CN112642256A - Temperature control method and device for activated carbon desulfurization adsorption tower - Google Patents
Temperature control method and device for activated carbon desulfurization adsorption tower Download PDFInfo
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- CN112642256A CN112642256A CN201910968750.0A CN201910968750A CN112642256A CN 112642256 A CN112642256 A CN 112642256A CN 201910968750 A CN201910968750 A CN 201910968750A CN 112642256 A CN112642256 A CN 112642256A
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- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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Abstract
The application discloses active carbon desulfurization adsorption tower temperature control method and device acquires the temperature value of each temperature monitoring point in the adsorption tower in real time, calculates every according to the acquired temperature value the primary heating rate of temperature monitoring point, when the primary heating rate of at least one temperature monitoring point satisfies the preset early warning condition, carries out the discrimination once according to the preset corresponding relation of rate and grade to the risk grade of adsorption tower, carries out the control operation that the risk grade of hitting corresponds at last, in order to control the temperature of adsorption tower. According to the method, the overtemperature early warning of the adsorption tower is realized according to the heating rate, the risk grade of the temperature of the adsorption tower is judged according to the heating rate, the control operation corresponding to the hit risk grade is executed, and the early warning and judgment are not directly carried out according to the temperature value, so that the early warning time can be advanced, the phenomenon that the local temperature of the activated carbon bed layer is suddenly increased in a short time is avoided, and the reliability of the temperature control of the activated carbon bed layer is improved.
Description
Technical Field
The application relates to the technical field of sintering flue gas purification, in particular to a temperature control method and device for an activated carbon desulfurization adsorption tower.
Background
Iron and steel enterprises usually adopt the activated carbon flue gas purification technology to remove SO in sintering flue gas2And harmful components such as NOx, dust, dioxin, heavy metals and the like, thereby realizing the clean emission of waste gas of sintering plants of enterprises.
Fig. 1 shows an activated carbon flue gas purification system, which comprises an adsorption tower 1, a desorption tower 2, an acid making system 3, a buffer bin 4 for conveying activated carbon for the adsorption tower 1, a feeding device 5 at the bottom of the buffer bin, and a forward conveyor 61 for conveying the activated carbon for the buffer bin 4. When the system operates, the positive conveyor 61 conveys the activated carbon particles to the buffer bin 4, the feeding device 5 continuously works, the activated carbon particles in the buffer bin 4 are input to the adsorption tower 1, the activated carbon forms an activated carbon material column in the adsorption tower 1, and meanwhile, the to-be-purified flue gas 7 continuously enters the adsorption tower 1 and permeates into the activated carbon material column. In the column of activated carbon material, SO in the flue gas 7 to be purified2Adsorbed by active carbon, the flue gas 7 to be purified becomes clean flue gas 8; the discharging device 9 works continuously to enrich SO in the adsorption tower 12Is discharged to the conveyor 6 and is conveyed to the desorption tower 2 by the reverse conveyor 62, and SO desorbed in the desorption tower 2 is desorbed2The gas 10 enters the acid making system 3 to separate out SO2The activated carbon is transferred from the desorption tower 2 to the adsorption tower 1 for reuse.
Because the activated carbon has the properties of combustibility and flammability, the temperature of each local point of the adsorption tower is controlled in a safe range in the process of purifying sintering flue gas by using the activated carbon, which is particularly important. However, since activated carbon adsorbs SO2The process of pollutants is a heat release process, the initial temperature of the to-be-purified flue gas entering the adsorption tower is higher, generally 120-.
Disclosure of Invention
The application provides a temperature control method and device for an activated carbon desulfurization adsorption tower, which aim to solve the problem of temperature control of the desulfurization adsorption tower.
In a first aspect, the present application provides a method for controlling temperature of an activated carbon desulfurization adsorption tower, the method comprising:
acquiring temperature values of all temperature monitoring points in an adsorption tower in real time, wherein the temperature monitoring points are uniformly distributed on cross sections of active carbon material columns in the adsorption tower at different heights;
calculating the primary heating rate of each temperature monitoring point according to the obtained temperature value;
when the primary heating rate of at least one temperature monitoring point meets a preset early warning condition, judging the risk grade of the adsorption tower at least once according to the preset corresponding relation between the rate and the grade, wherein each risk grade corresponds to one control operation;
and executing control operation corresponding to the hit risk level to control the temperature of the adsorption tower.
Further, the at least one judgment of the risk level of the adsorption tower according to the preset corresponding relationship between the rate and the level includes:
if the first temperature rise rate K1E (a safety value and a general risk value), and hitting a general risk level;
if the first temperature rise rate K1E (general risk value and important risk value), hitting important risk level;
if the first temperature rise rate K1E (important risk value, infinity), hit the serious risk level;
wherein, K1The unit of (A) is ℃/min.
Further, the calculating a primary heating rate of the temperature monitoring point according to the temperature value at the temperature monitoring point includes:
according to the last acquired time tiTemperature value T ofiAnd, earlier than said time tiAt a time t of a predetermined time interval Δ ti-1Temperature value T ofi-1Calculating the primary heating rate K of the temperature monitoring point1。
Further, the method further comprises:
if the risk grade of the adsorption tower is judged to be the general risk grade or the important risk grade according to the primary heating rate, the temperature value T is usediAnd, time ti+1Temperature value T ofi+1Calculating the secondary heating rate K of the temperature monitoring point2Said time ti+1Is later than the time tiPresetting the time of a time interval delta t;
according to the secondary heating rate K2Carrying out second judgment on the risk level of the adsorption tower;
and if the hit risk level is the general risk level or the important risk level, executing a control operation corresponding to the general risk level or the important risk level.
Further, the method further comprises:
if the risk grade of the adsorption tower is judged to be the common risk grade according to the secondary heating rate, the temperature value T is usedi+1And, time ti+2Temperature value T ofi+2And calculating the three-time heating rate K of the temperature monitoring point3Said time ti+2Is later than the time ti+1Presetting the time of a time interval delta t;
according to the third heating rate K3Judging the risk grade of the adsorption tower for the third time;
and if the hit risk level is the general risk level, executing the control operation corresponding to the general risk level.
Further, according to the difference of the risk level of the discrimination hit, the executed control operations are respectively:
if the general risk level is judged to be hit, the feeding speed of the activated carbon is increased to 1.2-1.5 times of the current feeding speed, and the temperature of the to-be-purified flue gas entering the adsorption tower is reduced by 5 ℃;
if the important risk level is judged to be hit, the temperature of the flue gas to be purified entering the adsorption tower is reduced by 10 ℃;
and if the serious risk grade is judged to be hit, stopping inputting the flue gas to be purified to the adsorption tower, and introducing protective gas to the adsorption tower.
Further, when the primary heating rates of a plurality of temperature monitoring points meet a preset early warning condition, judging the risk level of the adsorption tower according to the highest value in the primary heating rates.
Further, when the primary heating rate of at least one temperature monitoring point is greater than a preset safety value, the primary heating rate meets the preset early warning condition.
Further, after the input of the flue gas to be purified to the adsorption tower is stopped and the protective gas is introduced to the adsorption tower, the method further comprises the following steps: and stopping the adsorption tower for overhauling.
In a second aspect, the present application further provides an activated carbon desulfurization adsorption tower temperature control device, the device comprising:
the temperature acquisition unit is used for acquiring temperature values of a plurality of temperature monitoring points in the adsorption tower in real time, and the temperature monitoring points are uniformly distributed on cross sections of the activated carbon material column in the adsorption tower at different heights;
the calculation unit is used for calculating the primary heating rate of each temperature monitoring point according to the acquired temperature value;
the grade judging unit is used for judging the risk grade of the adsorption tower at least once according to the preset corresponding relation between the rate and the grade when the primary heating rate of at least one temperature monitoring point meets the preset early warning condition, and each risk grade corresponds to one control operation;
and the control unit is used for executing control operation corresponding to the hit risk level so as to control the temperature of the adsorption tower.
According to the technical scheme, the temperature values of all temperature monitoring points in the adsorption tower are obtained in real time, each temperature rising rate of the temperature monitoring points is calculated according to the obtained temperature values, when the temperature rising rate of at least one temperature monitoring point meets the preset early warning condition, the risk grade of the adsorption tower is judged once according to the preset corresponding relation between the rate and the grade, and finally the control operation corresponding to the hit risk grade is executed to control the temperature of the adsorption tower. According to the method, the overtemperature early warning of the adsorption tower is realized according to the heating rate, the risk grade of the temperature of the adsorption tower is judged according to the heating rate, the control operation corresponding to the hit risk grade is executed, and the early warning and judgment are not directly carried out according to the temperature value, so that the early warning time can be advanced, the phenomenon that the local temperature of the activated carbon bed layer is suddenly increased in a short time is avoided, and the reliability of the temperature control of the activated carbon bed layer is improved.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
FIG. 1 is an activated carbon flue gas cleaning system according to an exemplary embodiment of the present application;
FIG. 2 is a schematic diagram illustrating an adsorption column activated carbon column temperature increase profile according to an exemplary embodiment of the present application;
FIG. 3 is a flow chart illustrating a method for temperature control of an activated carbon desulfurization adsorption tower according to an exemplary embodiment of the present application;
FIG. 4a is a schematic diagram of an adsorption column configuration shown herein according to an exemplary embodiment;
FIG. 4b is a schematic representation of a temperature monitoring point distribution across a cross-section of an activated carbon column according to an exemplary embodiment of the present application;
FIG. 5 is a flow chart illustrating a method for temperature control of an activated carbon desulfurization adsorption tower according to another exemplary embodiment of the present application;
FIG. 6 is a flow chart illustrating a method for temperature control of an activated carbon desulfurization adsorption tower according to another exemplary embodiment of the present application;
FIG. 7 is a block diagram of an activated carbon desulfurization adsorption tower temperature control device according to an exemplary embodiment of the present application.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
As described in the background of the present application, because activated carbon is flammable and combustible, it is particularly important to control the temperature of each local point of the adsorption tower within a safe range during the process of purifying sintering flue gas by using activated carbon.
One possible control method is to monitor the temperature changes of different parts of the activated carbon bed layer in the adsorption tower in real time during the operation of the system shown in fig. 1, and to take corresponding safety precautions when the monitored temperature reaches the upper limit value of the safety range. It can be seen that the control method directly uses the temperature monitoring result as the control basis, and is difficult to identify the dangerous situation in time and quickly, so that risk identification, judgment and risk solution are delayed from the actual situation.
Fig. 2 is a schematic diagram of an activated carbon column temperature rise curve obtained after analyzing and summarizing abnormal temperature condition data of an adsorption tower activated carbon column in multiple projects and multiple working conditions, as shown in fig. 2, under normal conditions, the bed temperature is stabilized at 133-134 ℃, and due to fluctuation of inlet flue gas working conditions and/or difficulty in discharging heat accumulated in the bed due to untimely discharge of activated carbon materials, and the like, in a 20-30min stage, the bed shows slow temperature rise and gradually rises to a dangerous value of 155 ℃, at this time, even if corresponding safety measures are taken by the system, the local temperature of the activated carbon bed still increases to be close to 190 ℃ in a short time before the safety measures play a role, and the local temperature of the activated carbon bed is uncontrollable in a short time.
Therefore, in order to timely generate early warning when the activated carbon bed layer of the adsorption tower is overtemperature and timely execute the control action of safety precaution, the application provides the temperature control method of the activated carbon desulfurization adsorption tower.
FIG. 3 is a flow chart illustrating a method for controlling temperature of an activated carbon desulfurization adsorption tower according to an exemplary embodiment of the present application, and as shown in FIG. 3, the method may include:
Fig. 4a is a schematic structural diagram of an adsorption tower according to an exemplary embodiment of the present application, as shown in fig. 4a, in the present application, a plurality of temperature monitoring points are uniformly distributed on cross sections of different heights of an activated carbon column in the adsorption tower, for example, the cross sections of the upper, middle and lower three heights shown in fig. 4a, and optionally, on the cross section of each height, the plurality of temperature monitoring points are distributed in a grid shape as shown in fig. 4b, so as to achieve overall monitoring of each local part of the activated carbon column.
As shown in fig. 4a, temperature monitoring devices 40 are arranged on the cross sections of the activated carbon material column at different heights for acquiring the temperature values at the temperature monitoring points on the cross section at the height in real time.
In specific implementation, the temperature value is obtained once every preset time interval Δ T, for example, for each temperature monitoring point, the temperature value T1 at the time T1 is obtained, the temperature values T2 and … … at the time T2 are obtained, and the temperature value Ti at the time Ti is obtained, where the time interval between every two adjacent times is Δ T.
And 102, calculating the primary heating rate of each temperature monitoring point according to the acquired temperature value.
Specifically, at the acquisition time tiTemperature value T ofiThen, according to the time tiTemperature value T ofiAnd, earlier than said time tiAt a time t of a predetermined time interval Δ ti-1Temperature value T ofi-1Calculating the primary heating rate K of the temperature monitoring point according to the following formula1：
And 103, judging whether the primary heating rate of at least one temperature monitoring point meets a preset early warning condition, if so, executing step 104, and if not, executing step 101.
The preset early warning condition may be a temperature rise rate safety value, for example, 0.2 ℃/min, and when the one-time temperature rise rate of a certain temperature monitoring point at a certain time is higher than 0.2 ℃/min, it is determined that the one-time temperature rise rate of the temperature monitoring point meets the early warning condition.
It should be noted that, since the present application monitors the temperature rising rates of a plurality of temperature monitoring points at the same time, a situation that the primary temperature rising rates of the plurality of temperature monitoring points simultaneously satisfy the preset early warning condition may occur, and then, in step 103, when the primary temperature rising rate of at least one temperature monitoring point satisfies the preset early warning condition, step 104 is executed.
And 104, judging the risk grade of the adsorption tower once according to the preset corresponding relation between the speed and the grade, wherein each risk grade corresponds to one control operation.
In the process of realizing the method, the inventor analyzes and summarizes a large number of temperature rise rates of the adsorption towers and corresponding risk coefficient data in different projects and under various working conditions to obtain quantitative correlation between the temperature rise rates and risk levels, namely the preset corresponding relationship between the rates and the levels in the method. Specifically, in the preset corresponding relationship:
when the temperature rise rate (unit:. degree.C/min) K ∈ (safety value, general risk value), then hit the general risk grade, wherein the safety value can be 0.2 degree/min, the general risk value can be 0.5 degree/min;
when the temperature rise rate K belongs to (a general risk value and an important risk value), hitting an important risk level, wherein the important risk value can be 0.8 ℃/min;
when the temperature increase rate K ∈ (important risk value, ∞), a serious risk level is hit.
It can be seen from the preset corresponding relationship between the rate and the grade that the higher the heating rate is, the higher the risk grade is.
It is worth noting that in the application, each risk level corresponds to one control operation, so that when the adsorption tower is in different risk levels, different control operations are executed, and when the risk levels change, the adopted measures are adjusted, so that the temperature change in the temperature control process is stable, the change trend is reliable, and meanwhile, the efficiency is high.
It should be noted that, when the primary temperature-rise rates of a plurality of temperature monitoring points all meet the preset early warning condition, the highest value is selected from a plurality of primary temperature-rise rate data, and the risk level of the adsorption tower is judged according to the highest value in the plurality of primary temperature-rise rates.
And 105, executing control operation corresponding to the risk level of the primary judgment hit so as to control the temperature of the adsorption tower.
Specifically, as a possible implementation manner, if the general risk level is determined, the feeding speed of the activated carbon is increased to 1.2-1.5 times of the current feeding speed, and meanwhile, the temperature of the flue gas to be purified is reduced by 5 ℃ at the flue gas inlet of the adsorption tower in a manner of adding cold air or atomizing and spraying water and the like. If the important risk level is judged to be hit, the temperature of the flue gas to be purified is reduced by 10 ℃ at the flue gas inlet of the adsorption tower in a cold air charging or atomizing water spraying mode and the like. If the serious risk level is judged to be hit, the flue gas to be purified is stopped from being input into the adsorption tower, protective gas such as nitrogen is introduced into the adsorption tower, in addition, if the serious risk level is judged to be hit, the adsorption tower needs to be stopped and overhauled, and equipment faults are discovered and eliminated in time.
Known by the above embodiment, the temperature control method for the activated carbon desulfurization adsorption tower provided by the application obtains the temperature value of each temperature monitoring point in the adsorption tower in real time, calculates each temperature rise rate of the temperature monitoring point according to the obtained temperature value, and when the temperature rise rate of at least one temperature monitoring point meets the preset early warning condition, judges the risk level of the adsorption tower once according to the preset corresponding relation between the rate and the level, and finally executes the control operation corresponding to the hit risk level to control the temperature of the adsorption tower.
According to the method, the overtemperature early warning of the adsorption tower is realized according to the heating rate, the risk grade of the temperature of the adsorption tower is judged according to the heating rate, the control operation corresponding to the hit risk grade is executed, and the early warning and judgment are not directly carried out according to the temperature value, so that the early warning time can be advanced, the phenomenon that the local temperature of the activated carbon bed layer is suddenly increased in a short time is avoided, and the reliability of the temperature control of the activated carbon bed layer is improved.
On the basis of the above embodiment, in another embodiment, in order to avoid the influence of production process fluctuation on the control method of the present application and to improve the accuracy of the judgment of the risk level of the present application, fig. 5 shows another embodiment of the temperature control method of the activated carbon desulfurization adsorption tower of the present application, in which when the adsorption tower is judged to be at the general risk level or the important risk level through the first judgment, in order to improve the judgment accuracy and avoid the misoperation, the second judgment is performed. Referring to fig. 5, an embodiment of the present application may include the steps of:
Wherein, the time tiIs a time closest to the current time, which is the time tiAnd time ti+1The time in between.
Step 204, according to the primary heating rate K1And, the preset corresponding relation between the speed and the grade is used for carrying out first judgment on the risk grade of the adsorption tower, if the general risk grade or the important risk grade is hit, the step 205 is executed, and if the serious risk grade is hit, the step 209 is executed.
Specifically, step 204 includes step 204-1, step 204-2, and step 204-3.
In step 204-1, according to K1Whether the general risk level is hit is determined for the first time, if yes, step 205 is executed, and if not, no processing is performed.
In step 204-2, according to K1Whether the important risk level is hit is judged for the first time, if yes, step 205 is executed, and if not, no processing is performed.
In step 204-3, according to K1The first time, whether the serious risk level is hit is determined, if yes, step 209 is executed, and if not, no processing is performed.
Step 206, according to the secondary heating rate K2And carrying out second judgment on the risk level of the adsorption tower.
Specifically, step 206 includes step 206-1 and step 206-2.
In step 206-1, according to K2The second determination is made whether the general risk level is hit, if yes, step 207 is executed, otherwise, step 203 is returned to.
In step 206-2, according to K2And judging whether the important risk level is hit for the second time, if so, executing the step 208, and if not, returning to the step 203.
In addition, after step 209, the adsorption tower needs to be shut down for maintenance, so that equipment faults can be timely found and eliminated. And, after step 207 or step 208 is executed, go back to step 203.
Known from the above embodiment, the temperature control method for the activated carbon desulfurization adsorption tower provided by the application obtains the temperature value of each temperature monitoring point in the adsorption tower in real time, calculates each temperature rise rate of the temperature monitoring point according to the obtained temperature value, when the temperature rise rate of at least one temperature monitoring point meets the preset early warning condition, carries out the first judgment on the risk level of the adsorption tower according to the preset corresponding relation between the rate and the level, and when judging that the adsorption tower is in a general risk level or an important risk level through the first judgment, in order to improve the judgment accuracy, avoids misoperation, carries out the second judgment, and finally carries out the control operation corresponding to the hit risk level so as to control the temperature of the adsorption tower. The method can advance the early warning time, avoid the phenomenon that the local temperature of the activated carbon bed layer is sharply increased in a short time, and improve the reliability of controlling the temperature of the activated carbon bed layer.
Based on the above embodiments, fig. 6 shows another embodiment of the temperature control method for an activated carbon desulfurization adsorption tower of the present application, in which when the adsorption tower is judged to be at a general risk level through the first and second judgments, in order to improve the judgment accuracy and avoid misoperation, the third judgment is performed. Referring to fig. 6, an embodiment of the present application may include the steps of:
Wherein, the time tiIs a time closest to the current time, which is the time tiAnd time ti+1The time in between.
304, according to the one-time heating rate K1And, the preset corresponding relation between the speed and the grade is used for carrying out first judgment on the risk grade of the adsorption tower, if the general risk grade or the important risk grade is hit, the step 305 is executed, and if the serious risk grade is hit, the step 311 is executed.
Specifically, step 304 includes step 304-1, step 304-2, and step 304-3.
In step 304-1, according to K1The first time to determine whether the general risk level is hit, if yes, step 305 is executed, otherwise, no processing is performed.
In step 304-2, according to K1Whether the important risk level is hit is judged for the first time, if yes, step 305 is executed, and if not, no processing is performed.
In step 304-3, according to K1Whether the serious risk level is hit is judged for the first time, if yes, step 311 is executed, and if not, no processing is performed.
305, according to the temperature value TiAnd, time ti+1Temperature value T ofi+1Calculating the secondary heating rate K of the temperature monitoring point2. Wherein, the time ti+1Is later than the time tiThe time of the preset time interval Δ t.
Step 306, according to the secondary heating rate K2And carrying out second judgment on the risk level of the adsorption tower.
Specifically, step 306 includes step 306-1 and step 306-2.
In step 306-1, according to K2And judging whether the general risk level is hit for the second time, if so, executing the step 307, and if not, returning to the step 303.
In step 306-2, according to K2And judging whether the important risk level is hit for the second time, if so, executing the step 310, and if not, returning to the step 303.
308, according to the third heating rate K3And (4) judging the risk level of the adsorption tower for the third time, if the risk level of the adsorption tower is hit, executing the step 309, and if not, returning to the step 303.
In addition, after step 311, the adsorption tower needs to be shut down for maintenance, so that equipment failure can be timely discovered and eliminated. And, after performing step 309 or step 310, returning to step 303.
From the above embodiments, the temperature control method for the activated carbon desulfurization adsorption tower provided by the application can obtain the temperature values of the temperature monitoring points in the adsorption tower in real time, calculating the primary heating rate of each temperature monitoring point according to the obtained temperature value, when the primary heating rate of at least one temperature monitoring point meets the preset early warning condition, the risk grade of the adsorption tower is judged for the first time according to the preset corresponding relation between the speed and the grade, when the adsorption tower is judged to be in the general risk grade or the important risk grade through the first judgment, in order to improve the judgment accuracy and avoid misoperation, the second judgment is executed, and when the adsorption tower is judged to be in the common risk level through two times of judgment, executing third judgment, and finally executing control operation corresponding to the hit risk level so as to control the temperature of the adsorption tower. The method can advance the early warning time, avoid the phenomenon that the local temperature of the activated carbon bed layer is sharply increased in a short time, and improve the reliability of controlling the temperature of the activated carbon bed layer.
According to the method for controlling the temperature of the activated carbon desulfurization adsorption tower provided by the present application, an embodiment of the present application further provides a temperature control device of the activated carbon desulfurization adsorption tower, and fig. 7 is a block diagram of the temperature control device of the activated carbon desulfurization adsorption tower according to an exemplary embodiment of the present application, and as shown in fig. 7, the device may include:
the temperature acquisition unit 701 is used for acquiring temperature values of a plurality of temperature monitoring points in the adsorption tower in real time, wherein the temperature monitoring points are uniformly distributed on cross sections of the activated carbon material column in the adsorption tower at different heights; a calculating unit 702, configured to calculate a primary temperature increase rate of each temperature monitoring point according to the obtained temperature value; the grade judging unit 703 is configured to judge, at least once, a risk grade of the adsorption tower according to a preset corresponding relationship between a rate and a grade when the primary heating rate of at least one temperature monitoring point meets a preset early warning condition, where each risk grade corresponds to one control operation; a control unit 704, configured to perform a control operation corresponding to the hit risk level to control the temperature of the adsorption tower.
In an embodiment, the level determination unit 703 is specifically configured to determine if the one-time temperature-rising rate K is greater than or equal to the first temperature-rising rate K1E (a safety value and a general risk value), and hitting a general risk level; if the first temperature rise rate K1E (general risk value and important risk value), hitting important risk level; if the first temperature rise rate K1E (important risk value, infinity), hit the serious risk level; wherein, K1The unit of (A) is ℃/min.
In one embodiment, the calculation unit 702 is specifically configured to obtain the time t according to the latest acquisitioniTemperature value T ofiAnd, earlier than said time tiAt a time t of a predetermined time interval Δ ti-1Temperature value T ofi-1Calculating the primary heating rate K of the temperature monitoring point1。
In an embodiment, the calculation unit 702 is further configured to calculate a temperature value T based on the temperature value TiAnd, time ti+1Temperature value T ofi+1Calculating the secondary heating rate K of the temperature monitoring point2Said time ti+1Is later than the time tiPresetting the time of a time interval delta t; the grade discrimination unit 703 is further configured to determine the second heating rate K2And carrying out second judgment on the risk level of the adsorption tower.
In an embodiment, the calculation unit 702 is further configured to calculate a temperature value T based on the temperature value Ti+1And, time ti+2Temperature value T ofi+2And calculating the three-time heating rate K of the temperature monitoring point3Said time ti+2Is later than the time ti+1Presetting the time of a time interval delta t; the grade discrimination unit 703 is further configured to determine the third heating rate K3And judging the risk grade of the adsorption tower for the third time.
In one embodiment, the control unit 704 is specifically configured to, if it is determined that the general risk level is hit, increase the feeding speed of the activated carbon to 1.2 to 1.5 times of the current feeding speed, and reduce the temperature of the flue gas to be purified entering the adsorption tower by 5 ℃; if the important risk level is judged to be hit, the temperature of the flue gas to be purified entering the adsorption tower is reduced by 10 ℃; and if the serious risk grade is judged to be hit, stopping inputting the flue gas to be purified to the adsorption tower, and introducing protective gas to the adsorption tower.
In one embodiment, when the primary heating rates of a plurality of temperature monitoring points meet a preset early warning condition, the level determination unit 703 determines the risk level of the adsorption tower according to the highest value of the plurality of primary heating rates.
According to the embodiment, the temperature values of all temperature monitoring points in the adsorption tower are obtained in real time, the primary heating rate of each temperature monitoring point is calculated according to the obtained temperature values, when the primary heating rate of at least one temperature monitoring point meets the preset early warning condition, the risk grade of the adsorption tower is judged once according to the preset corresponding relation between the rate and the grade, and finally the control operation corresponding to the hit risk grade is executed to control the temperature of the adsorption tower.
According to the method, the overtemperature early warning of the adsorption tower is realized according to the heating rate, the risk grade of the temperature of the adsorption tower is judged according to the heating rate, the control operation corresponding to the hit risk grade is executed, and the early warning and judgment are not directly carried out according to the temperature value, so that the early warning time can be advanced, the phenomenon that the local temperature of the activated carbon bed layer is suddenly increased in a short time is avoided, and the reliability of the temperature control of the activated carbon bed layer is improved.
In a specific implementation, the present invention further provides a computer storage medium, where the computer storage medium may store a program, and the program may include some or all of the steps in the embodiments of the calling method provided by the present invention when executed. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM) or a Random Access Memory (RAM).
Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
The same and similar parts in the various embodiments in this specification may be referred to each other. In particular, for the embodiment of the temperature control device of the activated carbon desulfurization adsorption tower, the description is simple because the embodiment is basically similar to the embodiment of the method, and the relevant points can be referred to the description in the embodiment of the method.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention.
Claims (10)
1. A temperature control method for an activated carbon desulfurization adsorption tower is characterized by comprising the following steps:
acquiring temperature values of all temperature monitoring points in an adsorption tower in real time, wherein the temperature monitoring points are uniformly distributed on cross sections of active carbon material columns in the adsorption tower at different heights;
calculating the primary heating rate of each temperature monitoring point according to the obtained temperature value;
when the primary heating rate of at least one temperature monitoring point meets a preset early warning condition, judging the risk grade of the adsorption tower at least once according to the preset corresponding relation between the rate and the grade, wherein each risk grade corresponds to one control operation;
and executing control operation corresponding to the hit risk level to control the temperature of the adsorption tower.
2. The method of claim 1, wherein the determining the risk level of the adsorption tower at least once according to the preset corresponding relationship between the rate and the level comprises:
if the first temperature rise rate K1E (a safety value and a general risk value), and hitting a general risk level;
if the first temperature rise rate K1E (general risk value and important risk value), hitting important risk level;
if the first temperature rise rate K1E (important risk value, infinity), hit the serious risk level;
wherein, K1The unit of (A) is ℃/min.
3. The method of claim 2, wherein calculating a temperature ramp rate for the temperature monitoring point from the temperature value at the temperature monitoring point comprises:
according to the last acquired time tiTemperature value T ofiAnd, earlier than said time tiAt a time t of a predetermined time interval Δ ti-1Temperature value T ofi-1Calculating the primary heating rate K of the temperature monitoring point1。
4. The method of claim 3, further comprising:
if the risk grade of the adsorption tower is judged to be the general risk grade or the important risk grade according to the primary heating rate, the temperature value T is usediAnd, time ti+1Temperature value T ofi+1Calculating the secondary heating rate K of the temperature monitoring point2Said time ti+1Is later than the time tiPresetting the time of a time interval delta t;
according to the secondary heating rate K2Carrying out second judgment on the risk level of the adsorption tower;
and if the hit risk level is the general risk level or the important risk level, executing a control operation corresponding to the general risk level or the important risk level.
5. The method of claim 4, further comprising:
if the risk grade of the adsorption tower is judged to be the common risk grade according to the secondary heating rate, the temperature value T is usedi+1And, time ti+2Temperature value T ofi+2And calculating the three-time heating rate K of the temperature monitoring point3Said time ti+2Is later than the time ti+1Presetting the time of a time interval delta t;
according to the third heating rate K3Judging the risk grade of the adsorption tower for the third time;
and if the hit risk level is the general risk level, executing the control operation corresponding to the general risk level.
6. The method according to any of claims 1-5, characterized in that, depending on the level of risk of the discriminant hit, the control operations performed are:
if the general risk level is judged to be hit, the feeding speed of the activated carbon is increased to 1.2-1.5 times of the current feeding speed, and the temperature of the to-be-purified flue gas entering the adsorption tower is reduced by 5 ℃;
if the important risk level is judged to be hit, the temperature of the flue gas to be purified entering the adsorption tower is reduced by 10 ℃;
and if the serious risk grade is judged to be hit, stopping inputting the flue gas to be purified to the adsorption tower, and introducing protective gas to the adsorption tower.
7. The method according to any one of claims 1 to 5, wherein when the primary heating rates of a plurality of temperature monitoring points meet a preset early warning condition, the risk level of the adsorption tower is judged according to the highest value of the primary heating rates.
8. The method according to any one of claims 1 to 5, wherein the primary heating rate of at least one temperature monitoring point satisfies the preset pre-warning condition when the primary heating rate is greater than a preset safety value.
9. The method according to claim 6, wherein after the inputting of the flue gas to be purified to the adsorption tower is stopped and the protective gas is introduced to the adsorption tower, the method further comprises: and stopping the adsorption tower for overhauling.
10. An activated carbon desulfurization adsorption tower temperature control device, characterized in that the device includes:
the temperature acquisition unit is used for acquiring temperature values of a plurality of temperature monitoring points in the adsorption tower in real time, and the temperature monitoring points are uniformly distributed on cross sections of the activated carbon material column in the adsorption tower at different heights;
the calculation unit is used for calculating the primary heating rate of each temperature monitoring point according to the acquired temperature value;
the grade judging unit is used for judging the risk grade of the adsorption tower at least once according to the preset corresponding relation between the rate and the grade when the primary heating rate of at least one temperature monitoring point meets the preset early warning condition, and each risk grade corresponds to one control operation;
and the control unit is used for executing control operation corresponding to the hit risk level so as to control the temperature of the adsorption tower.
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