CN101935722B - 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
- Publication number
- CN101935722B CN101935722B CN2010102715852A CN201010271585A CN101935722B CN 101935722 B CN101935722 B CN 101935722B CN 2010102715852 A CN2010102715852 A CN 2010102715852A CN 201010271585 A CN201010271585 A CN 201010271585A CN 101935722 B CN101935722 B CN 101935722B
- Authority
- CN
- China
- Prior art keywords
- pass valve
- roof pressure
- blast furnace
- stator blade
- servo
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Blast Furnaces (AREA)
- Control Of Turbines (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
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 process is the pillar of steel and iron industry; The blast furnace gas energy recycle device be the great energy-conservation equipment of blast furnace process; Along with the fast development of industrial control technology, improving constantly for the security requirement of equipment, the blast furnace gas energy recycle device is as the auxiliary device of blast furnace simultaneously; It moves the not ordinary production of interfere blast furnace, also will utilize blast-furnace top gas recovery waste heat energy multiple to greatest extent.Being connected of traditional blast furnace gas energy recycle device and blast furnace process is as shown in Figure 1, and 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 pelletizing system 2 and reduction valve group 3 reduce pressure.After blast furnace gas energy recycle device input, reduction 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 control system 13; Wherein, The control system 13 of blast furnace gas energy recycle device is connected with high furnace control system 14, and the stator blade servo-drive system of coal gas turbine 65 constitutes stator blade blast furnace roof pressure regulating systems with stator blade roof pressure PID regulator 4, and first by-pass valve 9, second by-pass valve 10 are simultaneously parallelly connected 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 servo-drive system 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 servo-drive system 5; First by-pass valve 9 of blast furnace gas energy recycle device, second by-pass valve 10 only are when blast furnace gas energy recycle device emergency stop, just to participate in control; This control mode just often can satisfy the control requirement of blast furnace top pressure in the stator blade servo-drive system, but when the unusual quick complete shut-down of stator blade appears in stator blade servo-drive system 5, with the production safety that threatens blast furnace 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 to 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 regulator through the by-pass valve control system; Be provided with servo controller, position transducer receiver and servo-valve in the by-pass valve control system with door or door, comparer, first, second by-pass valve; By-pass valve roof pressure PID1 regulator is connected with comparer respectively, and comparer links to each other with servo-valve through the by-pass valve servo controller, and the position transducer receiver is connected between servo-valve and the comparer; Wherein, the measuring-signal of blast furnace roof pressure is that by-pass valve roof pressure PID1 regulator provides a roof pressure measured value PV1; The setting signal SV of blast furnace roof pressure handles through mathematical operation, for by-pass valve roof pressure PID1 regulator provides a roof pressure setting 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 regulator, 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 following:
By-pass valve roof pressure measured value: PV1=PV
By-pass valve roof pressure setting value: SV1=SV+k
Wherein: PV is a stator blade roof pressure measured value, i.e. the furnace roof actual pressure value of blast furnace;
SV is a stator blade roof pressure setting value, i.e. the furnace top pressure setting value of blast furnace;
K is the pressure constant, selects 5Kpa～10Kpa, perhaps confirms according to site specific;
2) control method of by-pass valve is following:
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 regulator; Lose when steering order 4～20mA electric signal appears in the stator blade servo-drive system, the control signal of promptly former stator blade roof pressure PID regulator is less than 4mA, and the hydraulic mechanism of the stator blade servo-drive system of rough gas turbine is closed; Cause blast furnace roof pressure fast rise, when blast furnace roof pressure PV-SV >=k, the by-pass valve control 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 setting value of participating in regulating is SV1=SV+k, simultaneously, and second by-pass valve open angle to 20%～40% (can adjust) according to field condition; 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 servo-drive system, if can recover normal in the short 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 servo-drive system of rough gas turbine.
The present invention is not constituting under the situation of any influence the control function of original by-pass valve; The roof pressure safety that has increased by-pass valve is regulated the interlocked control function; This method obtains 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 connection layout of blast furnace process;
Fig. 2 is a by-pass valve system chart of the present invention;
Fig. 3 is a by-pass valve steering logic block diagram;
Below in conjunction with accompanying drawing the present invention is made further detailed description.
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 is participated 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 regulator 11 through by-pass valve control system (12).
Be provided with servo controller (204), position transducer receiver 205 and servo-valve 206 in the by-pass valve control system 12 with (AND, 201) or door (OR, 202), comparer (203), first, second by-pass valve (9,10); By-pass valve roof pressure PID1 regulator 11 is connected with comparer 203, and comparer 203 links to each other with servo-valve 206 through by-pass valve servo controller 204, and position transducer receiver 205 is connected between servo-valve 206 and the comparer 203; Wherein, the measuring-signal of blast furnace roof pressure is that by-pass valve roof pressure PID1 regulator 11 provides a roof pressure measured value PV1; The setting signal SV of blast furnace roof pressure handles through mathematical operation, for by-pass valve roof pressure PID1 regulator 11 provides a roof pressure setting 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 regulator 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 measured value: PV1=PV
By-pass valve roof pressure setting value: SV1=SV+k
Wherein: PV is stator blade roof pressure measured value (the furnace roof actual pressure value of blast furnace); SV is stator blade roof pressure setting value (the furnace top pressure setting value of blast furnace), and k is the pressure constant, is generally 5～10KPa (specifically can confirm according to site specific).
The controlled step of by-pass valve is following:
In blast furnace gas energy recycle device normal course of operation, regulate the roof pressure of blast furnace by the stator blade servo-drive system regulator of rough gas turbine;
Lose when control command signal appears in former stator blade roof pressure PID regulator, (control signal of generally setting former stator blade roof pressure PID regulator is 4mA～20mA to the control signal of promptly former stator blade roof pressure PID regulator, and 4mA is corresponding to the hydraulic mechanism complete shut-down of stator blade servo-drive system 5 less than 4mA; 20mA is corresponding to the hydraulic actuating mechanism standard-sized sheet of stator blade servo-drive system 5); Make the hydraulic mechanism complete shut-down of the stator blade servo-drive system 5 of rough gas turbine 6, the blast furnace top pressure fast rise, (the k value is generally 5～10KPa when blast furnace top pressure measured value PV-SV >=k; Can confirm 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 setting value of participating 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, and by-pass valve roof pressure measured 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 regulator, 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 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 servo-drive system.
If coal gas turbine stator blade servo-drive system has occurred than catastrophic failure; Can not solve in the short time (being generally in 15 minutes); Because the by-pass valve group system is the ancillary method as stator blade roof pressure regulating system; Event can not replace stator blade servo-drive system control blast furnace roof pressure for a long time, thus to implement the emergency stop of blast furnace gas energy recycle device, so that the stator blade servo-drive system 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 servo-drive system,, obtained very desirable 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, second by-pass valve 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 regulator through by-pass valve control system (12);
Be provided with servo controller (204), position transducer receiver and servo-valve in the by-pass valve control system with (AND, 201) or door (OR, 202), comparer (203), first, second by-pass valve (9,10); By-pass valve roof pressure PID1 regulator is connected with comparer, and comparer links to each other with servo-valve through the by-pass valve servo controller, and the position transducer receiver is connected between servo-valve and the comparer; Wherein, the measuring-signal of blast furnace roof pressure is that by-pass valve roof pressure PID1 regulator provides a roof pressure measured value PV1; The setting signal SV of blast furnace roof pressure handles through mathematical operation, for by-pass valve roof pressure PID1 regulator provides a roof pressure setting value SV1; The effect of the servo controller of first, second by-pass valve (9,10) is an output order of carrying out by-pass valve roof pressure PID1 regulator, 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 following:
By-pass valve roof pressure measured value: PV1=PV
By-pass valve roof pressure setting value: SV1=SV+k
Wherein: PV is a stator blade roof pressure measured value, i.e. the furnace roof actual pressure value of blast furnace;
SV is a stator blade roof pressure setting value, i.e. the furnace top pressure setting value of blast furnace;
K is the pressure constant, selects 5 Kpa～10Kpa;
2) control method of by-pass valve is following:
In blast furnace gas energy recycle device normal course of operation, regulate the roof pressure of blast furnace by the stator blade servo-drive system of rough gas turbine;
Lose when steering order 4～20mA electric signal appears in former stator blade roof pressure PID regulator, the control signal of promptly former stator blade roof pressure PID regulator is less than 4mA, and the hydraulic actuating mechanism of the stator blade servo-drive system of rough gas turbine is by complete shut-down; Cause blast furnace roof pressure fast rise, when blast furnace roof pressure PV-SV >=k, by-pass valve control system (12) starts; Make the quick standard-sized sheet of first by-pass valve (9) and and then participate in the adjusting of blast furnace roof pressure; Its by-pass valve roof pressure setting value of participating in regulating is SV1=SV+k, simultaneously, and second by-pass valve (10) open angle to 20%～40%; Participate in the control of blast furnace roof pressure, it is basicly stable that furnace top pressure is returned to;
3) power supply and the wiring of inspection stator blade servo-drive system, if can recover normal in the short time, then first, second by-pass valve cuts out and withdraws from the control of blast furnace roof pressure gradually, the blast furnace roof pressure recovers control by the stator blade servo-drive system.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101935722A CN101935722A (en) | 2011-01-05 |
| CN101935722B true CN101935722B (en) | 2012-05-30 |
Family
ID=43389289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102715852A Active CN101935722B (en) | 2010-09-03 | 2010-09-03 | Control method of bypass valve of energy recovery device during abnormal full close of stator blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101935722B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425231A (en) * | 2019-08-28 | 2019-11-08 | 西安陕鼓动力股份有限公司 | The tripping control system and its control method of BPRT unit speed change clutch |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102268497B (en) * | 2011-07-12 | 2013-01-09 | 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 |
| 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 |
| CN103725813B (en) * | 2014-01-02 | 2015-05-20 | 莱芜钢铁集团有限公司 | TRT coordination control method and system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3516232B2 (en) * | 2000-06-19 | 2004-04-05 | 京清 韓 | Method and apparatus for implementing feedback control that optimally and automatically rejects disturbances |
| US6568416B2 (en) * | 2001-02-28 | 2003-05-27 | Brian L. Andersen | 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 |
| CN201321999Y (en) * | 2008-11-20 | 2009-10-07 | 西安陕鼓动力股份有限公司 | Adjustment control device of adjustable stator blade of axial flow compressor |
| CN201554505U (en) * | 2009-11-19 | 2010-08-18 | 西安陕鼓动力股份有限公司 | Starting control device for blast furnace pubic type residual pressure energy reclamation |
-
2010
- 2010-09-03 CN CN2010102715852A patent/CN101935722B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425231A (en) * | 2019-08-28 | 2019-11-08 | 西安陕鼓动力股份有限公司 | The tripping control system and its control method of BPRT unit speed change clutch |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101935722A (en) | 2011-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101935722B (en) | Control method of bypass valve of energy recovery device during abnormal full close of stator blade | |
| CN103509895B (en) | The method for controlling pressure of blast furnace top that a kind of TRT stator blade and reducer unit combine | |
| CN102268497B (en) | Safety control method for TRT (Blast Furnace Top Gas Recovery Turbine Unit) fixed blade servo control system | |
| CN103791485B (en) | Optimal control method of water supply system of thermal power generating unit | |
| CN102755997A (en) | Safe and energy-saving control device and control method of hot rolling high-pressure descaling system | |
| CN104773465B (en) | Large-scale transmission master-slave control equipment of belt conveyer and operation method thereof | |
| CN102699144A (en) | Method for straightening seriously warped steel plate | |
| CN101899539B (en) | Method for controlling overflow of blast furnace through by-pass valve of blast furnace gas energy recovery device | |
| CN102010921A (en) | Top pressure automatic control method for bell blast furnace top gas recovery turbine unit (TRT) | |
| CN101334672B (en) | Crystallizer on-line width modulation system | |
| CN104232846B (en) | A kind of system and method to RH refining furnace steam supply | |
| CN205348288U (en) | Control system is hauled oneself willingly into fully to water supply pump package | |
| CN111019692B (en) | Method for automatically controlling large valve switching of ethylene cracking furnace | |
| CN106403626B (en) | Sintering waste heat recycling and the full-automatic activation system of Sinter air machine Unit erriger and method | |
| CN101497171B (en) | Integrated control method for saw cutting load of hot sawing machine | |
| CN101871027B (en) | Blast furnace top pressure control method adopting gas dry method dust-removing device | |
| CN103337267A (en) | Method, device and system for controlling drain valve of heater of nuclear power station | |
| CN201554505U (en) | Starting control device for blast furnace pubic type residual pressure energy reclamation | |
| CN102602839A (en) | Control system, winding system and crane | |
| CN103135500A (en) | Machining controlling system of bending machine | |
| CN101768648A (en) | Blast furnace top pressure control system adopting gas dry-method dust-removal device | |
| CN105834232A (en) | High-pressure water descaling intelligent energy-saving system and control method thereof | |
| CN203658829U (en) | Mining machinery intelligent control device | |
| CN202860996U (en) | Rolling oil control system | |
| CN101581917A (en) | Integrated control method for large-span roof support dismantlement construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |