CN115729288A - Intelligent optimization control system and method for desulfurization and denitrification of activated carbon - Google Patents
Intelligent optimization control system and method for desulfurization and denitrification of activated carbon Download PDFInfo
- Publication number
- CN115729288A CN115729288A CN202211454530.4A CN202211454530A CN115729288A CN 115729288 A CN115729288 A CN 115729288A CN 202211454530 A CN202211454530 A CN 202211454530A CN 115729288 A CN115729288 A CN 115729288A
- Authority
- CN
- China
- Prior art keywords
- activated carbon
- flue gas
- box body
- temperature
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Treating Waste Gases (AREA)
Abstract
The invention belongs to the technical field of desulfurization and denitrification, and provides an intelligent optimization control system and method for desulfurization and denitrification of activated carbon, wherein a flue gas optimization control subsystem is used for automatically controlling temperature, pressure and differential pressure, an activated carbon circulation optimization control subsystem is used for judging the charging sequence, and the desulfurization and denitrification optimization control subsystem is used for carrying out total amount adjustment on the charged activated carbon, adjusting the discharging speed of the activated carbon and automatically controlling ammonia injection; the original manual operation mode is replaced, the labor intensity of operators is greatly reduced, the production efficiency is improved, and the situations of large control parameter fluctuation, unstable system operation and poor desulfurization and denitrification effects caused by untimely operation are avoided.
Description
Technical Field
The invention belongs to the technical field of desulfurization and denitrification, and particularly relates to an intelligent optimization control system and method for desulfurization and denitrification of activated carbon.
Background
At present, the control of the activated carbon desulfurization and denitrification process mostly adopts manual intervention and experience judgment, the labor intensity of operators is high, and intelligent diagnosis, intelligent evaluation and intelligent control of a system cannot be realized.
The inventor finds that the main defects of the control of the existing activated carbon desulfurization and denitrification process are as follows: manual operation is mostly adopted for controlling the temperature, pressure and flow of the flue gas, and the fluctuation of a control target is large due to untimely control, so that the system is unstable in operation and the desulfurization and denitrification effects are poor; the prior system does not comprehensively track and evaluate the operation state of the box body of the adsorption tower, and can not visually reflect the operation state of the system through box body operation indexes, so that control measures are not taken timely when the system has problems in operation, great interference is caused to the stable operation of the system, and the service life of equipment is adversely affected; the situations of material stacking and material overflowing frequently occur in the process of conveying the activated carbon in the existing system, so that the waste of the activated carbon is caused, and the operation cost of the system is increased; in the existing system, the loading and unloading processes of the box bodies of the adsorption tower are often out of time, and the heights of the activated carbon material layers in the box bodies are inconsistent, SO that the adsorption effect of SO2 is uneven; the desorption capability is poor, and the reabsorption capability and the service life of the activated carbon are influenced; the removal effect of certain boxes on SO2 or NOX is possibly poor due to the influence of various factors in the operation process of the system, SO that the effect and index requirements of the whole desulfurization and denitrification are influenced, and the intelligent identification and optimal control on the desulfurization and denitrification effects cannot be realized.
Disclosure of Invention
In order to solve at least one of the problems, the invention provides an intelligent optimization control system and method for desulfurization and denitrification of activated carbon, which are optimized by original manual operation into automatic control of the system, so that the labor intensity of operators is greatly reduced, the production efficiency is improved, and the conditions of large fluctuation of control parameters, unstable system operation and poor desulfurization and denitrification effects caused by untimely operation are avoided.
In order to achieve the above object, in a first aspect, the present invention provides an intelligent optimization control system for desulfurization and denitrification of activated carbon, which adopts the following technical scheme:
an active carbon SOx/NOx control intelligence optimal control system includes:
the flue gas optimization control subsystem is used for controlling the temperature, the pressure and the differential pressure of the flue gas; during temperature control, the temperature is adjusted according to the deviation between the actual measured value of the flue gas temperature and the set value of the flue gas temperature; during pressure and differential pressure control, adjusting according to a set value and a detection value of the differential pressure, wherein the differential pressure is the difference between the pressure of the inlet flue gas and the pressure of the outlet flue gas;
the activated carbon circulation optimization control subsystem is used for automatically analyzing and judging the charging sequence according to the charging time and interval of the activated carbon, the discharging time and interval of the activated carbon and the material level of the activated carbon;
and the desulfurization and denitrification optimization control subsystem is used for adjusting the total amount of the added activated carbon, adjusting the discharging speed of the activated carbon and automatically controlling ammonia spraying.
Further, the smoke optimization control subsystem comprises a smoke optimization control module and a box body running state evaluation module;
the flue gas optimization control module adjusts the frequency of the cooling fan to realize the adjustment of the flue gas temperature according to the deviation between the actual flue gas temperature measured value and the first flue gas temperature set value; setting an inlet flue gas pressure set value according to production needs, wherein the inlet flue gas pressure set value and an inlet flue gas pressure detection value are used as the input of a flue gas pressure regulator; setting differential pressure set values of an inlet and an outlet of the adsorption tower according to production needs, wherein the differential pressure set values and detection values are used as the input of a differential pressure regulator; the output of the two regulators is analyzed and compared, the regulator with small function is selected as the input of the booster fan frequency regulator, and the output of the booster fan frequency regulator regulates the frequency of the booster fan to realize the automatic control of the flue gas inlet pressure;
the box running state evaluation module ensures that the pressure in the box is stabilized in a set range by controlling the cutting number of the adsorption tower groups, ensures that the differential pressure value in the box is stabilized at a set value by controlling the input number of the adsorption tower groups, and calculates the maximum value, the minimum value and the average value of temperature measuring points of each box after eliminating the data of instrument faults.
Further, when the frequency of the cooling fan is adjusted to a temperature at which the power frequency still cannot meet the production requirement, stopping adjusting and keeping the cooling fan running at the power frequency, and adjusting the opening of the cold exchanging valve to adjust the flue gas temperature; when the temperature in the adsorption tower box body deviates from the second flue gas temperature set value, the first flue gas temperature set value is automatically adjusted according to the deviation of the actual temperature value in the adsorption tower box body and the second flue gas temperature set value, so that the temperature in the adsorption tower box body is restored to the range required by normal production.
Further, when the maximum value is higher than the first set value, warning display is carried out; when the maximum value reaches a second set value and exceeds a first preset time, the adsorption tower box body is judged to be in a hot spot state, the box body group where the adsorption tower box body is located automatically turns to a cutting state, and meanwhile, alarm display is carried out; when the maximum value reaches a third set value and exceeds a second preset time, the box body of the adsorption tower is judged to be in a hot spot state, the box body group where the box body of the adsorption tower is located automatically exits from the online state, and meanwhile, alarm display is carried out; the first set value is smaller than the second set value, and the second set value is smaller than the third set value; the first preset time is greater than the second preset time.
Further, when the box body group exits from the online state, a nitrogen valve of the box body is automatically opened, and nitrogen gas is filled into the box body of the adsorption tower; when the pressure in the adsorption tower box body reaches or is higher than a first preset pressure, the nitrogen valve is automatically closed; when the pressure in the box body of the adsorption tower is lower than a second preset pressure, automatically opening a nitrogen valve to continuously charge nitrogen; the first preset pressure is greater than the second preset pressure.
Furthermore, when the hot spot is detected, the adsorption tower box body group is allowed to be put into the adsorption tower again only when the temperature is lower than a first set value and the preset time is delayed, otherwise, the adsorption tower box body group is forbidden to be put into the adsorption tower.
Further, the activated carbon loading control is that activated carbon is loaded into a discharge tank from a chain bucket machine through a discharge push rod and then loaded into the box body of the adsorption tower through the discharge tank; polling charging is carried out on the blanking tanks in different rows according to the running direction of the chain bucket machine and a set time sequence, when the blanking tanks are not full of signals, outlet valves of the blanking tanks are closed and polling signals come, charging of the blanking tanks is allowed, corresponding inlet valves of the blanking tanks are opened, and charging to the blanking tanks is started; stopping charging when the material dropping tank is full; and when the adsorption tower box body is not provided with a full material level signal, the corresponding blanking tank starts to charge the adsorption tower box body.
Further, the activated carbon unloading control is to unload the activated carbon in the box body of the adsorption tower to a lock air hopper and then unload the activated carbon from the lock air hopper to a chain bucket conveyor system; when the time for starting unloading is reached and the air lock hopper meets the unloading condition, the box body of the adsorption tower starts unloading to the air lock hopper.
Further, when the material level of the activated carbon in the analysis tower is higher than a set value, the frequency of a cooling fan is automatically increased, the temperature of the activated carbon in the cooling section is reduced, the automatic PID adjustment of the temperature of the heating section is realized through the frequency control of a heating fan of the analysis tower, and the temperature of the heating section is controlled within a set range; and the PID adjustment of the degassing section temperature is automatically realized through the frequency control of the acid gas fan.
In order to achieve the above object, in a second aspect, the present invention further provides an intelligent optimization control method for desulfurization and denitrification of activated carbon, which adopts the following technical scheme:
an intelligent optimization control method for desulfurization and denitrification of activated carbon, which adopts the intelligent optimization control system for desulfurization and denitrification of activated carbon as described in the first aspect, comprises the following steps:
controlling the temperature, pressure and differential pressure of the flue gas; during temperature control, the temperature is adjusted according to the deviation between the actual measured value of the flue gas temperature and the set value of the flue gas temperature; during pressure and differential pressure control, adjusting according to a set value and a detection value of the differential pressure, wherein the differential pressure is the difference between the pressure of the inlet flue gas and the pressure of the outlet flue gas;
automatically analyzing and judging the charging sequence according to the charging time and interval of the activated carbon, the discharging time and interval of the activated carbon and the material level of the activated carbon;
the total amount of the activated carbon is adjusted, the discharging speed of the activated carbon is adjusted, and the ammonia spraying is automatically controlled
Compared with the prior art, the invention has the beneficial effects that:
1. the flue gas optimization control subsystem automatically controls temperature, pressure and differential pressure, the activated carbon circulation optimization control subsystem judges the charging sequence, and the desulfurization and denitrification optimization control subsystem regulates the total amount of the charged activated carbon, adjusts the discharging speed of the activated carbon and automatically controls ammonia spraying; the original manual operation mode is replaced, the labor intensity of operators is greatly reduced, the production efficiency is improved, and the conditions of large control parameter fluctuation, unstable system operation and poor desulfurization and denitrification effects caused by untimely operation are avoided;
2. according to the invention, comprehensive state evaluation is established on the operation state of the box body of the adsorption tower, and the operation state and alarm information of the system are prompted in time through comprehensive analysis and judgment on the operation parameters of the system, so that adverse effects on production and equipment are avoided;
3. the invention optimizes the activated carbon conveying system, avoids the situations of activated carbon stacking and material overflowing in the production process and saves the system operation cost;
4. the invention optimizes the loading and unloading control of the activated carbon, avoids the condition of uneven SO2 adsorption effect caused by inconsistent height control of the activated carbon material layer in each box body, and reduces the emission of SO 2.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the present embodiments, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the present embodiments and together with the description serve to explain the present embodiments without unduly limiting the present embodiments.
FIG. 1 is a block diagram of a desulfurization and denitrification system in example 1 of the present invention;
FIG. 2 is a system configuration diagram according to embodiment 1 of the present invention;
FIG. 3 is a hot spot control flow chart of the box in embodiment 1 of the present invention;
FIG. 4 is a functional block diagram of hot spot control of the box body according to embodiment 1 of the present invention;
fig. 5 is a control flowchart of embodiment 1 of the present invention.
Detailed Description
The invention is further described with reference to the following figures and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure herein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
Example 1:
as shown in fig. 1, the embodiment provides an intelligent optimization control system for desulfurization and denitrification of activated carbon, which includes a flue gas optimization control subsystem, an activated carbon circulation optimization control subsystem, and a desulfurization and denitrification optimization control subsystem. The system comprises a smoke optimization control subsystem, a box body operation state evaluation module, a smoke optimization control subsystem and a smoke optimization control subsystem, wherein the smoke optimization control subsystem comprises a smoke optimization control module and a box body operation state evaluation module; the activated carbon circulation optimization control subsystem comprises an activated carbon conveying optimization control module, an activated carbon loading and unloading optimization control module and an analysis optimization control module; the desulfurization and denitrification optimization control subsystem comprises an ammonia injection optimization control module and an SO2 optimization control module.
The flue gas optimization control module can control the temperature, pressure, differential pressure and other parameters of the flue gas by means of PID, data comparison analysis, comprehensive judgment and the like, so that the safe, reliable and stable circulation of the flue gas in the box body of the adsorption tower is ensured, and a basis is provided for better realizing indexes of desulfurization and denitrification.
The flue gas temperature control can realize the control target of the flue gas temperature through the cascade control of the inner ring double controllers, and comprises a first flue gas temperature regulator and a second flue gas temperature regulator; the frequency of the cooling fan and the opening degree of the cool exchanging air valve are adjusted to achieve the control target; setting a first flue gas temperature setter, setting a first flue gas temperature set value according to production requirements, and adjusting the frequency of a cooling fan through the set first flue gas temperature setter according to the deviation between an actual flue gas temperature measured value and the flue gas temperature set value; when the frequency of the cooling fan is adjusted to a temperature at which the power frequency still cannot meet the production requirement, the first flue gas temperature regulator stops regulating and keeps the cooling fan to operate at the power frequency, and meanwhile, the opening degree of the hot-air mixing valve is regulated through the second flue gas temperature regulator to further regulate the flue gas temperature. The flue gas after temperature adjustment enters an adsorption tower box body, and SO2 in the flue gas is converted into active carbon in the box body through heat exchange with the active carbon. When the box running state evaluation module analyzes that the temperature in the adsorption tower box is generally higher or lower than a preset second flue gas temperature set value, the first flue gas temperature set value is automatically adjusted on line according to the deviation of the actual temperature value in the adsorption tower box and the second flue gas temperature set value, so that the temperature in the adsorption tower box is restored to the range required by normal production. The automatic control of the smoke temperature without human intervention is realized; the second flue gas temperature set value may be set by a second flue gas temperature setter.
The pressure control of the flue gas can adopt a double PID control mode, a flue gas pressure control loop sets an inlet flue gas pressure set value for an inlet flue gas pressure setter according to production needs, and the inlet flue gas pressure set value and an inlet flue gas pressure detection value are used as the input of a flue gas pressure regulator; the differential pressure control loop is used for controlling the difference between the detection values of the inlet pressure instrument and the outlet pressure instrument of the adsorption tower, the differential pressure regulator is used for setting the differential pressure setting values of the inlet and the outlet of the adsorption tower according to production needs, and the differential pressure setting value and the detection values are used as the input of the differential pressure regulator. The output of the two regulators is analyzed and compared, the regulator with small function is selected as the input of the booster fan frequency regulator, the frequency of the booster fan is adjusted by the output of the booster fan frequency regulator, and automatic control of the smoke inlet pressure without human intervention is realized.
The box body operation state evaluation module can control parameters such as pressure, differential pressure and hot spots of the box body by means of statistical comparison analysis, comprehensive judgment and the like, so that safe, reliable and stable operation of the box body of the adsorption tower is guaranteed.
The box body pressure control is to ensure the pressure in the box body to be stabilized in a set range by controlling the cutting quantity of the adsorption tower groups according to a set value of a control target, the state of the box body, the smoke amount and an actual detection value of the box body pressure, thereby controlling the pressure in the box body to be stabilized.
The box differential pressure control is to ensure that the differential pressure value in the box is stabilized at a set value by controlling the input quantity of the adsorption tower groups according to the box differential pressure set value, the flue gas flow and the state of the adsorption tower groups required by operation. Automatic differential pressure without human intervention in the box body and switching control of the box body group are realized.
The hot point control of the box body is to calculate the maximum value, the minimum value and the average value of temperature measuring points of each box body after eliminating the data of instrument faults through a temperature control module according to 12 temperature measuring points arranged at different positions of each box body of the adsorption tower. When the maximum value is higher than a first set value, warning display is carried out; when the maximum value reaches a second set value and exceeds 15min, the box body of the adsorption tower is judged to be in a hot spot state, the box body group where the box body of the adsorption tower is located automatically turns to a cutting state, the box body group exits from an online state, and meanwhile, alarm display is carried out; and when the maximum value reaches a third set value and exceeds 3min, judging that the box body of the adsorption tower is in a hot spot state, automatically exiting from the online state to convert the box body group in which the box body of the adsorption tower is positioned into an offline state, and simultaneously carrying out alarm display.
When the box body group of the adsorption tower is judged to be in a hot spot state, the box body hot spot control module can automatically close a flue gas inlet and outlet valve of the box body, and the box body group exits from an online state; when the box group quits from the online state, the box hot point control module automatically opens the box nitrogen valve to start to fill nitrogen into the box, so that the inside isolated air of the box is ensured, and the activated carbon is prevented from burning inside the box. When the pressure in the box body of the adsorption tower reaches or is higher than 5kPa, the hot point control module of the box body automatically closes the nitrogen valve so as to prevent the box body from being damaged due to overlarge pressure in the box body; when the pressure in the adsorption tower tank body is lower than 4kPa, the tank body hot spot control module automatically opens the nitrogen valve to continue nitrogen filling and pressure maintaining.
When the box body detects the hot spot, the adsorption tower box body group is allowed to be put into the box body again only when the temperature is lower than a first set value and after 24 hours of delay, otherwise, the adsorption tower box body group is always in a state of forbidding to be put into the box body group.
When the hot spot is detected, the box hot spot control module automatically stops the unloading and loading operation of the corresponding box body, simultaneously disables the unloading and loading functions of the corresponding box body, and does not release the disabled state of unloading and loading until the box body group is allowed to be put in again.
The evaluation of the running state of the box body is to carry out data comprehensive analysis according to the parameters of the temperature, the pressure, the differential pressure, the flue gas inlet and outlet valves, the nitrogen valve, the ammonia injection valve, the SO2, the ammonia escape and the like of the box body, and can realize the real-time health state evaluation and monitoring of the box body of the adsorption tower by utilizing statistics, experience and analysis results.
The activated carbon carries optimization control module can carry out control optimization under traditional control mode, according to activated carbon loading time and interval, activated carbon unloading time and interval and the material level of the interior active carbon of box as the controlled quantity, combine the speed that the activated carbon carried, the control rule of feeding of every adsorption tower box is worked out, the system is according to the rule, automatic analysis and the order of feeding of judging the adsorption tower box, realize the full automatic control that the system active carbon carried, the manual intervention that traditional activated carbon carried control to appear has been avoided, the equipment frequently opens and stops, fold material and flash scheduling problem.
In the activated carbon loading and unloading optimization control module, activated carbon loading control is control of loading activated carbon into an unloading tank from a chain bucket machine through an unloading push rod and then loading the activated carbon into an adsorption tower box body through the unloading tank. The active carbon loading control module carries out polling loading on the blanking tanks in different rows according to the running direction of the chain bucket machine and a set time sequence, when the blanking tanks are not full, outlet valves of the blanking tanks are closed and polling signals come, loading of the blanking tanks is allowed, and the active carbon loading control module sends an instruction to open corresponding inlet valves of the blanking tanks and starts loading to the blanking tanks; and stopping charging when the material falling tank is full. When the adsorption tower box body is not provided with a full material level signal, the corresponding blanking tank starts to charge the adsorption tower box body so as to ensure that the discharge amount of the adsorption tower box body can be timely supplemented. Meanwhile, the control module automatically evaluates the material level in the adsorption tower box body, optimizes the charging sequence of the adsorption tower box body again according to the normal polling mode of the adsorption tower box body according to the height degree of the material level when the material level is lower than the set range, sets the charging priority, preferentially supplements activated carbon to the adsorption tower box body with high priority, automatically switches the polling working mode of the blanking tank to a special working mode by the system at the moment, and preferentially processes the control requirement of high priority by the system under the mode. Meanwhile, when detecting that the blanking tank of the adsorption tower box body corresponding to the low material level is not full, the system also preferentially charges the blanking tank so as to more rapidly supplement new active carbon for the corresponding adsorption tower box body.
The activated carbon unloading control is to unload the activated carbon in the box body of the adsorption tower to the air lock hopper and then to unload the activated carbon from the air lock hopper to the chain bucket conveyor system. And according to the set discharge amount per hour, the activated carbon discharge control module calculates the opening time of the discharge device, and when the discharge starting time is reached and the air lock hopper meets the discharge condition, the adsorption tower box starts to discharge to the air lock hopper. When the air-lock hopper discharges, the activated carbon discharging control module judges material stacking, calculates the discharging sequence of the air-lock hopper according to the process and the time sequence, avoids the material stacking and overflowing on the chain hopper conveyor and shortens the discharging time period to the maximum extent.
The analysis optimization control module is used for adjusting the flow set value of the air gas in real time according to the change of the outlet temperature and the air-fuel ratio by taking the air gas flow set value and the air gas flow measured value as input control quantities and taking the outlet temperature of the hot blast stove as output control quantities, and simultaneously correcting the flow set value of the air gas in real time by combining the residual oxygen content to realize automatic combustion control of the hot blast stove;
under the condition of ensuring that the temperature of the outlet of the hot blast stove is stabilized in a reasonable range, the material level of the activated carbon of the desorption tower is used as an input control quantity, and the temperature of the activated carbon of the cooling section of the desorption tower is used as an output control quantity. When the material level of the activated carbon in the desorption tower is higher than a set value, the control module automatically increases the frequency of the cooling fan, realizes PID (proportion integration differentiation) adjustment of the temperature of the cooling section, quickly reduces the temperature of the activated carbon in the cooling section, and accelerates the discharging speed of the activated carbon, so that the activated carbon quickly enters the heating section to reduce the material level of the activated carbon in the desorption tower; the temperature of the heating section is reduced in the process, and the control module realizes automatic PID adjustment of the temperature of the heating section through the frequency control of the heating fan of the analytic tower and controls the temperature of the heating section within a set range; when the temperature of the cooling section and the heating section changes, the temperature of the degassing section also changes, and the control module automatically realizes PID adjustment of the temperature of the degassing section through the frequency control of the acid gas fan; through the control and adjustment of the processes, the automatic control and adjustment of the discharge amount of the activated carbon in the desorption tower are finally realized.
The SO2 optimization control module detects and monitors the SO2 content of the flue gas in the box body and at the inlet and the outlet of the system in real time, automatically calculates the quantity of the box body required to be put in and the quantity of the required activated carbon according to the SO2 content of the flue gas inlet and the flue gas quantity at the inlet, and adjusts the total quantity of the activated carbon put into the box body by combining with the activated carbon conveying system; automatically calculating and adjusting the discharging speed of the activated carbon according to the SO2 content in each group of boxes; and automatically controlling the ammonia spraying optimization control module according to the SO2 content and the temperature in the box body.
The ammonia injection optimization control module automatically judges whether the starting condition of the ammonia injection system is met or not according to the comprehensive state of the hot blast stove, wherein the state comprises that the outlet temperature of the hot blast stove is greater than a set value, the hot blast stove is in a combustion state and a hot blast fan is operated; automatically judging whether the use conditions of an ammonia station system exist or not according to the comprehensive state of the ammonia station, wherein the state comprises that the liquid level in an ammonia tank is higher than a set value, the pressure of compressed air is higher than the set value, a dilution fan is operated and the temperature of hot air before an ammonia water evaporator is higher than the set value; automatically judging whether the condition for feeding the ammonia spraying system is met or not according to the SO2 content in the box body of the adsorption tower; automatically judging whether the opening condition of an ammonia water outlet valve is met or not according to the temperature of the ammonia water evaporator; when the four conditions are met, the module automatically judges that the ammonia spraying system has the input condition, and the system automatically opens the corresponding ammonia spraying valve according to the input adsorption tower box body.
Example 2:
the embodiment provides an intelligent optimization control method for desulfurization and denitrification of activated carbon, which adopts the intelligent optimization control system for desulfurization and denitrification of activated carbon as described in embodiment 1, and comprises the following steps:
controlling the temperature, pressure and differential pressure of the flue gas; during temperature control, the temperature is adjusted according to the deviation between the actual measured value of the flue gas temperature and the set value of the flue gas temperature; during pressure and differential pressure control, adjusting according to a set value and a detection value of the differential pressure, wherein the differential pressure is the difference between the pressure of the inlet flue gas and the pressure of the outlet flue gas;
automatically analyzing and judging the charging sequence according to the charging time and interval of the activated carbon, the discharging time and interval of the activated carbon and the material level of the activated carbon;
the total amount of the activated carbon is adjusted, the discharging speed of the activated carbon is adjusted, and the ammonia spraying is automatically controlled
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art can make various modifications and variations. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present embodiment should be included in the protection scope of the present embodiment.
Claims (10)
1. The utility model provides an active carbon SOx/NOx control intelligence optimal control system which characterized in that includes:
the flue gas optimization control subsystem is used for controlling the temperature, the pressure and the differential pressure of the flue gas; during temperature control, the temperature is adjusted according to the deviation between the actual measured value of the flue gas temperature and the set value of the flue gas temperature; during pressure and differential pressure control, adjusting according to a set value and a detection value of the differential pressure, wherein the differential pressure is the difference between the pressure of the inlet flue gas and the pressure of the outlet flue gas;
the activated carbon circulation optimization control subsystem is used for automatically analyzing and judging the charging sequence according to the charging time and interval of the activated carbon, the discharging time and interval of the activated carbon and the material level of the activated carbon;
and the desulfurization and denitrification optimization control subsystem is used for adjusting the total amount of the added activated carbon, adjusting the discharging speed of the activated carbon and automatically controlling ammonia spraying.
2. The intelligent optimization control system for desulfurization and denitrification of activated carbon according to claim 1, wherein the flue gas optimization control subsystem comprises a flue gas optimization control module and a box body operation state evaluation module;
the flue gas optimization control module adjusts the frequency of the cooling fan to realize the adjustment of the flue gas temperature according to the deviation between the actual flue gas temperature measured value and the first flue gas temperature set value; setting an inlet flue gas pressure set value according to production needs, wherein the inlet flue gas pressure set value and an inlet flue gas pressure detection value are used as the input of a flue gas pressure regulator; setting differential pressure set values of an inlet and an outlet of the adsorption tower according to production needs, wherein the differential pressure set values and detection values are used as the input of a differential pressure regulator; the output of the two regulators is analyzed and compared, the regulator with small function is selected as the input of the booster fan frequency regulator, and the output of the booster fan frequency regulator regulates the frequency of the booster fan to realize the automatic control of the flue gas inlet pressure;
the box running state evaluation module ensures that the pressure in the box is stabilized in a set range by controlling the cutting number of the adsorption tower groups, ensures that the differential pressure value in the box is stabilized at a set value by controlling the input number of the adsorption tower groups, and calculates the maximum value, the minimum value and the average value of temperature measuring points of each box after eliminating the data of instrument faults.
3. The intelligent optimized control system for desulfurization and denitrification of activated carbon according to claim 2, wherein when the frequency of the cooling fan is adjusted to a temperature at which the power frequency still cannot meet the production requirement, the adjustment is stopped, the cooling fan is kept running at the power frequency, and the opening of the cooling air charging valve is adjusted to adjust the flue gas temperature; when the temperature in the adsorption tower box body deviates from the second flue gas temperature set value, the first flue gas temperature set value is automatically adjusted according to the deviation of the actual temperature value in the adsorption tower box body and the second flue gas temperature set value, so that the temperature in the adsorption tower box body is restored to the range required by normal production.
4. The intelligent optimized control system for desulfurization and denitrification of activated carbon as claimed in claim 2, wherein when the maximum value is higher than the first set value, a warning display is performed; when the maximum value reaches a second set value and exceeds first preset time, judging that the box body of the adsorption tower is in a hot spot state, automatically turning the box body group where the box body of the adsorption tower is located to a cutting state, and simultaneously carrying out alarm display; when the maximum value reaches a third set value and exceeds a second preset time, the box body of the adsorption tower is judged to be in a hot spot state, the box body group where the box body of the adsorption tower is located automatically exits from the online state, and meanwhile, alarm display is carried out; the first set value is smaller than the second set value, and the second set value is smaller than the third set value; the first preset time is greater than the second preset time.
5. The intelligent optimized control system for desulfurization and denitrification of activated carbon as claimed in claim 4, wherein when the box body group exits from the online state, a nitrogen valve of the box body is automatically opened to start charging nitrogen into the box body of the adsorption tower; when the pressure in the box body of the adsorption tower reaches or is higher than a first preset pressure, automatically closing a nitrogen valve; when the pressure in the box body of the adsorption tower is lower than a second preset pressure, automatically opening a nitrogen valve to continuously charge nitrogen; the first preset pressure is greater than the second preset pressure.
6. The intelligent optimized control system for desulfurization and denitrification of activated carbon as claimed in claim 5, wherein when a hot spot is detected, the adsorption tower box set is allowed to be put into operation again only after a time delay of a preset time when the temperature is lower than the first set value, otherwise, the adsorption tower box set is prohibited from being put into operation.
7. The intelligent optimized control system for desulfurization and denitrification of activated carbon as claimed in claim 1, wherein the activated carbon charging control is a control in which activated carbon is charged into a discharge tank from a chain bucket machine through a discharge push rod and then charged into the adsorption tower tank body through the discharge tank; polling charging is carried out on the blanking tanks in different rows according to the running direction of the chain bucket machine and a set time sequence, when the blanking tanks are not full of signals, outlet valves of the blanking tanks are closed and polling signals come, charging of the blanking tanks is allowed, corresponding inlet valves of the blanking tanks are opened, and charging to the blanking tanks is started; stopping charging when the material dropping tank is full; and when the adsorption tower box body is not provided with a full material level signal, the corresponding blanking tank starts to charge the adsorption tower box body.
8. The intelligent optimized control system for desulfurization and denitrification of activated carbon as claimed in claim 1, wherein the activated carbon unloading control is to unload the activated carbon in the adsorption tower tank to the air lock hopper and then to unload the activated carbon from the air lock hopper to the chain bucket conveyor system; when the time for starting unloading is reached and the air lock hopper meets the unloading condition, the box body of the adsorption tower starts unloading to the air lock hopper.
9. The intelligent optimization control system for desulfurization and denitrification of activated carbon according to claim 1, wherein when the level of activated carbon in the desorption tower is higher than a set value, the frequency of the cooling fan is automatically increased, the temperature of activated carbon in the cooling section is reduced, the automatic PID adjustment of the temperature of the heating section is realized through the frequency control of the heating fan of the desorption tower, and the temperature of the heating section is controlled within a set range; and the PID adjustment of the degassing section temperature is automatically realized through the frequency control of the acid gas fan.
10. An intelligent optimization control method for desulfurization and denitrification of activated carbon, which is characterized in that the intelligent optimization control system for desulfurization and denitrification of activated carbon as claimed in any one of claims 1 to 9 is adopted, and comprises the following steps:
controlling the temperature, pressure and differential pressure of the flue gas; during temperature control, the temperature is adjusted according to the deviation between the actual measured value of the flue gas temperature and the set value of the flue gas temperature; during pressure and differential pressure control, adjusting according to a set value and a detection value of the differential pressure, wherein the differential pressure is the difference between the pressure of the inlet flue gas and the pressure of the outlet flue gas;
automatically analyzing and judging the charging sequence according to the charging time and interval of the activated carbon, the discharging time and interval of the activated carbon and the material level of the activated carbon;
the total amount of the activated carbon is adjusted, the discharging speed of the activated carbon is adjusted, and the ammonia spraying is automatically controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211454530.4A CN115729288A (en) | 2022-11-21 | 2022-11-21 | Intelligent optimization control system and method for desulfurization and denitrification of activated carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211454530.4A CN115729288A (en) | 2022-11-21 | 2022-11-21 | Intelligent optimization control system and method for desulfurization and denitrification of activated carbon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115729288A true CN115729288A (en) | 2023-03-03 |
Family
ID=85297442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211454530.4A Pending CN115729288A (en) | 2022-11-21 | 2022-11-21 | Intelligent optimization control system and method for desulfurization and denitrification of activated carbon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115729288A (en) |
-
2022
- 2022-11-21 CN CN202211454530.4A patent/CN115729288A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106422709A (en) | Ammonia spraying regulation automatic control method for denitrification system of thermal power plant | |
| CN115729288A (en) | Intelligent optimization control system and method for desulfurization and denitrification of activated carbon | |
| CN113593653B (en) | Wet desulfurization device overall economic benefit optimal control method | |
| CN112999857A (en) | Regulation and control method and regulation and control system for wide-load limestone slurry supply system | |
| CN109351119B (en) | Automatic control system and method for matching of regenerated gas of active coke and atmoseal nitrogen | |
| CN117160654A (en) | Coal-fired unit high-variable-load-rate operation pulverizing system and control method | |
| CN113655824B (en) | Wet desulphurization spraying amount and spraying slurry pH value coupling control optimization method | |
| CN209957709U (en) | Automatic agent unloading system of catalytic cracking regenerator | |
| CN212687907U (en) | Lime slurry preparation system for waste incineration | |
| CN110986021B (en) | Boiler overpressure protection system and control method thereof | |
| CN111534308A (en) | Method for controlling temperature of ultrahigh coke oven | |
| CN113736506B (en) | Automatic feeding and returning bisection control method, storage medium and system for cracking furnace | |
| CN113323853B (en) | Unmanned full-automatic control method for air compressor group of air compression station | |
| CN211896639U (en) | Temperature control system is administered to glass melting furnace flue gas | |
| SU1381094A1 (en) | Method of automatic control of lime production process | |
| CN108361731A (en) | Hot-water boiler air and flue system automation control method | |
| CN114455221A (en) | System and method for controlling tank top pressure of normal-pressure storage tank with nitrogen seal | |
| CN115253652B (en) | Desulfurization single-tower double-circulation automatic slurry supply control method and device | |
| CN219656635U (en) | Automatic control system for emergency wind of side-blowing furnace | |
| CN113816449A (en) | Zero-emission intelligent control system for desulfurization wastewater of thermal power generating unit | |
| KR100402000B1 (en) | Dry gas control apparatus in crush appratus for pulverized coal | |
| CN111425881B (en) | Method and system for reducing disturbance of start and stop of double-inlet and double-outlet coal mill on denitration system | |
| CN116449885A (en) | Automatic control system and method for emergency wind of side-blown converter | |
| CN116078280A (en) | Control system, method and medium for automatic and safe feeding of lithium sand | |
| CN111943529A (en) | Lime slurry preparation system for waste incineration and supply method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |