot water tank is absorbed, the temperature of the cold water is slightly increased, but the requirement of cooling of the blast furnace can be met, on the premise that the requirement of cooling of the blast furnace is met, the energy consumption is reduced, and the production cost is further reduced, so that the energy saving effect is realized; when the cooling device is used, the proportion of hot water entering the hot water tank and the cold water tank can be regulated in real time according to the change of the heat load of the blast furnace, when the heat load of the blast furnace is increased, the hot water entering the hot water tank can be properly increased, more cold water is obtained through the cooling tower, the temperature after being mixed with the hot water is lower, and further the cooling effect meets the cooling requirement of the blast furnace, otherwise, when the heat load of the blast furnace is reduced, the hot water entering the hot water tank can be properly reduced, the quantity of hot water required to be cooled by the cooling tower is small, the obtained temperature after the cold water and the hot water are mixed is higher, the cooling requirement of the blast furnace can be met, and by adopting the mode, the cooling effect of the cooling water can be timely regulated according to the real-time change of the heat load of the blast furnace on the premise that the cooling requirement of the blast furnace is met, and the running safety of the blast furnace is ensured. The utility model has the advantages of low energy consumption, low production cost, safety and reliability.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
in the figure: 1-blast furnace, 2-hot water tank, 3-cold water tank, 4-cooling tower, 5-hot water pipe, 6-shunt pipe, 7-flow control valve, 8-filter, 9-exhaust tank, 10-motor, 11-vertical axis, 12-U-shaped stirring board, 13-stirring rake, 14-moisturizing pipe, 15-heat-conducting plate.
Description of the embodiments
The utility model is further described below with reference to the accompanying drawings, without limiting the utility model in any way, and any alterations or modifications based on the utility model are within the scope of the utility model.
As shown in figure 1, the utility model comprises a blast furnace 1, a hot water tank 2, a cold water tank 3 and a cooling tower 4, wherein the blast furnace 1 and the cooling tower 4 are all existing equipment, the blast furnace 1 is used for making iron, the cooling tower 4 is used for cooling hot water, the temperature of the hot water is reduced to obtain cold water, the cooling requirement of the blast furnace 1 is met, the hot water tank 2 and the cold water tank 3 are both in a closed structure, the hot water tank 2 is positioned in the cold water tank 3, a cooling water outlet of the blast furnace 1 is communicated with the hot water tank 2 through a hot water pipe 5, a water diversion pipe 6 is arranged on the hot water pipe 5, the hot water pipe 5 and the water diversion pipe 6 divide the hot water into two parts, one part of the hot water is directly sent into the cold water tank 3 and mixed with the cold water to obtain cold water with slightly higher temperature, the other part of the cold water is firstly sent into the hot water tank 2, a certain amount of heat is dissipated into the cold water, then the cooling tower 4 is sent into the cooling tower 4 to cool the cold water with lower temperature, the water diversion pipe 6 is communicated with the cold water tank 3, flow regulating valves 7 are arranged on the hot water pipe 5 and the water diversion pipe 6, the water outlet of the hot water tank 2 is communicated with the water inlet of the cold water tank 4 through a pipeline 3, and the water inlet of the cooling pipeline 1 is communicated with the bottom of the cooling water tank 1 through the pipeline. In the utility model, under general conditions, the required water temperature difference between the inlet and outlet of the blast furnace 1 is about 2 ℃, and the water temperature difference at the inlet and outlet of the cooling tower 4 is about 10 ℃, namely, the cooled water temperature is reduced by about 10 ℃ compared with the original hot water temperature, the cooled cold water cooled by the cooling tower 4 can meet the cooling requirement of the blast furnace 1, and the cooling effect is far greater than the temperature difference requirement of the inlet water and the outlet water of the blast furnace 1, so that the inlet water temperature of the blast furnace 1 is often far lower than the normal water supply temperature required by the production process of the blast furnace 1, and the water temperature can meet the use requirement, but can cause unnecessary energy consumption, increase the production cost and cause the waste of energy. Compared with the traditional method, the circulating cooling water system provided by the utility model has the advantages that on the premise of meeting the cooling effect of the blast furnace 1, the cooling tower 4 only cools a part of hot water, so that the energy consumption of the cooling tower 4 is reduced, the production cost is reduced, the energy-saving effect is realized, and secondly, the cooling water system can be regulated according to the cooling requirement of the blast furnace 1 for changing the heat load, so that the cooling water system can always meet the cooling requirement of the blast furnace 1 under various conditions, and the use is flexible and the applicability is better.
When the utility model is in operation, cooling water is introduced into the blast furnace 1, absorbs heat and becomes hot water, the hot water is divided into two parts, one part is discharged into the hot water tank 2 through the hot water pipe 5, the other part is discharged into the cold water tank 3 through the water dividing pipe 6, then the hot water is discharged into the cooling tower 4 from the hot water tank 2, cold water is obtained by cooling in the cooling tower 4, the cold water enters the cold water tank 3, finally, the cold water flows back to the blast furnace 1 to cool the blast furnace continuously, the water can be recycled in a reciprocating way, the water resource is saved, the discharge of the hot water is reduced, and the environment is prevented from being polluted. In the process, the hot water discharged from the blast furnace 1 is divided into two parts by the hot water pipe 5 and the water diversion pipe 6, and only one part of hot water is introduced into the cooling tower 4 for cooling, so that the workload of the cooling tower 4 is reduced, and the energy consumption of hot water cooling is further reduced, and the cooling effect of the cooling tower 4 is far greater than the temperature difference requirement of water entering and exiting the blast furnace 1 because the cooling design temperature of the cooling tower 4 is generally about 10 ℃, so that cold water discharged from the cooling tower 4 is directly mixed with part of hot water on one hand, the heat emitted by the hot water tank 2 is absorbed on the other hand, the temperature of the cold water is slightly increased, but the requirement of blast furnace cooling can be met in the water inlet temperature range of the blast furnace 1, and the energy consumption is reduced on the premise of meeting the cooling requirement of the blast furnace 1 by the mode, so that the production cost is reduced, and the energy saving effect is achieved; secondly, when the utility model is used, the proportion of hot water entering the hot water tank 2 and the cold water tank 3 can be regulated in real time according to the change of the heat load of the blast furnace, when the heat load of the blast furnace 1 is increased, the hot water entering the hot water tank 2 can be properly increased, more cold water is obtained through the cooling tower 4, the temperature after being mixed with the hot water is lower, so that the cooling effect meets the cooling requirement of the blast furnace 1, otherwise, when the heat load of the blast furnace 1 is reduced, the hot water entering the hot water tank 2 can be properly reduced, the amount of the hot water required to be cooled by the cooling tower 4 is less, the temperature after the obtained cold water is mixed with the hot water is higher, the cooling requirement of the blast furnace 1 can be met, and on the premise of meeting the cooling requirement of the blast furnace 1, the cooling effect of the cooling water can be timely regulated according to the real-time change of the heat load of the blast furnace, and the running safety of the blast furnace 1 is ensured.
The filter 8 is arranged on a pipeline between the cooling water inlet of the blast furnace 1 and the cold water tank 3, and the filter 8 is the existing equipment and is used for filtering impurities such as scale and residues in circulating water and preventing the system from being blocked due to accumulation of the impurities such as the scale and the residues.
An exhaust tank 9 is arranged on the hot water pipe 5 close to the cooling water outlet of the blast furnace 1, an exhaust pipe is arranged at the top of the exhaust tank 9, a drain pipe is arranged at the bottom of the exhaust tank 9, cold water enters the blast furnace 1 to cool the blast furnace 1, the self-absorption blast furnace heat temperature rises, certain water vapor can be generated in the process, the water vapor flows along with water flow in the system, on one hand, the cooling effect of hot water in the cooling tower 4 can be influenced, on the other hand, the cooling effect of cold water on the blast furnace 1 can be influenced, the efficient and stable operation of a circulating cooling water system is not facilitated, therefore, when hot water is discharged from the blast furnace 1, the hot water is introduced into the exhaust tank 9, the water vapor is discharged from the exhaust pipe, and the hot water without water vapor is discharged from the drain pipe.
The motor 10 is installed at the top of cold water tank 3, be connected with vertical axis 11 after the output shaft of motor 10 stretches into in the cold water tank 3, be provided with on the vertical axis 11 and be the U-shaped stirring board 12 of inverted, start motor 10, motor 10 drives vertical axis 11 and U-shaped stirring board 12 in proper order and rotates, U-shaped stirring board 12 stirs the mixed water in the cold water tank 3 in the rotation in-process, accelerate the mixed speed of hot water and cold water in the cold water tank 3, promote the temperature of each position in the cold water tank 3 even unanimity, and then ensure the cooling effect of cold water to blast furnace 1 in the follow-up process.
The lower extreme of vertical axle 11 stretches into the inside of hot-water tank 2, is provided with stirring rake 13 on the vertical axle 11 in the hot-water tank 2, and during operation, stirring rake 13 rotates along with vertical axle 11 together, and stirring rake 13 stirs hot water at the rotation in-process for hot water in the hot-water tank 2 is flowing state, and then promotes the heat in the hot water to cold water transfer, accelerates the cooling rate of hot water.
The water supplementing pipe 14 is arranged on the cold water tank 3, the circulating cooling water system inevitably causes certain water loss in the continuous operation process, and when the water loss reaches a certain degree, the cooling requirement of the blast furnace operation can not be met, and then new cooling water can be supplemented to the system through the water supplementing pipe 14.
A plurality of heat-conducting plates 15 are uniformly distributed on the outer wall of the hot water tank 2, the surface area of the hot water tank 2 can be increased through the heat-conducting plates 15, the heat exchange area of hot water and cold water is further increased, the heat exchange efficiency of the hot water and the cold water is finally improved, the heat in the hot water is absorbed through the cold water, the temperature of the hot water is reduced, the cooling load of a subsequent cooling tower 4 is reduced, and the energy consumption of the cooling tower 4 is further reduced.
Claims (7)
1. The utility model provides an energy-saving and emission-reducing blast furnace circulating cooling water system, includes blast furnace (1), hot-water tank (2), cold-water tank (3) and cooling tower (4), wherein hot-water tank (2) and cold-water tank (3) are enclosed construction, and hot-water tank (2) are located the inside of cold-water tank (3), the cooling water export of blast furnace (1) is through hot-water line (5) and hot-water tank (2) intercommunication, be provided with shunt tubes (6) on hot-water line (5), shunt tubes (6) and cold-water tank (3) intercommunication, all be provided with flow control valve (7) on hot-water line (5) and shunt tubes (6), the delivery port of hot-water tank (2) is through pipeline and cooling tower (4) water inlet intercommunication, and cooling tower (4) delivery port and cold-water tank (3) intercommunication, the bottom of cold-water tank (3) is through pipeline and blast furnace (1) cooling water import intercommunication.
2. The energy-saving and emission-reducing blast furnace circulating cooling water system according to claim 1 is characterized in that a filter (8) is arranged on a pipeline between a cooling water inlet of the blast furnace (1) and the cold water tank (3).
3. The energy-saving and emission-reducing blast furnace circulating cooling water system according to claim 1, wherein an exhaust tank (9) is arranged on a hot water pipe (5) close to a cooling water outlet of the blast furnace (1), an exhaust pipe is arranged at the top of the exhaust tank (9), and a drain pipe is arranged at the bottom of the exhaust tank.
4. The energy-saving and emission-reducing blast furnace circulating cooling water system according to claim 1, wherein a motor (10) is arranged at the top of the cold water tank (3), a vertical shaft (11) is connected after an output shaft of the motor (10) stretches into the cold water tank (3), and an inverted U-shaped stirring plate (12) is arranged on the vertical shaft (11).
5. The energy-saving and emission-reducing blast furnace circulating cooling water system according to claim 4, wherein the lower end of the vertical shaft (11) extends into the hot water tank (2), and stirring paddles (13) are arranged on the vertical shaft (11) in the hot water tank (2).
6. The energy-saving and emission-reducing blast furnace circulating cooling water system according to claim 1, wherein the cold water tank (3) is provided with a water supplementing pipe (14).
7. The energy-saving and emission-reducing blast furnace circulating cooling water system according to claim 1 is characterized in that a plurality of heat-conducting plates (15) are uniformly distributed on the outer wall of the hot water tank (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322263740.1U CN220685184U (en) | 2023-08-23 | 2023-08-23 | Energy-saving and emission-reducing blast furnace circulating cooling water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322263740.1U CN220685184U (en) | 2023-08-23 | 2023-08-23 | Energy-saving and emission-reducing blast furnace circulating cooling water system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220685184U true CN220685184U (en) | 2024-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322263740.1U Active CN220685184U (en) | 2023-08-23 | 2023-08-23 | Energy-saving and emission-reducing blast furnace circulating cooling water system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220685184U (en) |
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2023
- 2023-08-23 CN CN202322263740.1U patent/CN220685184U/en active Active
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