CN114441064A - Double-hearth limekiln suspension cylinder temperature monitoring method and system and storage medium - Google Patents
Double-hearth limekiln suspension cylinder temperature monitoring method and system and storage medium Download PDFInfo
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- 239000000725 suspension Substances 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000012544 monitoring process Methods 0.000 title claims abstract description 52
- 238000003860 storage Methods 0.000 title claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 75
- 230000002159 abnormal effect Effects 0.000 claims abstract description 41
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 40
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 40
- 239000004571 lime Substances 0.000 claims abstract description 40
- 238000009529 body temperature measurement Methods 0.000 claims description 42
- 238000004590 computer program Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 238000012546 transfer Methods 0.000 claims description 11
- 238000012937 correction Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 238000005192 partition Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
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- 238000007599 discharging Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
- G01K13/024—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow of moving gases
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/12—Preheating, burning calcining or cooling in shaft or vertical furnaces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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Abstract
The invention discloses a method and a system for monitoring the temperature of a suspension cylinder of a double-hearth lime kiln and a storage medium, wherein the method comprises the following steps: s1, acquiring the wind temperature t of each temperature measuring point i in the airflow cooling flow channel of the suspension cylinderi(ii) a S2, calculating to obtain an estimated average wall surface temperature T 'of the suspension cylinder'w(ii) a S3, calculating logarithmic temperature rise a of temperature measuring interval jj(ii) a According to logarithmic temperature rise ajCorresponding logarithmic temperature rise curve, determining the logarithmic temperature rise a deviating from the preset threshold value on the logarithmic temperature rise curvejAnd acquiring a temperature measuring interval corresponding to the abnormal temperature rise as an overtemperature area for the abnormal temperature rise. The invention relates to a method for monitoring the temperature of a suspension cylinder of a double-chamber lime kiln, which utilizes a mean value checking method and a pairThe change of several temperature rises makes the temperature rise signal between the local overtemperature area take place the dominant change, confirms the local overtemperature area, and is more sensitive to the seizure and the monitoring of hanging jar local overtemperature, can provide timely early warning for the production field to effectively prolong and hang jar operation life.
Description
1 in the technical field
The invention relates to the technical field of temperature monitoring of a double-hearth lime kiln suspension cylinder, in particular to a method and a system for monitoring the temperature of the double-hearth lime kiln suspension cylinder and a storage medium.
2 background of the invention
The double-chamber lime kiln is one of the most advanced lime production equipment at present, and is widely applied to the production of industrial lime and building lime. The device mainly comprises two vertical kiln chambers which are in mirror image with each other, and during the production process, pulverized coal and combustion-supporting air are supplied to the kiln chamber at one side to form a high-temperature environment, so that limestone in the kiln chamber is decomposed at high temperature, and the device is called as a calcining chamber; and filling normal-temperature materials into the kiln chamber on the other side, introducing high-temperature flue gas formed by the combustion chamber from the bottom, and discharging the high-temperature flue gas from the top to achieve the effect of preheating the materials, wherein the kiln chamber on the side is called a heat storage chamber. After one period (about 14min), the two kiln chambers exchange roles with each other, and the continuous production of lime is realized. Because the process of double-hearth calcination-periodic reversing is adopted, high-temperature flue gas generated by calcination and high-temperature waste gas formed by cooling finished products are used for preheating materials and then discharged out of a kiln hearth, and the temperature of the discharged flue gas can be reduced to about 120 ℃ generally, so that the high-temperature kiln has high heat utilization rate.
In the prior art, a suspended cylinder type annular channel is arranged between a combustion chamber and a heat storage chamber, and air passages of two parallel kiln chambers are communicated with each other, so that high-temperature flue gas can smoothly flow into the other chamber from one chamber. The annular through pipe of the suspension cylinder type is formed by surrounding an inner layer steel shell and an outer layer steel shell, and a fireproof and heat-insulating material is built or poured outside the steel shells. An annular cavity is formed in the two steel shells, and because the working temperature outside the refractory material reaches 1100 ℃, in order to avoid the strength reduction of steel at high temperature, forced ventilation and temperature reduction are generally needed to the annular cavity so as to ensure that the temperature of the steel shells is not too high. In the production process, the heat insulation material outside the steel shell is worn or cracked, so that the local temperature of the steel shell is over-limited, and the structure is failed and damaged. Therefore, the temperature monitoring and early warning of the suspension cylinder shell are very important.
At present, a method of arranging a thermocouple thermometer at a local position is mainly adopted for monitoring, the temperature of a whole suspension cylinder is replaced by the temperature of a plurality of local points, and when the temperature of a temperature measuring point exceeds the temperature, an early warning is sent out, but when the local temperature exceeds the temperature at a position outside the temperature measuring point, the early warning cannot be effectively carried out, so that the technical problem that the operation life of the suspension cylinder is influenced by the local temperature exceeding cannot be effectively captured.
Disclosure of the invention
The invention provides a method for monitoring the temperature of a suspension cylinder of a double-chamber lime kiln, which solves the technical problem that the local overtemperature cannot be effectively captured during the temperature monitoring of the conventional suspension cylinder.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for monitoring the temperature of a suspension cylinder of a double-chamber lime kiln is characterized in that a plurality of temperature measuring points are arranged in an airflow cooling flow channel of the suspension cylinder, the lengths of flow lines between two adjacent temperature measuring points are the same, i is defined as the serial number of the temperature measuring points, and i belongs to [0, N ]]The temperature measuring points are numbered in sequence along the airflow direction in the airflow cooling flow channel, 0 represents the number of the first temperature measuring point, and N represents the number of the last temperature measuring point; defining N +1 temperature measuring points, dividing the airflow cooling flow channel into N temperature measuring intervals j, j being i +1, j being E [1, N ∈]J is the number of the temperature measuring interval, and the number of the temperature measuring interval between the temperature measuring point i and the temperature measuring point i +1 is j, the method comprises the following steps: s1, acquiring the wind temperature ti of each temperature measuring point i in the airflow cooling flow channel of the suspension cylinder; s2, calculating to obtain estimated average wall surface temperature T 'of the suspension cylinder according to wind temperature ti of each temperature measuring point'w(ii) a S3, using formula aj＝ln(T′w- ti+1)-ln(T′w-ti) Calculating the logarithmic temperature rise a of the temperature measuring interval jj(ii) a According to logarithmic temperature rise ajCorresponding logarithmic temperature rise curve, determining the logarithmic temperature rise a deviating from the preset threshold value on the logarithmic temperature rise curvejAnd acquiring a temperature measuring interval corresponding to the abnormal temperature rise as an overtemperature area for the abnormal temperature rise.
Further, in step S2, a formula is adopted
Calculating to obtain an estimated average wall surface temperature T 'of the suspension cylinder'wWherein, T'wRepresenting the estimated mean wall temperature, t0Denotes the wind temperature at the temperature measuring point at the inlet of the airflow cooling channel, tN denotes the wind temperature at the temperature measuring point at the outlet of the airflow cooling channel, h is the heat transfer coefficient between the cooling airflow and the wall surface, A is the total heat transfer area, m is the wind flow rate of the cooling airflow, cpIs the specific heat of wind.
Further, step S3 specifically includes: s31, using formula aj＝ln(T′w-ti+1)-ln(T′w-ti) Calculating the logarithmic temperature rise a of the temperature measuring interval jj(ii) a S32, for logarithmic temperature rise ajIs subjected to linear fitting to obtain a first fitted linear line, y1＝c1·x1+b1(ii) a S33, obtaining each logarithmic temperature rise ajCorresponding fitting projection distance d on the first fitting linear linej(ii) a S34, projecting the distance d according to the fittingjObtaining an average projection value d'; s35, adopting a preset formula
From each logarithmic rise of temperature ajThe logarithmic temperature rise a corresponding to the preset formula is obtainedjFor abnormal temperature rise, wherein the first threshold value k1Has a value in the range of 1.5 to 3; and S36, determining the area corresponding to the abnormal temperature rise as an over-temperature area.
Further, the method also comprises the following steps: s41, raising the temperature a from each logarithmjRemoving all abnormal temperature rises and then performing linear fitting again to obtain a second fitting linear line y2＝c2·x2+b2(ii) a S5, using the formula
Calculating to obtain the local temperature T corresponding to each abnormal temperature risewc(i+1)。
Further, after step S41, the method further includes: s42, judging the estimated average wall surface temperature T'wAnd the actual average wall temperature TwWhether the error of (2) is within a preset error value range; if the average wall surface temperature T 'is estimated'wAnd the actual average wall temperature TwIs within the preset error value range, the process proceeds to step S5.
Further, step S42 specifically includes: s421, obtaining the slope of the second fitting linear line and the relative control error level parameter k2The correlation of (2); s422, if | c2|≤k2Determining the estimated average wall temperatureT′wAnd the actual average wall temperature TwThe error therebetween is within the preset error value range, and the process proceeds to step S5; s423, if | c2|＞k2Determining an estimated average wall temperature T'wAnd the actual average wall temperature TwThe error between the two is not in the range of the preset error value, and a formula is adopted
Calculating to obtain a temperature correction value delta T, wherein M is a serial number of a last temperature measurement interval arranged after the overtemperature area is removed, aMIs the logarithmic temperature rise of the temperature measurement interval M, F is the serial number of the first temperature measurement interval after the overtemperature area is eliminated, aFLogarithmic temperature rise, t, of temperature range FMIs the wind temperature, t, of the temperature measuring point numbered MM-1Is the wind temperature, t, of the temperature measuring point numbered M-1FIs the wind temperature, t, of the temperature measuring point numbered FF-1The number is F-1; using the formula Tw＝ΔT+T′wCalculating to obtain corrected wall temperature TwWill correct the wall temperature TwSubstitute for estimated mean wall temperature T'wAnd proceeds to step S3.
The invention also provides a double-hearth lime kiln suspension cylinder temperature monitoring system which comprises temperature sensors and suspension cylinders with airflow cooling runners, wherein the temperature sensors and temperature measuring points are arranged in a one-to-one correspondence manner, the temperature sensors are used for monitoring the temperatures of the corresponding temperature measuring points, the temperature sensors are arranged at intervals along the extension direction of the airflow cooling runners, the lengths of flow lines between every two adjacent temperature sensors are the same, the double-hearth lime kiln suspension cylinder temperature monitoring system also comprises a calculator device, the calculator device comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, and the double-hearth lime kiln suspension cylinder temperature monitoring method is realized when the processor executes the computer program.
Further, the airflow cooling flow channel adopts a spiral cooling channel, the spiral cooling channel comprises a spiral screwing-in channel and a spiral screwing-out channel, the top of the spiral screwing-in channel is provided with an air inlet, the top of the spiral screwing-out channel is provided with an air outlet, and the spiral screwing-in channel and the spiral screwing-out channel are communicated with each other from the bottom of the suspension cylinder.
Furthermore, the airflow cooling channel adopts an annular cooling channel, the annular cooling channel comprises an annular input channel and an annular output channel, the top of the annular input channel is provided with an air inlet, the top of the annular output channel is provided with an air outlet, and the annular input channel and the annular output channel are communicated with each other from the bottom of the suspension cylinder.
The invention also provides a storage medium, wherein the storage medium stores a computer program, and the computer program realizes the steps of the method for monitoring the temperature of the suspension cylinder of the double-chamber lime kiln when being executed by the processor.
The invention has the following beneficial effects:
according to the method for monitoring the temperature of the double-chamber lime kiln suspension cylinder, the wind temperature ti of each temperature measurement point i is obtained, and the wall surface average temperature T 'is estimated according to the wind temperature ti of each temperature measurement point i'wObtaining the logarithmic temperature rise a of the temperature measuring interval j by a formulaj(ii) a Finally according to logarithmic temperature rise ajAnd finding the logarithmic temperature rise a with the deviation larger than the preset threshold value on the logarithmic temperature rise curve in a relative relation with the logarithmic temperature rise curvejDetermining a local overtemperature area; the invention adopts a heat transfer rule based on air flow (cooling air flow) and wall surfaces, deduces and designs the temperature measured by using monitoring points, calculates the overall temperature of the suspension cylinder, utilizes a mean value checking method and logarithmic temperature rise change to enable the abnormal temperature rise to generate dominant change, determines a local overtemperature area, can accurately measure the average temperature of the suspension cylinder, captures the local overtemperature of the suspension cylinder, is more sensitive to capture and monitor the local overtemperature of the suspension cylinder, and can provide timely early warning for a production site, thereby effectively prolonging the service life of the suspension cylinder.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
4 description of the drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a method for monitoring the temperature of a suspension cylinder of a double-chamber lime kiln according to an embodiment of the invention;
FIG. 2 is a schematic flow chart of step S3 in one embodiment of the present invention;
FIG. 3 is a flow chart of a method for monitoring the temperature of a suspension cylinder of a double-chamber lime kiln according to another embodiment of the invention;
FIG. 4 is a flowchart of step S42 in one embodiment of the invention;
FIG. 5 is one of the schematic structural views of the suspension cylinder for the double-chamber lime kiln of the present invention;
FIG. 6 is a second schematic view showing the construction of a suspension cylinder for a double-chamber lime kiln according to the present invention;
FIG. 7 is one of the schematic diagrams of a specific monitoring embodiment of the present invention;
FIG. 8 is a second schematic diagram of an embodiment of the present invention
Fig. 9 is a third schematic diagram of a specific monitoring example of the present invention.
Illustration of the drawings:
100. a suspension cylinder; 10. an outer housing; 20. an inner housing; 30. an annular gas flow passage; 31. an air intake passage; 32. an exhaust passage; 40. a middle partition plate; 50. spirally screwing in the spiral sheet; 60. spirally screwing out the spiral sheet; 70. a temperature sensor; 80. an air intake duct; 90. an exhaust duct.
Detailed description of the preferred embodiments
It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in figures 1, 2, 3 and 4, in the method for monitoring the temperature of the suspension cylinder of the double-hearth lime kiln, a plurality of temperature measuring points are arranged in an airflow cooling flow channel of the suspension cylinder, the lengths of flow lines between two adjacent temperature measuring points are the same, i is defined as the serial number of the temperature measuring points, and i belongs to [0, N ]]The temperature measuring points are numbered in sequence along the airflow direction in the airflow cooling flow channel, 0 represents the number of the first temperature measuring point, and N represents the number of the last temperature measuring point; defining N +1 temperature measuring points, dividing the airflow cooling flow channel into N temperature measuring intervals j, j being i +1, j being E [1, N ∈]J is a temperature measurement interval number, and j is a temperature measurement interval number between a temperature measurement point i and a temperature measurement point i +1, and the method comprises the following steps: s1, acquiring the wind temperature ti of each temperature measuring point i in the airflow cooling flow channel of the suspension cylinder; s2, according to the wind temperature t of each temperature measuring pointiCalculating to obtain an estimated average wall surface temperature T 'of the suspension cylinder'w(ii) a S3, using the formula
aj＝ln(T′w-ti+1)-ln(T′w-ti) (2)
Namely ai+1＝ln(T′w-ti+1)-ln(T′w-ti)
Calculating logarithmic temperature rise a of temperature measuring interval jj(ii) a According to logarithmic temperature rise ajCorresponding logarithmic temperature rise curve, determining the logarithmic temperature rise a deviating from the preset threshold value on the logarithmic temperature rise curvejAnd acquiring a temperature measuring interval corresponding to the abnormal temperature rise as an overtemperature area for the abnormal temperature rise. Specifically, the temperature measurement section j indicates a region from the temperature measurement point i to the temperature measurement point i +1, for example, the temperature measurement section numbered 5 indicates a region from the temperature measurement point numbered 4 to the temperature measurement point numbered 5.
The method for monitoring the temperature of the double-chamber lime kiln suspension cylinder provided by the invention obtains the wind temperature t of each temperature measuring point iiThrough the wind temperature t of each temperature measuring point iiEstimated wall surface average temperature T'wObtaining the logarithmic temperature rise a of the temperature measuring interval j by a formulaj(ii) a Finally according to logarithmic temperature rise ajAnd finding the logarithmic temperature rise a with the deviation larger than the preset threshold value on the logarithmic temperature rise curve in a relative relation with the logarithmic temperature rise curvejDetermining a local overtemperature area; the invention adopts a heat transfer rule based on air flow (cooling air flow) and wall surfaces, deduces and designs the temperature measured by using monitoring points, calculates the overall temperature of the suspension cylinder, utilizes a mean value checking method and logarithmic temperature rise change to enable the abnormal temperature rise to generate dominant change, determines a local overtemperature area, can accurately measure the average temperature of the suspension cylinder, captures the local overtemperature of the suspension cylinder, is more sensitive to capture and monitor the local overtemperature of the suspension cylinder, and can provide timely early warning for a production site, thereby effectively prolonging the service life of the suspension cylinder.
In the invention, N +1 temperature sensors are arranged, the temperature sensors are arranged along the airflow direction in the airflow cooling flow channel, and the temperature measuring points are numbered in sequence by using a natural number i, wherein i belongs to [0, N ∈ [ ]]，tiAnd represents a temperature value obtained by the temperature sensor numbered i. Obviously, t0Temperature measured by a temperature sensor numbered 0, i.e. the inlet of the airflow cooling channelThe wind temperature at the temperature measuring point is measured by the temperature sensor with the number of N, namely the wind temperature at the temperature measuring point at the exhaust outlet of the airflow cooling flow channel. Further, in step S2, a formula is adopted
Calculating to obtain an estimated average wall surface temperature T 'of the suspension cylinder'wWherein, T'wRepresenting the estimated mean wall temperature, t0Denotes the wind temperature at the temperature measuring point at the inlet of the airflow cooling channel, tN denotes the wind temperature at the temperature measuring point at the outlet of the airflow cooling channel, h is the heat transfer coefficient between the cooling airflow and the wall surface, A is the total heat transfer area, m is the wind flow rate of the cooling airflow, cpIs the specific heat of wind.
It is understood that i denotes the number of the temperature measuring point (temperature detector), ti denotes the wind temperature corresponding to the temperature measuring point, j (j ═ i +1) denotes the number of the temperature measuring section between the temperature measuring point i and the temperature measuring point i +1, and a denotes the number of the temperature measuring section between the temperature measuring point i and the temperature measuring point i +1j(i.e. a)i+1) And the logarithmic temperature rise of the temperature measuring interval with the number j is shown, namely the logarithmic temperature rise from the temperature measuring point with the number i to the temperature measuring point with the number i + 1. In specific implementation, if the logarithmic temperature rise a5More theoretical logarithmic temperature rise curve (fitting curve y)1＝c1·x1+b1) If the temperature is obviously higher, the temperature measuring interval marked 5 is an overtemperature area.
Understandably, the temperature can be raised a by the logarithmic temperature risejIs linearly fitted to obtain a first fitted linear line (i.e. logarithmic temperature rise curve), y1＝c1·x1+b1。
Referring to fig. 2, further, step S3 specifically includes: s31, using formula aj＝ln(T′w-ti+1)- ln(T′w-ti) Calculating the logarithmic temperature rise a of the temperature measuring interval jj(ii) a S32, raising the temperature a for each logarithmjThe rows and columns of the first linear fitting line are linearly fitted to obtain a first linear fitting line,
y1＝c1·x1+b1 (3)
s33, obtaining each logarithmic temperature rise ajCorresponding fitting projection distance d on the first fitting linear linei；
S34, projecting the distance d according to the fittingiObtaining an average projection value d'; s35, adopting a preset formula
From each logarithmic rise of temperature ajThe logarithmic temperature rise a corresponding to the preset formula is obtainedjFor abnormal temperature rise, the temperature measurement interval corresponding to the abnormal temperature rise is an overtemperature interval, wherein the first threshold value k1Has a value in the range of 1.5 to 3; and S36, determining the area corresponding to the abnormal temperature rise as an over-temperature area. Understandably, k1Is set to a troubleshooting threshold, k, greater than 11The larger the value is, the smaller the sensitivity is, but the smaller the misjudgment probability is; k is a radical of1The smaller the value, the greater the sensitivity, but the greater the probability of misjudgment, and the invention obtains k according to the actual trial on site1The range of (A) is 1.5 to 3. In practice, if diValue satisfies
Then it indicates that there is a local overtemperature between the temperature measurement point numbered i and the temperature measurement point numbered i + 1.
Understandably, y1Is the logarithmic temperature rise, x, of the temperature measurement interval1Is the length of the flow line from the start point of the temperature measurement interval to the end point of the temperature measurement interval, c1Is the slope of a straight line, b1Is the straight line intercept.
Understandably, the invention can also increase the temperature a by two adjacent logarithmic temperaturesjThe slope of the connecting line determines the abnormal temperature rise, if two adjacent logarithmic temperature rises ajIf the absolute value of the slope of (a) is greater than the preset slope value, the corresponding rear logarithmic temperature rise a is determinedjIs an abnormal temperature rise.
Referring to fig. 3, further, S41 includes the following steps:s41, raising the temperature a from each logarithmjRemoving all abnormal temperature rises, performing linear fitting again to obtain a second fitting linear line,
y2＝c2·x2+b2 (6)
s5, using the formula
Calculating to obtain the local temperature T corresponding to each abnormal temperature risewc(i + 1). By adopting the above mode, the overtemperature temperature corresponding to the local abnormal temperature rise can be accurately calculated, and the maintenance and the improvement of the service life of the suspension cylinder are facilitated.
Further, after step S41, the method further includes: s42, judging the estimated average wall surface temperature T'wAnd the actual average wall temperature TwWhether the error of (2) is within a preset error value range; if the average wall surface temperature T 'is estimated'wAnd the actual average wall temperature TwIs within the preset error value range, the process proceeds to step S5.
Further, if the average wall surface temperature T 'is estimated'wAnd the actual average wall temperature TwIs not within the preset error value range, and the estimated average wall surface temperature T 'is corrected and updated'wThen, the process proceeds to step S3.
Referring to fig. 4, further, step S42 specifically includes: s421, obtaining the slope of the second fitting linear line and the relative control error level parameter k2The correlation of (2); s422, if | c2|≤k2Determining an estimated average wall temperature T'wAnd the actual average wall temperature TwThe error therebetween is within the preset error value range, and step S5 is performed; s423, if
|c2|＞k2 (7)
Determining the estimated average wall temperature T'wAnd the actual average wall temperature TwThe error between the two is not in the range of the preset error value, and a formula is adopted
ComputingObtaining a temperature correction value delta T, wherein M is a serial number of a temperature measurement interval arranged at the last position after the overtemperature area is removed, aMIs the logarithmic temperature rise of the temperature measurement interval M, F is the serial number of the first temperature measurement interval after the overtemperature area is eliminated, aFLogarithmic temperature rise, t, of temperature range FMIs the wind temperature, t, of the temperature measuring point numbered MM-1Is the wind temperature, t, of the temperature measuring point numbered M-1FIs the wind temperature, t, of the temperature measuring point numbered FF-1The number is F-1; using the formula Tw＝ΔT+T′wCalculating to obtain corrected wall temperature TwCorrecting the wall surface temperature T'wSubstitute for estimated mean wall temperature T'wAnd proceeds to step S3; using the formula Tw＝ΔT+T′wCalculating to obtain corrected wall temperature TwWill correct the wall temperature TwSubstitute for estimated mean wall temperature T'wAnd proceeds to step S3. Understandably, if the original number of the temperature measurement interval is the temperature measurement interval 1, the temperature measurement interval 2, the temperature measurement interval 3, the temperature measurement interval 4 and the temperature measurement interval 5; if the overtemperature interval 1 and the overtemperature interval 3 are eliminated, F is equal to 2.
Understandably, the wall surface temperature T'wThe specific operation process is as follows: after local abnormal temperature rise is eliminated, the a is corrected againjIs subjected to linear fitting to obtain a second fitting linear line, y2＝c2·x2+b2(ii) a Judgment c2Value size determination T'wWhether the error is within an acceptable range: if: l c2|＞k2If the error is too large, the estimated average wall surface temperature T 'is corrected according to the following formula'w：
T″w＝ΔT+T′w (9)
By TwSubstitute for T'wProceeding to step S3; if it is not
|c2|≤k2 (10)
Indicating that the error is within the acceptable range, it jumps to step S5. Wherein k is2The error level is controlled to be a setting parameter, the smaller the value is, the smaller the error is, but the iteration and calculation time can be increased; and vice versa. M is the total number of abnormal temperature rises after elimination. Step S5 calculating local over-temperature value Twc(i+1)，
Where i +1 is a subscript corresponding to the over-temperature region.
Further, the formula h.C.dx (T) is adoptedw-tx)＝m·cp·dtxDerived to
Where C is the contact boundary length of the cooling airflow, dx is the integration step length (the streamline length of a single temperature measurement interval), and cxdx is a contact area.
Further, using the formula
The average projection value d' is calculated.
It will be appreciated that in another embodiment, first, the wind temperature ti at each temperature measurement point is obtained, including the wind temperature t0、t1、t2、t3、t4、…、t7、t8、t9、…、tNIncluding a temperature measuring interval j1To jNAnd secondly, the mean wall temperature T 'is estimated'w(ii) a Then, the logarithmic temperature rise a is obtainedjComprising a1、a2、a3、a4、…a7、 a8、a9、…aN(ii) a According to logarithmic temperature rise and logarithmTemperature rise curve, finding out abnormal temperature rise a4、a8(ii) a Correcting the estimated average wall temperature, and proceeding to step S3; reacquiring the proportional temperature rise ajWherein a is4、a8No further calculations are made.
Referring to fig. 5 and 6, the invention further provides a double-hearth lime kiln suspension cylinder temperature monitoring system, which comprises temperature sensors and suspension cylinders with airflow cooling channels, wherein the temperature sensors are arranged in one-to-one correspondence with the temperature measuring points and are used for monitoring the temperatures of the corresponding temperature measuring points, the temperature sensors are arranged at intervals along the extension direction of the airflow cooling channels, the lengths of flow lines between two adjacent temperature sensors are the same, the double-hearth lime kiln suspension cylinder temperature monitoring system further comprises a calculator device, the calculator device comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, and the double-hearth lime kiln suspension cylinder temperature monitoring method is realized when the processor executes the computer program.
Further, the airflow cooling flow channel adopts a spiral cooling channel, the spiral cooling channel comprises a spiral screwing-in channel and a spiral screwing-out channel, the top of the spiral screwing-in channel is provided with an air inlet, the top of the spiral screwing-out channel is provided with an air outlet, and the spiral screwing-in channel and the spiral screwing-out channel are communicated with each other from the bottom of the suspension cylinder.
Furthermore, the airflow cooling channel adopts an annular cooling channel, the annular cooling channel comprises an annular input channel and an annular output channel, the top of the annular input channel is provided with an air inlet, the top of the annular output channel is provided with an air outlet, and the annular input channel and the annular output channel are communicated with each other from the bottom of the suspension cylinder.
Referring to fig. 4 and 5 again, optionally, the specific structure of the double-chamber lime kiln suspension cylinder temperature monitoring system is as follows: comprising a suspension cylinder 100 with an annular air flow channel, the suspension cylinder 100 comprising an outer shell 10 and an inner shell 20, the outer shell 10 being arranged around the inner shell 20 so as to form an annular air flow channel 30, and an intermediate partition 40, the spiral-in spiral piece 50 and the spiral-out spiral piece 60, the middle partition plate 40 is arranged between the outer shell 10 and the inner shell 20 and used for separating the annular airflow channel 30 to form an air inlet channel 31 and an air outlet channel 32, the spiral-in spiral piece 50 is arranged in the air inlet channel 31 and used for enabling the air inlet channel 31 to form a spiral-in channel, the spiral-out spiral piece 60 is arranged in the air outlet channel 32 and used for enabling the air outlet channel 32 to form a spiral-out channel, an air inlet end of the spiral-in channel is provided with an air inlet, an air outlet end of the spiral-out channel is provided with an air outlet, and an air outlet end of the spiral-in channel and an air inlet end of the spiral-out channel are communicated and combined to form a spiral cooling channel.
It is understood that, in the present invention, the outer shell 10 and the inner shell 20 are made of steel, and the intermediate partition 40, the spiral-in spiral piece 50 and the spiral-out spiral piece 60 are made of steel; the screw-in flight 50 is circumferentially disposed about the suspension cylinder 100 and extends axially toward the bottom of the suspension cylinder 100 to direct the cooling air flow, and the screw-out flight 60 is circumferentially disposed about the suspension cylinder 100 and extends axially toward the top of the suspension cylinder 100 to direct the cooling air flow.
Alternatively, a screw-in spiral piece 50 is screwed around the inner casing 20 between the intermediate partition 40 and the inner casing 20 so that the air intake passage 31 forms a screw-in passage, and a screw-out spiral piece 60 is screwed out around the intermediate partition 40 between the intermediate partition 40 and the outer casing 10 so that the air discharge passage 32 forms a screw-out passage. It is understood that since the inner side temperature of the suspension cylinder 100 is higher than the outer side temperature, in order to facilitate the reduction of the temperature of the inner case 20, the screw-in passage is disposed close to the inner case 20.
Alternatively, a spiral-in spiral piece 50 is spirally wound around the inner casing 20 between the middle partition 40 and the inner casing 20 so that the air inlet passage 31 forms a spiral-in passage, and a spiral-out spiral piece 60 is spirally wound around the middle partition 40 between the middle partition 40 and the outer casing 10 so that the air outlet passage 32 forms a spiral-out passage.
Alternatively, the air inlet is arranged at the top of the suspension cylinder 100, the air outlet is arranged at the top of the suspension cylinder 100, the bottom of the spiral screwing-in spiral piece 50 is provided with a first vent hole, the bottom of the spiral screwing-out spiral piece 60 is provided with a second vent hole, and the spiral screwing-in channel and the spiral screwing-out channel are communicated from the bottom of the suspension cylinder 100 by arranging the first vent hole and the second vent hole, so that the spiral screwing-in channel and the spiral screwing-out channel are combined to form a spiral cooling channel.
Optionally, an intake conduit 80 is provided outside the suspension cylinder 100 and in communication with the intake inlet, and an exhaust conduit 90 is provided outside the suspension cylinder 100 and in communication with the exhaust outlet. Thereby facilitating the introduction of the cooling air flow from above the suspension cylinder 100 into the screw-in channel through the air intake duct 80, and the extraction of the cooled cooling air flow from above the suspension cylinder 100.
Optionally, in order to facilitate detecting the temperature of the spiral cooling channel and avoid local over-temperature, a temperature sensor 70 is disposed in each spiral cooling channel. Alternatively, the temperature sensor 70 employs a thermocouple.
Alternatively, the temperature sensors 70 are spaced at equal streamline lengths along the direction of airflow.
When cooling is carried out, cooling airflow is sent from the air inlet end of the spiral screwing channel, flows through the spiral screwing channel, and cools the shell on one side of the spiral screwing channel; then the cooling airflow continuously flows from the exhaust end of the spiral screwing-in channel to the air inlet end of the spiral screwing-out channel, flows through the spiral screwing-out channel to cool the shell on one side of the spiral screwing-out channel, and finally flows out from the exhaust outlet of the spiral screwing-out channel; according to the annular cooling suspension cylinder for the double-chamber lime kiln, the cooling air flow channel is arranged to be in a spiral shape attached to the wall body, the change of the streamline direction of cooling airflow is slower and smoother, and a vertical or sharp flow channel break angle in the prior art is avoided, so that the flow of the cooling airflow is smoother, the pressure drop of the cooling airflow entering and exiting the annular airflow channel is obviously reduced compared with the prior art, meanwhile, the spiral airflow channel is designed to avoid a small included angle in the flow channel, the whole flow channel almost has no flow field dead zone, the local overtemperature caused by the flow field dead zone can be effectively avoided, the flow resistance of the cooling airflow in the cooling process is smaller, and the cooling effect is good.
According to the temperature monitoring method, a plurality of thermocouple thermometers are arranged at the local position of a cylinder body of the suspension cylinder, and monitoring and early warning are carried out by directly capturing the temperature abnormality of a measuring point, so that the method can only capture the position of the measuring point and the temperature overrun nearby the measuring point or the integral temperature overrun, the sensitivity to the temperature change at a position at a certain distance away from the measuring point is insufficient, and when the local overtemperature occurs in a region except the vicinity of the measuring point, the temperature at the measuring point is usually not changed obviously, so that the local overtemperature of an accidental region of the measuring point cannot be accurately monitored and early warned in time; according to the invention, a suspension cylinder temperature monitoring method based on mean value checking is adopted, and linear change is carried out on logarithmic temperature rise in temperature measurement through calculation, so that local overtemperature is effectively captured, the sensitivity of a temperature measurement system to the local overtemperature is improved, timely early warning is provided for a production field, and the operation life of a suspension cylinder is effectively prolonged.
The invention also provides a storage medium, wherein the storage medium stores a computer program, and the computer program realizes the steps of the method for monitoring the temperature of the suspension cylinder of the double-chamber lime kiln when being executed by the processor.
The theoretical basis of the temperature monitoring method of the invention is as follows:
first, the functional relationship between wall temperature and wind temperature was found: when the lime kiln operates, the temperature of materials is generally maintained at 1100 ℃, the temperature of the materials is generally conducted to the steel shell of the suspension cylinder through the fire-resistant layer and the heat-insulating layer and is generally below 500 ℃, and the temperature field of the materials at the annular channel is relatively uniform, so that the temperature of all parts of the shell of the suspension cylinder is basically uniform and is T 'when no local damage exists'wAnd (4) showing. The heat exchange process of the fluid flowing through the constant temperature wall surface can be described by the following formula:
h·C·dx·(Tw-tx)＝m·cp·dtx，
namely:
after integrating the two sides of the above equation, there are:
in the formula, h is the heat transfer coefficient between gas and a wall surface, and is basically equal at each position of the suspension cylinder shell; c is the contact boundary length of the gas and the shell, Δ x is the integration step length (the streamline length of a single temperature measurement interval), and C × Δ x is the contact area a; m is the wind flow; cp is the wind specific heat. The average wall temperature formula of the suspension cylinder can be derived through the following formula:
where t0 and tN are the inlet air temperature and the outlet air temperature, respectively, and a is the total heat transfer area, i.e., the suspension cylinder housing area.
Then, the influence relation of local overtemperature on the wind temperature is researched to define the logarithmic temperature rise a of the monitoring pointj(i.e. a)i+1)，
ai+1＝ln(T′w-ti+1)-ln(T′w-ti)
When the inter-measurement-point distances Δ x are equal, it is clear that:
i.e. the logarithmic temperature rise a at each non-abnormal temperature risej(i.e. a)i+1) Is constant, and at an abnormal temperature rise, the logarithmic temperature rise ajThere will be a significant difference. Therefore, can pass through the pair ajPerforming linear fitting to obtain a first fitted linear line, y1＝c1·x1+b1And obviously deviating from the point of the first fitted linear line, namely, the abnormal temperature rise.
Whether a certain point is a point with obvious deviation can be judged according to the following mean value checking method: calculating the logarithmic temperature rise ajProjected distance d from first fitted linear lineiThen calculate diThe average value d 'of (d') is more approximate to the first fitting of the normal point and the temperature measuring point because the number of abnormal temperature rises is generally much less than that of the temperature measuring pointsProjection distance of linear line, and abnormal temperature rise diThe value is much larger than the average value d', so the abnormal temperature rise can be checked by the following formula:
secondly, the average wall temperature T 'is estimated'wThe correction method comprises the following steps: due to the existence of local overtemperature or estimation error of the wall heat exchange coefficient h, the estimated average wall temperature T 'is calculated by adopting the formula (1)'wThe estimated error Δ T is generated. Actual average wall temperature TwAnd the estimated average wall temperature T 'in the formula (1)'wError between Δ T ═ T'w-Tw. Adopting the estimated average wall surface temperature T'wCalculating the logarithmic temperature rise aj(i.e. a)i+1)：
ai+1＝ln(Tw+ΔT-ti+1)-ln(Tw+ΔT-ti)
Using the actual mean wall temperature TwCalculated logarithmic temperature rise a'j，
Logarithmic temperature rise error Δ a due to error in predicted average wall temperaturej：
In the practical process, the delta T is not more than +/-50 ℃ generally, and the wall surface temperature is higher than the wind temperature by more than 300 ℃ generally so as to ensure better heat exchange effect,
generally not exceeding. + -. 0.2, i.e.
Within this range, it can be approximated that:
further:
because:
namely: if the estimated wall temperature is equal to the actual wall temperature, the slope c of the second fitted linear line 20; conversely, the larger the deviation between the estimated wall temperature and the actual wall temperature is, the slope c2The larger the deviation from 0. Thus, a straight line y may be used2＝c2·x2+b2C of2The estimated accuracy of the wall temperature is measured.
Therefore, there are:
ΔaM-ΔaF＝aM-aF
further:
therefore, there are:
due to the actual average wall temperature TwUnknown and T'w＝Tw+ Δ T, Δ T vs TwAnd T'wIf the phase difference is very small, the estimated wall temperature is used for replacing the real average wall temperature, and the following wall temperature error calculation formula can be obtained:
m is the number corresponding to the last logarithmic temperature rise in the temperature rise array after the abnormal temperature rise is eliminated, aMIn order to eliminate the logarithmic temperature rise corresponding to the last logarithmic temperature rise point in the logarithmic temperature rise array after abnormal temperature rise, tMIs aMThe corresponding terminal air temperature of the temperature measuring interval, F is a number corresponding to one logarithmic temperature rise in the temperature rise sequence after the overtemperature temperature rise is eliminated, aFFor eliminating logarithmic temperature rise, t, corresponding to the first temperature measurement interval after abnormal temperature riseFIs aFAnd the wind temperature at the tail end of the corresponding temperature measuring interval.
Temperature correction equation:
T″w＝T′w+ΔT (9)
thirdly, study of the local overtemperature value Twc(i +1) calculation method:
is represented by the formula
And (3) obtaining:
wherein const ═ b2。
The heat transfer process for constant wall temperature is as follows:
applying the above formula to two measurement points near the local overtemperature, there are:
namely:
if the monitoring points are set densely enough, the monitoring points have
|Twc-ti|＞＞|ti-ti+1|
Thus, there are:
therefore, there are:
please refer to fig. 7, fig. 8 and fig. 9, which illustrate a specific monitoring example: in the example, the actual average temperature of the wall surface is 600 ℃, the inlet temperature of the cold fluid is 25 ℃, the outlet temperature of the cold fluid is 250 ℃, and 21 temperature measurement points are arranged, wherein local high temperature exists between the temperature measurement points numbered 4-5, 8-9, 12-13 and 16-17, and the value is 650 ℃. The average temperature difference estimated by the formula (1) was 50 ℃. Then, the actual temperature values of the points are measured, and the logarithmic temperature rise values calculated by using the estimated average temperature are respectively as follows. FIG. 7 shows the curves corresponding to the actual temperature values at the respective points obtained by measurement and the logarithmic temperature rise value calculated using the estimated average temperature (650 ℃ C.). It can be seen from the graph that the local abnormal temperature rise does not clearly show an abnormality on the measured temperature curve, but on the logarithmic temperature rise curve, it can be seen that the deviation of the value of the curve from other normal values is very large at the abnormal temperature rise. The logarithmic temperature rise value of the abnormal temperature rise is obviously far away from the linear fitting curve, so that the logarithmic temperature rise value can be found by adopting a mean value checking method easily.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for monitoring the temperature of a suspension cylinder of a double-hearth lime kiln is characterized in that,
a plurality of temperature measuring points are arranged in an airflow cooling flow channel of the suspension cylinder, the lengths of flow lines between two adjacent temperature measuring points are the same, i is defined as a temperature measuring point number, i belongs to [0, N ], the temperature measuring points are numbered in sequence along the airflow direction in the airflow cooling flow channel, 0 represents the number of the first temperature measuring point, and N represents the number of the last temperature measuring point; defining N +1 temperature measuring points to divide the airflow cooling flow channel into N temperature measuring intervals j, j being i +1, j being e [1, N ], wherein j is a temperature measuring interval number, and the temperature measuring interval number between the temperature measuring point i and the temperature measuring point i +1 is j, and the method comprises the following steps:
s1, acquiring the wind temperature t of each temperature measuring point i in the airflow cooling flow channel of the suspension cylinderi；
S2, according to the wind temperature t of each temperature measuring pointiCalculating to obtain an estimated average wall surface temperature T 'of the suspension cylinder'w；
S3, using formula aj＝ln(T′w-ti+1)-ln(T′w-ti) Calculating the logarithmic temperature rise a of the temperature measuring interval jj(ii) a According to the logarithmic temperature rise ajCorresponding logarithmic temperature rise curve, determining the logarithmic temperature rise a deviating from the logarithmic temperature rise curve by more than the preset threshold valuejAnd acquiring a temperature measuring interval corresponding to the abnormal temperature rise as an overtemperature area for the abnormal temperature rise.
2. The double-bore lime kiln suspension cylinder temperature monitoring method according to claim 1,
the steps areIn step S2, a formula is adopted
Calculating to obtain the estimated average wall surface temperature T 'of the suspension cylinder'wWherein, T'wRepresenting the estimated mean wall temperature, t0Representing the wind temperature, t, at the temperature measurement point at the inlet of the airflow cooling channelNRepresenting the wind temperature at the temperature measuring point at the exhaust outlet of the airflow cooling channel, h is the heat transfer coefficient between the cooling airflow and the wall surface, A is the total heat transfer area, m is the wind flow rate of the cooling airflow, cpIs the specific heat of wind.
3. The double-bore lime kiln suspension cylinder temperature monitoring method according to claim 1,
the step S3 specifically includes:
s31, using formula aj＝ln(T′w-ti+1)-ln(T′w-ti) Calculating the logarithmic temperature rise a of the temperature measuring interval jj；
S32, raising the logarithmic temperature by ajIs subjected to linear fitting to obtain a first fitted linear line, y1＝c1·x1+b1；
S33, obtaining each logarithmic temperature rise ajCorresponding fitting projection distance d on the first fitting linear linej；
S34, projecting the distance d according to the fittingjObtaining an average projection value d';
s35, adopting a preset formula
From each of said logarithmic temperature rises ajThe logarithmic temperature rise a corresponding to the preset formula is obtainedjFor abnormal temperature rise, wherein the first threshold value k1Has a value in the range of 1.5 to 3;
and S36, determining that the area corresponding to the abnormal temperature rise is an overtemperature area.
4. The method for monitoring the temperature of the suspension cylinder of the double-bore lime kiln as claimed in claim 3, further comprising the steps of:
s41, raising the temperature a from each logarithmic temperaturejRemoving all abnormal temperature rises, and performing linear fitting again to obtain a second fitted linear line y2＝c2·x2+b2；
S5, using the formula
Calculating to obtain the local temperature T corresponding to each abnormal temperature risewc(i+1)。
5. The method for monitoring the temperature of the suspension cylinder of the dual-bore lime kiln as claimed in claim 4, further comprising after the step S41:
s42, judging the estimated average wall surface temperature T'wAnd the actual average wall temperature TwWhether the error of (2) is within a preset error value range; if the average wall surface temperature T 'is estimated'wAnd the actual average wall temperature TwIs within the preset error value range, the process proceeds to step S5.
6. The method for monitoring the temperature of the suspension cylinder of the double-bore lime kiln as claimed in claim 5, wherein the step S42 specifically comprises:
s421, obtaining the slope of the second fitting linear line and the relative control error level parameter k2The correlation of (2);
s422, if | c2|≤k2Determining an estimated average wall temperature T'wAnd the actual average wall temperature TwThe error therebetween is within the preset error value range, and the process proceeds to step S5;
s423, if | c2|＞k2Determining an estimated average wall temperature T'wAnd the actual average wall temperature TwThe error between the two is not in the range of the preset error value, and a formula is adopted
Calculating to obtain a temperature correction value delta T, wherein M is a serial number of a last temperature measurement interval arranged after the overtemperature area is removed, aMIs the logarithmic temperature rise of the temperature measurement interval M, F is the serial number of the first temperature measurement interval after the overtemperature area is eliminated, aFLogarithmic temperature rise, t, of temperature range FMIs the wind temperature, t, of the temperature measuring point numbered MM-1Is the wind temperature, t, of the temperature measuring point numbered M-1FIs the wind temperature, t, of the temperature measuring point numbered FF-1The number is F-1; using the formula Tw＝ΔT+T′wCalculating to obtain corrected wall temperature TwWill correct the wall temperature TwSubstitute for estimated mean wall temperature T'wAnd proceeds to step S3.
7. A temperature monitoring system for a suspension cylinder of a double-chamber lime kiln is characterized in that,
the device comprises temperature sensors and a suspension cylinder with an airflow cooling flow channel, wherein the temperature sensors are arranged in one-to-one correspondence with temperature measuring points and are used for monitoring the temperatures of the corresponding temperature measuring points, the temperature sensors are arranged at intervals along the extension direction of the airflow cooling flow channel, the lengths of flow lines between every two adjacent temperature sensors are the same,
further comprising calculator means comprising a memory, a processor, and a computer program stored in said memory and executable on said processor, said processor when executing said computer program implementing the method of monitoring the temperature of a suspension cylinder of a dual-bore lime kiln according to any one of claims 1 to 6.
8. The dual-bore lime kiln suspension cylinder temperature monitoring system of claim 7,
the airflow cooling flow channel adopts a spiral cooling channel, the spiral cooling channel comprises a spiral screwing-in channel and a spiral screwing-out channel, the top of the spiral screwing-in channel is provided with an air inlet, the top of the spiral screwing-out channel is provided with an air outlet, and the spiral screwing-in channel and the spiral screwing-out channel are communicated with each other at the bottom of the suspension cylinder.
9. The dual-bore lime kiln suspension cylinder temperature monitoring system of claim 7,
the airflow cooling flow channel adopts an annular cooling channel, the annular cooling channel comprises an annular input channel and an annular output channel, an air inlet is formed in the top of the annular input channel, an air outlet is formed in the top of the annular output channel, and the annular input channel and the annular output channel are communicated with each other from the bottom of the suspension cylinder.
10. A storage medium storing a computer program, characterized in that,
the computer program when being executed by a processor realizes the steps of the method for monitoring the temperature of a suspension cylinder of a dual-bore lime kiln according to any one of claims 1 to 6.
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