CN219907732U - Circulating water cooling and recovering device under accident state of blast furnace gear box - Google Patents
Circulating water cooling and recovering device under accident state of blast furnace gear box Download PDFInfo
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- CN219907732U CN219907732U CN202321277716.7U CN202321277716U CN219907732U CN 219907732 U CN219907732 U CN 219907732U CN 202321277716 U CN202321277716 U CN 202321277716U CN 219907732 U CN219907732 U CN 219907732U
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- water
- cooling
- heat exchange
- filter
- heat exchanger
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 190
- 238000001816 cooling Methods 0.000 title claims abstract description 60
- 239000000498 cooling water Substances 0.000 claims abstract description 20
- 239000010865 sewage Substances 0.000 claims abstract description 16
- 238000004064 recycling Methods 0.000 claims abstract description 10
- 239000008213 purified water Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 230000001502 supplementing effect Effects 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The utility model relates to a circulating water cooling and recycling device under a blast furnace gear box accident state, which comprises a water pump, a filter, a lifting pump station water circulation system, a gear box cooling water tank, a heat exchanger, a filter drain pipe, a filter drain valve, a heat exchange drain pipe, a heat exchange drain valve and an air port clean ring water return water tank, wherein the heat exchanger is connected with the gear box cooling water tank through a cooling pipeline; a filter drain valve is arranged on the filter drain pipe, and a heat exchange drain valve is arranged on the heat exchanger drain pipe; the cooling effect of the gear box is guaranteed, sewage in the filter and high-temperature heat exchange circulating water are discharged into the air port clean circulating water backwater tank to circulate, no external discharge exists, the circulating use is realized, and the water is saved.
Description
Technical Field
The utility model relates to the technical field of iron-making equipment, in particular to a circulating water cooling and recycling device under the accident state of a blast furnace gear box.
Background
The S cup is equivalent to an open water tank (water source), a water pump in the water cooling station pumps water at negative pressure, heat is exchanged through a plate heat exchanger, heat transmitted by a gear box is exchanged to a water circulation system of a lifting pump station, water with reduced temperature is transmitted into the S cup of the gear box, a water pipe is additionally connected to a return water pipeline of a closed circulation system of the demineralized water of the blast furnace, water supplementing of the circulation system of the water cooling station is completed through a pneumatic valve, a water level gauge is arranged in the S cup, and the circulation system is ensured not to be deficient in water and to be maintained in a normal water level interval by setting an upper limit water level and a lower limit water level to be interlocked with a water supplementing pneumatic valve; in order to ensure the water safety of the water cooling station, the water supplementing pipeline is connected with the water inlet pipeline of the lifting pump station at the same time, so that when the desalted water is not enough, the water can be converted into new water for supplementing water, and the high-pressure purified water of the tuyere small sleeve can be connected with the water inlet pipeline of the lifting pump station, so that when the water pump of the lifting pump station fails, the secondary cooling water and the water supplementing water are continuously supplied to the water cooling station.
When the production of the blast furnace is continuously carried out, because the temperature of nitrogen and circulating water is increased in summer, especially when the temperature of the top of the blast furnace is high, the temperature of the gear box can be maintained to be higher, and the nitrogen flow is increased to reduce the temperature, so that more nitrogen is required to be consumed, but the density of water is high, the cooling effect is better, the flow is low, the price is low, and the reasonable water regulation is adopted, so that the water consumption is more reasonable from the aspects of cost and cooling effect.
The Chinese patent with publication number of CN207418782U discloses a cooling system of a gear box at the top of a blast furnace, which comprises a main loop system and a water supplementing loop system, wherein the main loop water adopts soft water with pH of 7.5-9.0, and is matched with a pH sensor to control the water quality of the main loop, so that the pollution of the water quality to a circulating water loop and all equipment contacted with water is avoided, the surface of a water pipe is further polluted, the heat exchange capacity between the water and the water pipe is reduced, the water pipe is further blocked, the nitrogen consumption of the gear box is increased due to the reduction of the cooling capacity, and the running cost of the blast furnace is reduced; however, the problem of the water pipe structure is mainly solved, and the problem that the cooling effect is reduced due to the fact that the temperature rises after the water cooling of the gear box cannot be solved.
Chinese patent publication No. CN217173772U discloses a cooling system for a blast furnace gear box comprising a main cooling system and a backup cooling system; the main cooling system is formed by sequentially connecting a water cooling station water pump, a gear box cooling pipeline and a receiving tank; the standby cooling system is formed by sequentially connecting a lifting pump station water pump, a water cooling station plate heat exchanger and a water tank; the outlet pipeline of the water pump of the lifting pump station is connected with the outlet pipeline of the water pump of the water cooling station through a connecting pipeline, and a valve is arranged on the connecting pipeline; the utility model uses the water source of the plate heat exchanger of the water-cooling station as the standby cooling water source of the gear box, and realizes the automatic switching of the cooling water supply in case of failure by installing a matched valve and an interlocking device, but the patent mainly aims at ensuring the circulation cooling in case of failure of the water pump of the water-cooling station, and the water temperature is reduced by draining through a drain pipe after the water temperature is higher, but the water pipe diameter of the drain pipe is larger, the flow rate and the flow rate of the drain pipe are larger, and the water is easy to empty, so that the cooling accident occurs.
Disclosure of Invention
The utility model provides a circulating water cooling and recycling device under the accident state of a blast furnace gear box, which is characterized in that when the temperature of the top of the blast furnace is high in summer, a heat exchange drain pipe is added to continuously discharge heat exchange circulating water with higher temperature in a heat exchanger, so that the circulating water temperature of a water cooling station is conveniently and rapidly reduced, the cooling effect of the gear box is ensured, a filter drain pipe is added to drain sewage in a filter into a wind gap clean circulating water backwater trough for recycling; the sewage in the filter and the high-temperature heat exchange circulating water are discharged into the air outlet clean circulating water backwater tank for circulation, no discharge exists, the circulating use is realized, and the water is saved.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
the circulating water cooling and recycling device comprises a water pump, a filter, a lifting pump station water circulation system, a gear box cooling water tank and a heat exchanger, wherein the heat exchanger is connected with the gear box cooling water tank through a cooling pipeline;
the filter drain pipe is connected with the sewage outlet end of the filter, the heat exchange drain pipe is arranged at the outlet end of a heat exchange pipeline of the heat exchanger, and the filter drain pipe and the heat exchanger drain pipe are both connected to the air port clean water return water tank; and a filter drain valve is arranged on the filter drain pipe, and a heat exchange drain valve is arranged on the heat exchanger drain pipe.
Further, the water circulation system of the lifting pump station comprises a water tank, a lifting pump, a cooling tower, an overflow pipe, a sewage drain pipe and a water supply plant water supply pipe, wherein the water tank is connected with a heat exchanger through a pipeline, the lifting pump is arranged between an inlet of a heat exchange pipeline of the heat exchanger and the water tank, the cooling tower is arranged between an outlet of the heat exchange pipeline of the heat exchanger and the water tank, the water supply plant water supply pipe is connected with the water tank, the overflow pipe is arranged on the upper portion of the water tank, the sewage drain pipe is arranged on the lower portion of the water tank, and the overflow pipe is mutually communicated with the sewage drain pipe.
Furthermore, the filter drain valve and the heat exchange drain valve adopt electric valves.
Furthermore, the water supplementing valve and the water draining valve adopt electric valves.
Further, the pipe diameters of the filter drain pipe and the heat exchange drain pipe are DN 40-DN 50.
Compared with the prior art, the utility model has the beneficial effects that:
1) When the temperature of the top of the blast furnace is high in summer, the heat exchange water with higher temperature in the heat exchanger is continuously discharged through the heat exchange drain pipe, so that the temperature of circulating water of the water cooling station is conveniently and rapidly reduced, and the cooling effect of the gear box is ensured;
2) A filter drain pipe is added to drain the sewage in the filter into an air port clean ring water backwater tank for recycling;
3) The sewage in the filter and the high-temperature heat exchange circulating water are discharged into the air outlet clean circulating water backwater tank for circulation, no discharge exists, the circulating use is realized, and the water is saved.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In the figure: 1. the water pump 2, the filter 3, the gear box cooling water tank 4, the water tank 5, the lifting pump 6, the cooling tower 7, the drain pipe 8, the overflow pipe 9, the water supply pipe 10, the heat exchanger 11, the air port water-purifying return water tank 12, the filter drain valve 13, the heat exchange drain valve 14, the filter drain pipe 15, the heat exchange drain pipe 16, the blast furnace water-removing salt water replenishing water
Detailed Description
The following is a further description of embodiments of the utility model, taken in conjunction with the accompanying drawings:
fig. 1 is a schematic diagram of the structure of the present utility model. The utility model relates to a circulating water cooling and recycling device under the accident state of a blast furnace gear box, which comprises a water pump 1, a filter 2, a lifting pump station water circulation system, a gear box cooling water tank 3 and a heat exchanger 10, wherein the heat exchanger 10 is a plate heat exchanger, the heat exchanger 10 is connected with the gear box cooling water tank 3 through a cooling pipeline, a filter 12 is arranged between the outlet end of the cooling pipeline of the heat exchanger 10 and the gear box cooling water tank 3, the water pump 1 is arranged between the inlet end of the cooling pipeline of the heat exchanger 10 and the gear box cooling water tank 3, and a heat exchange pipeline of the heat exchanger 10 is connected with the lifting pump station water circulation system;
the sewage treatment device further comprises a filter drain pipe 14, a filter drain valve 12, a heat exchange drain pipe 15, a heat exchange drain valve 13 and an air port clean circulating water backwater tank 11, wherein the filter drain pipe 14 is connected with the sewage outlet end of the filter 2, the heat exchange drain pipe 15 is arranged at the outlet end of a heat exchange pipeline of the heat exchanger 10, and the filter drain pipe 14 and the heat exchanger drain pipe 15 are connected to the air port clean circulating water backwater tank 11; the filter drain pipe 14 is provided with a filter drain valve 12, the heat exchange drain pipe 15 is provided with a heat exchange drain valve 13, the filter drain valve 12 and the heat exchange drain valve 13 are all electric valves, and the pipe diameters of the filter drain pipe 14 and the heat exchange drain pipe 15 are DN50.
The lifting pump station water circulation system comprises a water tank 4, a lifting pump 5, a cooling tower 6, an overflow pipe 8, a sewage drain pipe 7 and a water supply plant water supply pipe 9, wherein the water tank 4 is connected with a heat exchanger 10 through a pipeline, the lifting pump 5 is arranged between a heat exchange pipeline inlet of the heat exchanger 10 and the water tank 4, the cooling tower 6 is arranged between a heat exchange pipeline outlet of the heat exchanger 10 and the water tank 4, the water supply plant water supply pipe 9 is connected with the water tank 4, the overflow pipe 8 is arranged on the upper portion of the water tank 4, the sewage drain pipe 7 is arranged on the lower portion of the water tank, and the overflow pipe 8 is mutually communicated with the sewage drain pipe 7.
The working principle is as follows: the method comprises the steps that (1) cooling water circulation power is provided by a water pump 1 at a blast furnace inlet, cooling water flows out from a cooling water pipeline outlet of a heat exchanger 10, is injected into a gearbox cooling water tank 3 through a filter 2, cools the gearbox, periodically opens a filter drain valve 12, discharges sewage in the filter 2 to an air port clean ring water return water tank 11, and enters the clean ring water for recycling;
the water supply pipe 9 of the water supply plant injects heat exchange circulating water into the water tank 4, when the water level of the water tank 4 is too high, water in the water tank 4 flows out through the overflow pipe 8, the drain pipe 7 below is opened periodically, cooling water in the water tank 4 is pumped through the lifting pump 5, enters the heat exchanger 10 through the heat exchange pipeline inlet of the heat exchanger 10, exchanges heat and cools cooling water in the cooling pipeline of the heat exchanger 10, the heat exchanged hot water is cooled through the cooling tower 6 and flows back to the water tank 4, a branch pipeline is arranged between the water outlet pipeline and the water inlet pipeline of the cooling tower 6, and when the cooling tower 6 is overhauled, the heat exchanged hot water flows back to the water tank through the branch pipeline;
when the temperature of circulating water per se is high in summer or when the temperature of the top of a blast furnace is high and the cooling effect of the cooling tower 6 cannot meet the requirement, the heat exchange drain valve 13 is opened, the heat exchange circulating water is continuously discharged to the air gap purified circulating water backwater trough 11 through the heat exchange drain pipe 15, the water supply pipe 9 of a water supply plant supplements new heat exchange circulating water, the heat exchange efficiency of the heat exchanger 10 is ensured, and the cooling effect of the gear box is ensured;
the pipe diameters of the filter drain pipe 14 and the heat exchange drain pipe 15 are DN50, the water level of the water tank 4 of the water circulation system of the lifting pump station is interlocked with the heat exchange drain valve 13 and the valve on the water supply pipe 9 of the water supply plant, when the water level in the water tank 4 is lower than a limiting value, the heat exchange drain valve 13 is closed, the valve arranged on the water supply pipe 9 of the water supply plant is opened, and new heat exchange circulating water is supplemented.
The above examples are implemented on the premise of the technical scheme of the present utility model, and detailed implementation manners and specific operation processes are given, but the protection scope of the present utility model is not limited to the following examples. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (5)
1. The circulating water cooling and recycling device comprises a water pump, a filter, a lifting pump station water circulation system, a gear box cooling water tank and a heat exchanger, wherein the heat exchanger is connected with the gear box cooling water tank through a cooling pipeline;
the device is characterized by further comprising a filter drain pipe, a filter drain valve, a heat exchange drain pipe, a heat exchange drain valve and a tuyere purified water return water tank, wherein the filter drain pipe is connected with a filter sewage outlet end, the heat exchange drain pipe is arranged at the outlet end of a heat exchange pipeline of the heat exchanger, and the filter drain pipe and the heat exchanger drain pipe are both connected to the tuyere purified water return water tank; and a filter drain valve is arranged on the filter drain pipe, and a heat exchange drain valve is arranged on the heat exchange drain pipe.
2. The circulating water cooling and recycling device under the accident state of the blast furnace gearbox according to claim 1, wherein the water circulating system of the lifting pump station comprises a water tank, a lifting pump, a cooling tower, an overflow pipe, a blow-down pipe and a water supply plant water inlet pipe, the water tank is connected with a heat exchanger through a pipeline, the lifting pump is arranged between the heat exchange pipeline inlet of the heat exchanger and the water tank, the cooling tower is arranged between the heat exchange pipeline outlet of the heat exchanger and the water tank, the water supply plant water inlet pipe is connected with the water tank, the overflow pipe is arranged at the upper part of the water tank, the blow-down pipe is arranged at the lower part of the water tank, and the overflow pipe is mutually communicated with the blow-down pipe.
3. The cooling and recovering apparatus for circulating water in an accident condition of a blast furnace gear box according to claim 1, wherein the heat exchanger is a plate heat exchanger.
4. The cooling and recovering device for circulating water in an accident state of a blast furnace gear box according to claim 1, wherein the filter drain valve and the heat exchange drain valve are electrically operated valves.
5. The cooling and recovering device for circulating water in the accident condition of a blast furnace gear box according to claim 1, wherein the pipe diameters of the filter drain pipe and the heat exchanger drain pipe are DN 40-DN 50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321277716.7U CN219907732U (en) | 2023-05-24 | 2023-05-24 | Circulating water cooling and recovering device under accident state of blast furnace gear box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321277716.7U CN219907732U (en) | 2023-05-24 | 2023-05-24 | Circulating water cooling and recovering device under accident state of blast furnace gear box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219907732U true CN219907732U (en) | 2023-10-27 |
Family
ID=88462636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321277716.7U Active CN219907732U (en) | 2023-05-24 | 2023-05-24 | Circulating water cooling and recovering device under accident state of blast furnace gear box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219907732U (en) |
-
2023
- 2023-05-24 CN CN202321277716.7U patent/CN219907732U/en active Active
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