CN101690935B - Control method of waste organic compound supercritical water reaction and treatment system - Google Patents
Control method of waste organic compound supercritical water reaction and treatment system Download PDFInfo
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Abstract
The invention relates to the waste organic compound supercritical water treatment field, in particular to the filed that supercritical water is used as reaction medium to perform harmless treatment and resource recycling to high concentration organic wastewater, municipal sludge and other waste organic compounds which are difficult to be biochemically degraded and discloses a control method of a waste organic compound supercritical water reaction and treatment system. The control method can conveniently adjust the internal temperature and pressure of the reactor to satisfy the reaction conditions, adjust the wall temperature of the pressure retaining wall of the reactor and ensure that the waste organic compound supercritical water treatment system can run steadily, safely and reliably.
Description
Technical field
The present invention relates to the waste organic compound supercritical water process field, be particularly related to and utilize supercritical water the waste organic matters such as organic wastewater/municipal sludge of high concentration bio-refractory to be carried out harmless treatment and recycling, be specially a kind of control method of waste organic compound supercritical water reaction and treatment system as reaction medium.
Background technology
Supercritical water (Supercritical Water, be called for short SCW) be meant temperature and pressure all be higher than its critical point (T=374.15 ℃, the water of special state P=22.12MPa).Supercritical water has the character of liquid and vaporous water concurrently, has only a spot of hydrogen bond to exist under this state, and dielectric constant is similar to organic solvent, has high diffusion coefficient and low viscosity.Under sufficiently high pressure, organic matter, oxygen can dissolve each other by arbitrary proportion and SCW, thereby make heterogeneous reaction become homogeneous reaction, have reduced the resistance of mass transfer, heat transfer greatly.Particularly the solubility of salt in SCW is extremely low for inorganic matter, easily it is separated.The supercritical water treatment technology is that to utilize supercritical water all be the special nature of good solvent to organic matter and oxidant, organic matter carries out homogeneous reaction in supercritical water environment under the prerequisite that the varying number oxidant is provided, 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 under the situation of small amounts agent) and H
2The micromolecular compound that O etc. are harmless.
The operating condition of HTHP has proposed strict requirement to the control of supercritical water reaction and treatment system, though many waste organic compound supercritical water reaction and treatment systems occurred, but these reaction systems are relatively simple for structure, and do not see the report to the supercritical water reaction and treatment system control method of complexity as yet.
Summary of the invention
The control method that the purpose of this invention is to provide a kind of waste organic compound supercritical water reaction and treatment system can guarantee the stable operation safely and reliably of waste organic compound supercritical water treatment system.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
A kind of control method of waste organic compound supercritical water reaction and treatment system, described waste organic compound supercritical water reaction and treatment system comprises:
Reaction member, the reactor, desalting and deslagging device, the storage salt pond that comprise the countercurrent pot-type of vertically arranged successively blender, built-in evaporation wall, the material outlet end of described blender is communicated with the material inlet end of reactor, the salt discharge port of export of reactor bottom is communicated with the arrival end of desalting and deslagging device, and the outlet at bottom end of desalting and deslagging device is communicated with the arrival end in storage salt pond; Be provided with cooling coil in the described reactor; Be provided with heat(ing) coil in the described desalting and deslagging device;
The oxygen supply unit comprises the oxygen supply path, provides oxygen to blender oxygen intake end; The oxygen supply path is provided with oxygen control valve;
Feed unit comprises the material path, provides material to the material inlet end of blender; Described material path is provided with the Material control valve and is used for first electric heater of material heating;
Evaporation wall water feeding unit comprises evaporation wall water primary path, second electric heater, and primary path evaporation wall water is divided into two branch roads behind second electric heater; Article one, the Zhi Luxiang reactor head provides evaporation wall water, and is provided with evaporated on top wall water control valve, and another Zhi Luxiang reactor middle part provides evaporation wall water, and is provided with middle part evaporation wall water control valve;
The chilled(cooling) water supply (CWS) unit comprises cooling-water duct, provides cooling water to described cooling coil, and cooling-water duct is provided with the cooling water control valve;
The liquid collector unit, the overflow liquid of the autoreactor top exit of collecting;
The top exit of described reactor is provided with the overflow control valve, be divided into two branch roads by liquid behind the overflow control valve, article one, branch road is successively by influent collector unit behind collection hydraulic control valve and the counterbalance valve, another branch road feeds described heat(ing) coil, and the heat(ing) coil outlet is provided with the heating control valve for fluids;
It is characterized in that this control method may further comprise the steps: at first, the top fluid pressure and temperature of detection reaction device, carry out following control according to top fluid pressure and temperature then:
(1) the pressure control of reactor head fluid temperature (F.T.) when design temperature
When the top fluid pressure is higher than setting pressure, increase the aperture of counterbalance valve; When being lower than setting pressure, reduce the aperture of counterbalance valve; When surpassing the maximum working pressure (MWP) of reactor, reduce the top fluid pressure of reactor earlier by the aperture that increases counterbalance valve; If it can not be reduced in the service pressure scope, then stop first electric heater on the material path, and the supply that stops oxygen and material;
(2) the temperature control of reactor head fluid pressure when setting pressure
When the reactor head fluid temperature (F.T.) is higher than design temperature, reduce the heating power of first electric heater, if being reduced to zero, its power still can not control requirement by satisfied temperature, then open the cooling water control valve and regulate; When the reactor head fluid temperature (F.T.) is lower than design temperature, improve the top fluid temperature (F.T.) by the aperture that reduces the cooling water control valve earlier, if being reduced to zero, the flow of cooling water still can not control when requiring by satisfied temperature, then start first electric heater and regulate; When surpassing the maximum operating temperature of reactor, stop first electric heater, regulate the cooling water control valve and lower the temperature;
(3) temperature and pressure of reactor head fluid coupling control
When the pressure of reactor head fluid surpasses setting pressure, and when the temperature of top fluid surpasses design temperature, increase the aperture of counterbalance valve, reduce the heating power of first electric heater simultaneously, if still can not satisfy the control requirement, then open the cooling water control valve, its aperture is ascending regulates;
When the pressure of reactor head fluid surpasses setting pressure, and the temperature of top fluid is when being lower than design temperature, then increase the counterbalance valve aperture, reduce the aperture of cooling water control valve simultaneously, if the cooling water control valve opening is adjusted to zero, the temperature of top fluid still is lower than design temperature, then opens first electric heater and regulates;
When the pressure of reactor head fluid is lower than setting pressure, and the temperature of top fluid is when being higher than design temperature, then reduce the aperture of counterbalance valve, reduce the heating power of first electric heater simultaneously, if the heating power of first electric heater is reduced to zero, still do not satisfy the control requirement, then open the cooling water control valve and regulate;
When the pressure of reactor head fluid is lower than setting pressure, and the temperature of top fluid is when being lower than design temperature, then reduce the aperture of counterbalance valve, reduce the aperture of cooling water control valve simultaneously, still do not satisfy the control requirement if the aperture of cooling water control valve is reduced to zero, then open first electric heater and regulate.
Technique scheme is further improved and optimizes.Simultaneously, the gentle cylindrical shell wall temperature of cover wall of difference detection reaction device pressure-bearing wall, carry out the temperature control of reactor pressure-bearing wall according to the gentle cylindrical shell wall temperature of cover wall: when the gentle cylindrical shell wall temperature of cover wall all is higher than or all is lower than corresponding design temperature, elder generation is undertaken integrally-regulated by the power of controlling second electric heater, regulate separately by the top or the middle part evaporation wall water control valve of correspondence again; When one of them of the gentle cylindrical shell wall temperature of cover wall is higher or lower than corresponding design temperature, regulate separately by the top or the middle part evaporation wall water control valve of correspondence earlier, undertaken integrally-regulated by the power of controlling second electric heater again.
The present invention is by the pressure of counterbalance valve, first electric heater and cooling water control valve regulation inside reactor fluid.The reaction temperature that heating power by regulating first electric heater and the flow that enters cooling water in the reactor cooling coil come conditioned reaction device top fluid is kept the reaction temperature condition of setting.Regulate aperture, the heating power of first electric heater and the aperture of cooling water control valve of counterbalance valve by combination and come the required reaction condition (temperature and pressure) in realization response device top.Simultaneously, integrally-regulated by second electric heater, and the independent adjusting of top or middle part evaporation wall water control valve, control evaporation wall water has guaranteed that the pressure-bearing wall of reactor maintains in the design temperature scope in suitable temperature range, overheating problem does not take place.Control method of the present invention can be simultaneously controlled the temperature of the pressure of super-critical water treatment reactor, reaction temperature, pressure-bearing wall, under the situation of realization response device safe and reliable operation, improves the automatization level of reaction system.
Description of drawings
Fig. 1 is the rough schematic view of waste organic compound supercritical water reaction and treatment system;
Fig. 2 is the rough schematic view that has the waste organic compound supercritical water reaction and treatment system of desalting and deslagging device;
Wherein: 1 is first electric heater, and 2 is blender, and 3 is reactor, 31 is the pressure-bearing wall, and 32 is evaporation wall, and 4 is cooling coil, 5 is second electric heater, and 6 is high-pressure metering pump, and 7 is the evaporation wall water tank, 8 is counterbalance valve, and 9 is the high-pressure cooling water pump, and 10 is cooling water tank, 11 is desalting and deslagging device, 12 is heat(ing) coil, and 100 is the Material control valve, and 101 is oxygen control valve, 102 is evaporated on top wall water control valve, 103 is middle part evaporation wall water control valve, and 104 is the cooling water control valve, and 105 are the overflow control valve, 106 for collecting hydraulic control valve, 107 are the heating control valve for fluids, and TIC (1-4) is a temperature sensor, and PIC (1) is a pressure sensor.
The specific embodiment
Below in conjunction with Fig. 1 control method of the present invention is described in further detail:
With reference to Fig. 1, Fig. 2, waste organic compound supercritical water reaction and treatment system mainly comprises: reaction member, oxygen supply unit, feed unit, evaporation wall water feeding unit, chilled(cooling) water supply (CWS) unit, liquid collector unit.
Reaction member comprises reactor 3, desalting and deslagging device 11, the storage salt pond (not shown) of the countercurrent pot-type of vertically arranged successively blender 2, built-in evaporation wall.The material outlet end of blender 2 is communicated with the material inlet end of reactor 3, and the salt discharge port of export of reactor 3 bottoms is communicated with the arrival end of desalting and deslagging device 11, and the outlet at bottom end of desalting and deslagging device 11 is communicated with the arrival end in storage salt pond.Be provided with cooling coil 4 in the reactor 3, be used for the fluid of cooling reactor 3 inside; Be provided with heat(ing) coil 12 in the desalting and deslagging device 11, be used to heat the saliferous fluid so that the separating out of saliferous material.
The oxygen supply unit comprises the oxygen supply path, provides oxygen to the oxygen intake end of blender 2; The oxygen supply path is provided with oxygen control valve 101.Feed unit comprises the material path, provides material to the material inlet end of blender 2.The material path is provided with Material control valve 100 and is used for first electric heater 1 of material heating.
Evaporation wall water feeding unit comprises evaporation wall water primary path, and second electric heater 5, primary path evaporation wall water are divided into two branch roads behind second electric heater 5; Article one, Zhi Luxiang reactor 3 tops (top cover) provides evaporation wall water, and is provided with evaporated on top wall water control valve 102, and another Zhi Luxiang reactor middle part (cylindrical shell) provides evaporation wall water, and is provided with middle part evaporation wall water control valve 103.The evaporation wall water of primary path extracts from evaporation wall water tank 7 by high-pressure metering pump 6.
The chilled(cooling) water supply (CWS) unit comprises cooling-water duct, provides cooling water to described cooling coil 4, and cooling-water duct is provided with cooling water control valve 104.High-pressure cooling water pump 9 extracts cooling water from cooling water tank 10, by an end of cooling water control valve 104 back feeding cooling coils 4, and the other end output hot water or the steam of cooling coil 4.
Liquid collector unit, the overflow liquid of the autoreactor top exit of collecting, overflow liquid are that clean liquid can be recycled.As shown in Figure 2, the top exit of reactor is provided with overflow control valve 105, be divided into two branch roads by overflow control valve 105 back liquid, article one, branch road is successively by collecting hydraulic control valve 106 and counterbalance valve 8 back influent collector units, another branch road feeds heat(ing) coil 12, heat(ing) coil 12 outlets are provided with heating control valve for fluids 107, are used for controlling the saliferous fluid of heating desalting and deslagging device 11.
In running; start high-pressure metering pump 6; from evaporation wall water tank 7, extract evaporation wall water; after 5 preheatings of second electric heater; divide two-way to enter reactor 3 from reactor head (top cover) and reactor middle part (cylindrical shell) respectively; form one deck protectiveness moisture film at the inner surface place of porous evaporator wall, avoid the mineralization and the etching problem of reactor 3.Guarantee that the safe and reliable and stable operation of reaction system should guarantee the reaction condition (temperature and pressure) of reactor 3, guarantees that again pressure-bearing wall 31 temperature are in safe and reliable scope.
With reference to waste organic compound supercritical water reaction and treatment system shown in Figure 1, present embodiment is a foundation with control method of the present invention, and at first, the top fluid pressure and temperature of detection reaction device 3 carries out following control according to top fluid pressure and temperature then.
(1) the pressure control of reactor head fluid temperature (F.T.) when design temperature
When the top fluid pressure is higher than setting pressure, increase the aperture of counterbalance valve 8; When being lower than setting pressure, reduce the aperture of counterbalance valve 8; When surpassing the maximum working pressure (MWP) of reactor 3, reduce the top fluid pressure of reactor 3 earlier by the aperture that increases counterbalance valve 8; If it can not be reduced in the service pressure scope, then stop first electric heater 1 on the material path, and the supply that stops oxygen and material.
Be specially: the pressure sensor PIC (1) on the reactor 3 is used for measuring and showing the pressure of reactor 3 top fluids.When reactor 3 top fluid pressure P I (1) are outside range of set value,, PI (1) is stabilized in the setting pressure scope by regulating the aperture of counterbalance valve 8.
In other words, when PI (1) is higher than setting value, increase the aperture of counterbalance valve 8; When PI (1) is lower than setting value, reduce the aperture of counterbalance valve 8; PI (1) is stabilized in the setting pressure scope.When PI (1) surpasses the maximum working pressure (MWP) of reactor 3, preferentially reduce PI (1) by the aperture that increases counterbalance valve 8, if it can not be reduced in the service pressure scope, then stop the electric heater 1 on the material pipeline automatically, close oxygen control valve 101 and Material control valve 100 on oxygen and the material pipeline, stop the supply of oxygen and material.
(2) the temperature control of reactor head fluid pressure when setting pressure
When reactor 3 top fluid temperature (F.T.)s are higher than design temperature, reduce the heating power of first electric heater 1, if being reduced to zero, its power still can not control requirement by satisfied temperature, then open cooling water control valve 104 and regulate; When reactor 3 top fluid temperature (F.T.)s are lower than design temperature, earlier improve the top fluid temperature (F.T.) by the aperture that reduces cooling water control valve 104, if the flow of cooling water is reduced to zero and still can not controls when requiring by satisfied temperature, then start first electric heater 1 and regulate; When surpassing the maximum operating temperature of reactor 3, stop first electric heater 1, regulate cooling water control valve 104 and lower the temperature.
Be specially: the setting value of reactor 3 top fluid temperature (F.T.) TI (1) is no more than the maximum operating temperature of reactor 3.When TI (1) is outside the design temperature scope, regulate the heating power of first electric heater 1 automatically, TI (1) is maintained in the design temperature scope.As TI (1) when being higher than design temperature, reduce the heating power of first electric heater 1, if its power is reduced to zero TI (1) is reduced in the design temperature scope, then start high-pressure cooling water pump 9, slowly open cooling water control valve 104, aperture is regulated from small to large, and cooling reactor 3 top fluids are stabilized in the design temperature scope TI (1); As TI (1) when being lower than design temperature, preferentially by the aperture that reduces cooling water control valve 104 reduce enter the cooling coil 4 in the reactor 3 cooling water flow to improve TI (1), if the flow of cooling water is reduced to zero, TI (1) is elevated in the design temperature scope, then start first electric heater 1, TI (1) is stabilized in the design temperature scope by increasing its power.In addition, when reactor 3 top fluid temperature (F.T.) TI (1) surpass the maximum operating temperature of reactor 3, stop first electric heater 1 automatically, start high-pressure cooling water pump 9, open cooling water control valve 104 rapidly, make TI (1) be no more than the maximum operating temperature of reactor 3.
(3) temperature and pressure of reactor head fluid coupling control
When the pressure of reactor 3 top fluids surpasses setting pressure, and when the temperature of top fluid surpasses design temperature, increase the aperture of counterbalance valve 8, reduce the heating power of first electric heater 1 simultaneously, if still can not satisfy the control requirement, then open cooling water control valve 104, its aperture is ascending regulates;
When the pressure of reactor 3 top fluids surpasses setting pressure, and the temperature of top fluid is when being lower than design temperature, then increase counterbalance valve 8 apertures, reduce the aperture of cooling water control valve 104 simultaneously, if the cooling water control valve opening is adjusted to zero, the temperature of top fluid still is lower than design temperature, then opens first electric heater 1 and regulates;
When the pressure of reactor 3 top fluids is lower than setting pressure, and the temperature of top fluid is when being higher than design temperature, then reduce the aperture of counterbalance valve 8, reduce the heating power of first electric heater 1 simultaneously, if the heating power of first electric heater is reduced to zero, still do not satisfy the control requirement, then open cooling water control valve 104 and regulate;
When the pressure of reactor 3 top fluids is lower than setting pressure, and the temperature of top fluid is when being lower than design temperature, then reduce the aperture of counterbalance valve 8, reduce the aperture of cooling water control valve 104 simultaneously, still do not satisfy the control requirement if the aperture of cooling water control valve 104 is reduced to zero, then open first electric heater 1 and regulate.
Be specially: when the pressure P I (1) of reactor 3 top fluids surpasses setting pressure, and when the temperature T I of top fluid (1) surpasses design temperature, when increasing the aperture of counterbalance valve 8 automatically, reduce the heating power of first electrical heating 1, if still can not satisfy control requires then starts high-pressure cooling water pump 9, the aperture of cooling water control valve 104 is ascending regulates, and the pressure and temperature that guarantees reactor 3 top fluids is in normal range of set value.
When the pressure P I (1) of reactor 3 top fluids surpasses setting pressure, and the temperature T I of top fluid (1) is lower than when setting value, when then increasing counterbalance valve 8 apertures automatically, reduce the aperture of cooling water control valve 104, if the aperture of cooling water control valve 104 is to zero, TI (1) still is lower than setting value, then increases the heating power of first electric heater 1 automatically, and PI (1) and TI (1) all are stabilized in the setting range.
When the pressure P I (1) of reactor 3 top fluids is lower than setting pressure, and the temperature T I of top fluid (1) is higher than when setting value, when then reducing the aperture of counterbalance valve 8 automatically, automatically reduce the heating power of first electric heater 1, if the heating power of primary heater 1 is reduced to zero, still do not satisfy the control requirement, then start high-pressure cooling water pump 9, automatically increase the aperture of cooling water control valve 104, PI (1) and TI (1) all are stabilized in the setting range.
When the pressure P I (1) of reactor 3 top fluids is lower than setting pressure, and the temperature T I of top fluid (1) is lower than when setting value, when then reducing the aperture of counterbalance valve 8 automatically, automatically reduce the aperture of cooling water control valve 104, if the aperture of cooling water control valve 104 is reduced to zero and does not still meet the demands, then increase the heating power of first electric heater 1, PI (1) and TI (1) all are stabilized in the setting range.
(4) temperature of reactor pressure-bearing wall control
The gentle cylindrical shell wall temperature of cover wall of difference detection reaction device pressure-bearing wall 31, carry out the temperature control of reactor pressure-bearing wall 31 according to the gentle cylindrical shell wall temperature of cover wall: when the gentle cylindrical shell wall temperature of cover wall all is higher than or all is lower than corresponding design temperature, elder generation is undertaken integrally-regulated by the power of controlling second electric heater 5, regulate separately by the top or the middle part evaporation wall water control valve 102,103 of correspondence again; When one of them of the gentle cylindrical shell wall temperature of cover wall is higher or lower than corresponding design temperature, regulate separately by the top or the middle part evaporation wall water control valve 102,103 of correspondence earlier, undertaken integrally-regulated by the power of controlling second electric heater 5 again.
Be specially: temperature sensor TIC (2) and TIC (3) are set respectively on the top cover of the pressure-bearing wall 31 of reactor 3 and the cylindrical shell, are used for measuring and showing the top cover temperature T I (2) and the barrel temperature TI (3) of the pressure-bearing wall 31 of reactor 3.When TI (2), TI (3) are beyond range of set value, top or middle part evaporation wall water control valve 102,103 carry out Automatic Balance Regulation, wherein top or middle part evaporation wall water control valve 102,103 initially all is in half-open position, detailed process is: when TI (2) was outside range of set value, the aperture by independent adjusting evaporated on top wall water control valve 102 was stabilized in the range of set value TI (2); When TI (3) is outside range of set value, it is stabilized in the range of set value by independent aperture of regulating middle part evaporation wall water control valve 103 (original state is half-open).The purpose of above-mentioned Automatic Balance Regulation is that TI (2) and TI (3) are controlled in the setting range, and adjusting is to guarantee that preferentially TI (3) is normal in proper order automatically, secondly is to guarantee that TI (2) is normal.If after the Automatic Balance Regulation, TI (2), TI (3) all are stabilized in the range of set value, following two kinds of situations occur:
1) one or two is lower than design temperature among TI (2), the TI (3), the inlet temperature that evaporation wall water is described is low, need to increase the inlet temperature of evaporation wall water, the method of regulating is: start second electric heater 5, automatically increase its heating power, make TI (2), TI (3) near in the design temperature scope; Finally make TI (2), TI (3) in the design temperature scope.
2) one or two all is higher than design temperature among TI (2), the TI (3), the inlet temperature height of evaporation wall water is described, need to reduce the inlet temperature of evaporation wall water, the method for regulating is: reduce the heating power of electric heater 5 automatically, make TI (2), TI (3) near in the design temperature scope; Then, carry out Automatic Balance Regulation, finally make TI (2), TI (3) in the design temperature scope by top or middle part evaporation wall water control valve 102,103.
(5) control of the temperature in the desalting and deslagging device
With reference to Fig. 2, temperature sensor TIC (4) is set in the desalting and deslagging device 11, be used for measuring the inner fluid temperature (F.T.) of this device.The high temperature fluid of reactor 3 top exits is divided into two-way, and one tunnel heat exchange coil 12 that enters in the desalting and deslagging device 11 is heated to the supercritical water temperature with the fluid of this device inside, regulates its flows by heating control valve for fluids 107; By collecting hydraulic control valve 106 and counterbalance valve 8 back influent collector units, recycle successively on another road.
When the fluid temperature (F.T.) TI (4) of desalting and deslagging device 11 inside was lower than a certain setting supercritical water temperature, the aperture that increases heating control valve for fluids 107 increased the flow of hot fluid after the reaction that enters in the heat exchange coil 12, and then improves TI (4).When TI (4) is higher than the supercritical water temperature value of this setting, the aperture that reduces to heat control valve for fluids 107 reduces the flow of this reaction back, road hot fluid, and then reduce TI (4), guarantee that finally TI (4) is stabilized in the supercritical water temperature range of a certain setting.
Claims (2)
1. the control method of a waste organic compound supercritical water reaction and treatment system, described waste organic compound supercritical water reaction and treatment system comprises:
Reaction member, the reactor, desalting and deslagging device, the storage salt pond that comprise the countercurrent pot-type of vertically arranged successively blender, built-in evaporation wall, the material outlet end of described blender is communicated with the material inlet end of reactor, the salt discharge port of export of reactor bottom is communicated with the arrival end of desalting and deslagging device, and the outlet at bottom end of desalting and deslagging device is communicated with the arrival end in storage salt pond; Be provided with cooling coil in the described reactor; Be provided with heat(ing) coil in the described desalting and deslagging device;
The oxygen supply unit comprises the oxygen supply path, provides oxygen to blender oxygen intake end; The oxygen supply path is provided with oxygen control valve;
Feed unit comprises the material path, provides material to the material inlet end of blender; Described material path is provided with the Material control valve and is used for first electric heater of material heating;
Evaporation wall water feeding unit comprises evaporation wall water primary path, second electric heater, and primary path evaporation wall water is divided into two branch roads behind second electric heater; Article one, the Zhi Luxiang reactor head provides evaporation wall water, and is provided with evaporated on top wall water control valve, and another Zhi Luxiang reactor middle part provides evaporation wall water, and is provided with middle part evaporation wall water control valve;
The chilled(cooling) water supply (CWS) unit comprises cooling-water duct, provides cooling water to described cooling coil, and cooling-water duct is provided with the cooling water control valve;
The liquid collector unit, the overflow liquid of the autoreactor top exit of collecting;
The top exit of described reactor is provided with the overflow control valve, be divided into two branch roads by liquid behind the overflow control valve, article one, branch road is successively by influent collector unit behind collection hydraulic control valve and the counterbalance valve, another branch road feeds described heat(ing) coil, and the heat(ing) coil outlet is provided with the heating control valve for fluids;
It is characterized in that this control method may further comprise the steps: at first, the top fluid pressure and temperature of detection reaction device, carry out following control according to top fluid pressure and temperature then:
(1) the pressure control of reactor head fluid temperature (F.T.) when design temperature
When the top fluid pressure is higher than setting pressure, increase the aperture of counterbalance valve; When being lower than setting pressure, reduce the aperture of counterbalance valve; When surpassing the maximum working pressure (MWP) of reactor, reduce the top fluid pressure of reactor earlier by the aperture that increases counterbalance valve; If it can not be reduced in the service pressure scope, then stop first electric heater on the material path, and the supply that stops oxygen and material;
(2) the temperature control of reactor head fluid pressure when setting pressure
When the reactor head fluid temperature (F.T.) is higher than design temperature, reduce the heating power of first electric heater, if being reduced to zero, its power still can not control requirement by satisfied temperature, then open the cooling water control valve and regulate; When the reactor head fluid temperature (F.T.) is lower than design temperature, improve the top fluid temperature (F.T.) by the aperture that reduces the cooling water control valve earlier, if being reduced to zero, the flow of cooling water still can not control when requiring by satisfied temperature, then start first electric heater and regulate; When surpassing the maximum operating temperature of reactor, stop first electric heater, regulate the cooling water control valve and lower the temperature;
(3) temperature and pressure of reactor head fluid coupling control
When the pressure of reactor head fluid surpasses setting pressure, and when the temperature of top fluid surpasses design temperature, increase the aperture of counterbalance valve, reduce the heating power of first electric heater simultaneously, if still can not satisfy the control requirement, then open the cooling water control valve, its aperture is ascending regulates;
When the pressure of reactor head fluid surpasses setting pressure, and the temperature of top fluid is when being lower than design temperature, then increase the counterbalance valve aperture, reduce the aperture of cooling water control valve simultaneously, if the cooling water control valve opening is adjusted to zero, the temperature of top fluid still is lower than design temperature, then opens first electric heater and regulates;
When the pressure of reactor head fluid is lower than setting pressure, and the temperature of top fluid is when being higher than design temperature, then reduce the aperture of counterbalance valve, reduce the heating power of first electric heater simultaneously, if the heating power of first electric heater is reduced to zero, still do not satisfy the control requirement, then open the cooling water control valve and regulate;
When the pressure of reactor head fluid is lower than setting pressure, and the temperature of top fluid is when being lower than design temperature, then reduce the aperture of counterbalance valve, reduce the aperture of cooling water control valve simultaneously, still do not satisfy the control requirement if the aperture of cooling water control valve is reduced to zero, then open first electric heater and regulate.
2. the control method of a kind of waste organic compound supercritical water reaction and treatment system according to claim 1, it is characterized in that: simultaneously, the gentle cylindrical shell wall temperature of cover wall of difference detection reaction device pressure-bearing wall, carry out the temperature control of reactor pressure-bearing wall according to the gentle cylindrical shell wall temperature of cover wall: when the gentle cylindrical shell wall temperature of cover wall all is higher than or all is lower than corresponding design temperature, elder generation is undertaken integrally-regulated by the power of controlling second electric heater, regulate separately by the top or the middle part evaporation wall water control valve of correspondence again; When one of them of the gentle cylindrical shell wall temperature of cover wall is higher or lower than corresponding design temperature, regulate separately by the top or the middle part evaporation wall water control valve of correspondence earlier, undertaken integrally-regulated by the power of controlling second electric heater again.
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| CN102633351B (en) * | 2012-04-23 | 2013-07-10 | 西安交通大学 | Desalting and salt discharging control method for supercritical water oxidation systems |
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| CN105906028B (en) * | 2016-06-29 | 2018-09-18 | 广西大学 | A kind of etch-proof Supercritical water oxidation treatment device of anti-clogging |
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