CN216047593U - Waste heat recovery device for steel production - Google Patents
Waste heat recovery device for steel production Download PDFInfo
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- CN216047593U CN216047593U CN202121899962.7U CN202121899962U CN216047593U CN 216047593 U CN216047593 U CN 216047593U CN 202121899962 U CN202121899962 U CN 202121899962U CN 216047593 U CN216047593 U CN 216047593U
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- waste heat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model discloses a waste heat recovery device for steel production, which comprises a boiler body, wherein a supporting rod and a supporting plate are arranged above the boiler body, two waste heat recovery boxes are symmetrically arranged above the supporting plate, steam pipes are arranged in the waste heat recovery boxes, the lower ends of the two steam pipes are jointly connected with a three-way connecting pipe, a fan is arranged at the middle position of the top of the boiler body, a water pump is arranged above the waste heat recovery boxes, the input end of the water pump is communicated with an external water source, the output end of the water pump is connected with a water inlet pipe, a water spray disc and a spray nozzle are connected below the water inlet pipe, and the bottom of the waste heat recovery boxes is communicated with the boiler body through a water drain pipe; the fan and the water pump are electrically connected with the PLC. The waste heat recovery boiler is simple and convenient to operate and high in practicability, high-temperature flue gas generated in the boiler body enters the waste heat recovery tank to heat water, the heated water can flow back to the boiler body to be used again, the use of fuel is reduced, and the production cost is reduced.
Description
Technical Field
The utility model relates to the technical field of steel production, in particular to a waste heat recovery device for steel production.
Background
In steel production, a boiler is used for energy conversion, wherein the boiler uses solid, liquid or gas fuel, and steam, high-temperature water or other heat carriers are output outwards through conversion of the boiler. When the boiler is used, a large amount of high-temperature flue gas is generated, and a large amount of heat is contained; if the heat in the flue gas can not be reasonably utilized, a large amount of heat energy can be wasted, the use of fuel is increased, and the production cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a waste heat recovery device for steel production, which solves the problems that heat in high-temperature flue gas generated during boiler use is difficult to recycle, heat energy is wasted, fuel consumption is increased, and production cost is increased.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model relates to a waste heat recovery device for steel production, which comprises a boiler body, wherein support rods are arranged at four corners of the upper surface of the boiler body, a support plate is arranged above the support rods, two waste heat recovery tanks are symmetrically arranged above the support plate, steam pipes are arranged in the waste heat recovery tanks, the lower ends of the two steam pipes penetrate through the bottoms of the waste heat recovery tanks and the support plate and are commonly connected with a three-way connecting pipe, the upper ends of the steam pipes extend to the outer parts of the waste heat recovery tanks, a fan is arranged at the middle position of the top of the boiler body, an air inlet of the fan is communicated with the boiler body through a pipeline, an air outlet of the fan is communicated with the three-way connecting pipe, a water pump is arranged above the waste heat recovery tanks, the input end of the water pump is communicated with an external water source, and the output end of the water pump is connected with a water inlet pipe, a water spray disc is connected below the water inlet pipe, a plurality of spray heads are arranged at the bottom of the water spray disc, and the bottom of the waste heat recovery tank is communicated with the boiler body through a drain pipe; the fan and the water pump are electrically connected with the PLC.
Further, a flow control device is arranged on the water inlet pipe, and the flow control device is set as a proportional control valve; the drain pipe is provided with a second valve, and the flow control device and the second valve are electrically connected with the PLC.
Still further, a first valve is arranged at one end, close to the three-way connecting pipe, of the steam pipe, a temperature sensor is arranged at one end, close to the exhaust port, of the steam pipe, and the first valve and the temperature sensor are electrically connected with the PLC.
Still further, be provided with filter assembly on the air-supply line of fan, filter assembly includes first connecting pipe, first connecting pipe with boiler body intercommunication, the surface threaded connection of first connecting pipe has the threaded sleeve, the right side of first connecting pipe is provided with solid fixed cylinder, gu fixed cylinder's internally mounted has the filter screen, gu fixed cylinder's right side threaded connection has the screwed pipe, the right side of screwed pipe is connected with the second connecting pipe, the second connecting pipe with the fan intercommunication.
Still further, the inside of waste heat recovery case is provided with the stirring subassembly, the stirring subassembly includes the motor, the motor is installed the top of waste heat recovery case, the output shaft of motor has the (mixing) shaft, a plurality of stirring leaves have evenly been arranged in the outside of (mixing) shaft, the motor with the PLC controller electricity is connected.
Still further, the steam pipe is set to be spiral, the steam pipe is fixed on the inner wall of the waste heat recovery box, and the stirring shaft and the stirring blades are arranged inside the steam pipe.
Still further, the water spray disc is circular, a circular hole is formed in the middle of the water spray disc, the stirring shaft penetrates through the circular hole and then extends downwards, and the plurality of spray heads are uniformly arranged on the bottom surface of the water spray disc.
Compared with the prior art, the utility model has the beneficial technical effects that:
the utility model relates to a waste heat recovery device for steel production, which comprises a boiler body, wherein support rods are arranged at four corners of the upper surface of the boiler body, a support plate is arranged above the support rods, two waste heat recovery tanks are symmetrically arranged above the support plate, steam pipes are arranged inside the waste heat recovery tanks, the lower ends of the two steam pipes penetrate through the bottoms of the waste heat recovery tanks and the support plate and are commonly connected with a three-way connecting pipe, the upper ends of the steam pipes extend to the outside of the waste heat recovery tanks, a fan is arranged at the middle position of the top of the boiler body, an air inlet of the fan is communicated with the boiler body through a pipeline, an air outlet of the fan is communicated with the three-way connecting pipe, a water pump is arranged above the waste heat recovery tanks, the input end of the water pump is communicated with an external water source, the output end of the water pump is connected with a water inlet pipe, a water spray disc is connected below the water inlet pipe, and a plurality of spray nozzles are arranged at the bottom of the water spray disc, the bottom of the waste heat recovery tank is communicated with the boiler body through a drain pipe; the fan and the water pump are electrically connected with the PLC; the utility model has simple operation and strong practicability, the high-temperature flue gas generated in the boiler body enters the waste heat recovery tank to heat the water in the waste heat recovery tank, and the heated water flows back to the boiler body to be used again, thereby greatly reducing the use of fuel, further reducing the economic cost of steel production and being worth popularizing and using.
Drawings
The utility model is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic structural view of a waste heat recovery device for steel production according to the present invention;
FIG. 2 is a schematic view of the stirring assembly of the present invention;
FIG. 3 is a schematic view of the filter assembly of the present invention;
FIG. 4 is a schematic view of the structure of the water spraying plate of the present invention;
description of reference numerals: 1. a boiler body; 2. a support bar; 3. a support plate; 4. a waste heat recovery tank; 5. a steam pipe; 6. a three-way connecting pipe; 7. a first valve; 8. a fan; 9. a first connecting pipe; 10. a threaded sleeve; 11. a fixed cylinder; 12. a threaded pipe; 13. a filter screen; 14. a second connecting pipe; 15. a water inlet pipe; 16. a flow control device; 17. a water spray disc; 18. a water pump; 19. a spray head; 20. a drain pipe; 21. a second valve; 22. a motor; 23. a stirring shaft; 24. stirring blades; 25. a temperature sensor.
Detailed Description
As shown in fig. 1-4, a waste heat recovery device for steel production comprises a boiler body 1, wherein support rods 2 are arranged at four corners of the upper surface of the boiler body 1, a support plate 3 is arranged above the support rods 2, two waste heat recovery tanks 4 are symmetrically arranged above the support plate 3, steam pipes 5 are arranged inside the waste heat recovery tanks 4, the lower ends of the two steam pipes 5 penetrate through the bottoms of the waste heat recovery tanks 4 and the back of the support plate 3 and are commonly connected with a three-way connection pipe 6, the upper ends of the steam pipes 5 extend to the outside of the waste heat recovery tanks 4, a fan 8 is arranged in the middle of the top of the boiler body 1, the air inlet of the fan 8 is communicated with the boiler body 1 through a pipeline, the air outlet of the fan 8 is communicated with the three-way connection pipe 6, a water pump 18 is arranged above the waste heat recovery tanks 4, the input end of the water pump 18 is communicated with an external water source, the output end of the water pump 18 is connected with a water inlet pipe 15, a water spray disc 17 is connected below the water inlet pipe 15, a plurality of spray heads 19 are arranged at the bottom of the water spray disc 17, and the bottom of the waste heat recovery tank 4 is communicated with the boiler body 1 through a drain pipe 20; the air blower 8 and the water pump 18 are both electrically connected with the PLC; by arranging the spray head 19, cold water is uniformly contacted with the steam pipe 5, and the heat energy recovery efficiency is improved; the utility model has simple operation and strong practicability, the high-temperature flue gas generated in the boiler body enters the waste heat recovery tank to heat the water in the waste heat recovery tank, and the heated water flows back to the boiler body to be used again, thereby greatly reducing the use of fuel, further reducing the economic cost of steel production and being worth popularizing and using.
Specifically, a flow control device 16 is arranged on the water inlet pipe 15, and the flow control device 16 is arranged as a proportional control valve; the drain pipe 20 is provided with a second valve 21, and the flow control device 16 and the second valve 21 are electrically connected with the PLC controller.
A first valve 7 is arranged at one end, close to the three-way connecting pipe 6, of the steam pipe 5, a temperature sensor 25 is arranged at one end, close to the exhaust port, of the steam pipe 5, and both the first valve 7 and the temperature sensor 25 are electrically connected with the PLC; the temperature sensor 25 can monitor the steam temperature after heat exchange in real time, and the PLC controller controls the flow control device 16 to regulate the water flow; the flow direction of the high-temperature flue gas can be controlled by arranging the first valve 7, so that the two waste heat recovery tanks 4 can be independently used and can also be simultaneously used, and the selectivity is high.
As shown in fig. 3, a filter assembly is arranged on an air inlet pipeline of the fan 8, the filter assembly includes a first connecting pipe 9, the first connecting pipe 9 is communicated with the boiler body 1, a threaded sleeve 10 is connected to the outer surface of the first connecting pipe 9 through a thread, a fixed cylinder 11 is arranged on the right side of the first connecting pipe 9, a filter screen 13 is installed inside the fixed cylinder 11, a threaded pipe 12 is connected to the right side of the fixed cylinder 11 through a thread, a second connecting pipe 14 is connected to the right side of the threaded pipe 12, and the second connecting pipe 14 is communicated with the fan 8; the filter screen 13 is arranged, so that the gray matter in the flue gas can be filtered, the blockage of an air inlet pipeline is avoided, the damage of dust to the fan 8 is reduced, and the environmental pollution is reduced; through being provided with threaded sleeve 10, threaded sleeve 10 and 9 threaded connection of first connecting pipe, a fixed section of thick bamboo 11 and screwed pipe 12 threaded connection make a fixed section of thick bamboo 11 can tear open and change, can replace the inside swing joint's of a fixed section of thick bamboo 11 filter screen 13 from this, have reached the effect of the clearance of being convenient for, but reuse.
As shown in fig. 2, a stirring assembly is arranged inside the waste heat recovery tank 4, the stirring assembly includes a motor 22, the motor 22 is installed at the top of the waste heat recovery tank 4, an output shaft of the motor 22 is connected with a stirring shaft 23, a plurality of stirring blades 24 are uniformly arranged outside the stirring shaft 23, and the motor 22 is electrically connected with the PLC controller; can increase the mobility of water through setting up the stirring subassembly, improve the efficiency of heat recovery, two stirring subassemblies are by motor independent control, and when only 4 during operations of one of them waste heat recovery case, only need open corresponding stirring subassembly, the energy saving.
The steam pipe 5 is spiral, so that the contact area with cold water can be increased, the steam pipe 5 is fixed on the inner wall of the waste heat recovery tank 4, the stirring shaft 23 and the stirring blades 24 are arranged in the steam pipe 5, and the fluidity of the water body in the steam pipe 5 can be increased through the rotation of the stirring shaft 23 and the stirring blades 24.
As shown in fig. 4, the water spray disk 17 is circular, a circular hole is provided in the middle of the water spray disk 17, the stirring shaft 23 penetrates through the circular hole and then extends downward, and the plurality of nozzles 19 are uniformly arranged on the bottom surface of the water spray disk 17.
The using process of the utility model is as follows:
step one, a PLC controller controls to turn on a water pump 18 at the top of a left waste heat recovery tank 4, cold water enters a water spraying disc 17 through a water inlet pipe 15 and sprays water into the waste heat recovery tank 4 through a spray head 19; secondly, the PLC starts the fan 8, high-temperature flue gas in the boiler body 1 enters the filter assembly through the first connecting pipe 9, is filtered by the filter screen 13 and then enters the three-way connecting pipe 6 through the second connecting pipe 14 and the fan 8; step three, opening a first valve 7 on the left steam pipe 5, closing the first valve 7 on the right steam pipe 5, simultaneously opening a motor 22 at the top of the left waste heat recovery tank 4, driving a stirring shaft 23 and stirring blades 24 to rotate by the motor 22, accelerating the flow of water, improving the recovery efficiency of heat energy, and realizing the heat energy recovery by introducing high-temperature flue gas into the left waste heat recovery tank 4; step four, when the temperature sensor 25 on the steam pipe 5 detects that the temperature of the steam after heat exchange is overhigh, a signal is transmitted to the PLC, and the PLC controls the flow control device 16 to increase the water flow; step five, after the heat energy of the steam pipe 5 in the left waste heat recovery tank 4 is recovered, closing the corresponding first valve 7 and opening the first valve 7 on the steam pipe 5 on the right side, so that high-temperature flue gas can be introduced into the two waste heat recovery tanks 4 by switching, opening the water pump 18 and the motor 22 on the right side, spraying water into the waste heat recovery tank 4 on the right side and stirring, and continuously completing the recovery of the heat energy; step six, the second valve 21 is opened, and the hot water flows into the boiler body 1 through the water discharge pipe 20 to be reused, which greatly reduces the use of fuel, thereby greatly reducing the economic cost of steel production.
The boiler comprises a boiler body, a supporting rod, a supporting plate, a steam pipe, a three-way connecting pipe, a first valve, a fan, a first connecting pipe, a threaded sleeve, a fixed cylinder, a threaded pipe, a filter screen, a second connecting pipe, a water inlet pipe, a flow control device, a water spraying disc, a water pump, a spray head, a drain pipe, a second valve, a motor, a stirring shaft, a stirring blade, a temperature sensor, a PLC (programmable logic controller) and circuit connections of the PLC.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (7)
1. The utility model provides a waste heat recovery device for steel production, includes boiler body, its characterized in that: the boiler comprises a boiler body, a supporting plate, two waste heat recovery boxes, a fan, a water inlet, a water outlet, a water pump, a water inlet pipe, a water spray disc, a plurality of spray heads and a plurality of spray pipes, wherein the supporting plate is arranged above the supporting plate, the two waste heat recovery boxes are symmetrically arranged above the supporting plate, the steam pipes are arranged inside the waste heat recovery boxes, the lower ends of the two steam pipes penetrate through the bottoms of the waste heat recovery boxes and are commonly connected with a three-way connecting pipe behind the supporting plate, the upper ends of the steam pipes extend to the outside of the waste heat recovery boxes, the fan is arranged in the middle of the top of the boiler body, the air inlet of the fan is communicated with the boiler body through a pipeline, the air outlet of the fan is communicated with the three-way connecting pipe, the water pump is arranged above the waste heat recovery boxes, the input end of the water pump is communicated with an external water source, the output end of the water pump is connected with the water inlet pipe, the water spray disc is connected with the water spray discs, and the bottom of the water spray discs are provided with the plurality of spray heads, the bottom of the waste heat recovery tank is communicated with the boiler body through a drain pipe; the fan and the water pump are electrically connected with the PLC.
2. The waste heat recovery device for steel production according to claim 1, characterized in that: the water inlet pipe is provided with a flow control device which is set as a proportional control valve; the drain pipe is provided with a second valve, and the flow control device and the second valve are electrically connected with the PLC.
3. The waste heat recovery device for steel production according to claim 1, characterized in that: and a first valve is arranged at one end, close to the three-way connecting pipe, of the steam pipe, a temperature sensor is arranged at one end, close to the exhaust port, of the steam pipe, and the first valve and the temperature sensor are electrically connected with the PLC.
4. The waste heat recovery device for steel production according to claim 1, characterized in that: the utility model discloses a boiler, including boiler body, fan, air inlet pipe, filter component, first connecting pipe, fixed cylinder, fan, be provided with filter component on the air inlet pipe way of fan, filter component includes first connecting pipe, first connecting pipe with boiler body intercommunication, the surface threaded connection of first connecting pipe has the threaded sleeve, the right side of first connecting pipe is provided with fixed cylinder, the internally mounted of fixed cylinder has the filter screen, the right side threaded connection of fixed cylinder has the screwed pipe, the right side of screwed pipe is connected with the second connecting pipe, the second connecting pipe with the fan intercommunication.
5. The waste heat recovery device for steel production according to claim 1, characterized in that: the waste heat recovery case's inside is provided with the stirring subassembly, the stirring subassembly includes the motor, the motor is installed waste heat recovery case's top, the output shaft of motor has the (mixing) shaft, a plurality of stirring leaves have evenly been arranged in the outside of (mixing) shaft, the motor with the PLC controller electricity is connected.
6. The waste heat recovery device for steel production according to claim 5, characterized in that: the steam pipe is set to be spiral, the steam pipe is fixed on the inner wall of the waste heat recovery box, and the stirring shaft and the stirring blades are arranged in the steam pipe.
7. The waste heat recovery device for steel production according to claim 5, characterized in that: the water spray disc is circular, a round hole is formed in the middle of the water spray disc, the stirring shaft penetrates through the round hole and then extends downwards, and the plurality of spray heads are uniformly arranged on the bottom surface of the water spray disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121899962.7U CN216047593U (en) | 2021-08-14 | 2021-08-14 | Waste heat recovery device for steel production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121899962.7U CN216047593U (en) | 2021-08-14 | 2021-08-14 | Waste heat recovery device for steel production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216047593U true CN216047593U (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121899962.7U Active CN216047593U (en) | 2021-08-14 | 2021-08-14 | Waste heat recovery device for steel production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216047593U (en) |
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2021
- 2021-08-14 CN CN202121899962.7U patent/CN216047593U/en active Active
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