6AV6542-0AC15-2AX0

6AV6542-0AC15-2AX0

6AV6542-0AC15-2AX0

廈門仲鑫航自動化設(shè)備有限公司

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基于DCS的溫度監(jiān)控系統(tǒng)

1、概述

    工業(yè)循環(huán)水在軋鋼工業(yè)中占有非常重要的地位，其水溫的高低直接影響到加熱爐和軋機(jī)等設(shè)備的安全和使用壽命。為及時(shí)準(zhǔn)確的對循環(huán)水進(jìn)行監(jiān)控，萊鋼軋鋼廠中小型車間水處理采用浙大中控SUPCON JX—300X DCS控制系統(tǒng)。DCS控制系統(tǒng)把計(jì)算機(jī)、儀表和電控技術(shù)融合在一起，實(shí)現(xiàn)了數(shù)據(jù)自動采集、處理、工藝畫面顯示、參數(shù)超限報(bào)警、設(shè)備故障報(bào)警和報(bào)表打印等功能。并在此基礎(chǔ)上開發(fā)了針對循環(huán)水溫的溫度閉環(huán)控制。

2、系統(tǒng)介紹

    SUPCON JX—300XDCS采用高速工業(yè)以太網(wǎng)Scnet作為其過程控制網(wǎng)絡(luò)，系統(tǒng)由工程師站、操作站、控制站、過程控制單元等組成，配置靈活。根據(jù)水處理系統(tǒng)規(guī)模，水處理SUPCON DCS系統(tǒng)設(shè)計(jì)了1個(gè)控制站，1個(gè)操作站（通過設(shè)置安全級別可兼做工程師站），構(gòu)成兩級結(jié)構(gòu)�？刂普臼乾F(xiàn)場級，直接與現(xiàn)場設(shè)備交換數(shù)據(jù)，完成整個(gè)工業(yè)過程的實(shí)時(shí)監(jiān)控功能。操作站（兼工程師站）是監(jiān)督控制級，即可完成對系統(tǒng)的組態(tài)、又可實(shí)現(xiàn)對現(xiàn)場級檢測、控制、保護(hù)功能的管理。SUPCON JX—300X DCS系統(tǒng)的SCKey組態(tài)軟件是一個(gè)全面支持該系統(tǒng)各類控制方案的組態(tài)軟件平臺。 通過SCKey組態(tài)軟件可完成整個(gè)系統(tǒng)的控制站組態(tài)（系統(tǒng)I/O組態(tài)、控制方案組態(tài)等）、操作站組態(tài)（畫面設(shè)置、系統(tǒng)流程圖組態(tài)、系統(tǒng)報(bào)表組態(tài)等）。系統(tǒng)構(gòu)成如圖1所示。 

3、溫度監(jiān)控方案

3.1 方案設(shè)計(jì) 

    從生產(chǎn)熱線循環(huán)回來的工業(yè)水流入1#、2#吸水井散熱，并通過吸水井塔頂?shù)?#和2#風(fēng)機(jī)進(jìn)行降溫，然后在1#、2#吸水井底部共用一個(gè)出水管為下一個(gè)工序供水，水溫要求控制在30oC以下。本系統(tǒng)在吸水井出水管處安裝Cu50熱電阻對水溫檢測，把溫度信號T1送入DCS的處理器，經(jīng)過控制規(guī)律的運(yùn)算后給出控制信號，用以控制變頻器來改變電機(jī)的輸入電壓頻率，來改變電動機(jī)的轉(zhuǎn)速，帶動風(fēng)機(jī)降溫，從而構(gòu)成一個(gè)閉環(huán)的溫度控制系統(tǒng)。變頻器選用兩臺日本SANKEN（300KW）通用型變頻器，控制原理如圖2所示。

    根據(jù)循環(huán)水在吸水井底部熱交換的特點(diǎn)，對1#、2#吸水井兩臺風(fēng)機(jī)的電機(jī)進(jìn)行主/副控制，主/副電機(jī)依照不同的速度曲線驅(qū)動風(fēng)機(jī)運(yùn)轉(zhuǎn)。1#、2#電機(jī)可互為主/副電機(jī)選擇，極大方便了操作工的操作。

3.2 軟件實(shí)現(xiàn)

    為方便操作人員的操作，在操作站創(chuàng)建循環(huán)水溫度監(jiān)控畫面，可在線顯示循環(huán)水的溫度、變頻器的速度反饋、報(bào)警等，進(jìn)行1#、2#風(fēng)機(jī)電機(jī)的啟�？刂坪椭�/副選擇控制。并通過切換安全等級在線修改主/副電機(jī)控制回路中的溫度、轉(zhuǎn)速等控制參數(shù)。

    針對循環(huán)水溫度調(diào)節(jié)存在大滯后性的特點(diǎn)，對1#、2#風(fēng)機(jī)電機(jī)采用分段控制方法，主/副電機(jī)控制曲線如圖3所示：當(dāng)循環(huán)水溫度低于20oC時(shí)，主/副風(fēng)機(jī)電機(jī)變頻器的輸出電壓頻率均為20HZ。當(dāng)循環(huán)水溫度變高時(shí)，主控制回路中的變頻器的輸出電壓頻率跟隨增大，當(dāng)循環(huán)水溫度高于24oC時(shí)，主電機(jī)全工頻運(yùn)轉(zhuǎn)。副電機(jī)在循環(huán)水溫度升至23oC時(shí)，副控制回路增大副電機(jī)輸入電壓頻率，提高風(fēng)機(jī)轉(zhuǎn)速，當(dāng)循環(huán)水溫度高于28oC時(shí)，副電機(jī)全工頻運(yùn)轉(zhuǎn)，與主電機(jī)一起為循環(huán)水快速降溫。

4、應(yīng)用效果

    自循環(huán)水溫度監(jiān)控投運(yùn)以來，運(yùn)行穩(wěn)定、效果良好。在環(huán)境溫度較高的夏季可有效的把循環(huán)水溫度控制在30oC以下。達(dá)到了熱線生產(chǎn)要求。在春、秋、冬環(huán)境溫度較低的季節(jié)，風(fēng)機(jī)電機(jī)按控制曲線運(yùn)行，較增加控制功能前的風(fēng)機(jī)全工頻運(yùn)行降耗35%。

1784-U2CN

1784-U2DN

871A-TS5-N1

871A-TS5-NM1

MTJR1S00

HE300GEN200D

520422000

MA-0185-100（B）14DB TAP

NIB SCHNEIDER ELECTRIC ZB4-BK1233 SELECTOR SWITCH ZB4BK1233

ALLEN BRADLEY 875CP-AM30N34-A?2 PROXIMITY SWITCH NEW

NEW SCHNEIDER ELECTRIC ZB4-BK1333 SELECTOR SWITCH GRN

OMRON TL-W1R5MC1 PROXIMITY SWITCH 12 TO 24 DC

HONEYWELL 914CE20-3 MICRO SWITCH

NEW THOMAS PRODUCT MODEL 4400 LEVEL SWITCH 50 TO 240 V.A.C.

MICRO SWITCH BZE6-2RN194 LIMIT SWITCH USED BZE62RN194

LOT OF 3 ALLEN BRADLEY 800T-JX2 SELECTOR SWITCHES 800TJX2 SER. T

HONEYWELL MICRO SWITCH FE-LPK03C-2S 120VAC 50/60HZ FELPK03C2S

NIB SQUARE D 9013 GSG-2 PRESSURE SWITCH 9013GSG2 SERIES C

BURLING B-1C TEMPERATURE CONTROL SWITCH B1C

ALLEN BRADLEY 871TM-DH5NP18-D?4 SWITCH 871TMDH5NP18D4

NEW ALLEN BRADLEY 800T-N37 30.5MM POTENTIOMETER UNIT 800TN37 SERIES P

ALLEN BRADLEY 800EM-SM22 SELECTOR SWITCH 800EMSM22 NIB

NIB ALLEN BRADLEY 800T-QST24R PILOT LIGHT 24VAC/DC RED

OMRON E2E-X10E1 PROXIMITY SWITCH 12 TO 24 VDC NEW

HONEYWELL GKRA-40L6A2-F05 MICRO SWITCH GKRA-40L6A2, 24VDC

NIB ALLEN BRADLEY 800T-H4A SELECTOR SWITCH 2 POSITION BLACK 800TH4A SER. T

NIB HONEYWELL 3PA6 MICRO SWITCH

NEW ALLEN BRADLEY 800MR-JX9B SELECTOR SWITCH SER. A

CKD R3 REED SWITCH CYLINDER SENSOR DC5/24V

NIB HONEYWELL 1MN1 MICRO SWITCH

LOT OF 4 NEW SMC D-97 AUTO-SWITCHES D97

LOT OF 4 IDEC ABWN5X MOMENTARY PUSHBUTTONS NEW

RELAY AND CONTROL CORP. PUSHBUTTON STATION SS600 600V MAX W/ CARLON A-1758

ALLEN BRADLEY 800MS-DB16 OPERATOR FOR PUSHBUTTON SWITCH 800MSDB16 SER. A

LOT OF 4 SMC D-Y59B SOLID STATE SWITCH NEW 3 WIRE NPN 5-28VDC SOLID STATE

HONEYWELL BA-2R708-P7 MICRO SWITCH BA2R708P7 NIB

SQUARE D 9013 GSG-2 PRESSURE SWITCH 9013GSG2 SERIES C

NEW ADVANCE AUTOMATION COMPANY LS-10L-NO REED SWITCH LS-10L-N0, 24VAC DC 1/2A

NEW MAGNETROL TSF-2000-E00/4T?1-1220-002 THERMATEL DISPERSION FLOW/LEVEL SWITCH

NEW ROBOHAND RMS22CP PROXIMITY SWITCH

NEW OMRON E2E-X10E1 PROXIMITY SWITCH E2EX10E1

OMRON E2E-X5E1-M1 PROXIMITY SWITCH E2EX5E1M1

OMRON E2EY-X4C1 PROXIMITY SWITCH E2E-Y-X4C1 E2EYX4C1

MICRO SWITCH FYCA8C3-2 PROXIMITY SWITCH 120VAC 50/60HZ 1.2AMP FYCA8C32

ALLEN BRADLEY ROLLER LEVER 802T-W1F 3/4" DIA 1/4" WIDTH NEW

NIB HONEYWELL 3PA1 MICRO SWITCH

NEW CKD MOV REED SWITCH 100VAC 12-24VDC

NEW PHD 67904-1-05 SOLID STATE SWITCH DC SERIES 5M LEAD

LOT OF 3 ALLEN BRADLEY 800T-HX2 SELECTOR SWITCHES 800THX2 SER. T

NIB SQUARE D 9001KS53K5 SELECTOR SWITCH OPERATOR 3POS 30MM KEYED SPG RET

NIB SQUARE D 9999SB9 POWER POLE ADDER SER. A

NIB ALLEN BRADLEY 800MR-HX2B SELECTOR SWITCH

OMRON E3F2-DS10C4-M PHOTOELECTRIC SWITCH NEW

NEW MICROSWITCH 11CX12-9840 EXPLOSION PROOF SNAP SWITCH 11CX12

5 NEW ALLEN BRADLEY 800EM-PL1 OPTIC PILOT LIGHT

NIB ALLEN BRADLEY 800T-FX9A5 PUSH BUTTON SER. T 2 POSITION PUSH-PULL YELLOW CAP

SORENSON PTM 24-2.4 DC POWER SUPPLY

TOWER ELECTRONICS VIDEOJET 1000460 POWER SUPPLY 206998

MICRON DINergy MD120-24-1 POWER SUPPLY MD120241

GENERAL ELECTRIC CR305B0 CONTACTOR CR305B002 NIB

SHINDENGEN EY05005U POWER SUPPLY 100-120VAC 5VDC 5AMP

LAMBDA LVS-42-24-B POWER SUPPLY LVS4224B

NIB REDLION CONTROLS APSIS000 ACCESSORY POWER SUPPLY CURRENT SOURCE MODEL APSIS

SATO PR7730100 POWER SUPPLY SET 115V NIB

NIB CARLO GAVAZZI SPD241201 SWITCHING POWER SUPPLY 115/230VAC 47-63Hz 24VDC 5A

DIGITAL EQUIPMENT H780-A POWER SUPPLY 50/60HZ 230W 120V 5A

OMRON S82S-0324 POWER SUPPLY S82S0324

GENERAL ELECTRIC EP101UCC02 1P 2AMP 230/400VAC CIRCUIT BREAKER 673303 NIB

SOLA 81-12-215-02 POWER SUPPLY 811221502 INPUT: 47-63HZ W/ F6-11201-O/A PC BOARD

NIB COSEL R25U-24 R/RR SERIES POWER SUPPLY

OMRON S82G-1524 POWER SUPPLY

NEMIC-LAMBDA LWT15H-522 POWER SUPPLY

NIB COSEL K25AU-12 SWITCHING POWER SUPPLY 2.1AMP 12VDC 25.2W K25AU12

SIEMENS 6EP1437-3BA00 POWER SUPPLY SITOP POWER 40 6EP14373BA00

FENNER 7300-0136 POWER SUPPLY / ISOLATOR PN7300-0136

GE EP61ULC04 1-POLE MINI CIRCUIT BREAKER BOX OF 12 NEW

SOLA S2350 HEVI-DUTY POWER SUPPLY

SICK PS51-1000 POWER SUPPLY 7022834

LAMBDA LNS-Z-12 REGULATED POWER SUPPLY LNSZ12

GE EP62ULC06 2 POLE MINI CIRCUIT BREAKER BOX OF 6 NEW

COSEL R25U-24 POWER SUPPLY 100-120VAC 0.70AMP 50/60HZ R25U24

NEW HALMAR POWER CONTROLLER LZF1-4840 VOLTS: 480 AMPS: 40

HALMAR POWER CONTROLLER

LAMBDA LVT-40-144-B POWER SUPPLY 26W, LVT40144B

LOT OF 2 NEW FUJI ELECTRIC CP31D CIRCUIT BREAKERS 3A, DC 50V

SINUDYN SIEB & MEYER 26.44.25 BRUSHLESS MOTOR-SYSTEM POWER SUPPLY MODULE 264425

NEW ALLEN BRADLEY 1771-CM CHASSIS CABLE P1 POWER SUPPLY

NIB NEMIC-LAMBDA LWT15H-522 POWER SUPPLY

NIB STANCOR STA-3560 WALL PLUG-IN POWER SOURCE STA3560

GENERAL ELECTRIC CR306C002 STARTER SIZE 1 NIB

BARBER COLMAN SOLID STATE CONTACTOR CB11-02480-055-?3-00 SSC 480V 55A 55C

SPERRY UNIVAC 01P1500-001 F POWER SUPPLY 114VOLTS

ALLEN BRADLEY 1492-CB1DG100 10A CIRCUIT BREAKER NIB

TELEMECANIQUE GV2-M06 MOTOR STARTER PROTECTOR GV2M06 1-1.6AMP

FUJI ELECTRIC CP32FM/1 CIRCUIT PROTECTOR 2POLE 1A CP32FM1, CP32FM

TELEMECANIQUE GV2-M02 MOTOR CIRCUIT BREAKER GV2M02 NIB

SQUARE D MG24425 CIRCUIT BREAKER 34614 1P 1A 277VAC NIB

FUJI CP31FM/3 CIRCUIT PROTECTOR CP31FM 3 AMP BREAKER

SQUARE D FAL36035 35A CIRCUIT BREAKER FAL36035 W/9422RN1 OPERATING MECHANISM

NEMIC-LAMBDA RS-9-24 POWER SUPPLY RS924

FUJI SA33CM 3 POLE 2.6 A CIRCUIT BREAKER SA33CM/2.6 NIB

TELEMECANIQUE GV2-M03 MOTOR CIRCUIT BREAKER GV2M03 NIB

NIB SQUARE D MG24505 SUPPLEMENTARY PROTECTOR 277V 8AMP

FUJI CP31FM/1 CIRCUIT PROTECTOR CP31FM 1 AMP BREAKER

SINUDYN SIEB & MEYER 26.44.0007.4 BRUSHLESS MOTOR SYSTEM 26.44.0016.2 TYPE: M

NIB SQUARE D QO170 CIRCUIT BREAKER WITH VISI-TRIP INDICATOR 1P 70AMPS

NEW ABB S201-K2 CIRCUIT BREAKER 2AMP 1POLE 480Y/277VAC

SIEMENS 5SX23 CIRCUIT BREAKER

NEW SQUARE D FAL36035 35A CIRCUIT BREAKER FAL36035

AIRPAX UPL1-1REC2-3222?-4 CIRCUIT BREAKER 65241-54D NEW

NIB SQUARE D QOB150 CIRCUIT BREAKER WITH VISI-TRIP INDICATOR 1P 50AMPS

SQUARE D MG26925 CIRCUIT BREAKER 89217 C60N NIB

TELEMECANIQUE GV2-M06 MOTOR CIRCUIT BREAKER GV2M06 NIB

SIEMENS Q220 CIRCUIT BREAKER

FUJI CP33FS/7 CIRCUIT PROTECTOR 7AMP 3POLE

LOT OF 5 MERLIN GERIN 60101 CIRCUIT BREAKERS C1A, 240V, MULTI 9 C60

FUJI CP31FM/2 CIRCUIT PROTECTOR CP31FM 2 AMP BREAKER

LOT OF 3 MERLIN GERIN 24399 CIRCUIT BREAKER C60N 6 AMP TYPE C 230/400V

TELEMECANIQUE GV2-M05 MOTOR CIRCUIT BREAKER GV2M05 NIB

ALLEN BRADLEY 50403 DRIVER BOARD FOR 30/40/50 HP

SQUARE D MERLIN GERIN 60121 20990 C60N CIRCUIT BREAKER

SQUARE D MERLIN GERIN 60101 40967 C60N CIRCUIT BREAKER

SIEMENS 3TF3000-0B CONTACTOR 20AMP NON REVERSING

ABB S202U-K20 CIRCUIT BREAKER 20AMP 2POLE K 240 BPCD S202UK20

RELIANCE ELEC. 65241-54D CIRCUIT BREAKER 6524154D NIB

FUJI CP31FM/10 CIRCUIT PROTECTOR CP31FM 10 AMP BREAKER

FUJI CP31FM/10 CIRCUIT PROTECTOR CP31FM 10 AMP BREAKER

AUTOMATIONDIREC?T G3P 22K CIRCUIT BREAKER G3P-060 60AMP

FUJI ELECTRIC EA53AC AUTO BREAKER 30AMP, EA53AC

ALLEN BRADLEY 1492-CB2-G200 SER. C CIRCUIT BREAKER 20A 5HP 1492CB2G200

ALLEN BRADLEY 1492-CB1 G200 CIRCUIT BREAKER 1492CB1G200

ALLEN BRADLEY 1492-GH012 SER. B BREAKER 1492GH012 NEW

ALLEN BRADLEY 1492-CB-2-G-070 BREAKER 1492CB2G070

NIB ALLEN BRADLEY 1492-CB2G070 MANUAL MOTOR CONTROLLER 7AMPS, SER. C

NIB ALLEN BRADLEY 1492-CB1H070 CIRCUIT BREAKER SER. B

LOT OF 6 ALLEN BRADLEY 1492-CB1 CIRCUIT BREAKERS 1492CB1

WESTINGHOUSE EHD3020L CIRCUIT BREAKER STYLE NO. 6638C94G85

NEW OSBORNE 120356-0100-053 CONTROL TRANSFORMER CAT. NO: 50-0100-053-OT

ALLEN BRADLEY 1492-CB2F050 CIRCUIT BREAKER SERIES C 1492CB2F050

NEW BUSS LPJ-50SP 600V 300VDC FUSE LPJ50SP

TCI LINE REACTOR KLR16ATB KLR SERIES TRANSFORMER 3PHASE REACTOR NEW

SIEMENS EFEN 63A AMP USED

NIB RAM METER SFT-750 CURRENT TRANSFORMER SFT750

LOT OF 4 BUSSMANN FUSETRON FRN-R-10 FUSES CLASS RK5 250V 10AMP, FRNR10

NEW OSBORNE 120356-0500-053 CONTROL TRANSFORMER CAT. NO: 50-0500-053-OT

NIB ACME PL-79906 FUSE KIT PL79906

LOT OF 2 RAM METER 58 RBL-600 CURRENT TRANSFORMER 58RBL600

NEW OSBORNE 120356-1000-053 TRANSFORMER CAT. NO: 50-1000-053-OT SINGLE PHASE

NEW OSBORNE 120356-3000-053 TRANSFORMER CAT. NO: 50-3000-053-OT SINGLE PHASE

BUSS FUSE HOLDER JTN60060 35-60A 600VAC JTN60060 WITH FUSE LPJ-50SP

LOT OF 20 BUSSMANN FUSETRON FRN-R-10 FUSES CLASS RK5 250V 10AMP, FRNR10

NIB BUSSMANN KAB-300 TRON RECTIFIER FUSE KAB300

BUSSMANN NON175 FUSE ONE-TIME 175AMP 250VOLT NON 175 NON-175 NIB

LOT OF 2 NIB BUSSMANN NON175 FUSE ONE-TIME 175AMP 250VOLT NON 175