CN101881960B - Safety control strategy for blast furnace soft water sealing, circulating and cooling system - Google Patents
Safety control strategy for blast furnace soft water sealing, circulating and cooling system Download PDFInfo
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Abstract
The invention provides a safety control strategy for a blast furnace soft water sealing, circulating and cooling system, which comprises a soft water supplementing safety control strategy and a water supply pump unit safety control strategy, wherein the liquid level of an expansion tank can be maintained to the normal level by the soft water supplementing safety control strategy; and the main water supply pump unit and the pressurizing pump unit can maintain the soft water supply of the blast furnace soft water sealing, circulating and cooling system by the water supply pump unit safety control strategy under accidents. By closely combining with the process practical situation, the invention can determine the output of the control strategy by analyzing the actual data of faults, and realize the accident emergency handling and safety control of the soft water sealing and circulating system.
Description
Technical field
The present invention relates to blast furnace cooling system, particularly relate to a kind of blast furnace soft water closed circulation cooling system.
Background technology
Blast furnace soft water closed circulation cooling system is the important component part of blast furnace process system, and it is being born is the mission critical that blast furnace cools off, whether closely related with blast furnace generation furnace life longevity.In a single day cooling system goes wrong, and can not rationally handle or find early, and the serious threat blast furnace is produced, and causes enormous economic loss.Therefore, the research of the safety control strategy of blast furnace soft water closed circulation cooling system is extremely urgent with application.
Several types problem below at present soft water airtight circulating cooling system and control strategy thereof exist: expansion drum liquid level control strategy is with to detect data processing too simple, is prone to cause in particular cases equipment malfunction to do or be failure to actuate, and influences whole soft water system direct motion; The control timing of important pneumatic valve is unreasonable in the soft water closed circulation system, is difficult to bring into play the emergency capability of soft water system processing accident; The fault handling strategy of pump group and pump is too oversimplified, and lacks theoretical analysis and experimental data.
Summary of the invention
Technical matters to be solved by this invention is: a kind of safety control strategy for blast furnace soft water sealing, circulating and cooling system is provided, and the present invention can realize the accident emergent management and the security control of soft water closed circulation system.
The technical scheme that the present invention adopted is: blast furnace soft water closed circulation cooling system comprises the additional soft wa ter safety control strategy, makes the expansion drum liquid level remain on ordinary water level; Make-up pump group safety control strategy makes main feed water pump group and supercharge pump group can keep the soft water supply of blast furnace soft water closed circulation cooling system in the state of accident.
The additional soft wa ter safety control strategy comprise following some:
(11) with the expansion drum water level according to being divided into 5 grades from high to low: high, high and low, low and low low, setting ordinary water level is between top grade and the low grade;
(12) water level in detection soft water pond when its water level is low-grade or hangs down low grade, then stops the operation of additional soft wa ter pump group, otherwise gets into next step; And when receiving the low low-grade signal 5s in soft water pond, and its rate of change normal interval in the time, assert that just the signal that hangs down low grade is effective;
(13) detect the water level of expansion drum, confirm the running status of blast furnace soft water closed circulation cooling system, when said cooling system normally moves, the loss moisturizing; When said cooling system leaks, emergency water compensating; When expansion drum sensor signal fault, estimate moisturizing; When having water pump to go wrong in the additional soft wa ter pump group, launch the stand-by equipment moisturizing; When the water level of expansion drum was top grade, nitrogen valve was closed, and surplus valve is opened; When the non-height of the water level of expansion drum was high-grade, nitrogen valve was opened, and surplus valve cuts out; When handling, after additional soft wa ter pump group has water pump operation 5 seconds, open soft water make-up pump group outlet pneumatic valve again, before stopping last process pump, close the termination of pumping again of soft water make-up pump group outlet pneumatic valve earlier.
Make-up pump group safety control strategy comprise following some:
(21) four electric water pumps with the main feed water pump group use 2, in addition 2 subsequent use, add a Diesel engine pump as subsequent use; Three electric water pumps of high-pressure water supply pump group use 1, in addition 2 subsequent use; In press two electric water pumps of make-up pump group to use 1, in addition 1 subsequent use; Under the normal condition, middle and high pressure make-up pump group respectively has a water pump to be in running status, and the main feed water pump group has 2 electric water pumps in operation; Under the accident condition, just get into (22), just get into (23) if the main feed water pump group breaks down if mesohigh make-up pump group breaks down;
(22) mesohigh pump group is subsequent use mutually:
If the process pump of middle pressure make-up pump group breaks down, and its stand-by pump also breaks down, and first stand-by pump of high-pressure water supply pump group can start automatically, and simultaneously, mesohigh pump group UNICOM pneumatic valve is opened; In the middle of press the make-up pump group to have a pump to recover normal and operation after, the high-pressure water supply pump group can a stand-by pump out of service, mesohigh pump group UNICOM pneumatic valve cuts out;
If the process pump fault of high-pressure water supply pump group, and two stand-by pumps be all can't normally start the time, and the stand-by pump of middle pressure make-up pump group starts automatically, and simultaneously, mesohigh pump group UNICOM pneumatic valve is opened; After the high-pressure water supply pump group has a pump to recover normal and moves, a middle pressure make-up pump group meeting stand-by pump out of service, mesohigh pump group UNICOM pneumatic valve cuts out;
If the process pump fault of high-pressure water supply pump group, and two stand-by pumps all can't normally start, and the stand-by pump of middle pressure make-up pump group starts under the failure scenarios automatically, and mesohigh pump group UNICOM pneumatic valve is opened; After the high-pressure water supply pump group had a pump to recover normal and moves, mesohigh pump group UNICOM pneumatic valve cut out;
When the water pump of high-pressure water supply pump group all can't move; No matter the middle make-up pump group of pressing has several pumps in operation; All close accident current limliting pneumatic valve, after the ruuning situation of all pump groups of this blast furnace soft water closed circulation cooling system was recovered normally, accident current limliting pneumatic valve was opened again;
(23) the main feed water pump group breaks down: when the main feed water pump group had only an electric water pump or electric water pump all can not move, Diesel engine pump started; If when all water pumps can't start, then open main feed water pump bypass pneumatic valve, guarantee the water route backflow; When any water pump wherein resumes operation, then close main feed water pump bypass pneumatic valve.
Advantage of the present invention: the present invention's technology reality of combining closely, confirm control strategy output with the fault actual data analysis, can realize the accident emergent management and the security control of soft water closed circulation system.
Description of drawings
Fig. 1 is a structured flowchart of the present invention.
Among the figure, additional soft wa ter pump group: water pump P 0-1, P0-2, P0-3; Main feed water pump group: water pump P 3-1, P3-2, P3-3, P3-4, P3-5, P3-6; High-pressure water supply pump group: water pump P 1-1, P1-2, P1-3; The middle make-up pump group of pressing: water pump P 2-1, P2-2; Cooling device: cooling wall straight tube, coiled pipe, furnace bottom cooling tube; Air port pipe valve: cover, belly pipe, hot-blast valve, exhaust valve in tuyere small sleeve, the air port; V1: mesohigh pump group UNICOM pneumatic valve; V2: accident current limliting pneumatic valve; V3: main feed water pump bypass pneumatic valve; V4: soft water make-up pump group outlet pneumatic valve; V5: expansion drum pneumatic valve; V6: expansion drum surplus valve; V7: gasification cooling pneumatic valve; V8: expansion drum draining valve.
Embodiment
Carry out detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.
As shown in Figure 1, blast furnace soft water closed circulation cooling system comprises cooling device, expansion drum, heat exchanger, main feed water pump group, supercharge pump group, air port pipe valve, degassing tank and additional soft wa ter pump group; Soft water is delivered to cooling device by the main feed water pump group, is divided into two-way again, the one tunnel directly deliver to degassing tank before; Another road is through supercharge pump group and air port pipe valve; Deliver to the degassing tank degassing after two-way converges, get into expansion drum pressurization, leak detection then, get into the heat exchanger cooling at last; Soft water after the cooling is delivered to the main feed water pump group and is recycled again, and the output of additional soft wa ter pump group is connected to the main feed water pump group.Wherein, the moisturizing of the liquid level of expansion drum control additional soft wa ter pump group, the pressure of the pressure control of expansion drum soft water cooling system of the present invention.
Additional soft wa ter pump group comprises two electric water pumps and a Diesel engine pump, i.e. water pump P 0-1, P0-2, the P0-3 of parallel connection.Additional soft wa ter pump group is connected to the main feed water pump group through soft water make-up pump group outlet pneumatic valve V4, also is connected to soft water preparation system and soft water pond between soft water make-up pump group and the outer net.Also be connected to chemicals dosing plant in the cooling system of the present invention.
The main feed water pump group comprises four electric water pumps and a Diesel engine pump, i.e. water pump P 3-1, P3-2, P3-3, P3-4, P3-5, the P3-6 of parallel connection.The main feed water pump group also is connected to main feed water pump bypass pneumatic valve V3.
Cooling device comprises coiled pipe, furnace bottom cooling tube and cooling wall straight tube, and is parallelly connected with the cooling wall straight tube again after coiled pipe and the series connection of furnace bottom cooling tube.Coiled pipe is divided into a shaft middle part cupola well spiral coil cooling tube system of spiral coil cooling tube system again.
The supercharge pump group comprises the high-pressure water supply pump group and the middle pressure make-up pump group of parallel connection.The high-pressure water supply pump group comprises three electric water pumps of parallel connection, i.e. water pump P 1-1, P1-2, P1-3.Middle two electric water pumps of pressing the make-up pump group to comprise parallel connection, i.e. water pump P 2-1, P2-2.Also be connected to the mesohigh pump group pneumatic valve V1 of UNICOM between the output terminal of high-pressure water supply pump group and middle pressure make-up pump group.
The air port pipe valve comprises cover, belly pipe, hot-blast valve and exhaust valve in tuyere small sleeve, the air port; Be connected to tuyere small sleeve between high-pressure water supply pump group and the degassing tank; The middle pressure is connected to cover, belly pipe, hot-blast valve and exhaust valve in the parallelly connected air port between make-up pump group and the degassing tank; The input end of tuyere small sleeve also links to each other with the output terminal of additional soft wa ter pump group, and the bypass of the cooling device before the degassing tank also is connected to accident current limliting pneumatic valve V2.
Also be connected to gasification cooling pneumatic valve V7 on the tie point of cooling device output terminal and supercharge pump group input end; When all pump group (containing Diesel engine pump) faults of soft water system; Open pneumatic valve V7 and carry out the gasification cooling under the extreme case, be connected to expansion drum surplus valve V6, expansion drum draining valve V8 that expansion drum nitrogen valve V5 links to each other with output terminal on the expansion drum.
The safety control strategy of blast furnace soft water closed circulation cooling system comprises: the additional soft wa ter safety control strategy makes the expansion drum liquid level remain on ordinary water level; Make-up pump group safety control strategy makes main feed water pump group and supercharge pump group can keep the soft water supply of blast furnace soft water closed circulation cooling system in the state of accident.
The equipment and the sensor signal of participating in the additional soft wa ter security control have: soft water make-up pump group, soft water make-up pump group outlet pneumatic valve V4, expansion drum nitrogen valve V5, expansion drum surplus valve V6, the liquid level signal of expansion drum, the liquid level signal in soft water pond.
Wherein, the additional soft wa ter safety control strategy comprise following some:
(11) with the water level in expansion drum and soft water pond according to being divided into 5 grades from high to low: high, high and low, low and low low, setting ordinary water level is between top grade and the low grade, and as top grade is set at 3.86m, low grade is set at 2.64m.
(12) water level in detection soft water pond when its water level is low grade or low low grade, gets into soft water system for preventing air, must stop the operation of additional soft wa ter pump group, otherwise get into next step.For guaranteeing the low-grade signal accuracy of soft water pit level, prevent the mistakenly stop pump, so when receiving low-grade signal 5s, and its rate of change normal interval in the time, assert that just the signal that hangs down low grade is effective.
(13) detect the water level of expansion drum, confirm the running status of blast furnace soft water closed circulation cooling system, when said cooling system normally moves, the loss moisturizing; When said cooling system leaks, emergency water compensating; When expansion drum sensor signal fault, estimate moisturizing; When having water pump to go wrong in the additional soft wa ter pump group, launch the stand-by equipment moisturizing.When the water level of expansion drum was top grade, nitrogen valve V5 closed, and surplus valve V6 opens; When the non-height of the water level of expansion drum was high-grade, nitrogen valve V5 opened, and surplus valve V6 closes.Soft water make-up pump group outlet pneumatic valve V4 and soft water make-up pump group are chain; When handling in this step; After additional soft wa ter pump group has water pump operation 5 seconds; Open soft water make-up pump group outlet pneumatic valve V4 again, before stopping last process pump, close soft water make-up pump group outlet pneumatic valve V4 termination of pumping more earlier.
Specifically comprise (13) o'clock in the above-mentioned additional soft wa ter safety control strategy following some:
(131) detect the water level of expansion drum, confirm the running status of blast furnace soft water closed circulation cooling system; If normal operation gets into (132); If there is seepage in system, get into (133); When if the expansion drum sensor signal breaks down, get into (134); If occur the water pump problem when carrying out the first three disposition, get into (135).
(132) loss moisturizing: under normal situation is supplied power by full factory; Said cooling system normally moves, and along with system loss, the expansion drum decline of water table is to low-grade; An electric water pump moisturizing that starts in the additional soft wa ter pump group is carried out the loss moisturizing, the pump of cutting off the water when water level rises to top grade.
(133) emergency water compensating: if the expansion drum decline of water table is to low low-grade; Illustrative system has seepage, except starting an electric water pump, increases an electric water pump emergency water compensating again; When water level rises to low grade, stop an electric water pump, when water level rises to top grade, stop all water pumps; If the expansion drum decline of water table starts Diesel engine pump to low-grade, when water level rises to low grade, stop Diesel engine pump, handle according to preceding method then.
(134) estimate moisturizing: the main foundation of soft water system moisturizing is the expansion drum liquid level; Expansion drum tuning fork switch is positioned on blast-furnace body, and sensor signal problem inaccurate and communication failure happens occasionally, therefore; Under the inaccurate situation of expansion drum liquid level signal, realize estimating moisturizing.
Be that following three kinds of situation are handled at first with expansion drum liquid level shelves signal distinguishing:
First: there is logical relation in five sensing switchs of expansion drum liquid level shelves itself, and high signal has, and then low signal must not have; High signal has, and then high signal has; Low low signal has, and then low, low signal has; Low low signal has, and then low signal has;
Second:, its Changing Pattern is carried out on-line study and record for high signal, low signal;
The 3rd: judge whether high signal frequently occurs, and saltus step;
Specifically handle then,, provide the indication of reporting to the police of expansion drum liquid level sensor switch fault, get into simultaneously by the time and estimate the moisturizing control model when not satisfying first kind of situation or the 3rd step when obtaining affirmative determination.Native system is 5.5 tons of moisturizings in 24 hours (this value is continuous on-line study) when running well.When estimating moisturizing and beginning, time of finishing of the last moisturizing of record distance this moment at first, and calculate time of moisturizing next time; Estimating under the moisturizing pattern, realizing replenishing certain water, during this period by the time; If it is normal that level switch recovers, then switch to by sensor signal moisturizing pattern.
(135) stand-by equipment moisturizing: if the electric water pump in expansion drum decline of water table to low low grade and the additional soft wa ter pump group all has fault, start Diesel engine pump, liquid level stops Diesel engine pump after rising to top grade; When the whole audience has a power failure, the Diesel engine pump in the additional soft wa ter pump group is started, and its soft water make-up pump group outlet pneumatic valve V4 closes; The disengaging of soft water Diesel engine pump is chain with liquid level; The little cover of air outlet supplies water always, to guarantee when this major accident takes place, keeping the cooling effect to little cover.
The make-up pump group comprises: the main feed water pump group, and the high-pressure water supply pump group, middle pressure make-up pump group, mesohigh pump group is communicated with pneumatic valve V1, accident current limliting pneumatic valve V2, main water pump bypass pneumatic valve V3 altogether.Make-up pump group safety control strategy comprise following some:
(21) four electric water pumps with the main feed water pump group use 2, in addition 2 subsequent use, add a Diesel engine pump as subsequent use.Three electric water pumps of high-pressure water supply pump group use 1, in addition 2 subsequent use.In press two electric water pumps of make-up pump group to use 1, in addition 1 subsequent use.Under the normal condition, middle and high pressure make-up pump group respectively has a water pump to be in running status, and the main feed water pump group has 2 electric water pumps in operation.Under the accident condition, just get into (22), just get into (23) if the main feed water pump group breaks down if mesohigh make-up pump group breaks down.
(22) mesohigh pump group is subsequent use mutually:
If the process pump of middle pressure make-up pump group breaks down, and its stand-by pump also breaks down, and first stand-by pump of high-pressure water supply pump group can start automatically, and simultaneously, the mesohigh pump group pneumatic valve V1 of UNICOM opens.In the middle of press the make-up pump group to have a pump to recover normal and operation after, the high-pressure water supply pump group can a stand-by pump out of service, the mesohigh pump group pneumatic valve V1 of UNICOM closes.
If the process pump fault of high-pressure water supply pump group, and two stand-by pumps be all can't normally start the time, and the stand-by pump of middle pressure make-up pump group starts automatically, and simultaneously, the mesohigh pump group pneumatic valve V1 of UNICOM opens.After the high-pressure water supply pump group has a pump to recover normal and moves, a middle pressure make-up pump group meeting stand-by pump out of service, the mesohigh pump group pneumatic valve V1 of UNICOM closes.
If the process pump fault of high-pressure water supply pump group, and two stand-by pumps all can't normally start, and the stand-by pump of middle pressure make-up pump group starts under the failure scenarios automatically, and the mesohigh pump group pneumatic valve V1 of UNICOM opens.After the high-pressure water supply pump group had a pump to recover normal and moves, the mesohigh pump group pneumatic valve V1 of UNICOM closed.
Under a variety of accident conditions, accident current limliting pneumatic valve V2 closes, and the system that can guarantee better supplies water for the user.The middle make-up pump group exit of pump pressure of pressing is less than high-pressure water supply pump group exit of pump pressure; When the water pump of high-pressure water supply pump group all can't move; No matter the middle make-up pump group of pressing has several pumps in operation; All close accident current limliting pneumatic valve V2, can guarantee the water consumption of overlapping in tuyere small sleeve and the air port to greatest extent.After the ruuning situation of all pump groups of this blast furnace soft water closed circulation cooling system was recovered normally, accident current limliting pneumatic valve V2 opened again.
(23) the main feed water pump group breaks down: when the main feed water pump group had only an electric water pump or electric water pump all can not move, Diesel engine pump started; If when all water pumps (containing Diesel engine pump) can't start, then open main feed water pump bypass pneumatic valve V3, guarantee the water route backflow; When any water pump wherein resumes operation, then close main feed water pump bypass pneumatic valve V3, bigger to guarantee pump group top hole pressure and throughput ratio.
To sum up, safety control strategy can accurately and timely successfully manage contingent various industrial accident, simultaneously,, provides accident alarming prompting and explanation in the state of accident.
Claims (3)
1. the method for controlling security of blast furnace soft water closed circulation cooling system is characterized in that comprising:
The additional soft wa ter safety control strategy makes the expansion drum liquid level remain on ordinary water level;
Make-up pump group safety control strategy makes main feed water pump group and supercharge pump group can keep the soft water supply of blast furnace soft water closed circulation cooling system in the state of accident, specifically may further comprise the steps:
(21) four electric water pumps with the main feed water pump group use 2, in addition 2 subsequent use, add a Diesel engine pump as subsequent use; Three electric water pumps of high-pressure water supply pump group use 1, in addition 2 subsequent use; In press two electric water pumps of make-up pump group to use 1, in addition 1 subsequent use; Under the normal condition, middle and high pressure make-up pump group respectively has a water pump to be in running status, and the main feed water pump group has 2 electric water pumps in operation; Under the accident condition, just get into (22), just get into (23) if the main feed water pump group breaks down if mesohigh make-up pump group breaks down;
(22) mesohigh pump group is subsequent use mutually:
If the process pump of middle pressure make-up pump group breaks down, and its stand-by pump also breaks down, and first stand-by pump of high-pressure water supply pump group can start automatically, and simultaneously, mesohigh pump group UNICOM pneumatic valve is opened; In the middle of press the make-up pump group to have a pump to recover normal and operation after, the high-pressure water supply pump group can a stand-by pump out of service, mesohigh pump group UNICOM pneumatic valve cuts out;
If the process pump fault of high-pressure water supply pump group, and two stand-by pumps be all can't normally start the time, and the stand-by pump of middle pressure make-up pump group starts automatically, and simultaneously, mesohigh pump group UNICOM pneumatic valve is opened; After the high-pressure water supply pump group has a pump to recover normal and moves, a middle pressure make-up pump group meeting stand-by pump out of service, mesohigh pump group UNICOM pneumatic valve cuts out;
If the process pump fault of high-pressure water supply pump group, and two stand-by pumps all can't normally start, and the stand-by pump of middle pressure make-up pump group starts under the failure scenarios automatically, and mesohigh pump group UNICOM pneumatic valve is opened; After the high-pressure water supply pump group had a pump to recover normal and moves, mesohigh pump group UNICOM pneumatic valve cut out;
When the water pump of high-pressure water supply pump group all can't move; No matter the middle make-up pump group of pressing has several pumps in operation; All close accident current limliting pneumatic valve, after the ruuning situation of all pump groups of this blast furnace soft water closed circulation cooling system was recovered normally, accident current limliting pneumatic valve was opened again;
(23) the main feed water pump group breaks down: when the main feed water pump group had only an electric water pump or electric water pump all can not move, Diesel engine pump started; If when all water pumps can't start, then open main feed water pump bypass pneumatic valve, guarantee the water route backflow; When any water pump wherein resumes operation, then close main feed water pump bypass pneumatic valve.
2. method of controlling security according to claim 1, it is characterized in that the additional soft wa ter safety control strategy comprise following some:
(11) with the expansion drum water level according to being divided into 5 grades from high to low: high, high and low, low and low low, setting ordinary water level is between top grade and the low grade;
(12) water level in detection soft water pond when its water level is low-grade or hangs down low grade, then stops the operation of additional soft wa ter pump group, otherwise gets into next step; And when receiving the low low-grade signal 5s in soft water pond, and its rate of change normal interval in the time, assert that just the signal that hangs down low grade is effective;
(13) detect the water level of expansion drum, confirm the running status of blast furnace soft water closed circulation cooling system, when said cooling system normally moves, the loss moisturizing; When said cooling system leaks, emergency water compensating; When expansion drum sensor signal fault, estimate moisturizing; When having water pump to go wrong in the additional soft wa ter pump group, launch the stand-by equipment moisturizing; When the water level of expansion drum was top grade, nitrogen valve was closed, and surplus valve is opened; When the non-height of the water level of expansion drum was high-grade, nitrogen valve was opened, and surplus valve cuts out; When handling, after additional soft wa ter pump group has water pump operation 5 seconds, open soft water make-up pump group outlet pneumatic valve again, before stopping last process pump, close the termination of pumping again of soft water make-up pump group outlet pneumatic valve earlier.
3. method of controlling security according to claim 2, it is characterized in that specifically comprising said (13) o'clock following some:
(131) detect the water level of expansion drum, confirm the running status of blast furnace soft water closed circulation cooling system; If normal operation gets into (132); If there is seepage in system, get into (133); When if the expansion drum sensor signal breaks down, get into (134); If occur the water pump problem when carrying out the first three disposition, get into (135);
(132) loss moisturizing: when said cooling system normally moved, along with system loss, the expansion drum decline of water table was to low-grade, and an electric water pump moisturizing that starts in the additional soft wa ter pump group is carried out the loss moisturizing, the pump of cutting off the water when water level rises to top grade;
(133) emergency water compensating: if the expansion drum decline of water table is to low low-grade; Illustrative system has seepage, except starting an electric water pump, increases an electric water pump emergency water compensating again; When water level rises to low grade, stop an electric water pump, when water level rises to top grade, stop all water pumps; If the expansion drum decline of water table starts Diesel engine pump to low-grade, when water level rises to low grade, stop Diesel engine pump, handle according to preceding method then;
(134) estimate moisturizing:
Be that following three kinds of situation are handled at first with expansion drum liquid level shelves signal distinguishing:
First: there is logical relation in five sensing switchs of expansion drum liquid level shelves itself, and high signal has, and then low signal must not have; High signal has, and then high signal has; Low low signal has, and then low, low signal has; Low low signal has, and then low signal has;
Second:, its Changing Pattern is carried out on-line study and record for high signal, low signal;
The 3rd: judge whether high signal frequently occurs, and saltus step;
Specifically handle then,, provide the indication of reporting to the police of expansion drum liquid level sensor switch fault when not satisfying first kind of situation or the 3rd step when obtaining affirmative determination; Get into simultaneously by the time and estimate the moisturizing control model, when estimating moisturizing and beginning, time of finishing of the last moisturizing of record distance this moment at first; And calculate time of moisturizing next time; Estimating under the moisturizing pattern, realizing replenishing certain water, during this period by the time; If it is normal that level switch recovers, then switch to by sensor signal moisturizing pattern;
(135) stand-by equipment moisturizing: if the electric water pump in expansion drum decline of water table to low low grade and the additional soft wa ter pump group all has fault, start Diesel engine pump, liquid level stops Diesel engine pump after rising to top grade; When the whole audience has a power failure, the Diesel engine pump in the additional soft wa ter pump group is started, and its soft water make-up pump group outlet pneumatic valve to cut out, the soft water Diesel engine pump breaks away from chain with liquid level, and the little cover of air outlet supplies water always, to keep the cooling effect to little cover.
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| CN2010102060206A CN101881960B (en) | 2009-12-22 | 2010-06-09 | Safety control strategy for blast furnace soft water sealing, circulating and cooling system |
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| CN200910273354.2 | 2009-12-22 | ||
| CN200910273354A CN101709345A (en) | 2009-12-22 | 2009-12-22 | Safety control strategy of blast furnace soft water airtight circulating cooling system |
| CN200910206787.6 | 2009-12-31 | ||
| CN200920353249.5 | 2009-12-31 | ||
| CN200920353249 | 2009-12-31 | ||
| CN200910206787A CN101736104A (en) | 2009-12-31 | 2009-12-31 | Blast-furnace soft water sealing and circulation cooling system |
| CN2010102060206A CN101881960B (en) | 2009-12-22 | 2010-06-09 | Safety control strategy for blast furnace soft water sealing, circulating and cooling system |
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| CN2010202349141U Expired - Fee Related CN201737957U (en) | 2009-12-22 | 2010-06-09 | Soft water closed circulation cooling system of blast furnace |
| CN2010102060206A Expired - Fee Related CN101881960B (en) | 2009-12-22 | 2010-06-09 | Safety control strategy for blast furnace soft water sealing, circulating and cooling system |
| CN2010102060348A Expired - Fee Related CN101864502B (en) | 2009-12-22 | 2010-06-09 | Blast furnace soft water closed circulation cooling system |
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| CN2010102060348A Expired - Fee Related CN101864502B (en) | 2009-12-22 | 2010-06-09 | Blast furnace soft water closed circulation cooling system |
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| CN (3) | CN201737957U (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103421917B (en) * | 2013-08-15 | 2015-01-14 | 北京首钢国际工程技术有限公司 | Blast furnace soft water closed-recirculation cooling system |
| TWI487792B (en) * | 2013-10-01 | 2015-06-11 | China Steel Corp | Blast Furnace Soft Water Closed Circulating Cooling System |
| TWI652349B (en) | 2017-11-28 | 2019-03-01 | 中國鋼鐵股份有限公司 | Cooling system and method for blast furnace |
| CN108193009B (en) * | 2017-12-31 | 2019-07-30 | 安徽马钢设备检修有限公司 | The cooling water system of hot-blast stove and control method |
| CN109340356A (en) * | 2018-10-26 | 2019-02-15 | 山东钢铁股份有限公司 | Diesel engine gear tank cooling device and cooling means |
| CN112251558B (en) * | 2020-10-22 | 2022-05-13 | 马鞍山钢铁股份有限公司 | Hot blast valve cooling water system capable of being switched on line |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2300654Y (en) * | 1997-04-18 | 1998-12-16 | 程玉良 | Monitor controller for blast furnace cooling water safety operation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0734110A (en) * | 1993-07-16 | 1995-02-03 | Nippon Steel Corp | Method for cooling wall of blast furnace |
| CN1049922C (en) * | 1996-03-30 | 2000-03-01 | 安阳钢铁集团有限责任公司 | Method for additionally cooling blast furnace bottom water |
| NL1008868C2 (en) * | 1997-12-19 | 1999-06-22 | Hoogovens Staal Bv | Repairing leaks in coolant channels of tuyere for blast furnace |
| JP2000297309A (en) * | 1999-04-12 | 2000-10-24 | Nippon Steel Corp | Cooling method with cooling strengthening stave cooler |
-
2010
- 2010-06-09 CN CN2010202349141U patent/CN201737957U/en not_active Expired - Fee Related
- 2010-06-09 CN CN2010102060206A patent/CN101881960B/en not_active Expired - Fee Related
- 2010-06-09 CN CN2010102060348A patent/CN101864502B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2300654Y (en) * | 1997-04-18 | 1998-12-16 | 程玉良 | Monitor controller for blast furnace cooling water safety operation |
Non-Patent Citations (2)
| Title |
|---|
| 周文.《武钢1号高炉软水密闭循环冷却技术分析》.《冶金动力》.2003,(第6期),第54-56页. * |
| 张雪敏.《自动控制技术在高炉炉顶膨胀罐上的应用》.《安徽冶金》.2007,(第4期),第16-19页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101881960A (en) | 2010-11-10 |
| CN101864502A (en) | 2010-10-20 |
| CN101864502B (en) | 2012-05-23 |
| CN201737957U (en) | 2011-02-09 |
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