CN205650071U - Automatically regulated adds ammonia system based on pH value - Google Patents
Automatically regulated adds ammonia system based on pH value Download PDFInfo
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- CN205650071U CN205650071U CN201620441544.6U CN201620441544U CN205650071U CN 205650071 U CN205650071 U CN 205650071U CN 201620441544 U CN201620441544 U CN 201620441544U CN 205650071 U CN205650071 U CN 205650071U
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Abstract
The utility model discloses a based on the automatically regulated of pH value with the ammonia system, belong to desulfurization technical field, mainly include the switch board, aqueous ammonia groove, first ammonia pump, second ammonia pump, pressure transmitter, electric -magnetic flow meter, electrical control valve and pH changer, the switch board is connected with pressure transmitter, electric -magnetic flow meter, electrical control valve, pH changer, first ammonia pump and second ammonia pump respectively, the entrance point of first ammonia pump is connected with aqueous ammonia groove, and the exit end of first ammonia pump is connected with ammonifying room entry and inlet of the circulating pump respectively, second ammonia water pump inlet end is connected with aqueous ammonia groove, and the exit end of second ammonia pump enters the mouth with the ammonifying room respectively and inlet of the circulating pump is connected. The utility model discloses reduce the consumption of the aqueous ammonia effectively, resources are saved puies forward high pressure heater ammonia efficiency, reduces operating personnel's improper operation, reduces operation personnel's intensity of labour.
Description
Technical field
This utility model relates to a kind of Automatic Ammonia adding control system, particularly to a kind of Ammonia adding System being automatically adjusted based on pH value, belongs to technical field of desulfurization.
Background technology
The outer ammonia desulfurizing process system of stove is absorbed equipment etc. such as concentrating oxidative system, desulfurizing agent storage and induction system, oxidation air system, fresh water (FW) system, fire fighting water system, sulfur ammonium dewatering system, sulfur ammonium package storage system, instrument air system and forms by flue gas system, desulfurization.Wherein, desulfurization absorption, oxidation, concentration systems have mainly reacted in desulfurizing tower, desulfurizing tower divides three parts: absorber portion, enriching section, oxidation panel, technical process is as follows: the former flue gas that boiler comes initially enters enriching section and lowers the temperature flue gas, feed liquid condensing crystallizing.Then flue gas is upwardly into absorber portion, and " ammonification " feed liquid of circulating pump squeezes into the absorber portion in desulfurizing tower, forms vaporific spray, and vaporific feed liquid is reacted with former flue gas, absorbs the SO in flue gas2, generating ammonium sulfite, dominant response is:
SO2+H2O+2NH3=(NH4)2SO3
Ammonium sulfite feed liquid, in oxidation panel cyclic process, is aoxidized by constantly pouring compressed air, generates ammonium sulfate, and dominant response is:
2(NH4)2SO3+O2=2 (NH4)2SO4
Under the evaporation of flue-gas temperature, the feed concentration of enriching section is continuously increased, and proportion is continuously increased, as increment 1.25g/l, begin with ammonium sulfate crystallization body to produce, when crystalline solid content reaches 15%, crystallization pump the feed liquid with solid content is squeezed into aftertreatment systems, enter centrifuge and carry out solid-liquid separation, then hot blast is utilized to dry, finally entering cyclone separator, packer, final products are the ammonium sulfate that water content is less than 1%, nitrogen content more than 20%.
In oxidation, absorption cycle system, circulation feed liquid is to carry out ammonification by the ammonification cell in oxidation panel, enters circulating pump by pump preceding pipeline, squeezes into absorber portion and carries out vaporific spray, absorbs the SO in flue gas2。
The shortcoming of this technical scheme is: 1, this process system can not control neat stress SO timely and effectively2, especially as former flue gas SO2During fluctuation, ammonification dosage has little time to adjust, and easily causes outlet neat stress SO2Exceed standard.It addition, this system cannot realize the regulation of ammonification automatization controls outlet SO2。
Cause reason: in above-mentioned desulfurization process, liquefied ammonia addition point ammonification cell in desulfurizing tower, first liquefied ammonia carry out with the feed liquid in oxidation panel reacting, diluting after entering ammonification cell, circulating pump is entered the most again by pump preceding pipeline, filter, squeeze into desulfurizing tower absorber portion and carry out vaporific spray, during whole, the SO of the former flue gas of import2Being uncertain, ammonification dosage regulates by the aperture of ammonification electric adjustable section door, and owing to liquefied ammonia is firstly added ammonification cell, from response speed with exist certain slow the time, the aperture control lag of ammonification regulation door is in former flue gas SO2Change, so easily cause outlet neat stress SO2Exceed standard, more cannot realize the regulation of ammonification automatization and control outlet SO2。
Shortcoming 2: ammonification excess phenomenon easily occurs in this process system, causes amount of ammonia slip excessive, and material ratio is low, chimney breast hangover is serious, causes secondary pollution.
Cause reason: as the former flue gas SO entering desulfurizing tower2During rising, manually regulate the outlet neat stress SO of control2Can rise therewith, ammonification regulation door must strengthen aperture, strengthens ammonification dosage, as former flue gas SO2During reduction, owing to this ammonification regulative mode exists hysteresis, causing ammonification excess, unnecessary liquefied ammonia can enter air with neat stress, and liquefied ammonia forms aerosol with vapor in the atmosphere, causes chimney to trail, air is caused secondary pollution.
Disclosed in 20 days April in 2016, Patent No. 201410505962.2, the Chinese invention patent of entitled " the outer ammonia process of desulfurization Ammonia adding System of stove " discloses the outer ammonia process of desulfurization Ammonia adding System of a kind of stove, it is characterized in that: ammonification point is located at desulfurizing tower to the pipeline between pump entry, makes ammonia residual follow former sulfur dioxide in flue gas content after improvement and be automatically adjusted.
As, on October 30th, 2013 is announced, number of patent application is CN201320296648.9, the Chinese utility model patent of entitled " a kind of ammonia type flue gas desulfurizing is automatically adjusted ammonifying device " discloses a kind of ammonia type flue gas desulfurizing and is automatically adjusted ammonifying device, and it sprays ammonia pipe, ammonia pump, ammonia storage tank and ammonification in including desulfurizing tower, tower and controls device.Ammonification controls device and includes automatic tester, central controller, ammonification actuator, ammonification valve.First embodiment, central controller, automatic tester, ammonification actuator are respectively electronic transmitter, electric controller and the YE of DDZ-III DDZ.Second embodiment, central controller, automatic tester, ammonification actuator are respectively microcomputer, the electronic transmitter of DDZ-III and DDZ-III YE, and, also it is electrically connected with analog/digital conversion circuit 17 between electronic transmitter and microcomputer, between microcomputer and YE, is also electrically connected with D/A switch circuit 18.Beneficial effect produced by this utility model: change Non-follow control ammonification for being automatically adjusted, Close loop servo control ammonification, detect sulfur dioxide emissioning concentration, real-time feedback control ammonia residual in real time, desulfurized effect is good.
As, on August 27th, 2014 is announced, number of patent application is CN201420034757.8, the Chinese utility model patent of entitled " a kind of Automatic Ammonia adding device " discloses a kind of Automatic Ammonia adding device, including medicine-chest, dosing pump, PLC control cabinet, pipe-line mixer and pH instrument, the port of export of described medicine-chest is connected with the arrival end of dosing pump by pipeline, the port of export of dosing pump is connected with the arrival end of pipe-line mixer by pipeline, pipe-line mixer is arranged on pure water conveying pipe, the port of export of pipe-line mixer arranges pH instrument, one outfan of described PLC control cabinet electrically connects with dosing pump, another outfan of PLC control cabinet electrically connects with pH instrument.This utility model makes ammonifying device achieve automatization, it is ensured that the pH value of water supply, adds the service life of watering equipment, and alleviates the labor intensity of workman, improves work efficiency, beneficially energy-saving and emission-reduction.
But, it still has the disadvantage that error is relatively big, sense the sensitiveest, and error rate is relatively big, and turn(a)round is long, and the deficiency such as fall short of service life.
Therefore it provides one is quick on the draw, error rate is little, and turn(a)round is short, and service life, the Ammonia adding System being automatically adjusted of the feature such as length just became the technical barrier that this technical field is badly in need of solving.
Utility model content
This utility model purpose is, for the problems referred to above, a kind of Ammonia adding System being automatically adjusted based on pH value is provided, by automatic improving, optimize and add ammonia process, be effectively reduced the consumption of ammonia, economize on resources, improve ammonification efficiency, reduce the improper operation of operator, reduce the labor intensity of operations staff.
For achieving the above object, technical scheme provided by the utility model is:
A kind of Ammonia adding System being automatically adjusted based on pH value, it is characterised in that: mainly include switch board, ammonia vessel, the first aqua ammonia pump, the second aqua ammonia pump, pressure transmitter, electromagnetic flowmeter, electric control valve and pH transmitter；Described switch board is connected with described pressure transmitter, electromagnetic flowmeter, electric control valve, pH transmitter respectively；Described switch board is connected with described first aqua ammonia pump and the second aqua ammonia pump；The entrance point of described first aqua ammonia pump is connected with described ammonia vessel, and the port of export of described first aqua ammonia pump is connected with ammonification chamber inlet and pump entry respectively；Described first aqua ammonia pump is connected with described pressure transmitter, electromagnetic flowmeter, electric control valve, pH transmitter respectively；Described second aqua ammonia pump entrance point is connected with described ammonia vessel, and the port of export of described second aqua ammonia pump is connected with ammonification chamber inlet and pump entry respectively；Described second aqua ammonia pump is connected with described pressure transmitter, electromagnetic flowmeter, electric control valve, pH transmitter respectively；Described electric control valve is connected with ammonification chamber inlet and pump entry respectively.
Preferably, said two aqua ammonia pump is the most standby, and aqua ammonia pump outlet converges at a female pipe.
Preferably, described switch board mainly includes intelligent CPU module, sequence control system (SCS), electrical equipment monitoring system (ECS) and module communication module.
Preferably, described intelligent CPU module includes 6ES7315-2AG10-0AB0.
Preferably, described sequence control system (SCS) includes PLC automatic program.
Preferably, described electrical equipment monitoring system (ECS) includes that ammeter, PLC state run display screen.
Preferably, described module communication module includes 6GK7343-1EX20-0XE0.
Beneficial effect:
Automatic Ammonia adding control system of the present utility model is owing to controlling and data acquisition scene, it is possible to saves and controls cable in a large number, and wiring is simple；Improve capacity of resisting disturbance and the reliability of system, reduce investment, install and maintenance cost, automatization's ammonification DCS system uses distributed arrangement, and the damage of any equipment does not affects the operation of whole system.
Automatization's ammonification control system achieves whole ammonification process and the monitoring of operating condition and control, can complete ammonification process is automatically controlled according to field monitoring data, improve the design level of ammonification automated system, embody the scientific and technological content of whole automatization Ammonia adding System.
Automatization's ammonification control system ensure that the safe, properly functioning of process system, improves the automatization level adding ammonia process, maintains major parameter properly functioning；By automatic improving, optimize and add ammonia process, significantly reduce the consumption of ammonia, economize on resources, improve ammonification efficiency, reduce the improper operation of operator, reduce the labor intensity of operations staff.
Automatic Ammonia adding device of the present utility model, on the basis of substantial amounts of calculating operation test, improves computational methods, and in calculating, several important parameters have carried out calculus process.Requirement, the change of system loading that various working is run can be met.Having and be quick on the draw, error rate is little, and turn(a)round is short, service life the advantage such as length.
Below by the drawings and specific embodiments, this utility model is described further, but is not meant to the restriction to this utility model protection domain.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model Ammonia adding System being automatically adjusted based on pH value.
Main Reference Numerals illustrates:
1 switch board 2 ammonia vessel
3 first aqua ammonia pump 4 second aqua ammonia pumps
5 pressure transmitter 6 electromagnetic flowmeters
7 electric control valve 8 pH transmitters
Detailed description of the invention
As it is shown in figure 1, be the structural representation of this utility model Ammonia adding System being automatically adjusted based on pH value, wherein, 1 is switch board, 2 is ammonia vessel, and 3 is the first aqua ammonia pump, and 4 is the second aqua ammonia pump, and 5 is pressure transmitter, 6 is electromagnetic flowmeter, and 7 is electric control valve, and 8 is pH transmitter；Wherein, switch board 1 includes intelligent CPU module, pressure transmitter 5 and electromagnetic flowmeter 6 belong to data collecting system (DAS), first aqua ammonia pump 3 and the second aqua ammonia pump 4 belong to analog control system (MCS), and electric control valve 7 belongs to sequence control system (SCS).Switch board 1 includes electrical equipment monitoring system (ECS) i.e. display screen, and communication module integrated in switch board 1 belongs to module communication module；
Described switch board 1 is connected with described pressure transmitter 5 by hardwire；Described switch board 1 is connected with described electromagnetic flowmeter 6 by hardwire；Described switch board 1 is connected with electric control valve 7 by hardwire；Described switch board 1 is connected with described pH transmitter 8 by hardwire；Described switch board 1 is connected with described first aqua ammonia pump 3 and the second aqua ammonia pump 4 by hardwire；The entrance point of described first aqua ammonia pump 3 is connected with described ammonia vessel 2, and the port of export of described first aqua ammonia pump 3 is connected with ammonification chamber inlet and pump entry respectively；Described first aqua ammonia pump 3 is connected with described pressure transmitter 5, electromagnetic flowmeter 6, electric control valve 7, pH transmitter 8 respectively；Described second aqua ammonia pump 4 entrance point is connected with described ammonia vessel 2, and the port of export of described second aqua ammonia pump 4 is connected with ammonification chamber inlet and pump entry respectively；Described second aqua ammonia pump 4 is connected with described pressure transmitter 5, electromagnetic flowmeter 6, electric control valve 7, pH transmitter 8 respectively；Described electric control valve 7 is connected with ammonification chamber inlet and pump entry respectively.
Described first aqua ammonia pump and the second aqua ammonia pump are the most standby, and two ammonia delivery side of pump converge at a female pipe.
Described switch board mainly includes intelligent CPU module, sequence control system (SCS), electrical equipment monitoring system (ECS) and module communication module.
Described intelligent CPU module includes 6ES7315-2AG10-0AB0.
Described sequence control system (SCS) includes PLC automatic program.
Described electrical equipment monitoring system (ECS) includes that ammeter and PLC state run display screen.
Described module communication module includes 6GK7343-1EX20-0XE0.
The composition of this utility model Ammonia adding System being automatically adjusted based on pH value: 1. process control level (Automatic Ammonia adding control system)；2. monitoring and management level (industry control level, built-in configuration software)；3. spot sensor instrument and meter.
1, the process control level of Automatic Ammonia adding control system:
Process control level uses the Field Production Data such as various measuring instruments instrument collection site pressure, temperature, concentration, pH value, flow, controls production process by PLC and actuator (electric control valve, converter).When system is properly functioning, using closed loop control, controlled volume is automatically controlled by system according to the difference of setting value and actual value, makes it stable in rational scope, carries out safe efficient production.When needs human intervention, then using opened loop control, by control value, the operator in control room are ensured that system is properly functioning by adjusting, it is achieved safety in production.When control system occurs abnormal, then directly the actuators such as each valve, converter are carried out Non-follow control to guarantee that whole system is safe and stable, effectively to run by site operation personnel.
2, the monitoring of Automatic Ammonia adding control system and management level:
Monitoring and management level use industrial control computer.Whole system is monitored by supervisory control and data aquisition system software and manages by monitoring and management personnel.Ammonification control system can be opened/stop control, the properly functioning of system is monitored and adjusted, processing exception with accident conditions by the staff of operator station, and can not revise data.Engineer station not only has the function at normal operator station, moreover it is possible to whole system carries out configuration, programs and debug.
The supervision scope of monitoring and management level includes: opening/stopping of A: field control equipment operates and running status；
B: the pH value of Automatic Ammonia adding control system；Off-limits monitoring data can be carried out automatic alarm, show over the display by C: have auto-alarm function, and alarm range includes: pH value is too high or too low；Moment crossed by electric control valve.
3, spot sensor instrument and meter:
Use the aqua ammonia pump of frequency conversion motor, electric control valve, pressure transmitter, pH value transmitter, electromagnetic flowmeter, ammeter.
The control function of this utility model Ammonia adding System being automatically adjusted based on pH value:
The Ammonia adding System that this utility model is based on pH value to be automatically adjusted realize the data acquisition to whole ammonification process system, control, regulate, report to the police, interlock, protect, the function such as form, and by configuration picture by parameters various in technological process, run equipment state and show on man-machine system.
This utility model Ammonia adding System being automatically adjusted based on pH value can realize automatically detecting and adjust pH value, automatically calculate and control ammonia dosage, record system capital equipment runs and maintenance condition, can have access to above-mentioned operational factor and trend curve at random, related data preserves more than 6 months.
The main control point of the whole Ammonia adding System being automatically adjusted based on pH value include the motor such as electric control valve, aqua ammonia pump on the spot, remotely control；The digital data collection such as all kinds of operations, driving, fault-signal, switch are spacing.Also include the pressure of pipeline, the flow of ammonia, the pH value of turnover desulfurizing tower circulation fluid, the analog data collection such as the current of electric of aqua ammonia pump.
1, data collecting system (DAS)
Data collecting system (DAS) can continuous acquisition relevant with processing all and based on pH value ammonification techniques important measuring point signal and equipment state signal, in order to timely provide relevant real time information to operator.Basic function is as follows:
Process variable monitors；
Alarm indicator and process；
Flow process figure shows；
Giving of system operational parameters；
Printing reports；
Alarm logging；
2, analog control system (MCS)
(1) circulatory pool slurry pH value self-stabilization PID controls；
(2) ammonia pipeline pressure self-stabilization controls.
3, sequential control (SCS) function group: the start and stop of conventional equipment and interlocked control
Ammonia system controls, including aqua ammonia pump, electric control valve.
The current signal of 4, electrical equipment monitoring system (ECS): aqua ammonia pump motor enters DCS.
The reliability of this utility model Ammonia adding System being automatically adjusted based on pH value:
1, redundancy is arranged
Data highway redundancy；
Power module redundancy；
Crucial analog quantity parameter redundancy is arranged.
2, DCS system allowance
Time the busiest, the load of controller CPU is not more than 60%, and operator station rate of load condensate is not more than 40%；
Internal storage takies capacity and is not more than 50%, and external memory storage occupies capacity and is not more than 40%；
I/O module groove allowance is no less than 15%；
Power supply load margin is no less than 30%；
The rate of load condensate of communication bus is not more than 30%.
The explanation of above-described embodiment, is not to this utility model structure, the restriction of technique, any technique this utility model made the structure after simple transformation, or has identical function, belongs to the protection domain of this utility model patent.
Claims (5)
1. the Ammonia adding System being automatically adjusted based on pH value, it is characterised in that: mainly include switch board, ammonia vessel, the first aqua ammonia pump, the second aqua ammonia pump, pressure transmitter, electromagnetic flowmeter, electric control valve and pH transmitter；Described switch board is connected with described pressure transmitter, electromagnetic flowmeter, electric control valve, pH transmitter respectively；Described switch board is connected with described first aqua ammonia pump and the second aqua ammonia pump；The entrance point of described first aqua ammonia pump is connected with described ammonia vessel, and the port of export of described first aqua ammonia pump is connected with ammonification chamber inlet and pump entry respectively；Described first aqua ammonia pump is connected with described pressure transmitter, electromagnetic flowmeter, electric control valve, pH transmitter respectively；Described second aqua ammonia pump entrance point is connected with described ammonia vessel, and the port of export of described second aqua ammonia pump is connected with ammonification chamber inlet and pump entry respectively；Described second aqua ammonia pump is connected with described pressure transmitter, electromagnetic flowmeter, electric control valve, pH transmitter respectively；Described electric control valve is connected with ammonification chamber inlet and pump entry respectively.
The Ammonia adding System being automatically adjusted based on pH value the most according to claim 1, it is characterised in that: described first aqua ammonia pump and the second aqua ammonia pump are the most standby, and its outlet converges at a female pipe.
The Ammonia adding System being automatically adjusted based on pH value the most according to claim 2, it is characterised in that: described switch board mainly includes intelligent CPU module, sequence control system, electrical equipment monitoring system and module communication module.
The Ammonia adding System being automatically adjusted based on pH value the most according to claim 3, it is characterised in that: described sequence control system includes PLC automatic program.
The Ammonia adding System being automatically adjusted based on pH value the most according to claim 4, it is characterised in that: described electrical equipment monitoring system includes that ammeter and PLC state run display screen.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105749729A (en) * | 2016-05-15 | 2016-07-13 | 张波 | Ammonification system based on automatic-adjusted pH value |
| US10099170B1 (en) | 2017-06-14 | 2018-10-16 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
-
2016
- 2016-05-15 CN CN201620441544.6U patent/CN205650071U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105749729A (en) * | 2016-05-15 | 2016-07-13 | 张波 | Ammonification system based on automatic-adjusted pH value |
| US10099170B1 (en) | 2017-06-14 | 2018-10-16 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
| EP3415222A1 (en) * | 2017-06-14 | 2018-12-19 | Jiangnan Environmental Protection Group Inc. | Automatic ammonia-adding system and method for ammonia-based desulfurization device |
| US10159929B1 (en) | 2017-06-14 | 2018-12-25 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
| US10583386B2 (en) | 2017-06-14 | 2020-03-10 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
| US10589212B2 (en) | 2017-06-14 | 2020-03-17 | Jiangnan Environmental Protection Group Inc. | Ammonia-adding system for ammonia-based desulfurization device |
| EP3842125A1 (en) * | 2017-06-14 | 2021-06-30 | Jiangnan Environmental Protection Group Inc. | Automatic ammonia-adding system and method for ammonia-based desulfurization device |
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