CN201713551U - Three-stage pressure reducing and balancing gas supplying device used for thermal treatment furnace - Google Patents
Three-stage pressure reducing and balancing gas supplying device used for thermal treatment furnace Download PDFInfo
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- CN201713551U CN201713551U CN2010201696474U CN201020169647U CN201713551U CN 201713551 U CN201713551 U CN 201713551U CN 2010201696474 U CN2010201696474 U CN 2010201696474U CN 201020169647 U CN201020169647 U CN 201020169647U CN 201713551 U CN201713551 U CN 201713551U
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- thermal treatment
- air
- balance
- heat treatment
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Abstract
The utility model provides a three-stage pressure reducing and balancing gas supplying device used for a thermal treatment furnace, which comprises a gas supply station, a main gas supply pipe, branch gas supply pipes of the thermal treatment furnace and a nozzle, wherein the main gas supply pipe is provided with a primary pressure regulating valve for completing primary pressure reduction and balance; each branch gas supply pipe of the thermal treatment furnace is provided with a secondary pressure regulating valve for completing secondary pressure reduction and balance; and the aperture of a throttling hole on the nozzle of the thermal treatment furnace is 7 to 10 millimeters for completing tertiary pressure reduction and balance. By adopting the three-stage pressure reducing and balancing device and controlling the pressure regulating valves, the gas flow is steady at the same valve position, thus leading to little change of temperature inside the thermal treatment furnace in the heating process, further reducing the thickness of scale, even avoiding scale, and finally reducing and even avoiding high-temperature pits.
Description
Technical field
The utility model relates to a kind of heat treatment furnace airing system that is used for the steel plate heat treated, relates in particular to a kind of three grades of decompression balance air feeders that are used for heat treatment furnace.
Background technology
At present, it is unrare to produce pit at plate of moderate thickness industry normalized steel plate, and it is more obvious to seem for fired heater.Pit is that surface of steel plate is part or successive sheet uneven surface, and is distributed as shape and differs the pit that varies in size.The generation of normalizing pit has not only increased worker's labour intensity, has also reduced the quality of steel plate, the rhythm that influence is produced.One of reason that pit produces be steel plate in heat-processed, oxidizing reaction at high temperature takes place with the oxygen in the furnace gas, carbonic acid gas, water etc. in the upper and lower surface of steel plate, forms iron scale.After steel plate was come out of the stove, the iron scale of upper and lower surface sticked to the steel plate upper and lower surface and can not come off, and after iron scale was cooled, its hardness was pressed in the steel plate in the aligning process greater than the hardness of hot steel plate, formed the upper and lower surface pit.Therefore, oxygen level is most important to the generation of controlled oxidation iron sheet in the strict control stove.In the prior art, heat treatment furnace is to mix by Sweet natural gas and combustion air, and the mode by naked light heats steel plate, and therefore in stove in during the amount of oxygen surplus, oxidizing reaction at high temperature takes place for unnecessary oxygen and steel plate, the generation iron scale.Usually,,, cause identical valve position gas flow to change greatly, cause the fluctuation of temperature in the stove bigger, be easier to produce the high temperature pit, had a strong impact on the performance of product generally at 120-200KPa because the pressure surge of Sweet natural gas main pipe line is bigger.The method of system pressure is by seeing that the firer in time adjusts valve position in the existing control stove, but operation easier is bigger, the operating skill of seeing the firer is had relatively high expectations, and effect is bad.
Therefore need provide a kind of new heat treatment furnace combustion air air feeder, can control the system pressure in the stove more accurately, amount of oxygen in the control stove makes the interior temperature of stove keep stable, reduces even prevent the generation of high temperature pit, improves the performance of product.
The utility model content
In view of this, the purpose of this utility model provides a kind of three grades of decompression equilibrators can effectively controlling system pressure balance and stability in the heat treatment furnace.The purpose of this utility model is achieved through the following technical solutions: a kind of three grades of decompression balance air feeders that are used for heat treatment furnace, comprise that supply station, main air-supply duct, heat treatment furnace divide air-supply duct and burner, the first class pressure variable valve is set on main air-supply duct, finishes one-level decompression balance; Divide at each heat treatment furnace the secondary pressure variable valve is set on the air-supply duct, finish the second depressurized balance; The aperture of the throttle orifice on the heat treatment furnace burner is set to 7～10mm, finishes three grades of decompression balances.
Further, first class pressure variable valve on the described main air-supply duct and/or thermal treatment divide the quantity of the secondary pressure variable valve on the air-supply duct to be at least one.
The beneficial effects of the utility model are: owing to adopted three grades of decompression equilibrators, by control to pressure regulator valve, can make under the identical valve position gas flow steady, simultaneously with the aperture of burner to be set to be 7～10mm, burner implication flow velocity degree in the heat treatment furnace is increased, and then flame is elongated, make the temperature in the heat treatment furnace more even, and then make in the heat-processed in the heat treatment furnace temperature variation little, thereby reduce the thickness of iron scale even avoid the generation of iron scale, finally reduce even prevent the generation of high temperature pit.
Other advantages of the present utility model, target and feature will be set forth in the following description, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can from practice of the present utility model, obtain instruction to investigating hereinafter.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, and accompanying drawing is a structural representation of the present utility model.
Embodiment
As shown in the figure, three grades of decompression balance air feeders that are used for heat treatment furnace of the present utility model comprise that supply station 1, main air-supply duct 2, heat treatment furnace divide air-supply duct 3 and burner 4, and first class pressure variable valve 5 is set on main air-supply duct, finish one-level decompression balance; Divide at each heat treatment furnace secondary pressure variable valve 6 is set on the air-supply duct, finish the second depressurized balance; The aperture of the throttle orifice on the heat treatment furnace burner is set to 7～10mm, finishes three grades of decompression balances.
Embodiment 1, and according to above-mentioned three grades of decompression balance air feeders that are used for heat treatment furnace, first class pressure variable valve 5 on the wherein main air-supply duct 2 and thermal treatment divide the secondary pressure variable valve 6 on the air-supply duct 3 all to be set to one, and the throttle orifice aperture of burner 4 is 7mm.
Embodiment 3, and according to above-mentioned three grades of decompression balance air feeders that are used for heat treatment furnace, first class pressure variable valve 5 on the wherein main air-supply duct 2 and thermal treatment divide the secondary pressure variable valve 6 on the air-supply duct 3 all to be set to one, and the throttle orifice aperture of burner 4 is 10mm.
In the heat-processed, cooperate by the adjusting to pressure regulator valve 5 and 6 as required, use the throttle orifice burner of small-bore, can realize that the air-flow in the heat treatment furnace is steady, homo(io)thermism finally reaches minimizing even prevents the purpose that the high temperature pit produces.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (2)
1. one kind is used for three grades of heat treatment furnace decompression balance air feeders, comprise that supply station (1), main air-supply duct (2), heat treatment furnace divide air-supply duct (3) and burner (4), it is characterized in that: first class pressure variable valve (5) is set on main air-supply duct (2), finishes one-level decompression balance; Divide at each heat treatment furnace secondary pressure variable valve (6) is set on the air-supply duct (3), finish the second depressurized balance; The aperture of the throttle orifice on the heat treatment furnace burner (4) is set to 7～10mm, finishes three grades of decompression balances.
2. three grades of decompression balance air feeders that are used for heat treatment furnace according to claim 1, it is characterized in that: first class pressure variable valve on the described main air-supply duct (2) and/or thermal treatment divide the quantity of the secondary pressure variable valve on the air-supply duct (3) to be at least one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201696474U CN201713551U (en) | 2010-04-23 | 2010-04-23 | Three-stage pressure reducing and balancing gas supplying device used for thermal treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201696474U CN201713551U (en) | 2010-04-23 | 2010-04-23 | Three-stage pressure reducing and balancing gas supplying device used for thermal treatment furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201713551U true CN201713551U (en) | 2011-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201696474U Expired - Fee Related CN201713551U (en) | 2010-04-23 | 2010-04-23 | Three-stage pressure reducing and balancing gas supplying device used for thermal treatment furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201713551U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442911A (en) * | 2016-10-17 | 2017-02-22 | 浙江大学苏州工业技术研究院 | Device for reducing measurement error of chemical oxygen demand of high brine waste water |
-
2010
- 2010-04-23 CN CN2010201696474U patent/CN201713551U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442911A (en) * | 2016-10-17 | 2017-02-22 | 浙江大学苏州工业技术研究院 | Device for reducing measurement error of chemical oxygen demand of high brine waste water |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110119 Termination date: 20140423 |