CN215585973U - Wet flue gas desulfurization oxidation amount of wind monitoring centralized control system - Google Patents
Wet flue gas desulfurization oxidation amount of wind monitoring centralized control system Download PDFInfo
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- CN215585973U CN215585973U CN202121249679.XU CN202121249679U CN215585973U CN 215585973 U CN215585973 U CN 215585973U CN 202121249679 U CN202121249679 U CN 202121249679U CN 215585973 U CN215585973 U CN 215585973U
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Abstract
The utility model discloses a centralized control system for monitoring oxidation air volume of wet flue gas desulfurization, which comprises an absorption tower for desulfurization reaction and also comprises: the slurry oxidation analyzer is arranged on the outer side of the absorption tower, and a liquid inlet of the slurry oxidation analyzer is communicated with the absorption tower; the DCS control chamber is arranged on one side of the slurry oxidation analyzer; the utility model carries out sampling analysis on the oxidation index of the slurry in the absorption tower by a slurry oxidation analyzer, namely the concentration of the residual sulfite product generated by oxidizing the slurry is controlled in a specified range, and a measurement signal is transmitted back to the step DThe CS control room is used for controlling the opening degree of an air door of the oxidizing air fan inlet adjusting device SO as to realize automatic energy-saving operation of an oxidizing air system, the oxidizing air volume is maximally utilized, waste is avoided, and SO in flue gas caused by insufficient oxidizing air volume is avoided2The gypsum cannot be fully absorbed and discharged to exceed the standard, the slurry is poisoned, and the operation cost is increased, namely, the consumption of limestone is high, the purity of the gypsum is reduced, the gypsum is difficult to dehydrate, and the like.
Description
Technical Field
The utility model belongs to the technical field of wet desulphurization, and particularly relates to a centralized control system for monitoring oxidation air volume of wet flue gas desulphurization.
Background
At present, more than 90 percent of domestic thermal power plants adopt limestone-gypsum wet desulphurization technology. However, the oxidation link in the wet desulphurization process is not well known, the wet desulphurization process is divided into four stages of absorption, neutralization, oxidation and crystallization, and the biggest difference between the wet desulphurization process and other desulphurization modes (such as a dry method, a semi-dry method and the like) is that calcium sulfite is fully oxidized in the oxidation process, and finally, the calcium sulfite is crystallized into gypsum capable of being comprehensively utilized. The problem that an oxidation stage has no control means generally exists in the wet desulphurization process, the oxidation stage has no reliable and effective monitoring means in the wet desulphurization process, SO2 in flue gas caused by insufficient oxidation air volume can not be fully absorbed and discharged to exceed the standard due to the change of the sulfur content of coal, human factors and the like, the risks of slurry poisoning, increased operation cost (large limestone consumption), reduced gypsum purity, difficult gypsum dehydration and the like are caused, meanwhile, when a unit runs at low load, the excessive oxidation air volume causes the risks of large electric energy loss of an oxidation fan, increased wastewater treatment difficulty, dust discharge exceeding the standard and the like, the model selection of the oxidation fan is designed on the basis of the BMCR working condition of a boiler and the sulfur content of coal of designed coal, and because of no on-line measuring instrument and automatic control function, the fan is manually operated in a rated current mode under the BMCR working condition according to operation rules, most of the oxidation air volume is wasted.
SUMMERY OF THE UTILITY MODEL
The utility model provides a centralized control system for monitoring oxidation air volume in wet flue gas desulfurization, which aims to solve the problems mentioned in the background.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a wet flue gas desulfurization oxidation amount of wind monitoring centralized control system, includes the absorption tower that is used for desulfurization reaction, still includes:
the slurry oxidation analyzer is an SOA and is arranged on the outer side of the absorption tower, and a liquid inlet of the slurry oxidation analyzer is communicated with the absorption tower;
the DCS control chamber is arranged on one side of the slurry oxidation analyzer, and a signal input end of the DCS control chamber is electrically connected with a measurement signal output end of the slurry oxidation analyzer;
the oxidation fan is arranged below the DCS control chamber, an air outlet of the oxidation fan is communicated with the interior of the absorption tower, and the oxidation fan is electrically connected with a signal output end of the DCS control chamber.
Preferably, the air inlet of the oxidation fan is provided with a regulating device, namely SSR.
Preferably, one side of the absorption tower is provided with SO2An inlet pipe.
Preferably, the adjusting device comprises a fixed disk fixed with the oxidation fan, an air inlet shell is arranged on one side of the fixed disk, a fairing is arranged inside the air inlet shell, and an adjusting mechanism is arranged on the periphery of the air inlet shell;
adjustment mechanism is including setting up the circumferential strip in the outside of air inlet casing, the periphery of circumferential strip evenly is provided with the dead lever, the outer end of dead lever all is provided with the movable block, set up flutedly on the movable block, the dead lever sets up in the recess, the last fixed axis of rotation that is provided with of movable block, the axis of rotation runs through and stretches into inside the air inlet casing, the axis of rotation is connected with the rotation of air inlet casing, the one end that the axis of rotation is located the air inlet casing inside is provided with the blade.
Preferably, the oxidation extension machine comprises a fan body, a fan impeller is arranged inside the fan body, and a fan volute is arranged on one side of the fan body.
Preferably, a driving mechanism is arranged on the ring strip;
actuating mechanism is including fixing the fixed column at the girth outside surface, the outside of fixed column is provided with the fixed strip, the notch has been seted up on the fixed strip, the fixed column sets up in the notch, the one end of fixed strip sets up the dwang, the outside of dwang is provided with the sleeve, telescopic outside one side is provided with the fixed plate, the fixed plate is fixed outside the air inlet casing, the dwang stretches out telescopic upper end rigid coupling and has the movable rod.
Preferably, one end of the movable rod is provided with an actuator.
Preferably, the fairing is provided with a spherical shape on one side and a long cylinder shape on one side.
Preferably, the slurry oxidation analyzer comprises a box body, a liquid collector is arranged in the box body, a sampler is arranged above the liquid collector, a placing table is arranged on the outer side of the bottom of the sampler, a lifting frame is arranged at the lower end of the placing table, a sealing element is arranged at the upper end of the box body, an analyzer body is arranged at the upper end of the sealing element, a detection probe of the analyzer body is inserted into the sampler, a sampling tube is arranged at the rear side of the box body, and the sampling tube extends into the sampler and is attached to the inner wall of the sampler; a washing water pipe is arranged at the rear side of the box body, extends into the sampler and is attached along the inner wall of the sampler; a drain pipe is arranged at the bottom of the liquid collector and extends into the outside of the box body; the bottom of the box body is provided with a platform base; the surface of the box body is hinged with a second box door, and the adjacent surfaces of the second box door and the closed part of the box body are provided with heat preservation layers; heat insulation cotton is arranged in the interlayer on the inner wall of the box body; the surface of the analyzer body is provided with a first box door which is hinged, and the middle of the first box door is provided with a display screen; and a liquid baffle plate is arranged below the liquid collector.
Compared with the prior art, the utility model has the beneficial effects that:
1. the utility model carries out sampling analysis on the oxidation index of the slurry in the absorption tower by the slurry oxidation analyzer, namely the concentration of sulfite which is a residual product of slurry oxidation is controlled in a specified range, and transmits a measurement signal to the DCS control room to control the opening degree of an air door of an inlet adjusting device of an oxidation fan, SO as to realize automatic energy-saving operation of an oxidation air system, maximally utilize the oxidation air volume, avoid waste and avoid SO in flue gas caused by insufficient oxidation air volume2The gypsum cannot be fully absorbed and discharged to exceed the standard, the slurry is poisoned, and the operation cost is increased, namely, the consumption of limestone is high, the purity of the gypsum is reduced, the gypsum is difficult to dehydrate, and the like.
2. The box body of the slurry oxidation analyzer disclosed by the utility model is isolated from air, so that data distortion caused by air oxidation is avoided, a certain speed and direction vortex is formed by slurry entering the sampler from the sampling pipe, the analyzer body can be stably and continuously detected by the flow direction change of the slurry, and a measurement signal is transmitted to the DCS control chamber, so that real-time monitoring is realized, the slurry can be prevented from being deposited and blocked by the flushing water of a specific flushing water pipe, and the problem of detection data fluctuation caused by bubbles caused by the quality problem of the slurry is solved; the heat preservation cotton and the heat preservation layer protect the temperature of the slurry to be stable, and the distortion of other ion point positions to the detection data is isolated, so that the detection is accurate, and the real-time detection is realized.
3. The adjusting device has a large adjusting range and excellent adjusting performance;
through the passageway that forms between air inlet casing, radome fairing, blade and air inlet casing and the radome fairing, have unique variable geometry runner, be different from the adjustable stator in the import of fan factory present configuration, if: petal valve can effectively reduce the impact and the flow friction loss of air current, forms the swirl field in advance, and effectual reduction guarantees that the wind pressure reaches the technological requirement because the wind pressure loss that the inlet valve opening degree of adjusting low caused, has unique wind field design to guarantee that fan regulation performance is stable, adjust the degree of depth big, there is not ordinary fan entry, if: the fan speed is kept unchanged, but the current of the motor can be reduced due to timely changing the flow of the fan, so that a large amount of electricity can be saved, and if the fan works under 70% of load, the electricity saving rate can reach 15-20% or even more;
4. the adjusting device reduces surge and enlarges a working area;
the utility model is different from the traditional adjusting mode which is easy to cause the surging of the fan, the working interval is far less than the requirement of the change of the actual working condition, and the great waste of resources is caused.
5. The adjusting device is efficient and energy-saving, and the manufacturing cost is reduced;
the integrated technology has high economic value, is convenient to install, does not need any change on the original fan unit, and has relatively gentle fan pressure drop in the adjusting process, so the requirement of a user on the fan pressure can be considered while the air supply amount is reduced, the maintenance and maintenance workload is extremely low, the fan flow can be dynamically and finely adjusted in real time according to the actual operation working condition, the precision is high, the adjusting performance is stable, the excellent flow-pressure adjusting performance is realized, the motor does not need to be modified and replaced, the cost performance is very high, and the fan unit is suitable for popularization.
Drawings
Fig. 1 is a schematic structural diagram of a centralized control system for monitoring oxidation air volume in wet flue gas desulfurization.
FIG. 2 is a schematic view of the connecting structure of the SSR and the oxidation fan.
Fig. 3 is a schematic view of the internal structure of the air intake housing of the present invention.
Fig. 4 is a schematic structural diagram of the driving mechanism of the present invention.
Fig. 5 is a schematic structural diagram of the adjusting mechanism of the present invention.
FIG. 6 is a connection structure diagram of the ring strip, the fixed rod, the groove and the movable block.
Fig. 7 is a schematic view of the state of adjustment of the adjusting mechanism of the present invention.
FIG. 8 is a comparison graph of the surge limit of the ordinary blower with the SSR.
FIG. 9 is a comparison graph of the original wind speed and the SSR added.
FIG. 10 is a schematic view of the structure of the slurry oxidation analyzer of the present invention.
FIG. 11 is a side view of a slurry oxidation analyzer of the present invention.
FIG. 12 is a schematic perspective view of a slurry oxidation analyzer according to the present invention.
In the figure: 1. an air inlet housing; 2. a cowling; 3. a drive mechanism; 31. an actuator; 32. a fixing plate; 33. A sleeve; 34. a fixing strip; 35. fixing a column; 36. a notch; 37. rotating the rod; 38. a movable rod; 4. a fan impeller; 5. a fan volute; 6. a fan body; 7. fixing the disc; 8. an adjustment mechanism; 81. a blade; 82. A ring strip; 83. fixing the rod; 84. a groove; 85. a movable block; 86. a rotating shaft; 101. a seal member; 102. Flushing the water pipe; 103. a sampler; 104. a liquid collector; 105. a liquid baffle; 106. a heat-insulating layer; 107. a platform base; 108. a lifting frame; 109. a placing table; 110. heat preservation cotton; 111. a sampling tube; 112. a display screen; 113. an analyzer body; 114. a first door; 115. a blow-off pipe; 116. a box body; 117. a second door.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-12, the present invention provides the following technical solutions:
example 1
The utility model provides a wet flue gas desulfurization oxidation amount of wind monitoring centralized control system, includes the absorption tower that is used for desulfurization reaction, still includes: the slurry oxidation analyzer, namely SOA, is arranged outside the absorption tower, and a liquid inlet of the slurry oxidation analyzer is communicated with the absorption tower; the DCS control chamber is arranged on one side of the slurry oxidation analyzer, and a signal input end of the DCS control chamber is electrically connected with a measurement signal output end of the slurry oxidation analyzer; the oxidation fan is a centrifugal fan and is arranged below the DCS control chamber, an air outlet of the oxidation fan is communicated with the inside of the absorption tower, and the oxidation fan is electrically connected with a signal output end of the DCS control chamber; one side of the absorption tower is provided with SO2An inlet tube; the slurry oxidation analyzer comprises a box body 116, a liquid collector 104 is arranged in the box body 116, a drain pipe 115 is arranged at the bottom of the liquid collector 104 for draining slurry in the liquid collector 104, the drain pipe 115 extends into the outside of the box body 116, and a liquid baffle plate 105 is arranged below the liquid collector 104 for preventing slurry from leaking; a sampler 103 is arranged above the liquid collector 104, a placing table 109 is arranged outside the bottom of the sampler 103, a lifting frame 108 is arranged at the lower end of the placing table 109, a sealing element 101 is arranged at the upper end of a box body 116, an analyzer body 113 is arranged at the upper end of the sealing element 101, and the analyzer body is providedThe measurement signal of the body 113 is input into the DCS control room, in order to facilitate the observation of the analysis data, a first door 114 hinged to the surface of the analyzer body 113 is arranged, and a display screen 112 is arranged in the middle of the first door 114; a detection probe of the analyzer body 113 is inserted into the sampler 103, a sampling tube 111 is arranged at the rear side of the box body 116, and the sampling tube 111 extends into the sampler 103 and is attached along the inner wall of the sampler 103; in order to stably support the platform base 107, the platform base 107 is arranged at the bottom of the box body 116;
in this embodiment, in order to avoid the thick liquid sediment jam, and can eliminate the bubble, prevent the bubble gathering, the rear side of box 116 is provided with wash pipe 102, and wash pipe 102 stretches into in sampler 103, and sets up along the laminating of sampler 103 inner wall.
In this embodiment, in order to protect the temperature stability of the slurry and isolate the distortion of the detection data caused by other ion point positions, the surface of the box 116 is hinged with a second box door 117, the adjacent surfaces of the closed positions of the second box door 117 and the box 116 are both provided with an insulating layer 106, and the interlayer of the inner wall of the box 116 is provided with insulating cotton 110.
Specifically, slurry in the absorption tower continuously enters the sampler 103 through the sampling pipe 101, the oxidation index of the slurry is measured through a probe of the analyzer body 113, namely, the concentration of sulfite which is a residual product of slurry oxidation is controlled in a specified range, air is isolated through the box body 116, so that data distortion caused by air oxidation is avoided, the slurry enters the sampler 103 from the sampling pipe 111 to form a vortex with a certain speed and direction, the analyzer body 113 can stably and continuously detect the slurry through flow direction conversion of the slurry, a measurement signal is transmitted to the DCS control chamber, the slurry can be prevented from being precipitated and blocked by flushing of a specific flushing water pipe 102, and the problem of detection data fluctuation caused by bubbles caused by the problem of slurry quality is solved; the heat insulation cotton 106 and the heat insulation layer 110 protect the temperature stability of the slurry and isolate the distortion of other ion point positions to the detection data.
Example 2
As an optional situation, please refer to fig. 2-9, a centralized control system for monitoring and controlling wet flue gas desulfurization and oxidation air volume, wherein an oxidation separator comprises a fan body, a fan impeller 4 is arranged inside the fan body 6, a fan volute 5 is arranged on one side of the fan body 6, and an air inlet of the oxidation fan is provided with a regulating device, namely an SSR, the regulating device comprises a fixed disk 7 fixed with the oxidation fan, an air inlet housing 1 is arranged on one side of the fixed disk 7, a fairing 2 is arranged inside the air inlet housing 1, the fairing 2 is arranged in a shape of a sphere on one side and a long cylinder on one side, so that turbulence generated before air enters the fan can be well regulated, unnecessary mechanical wear and energy loss are reduced, and the fan can be used more efficiently; the air inlet shell 1 and the fairing 2 form a unique air inlet channel, so that air can be reasonably turned and is closer to the wind direction of the fan impeller 4, and the air inflow speed is increased; the periphery of the air inlet shell 1 is provided with an adjusting mechanism 8;
For driving and adjusting, the ring strip 82 is provided with a driving mechanism 3;
In the prior art, a fan always works in combination with a pipe network, if the resistance of a pipe network system is stable in the combined work, the fan also can work stably under a certain working condition, and the working condition is the design working condition of the fan. The resistance of the pipe network can change frequently in the actual production operation, namely the performance change curve of the pipe network, and the flow and pressure change of the fan is required to meet the specific value according to the requirement of the production process. According to the change of the performance of the pipe network, the performance curve of the pipe network is correspondingly changed, and the process is called as the performance adjustment of the fan. The adjusting device can achieve the purpose of changing the performance of the fan by changing the angle of the inlet air flow entering the fan impeller 4, and simultaneously can change the boundary, the flow, the air pressure and the shaft power, as shown in fig. 7, when the equal-pressure outlet and equal-flow adjustment of the fan are adopted, the power of the fan body 6 is obviously reduced due to the large reduction of the flow and the higher adjusting efficiency, thereby achieving the dual purposes of saving power and adjusting, and the adjusting device is operated according to the change of working conditions to implement remote manual operation or automatic control.
According to the velocity triangle, the velocity of the fluid in the fan wheel 4 is the sum of the vectors of the tangential traction velocity along the fan wheel 4 and the axial relative velocity, see fig. 8. The adjusting device changes the wind direction and strengthens the wind speed, so that the wind speed at the outlet of the fan body 6 is increased, and the wind direction opposite to the running direction of the fan is formed. According to the wind pressure formula, the wind pressure and the wind speed are in a direct proportion relation, and when the wind speed is increased, the wind pressure is also increased along with the increase of the wind speed. Therefore, the stability of the wind pressure at the outlet of the fan body 6 well kept by the adjusting device can better meet the requirement of the desulfurization oxidation wind process, a wind direction opposite to the fan body 6 can be formed through the blades 81 to form a rotational flow field, the loss of the wind pressure can be effectively reduced, and the energy loss is reduced.
Specifically, during the use, it rotates to drive movable rod 38 through executor 31, thereby drive dwang 37 and fixed strip 34 and rotate, it rotates along air inlet casing 1 to drive fixed column 35 and gird 82 through notch 36, thereby it rotates to drive dead lever 83, it rotates to drive movable block 85 through dead lever 83, it rotates to drive axis of rotation 86, finally drive blade 81 and rotate, thereby it changes the direction of entry air to make to reach the change blade 81 direction, form the air current unanimous with fan wheel 4 turning, make in the more efficient entering fan body 6 of air, the more efficient operation of fan body 6.
The scheme in this embodiment can be selectively combined with the scheme in other embodiments.
The working principle and the using process of the utility model are as follows: when the device is used, a slurry oxidation analyzer, namely an SOA (service oriented architecture) samples from a position representative of the slurry oxidation reaction of the absorption tower, the slurry is connected through a pipeline, the slurry of the absorption tower continuously enters the SOA, the SOA measures in real time, and the slurry oxidation index is measured; SOA transmits measuring signal for DCS system room, and DCS system room is through the size of control oxidation fan entry adjusting device operation control entry to realize the automatic energy-conserving operation of oxidation wind system, make the oxidation amount of wind by the maximize utilization, avoid extravagant, and keep the stability of 6 export wind pressures of fan body.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a wet flue gas desulfurization oxidation amount of wind monitoring centralized control system, includes the absorption tower that is used for desulfurization reaction, its characterized in that still includes:
the slurry oxidation analyzer is arranged on the outer side of the absorption tower, and a liquid inlet of the slurry oxidation analyzer is communicated with the absorption tower;
the DCS control chamber is arranged on one side of the slurry oxidation analyzer, and a signal input end of the DCS control chamber is electrically connected with a measurement signal output end of the slurry oxidation analyzer;
the oxidation fan is arranged below the DCS control chamber, an air outlet of the oxidation fan is communicated with the interior of the absorption tower, and the oxidation fan is electrically connected with a signal output end of the DCS control chamber.
2. The wet flue gas desulfurization and air oxidation volume monitoring centralized control system according to claim 1, characterized in that: and an air inlet of the oxidation fan is provided with an adjusting device.
3. The wet flue gas desulfurization and air oxidation volume monitoring centralized control system according to claim 1, characterized in that: one side of the absorption tower is provided with SO2An inlet pipe.
4. The wet flue gas desulfurization and air oxidation volume monitoring centralized control system according to claim 2, characterized in that: the adjusting device comprises a fixed disk fixed with the oxidation fan, an air inlet shell is arranged on one side of the fixed disk, a fairing is arranged inside the air inlet shell, a fan body is arranged on the other side of the fixed disk, a fan impeller is arranged inside the fan body, and an adjusting mechanism is arranged on the periphery of the air inlet shell;
adjustment mechanism is including setting up the circumferential strip in the outside of air inlet casing, the periphery of circumferential strip evenly is provided with the dead lever, the outer end of dead lever all is provided with the movable block, set up flutedly on the movable block, the dead lever sets up in the recess, the last fixed axis of rotation that is provided with of movable block, the axis of rotation runs through and stretches into inside the air inlet casing, the axis of rotation is connected with the rotation of air inlet casing, the one end that the axis of rotation is located the air inlet casing inside is provided with the blade.
5. The wet flue gas desulfurization and air oxidation volume monitoring centralized control system according to claim 1, characterized in that: the oxidation fan comprises a fan body, a fan impeller is arranged in the fan body, and a fan volute is arranged on one side of the fan body.
6. The wet flue gas desulfurization and air oxidation volume monitoring centralized control system according to claim 4, characterized in that: the ring strip is provided with a driving mechanism;
actuating mechanism is including fixing the fixed column at the girth outside surface, the outside of fixed column is provided with the fixed strip, the notch has been seted up on the fixed strip, the fixed column sets up in the notch, the one end of fixed strip sets up the dwang, the outside of dwang is provided with the sleeve, telescopic outside one side is provided with the fixed plate, the fixed plate is fixed outside the air inlet casing, the dwang stretches out telescopic upper end rigid coupling and has the movable rod.
7. The wet flue gas desulfurization and air oxidation volume monitoring centralized control system according to claim 6, characterized in that: one end of the movable rod is provided with an actuator.
8. The wet flue gas desulfurization and air oxidation volume monitoring centralized control system according to claim 4, characterized in that: the fairing is set to be spherical on one side and long-barrel-shaped on one side.
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| CN113230846A (en) * | 2021-06-05 | 2021-08-10 | 安徽科力德能源环境科技有限公司 | Automatic monitoring and centralized control system and method for wet flue gas desulfurization and oxidation air volume |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113230846A (en) * | 2021-06-05 | 2021-08-10 | 安徽科力德能源环境科技有限公司 | Automatic monitoring and centralized control system and method for wet flue gas desulfurization and oxidation air volume |
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