CN214361478U - Cooling and heating device for blast furnace top equipment - Google Patents
Cooling and heating device for blast furnace top equipment Download PDFInfo
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- CN214361478U CN214361478U CN202023080326.XU CN202023080326U CN214361478U CN 214361478 U CN214361478 U CN 214361478U CN 202023080326 U CN202023080326 U CN 202023080326U CN 214361478 U CN214361478 U CN 214361478U
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Abstract
The utility model belongs to the technical field of blast furnace cooling and heating equipment, and relates to a cooling and heating device for blast furnace top equipment, which comprises a lower valve box accident cooling system connected with a lower valve box, a distributor sealing and cooling system connected with a distributor, and a vortex tube; the vortex tube is provided with a vortex tube air inlet and a vortex tube cold air outlet; and the cold air outlet of the vortex tube is respectively connected with a distributor sealing and cooling system and a lower valve box accident cooling system. The utility model provides an air supply temperature height, cooling system heat exchange efficiency is low, problem that the running cost is high.
Description
Technical Field
The utility model belongs to the technical field of blast furnace cooling and heating equipment, and relates to a cooling and heating device for blast furnace top equipment.
Background
The blast furnace top distributing device is a core device closest to a blast furnace body in bell-less charging equipment, and in order to ensure the normal operation of the equipment, sealing nitrogen needs to be introduced into the distributing device so as to prevent dust-containing coal gas in the blast furnace from entering; meanwhile, the introduced nitrogen also has a cooling effect to maintain the proper working temperature in the distributor; the lower valve box is positioned above the distributor, and once the temperature of the furnace top is abnormally increased, nitrogen also needs to be introduced to cool the lower valve box.
The sealing and cooling of the distributing device and the accident cooling of the lower valve box generally adopt a normal-temperature nitrogen source, and the nitrogen source directly enters the blast furnace after being introduced into furnace top equipment and cannot be recycled. The nitrogen consumption of the distributor and the lower valve box under normal furnace conditions is about 800-1200 Nm3H, at 2000Nm in accident situation3Over/h, particularly in summer, pipelines are exposed to the sun, the temperature of nitrogen is high, the heat exchange efficiency is low, more nitrogen has to be introduced to cool equipment, and the operation cost is high.
Meanwhile, dust is easy to adhere to valve seats of upper and lower sealing valves in furnace top equipment after dew condensation, and the sealing effect is affected, so that when the temperature of the valve seats is detected to be lower than 90 ℃, steam is introduced to heat the valve seats, and therefore the steam needs to be consumed by about 0.5t/h, and meanwhile, the steam is easy to precipitate water, so that the pipeline corrosion is caused, and the maintenance cost is increased.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at solving the problems of high air source temperature, low cooling system heat exchange efficiency and high operation cost, and provides a cooling and heating device for blast furnace top equipment.
In order to achieve the above purpose, the utility model provides a following technical scheme: a cooling and heating device for blast furnace top equipment comprises a lower valve box accident cooling system connected with a lower valve box, a distributor sealing and cooling system connected with a distributor, and a vortex tube; the vortex tube is provided with a vortex tube air inlet and a vortex tube cold air outlet; and the cold air outlet of the vortex tube is respectively connected with a distributor sealing and cooling system and a lower valve box accident cooling system.
The principle of the basic scheme is as follows: the vortex tube is an energy separation device, when in work, high-pressure gas enters a nozzle through a gas inlet pipe, high-speed rotating airflow is formed in a vortex chamber, and finally energy separation is generated to form cold airflow and hot airflow, wherein the cold airflow has low temperature and is connected into a distributor sealing and cooling system and a lower valve box accident cooling system.
The beneficial effect of this basic scheme lies in: the energy separation function of a vortex tube is utilized to divide an air source into a cold air flow and a hot air flow, wherein the cold air flow has lower temperature, and the cold air flow is connected into a distributor sealing and cooling system and a lower valve box accident cooling system to cool the distributor and the lower valve box; the temperature of the air flow entering the cooling system is lower, and the cooling effect is better.
Further, the device also comprises a heat exchanger; the heat exchanger is provided with a heat exchanger air inlet and a heat exchanger air outlet; the vortex tube is also provided with a vortex tube hot gas outlet; the hot gas outlet of the vortex tube is connected with the gas inlet of the heat exchanger; the heat exchanger gas outlet is sealed and cooling system, lower valve case accident cooling system with the distributing device respectively is connected, beneficial effect: the heat exchanger is added, the hot air flow separated out by the vortex pipeline is cooled through the heat exchanger and then is introduced into the cooling system, and the air source is recycled, so that the use cost is reduced.
Further, a mixed gas pipe is arranged between the cold gas outlet of the vortex tube and the sealing and cooling system of the distributing device and between the cold gas outlet of the vortex tube and the accident cooling system of the lower valve box; the cold air outlet of the vortex tube is connected with the mixed air tube through a cold end air outlet tube of the vortex tube; the gas outlet of the heat exchanger is connected with the mixed gas pipe through a gas outlet pipe of the heat exchanger; the hot gas outlet of the vortex tube is connected with the air inlet of the heat exchanger through the hot end air outlet pipe of the vortex tube, and the heat exchanger has the advantages that: the cold air generated by the vortex tube and the cold air generated by the heat exchanger are mixed in the mixed air pipe, the temperature of the obtained air flow is lower than that of a normal-temperature air source, and the obtained air flow is connected into a cold air outlet of the vortex tube, a distributor sealing and cooling system and a lower valve box accident cooling system, so that the heat exchange efficiency is higher.
Further, all be equipped with flow valve, beneficial effect on vortex tube cold junction outlet duct and the heat exchanger outlet duct: and adjusting the flow valve according to the temperature condition of the equipment, controlling the airflow and further adjusting the cooling effect.
Further, a heat exchanger cut-off valve is arranged between the hot gas outlet of the vortex tube and the heat exchanger; heat exchanger trip valve one end is connected with vortex tube hot junction outlet duct, and the other end is connected with the heat exchanger air inlet, beneficial effect: the flow direction of hot air generated by the vortex tube is controlled by a heat exchanger cut-off valve.
Further, the device also comprises a sealing valve seat heating system; seal valve disk seat heating system locates between vortex tube hot gas export and the heat exchanger to arrange in parallel with the heat exchanger trip valve, beneficial effect: the hot air flow separated from the vortex tube is used for heating the valve seat of the sealing valve, the heat energy of the air flow is fully utilized, the hot air flow is used for replacing steam, and the service life of the pipeline is prolonged.
Further, be equipped with the check valve between seal valve disk seat heating system and the heat exchanger, beneficial effect: preventing gas from flowing backwards.
Further, be equipped with heating system trip valve between vortex tube hot gas export and the seal valve disk seat heating system, beneficial effect: and controlling whether the gas flows to the sealing valve seat heating system or not through a heating system stop valve.
Furthermore, a temperature detection device and a pressure detection device are arranged on the outlet pipe of the cold end of the vortex tube, the outlet pipe of the hot end of the vortex tube, the outlet pipe of the heat exchanger and the mixed gas pipe; still be equipped with flow detection device on the gas mixing pipe, beneficial effect: the temperature detection device, the pressure detection device and the flow detection device are arranged, so that the state of the device can be monitored conveniently.
The beneficial effects of the utility model reside in that: the energy separation principle of the vortex tube is utilized, the gas source is divided into cold air flow and hot air flow, the hot air flow separated by the vortex tube replaces steam and is used for heating the valve seat of the sealing valve, the heat energy of the air flow is fully utilized, and the service life of the pipeline is prolonged; the hot air flow is cooled by the heat exchanger to finally form two cold air flows, and the two cold air flows are mixed and then are simultaneously connected into a distributor sealing and cooling system and a lower valve box accident cooling system to cool the distributor and the lower valve box; the air source with the same volume has higher cooling efficiency, thereby reducing the using amount of the air source and reducing the cost.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a clear understanding of the objects, aspects and advantages of the invention, reference will now be made in detail to the preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
reference numerals: 1-nitrogen source; 2-a vortex tube; 3-a heat exchanger; 4-flow valve; 5-a heating system shut-off valve; 6-heat exchanger cut-off valve; 7-distributor sealing and cooling system; 8-lower valve box accident cooling system; 9-sealing valve seat heating system; 10-a check valve; 11-vortex tube cold end outlet pipe; 12-a hot end air outlet pipe of the vortex tube; 13-heat exchanger inlet pipe; 14-heating system inlet pipe; 15-heating system air outlet pipe; 16-heat exchanger outlet pipe; 17-mixed gas pipe; 18-a cold water inlet pipe; 19-a cold water return pipe; 20-a distributor; 21-lower valve box; 22-flow detection means; 23-temperature detection means; 24-a pressure detection device; 201-vortex tube air inlet; 202-vortex tube cold air outlet; 203-vortex tube hot gas outlet; 301-heat exchanger inlet; 302-heat exchanger outlet.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
Referring to fig. 1, the cooling and heating device for a blast furnace top equipment comprises a lower valve box accident cooling system 8 connected with a lower valve box 21, a distributor sealing and cooling system 7 connected with a distributor 20, a vortex tube 2 and a heat exchanger 3; wherein the vortex tube 2 is provided with a vortex tube air inlet 201, a vortex tube cold air outlet 202 and a vortex tube hot air outlet 203; the air inlet 201 of the vortex tube is connected with a nitrogen gas source 1; the heat exchanger 3 is provided with a heat exchanger air inlet 301 and a heat exchanger air outlet 302; a heat exchanger cut-off valve 6 is arranged between the hot gas outlet 203 of the vortex tube and the heat exchanger 3; the hot gas outlet 203 of the vortex tube is connected with the hot end outlet pipe 12 of the vortex tube; one end of the heat exchanger cut-off valve 6 is connected with a hot end air outlet pipe 12 of the vortex tube, and the other end is connected with a heat exchanger air inlet 301 through a heat exchanger air inlet pipe 13; the mixed gas pipe 17 is connected with the distributor sealing and cooling system 7 and the lower valve box accident cooling system 8; the cold air outlet 202 of the vortex tube is connected with the mixed air tube 17 through the cold end air outlet tube 11 of the vortex tube; the heat exchanger air outlet 302 is connected with the mixed gas pipe 17 through a heat exchanger air outlet pipe 16; and flow valves 4 are respectively arranged on the outlet pipe 11 at the cold end of the vortex tube and the outlet pipe 16 of the heat exchanger.
In this embodiment, a sealing valve seat heating system 9 is further provided, the sealing valve seat heating system 9 is installed between the vortex tube hot gas outlet 203 and the heat exchanger air inlet 301, and the sealing valve seat heating system 9 and the heat exchanger cut-off valve 6 are arranged in parallel; the sealing valve seat heating system 9 is connected with the upper and lower sealing valve seats; a heating system air inlet pipe 14 is arranged between the sealing valve seat heating system 9 and the vortex tube hot end air outlet pipe 12, a heating system cut-off valve 5 is arranged on the heating system air inlet pipe 14, a heating system air outlet pipe 15 is arranged between the sealing valve seat heating system 9 and the heat exchanger air inlet pipe 13, and a check valve 10 is arranged on the heating system air outlet pipe 15.
In this embodiment, the cold water of the heat exchanger 3 is connected to the cold water inlet pipe 18 from the blast furnace clean loop water, and the return water is connected to the blast furnace clean loop water return pipe through the cold water return pipe 19.
In the embodiment, a temperature detection device 23 and a pressure detection device 24 are respectively arranged on the outlet pipe 11 at the cold end of the vortex tube, the outlet pipe 12 at the hot end of the vortex tube, the outlet pipe 16 of the heat exchanger and the mixed gas pipe 17; the mixed gas pipe 17 is also provided with a flow rate detection device 22.
In this embodiment, the hot nitrogen flow separated by the vortex tube 2 is divided into the following two flows:
firstly, when the valve seats of the upper and lower sealing valves are higher than 90 ℃, the heating system 9 of the valve seats of the sealing valves does not need to be heated, the heat exchanger cut-off valve 6 is opened, and the heating system cut-off valve 5 is closed; the nitrogen is separated into cold nitrogen and hot nitrogen by the vortex tube 2, and the cold nitrogen flows into the mixed gas tube 17 through the outlet tube 11 at the cold end of the vortex tube; hot nitrogen enters the heat exchanger 3 through the outlet pipe 12 at the hot end of the vortex tube and the cut-off valve 6 of the heat exchanger for heat exchange, then is mixed with cold nitrogen in the mixed gas pipe 17 through the outlet pipe 16 of the heat exchanger, and then respectively enters the sealing and cooling system 7 of the distributing device and the accident cooling system 8 of the lower valve box for the distributing device 20 and the lower valve box 21 to use.
Second, when the upper and lower sealing valve seats are lower than 90 ℃, the sealing valve seat heating system 9 needs to heat, the heat exchanger cut-off valve 6 is closed, and the heating system cut-off valve 5 is opened: the nitrogen is separated into cold nitrogen and hot nitrogen by the vortex tube 2, and the cold nitrogen flows into the mixed gas tube 17 through the outlet tube 11 at the cold end of the vortex tube; hot nitrogen enters a sealing valve seat heating system 9 through a vortex tube hot end air outlet pipe 12 and a heating system cut-off valve 5 to provide heat energy for the sealing valve seat heating system 9, then enters a heat exchanger air inlet pipe 13 through a heating system air outlet pipe 15 and a check valve 10 to exchange heat with a heat exchanger 3, then is mixed with cold nitrogen in a mixed air pipe 17 through a heat exchanger air outlet pipe 16, and then enters a distributing device sealing and cooling system 7 and a lower valve box accident cooling system 8 through the mixed air pipe 17 to be used by a distributing device 20 and a lower valve box 21.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a blast furnace roof equipment is with cooling and heating device, includes the lower valve box accident cooling system who is connected with lower valve box, the sealed and cooling system of distributing device who is connected with the distributing device which characterized in that: the device also comprises a vortex tube and a heat exchanger; the vortex tube is provided with a vortex tube air inlet and a vortex tube cold air outlet; the cold air outlet of the vortex tube is respectively connected with a distributor sealing and cooling system and a lower valve box accident cooling system; the heat exchanger is provided with a heat exchanger air inlet and a heat exchanger air outlet; the vortex tube is also provided with a vortex tube hot gas outlet; the hot gas outlet of the vortex tube is connected with the gas inlet of the heat exchanger; and the air outlet of the heat exchanger is respectively connected with a distributor sealing and cooling system and a lower valve box accident cooling system.
2. The cooling and heating apparatus for a blast furnace roof equipment according to claim 1, characterized in that: a mixed gas pipe is arranged between the cold gas outlet of the vortex tube and the sealing and cooling system of the distributing device and between the cold gas outlet of the vortex tube and the accident cooling system of the lower valve box; the cold air outlet of the vortex tube is connected with the mixed air tube through a cold end air outlet tube of the vortex tube; the gas outlet of the heat exchanger is connected with the mixed gas pipe through a gas outlet pipe of the heat exchanger; and the hot gas outlet of the vortex tube is connected with the air inlet of the heat exchanger through a hot end air outlet pipe of the vortex tube.
3. The cooling and heating apparatus for a blast furnace roof equipment according to claim 2, characterized in that: and flow valves are arranged on the outlet pipe of the cold end of the vortex tube and the outlet pipe of the heat exchanger.
4. The cooling and heating apparatus for a blast furnace roof equipment according to claim 2, characterized in that: a heat exchanger cut-off valve is arranged between the hot gas outlet of the vortex tube and the heat exchanger; one end of the heat exchanger cut-off valve is connected with an air outlet pipe at the hot end of the vortex tube, and the other end of the heat exchanger cut-off valve is connected with an air inlet of the heat exchanger.
5. The cooling and heating apparatus for a blast furnace roof equipment according to claim 4, characterized in that: the sealing valve seat heating system is also included; and the sealing valve seat heating system is arranged between the hot gas outlet of the vortex tube and the heat exchanger and is arranged in parallel with the heat exchanger cut-off valve.
6. The cooling and heating apparatus for a blast furnace roof equipment according to claim 5, characterized in that: and a check valve is arranged between the sealing valve seat heating system and the heat exchanger.
7. The cooling and heating apparatus for a blast furnace roof equipment according to claim 5, characterized in that: and a heating system cut-off valve is arranged between the hot gas outlet of the vortex tube and the heating system of the seal valve seat.
8. The cooling and heating apparatus for a blast furnace roof equipment according to claim 2, characterized in that: the vortex tube cold end air outlet pipe, the vortex tube hot end air outlet pipe, the heat exchanger air outlet pipe and the mixed air pipe are respectively provided with a temperature detection device and a pressure detection device; and the mixed gas pipe is also provided with a flow detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023080326.XU CN214361478U (en) | 2020-12-17 | 2020-12-17 | Cooling and heating device for blast furnace top equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023080326.XU CN214361478U (en) | 2020-12-17 | 2020-12-17 | Cooling and heating device for blast furnace top equipment |
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| Publication Number | Publication Date |
|---|---|
| CN214361478U true CN214361478U (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023080326.XU Active CN214361478U (en) | 2020-12-17 | 2020-12-17 | Cooling and heating device for blast furnace top equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113088593A (en) * | 2021-04-02 | 2021-07-09 | 马鞍山钢铁股份有限公司 | Cooling system for lower valve box of blast furnace and using method thereof |
-
2020
- 2020-12-17 CN CN202023080326.XU patent/CN214361478U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113088593A (en) * | 2021-04-02 | 2021-07-09 | 马鞍山钢铁股份有限公司 | Cooling system for lower valve box of blast furnace and using method thereof |
| CN113088593B (en) * | 2021-04-02 | 2022-04-01 | 马鞍山钢铁股份有限公司 | Cooling system for lower valve box of blast furnace and using method thereof |
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