CN102864255B - Safety control method for blast furnace minter process slag treatment granulation water supply system - Google Patents
Safety control method for blast furnace minter process slag treatment granulation water supply system Download PDFInfo
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- CN102864255B CN102864255B CN2012103486173A CN201210348617A CN102864255B CN 102864255 B CN102864255 B CN 102864255B CN 2012103486173 A CN2012103486173 A CN 2012103486173A CN 201210348617 A CN201210348617 A CN 201210348617A CN 102864255 B CN102864255 B CN 102864255B
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Abstract
The invention provides a safety control method for a blast furnace minter process slag treatment granulation water supply system. The safety control method comprises the following steps of: (1) setting a system, i.e., presetting the number of working pumps required by normal work and the number of standby pumps required for normal work, presetting each parameter index and presetting duration for each parameter exceeding a preset index range; (2) acquiring a signal; (3) pre-starting state control; (4) controlling an operation state; and (5) ending state control, i.e., closing if an accidental water pipe pneumatic value is in an open state at the end of iron discharge. According to the safety control method, technological actual conditions are closely combined, a key parameter is selected to be monitored in real time, automatic processing is performed on the monitored parameter, double control is performed in pre-starting and operation processes, self-protection of the granulation water supply system is realized, high early warning and accident handling capacities are achieved, the stability of the system is improved, and the operation cost of the system is reduced.
Description
Technical field
The invention belongs to blast furnace Ming Tefa slag disposal system field, be specifically related to a kind of blast furnace Ming Tefa slag and process granulation waterworks method of controlling security.
Background technology
The granulation waterworks is the important component part of blast furnace Ming Tefa slag disposal system, and it is being born is the mission critical that blast-furnace slag carries out water treatment, with blast furnace safety, produces closely related.In a single day the granulation waterworks goes wrong, and can not rationally process or find early, and the serious threat blast furnace is produced, and causes huge financial loss.Therefore, the granulation waterworks is carried out necessary safety control extremely urgent.
At present; there is the problem of following several classes in the granulation waterworks: first; due to granulation water supply pump system operating parameter is lacked necessary analysis; the granulation waterworks can't in time detect and prevent the fault of granulation waterworks, thereby can't meet the preventive maintenance requirement in the blast furnace continuous flow procedure.The second, fault handling and the control strategy of granulation working shaft group are too simple, cause the rate of load condensate serious unbalance of pump group inside, thereby have improved the running cost of system, have a strong impact on stability and the life-span of system.The 3rd, the control sequential of accident water pipe pneumavalve is unreasonable, is difficult to bring into play the emergency capability of processing accident.Therefore, blast furnace Ming Tefa slag is processed the safety control research of granulation waterworks and is applied extremely urgent.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of blast furnace Ming Tefa slag to process granulation waterworks method of controlling security; can realize certainly processing and the self-shield of equipment of certainly the detecting of system operational parameters, data, thereby guarantee the stability and security of granulation waterworks.
The present invention solves the problems of the technologies described above the technical scheme of taking to be: a kind of blast furnace Ming Tefa slag is processed granulation waterworks method of controlling security, and it is characterized in that: it comprises the following steps:
1) system setting: according to the processing requirement of granulation waterworks normal operation, the required working barrel number of units of default normal operation and the required stand-by pump number of units of normal operation, be working barrel number of units preset value and stand-by pump number of units preset value, working barrel number of units preset value and stand-by pump number of units preset value sum equal field erected granulation pump sum;
All granulation pumps in system are done priority level initializing, according to priority, working barrel number of units preset value and stand-by pump number of units preset value, select the granulation pump as real work pump and stand-by pump;
Default each parameter index, comprise pump motor bearing temperature index, pump discharge arm pressure index and outfall sewer pressure index, and default each parameter exceeds the time length of default indication range;
2) signals collecting: bearing temperature, pump discharge arm force value, outfall sewer force value, pump breaker open operation signal, pump motor soft initiator trouble signal, pump motor run signal, the accident water pipe pneumavalve run signal of real-time testing pump motor;
3) wanting starting state controls: judge whether the granulation pump is in malfunction, if unfaulty conditions granulation pump, the pump number of units that namely is in non-malfunction equals working barrel number of units preset value and stand-by pump number of units preset value sum, according to priority select working barrel from the pump of non-malfunction, the granulation pump of all the other non-malfunctions is stand-by pump; Otherwise report to the police;
4) running status is controlled: the granulation pump that is defined as working barrel at the wish starting state starts operation simultaneously, thereby enter pump group running status, 4.1) judge whether the granulation pump is in malfunction, if unfaulty conditions granulation pump, the granulation pump number of units that namely is in non-malfunction equals working barrel number of units preset value and stand-by pump number of units preset value sum, alarm free signal, otherwise report to the police; 4.2) according to the working barrel outlet stool force value that detects in real time, outfall sewer force value and the parameter index comparative result of presetting, and the comparative result between real work pump number of units and working barrel number of units preset value, the unlatching of control accident water pipe pneumavalve or close;
5) done state is controlled: 5.1) tap a blast furnace while finishing,, if accident water pipe pneumavalve is opened condition, close; 5.2) tap a blast furnace while finishing, the working barrel when pump group running status will stop simultaneously;
Described granulation failure of pump state comprises: the real-time bearing temperature of pump motor is higher than pump motor bearing temperature index and the lasting scheduled time; Pump breaker open operation signal appears in pump motor; The soft initiator trouble signal appears in pump motor; Pump motor is in the situation that run signal exists, and pump discharge arm force value is lower than pump discharge arm pressure index and the lasting scheduled time.
Press such scheme, described priority is divided into 2 grades, and the first step is according to the sequence of temperature accumulated value, and the second stage is to set artificial the intervention; The periodic temperature value that obtains each granulation pump, and they are added up and obtain the temperature accumulated value.Cumulative self the temperature value of each working barrel, according to the height sequence of temperature accumulated value separately, the temperature accumulated value is lower, and is higher as the priority of working barrel; Correspondingly, cumulative self the temperature value of each stand-by pump, according to the height sequence of temperature accumulated value separately, the temperature accumulated value is lower, and is higher as the priority of stand-by pump; When equating, first step priority compares the second stage, by artificial setting.
Press such scheme, type of alarm concrete in described step 3) comprises:
3.1) be less than working barrel number of units preset value if be in the granulation pump quantity of non-malfunction, make the granulation pump of non-malfunction be working barrel,, without stand-by pump, send the working barrel number of units not and without the guard signal of stand-by pump;
3.2) equal working barrel number of units preset value if be in the pump number of units of non-malfunction, make the granulation pump of non-malfunction be working barrel,, without stand-by pump, send the enough but guard signal that can use without stand-by pump of working barrel number of units;
3.3) if the granulation pump number of units that is in non-malfunction greater than working barrel number of units preset value; and less than working barrel number of units preset value and stand-by pump number of units preset value sum; according to priority select working barrel from the granulation pump of non-malfunction; the granulation pump of all the other non-malfunctions is stand-by pump, sends working barrel quantity enough and stand-by pump is arranged but the inadequate guard signal of stand-by pump quantity.
Press such scheme, described step 4.1) in concrete type of alarm comprise:
Be less than working barrel number of units preset value if a) be in the granulation pump number of units of non-malfunction, the guard signal of sending the working barrel number of units not and can using without stand-by pump; B) equal working barrel number of units preset value if be in the granulation pump number of units of non-malfunction, send the enough but guard signal that can use without stand-by pump of working barrel quantity; C) if the granulation pump number of units that is in non-malfunction, greater than working barrel number of units preset value, and less than working barrel number of units preset value and stand-by pump number of units preset value sum, is sent working barrel quantity enough and stand-by pump is arranged but the inadequate guard signal of stand-by pump quantity; D) state and have stand-by pump if working barrel breaks down in operational process, will start stand-by pump according to priority, and reason shut down in record.
Press such scheme, when the warning of sending working barrel quantity not and can use without stand-by pump, if occur neither the also unfaulty conditions pump of non-stand-by pump of working barrel becomes working barrel with it and puts into operation; When sending the enough but warning that can use without stand-by pump of working barrel quantity, if occur neither the also unfaulty conditions pump of non-stand-by pump of working barrel becomes stand-by pump with it; Working barrel quantity is enough and stand-by pump is arranged but during the inadequate warning of stand-by pump quantity when sending, if occur neither working barrel also the unfaulty conditions pump of non-stand-by pump will become stand-by pump.
Press such scheme, described step 4.2) in the unlatching of control accident water pipe pneumavalve or the concrete mode of closing comprise:
E) when the working barrel outlet stool force value of real-time detection, outfall sewer force value within default parameter index scope and the working barrel number of units equal working barrel number of units preset value, make accident water pipe pneumavalve keep closing condition for accident water pipe pneumavalve transmitted signal; F) when sending guard signal, if working barrel outlet stool or outfall sewer force value lower than preset value and lasting Preset Time, or the working barrel number of units is less than working barrel number of units preset value, unlatching accident water pipe pneumavalve.
Press such scheme, pump motor bearing temperature index comprises the high value of temperature, the high value of temperature; Suction well water level index index comprises the high value of liquid level, liquid level low value; Pump discharge arm pressure index comprises a pipe pressure low value; Outfall sewer force value index comprises total pipe pressure low value.
Press such scheme, the time length that default each parameter exceeds default indication range is 5s.
Press such scheme, when this end of tapping a blast furnace, described temperature accumulated value data keep, and want starting state control step while as next time, tapping a blast furnace and determine the foundation of working barrel and stand-by pump.
Press such scheme, during arranging, system also presets the parameter index of suction well water level, signals collecting also detects the suction well water level value in real time, want that starting state is controlled and running status also judges respectively that the suction well water level value of Real-time Collection is whether in its default parameter index, if in warning in controlling.
Beneficial effect of the present invention is:
1, the close combined process of the present invention is actual; choose key parameter and give Real Time Monitoring; monitoring parameter is processed automatically; carry out dual control in wanting start-up and operation (startup) process; realized the self-shield of granulation waterworks; have stronger early warning and capability in handling accident, improved the stability of system, reduced the running cost of system.
2, the present invention adopts two-stage priority, take the temperature accumulated value as the first priority, can embody pump motor actual motion state and inner febrile state, the higher explanation pump motor of temperature accumulated value rate of load condensate is high, preferred temperature accumulated value low as working barrel, frequency of utilization that can balanced pump motor; In the situation that first step priority is identical, carry out the artificial second stage priority ratio of setting, make the priority setting more perfect.
3, according to the actual process demand, each parameter index is carried out concrete division, the combination of different threshold values or threshold value and corresponding guard signal, executive signal are interrelated, various situations are taken measures respectively, with become more refinement, comprehensively of intelligent control.
4, through overtesting, obtain preferred parameter preset value, make intelligent control become more reasonable.
5, the data of system each run are preserved and are used, the reference frame as before operation next time, be conducive to the maintenance of system.
Description of drawings
Fig. 1 is the layout schematic diagram of signal pickup assembly in the granulation waterworks.
Fig. 2 is the hardware configuration functional block diagram of one embodiment of the invention.
Fig. 3 is the control flow chart of one embodiment of the invention.
Embodiment
The present invention will be further described below in conjunction with specific examples and accompanying drawing.
Fig. 2 is the hardware configuration functional block diagram of one embodiment of the invention, it comprises signal pickup assembly, (the present embodiment is the PLC controller to be used for the controller that the data of signal pickup assembly collection are processed, be the FPGA controller), the topworks that is used for control accident water pipe pneumavalve switch and/or granulation working shaft internal pump motor switch, be used for sending according to the data that controller is processed the monitoring device (the present embodiment is supervisory control computer) of steering order, signal pickup assembly is connected with the input terminus of controller, the output terminal of controller is connected with topworks, the control end of controller is connected with monitoring device.Described topworks is the conventional controller spares such as isolating switch, thermo-relay, soft initiator, can be arranged in housing.
Fig. 1 is the layout schematic diagram of signal pickup assembly in the granulation waterworks, and the granulation waterworks comprises suction well, suction well and N
1+ N
2The bar exit branch connects, and every exit branch connects a granulation working shaft, and all granulation water supply delivery side of pumps are connected with outfall sewer, and outfall sewer is provided with the outfall sewer pressure switch, and outfall sewer is connected with accident water by accident water pipe pneumavalve; Signal pickup assembly comprises liquidometer, the pressure-detecting device that is arranged on each granulation working shaft outlet stool that is arranged in suction well, the pressure-detecting device that is arranged on granulation working shaft group outfall sewer, the pump motor temperature-detecting device that is arranged on each granulation working shaft inside, granulation working shaft breaker open operation signal supervisory instrument, pump motor soft initiator trouble signal proofing unit and pump motor run signal proofing unit.
In granulation waterworks working process, carry water as main take granulation pump group, accident water pipe pneumavalve is only opened in the non-normal working process.Under normal operation, granulation working shaft group is a kind of N
1Platform granulation working shaft work (being working barrel), N
2The pattern of platform granulation working shaft standby (being stand-by pump), i.e. N
1Work N
2Standby pattern, (N
1+ N
2) be the total number of units of field erected granulation working shaft.In granulation working shaft group start-up course, all pumps of working barrel group are to accept simultaneously startup command.In granulation working shaft group stopped process, all pumps of working barrel group are accepted to cease and desist order simultaneously.If in the granulation water supply process, the actual number of units of working barrel does not reach N
1Platform, can't guarantee flushing cinder effect (slag can't granulation and form bulk, rushes motionlessly, piles up to get up to be difficult to and gets rid of).At the situation that guarantees energy-conserving and environment-protective and process requirements, N in granulation waterworks working process
1The work of platform granulation working shaft is optimal situation.If the real work number of units of granulation working shaft is greater than N
1Although, guaranteed the flushing cinder effect, do not reach the requirement of energy-conserving and environment-protective.If the real work number of units of granulation working shaft is less than N
1, the flushing cinder effect is undesirable, and N
1Larger with the difference of real work pump number of units, the flushing cinder effect is more undesirable, also just more can't meet processing requirement.
Fig. 3 is the control flow chart of one embodiment of the invention, and it comprises the following steps:
1) system setting: according to the processing requirement of granulation waterworks normal operation, the required working barrel number of units of default normal operation and the required stand-by pump number of units of normal operation, be working barrel number of units preset value and stand-by pump number of units preset value, working barrel number of units preset value and stand-by pump number of units preset value sum equal field erected granulation pump sum; All granulation pumps in system are done priority level initializing, according to priority, working barrel number of units preset value and stand-by pump number of units preset value, select the granulation pump as real work pump and stand-by pump; Default each parameter index, comprise pump motor bearing temperature index, suction well water level index, pump discharge arm pressure index and outfall sewer pressure index, default each parameter exceeds the time length of default indication range, the time length that predeterminable each parameter exceeds default indication range is 5s, also can preset respectively according to practical situation or experience.
Described priority is divided into 2 grades, and the first step is according to the sequence of temperature accumulated value, and the second stage is to set artificial the intervention; The periodic temperature value that obtains each granulation pump, and they are added up and obtain the temperature accumulated value.Cumulative self the temperature value of each working barrel, according to the height sequence of temperature accumulated value separately, the temperature accumulated value is lower, and is higher as the priority of working barrel; Correspondingly, cumulative self the temperature value of each stand-by pump, according to the height sequence of temperature accumulated value separately, the temperature accumulated value is lower, and is higher as the priority of stand-by pump; When equating, first step priority compares the second stage, by artificial setting.
2) signals collecting: bearing temperature, pump discharge arm force value, outfall sewer force value, pump breaker open operation signal, pump motor soft initiator trouble signal, pump motor run signal, the accident water pipe pneumavalve run signal of real-time testing pump motor.
3) wanting starting state controls: judge whether the granulation pump is in malfunction, if unfaulty conditions granulation pump, the pump number of units that namely is in non-malfunction equals working barrel number of units preset value and stand-by pump number of units preset value sum, according to priority select working barrel from the pump of non-malfunction, the granulation pump of all the other non-malfunctions is stand-by pump; Otherwise report to the police.
Type of alarm concrete in step 3) comprises: 3.1) if be in the granulation pump quantity of non-malfunction, be less than working barrel number of units preset value, make the granulation pump of non-malfunction be working barrel,, without stand-by pump, send the working barrel number of units not and without the guard signal of stand-by pump; 3.2) equal working barrel number of units preset value if be in the pump number of units of non-malfunction, make the granulation pump of non-malfunction be working barrel,, without stand-by pump, send the enough but guard signal that can use without stand-by pump of working barrel number of units; 3.3) if the granulation pump number of units that is in non-malfunction greater than working barrel number of units preset value; and less than working barrel number of units preset value and stand-by pump number of units preset value sum; according to priority select working barrel from the granulation pump of non-malfunction; the granulation pump of all the other non-malfunctions is stand-by pump, sends working barrel quantity enough and stand-by pump is arranged but the inadequate guard signal of stand-by pump quantity.
4) running status is controlled: the granulation pump that is defined as working barrel at the wish starting state starts operation simultaneously, thereby enter pump group running status, 4.1) judge whether the granulation pump is in malfunction, if unfaulty conditions granulation pump, the granulation pump number of units that namely is in non-malfunction equals working barrel number of units preset value and stand-by pump number of units preset value sum, alarm free signal, otherwise report to the police; 4.2) according to the working barrel outlet stool force value that detects in real time, outfall sewer force value and the parameter index comparative result of presetting, and the comparative result between real work pump number of units and working barrel number of units preset value, the unlatching of control accident water pipe pneumavalve or close.
Described step 4.1) type of alarm concrete in comprises: be less than working barrel number of units preset value if a) be in the granulation pump number of units of non-malfunction, the guard signal of sending the working barrel number of units not and can using without stand-by pump; B) equal working barrel number of units preset value if be in the granulation pump number of units of non-malfunction, send the enough but guard signal that can use without stand-by pump of working barrel quantity; C) if the granulation pump number of units that is in non-malfunction, greater than working barrel number of units preset value, and less than working barrel number of units preset value and stand-by pump number of units preset value sum, is sent working barrel quantity enough and stand-by pump is arranged but the inadequate guard signal of stand-by pump quantity; D) state and have stand-by pump if working barrel breaks down in operational process, will start stand-by pump according to priority, and reason shut down in record.
When the warning of sending working barrel quantity not and can use without stand-by pump, if occur neither the also unfaulty conditions pump of non-stand-by pump of working barrel becomes working barrel with it and puts into operation; When sending the enough but warning that can use without stand-by pump of working barrel quantity, if occur neither the also unfaulty conditions pump of non-stand-by pump of working barrel becomes stand-by pump with it; Working barrel quantity is enough and stand-by pump is arranged but during the inadequate warning of stand-by pump quantity when sending, if occur neither working barrel also the unfaulty conditions pump of non-stand-by pump will become stand-by pump.
Described step 4.2) in, the unlatching of control accident water pipe pneumavalve or the concrete mode of closing comprise: e) when the working barrel outlet stool force value of real-time detection, outfall sewer force value within default parameter index scope and the working barrel number of units equal working barrel number of units preset value, make accident water pipe pneumavalve keep closing condition for accident water pipe pneumavalve transmitted signal; F) when sending guard signal, if working barrel outlet stool or outfall sewer force value lower than preset value and lasting Preset Time, or the working barrel number of units is less than working barrel number of units preset value, unlatching accident water pipe pneumavalve.
5) done state is controlled: 5.1) tap a blast furnace while finishing,, if accident water pipe pneumavalve is opened condition, close; 5.2) tap a blast furnace while finishing, the working barrel when pump group running status will stop simultaneously.
Described granulation failure of pump state comprises: the real-time bearing temperature of pump motor is higher than pump motor bearing temperature index and the lasting scheduled time; Pump breaker open operation signal appears in pump motor; The soft initiator trouble signal appears in pump motor; Pump motor is in the situation that run signal exists, and pump discharge arm force value is lower than pressure low value and the lasting scheduled time.
Choosing and the detection system unit design of key parameter:
The persistent fever of pump motor inside can have a strong impact on the life-span of pump motor, the reacting condition of pump motor temperature the working efficiency of pump and the variation of operating mass,, so adopt Thermistor Temperature Measurement, guarantee precision and response speed.
The suction well water level should remain on normal liquid level (normal liquid level is between low liquid level and high liquid level), when liquid level is too low, will cause pump motor to find time, and has a strong impact on the life-span of motor, therefore adopt radar level instrumentation liquid level.When liquid level is too high, will cause the overflow of suction well water, cause security incident.
Pump discharge props up that pipe pressure is low and outfall sewer pressure is low, illustrate that water supply pump system exists drainage or pump motor fault, therefore employing anti-corrosive type intelligent pressure controller is monitored force value.
Granulation working shaft group is the visual plant that blast furnace Ming Tefa slag is processed; it is the power source of flushing cinder water; expensive; it is protected be the most important thing; therefore, pump breaker open operation signal, pump motor soft initiator trouble signal, pump motor run signal all should be chosen to be important detect parameters.
The control strategy of the present embodiment comprise following some:
1) signal pickup assembly comprises liquid level detection device, granulation working shaft motor temperature proofing unit, pump discharge arm pressure-detecting device and outfall sewer pressure-detecting device.In the present embodiment, liquid level detection device adopts radar level gauge; Granulation working shaft motor temperature proofing unit adopts hot resistance (Pt100); Pump discharge arm pressure-detecting device adopts the anti-corrosive type intelligent pressure controller; The outfall sewer pressure-detecting device adopts the anti-corrosive type intelligent pressure controller.
2) signals collecting and warning: the state of pump group is divided into wants starting state and operation (startup) state.No matter the pump group is in the wish starting state is still moved (startup) state, all bearing temperature, suction well water level value, pump discharge arm force value, outfall sewer force value, pump breaker open operation signal, pump motor soft initiator trouble signal, pump motor run signal, the accident water pipe pneumavalve run signal of real-time testing pump motor.
Default granulation working shaft motor bearings temperature value index, suction well water level index, pump discharge arm pressure index and outfall sewer pressure index; And, according to the state of pump group, above-mentioned four parameter indexs are carried out corresponding acquired signal report to the police.
Granulation working shaft motor bearings temperature value index has: the high value (being generally 135 ℃) of temperature, the high value (being generally 95 ℃) of temperature; Suction well water level index has: the high value of liquid level, this value=pump motor water inlet pipe height+(5～6) m, the low low value of liquid level, this value=pump motor water inlet pipe height+(0.5～1) m, liquid level low value, this value=pump motor water inlet pipe height+(1～2) m, pump motor water inlet pipe height is generally than high at the bottom of pond (0.5～1) m, and unit is m; The depth of water engineering size of suction well is generally 7～8m, and the present embodiment is analyzed with certain application example depth of water 7m of steel mill, and the shaft bottom absolute altitude is-7m, and well head elevation is 0m, and the low low value of liquid level be-5.5m that the liquid level low value be-4.5m that high value of liquid level is-0.5m.
Pump discharge arm pressure index: a pipe pressure low value (be generally 0.35Mpa, this value is adjustable), unit is Mpa.
Outfall sewer force value index: total pipe pressure low value (be generally 0.25Mpa, this value is adjustable), unit is Mpa.
The time length that default each parameter exceeds default indication range is 5s, and the reason of 5s is set here, is the error signal for the Filter Examination element.
The warning of acquired signal is divided into two kinds of situations: when the pump group is in the wish starting state, only alarm operation is carried out in bearing temperature, the suction well water level value of pump motor, other signal only gathers and does not report to the police; That is to say, when the pump group is in while wanting starting state, if the bearing temperature of pump motor, the suction well water level value exceeds default indication range and the lasting scheduled time is sent guard signal; When other signal exceeds default indication range and the lasting scheduled time is not sent guard signal.This is that the pump discharge arm force value of this moment and outfall sewer force value are reported to the police nonsensical because when the pump group was in wish starting state (pump group off-duty), pump discharge arm force value and outfall sewer force value were almost 0Mpa.When the pump group is in running status, bearing temperature, suction well water level value, working barrel outlet stool force value, the outfall sewer force value of pump motor are carried out alarm operation; That is to say, when the pump group is in running status, if the bearing temperature of pump motor, suction well water level value, working barrel outlet stool force value, outfall sewer force value exceed default indication range and the lasting scheduled time is sent guard signal.This is that working barrel outlet stool force value and outfall sewer force value can reflect the actual motion state of granulation working shaft group because when the pump group is in starting state (operation of pump group).
3) following situation is called pump motor and is in malfunction: 1. the real-time bearing temperature of pump motor, greater than 5s, arranges the reason of 5s higher than the high high value of temperature and time length here, is the error signal of Filter Examination element; 2. pump breaker open operation signal appears in pump motor; 3. the soft initiator trouble signal appears in pump motor; 4. pump motor is in the situation that run signal exists, and pump discharge arm force value continues 5s lower than the pressure low value, and the reason that 5s is set here is the error signal for the Filter Examination element; , when the pump motor state of breaking down can't start or shut down, need record to shut down reason.The unfaulty conditions pump motor is the prerequisite of working barrel or stand-by pump.
1), 2), 3) and the described safety control strategy that has formed the acquired signal processing of bar.
4) under the prerequisite that guarantees energy-conserving and environment-protective and As soon as possible Promising Policy processing requirement, formulate the principle that pump priority and working barrel and stand-by pump are determined:
A. be defined as follows variable: N
1For the number of units of the required working barrel that works, N
2For the number of units of the required stand-by pump that works, N
3For the number of units of physical presence unfaulty conditions pump, (N
1+ N
2) be the total number of units of field erected granulation working shaft; The corresponding temperature value of pump motor is T
pi, i=1～(N wherein
1+ N
2);
B. give (N
1+ N
2) the corresponding distribution (N of individual pump motor
1+ N
2) individual one-level priority A
pi(temperature accumulated value, this value embody the actual heating situation of granulation working shaft),
T
pi(t) refer to i# pump motor t motor temperature value constantly; k
i(t) refer to i# pump motor t running status sign constantly, when i# pump motor t is in running status constantly, k
i(t)=1, otherwise be 0; I=1～(N wherein
1+ N
2), A
piBe worth littlely, one time priority is higher.T is the time, processes the operation of granulation waterworks from blast furnace slag and starts to carry out timing, can distribute a soft timer to carry out timing to t in PLC.
C. give (N
1+ N
2) the corresponding distribution (N of individual pump motor
1+ N
2) individual secondary priority B
pi(human intervention value), with numeral 1～(N
1+ N
2) people is for distributing to B
p1～B
P (N1+N2)), secondary priority B
piCorresponding value is less, and its secondary priority is higher, wherein i=1～(N
1+ N
2).
D. high pump of priority, the priority of pump are just high, need not to carry out the secondary priority ratio; For the identical pump of priority, need to carry out the secondary priority ratio, the pump that secondary priority is higher, the priority of pump is just high.In pump group operational process, when working barrel is in malfunction, stand-by pump needs to start according to the priority, namely it will become the inoperative pump when a working barrel breaks down state, if there is stand-by pump this moment, the pump startup that stand-by pump group medium priority is the highest, the stand-by pump of startup becomes working barrel.
5) when the commencing signal that taps a blast furnace of receiving the blast furnace casting field system and sending here, the PLC Controlling System is sent slag and is processed commencing signal, and granulation working shaft group is prepared operation, and this moment, the pump group was in the wish starting state.Want starting state in the pump group, at first need the safety control strategy of processing according to acquired signal, to N
3The pump motor of platform unfaulty conditions carries out prioritization,, in order to for the operation of granulation working shaft group, determine working barrel and stand-by pump, has following four kinds of situations here: the first, work as N
3＜N
1The time, this N
3Platform unfaulty conditions pump is working barrel, and the stand-by pump number of units is zero, the warning of sending working barrel quantity this moment not and can use without stand-by pump; The second, work as N
3=N
1The time, this N
3Platform unfaulty conditions pump is working barrel, and the stand-by pump number of units is zero, sends the enough but warning that can use without stand-by pump of working barrel quantity this moment; The 3rd, as (N
2+ N
1) N
3N
1The time, N here
1For the number of units of working barrel, need to be from N
3Select the front N of pump priority arrangement in platform unfaulty conditions pump
1Pump be working barrel, except this N
1Unfaulty conditions pump beyond the platform working barrel is stand-by pump, and number of units is (N
3-N
1), send working barrel quantity this moment enough and stand-by pump arranged but the inadequate warning of stand-by pump quantity; The 4th, work as N
3=N
1+ N
2The time, N here
1For the number of units of working barrel, need to be from N
3In select N before the pump priority arrangement
1Pump be working barrel, except this N
1Unfaulty conditions pump beyond the platform working barrel is stand-by pump, and number of units is N
2, this moment, working barrel quantity and stand-by pump quantity all met the demands, alarm free; After the number of units of working barrel and stand-by pump determined, the working barrel that determines at the wish starting state started simultaneously, can put into the pump group operation phase.This described safety control strategy of wanting starting state for the pump group.
6) the pump group is when running status, and originally the pump of unfaulty conditions may break down, and originally has the pump unit of malfunction also may recover unfaulty conditions because of on-call maintenance simultaneously, has following situation here: the first, work as N
3＜N
1The time, N here
3Be the working barrel number of units, the stand-by pump number of units is 0, the warning of sending working barrel quantity not and can use without stand-by pump, this moment if there is neither working barrel also the unfaulty conditions pump of non-stand-by pump directly become working barrel and put into operation; The second, work as N
3=N
1The time, N here
3Be the working barrel number of units, the stand-by pump number of units is 0, sends the enough but warning that can use without stand-by pump of working barrel quantity, this moment if there is neither working barrel also the unfaulty conditions pump of non-stand-by pump will become stand-by pump; The 3rd, as (N
2+ N
1) N
3N
1The time, N here
1Be the working barrel number of units, the number of units of stand-by pump is (N
3-N
1), send working barrel quantity enough and stand-by pump is arranged but the inadequate warning of stand-by pump quantity, this moment if there is neither working barrel also the unfaulty conditions pump of non-stand-by pump will become stand-by pump; The 4th, work as N
3=N
1+ N
2The time, N here
1Be the working barrel number of units, the number of units of stand-by pump is N
2, this moment, working barrel quantity and stand-by pump quantity all met the demands, alarm free; The 5th, the state and while having stand-by pump, stand-by pump will start according to priority if working barrel breaks down in operational process, and reason shut down in record.That is to say, in operational process, the working barrel that breaks down becomes the inoperative pump, and the stand-by pump that starts according to priority becomes working barrel, and reason shut down in record; This described is the safety control strategy of pump group running status.
7) the pump group is when running status, and the running status of pump group keeps always, until the end signal that taps a blast furnace occurs, slag processing immediately finishes, and the pump as working barrel when pump group running status is simultaneously out of service.
8) accident water pipe pneumavalve will be opened in following two kinds of situations: the first, in pump group operational process, work as N
3＜N
1The time, N here
3Be the working barrel number of units, illustrate that this moment, working barrel quantity did not reach the normal operation requirement, need accident water pipe pneumavalve to supplement flow; The second, in pump group operational process, when occurring that working barrel props up the low warning of pipe pressure or the low warning of outfall sewer pressure, need accident water pipe pneumavalve to supplement flow;
9) accident water pipe pneumavalve will cut out in following two kinds of situations: first, while when tapping a blast furnace, finishing, the accident water pipe pneumavalve of having opened will cut out, and this is to be flushing cinder process makeup water stream because of accident water pipe pneumavalve, also be granulation working shaft group when operation makeup water stream; The second, in granulation working shaft group operational process, work as N
3〉=N
1(N here
1Be the working barrel number of units, the number of units of stand-by pump is (N
3-N
1)) and do not occur that working barrel props up the low warning of pipe pressure or outfall sewer pressure hangs down while reporting to the police, the accident water pipe pneumavalve of having opened will cut out;
To sum up; the present invention proposes a kind of blast furnace Ming Tefa slag and process granulation waterworks method of controlling security; under the prerequisite of analysing in depth the important operating parameter characteristic of granulation waterworks and process characteristic; completed the design of granulation waterworks safety control system;, with the action logic of each equipment of granulation waterworks and the close combination of Real Time Monitoring parameter of automatically processing, ensured the steady running of blast furnace Ming Tefa slag processing granulation waterworks and reported to the police in advance.
Claims (9)
1. a blast furnace Ming Tefa slag is processed granulation waterworks method of controlling security, and it is characterized in that: it comprises the following steps:
1) system setting: according to the processing requirement of granulation waterworks normal operation, the required working barrel number of units of default normal operation and the required stand-by pump number of units of normal operation, be working barrel number of units preset value and stand-by pump number of units preset value, working barrel number of units preset value and stand-by pump number of units preset value sum equal field erected granulation pump sum;
All granulation pumps in system are done priority level initializing, according to priority, working barrel number of units preset value and stand-by pump number of units preset value, select the granulation pump as real work pump and stand-by pump;
Default each parameter index, comprise pump motor bearing temperature index, pump discharge arm pressure index and outfall sewer pressure index, and default each parameter exceeds the time length of default indication range;
2) signals collecting: bearing temperature, pump discharge arm force value, outfall sewer force value, pump breaker open operation signal, pump motor soft initiator trouble signal, pump motor run signal, the accident water pipe pneumavalve run signal of real-time testing pump motor;
3) wanting starting state controls: judge whether the granulation pump is in malfunction, if unfaulty conditions granulation pump, the pump number of units that namely is in non-malfunction equals working barrel number of units preset value and stand-by pump number of units preset value sum, according to priority select working barrel from the pump of non-malfunction, the granulation pump of all the other non-malfunctions is stand-by pump; Otherwise report to the police;
4) running status is controlled: the granulation pump that is defined as working barrel at the wish starting state starts operation simultaneously, thereby enter pump group running status, 4.1) judge whether the granulation pump is in malfunction, if unfaulty conditions granulation pump, the granulation pump number of units that namely is in non-malfunction equals working barrel number of units preset value and stand-by pump number of units preset value sum, alarm free signal, otherwise report to the police; 4.2) according to the working barrel outlet stool force value that detects in real time, outfall sewer force value and the parameter index comparative result of presetting, and the comparative result between real work pump number of units and working barrel number of units preset value, the unlatching of control accident water pipe pneumavalve or close;
5) done state is controlled: 5.1) tap a blast furnace while finishing,, if accident water pipe pneumavalve is opened condition, close; 5.2) tap a blast furnace while finishing, the working barrel when pump group running status will stop simultaneously;
Described granulation failure of pump state comprises: the real-time bearing temperature of pump motor is higher than pump motor bearing temperature index and the lasting scheduled time; Pump breaker open operation signal appears in pump motor; The soft initiator trouble signal appears in pump motor; Pump motor is in the situation that run signal exists, and pump discharge arm force value is lower than pump discharge arm pressure index and the lasting scheduled time;
During arranging, system also presets the parameter index of suction well water level, signals collecting also detects the suction well water level value in real time, want that starting state is controlled and running status also judges respectively that the suction well water level value of Real-time Collection is whether in its default parameter index, if in warning in controlling.
2. blast furnace Ming Tefa slag according to claim 1 is processed granulation waterworks method of controlling security, and it is characterized in that: described priority is divided into 2 grades, and the first step is according to the sequence of temperature accumulated value, and the second stage is to set artificial the intervention; The periodic temperature value that obtains each granulation pump, and they are added up and obtain the temperature accumulated value; Cumulative self the temperature value of each working barrel, according to the height sequence of temperature accumulated value separately, the temperature accumulated value is lower, and is higher as the priority of working barrel; Correspondingly, cumulative self the temperature value of each stand-by pump, according to the height sequence of temperature accumulated value separately, the temperature accumulated value is lower, and is higher as the priority of stand-by pump; When equating, first step priority compares the second stage, by artificial setting.
3. blast furnace Ming Tefa slag according to claim 1 is processed granulation waterworks method of controlling security, and it is characterized in that: type of alarm concrete in described step 3) comprises:
3.1) be less than working barrel number of units preset value if be in the granulation pump quantity of non-malfunction, make the granulation pump of non-malfunction be working barrel,, without stand-by pump, send the working barrel number of units not and without the guard signal of stand-by pump;
3.2) equal working barrel number of units preset value if be in the pump number of units of non-malfunction, make the granulation pump of non-malfunction be working barrel,, without stand-by pump, send the enough but guard signal that can use without stand-by pump of working barrel number of units;
3.3) if the granulation pump number of units that is in non-malfunction greater than working barrel number of units preset value; and less than working barrel number of units preset value and stand-by pump number of units preset value sum; according to priority select working barrel from the granulation pump of non-malfunction; the granulation pump of all the other non-malfunctions is stand-by pump, sends working barrel quantity enough and stand-by pump is arranged but the inadequate guard signal of stand-by pump quantity.
4. blast furnace Ming Tefa slag according to claim 1 is processed granulation waterworks method of controlling security, and it is characterized in that: type of alarm concrete described step 4.1) comprises:
Be less than working barrel number of units preset value if a) be in the granulation pump number of units of non-malfunction, the guard signal of sending the working barrel number of units not and can using without stand-by pump; B) equal working barrel number of units preset value if be in the granulation pump number of units of non-malfunction, send the enough but guard signal that can use without stand-by pump of working barrel quantity; C) if the granulation pump number of units that is in non-malfunction, greater than working barrel number of units preset value, and less than working barrel number of units preset value and stand-by pump number of units preset value sum, is sent working barrel quantity enough and stand-by pump is arranged but the inadequate guard signal of stand-by pump quantity; D) state and have stand-by pump if working barrel breaks down in operational process, will start stand-by pump according to priority, and reason shut down in record.
5. blast furnace Ming Tefa slag according to claim 4 is processed granulation waterworks method of controlling security, it is characterized in that: when the warning of sending working barrel quantity not and can use without stand-by pump, if occur neither the also unfaulty conditions pump of non-stand-by pump of working barrel becomes working barrel with it and puts into operation; When sending the enough but warning that can use without stand-by pump of working barrel quantity, if occur neither the also unfaulty conditions pump of non-stand-by pump of working barrel becomes stand-by pump with it; Working barrel quantity is enough and stand-by pump is arranged but during the inadequate warning of stand-by pump quantity when sending, if occur neither working barrel also the unfaulty conditions pump of non-stand-by pump will become stand-by pump.
6. blast furnace Ming Tefa slag according to claim 1 is processed granulation waterworks method of controlling security, it is characterized in that: described step 4.2), the unlatching of control accident water pipe pneumavalve or the concrete mode of closing comprise:
E) when the working barrel outlet stool force value of real-time detection, outfall sewer force value within default parameter index scope and the working barrel number of units equal working barrel number of units preset value, make accident water pipe pneumavalve keep closing condition for accident water pipe pneumavalve transmitted signal; F) when sending guard signal, if working barrel outlet stool or outfall sewer force value lower than its default index and lasting Preset Time, or the working barrel number of units is less than working barrel number of units preset value, unlatching accident water pipe pneumavalve.
7. blast furnace Ming Tefa slag according to claim 1 is processed granulation waterworks method of controlling security, it is characterized in that: pump motor bearing temperature index comprises the high value of temperature, the high value of temperature; Suction well water level index comprises the high value of liquid level, liquid level low value; Pump discharge arm pressure index comprises a pipe pressure low value; Outfall sewer force value index comprises total pipe pressure low value.
8. according to claim 1 or 7 described blast furnace Ming Tefa slags are processed granulation waterworks method of controlling security, it is characterized in that: the time length that default each parameter exceeds default indication range is 5s.
9. blast furnace Ming Tefa slag according to claim 2 is processed granulation waterworks method of controlling security; it is characterized in that: when this end of tapping a blast furnace; described temperature accumulated value data keep, and want starting state control step while as next time, tapping a blast furnace and determine the foundation of working barrel and stand-by pump.
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| CN2012103486173A CN102864255B (en) | 2012-09-19 | 2012-09-19 | Safety control method for blast furnace minter process slag treatment granulation water supply system |
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| CN2012103486173A CN102864255B (en) | 2012-09-19 | 2012-09-19 | Safety control method for blast furnace minter process slag treatment granulation water supply system |
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| CN103834754B (en) * | 2014-01-13 | 2015-11-18 | 中冶南方工程技术有限公司 | Blast furnace Ming Tefa using exhaust heat of slag flushing water utilizes combined supply system |
| CN103866058B (en) * | 2014-01-13 | 2015-11-11 | 中冶南方工程技术有限公司 | Blast furnace rotary drum method using exhaust heat of slag flushing water utilizes combined supply system |
| CN104032054B (en) * | 2014-01-13 | 2015-12-30 | 中冶南方工程技术有限公司 | Blast furnace bottom filter method using exhaust heat of slag flushing water utilizes combined supply system |
| CN113686191B (en) * | 2021-07-27 | 2024-06-07 | 首钢京唐钢铁联合有限责任公司 | Automatic control method for heat exchange of blast furnace slag flushing water in steel plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986836A (en) * | 2006-12-28 | 2007-06-27 | 中冶南方工程技术有限公司 | Environment friendly blast furnace slag treating process and system |
| CN201817499U (en) * | 2010-07-27 | 2011-05-04 | 中冶南方工程技术有限公司 | Water processing system for blast-furnace slag granulation |
| CN202430237U (en) * | 2011-11-25 | 2012-09-12 | 河南科技大学 | Production equipment for steel slag balls and pond cooling system of production equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002226239A (en) * | 2001-01-30 | 2002-08-14 | Kawasaki Steel Corp | Method for producing hard granulated slag and apparatus therefor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986836A (en) * | 2006-12-28 | 2007-06-27 | 中冶南方工程技术有限公司 | Environment friendly blast furnace slag treating process and system |
| CN201817499U (en) * | 2010-07-27 | 2011-05-04 | 中冶南方工程技术有限公司 | Water processing system for blast-furnace slag granulation |
| CN202430237U (en) * | 2011-11-25 | 2012-09-12 | 河南科技大学 | Production equipment for steel slag balls and pond cooling system of production equipment |
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| Title |
|---|
| JP特开2002-226239A 2002.08.14 |
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