CN213476025U - Hot-blast stove heat supply system capable of recycling waste heat - Google Patents
Hot-blast stove heat supply system capable of recycling waste heat Download PDFInfo
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- CN213476025U CN213476025U CN202022305879.4U CN202022305879U CN213476025U CN 213476025 U CN213476025 U CN 213476025U CN 202022305879 U CN202022305879 U CN 202022305879U CN 213476025 U CN213476025 U CN 213476025U
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Abstract
The utility model discloses a hot blast stove heating system capable of recycling waste heat, which comprises a blower, a hot blast stove, a blast furnace, a hot air pipeline and a cold air main pipeline, wherein the hot air pipeline comprises a hot air main pipeline and a waste heat air recycling pipeline; the air blower is connected with the cold air main pipeline, the hot air furnace is connected with the hot air main pipeline, the blast furnace is used for conveying high hot air, and the hot air furnace is connected with the waste heat air recovery pipeline to convey waste heat air into the cold air main pipeline. The utility model discloses parallel connection has gone up the waste heat wind recovery pipeline of taking the valve on the hot air outlet of hot-blast furnace, with remaining hot-blast in the hot-blast furnace send into the hot-blast furnace that is in the air supply stage through waste heat wind recovery pipeline and cold wind trunk line to improve the cold wind temperature, realized the recycle to waste gas in the hot-blast furnace, avoided the waste of the energy.
Description
Technical Field
The utility model relates to a smelting equipment field especially relates to a hot-blast furnace heating system that can carry out waste heat recovery.
Background
The hot blast stove is a device for heating and blasting a blast furnace, and is one of main matched devices of the blast furnace in an iron works. The heat accumulating type checker brick hot blast stove adopts the most form, and the working principle is that coal gas is firstly combusted, the checker bricks of a heat accumulating chamber are heated by the generated smoke, and then cold air is conveyed into a blast furnace after being heated by the hot checker bricks. The hot blast stove is limited by the working principle and cannot continuously output high hot air. The working cycle of the hot blast stove is divided into a combustion period and an air supply period, wherein the combustion period is greater than the air supply period. In order to realize continuous air supply to the blast furnace, at least three hot blast stoves are configured for each blast furnace to work alternately, and the operation mode of the three hot blast stoves is 'two burning and one feeding'. When the hot blast stove is changed, when a hot blast valve of the hot blast stove for newly supplying air is not completely opened, the hot blast stove for originally supplying air still needs to keep supplying air, and the air supply of the hot blast stove for originally supplying air is stopped until the hot blast stove for newly supplying air reaches a normal state, and the air supply period is changed into a combustion period.
The existing hot blast stove heating system needs to diffuse the waste gas of the original air supply hot blast stove in the process of changing the air supply period of the hot blast stove into the combustion period, and in the discharging process, the pressure is reduced from 0.43MPa to zero, so that great noise and air pressure loss are generated, and huge energy waste is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a hot-blast furnace heating system that can carry out waste heat recovery utilizes solves current hot-blast furnace heating system, changes the in-process of burning phase into by the air supply phase at the hot-blast furnace, the extravagant problem of the energy that causes when diffusing the processing to the hot-blast furnace waste gas of former air supply.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model designs a hot blast stove heating system capable of recycling waste heat, which comprises a blower, a hot blast stove, a blast furnace, a hot air pipeline and a cold air main pipeline, wherein the hot air pipeline comprises a hot air main pipeline and a waste heat air recycling pipeline; the air blower is connected with the cold air main pipeline, the hot air furnace is connected with the hot air main pipeline, the blast furnace is used for conveying high hot air, and the hot air furnace is connected with the waste heat air recovery pipeline to convey waste heat air into the cold air main pipeline.
Furthermore, the hot blast stoves are at least three, and all the hot blast stoves are connected in parallel to the hot blast main pipeline, the waste heat wind recovery pipeline and the cold wind main pipeline.
Furthermore, a cold air branch pipeline is arranged between the cold air main pipeline and the hot blast stove, and a cold air valve is arranged on the cold air branch pipeline.
Furthermore, hot air branch pipelines are connected between the hot air furnace and the hot air main pipeline and between the hot air furnace and the waste heat recovery pipeline, and a hot air valve and a waste heat air valve are respectively arranged on the hot air branch pipelines.
Further, a negative pressure machine is arranged on the waste heat recovery pipeline, and the negative pressure machine pumps out air of the hot blast stove and then sends the air into the cold air main pipeline.
Furthermore, the hot blast stove comprises a first hot blast stove, a second hot blast stove and a third hot blast stove, the cold air valve comprises a first cold air valve, a second cold air valve and a third cold air valve, the waste heat air valve comprises a first waste heat air valve, a second waste heat air valve and a third waste heat air valve, and the hot blast valve comprises a first hot blast valve, a second hot blast valve and a third hot blast valve; and the cold air valve, the waste heat air valve and the hot air valve sequentially control the cold air, the waste heat air and the hot air of the first hot air furnace, the second hot air furnace and the third hot air furnace.
Compared with the prior art, the utility model discloses a beneficial technological effect:
the utility model discloses parallel connection has gone up the waste heat wind recovery pipeline of taking the valve on the hot air outlet of hot-blast furnace, with remaining hot-blast in the hot-blast furnace send into the hot-blast furnace that is in the air supply stage through waste heat wind recovery pipeline and cold wind trunk line to improve the cold wind temperature, realized the recycle to waste gas in the hot-blast furnace, avoided the waste of the energy.
Drawings
The present invention will be further explained with reference to the following description of the drawings.
FIG. 1 is a schematic view of a heating system of a hot blast stove capable of recycling waste heat;
description of reference numerals: 1. a blower; 2. a negative pressure machine; 3. a hot blast stove; 31. a first hot blast stove; 32. a second hot blast stove; 33. a third hot blast stove; 4. a cold air valve; 41. a first cold air valve; 42. a second cold air valve; 43. a third cold air valve; 5. a waste heat air valve; 51. a first waste heat air valve; 52. a second waste heat air valve; 53. a third waste heat air valve; 6. a hot air valve; 61. a first hot air valve; 62. a second hot air valve; 63. a third hot air valve; 7. a blast furnace; 8. a hot air duct; 81. a hot air main pipeline; 8. a residual hot air recovery pipeline; 9. a cold air main pipeline.
Detailed Description
As shown in fig. 1, a heating system of a hot blast stove capable of recycling waste heat includes a blower 1, a hot blast stove 3, a blast furnace 7, a hot air duct 8 and a cold air main duct 9, wherein the hot air duct 8 includes a hot air main duct 81 and a waste heat air recycling duct 82; the air blower 1 is connected with a cold air main pipeline 9 to convey cold air for the hot blast stove 3, the hot blast stove 3 is connected with a hot air main pipeline 81 to convey high hot air for the blast furnace 7, and the hot blast stove 3 is connected with a waste heat air recovery pipeline 82 to convey waste heat air into the cold air main pipeline 9.
The hot blast stoves 3 are at least three, and all the hot blast stoves 3 are connected in parallel to the hot blast main pipe 81, the waste heat wind recovery pipe 82 and the cold wind main pipe 9.
A cold air branch pipeline is arranged between the cold air main pipeline 9 and the hot blast stove 3, and a cold air valve 4 is arranged on the hot blast branch pipeline.
Hot air branch pipelines are connected between the hot air furnace 3 and the hot air main pipeline 81 and between the hot air furnace 3 and the waste heat recovery pipeline 82, and a hot air valve 6 and a waste heat air valve 5 are respectively arranged on the hot air branch pipelines.
The waste heat recovery pipeline 82 is provided with a negative pressure machine 2, and the negative pressure machine 2 pumps out air of the hot blast stove 3 and then sends the air into the cold air main pipeline 9.
The hot blast stove 3 comprises a first hot blast stove 31, a second hot blast stove 32 and a third hot blast stove 33, the cold air valve 4 comprises a first cold air valve 41, a second cold air valve 42 and a third cold air valve 43, the residual heat air valve 5 comprises a first residual heat air valve 51, a second residual heat air valve 52 and a third residual heat air valve 53, and the hot blast valve 6 comprises a first hot blast valve 61, a second hot blast valve 62 and a third hot blast valve 63; the cold air valve 4, the residual heat air valve 5 and the hot air valve 6 sequentially control cold air, residual heat air and hot air of the first hot air furnace 31, the second hot air furnace 32 and the third hot air furnace 33.
The action process of the utility model is as follows:
first, when the first hot blast stove 31 is in the blowing phase, the second and third hot blast stoves 32, 33 are in the combustion phase, and the second hot blast stove 32 is in the second half of the combustion phase and the third hot blast stove 33 is in the first half of the combustion phase. At this time, the second cold air valve 42, the third cold air valve 43, the first waste heat air valve 51, the second waste heat air valve 52, the third waste heat air valve 53, the second hot air valve 62 and the third hot air valve 63 are all closed, and the first cold air valve 41 and the first hot air valve 61 are opened.
When the blowing phase of the first stove 31 is about to end, the combustion phase of the second stove 32 is completed and the third stove 33 enters the second half of the combustion phase. The valve changes at this time that the first hot air valve 61 is gradually closed, the first waste heat air valve 51, the second cold air valve 42 and the second hot air valve 62 are gradually opened, and the negative pressure machine 2 is opened. The residual pressure and hot air in the first hot blast stove 31 are sent to the cold air main pipe 9 by the negative pressure machine 2, and the heated cold air enters the second hot blast stove 32 and is sent to the blast furnace 7 after being heated.
When the pressure and temperature in the first hot blast stove 31 are gradually close to the pressure and temperature of the cold air fed by the air blower 1, the supercharging efficiency and the heat exchange efficiency are gradually reduced. When the pressure value and the temperature value in the first hot blast stove 31 reach the set values, the first cold blast valve 41, the first waste heat blast valve 51 and the negative pressure machine 2 are respectively closed, and the first hot blast stove 31 enters the upper half section of the combustion stage along with the first cold blast valve. The three hot blast stoves 3 are alternately operated according to the working process, and the continuous heat supply to the blast furnace is realized circularly and alternately.
Because the cold air fed by the air blower 1 is pressurized and heated by the residual pressure of the first hot blast stove 31 and the hot blast air respectively, a certain pressure and temperature exist before the cold air is fed into the second hot blast stove 32, and the energy required for the cold air with the same quality to reach the preset pressure and temperature is reduced in the subsequent pressurizing and heating process, so that the energy-saving effect is realized.
The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.
Claims (6)
1. The utility model provides a hot-blast furnace heating system that can carry out waste heat recovery utilizes which characterized in that: the device comprises a blower (1), a hot blast stove (3), a blast furnace (7), a hot blast pipeline (8) and a cold blast main pipeline (9), wherein the hot blast pipeline (8) comprises a hot blast main pipeline (81) and a waste heat wind recovery pipeline (82); air-blower (1) is connected cold wind trunk line (9) does hot-blast furnace (3) carry cold wind, hot-blast furnace (3) are connected hot-blast trunk line (81) do blast furnace (7) carry high-hot-blast, hot-blast furnace (3) are connected surplus hot-blast recovery pipeline (82) carry the waste heat wind in cold wind trunk line (9).
2. The hot blast stove heating system capable of recycling waste heat according to claim 1, characterized in that: for guaranteeing the continuous heat supply to blast furnace (7), combine the time length contrast in combustion period, air supply period, hot-blast furnace (3) are provided with three at least, hot-blast furnace (3) insert parallelly connected hot-blast trunk line (81), waste heat wind recovery pipeline (82) and cold wind trunk line (9).
3. The hot blast stove heating system capable of recycling waste heat according to claim 2, characterized in that: a cold air branch pipeline is arranged between the cold air main pipeline (9) and the hot blast stove (3), and a cold air valve (4) is arranged on the cold air branch pipeline.
4. The hot blast stove heating system capable of recycling waste heat according to claim 3, characterized in that: hot-blast furnace (3) with between hot-blast main pipe way (81) hot-blast furnace (3) with between surplus hot-blast recovery pipeline (82), all be connected with hot-blast branch pipeline, two be provided with hot-blast valve (6) and surplus hot-blast valve (5) on the hot-blast branch pipeline respectively.
5. The hot blast stove heating system capable of recycling waste heat according to claim 1, characterized in that: and a negative pressure machine (2) is arranged on the residual hot air recovery pipeline (82), and the negative pressure machine (2) pumps the air of the hot blast stove (3) out and then feeds the air into the cold air main pipeline (9).
6. The hot blast stove heating system capable of recycling waste heat according to claim 4, characterized in that: the hot air furnace (3) comprises a first hot air furnace (31), a second hot air furnace (32) and a third hot air furnace (33), the cold air valve (4) comprises a first cold air valve (41), a second cold air valve (42) and a third cold air valve (43), the waste heat air valve (5) comprises a first waste heat air valve (51), a second waste heat air valve (52) and a third waste heat air valve (53), and the hot air valve (6) comprises a first hot air valve (61), a second hot air valve (62) and a third hot air valve (63); and the cold air valve (4), the residual heat air valve (5) and the hot air valve (6) sequentially control cold air, residual heat air and hot air of the first hot air furnace (31), the second hot air furnace (32) and the third hot air furnace (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022305879.4U CN213476025U (en) | 2020-10-16 | 2020-10-16 | Hot-blast stove heat supply system capable of recycling waste heat |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022305879.4U CN213476025U (en) | 2020-10-16 | 2020-10-16 | Hot-blast stove heat supply system capable of recycling waste heat |
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| CN213476025U true CN213476025U (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022305879.4U Active CN213476025U (en) | 2020-10-16 | 2020-10-16 | Hot-blast stove heat supply system capable of recycling waste heat |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115094179A (en) * | 2022-07-13 | 2022-09-23 | 中冶京诚工程技术有限公司 | Hot blast stove furnace change waste gas recycling system and method |
| CN115838843A (en) * | 2023-02-20 | 2023-03-24 | 山西建龙实业有限公司 | Device and method for recovering residual hot air of hot blast stove |
-
2020
- 2020-10-16 CN CN202022305879.4U patent/CN213476025U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115094179A (en) * | 2022-07-13 | 2022-09-23 | 中冶京诚工程技术有限公司 | Hot blast stove furnace change waste gas recycling system and method |
| CN115094179B (en) * | 2022-07-13 | 2023-11-14 | 中冶京诚工程技术有限公司 | System and method for recycling waste gas generated during furnace changing of hot blast stove |
| CN115838843A (en) * | 2023-02-20 | 2023-03-24 | 山西建龙实业有限公司 | Device and method for recovering residual hot air of hot blast stove |
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