CN108415265B - Ship exhaust gas denitration function analog simulation system - Google Patents
Ship exhaust gas denitration function analog simulation system Download PDFInfo
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- CN108415265B CN108415265B CN201810077649.1A CN201810077649A CN108415265B CN 108415265 B CN108415265 B CN 108415265B CN 201810077649 A CN201810077649 A CN 201810077649A CN 108415265 B CN108415265 B CN 108415265B
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- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B17/00—Systems involving the use of models or simulators of said systems
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Abstract
The invention discloses a ship exhaust gas denitration function simulation system which comprises a touch screen, a PLC (programmable logic controller), a relay, a button switch and an indicator light, wherein a hardware signal of a ship exhaust gas denitration device is simulated by using a switching value input/output module of the PLC, the relay and a 4-20mA input/output module of the PLC, and a logic relation among various hardware signals is realized by using software programming of the PLC; corresponding simulation control output signals are designed aiming at different ship exhaust gas denitration devices, working condition simulation in the whole process of ship exhaust gas denitration is achieved, simulation parameters can be modified, a ship exhaust gas denitration control system is debugged, whether the response of the ship exhaust gas denitration control system is correct or not is confirmed, and the field debugging time of the ship exhaust gas denitration control system is shortened. The training device can be used for training and learning of beginners, overcomes the defects of high difficulty, time and labor waste and the like of the traditional training work, and reduces the training cost of the ship exhaust gas denitration control system.
Description
Technical Field
The invention relates to a ship waste gas denitration function simulation system, and belongs to the field of ships.
Background
The existing ship exhaust gas treatment system mostly adopts a Selective Catalytic Reduction (SCR) mode to remove NOx in ship exhaust gas, the mode needs to install a reactor with a catalyst, the size is large, in addition, quantitative urea solution or ammonia water needs to be injected, and the problems of high investment and operation cost, pollution caused by excessive ammonia leakage to the atmosphere, narrow reaction temperature window, catalyst poisoning and the like exist.
At present, the ship waste gas denitration system adopts automatic control, the whole process of ship waste gas denitration can be monitored through an upper computer, an operator can control the whole system only by operating the upper computer, and the automatic operation of the system is realized.
The debugging of traditional boats and ships waste gas deNOx systems often need start the boats and ships host computer, wastes time and energy and takes oil, if debug at real ship, still must debug at the in-process of boats and ships navigation, and this causes very big inconvenience to the system debugging undoubtedly, also has certain riskiness. In addition, as the ship main engine is required to be operated for debugging the ship exhaust gas denitration system, great inconvenience is brought to operation training, and therefore, designing and developing a ship exhaust gas denitration function simulation system is very important.
Disclosure of Invention
The invention aims to establish a ship exhaust gas denitration function simulation system, which can realize the working condition simulation in the whole process of ship exhaust gas denitration, can be used for debugging a ship exhaust gas denitration system and can also be used for training, so that an operator and a system debugging beginner can visually learn and analyze the system.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a ship exhaust gas denitration function simulation system is characterized by comprising a touch screen, a PLC, a relay, a button switch and an indicator light, wherein a hardware signal of a ship exhaust gas denitration device is simulated by using a switching value input/output module of the PLC, the relay and a 4-20mA input/output module of the PLC, and a logic relation among various hardware signals is realized by using software programming of the PLC; designing corresponding simulation control output signals aiming at different ship exhaust gas denitration equipment;
the simulated ship exhaust gas denitration device comprises: a urea storage tank level gauge, a urea storage tank temperature sensor, a urea storage tank outlet valve, a flush valve, a urea addition pump, a urea pipeline pressure sensor, a urea pipeline flow sensor, a urea spray gun compressed air valve, a urea spray gun compressed air flow switch, a ventilation pipeline compressed air valve, a ventilation pipeline compressed air flow switch, a soot blowing pipeline compressed air valve, a soot blowing pipeline compressed air pressure sensor, a reactor inlet temperature sensor, a reactor differential pressure sensor, a reactor outlet temperature sensor, a nitrogen oxide concentration sensor, an oxygen concentration sensor, a ship exhaust gas denitration system outlet valve, a ship exhaust gas denitration system inlet valve, a ship exhaust gas denitration system bypass valve, an MDT low-speed ship host communication signal, a WINGD low-speed ship host communication signal, a controller, The device comprises a medium-speed ship host communication signal, a urea solution, compressed air, a mixer, a reactor, ship waste gas, flushing water and a heat tracing band, wherein the device is simulated according to the connection relation of actual ship waste gas denitration devices.
The invention has the advantages that:
1. the ship exhaust gas denitration function simulation system is established, working condition simulation in the whole process of ship exhaust gas denitration is realized, the ship exhaust gas denitration control system can be debugged by modifying simulation parameters, whether the response of the ship exhaust gas denitration control system is correct or not is confirmed, and the field debugging time of the ship exhaust gas denitration control system is shortened.
2. The training device can be used for training and learning of beginners, overcomes the defects of high difficulty, time and labor waste and the like of the traditional training work, and reduces the training cost of the ship exhaust gas denitration control system.
3. Because the ship exhaust gas denitration simulation system can simulate all functions of on-site actual equipment, different running states of the equipment can be simulated by modifying system parameters of the ship exhaust gas denitration simulation system, the capability of training personnel for solving alarm faults is improved, and the training effect of the training personnel is improved.
Drawings
FIG. 1 is a general diagram of the system of the present invention and the structural relationship between the system and a ship exhaust gas denitration control system;
fig. 2 is a schematic diagram of the overall structure of a ship exhaust gas denitration system simulated by the invention.
Detailed Description
Referring to fig. 1 and 2, the ship exhaust gas denitration function simulation system of the present invention is characterized by comprising a touch screen, a PLC, a relay, a button switch and an indicator light, wherein hardware signals of a ship exhaust gas denitration device are simulated by using a switching value input/output module of the PLC, the relay and a 4-20mA input/output module of the PLC, and a logical relationship between various hardware signals is realized by using software programming of the PLC; designing corresponding simulation control output signals aiming at different ship exhaust gas denitration equipment;
the simulated ship exhaust gas denitration device comprises: a urea storage tank liquid level meter 1, a urea storage tank temperature sensor 2, a urea storage tank outlet valve 3, a flushing valve 4, a urea addition pump 5, a urea pipeline pressure sensor 6, a urea pipeline flow sensor 7, a urea spray gun compressed air valve 8, a urea spray gun compressed air flow switch 9, a ventilation pipeline compressed air valve 10, a ventilation pipeline compressed air flow switch 11, a soot blowing pipeline compressed air valve 12, a soot blowing pipeline compressed air pressure sensor 13, a reactor inlet pressure sensor 14, a reactor inlet temperature sensor 15, a reactor differential pressure sensor 16, a reactor outlet pressure sensor 17, a reactor outlet temperature sensor 18, a nitrogen oxide concentration sensor 19, an oxygen concentration sensor 20, a ship exhaust gas denitration system outlet valve 21, a ship exhaust gas denitration system inlet valve 22, a ship exhaust gas denitration system bypass valve 23, an MDT low-speed ship host communication signal 24, a urea injection pipeline pressure sensor 6, a, The device comprises a WINGD low-speed ship host communication signal 25, a medium-speed ship host communication signal 26, a urea solution 27, compressed air 28, a mixer 29, a reactor 30, ship exhaust gas 31, washing water 32 and a heat tracing band 33, wherein the devices are simulated according to the connection relation of actual ship exhaust gas denitration devices.
The denitration of the ship exhaust gas mainly comprises the following working condition processes:
the urea adding process comprises the following steps: according to the communication signal 24 of the MDT low-speed ship main engine, or the communication signal 25 of the WINGD low-speed ship main engine, or the communication signal 26 of the middle-speed ship main engine, the urea adding amount is calculated, then the urea solution 27 passes through the outlet valve 3 of the urea storage tank and the urea adding pump 5, meanwhile, the compressed air 28 is mixed with the urea solution 27 through the compressed air valve 8 of the urea spray gun and then is injected into the mixer 29, and is mixed with the ship waste gas 31 and then enters the reactor 30.
And (3) washing process: according to the MDT low-speed ship host communication signal 24, the WINGD low-speed ship host communication signal 25 or the medium-speed ship host communication signal 26, the washing water 32 passes through the washing valve and the urea adding pump 5, and the compressed air 28 is mixed with the washing water 32 through the compressed air valve 8 of the urea spray gun and then injected into the mixer 29.
A soot blowing process: compressed air 28 is then compressed into the reactor 30 via the sootblowing line compressed air valve 11 in response to either an MDT low speed marine host communication signal 24, or a WINGD low speed marine host communication signal 25, or a medium speed marine host communication signal 26.
And (3) ventilation process: compressed air 28 is then compressed into the reactor 30 via the vent line compressed air valve 10 in response to either an MDT low speed marine host communication signal 24, or a WINGD low speed marine host communication signal 25, or a medium speed marine host communication signal 26.
A heat tracing process: the reactor 30 is heated by the power supply of the heat tracing band 33 according to the MDT low-speed ship host communication signal 24, the WINGD low-speed ship host communication signal 25 or the medium-speed ship host communication signal 26.
The ship exhaust gas denitration simulation system comprises the following components for valve types: urea storage tank outlet valve 3, flushometer 4, urea spray gun compressed air valve 8, ventilation pipeline compressed air valve 10, soot blowing pipeline compressed air valve 12, boats and ships exhaust gas denitration system outlet valve 21, boats and ships exhaust gas denitration system inlet valve 22, boats and ships exhaust gas denitration system bypass valve 23 are provided with 6 parameters, including valve opening command, valve closing command, valve position open feedback, valve position close feedback, valve opening time, valve closing time.
The ship exhaust gas denitration simulation system comprises a urea storage tank liquid level meter 1, a urea storage tank temperature sensor 2, a urea pipeline pressure sensor 6, a urea pipeline flow sensor 7, a soot blowing pipeline compressed air pressure sensor 13, a reactor inlet pressure sensor 14, a reactor inlet temperature sensor 15, a reactor differential pressure sensor 16, a reactor outlet pressure sensor 17, a reactor outlet temperature sensor 18, a nitrogen oxide concentration sensor 19 and an oxygen concentration sensor 20, and is provided with 5 parameters including a high alarm value, a low alarm value and a disconnection alarm.
The ship exhaust gas denitration simulation system is provided with a disconnection alarm for communication, including an MDT low-speed ship host communication signal 24, a WINGD low-speed ship host communication signal 25 and an intermediate-speed ship host communication signal 26.
Claims (3)
1. A ship exhaust gas denitration function simulation system is characterized by comprising a touch screen, a PLC, a relay, a button switch and an indicator light, wherein a hardware signal of a ship exhaust gas denitration device is simulated by using a switching value input/output module of the PLC, the relay and a 4-20mA input/output module of the PLC, and a logic relation among various hardware signals is realized by using software programming of the PLC; designing corresponding simulation control output signals aiming at different ship exhaust gas denitration equipment;
the simulated ship exhaust gas denitration device comprises: urea storage tank level gauge (1), urea storage tank temperature sensor (2), urea storage tank outlet valve (3), flushometer (4), urea adds pump (5), urea pipeline pressure sensor (6), urea pipeline flow sensor (7), urea spray gun compressed air valve (8), urea spray gun compressed air flow switch (9), ventilation pipeline compressed air valve (10), ventilation pipeline compressed air flow switch (11), soot blowing pipeline compressed air valve (12), soot blowing pipeline compressed air pressure sensor (13), reactor inlet pressure sensor (14), reactor inlet temperature sensor (15), reactor differential pressure sensor (16), reactor outlet pressure sensor (17), reactor outlet temperature sensor (18), nitrogen oxide concentration sensor (19), oxygen concentration sensor (20), The device comprises a ship exhaust gas denitration system outlet valve (21), a ship exhaust gas denitration system inlet valve (22), a ship exhaust gas denitration system bypass valve (23), an MDT low-speed ship host communication signal (24), a WINGD low-speed ship host communication signal (25), a medium-speed ship host communication signal (26), urea solution (27), compressed air (28), a mixer (29), a reactor (30), ship exhaust gas (31), flushing water (32) and a heat tracing band (33), wherein the devices are simulated according to the connection relation of actual ship exhaust gas denitration devices;
simulating parameters of valves in the ship exhaust gas denitration equipment, wherein the parameters comprise a valve opening command, a valve closing command, valve position opening feedback, valve position closing feedback, valve opening time and valve closing time; the valve-type apparatus includes: the device comprises a urea storage tank outlet valve (3), a flushing valve (4), a urea spray gun compressed air valve (8), a ventilation pipeline compressed air valve (10), a soot blowing pipeline compressed air valve (12), a ship waste gas denitration system outlet valve (21), a ship waste gas denitration system inlet valve (22) and a ship waste gas denitration system bypass valve (23);
the work process of the simulated ship exhaust gas denitration device comprises the following steps:
the urea adding process comprises the following steps: according to the communication signal (24) of the MDT low-speed ship main engine, or the communication signal (25) of the WINGD low-speed ship main engine, or the communication signal (26) of the medium-speed ship main engine, the urea addition amount is calculated, then the urea solution (27) passes through an outlet valve (3) of a urea storage tank and a urea addition pump (5), meanwhile, compressed air (28) is mixed with the urea solution (27) through a compressed air valve (8) of a urea spray gun and then is injected into a mixer (29), and the mixed air and the ship waste gas (31) enter a reactor (30);
and (3) washing process: according to the MDT low-speed ship host communication signal (24), or the WINGD low-speed ship host communication signal (25), or the medium-speed ship host communication signal (26), then the washing water (32) passes through the washing valve and the urea adding pump (5), and simultaneously the compressed air (28) is mixed with the washing water (32) through the urea spray gun compressed air valve (8) and then is injected into the mixer (29);
a soot blowing process: according to the MDT low-speed ship host communication signal (24), or the WINGD low-speed ship host communication signal (25), or the medium-speed ship host communication signal (26), compressed air (28) enters a reactor (30) through a soot blowing pipeline compressed air valve (12);
and (3) ventilation process: according to the MDT low-speed ship host communication signal (24), or the WINGD low-speed ship host communication signal (25), or the medium-speed ship host communication signal (26), compressed air (28) is compressed into the reactor (30) through the ventilation pipeline to compress the air valve (10);
a heat tracing process: according to the MDT low-speed ship host communication signal (24), or the WINGD low-speed ship host communication signal (25), or the medium-speed ship host communication signal (26), the heat tracing band (33) supplies power to heat the reactor (30).
2. The ship exhaust gas denitration function simulation system according to claim 1, wherein simulation parameters for sensors in the ship exhaust gas denitration device include a high alarm value, a low alarm value and a disconnection alarm; the sensor-like device comprises: the device comprises a urea storage tank liquid level meter (1), a urea storage tank temperature sensor (2), a urea pipeline pressure sensor (6), a urea pipeline flow sensor (7), a soot blowing pipeline compressed air pressure sensor (13), a reactor inlet pressure sensor (14), a reactor inlet temperature sensor (15), a reactor differential pressure sensor (16), a reactor outlet pressure sensor (17), a reactor outlet temperature sensor (18), a nitrogen oxide concentration sensor (19) and an oxygen concentration sensor (20).
3. The ship exhaust gas denitration function simulation system according to claim 1, wherein the simulation parameter for communication in the ship exhaust gas denitration device is a disconnection alarm, and the communication device comprises: MDT low-speed ship host communication signal (24), WINGD low-speed ship host communication signal (25) and medium-speed ship host communication signal (26).
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| CN111489605B (en) * | 2020-04-21 | 2021-01-26 | 大唐环境产业集团股份有限公司 | Ammonia spraying optimization control simulation system based on Simulink and WinCC |
| CN112691547A (en) * | 2021-01-11 | 2021-04-23 | 中国船舶重工集团公司第七一一研究所 | Tail gas denitration control system based on programmable logic controller |
| CN116392938B (en) * | 2023-06-07 | 2023-08-29 | 张家港市锦明环保工程装备有限公司 | Waste gas denitration reaction process |
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