CN101935722A - Control method of bypass valve of energy recovery device during abnormal full close of stator blade - Google Patents
Control method of bypass valve of energy recovery device during abnormal full close of stator blade Download PDFInfo
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- CN101935722A CN101935722A CN2010102715852A CN201010271585A CN101935722A CN 101935722 A CN101935722 A CN 101935722A CN 2010102715852 A CN2010102715852 A CN 2010102715852A CN 201010271585 A CN201010271585 A CN 201010271585A CN 101935722 A CN101935722 A CN 101935722A
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- pass valve
- roof pressure
- blast furnace
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a control method of a bypass valve of an energy recovery device during the abnormal full close of a stator blade. In the method, the bypass valve is additionally provided with safe top-pressure adjustment and interlock control functions under the condition that the traditional interlock shutdown control function of the bypass valve of the energy recovery device is unaffected. During the normal operation of the energy recovery device of blast furnace gas, when the turbine stator blade is abruptly and rapidly closed for a certain reason (for example: a stator blade servo controller is power off, a stator blade control instruction signal loses, and the like) to cause the furnace top pressure of a blast furnace to abruptly rise, the bypass valve is rapidly and fully opened to adjust the furnace top pressure of the blast furnace at the moment, a stator blade servo system can be detected in the case of operation to confirm a failure reason and a finally adopted measure so as to ensure the safety of the blast furnace, the conversion in the process is stable, and the energy recovery device of the blast furnace gas can avoid unnecessary frequent shutdown. Proved by site operation at present, the method has favorable effect and greatly ensures the production safety of the blast furnace.
Description
Technical field
The invention belongs to blast-furnace top gas recovery waste heat energy recycle device field, relate to a kind of control method, the control method of especially a kind of energy recycle device by-pass valve when the unusual complete shut-down of stator blade.
Background technology
Blast-furnace smelting is the pillar of Iron And Steel Industry, the blast furnace gas energy recycle device be the great energy-conservation equipment of blast-furnace smelting, fast development along with industrial control technology, security requirement for equipment is improving constantly, the blast furnace gas energy recycle device is as the auxiliary facility of blast furnace simultaneously, its operation can not be disturbed the ordinary production of blast furnace, also will utilize blast-furnace top gas recovery waste heat energy multiple to greatest extent.Being connected as shown in Figure 1 of traditional blast furnace gas energy recycle device and blast-furnace smelting, before the blast furnace gas energy recycle device did not drop into, the coal gas that blast furnace 1 produces removed processing pipe network after dust-removal system 2 and 3 decompressions of reducing valve group.After blast furnace gas energy recycle device input, reducing valve group 3 is closed, and the coal gas that blast furnace 1 produces is sent into coal gas turbine 6 and driven generator 7 generatings.The blast furnace gas energy recycle device has Controlling System 13, wherein, the Controlling System 13 of blast furnace gas energy recycle device is connected with high furnace control system 14, the stator blade servosystem 5 of coal gas turbine 6 and stator blade roof pressure PID setter 4 constitute stator blade blast furnace roof pressure regulation system, first by-pass valve 9, second by-pass valve 10 are simultaneously in parallel with coal gas turbine 6, repid cut-off valve 8 is arranged on coal gas turbine 6 inlets, and coal gas turbine 6 is connected with generator 7.The blast furnace gas energy recycle device is at normal operation period; the furnace top pressure of blast furnace 1 is by stator blade servosystem 5 controls of coal gas turbine; this control mode just often can satisfy the control requirement of the furnace top pressure of blast furnace 1 in stator blade servosystem 5; first by-pass valve 9 of blast furnace gas energy recycle device; second by-pass valve 10 only is just to participate in control when blast furnace gas energy recycle device emergency stop; this control mode just often can satisfy the control requirement of blast furnace top pressure in the stator blade servosystem; but when the unusual quick complete shut-down of stator blade appears in stator blade servosystem 5, the production safety of blast furnace will be threatened greatly.How to accomplish the blast furnace gas energy recycle device when stator blade thrashing, guarantee that the safety of blast furnace then is to need problem demanding prompt solution.
Summary of the invention
Defective or deficiency at above-mentioned prior art existence, the objective of the invention is to, the control method of a kind of energy recycle device by-pass valve when the unusual complete shut-down of turbine stator blade is provided, and this method can effectively be avoided the blast furnace gas energy recycle device, and (be called for short: what the blast furnace roof pressure) produced has a strong impact on to the furnace top pressure of blast furnace when the unusual complete shut-down of turbine stator blade.
For realizing above-mentioned task, the present invention takes following technical solution:
The control method of a kind of energy recycle device by-pass valve when the unusual complete shut-down of stator blade is characterized in that, comprises the steps:
1) on first by-pass valve of blast furnace gas energy recycle device, second by-pass valve, position transducer is set, and two by-pass valve are connected to by-pass valve roof pressure PID1 setter by the by-pass valve Controlling System;
Be provided with servo controller, position transducer receptor and servo-valve in the by-pass valve Controlling System with door or door, comparer, first, second by-pass valve; By-pass valve roof pressure PID1 setter is connected with comparer respectively, and comparer links to each other with servo-valve by the by-pass valve servo controller, and the position transducer receptor is connected between servo-valve and the comparer; Wherein, the measurement signal of blast furnace roof pressure provides a roof pressure observed value PV1 for by-pass valve roof pressure PID1 setter; The setting signal SV of blast furnace roof pressure handles through mathematical operation, for by-pass valve roof pressure PID1 setter provides a roof pressure set(ting)value SV1; The effect of the servo controller of first, second by-pass valve is an output order of carrying out by-pass valve roof pressure PID1 setter, controls the aperture of first, second by-pass valve;
The relation of by-pass valve roof pressure controlled variable and stator blade roof pressure controlled variable is as follows:
By-pass valve roof pressure observed value: PV1=PV
By-pass valve roof pressure set(ting)value: SV1=SV+k
Wherein: PV is a stator blade roof pressure observed value, i.e. the furnace roof actual pressure value of blast furnace;
SV is a stator blade roof pressure set(ting)value, i.e. the furnace top pressure set(ting)value of blast furnace;
K is the pressure constant, selects 5Kpa～10Kpa, perhaps determines according to site specific;
2) control method of by-pass valve is as follows:
In blast furnace gas energy recycle device normal course of operation, regulate the roof pressure of blast furnace by former stator blade roof pressure PID setter;
When appearring in the stator blade servosystem, loses steering order 4～20mA electrical signal, the control signal that is former stator blade roof pressure PID setter is less than 4mA, the hydraulic gear of the stator blade servosystem of crude gas turbine is closed, cause blast furnace roof pressure fast rise, when blast furnace roof pressure PV-SV 〉=k, the by-pass valve Controlling System starts, make the quick standard-sized sheet of first by-pass valve and then participate in the adjusting of blast furnace roof pressure, its by-pass valve roof pressure set(ting)value that participates in regulating is SV1=SV+k, simultaneously, second by-pass valve open angle to 20%～40%(can be according to the field condition adjustment), participate in the control of blast furnace roof pressure, it is basicly stable that furnace top pressure is returned to;
Next check the power supply and the wiring of stator blade servosystem, if can recover normal in the short period of time, then first, second by-pass valve cuts out and withdraws from the control of blast furnace roof pressure gradually, and the blast furnace roof pressure recovers control by the stator blade servosystem of crude gas turbine.
The present invention constitutes under the situation of any influence in the controlled function to original by-pass valve not, the roof pressure safety that has increased by-pass valve is regulated the interlocked control function, this method has obtained application progressively in the control of blast furnace gas energy recycle device by-pass valve, according to the on-site verification of putting into operation unit, the control method effect of this blast furnace gas energy recycle device by-pass valve when the unusual complete shut-down of stator blade is fine at present.
Description of drawings
Fig. 1 is the traditional blast furnace gas energy recycle device and the interface chart of blast-furnace smelting;
Fig. 2 is a by-pass valve system chart of the present invention;
Fig. 3 is a by-pass valve steering logic block diagram;
The present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment
The present invention at first passes through coal gas turbine stator blade Study of Servo Control System, and the research of blast furnace system characteristics, analyzes the reason that causes the unusual complete shut-down of turbine stator blade, proposes by-pass valve participates in roof pressure control when the unusual complete shut-down of turbine stator blade method.
With reference to Fig. 2, the control method of blast furnace gas energy recycle device by-pass valve when the unusual complete shut-down of stator blade comprises the steps:
1) first by-pass valve 9, second by-pass valve 10 at the blast furnace gas energy recycle device is provided with position transducer (ZT), and two by-pass valve (9,10) are connected by-pass valve roof pressure PID1 setter 11 by by-pass valve Controlling System (12).
Be provided with servo controller (204), position transducer receptor 205 and servo-valve 206 in the by-pass valve Controlling System 12 with (AND, 201) or door (OR, 202), comparer (203), first, second by-pass valve (9,10); By-pass valve roof pressure PID1 setter 11 is connected with comparer 203, and comparer 203 links to each other with servo-valve 206 by by-pass valve servo controller 204, and position transducer receptor 205 is connected between servo-valve 206 and the comparer 203; Wherein, the measurement signal of blast furnace roof pressure provides a roof pressure observed value PV1 for by-pass valve roof pressure PID1 setter 11; The setting signal SV of blast furnace roof pressure handles through mathematical operation, for by-pass valve roof pressure PID1 setter 11 provides a roof pressure set(ting)value SV1; The effect of the servo controller 204 of first, second by-pass valve (9,10) is an output order of carrying out by-pass valve roof pressure PID1 setter 11, controls the aperture of first, second by-pass valve (9,10).
The relation of by-pass valve roof pressure controlled variable and stator blade roof pressure controlled variable:
By-pass valve roof pressure observed value: PV1=PV
By-pass valve roof pressure set(ting)value: SV1=SV+k
Wherein: PV is stator blade roof pressure observed value (the furnace roof actual pressure value of blast furnace); SV is stator blade roof pressure set(ting)value (the furnace top pressure set(ting)value of blast furnace), and k is the pressure constant, is generally 5～10KPa(and specifically can determines according to site specific).
The controlled step of by-pass valve is as follows:
In blast furnace gas energy recycle device normal course of operation, regulate the roof pressure of blast furnace by the stator blade servosystem setter of crude gas turbine;
When the steering order Loss Of Signal appears in former stator blade roof pressure PID setter, the control signal that is former stator blade roof pressure PID setter is 4mA～20mA less than the general control signal of setting former stator blade roof pressure PID setter of 4mA(, 4mA is corresponding to the hydraulic gear complete shut-down of stator blade servosystem 5,20mA is corresponding to the hydraulic actuator standard-sized sheet of stator blade servosystem 5), make the hydraulic gear complete shut-down of the stator blade servosystem 5 of crude gas turbine 6, the blast furnace top pressure fast rise, (the k value is generally 5～10KPa when blast furnace top pressure observed value PV-SV 〉=k, can determine concrete numerical value according to field condition), start hydraulic pressure by-pass valve system fast, make first by-pass valve, 9 quick standard-sized sheets participate in the adjusting of blast furnace roof pressure, its by-pass valve roof pressure set(ting)value that participates in regulating is SV1=SV+k, simultaneously, second by-pass valve, 10 angles open to 20%～40%, participate in the control of blast furnace roof pressure together, by-pass valve roof pressure observed value PV1 is consistent with the furnace roof actual pressure measurements PV of blast furnace, SV1 and PV1 are as two inputs of by-pass valve roof pressure PID1 setter, finally by by-pass valve control blast furnace roof pressure.Can check the wiring and the power supply of stator blade servo-control system this moment, can not recover normal if do not influence in the short period of time under the situation of other system of unit operation, and then by-pass valve withdraws from the control of blast furnace roof pressure, and the blast furnace roof pressure recovers control by coal gas turbine stator blade servosystem.
If coal gas turbine stator blade servosystem has occurred than catastrophe failure; can not solve in the short period of time (being generally in 15 minutes); because the by-pass valve group system is the assist measure as stator blade roof pressure regulation system; event can not replace stator blade servosystem control blast furnace roof pressure for a long time; so implement the emergency stop of blast furnace gas energy recycle device, so that the stator blade servosystem is done comprehensive maintenance.
The control method of energy recycle device by-pass valve of the present invention when the unusual complete shut-down of stator blade is advanced reliable, reached the advanced level of industry, avoided the considerable influence of the inefficacy of turbine stator blade servosystem,, obtained very ideal effect through a plurality of on-site verifications for blast furnace production.
Claims (2)
1. the control method of an energy recycle device by-pass valve when the unusual complete shut-down of stator blade is characterized in that, comprises the steps:
1) first by-pass valve 9, second by-pass valve 10 at the blast furnace gas energy recycle device is provided with position transducer (ZT), and two by-pass valve (9,10) are connected by-pass valve roof pressure PID1 setter 11 by by-pass valve Controlling System (12).
Be provided with servo controller (204), position transducer receptor 205 and servo-valve 206 in the by-pass valve Controlling System 12 with (AND, 201) or door (OR, 202), comparer (203), first, second by-pass valve (9,10); By-pass valve roof pressure PID1 setter 11 is connected with comparer 203, and comparer 203 links to each other with servo-valve 206 by by-pass valve servo controller 204, and position transducer receptor 205 is connected between servo-valve 206 and the comparer 203; Wherein, the measurement signal of blast furnace roof pressure provides a roof pressure observed value PV1 for by-pass valve roof pressure PID1 setter 11; The setting signal SV of blast furnace roof pressure handles through mathematical operation, for by-pass valve roof pressure PID1 setter 11 provides a roof pressure set(ting)value SV1; The effect of the servo controller 204 of first, second by-pass valve (9,10) is an output order of carrying out by-pass valve roof pressure PID1 setter 11, controls the aperture of first, second by-pass valve (9,10).
The relation of by-pass valve roof pressure controlled variable and stator blade roof pressure controlled variable is as follows:
By-pass valve roof pressure observed value: PV1=PV
By-pass valve roof pressure set(ting)value: SV1=SV+k
Wherein: PV is a stator blade roof pressure observed value, i.e. the furnace roof actual pressure value of blast furnace;
SV is a stator blade roof pressure set(ting)value, i.e. the furnace top pressure set(ting)value of blast furnace;
K is the pressure constant, selects 5 Kpa～10Kpa, perhaps determines according to site specific;
2) control method of by-pass valve is as follows:
In blast furnace gas energy recycle device normal course of operation, regulate the roof pressure of blast furnace by the stator blade servosystem of crude gas turbine;
When appearring in former stator blade roof pressure PID setter, loses steering order 4～20mA electrical signal, the control signal that is former stator blade roof pressure PID setter is less than 4mA, the hydraulic actuator of the stator blade servosystem 5 of crude gas turbine 6 is by complete shut-down, cause blast furnace roof pressure fast rise, when blast furnace roof pressure PV-SV 〉=k, by-pass valve Controlling System (12) starts, make the quick standard-sized sheet of first by-pass valve (9) also and then participate in the adjusting of blast furnace roof pressure, its by-pass valve roof pressure set(ting)value that participates in regulating is SV1=SV+k, simultaneously, second by-pass valve (10) open angle to 20%～40%(can be according to the field condition adjustment), participate in the control of blast furnace roof pressure, it is basicly stable that furnace top pressure is returned to.
3) check the power supply and the wiring of stator blade servosystem, if can recover normal in the short period of time, then first, second by-pass valve cuts out and withdraws from the control of blast furnace roof pressure gradually, and the blast furnace roof pressure recovers control by the stator blade servosystem.
2. the method for claim 1 is characterized in that, described first, second by-pass valve (9,10) is an equal diameter hydraulic pressure by-pass valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102715852A CN101935722B (en) | 2010-09-03 | 2010-09-03 | Control method of bypass valve of energy recovery device during abnormal full close of stator blade |
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| CN2010102715852A CN101935722B (en) | 2010-09-03 | 2010-09-03 | Control method of bypass valve of energy recovery device during abnormal full close of stator blade |
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| CN101935722B CN101935722B (en) | 2012-05-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102268497A (en) * | 2011-07-12 | 2011-12-07 | 西安陕鼓动力股份有限公司 | Safety control method for TRT (Blast Furnace Top Gas Recovery Turbine Unit) fixed blade servo control system |
| CN102536350A (en) * | 2011-12-31 | 2012-07-04 | 西安陕鼓动力股份有限公司 | Safety control method at urgent fault time of power supply of TRT (Top gas pressure Recovery Turbine) set automatic control system |
| CN103725813A (en) * | 2014-01-02 | 2014-04-16 | 莱芜钢铁集团有限公司 | TRT coordination control method and system |
Families Citing this family (1)
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| CN110425231B (en) * | 2019-08-28 | 2021-03-09 | 西安陕鼓动力股份有限公司 | Trip control system and method for BPRT set speed change clutch |
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2010
- 2010-09-03 CN CN2010102715852A patent/CN101935722B/en active Active
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| US20020117214A1 (en) * | 2001-02-28 | 2002-08-29 | Tucker Jeffrey C. | Fluid flow control system, fluid delivery and control system for a fluid delivery line, and method for controlling pressure oscillations within fluid of a fluid delivery line |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102268497A (en) * | 2011-07-12 | 2011-12-07 | 西安陕鼓动力股份有限公司 | Safety control method for TRT (Blast Furnace Top Gas Recovery Turbine Unit) fixed blade servo control system |
| CN102536350A (en) * | 2011-12-31 | 2012-07-04 | 西安陕鼓动力股份有限公司 | Safety control method at urgent fault time of power supply of TRT (Top gas pressure Recovery Turbine) set automatic control system |
| CN102536350B (en) * | 2011-12-31 | 2014-07-02 | 西安陕鼓动力股份有限公司 | Safety control method at urgent fault time of power supply of TRT (Top gas pressure Recovery Turbine) set automatic control system |
| CN103725813A (en) * | 2014-01-02 | 2014-04-16 | 莱芜钢铁集团有限公司 | TRT coordination control method and system |
| CN103725813B (en) * | 2014-01-02 | 2015-05-20 | 莱芜钢铁集团有限公司 | TRT coordination control method and system |
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| CN101935722B (en) | 2012-05-30 |
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