CN201145850Y - Automatic operation system for delayed coking coke chamber - Google Patents
Automatic operation system for delayed coking coke chamber Download PDFInfo
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- CN201145850Y CN201145850Y CNU200720085318XU CN200720085318U CN201145850Y CN 201145850 Y CN201145850 Y CN 201145850Y CN U200720085318X U CNU200720085318X U CN U200720085318XU CN 200720085318 U CN200720085318 U CN 200720085318U CN 201145850 Y CN201145850 Y CN 201145850Y
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Abstract
The utility model relates to a delayed coking coke tower automatic operation system, belonging to the technical filed of a delayed coking coke tower and mainly solves the problems of spot manual operation and being difficult to ensure operation accuracy owning to a hand valve adopted for the operation of the domestic delayed coking device coke tower operation at present. The automatic operation system is characterized in that: oil, gas, cooling coke water, steam and quench oil process pipelines are provided with an electric valve and an air operated valve; the system comprises a PLC part which consists of a CPU, a power supply, an input and output module, a communication module and a decryption dog; an isolating circuit which consists of a safety isolating gate and a relay; a man-machine interface part which consists of an upper machine and a displaying screen; an operating board which consists of a data displaying screen, a determine key and a reset key; a detection part which consists of a pressure sensor, a temperature sensor, a flow sensor and a liquid level sensor. The automatic operation system is characterized by automatically and logically controlling and interlocking each technological process valve and replacing manual operation, and is mainly applied in the automatic operation system of the delayed coking device coke tower.
Description
Technical field:
The utility model belongs to delayed coking coke drum technical field.Be specifically related to a kind of logic control of delayed coking unit coke drum operation in the petroleum chemical industry and automatic operation system of interlocking of being applied in.
Background technology:
As everyone knows, the delayed coking technology can be converted into light-end products to refinery residual oil, pitch and sump oil the heaviest or the most inferior, and its secondary product coking dry gas and coke also are the good raw materials of other process unit.Because the delay coking process process is because technology maturation, adaptability to raw material is strong, product flexibility is big, operational reliability is high, investment and operation cost are relatively low, delayed coking is popularized at present at home, is one of main technology of oil-refining chemical factory residual oil processing.
Coke drum is the equipment of intermittently operated, adopts two coke drum alternate operations in the single series delayed coking unit, and when a tower during in charging, another tower is handled carrying out coke drum.The operation of coke drum production operation mainly contains: 1. steam out on a small quantity in coke drum, oil gas is blown into fractionator; 2. steam out in a large number in coke drum, this steams out and is stripped to the emptying tower that steams out, and reclaims sump oil in blowdown system condensation cooling; 3. feedwater on a small quantity in coke drum, the steam of feed-water flashing and oil gas are to the emptying tower; 4. feedwater in a large number in coke drum, water overflows to the hot-water cylinder of coke cooling water system; 5. discharge the interior water of coke drum to the coke cooling water hot-water cylinder; 6. dismantle coke outlet flange at the bottom of cat head, the tower; 7. adopt the coke in the water under high pressure excision coke drum; 8. cat head, tower bottom flange are installed; 9. the STRENGTH ON COKE tower carries out the sealing that cat head, bottom are checked in the gas pressure testing; 10. the oil gas that draws another coke drum is to this tower preheating, and oil gas turns back to fractionator through getting rid of oil tank again at the bottom of tower is introduced into tower.After the temperature for the treatment of coke drum reaches requirement, switch four-way valve, the normal charging of this valve, another tower carries out the processing of said process.
According to the design document and the working specification thereof of present domestic delayed coking unit, the coke drum operating post only is provided with two outer behaviour workmans, and said process is the operator manually according to the step execute-in-place, even the accuracy of dependence experience to guarantee to operate.
The existing problems of coke drum operation at present:
1) the maloperation meeting causes security incident.The operating feature of coke drum is that operated valve quantity is big, and often, and operated valve will take into account the operating conditions at other each positions in the device simultaneously, because the coke drum work accident that artificial maloperation causes happens occasionally.
2) the operating post labor strength is big.The coke drum framework of domestic delayed coking unit is general high about 50 meters, the multilayer platform is set, finish an operating cycle, needing the operator to carry operation tool repeatedly comes and goes up and down at the coke drum framework, the valve quantity of switch and adjusting is big, often, and the running time anxiety, the labour intensity that the workman bears is huge.
3) still there are potentiality in the optimization utilization in coke drum space.For guaranteeing that the operator has the sufficient time to carry out coking operation, often after coke drum operation one-period finishes, generally leave enough spaces, in order to avoid because running time deficiency or equipment failure cause coke drum towards tower; Particularly often can only adjust machining load by rule of thumb when appliance arrangement breaks down, lack comparatively accurately processing scheme, be that the optimization utilization in coke drum space can not get performance.
4) management level fall behind.In the actual production of present domestic delayed coking unit coke drum, on-the-spot operation does not have detailed record, when operating at the scene, the measurement instrument signal in the device can't see, can only get in touch with by intercom between the operative employee,, be easy to occur operating change hysteresis or operate adjustment phenomenon not in place because the change flow process is frequent, gently then cause the operation fluctuation, heavy then bring out work accident, analyzing reason mostly is because unclear, the inside and outside behaviour of responsibility links up, and causes the production management of device comparatively chaotic.
Summary of the invention:
The utility model purpose provides a kind of coke drum handling safety of guaranteeing at above-mentioned weak point exactly, avoid accident to take place, reduce operator's labour intensity, improve the coke drum utilization factor, shorten the green coke cycle, improve the coker processing power, increase economic benefit, the delayed coking coke drum automatic operation system that raises the management level.
Technical solution of the present utility model is: a kind of delayed coking coke drum automatic operation system is characterized in that: constitute by man-machine interface part, PLC part, buffer circuit, topworks, operation board and test section, wherein,
1. man-machine interface partly comprises host computer and liquid crystal (touch) display screen, and host computer partly adopts the communication of MPI mouth to be connected with PLC, and liquid crystal (touch) display screen partly adopts the DP-PRUFIBUS communication to be connected with PLC;
2. the PLC input, output modular converter, communication module and the deciphering dog that partly comprise CPU, power supply, be connected with CPU;
3. buffer circuit is made of safety isolated gate, relay;
4. topworks comprises coker carbon Tower System crude oil pipeline, oil-gas pipeline, the coke cooling water line, steamline, the motorized valve of band information transmitter on the quench oil line, pneumatic valve, wherein, the motorized valve of belt switch digital signal information transmitter, pneumatic valve information transmitter end is connected with the input modular converter, the motorized valve of band analog quantity information transmitter, pneumatic valve information transmitter end is connected with the input modular converter through the safety isolated gate, the motorized valve of belt switch digital signal information transmitter, the pneumatic valve steady arm is connected with the output modular converter through relay, the motorized valve of band analog quantity information transmitter, the pneumatic valve electrical header is connected with the output modular converter through the safety isolated gate;
5. operation board comprises data display screen and definite, reset key, and data display screen is connected with the output modular converter, and definite, reset key is connected with the input modular converter;
6. the test section comprises pressure transducer, the temperature sensor that is arranged in the tower, and the flow sensor on quench oil line, steamline, coke cooling water line, the crude oil pipeline gets rid of the liquid level sensor in the oil tank; This pressure transducer, temperature sensor, flow sensor, liquid level sensor are connected with the input modular converter through the safety isolated gate.
Be equipped with hand switch mechanism on the motorized valve of band information transmitter, the pneumatic valve on crude oil pipeline described in the utility model technical solution, oil-gas pipeline, coke cooling water line, steamline, the quench oil line.
Man-machine interface part described in the utility model technical solution, PLC part, buffer circuit, topworks, test section are respectively:
1. in the man-machine interface part, employing is fitted with the microcomputer and the touch display screen of 512 exploitation version configuration softwares of INTOUCH9.0 and STEP7 V5.3 programming software, microcomputer partly adopts the communication of MPI mouth to be connected with PLC, and touch display screen partly adopts the DP-PROFIBUS communication to be connected with PLC;
2. in the PLC part, adopt CPU, adopt power supply, adopts 78 AI load modules, 3 16 DI load modules, adopt 74 AO output modules, 3 16 DO output modules, adopt communication module, adopt and decipher dog;
3. in the buffer circuit, between on-site signal that valve information transmitter, flow detection, Level Detection, tower internal pressure detect and thermocouple signal and 8 AI load modules, adopt safe isolated gate buffer circuit, the safe isolated gate buffer circuit of employing between 4 AO output modules of PLC output and valve positioner; Between valve Hui Xun and 16 DI load modules, adopt the relay buffer circuit, between 16 DO output modules of PLC output and valve positioner, adopt the relay buffer circuit;
4. in the topworks, comprise coker carbon Tower System crude oil pipeline, oil-gas pipeline, the coke cooling water line, steamline, the motorized valve of band information transmitter on the quench oil line, pneumatic valve, wherein, the motorized valve information transmitter end of belt switch digital signal information transmitter is connected with 16 DI load modules through the relay buffer circuit, the motorized valve of band analog quantity information transmitter, pneumatic valve information transmitter end is through safety isolated gate buffer circuit and 8 AI load modules) be connected, the motorized valve steady arm of belt switch digital signal information transmitter is connected with 16 DO output modules through the relay buffer circuit, the motorized valve of band analog quantity information transmitter, the pneumatic valve steady arm is connected with 4 AO output modules through safety isolated gate buffer circuit;
5. operation board comprises data presentation lamp and definite, reset key, and the data presentation lamp is connected with the DO output module, and definite, reset key is connected with the DI load module;
6. in the test section, pressure transducer, temperature sensor, quench oil line, steamline, the cold flow sensor (FT1-FT8) that waters on waterline, the crude oil pipeline in the tower, the liquid level sensor that gets rid of in the oil tank is connected with 8 AI load modules through safety isolated gate buffer circuit.
The utility model is because with coker carbon Tower System crude oil pipeline, oil-gas pipeline, the coke cooling water line, steamline, hand valve changes the motorized valve of band information transmitter on the quench oil line, pneumatic valve, and do not change the position at former hand valve place, and employing comprises CPU, power supply, the input that is connected with CPU, output module, the PLC part that communication module and deciphering dog are formed, by the safety isolated gate, the buffer circuit that relay constitutes, the man-machine interface part that constitutes by host computer and liquid crystal touch screen, by data display screen and definite, the operation board that reset key constitutes, by the pressure transducer that is arranged in the tower, temperature sensor, the quench oil line, steamline, the coke cooling water line, flow sensor on the crude oil pipeline, get rid of the test section that the liquid level sensor in the oil tank constitutes, thereby can pass through pressure, temperature, flow, time, instrument signals such as valve opening carry out automatic logic control and interlocking to each valve, air is caught up with in exchange, pressure testing, pressure release, draw oil gas, set up the oil gas circulation, switch and produce, for a short time steam out, steam out greatly, little feedwater, big feedwater, change overflow, bubble is burnt, discharge water and pay the automatic interlock control of 14 operations of decoking, to realize the automation mechanized operation of coke drum, replace original manually-operated.
The petrochemical industry process units is all constantly accumulated experience in production run, improve production level and economic benefit, the technology controlling and process scheme of the operation automatic interlock control of above coke drum, according to present domestic delayed coking unit technological design and instrument controlling level, under engineering specifications, be feasible, it has not only avoided loaded down with trivial details manually-operated, reduces working strength of workers; Effectively shortened the operating cycle of coke drum, tap the production potential is increased economic efficiency; Raise the management level; More the safety in production of coke drum provides safeguard, and prevents because the accident that maloperation causes is stopped work coker, even influences the operation of full factory.Domestic delayed coking unit automatic control level will more step to a new level.
The utlity model has following characteristics:
1, guarantees the coke drum handling safety, avoid accident to take place.The Overall Steps of coke drum operation adopts logic control, the per pass operation all needs the signal of each measurement point just can carry out under the state of logic regulation, otherwise will point out warning message, and the operation of key also is provided with the link that outer behaviour scene is confirmed and interior actuating work is confirmed, the accident of avoiding artificial maloperation to cause.
2, reduce operator's labour intensity.There is the manually operated valve of the workman of needs to adopt control automatically, replaces manually-operated, avoid repeatedly coke drum framework and operate the work of a large amount of valves up and down of workman, reduce workman's working load in a large number.
3, improve the coke drum utilization factor, shorten the green coke cycle, improve the coker processing power, increase economic benefit.Shortening the green coke cycle is the effective way that improves the coker treatment capacity; the domestic green coke cycle is generally at 40 ~ 48 hours; the coke drum running time is long to be the bottleneck that shortens the green coke cycle; running time after valve is controlled automatically will obviously reduce; for the switching of finishing coke drum in short period is more given security, thereby improve the device processing power, simultaneously under the protection of coke drum material level interlocking; can reduce the outage behind the coke drum green coke, improve the utilization factor of coke drum.
4, raise the management level.Each operation steps and action, all can be presented at intuitively on the screen, and each operational circumstances there is detailed record, for the analysis of causes of installing abnormal conditions provides true and reliable original certificate, also help simultaneously the examination of supvr to employee's ability to work and attitude, the more important thing is when device production is broken down, it can accurately provide corresponding solution or adjustment scheme according to the collection and the calculating of data in the past, both helped the quick eliminating of production fault, also can avoid the secondary accident that causes because of operational processes is improper, improve the management level of producing greatly.
The utility model is mainly used in the logic control of delayed coking unit coke drum operation in the petroleum chemical industry and the automatic operation system of interlocking.
Description of drawings:
Fig. 1 is the utility model embodiment PLC arrangement plan;
Fig. 2 is the utility model embodiment instrument process flow diagram;
Fig. 3 is the utility model Embodiment C-1, C-2 tower operational flowchart;
Fig. 4 is part 1 circuit diagram of the utility model embodiment;
Fig. 5 is part 2 circuit diagrams of the utility model embodiment;
Fig. 6 is part 3 circuit diagrams of the utility model embodiment;
Fig. 7 is part 4 circuit diagrams of the utility model embodiment;
Fig. 8 is part 5 circuit diagrams of the utility model embodiment;
Fig. 9 is part 6 circuit diagrams of the utility model embodiment.
Embodiment:
Concrete detailed description such as Fig. 1 to " stove two towers " single series delayed coking unit embodiment are extremely shown in Figure 9.
For " stove two towers " single series delayed coking unit, realize that the automatic interlock control of coke drum operation need be provided with following variable valve:
| Purposes | Quantity | Item | Remarks |
| Four-way valve | 1 | SV | High-temperature ball valve, distribution moves topworks, and instrument signal is an analog quantity |
| Charging stop valve at the bottom of the coke drum | 2 | BV-1，2 | High-temperature ball valve, distribution moves topworks, and instrument signal is a switching value |
| Big oil gas thread ball valve | 3 | VV-1，2， 3 | High-temperature ball valve and ring valve, distribution moves topworks, and instrument signal is an analog quantity |
| Operate total stop valve at the bottom of the coke drum | 2 | BV-3，4 | High-temperature ball valve, distribution moves topworks, and instrument signal is a switching value |
| Get rid of oily shutdown valve | 2 | ZV-1，2 | Variable valve, topworks is moved in distribution |
| The emptying variable valve steams out | 2 | ZV-3，4 | Variable valve, topworks is moved in distribution |
| Cold focal switch steams out | 2 | ZV-5，6 | Variable valve, topworks is moved in distribution |
| Water drain valve | 2 | ZV-7，8 | Variable valve, topworks is moved in distribution |
| Vacuum pressure valve | 2 | ZV-9，10 | Variable valve, topworks is moved in distribution |
| Purge and steam injection valve | 2 | ZV-11， 12 | Variable valve, topworks is moved in distribution |
| The quench oil fillup valve | 2 | FV-1，2 | Variable valve, topworks is moved in distribution |
| For a short time variable valve steams out | 1 | FV-3 | Variable valve, topworks is moved in distribution |
| Variable valve steams out greatly | 1 | FV-4 | Variable valve, topworks is moved in distribution |
| Little feed-regulating valve | 1 | FV-5 | Variable valve, topworks is moved in distribution |
| Big feed-regulating valve | 1 | FV-6 | Variable valve, topworks is moved in distribution |
| Get rid of the oil gas variable valve | 2 | FV-7，8 | Variable valve, topworks is moved in distribution |
| PLC interlocked control dish | 1 cover | Also can establish switch board, in DCS or SIS, realize |
More than used valve all be with information transmitter and steady arm band manual operation section.
Safe isolated gate buffer circuit all adopts IM33-22EX-HI/24VDC, IM35-22EX-HI/24VDC, the IM34-11EX-I safety isolated gate of Tours gram company.8 AI load modules all adopt the 6ES7 331-7KF02-0AB0 of Siemens Company.4 A0 output modules adopt the 6ES7322-5HD01-0AB0 of Siemens Company.16 DI load modules adopt the 6ES7322-1HH00-0AA0 of Siemens Company.16 DO output modules adopt the 6ES7322-5HD01-0AB0 of Siemens Company.CPU adopts 6ES733152F000AB0.Power supply adopts 6ES73071EA000AA0.Communication module adopts 6ES73411CH010AE0.MODBUS SLAVE software adopts 6ES78701AB010YA1.Interface module adopts 6ES71957DF100XA0.
The news signals (4-20mA) that return of pneumatic control valve FV-1 to FV-8 are connected with 8 AI load module 1-4 through IM33-22EX-HI/24VDC safety isolated gate, and 8 AI load module 1-4 are connected with CPU through core bus.The valve positioner control (4-20mA) of pneumatic control valve FV-1 to FV-8 is connected with 4 A0 output module 0-4,0-5 through IM35-22EX-HI/24VDC safety isolated gate.The news signals (4-20mA) that return of pneumatic control valve VV-1 to VV-3 are connected with 8 AI load module 1-5 through IM33-22EX-HI/24VDC safety isolated gate, and 8 AI load module 1-5 are connected with CPU through core bus.The valve positioner control (4-20mA) of pneumatic control valve VV-1 to VV-3 is connected with 4 A0 output module 0-7 through IM35-22EX-HI/24VDC safety isolated gate.The news signals (4-20mA) that return of pneumatic control valve ZV-1 to ZV-12, ZV-99, ZV-100, ZV-20 are connected with 8 AI load module 1-6,1-7 through IM33-22EX-HI/24VDC safety isolated gate, and 8 AI load module 1-6,1-7 are connected with CPU through core bus.The valve positioner control (4-20mA) of pneumatic control valve ZV-1 to ZV-12, ZV-99, ZV-100, ZV-20 is connected with 4 A0 output module 0-8 to 0-11 through IM35-22EX-HI/24VDC safety isolated gate.
Signal (DI) cut-in relay terminal is interrogated in returning of motorized valve BV-1 to BV-4, and through be connected to 16 DI load module 2-8 of PLC after isolating by the NO contact of relay, DI load module 2-8 is connected with CPU through core bus.The valve positioner signal of motorized valve BV-1 to BV-4 is isolated the back through relay and is connected with 16 DO output module 2-4.
Tower internal pressure PT11 to PT14, PT21 to PT24 transmitter (4-20mA) signal are connected with 8 AI load module 1-8 through IM33-22EX-HI/24VDC safety isolated gate.
Flow FT1, FT3 to FT8, liquid level LT1 transmitter (4-20mA) signal are connected with 8 AI load module 1-9 through IM33-22EX-HI/24VDC safety isolated gate.
Be operating as example to finish single tower, operation steps and control flow are as follows:
1) catches up with air
Control system obtain decoking finish signal and outer behaviour satisfy condition confirm after, to detect SV and point to new tower, BV-1, VV-1, ZV-3, ZV-7 closes, then carry out following action after above signal is all accurate successively: ZV-20 closes, ZV-9 opens, BV-3 opens, ZV-5 opens, ZV-99 opens, regulate FV-4 flow 10t/h automatically, and keeps one given period, and the commencing signal of road step under allowing is provided after finishing automatically.Timing simultaneously, each action should be finished in official hour, otherwise with the alarm indication error message, changes manual operation into, notifying operation personnel rectification.
2) pressure testing
Control system obtain outer behaviour satisfy condition confirm and catch up with air step end signal after, close ZV-9, by adjusting the FV-4 flow, after cat head reaches setting pressure, close ZV-99 according to old tower top pressure, clock the dwell time, and the outer behaviour of notice patrols and examines.
3) pressure release
Keep-up pressure reach preset time and obtain outer behaviour's confirmation signal after, adjust ZV-9 and ZV-5 aperture respectively according to tower top pressure, when tower top pressure reaches to after serving as a fill-in value, close ZV-9 and ZV-5, pressure release is finished and for descending the road step that commencing signal is provided.
4) draw oil gas
After obtaining pressure release and finishing signal and outer behaviour's confirmation signal, to detect ZV-3,, ZV-5, ZV-7, ZV-9, BV-1 valve position, signal is then to adjust the VV-1 aperture according to given time-valve position curve behind the Close All, after finishing the adjusting of VV-1 at the appointed time, draw that oil gas is finished and provide commencing signal for road step down.
5) set up the oil gas circulation
Obtain drawing oil gas and finish signal, detect the FV-7 valve position, signal is for after closing, then carry out open BV-3, FV-8 and according to the preset time-the valve position curve adjusts ZV-1 to certain aperture, when column bottom temperature reaches given numerical value FV-7 standard-sized sheet, FV-8 close, the ZV-1 standard-sized sheet, when getting rid of oil tank level and reach given numerical value, adjust VV-3 according to temperature-valve position curve, finishing after for descending the road step that commencing signal is provided.
6) switch production
Obtain oil gas circulation and finish signal, and after the cat head column bottom temperature reaches given numerical value and outer behaviour's confirmation signal, carry out then that BV-3 closes, ZV-1 closes, when getting rid of oil tank level and be reduced to given numerical value, carry out successively that BV-1 opens, VV-3 opens, SV turns to new tower.Provide commencing signal for following road step after finishing.
7) steam out for a short time
Obtain switch producing finish signal and operating personnel's confirmation signal after, carry out successively that BV-2 closes, ZV-99 opens, ZV-6 opens, BV-4 opens, FV-3 transfers to 5t/h immediately, the beginning of clocking, reach preset time after, provide commencing signal for descending the road step.
8) steam out greatly
For a short time steamed out finish signal after, whether whether detection emptying cat head blower fan reaches overhead reflux is set up, after satisfying, condition when tower top pressure is lower than setting pressure, adjusts the VV-2 aperture, when being higher than to roof pressure power, tower top pressure adjusts the FV-4 flow, when VV-2 complete shut-down, FV-4 standard-sized sheet, adjust FV-4 to given flow, and the beginning of clocking, after reaching preset time, steam out greatly and finish and provide commencing signal for following road step.
9) little feedwater
Steamed out greatly finish signal after, confirm to close FV-5,6, simultaneously outside start signal output coke cooling water pump, close FV-4, FV-3, ZV-99 successively, standard-sized sheet ZV-100, and adjust FV-5 to the given flow and the beginning of clocking, reach preset time after, little feedwater is finished and for descending the road step that commencing signal is provided.
10) big feedwater
After obtaining little feedwater and finishing signal and manual pushbutton confirmation signal, detect tower top pressure and be lower than setting pressure, then carry out according to given time-valve position curve and adjust the FV-6 flow.Behind the FV-6 standard-sized sheet, the beginning of clocking, reach preset time after, for following road step provides commencing signal.
11) change overflow
Obtaining changing overflow commencing signal and tower top pressure is lower than setting pressure, column bottom temperature and tower wall temperature and is lower than to fixed temperature, the hot-water cylinder liquid level is lower than given liquid level, and after obtaining outer behaviour's confirmation signal, carry out successively that ZV-4 closes, ZV-8 opens, ZV-20 opens, provide commencing signal for road step down after the release.
12) bubble is burnt
After obtaining steeping burnt signal and beginning, detect tower top pressure, column bottom temperature and tower wall temperature, all be lower than the given numerical value of this step after, carry out outside output signal successively and cutoff water pump, FV-6 closes, FV-5 closes, ZV-100 closes, BV-4 closes.And the beginning of clocking, reach preset time after, for following road step provides commencing signal.
13) discharge water
After the signal that obtains discharging water begins, detect tower top pressure, column bottom temperature and tower wall temperature, all be lower than the given numerical value of this step after, carry out FV-6 successively and close, FV-5 closes, ZV-100 closes, BV-4 closes.And the beginning of clocking, reach preset time after, discharge water and finish and provide commencing signal for following road step.
14) pay decoking
Obtain discharging water behind the signal, detect tower top temperature, tower wall temperature and column bottom temperature and all be lower than the given numerical value of this step, detect BV-4, ZV-6, ZV-20, ZV-8, VV-2, ZV-4, FV-2, BV-2, ZV-10 Close All, after signal is accurate, outer behaviour confirms to pay decoking, and output signal notice decoking class can decoking.
Annotate:
1. P (tower internal pressure)＜0.2MPa closes VV-2 (VV-1).
2. P (tower internal pressure)＞0.2MPa opens ZV-4 (ZV-3).
3. P (tower internal pressure)≤0.15MPa establishes FV-5 newly, opened once in 3 minutes, and aperture≤3%, P (tower internal pressure) 〉=0.24MPa closes FV-5, and the pass width of cloth is not limited.
4. P (tower internal pressure)≤0.15MPa establishes FV-6 newly, opened once in 3 minutes, and aperture≤3%, P (tower internal pressure) 〉=0.24MPa closes FV-6, and the pass width of cloth is not limited.
5. P (tower internal pressure)＞0.25MPa closes FV-4, ZV-99.
6. ZV-10 (ZV-9) opens 50% IF P (tower internal pressure)=0.06MPa TO ZV-10 (ZV-9)=0%.
7. IF P (tower internal pressure)=0.06MPa TO ZV-20=100%; IF P (tower internal pressure)=0.02MPa TO ZV-20=0%.
8. IF P (tower internal pressure)=0.02MPa TO ZV-6 (ZV-5)=0%.
9. VV-2 (VV-1) establishes 5%/5 minute newly to 100%.
10. ZV-2 (ZV-1) establishes 10%/10 minute newly to 20%, IF T (temperature in the tower)=170 ℃ of ZV-2 (ZV-1)=100%.
(11) IF T (temperature in the tower)=170 ℃ of FV-8=0%, FV-7=100%.
(12) VV-3 closes slowly according to temperature rise curve.
Claims (3)
1, a kind of delayed coking coke drum automatic operation system is characterized in that: constitutes by man-machine interface part, PLC part, buffer circuit, topworks, operation board and test section, wherein,
1. man-machine interface partly comprises host computer and LCDs or touch display screen, and host computer partly adopts the communication of MPI mouth to be connected with PLC, and LCDs or touch display screen partly adopt the DP-PROFIBUS communication to be connected with PLC;
2. the PLC input, output modular converter, communication module and the deciphering dog that partly comprise CPU, power supply, be connected with CPU;
3. buffer circuit is made of safety isolated gate, relay;
4. topworks comprises coker carbon Tower System crude oil pipeline, oil-gas pipeline, the coke cooling water line, steamline, the motorized valve of band information transmitter on the quench oil line, pneumatic valve, wherein, the motorized valve of belt switch digital signal information transmitter, pneumatic valve information transmitter end is connected with the input modular converter, the motorized valve of band analog quantity information transmitter, pneumatic valve information transmitter end is connected with the input modular converter through the safety isolated gate, the motorized valve of belt switch digital signal information transmitter, the pneumatic valve valve positioner is connected with the output modular converter through relay, the motorized valve of band analog quantity information transmitter, the pneumatic valve electrical header is connected with the output modular converter through the safety isolated gate;
5. operation board comprises data display screen and definite, reset key, and data display screen is connected with the output modular converter, and definite, reset key is connected with the input modular converter;
6. the test section comprises pressure transducer, the temperature sensor that is arranged in the tower, and the flow sensor on quench oil line, steamline, coke cooling water line, the crude oil pipeline gets rid of the liquid level sensor in the oil tank; This pressure transducer, temperature sensor, flow sensor, liquid level sensor are connected with the input modular converter through the safety isolated gate.
2, according to the described a kind of delayed coking coke drum automatic operation system of claim 1, it is characterized in that: be equipped with hand switch mechanism on the motorized valve of band information transmitter, the pneumatic valve on described crude oil pipeline, oil-gas pipeline, coke cooling water line, steamline, the quench oil line.
3, according to claim 1 or 2 described a kind of delayed coking coke drum automatic operation systems, it is characterized in that: described man-machine interface part, PLC part, buffer circuit, topworks, test section are respectively:
1. in the man-machine interface part, employing is fitted with the microcomputer and the touch display screen of INTOUCH9.0512 point exploitation version configuration software and STEP7V5.3 programming software, microcomputer partly adopts the communication of MPI mouth to be connected with PLC, and touch display screen partly adopts the DP-PROFIBUS communication to be connected with PLC;
2. in the PLC part, adopt CPU, adopt power supply, adopt 78 AI load modules (1-4,1-5,1-6,1-7,1-8,1-9,1-10), 3 16 DI load modules (2-8,2-9,2-10), employing 74 AO output modules (0-4,0-5,0-7,0-8,0-9,0-10,0-11), 3 16 DO output modules (2-4,2-5,2-6), adopt communication module (1-11), adopt the deciphering dog;
3. in the buffer circuit, between on-site signal that valve information transmitter, flow detection, Level Detection, tower internal pressure detect and thermocouple signal and 8 AI load modules, adopt safe isolated gate buffer circuit, the safe isolated gate buffer circuit of employing between 4 AO output modules of PLC output and valve positioner; Between valve Hui Xun and 16 DI load modules, adopt the relay buffer circuit, between 16 DO output modules of PLC output and valve positioner, adopt the relay buffer circuit;
4. in the topworks, comprise coker carbon Tower System crude oil pipeline, oil-gas pipeline, the coke cooling water line, steamline, the motorized valve of band information transmitter on the quench oil line, pneumatic valve, wherein, the motorized valve BV-1 of belt switch digital signal information transmitter～BV-4 information transmitter end is connected with 16 DI load modules (2-8) through the relay buffer circuit, the motorized valve of band analog quantity information transmitter, pneumatic valve ZV-1～ZV-12, ZV99, ZV20, ZV100, FV-1～FV-8, VV-1～VV-3 information transmitter end is through safety isolated gate buffer circuit and 8 AI load module (1-4,1-5,1-6,1-7) connect the motorized valve of belt switch digital signal information transmitter
BV-1～BV-4 steady arm is connected with 16 DO output modules (2-4) through the relay buffer circuit, and motorized valve, pneumatic valve ZV-1～ZV-12, ZV99, ZV20, ZV100, FV-1～FV-8, the VV-1～VV-3 steady arm of band analog quantity information transmitter are connected with 4 AO output modules (0-4,0-5,0-7,0-8,0-9,0-10,0-11) through safety isolated gate buffer circuit;
5. operation board comprises data presentation lamp and definite, reset key, and the data presentation lamp is connected with DO output module (2-4,2-5,2-6), and definite, reset key is connected with DI load module (2-8,2-9,2-10);
6. in the test section, pressure transducer PT11-PT14 in the tower, PT21-PT24, temperature sensor TE11-TE14, PT21-TE24, quench oil line, steamline, the cold flow sensor FT1-FT8 that waters on waterline, the crude oil pipeline, the liquid level sensor LT1 that gets rid of in the oil tank is connected with 8 AI load modules (1-8,1-9,1-10) through safety isolated gate buffer circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU200720085318XU CN201145850Y (en) | 2007-06-17 | 2007-06-17 | Automatic operation system for delayed coking coke chamber |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU200720085318XU CN201145850Y (en) | 2007-06-17 | 2007-06-17 | Automatic operation system for delayed coking coke chamber |
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| CN201145850Y true CN201145850Y (en) | 2008-11-05 |
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| CNU200720085318XU Expired - Fee Related CN201145850Y (en) | 2007-06-17 | 2007-06-17 | Automatic operation system for delayed coking coke chamber |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989087A (en) * | 2010-09-26 | 2011-03-23 | 中国石油化工股份有限公司 | On-line real-time failure monitoring and diagnosing system device for industrial processing of residual oil |
| CN102329633A (en) * | 2011-08-31 | 2012-01-25 | 上海优华系统集成技术有限公司 | Energy-saving process of steam mass blowing flow in delayed coking device |
| CN104460563A (en) * | 2013-09-23 | 2015-03-25 | 中国石油化工股份有限公司 | DCS and delayed coking coke drum sequence control system based on same |
| CN105005211A (en) * | 2015-08-26 | 2015-10-28 | 武汉大学 | Delayed coking process sequence control simulation system and method thereof |
| US9862889B2 (en) | 2012-05-11 | 2018-01-09 | Bp Corporation North America Inc. | Automated batch control of delayed coker |
| CN111320993A (en) * | 2020-03-17 | 2020-06-23 | 北京奥博斯工程技术有限公司 | Automatic coke cooling process method and control for coke tower |
| CN112226246A (en) * | 2020-09-03 | 2021-01-15 | 中国化学工程第六建设有限公司 | Hydraulic decoking control system |
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- 2007-06-17 CN CNU200720085318XU patent/CN201145850Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989087A (en) * | 2010-09-26 | 2011-03-23 | 中国石油化工股份有限公司 | On-line real-time failure monitoring and diagnosing system device for industrial processing of residual oil |
| CN101989087B (en) * | 2010-09-26 | 2013-01-23 | 中国石油化工股份有限公司 | On-line real-time failure monitoring and diagnosing system device for industrial processing of residual oil |
| CN102329633A (en) * | 2011-08-31 | 2012-01-25 | 上海优华系统集成技术有限公司 | Energy-saving process of steam mass blowing flow in delayed coking device |
| CN102329633B (en) * | 2011-08-31 | 2013-09-18 | 上海优华系统集成技术有限公司 | Energy-saving process of steam mass blowing flow in delayed coking device |
| US9862889B2 (en) | 2012-05-11 | 2018-01-09 | Bp Corporation North America Inc. | Automated batch control of delayed coker |
| US10696902B2 (en) | 2012-05-11 | 2020-06-30 | Bp Corporation North America Inc. | Automated batch control of delayed coker |
| CN104460563A (en) * | 2013-09-23 | 2015-03-25 | 中国石油化工股份有限公司 | DCS and delayed coking coke drum sequence control system based on same |
| CN104460563B (en) * | 2013-09-23 | 2017-05-31 | 中国石油化工股份有限公司 | DCS system and the delayed coking coke drum sequence control system based on DCS system |
| CN105005211A (en) * | 2015-08-26 | 2015-10-28 | 武汉大学 | Delayed coking process sequence control simulation system and method thereof |
| CN111320993A (en) * | 2020-03-17 | 2020-06-23 | 北京奥博斯工程技术有限公司 | Automatic coke cooling process method and control for coke tower |
| CN112226246A (en) * | 2020-09-03 | 2021-01-15 | 中国化学工程第六建设有限公司 | Hydraulic decoking control system |
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