CN204201939U - Combined type prevention petroleum chemical heating furnace dodges quick-fried safety control - Google Patents
Combined type prevention petroleum chemical heating furnace dodges quick-fried safety control Download PDFInfo
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- CN204201939U CN204201939U CN201420615625.4U CN201420615625U CN204201939U CN 204201939 U CN204201939 U CN 204201939U CN 201420615625 U CN201420615625 U CN 201420615625U CN 204201939 U CN204201939 U CN 204201939U
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Abstract
The utility model discloses a kind of combined type prevention petroleum chemical heating furnace and dodge quick-fried safety control, it comprises flammable gas alarm, furnace temperature detector, flame detector, logic controller one andlogic control device two, flammable gas alarm connects logic controller one, logic controller one connects fuel flow control valve one and air flow control valve one respectively, furnace temperature detector and flame detector are all connected logic controller two, logic controller two connects fuel flow control valve two and air flow control valve two respectively, fuel flow control valve one and fuel flow control valve two are arranged in series on furnace fuel conveyance conduit, air flow control valve one is arranged on heating furnace airflow pipe, an air conveying branch road in parallel on heating furnace airflow pipe, air flow control valve two is arranged on air conveying branch road.The utility model has manual control dependency degree low, reliability and the more high advantage of security, effectively can control the quick-fried danger of sudden strain of a muscle of heating furnace.
Description
Technical field
The utility model is mainly used in the heating furnace field of petrochemical industry, comprises fuel oil heating and gas-fired heater etc., specifically relates to a kind of combined type prevention petroleum chemical heating furnace and dodges quick-fried safety control.
Background technology
In petrochemical industry is produced, a lot of material needs to improve temperature by oil burner, combustion gas and oil-gas two-way heating furnace, and condensation relates to fuel gas in operation or steam mixes with air.The fluctuation of air feed amount, fuel slash or instrumentation fault etc. may cause heating furnace fray-out of flame, thus cause heating furnace Lighting-blast casualty, cause unplanned parking and equipment personal casualty loss.At present, to the method for controlling security of heating furnace mainly site operation personnel judge whether fray-out of flame occurs according to furnace temperature change, thus to control.These class methods have distinct disadvantage, if be exactly that furnace temperature declines when intervening without personnel after fray-out of flame, control system can automatic increasing fuel amount, causes more serious consequence.In addition, also some heating furnace has flame detector system, and can lose heating furnace extinguish protection function when single flame detector system breaks down.Therefore, rely on artificial or single safety control measures not enough to the security control of heating furnace, need research and development safety control measures more reliably.
Utility model content
Based on above-mentioned technical problem, the utility model provides a kind of combined type to prevent petroleum chemical heating furnace to dodge quick-fried safety control.
The technical solution that the utility model adopts is:
A kind of combined type prevention petroleum chemical heating furnace dodges quick-fried safety control, comprise flammable gas alarm, furnace temperature detector, flame detector, logic controller one andlogic control device two, flammable gas alarm, furnace temperature detector and flame detector are all arranged on heating furnace, flammable gas alarm connects logic controller one, logic controller one connects fuel flow control valve one and air flow control valve one respectively, furnace temperature detector and flame detector are all connected logic controller two, logic controller two connects fuel flow control valve two and air flow control valve two respectively, fuel flow control valve one and fuel flow control valve two are arranged in series on furnace fuel conveyance conduit, air flow control valve one is arranged on heating furnace airflow pipe, an air conveying branch road in parallel on heating furnace airflow pipe, air flow control valve two is arranged on air conveying branch road.
Preferably, described flammable gas alarm is arranged on heating furnace radiant section top, and described furnace temperature detector is arranged in the middle part of heating furnace radiant section, and described flame detector is arranged on bottom heating furnace radiant section.
Preferably, described flammable gas alarm is pump suction type flammable gas alarm.
Advantageous Effects of the present utility model is:
Fuel gas detects by the utility model, the change of furnace temperature and flame detector carry out combination and control, and when one of them control system lost efficacy, another control system still can effectively fuel shutoff charging, and increase air purging, prevents sudden strain of a muscle quick-fried.The utility model has manual control dependency degree low, reliability and the more high advantage of security, effectively can control the quick-fried danger of sudden strain of a muscle of heating furnace, ensures that heating furnace safety and steady runs.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and detailed description of the invention, the utility model is described in further detail:
Fig. 1 is the structural representation that a kind of combined type prevention petroleum chemical heating furnace dodges quick-fried safety control;
In figure: 1-pump suction type flammable gas alarm, 2-furnace temperature detector, 3-flame detector, 4-logic controller one, 5-logic controller two, 6-heating furnace, 7-fuel flow control valve one, 8-air flow control valve one, 9-fuel flow control valve two, 10-air flow control valve two, 11-furnace fuel conveyance conduit, 12-heating furnace airflow pipe, 13-air conveying branch road.
Detailed description of the invention
By reference to the accompanying drawings, a kind of combined type prevention petroleum chemical heating furnace dodges quick-fried safety control, comprises pump suction type flammable gas alarm 1, furnace temperature detector 2, flame detector 3, logic controller 1 andlogic control device 25.Flammable gas alarm 1, furnace temperature detector 2 and flame detector 3 are all arranged on heating furnace 6, wherein flammable gas alarm 1 is arranged on heating furnace radiant section top, furnace temperature detector 2 is arranged in the middle part of heating furnace radiant section, and flame detector 3 is arranged on bottom heating furnace radiant section.Flammable gas alarm 1 connects logic controller 1, and logic controller 1 connects fuel flow control valve 1 and air flow control valve 1 respectively.Furnace temperature detector 2 is all connected logic controller 25 with flame detector 3, and logic controller 25 connects fuel flow control valve 29 and air flow control valve 2 10 respectively.Fuel flow control valve 1 and fuel flow control valve 29 are arranged in series on furnace fuel conveyance conduit 11, air flow control valve 1 is arranged on heating furnace airflow pipe 12, an air conveying branch road 13 in parallel on heating furnace airflow pipe 12, air flow control valve 2 10 is arranged on air conveying branch road 13.
Utilize said apparatus to carry out combined type prevention petroleum chemical heating furnace and dodge a quick-fried method of controlling security, its concrete steps are as follows:
When the main flame of heating furnace occurs to extinguish, the pump suction type flammable gas alarm 1 that heating furnace radiant section top is arranged by combustable gas concentration Signal transmissions to logic controller 1.Logic controller 1 detects that fuel gas volumetric concentration exceedes the setting number range upper limit, setting number range is 1 ‰-1%, trigger associated control element, rapid fuel shutoff flow control valve 1, standard-sized sheet air flow control valve 1, carries out air and purges 30 minutes to 60 minutes in burner hearth, treats that in burner hearth, combustable gas concentration is reduced in setting number range, setting number range is 0.5 ‰-0.5%, re-starts heating furnace ignition operation.
Simultaneously when the main flame lamp of heating furnace occurs to extinguish, heating furnace radiant section center ovens temperature detector 2 senses that furnace temperature declines, and transfer signals to logic controller 25, the flame detector 3 be simultaneously positioned at bottom heating furnace radiant section detects main fray-out of flame, also transfers signals to logic controller 25.Logic controller 25 is by the analysis of two signals, determine heating furnace fray-out of flame, trigger associated control element, rapid fuel shutoff flow control valve 29, standard-sized sheet air flow control valve 2 10, carries out air and purges 30 minutes to 60 minutes in burner hearth, treats that in burner hearth, combustable gas concentration is reduced in setting number range, setting number range is 0.5 ‰-0.5%, re-starts heating furnace ignition operation.
Embody rule example 1
When the heating furnace taking methane as fuel causes main flame and altar lamp to occur to extinguish due to misoperation, the pump suction type flammable gas alarm that heating furnace radiant section top is arranged, detect that fuel gas volumetric concentration is more than 1% (the aerial LEL of methane is 5%), trigger associated control element, fuel shutoff flow control valve one, standard-sized sheet air flow control valve one.Simultaneously, heating furnace radiant section center ovens temperature detector senses that furnace temperature declines rapidly 20 °, flame detector bottom heating furnace radiant section detects main fray-out of flame, trigger associated control element, rapid fuel shutoff fuel flow control valve two, standard-sized sheet air flow control valve two, carries out air and purges 30 minutes in burner hearth, after combustable gas concentration is reduced to 0.1% in burner hearth, re-start heating furnace ignition operation.
Embody rule example 2
When the heating furnace taking heavy oil as fuel causes main flame and altar lamp to occur to extinguish due to misoperation, the pump suction type flammable gas alarm one that heating furnace radiant section top is arranged, detect that fuel gas volumetric concentration is more than 0.5% (the aerial LEL of heavy oil is 0.25%), trigger associated control element, fuel shutoff flow control valve one, standard-sized sheet air flow control valve one.Simultaneously, heating furnace radiant section center ovens temperature detector senses that furnace temperature declines rapidly 30 °, flame detector bottom heating furnace radiant section detects main fray-out of flame, trigger associated control element, rapid fuel shutoff flow control valve two, standard-sized sheet air flow control valve two, carries out air and purges 60 minutes in burner hearth, after combustable gas concentration is reduced to 0.5 ‰ in burner hearth, re-start heating furnace ignition operation.
Claims (3)
1. combined type prevention petroleum chemical heating furnace dodges quick-fried safety control, it is characterized in that: comprise flammable gas alarm, furnace temperature detector, flame detector, logic controller one andlogic control device two, flammable gas alarm, furnace temperature detector and flame detector are all arranged on heating furnace, flammable gas alarm connects logic controller one, logic controller one connects fuel flow control valve one and air flow control valve one respectively, furnace temperature detector and flame detector are all connected logic controller two, logic controller two connects fuel flow control valve two and air flow control valve two respectively, fuel flow control valve one and fuel flow control valve two are arranged in series on furnace fuel conveyance conduit, air flow control valve one is arranged on heating furnace airflow pipe, an air conveying branch road in parallel on heating furnace airflow pipe, air flow control valve two is arranged on air conveying branch road.
2. combined type prevention petroleum chemical heating furnace according to claim 1 dodges quick-fried safety control, it is characterized in that: described flammable gas alarm is arranged on heating furnace radiant section top, described furnace temperature detector is arranged in the middle part of heating furnace radiant section, and described flame detector is arranged on bottom heating furnace radiant section.
3. combined type prevention petroleum chemical heating furnace according to claim 1 and 2 dodges quick-fried safety control, it is characterized in that: described flammable gas alarm is pump suction type flammable gas alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420615625.4U CN204201939U (en) | 2014-10-22 | 2014-10-22 | Combined type prevention petroleum chemical heating furnace dodges quick-fried safety control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420615625.4U CN204201939U (en) | 2014-10-22 | 2014-10-22 | Combined type prevention petroleum chemical heating furnace dodges quick-fried safety control |
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| CN204201939U true CN204201939U (en) | 2015-03-11 |
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| CN201420615625.4U Active CN204201939U (en) | 2014-10-22 | 2014-10-22 | Combined type prevention petroleum chemical heating furnace dodges quick-fried safety control |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329687A (en) * | 2014-10-22 | 2015-02-04 | 中国石油化工股份有限公司 | Combination type safety control device and method for preventing instant exploding of petrochemical heating furnace |
| CN108348793A (en) * | 2015-10-30 | 2018-07-31 | 联邦科学和工业研究组织 | Pipe-line system |
-
2014
- 2014-10-22 CN CN201420615625.4U patent/CN204201939U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329687A (en) * | 2014-10-22 | 2015-02-04 | 中国石油化工股份有限公司 | Combination type safety control device and method for preventing instant exploding of petrochemical heating furnace |
| CN108348793A (en) * | 2015-10-30 | 2018-07-31 | 联邦科学和工业研究组织 | Pipe-line system |
| US20180272165A1 (en) * | 2015-10-30 | 2018-09-27 | Commonwealth Scientific And Industrial Research Organisation | Ducting system |
| US10758753B2 (en) * | 2015-10-30 | 2020-09-01 | Commonwealth Scientific And Industrial Research Organisation | Ducting system |
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