CN102103383A - Temperature control device of reactor in supercritical water processing system and control method thereof - Google Patents
Temperature control device of reactor in supercritical water processing system and control method thereof Download PDFInfo
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- CN102103383A CN102103383A CN2009102484624A CN200910248462A CN102103383A CN 102103383 A CN102103383 A CN 102103383A CN 2009102484624 A CN2009102484624 A CN 2009102484624A CN 200910248462 A CN200910248462 A CN 200910248462A CN 102103383 A CN102103383 A CN 102103383A
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Abstract
The invention relates to a temperature control device of a reactor in a supercritical water processing system and a control method thereof. In the temperature control device provided by the invention, the collection signal input end of a control unit is connected with a temperature transmitter at the top of the reactor in the supercritical water processing system, and the output end of the control unit is connected to a cooling pump, an electric control valve and the control loop of a heater; and the electric control valve is arranged in the outlet position of the cooling pump. The method provided by the invention comprises the following steps: initializing the device and setting the temperature control value of the reactor and the PID (piping and instruments diagram) parameters of the electric control valve; when the temperature of the collection reactor of the control unit is not higher than a set value, carrying out a PID operation and outputting control signals, thereby reducing the inflowing flow of cooling water in the reactor; and if the temperature of the reactor is lower than the set value and the inflowing flow of the cooling water in the reactor is zero, outputting the control signals, thereby enhancing the heating efficiency of the heater; and returning to judge whether the temperature of the reactor is higher than the set value or not. The temperature control device and control method provided by the invention solve the problems of slow response of a temperature loop and difficulty in setting of control parameters, do not need to establish a mathematical model of the controlled temperature and have the advantages of stronger flexibility and adaptability.
Description
Technical field
The present invention relates to the supercritical water treatment equipment technical field, a kind of specifically super critical water treatment system temperature of reactor control device and control method thereof.
Background technology
Supercritical water be meant temperature and pressure all be higher than its critical point (T=374.15 ℃, the water of special state P=22.12MPa).The supercritical water treatment technology is that to utilize supercritical water all be the special nature of good solvent to organism and oxygenant, under the prerequisite that the varying number oxygenant is provided, organism carries out homogeneous reaction in supercritical water environment, rapidly, fully, up hill and dale the organic constitution degree of depth is destroyed, change into harmless CO
2, H
2(do not add or add on a small quantity under the condition of oxygenant) and H
2The micromolecular compound that O etc. are harmless, inorganic salts are separated easily.The supercritical water treatment technology comprises supercritical water oxidation technology, supercritical water partial oxidation technology and supercritical water gasification technology, and both can be used for producing hydrogen the back.The supercritical water treatment technology has handles thorough, characteristics such as reaction rate is fast, applied range, environmental friendliness, has good development prospect.
The reaction conditions of supercritical water treatment Technology Need harshness, temperature generally will be higher than 450 ℃, and pressure generally is stabilized in about 25MPa.Complicated course of reaction takes place in waste organic matter in supercritical water, can emit a large amount of heats in the supercritical oxidation process, and need additional heat in supercritical water gasification and partial oxidation process, therefore keeps the control difficulty of temperature of reaction in the reactor.It is extremely important to the harmless treatment and the resource conversion of waste organic matter to keep stable temperature of reaction, also is simultaneously the prerequisite of the normal and safe operation of super-critical water treatment reactor.The existing mode of keeping the super-critical water treatment reactor temperature is under the prerequisite of auxiliary heating, by the fixing inlet amount of material and oxygenant.It is high that existing super-critical water treatment reactor is required the characteristic of material, narrow application range, and self automatic adjusting function is relatively poor, has influenced the reliable lasting operation of reactor.
Summary of the invention
At above shortcomings part in the prior art, the technical problem to be solved in the present invention provides the super critical water treatment system temperature of reactor control device and the control method thereof of a kind of real-time regulated of realization response device head temperature, control and the safe and reliable lasting operation of reactor automatically.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
Super critical water treatment system temperature of reactor control device of the present invention comprises control module, temperature transmitter, cooling pump, electric control valve and well heater, wherein the acquired signal input end of control module be located at critical water treatment system in the temperature transmitter of reactor head link to each other, output terminal is connected to the control loop of cooling pump, electric control valve and well heater; Described electric control valve is located at the exit of cooling pump.
Described control module comprises central processing unit, analog input unit, analog quantity output unit and digital quantity output unit, wherein central processing unit is connected to temperature transmitter by analog input unit, the output terminal of central processing unit is connected to well heater control loop, electric control valve, electric actuator and cooling pump rotating speed control loop by the analog quantity output unit, links to each other with the start and stop control loop of cooling pump and the electric actuator of electric control valve by the digital quantity output unit.
Described well heater control loop has the three-phase power adjuster, and it receives the control signal of analog quantity output unit output, and well heater is carried out Power Regulation.
Described control module is with the right form configuration of redundancy, and single operation is automaticallyed switch.
Super critical water treatment system temperature of reactor control method of the present invention may further comprise the steps:
Beginning, the temperature controlling value of reactor and the pid parameter of electric control valve are set in the device initialization;
Control module is gathered the temperature of reactor by temperature transmitter;
Whether the temperature of judging reactor is higher than setting value;
If be not higher than setting value, then control module carries out the PID computing and exports control signal, reduces the flow of inlet water of reactor cooling water;
Whether the temperature of judging reactor is lower than setting value, and whether the flow of inlet water of reactor cooling water is 0;
If the temperature of reactor is lower than setting value, and the flow of inlet water of reactor cooling water is 0, and then PID computing and export control signal increases the heating power of well heater;
Return the temperature of judging reactor and whether be higher than the setting value step;
If the temperature of reactor is lower than setting value, the flow of inlet water of reactor cooling water is to have a condition not satisfy in 0, then returns the big or small step of judging with setting value.
If the temperature of reactor is higher than setting value, then control module carries out the PID computing and exports control signal, reduces the heating power of well heater;
Whether the temperature of judging reactor that continues is higher than setting value, and whether well heater stops;
When the temperature of judging reactor is higher than setting value, and well heater starts cooling pump when stopping, and for reactor is mended into chilled water, control module carries out the PID computing simultaneously and exports control signal, increases the flow of inlet water of reactor cooling water;
When the temperature of reactor is higher than the reactor head critical temperature, the reactor overtemperature alarm;
If the temperature of reactor does not reach the reactor head critical temperature, then return the temperature of judging reactor and whether be higher than the setting value step.
If the temperature of reactor is higher than setting value, well heater has a condition not satisfy in stopping, then returns the temperature of judging reactor and whether be higher than the setting value step.
The present invention has following beneficial effect and advantage:
1. the invention solves and respond temperature loop slowly, the problem of the controlled variable of adjusting difficulty.
2. the present invention does not need to set up controlled mathematic model of temperature, and stronger dirigibility and adaptability are arranged.
Description of drawings
Fig. 1 is the control idea figure of super-critical water treatment reactor of the present invention top fluid temperature (F.T.);
Fig. 2 is a super critical water treatment system temperature of reactor control device structured flowchart of the present invention;
The control method process flow diagram that Fig. 3 adopts for apparatus of the present invention.
Embodiment
As shown in Figure 1, be the control idea figure of super-critical water treatment reactor top fluid temperature (F.T.).1 is the 1st electric control valve, and 2 is well heater, and 3 is mixer, and 4 is reactor, and 5 is refrigeratory, and 6 is counterbalance valve, and 7 is the 2nd electric control valve, and 8 is manual modulation valve, and 9 is water tank, and 10 is cooling pump, and 11 is the 3rd electric control valve, and 12 is evaporation wall water.
The workflow of super-critical water treatment reactor is as follows:
After 2 preheatings of waste organic matter material process well heater, after oxygen fully mixes in mixer 3, enter reactor 4 again and carry out desalination and reaction.Clean evaporation wall water enters reactor 4, forms one deck protectiveness moisture film at the inside surface place of porous evaporator wall, avoids the mineralization and the etching problem of reactor.Reacted clean fluid flows out from the top exit of reactor 4, after subcooler 5 coolings and counterbalance valve 6 step-downs, carries out follow-up processing procedures such as gas-liquid separation more respectively.Reacting fluid utilizes the characteristic of supercritical water to carry out desalting processing in reactor 4, and the saliferous fluid flows out by the outlet at bottom of reactor 4, carries out follow-up processing procedure again.
Start cooling pump 10, by regulating the aperture of the 2nd electric control valve 7, chilled water enters reactor 4 from water tank 9, and reactor 4 top fluid temperature (F.T.) TIC (1) are stabilized in the setting range.
The present invention is directed to super-critical water treatment reactor one cover Process Control System PCS7 is provided, real-time regulated by pid algorithm realization response device head temperature, realize control automatically, guarantee the safe and reliable lasting operation of waste organic compound supercritical water harmless treatment and recycling effect and reactor.
As shown in Figure 2, super critical water treatment system temperature of reactor control device of the present invention comprises control module, temperature transmitter TIC (1), cooling pump the 10, the 2nd electric control valve 7 and well heater 2, wherein the acquired signal input end of control module be located at critical water treatment system in the temperature transmitter TIC (1) at reactor 4 tops link to each other, output terminal is connected to the control loop of cooling pump 10, each motorized valve and well heater 2.
Described control module adopts and comprises central processing unit, analog input unit, analog quantity output unit and digital quantity output unit, wherein central processing unit is connected to temperature transmitter TIC (1) by analog input unit, output terminal is connected to well heater control loop, each motorized valve control loop and cooling pump 10 rotating speed control loops by the analog quantity output unit, the electric actuator control loop of stop valve link to each other (the valve head control loop is that analog quantity is controlled) in start and stop control loop by digital quantity output unit and cooling pump 10 and the motorized valve.
Described control module is with the right form configuration of redundancy, and single operation is automaticallyed switch.
Described well heater control loop has the three-phase power adjuster, and it receives the control signal of analog quantity output unit output, and well heater is carried out Power Regulation.
Described the 2nd electric control valve 7 is located at the exit of cooling pump 10, enters the flow of the chilled water in the reactor 4 by the aperture adjustment of regulating the 2nd electric control valve 7, and reactor 4 top fluid temperature (F.T.) TIC1 are stabilized in the setting range.
As shown in Figure 3, the control method of a kind of super critical water treatment system temperature of reactor of the present invention control device may further comprise the steps:
Beginning, the temperature controlling value of device initializing set reactor and the pid parameter of electric control valve;
Control module is gathered reactor 4 temperature by temperature transmitter TIC (1);
Whether the temperature of judging reactor 4 tops is higher than setting value;
If be not higher than setting value, then control module carries out the PID computing and exports control signal, reduces the aperture of the 2nd electric control valve 7, reduces the flow of inlet water of reactor cooling water with this;
Whether the temperature of judging reactor 4 is lower than setting value, and whether the aperture of the 2nd electric control valve 7 (flow of inlet water of reactor cooling water) is 0;
If the temperature of reactor 4 is lower than setting value, and the aperture of the 2nd electric control valve 7 is 0, and then control module carries out the PID computing and exports control signal, increases the heating power of well heater 2;
Return the temperature (TIC (1) value) of judging reactor 4 and whether be higher than the setting value step.
If it is not to have a condition not satisfy in 0 that the temperature of reactor 4 is lower than the aperture of setting value and the 2nd electric control valve 7, then returns the temperature (TIC (1) value) of judging reactor 4 and whether be higher than the setting value step.
If the temperature of reactor 4 is higher than setting value, then control module carries out the PID computing and exports control signal, reduces the heating power of well heater 9;
Whether the temperature of judging reactor 4 that continues is higher than setting value, and whether well heater 2 stops;
When the temperature of reactor 4 is higher than setting value, and well heater 2 starts cooling pump 10 when stopping, for reactor 4 mends chilled water, control module carries out the PID computing simultaneously and exports control signal, increases the aperture of the 2nd electric control valve 7, comes the flow of inlet water of augmenting response device chilled water with this;
When the temperature of reactor 4 is higher than critical temperature (technological process is set at 552 ℃ in the present embodiment), reactor 4 overtemperature alarms.
If the temperature of reactor 4 does not reach critical temperature, then return the temperature of judging reactor 4 and whether be higher than the setting value step.
There is a condition to satisfy if the temperature of reactor 4 is higher than setting value and well heater 9 in stopping, then returns the temperature of judging reactor 4 and whether be higher than the setting value step.
The present invention is directed to super-critical water treatment reactor one cover Process Control System PCS7 is provided, real-time regulated by pid algorithm realization response device head temperature, realize control automatically, guarantee the safe and reliable lasting operation of waste organic compound supercritical water harmless treatment and recycling effect and reactor.
Control module adopts Siemens S7-400H redundant system in the present embodiment, uses on SIMATIC S7 programmable logic controller (PLC) by SFB/FB " CONT_C " (continuous controller), comes the CONTROL PROCESS process by the input and output variable that continues.Between allotment period, can make the needs of the controller procedure of adaptation in parameter by the subfunction of activation or cancellation activation PID controller.
Can implement " SIMATIC S7 software redundancy " software package on the S7-400H modular system, allow the process that when breaking down, postpones to switch to alternative system with control, as water supply project, water treatment system or traffic flow control procedure through the several seconds.
S7-400H is fault-tolerant automated system, just needs to use when only controlling coupling of safety-relevant processes under other measure cooperates.Two CPU are core components of redundant system, operate with channel structure, and redundant implementation is " hard redundant ", and redundant switching mode is " heat is redundant ".Active and standby CPU has identical user program under the redundant state, and passes through " event driven synchronous " synchronous executive routine of method of Siemens.In case in the time of may causing the different incident of the internal element state at active and standby station to take place, the incident that I/O directly visit for example will be by automatic synchronous their data of operating system.
Redundant system is under normal condition, and active and standby CPU participates in routine processes and data operation simultaneously, and difference is that spare CPU is not exported control signal.To not have the active and standby CPU switching of disturbance if main station failure takes place, and take over the control of production run from the point of interruption by spare CPU, and be in the unit duty.CPU does not have switching time, and system depends primarily on the switching time of network switching time, the output state before output keeps switching in this section period, and no information or warning/interruption are lost between transfer period.For the like product of other company, general CPU reaches Millisecond switching time, as long as less than I/O time delay and warning/interruption detection time, can guarantee that just no signal is lost between transfer period switching time.
The PCS7 Process Control System can satisfy the high requirement of first-class automated system at availability, degree of intelligence and distributed output facet.System provides the process data collection and has prepared required all functions, comprising open loop control, closed loop control and the function for monitoring of assembling and equipment.
Claims (9)
1. super critical water treatment system temperature of reactor control device, it is characterized in that: comprise control module, temperature transmitter (TIC (1)), cooling pump (10), electric control valve and well heater (2), wherein the acquired signal input end of control module be located at critical water treatment system in the temperature transmitter (TIC (1)) at reactor (4) top link to each other, output terminal is connected to the control loop of cooling pump (10), electric control valve and well heater (2); Described electric control valve is located at the exit of cooling pump (10).
2. by the described super critical water treatment system temperature of reactor of claim 1 control device, it is characterized in that: described control module comprises central processing unit, analog input unit, analog quantity output unit and digital quantity output unit, wherein central processing unit is connected to temperature transmitter (TIC (1)) by analog input unit, the output terminal of central processing unit is connected to the well heater control loop by the analog quantity output unit, electric control valve, electric actuator and cooling pump (10) rotating speed control loop links to each other with the start and stop control loop of cooling pump (10) and the electric actuator of electric control valve by the digital quantity output unit.
3. by the described super critical water treatment system temperature of reactor of claim 1 control device, it is characterized in that: described well heater control loop has the three-phase power adjuster, and it receives the control signal of analog quantity output unit output, and well heater is carried out Power Regulation.
4. by the described super critical water treatment system temperature of reactor of claim 2 control device, it is characterized in that: described control module is with the right form configuration of redundancy, and single operation is automaticallyed switch.
5. super critical water treatment system temperature of reactor control method is characterized in that may further comprise the steps:
Beginning, the temperature controlling value of reactor and the pid parameter of electric control valve are set in the device initialization;
Control module is gathered the temperature of reactor (4) by temperature transmitter (TIC (1));
Whether the temperature of judging reactor (4) is higher than setting value;
If be not higher than setting value, then control module carries out the PID computing and exports control signal, reduces the flow of inlet water of reactor cooling water;
Whether the temperature of judging reactor (4) is lower than setting value, and whether the flow of inlet water of reactor cooling water is 0;
If the temperature of reactor (4) is lower than setting value, and the flow of inlet water of reactor cooling water is 0, and then PID computing and export control signal increases the heating power of well heater (2);
Return the temperature of judging reactor (4) and whether be higher than the setting value step.
6. by the described super critical water treatment system temperature of reactor of claim 5 control method, it is characterized in that:
If the temperature of reactor (4) is lower than setting value, the flow of inlet water of reactor cooling water is to have a condition to satisfy in 0, then returns the big or small step of judging TIC (1) and setting value.
7. by the described super critical water treatment system temperature of reactor of claim 5 control method, it is characterized in that:
If the temperature of reactor (4) is higher than setting value, then control module carries out the PID computing and exports control signal, reduces the heating power of well heater (2);
Whether the temperature of judging reactor (4) that continues is higher than setting value, and whether well heater (2) stops;
When the temperature of judging reactor (4) is higher than setting value, and well heater (2) starts cooling pump (10) when stopping, and mends chilled water for reactor (4), and control module carries out the PID computing simultaneously and exports control signal, increases the flow of inlet water of reactor cooling water;
When the temperature of reactor (4) is higher than the reactor head critical temperature, reactor (4) overtemperature alarm.
8. by the described super critical water treatment system temperature of reactor of claim 7 control method, it is characterized in that:
If the temperature of reactor (4) does not reach the reactor head critical temperature, then return the temperature of judging reactor (4) and whether be higher than the setting value step.
9. by the described super critical water treatment system temperature of reactor of claim 7 control method, it is characterized in that:
If the temperature of reactor (4) is higher than setting value, well heater (2) has a condition not satisfy in stopping, then returns the temperature of judging reactor (4) and whether be higher than the setting value step.
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| CN2009102484624A CN102103383A (en) | 2009-12-16 | 2009-12-16 | Temperature control device of reactor in supercritical water processing system and control method thereof |
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| CN2009102484624A CN102103383A (en) | 2009-12-16 | 2009-12-16 | Temperature control device of reactor in supercritical water processing system and control method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104536494A (en) * | 2014-11-11 | 2015-04-22 | 新奥科技发展有限公司 | Control method of supercritical processing system |
| CN104865996A (en) * | 2015-05-06 | 2015-08-26 | 新奥科技发展有限公司 | Supercritical water reaction temperature control method, device and supercritical water reactor system |
| CN106168816A (en) * | 2015-05-20 | 2016-11-30 | 豪威株式会社 | Warm water supply method, warm water feedway and utilize its water purifier |
| CN109847669A (en) * | 2019-01-31 | 2019-06-07 | 西安交通大学 | A kind of overtemperture control system and control method for supercritical water oxidation apparatus tubular reactor |
-
2009
- 2009-12-16 CN CN2009102484624A patent/CN102103383A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104536494A (en) * | 2014-11-11 | 2015-04-22 | 新奥科技发展有限公司 | Control method of supercritical processing system |
| CN104865996A (en) * | 2015-05-06 | 2015-08-26 | 新奥科技发展有限公司 | Supercritical water reaction temperature control method, device and supercritical water reactor system |
| CN104865996B (en) * | 2015-05-06 | 2018-01-23 | 新奥环保技术有限公司 | A kind of supercritical water reaction temprature control method and device and supercritical water reaction device system |
| CN106168816A (en) * | 2015-05-20 | 2016-11-30 | 豪威株式会社 | Warm water supply method, warm water feedway and utilize its water purifier |
| US10604399B2 (en) | 2015-05-20 | 2020-03-31 | Coway Co., Ltd | Hot water supply method, hot water supply device, and water purifier using same |
| CN106168816B (en) * | 2015-05-20 | 2020-12-11 | 豪威株式会社 | Hot water supply method, hot water supply device, and water purifier using same |
| CN109847669A (en) * | 2019-01-31 | 2019-06-07 | 西安交通大学 | A kind of overtemperture control system and control method for supercritical water oxidation apparatus tubular reactor |
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