CN115212997A - Circulating air dew point controllable crushing system and dew point control method - Google Patents
Circulating air dew point controllable crushing system and dew point control method Download PDFInfo
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- CN115212997A CN115212997A CN202210770019.9A CN202210770019A CN115212997A CN 115212997 A CN115212997 A CN 115212997A CN 202210770019 A CN202210770019 A CN 202210770019A CN 115212997 A CN115212997 A CN 115212997A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 47
- 238000001914 filtration Methods 0.000 claims abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 11
- 239000003245 coal Substances 0.000 claims description 17
- 238000010298 pulverizing process Methods 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 7
- 238000010790 dilution Methods 0.000 claims description 4
- 239000012895 dilution Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 description 11
- 239000002817 coal dust Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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Abstract
The invention discloses a circulating air dew point controllable crushing system and a dew point control method, wherein the circulating air dew point controllable crushing system comprises: the device comprises a crushing device, a filtering device, an air supply device, a dew point adjusting device and a detection control device. The crushing device is used for crushing and processing solid raw materials, the filtering device is used for receiving and filtering the crushed solid raw materials, and the air supply device is used for supplying air to the crushing device. The pipeline between the filtering device and the air supply device is a circulating air pipeline, the dew point adjusting device is connected with the circulating air pipeline, the detection control device is connected with the circulating air pipeline and the dew point adjusting device, and the detection control device corrects the dew point temperature of the gas in the circulating air pipeline by comparing and analyzing the deviation value between the temperature data and the preset value of the detection control device to control the dew point adjusting device. The crushing system with the controllable circulating air dew point, provided by the embodiment of the invention, realizes automatic control of the dew point temperature of gas in a circulating air pipeline, and further improves the stability of system operation.
Description
Technical Field
The invention relates to the field of automatic control, in particular to a circulating air dew point controllable crushing system and a dew point control method.
Background
The dense phase conveying of the coal powder is one of the key technologies in dry coal powder gasification, and has the characteristics of large solid-gas ratio, low flow velocity, low energy consumption and strong conveying capacity. The dense phase transportation of the dry pulverized coal has high requirements on the dew point of circulating air in the transportation process, and the transportation is unstable and even blocked due to the overhigh dew point. In the related art, the pulverized coal conveying system neglects automatic control of the dew point of circulating air, thereby seriously increasing the uncertainty of the system and influencing the stability of the operation of the system.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides a crushing system with controllable circulating air dew points, which can safely, stably, accurately and efficiently realize automatic control of the circulating air dew points.
The embodiment of the invention also provides a dew point control method which has the characteristics of safety, stability, accuracy and high efficiency.
The controllable crushing system of circulated air dew point of the embodiment of the invention comprises: the device comprises a crushing device, a filtering device, an air supply device, a dew point adjusting device and a detection control device, wherein the crushing device is used for crushing and processing solid raw materials, the crushing device is connected with the filtering device through a pipeline, the filtering device is used for receiving and filtering the crushed solid raw materials, the air supply device is connected with the crushing device through a pipeline, the air supply device is used for supplying air to the crushing device, the filtering device is connected with the air supply device through a pipeline, the air supply device is also used for receiving gas output by the filtering device, the pipeline between the filtering device and the air supply device is a circulating air pipeline, the dew point adjusting device is connected with the circulating air pipeline, the dew point adjusting device is used for adjusting the dew point temperature of the gas in the circulating air pipeline, the detection control device is used for detecting the dew point temperature of the gas in the circulating air pipeline and generating temperature data, and the detection control device controls the deviation value between the temperature data and the preset value of the detection control device to correct the dew point temperature of the gas in the circulating air pipeline through contrastive analysis.
According to the crushing system with the controllable circulating air dew point, disclosed by the embodiment of the invention, the detection control device is used for detecting the dew point temperature of the gas in the circulating air pipeline, and the detection control device is used for comparing and analyzing the deviation value between the temperature data and the preset value so as to judge whether the dew point temperature of the gas in the circulating air pipeline needs to be corrected by controlling the dew point adjusting device, so that the aim of automatically controlling the dew point temperature of the gas in the circulating air pipeline is fulfilled, and the running stability of the system is further improved.
Therefore, the crushing system with the controllable circulating air dew point solves the problem of unstable coal powder conveying.
In some embodiments, the dew point adjusting device is connected to the circulating air pipeline through a pipeline, the pipeline between the dew point adjusting device and the circulating air pipeline is an air conveying pipeline, and the dew point adjusting device adjusts the dew point temperature of the gas in the circulating air pipeline by conveying the air in the external environment into the circulating air pipeline through the air conveying pipeline.
In some embodiments, the detection control means comprises: dew point detector, dew point controller, flowmeter, flow controller and governing valve, dew point detector establishes in the circulation wind pipeline, dew point detector is used for detecting gaseous dew point temperature in the circulation wind pipeline and generate temperature data, dew point controller with dew point detector links to each other in order to receive temperature data, dew point controller is through contrastive analysis temperature data with deviation value between dew point controller's the default is in order to generate temperature difference data, the flowmeter is established in the air transportation pipeline, the flowmeter is used for measuring the flow of air in the air transportation pipeline and generate flow data, flow controller with dew point controller with the flowmeter links to each other in order to receive temperature difference data with flow data, the governing valve is established on the air transportation pipeline, flow controller with the governing valve links to each other, flow controller is used for the basis temperature difference data with flow data control the aperture of governing valve.
In some embodiments, the dew point controller is connected to the dew point adjusting device, and the dew point controller is configured to control the starting and stopping of the dew point adjusting device according to the temperature difference data.
In some embodiments, the dew point adjusting device is an air dilution fan.
In some embodiments, the air conditioner further comprises a circulating fan, and the circulating fan is arranged on the circulating air pipeline.
In some embodiments, the crushing device is a coal mill, the filtering device is a coal dust filter, and the air supply device is a hot blast stove.
The dew point control method provided by the embodiment of the invention is used for the circulating air dew point controllable crushing system provided by any embodiment, and comprises the following steps: the detection control device detects the dew point temperature of the gas in the circulating air pipeline and generates temperature data; the detection control device compares and analyzes a deviation value between the temperature data and a preset value of the detection control device; the detection control device controls the dew point adjusting device to be opened and closed according to the deviation value; and when the dew point adjusting device is opened, the dew point adjusting device corrects the dew point temperature of the gas in the circulating air pipeline.
In some embodiments, the control method of the dew point adjusting device comprises: the dew point detector detects the dew point temperature of the gas in the circulating air pipeline and generates temperature data, and the dew point detector transmits the temperature data to the dew point controller; and the dew point controller compares and analyzes deviation values between the temperature data and preset values of the dew point controller and generates temperature difference data, and the dew point controller controls the opening and closing of the dew point adjusting device according to the temperature difference data.
In some embodiments, the method for correcting the dew-point temperature of the gas in the circulating air pipeline comprises the following steps: the dew point controller transmits the temperature difference data to a flow controller; the flow meter measures the flow of air in the air conveying pipeline and generates flow data, and the flow meter transmits the flow data to a flow controller; and the flow controller controls the opening of the regulating valve according to the temperature difference data and the flow data so that the dew point regulating device regulates the dew point temperature of the gas in the circulating air pipeline to be consistent with the preset value of the dew point controller.
Drawings
FIG. 1 is a schematic view of a circulating air dew point controllable pulverizing system according to an embodiment of the present invention.
Reference numerals are as follows:
a crushing device 1, a coal mill 101,
A filter device 2, a coal dust filter 201,
An air supply device 3, a hot blast stove 301,
A dew point adjusting device 4, an air dilution fan 401,
A dew point detector 501, a dew point controller 502, a flow meter 503, a flow controller 504, an adjusting valve 505, a,
A circulating air pipeline 6, an air conveying pipeline 7 and a circulating fan 8.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a circulating air dew point controllable pulverizing system according to an embodiment of the present invention with reference to the accompanying drawings.
As shown in fig. 1, the crushing system with controllable circulating air dew point according to the embodiment of the present invention includes: the device comprises a crushing device 1, a filtering device 2, an air supply device 3, a dew point adjusting device 4 and a detection control device.
The crushing apparatus 1 is used for crushing and processing a solid raw material. The crushing device 1 is connected with the filtering device 2 through a pipeline, and the filtering device 2 is used for receiving crushed solid raw materials and filtering the crushed solid raw materials. The air supply device 3 is connected with the crushing device 1 through a pipeline, and the air supply device 3 is used for supplying air to the crushing device 1. The filtering device 2 is connected with the air supply device 3 through a pipeline, the air supply device 3 is also used for receiving the gas output by the filtering device 2, and the pipeline between the filtering device 2 and the air supply device 3 is a circulating air pipeline 6.
The dew point adjusting device 4 is connected with the circulating air pipeline 6, and the dew point adjusting device 4 is used for adjusting the dew point temperature of the gas in the circulating air pipeline 6. The detection control device is connected with the circulating air pipeline 6 and the dew point adjusting device 4, and is used for detecting the dew point temperature of the gas in the circulating air pipeline 6 and generating temperature data. The detection control device controls the dew point adjusting device 4 to correct the dew point temperature of the gas in the circulating air pipeline 6 by comparing and analyzing deviation values between the temperature data and preset values of the detection control device.
The crushing apparatus 1 crushes and grinds a solid raw material to produce a powdery processed product, and the air blowing apparatus 3 blows air to the crushing apparatus 1 so that the crushing apparatus 1 conveys the powdery processed product to the filtering apparatus 2 through a pipeline by wind power. The filter device 2 filters the powdery processed object, and the filter device 2 is provided with a powder discharge port and a gas outlet. The filtered powder processed object is discharged through the powder discharge port, and the gas in the filtering device 2 is discharged through the gas outlet and is input into the air supply device 3 again through the circulating air pipeline 6, so that a circulating wind power conveying system is formed.
For example, the solid raw material is coal briquettes, the coal briquettes are crushed and ground into coal powder by the crushing device 1, and the coal powder is conveyed to the filtering device 2 by the crushing device 1 through a pipeline by using circulating air. The filtering device 2 filters the coal dust, and the filtered coal dust is discharged through the powder discharge port. The powder discharge port of the filter device 2 is connected with a subsequent pulverized coal conveying system so as to convey pulverized coal to other devices for processing, storage or use. The gas in the filter device 2 enters the circulating air pipeline 6.
Alternatively, as shown in fig. 1, the dew point adjusting device 4 is connected to the circulating air pipeline 6, and the dew point adjusting device 4 is used for adjusting the dew point temperature of the gas in the circulating air pipeline 6. When the dew point temperature of the gas in the circulating air pipeline 6 rises, in order to avoid the occurrence of unstable conveying or blockage of the circulating air pipeline 6 caused by overhigh dew point temperature of the gas, the dew point adjusting device 4 is used for reducing the dew point temperature of the gas in the circulating air pipeline 6, so that the running stability of the circulating air dew point controllable pulverizing system provided by the embodiment of the invention is improved.
Further, the detection control device is connected with the circulating air pipeline 6. First, a preset value of the detection control device is set. Then, the dew-point temperature of the gas in the circulating air pipeline 6 is detected by using the detection control device, the relation between the dew-point temperature of the gas in the circulating air pipeline 6 and the preset value of the detection control device is judged, and whether the dew-point temperature of the gas in the circulating air pipeline 6 needs to be adjusted by using the dew-point adjusting device 4 or not is considered.
The detection control device is connected to the dew-point adjusting device 4 so that the detection control device controls the dew-point adjusting device 4 to correct the dew-point temperature of the gas in the circulating air duct 6. Specifically, the detection control device detects the dew point temperature of the gas in the circulating air pipeline 6 and generates temperature data, and the detection control device contrasts and analyzes the deviation value between the temperature data and the preset value of the detection control device. If the temperature data is higher than the preset value of the detection control device, the detection control device controls the dew point adjusting device 4 to automatically correct the dew point temperature of the gas in the circulating air pipeline 6, so that the corrected dew point temperature is consistent with the preset value.
Therefore, in the crushing system with controllable circulating air dew point of the embodiment of the invention, the detection control device is used for detecting the dew point temperature of the gas in the circulating air pipeline 6, and the detection control device compares and analyzes the deviation value between the temperature data and the preset value to judge whether the dew point adjusting device 4 needs to be controlled to correct the dew point temperature of the gas in the circulating air pipeline 6, so that the aim of automatically controlling the dew point temperature of the gas in the circulating air pipeline 6 is fulfilled, and the running stability of the system is further improved.
Therefore, the crushing system with the controllable circulating air dew point solves the problem of unstable coal powder conveying.
In some embodiments, as shown in fig. 1, the dew point adjusting device 4 is connected to the circulating air pipeline 6 via a pipeline, the pipeline between the dew point adjusting device 4 and the circulating air pipeline 6 is an air conveying pipeline 7, and the dew point adjusting device 4 adjusts the dew point temperature of the air in the circulating air pipeline 6 by conveying the air in the external environment into the circulating air pipeline 6 via the air conveying pipeline 7.
It can be understood that the dew-point temperature of the gas in the circulating air pipeline 6 is corrected by inputting air into the circulating air pipeline 6 through the dew-point adjusting device 4 to reduce the dew-point temperature of the gas in the circulating air pipeline 6.
Optionally, the dew point adjusting means 4 has an input and an output. The input end of the dew point adjusting device 4 is communicated with the external environment to absorb air in the external environment, the output end of the dew point adjusting device 4 is connected with one end of the air conveying pipeline 7, and the dew point adjusting device 4 inputs the absorbed air into the air conveying pipeline 7. The other end of the air delivery pipeline 7 is connected with the circulating air pipeline 6 so as to deliver the air in the air delivery pipeline 7 into the circulating air pipeline 6, thereby achieving the effect of correcting the dew-point temperature of the gas in the circulating air pipeline 6.
In some embodiments, as shown in fig. 1, the detection control means comprises: dew point detector 501, dew point controller 502, flow meter 503, flow controller 504 and regulating valve 505.
The dew point detector 501 is arranged in the circulating air pipeline 6, and the dew point detector 501 is used for detecting the dew point temperature of the gas in the circulating air pipeline 6 and generating temperature data. The dew point controller 502 is connected to the dew point detector 501 for receiving the temperature data, and the dew point controller 502 generates temperature difference data by comparing and analyzing deviation values between the temperature data and preset values of the dew point controller 502. A flow meter 503 is provided in the air delivery pipe 7, and the flow meter 503 is used to measure the flow rate of air in the air delivery pipe 7 and generate flow rate data. The flow controller 504 is coupled to the dew point controller 502 and the flow meter 503 to receive temperature differential data and flow data. An adjusting valve 505 is provided on the air delivery line 7, and a flow controller 504 is connected to the adjusting valve 505, the flow controller 504 being configured to control the opening degree of the adjusting valve 505 based on the temperature difference data and the flow data.
Optionally, an output of the dew point detector 501 is connected to an input of the dew point controller 502, and the dew point detector 501 transmits the temperature data to the dew point controller 502. After the dew point controller 502 receives the temperature data, the dew point controller 502 calculates the temperature data and a preset value and compares and analyzes the temperature data and the preset value to obtain temperature difference data. The output of the dew point controller 502 is connected to the input of a flow controller 504, and the dew point controller 502 transmits the temperature differential data to the flow controller 504. The output of the flow meter 503 is also connected to the input of the flow controller 504, and the flow meter 503 transmits flow data to the flow controller 504. The output end of the flow controller 504 is connected with the control end of the regulating valve 505, and the flow controller 504 controls the opening degree of the regulating valve 505 according to the temperature difference data and the flow data.
Therefore, the dew point detector 501, the dew point controller 502, the flowmeter 503, the flow controller 504 and the regulating valve 505 are mutually and jointly used to realize safe, stable, accurate and efficient automatic control of the dew point temperature of the gas in the circulating air pipeline 6, thereby improving the stability of the system operation.
Specifically, both dew point controller 502 and flow controller 504 are DCS systems and both dew point controller 502 and flow controller 504 are PID controllers.
In some embodiments, as shown in fig. 1, a dew point controller 502 is connected to the dew point adjusting means 4, the dew point controller 502 being adapted to control the activation and deactivation of the dew point adjusting means 4 based on the temperature difference data.
It will be appreciated that the dew point adjusting means 4 is not always in operation. The dew point controller 502 controls the start and stop of the dew point adjusting device 4 according to whether the dew point temperature of the gas in the circulating air duct 6 needs to be corrected or not. In other words, when the dew point temperature of the gas in the circulating air duct 6 is too high, the dew point controller 502 controls the dew point adjusting device 4 to start operating. When the dew-point temperature of the gas in the circulating air pipeline 6 is at a normal value, the dew-point controller 502 controls the dew-point adjusting device 4 to stop operating.
Further, the dew-point controller 502 is also used for adjusting the operation power of the dew-point adjusting device 4 according to the temperature difference data, so as to improve the efficiency of correcting the dew-point temperature of the gas in the circulating air pipeline 6. The operating power of the dew point adjusting device 4 is matched with the opening degree of the adjusting valve 505, and the higher the operating power of the dew point adjusting device 4 is, the larger the opening degree of the adjusting valve 505 is. Specifically, the dew point adjusting device 4 is an air dilution fan 401.
In some embodiments, as shown in fig. 1, a circulating fan 8 is further included, and the circulating fan 8 is disposed on the circulating air pipe 6.
Alternatively, as shown in fig. 1, the circulating wind duct 6 includes a first duct portion and a second duct portion. One end of the first pipe part is connected with the gas outlet of the filtering device 2, and the other end of the first pipe part is connected with the input end of the circulating fan 8. One end of the second pipe part is connected with the gas inlet of the air supply device 3, and the other end of the second pipe part is connected with the output end of the circulating fan 8. The air delivery line 7 is connected to the second duct portion so that air in the air delivery line 7 is delivered directly into the second duct portion.
In some embodiments, the pulverizing device 1 is a coal mill 101, the filtering device 2 is a coal dust filter 201, and the air supply device 3 is a hot blast stove 301.
The dew point control method of the embodiment of the invention is used for the crushing system with controllable circulating air dew point of any embodiment, and comprises the following steps:
the detection control device detects the dew point temperature of the gas in the circulating air pipeline 6 and generates temperature data, and the detection control device compares and analyzes deviation values between the temperature data and preset values of the detection control device. The detection control device controls the dew point adjusting device 4 to be opened and closed according to the deviation value, and when the dew point adjusting device 4 is opened, the dew point adjusting device 4 corrects the dew point temperature of the gas in the circulating air pipeline 6.
According to the dew point control method provided by the embodiment of the invention, an automatic control mode is adopted, the detection control device is used for analyzing the dew point temperature of the gas in the circulating air pipeline 6 and controlling the dew point adjusting device 4 to automatically correct the dew point temperature of the gas in the circulating air pipeline 6, so that the dew point temperature of the gas in the circulating air pipeline 6 is consistent with the preset value of the detection control device, the automatic control of the dew point temperature of the gas in the circulating air pipeline 6 is realized, manual operation is not required, and the automation degree is higher.
In some embodiments, the method of controlling the dew point adjusting means 4 comprises:
the dew point detector 501 detects the dew point temperature of the gas in the circulating air pipeline 6 and generates temperature data, and the dew point detector 501 transmits the temperature data to the dew point controller 502. The dew point controller 502 compares the analyzed temperature data with a deviation value between preset values of the dew point controller 502 and generates temperature difference data, and the dew point controller 502 controls the opening and closing of the dew point adjusting device 4 according to the temperature difference data.
It can be understood that when the dew point temperature of the gas in the circulating air pipeline 6 detected by the dew point detector 501 is too high, the dew point controller 502 controls the dew point adjusting device 4 to start operating. When the dew point temperature of the gas in the circulating air pipeline 6 detected by the dew point detector 501 is at a normal value, the dew point controller 502 controls the dew point adjusting device 4 to stop operating.
In some embodiments, the method for correcting the dew point temperature of the gas in the circulating air pipeline 6 comprises the following steps:
the dew point controller 502 transmits the temperature differential data to a flow controller 504. The flow meter 503 measures the flow rate of air in the air delivery pipe 7 and generates flow rate data, and the flow meter 503 transmits the flow rate data to the flow controller 504. The flow controller 504 controls the opening degree of the regulating valve 505 according to the temperature difference data and the flow data, so that the dew point regulating device 4 regulates the dew point temperature of the gas in the circulating air pipeline 6 to be consistent with the preset value of the dew point controller 502.
The dew point controller 502 controls the dew point adjusting device 4 to be opened and adjusts the operating power of the dew point adjusting device 4 according to the temperature difference data, and the flow controller 504 controls the opening degree of the adjusting valve 505 according to the temperature difference data and the flow data, so that the system can operate stably and efficiently.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used 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 the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A controllable crushing system of circulated air dew point which characterized in that includes:
a crushing device for crushing and processing the solid raw material;
the crushing device is connected with the filtering device through a pipeline, and the filtering device is used for receiving and filtering crushed solid raw materials;
the air supply device is connected with the crushing device through a pipeline, the air supply device is used for supplying air to the crushing device, the filtering device is connected with the air supply device through a pipeline, the air supply device is also used for receiving gas output by the filtering device, and a pipeline between the filtering device and the air supply device is a circulating air pipeline;
the dew point adjusting device is connected with the circulating air pipeline and is used for adjusting the dew point temperature of the gas in the circulating air pipeline;
the detection control device is connected with the circulating air pipeline and the dew point adjusting device and used for detecting the dew point temperature of the gas in the circulating air pipeline and generating temperature data, and the detection control device controls the dew point adjusting device to correct the dew point temperature of the gas in the circulating air pipeline by comparing and analyzing deviation values between the temperature data and preset values of the detection control device.
2. The pulverization system with controllable circulating air dew point according to claim 1, wherein the dew point adjusting device is connected with the circulating air pipeline through a pipeline, the pipeline between the dew point adjusting device and the circulating air pipeline is an air conveying pipeline, and the dew point adjusting device adjusts the dew point temperature of the gas in the circulating air pipeline by conveying the air in the external environment into the circulating air pipeline through the air conveying pipeline.
3. The circulating air dew point controllable pulverizing system of claim 2, wherein the detection control means comprises:
the dew point detector is arranged in the circulating air pipeline and is used for detecting the dew point temperature of the gas in the circulating air pipeline and generating temperature data;
the dew point controller is connected with the dew point detector to receive the temperature data, and generates temperature difference data by comparing and analyzing deviation values between the temperature data and preset values of the dew point controller;
the flowmeter is arranged in the air conveying pipeline and is used for measuring the flow of air in the air conveying pipeline and generating flow data;
the flow controller is connected with the dew point controller and the flowmeter to receive the temperature difference data and the flow data;
the flow controller is used for controlling the opening degree of the adjusting valve according to the temperature difference data and the flow data.
4. The circulating air controlled dew point pulverizing system of claim 3, wherein the dew point controller is connected to the dew point adjusting device, and the dew point controller is used for controlling the start and stop of the dew point adjusting device according to the temperature difference data.
5. The circulating air dew point controllable pulverizing system of claim 1, wherein the dew point adjusting device is an air dilution fan.
6. The circulating air dew point controllable pulverizing system of claim 1, further comprising a circulating fan, wherein the circulating fan is arranged on the circulating air pipeline.
7. The circulating air dew point controllable pulverizing system of claim 1, wherein the pulverizing device is a coal mill, the filtering device is a pulverized coal filter, and the air supply device is a hot blast stove.
8. A dew point control method for a circulating air dew point controllable pulverizing system according to any one of claims 1 to 7, the method comprising:
the detection control device detects the dew point temperature of the gas in the circulating air pipeline and generates temperature data;
the detection control device contrasts and analyzes a deviation value between the temperature data and a preset value of the detection control device;
the detection control device controls the dew point adjusting device to be opened and closed according to the deviation value;
and when the dew point adjusting device is opened, the dew point adjusting device corrects the dew point temperature of the gas in the circulating air pipeline.
9. Dew point control method according to claim 8, characterised in that the control method of the dew point adjusting means comprises:
the dew point detector detects the dew point temperature of the gas in the circulating air pipeline and generates temperature data, and the dew point detector transmits the temperature data to the dew point controller;
and the dew point controller compares and analyzes the deviation value between the temperature data and a preset value of the dew point controller and generates temperature difference data, and the dew point controller controls the opening and closing of the dew point adjusting device according to the temperature difference data.
10. The dew point control method of claim 9, wherein the method of correcting the dew point temperature of the gas in the circulating air duct comprises:
the dew point controller transmits the temperature difference data to a flow controller;
the flow meter measures the flow of air in the air conveying pipeline and generates flow data, and the flow meter transmits the flow data to a flow controller;
and the flow controller controls the opening of the regulating valve according to the temperature difference data and the flow data so that the dew point regulating device regulates the dew point temperature of the gas in the circulating air pipeline to be consistent with the preset value of the dew point controller.
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