CN101792834A - Automatic sweeping method for gas replaced with nitrogen in blast furnace gas energy recovery system pipe network - Google Patents

Automatic sweeping method for gas replaced with nitrogen in blast furnace gas energy recovery system pipe network Download PDF

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Publication number
CN101792834A
CN101792834A CN201010134152A CN201010134152A CN101792834A CN 101792834 A CN101792834 A CN 101792834A CN 201010134152 A CN201010134152 A CN 201010134152A CN 201010134152 A CN201010134152 A CN 201010134152A CN 101792834 A CN101792834 A CN 101792834A
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valve
electronic
push
pull
complete shut
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CN101792834B (en
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李勇
周宁
柳黎光
翟天奎
李孝民
王华强
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Xian Shaangu Power Co Ltd
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Xian Shaangu Power Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The invention discloses an automatic sweeping method for gas replaced with nitrogen in a blast furnace gas energy recovery system pipe network. The method controls various units arranged in the blast furnace gas energy recovery system pipe network by adopting a PLC (Programmable Logic Controller) or a DSC (Distributed Control System), monitors and controls corresponding devices one by one according to an automatic sweeping flow sequence by the PLC and the DSC, and finally finishes the automatic sweeping function to the gas replaced with nitrogen in the blast furnace gas energy recovery system pipe network. The invention has the remote automatic sweeping function for the gas replaced with nitrogen and has the advantages of decreasing the operation cost of a user and avoiding personal risks.

Description

The automatic sweeping method of gas replaced with nitrogen in blast furnace gas energy recovery system pipe network
Technical field
The invention belongs to the power mechanical engineering field, be specifically related to a kind of automatic sweeping process of gas replaced with nitrogen in blast furnace gas energy recovery system pipe network.
Background technology
The purpose of gas replaced with nitrogen in blast furnace gas energy recovery system pipe network is a remaining coal gas in the system pipe network, under situation without nitrogen replacement, if directly and air displacement may cause some unnecessary security incidents.Therefore, this replacement operator process is unavoidable in industrial production.
At present, domestic also do not have producer to be implemented in the blast furnace gas energy recovery system pipe network, in the process of nitrogen replacement coal gas, realizes the automatic purging function of nitrogen replacement coal gas.For nitrogen replacement coal gas, the equipment that domestic manufacturer disposes on gaspipe network is varied, does not seek unity of standard basically.But all adopt the on-site manual operation, the on-the-spot operational mode of confirming of combination technology personnel.
Be accompanied by improving constantly of current industrial level of automation, factors such as human cost and personnel safety are more and more paid attention to by most of enterprise.The lag that manual operation adds the on-the-spot nitrogen replacement coal gas technology of confirming of technician slowly manifested to come out.Because it is unavoidable some gas leak in the process of whole nitrogen replacement coal gas.The security personnel that this replacement process needs the technician, have a gas mask carry out manual operation according to field condition to the relevant device in the gaspipe network, and the running status and the exhaust situation of relevant device are artificially judged.Can't realize on-the-spot unattended remote auto operator scheme.So this manual operation mode needs the special messenger to be responsible for, danger is high, operation cost is bigger.
Summary of the invention
The objective of the invention is to, a kind of automatic sweeping method of gas replaced with nitrogen in blast furnace gas energy recovery system pipe network is provided, have the nitrogen replacement coal gas remote and purge function automatically, reduce user's operation cost and Personal Risk's characteristics.
To achieve these goals, the technical solution of the present invention's employing is:
A kind of automatic blowing method of gas replaced with nitrogen in blast furnace gas energy recovery system pipe network, it is characterized in that, this method adopts programmable logic controller PLC or distributed control system DCS that each unit that disposes in the blast furnace gas energy recovery system pipe network is controlled, and each cell position relation of configuration is as follows in the described blast furnace gas energy recovery system pipe network:
A) the reducing valve group is connected on the blast furnace gas pipeline from iron-smelting blast furnace, and reducing valve group inlet end disposes first branch road, and the exit end of reducing valve group disposes second branch road;
B) first branch road comprises: at the inlet end configuration inlet electric butterfly valve and the electronic push-pull valve of inlet of reducing valve group, inlet electric butterfly valve and entering the mouth disposes the electronic valve that diffuses before the inlet push-pull valve between the electronic push-pull valve, dispose the electronic valve that diffuses behind the inlet push-pull valve on the pipeline after the electronic push-pull valve that enters the mouth;
C) second branch road comprises: at the exit end configuration outlet electric butterfly valve and the electronic push-pull valve of outlet of reducing valve group, outlet electric butterfly valve and exporting disposes the electronic valve that diffuses behind the outlet push-pull valve between the electronic push-pull valve, dispose preceding electronic valve, the electronic intake valve of nitrogen purging 1#, the purging air channel motorized valve of diffusing of outlet push-pull valve respectively after exporting electronic push-pull valve, and the blast furnace gas energy recycle device that has the stator blade system, the blast furnace gas energy recycle device is equipped with load;
D) the electronic push-pull valve of inlet is connected to an end of blast furnace gas energy recycle device by the 1# by-pass valve that surges of parallel connection, the 2# by-pass valve that surges, and is communicated with the electronic push-pull valve of outlet;
E) the electronic push-pull valve of inlet is cut the other end that valve, electronic equalizing valve are connected to the blast furnace gas energy recycle device soon by surging of parallel connection;
Wherein, the electronic intake valve of described nitrogen purging 1# connects the electronic intake valve of nitrogen purging 2#, and described purging air channel motorized valve is communicated with water seal overflow motorized valve, water seal water inlet motorized valve, water seal draining motorized valve and air purge gas blower respectively;
Above-mentioned inlet electric butterfly valve, electronic push-pull valve enters the mouth, the 1# by-pass valve surges, the 2# by-pass valve surges, surge and cut valve soon, electronic equalizing valve, the stator blade system of blast furnace gas energy recycle device, export electronic push-pull valve, the outlet electric butterfly valve, the electronic valve that diffuses before the inlet push-pull valve, the electronic valve that diffuses behind the inlet push-pull valve, the electronic valve that diffuses before the outlet push-pull valve, the electronic valve that diffuses behind the outlet push-pull valve, the electronic intake valve of nitrogen purging 1#, the electronic intake valve of nitrogen purging 2#, purge the air channel motorized valve, water seal overflow motorized valve, water seal water inlet motorized valve, water seal draining motorized valve, the air purge gas blower inserts programmable logic controller or distributed control system respectively;
Programmable logic controller or distributed control system are monitored and are controlled each equipment in the pipe network one by one according to setting program, and carry out automatic sweeping process, and concrete sweeping process is as follows automatically:
Inlet electric butterfly valve complete shut-down, electronic push-pull valve complete shut-down and clamping enter the mouth, outlet electric butterfly valve complete shut-down, export electronic push-pull valve complete shut-down and clamping, surge and cut the valve complete shut-down soon, electronic equalizing valve complete shut-down, the 1# by-pass valve complete shut-down that surges, 2# by-pass valve complete shut-down surges, the stator blade system complete shut-down of blast furnace gas energy recycle device, the electronic valve complete shut-down that diffuses before the inlet push-pull valve, the electronic valve complete shut-down that diffuses behind the inlet push-pull valve, the electronic valve complete shut-down that diffuses before the outlet push-pull valve, the electronic valve complete shut-down that diffuses behind the outlet push-pull valve, the electronic intake valve complete shut-down of nitrogen purging 1#, the electronic intake valve complete shut-down of nitrogen purging 2# purges air channel motorized valve complete shut-down, the air purge gas blower is stopped transport, water seal draining motorized valve valve complete shut-down, water seal overflow motorized valve standard-sized sheet, water seal water inlet motorized valve standard-sized sheet;
Enter nitrogen replacement coal gas, the electronic valve standard-sized sheet that diffuses before the outlet push-pull valve, the electronic intake valve standard-sized sheet of nitrogen purging 1#, the electronic intake valve standard-sized sheet of nitrogen purging 2#, after time-delay, the stator blade system standard-sized sheet of blast furnace gas energy recycle device, electronic equalizing valve standard-sized sheet, surge and cut the valve standard-sized sheet soon, the 1# by-pass valve standard-sized sheet that surges, 2# by-pass valve standard-sized sheet surges, the electronic valve standard-sized sheet that diffuses behind the inlet push-pull valve, the electronic valve complete shut-down that diffuses before the outlet push-pull valve, time-delay, the electronic intake valve complete shut-down of nitrogen purging 2#, the electronic intake valve complete shut-down of nitrogen purging 1#, the stator blade system complete shut-down of blast furnace gas energy recycle device surges and cuts the valve complete shut-down soon, electronic equalizing valve complete shut-down, 1# by-pass valve complete shut-down surges, the 2# by-pass valve complete shut-down that surges, the electronic valve complete shut-down that diffuses behind the inlet push-pull valve, the automatic sweeping process of nitrogen replacement coal gas finishes.
The automatic sweeping process of gas replaced with nitrogen in blast furnace gas energy recovery system pipe network of the present invention is reasonable in design; It is various to have solved the interior equipment configuration of current blast furnace gas energy recovery system pipe network, and the nitrogen replacement course of gas can't realize the problem that remote auto purges; Realized the automatic operation mode of sequencing, had on-the-spot unattended nitrogen replacement coal gas remote and purge function automatically, reduce user's operation cost and Personal Risk's characteristics.
Description of drawings
Fig. 1 is the configuration structure synoptic diagram of blast furnace gas energy recovery system pipe network.
Label among Fig. 1 is represented respectively: 1, the inlet electric butterfly valve, 2, electronic push-pull valve enters the mouth, 3, the 1# by-pass valve surges, 4, the 2# by-pass valve surges, 5, surge and cut valve soon, 6, electronic equalizing valve, 7, the stator blade system of blast furnace gas energy recycle device, 8, export electronic push-pull valve, 9, the outlet electric butterfly valve, 10, the electronic valve that diffuses before the inlet push-pull valve, 11, the electronic valve that diffuses behind the inlet push-pull valve, 12, the electronic valve that diffuses before the outlet push-pull valve, 13, the electronic valve that diffuses behind the outlet push-pull valve, 14, the electronic intake valve of nitrogen purging 1#, 15, the electronic intake valve of nitrogen purging 2#, 16, purge the air channel motorized valve, 17, water seal overflow motorized valve, 18, water seal water inlet motorized valve, 19, water seal draining motorized valve, 20, the air purge gas blower, 21, programmable logic controller PLC or distributed control system DCS, 22, the reducing valve group, 23, the blast furnace gas energy recycle device, 24, load;
The present invention is described in further detail below in conjunction with specific embodiment.
Embodiment
The first step, the configuration structure synoptic diagram that requires the blast furnace gas energy recovery system pipe network be as shown in Figure 1:
A) reducing valve group 22 is connected on the blast furnace gas pipeline from iron-smelting blast furnace, and reducing valve group 22 inlet ends dispose first branch road, and the exit end of reducing valve group 22 disposes second branch road;
B) first branch road comprises: at the inlet end configuration inlet electric butterfly valve 1 and the electronic push-pull valve 2 of inlet of reducing valve group 22, inlet electric butterfly valve 1 and entering the mouth disposes the electronic valve 10 that diffuses before the inlet push-pull valve between the electronic push-pull valve 2, dispose the electronic valve 11 that diffuses behind the inlet push-pull valve on the pipeline after the electronic push-pull valve 2 that enters the mouth;
C) second branch road comprises: at the exit end configuration outlet electric butterfly valve 9 and the electronic push-pull valve 8 of outlet of reducing valve group 22, outlet electric butterfly valve 9 and exporting disposes the electronic valve 13 that diffuses behind the outlet push-pull valve between the electronic push-pull valve 8, dispose preceding electronic valve 12, the electronic intake valve 14 of nitrogen purging 1#, the purging air channel motorized valve 16 of diffusing of outlet push-pull valve respectively after exporting electronic push-pull valve 8, and the blast furnace gas energy recycle device 23 that has stator blade system 7, blast furnace gas energy recycle device 23 is equipped with load 24;
D) the electronic push-pull valve 2 of inlet is connected to an end of blast furnace gas energy recycle device 23 by the 1# by-pass valve 3 that surges of parallel connection, the 2# by-pass valve 4 that surges, and is communicated with the electronic push-pull valve 8 of outlet;
E) the electronic push-pull valve 2 of inlet is cut the other end that valve 5, electronic equalizing valve 6 are connected to blast furnace gas energy recycle device 23 soon by surging of parallel connection;
Wherein, the electronic intake valve 14 of described nitrogen purging 1# connects the electronic intake valve 15 of nitrogen purging 2#, and described purging air channel motorized valve 16 is communicated with water seal overflow motorized valve 17, water seal water inlet motorized valve 18, water seal draining motorized valve 19 and air purge gas blower 20 respectively;
Above-mentioned inlet electric butterfly valve 1, electronic push-pull valve 2 enters the mouth, 1# by-pass valve 3 surges, 2# by-pass valve 4 surges, surge and cut valve 5 soon, electronic equalizing valve 6, the stator blade system 7 of blast furnace gas energy recycle device, export electronic push-pull valve 8, outlet electric butterfly valve 9, the electronic valve 10 that diffuses before the inlet push-pull valve, the electronic valve 11 that diffuses behind the inlet push-pull valve, the electronic valve 12 that diffuses before the outlet push-pull valve, the electronic valve 13 that diffuses behind the outlet push-pull valve, the electronic intake valve 14 of nitrogen purging 1#, the electronic intake valve 15 of nitrogen purging 2#, purge air channel motorized valve 16, water seal overflow motorized valve 17, water seal water inlet motorized valve 18, water seal draining motorized valve 19, air purge gas blower 20 inserts programmable logic controller PLC or distributed control system DCS21 respectively;
Programmable logic controller PLC or distributed control system DCS21 monitor and control each equipment in the pipe network one by one according to setting program, and carry out automatic sweeping process, and concrete sweeping process is as follows automatically:
The valve wide open signal that puts in place with inlet electric butterfly valve 1 among Fig. 1, the complete shut-down signal that puts in place, drive valve and open/stop signal, close valve and open/stop signal, open the valve run signal, close the valve run signal, the valve of electronic push-pull valve 2 of entering the mouth unclamps the signal that puts in place, the clamping signal that puts in place, plate in-position signal drives away, close the limp signal that puts in place, unclamp/clamping motor unclamps and opens/stop signal, unclamp/clamping motor clamps and to open/to stop signal, ON/OFF is walked the board motor plate that drives away and is opened/stop signal, ON/OFF is walked board motor pass limp and is opened/stop signal, unclamp/clamping motor unclamps run signal, unclamp/clamping motor clamping run signal, ON/OFF is walked the board motor plate run signal that drives away, ON/OFF is walked board motor pass limp run signal, the 4-20mA valve position feedback signal of 1# by-pass valve 3 surges, 4-20mA valve position control signal, the 4-20mA valve position feedback signal of 2# by-pass valve 4 surges, 4-20mA valve position control signal, the valve wide open of cutting valve 5 soon of the surging signal that puts in place, the valve complete shut-down signal that puts in place, the valve signal that moves about, valve is opened signal slowly, valve quick closing valve signal, the valve wide open of electronic equalizing valve 6 signal that puts in place, the complete shut-down signal that puts in place, drive valve and open/stop signal, close valve and open/stop signal, open the valve run signal, close the valve run signal, the 4-20mA stator blade position feed back signal of the stator blade system 7 of blast furnace gas energy recycle device 23,4-20mA stator blade position control signal, the valve that exports electronic push-pull valve 8 unclamps the signal that puts in place, the clamping signal that puts in place, plate in-position signal drives away, close the limp signal that puts in place, unclamp/clamping motor unclamps and opens/stop signal, unclamp/clamping motor clamps and to open/to stop signal, ON/OFF is walked the board motor plate that drives away and is opened/stop signal, ON/OFF is walked board motor pass limp and is opened/stop signal, unclamp/clamping motor unclamps run signal, unclamp/clamping motor clamping run signal, ON/OFF is walked the board motor plate run signal that drives away, ON/OFF is walked board motor pass limp run signal, the valve wide open signal that puts in place of outlet electric butterfly valve 9, the complete shut-down signal that puts in place, drive valve and open/stop signal, close valve and open/stop signal, open the valve run signal, close the valve run signal, the electronic valve wide open that diffuses valve 10 signal that puts in place before the inlet push-pull valve, the complete shut-down signal that puts in place, drive valve and open/stop signal, close valve and open/stop signal, open the valve run signal, close the valve run signal, the electronic valve wide open that diffuses valve 11 signal that puts in place behind the inlet push-pull valve, the complete shut-down signal that puts in place, drive valve and open/stop signal, close valve and open/stop signal, open the valve run signal, close the valve run signal, the electronic valve wide open that diffuses valve 12 signal that puts in place before the outlet push-pull valve, the complete shut-down signal that puts in place, drive valve and open/stop signal, close valve and open/stop signal, open the valve run signal, close the valve run signal, the electronic valve wide open that diffuses valve 13 signal that puts in place behind the outlet push-pull valve, the complete shut-down signal that puts in place, drive valve and open/stop signal, close valve and open/stop signal, open the valve run signal, close the valve run signal, the valve wide open of the electronic intake valve 14 of the nitrogen purging 1# signal that puts in place, the complete shut-down signal that puts in place, drive valve and open/stop signal, close valve and open/stop signal, open the valve run signal, close the valve run signal, the valve wide open of the electronic intake valve 15 of the nitrogen purging 2# signal that puts in place, the complete shut-down signal that puts in place, drive valve and open/stop signal, close valve and open/stop signal, open the valve run signal, close the valve run signal, the valve wide open that purges air channel motorized valve 16 signal that puts in place, the complete shut-down signal that puts in place, drive valve and open/stop signal, close valve and open/stop signal, open the valve run signal, close the valve run signal, the valve wide open of water seal overflow motorized valve 17 signal that puts in place, the complete shut-down signal that puts in place, drive valve and open/stop signal, close valve and open/stop signal, open the valve run signal, close the valve run signal, the valve wide open of water seal water inlet motorized valve 18 signal that puts in place, the complete shut-down signal that puts in place, drive valve and open/stop signal, close valve and open/stop signal, open the valve run signal, close the valve run signal, the valve wide open of water seal draining motorized valve 19 signal that puts in place, the complete shut-down signal that puts in place, drive valve and open/stop signal, close valve and open/stop signal, open the valve run signal, close the valve run signal and insert programmable logic controller PLC or distributed control system DCS21.Air purge gas blower startup/stop signal, fan operation signal, the blower fan stoppage in transit signal of air purge gas blower 20 are inserted programmable logic controller PLC or distributed control system DCS21.
Second step, by programmable logic controller PLC or distributed control system DCS21 according to following automatic sweeping process order, one by one relevant device is monitored and controlled, finish automatic purging function the nitrogen replacement coal gas in the blast furnace gas energy recovery system pipe network.Concrete automatic sweeping process is as follows:
Nitrogen replacement coal gas begins:
Inlet electric butterfly valve 1 complete shut-down: by programmable logic controller PLC or distributed control system DCS21 the valve place state of inlet electric butterfly valve 1 is judged,, then carried out next flow process if the valve place feedback information of inlet electric butterfly valve 1 puts in place for the valve complete shut-down; If not, then programmable logic controller PLC or distributed control system DCS21 send automatically the inlet electric butterfly valve 1 pass valve order, up to it receive the inlet electric butterfly valve 1 the valve place feedback information put in place for the valve complete shut-down till, carry out next flow process again;
Electronic push-pull valve 2 complete shut-downs and clamping enter the mouth: by programmable logic controller PLC or distributed control system DCS21 the valve place state of the electronic push-pull valve 2 that enters the mouth is judged, if the valve place feedback information of the electronic push-pull valve 2 of inlet puts in place for the valve complete shut-down puts in place and clamps, then carry out next flow process; If not, then programmable logic controller PLC or distributed control system DCS21 at first judge the unclamping of the electronic push-pull valve 2 that enters the mouth/clamped position, unclamp and put in place if the valve place feedback information is a valve, then by programmable logic controller PLC or distributed control system DCS21 the ON/OFF of the electronic push-pull valve 2 that enters the mouth is walked board motor and send pass limp order, the ON/OFF limp valve place feedback information that receives the electronic push-pull valve 2 of inlet up to it is till valve pass limp puts in place.Then, by programmable logic controller PLC or distributed control system DCS21 the unclamping of the electronic push-pull valve 2 that enters the mouth/clamping motor is sent and clamps order, the unclamping of electronic push-pull valve 2/the pinch valve position feedback information is till valve clip is tightened to the position, to carry out next flow process again to receive inlet up to it; If programmable logic controller PLC or distributed control system DCS21 are to the unclamping of the electronic push-pull valve 2 that enters the mouth/when clamped position is judged, if the valve place feedback information is that valve clip is tightened to the position, then the unclamping of the electronic push-pull valve 2 that enters the mouth/clamping motor is sent release command by programmable logic controller PLC or distributed control system DCS21, up to it receive the unclamping of the electronic push-pull valve 2 of inlet/pinch valve position feedback information be valve unclamp put in place till.Then, by programmable logic controller PLC or distributed control system DCS21 the ON/OFF of the electronic push-pull valve 2 that enters the mouth is walked board motor and send pass limp order, the ON/OFF limp valve place feedback information that receives the electronic push-pull valve 2 of inlet up to it is till valve pass limp puts in place.At last, by programmable logic controller PLC or distributed control system DCS21 the unclamping of the electronic push-pull valve 2 that enters the mouth/clamping motor is sent and clamps order, the unclamping of electronic push-pull valve 2/the pinch valve position feedback information is till valve clip is tightened to the position, to carry out next flow process again to receive inlet up to it;
Outlet electric butterfly valve 9 complete shut-downs: by programmable logic controller PLC or distributed control system DCS21 the valve place state of outlet electric butterfly valve 9 is judged,, carried out next flow process if the valve place feedback information of outlet electric butterfly valve 9 puts in place for the valve complete shut-down; If not, then programmable logic controller PLC or distributed control system DCS21 send automatically the outlet electric butterfly valve 9 pass valve order, up to it receive the outlet electric butterfly valve 9 the valve place feedback information put in place for the valve complete shut-down till, carry out next flow process again;
Export electronic push-pull valve 8 complete shut-downs and clamping: the valve place state that exports electronic push-pull valve 8 is judged by programmable logic controller PLC or distributed control system DCS21, if the valve place feedback information of the electronic push-pull valve 8 of outlet puts in place for the valve complete shut-down puts in place and clamps, then carry out next flow process; If not, then programmable logic controller PLC or distributed control system DCS21 at first judge exporting the unclamping of electronic push-pull valve 8/clamped position, unclamp and put in place if the valve place feedback information is a valve, then by programmable logic controller PLC or distributed control system DCS21 the ON/OFF that exports electronic push-pull valve 8 is walked board motor and send pass limp order, the ON/OFF limp valve place feedback information that receives the electronic push-pull valve 8 of outlet up to it is till valve pass limp puts in place.Then, send and clamp order exporting the unclamping of electronic push-pull valve 8/clamping motor by programmable logic controller PLC or distributed control system DCS21, the unclamping of electronic push-pull valve 8/the pinch valve position feedback information is till valve clip is tightened to the position, to carry out next flow process again to receive outlet up to it; If programmable logic controller PLC or distributed control system DCS21 are to exporting the unclamping of electronic push-pull valve 8/when clamped position is judged, the valve place feedback information is that valve clip is tightened to the position, then send release command to exporting the unclamping of electronic push-pull valve 8/clamping motor by programmable logic controller PLC or distributed control system DCS21, up to it receive the unclamping of the electronic push-pull valve 8 of outlet/pinch valve position feedback information be valve unclamp put in place till.Then, by programmable logic controller PLC or distributed control system DCS21 the ON/OFF that exports electronic push-pull valve 8 is walked board motor and send pass limp order, the ON/OFF limp valve place feedback information that receives the electronic push-pull valve 8 of outlet up to it is till valve pass limp puts in place.At last, send and clamp order exporting the unclamping of electronic push-pull valve 8/clamping motor by programmable logic controller PLC or distributed control system DCS21, the unclamping of electronic push-pull valve 8/the pinch valve position feedback information is till valve clip is tightened to the position, to carry out next flow process again to receive outlet up to it;
Surge and cut valve 5 complete shut-downs soon: judge by the valve place state that programmable logic controller PLC or distributed control system DCS21 cut valve 5 soon to surging,, then carry out next flow process if the valve place feedback information of cutting valve 5 soon that surges puts in place for the valve complete shut-down; If not, then programmable logic controller PLC or distributed control system DCS21 send the valve quick closing valve order of surging and cutting valve 5 soon, receive till the valve place feedback information of cutting valve 5 soon of surging puts in place for the valve complete shut-down up to it, carry out next flow process again;
Electronic equalizing valve 6 complete shut-downs: by programmable logic controller PLC or distributed control system DCS21 the valve place state of electronic equalizing valve 6 is judged,, then carried out next flow process if the valve place feedback information of electronic equalizing valve 6 puts in place for the valve complete shut-down; If not, then programmable logic controller PLC or distributed control system DCS21 send the pass valve order of electronic equalizing valve 6, till the valve place feedback information that it receives electronic equalizing valve 6 puts in place for the valve complete shut-down, carry out next flow process again;
1# by-pass valve 3 complete shut-downs surge: by programmable logic controller PLC or distributed control system DCS21 the valve place state of the 1# by-pass valve 3 that surges is judged, if the valve place feedback information of the 1# by-pass valve 3 that surges puts in place for the valve complete shut-down, then carried out next flow process; If not, then programmable logic controller PLC or the distributed control system DCS21 valve that sends the 1# by-pass valve 3 that surges closes the valve order, till the valve place feedback information that it receives the 1# by-pass valve 3 that surges puts in place for the valve complete shut-down, carries out next flow process again;
2# by-pass valve 4 complete shut-downs surge: by programmable logic controller PLC or distributed control system DCS21 the valve place state of the 2# by-pass valve 4 that surges is judged, if the valve place feedback information of the 2# by-pass valve 4 that surges puts in place for the valve complete shut-down, then carried out next flow process; If not, then programmable logic controller PLC or the distributed control system DCS21 valve that sends the 2# by-pass valve 4 that surges closes the valve order, till the valve place feedback information that it receives the 2# by-pass valve 4 that surges puts in place for the valve complete shut-down, carries out next flow process again;
Stator blade system 7 complete shut-downs of blast furnace gas energy recycle device: the stator blade location status of the stator blade system 7 of blast furnace gas energy recycle device is judged by programmable logic controller PLC or distributed control system DCS21, if the stator blade position feedback information of the stator blade system 7 of blast furnace gas energy recycle device is a stator blade to be in complete shut-down and to put in place, then carry out next flow process; If not, then programmable logic controller PLC or distributed control system DCS21 send the pass stator blade order of the stator blade system 7 of blast furnace gas energy recycle device, till the stator blade position feedback information that it receives the stator blade system 7 of blast furnace gas energy recycle device puts in place for the stator blade complete shut-down, carry out next flow process again;
Electronic valve 10 complete shut-downs that diffuse before the inlet push-pull valve: by programmable logic controller PLC or distributed control system DCS21 to the inlet push-pull valve before the electronic valve place state that diffuses valve 10 judge, if the electronic valve place feedback information that diffuses valve 10 puts in place for the valve complete shut-down before the inlet push-pull valve, then carry out next flow process; If not, then programmable logic controller PLC or distributed control system DCS21 send the preceding electronic pass valve order of diffusing valve 10 of inlet push-pull valve, till the electronic valve place feedback information that diffuses valve 10 puts in place for the valve complete shut-down before it receives the inlet push-pull valve, carry out next flow process again;
Electronic valve 11 complete shut-downs that diffuse behind the inlet push-pull valve: by programmable logic controller PLC or distributed control system DCS21 to the inlet push-pull valve after the electronic valve place state that diffuses valve 11 judge, if the electronic valve place feedback information that diffuses valve 11 puts in place for the valve complete shut-down behind the inlet push-pull valve, then carry out next flow process; If not, then programmable logic controller PLC or distributed control system DCS21 send the inlet push-pull valve after electronic pass valve order of diffusing valve 11, till the electronic valve place feedback information that diffuses valve 11 puts in place for the valve complete shut-down after it receives the inlet push-pull valve, carry out next flow process again;
Electronic valve 12 complete shut-downs that diffuse before the outlet push-pull valve: the electronic valve place state that diffuses valve 12 before exporting push-pull valve is judged by programmable logic controller PLC or distributed control system DCS21, if the electronic valve place feedback information that diffuses valve 12 puts in place for the valve complete shut-down before the outlet push-pull valve, then carry out next flow process; If not, then programmable logic controller PLC or distributed control system DCS21 send the preceding electronic pass valve order of diffusing valve 12 of outlet push-pull valve, till the electronic valve place feedback information that diffuses valve 12 puts in place for the valve complete shut-down before it receives the outlet push-pull valve, carry out next flow process again;
Electronic valve 13 complete shut-downs that diffuse behind the outlet push-pull valve: the electronic valve place state that diffuses valve 13 after exporting push-pull valve is judged by programmable logic controller PLC or distributed control system DCS21, if the electronic valve place feedback information that diffuses valve 13 puts in place for the valve complete shut-down behind the outlet push-pull valve, then carry out next flow process; If not, then programmable logic controller PLC or distributed control system DCS21 send the outlet push-pull valve after electronic pass valve order of diffusing valve 13, up to it receive outlet behind the push-pull valve electronic diffuse valve 13 position feedback informations and put in place for the valve complete shut-down till, carry out next flow process again;
Electronic intake valve 14 complete shut-downs of nitrogen purging 1#: the valve place state of the electronic intake valve 14 of nitrogen purging 1# is judged by programmable logic controller PLC or distributed control system DCS21, if the valve place feedback information of the electronic intake valve 14 of nitrogen purging 1# puts in place for the valve complete shut-down, then carry out next flow process; If not, then programmable logic controller PLC or distributed control system DCS21 send the pass valve order of the electronic intake valve 14 of nitrogen purging 1#, receive till electronic intake valve 14 position feedback informations of nitrogen purging 1# put in place for the valve complete shut-down up to it, carry out next flow process again;
Electronic intake valve 15 complete shut-downs of nitrogen purging 2#: the valve place state of the electronic intake valve 15 of nitrogen purging 2# is judged by programmable logic controller PLC or distributed control system DCS21, if the valve place feedback information of the electronic intake valve 15 of nitrogen purging 2# puts in place for the valve complete shut-down, then carry out next flow process; If not, then programmable logic controller PLC or distributed control system DCS21 send the pass valve order of the electronic intake valve 15 of nitrogen purging 2#, receive till electronic intake valve 15 position feedback informations of nitrogen purging 2# put in place for the valve complete shut-down up to it, carry out next flow process again;
Purge air channel motorized valve 16 complete shut-downs: the valve place state that purges air channel motorized valve 16 is judged by programmable logic controller PLC or distributed control system DCS21, put in place for the valve complete shut-down if purge the valve place feedback information of air channel motorized valve 16, then carry out next flow process; If not, then programmable logic controller PLC or distributed control system DCS21 send the pass valve order that purges air channel motorized valve 16, receive till the valve place feedback information that purges air channel motorized valve 16 puts in place for the valve complete shut-down up to it, carry out next flow process again;
Air purge gas blower 20 is stopped transport: by programmable logic controller PLC or distributed control system DCS21 the running status of air purge gas blower 20 is judged, if the running status feedback information of air purge gas blower 20 is a fan operation, then carried out next flow process; If not, then programmable logic controller PLC or distributed control system DCS21 send ceasing and desisting order of air purge gas blower 20, and the running status feedback information that receives air purge gas blower 20 up to it is that blower fan is stopped transport, and carries out next flow process again;
Water seal draining motorized valve 19 complete shut-downs: the valve place state of water seal draining motorized valve 19 is judged by programmable logic controller PLC or distributed control system DCS21, if the valve place feedback information of water seal draining motorized valve 19 puts in place for the valve complete shut-down, then carry out next flow process; If not, then programmable logic controller PLC or distributed control system DCS21 send the pass valve order of water seal draining motorized valve 19, till the valve place feedback information that it receives water seal draining motorized valve 19 puts in place for the valve complete shut-down, carry out next flow process again;
Water seal overflow motorized valve 17 standard-sized sheets: the valve place state of water seal overflow motorized valve 17 is judged by programmable logic controller PLC or distributed control system DCS21, if the valve place feedback information of water seal overflow motorized valve 17 is that valve wide open puts in place, then carry out next flow process; If not, what then programmable logic controller PLC or distributed control system DCS21 sent water seal overflow motorized valve 17 opens the valve order, and the valve place feedback information that receives water seal overflow motorized valve 17 up to it is till valve wide open puts in place, to carry out next flow process again;
Water seal water inlet motorized valve 18 standard-sized sheets: the valve place state of water seal water inlet motorized valve 18 is judged by programmable logic controller PLC or distributed control system DCS21, if the valve place feedback information of water seal water inlet motorized valve 18 is that valve wide open puts in place, then carry out next flow process; If not, what then programmable logic controller PLC or distributed control system DCS21 sent water seal water inlet motorized valve 18 opens the valve order, and the valve place feedback information that receives water seal water inlet motorized valve 18 up to it is till valve wide open puts in place, to carry out next flow process again;
Enter nitrogen replacement coal gas, electronic valve 12 standard-sized sheets that diffuse before the outlet push-pull valve: by programmable logic controller PLC or distributed control system DCS21 send outlet before the push-pull valve electronic diffuse valve 12 open the valve order, the electronic valve place feedback information that diffuses valve 12 is till valve wide open puts in place, to carry out next flow process again before it receives the outlet push-pull valve;
Electronic intake valve 14 standard-sized sheets of nitrogen purging 1#: open the valve order by what programmable logic controller PLC or distributed control system DCS21 sent the electronic intake valve 14 of nitrogen purging 1#, the valve place feedback information that receives the electronic intake valve 14 of nitrogen purging 1# up to it is till valve wide open puts in place, to carry out next flow process again;
Electronic intake valve 15 standard-sized sheets of nitrogen purging 2#: open the valve order by what programmable logic controller PLC or distributed control system DCS21 sent the electronic intake valve 15 of nitrogen purging 2#, the valve place feedback information that receives the electronic intake valve 15 of nitrogen purging 2# up to it is till valve wide open puts in place, to carry out next flow process again;
Time-delay: the evacuation time of on-the-spot test is a benchmark when debugging for the first time, adds 5 fens clock times program internal delay time time as programmable logic controller PLC or distributed control system DCS21 again;
Stator blade system 7 standard-sized sheets of blast furnace gas energy recycle device: send by programmable logic controller PLC or distributed control system DCS21 the blast furnace gas energy recycle device stator blade system 7 open the stator blade order, till the stator blade position feedback information that it receives the stator blade system 7 of blast furnace gas energy recycle device puts in place for the stator blade standard-sized sheet, carry out next flow process again;
Electronic equalizing valve 6 standard-sized sheets: open the valve order by what programmable logic controller PLC or distributed control system DCS21 sent electronic equalizing valve 6, the valve place feedback information that receives electronic equalizing valve 6 up to it is till valve wide open puts in place, to carry out next flow process again;
Surge and cut valve 5 standard-sized sheets soon: send the valve of cutting valve 5 soon that surges by programmable logic controller PLC or distributed control system DCS21 and open order slowly, receiving the valve place feedback information of cutting valve 5 soon that surges up to it is till valve wide open puts in place, to carry out next flow process again;
1# by-pass valve 3 standard-sized sheets surge: the valve that is sent the 1# by-pass valve 3 that surges by programmable logic controller PLC or distributed control system DCS21 is opened the valve order, the valve place feedback information that receives the 1# by-pass valve 3 that surges up to it is till valve wide open puts in place, to carry out next flow process again;
2# by-pass valve 4 standard-sized sheets surge: the valve that is sent the 2# by-pass valve 4 that surges by programmable logic controller PLC or distributed control system DCS21 is opened the valve order, the valve place feedback information that receives the 2# by-pass valve 4 that surges up to it is till valve wide open puts in place, to carry out next flow process again;
Electronic valve 11 standard-sized sheets that diffuse behind the inlet push-pull valve: by programmable logic controller PLC or distributed control system DCS21 send inlet behind the push-pull valve electronic diffuse valve 11 open the valve order, the electronic valve place feedback information that diffuses valve 11 is till valve wide open puts in place, to carry out next flow process again after it receives the inlet push-pull valve;
The outlet push-pull valve before electronic valve 12 complete shut-downs that diffuse: by programmable logic controller PLC or distributed control system DCS21 send the outlet push-pull valve before electronic pass valve order of diffusing valve 12, the electronic valve place feedback information that diffuses valve 12 is till valve wide open puts in place, to carry out next flow process again before it receives the outlet push-pull valve;
Time-delay: the evacuation time of on-the-spot test is a benchmark when debugging for the first time, adds 5 fens clock times program internal delay time time as programmable logic controller PLC or distributed control system DCS21 again;
Electronic intake valve 15 complete shut-downs of nitrogen purging 2#: the pass valve order of sending the electronic intake valve 15 of nitrogen purging 2# by programmable logic controller PLC or distributed control system DCS21, till the valve place feedback information that it receives the electronic intake valve 15 of nitrogen purging 2# puts in place for the valve complete shut-down, carry out next flow process again;
Electronic intake valve 14 complete shut-downs of nitrogen purging 1#: the pass valve order of sending the electronic intake valve 14 of nitrogen purging 1# by programmable logic controller PLC or distributed control system DCS21, till the valve place feedback information that it receives the electronic intake valve 14 of nitrogen purging 1# puts in place for the valve complete shut-down, carry out next flow process again;
Stator blade system 7 complete shut-downs of blast furnace gas energy recycle device: the pass stator blade order of sending the stator blade system 7 of blast furnace gas energy recycle device by programmable logic controller PLC or distributed control system DCS21, till the stator blade position feedback information that it receives the stator blade system 7 of blast furnace gas energy recycle device puts in place for the stator blade complete shut-down, carry out next flow process again;
Surge and cut valve 5 complete shut-downs soon: send the valve quick closing valve order of surging and cutting valve 5 soon by programmable logic controller PLC or distributed control system DCS21, receive till the valve place feedback information of cutting valve 5 soon of surging puts in place for the valve complete shut-down, carry out next flow process again up to it;
Electronic equalizing valve 6 complete shut-downs: the pass valve order of sending electronic equalizing valve 6 by programmable logic controller PLC or distributed control system DCS21, till the valve place feedback information that it receives electronic equalizing valve 6 puts in place for the valve complete shut-down, carry out next flow process again;
1# by-pass valve 3 complete shut-downs surge: the valve that is sent the 1# by-pass valve 3 that surges by programmable logic controller PLC or distributed control system DCS21 closes the valve order, till the valve place feedback information that it receives the 1# by-pass valve 3 that surges puts in place for the valve complete shut-down, carry out next flow process again;
2# by-pass valve 4 complete shut-downs surge: the valve that is sent the 2# by-pass valve 4 that surges by programmable logic controller PLC or distributed control system DCS21 closes the valve order, till the valve place feedback information that it receives the 2# by-pass valve 4 that surges puts in place for the valve complete shut-down, carry out next flow process again;
Electronic valve 11 complete shut-downs that diffuse behind the inlet push-pull valve: by programmable logic controller PLC or distributed control system DCS21 send inlet behind the push-pull valve electronic diffuse valve 11 open the valve order, the electronic valve place feedback information that diffuses valve 11 is till valve wide open puts in place, to carry out next flow process again after it receives the inlet push-pull valve;
So far, the automatic sweeping process of gas replaced with nitrogen in blast furnace gas energy recovery system pipe network finishes.
According to technique scheme, the contriver in the near future on certain blast furnace the automatic sweeping process to this gas replaced with nitrogen in blast furnace gas energy recovery system pipe network verify.Repeatedly test through the scene, this method is safe and reliable.Finished the automatic purging function of gas replaced with nitrogen in blast furnace gas energy recovery system pipe network.

Claims (1)

1. the automatic blowing method of a gas replaced with nitrogen in blast furnace gas energy recovery system pipe network, it is characterized in that, this method adopts programmable logic controller PLC or distributed control system DCS (21) that each unit that disposes in the blast furnace gas energy recovery system pipe network is controlled, and each cell position relation of configuration is as follows in the described blast furnace gas energy recovery system pipe network:
A) reducing valve group (22) is connected on the blast furnace gas pipeline from iron-smelting blast furnace, and reducing valve group (22) inlet end disposes first branch road, and the exit end of reducing valve group (22) disposes second branch road;
B) first branch road comprises: at the inlet end configuration inlet electric butterfly valve (1) and the inlet electronic push-pull valve (2) of reducing valve group (22), dispose the electronic valve (10) that diffuses before the inlet push-pull valve between inlet electric butterfly valve (1) and the inlet electronic push-pull valve (2), dispose the electronic valve (11) that diffuses behind the push-pull valve that enters the mouth on electronic push-pull valve (2) pipeline afterwards that enters the mouth;
C) second branch road comprises: at the exit end configuration outlet electric butterfly valve (9) and the outlet electronic push-pull valve (8) of reducing valve group (22), dispose between outlet electric butterfly valve (9) and the outlet electronic push-pull valve (8) and export the electronic valve (13) that diffuses behind the push-pull valve, export electronic push-pull valve (8) and dispose the preceding electronic valve (12) that diffuses of outlet push-pull valve afterwards respectively, the nitrogen purging first electronic intake valve (14), purge air channel motorized valve (16), and the blast furnace gas energy recycle device (23) that has stator blade system (7), blast furnace gas energy recycle device (23) is equipped with load (24);
D) the electronic push-pull valve (2) that enters the mouth is connected to an end of blast furnace gas energy recycle device (23) by the 1# by-pass valve (3) that surges of parallel connection, the 2# by-pass valve (4) that surges, and is communicated with the electronic push-pull valve of outlet (8);
E) the electronic push-pull valve (2) that enters the mouth is cut the other end that valve (5), electronic equalizing valve (6) are connected to blast furnace gas energy recycle device (23) soon by surging of parallel connection;
Wherein, the electronic intake valve of described nitrogen purging 1# (14) connects the electronic intake valve of nitrogen purging 2# (15), and described purging air channel motorized valve (16) is communicated with water seal overflow motorized valve (17), water seal water inlet motorized valve (18), water seal draining motorized valve (19) and air purge gas blower (20) respectively;
Above-mentioned inlet electric butterfly valve (1), electronic push-pull valve (2) enters the mouth, 1# by-pass valve (3) surges, 2# by-pass valve (4) surges, surge and cut valve (5) soon, electronic equalizing valve (6), the stator blade system (7) of blast furnace gas energy recycle device, export electronic push-pull valve (8), outlet electric butterfly valve (9), the electronic valve (10) that diffuses before the inlet push-pull valve, the electronic valve (11) that diffuses behind the inlet push-pull valve, the electronic valve (12) that diffuses before the outlet push-pull valve, the electronic valve (13) that diffuses behind the outlet push-pull valve, the electronic intake valve of nitrogen purging 1# (14), the electronic intake valve of nitrogen purging 2# (15), purge air channel motorized valve (16), water seal overflow motorized valve (17), water seal water inlet motorized valve (18), water seal draining motorized valve (19), air purge gas blower (20) inserts programmable logic controller PLC or distributed control system DCS (21) respectively;
Programmable logic controller PLC or distributed control system DCS (21) monitor and control each equipment in the pipe network one by one according to setting program, and carry out automatic sweeping process, and concrete sweeping process is as follows automatically:
Inlet electric butterfly valve (1) complete shut-down, electronic push-pull valve (2) complete shut-down and clamping enter the mouth, outlet electric butterfly valve (9) complete shut-down, export electronic push-pull valve (8) complete shut-down and clamping, surge and cut valve (5) complete shut-down soon, electronic equalizing valve (6) complete shut-down, 1# by-pass valve (3) complete shut-down surges, 2# by-pass valve (4) complete shut-down surges, stator blade system (7) complete shut-down of blast furnace gas energy recycle device, electronic valve (10) complete shut-down that diffuses before the inlet push-pull valve, electronic valve (11) complete shut-down that diffuses behind the inlet push-pull valve, electronic valve (12) complete shut-down that diffuses before the outlet push-pull valve, electronic valve (13) complete shut-down that diffuses behind the outlet push-pull valve, the electronic intake valve of nitrogen purging 1# (14) complete shut-down, the electronic intake valve of nitrogen purging 2# (15) complete shut-down, purge air channel motorized valve (16) complete shut-down, air purge gas blower (20) is stopped transport, water seal draining motorized valve (19) valve complete shut-down, water seal overflow motorized valve (17) standard-sized sheet, water seal water inlet motorized valve (18) standard-sized sheet, enter nitrogen replacement coal gas, electronic valve (12) standard-sized sheet that diffuses before the outlet push-pull valve, the electronic intake valve of nitrogen purging 1# (14) standard-sized sheet, the electronic intake valve of nitrogen purging 2# (15) standard-sized sheet, after time-delay, stator blade system (7) standard-sized sheet of blast furnace gas energy recycle device, electronic equalizing valve (6) standard-sized sheet, surge and cut valve (5) standard-sized sheet soon, 1# by-pass valve (3) standard-sized sheet surges, 2# by-pass valve (4) standard-sized sheet surges, electronic valve (11) standard-sized sheet that diffuses behind the inlet push-pull valve, electronic valve (12) complete shut-down that diffuses before the outlet push-pull valve, time-delay, the electronic intake valve of nitrogen purging 2# (15) complete shut-down, the electronic intake valve of nitrogen purging 1# (14) complete shut-down, stator blade system (7) complete shut-down of blast furnace gas energy recycle device surges and cuts valve (5) complete shut-down soon, electronic equalizing valve (6) complete shut-down, 1# by-pass valve (3) complete shut-down surges, 2# by-pass valve (4) complete shut-down that surges, electronic valve (11) complete shut-down that diffuses behind the inlet push-pull valve, the automatic sweeping process of nitrogen replacement coal gas finishes.
CN2010101341522A 2010-03-26 2010-03-26 Automatic sweeping method for gas replaced with nitrogen in blast furnace gas energy recovery system pipe network Active CN101792834B (en)

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WO2008037132A1 (en) * 2006-09-12 2008-04-03 Jiule Zhou A process for iron smelting in blast furnace using purified oxygen and coal gas and its device
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