CN104373953B - A kind of intelligent combustion system using restriction orifice - Google Patents
A kind of intelligent combustion system using restriction orifice Download PDFInfo
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- CN104373953B CN104373953B CN201410646192.3A CN201410646192A CN104373953B CN 104373953 B CN104373953 B CN 104373953B CN 201410646192 A CN201410646192 A CN 201410646192A CN 104373953 B CN104373953 B CN 104373953B
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- restriction orifice
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 239000003034 coal gas Substances 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 31
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000010926 purge Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 239000000567 combustion gas Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Landscapes
- Feeding And Controlling Fuel (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The present invention provides a kind of intelligent combustion system using restriction orifice, the system is provided with heat-treatment furnace, the heat-treatment furnace is provided with burner, the pipeline of the burner both sides is provided with restriction orifice, the pipeline includes blast main, main gas pipe road, igniting air pipeline, gas for ignition pipeline, it is correspondingly arranged on primary air restriction orifice, main coal gas restriction orifice, igniting air restriction orifice, gas for ignition restriction orifice respectively, the blast main is connected by air cock reversal valve with exhaust piping.The present invention is that restriction orifice is applied to heat-treatment furnace combustion system for the first time, and the implementation of this programme greatly reduces construction cost, material cost, and ensureing realizes combustion system intelligence while combustion system stable operation is adjusted.
Description
Technical field
The present invention relates to a kind of combustion systems including the huge more heat-treatment furnace of number of burners, are answered more particularly, to one kind
The intelligent combustion system of hand valve is replaced with restriction orifice.
Background technology
Restriction orifice as restricting element, due to simple in structure, easy processing, manufacturing cost it is low, easy for installation etc. excellent
Point carrys out limited flow rate instead of regulating valve using restriction orifice or reduces pressure, it will significantly under the premise of meeting technological requirement
Ground reduces investment and operation maintenance cost, therefore has been widely used in process unit in foreign countries, the safe operation to device
It plays an important role.However, the application of restriction orifice is also not enough in current process unit at home, exist compared with external
Gap.In place of needing limited flow rate or reducing pressure, regulating valve is mostly used greatly to realize.The flow of fluid is only in some places
It is required that without adjusting in the range of being limited to a certain regulation, and it is also not high to the accuracy requirement of its flow, completely may be used
It is replaced with using restriction orifice.Therefore, it is necessary to fully realize restriction orifice in the design of process unit, pay attention to
The application of restriction orifice.
Invention content
It is the present invention provides a kind of intelligent combustion system for replacing hand valve using restriction orifice, number of burners is huge more
Primary air, main combustion gas in heat-treatment furnace, igniting air, gas for ignition mouth before manual modulation valve simple structure metering hole
Plate is replaced, and ensures that the main combustion gas of single stage burners, primary air, igniting combustion gas, igniting air mass flow are uniform, compared with common valve
It is easy for installation to greatly save construction cost.It is described that its technical solution is as follows：
A kind of intelligent combustion system using restriction orifice, the system are provided with heat-treatment furnace, and the heat-treatment furnace is set
It is equipped with burner, the pipeline of the burner both sides is provided with restriction orifice, and the pipeline includes blast main, main gas pipe
Road, igniting air pipeline, gas for ignition pipeline, are correspondingly arranged on primary air restriction orifice, main coal gas restriction orifice, igniting respectively
Air restriction orifice, gas for ignition restriction orifice, the blast main are connected by air cock reversal valve with exhaust piping
It connects.
The restriction orifice is arranged between the flange of pipeline, and the outer diameter of the restriction orifice is slightly larger than the flange of its both sides
Outer diameter.
The restriction orifice is general steel sheet, and cost is extremely low, and material cost is greatly saved compared to common valve.Institute
Restriction orifice is stated to fix by the bolt of two side flanges.The restriction orifice is discount vibram outlet concentric orifice orifice plate.
The main gas pipe road and gas for ignition pipeline are provided with fast cut valve, and the fast cut valve is located at main coal gas restriction orifice
With the outside of gas for ignition restriction orifice, burner is reached by restriction orifice for controlling gas.
The main gas pipe road and exhaust piping are both provided with flow control valve.
The both sides that the main gas pipe road is located at heat-treatment furnace are connected with nitrogen purge pipe, and the nitrogen purge pipe is set
It is equipped with fast cut valve.
The intelligent combustion system that hand valve is replaced using restriction orifice is made needed for single burner of identical bringing-up section
Combustion gas, air mass flow it is equal, ensure system stablize；Mouth remote holder valve is replaced using restriction orifice, guarantee meets heating process
Construction cost, material cost is greatly saved simultaneously；And a variety of adjustings can be taken according to actual needs in process of production
The measure of thermic load realizes intelligent adjusting.
Description of the drawings
Fig. 1 is the schematic diagram of the intelligent combustion system provided by the invention using restriction orifice；
Fig. 2 is the specific implementation mode schematic diagram of restriction orifice in this intelligent combustion system；
Fig. 3 is the side view of Fig. 2.
Specific implementation mode
The intelligent combustion system of the present invention that hand valve is replaced using restriction orifice, Major Systems device such as Fig. 1 institutes
Show, distinguish different pipe-line systems with different lines in Fig. 1, the pipeline includes blast main 1, main gas pipe
Road 2, igniting air pipeline 4, gas for ignition pipeline 3, the blast main 1 pass through air cock reversal valve 51 and exhaust piping
5 are connected, and the main gas pipe road 2 and exhaust piping 5 are both provided with flow control valve.Other than the device marked in system,
Remaining main device includes：Main coal gas restriction orifice 11, primary air restriction orifice 21, gas for ignition restriction orifice 31, igniting are empty
Gas restriction orifice 41.
The burner both sides in heat-treatment furnace 9, four pipelines of setting, hithermost is the restriction orifice of each pipeline,
Secondary is fast cut valve 7, and the both sides that heat-treatment furnace 9 is located in main gas pipe road 2 are connected with nitrogen purge pipe 6, the nitrogen purging
Pipeline 6 is provided with fast cut valve 7.
As shown in Figures 2 and 3, the restriction orifice puts discount vibram outlet restriction orifice using discount vibram outlet concentric orifice orifice plate
It sets between both sides flange 10, is conducive to the installation and dismounting of restriction orifice in this way；Ensure the outer diameter of restriction orifice as possible simultaneously
It is fixed by the bolt 12 of flange 10 slightly larger than 10 outer diameter of flange, the leakproofness that ensure that pipeline while keeps restriction orifice firm
It is securely fixed.This covering device performance is stablized, and installation is succinct, and cheap any engineering cost of hardly browband of constructing greatlys save cost.
Present system as shown in Figure 1 realizes the complete replacement of manual modulation valve before restriction orifice lip-syncing, and fluid flows through
It will produce pressure drop when restriction orifice, be elected to fixed limit flowing plate aperture, when other stable conditions, pass through the flow and metering hole of metering hole
Pressure difference before and after plate it is square directly proportional, by flow increase with the increase of pressure drop, the pressure after orifice plate reaches
Its critical pressure, flow will no longer change with the pressure drop of orifice plate, that is, have the function that current limliting, described to be replaced with restriction orifice
The restriction orifice that the intelligent combustion system of hand-off valve is related to is discount vibram outlet concentric orifice orifice plate, and specific implementation principle is as follows：
When choosing restriction orifice, go out total gas quantity of the bringing-up section according to the calculation of Heat Load of current bringing-up section first,
The gas quantity V needed for every burner is calculated again.Then it first estimates restriction orifice aperture d, and then calculates restriction orifice pressure
Poor Δ P.Finally, whether inverse pressure drop meets the effect of current limliting, after making restriction orifice as possible when choosing throttle orifice orifice aperture d
Pressure P2 be equal to and critical pressure Pc or be slightly less than critical pressure Pc, can not only have the function that current limliting in this way and ensured again using limiting
The phenomenon that pipeline of discharge orifice plate is not in choke plug flow.
The intelligent combustion system that hand valve is replaced using restriction orifice, in actual production operational process if necessary
The thermic load of single hop is adjusted.Coal gas fast cut valve drops to turn off the method for corresponding burner before cut-out mouth may be used
The thermic load of low corresponding bringing-up section；Corresponding heating can also be changed by adjusting the pressure of single hop gas main, air header
The coal gas of integral burner of section, the mode of air mass flow adjust thermic load (flow of dielectric gas and corresponding medium manifold
Pressure it is directly proportional).
Above disclosed is only presently preferred embodiments of the present invention, cannot limit the right of the present invention with this certainly
Range, therefore according to equivalence changes made by scope of the present invention patent, still belong to protection scope of the present invention.
Claims (4)
1. a kind of intelligent combustion system using restriction orifice, it is characterised in that：The system is provided with heat-treatment furnace, the heat
Treatment furnace is provided with burner, and the pipelines of the burner both sides is provided with restriction orifice, the pipeline include blast main,
Main gas pipe road, igniting air pipeline, gas for ignition pipeline, are correspondingly arranged on primary air restriction orifice, main coal gas current limliting respectively
Orifice plate, igniting air restriction orifice, gas for ignition restriction orifice, when choosing restriction orifice, first according to the heat of current bringing-up section
Load gauge calculates total gas quantity of the bringing-up section, then calculates the gas quantity V and restriction orifice aperture d needed for every burner,
And then restriction orifice pressure differential deltap P is calculated, finally, whether inverse pressure drop meets the effect of current limliting, when choosing restriction orifice aperture d
The pressure P2 after restriction orifice is set to be equal to critical pressure Pc or be slightly less than critical pressure Pc, the blast main passes through air
Rotary plug reversing valve is connected with exhaust piping, and the main gas pipe road and gas for ignition pipeline are provided with fast cut valve, described to cut soon
Valve is located at the outside of main coal gas restriction orifice and gas for ignition restriction orifice, burns for controlling gas and being reached by restriction orifice
Device, the main gas pipe road and exhaust piping are both provided with flow control valve, and the restriction orifice is discount vibram outlet concentric orifice orifice plate,
The both sides that the main gas pipe road is located at heat-treatment furnace are connected with nitrogen purge pipe, and the nitrogen purge pipe is provided with cuts soon
Valve.
2. the intelligent combustion system according to claim 1 using restriction orifice, it is characterised in that：The restriction orifice is set
It sets between the flange of pipeline, the outer diameter of the restriction orifice is slightly larger than the flange outer diameter of its both sides.
3. the intelligent combustion system according to claim 1 using restriction orifice, it is characterised in that：The restriction orifice is
General steel sheet.
4. the intelligent combustion system according to claim 1 using restriction orifice, it is characterised in that：The restriction orifice is logical
The bolt for crossing two side flanges is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410646192.3A CN104373953B (en) | 2014-11-14 | 2014-11-14 | A kind of intelligent combustion system using restriction orifice |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410646192.3A CN104373953B (en) | 2014-11-14 | 2014-11-14 | A kind of intelligent combustion system using restriction orifice |
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| Publication Number | Publication Date |
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| CN104373953A CN104373953A (en) | 2015-02-25 |
| CN104373953B true CN104373953B (en) | 2018-09-07 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964283A (en) * | 2015-07-07 | 2015-10-07 | 北京神雾环境能源科技集团股份有限公司 | Radiant tube regenerative type combustion system |
| CN106051747A (en) * | 2016-07-27 | 2016-10-26 | 北京神雾环境能源科技集团股份有限公司 | Heat accumulation type oxygen-enriched combustion method and device |
| JP6518830B1 (en) * | 2018-08-31 | 2019-05-22 | Ｐｒｉｍｅｔａｌｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｊａｐａｎ株式会社 | Control device for combustion equipment, combustion equipment system provided with the same, and operation method of combustion equipment |
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| CN202813374U (en) * | 2012-08-06 | 2013-03-20 | 闻喜县白玉矿业有限公司 | Magnesium reduction furnace combustion system |
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| CN204438178U (en) * | 2014-11-14 | 2015-07-01 | 北京神雾环境能源科技集团股份有限公司 | A kind of intelligent combustion system applying restriction orifice |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4340355A (en) * | 1980-05-05 | 1982-07-20 | Honeywell Inc. | Furnace control using induced draft blower, exhaust gas flow rate sensing and density compensation |
| CN2179962Y (en) * | 1992-10-03 | 1994-10-19 | 诚稳企业有限公司 | Continuous circulating heat treating furnace |
| CN1180827A (en) * | 1996-10-11 | 1998-05-06 | Demag意大利工厂股份公司 | Furnace for processes and treatments in sub-stoichiometric atmosphere |
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| CN104373953A (en) | 2015-02-25 |
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Address after: 102200 Beijing City, Changping District science and Technology Park Chang Huai Lu No. 155 Applicant after: Shenwu Technology Group Co.,Ltd. Address before: 102200 Beijing city Changping District Machi Town cow Road No. 18 Applicant before: BEIJING SHENWU ENVIRONMENT AND ENERGY TECHNOLOGY Co.,Ltd. |
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