CN206872431U - Phosphoric Acid Concentration vapor (steam) temperature automatic control system - Google Patents
Phosphoric Acid Concentration vapor (steam) temperature automatic control system Download PDFInfo
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- CN206872431U CN206872431U CN201720790998.9U CN201720790998U CN206872431U CN 206872431 U CN206872431 U CN 206872431U CN 201720790998 U CN201720790998 U CN 201720790998U CN 206872431 U CN206872431 U CN 206872431U
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Abstract
Phosphoric Acid Concentration vapor (steam) temperature automatic control system, including：Steam control valve D1, water regulating valve D2, pressure transmitter H1, temperature sensor T, motor-driven valve D3, electric control valve D4.The pressure transmitter H1, steam control valve D1, power supply L, N connection, form the first control subsystem.The water regulating valve D2, temperature sensor T, power supply L, N connection, form the second control subsystem.Electric control valve D4, digital display controller SWP, auxiliary reclay J, power supply L, N connection, form the 3rd control subsystem.The utility model provides a kind of Phosphoric Acid Concentration vapor (steam) temperature automatic control system, and effectively controlling reduced vapor pressure, temperature control is at 120 ± 5 DEG C between 0.48 ~ 0.52；And control process is safe and reliable.
Description
Technical field
A kind of Phosphoric Acid Concentration vapor (steam) temperature automatic control system of the utility model, is related to composite fertilizer's manufacturing process area.
Background technology
In Phosphoric Acid Concentration system of the prior art, the low-pressure steam pressure of Phosphoric Acid Concentration battery limit (BL) is generally entered
200 ~ 240 DEG C of 0.6Mpa, temperature.According to concentration control technic index requirement, into the low-pressure steam pressure of concentration graphite heat exchanger
Power should be reduced to 0.18~0.21MPa, and temperature is 127~133 DEG C.Existing pressure and temperature reducing mode needs desalted water is straight
Connect in the steam being sprayed onto in reducing-and-cooling plant.Steam pressure is controlled by regulating loop, but of the prior art
Regulating loop is excessively single, and the pressure for steam, temperature are not controlled accurately.If it is too high steam pressure occur, surpass
Peracid heat exchanger graphite tubulation pressure voltage, graphite tubulation can be caused to damage；Larger potential safety hazard be present simultaneously.And steam pressure
Too low, band water is serious, can equally impact graphite tubulation, graphite tubulation is damaged.Likewise, vapor (steam) temperature is also to pass through tune
Section loop modulation is added to steam temperature reducing/decompression facility and is controlled, and temperature is too high, the too low technique for all not reaching Phosphoric Acid Concentration
It is required that and graphite tubulation can be damaged.In addition, Phosphoric Acid Concentration steam temperature reducing/pressure reducing mode in the prior art, easily causes steam wave
Take, so as to increase the cost of manufacturing process.Therefore a kind of Phosphoric Acid Concentration vapor (steam) temperature automatic control system of exploitation, it is currently to solve
Technical problem certainly.
The content of the invention
In order to solve the above technical problems, the utility model provides a kind of Phosphoric Acid Concentration vapor (steam) temperature automatic control system, energy
Effectively control reduced vapor pressure is between 0.48 ~ 0.52, and temperature control is at 120 ± 5 DEG C；And control process is safe and reliable.
The technical scheme that the utility model is taken is：
Phosphoric Acid Concentration vapor (steam) temperature automatic control system, the system include：
Steam control valve D1, for 0.6 ~ 0.8MPa steam pressures to be adjusted to 0.5MPa；
Water regulating valve D2, for controlling surge tank inflow；
Pressure transmitter H1, for detecting the steam pressure into surge tank；
Temperature sensor T, for detecting surge tank inflow temperature；
Motor-driven valve D3, is used as atmospheric valve；
Electric control valve D4, for adjusting heater steam uninterrupted；
The steam control valve D1 is arranged on steam inlet duct, water regulating valve D2 is arranged on water inlet pipe, the steam
Air inlet pipe, water inlet pipe are all connected with temperature-decreased pressure reducer, and temperature-decreased pressure reducer connects surge tank by shower, set on the shower
Pressure transmitter H1, temperature sensor T.
The surge tank connects heater by heating tube, and electric control valve D4 is arranged in the heating tube.
The pressure transmitter H1, steam control valve D1, power supply L, N connection, form the first control subsystem；
The water regulating valve D2, temperature sensor T, power supply L, N connection, form the second control subsystem；
Electric control valve D4, digital display controller SWP, auxiliary reclay J, power supply L, N connection, form the 3rd control subsystem
System.
First control subsystem, the second control subsystem are PID control system, and the PID control system includes
PID controller.Pressure transmitter H1, steam control valve D1 the first PID controllers of connection；
Water regulating valve D2, temperature sensor T the second PID controllers of connection.
The surge tank is provided with safety valve H2, for overpressure protection.
The contact J-1 both ends of the auxiliary reclay J are connected in parallel hand switch K.
A kind of Phosphoric Acid Concentration vapor (steam) temperature automatic control system of the utility model, by pid control mode, realizes vapour pressure
Power, vapor (steam) temperature closed-loop control；Safety valve H2 possesses overpressure protection function simultaneously；K is operated with manual switches simultaneously, reserves behaviour manually
Work energy.The system can effectively control reduced vapor pressure, and temperature control is at 120 ± 5 DEG C between 0.48 ~ 0.52；And control
Process safety processed is reliable.
Brief description of the drawings
Fig. 1 is Tthe utility model system device connection diagram.
Fig. 2 is the control schematic diagram of Tthe utility model system.
Embodiment
As shown in Figure 1 and Figure 2, Phosphoric Acid Concentration vapor (steam) temperature automatic control system, the system include：
Steam control valve D1, for 0.6 ~ 0.8MPa steam pressures to be adjusted to 0.5MPa.
Water regulating valve D2, for controlling surge tank b inflows.
Pressure transmitter H1, for detecting the steam pressure into surge tank b.
Temperature sensor T, for detecting surge tank b inflow temperatures.
Motor-driven valve D3, is used as atmospheric valve.
Electric control valve D4, for adjusting heater c steam flow sizes.
The steam control valve D1 is arranged on steam inlet duct, water regulating valve D2 is arranged on water inlet pipe, the steam
Air inlet pipe, water inlet pipe are all connected with temperature-decreased pressure reducer a, and temperature-decreased pressure reducer a connects surge tank b by shower, on the shower
Pressure transmitter H1, temperature sensor T are set.；
The surge tank b connects heater c by heating tube, and electric control valve D4 is arranged in the heating tube.
The pressure transmitter H1, steam control valve D1, power supply L, N connection, form the first control subsystem；
The water regulating valve D2, temperature sensor T, power supply L, N connection, form the second control subsystem；
Electric control valve D4, digital display controller SWP, auxiliary reclay J, power supply L, N connection, form the 3rd control subsystem
System.
First control subsystem, the second control subsystem are PID control system, and the PID control system includes
PID controller.Pressure transmitter H1, steam control valve D1 the first PID controllers of connection.Water regulating valve D2, temperature sensor T connect
Connect the second PID controller.
The surge tank b is provided with safety valve H2, for overpressure protection.
The contact J-1 both ends of the auxiliary reclay J are connected in parallel hand switch K.
Implementation steps：
0.6`0.8MPa steam is responsible for, is detected by pressure transmitter H1, passes through PID control, control steam control valve D1
Steam pressure is adjusted to 0.5MPa.Temperature sensor T is controlled water regulating valve D2, is controlled injection flow rate, will sprayed by PID control
Coolant-temperature gage is controlled at 120 ± 5 DEG C.Surge tank b is provided with pressure detecting safety valve H2, for overpressure protection.Motor-driven valve D3 is emptying
Valve, electric control valve D4 regulation heater c steam flow sizes, when heater c pressure reaches 0.52 MPa, digital display controller
SWP upper limit alarms, auxiliary reclay J actions, contact J-I closures, motor-driven valve D3 open discharge steam；Heater c pressure is less than
During 0.48 MPa, auxiliary reclay J contact J-I disconnections, contact J-2 closures, motor-driven valve D3 are closed.
Claims (4)
1. Phosphoric Acid Concentration vapor (steam) temperature automatic control system, it is characterised in that the system includes：
Steam control valve D1, for 0.6 ~ 0.8MPa steam pressures to be adjusted to 0.5MPa；
Water regulating valve D2, for controlling surge tank（b）Inflow；
Pressure transmitter H1, enter surge tank for detecting（b）Steam pressure；
Temperature sensor T, for detecting surge tank（b）Inflow temperature；
Motor-driven valve D3, is used as atmospheric valve；
Electric control valve D4, for adjusting heater（c）Steam flow size；
The steam control valve D1 is arranged on steam inlet duct, water regulating valve D2 is arranged on water inlet pipe, the steam inlet
Pipe, water inlet pipe are all connected with temperature-decreased pressure reducer（a）, temperature-decreased pressure reducer（a）Surge tank is connected by shower（b）, the shower
Upper setting pressure transmitter H1, temperature sensor T；
The surge tank（b）Heater is connected by heating tube（c）, electric control valve D4 is in the heating tube；
The pressure transmitter H1, steam control valve D1, power supply L, N connection, form the first control subsystem；
The water regulating valve D2, temperature sensor T, power supply L, N connection, form the second control subsystem；
Electric control valve D4, digital display controller SWP, auxiliary reclay J, power supply L, N connection, form the 3rd control subsystem.
2. Phosphoric Acid Concentration vapor (steam) temperature automatic control system according to claim 1, it is characterised in that：First control
System, the second control subsystem are PID control system, and the PID control system includes PID controller；Pressure transmitter H1,
Steam control valve D1 the first PID controllers of connection；Water regulating valve D2, temperature sensor T the second PID controllers of connection.
3. Phosphoric Acid Concentration vapor (steam) temperature automatic control system according to claim 1, it is characterised in that：The surge tank（b）
Safety valve H2 is provided with, for overpressure protection.
4. Phosphoric Acid Concentration vapor (steam) temperature automatic control system according to claim 1, it is characterised in that：The auxiliary reclay
J contact J-1 both ends are connected in parallel hand switch K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720790998.9U CN206872431U (en) | 2017-07-03 | 2017-07-03 | Phosphoric Acid Concentration vapor (steam) temperature automatic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720790998.9U CN206872431U (en) | 2017-07-03 | 2017-07-03 | Phosphoric Acid Concentration vapor (steam) temperature automatic control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206872431U true CN206872431U (en) | 2018-01-12 |
Family
ID=61331862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720790998.9U Active CN206872431U (en) | 2017-07-03 | 2017-07-03 | Phosphoric Acid Concentration vapor (steam) temperature automatic control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206872431U (en) |
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2017
- 2017-07-03 CN CN201720790998.9U patent/CN206872431U/en active Active
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