CN101907357A - Distributed control system (DCS) control method capable of improving safety of airheater - Google Patents
Distributed control system (DCS) control method capable of improving safety of airheater Download PDFInfo
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- CN101907357A CN101907357A CN2009100526181A CN200910052618A CN101907357A CN 101907357 A CN101907357 A CN 101907357A CN 2009100526181 A CN2009100526181 A CN 2009100526181A CN 200910052618 A CN200910052618 A CN 200910052618A CN 101907357 A CN101907357 A CN 101907357A
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- air fan
- airheater
- primary air
- hot
- blast stove
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Abstract
The invention relates to a distributed control system (DCS) control method capable of improving the safety of an airheater. The DCS control method comprises the following steps that: after the airheater 3 stops, a secondary air fan 2 stops at once and a primary air fan 1 continues to run; and when the temperature of a hearth of the airheater 3 is below 60 DEG C, the primary air fan 1 stops running. A temperature signal 4 of the airheater is transmitted to a comparison logical module 5 to perform comparison; if the temperature signal 4 of the airheater is below 60 DEG C, the comparison logical module 5 outputs a stop signal 6 showing 1 and the primary air fan 1 stops running; and if the temperature signal 4 of the airheater is above 60 DEG C, the comparison logical module 5 outputs a stop signal 6 showing 0 and the running state of the primary air fan 1 does not change. The DCS control method has the advantages of improving the running method of the primary air fan after the conventional airheater with potential dangers stops and improving the safety of the airheater and the safety of the control system of the whole production line.
Description
Technical field
The invention belongs to metallurgical technology field, relate in particular to a kind of DCS control method that improves safety of airheater.
Background technology
COREX ground-slag grinding system is a COREX slag breeze production line of producing 500000 tons per year.Wherein, hot-blast stove plays crucial effects in whole production line.Present technology, hot-blast stove are after stopping, and primary air fan also stops thereupon, and be unfavorable to the safety of hot-blast stove because that hot-blast stove stops in the rear hearth temperature is higher, thereby have influence on production.Therefore, this situation is badly in need of changing.
Summary of the invention
The objective of the invention is a kind of DCS control method that improves safety of airheater.
Technical scheme of the present invention is that a kind of DCS control method that improves safety of airheater is characterized in that, may further comprise the steps:
Stop overfire air fan 2 after hot-blast stove 3 stops immediately, primary air fan 1 continues operation;
Then primary air fan 1 is out of service less than 60 ℃ for temperature in hot-blast stove 3 burner hearths.
Described in hot-blast stove 3 burner hearths temperature less than 60 ℃ then primary air fan 1 step out of service also comprise:
The temperature signal 4 of described hot-blast stove reaches CL Compare Logic module 5 and compares, if the temperature signal of described hot-blast stove 4 less than 60 ℃, then described CL Compare Logic module 5 output stop signals 6 are 1, then primary air fan 1 is out of service;
If the temperature signal of hot-blast stove 4 is greater than 60 ℃, then described CL Compare Logic module 5 output stop signals 6 are 0, and then primary air fan 1 running status is constant.
The invention has the beneficial effects as follows, improved the operation method that the former hot-blast stove that pre-exists hidden danger stops the back primary air fan, improved the security of hot-blast stove and the security of whole production line control system.
Description of drawings
Fig. 1 is a system construction drawing in the prior art of the present invention
Fig. 2 is a signal flow graph in one embodiment of the invention
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a system construction drawing.
Among the figure, the 1st, primary air fan, the 2nd, overfire air fan, the 3rd, hot-blast stove.
Fig. 2 is improved DCS programme diagram.
Among the figure, the 4th, hot-blast stove fire box temperature signal, the 5th, CL Compare Logic module, the 6th, stop signal.
As shown in fig. 1, overfire air fan 2 stops immediately after hot-blast stove 3 stops, and primary air fan 1 continues operation, and temperature spends less than 60 that then primary air fan 1 is out of service automatically in hot-blast stove 3 burner hearths.
Again as shown in Figure 2, hot-blast furnace temperature signal 4 reaches CL Compare Logic module 5 and compares, if hot-blast furnace temperature signal 4 less than 60, then CL Compare Logic module 5 is output as 1, promptly stop signal 6 is 1, then primary air fan 1 is out of service; If hot-blast stove signal 4 is greater than 60, then CL Compare Logic module 5 is output as 0, and promptly stop signal 6 is 0, and then primary air fan 1 running status does not change.
Claims (2)
1. a DCS control method that improves safety of airheater is characterized in that, may further comprise the steps:
Stop overfire air fan (2) after hot-blast stove (3) stops immediately, primary air fan (1) continues operation;
Then primary air fan (1) is out of service less than 60 ℃ for temperature in hot-blast stove (3) burner hearth.
2. improve the DCS control method of safety of airheater according to claim 1, it is characterized in that, described in hot-blast stove (3) burner hearth temperature less than 60 ℃ then primary air fan (1) step out of service also comprise:
The temperature signal of described hot-blast stove (4) reaches CL Compare Logic module (5) and compares, if the temperature signal of described hot-blast stove (4) less than 60 ℃, then described CL Compare Logic module (5) output stop signal (6) is 1, then primary air fan (1) is out of service;
If the temperature signal of hot-blast stove (4) is greater than 60 ℃, then described CL Compare Logic module (5) output stop signal (6) is 0, and then primary air fan (1) running status is constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100526181A CN101907357B (en) | 2009-06-05 | 2009-06-05 | Distributed control system (DCS) control method capable of improving safety of airheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100526181A CN101907357B (en) | 2009-06-05 | 2009-06-05 | Distributed control system (DCS) control method capable of improving safety of airheater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101907357A true CN101907357A (en) | 2010-12-08 |
| CN101907357B CN101907357B (en) | 2012-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100526181A Active CN101907357B (en) | 2009-06-05 | 2009-06-05 | Distributed control system (DCS) control method capable of improving safety of airheater |
Country Status (1)
| Country | Link |
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| CN (1) | CN101907357B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088177B (en) * | 2013-01-27 | 2014-07-02 | 河北钢铁股份有限公司承德分公司 | Hot-air furnace pressure-filling control device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1170858A (en) * | 1996-05-27 | 1998-01-21 | 宝山钢铁(集团)公司 | Off-line control method for hot-blast stove operation |
| CN2480766Y (en) * | 2001-04-23 | 2002-03-06 | 张立昌 | Coal combustion hot-blast stove |
| CN2610256Y (en) * | 2003-02-28 | 2004-04-07 | 陈�胜 | Vertical hot-blast furnace of two-way blowing-in |
| WO2005124244A1 (en) * | 2004-06-16 | 2005-12-29 | Woo Young Park | Hot-air blower having artificial intelligence |
| CN201163107Y (en) * | 2008-01-15 | 2008-12-10 | 韩长洪 | Temperature and air quantity control device of hot air gun |
-
2009
- 2009-06-05 CN CN2009100526181A patent/CN101907357B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1170858A (en) * | 1996-05-27 | 1998-01-21 | 宝山钢铁(集团)公司 | Off-line control method for hot-blast stove operation |
| CN2480766Y (en) * | 2001-04-23 | 2002-03-06 | 张立昌 | Coal combustion hot-blast stove |
| CN2610256Y (en) * | 2003-02-28 | 2004-04-07 | 陈�胜 | Vertical hot-blast furnace of two-way blowing-in |
| WO2005124244A1 (en) * | 2004-06-16 | 2005-12-29 | Woo Young Park | Hot-air blower having artificial intelligence |
| CN201163107Y (en) * | 2008-01-15 | 2008-12-10 | 韩长洪 | Temperature and air quantity control device of hot air gun |
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| Publication number | Publication date |
|---|---|
| CN101907357B (en) | 2012-11-21 |
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