CN215162967U - Heat treatment annealing furnace - Google Patents
Heat treatment annealing furnace Download PDFInfo
- Publication number
- CN215162967U CN215162967U CN202121407859.6U CN202121407859U CN215162967U CN 215162967 U CN215162967 U CN 215162967U CN 202121407859 U CN202121407859 U CN 202121407859U CN 215162967 U CN215162967 U CN 215162967U
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- Prior art keywords
- pipe
- air inlet
- smoke exhaust
- air
- heat exchanger
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- 238000000137 annealing Methods 0.000 title claims abstract description 35
- 238000010438 heat treatment Methods 0.000 title claims abstract description 23
- 239000000779 smoke Substances 0.000 claims abstract description 45
- 238000002485 combustion reaction Methods 0.000 claims abstract description 17
- 238000007669 thermal treatment Methods 0.000 claims 1
- 239000002912 waste gas Substances 0.000 abstract description 9
- 238000001816 cooling Methods 0.000 abstract description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The utility model discloses a heat treatment annealing furnace, which comprises an air inlet system, a combustion system and a smoke exhaust system; the air inlet system comprises a blower, an air supply pipe, a first air inlet pipe, a second air inlet pipe and a heat exchanger; one end of the blast pipe is connected with the blower, and the other end of the blast pipe is connected with the first air inlet pipe; the first air inlet pipe is connected with an inlet of a pipe pass of the heat exchanger through a first pneumatic butterfly valve; the outlet of the heat exchanger tube pass is connected with an air tube of the combustion system; one end of the second air inlet pipe is communicated with the air supply pipe through a second pneumatic butterfly valve, and the other end of the second air inlet pipe is communicated with an air pipe of the combustion system through a third pneumatic butterfly valve; the smoke exhaust system comprises a first smoke exhaust pipe and a second smoke exhaust pipe, wherein two ends of the first smoke exhaust pipe are respectively connected with the furnace chamber and a shell pass inlet of the heat exchanger, and a shell pass outlet of the heat exchanger is connected with the second smoke exhaust pipe. The heat treatment annealing furnace of the utility model can realize the rapid cooling in the furnace without additionally adding equipment; the heat exchanger makes full use of the heat energy in the waste gas to heat the cold air, thereby saving energy.
Description
Technical Field
The utility model belongs to the technical field of the heating furnace, especially, relate to a heat treatment annealing stove.
Background
The heat treatment annealing furnace is used for annealing large carbon steel and alloy steel parts. After annealing of some special metal materials, rapid cooling is required in a short time, for example, 100 ℃ per hour is required for some special metal materials. Because the heat preservation effect of annealing stove is all better, and the requirement that natural cooling is difficult to reach cooling speed, need not additionally to increase equipment in the prior art and come the interior cooling of stove, the operation is also inconvenient.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: provides a heat treatment annealing furnace, which can conveniently cool the interior of the heat treatment annealing furnace and does not need additional equipment.
The technical scheme of the utility model is that:
a heat treatment annealing furnace comprises an air inlet system, a combustion system and a smoke exhaust system; the air inlet system comprises a blower, an air supply pipe, a first air inlet pipe, a second air inlet pipe and a heat exchanger; one end of the blast pipe is connected with the blower, and the other end of the blast pipe is connected with the first air inlet pipe; the first air inlet pipe is connected with an inlet of a pipe pass of the heat exchanger through a first pneumatic butterfly valve; the outlet of the heat exchanger tube side is connected with an air tube of the combustion system; one end of the second air inlet pipe is communicated with the air supply pipe through a second pneumatic butterfly valve, and the other end of the second air inlet pipe is communicated with an air pipe of the combustion system through a third pneumatic butterfly valve; the smoke exhaust system comprises a first smoke exhaust pipe and a second smoke exhaust pipe, one end of the first smoke exhaust pipe is connected with the furnace chamber of the heat treatment annealing furnace, the other end of the first smoke exhaust pipe is connected with the shell side inlet of the heat exchanger, and the shell side outlet of the heat exchanger is connected with the second smoke exhaust pipe.
Preferably, the second smoke exhaust pipe is communicated with a smoke return pipe, and the smoke return pipe is communicated with the air supply pipe through an electric one-way valve.
Preferably, a cold air branch pipe is arranged on the first smoke exhaust pipe and is communicated with the air supply pipe through an electric valve.
The utility model has the advantages that:
the heat treatment annealing furnace of the utility model directly introduces cold air into the furnace cavity of the annealing furnace through the second air inlet pipe communicated with the blast pipe to cool the furnace cavity, and can realize rapid cooling in the furnace without additionally adding equipment; in addition, the heat exchanger is arranged to heat cold air by using waste heat in the waste gas discharged from the hearth, so that heat energy in the waste gas is fully utilized, and energy is saved.
Drawings
FIG. 1 is a front view of the internal structure of a heat treatment annealing furnace according to the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a left side view of fig. 1.
In the figure: 1. a blower; 2. an air supply pipe; 3. a first intake pipe; 4. a second intake pipe; 5. a heat exchanger; 6. a first pneumatic butterfly valve; 7. a second pneumatic butterfly valve; 8. a third pneumatic butterfly valve; 9. a first smoke exhaust pipe; 10. a second smoke exhaust pipe; 11. a flue gas return pipe; 12. an electric check valve; 13. a cold air branch pipe; 14. an electrically operated valve; 20. a hearth of the annealing furnace; 21. an air tube.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a front view of an internal structure of a heat treatment annealing furnace according to the present invention, fig. 2 is a plan view of fig. 1, and fig. 3 is a left side view of fig. 1. As shown in fig. 1, 2 and 3, the heat treatment annealing furnace of the present invention comprises an air inlet system, a combustion system and a smoke exhaust system; the air inlet system comprises a blower 1, an air supply pipe 2, a first air inlet pipe 3, a second air inlet pipe 4 and a heat exchanger 5; one end of the blast pipe 2 is connected with the blower 1, and the other end of the blast pipe is connected with the first air inlet pipe 3; the first air inlet pipe 3 is connected with an inlet of a pipe pass of the heat exchanger 5 through a first pneumatic butterfly valve 6; the outlet of the tube side of the heat exchanger 5 is connected with an air tube 21 of the combustion system; one end of the second air inlet pipe 4 is communicated with the air supply pipe 2 through a second pneumatic butterfly valve 7, and the other end of the second air inlet pipe is communicated with an air pipe 21 of the combustion system through a third pneumatic butterfly valve 8; the smoke exhaust system comprises a first smoke exhaust pipe 9 and a second smoke exhaust pipe 10, one end of the first smoke exhaust pipe 9 is connected with the furnace chamber 20 of the heat treatment annealing furnace, the other end of the first smoke exhaust pipe is connected with the shell pass inlet of the heat exchanger 5, and the shell pass outlet of the heat exchanger 5 is connected with the second smoke exhaust pipe 10.
The working principle is as follows:
when the heat treatment annealing furnace of the utility model carries out heating annealing, the second pneumatic butterfly valve 7 and the third pneumatic butterfly valve 8 are closed, and the first pneumatic butterfly valve 6 is opened. The air blower 1 is started, air enters the first air inlet pipe 3 through the air supply pipe 2, enters the pipe pass of the heat exchanger 5 through the first pneumatic butterfly valve 6, then enters the air pipe 21 of the combustion system to be mixed with gas to provide oxygen required by combustion, and the gas in the heat treatment annealing furnace is ignited to start heating work. The burnt furnace waste gas enters the first smoke exhaust pipe 9 from the inside of the hearth 20 of the annealing furnace, then enters the shell pass of the heat exchanger 5 to exchange heat with cold air in the tube pass of the heat exchanger 5, and the cold air is heated into hot air and then enters the combustion system, so that the temperature of the air before combustion is improved, and the energy is saved; and the cooled waste gas enters the second smoke exhaust pipe 10 from the shell pass outlet of the heat exchanger 5 and is exhausted, so that the high-temperature pollution to the atmosphere is reduced.
When the annealing is finished and the temperature in the furnace chamber 20 of the annealing furnace needs to be rapidly reduced, the second pneumatic butterfly valve 7 and the third pneumatic butterfly valve 8 are opened, the first pneumatic butterfly valve 6 is closed, the air blower 1 is opened, cold air flows through the second pneumatic butterfly valve 7 through the air supply pipe 2 and then enters the second air inlet pipe 4, then flows through the third pneumatic butterfly valve 8 and enters the air pipe 21 of the combustion system, the cold air enters the furnace chamber 20 of the annealing furnace through the ignited burner, the cold air is mixed with hot air in the furnace chamber 20 of the annealing furnace and then flows through the first smoke exhaust pipe 9, and then flows through the shell pass of the heat exchanger 5 and then enters the second smoke exhaust pipe 10 and is then exhausted, and the temperature in the furnace chamber 20 of the annealing furnace is reduced. The cold air continuously blown in continuously cools the furnace chamber 20 of the annealing furnace, and the temperature can be quickly cooled to the required value without additionally adding cooling equipment, so that the operation is convenient. The speed of cooling can be adjusted through the speed of adjusting the speed of blowing, and the size of wind speed can be adjusted through installing the converter on air-blower 1, and the converter also can directly realize automatic control with the temperature sensor interlock that sets up in the annealing stove.
Preferably, the second smoke exhaust pipe 10 is communicated with a smoke return pipe 11, and the smoke return pipe 11 is communicated with the blast pipe 2 through an electric one-way valve 12.
The flue gas return pipe 11 can blow the waste gas discharged from the second smoke exhaust pipe 10 into the air supply pipe 2, so that the unburned and complete fuel gas and heat in the waste gas can be recycled, and energy conservation and emission reduction are realized.
Preferably, the first smoke exhaust pipe 9 is provided with a cold air branch pipe 13, and the cold air branch pipe 13 is communicated with the blast pipe 2 through an electric valve 14. The first exhaust pipe 9 is provided with a cold air branch pipe 13 communicated with the blast pipe 2, and cold air can be guided into the first exhaust pipe 9 through the cold air branch pipe 13, so that the temperature of the discharged waste gas is reduced to some extent, and the heat exchanger 5 is prevented from being damaged by overhigh waste gas temperature.
It should be noted that the above-described technical features of the present invention may be combined with each other as long as they do not conflict with each other. In addition, the above embodiments are only some embodiments, not all embodiments, and all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention based on the embodiments of the present invention.
Claims (3)
1. A heat treatment annealing furnace comprises an air inlet system, a combustion system and a smoke exhaust system; the air inlet system is characterized by comprising a blower, an air supply pipe, a first air inlet pipe, a second air inlet pipe and a heat exchanger; one end of the blast pipe is connected with the blower, and the other end of the blast pipe is connected with the first air inlet pipe; the first air inlet pipe is connected with an inlet of a pipe pass of the heat exchanger through a first pneumatic butterfly valve; the outlet of the heat exchanger tube side is connected with an air tube of the combustion system; one end of the second air inlet pipe is communicated with the air supply pipe through a second pneumatic butterfly valve, and the other end of the second air inlet pipe is communicated with an air pipe of the combustion system through a third pneumatic butterfly valve; the smoke exhaust system comprises a first smoke exhaust pipe and a second smoke exhaust pipe, one end of the first smoke exhaust pipe is connected with the furnace chamber of the heat treatment annealing furnace, the other end of the first smoke exhaust pipe is connected with the shell side inlet of the heat exchanger, and the shell side outlet of the heat exchanger is connected with the second smoke exhaust pipe.
2. The thermal treatment annealing furnace according to claim 1, wherein the second smoke exhaust pipe is communicated with a smoke return pipe, and the smoke return pipe is communicated with the blast pipe through an electric one-way valve.
3. The heat treatment annealing furnace according to claim 1 wherein the first exhaust duct is provided with a cold blast branch duct which communicates with the blast duct through an electric valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121407859.6U CN215162967U (en) | 2021-06-24 | 2021-06-24 | Heat treatment annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121407859.6U CN215162967U (en) | 2021-06-24 | 2021-06-24 | Heat treatment annealing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215162967U true CN215162967U (en) | 2021-12-14 |
Family
ID=79382573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121407859.6U Active CN215162967U (en) | 2021-06-24 | 2021-06-24 | Heat treatment annealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215162967U (en) |
-
2021
- 2021-06-24 CN CN202121407859.6U patent/CN215162967U/en active Active
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