CN107286058A - One section of evaporation control system of urea and method - Google Patents
One section of evaporation control system of urea and method Download PDFInfo
- Publication number
- CN107286058A CN107286058A CN201710724273.4A CN201710724273A CN107286058A CN 107286058 A CN107286058 A CN 107286058A CN 201710724273 A CN201710724273 A CN 201710724273A CN 107286058 A CN107286058 A CN 107286058A
- Authority
- CN
- China
- Prior art keywords
- section
- evaporation
- evaporator
- regulating valve
- outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
- C07C273/14—Separation; Purification; Stabilisation; Use of additives
- C07C273/16—Separation; Purification
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention discloses one section of evaporative concn control system of urea, it includes one section of vapor seperator, the primary evaporator heater being connected with one section of vapor seperator, Trunk Line, one section of evaporation urine concentration controller, one section of evaporation outlet thermocouple thermometer, primary evaporator heater steam pressure regulating valve, one section of evaporation outlet temperature series adjustment device, primary evaporator heater steam pressure transmitter, one section of evaporator vacuum transmitter, one section of evaporator concentration bunch grade adjustment device, one section of evaporator vacuum pressure-regulating valve, control system.The present invention provides a kind of new method and system by obtaining one section of evaporation urine concentration indirectly.The CO that the present invention is built with the same period2Stripping subtraction unit is compared, and can reduce investment outlay more than 30%, steam consumption is down to 905 kg/ton.The present invention is safe, more reliable and more stable；Easy to operate, control is simple, automaticity is high.The invention also discloses one section of evaporative concn control method of urea.
Description
Technical field
Field, more particularly to a kind of one section of evaporation control system of urea and method are manufactured the present invention relates to urea.
Background technology
One section of evaporation outlet urine concentration of urea, because temperature is high, the features such as easily crystallizing is difficult on-line analysis.The whole world
Analyzer producer, studies it as a problem, generally using manual analysis, is in urine concentration by Pressure/Temperature
The principle of mathematical modeling relation calculates the concentration of urine, to control one section of evaporation outlet urine concentration of urea.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of one section of evaporation of urea for being capable of on-line analysis
Control system and method, obtain one section of evaporation urine concentration indirectly.
The purpose of the present invention is achieved through the following technical solutions：One section of evaporative concn control system of urea, it is wrapped
Include one section of vapor seperator, the primary evaporator heater being connected with one section of vapor seperator, Trunk Line, one section of evaporation urine concentration
Controller, one section of evaporation outlet thermocouple thermometer, primary evaporator heater steam pressure regulating valve, one section of evaporation outlet temperature
Bunch grade adjustment device, primary evaporator heater steam pressure transmitter, one section of evaporator vacuum transmitter, one section of evaporator concentration
Bunch grade adjustment device, one section of evaporator vacuum pressure-regulating valve and control system；
Described one section of evaporation urine concentration controller install be easy to watch by one section of vapor seperator at the scene, operate or
One section of evaporation urine concentration controller of person is the One function module inside control system；Monitoring temperature, pressure union, output
Signal is to control system；
Described control system is DCS control systems；
Described Trunk Line vacuumizes supervisor including one section of evaporator separator outlet Trunk Line, one section of evaporator separator
Line, primary evaporator heater steam inlet Trunk Line and liquid pump Trunk Line；Primary evaporator heater steam inlet Trunk Line, liquid pump
Trunk Line is connected with primary evaporator heater respectively, and one section of evaporator separator outlet Trunk Line, one section of evaporator separator are taken out
Vacuum main's line is connected with one section of vapor seperator respectively；
Primary evaporator heater steam pressure regulating valve is provided with primary evaporator heater steam inlet Trunk Line；
Primary evaporator heater steam pressure transmitter be arranged on primary evaporator heater steam inlet Trunk Line or
On primary evaporator heater；
One section of evaporation outlet thermocouple thermometer is provided with one section of evaporator separator outlet Trunk Line；
One section of evaporator separator, which is vacuumized, is provided with one section of evaporator vacuum pressure-regulating valve on Trunk Line；
One section of evaporator vacuum transmitter is provided with one section of vapor seperator；
Primary evaporator heater steam pressure regulating valve, primary evaporator heater steam pressure transmitter and one section are evaporated
Mouth thermocouple thermometer is electrically connected with one section of evaporation outlet temperature series adjustment device respectively；
One section of evaporator concentration bunch grade adjustment device is true with one section of evaporator vacuum pressure-regulating valve, one section of evaporator respectively
Reciprocal of duty cycle transmitter and one section of evaporation urine concentration controller connection；One section of evaporation urine concentration controller is also respectively connected with one section of steaming
Send out device vacuum transmitter and one section of evaporation outlet thermocouple thermometer.
It is preferred that, one section of evaporation outlet urine concentration controller is arranged on one section of vapor seperator side, described
One section of evaporation urine concentration controller on be provided with display screen, display screen is used for displays temperature, pressure and other parameters.
It is preferred that, it is 300mm that the length of Φ 14 is installed in perforate on one section of vapor seperator outlet Trunk Line
Temperature protecting pipe, one section evaporation outlet thermocouple thermometer length it is consistent with the length of thermometric protecting pipe；One section evaporates
Temperature signal is accessed one section of evaporation urine concentration by mouth thermocouple thermometer using three one group I grades of E type thermocouple thermometers
Controller.
It is preferred that, described primary evaporator heater steam pressure transmitter is arranged on primary evaporator heater
On, on primary evaporator heater top, a stop valve is installed in perforate, and introducing one section of evaporation with the stainless steel pressure guiding pipes of Φ 14 heats
The positive pressure side of device steam pressure transmitter, DCS control systems are delivered to by transducer signal.
It is preferred that, one section of described evaporator vacuum transmitter is arranged at the top of one section of vapor seperator,
One section of vapor seperator top drilling installs a stop valve, and introducing one section of evaporator vacuum with the stainless steel pressure guiding pipes of Φ 14 becomes
The positive pressure side of device is sent, pressure signal is accessed into one section of evaporation urine concentration controller, negative pressure is detected using absolute pressure gauge, by transmitter
Signal delivers to one section of evaporation urine concentration controller.
One section of evaporation control method of urea, one section of vapor seperator urine outlet temperature, one section of evaporator vacuum are become
The vacuum-pressure signal for sending device to detect is sent into one section of evaporation urine concentration controller, one section of evaporation urine concentration controller and set
One section of evaporation outlet urine concentration computing module is equipped with, one section of evaporation outlet urine concentration computing module is believed according to temperature and pressure
Number urine concentration value is calculated, the concentration value calculated send DCS control systems, the output of DCS control systems is used as one section of evaporator
The Setting signal of concentration bunch grade adjustment device, measures one section of evaporation outlet vacuum transducer signal and delivers to one section of evaporator concentration string
The measurement end of level adjuster, constitutes urine concentration loop in series, controls the aperture of one section of evaporator vacuum pressure-regulating valve.
It is preferred that, in the manually operated one section of evaporation outlet temperature series adjustment device of DCS control systems,
One section of evaporation is exported into temperature series adjustment device after steam pressure is stable and throws " automatic ", is just now single regulation
Device；
When primary evaporator heater steam pressure transmitter pressure rise, temperature series adjustment device is exported by one section of evaporation
Regulation, primary evaporator heater steam pressure regulating valve is turned down；
When the reduction of primary evaporator heater steam pressure transmitter pressure, temperature series adjustment device is exported by one section of evaporation
Regulation, primary evaporator heater steam pressure regulating valve is opened greatly；
When throwing " tandem ", one section of evaporation outlet temperature rise, is adjusted by one section of evaporating temperature bunch grade adjustment device, by one
Section evaporation heater steam pressure regulating valve is turned down；One section of evaporation outlet temperature reduction, passes through one section of evaporating temperature bunch grade adjustment
Device is adjusted, and primary evaporator heater steam pressure regulating valve is opened greatly.
It is preferred that, one section of evaporation outlet urine concentration controller is arranged on one section of vapor seperator side, one section
Evaporation outlet urine concentration controller, one section of evaporator vacuum transmitter, one section of evaporator vacuum pressure-regulating valve composition
Concentration bunch grade adjustment loop；
It is dense that one section of vapor seperator urine outlet temperature, one section of vapor seperator vacuum signal send into one section of evaporation urine
Controller is spent, one section of evaporation urine concentration controller is interior to calculate concentration by one section of evaporation outlet urine concentration computing module
Value, the concentration value signal that one section of evaporation outlet urine concentration computing module is calculated send DCS control systems；
When one section of evaporation outlet vacuum pressure rise, adjusted by one section of evaporator concentration bunch grade adjustment device, by one section
Evaporator vacuum pressure-regulating valve is turned down vacuum degree control at 35KPa (A)；
Now one section of evaporation outlet temperature reduction, exports temperature series adjustment device by one section of evaporation and adjusts, by one section of steaming
Hair heater steam pressure-regulating valve is opened greatly；One section of evaporation is exported into temperature control at 130 DEG C；
Manually operated one section of evaporator concentration bunch grade adjustment device in DCS operating systems, when one section of evaporation outlet vacuum pressure
Power transmitter stablizes latter section of evaporator concentration bunch grade adjustment device and throws " automatic ", and one section of evaporation urine concentration controller throws " string
Level ", constitutes complicated loop in series；Now complicated loop in series life's work；
It is dense by one section of evaporation urine when the concentration that one section of evaporation outlet urine concentration computing module is calculated is less than 95%
Controller regulation is spent, one section of evaporator vacuum pressure-regulating valve acts, regulating valve is opened greatly therewith；
This section evaporation outlet temperature reduction, exports temperature series adjustment device by one section of evaporation and adjusts, by one section of evaporation
Heater steam pressure-regulating valve is opened greatly.
The beneficial effects of the invention are as follows：The present invention provides a kind of new by obtaining one section of evaporation urine concentration indirectly
Method and system.The CO that the present invention is built with the same period2Stripping subtraction unit is compared, and can reduce investment outlay more than 30%, steam consumption drop
To 905 kg/ton.The present invention is safe, more reliable and more stable；Easy to operate, control is simple, automaticity is high.
Brief description of the drawings
Fig. 1 is present system structural representation；
In figure, mono- section of evaporator vacuum pressure-regulating valve of 1-, mono- section of evaporator concentration bunch grade adjustment device of 2-, mono- section of 3-
Evaporate urine concentration controller, mono- section of evaporator vacuum transmitter of 4-, mono- section of evaporation outlet temperature series adjustment device of 5-, 6- mono-
Section evaporation outlet thermocouple thermometer, 7- primary evaporator heater steam pressure transmitters, 8- primary evaporator heater steam
Pressure-regulating valve, 9- primary evaporator heaters, mono- section of vapor seperator of 10-.
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to
It is as described below.
As shown in figure 1, in figure, A represents that one section of evaporator separator vacuumizes Trunk Line, and B represents primary evaporator heater
Steam inlet Trunk Line, C represents one section of evaporator separator outlet Trunk Line, and D represents liquid pump Trunk Line.
One section of evaporative concn control system of urea, it includes one section of vapor seperator 10, connected with one section of vapor seperator 10
The primary evaporator heater 9 that connects, Trunk Line, one section of evaporation urine concentration controller 3, one section of evaporation outlet thermocouple thermometer 6,
Primary evaporator heater steam pressure regulating valve 8, one section of evaporation outlet temperature series adjustment device 5, primary evaporator heater steam
Pressure transmitter 7, one section of evaporator vacuum transmitter 4, one section of evaporator concentration bunch grade adjustment device 2, one section of evaporator vacuum
Spend pressure-regulating valve 1 and control system；
One section of described evaporation urine concentration controller 3 is installed to be easy to watch, grasps by one section of vapor seperator 10 at the scene
Make or one section of evaporation urine concentration controller 3 is the One function module inside control system；Monitoring temperature, pressure are simultaneously transported
Calculate, output signal to control system；
Described control system is DCS control systems；
Described Trunk Line vacuumizes supervisor including one section of evaporator separator outlet Trunk Line, one section of evaporator separator
Line, the steam inlet Trunk Line of primary evaporator heater 9 and liquid pump Trunk Line；The steam inlet Trunk Line of primary evaporator heater 9, liquid
Pump Trunk Line is connected with primary evaporator heater 9 respectively, one section of evaporator separator outlet Trunk Line, one section of evaporator separator
Trunk Line is vacuumized to connect with one section of vapor seperator 10 respectively；
Primary evaporator heater steam pressure regulating valve 8 is provided with the steam inlet Trunk Line of primary evaporator heater 9；
Primary evaporator heater steam pressure transmitter 7 be arranged on the steam inlet Trunk Line of primary evaporator heater 9 or
On person's primary evaporator heater 9；
One section of evaporation outlet thermocouple thermometer 6 is provided with one section of evaporator separator outlet Trunk Line；
One section of evaporator separator, which is vacuumized, is provided with one section of evaporator vacuum pressure-regulating valve 1 on Trunk Line；
One section of evaporator vacuum transmitter 4 is provided with one section of vapor seperator 10；
Primary evaporator heater steam pressure regulating valve 7, primary evaporator heater steam pressure transmitter 7 and one section of evaporation
Exit thermocouple thermometer 6 is electrically connected with one section of evaporation outlet temperature series adjustment device 5 respectively；
One section of evaporator concentration bunch grade adjustment device 2 respectively with one section of evaporator vacuum pressure-regulating valve 1, one section of evaporator
Vacuum transmitter 4 and one section of evaporation urine concentration controller 3 are connected；One section of evaporation urine concentration controller 3 is also respectively connected with
One section of evaporator vacuum transmitter 4 and one section of evaporation outlet thermocouple thermometer 6.
Preferably, one section of evaporation outlet urine concentration controller is arranged on one section of side of vapor seperator 10, described one
Display screen is provided with section evaporation urine concentration controller 3, display screen is used for displays temperature, pressure etc..
Preferably, the temperature that the length of Φ 14 is 300mm is installed in perforate on the one section of outlet of vapor seperator 10 Trunk Line
Protecting pipe is spent, the length of one section of evaporation outlet thermocouple thermometer 6 is consistent with the length of thermometric protecting pipe；One section of evaporation outlet heat
Temperature signal is accessed one section of evaporation urine concentration control by dipole thermometer 6 using three one group I grades of E type thermocouple thermometers
Device 3 processed.
Preferably, described primary evaporator heater steam pressure transmitter 7 is arranged on primary evaporator heater 9,
A stop valve is installed in the top perforate of primary evaporator heater 9, and introducing primary evaporator heater with the stainless steel pressure guiding pipes of Φ 14 steams
The positive pressure side of vapour pressure power transmitter 7, DCS control systems are delivered to by transducer signal.
Preferably, one section of described evaporator vacuum transmitter 4 is arranged on one section of top of vapor seperator 10, at one section
The top drilling of vapor seperator 10 installs a stop valve, and one section of evaporator vacuum pick-up is introduced with the stainless steel pressure guiding pipes of Φ 14
The positive pressure side of device 4, negative pressure is detected using absolute pressure gauge, and transducer signal is delivered into one section of evaporation urine concentration controller 3.
One section of evaporation control method of urea, by one section of the urine outlet temperature of vapor seperator 10, one section of evaporator vacuum
The vacuum-pressure signal that transmitter 4 is detected sends into one section of evaporation urine concentration controller 3, one section of evaporation urine concentration controller
Be provided with one section of evaporation outlet urine concentration computing module in 3, one section of evaporation outlet urine concentration computing module according to temperature and
Pressure signal calculates urine concentration value, and the concentration value calculated send DCS control systems, and the output of DCS control systems is used as one section
The Setting signal of evaporator concentration bunch grade adjustment device 2, measures one section of evaporation outlet vacuum transducer signal and delivers to one section of evaporation
The measurement end of device concentration bunch grade adjustment device 2, constitutes urine concentration loop in series, controls one section of evaporator vacuum pressure-regulating valve
1 aperture.
Preferably, in the manually operated one section of evaporation outlet temperature series adjustment device 5 of DCS control systems,
One section of evaporation is exported into temperature series adjustment device 5 after steam pressure is stable and throws " automatic ", is now just adjusted to be single
Save device；
When the pressure rise of primary evaporator heater steam pressure transmitter 7, temperature series adjustment is exported by one section of evaporation
Device 5 is adjusted, and primary evaporator heater steam pressure regulating valve 8 is turned down；
When the reduction of the pressure of primary evaporator heater steam pressure transmitter 7, temperature series adjustment is exported by one section of evaporation
Device 5 is adjusted, and primary evaporator heater steam pressure regulating valve 8 is opened greatly；
When throwing " tandem ", one section of evaporation outlet temperature rise, is adjusted by one section of evaporating temperature bunch grade adjustment device, by one
Section evaporation heater steam pressure regulating valve 8 is turned down；One section of evaporation outlet temperature reduction, passes through one section of evaporating temperature bunch grade adjustment
Device is adjusted, and primary evaporator heater steam pressure regulating valve 8 is opened greatly.
Preferably, one section of evaporation outlet urine concentration controller is arranged on one section of side of vapor seperator 10, one section of evaporation
Outlet urine concentration controller, one section of evaporator vacuum transmitter 4, one section of evaporator vacuum pressure-regulating valve 1 constitute dense
Spend bunch grade adjustment loop；
One section of urine outlet temperature of vapor seperator 10, one section of vacuum signal of vapor seperator 10 send into one section of evaporation urine
Urine concentration computing module is exported in liquid consistency controller 3, one section of evaporation urine concentration controller 3 by one section of evaporation to calculate
Concentration value, the concentration value signal that one section of evaporation outlet urine concentration computing module is calculated send DCS control systems；
When one section of evaporation outlet vacuum pressure rise, adjusted by one section of evaporator concentration bunch grade adjustment device 2, by one section
Evaporator vacuum pressure-regulating valve 1 is turned down vacuum degree control at 35KPa (A)；
Now one section of evaporation outlet temperature reduction, exports temperature series adjustment device 5 by one section of evaporation and adjusts, by one section of steaming
Hair heater steam pressure-regulating valve 8 opens big；One section of evaporation is exported into temperature control at 130 DEG C；
Manually operated one section of evaporator concentration bunch grade adjustment device 2 in DCS operating systems, when one section of evaporation outlet vacuum pressure
Power transmitter is stablized latter section of evaporator concentration bunch grade adjustment device 2 and thrown " automatic ", and one section of evaporation urine concentration controller 3 throws " string
Level ", constitutes complicated loop in series；Now complicated loop in series life's work；
It is dense by one section of evaporation urine when the concentration that one section of evaporation outlet urine concentration computing module is calculated is less than 95%
Degree controller 3 is adjusted, and one section of evaporator vacuum pressure-regulating valve 1 is acted therewith, and regulating valve is opened greatly；
This section evaporation outlet temperature reduction, exports temperature series adjustment device 5 by one section of evaporation and adjusts, by one section of evaporation
Heater steam pressure-regulating valve 8 is opened greatly.
One section of input of evaporator concentration bunch grade adjustment device 2 as one section of evaporation in vacuo degree pressure-regulating valve given letter
Number, one section of evaporation urine concentration controller 3 output control, one section of evaporation in vacuo degree pressure-regulating valve adjusts one section of evaporation outlet urine
Liquid concentration；The present invention principle be：Urine Pressure/Temperature calculates the concentration of urine with urine concentration in mathematical modeling relation.
The mathematical modeling is as follows：
A=16.2886-3816.44/ (RV1+227.02)
B=EXP (A)
C=0.94 × RV/B
D=POWER (C, 0.92498)
E=1.06425 × D
F=100 × (18.016 × E)/{ (18.016 × E)+60.056 × (1-E) }
F1=POWER (F, 2)
G=132.6-2.7085 × F+0.0058 × F1
Note：RV1:For temperature input signal
RV：For pressure input signals
G:For concentration
Temperature control and Stress control；Temperature control will measure one section of evaporator urine outlet temperature signal and deliver to one section of steaming
Mouthful measurement end of temperature series adjustment device 5 is sent, the signal of measurement primary evaporator heater steam pressure transmitter 7 delivers to one section of evaporation
The input composition temperature cascade loop of outlet temperature bunch grade adjustment device 5, control primary evaporator heater steam pressure regulating valve 8
Aperture；One section of evaporator urine outlet temperature, one section of evaporation outlet vacuum pressure detector signal are sent into one by Stress control
Section evaporation urine concentration controller 3, one section of evaporation urine concentration controller 3 exports urine concentration computing module by one section of evaporation
Concentration value is calculated, and outputs signal to one section of setting value end of evaporator concentration bunch grade adjustment device 2, vacuum-pressure signal delivers to one
Section evaporation urine concentration adjuster measured value end composition loop in series, controls the vacuum pressure-regulating valve of primary evaporator heater 9
Aperture.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, it is noted that all
Any modifications, equivalent substitutions and improvements made within the spirit and principles in the present invention etc., should be included in the guarantor of the present invention
Within the scope of shield.
Claims (8)
1. one section of evaporative concn control system of urea, it is characterised in that：It includes one section of vapor seperator, separated with one section of evaporation
Primary evaporator heater, Trunk Line, one section of evaporation urine concentration controller, the one section of evaporation outlet electric thermo-couple temperature of device connection
Meter, primary evaporator heater steam pressure regulating valve, one section of evaporation outlet temperature series adjustment device, primary evaporator heater steam
Pressure transmitter, one section of evaporator vacuum transmitter, one section of evaporator concentration bunch grade adjustment device, one section of evaporator vacuum pressure
Force regulating valve and control system；
One section of described evaporation urine concentration controller is installed by one section of vapor seperator at the scene or one section of evaporation urine is dense
It is the One function module inside control system to spend controller；Monitoring temperature, pressure union, output signal to control system；
Described control system is DCS control systems；
Described Trunk Line include one section of evaporator separator outlet Trunk Line, one section of evaporator separator vacuumize Trunk Line,
Primary evaporator heater steam inlet Trunk Line and liquid pump Trunk Line；Primary evaporator heater steam inlet Trunk Line, liquid pump master
Pipeline is connected with primary evaporator heater respectively, and one section of evaporator separator outlet Trunk Line, one section of evaporator separator are taken out very
Empty Trunk Line is connected with one section of vapor seperator respectively；
Primary evaporator heater steam pressure regulating valve is provided with primary evaporator heater steam inlet Trunk Line；
Primary evaporator heater steam pressure transmitter is arranged on primary evaporator heater steam inlet Trunk Line or one section
On evaporation heater；
One section of evaporation outlet thermocouple thermometer is provided with one section of evaporator separator outlet Trunk Line；
One section of evaporator separator, which is vacuumized, is provided with one section of evaporator vacuum pressure-regulating valve on Trunk Line；
One section of evaporator vacuum transmitter is provided with one section of vapor seperator；
Primary evaporator heater steam pressure regulating valve, primary evaporator heater steam pressure transmitter and one section of evaporation outlet heat
Dipole thermometer is electrically connected with one section of evaporation outlet temperature series adjustment device respectively；
One section of evaporator concentration bunch grade adjustment device respectively with one section of evaporator vacuum pressure-regulating valve, one section of evaporator vacuum
Transmitter and one section of evaporation urine concentration controller connection；One section of evaporation urine concentration controller is also respectively connected with one section of evaporator
Vacuum transmitter and one section of evaporation outlet thermocouple thermometer.
2. one section of evaporative concn control system of urea according to claim 1, it is characterised in that：One section of evaporation outlet urine
Consistency controller is arranged on one section of vapor seperator side, one section of described evaporation urine concentration controller and is provided with display
Screen.
3. one section of evaporative concn control system of urea according to claim 2, it is characterised in that：In one section of vapor seperator
Export perforate on Trunk Line and the temperature protecting pipe that piece length of Φ 14 is 300mm, one section of evaporation outlet thermocouple thermometer are installed
Length it is consistent with the length of thermometric protecting pipe；One section of evaporation outlet thermocouple thermometer is using three one group I grades of E indexing thermoelectricity
Even thermometer, one section of evaporation urine concentration controller is accessed by temperature signal.
4. one section of evaporative concn control system of urea according to claim 3, it is characterised in that：One section of described evaporation adds
Hot device steam pressure transmitter is arranged on primary evaporator heater, and on primary evaporator heater top, a cut-off is installed in perforate
Valve, the positive pressure side of primary evaporator heater steam pressure transmitter is introduced with the stainless steel pressure guiding pipes of Φ 14, transducer signal is sent
To DCS control systems.
5. one section of evaporative concn control system of urea according to claim 4, it is characterised in that：One section of described evaporator
Vacuum transmitter is arranged at the top of one section of vapor seperator, and a stop valve is installed in one section of vapor seperator top drilling,
The positive pressure side of one section of evaporator vacuum transmitter is introduced with the stainless steel pressure guiding pipes of Φ 14, negative pressure is detected using absolute pressure gauge, will be become
Device signal is sent to deliver to one section of evaporation urine concentration controller.
6. the control method of control system as claimed in claim 1 or 2 or 3 or 4, it is characterised in that：By one section of vapor seperator
The vacuum-pressure signal that urine outlet temperature, one section of evaporator vacuum transmitters sense are arrived sends into one section of evaporation urine concentration control
One section of evaporation outlet urine concentration computing module, one section of evaporation outlet are provided with device processed, one section of evaporation urine concentration controller
Urine concentration computing module goes out urine concentration value according to temperature and pressure signal of change, and the concentration value calculated send DCS controls system
System, DCS control systems export the Setting signal as one section of evaporator concentration bunch grade adjustment device, measure one section of evaporation outlet vacuum
Degree transducer signal delivers to the measurement end of one section of evaporator concentration bunch grade adjustment device, constitutes urine concentration loop in series, control one
The aperture of section evaporator vacuum pressure-regulating valve.
7. the control method of control system as claimed in claim 6, it is characterised in that：Manually operated one section in DCS control systems
Evaporation outlet temperature series adjustment device,
One section of evaporation is exported into temperature series adjustment device after steam pressure is stable and throws " automatic ", is just now single adjuster；
When primary evaporator heater steam pressure transmitter pressure rise, temperature series adjustment device is exported by one section of evaporation and adjusted
Section, primary evaporator heater steam pressure regulating valve is turned down；
When the reduction of primary evaporator heater steam pressure transmitter pressure, temperature series adjustment device is exported by one section of evaporation and adjusted
Section, primary evaporator heater steam pressure regulating valve is opened greatly；
When throwing " tandem ", one section of evaporation outlet temperature rise, is adjusted by one section of evaporating temperature bunch grade adjustment device, by one section of steaming
Hair heater steam pressure-regulating valve is turned down；One section of evaporation outlet temperature reduction, is adjusted by one section of evaporating temperature bunch grade adjustment device
Section, primary evaporator heater steam pressure regulating valve is opened greatly.
8. one section of evaporative concn control method of urea according to claim 6, it is characterised in that：One section of evaporation outlet urine
Consistency controller is arranged on one section of vapor seperator side, one section of evaporation outlet urine concentration controller, one section of evaporator vacuum
Spend transmitter, one section of evaporator vacuum pressure-regulating valve composition concentration bunch grade adjustment loop；
One section of vapor seperator urine outlet temperature, one section of vapor seperator vacuum signal send into one section of evaporation urine concentration control
Urine concentration computing module is exported by one section of evaporation in device processed, one section of evaporation urine concentration controller and calculates concentration value, one
The concentration value signal that section evaporation outlet urine concentration computing module is calculated send DCS control systems；
When one section of evaporation outlet vacuum pressure rise, adjusted by one section of evaporator concentration bunch grade adjustment device, by one section of evaporation
Device vacuum pressure-regulating valve is turned down vacuum degree control at 35KPa (A)；
Now one section of evaporation outlet temperature is reduced, and exporting temperature series adjustment device by one section of evaporation is adjusted, and one section of evaporation is added
Hot device steam pressure regulating valve is opened greatly；One section of evaporation is exported into temperature control at 130 DEG C；
Manually operated one section of evaporator concentration bunch grade adjustment device in DCS operating systems, when one section of evaporation outlet vacuum pressure becomes
Send device to stablize latter section of evaporator concentration bunch grade adjustment device and throw " automatic ", one section of evaporation urine concentration controller throws " tandem ", structure
Into complicated loop in series；Now complicated loop in series life's work；
When the concentration that one section of evaporation outlet urine concentration computing module is calculated is less than 95%, pass through one section of evaporation urine concentration control
Device regulation processed, one section of evaporator vacuum pressure-regulating valve acts, regulating valve is opened greatly therewith；
This section evaporation outlet temperature reduction, exports temperature series adjustment device by one section of evaporation and adjusts, one section of evaporation is heated
Device steam pressure regulating valve is opened greatly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710724273.4A CN107286058B (en) | 2017-08-22 | 2017-08-22 | Urea first-stage evaporation control system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710724273.4A CN107286058B (en) | 2017-08-22 | 2017-08-22 | Urea first-stage evaporation control system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107286058A true CN107286058A (en) | 2017-10-24 |
| CN107286058B CN107286058B (en) | 2023-04-18 |
Family
ID=60106739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710724273.4A Active CN107286058B (en) | 2017-08-22 | 2017-08-22 | Urea first-stage evaporation control system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107286058B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112007370A (en) * | 2020-09-23 | 2020-12-01 | 内蒙古通威高纯晶硅有限公司 | Material concentration control system and method |
| CN114681935A (en) * | 2020-12-28 | 2022-07-01 | 攀枝花恒通钛业有限公司 | Automatic control process for concentration of low-concentration titanium liquid |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1749242A (en) * | 2005-08-03 | 2006-03-22 | 四川泸天化股份有限公司 | Method for concentrating thin urine using falling film type evaporation heater |
| CN101239268A (en) * | 2008-03-21 | 2008-08-13 | 李洪林 | Method and device for recovering dust of urea granulation |
| CN201525815U (en) * | 2009-09-30 | 2010-07-14 | 宁波金远东工业科技有限公司 | Device for preparing urea by utilizing aqueous solution total recycle process |
| CN101991962A (en) * | 2009-08-21 | 2011-03-30 | 宁波金远东工业科技有限公司 | Low-energy consumption urea evaporator |
| CN104402769A (en) * | 2014-12-04 | 2015-03-11 | 重庆建峰化工股份有限公司 | Production process for Adblue |
| CN104829494A (en) * | 2015-05-27 | 2015-08-12 | 四川金象赛瑞化工股份有限公司 | Energy-saving urea production system and production process thereof |
| CN205084428U (en) * | 2015-11-06 | 2016-03-16 | 上海中腾环保科技有限公司 | A MVR evaporimeter for urea solution cryoconcentration |
| CN205307829U (en) * | 2015-12-03 | 2016-06-15 | 中化重庆涪陵化工有限公司 | Energy -conserving urea vaporization system |
-
2017
- 2017-08-22 CN CN201710724273.4A patent/CN107286058B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1749242A (en) * | 2005-08-03 | 2006-03-22 | 四川泸天化股份有限公司 | Method for concentrating thin urine using falling film type evaporation heater |
| CN101239268A (en) * | 2008-03-21 | 2008-08-13 | 李洪林 | Method and device for recovering dust of urea granulation |
| CN101991962A (en) * | 2009-08-21 | 2011-03-30 | 宁波金远东工业科技有限公司 | Low-energy consumption urea evaporator |
| CN201525815U (en) * | 2009-09-30 | 2010-07-14 | 宁波金远东工业科技有限公司 | Device for preparing urea by utilizing aqueous solution total recycle process |
| CN104402769A (en) * | 2014-12-04 | 2015-03-11 | 重庆建峰化工股份有限公司 | Production process for Adblue |
| CN104829494A (en) * | 2015-05-27 | 2015-08-12 | 四川金象赛瑞化工股份有限公司 | Energy-saving urea production system and production process thereof |
| CN205084428U (en) * | 2015-11-06 | 2016-03-16 | 上海中腾环保科技有限公司 | A MVR evaporimeter for urea solution cryoconcentration |
| CN205307829U (en) * | 2015-12-03 | 2016-06-15 | 中化重庆涪陵化工有限公司 | Energy -conserving urea vaporization system |
Non-Patent Citations (3)
| Title |
|---|
| 刘立群等: "尿素真空蒸发控制的改造", 《大氮肥》 * |
| 厉桂萍: "尿素装置复杂控制系统简析与仪表调试", 《机械》 * |
| 陈令强: "年产4万吨尿素装置自控通用设计的改进", 《炼油化工自动化》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112007370A (en) * | 2020-09-23 | 2020-12-01 | 内蒙古通威高纯晶硅有限公司 | Material concentration control system and method |
| CN114681935A (en) * | 2020-12-28 | 2022-07-01 | 攀枝花恒通钛业有限公司 | Automatic control process for concentration of low-concentration titanium liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107286058B (en) | 2023-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109855925B (en) | High-temperature high-pressure high-steam concentration aerosol on-line measuring device with calibration function | |
| CN107286058A (en) | One section of evaporation control system of urea and method | |
| RU2380694C1 (en) | Method of determining dryness factor of wet steam | |
| CN105795502A (en) | Redrying feeding and flavoring material moisture content and temperature controlling method | |
| CN109855924B (en) | On-line detection system for severe environment aerosol | |
| CN208634792U (en) | A kind of steam pipe line stable-pressure device | |
| CN104198326A (en) | Flowing wet steam wetness measuring system and method | |
| CN101825342A (en) | Water temperature control method of instant heating type electromagnetic induction water heater | |
| CN104793638A (en) | Threshing and pneumatic separating intelligent tracking control method | |
| CN104034377A (en) | Air compressor flow measurement device and calibration system and method thereof | |
| CN106805282A (en) | A kind of method for controlling water content of chimneying formula dried material | |
| CN207143159U (en) | One section of evaporation control system of urea | |
| CN103412097B (en) | The pick-up unit of a kind of VOC and burst size of methanal and detection method thereof | |
| CN207096828U (en) | Urea evaporation concentration control system | |
| CN107300933A (en) | urea evaporation concentration control system and method | |
| CN205449849U (en) | Online moisture in steam measures and calibration system | |
| CN110848657B (en) | Device and method for controlling moisture content of steam for drying | |
| CN201935528U (en) | Vacuum drying device | |
| CN203786069U (en) | Device for measuring effluent rate of vacuum drying treatment material | |
| CN100403015C (en) | Exhausting humidity on-line monitor for steam turbine | |
| CN103439465B (en) | A kind of burst size of methanal analytic approach detection system and detection method thereof | |
| CN108802091A (en) | A kind of analysis experimental provision of material Airflow Drying Characteristic variation | |
| CN108704329A (en) | A kind of metal caesium or the canned system and device of rubidium molecular distillation and technological process | |
| CN213939698U (en) | Dry end and dry tail treatment system of tobacco cut-tobacco drier | |
| CN211292702U (en) | Oxygen analyzer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |