CN115651998B - Steel slag flue gas treatment system, system control method, electronic equipment and storage medium - Google Patents
Steel slag flue gas treatment system, system control method, electronic equipment and storage medium Download PDFInfo
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- CN115651998B CN115651998B CN202211680009.2A CN202211680009A CN115651998B CN 115651998 B CN115651998 B CN 115651998B CN 202211680009 A CN202211680009 A CN 202211680009A CN 115651998 B CN115651998 B CN 115651998B
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Abstract
The invention relates to the technical field of solid waste treatment, in particular to a steel slag flue gas treatment system, a system control method, electronic equipment and a storage medium. The steel slag flue gas treatment system comprises: the device comprises a dust collecting system and a slag stewing cover, wherein the dust collecting system comprises a dust collecting pipeline and at least one slag stewing cover, the slag stewing cover is used for being buckled on a slag stewing pool to seal the slag stewing pool, and an air outlet pipeline is arranged on the slag stewing cover and communicated with the dust collecting pipeline; the dust removal system comprises a dust removal device, a fan and a discharge device which are sequentially connected, wherein an air inlet end of the fan is connected with the dust removal device, one end of an air outlet of the fan is connected with the discharge device, and the dust removal device is connected with the air outlet pipeline; the fan can adjust the operating frequency according to the working number of the slag stewing pool. The invention also provides a control method of the steel slag flue gas treatment system, and electronic equipment and a storage medium for operating the control method.
Description
Technical Field
The invention relates to the technical field of solid waste treatment, in particular to a steel slag flue gas treatment system, a system control method, electronic equipment and a storage medium.
Background
The steel slag is a byproduct generated in the smelting process of the converter, and can be recycled after the smelting is finished at present. The existing steel slag treatment mode is a hot stewing mode: set up a plurality of slag stewing ponds (the slag pond can work alone, also can a plurality of slag stewing ponds simultaneously smolder the sediment work) on the ground or at the bottom of the ground, pour into slag stewing pond with the slag after, utilize the hook machine to carry out crushing operation to the great slag of volume, the purpose makes the broken slag that becomes the little volume of slag of big volume to make its and water contact surface bigger, after the breakage is accomplished, cover the pond lid in slag stewing pond, beat water in the slag stewing pond again, firstly can play the cooling effect, can thermal braise and clear up the differentiation slag in addition. The temperature of the steel slag generally exceeds 1000 ℃, and a large amount of water vapor containing dust such as steel slag scraps is generated after the steel slag meets water.
Purification of flue gas: the slag stewing cover is provided with an air outlet pipeline. Generally, a manufacturer can work a plurality of slag stewing ponds at the same time, so a plurality of air outlet pipelines are communicated with a dust collecting pipeline (similar to a main pipeline), and then the other end of the dust collecting pipeline is connected with a chimney for emission. Therefore, the smoke generated in the slag stewing process can be collected and then uniformly discharged, and the smoke is prevented from overflowing in a factory building. The slag stewing process comprises a plurality of stages, and the water injection amount of each stage is different, so that the smoke generated in the slag stewing process is different, for example, the temperature of the steel slag is higher at the beginning, and the generated steam amount is larger. And the dust-containing gas will gradually decrease at the later stage of the cooling process, so that the amount of dust-containing gas changes during the whole cooling process, resulting in variable pressure inside the pipeline. In the prior art, the following method is generally adopted to control the pressure inside the air outlet pipeline:
and a pressure transmitter is arranged on the air outlet pipeline, and the pressure at the outlet of the slag stewing pool is monitored and transmitted to a control terminal (PLC). The system can preset a pressure preset threshold range, and when the monitored pressure value is not in the pressure range of the preset threshold, the opening of the electric regulating valve is regulated, so that the pressure of the air outlet pipeline is regulated. For example, if the negative pressure is too large, the opening degree is increased; and the negative pressure is too small, and the opening degree is reduced.
But it has the following disadvantages: although can realize the regulation to pressure, above-mentioned regulation method's defect lies in when the pressure numerical value of monitoring is when beating at the upper and lower limit edge of predetermined threshold value scope repeatedly, and electric control valve can follow constantly adjustment, leads to electric control valve frequent work, seriously influences life, can exert an influence to the collection of flue gas.
Disclosure of Invention
The invention provides a steel slag flue gas treatment system, a system control method, electronic equipment and a storage medium. The control method of the steel slag flue gas treatment system improves the control mode of the electric regulating valve, prolongs the service life of the electric regulating valve, improves the running mode of the fan, realizes the automatic frequency conversion regulation of the fan, reduces the power consumption and prolongs the service life of the fan.
The invention provides a steel slag flue gas treatment system, which comprises:
the dust collecting system comprises a dust collecting pipeline and at least one slag stewing cover, the slag stewing cover is used for being buckled on the slag stewing pool to seal the slag stewing pool, an air outlet pipeline is arranged on the slag stewing cover, and all the air outlet pipelines are communicated with the dust collecting pipeline;
the dust removal system comprises a dust removal device, a fan and a discharge device which are sequentially connected, wherein an air inlet end of the fan is connected with the dust removal device, one end of an air outlet of the fan is connected with the discharge device, and the dust removal device is connected with the air outlet pipeline; the fan can adjust the operating frequency according to the work quantity of the slag stewing pool.
According to the steel slag flue gas treatment system provided by the invention, the gas outlet pipeline is provided with the pressure transmitter for monitoring the pressure in the pipeline, and the gas outlet pipeline is provided with the electric regulating valve for regulating the pressure in the pipeline.
The invention also provides a control method of the steel slag flue gas treatment system, which comprises a pressure control method of a dust collection system and a fan interlocking control method;
the dust collection system pressure control method includes:
within a preset pressure threshold range P m ~P M Respectively add a first section to be adjusted and a second section to be adjusted near two ends of the base, wherein the first section to be adjusted is P a ~P m The second section to be adjusted is P M ~P b ；
When the pressure value detected by the pressure transmitter is less than P a Or greater than P b When the pressure value is in the first section to be adjusted or the second section to be adjusted, adjusting the opening of the electric regulating valve until the pressure value is in the first section to be adjusted or the second section to be adjusted;
when the pressure value detected by the pressure transmitter is in the first section to be adjusted or the second section to be adjusted, the opening degree of the electric regulating valve is continuously adjusted until the pressure changesThe pressure value detected by the transmitter falls within the pressure threshold range P m ~P M ；
The fan interlocking control method comprises the following steps:
collecting a water fetching signal of the slag stewing pool;
determining the number of the slag stewing ponds in the working state according to the water beating signal;
and correspondingly controlling the running frequency of the fan according to the number of the slag stewing ponds in the working state.
According to the control method of the steel slag flue gas treatment system, in the pressure control method of the dust collecting system, when the pressure value detected by the pressure transmitter is less than P a Or greater than P b The step of adjusting the opening of the electric regulating valve comprises the following steps:
controlling the electric regulating valve to keep the initial opening and maintaining the set time;
judging the pressure value range of the pressure value monitored by the pressure transmitter, and if the pressure value is still less than P a Or greater than P b And when the pressure value is detected, the opening degree of the electric regulating valve is increased step by step and the set time is maintained until the pressure value monitored by the pressure transmitter is in the first section to be regulated or the second section to be regulated.
According to the control method of the steel slag flue gas treatment system provided by the invention, in the pressure control method of the dust collecting system, when the pressure value detected by the pressure transmitter is in the first section to be adjusted or the second section to be adjusted, the step of adjusting the opening of the electric regulating valve comprises the following steps:
controlling the electric regulating valve to keep the current opening and maintaining the set time;
if the pressure value detected by the pressure transmitter falls into the pressure threshold value range P m ~P M Controlling the electric regulating valve to keep the current opening degree;
when the pressure value detected by the pressure transmitter is in the first section to be adjusted, presetting a plurality of numerical value sections, wherein each numerical value section corresponds to a stepping increment value of the opening of the electric regulating valve, and determining the pressure value detected by the pressure transmitter and P m Difference value C between 1 And take out its absoluteTo value according to C 1 Selecting the stepping increment value which is correspondingly increased under the current opening degree of the electric control valve in the numerical value section in which the absolute value falls, and maintaining the set time;
when the pressure value detected by the pressure transmitter is in the second section to be adjusted, presetting a plurality of numerical value sections, wherein each numerical value section corresponds to a stepping increment value of the opening of the electric regulating valve, and determining the pressure value detected by the pressure transmitter and P M Difference value C between 2 According to C 2 And the falling numerical value section selects the stepping increment value which is correspondingly increased under the current opening degree of the electric control valve, and maintains the set time.
According to the control method of the steel slag flue gas treatment system provided by the invention, in the pressure control method of the dust collection system, the step of presetting the pressure threshold range comprises the following steps: presetting a smoke concentration range, equally dividing the preset smoke concentration range into a plurality of sections, wherein each smoke concentration section corresponds to a preset different pressure threshold range, arranging a smoke concentration sensing device on the air outlet pipeline to collect the smoke concentration, and determining the corresponding pressure threshold range according to the section where the collected smoke concentration is located.
According to the control method of the steel slag flue gas treatment system, in the fan interlocking control method, a speed reduction pressure value and a speed acceleration pressure value are preset, the speed reduction frequency and the speed acceleration frequency of the fan are correspondingly preset, when the pressure value of the pressure transmitter is detected to be lower than the speed reduction pressure value, the speed reduction frequency of the fan is controlled, and when the pressure value of the pressure transmitter is detected to be higher than the speed acceleration pressure value, the speed acceleration frequency of the fan is controlled.
The invention also provides electronic equipment which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the control method of the steel slag flue gas treatment system is realized.
The invention also provides a non-transitory computer readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing the method for controlling a steel slag flue gas treatment system as described in any one of the above.
According to the steel slag flue gas treatment system, the dust collection system and the dust removal system are arranged, flue gas generated by the slag stewing pool is conveyed into the dust removal device through the gas outlet pipeline, water spraying treatment is performed through the water spraying device, purification operation can be performed on the flue gas, the purified flue gas reaching the emission standard is discharged through the discharge device under the driving of the fan, and environmental pollution to the atmosphere and a plant area can be reduced.
According to the control method of the steel slag flue gas treatment system, the first section to be adjusted and the second section to be adjusted are additionally arranged on the basis of setting the threshold range on the basis of the prior art, and the opening degree and the opening time of the electric control valve are respectively preset when the pressure value of the pressure transmitter is in the first section to be adjusted or the second section to be adjusted, so that the control mode of the electric control valve is improved, and the service life of the electric control valve is prolonged; the fan interlocking control method improves the running mode of the fan, realizes automatic frequency conversion regulation of the fan, reduces power consumption and prolongs the service life of the fan.
Drawings
In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view (overhead view) of an embodiment of a steel slag flue gas treatment system provided by the present invention;
FIG. 2 is a schematic view of a dust collecting system and a dust removing system in an embodiment of the steel slag flue gas treatment system provided by the invention;
FIG. 3 is a schematic diagram of an embodiment of a water supply system in an embodiment of a steel slag flue gas treatment system provided by the present invention;
FIG. 4 is a schematic flow chart of a method for controlling the pressure of a dust collecting system in the method for controlling a steel slag flue gas treatment system provided by the invention;
fig. 5 is a schematic diagram of an electronic device provided by the present invention.
Reference numerals are as follows:
1. a slag stewing pool; 2. an air outlet pipe; 3. a dust collecting duct; 4. a dust removal device; 5. a sedimentation tank; 6. a clean water tank; 7. a cold water tank; 8. a water cooling tower; 9. a tower feeding pump; 10. a circulation pump; 11. a slurry pump; 12. a water replenishing pipe; 13. a water replenishing pump; 14. an electric control valve; 15. a fan; 16. a discharge device; 17. covering the residues; 18. a processor; 19. a communication interface; 20. a memory; 21. a communication bus.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
The steel slag flue gas treatment system, the system control method, the electronic device and the storage medium of the present invention are described below with reference to fig. 1 to 5.
Example 1-Steel slag flue gas treatment System
Fig. 1 is a schematic view of an embodiment of a steel slag flue gas treatment system provided by the present invention. The steel slag flue gas treatment system of the embodiment comprises:
as shown in fig. 2, in this embodiment, the dust collecting system includes a dust collecting pipe 3 and at least one slag stewing cover 17, the slag stewing cover 17 is used for covering the slag stewing pool 1 to seal the slag stewing pool 1, in specific implementation, the number of the slag stewing pool 1 is set according to requirements, the number of the slag stewing covers 17 corresponds to the number of the slag stewing pool 1, the slag stewing cover 17 is provided with gas outlet pipes 2, and all the gas outlet pipes 2 are communicated with the dust collecting pipe 3, so as to collect all the flue gas exhausted from the slag stewing pool 1 into the dust collecting pipe 3;
as shown in fig. 2, in this embodiment, the dust removing system includes a dust removing device 4, a water spraying device for spraying water to the flue gas is disposed in the dust removing device 4, and the dust removing device 4 is connected to the dust collecting pipeline 3. After the smoke is generated in the slag stewing pool 1, the smoke enters the dust removal device 4 along the air outlet pipeline 2 and the dust collection pipeline 3, and water sprayed by the water spraying device can be fused with solid particles in the smoke, so that the smoke purification effect is achieved. In this embodiment, be equipped with a plurality of nozzles in dust collector 4 as water jet equipment, can carry out water spray treatment in dust collector 4 uniformly, be convenient for carry out more complete, thoroughly purification treatment to the flue gas in it. In this embodiment, the fan 15 is used to drive the treated flue gas to be discharged through the discharge device 16;
as shown in fig. 3, in this embodiment, the water supply system includes a sedimentation tank 5, a clean water tank 6, and a cold water tank 7, the sedimentation tank 5 is used for collecting sewage discharged by the dust removing device 4, a first overflow port is provided between the sedimentation tank 5 and the clean water tank 6, a second overflow port is provided between the clean water tank 6 and the cold water tank 7, and the cold water tank 7 is connected to the water spraying device.
As shown in fig. 1 and 3, the water supply system further comprises a water cooling tower 8 for cooling the water in the clean water tank 6, the clean water tank 6 is connected with the water cooling tower 8, and the water cooling tower 8 is connected with the cold water tank 7; an upper tower pump 9 for pumping the water in the clean water tank 6 into the water cooling tower 8 is arranged between the clean water tank 6 and the water cooling tower 8. Specifically, in this embodiment, the water cooling tower 8 is disposed above the cold water tank 7, the water with a higher temperature (higher than a preset temperature) in the clean water tank 6 is pumped into the water cooling tower 8 under the action of the upper tower pump 9 to be cooled, the cooled water is directly discharged into the cold water tank 7 through the water cooling tower 8, and at this time, the water temperature meets the use requirement of the dust removing device 4.
As shown in fig. 1 and 3, in this embodiment, a circulation pump 10 for pumping water in the cold water tank 7 into the dust removing device 4 is disposed between the cold water tank 7 and the dust removing device 4, and the water pumped into the dust removing device 4 can be sprayed out through a nozzle and treat the flue gas.
In this embodiment, a temperature detection device for detecting the water temperature is provided in the clean water tank 6, and is used for monitoring the water temperature in the clean water tank 6 in real time. Of course, in some embodiments, a temperature detection device may be disposed at the outlet of the circulation pump 10, and the technical purpose of detecting the water temperature can be achieved. In some embodiments, a temperature detection device may be provided in the clean water tank 6 and at the outlet of the circulation pump 10 to facilitate simultaneous measurement of the temperature of the water in the clean water tank 6 and the temperature of the water flowing out through the circulation pump 10. To meet the use requirement of the dust removing device 4
As shown in fig. 3, in the present embodiment, a slurry pump 11 for discharging slurry is provided in the sedimentation tank 5, so as to discharge the slurry deposited on the bottom of the sedimentation tank 5.
As shown in fig. 3, in this embodiment, the water supply system further includes a water replenishing pipe 12 for replenishing water to the cold water tank 7, and a water replenishing pump 13 is disposed on the water replenishing pipe 12, so as to replenish water to the cold water tank 7 in the absence of water, so as to avoid delaying the operation of the dust removing device 4.
As shown in fig. 2, in this embodiment, a pressure transmitter for monitoring the pressure in the pipeline is disposed on outlet pipe 2, and an electric control valve 14 for adjusting the pressure in the pipeline is disposed on outlet pipe 2. The pressure transmitter and the electric regulating valve 14 are used in combination, and can monitor and regulate the pressure in the pipeline, so that the pressure is always kept in a proper range.
In this embodiment, level gauges for monitoring water levels are disposed in the sedimentation tank 5, the clean water tank 6 and the cold water tank 7. The liquid levels of the sedimentation tank 5, the clean water tank 6 and the cold water tank 7 can be monitored conveniently and respectively.
Example 2-control method of steel slag flue gas treatment system
The invention also provides a control method of the steel slag flue gas treatment system, which comprises a pressure control method of a dust collection system and a fan interlocking control method;
referring to fig. 4, the method for controlling the pressure of the dust collecting system of the present embodiment will now be described in detail. It should be noted that the following pressure threshold range, the first section to be adjusted, the second section to be adjusted, and the parameters such as the initial opening degree and the setting time are all exemplified and should be set according to actual situations.
Within a preset pressure threshold range P m ~P M Respectively add a first section to be adjusted and a second section to be adjusted near two ends of the base, the first section to be adjusted is P a ~P m The second section to be adjusted is P M ~P b . In the embodiment, the pressure threshold range is set to be-300 to-200 pa, the first section to be adjusted is-400 to-300 pa, and the second section to be adjusted is-200 to-100 pa;
when the pressure value detected by the pressure transmitter is less than P a (-400 pa) or greater than P b When (-100 pa), the opening degree of the electric regulating valve 14 is adjusted until the pressure value is in the first section to be adjusted or the second section to be adjusted. In this process, the step of adjusting the opening of the electrical control valve 14 includes:
controlling the electric regulating valve 14 to keep the initial opening degree at 20%, and maintaining the set time for 20s;
judging the pressure value range of the pressure value monitored by the pressure transmitter, and if the pressure value is still less than P a Or greater than P b When the pressure value is detected, the opening degree of the electric regulating valve 14 is increased step by taking 5% as a step degree and the set time is maintained for 20s until the pressure value monitored by the pressure transmitter is in a first section to be regulated or a second section to be regulated so as to enter the regulation of the next stage;
when the pressure value detected by the pressure transmitter is in the first section to be adjusted or the second section to be adjusted, the opening degree of the electric regulating valve 14 is continuously adjusted until the pressure value detected by the pressure transmitter falls into the pressure threshold value range P m ~P M . The step of the present embodiment of adjusting the opening of the electric control valve 14 in this process includes:
controlling the electric control valve 14 to maintain the current opening degree, which is the opening degree after the electric control valve 14 is adjusted in a stepping mode in the previous step (on the basis of the 20 percent, the opening degree after the electric control valve 14 is increased in a stepping mode for a plurality of times by taking 5 percent as the stepping degree), and maintaining the set time for 20s;
if the pressure value detected by the pressure transmitter falls into the pressure threshold value range P m ~P M Controlling the electric control valve 14 to keep the current opening degree;
when the pressure value detected by the pressure transmitter is in the first section to be adjusted, a plurality of value sections are preset, and in the concrete implementation, the value sections can be set according to P m And P a The difference being the whole range of the value section, e.g. the difference between the twoIf the value is 100, 100 may be divided into five numerical zones of 0 to 20, 20 to 40, 40 to 60, 60 to 80, and 80 to 100, where each numerical zone corresponds to a stepping increment value of the opening of the electric control valve 14, for example, 2%,4%,6%,8%, and 10%. Determining a pressure value and P detected by a pressure transmitter m Difference value C between 1 And taking its absolute value according to C 1 The numerical range in which the absolute value falls selects the step increment value by which the electric regulator valve 14 is correspondingly increased at the current opening degree, and is maintained for the set time 20s. For example, when C 1 When the absolute value of (C) is 50, the value falls into a numerical range of 40 to 60, the corresponding stepping increment value of the opening of the electric control valve 14 is 6 percent, and when C is 1 When the absolute value of the differential value is 70, the differential value falls into a numerical range of 60 to 80, and the stepping increment value of the corresponding opening of the electric control valve 14 is 8 percent;
when the pressure value detected by the pressure transmitter is in the second section to be adjusted, a plurality of numerical value sections are preset, and in the specific implementation, the numerical value sections can be set according to P b And P M The difference between the two values is taken as the overall range of the numerical zones, for example, if the difference between the two values is 100, then 100 can be divided into five numerical zones of 0 to 20, 20 to 40, 40 to 60, 60 to 80, and 80 to 100, and each numerical zone corresponds to a stepping increment value of the opening of the electric control valve 14, for example, -3%, -6%, -9%, -12%, and-15%. Determining a pressure value and P detected by a pressure transmitter M Difference value C between 2 According to C 2 The falling numerical range selects a step increment value by which the electric regulator valve 14 is increased correspondingly at the current opening degree. For example, when C 2 When the value of (C) is 10, the value falls into a numerical range of 0 to 20, the corresponding stepping increment value of the opening of the electric control valve 14 is-3 percent, and when C is 2 When the value of (1) is 90, the value falls into a numerical range of 80 to 100, and the stepping increment value of the corresponding opening degree of the electric control valve 14 is-15%.
Of course, in some embodiments, when the pressure value detected by the pressure transmitter is in the first section to be adjusted or the second section to be adjusted, the electric control valve may also be controlled by the following method:
when the pressure value detected by the pressure transmitter is in the first section to be adjusted, presetting a plurality of pressure valuesThe value section can be set according to P in specific implementation m And P a The difference between the two values is taken as the whole range of the numerical value ranges, for example, if the difference between the two values is 100, 100 can be divided into five numerical value ranges of 0 to 20, 20 to 40, 40 to 60, 60 to 80, and 80 to 100, and each numerical value range corresponds to the opening degree value of one electric control valve 14, for example, 32%,34%,36%,38%, and 40%. Determining a pressure value and P detected by a pressure transmitter m Difference value C between 1 And taking its absolute value according to C 1 The value section in which the absolute value falls corresponds to the opening degree of the electric control valve 14 and is maintained for the set time 20s. E.g. C 1 When the absolute value of (A) is 50, the absolute value falls into a numerical range of 40 to 60, the opening degree of the corresponding electric control valve 14 is 36 percent, and C 1 When the absolute value of the value is 70, the value falls into a numerical range of 60 to 80, and the opening degree of the corresponding electric control valve 14 is 38 percent;
when the pressure value detected by the pressure transmitter is in the second section to be adjusted, a plurality of value sections are preset, and in specific implementation, the value sections can be set according to P b And P M The difference between the two values is taken as the whole range of the numerical value ranges, for example, if the difference between the two values is 100, 100 can be divided into five numerical value ranges of 0 to 20, 20 to 40, 40 to 60, 60 to 80, and 80 to 100, and each numerical value range corresponds to the opening degree value of one electric control valve 14, for example, 45%,42%,39%,36%, and 33%. Determining a pressure value and P detected by a pressure transmitter M Difference value C between 2 According to C 2 The falling value section is set to the opening degree of the electric control valve 14 and maintained for a set time 20s. For example, C 2 When the value of (b) is 10, the value falls into a numerical range of 0 to 20, the opening of the corresponding electric control valve 14 is 45%, and C 2 When the value of (3) is 90, the opening degree of the corresponding electric control valve 14 is 33% and the range falls within a numerical range of 80 to 100.
In the pressure control method of the dust collecting system of the present embodiment, the method of presetting the pressure threshold range includes: presetting a flue gas concentration range, equally dividing the preset flue gas concentration range into a plurality of sections, wherein each flue gas concentration section corresponds to a preset different pressure threshold range, arranging a flue gas concentration sensing device on the gas outlet pipeline 2 to collect the flue gas concentration, and determining the corresponding pressure threshold range according to the section where the collected flue gas concentration is located. Of course, the preset pressure threshold range may also be determined in two ways in specific implementations: (1) According to experience setting, in the mode, workers judge different stages of slag stewing through experience, wherein the different stages correspond to different pressure threshold ranges; and (2) the slag stewing pool 1 comprises a plurality of water beating stages when working. The water fetching amount is set in each stage, and the amount of smoke generated in each stage is different. In addition, the current slag stewing stage can also be determined according to the total water fetching amount. Each stage lasts for the corresponding slag stewing time. The current slag stewing stage can be determined according to time. And the system is in communication connection with the slag stewing system, the slag stewing stages of the corresponding slag stewing pool 11 at present are collected, and different preset pressure threshold value ranges are determined according to different slag stewing stages.
As an example, the preset pressure threshold range is obtained by analyzing the slag stewing stage information representing the slag stewing pool 1 through an artificial intelligence chip included in the system. The machine learning model carried by the artificial intelligence chip is obtained by training a training sample set.
The training sample set comprises sample slag stewing stage information and a sample preset pressure threshold range, and the machine learning model is obtained by training with the sample slag stewing stage information as input and the sample preset pressure threshold range as expected output.
As an example, the machine learning model may be obtained by performing the following training steps based on a set of training samples: respectively inputting the sample slag stewing stage information of at least one training sample in the training sample set into an initial machine learning model to obtain a corresponding preset pressure threshold range; comparing a preset pressure threshold range corresponding to the slag stewing stage information of each sample in the at least one training sample with a corresponding sample preset pressure threshold range; determining the prediction accuracy of the initial machine learning model according to the comparison result; determining whether the prediction accuracy is greater than a preset accuracy threshold; in response to determining that the accuracy is greater than the preset accuracy threshold, taking the initial machine learning model as a trained machine learning model; and adjusting parameters of the initial machine learning model in response to the determination that the accuracy is not greater than the preset accuracy threshold, forming a training sample set by using unused training samples, using the adjusted initial machine learning model as the initial machine learning model, and executing the training step again. It can be understood that after the training, the machine learning model can be used for representing the corresponding relation between the slag stewing stage information and the preset pressure threshold value range. The above-mentioned machine learning model may be a convolutional neural network model.
As an example, the machine learning model may include the slag stewing stage information and the correspondence table. The corresponding relation table may be a corresponding relation table based on the corresponding relation between a large amount of slag stewing stage information and a preset pressure threshold range by a person skilled in the art. And if one of the slag stewing stage information in the corresponding relation table is the same as or close to the slag stewing stage information, taking a preset pressure threshold value range corresponding to the slag stewing stage information in the corresponding relation table as a preset pressure threshold value range indicated by the slag stewing stage information. The controller can determine the range of the preset pressure threshold value according to the slag stewing stage information. Therefore, different preset pressure threshold value ranges are configured according to different raw material information. The higher the preset pressure threshold range, the greater the impact force on the sealing product and the connection. Therefore, aiming at the sealed products with different raw material information, the preset pressure threshold range is adjusted, and the cleaning effect can be effectively improved.
As another example, the initial machine learning model may be an untrained deep learning model or an untrained deep learning model, and each layer of the initial deep learning model may be provided with initial parameters, and the parameters may be continuously adjusted during the training of the deep learning model. The initial deep learning model may be various types of untrained or untrained artificial neural networks or a model obtained by combining a plurality of types of untrained or untrained artificial neural networks, for example, the initial deep learning model may be an untrained convolutional neural network, an untrained cyclic neural network, or a model obtained by combining an untrained convolutional neural network, an untrained cyclic neural network, and an untrained fully-connected layer. In this way, the viscosity of the raw material can be input from the input side of the deep learning model, sequentially subjected to the processing of the parameters of each layer in the deep learning model, and output from the output side of the deep learning model, and the information output by the output side is the preset pressure threshold range.
Therefore, the preset pressure threshold value is more intelligent and automatic, and the reliability of the system is improved.
Compared with the prior art, the pressure control method of the dust collection system of the embodiment can solve the new technical problem that the pressure in the dust collection pipeline is unstable due to the fact that the pressure change amplitude is too large in the process of adjusting the electric adjusting valve.
Specifically, if only the pressure threshold range P is set m ~P M The electric control valve is continuously opened or closed to meet the set pressure threshold range P m ~P M However, the pressure in the dust collecting duct suddenly changes, which causes a burden on the operation of the fan. The pressure control method of the dust collecting system of the embodiment has a buffering effect for the adjustment of the electric control valve by introducing the first section to be adjusted and the second section to be adjusted. Meanwhile, the mode of increasing/reducing the opening of the electric regulating valve in a stepping mode is adopted, so that the pressure in the dust collecting pipeline can be gradually changed, and the pressure in the dust collecting pipeline is more stable.
Furthermore, if the detected pressure value is at P m 、P M The electric control valve can be repeatedly operated due to repeated jumping, and the preset time is maintained after the electric control valve is adjusted, so that the operation of the electric control valve can be reduced, and the service life can be prolonged.
When the pressure is in the first section to be adjusted or the second section to be adjusted, the pressure is continuously determined to be C 1 Or C 2 The corresponding step increment value is selected to adjust the pressure step by step, as opposed to adjusting at a fixed step value,the adjustment is more flexible and adaptive, and the adjustment efficiency and accuracy can be accelerated.
The fan interlock control method of the present embodiment will be specifically described below. In this embodiment, the blower interlocking control method includes:
and presetting the operating frequency corresponding to the fan 15 when different slag stewing ponds operate. In this embodiment, the following settings are set: when 1-2 slag stewing pools 1 are subjected to thermal stewing, the operating frequency of a fan 15 is set to be 20Hz; when 3-4 slag stewing pools 1 are stewed, the operating frequency of a fan 15 is set to be 30Hz; when the slag stewing ponds 1 of 5-8 are stewed, the operating frequency of the fan 15 is set to be 45Hz.
Collecting a water fetching signal of the slag stewing pool 1, wherein the water fetching signal is collected by the following way: a flowmeter is arranged in a water pipeline for steel slag water removal, and the flowmeter can transmit the numerical value to plc;
if the flow meter value received by the plc is not 0, a water-fetching signal is indicated, namely the corresponding slag stewing pool 1 is in a working state, and the number of the slag stewing pools 1 in the working state is determined according to the water-fetching signal;
and correspondingly controlling the running frequency of the fans according to the number of the slag stewing ponds 1 in the working state.
For example, when the number of the slag stewing ponds 1 in the working state is determined to be 3 or 4 according to the collected water beating signals, the operating frequency of the fan 15 is set to be 30Hz; when the number of the slag stewing ponds 1 in the working state is determined to be 5 or 6 according to the collected water beating signals, the operating frequency of the fan 15 is set to be 45Hz.
In specific implementation, the number of the working slag stewing ponds 1 can be determined in the following way: the system is in communication connection with the slag stewing ponds 1, and the working state of each slag stewing pond 1 is directly checked. For example, a trigger device is arranged on the slag stewing pool 1, and when the slag stewing cover 17 covers the slag stewing pool 1, the trigger device sends a signal to plc to indicate that the slag stewing pool 1 is in a working state.
In the blower interlocking control method of this embodiment, a deceleration pressure value and a speed-up pressure value are preset, and a deceleration frequency and a speed-up frequency of the blower 15 are preset correspondingly, when the pressure value of the pressure transmitter is detected to be lower than the deceleration pressure value, the blower 15 is controlled to decelerate to the deceleration frequency, and when the pressure value of the pressure transmitter is detected to be higher than the speed-up pressure value, the blower 15 is controlled to accelerate to the speed-up frequency.
Fig. 5 illustrates a physical structure diagram of an electronic device, which may include: a processor 18 (processor), a communication Interface 19 (communication Interface), a memory 20 (memory), and a communication bus 21, wherein the processor 18, the communication Interface 19, and the memory 20 complete communication with each other through the communication bus 21. The processor 18 may invoke logic instructions in memory 20 to perform the slag flue gas treatment system control method of the present invention, including the dust collection system pressure control method and the fan interlock control method as described in example 2.
Furthermore, the logic instructions in the memory 20 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention or a part thereof which substantially contributes to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention further provides a non-transitory computer readable storage medium, on which a computer program is stored, the computer program, when executed by a processor, implements a method for controlling a steel slag flue gas treatment system provided by the above methods, the method comprising a dust collection system pressure control method and a fan interlock control method as described in embodiment 2.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment may be implemented by software plus a necessary general hardware platform, and may also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A control method of a steel slag flue gas treatment system is characterized in that the method is applied to the steel slag flue gas treatment system, and the steel slag flue gas treatment system comprises:
the device comprises a dust collecting system and a dust collecting system, wherein the dust collecting system comprises a dust collecting pipeline and at least one slag stewing cover, the slag stewing cover is used for being buckled on a slag stewing pool to seal the slag stewing pool, an air outlet pipeline is arranged on the slag stewing cover, all the air outlet pipelines are communicated with the dust collecting pipeline, a pressure transmitter for monitoring the pressure in the pipeline is arranged on the air outlet pipeline, and an electric regulating valve for regulating the pressure in the pipeline is arranged on the air outlet pipeline;
the dust removal system comprises a dust removal device, a fan and a discharge device which are sequentially connected, wherein an air inlet end of the fan is connected with the dust removal device, an air outlet end of the fan is connected with the discharge device, and the dust removal device is connected with the air outlet pipeline; the fan can adjust the running frequency according to the working number of the slag stewing pool;
the control method of the steel slag flue gas treatment system comprises a dust collecting system pressure control method and a fan interlocking control method;
the dust collection system pressure control method includes:
within a preset pressure threshold range P m ~P M A first section to be adjusted and a second section to be adjusted are respectively added near the two ends of the base, wherein the first section to be adjusted is P a ~P m The second section to be adjusted is P M ~P b ；
When the pressure value detected by the pressure transmitter is less than P a Or greater than P b When the pressure value is in the first section to be adjusted or the second section to be adjusted, adjusting the opening of the electric regulating valve until the pressure value is in the first section to be adjusted or the second section to be adjusted;
when the pressure value detected by the pressure transmitter is in the first section to be adjusted or the second section to be adjusted, the opening of the electric regulating valve is continuously adjusted until the pressure value detected by the pressure transmitter falls into a pressure threshold value range P m ~P M ；
The fan interlocking control method comprises the following steps:
collecting a water fetching signal of the slag stewing pool;
determining the number of the slag stewing ponds in the working state according to the water beating signal;
and correspondingly controlling the running frequency of the fan according to the number of the slag stewing ponds in the working state.
2. The steel slag flue gas treatment system of claim 1The control method is characterized in that: in the pressure control method of the dust collecting system, when the pressure value detected by the pressure transmitter is less than P a Or greater than P b The step of adjusting the opening of the electric regulating valve comprises the following steps:
controlling the electric regulating valve to keep the initial opening and maintaining the set time;
judging the pressure value range of the pressure value monitored by the pressure transmitter, and if the pressure value is still less than P a Or greater than P b And when the pressure value is detected, the opening degree of the electric regulating valve is increased step by step and the set time is maintained until the pressure value monitored by the pressure transmitter is in the first section to be regulated or the second section to be regulated.
3. The control method of the steel slag flue gas treatment system according to claim 1, wherein the control method comprises the following steps: in the pressure control method of the dust collection system, when the pressure value detected by the pressure transmitter is in the first section to be adjusted or the second section to be adjusted, the step of adjusting the opening of the electric regulating valve comprises the following steps:
controlling the electric regulating valve to keep the current opening and maintaining the set time;
if the pressure value detected by the pressure transmitter falls into the pressure threshold value range P m ~P M Controlling the electric regulating valve to keep the current opening degree;
when the pressure value detected by the pressure transmitter is in the first section to be adjusted, presetting a plurality of numerical value sections, wherein each numerical value section corresponds to a stepping increment value of the opening of the electric regulating valve, and determining the pressure value detected by the pressure transmitter and P m Difference value C between 1 And taking its absolute value according to C 1 Selecting the stepping increment value which is correspondingly increased under the current opening degree of the electric control valve in the numerical value section in which the absolute value falls, and maintaining the set time;
when the pressure value detected by the pressure transmitter is in the second section to be adjusted, presetting a plurality of numerical value sections, wherein each numerical value section corresponds to a stepping increment value of the opening of the electric regulating valve, and determining the pressure value detected by the pressure transmitter and P M Difference value C between 2 According to C 2 And the falling numerical value section selects the stepping increment value which is correspondingly increased under the current opening degree of the electric control valve, and maintains the set time.
4. The control method of the steel slag flue gas treatment system according to claim 1, characterized in that: in the pressure control method of the dust collection system, the step of presetting the pressure threshold range includes: presetting a smoke concentration range, equally dividing the preset smoke concentration range into a plurality of sections, wherein each smoke concentration section corresponds to a preset different pressure threshold range, arranging a smoke concentration sensing device on the air outlet pipeline to collect the smoke concentration, and determining the corresponding pressure threshold range according to the section where the collected smoke concentration is located.
5. The control method of the steel slag smoke treatment system according to any one of claims 1 to 4, wherein the control method comprises the following steps: in the fan interlocking control method, a deceleration pressure value and an acceleration pressure value are preset, the deceleration frequency and the acceleration frequency of the fan are correspondingly preset, when the pressure value of the pressure transmitter is detected to be lower than the deceleration pressure value, the fan is controlled to decelerate to the deceleration frequency, and when the pressure value of the pressure transmitter is detected to be higher than the acceleration pressure value, the fan is controlled to accelerate to the acceleration frequency.
6. An electronic device comprising a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor implements the method for controlling the steel slag flue gas treatment system according to any one of claims 1 to 5 when executing the program.
7. A non-transitory computer readable storage medium having a computer program stored thereon, wherein the computer program when executed by a processor implements the method for controlling a steel slag smoke processing system according to any one of claims 1 to 5.
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| DE10142040A1 (en) * | 2000-09-27 | 2002-06-27 | Continental Teves Ag & Co Ohg | Method and control system for controlling an electronically controllable brake actuation system |
| CN205473867U (en) * | 2016-03-08 | 2016-08-17 | 中冶南方工程技术有限公司 | LF stove dust pelletizing system |
| CN210438761U (en) * | 2019-08-06 | 2020-05-01 | 天津华赛尔传热设备有限公司 | Steel stewing slag steam waste heat recovery system |
| CN110499401B (en) * | 2019-09-26 | 2023-05-05 | 中冶节能环保有限责任公司 | Air distribution control device and air distribution control method capable of automatically adjusting uniformity of flow field |
| CN114669571B (en) * | 2022-03-16 | 2023-10-27 | 新兴铸管股份有限公司 | Vapor collecting device and method for steel slag heat braising vapor dust removal |
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