CN104373953A - Intelligent combustion system comprising restriction orifice plates - Google Patents
Intelligent combustion system comprising restriction orifice plates Download PDFInfo
- Publication number
- CN104373953A CN104373953A CN201410646192.3A CN201410646192A CN104373953A CN 104373953 A CN104373953 A CN 104373953A CN 201410646192 A CN201410646192 A CN 201410646192A CN 104373953 A CN104373953 A CN 104373953A
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- restriction orifice
- combustion system
- gas
- orifice
- main
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 34
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000003034 coal gas Substances 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 229910000831 Steel Inorganic materials 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
- 238000007669 thermal treatment Methods 0.000 abstract 3
- 239000002912 waste gas Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Feeding And Controlling Fuel (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention provides an intelligent combustion system comprising restriction orifice plates. The system is provided with a thermal treatment furnace. The thermal treatment furnace is provided with a combustor. Pipelines on the two sides of the combustor are provided with the restriction orifice plates. The pipelines comprise the main air pipeline, the main gas pipeline, the ignition air pipeline and the ignition gas pipeline, wherein the main air pipeline, the main gas pipeline, the ignition air pipeline and the ignition gas pipeline are correspondingly provided with the main air restriction orifice plate, the main gas restriction orifice plate, the ignition air restriction orifice plate and the ignition gas restriction orifice plate. The main air pipeline is connected with a waste gas pipeline through an air cock reversing valve. According to the intelligent combustion system comprising the restriction orifice plates, the restriction orifice plates are applied to the thermal treatment furnace combustion system for the first time; by means of the scheme, construction cost and material cost are greatly lowered, stable operation of the combustion system is guaranteed, and meanwhile the combustion system is intelligent and adjustable.
Description
Technical field
The present invention relates to a kind of combustion system comprising the huge many heat-treatment furnaces of number of burners, especially relate to a kind of intelligent combustion system applying restriction orifice replacement hand valve.
Background technology
Restriction orifice is as restricting element, owing to having, structure is simple, easily processing, low cost of manufacture, the advantage such as easy for installation, under the prerequisite meeting technological requirement, restriction orifice is used to replace control valve carry out limited flow rate or reduce pressure, investment and operating maintenance expense will be reduced widely, therefore be widely used in process unit abroad, the safe operation of device is played an important role.But the application of restriction orifice is also not enough in process unit at home at present, there is gap compared with abroad.In needs limited flow rate or reduction pressure part, control valve is mostly adopted to realize.Do not need to regulate in the scope that the flow of some local fluid only requires to be limited to a certain regulation, and not high to the accuracy requirement of its flow yet, completely can use restriction orifice to replace.Therefore, in the design of process unit, be necessary the advantage fully realizing restriction orifice, pay attention to the application of restriction orifice.
Summary of the invention
The invention provides a kind of intelligent combustion system utilizing restriction orifice to replace hand valve, the restriction orifice of manual modulation valve simple structure before the mouth of the primary air in huge for number of burners many heat-treatment furnaces, main combustion gas, igniting air, gas for ignition is replaced, ensure that the main combustion gas of single stage burners, primary air, igniting combustion gas, igniting air mass flow are even, easy for installationly compared with common valve greatly save construction cost.Its technical scheme is as described below:
A kind of intelligent combustion system applying restriction orifice, described Operation system setting has heat-treatment furnace, described heat-treatment furnace is provided with burner, the install pipeline current limiting orifice plate of described burner both sides, described pipeline comprises blast main, main gas pipe road, igniting air duct, gas for ignition pipeline, correspondence is provided with primary air restriction orifice, main coal gas restriction orifice, igniting air restriction orifice, gas for ignition restriction orifice respectively, and described blast main is connected with exhaust piping by air cock reversal valve.
Described restriction orifice is arranged between the flange of pipeline, and the external diameter of described restriction orifice is slightly larger than the flange outer diameter of its both sides.
Described restriction orifice is general steel sheet, and cost is extremely low, has greatly saved material cost compared to common valve.Described restriction orifice is fixed by the bolt of two side flanges.Described restriction orifice is the scarce concentric orifice orifice plate of circle.
Described main gas pipe road and gas for ignition install pipeline have cuts valve soon, describedly cuts the outside that valve is positioned at main coal gas restriction orifice and gas for ignition restriction orifice soon, arrives burner for controlling gas by restriction orifice.
Described main gas pipe road and exhaust piping are all provided with flow control valve.
The both sides that described main gas pipe road is positioned at heat-treatment furnace are connected with nitrogen sparge tube road, and described nitrogen sparge tube road is provided with cuts valve soon.
The described intelligent combustion system utilizing restriction orifice to replace hand valve makes the combustion gas needed for single burner of identical bringing-up section, air mass flow equal, ensures system stability; Utilize restriction orifice to replace mouth remote holder valve, while ensureing to meet heating process, greatly save construction cost, material cost; And the measure of multiple adjustment thermic load can be taked in process of production according to actual needs, achieve intelligent adjustment.
Accompanying drawing explanation
Fig. 1 is the schematic diagram utilizing the intelligent combustion system of restriction orifice provided by the invention;
Fig. 2 is the detailed description of the invention schematic diagram of restriction orifice in this intelligent combustion system;
Fig. 3 is the side view of Fig. 2.
Detailed description of the invention
The restriction orifice that utilizes that the present invention relates to replaces the intelligent combustion system of hand valve, its Major Systems device as shown in Figure 1, in Fig. 1 by different pipe-line systems with different fringe areas separately, described pipeline comprises blast main 1, main gas pipe road 2, igniting air duct 4, gas for ignition pipeline 3, described blast main 1 is connected with exhaust piping 5 by air cock reversal valve 51, and described main gas pipe road 2 and exhaust piping 5 are all provided with flow control valve.Except the device marked in system, all the other main devices comprise: main coal gas restriction orifice 11, primary air restriction orifice 21, gas for ignition restriction orifice 31, igniting air restriction orifice 41.
Burner both sides in heat-treatment furnace 9, four pipelines arranged, hithermost is the restriction orifice of each pipeline, is secondly cut valve 7 soon, the both sides being positioned at heat-treatment furnace 9 in main gas pipe road 2 are connected with nitrogen sparge tube road 6, and described nitrogen sparge tube road 6 is provided with cuts valve 7 soon.
As shown in Figures 2 and 3, what described restriction orifice adopted is that circle lacks concentric orifice orifice plate, circle is lacked restriction orifice and is placed between both sides flange 10, be conducive to the installation and removal of restriction orifice like this; Ensure that the external diameter of restriction orifice is fixed slightly larger than the bolt 12 of flange 10 external diameter by flange 10, makes restriction orifice firmly fix while ensure that the sealing of pipeline simultaneously as far as possible.The stable performance of this covering device, installs succinct, any engineering cost of cheap browband hardly of constructing, greatly cost-saving.
Present system achieves the replacement completely of manual modulation valve before restriction orifice lip-syncing as shown in Figure 1, fluid can produce pressure drop when flowing through restriction orifice, elected fixed limit stream panel aperture, during other stable conditions, by square being directly proportional of the flow of metering hole and the pressure reduction before and after restriction orifice, the flow passed through increases along with the increase of pressure drop, until the pressure after orifice plate reaches its critical pressure, flow will no longer change along with the pressure drop of orifice plate, namely the effect of current limliting is reached, described is that circle lacks concentric orifice orifice plate with the restriction orifice that the intelligent combustion system that restriction orifice replaces hand valve relates to, it is as follows that it specifically implements principle:
When choosing restriction orifice, first go out total gas quantity of this bringing-up section according to the calculation of Heat Load of current bringing-up section, then calculate the gas quantity V needed for every burner.Then first estimate restriction orifice aperture d, and then calculate restriction orifice pressure differential deltap P.Finally, whether inverse pressure drop meets the effect of current limliting, pressure P 2 after will as far as possible making restriction orifice when choosing throttle orifice orifice aperture d equals critical pressure Pc or is slightly less than critical pressure Pc, so not only can reach the effect of current limliting but also ensure to use the pipeline of restriction orifice to there will not be the phenomenon of plug flow of choking.
The described restriction orifice that utilizes replaces the intelligent combustion system of hand valve, if need to adjust the thermic load of single hop in actual production running.Coal gas before cutting off mouth can be adopted to cut valve soon to turn off the method for corresponding burner to reduce the thermic load of corresponding bringing-up section; Also can by adjustment single hop gas main, air header pressure changes the coal gas of the integral burner of corresponding bringing-up section, the mode of air mass flow adjusts thermic load (flow of dielectric gas is directly proportional with the pressure of corresponding medium house steward).
Above disclosedly be only preferred embodiment of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalence change that the present patent application the scope of the claims is done, still belong to protection scope of the present invention.
Claims (8)
1. apply the intelligent combustion system of restriction orifice for one kind, it is characterized in that: described Operation system setting has heat-treatment furnace, described heat-treatment furnace is provided with burner, the install pipeline current limiting orifice plate of described burner both sides, described pipeline comprises blast main, main gas pipe road, igniting air duct, gas for ignition pipeline, correspondence is provided with primary air restriction orifice, main coal gas restriction orifice, igniting air restriction orifice, gas for ignition restriction orifice respectively, and described blast main is connected with exhaust piping by air cock reversal valve.
2. the intelligent combustion system of application restriction orifice according to claim 1, is characterized in that: described restriction orifice is arranged between the flange of pipeline, and the external diameter of described restriction orifice is slightly larger than the flange outer diameter of its both sides.
3. the intelligent combustion system of application restriction orifice according to claim 1, is characterized in that: described restriction orifice is general steel sheet.
4. the intelligent combustion system of application restriction orifice according to claim 1, is characterized in that: described restriction orifice is fixed by the bolt of two side flanges.
5. the intelligent combustion system of application restriction orifice according to claim 1, is characterized in that: described restriction orifice is the scarce concentric orifice orifice plate of circle.
6. the intelligent combustion system of application restriction orifice according to claim 1, it is characterized in that: described main gas pipe road and gas for ignition install pipeline have cuts valve soon, describedly cutting the outside that valve is positioned at main coal gas restriction orifice and gas for ignition restriction orifice soon, arriving burner for controlling gas by restriction orifice.
7. the intelligent combustion system of application restriction orifice according to claim 1, is characterized in that: described main gas pipe road and exhaust piping are all provided with flow control valve.
8. the intelligent combustion system of application restriction orifice according to claim 1, is characterized in that: the both sides that described main gas pipe road is positioned at heat-treatment furnace are connected with nitrogen sparge tube road, and described nitrogen sparge tube road is provided with cuts valve soon.
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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN104373953A true CN104373953A (en) | 2015-02-25 |
| CN104373953B CN104373953B (en) | 2018-09-07 |
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Cited By (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 |
| CN110873336A (en) * | 2018-08-31 | 2020-03-10 | 普锐特冶金技术日本有限公司 | Control device for combustion facility, combustion facility system, and combustion facility operation method |
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2014
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Patent Citations (13)
| 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 |
| JPH1061945A (en) * | 1996-08-19 | 1998-03-06 | Toshiba Corp | Furnace employing burner and control method for the same |
| 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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Cited By (4)
| 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 |
| CN110873336A (en) * | 2018-08-31 | 2020-03-10 | 普锐特冶金技术日本有限公司 | Control device for combustion facility, combustion facility system, and combustion facility operation method |
| CN110873336B (en) * | 2018-08-31 | 2021-09-03 | 普锐特冶金技术日本有限公司 | Control device for combustion facility, combustion facility system, and combustion facility operation method |
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| Publication number | Publication date |
|---|---|
| CN104373953B (en) | 2018-09-07 |
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