CN202744581U - Gas recovery control system of converter - Google Patents
Gas recovery control system of converter Download PDFInfo
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- CN202744581U CN202744581U CN2012203901913U CN201220390191U CN202744581U CN 202744581 U CN202744581 U CN 202744581U CN 2012203901913 U CN2012203901913 U CN 2012203901913U CN 201220390191 U CN201220390191 U CN 201220390191U CN 202744581 U CN202744581 U CN 202744581U
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Abstract
The utility model provides a gas recovery control system of a converter, and the system comprises a three-way valve, a single-coil three-way electromagnetic valve, a first programmable logic controller (PLC), an electromagnetic valve explosion-proof control box and a second PLC, wherein the three-way valve is controlled by the single-coil three-way electromagnetic valve to recover gas under the state that a coil is powered on, and the three-way valve is controlled by the single-coil three-way electromagnetic valve to release the gas under the state that the coil is powered off; and a control signal is sent to the single-coil three-way electromagnetic valve so as to control the operation of the three-way valve. According to the gas recovery control system of the converter, the model and the control method of the gas recovery three-way electromagnetic valve of the converter are changed, so that the danger that the gas of a gas tank flows back when the PLC is crashed or the system is powered off is effectively prevented, and the safety and effect of gas recovery are ensured; a difficult problem of preventing the backflow of the gas during the gas recovery of the converter is solved, and great progress is made in design; and the safety, the reliability and the stability in the gas recovery of the converter are improved, the transformation fee is low, the economic benefits are significant, and the safety benefits are great.
Description
Technical field
The utility model is usually directed to Fuzzy control system for coal gas recollection, relates in particular to the coal-gas recovering Controlling System of climbing steel vanadium extraction steelworks 1#, 2#, 3# converter.
Background technology
1#, 2#, 3# Fuzzy control system for coal gas recollection built up and come into operation in January, 2010, converter gas recovery system is the major equipment in the converter steelmaking process, it is the important step in the RECOVERY OF CONVERTER GAS process, the principle of its coal-gas recovering is to detect gas content and the oxygen content (O2≤1%, CO 〉=25%) of fan outlet furnace gas by the laser detection instrument.Converter will produce a large amount of flue gas (containing coal gas) in the converting process of STEELMAKING PRODUCTION, effect by the blower fan exhausting enters pipeline with flue gas from petticoat pipe, enter again clean carburetion system (effects such as cooling, washing), then enter the fans entrance pipeline, enter again the fan outlet pipeline.
Fig. 1 is the control flow schematic diagram that existing Fuzzy control system for coal gas recollection is shown.As shown in Figure 1, when satisfying the coal-gas recovering condition, operator send instruction by operation screen, receive operational order by PLC, instruction signal is sent to the relay housing of electric panel room, the relay housing sends to instruction signal on-the-spot special-purpose magnetic valve explosion-proof control box again, is controlled the action of magnetic valve by the on-off control system of controlling box inside.
Fig. 2 is the schematic block diagram that illustrates according to RECOVERY OF CONVERTER GAS, diffuse channel.Being described as follows of the element that reference number among Fig. 2 is indicated:
201---converter
202---petticoat pipe
203---clean carburetion system
204---blower fan
205---by-pass valve
206---T-valve diffuses side
207---T-valve reclaims side
208---water seal inverted valve
209---U-shaped water seal
210---the double disc water-sealed valve
211---gas chamber
212---diffusing tower
As shown in Figure 2, after the magnetic valve action, with water seal inverted valve open, T-valve reclaims that side is opened, T-valve diffuses side closure, by-pass valve cuts out (by-pass valve in the situation that accident just open), coal gas of converter enters in the gas chamber of 8 ten thousand steres of climbing the active center of steel after reclaiming side, water seal inverted valve, U-shaped water seal (not water filling during non-maintenance), double disc water-sealed valve (non-maintenance is opened often) and coal gas main pipe line by T-valve; Otherwise water seal inverted valve is closed, T-valve diffuses that side is opened, T-valve reclaims side closure, and coal gas of converter then enters 60 meters diffusing towers burnings of climbing steel vanadium extraction steelworks.
Fig. 3 is the principle schematic that existing Fuzzy control system for coal gas recollection is shown.Being described as follows of the element that reference number among Fig. 3 is indicated:
1---gate valve (source of the gas main valve)
2---stopping valve
3---manual ball valve
4.1---manual ball valve
4.2---manual ball valve
4.3---manual ball valve
5---air filter
6---reducing valve
7---oil sprayer
8---manual ball valve
9---one-way throttle valve
10---twin coil water seal check fast electromagnetic valve (3 position-5 way)
11---metallic hose
12---water seal inverted valve
13---twin coil water seal check is magnetic valve (two-position five-way) at a slow speed
14.1---unicoil water seal water replenishing magnetic valve (two-position five-way)
14.2---unicoil diffuses scouring electromagnetic valve (two-position five-way)
14.3---unicoil reclaims scouring electromagnetic valve (two-position five-way)
14.4---unicoil bypass scouring electromagnetic valve (two-position five-way)
15---the water seal water replenishing valve
16.1---twin coil three-way solenoid valve (two-position five-way)
16.2---twin coil bypass solenoid valve (two-position five-way)
17---by-pass valve
18---T-valve
19---pressure unit
20.1---diffuse flush valve
20.2---reclaim flush valve
20.3---the bypass flush valve
As shown in Figure 3, total source of the gas is fed into the coal-gas recovering Controlling System of 1# converter, 2# converter and 3# converter according to source of the gas main valve 1, exemplarily shows the coal-gas recovering Controlling System of 1# converter in Fig. 3.
With reference to Fig. 3, source of the gas (nitrogen) passes through gate valve (source of the gas main valve) 1 through a plurality of arms, thereby is provided to respectively 1# Fuzzy control system for coal gas recollection and 2#, 3# Fuzzy control system for coal gas recollection gas.Take the 1# converter as example, nitrogen arrives stopping valve 2 by gate valve (source of the gas main valve) 1, arrive again manual ball valve 4.1, again by the impurity in air filter 5 filtering gas, again by reducing valve 6 decompressions, again by oil sprayer 7 (oil spray in the pipeline provides lubricated to valve core of the electromagnetic valve), to three arms.An arm divides again after by manual ball valve 4.2 and is clipped to the two-way arm, leads up to the 14.4 control bypass flush valves 20.3 of unicoil bypass scouring electromagnetic valve; Another road is by twin coil bypass solenoid valve 16.2 controlling elementss 17.An arm divides again after by element 4.3 and is clipped to three road arms, leads up to element 16.1 control by-pass valve 18; Another road is diffused scouring electromagnetic valve 14.2 controls by unicoil and is diffused flush valve 20.1; The unicoil of leading up to again reclaims scouring electromagnetic valve 14.3 controls and reclaims flush valve 20.2.An arm divides again after by manual ball valve 8 and is clipped to the two-way arm, leads up to unicoil water seal water replenishing magnetic valve 14.1 control water seal water replenishing valves 15; At a slow speed magnetic valve 13 control water seal inverted valves 12 of twin coil water seal check fast electromagnetic valve 10 and twin coil water seal check are passed through again by behind one-way throttle valve 9 adjusting gas flows in another road.In addition, gas can pass through manual ball valve 3, can come the pressure of gas in the detector tube road with pressure unit 19.
For brevity, the below only illustrates the concrete operations of existing Fuzzy control system for coal gas recollection for T-valve 18.
Often open when manual ball valve 4.3 is flat always, and in handling failure or carry out equipment inspection and be used for cutting off source of the gas.Twin coil three-way solenoid valve 16.1 comprises that electro-magnet spool, recovery coil and one diffuse coil.T-valve 18 comprises twin cylinder, and for example, one is reclaimed cylinder and one and diffuses cylinder.
Control source of the gas (nitrogen) enters twin coil three-way solenoid valve 16.1 by manual ball valve 4.3.When coal-gas recovering, the recovery coil of twin coil three-way solenoid valve 16.1 gets electric, carries out the gas commutation by its electro-magnet spool, and the control source of the gas is opened.At this moment, nitrogen reclaims cylinder and begins action to the recovery cylinder air feed of T-valve 18.Detect to reclaim after the cylinder action puts in place by the limit, at this moment, be in the coal-gas recovering state.When coal gas diffusion, the coil that diffuses of twin coil three-way solenoid valve 16.1 gets electricly, carries out the gas commutation by its electro-magnet spool, and the control source of the gas is opened, and at this moment, nitrogen diffuses the cylinder air feed to T-valve 18, diffuses cylinder and begins action.Detect by the limit and to diffuse after the cylinder action puts in place, at this moment, be in the coal gas diffusion state.When coal gas of converter reclaimed, the recovery coil of twin coil three-way solenoid valve 16.1 was in to get electricity condition, diffused coil and was in power failure state.If the fault of programmable logic controller (PLC) deadlock of appearance this moment such as converter system power down or control gas recovery system etc., therefore the recovery coil of twin coil three-way solenoid valve 16.1 can power down also be in power failure state so, the converter primary air fan also can power down and therefore stall, and the coil that diffuses of twin coil three-way solenoid valve 16.1 is in power failure state.Because the drawback of twin coil three-way solenoid valve 16.1 is the gas but carry out the gas commutation by its electro-magnet spool of can not automaticallying switch, so at this moment, T-valve 18 will rest on the coal-gas recovering position, and on-the-spot double disc water-sealed valve, water seal inverted valve all be in the recovery state, makes gas line form a path.If untimely such as the fault handling that the PLC of converter system power down or control gas recovery system crashes etc., perhaps operator to close the double disc water-sealed valve to on-site manual untimely, then the pressure of gas chamber will be higher than the pressure of converter primary air fan outlet side, thus the danger that can cause the coal gas of the gas chamber of 8 ten thousand steres to pour in down a chimney returning.
Along with climbing improving constantly of steel production capacity, the efficient of 1#, 2#, 3# RECOVERY OF CONVERTER GAS is more and more higher, and is also more and more higher to the safety requirements of converter gas recovery system.Owing to having defective in the design, if 1#, 2#, when the 3# coal gas of converter is reclaiming, if the PLC of converter system power down this moment or control gas recovery system crashes, double disc water-sealed valve, water seal inverted valve, T-valve all are in the recovery state so, primary air fan power down stall, the pressure of gas chamber will be higher than the pressure of fan outlet side, thereby the coal gas that the gas chamber of 8 ten thousand steres can occur pours in down a chimney the danger of returning.Not only affect the efficient of 1#, 2#, 3# RECOVERY OF CONVERTER GAS, but also the serious accident of carbon monoxide poisoning or blast can occur.
Defective and problem that existing 1#, 2#, 3# converter gas recovery system exist are as follows:
1, because the control magnetic valve of T-valve adopts is the Double coil electromagnetic valve of K25D2-40A model, under PLC deadlock or system power failure state, can't carry out gas circuit and switch, T-valve 18 will keep original state, if diffuse state, coal gas will burn by diffusing tower; If the recovery state, double disc water-sealed valve, water seal inverted valve, T-valve all are in the recovery state, primary air fan power down stall, and the coal gas of gas chamber will pour in down a chimney.
2, the scene has a cover to prevent the interim measure that coal gas pours in down a chimney, cover ups power and a warning device, but, when reporting to the police, operator need to confirm the state produced and the verity of warning, scram button on the device again pushes for emergency, ups power is powered to the twin coil three-way solenoid valve, for the sake of security, also need operator to close the double disc water-sealed valve to on-site manual, these all need the regular hour, if operator do not hear warning or untimely to execute-in-place, then have little time to control coal gas and pour in down a chimney.
3, because the Controlling System of on-the-spot Double coil electromagnetic valve is the explosion-proof control box of the special special use of manufacturer controls, it is to detect by the limit magnetic valve is positioned, and carry out interlocked control by the time relay in conjunction with the safety condition of coal-gas recovering, its control accuracy and safety interlocking conditional request are very high, so can not arbitrarily change the Controlling System of explosion-proof control box inside, bring very large difficulty to technological transformation.
The utility model content
The purpose of exemplary embodiment of the present utility model is to overcome above and other shortcoming in the prior art.For this reason, exemplary embodiment of the present utility model provides a kind of Fuzzy control system for coal gas recollection.This system can prevent the danger that coal gas of converter pours in down a chimney effectively, and security, reliability, the stability that improves RECOVERY OF CONVERTER GAS is significant.
The one side of exemplary embodiment of the present utility model has been to change model specification and the control mode thereof of RECOVERY OF CONVERTER GAS three-way solenoid valve, under the state that PLC deadlock or system power failure occur, the danger of effectively having avoided the coal gas of gas chamber to pour in down a chimney returning, thus safety and the effect of coal-gas recovering guaranteed.
Exemplary embodiment of the present utility model be that on the other hand having solved RECOVERY OF CONVERTER GAS prevents the difficult problem that coal gas pours in down a chimney, and has great progress in design.
The another aspect of exemplary embodiment of the present utility model is greatly to have improved security, reliability, the stability of RECOVERY OF CONVERTER GAS, and improvement expenses low (approximately about 50,000 yuan), remarkable in economical benefits, and safety benefit is great.
According to exemplary embodiment of the present utility model, a kind of Fuzzy control system for coal gas recollection is provided, described Fuzzy control system for coal gas recollection comprises: T-valve, T-valve comprises gas entry, coal-gas recovering mouth and coal gas diffusion mouth, gas entry receives the gas that reclaims from converter, the coal-gas recovering mouth is connected to the RECOVERY OF CONVERTER GAS cabinet, and the coal gas diffusion mouth is connected to the coal gas of converter diffusing tower; The unicoil three-way solenoid valve, the unicoil three-way solenoid valve comprises single coil and electro-magnet spool, the unicoil three-way solenoid valve gets control T-valve connection gas entry and coal-gas recovering mouth under the electricity condition at coil, to carry out coal-gas recovering, the unicoil three-way solenoid valve is controlled T-valve and is communicated with gas entry and coal gas diffusion mouth under the coil power failure state, to carry out coal gas diffusion; The first programmable logic controller, the signal that the first programmable logic controller basis is inputted from the outside produces the control signal be used to the operation of controlling described Fuzzy control system for coal gas recollection; The second programmable logic controller, the second programmable logic controller receive to be used for controlling the control signal of the operation of described Fuzzy control system for coal gas recollection through the magnetic valve explosion-proof control box from the first programmable logic controller, with the control signal of generation for the operation of control unicoil three-way solenoid valve, thereby the unicoil three-way solenoid valve is controlled the operation of T-valve according to the control signal for the operation of controlling the unicoil three-way solenoid valve that receives from the second programmable logic controller.
T-valve can comprise the recovery cylinder and diffuse cylinder.When carrying out coal-gas recovering, the coil of unicoil three-way solenoid valve gets electric, and carries out the gas commutation by the electro-magnet spool, thereby the control source of the gas is opened and to the recovery cylinder air feed of T-valve, begin action and reach the coal-gas recovering state so that reclaim cylinder.When carrying out coal gas diffusion, the coil losing electricity of unicoil three-way solenoid valve and electro-magnet spool are closed, carry out the gas commutation by the gas of the control source of the gas supply draught head by the unicoil three-way solenoid valve in the recovery cylinder of T-valve, thereby the control source of the gas is opened and to T-valve diffuse the cylinder air feed begin action and reach the coal gas diffusion state so that diffuse cylinder.
The unicoil three-way solenoid valve can also comprise venting hole.After coal gas diffusion was complete, the venting hole by the unicoil three-way solenoid valve diffused the gas by the supply of control source of the gas in the cylinder.
The control signal that the first programmable logic controller produces is used for controlling the operation of described Fuzzy control system for coal gas recollection can comprise the control signal of the operation that is respectively applied to control each magnetic valve in the described Fuzzy control system for coal gas recollection.
Described Fuzzy control system for coal gas recollection can also comprise: the first rly., the first rly. is connected between the first programmable logic controller and the magnetic valve explosion-proof control box, so that the signal that provides from the first programmable logic controller is changed, and the signal after will changing is provided to the magnetic valve explosion-proof control box; The second rly., the second rly. are connected between magnetic valve explosion-proof control box and the second programmable logic controller, and so that the signal that provides from the magnetic valve explosion-proof control box is changed, and the signal after will changing is provided to the second programmable logic controller; The 3rd rly., the 3rd rly. are connected between the second programmable logic controller and the unicoil three-way solenoid valve, and with to changing from the signal of the second programmable logic controller, and the signal after will changing is provided to the unicoil three-way solenoid valve.
Whole coal gas diffusion process according to the Fuzzy control system for coal gas recollection of exemplary embodiment of the present utility model is a full-automatic process, so, in preventing of providing of the exemplary embodiment of the present utility model system that coal gas pours in down a chimney, the unicoil three-way solenoid valve gets electric opening (recovery), dead electricity is closed (diffusing), therefore occur crashing such as PLC or the state of the fault of system power failure etc. under, the unicoil three-way solenoid valve is in power failure state, can not keep the recovery state, coal gas can be in the state of diffusing.
The Fuzzy control system for coal gas recollection that the utility model provides can prevent that coal gas from pouring in down a chimney.Specifically, in the Fuzzy control system for coal gas recollection according to exemplary embodiment of the present utility model, the unicoil three-way solenoid valve be electric opening (recovery), dead electricity are closed (diffusing), therefore occur crashing such as PLC or the state of the fault of system power failure etc. under, the unicoil three-way solenoid valve is in power failure state, can not keep the recovery state, coal gas can be in the state of diffusing.Under these circumstances, T-valve diffuses side and opens, and T-valve reclaims side closure, although primary air fan power down this moment, under the effect of blower fan inertia, also have certain residual air (containing coal gas) to flow through from converter, these gases will diffuse side from T-valve and enter the diffusing tower burning.Yet gas chamber flows through the coal gas that comes and will be blocked in T-valve recovery side and water seal inverted valve, U-shaped water seal, double disc water-sealed valve and this pipeline of gas chamber, can win the time for the subsequent disposal fault like this.For the sake of security, operator have the sufficient time to close the double disc water-sealed valve to on-site manual.Therefore, effectively avoided 1#, 2#, 3# converter when coal-gas recovering, the coal gas of gas chamber pours in down a chimney the danger of rotary kiln, has improved the working efficiency of equipment, for safety and the efficient that satisfies 1#, 2#, 3# RECOVERY OF CONVERTER GAS provides the equipment assurance.
Description of drawings
By the detailed description below in conjunction with accompanying drawing, can more clearly understand above of the present utility model with other feature and advantage, in the accompanying drawings:
Fig. 1 is the control flow schematic diagram that existing Fuzzy control system for coal gas recollection is shown;
Fig. 2 is the schematic block diagram that RECOVERY OF CONVERTER GAS, diffuse channel are shown.
Fig. 3 is the principle schematic that existing Fuzzy control system for coal gas recollection is shown;
Fig. 4 is the principle schematic that illustrates according to the Fuzzy control system for coal gas recollection of exemplary embodiment of the present utility model;
Fig. 5 is the control flow schematic diagram that illustrates according to the Fuzzy control system for coal gas recollection of exemplary embodiment of the present utility model;
(A) among Fig. 6, (B) and (C) be the electric control theory schematic diagram that illustrates according to the unicoil three-way solenoid valve of the Fuzzy control system for coal gas recollection of exemplary embodiment of the present utility model;
(A) among Fig. 7, (B) and (C) be the electrical control program schematic diagram that illustrates according to the unicoil three-way solenoid valve of the Fuzzy control system for coal gas recollection of exemplary embodiment of the present utility model.
Embodiment
Hereinafter, describe with reference to the accompanying drawings exemplary embodiment of the present utility model in detail.Yet exemplary embodiment of the present utility model can be implemented with many different forms, and should not be limited to the example of setting forth here.On the contrary, provide these examples so that the disclosure will be thoroughly also complete, and will pass on fully scope of the present utility model to those skilled in the art.
Fuzzy control system for coal gas recollection according to exemplary embodiment of the present utility model can comprise unicoil three-way solenoid valve and the T-valve that is subjected to the control of unicoil three-way solenoid valve.T-valve can comprise gas entry, coal-gas recovering mouth and coal gas diffusion mouth.Gas entry can receive the gas that reclaims from converter.The coal-gas recovering mouth can be connected to the RECOVERY OF CONVERTER GAS cabinet.The coal gas diffusion mouth can be connected to the coal gas of converter diffusing tower.The T-valve T-valve can optionally be communicated with gas entry and coal-gas recovering mouth or be communicated with gas entry and coal gas diffusion mouth under the control of unicoil three-way solenoid valve, thereby carries out coal-gas recovering or coal gas diffusion.The unicoil three-way solenoid valve can comprise single coil and electro-magnet spool.The unicoil three-way solenoid valve can according to its coil the operation of electric or power failure state control T-valve.Hereinafter come the operation that the control that is subjected to the unicoil three-way solenoid valve of T-valve is carried out is more specifically described with reference to Fig. 4.
Fuzzy control system for coal gas recollection according to exemplary embodiment of the present utility model can also comprise two programmable logic controllers (PLC).The one PLC can produce according to the signal from the outside input control signal for the operation of control Fuzzy control system for coal gas recollection, the 2nd PLC can be connected to a PLC via the magnetic valve explosion-proof control box, thereby receives the control signal for the operation of controlling Fuzzy control system for coal gas recollection that a PLC produces.The 2nd PLC can produce based on the signal of reception the control signal for the operation of control unicoil three-way solenoid valve, the unicoil three-way solenoid valve can be connected to the 2nd PLC, with the control signal of the operation that is used for control unicoil three-way solenoid valve that receives its generation, and control the operation of T-valve according to such control signal.Hereinafter with reference to Fig. 5 to Fig. 7 the control of unicoil three-way solenoid valve is more specifically described.
Fig. 4 is the principle schematic that illustrates according to the Fuzzy control system for coal gas recollection of exemplary embodiment of the present utility model.The brief description of the element that each reference number among Fig. 4 is indicated is as follows:
1---gate valve (source of the gas main valve)
2---stopping valve
3---manual ball valve
4.1---manual ball valve
4.2---manual ball valve
4.3---manual ball valve
5---air filter
6---reducing valve
7---oil sprayer
8---manual ball valve
9---one-way throttle valve
10---twin coil water seal check fast electromagnetic valve (3 position-5 way)
11---metallic hose
12---water seal inverted valve
13---twin coil water seal check is magnetic valve (two-position five-way) at a slow speed
14.1---unicoil water seal water replenishing magnetic valve (two-position five-way)
14.2---unicoil diffuses scouring electromagnetic valve (two-position five-way)
14.3---unicoil reclaims scouring electromagnetic valve (two-position five-way)
14.4---unicoil bypass scouring electromagnetic valve (two-position five-way)
15---the water seal water replenishing valve
16---unicoil three-way solenoid valve (two-position five-way)
16.2---twin coil bypass solenoid valve (two-position five-way)
17---by-pass valve
18---T-valve
19---pressure unit
20.1---diffuse flush valve
20.2---reclaim flush valve
20.3---the bypass flush valve
Total source of the gas is fed into the coal-gas recovering Controlling System of 1# converter, 2# converter and 3# converter according to source of the gas main valve 1, in Fig. 5, only show the coal-gas recovering Controlling System of 1# converter, with as the example according to the Fuzzy control system for coal gas recollection of exemplary embodiment of the present utility model.
As shown in Figure 5, the Fuzzy control system for coal gas recollection according to exemplary embodiment of the present utility model can comprise unicoil three-way solenoid valve 16 and T-valve 18.After the magnetic valve action, with water seal inverted valve 12 open, the recovery side of T-valve 18 is opened, T-valve 18 diffuse side closure, by-pass valve 17 cuts out, coal gas of converter enters in the gas chamber after by T-valve 18, water seal inverted valve 12, (not water filling during non-maintenance) U-shaped water seal, (non-maintenance is opened often) double disc water-sealed valve, coal gas main pipe line; Otherwise water seal inverted valve 12 is closed, T-valve 18 diffuse that side is opened, the recovery side closure of T-valve 18, by-pass valve 17 open, coal gas of converter then enters the diffusing tower burning.
Source of the gas (nitrogen) passes through gate valve (source of the gas main valve) 1 through two arms, thereby is provided to respectively 1# Fuzzy control system for coal gas recollection and 2#, 3# Fuzzy control system for coal gas recollection gas.The below only describes the trend of source of the gas briefly as an example of the 1# converter example.Nitrogen to stopping valve 2, arrives manual ball valve 4.1 by gate valve (source of the gas main valve) 1 again, again by the impurity in air filter 5 filtering gas, again by reducing valve 6 decompressions, again by oil sprayer 7 (oil spray in the pipeline provides lubricated to valve core of the electromagnetic valve), to three arms.An arm divides again after by manual ball valve 4.2 and is clipped to the two-way arm, leads up to the 14.4 control bypass flush valves 20.3 of unicoil bypass scouring electromagnetic valve; Another road is by twin coil bypass solenoid valve 16.2 control by-pass valve 17.An arm divides again after by manual ball valve 4.3 and is clipped to three road arms, leads up to unicoil three-way solenoid valve 16 control T-valve 18; Another road is diffused scouring electromagnetic valve 14.2 controls by unicoil and is diffused flush valve 20.1; The unicoil of leading up to again reclaims scouring electromagnetic valve 14.3 controls and reclaims flush valve 20.2.An arm divides again after by manual ball valve 8 and is clipped to the two-way arm, leads up to unicoil water seal water replenishing magnetic valve 14.1 control water seal water replenishing valves 15; At a slow speed magnetic valve 13 control water seal inverted valves 12 of twin coil water seal check fast electromagnetic valve 10 and twin coil water seal check are passed through again by behind one-way throttle valve 9 adjusting gas flows in another road.In addition, gas can pass through manual ball valve 3, can come the pressure of gas in the detector tube road with pressure unit 19.
For brevity, the below only illustrates the concrete operations of existing Fuzzy control system for coal gas recollection for T-valve 18.
Often open when manual ball valve 4.3 is flat always, and in handling failure or carry out equipment inspection and be used for cutting off source of the gas.Unicoil three-way solenoid valve 16 can comprise single coil and electro-magnet spool.T-valve 18 can comprise twin cylinder, and for example, one is reclaimed cylinder and one and diffuses cylinder.
Control source of the gas (nitrogen) enters unicoil three-way solenoid valve 16 by manual ball valve 4.3.When coal-gas recovering, the coil of unicoil three-way solenoid valve 16 gets electric, and can carry out the gas commutation by its electro-magnet spool, and the control source of the gas is opened.At this moment, nitrogen reclaims cylinder and begins action to the recovery cylinder air feed of T-valve 18.Detect to reclaim after the cylinder action puts in place by the limit, at this moment, be in the coal-gas recovering state.At this moment, the gas entry of T-valve 18 is communicated with the coal-gas recovering mouth.When coal gas diffusion, the coil losing electricity of unicoil three-way solenoid valve 16, therefore its electro-magnet spool closes, and the nitrogen in the recovery cylinder of T-valve 18 carries out the gas commutation by the draught head of unicoil three-way solenoid valve 16, and the control source of the gas is opened.At this moment, nitrogen diffuses the cylinder air feed to T-valve 18, diffuses cylinder and begins action.Detect by the limit and to diffuse after the cylinder action puts in place, at this moment, be in the coal gas diffusion state.At this moment, the gas entry of T-valve 18 is communicated with the coal gas diffusion mouth.
The advantage of unicoil three-way solenoid valve 16 is that coil gets when electric and carries out the gas commutation by the electro-magnet spool, and the draught head by magnetic valve 18 during coil losing electricity carries out the gas commutation.Therefore, unicoil three-way solenoid valve 16 gas that can automatically switch.When if coal gas of converter is reclaiming, if this moment occurs the fault that PLC such as converter system power down or control gas recovery system crashes etc., the coil of unicoil three-way solenoid valve 16 can power down and therefore is in power failure state so.At this moment, unicoil three-way solenoid valve 16 can carry out the gas commutation by draught head, so that the cylinder air feed that diffuses of T-valve 18 moves, burns thereby make coal gas enter 60 meters diffusing towers.That is, unicoil three-way solenoid valve 16 can be electric opening (recovery), dead electricity are closed (diffusing).Therefore, occur crashing such as PLC or the situation of the fault of system power failure etc. under, unicoil three-way solenoid valve 16 is in power failure state, can not keep the recovery state, coal gas can automatic relief.Thereby the coal gas that has prevented from occuring the gas chamber of 8 ten thousand steres pours in down a chimney the danger of returning.
Fig. 5 is the control flow schematic diagram that illustrates according to the Fuzzy control system for coal gas recollection of exemplary embodiment of the present utility model.Principle of work according to the Fuzzy control system for coal gas recollection foundation of exemplary embodiment of the present utility model can be to detect gas content and the oxygen content (O2≤1%, CO 〉=25%) of fan outlet furnace gas by the laser detection instrument.As shown in Figure 5, when satisfying the coal-gas recovering condition, operator send instruction by operation screen, receive operational order by PLC (PLC), and generation also will send to be used to the control signal of the operation of controlling described Fuzzy control system for coal gas recollection the relay housing of electric panel room.The control signal that the one PLC produces is used for controlling the operation of described Fuzzy control system for coal gas recollection can comprise the control signal of the operation that is respectively applied to control each magnetic valve in the described Fuzzy control system for coal gas recollection.The relay housing can comprise a plurality of the first rly.s, and carrying out conversion of signals, and the signal after will changing sends to on-the-spot special electromagnetic valve explosion-proof control box.Controlling box can be connected with the intermediate relay that newly increases (the second rly.) by the terminal connections of for example three-way solenoid valve.The intermediate relay that newly increases will carry out conversion of signals from the signal that controlling box receives, and the signal after will changing is provided to the PLC (the 2nd PLC) that newly increases.Produced for the control signal of controlling the unicoil three-way solenoid valve according to its signal that receives from middle rly. by the PLC that newly increases, and send it to the relay (the 3rd rly.) that newly increases.The relay that newly increases will carry out conversion of signals from the signal that the PLC that newly increases receives, and the signal after will change is provided to the unicoil three-way solenoid valve, thus the action of the unicoil three-way solenoid valve at final control scene.The control of other magnetic valves can be do not changed like this, and the safety interlocking condition of unicoil three-way solenoid valve can be still controlled through explosion-proof control box.
(A) among Fig. 6, (B) and (C) be the electric control theory schematic diagram that illustrates according to the unicoil three-way solenoid valve of the Fuzzy control system for coal gas recollection of exemplary embodiment of the present utility model, (A) among Fig. 7, (B) and (C) be the electrical control program schematic diagram that illustrates according to the unicoil three-way solenoid valve of the Fuzzy control system for coal gas recollection of exemplary embodiment of the present utility model.
The below is for the brief description by the element of each label indication among Fig. 6 and Fig. 7:
Relay K A1
Relay K A1 can comprise coil and contact.Relay K A1 also can be called as intermediate relay.When coal-gas recovering, PLC signal input relay KA1.Because the PLC input signal is 24 volts of volts DSs, the voltage that the coil of relay K A1 need to access explosion-proof control box is 220 volts of voltage of alternating current, so will take " dry contact " to change by intermediate relay.
Relay K A2
Relay K A2 can comprise coil and contact.Relay K A2 also can be called as intermediate relay.When coal gas diffusion, PLC signal input relay KA2.Because the PLC input signal is 24 volts of volts DSs, the voltage that the coil of relay K A2 need to access explosion-proof control box is 220 volts of voltage of alternating current, so will take " dry contact " to change by intermediate relay.
Relay K A3
Relay K A3 can be the relay of control unicoil three-way solenoid valve 16 actions.Can comprise coil and contact.The PLC signal outputs to relay K A3.
Unicoil three-way solenoid valve 16
It is the unicoil three-way solenoid valve of K25D-25 (2 5 logical) that unicoil three-way solenoid valve 16 can be selected model.
Explosion-proof control box BOX
Explosion-proof control box BOX can be the relay controlling box of the action of on-the-spot all magnetic valves of control (for example, water seal check magnetic valve 12, three-way solenoid valve 16, bypass solenoid valve 17 etc.).
L+、M
L+ and M indication PLC template power supply (DC24V).
L、N
L and N instruction sheet coil three-way solenoid valve power supply (AC220V).
1#、2#、3#、7#、9#、11#、13#、15#、17#、19#
1#, 2#, 3#, 7#, 9#, 11#, 13#, 15#, 17# and 19# are respectively connection terminal number.
DI
D1 indication PLC input template.
DO
DO indication PLC output template.
I7.6
I7.6 indication PLC input point (housing comes T-valve to reclaim signal).
I7.7
I7.7 indicates PLC input point (housing comes T-valve to diffuse signal).
Q2.0
Q2.0 indicates PLC output point (three-way solenoid valve control).
M260.5
M260.5 indicates PLC intermediate point (automatic coal gas recovery prerequisite).
Q2.6
Q2.6 indication PLC output point (picture long-range/on the spot).
718、719
718, the 719th, the connection terminal of PLC input template (DI) number.
701
The connection terminal of the 701st, PLC output template (DO) number.
Describe electrical control process according to the unicoil three-way solenoid valve of the Fuzzy control system for coal gas recollection of exemplary embodiment of the present utility model in detail below with reference to Fig. 6 and Fig. 7.
When operation screen is selected long-range, when the automatic coal gas recovering condition satisfies, the normal normally closed point closed, output point Q2.6 of making war of output point Q2.6 in the electrical control program disconnects, intermediate point M260.5 is closed, simultaneously by the on-off control system in the case relay K A1 coil in the electric control loop to be got electric for explosion-proof control box BOX, junction closure.Operator send the coal-gas recovering instruction by operation screen, input point I7.6 in the electrical control program is closed, output point Q2.0 realizes signal output, the simultaneously closed realization program of output point Q2.0 self-locking, output relay KA3 coil in the electric control loop is got electric, junction closure, unicoil three-way solenoid valve 16 electric, carry out the gas commutation by its electro-magnet spool, control source of the gas (nitrogen) is opened.At this moment, nitrogen reclaims cylinder and begins action to the recovery cylinder air feed of the T-valve 18 at scene.Detect to reclaim after the cylinder action puts in place by the limit, the relay K A1 coil losing electricity in the electric control loop, contact disconnects.At this moment, by the auto-lock function of the output point Q2.0 in the electrical control program, make program keep path, coal gas of converter is in the recovery state.In handling failure or when carrying out equipment inspection, can switch to local operation, so in the electrical control program with normal battle, the normally closed some realization program interlock function of output point Q2.6.
When operation screen is selected long-range, when the automatic coal gas recovering condition does not satisfy, intermediate point M260.5 in the electrical control program disconnects, explosion-proof control box BOX makes the relay K A2 coil in the electric control loop get electric by the on-off control system in the case simultaneously, junction closure disconnects the input point I7.7 in the electrical control program.At this moment, sequence of control can not form path, output point Q2.0 can not realize signal output, output relay KA3 coil losing electricity in the electric control loop, contact disconnects, unicoil three-way solenoid valve 16 dead electricity, the electro-magnet spool is closed, nitrogen in the recovery cylinder of on-the-spot T-valve 18 carries out the gas commutation by the draught head of unicoil three-way solenoid valve 16, and nitrogen diffuses the cylinder air feed to T-valve 18, diffuses cylinder and begins action.Detect by the limit and to diffuse after the cylinder action puts in place, the relay K A2 coil losing electricity in the electric control loop, contact disconnects.At this moment, coal gas of converter is in the state of diffusing.Diffuse completely, the venting hole of nitrogen by unicoil three-way solenoid valve 16 that diffuses in the cylinder discharges.
Therefore, whole coal gas diffusion process according to the Fuzzy control system for coal gas recollection of exemplary embodiment of the present utility model is a full-automatic process, so, in preventing of providing of the exemplary embodiment of the present utility model system that coal gas pours in down a chimney, the unicoil three-way solenoid valve gets electric opening (recovery), dead electricity is closed (diffusing), therefore occur crashing such as PLC or the state of the fault of system power failure etc. under, the unicoil three-way solenoid valve is in power failure state, can not keep the recovery state, coal gas can be in the state of diffusing.
In existing Fuzzy control system for coal gas recollection, can only seal gas chamber by operation T-valve, water seal inverted valve, U-shaped water seal, double disc water-sealed valve etc. and pour in down a chimney the coal gas of returning.Yet U-shaped water seal is by manually opening the valve water filling, needs just can fill with water in about 20 minutes; The double disc water-sealed valve is electronic control, needs manually to the execute-in-place button, because the double disc water-sealed valve is very large, needs just can close in about 10 minutes.So can not meet the demands from U-shaped water seal opening time, double disc water-sealed valve.T-valve and water seal inverted valve are electric automatic control, and opening time very fast (about 10 seconds, and the expectation the safety interlocking condition be＜25 seconds).
Another can, prevent that coal gas from pouring in down a chimney if adopt water seal inverted valve to block coal gas, then there are the following problems.If the automatic control system of transformation water seal inverted valve is blocked coal gas and prevented that coal gas from pouring in down a chimney, when coal gas of converter reclaimed, T-valve was in the recovery state so, that is, T-valve reclaims side and opens, and T-valve diffuses side and closes.At this moment, if because the faults such as PLC deadlock that converter system power down or control gas recovery system occur cause water seal inverted valve to be closed at once, can prevent that then coal gas from pouring in down a chimney.Yet, although the primary air fan power down, under the effect of blower fan inertia, the residual air of converter also can enter in the pipeline, so since by-pass valve be close, T-valve diffuse side be close, water seal inverted valve closes, so will build the pressure in this segment pipe.Such situation is quite dangerous.
Therefore, in exemplary embodiment of the present utility model, the mode of the automatic control system of employing transformation T-valve is blocked coal gas and is poured in down a chimney to prevent coal gas.The unicoil three-way solenoid valve be electric opening (recovery), dead electricity is closed (diffusing).Occur when coal gas of converter reclaims in the situation that the PLC of converter system power down or control gas recovery system crashes, the unicoil three-way solenoid valve is in power failure state, can not keep the recovery state, that is, T-valve diffuses that side is opened, T-valve reclaims side closure.At this moment, although the primary air fan power down under the effect of blower fan inertia, also has certain residual air (containing coal gas) to flow through from converter.These gases will diffuse side from T-valve and enter the diffusing tower burning, can not cause pipeline to build the pressure.Gas chamber flows through the coal gas that comes and will be blocked in T-valve recovery side and water seal inverted valve, U-shaped water seal, double disc water-sealed valve and this pipeline of gas chamber, can win the time for the subsequent disposal fault like this, for the sake of security, operator have the sufficient time to close the double disc water-sealed valve to on-site manual.Therefore, effectively avoided 1#, 2#, 3# converter when coal-gas recovering, the coal gas of gas chamber pours in down a chimney the danger of rotary kiln.
The Fuzzy control system for coal gas recollection that the utility model provides can prevent that coal gas from pouring in down a chimney.Specifically, in the Fuzzy control system for coal gas recollection according to exemplary embodiment of the present utility model, the unicoil three-way solenoid valve be electric opening (recovery), dead electricity are closed (diffusing), therefore occur crashing such as PLC or the state of the fault of system power failure etc. under, the unicoil three-way solenoid valve is in power failure state, can not keep the recovery state, coal gas can be in the state of diffusing.Under these circumstances, T-valve diffuses side and opens, and T-valve reclaims side closure, although primary air fan power down this moment, under the effect of blower fan inertia, also have certain residual air (containing coal gas) to flow through from converter, these gases will diffuse side from T-valve and enter the diffusing tower burning.Yet gas chamber flows through the coal gas that comes and will be blocked in T-valve recovery side and water seal inverted valve, U-shaped water seal, double disc water-sealed valve and this pipeline of gas chamber, can win the time for the subsequent disposal fault like this.For the sake of security, operator have the sufficient time to close the double disc water-sealed valve to on-site manual.Therefore, effectively avoided 1#, 2#, 3# converter when coal-gas recovering, the coal gas of gas chamber pours in down a chimney the danger of rotary kiln, has improved the working efficiency of equipment, for safety and the efficient that satisfies 1#, 2#, 3# RECOVERY OF CONVERTER GAS provides the equipment assurance.
Although illustrated and described the example of exemplary embodiment of the present utility model, but what those skilled in the art should understand that is, exemplary embodiment of the present utility model is not limited to this, in the situation that does not break away from the spirit and scope of the present utility model that limit according to claim, can carry out various modifications to these exemplary embodiments.
Claims (5)
1. a Fuzzy control system for coal gas recollection is characterized in that, described Fuzzy control system for coal gas recollection comprises:
T-valve, T-valve comprise gas entry, coal-gas recovering mouth and coal gas diffusion mouth, and gas entry receives the gas that reclaims from converter, and the coal-gas recovering mouth is connected to the RECOVERY OF CONVERTER GAS cabinet, and the coal gas diffusion mouth is connected to the coal gas of converter diffusing tower;
The unicoil three-way solenoid valve, the unicoil three-way solenoid valve comprises single coil and electro-magnet spool, the unicoil three-way solenoid valve gets control T-valve connection gas entry and coal-gas recovering mouth under the electricity condition at coil, to carry out coal-gas recovering, the unicoil three-way solenoid valve is controlled T-valve and is communicated with gas entry and coal gas diffusion mouth under the coil power failure state, to carry out coal gas diffusion;
The first programmable logic controller, the signal that the first programmable logic controller basis is inputted from the outside produces the control signal be used to the operation of controlling described Fuzzy control system for coal gas recollection;
The second programmable logic controller, the second programmable logic controller receive to be used for controlling the control signal of the operation of described Fuzzy control system for coal gas recollection through the magnetic valve explosion-proof control box from the first programmable logic controller, with the control signal of generation for the operation of control unicoil three-way solenoid valve, thereby the unicoil three-way solenoid valve is controlled the operation of T-valve according to the control signal for the operation of controlling the unicoil three-way solenoid valve that receives from the second programmable logic controller.
2. Fuzzy control system for coal gas recollection as claimed in claim 1 is characterized in that, T-valve comprises and reclaim cylinder and diffuse cylinder, wherein:
When carrying out coal-gas recovering, the coil of unicoil three-way solenoid valve gets electric, and carries out the gas commutation by the electro-magnet spool, thereby the control source of the gas is opened and to the recovery cylinder air feed of T-valve, begin action and reach the coal-gas recovering state so that reclaim cylinder;
When carrying out coal gas diffusion, the coil losing electricity of unicoil three-way solenoid valve and electro-magnet spool are closed, carry out the gas commutation by the gas of the control source of the gas supply draught head by the unicoil three-way solenoid valve in the recovery cylinder of T-valve, thereby the control source of the gas is opened and to T-valve diffuse the cylinder air feed begin action and reach the coal gas diffusion state so that diffuse cylinder.
3. Fuzzy control system for coal gas recollection as claimed in claim 2, it is characterized in that, the unicoil three-way solenoid valve also comprises venting hole, wherein, after coal gas diffusion was complete, the venting hole by the unicoil three-way solenoid valve diffused the gas by the supply of control source of the gas in the cylinder.
4. Fuzzy control system for coal gas recollection as claimed in claim 1, it is characterized in that, the first programmable logic controller is constructed to produce the control signal of operation that is used for controlling described Fuzzy control system for coal gas recollection of the control signal that comprises the operation that is respectively applied to control each magnetic valve in the described Fuzzy control system for coal gas recollection.
5. such as any one claim described Fuzzy control system for coal gas recollection of claim 1 to the claim 4, it is characterized in that, described Fuzzy control system for coal gas recollection also comprises:
The first rly., the first rly. are connected between the first programmable logic controller and the magnetic valve explosion-proof control box, and so that the signal that provides from the first programmable logic controller is changed, and the signal after will changing is provided to the magnetic valve explosion-proof control box;
The second rly., the second rly. are connected between magnetic valve explosion-proof control box and the second programmable logic controller, and so that the signal that provides from the magnetic valve explosion-proof control box is changed, and the signal after will changing is provided to the second programmable logic controller;
The 3rd rly., the 3rd rly. are connected between the second programmable logic controller and the unicoil three-way solenoid valve, and with to changing from the signal of the second programmable logic controller, and the signal after will changing is provided to the unicoil three-way solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203901913U CN202744581U (en) | 2012-08-08 | 2012-08-08 | Gas recovery control system of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203901913U CN202744581U (en) | 2012-08-08 | 2012-08-08 | Gas recovery control system of converter |
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| Publication Number | Publication Date |
|---|---|
| CN202744581U true CN202744581U (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203901913U Expired - Lifetime CN202744581U (en) | 2012-08-08 | 2012-08-08 | Gas recovery control system of converter |
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| CN (1) | CN202744581U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359005A (en) * | 2014-11-10 | 2015-02-18 | 河南中鸿集团煤化有限公司 | Automatic recycling device for discharged gas |
| CN105925751A (en) * | 2016-06-15 | 2016-09-07 | 江苏永钢集团有限公司 | Safety converter gas recycling system |
-
2012
- 2012-08-08 CN CN2012203901913U patent/CN202744581U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359005A (en) * | 2014-11-10 | 2015-02-18 | 河南中鸿集团煤化有限公司 | Automatic recycling device for discharged gas |
| CN104359005B (en) * | 2014-11-10 | 2017-02-15 | 河南中鸿集团煤化有限公司 | Automatic recycling device for discharged gas |
| CN105925751A (en) * | 2016-06-15 | 2016-09-07 | 江苏永钢集团有限公司 | Safety converter gas recycling system |
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Granted publication date: 20130220 |