CN101825878B - Viscose fiber waste gas treatment control system - Google Patents
Viscose fiber waste gas treatment control system Download PDFInfo
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- CN101825878B CN101825878B CN2010101399330A CN201010139933A CN101825878B CN 101825878 B CN101825878 B CN 101825878B CN 2010101399330 A CN2010101399330 A CN 2010101399330A CN 201010139933 A CN201010139933 A CN 201010139933A CN 101825878 B CN101825878 B CN 101825878B
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- 239000002912 waste gas Substances 0.000 title claims abstract description 37
- 229920000297 Rayon Polymers 0.000 title claims abstract description 20
- 239000000835 fiber Substances 0.000 title claims abstract description 17
- 238000001179 sorption measurement Methods 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 39
- 238000009833 condensation Methods 0.000 claims abstract description 28
- 230000005494 condensation Effects 0.000 claims abstract description 28
- 239000003513 alkali Substances 0.000 claims description 61
- 238000004140 cleaning Methods 0.000 claims description 43
- 238000010521 absorption reaction Methods 0.000 claims description 40
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 38
- 238000004821 distillation Methods 0.000 claims description 26
- 239000007789 gas Substances 0.000 claims description 19
- 229910052757 nitrogen Inorganic materials 0.000 claims description 18
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 9
- 229910052697 platinum Inorganic materials 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000005406 washing Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 abstract 2
- 230000008569 process Effects 0.000 description 27
- 238000005516 engineering process Methods 0.000 description 23
- 230000008859 change Effects 0.000 description 15
- 238000004891 communication Methods 0.000 description 12
- 238000012545 processing Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 101710178035 Chorismate synthase 2 Proteins 0.000 description 4
- 101710152694 Cysteine synthase 2 Proteins 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 208000011580 syndromic disease Diseases 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention discloses a viscose fiber waste gas treatment control system. A distributed control system and a programmable controller are combined together for control. The distributed control system is provided with a redundancy control module and an input and output module. The redundancy control module is connected with a redundancy switchboard. The input and output module is connected with a signal isolation and transmission device. The redundancy switchboard is connected with a field operation station. The signal isolation and transmission device is connected with an alkaline washing signal acquisition device, an adsorption signal acquisition device, a condensation signal acquisition device, an alkaline washing control switch, an adsorption control switch and a condensation control switch. A changeover switch is connected with the distributed control system and the programmable controller. The viscose fiber waste gas treatment control system is provided with a control program to realize the full-process automatic control of waste gas treatment. When the distributed control system is failed, automatic control can be conducted by the programmable controller through the changeover switch. The invention has the advantages of automatic control, high safety and reliability, simple installation, maintenance and operation, stable running, high recovery efficiency and the like.
Description
Technical field:
The present invention relates to a kind of viscose fiber waste gas treatment control system.
Background technology:
The waste gas that produces in the viscose rayon production contains H
2S and CS
2The poisonous dusty gas of stench.Adopt alkali cleaning-adsorption condensing PROCESS FOR TREATMENT viscose glue waste gas, main technique flow process: waste gas is through the alkali cleaning pre-service, in and H
2S; Remove H
2Waste gas behind the S gets into adsorption tank, utilizes CS
2Physical characteristics, absorption, desorb, condensing and recycling.CS2 is a volatility, inflammability, explosive extremely strong material; CS
2Meet heat, naked light, spark or the blast of friction easy firing, CS
2Can produce static charge and detonate, can not with electric charge or spark, flame contacts with high temperature.
The waste gas that adopts alkali cleaning-adsorption condensing method to handle in the viscose rayon production is the technology of comparative maturity, and this technology is with the H in the waste gas
2S and CS
2Reclaim fully.Yet the one, alkaline cleaning procedure is handled H
2S control is bad, handles the back segment activated charcoal that will cause not up to standard and loses efficacy, and influences adsorption efficiency; The 2nd, CS
2Inflammable and explosive, the adsorption condensing process operation is complicated.Therefore, the quality of control method and device directly influences the emission-control equipment security of operation of alkali cleaning-adsorption condensing method, stable and organic efficiency.
Original emission-control equipment control technology adopts and waits method to realize technology controlling and process manually, and mostly on-site signal is that the operating personnel scene patrols and examines according to the field instrument displayed record, the technology controlling and process complicated operation, and probability of failure is high; Have a strong impact on the recycling effect; Whole device operating cost is high; Have serious potential safety hazard, energy consumption is big; This technical method labour intensity is big, and operational danger is big, and human resources require and the management expectancy height, influence this technological commercial Application.In original control, technology blower fan and technology pump adopt directly and start, and energy consumption is high.In old technology, adopt the control angle valve in addition, and large-scale control angle valve leakiness rapid wear, installation, Operation and Maintenance difficulty, cost is high.
Summary of the invention:
The objective of the invention is to overcome the weak point of original control technology, a kind of monitoring record technological process in real time is provided, safety interlocking control is timely, and energy consumption is low, and labour intensity is low, again the viscose fiber waste gas treatment control system of easy operating, maintenance and management.Through shirtsleeve operation, stable control improves organic efficiency, reduces cost recovery, be reduced to accident occurrence probability and influence minimum, remarkable in economical benefits.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: this viscose fiber waste gas treatment control system; Comprise Distributed Control System (DCS), redundancy switch, operator station; It is characterized in that also being provided with Programmable Logic Controller, Signal Spacing conveyer, alkali cleaning signal picker, absorption signal picker, condensation signal picker, alkali cleaning CS, absorption CS, control condensation switch and switch; Distributed Control System (DCS) is connected with Programmable Logic Controller and combines and control; Distributed Control System (DCS) is provided with redundant control module and input/output module; Redundant control module is connected with redundancy switch, and input/output module is connected with the Signal Spacing conveyer, and redundancy switch is connected with operator station; The Signal Spacing conveyer all is connected with the control condensation switch with alkali cleaning signal picker, absorption signal picker, condensation signal picker, alkali cleaning CS, absorption CS; Switch all is connected with Programmable Logic Controller with Distributed Control System (DCS), and viscose fiber waste gas treatment control system is provided with control program, to signal with parameter be set scan; And scanning result constantly calculated and compare; Calculate and result relatively as the basis for estimation of system's operation or do monitoring record, thereby realize that alkali cleaning-adsorption condensing method handles the whole-course automation control that waste gas is produced, when Distributed Control System (DCS) is out of order, substitute Distributed Control System (DCS) by Programmable Logic Controller and control automatically through switch.
Signal Spacing conveyer according to the invention adopts isolated gate or relay.
Alkali cleaning CS according to the invention, absorption CS and control condensation switch adopt butterfly valve or frequency converter.
Alkali cleaning CS according to the invention comprises alkali cleaning fan switch, water intaking valve, alkali-feeding valve and goes out the alkali valve; The absorption CS comprises dirty gas fan switch, fresh fan switch, adsorption tank main valve, dirty air valve, fresh air-valve, nitrogen valve, steam valve, preceding distillation steam valve, back distillation steam valve, vent valve, evaporator draining valve and air heat valve, and the control condensation switch comprises cooling-water pump switch, air cooling valve and row's atmosphere T-valve.
Alkali cleaning signal picker according to the invention comprises alkaline bath thermometric platinum resistance thermometer sensor,, alkaline bath fluid level transmitter, alkali cleaning blower fan current transformer, alkali cleaning blower fan contactor and alkali surge-tank Pneumatic butterfly valve limit switch; The absorption signal picker comprises dirty gas blower fan current transformer, dirty gas blower fan contactor, fresh blower fan current transformer, fresh blower fan contactor, adsorption tank thermometric platinum resistance thermometer sensor,, adsorption tank pressure unit, adsorption tank main valve limit switch, dirty air valve limit switch, fresh air-valve limit switch, nitrogen valve limit switch, steam valve limit switch, preceding distillation steam valve limit switch, back distillation steam valve limit switch and vent valve limit switch, and the condensation signal picker comprises evaporator fluid level transmitter, condenser Inlet and outlet water thermometric platinum resistance thermometer sensor,, cooling-water pump contactor and carbon disulphide storage tank fluid level transmitter.
Control program according to the invention is installed in the Distributed Control System (DCS); Control program comprises that master routine initialization, signal scanning, the parameter of carrying out successively are provided with scanning, data computation, data comparison and auto-programming; Said signal scanning is gathered on-site signal; Said parameter is provided with scanning the technological parameter of operator station setting is gathered; Said data computation is changed and is calculated the data of gathering, and said data relatively compare the technological parameter of on-site signal and setting, and said auto-programming is according to setting the automatic operation control that technological parameter carries out alkali cleaning, absorption, condensing and recycling; Said auto-programming also is installed in the Programmable Logic Controller and as backup, when Distributed Control System (DCS) is out of order, substitutes Distributed Control System (DCS) by Programmable Logic Controller and carry out auto-programming.
Auto-programming according to the invention comprises that the program initialization carried out successively, absorption air inlet, related valve close, fill nitrogen, steam, release of pressure, drying, cooling and exhaust; Said program initialization comprises that CS, motor place automatic mode, and said CS is absorption CS and control condensation switch; Said absorption air inlet comprises that the adsorption tank pattern changes regeneration over to from absorption; Begin to rehearse air valve and close all the other absorption CSs is opened adsorption tank main valve, dirty air valve after CS feedback is correct, and timing also shows when the step; Timing to and do not make mistakes and change next step, produce the fault reason if make mistakes; Said related valve is closed and is comprised and close adsorption tank main valve, dirty air valve, and vent valve is closed in the correct back of CS feedback, and timing begins and shows when the step, timing to and do not make mistakes and change next step, produce fault and manage if make mistakes; The said nitrogen that fills comprises out evaporator draining valve, preceding distillation steam valve and back distillation steam valve; Open nitrogen valve after the CS feedback is correct; Timing is also worked as the step demonstration, and timing finishes pass, back evaporator draining valve, closes nitrogen valve; Timing to and nitrogen gas pressure be higher than setting value and do not make mistakes and change next step, produce the fault reason if make mistakes; Said steam comprises out steam valve, and the correct back timing of CS feedback begins and shows when the step, timing to and adsorption tank lower floor temperature be higher than setting value and do not make mistakes and change next step, produce fault and manage if make mistakes; Said release of pressure comprises the pass steam valve, starts fresh blower fan, and timing begins and shows when the step, timing to and do not make mistakes and change next step, produce fault and manage if make mistakes; Said drying comprises out the air heat valve; Distillation steam valve and back distillation steam valve before closing; Drive adsorption tank main valve, vent valve, fresh air-valve after the CS feedback is correct; Timing begins and shows when the step, timing to and fresh wind-warm syndrome degree be higher than settings and do not make mistakes and change next step, produce fault and manage if make mistakes; Said cooling comprises out air cooling valve; The air heat valve is closed in the correct back of CS feedback, and timing begins and shows when the step, and cooling back gas temperature is lower than settings and closes fresh blower fan; Timing to and the adsorption tank temperature be lower than setting value and do not make mistakes and change next step, produce the fault reason if make mistakes; Said exhaust comprises closes the adsorption tank main valve, and fresh air-valve is closed in the correct back of CS feedback, closes fresh blower fan; Close air cooling valve; Timing begins and shows when the step, timing to and the regeneration that do not make mistakes accomplish and get into the absorption air inlet of a new round, produce fault and manage if make mistakes.
The present invention has adopted current advanced person's DCS, the PLC modern control technology process control method in conjunction with the advanced person, has realized that alkali cleaning-adsorption condensing method handles the full-automation that waste gas is produced, and has guaranteed safe, the stable and organic efficiency of this treatment technology operation.
The present invention selects pneumatic control dish valve for use in the exhaust-gas treatment control device; The present invention has small investment, safe and reliable, characteristics such as installation and maintenance are simple to operate, stable and organic efficiency height, is applicable to the design of new factory and modernizes and expands the existing factory.
The present invention adopts frequency converter to realize the start and stop and the speed governing of technology blower fan and technology pump, control stabilization, and energy consumption is low, and power saving rate can reach more than 40%.
Description of drawings:
Fig. 1 is the control system block diagram of the embodiment of the invention.
Fig. 2 is the main program flow chart of the embodiment of the invention.
Fig. 3 is the communication flow figure of the embodiment of the invention.
Fig. 4 is that the operator station technology of the embodiment of the invention is provided with process flow diagram.
Fig. 5 is the auto-programming process flow diagram of the embodiment of the invention.
Butterfly valve when Fig. 6 is the absorbing process of the embodiment of the invention uses synoptic diagram.
Embodiment:
Referring to Fig. 1～Fig. 6, the present invention relates to a kind of viscose fiber waste gas treatment control system, in design, adopt decentralised control, centralized operation, differentiated control, flexible configuration, configuration to control thought easily.Control device mainly comprises Distributed Control System (DCS) DCS and Programmable Logic Controller PLC two parts, is main with Distributed Control System (DCS) DCS, and Programmable Logic Controller PLC is subsequent use.Distributed Control System (DCS) DCS is provided with the two cover redundant control module of being made up of power supply, CPU, communication module 20, two and overlaps the wire communication network of redundancy switch 21, two cover input/output modules 18 and connection usefulness; Adopt optical-fibre communications between the two cover redundant control module 20; Adopt optical-fibre communications between two redundancy switch 21, operator station 22 (redundant operation station, engineer station) or secondary switch also can be set according to actual needs below two redundancy switch 21.The embodiment of the invention also comprises Signal Spacing conveyer 17, alkali cleaning signal picker 1, absorption signal picker 3, condensation signal picker 5, alkali cleaning CS 2, absorption CS 4, control condensation switch 6 and switch 19; Distributed Control System (DCS) DCS is connected with Programmable Logic Controller PLC and combines and control; Distributed Control System (DCS) DCS is provided with redundant control module 20 and input/output module 18; Redundant control module 20 is connected with redundancy switch 21; Input/output module 18 is connected with Signal Spacing conveyer 17; Redundancy switch 21 is connected with operator station 22; Signal Spacing conveyer 17 all is connected with control condensation switch 6 with alkali cleaning signal picker 1, absorption signal picker 3, condensation signal picker 5, alkali cleaning CS 2, absorption CS 4; Switch 19 all is connected with Programmable Logic Controller PLC with Distributed Control System (DCS) DCS, and viscose fiber waste gas treatment control system is provided with control program, to signal with parameter be set scan; And scanning result constantly calculated and compare; Calculate and result relatively as the basis for estimation of system's operation or do monitoring record, thereby realize that alkali cleaning-adsorption condensing method handles the whole-course automation control that waste gas is produced, when Distributed Control System (DCS) DCS is out of order, substitute Distributed Control System (DCS) DCS by Programmable Logic Controller PLC and control automatically through switch 19.After control system is handled; Signal is by input/output module 18 outputs; Comprise alkali cleaning CS 2 (comprise alkali cleaning fan switch, water intaking valve, alkali-feeding valve, go out alkali valve etc.) through being used for the Signal Spacing conveyer 17 (normally isolated gate or relay) of signals security, arriving; Absorption CS 4 (comprising dirty gas fan switch, fresh fan switch, adsorption tank main valve 9, dirty air valve 7, fresh air-valve 8, nitrogen valve 10, steam valve 11, preceding distillation steam valve 12, vent valve 13, back distillation steam valve 14, evaporator draining valve and air heat valve etc.); Three big process section topworkies of control condensation switch 6 (comprising cooling-water pump switch, air cooling valve and row's atmosphere T-valve etc.) realize the waste gas purification processing, and critical piece all can adopt existing techniques in realizing.
The present invention realizes the full-automation control of exhaust-gas treatment through general DCS/PLC control system.Referring to Fig. 1, Fig. 6, contain H
2S and CS
2Waste gas handle through each process section such as alkali cleaning, absorption, condensation and realize CS
2Recovery.In this processing process; In the alkali washing process section, on-site signals such as alkaline bath temperature, alkaline bath liquid level, alkali cleaning blower fan electric current, alkali cleaning fan operation fault-signal, alkali surge-tank Pneumatic butterfly valve switching signal, alkali surge-tank liquid level are gathered through alkali cleaning signal picker 1 (comprising input instrument such as alkaline bath thermometric platinum resistance thermometer sensor,, alkaline bath fluid level transmitter, alkali cleaning blower fan current transformer, alkali cleaning blower fan contactor, alkali surge-tank Pneumatic butterfly valve limit switch); In the absorbing process section, on-site signals such as the switching signal of Pneumatic butterfly valves such as dirty gas blower fan electric current, dirty gas fan operation fault-signal, fresh blower fan electric current, fresh fan operation fault-signal, adsorption tank temperature, adsorption tank pressure, adsorption tank main valve 9, dirty air valve 7, fresh air-valve 8, nitrogen valve 10, steam valve 11, preceding distillation steam valve 12, vent valve 13, back distillation steam valve 14, steam sub-cylinder temperature are gathered through absorption signal picker 3 (the input instrument such as limit switch that comprise Pneumatic butterfly valves such as dirty gas blower fan current transformer, dirty gas blower fan contactor, fresh blower fan current transformer, fresh blower fan contactor, adsorption tank thermometric platinum resistance thermometer sensor,, adsorption tank pressure unit, adsorption tank main valve limit switch, dirty air valve limit switch, fresh air-valve limit switch, nitrogen valve limit switch, steam valve limit switch, preceding distillation steam valve limit switch, back distillation steam valve limit switch, vent valve limit switch); At the condensing and recycling process section, on-site signals such as evaporator liquid level, condenser Inlet and outlet water temperature, cooling-water pump operation troubles signal, CS2 storage tank liquid level are gathered through condensation signal picker 5 (comprising input instrument such as evaporator fluid level transmitter, condenser Inlet and outlet water thermometric platinum resistance thermometer sensor,, cooling-water pump contactor, carbon disulphide storage tank fluid level transmitter); Through being used for the Signal Spacing conveyer 17 of signals security, the input/output module of metering-in control system DCS/PLC.
Referring to Fig. 2～Fig. 4; The control program of the embodiment of the invention is installed in the Distributed Control System (DCS) DCS, and edits in advance according to concrete technological requirement, comprises that master routine initialization, signal scanning, parameter are provided with scanning, data computation, data comparison and auto-programming; Wherein after the master routine initialization; To signal with parameter be set scan, and scanning result is constantly calculated and compare, the basis for estimation that the result moves as auto-programming or make monitoring record.The communication of the embodiment of the invention is the tie that connects control device, process software and operator station operation screen; Comprise communication initialization, physical address scanning, data link, communications protocol, data transmission; Wherein behind the communication initialization; Predefined physical address is scanned, meet the data of setting up that the address is set and link, carry out data transmission according to communications protocol.The operator station technology setting of the embodiment of the invention is worked out according to concrete technology in advance; Comprise the initialization of technology picture, communication data scanning, technological process demonstration, technological parameter setting, technological operation and record, warning/form; Wherein after the initialization of technology picture; At first communication data is scanned; On picture, show each monitoring point dynamic change of technological process; Secondly through in picture, editing user oriented operation in advance: technological parameter and technological operation button etc. are set realize control whole emission-control equipment, and according to technological requirement, each function display operation record of utilization picture configuration software, monitoring point warning, data sheet etc.
The auto-programming that designs to the waste gas treatment process of maturation (adsorption condensing reclaims (CS2) program automatically) comprises each measuring control point such as liquid level, temperature, pressure etc. is uninterruptedly sampled and record; Alkali cleaning, absorption, condensing and recycling technological operation are controlled automatically; Process conditions interlock protection key equipment; PID regulates stabilization process condition, functions such as the automatic processing of abnormal occurrence.The technology picture that designs based on concrete technological process, picture is succinct, technological process is clear, and realizes real-time monitoring and intuitive operation to whole process flow through operator station.Said auto-programming also is installed in the Programmable Logic Controller PLC and as backup, when Distributed Control System (DCS) DCS is out of order, substitutes Distributed Control System (DCS) DCS by Programmable Logic Controller PLC and carry out auto-programming.
Referring to Fig. 5; Said auto-programming comprises that the program initialization carried out successively, absorption air inlet, related valve close, fill nitrogen, steam, release of pressure, drying, cooling and exhaust, and said program initialization comprises that CS (referring to adsorb CS 4, control condensation switch 6), motor place automatic mode; Said absorption air inlet comprises that the adsorption tank pattern changes regeneration over to from absorption; Begin to rehearse air valve 13 and close all the other absorption CSs 4 is opened adsorption tank main valve 9, dirty air valve 7 after CS feedback is correct, and timing also shows when the step; Timing to and do not make mistakes and change next step, produce the fault reason if make mistakes; Said related valve is closed and is comprised and close adsorption tank main valve 9, dirty air valve 7, and vent valve 13 is closed in the correct back of CS feedback, and timing begins and shows when the step, timing to and do not make mistakes and change next step, produce fault and manage if make mistakes; The said nitrogen that fills comprises out evaporator draining valve, preceding distillation steam valve 12 and back distillation steam valve 14; Open nitrogen valve 10 after the CS feedback is correct; Timing is also worked as the step demonstration, and timing finishes pass, back evaporator draining valve, closes nitrogen valve 10; Timing to and nitrogen gas pressure be higher than setting value and do not make mistakes and change next step, produce the fault reason if make mistakes; Said steam comprises out steam valve 11, and the correct back timing of CS feedback begins and shows when the step, timing to and adsorption tank 15 lower floor's temperature be higher than setting value and do not make mistakes and change next step, produce fault and manage if make mistakes; Said release of pressure comprises and closes steam valve 11, starts fresh blower fan, and timing begins and shows when the step, timing to and do not make mistakes and change next step, produce fault and manage if make mistakes; Said drying comprises out the air heat valve; Distillation steam valve 12 and back distillation steam valve 14 before closing; Drive adsorption tank main valve 9, vent valve 13, fresh air-valve 8 after the CS feedback is correct; Timing begins and shows when the step, timing to and fresh wind-warm syndrome degree be higher than settings and do not make mistakes and change next step, produce fault and manage if make mistakes; Said cooling comprises out air cooling valve; The air heat valve is closed in the correct back of CS feedback, and timing begins and shows when the step, and cooling back gas temperature is lower than settings and closes fresh blower fan; Timing to and adsorption tank 15 lower floor's temperature be lower than setting value and do not make mistakes and change next step, produce the fault reason if make mistakes; Said exhaust comprises closes adsorption tank main valve 9, and fresh air-valve 8 is closed in the correct back of CS feedback, closes fresh blower fan; Close air cooling valve; Timing begins and shows when the step, timing to and the regeneration that do not make mistakes accomplish and get into the absorption air inlet of a new round, produce fault and manage if make mistakes.
In this process, after scanning operator station setting value and on-the-spot each data of monitoring point; Uninterruptedly compare; When condition reaches setting value, (accomplish when the step), program judges and allows next step output function, if condition is not inconsistent (when the step does not accomplish or makes mistakes); Get into corresponding error handling processing, system alarm also is parked in when the artificial judgment processing of step wait; Compare and judgement output through program data acquisition constantly, the final whole technological operation that realizes recovery CS2, and reach technological requirement.
In the waste gas recycling and processing device; After receiving the control signal of DCS/PLC; Alkali cleaning CS 2, absorption CS 4 and control condensation switch 6 all adopt the corresponding command of general pneumatic control butterfly valve executive utility to realize the fast shut-off of each process section material supply such as alkali cleaning, absorption, condensation: in the alkali washing process section, the water intaking valve in the alkali allocation process, alkali-feeding valve, go out alkali valve etc.; In absorption, condensation process section; Referring to Fig. 6, what the dirty air valve 7 on the adsorption tank 15, fresh air-valve 8, adsorption tank main valve 9, nitrogen valve 10, steam valve 11, preceding distillation steam valve 12, vent valve 13, back distillation steam valve 14, evaporator draining valve and air heat valve all adopted is general butterfly valve.Waste gas after the wherein dirty air valve 7 control alkali cleanings gets into adsorption tank 15; Adsorption tank main valve 9 control waste gas and fresh air get into adsorption tank 15; Fresh air-valve 8 control fresh airs get into adsorption tank 15; Nitrogen valve 10 control nitrogen get into adsorption tank 15; Steam valve 11 control steam get into adsorption tank 15; Preceding distillation steam valve 12, back distillation steam valve 14 control steam and CS2 and mixed gas discharge adsorption tank 15; Waste gas after vent valve 13 controls purify is discharged adsorption tank 15.
Among the present invention, through the corresponding command each the technology blower fan of control of general frequency converter executive utility and the start and stop and the speed governing of technology pump.Take out waste gas from the exhaust gas source workshop like the alkali cleaning blower fan of alkali cleaning workshop section and get into emission-control equipment; The dirty gas blower fan of absorption and condensing and recycling workshop section is pumped waste gas from alkali cleaning workshop section and is got into adsorption tank 15, and fresh blower fan send fresh wind to advance adsorption tank 15 so that reclaim CS
2Use; The cooling-water pump of each process section etc.
More than be the practical implementation under the technical scheme framework of the present invention, the simple deformation or the combination of every embodiment of the invention technical scheme and technical characterictic all should be thought to fall into protection scope of the present invention.
Claims (6)
1. viscose fiber waste gas treatment control system; Comprise Distributed Control System (DCS), redundancy switch, operator station; It is characterized in that: also be provided with Programmable Logic Controller, Signal Spacing conveyer, alkali cleaning signal picker, absorption signal picker, condensation signal picker, alkali cleaning CS, absorption CS, control condensation switch and switch; Distributed Control System (DCS) is connected with Programmable Logic Controller and combines and control; Distributed Control System (DCS) is provided with redundant control module and input/output module; Redundant control module is connected with redundancy switch, and input/output module is connected with the Signal Spacing conveyer, and redundancy switch is connected with operator station; The Signal Spacing conveyer all is connected with the control condensation switch with alkali cleaning signal picker, absorption signal picker, condensation signal picker, alkali cleaning CS, absorption CS; Switch all is connected with Programmable Logic Controller with Distributed Control System (DCS), and viscose fiber waste gas treatment control system is provided with control program, to signal with parameter be set scan; And scanning result constantly calculated and compare; Calculate and result relatively as the basis for estimation of system's operation or do monitoring record, thereby realize that alkali cleaning-adsorption condensing method handles the whole-course automation control that waste gas is produced, when Distributed Control System (DCS) is out of order, substitute Distributed Control System (DCS) by Programmable Logic Controller and control automatically through switch.
2. viscose fiber waste gas treatment control system according to claim 1 is characterized in that: said Signal Spacing conveyer adopts isolated gate or relay.
3. viscose fiber waste gas treatment control system according to claim 1 is characterized in that: said alkali cleaning CS, absorption CS and control condensation switch adopt butterfly valve or frequency converter.
4. viscose fiber waste gas treatment control system according to claim 1; It is characterized in that: said alkali cleaning CS comprises alkali cleaning fan switch, water intaking valve, alkali-feeding valve and goes out the alkali valve; The absorption CS comprises dirty gas fan switch, fresh fan switch, adsorption tank main valve, dirty air valve, fresh air-valve, nitrogen valve, steam valve, preceding distillation steam valve, back distillation steam valve, vent valve, evaporator draining valve and air heat valve, and the control condensation switch comprises cooling-water pump switch, air cooling valve and row's atmosphere T-valve.
5. according to claim 1 or 4 described viscose fiber waste gas treatment control systems; It is characterized in that: said alkali cleaning signal picker comprises alkaline bath thermometric platinum resistance thermometer sensor,, alkaline bath fluid level transmitter, alkali cleaning blower fan current transformer, alkali cleaning blower fan contactor and alkali surge-tank Pneumatic butterfly valve limit switch; The absorption signal picker comprises dirty gas blower fan current transformer, dirty gas blower fan contactor, fresh blower fan current transformer, fresh blower fan contactor, adsorption tank thermometric platinum resistance thermometer sensor,, adsorption tank pressure unit, adsorption tank main valve limit switch, dirty air valve limit switch, fresh air-valve limit switch, nitrogen valve limit switch, steam valve limit switch, preceding distillation steam valve limit switch, back distillation steam valve limit switch and vent valve limit switch, and the condensation signal picker comprises evaporator fluid level transmitter, condenser Inlet and outlet water thermometric platinum resistance thermometer sensor,, cooling-water pump contactor and carbon disulphide storage tank fluid level transmitter.
6. according to the described viscose fiber waste gas treatment control system of the arbitrary claim of claim 1～4; It is characterized in that: said control program is installed in the Distributed Control System (DCS); Control program comprises that master routine initialization, signal scanning, the parameter of carrying out successively are provided with scanning, data computation, data comparison and auto-programming; Said signal scanning is gathered on-site signal; Said parameter is provided with scanning the technological parameter of operator station setting is gathered; Said data computation is changed and is calculated the data of gathering, and said data relatively compare the technological parameter of on-site signal and setting, and said auto-programming is according to setting the automatic operation control that technological parameter carries out alkali cleaning, absorption, condensing and recycling; Said auto-programming also is installed in the Programmable Logic Controller and as backup, when Distributed Control System (DCS) is out of order, substitutes Distributed Control System (DCS) by Programmable Logic Controller and carry out auto-programming.
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| CN109032064B (en) * | 2018-09-10 | 2024-02-27 | 江门市崖门新财富环保工业有限公司 | Online monitoring system for waste gas treatment facilities |
| CN117163924B (en) * | 2023-11-01 | 2024-01-02 | 汇舸(南通)环保设备有限公司 | Drainage control system of nitrogen generator |
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| JP3355280B2 (en) * | 1996-09-30 | 2002-12-09 | 株式会社デジタル | Display control system |
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| CN1810350A (en) * | 2005-01-28 | 2006-08-02 | 南京化纤股份有限公司 | Tail gas desulfurizing tanning extract process for viscose fiber production |
| CN101301558A (en) * | 2007-05-08 | 2008-11-12 | 北京云辰天环保科技有限公司 | Activated carbon fiber organic solvent recovery novel technique using nitrogen as desorption medium |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3355280B2 (en) * | 1996-09-30 | 2002-12-09 | 株式会社デジタル | Display control system |
| CN2533640Y (en) * | 2002-04-01 | 2003-01-29 | 广东杰特科技发展有限公司 | Pulse power supply distribution control device for large discharge plasma reactor |
| CN1810350A (en) * | 2005-01-28 | 2006-08-02 | 南京化纤股份有限公司 | Tail gas desulfurizing tanning extract process for viscose fiber production |
| CN101301558A (en) * | 2007-05-08 | 2008-11-12 | 北京云辰天环保科技有限公司 | Activated carbon fiber organic solvent recovery novel technique using nitrogen as desorption medium |
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