CN211451003U - Powder feeding equipment - Google Patents
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- CN211451003U CN211451003U CN201922502346.2U CN201922502346U CN211451003U CN 211451003 U CN211451003 U CN 211451003U CN 201922502346 U CN201922502346 U CN 201922502346U CN 211451003 U CN211451003 U CN 211451003U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a powder feeding equipment relates to machinery, solves the limited problem of present powder feeding equipment coal type. Send powder equipment including air heater, primary air bellow inlet pipeline, primary air bellow outlet pipeline, row's powder fan, exhaust air bellow inlet pipeline, exhaust air bellow outlet pipeline, send powder pipeline, primary air regulating gate, exhaust air regulating gate and combustor subassembly that have hot primary air export, and appointed position in sending the powder pipeline is provided with first temperature measurement component, appointed position is for coming from the hot primary air of primary air bellow with come from the position that the exhaust air of exhaust air bellow all passed through. The powder feeding equipment is used for conveying pulverized coal.
Description
Technical Field
The utility model relates to the field of machinary, especially, relate to a powder feeding equipment.
Background
At present, a powder feeding system is mostly adopted to provide a coal powder mixture with qualified fineness and air-powder mixture with proper temperature for a boiler.
The current powder feeding system is generally divided into a hot air powder feeding system and an exhaust gas powder feeding system, wherein the hot air powder feeding system aims at the anthracite coal with poor coal, and the exhaust gas powder feeding system aims at the bituminous coal. The hot air powder feeding system or the exhaust gas powder feeding system can only adapt to the grinding and conveying of lean coal anthracite or bituminous coal, and can not give consideration to both, and the application range of the coal types is greatly limited.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a powder feeding device to solve the limited technical problem of powder feeding device coal type among the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
a powder feeding device comprises an air preheater with a hot primary air outlet, a primary air box inlet pipeline, a primary air box outlet pipeline, a powder discharge fan, an exhaust air box, an exhaust air box inlet pipeline, an exhaust air box outlet pipeline, a powder feeding pipeline, a primary air adjusting door, an exhaust air adjusting door and a burner assembly;
the hot primary air outlet of the air preheater is connected with the inlet of the primary air box through the primary air box inlet pipeline, the outlet of the primary air box is connected with the primary air adjusting door through the primary air box outlet pipeline, and the primary air adjusting door is also connected with the powder feeding pipeline;
the powder discharge fan is connected with an inlet of the exhaust air bellows through an inlet pipeline of the exhaust air bellows, an outlet of the exhaust air bellows is connected with the exhaust air adjusting valve through an outlet pipeline of the exhaust air bellows, and the exhaust air adjusting valve is also connected with the powder feeding pipeline;
the outlet of the powder feeding pipeline is connected to the burner assembly, a first temperature measuring element is arranged at a specified position in the powder feeding pipeline, and the specified position is a position where hot primary air from the primary air box and exhaust air from the exhaust air box both pass through.
Optionally, in one embodiment, the apparatus further comprises a second temperature measuring element disposed within the primary windbox.
Optionally, in one embodiment, the apparatus further comprises a third temperature measuring element disposed within the exhaust bellows.
Optionally, in an embodiment, the apparatus further comprises a first controller, and the first temperature measuring element, the second temperature measuring element, the third temperature measuring element, the primary air adjusting door, and the exhaust air adjusting door are respectively connected with the first controller.
Optionally, in an embodiment, the apparatus further includes an air speed measuring element disposed in the powder feeding pipeline.
Optionally, in an embodiment, the apparatus further comprises a second controller, and the wind speed measuring element, the primary air adjusting door and the exhaust air adjusting door are respectively connected with the second controller.
Optionally, in one embodiment, the apparatus further comprises a coal mill, a spent gas recirculation line, and a recirculation spent gas conditioning gate;
the coal mill is connected with the recycling exhaust gas adjusting door through the exhaust gas recycling pipeline, and the recycling exhaust gas adjusting door is also connected with the powder discharge fan;
a first gas pressure measuring element is also arranged in the primary air box;
and a second gas pressure measuring element is also arranged in the exhaust gas bellows.
Optionally, in one embodiment, the apparatus further comprises a third controller, and the recirculation off-gas regulating gate, the first gas pressure measuring element, and the second gas pressure measuring element are respectively connected to the third controller.
Optionally, in one embodiment, the first and second gas pressure measuring elements are pressure gauges.
Optionally, in an embodiment, the first temperature measuring element, the second temperature measuring element and the third temperature measuring element are temperature sensors, and the wind speed measuring element is a dual venturi anemometer.
The utility model discloses the beneficial effect who brings as follows:
the utility model discloses an assigned position in the powder feeding pipeline sets up first temperature measurement component and carries out real-time supervision to the gas temperature in the powder feeding pipeline, wherein, the assigned position is for coming from the hot primary air of primary air case with come from the position that the exhaust gas of exhaust air case all passed through to according to measuring result and the buggy kind of sending powder, the degree of opening and shutting of adjusting primary air governing door and exhaust gas governing door is adjusted in the correspondence, makes the gas temperature suit with the buggy kind of sending powder in the powder feeding pipeline. Due to the arrangement, the proportion of the hot primary air and the exhaust air in the powder feeding pipeline can be controlled, the switching of full hot air, full exhaust air or a mixture of the exhaust air and the hot air for the powder feeding medium is realized, and then different pulverized coal types can be switched.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it.
Fig. 1 is a schematic structural view of the powder feeding device of the present invention.
Description of reference numerals:
10-dust conveying equipment, 1001-air preheater, 1002-primary windbox, 1003-dust exhaust fan, 1004-exhaust windbox, 1005-primary air regulating gate, 1006-exhaust air regulating gate, 1007-burner assembly, 1008-first temperature measuring element, 1009-second temperature measuring element, 1010-third temperature measuring element, 1011-wind speed measuring element, 1012-coal mill, 1013-recirculation exhaust air regulating gate, 1014-first gas pressure measuring element, 1015-second gas pressure measuring element, 1016-primary fan, 1017-blower, 1018-coal bunker, 1019-coal feeder, 1020-coarse powder separator, 1021-fine powder separator, 1022-coal bunker, 1023-air powder mixer, 1024-boiler, i-primary windbox inlet line, i-o-primary windbox outlet line, ii-i-exhaust air windbox inlet line, ii-o-exhaust air outlet line, III-powder feeding pipeline and IV-exhaust gas recycling pipeline.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to realize flexible control and adjustment of the temperature of the powder feeding air, thereby safely and economically using hot air and exhaust gas to carry out pulverized coal conveying and finally expanding the application range of the coal type of the powder feeding equipment, the application provides the powder feeding equipment 10 which comprises an air preheater 1001 with a hot primary air outlet, a primary air bellow 1002, a primary air bellow inlet pipeline I-i, a primary air bellow outlet pipeline I-o, a powder discharging fan 1003, an exhaust air bellow 1004, an exhaust air bellow inlet pipeline II-i, an exhaust air bellow outlet pipeline II-o, a powder feeding pipeline III, a primary air adjusting door 1005, an exhaust air adjusting door 1006 and a burner assembly 1007 as shown in figure 1; the hot primary air outlet of the air preheater 1001 is connected with the inlet of a primary air bellow 1002 through a primary air bellow inlet pipeline I-i, the outlet of the primary air bellow 1002 is connected with a primary air adjusting door 1005 through a primary air bellow outlet pipeline I-o, and the primary air adjusting door 1005 is also connected with a powder feeding pipeline III; the powder discharge fan 1003 is connected with an inlet of a waste gas air bellow 1004 through a waste gas air bellow inlet pipeline II-i, an outlet of the waste gas air bellow 1004 is connected with a waste gas adjusting valve 1006 through a waste gas air bellow outlet pipeline II-o, and the waste gas adjusting valve 1006 is also connected with a powder feeding pipeline III; the outlet of the powder feeding pipe III is connected to a burner assembly 1007, and a first temperature measuring element 1008 is arranged at a specified position in the powder feeding pipe III, wherein the specified position is a position where hot primary air from the primary air box 1002 and exhaust air from the exhaust air box 1004 both pass through.
By providing the first temperature measuring element 1008 at a designated position in the powder feeding pipe iii, where the hot primary air from the primary air box 1002 and the exhaust air from the exhaust air box 1004 both pass through, the temperature of the gas in the powder feeding pipe iii, for example, the temperature of the mixed gas composed of the hot primary air and the exhaust air, can be measured, and the primary air adjusting gate 1005 and the exhaust air adjusting gate 1006 are adjusted correspondingly according to the temperature detected by the first temperature measuring element 1008, so that the temperature of the gas in the powder feeding pipe iii is adapted to the type of pulverized coal to be fed. For example, the current equipment needs to convey pulverized coal a, the required air supply temperature of the pulverized coal a is 200 ℃, the temperature of the hot primary air in the primary air box 1002 is generally higher, about 300 ℃, the exhaust air temperature in the exhaust air box 1004 is lower, about 80 ℃, if the temperature measured by the first temperature measuring element 1008 in the powder conveying pipeline iii is 150 ℃, it is indicated that the air temperature in the powder conveying pipeline iii needs to be increased, the air supply amount of the hot primary air needs to be increased, that is, the opening degree of the primary air adjusting door 1005 needs to be increased, so as to increase the air supply amount of the hot primary air, and further increase the temperature of the mixed gas in the powder conveying pipeline iii to reach about 200 ℃ and match with the pulverized coal a. For another example, the current equipment needs to convey the pulverized coal B, the air supply temperature needed by the pulverized coal B is 80 ℃, the temperature measured by the first temperature measuring element 1008 in the powder conveying pipeline iii is 150 ℃, which indicates that the temperature of the gas in the powder conveying pipeline iii needs to be reduced, and the temperature of the exhaust gas in the exhaust gas air box 1004 is about 80 ℃, so that the primary air adjusting door 1005 can be controlled to be closed, only the exhaust gas adjusting door 1006 is opened, only the exhaust gas air supply is provided, and the temperature of the gas in the powder conveying pipeline iii can be matched with that of the pulverized coal B. For example, the temperature of the air supply required by the coal powder C is 300 ℃ when the current equipment needs to convey the coal powder C, the temperature measured by the first temperature measuring element 1008 in the coal powder conveying pipeline iii is 150 ℃, which indicates that the temperature of the gas in the coal powder conveying pipeline iii needs to be increased, and the temperature of the primary hot air in the primary air box 1002 is about 300 ℃, so that the exhaust air adjusting door 1006 can be controlled to be closed, only the primary air adjusting door 1005 is opened, the primary hot air supply is provided, and the temperature of the gas in the coal powder conveying pipeline iii can be matched with the coal powder C.
The method comprises the steps that a first temperature measuring element is arranged at an appointed position in a powder feeding pipeline to monitor the gas temperature in the powder feeding pipeline in real time, wherein the appointed position is a position where hot primary air from a primary air box and exhaust air from an exhaust air box all pass through, and the opening and closing degree of a primary air adjusting door and an exhaust air adjusting door is correspondingly adjusted according to a measuring result and the type of pulverized coal for feeding, so that the gas temperature in the powder feeding pipeline is adaptive to the type of pulverized coal for feeding. Due to the arrangement, the proportion of the hot primary air and the exhaust air in the powder feeding pipeline can be controlled, the switching of full hot air, full exhaust air or a mixture of the exhaust air and the hot air for the powder feeding medium is realized, and then different pulverized coal types can be switched.
In practical application, when the opening and closing degree of the primary air adjusting door and the exhaust air adjusting door is adjusted correspondingly according to the monitoring result of the first temperature measuring element arranged in the powder feeding pipeline and the type of pulverized coal fed with powder, the adjustment of the primary air adjusting door and the exhaust air adjusting door can be manually carried out, but in order to realize more accurate control, the opening and closing degree of the primary air adjusting door and the exhaust air adjusting door can be controlled by the aid of the controller, for example, the primary air adjusting door, the exhaust air adjusting door, the first temperature measuring element and the controller are respectively connected, and the controller can correspondingly control the opening and closing degree of the primary air adjusting door and the exhaust air adjusting door according to the temperature measured by the first temperature measuring element.
In order to further realize the rapid and accurate control of the opening and closing degree of the primary air adjusting door 1005 and the exhaust air adjusting door 1006, so that the gas temperature in the powder feeding pipeline iii can rapidly reach the temperature matched with the type of the pulverized coal, the powder feeding device 10 of the present application further comprises a second temperature measuring element 1009, and the second temperature measuring element 1009 is arranged in the primary air box 1002; and a third temperature measuring element 1010, and the third temperature measuring element 1010 is disposed within the exhaust bellows 1004.
Generally, the temperature of the hot primary air in the primary air box 1002 is not exactly at a certain fixed temperature, and the exhaust air in the exhaust air box 1004 is also not exactly at a certain fixed temperature, so that the gas temperature in the powder feeding pipe iii can be measured by providing the second temperature measuring element 1009, the third temperature measuring element 1010 and the first temperature measuring element 1008 in the exhaust air box 1004 in the primary air box 1002, and the temperatures of the hot primary air in the primary air box 1002 and the exhaust air in the exhaust air box 1004 can be accurately measured, and the opening and closing degrees of the primary air adjusting door 1005 and the exhaust air adjusting door 1006 can be further accurately and rapidly controlled according to the accurate temperatures of the hot primary air and the exhaust air, so that the gas temperature in the powder feeding pipe iii can rapidly reach a temperature matched with the type of pulverized coal.
The first temperature measuring element 1008 is used for detecting the temperature of the gas in the powder feeding pipeline iii, the second temperature measuring element 1009 is used for detecting the temperature of the hot primary air in the primary air box 1002, and the third temperature measuring element 1010 is used for detecting the temperature of the exhaust gas in the exhaust air box 1004. For example, the temperature measuring element may include a temperature sensor located inside the wind box or the powder feeding pipe to measure the temperature of the gas more accurately, and a temperature display portion provided outside the wind box or the powder feeding pipe to display the gas temperature.
In practical applications, when the opening and closing degrees of the primary air adjusting door and the exhaust air adjusting door are adjusted correspondingly according to the temperature detection results of the first temperature measuring element, the second temperature measuring element and the third temperature measuring element and the types of pulverized coal fed by the pulverized coal, the adjustment of the primary air adjusting door and the exhaust air adjusting door can be performed manually, but for more precise control, the opening and closing degrees of the primary air adjusting door and the exhaust air adjusting door can be controlled by means of a controller.
By connecting the first temperature measuring element 1008, the second temperature measuring element 1009, the third temperature measuring element 1010, the primary air adjusting door 1005 and the exhaust air adjusting door 1006 with the first controller, the controller can precisely control the opening and closing degree of the primary air adjusting door 1005 and the exhaust air adjusting door 1006 according to the temperatures measured by the first temperature measuring element 1008, the second temperature measuring element 1009 and the third temperature measuring element 1010. The setting position of the first controller is not particularly limited as long as the above connection and control can be realized.
In actual circumstances, not only air at a temperature suitable for the kind of pulverized coal but also an appropriate air volume is supplied at the time of feeding the pulverized coal.
Therefore, in one embodiment, the powder feeding apparatus 10 further comprises an air speed measuring element 1011, and the air speed measuring element 1011 is disposed in the powder feeding pipeline iii, as shown in fig. 1. The detection result of the wind speed measuring element 1011 reflects the magnitude of the wind volume in the powder feeding pipeline iii, and since the diameter of the powder feeding pipeline is constant, generally, the larger the measured wind speed value is, the larger the wind volume in the powder feeding pipeline iii is, and the smaller the measured wind speed value is, the smaller the wind volume in the powder feeding pipeline iii is. The opening and closing degree of the primary air adjustment door 1005 and the exhaust air adjustment door 1006 can be controlled according to the result measured by the wind speed measuring device 1011 to provide a suitable amount of wind. For example, if the wind speed value measured by the wind speed measuring element 1011 is small but a large amount of wind is currently required, the opening degree of the primary air adjustment door 1005 and the opening degree of the exhaust air adjustment door 1006 can be increased synchronously. In practical applications, the wind speed measuring element 1011 can be a dual venturi tube, a backrest tube, a flute tube, etc., which is not limited herein.
When according to the testing result of wind speed measuring element 1011, correspond when adjusting the degree of opening and shutting of primary air adjusting door 1005 and exhaust gas adjusting door 1006, can adjust by the manual work, but in order can more accurate control, can adjust the degree of opening and shutting of door 1005 and exhaust gas adjusting door 1006 with the help of controller control primary air, in an embodiment, the powder feeding equipment 10 that this application provided still includes the second controller, wind speed measuring element 1011, primary air adjusting door 1005 and exhaust gas adjusting door 1006 respectively with the second controller is connected.
By respectively connecting the wind speed measuring element 1011, the primary air adjusting door 1005 and the exhaust air adjusting door 1006 with the second controller, the second controller can accurately and rapidly control the opening and closing degree of the primary air adjusting door 1005 and the exhaust air adjusting door 1006 according to the wind volume measured by the wind speed measuring device 1011. The setting position of the second controller is not particularly limited as long as the above connection and control can be realized.
In practical applications, the first controller and the second controller may be independent from each other, and respectively control the opening and closing degree of the primary air adjustment door 1005 and the exhaust air adjustment door 1006 according to the detection result of the measuring elements connected to the first controller and the second controller. For example, the first controller first adjusts the opening and closing degree of the primary air adjustment door 1005 and the exhaust air adjustment door 1006 according to the detection result of each temperature measurement element, so as to first control the gas temperature in the powder feeding pipeline iii to the target temperature, that is, first perform temperature control. Then, the air volume control is performed again, and the second controller controls the opening and closing degree of the primary air adjusting door 1005 and the exhaust air adjusting door 1006 according to the result detected by the air velocity measuring device 1011, so as to control the air volume in the powder feeding pipeline iii to the target air volume. Or on the contrary, the air volume is controlled by the second controller firstly, and then the temperature is controlled by the first controller. In practical applications, the first controller and the second controller may be integrated, for example, integrated into a third controller, and the third controller controls the opening and closing degree of the primary air adjusting door 1005 and the ventilation air adjusting door 1006 according to the detected result of each temperature and wind speed measuring element. For example, when the air supply with higher temperature and larger air volume is currently required, the third controller may control the opening degrees of the primary air adjustment door 1005 and the exhaust air adjustment door 1006 to be increased, and at the same time, the opening degree of the primary air adjustment door 1005 is larger, which is equivalent to synchronously increasing the opening degrees of the primary air adjustment door 1005 and the exhaust air adjustment door 1006, and on this basis, further increasing the opening degree of the primary air adjustment door 1005. This corresponds to increasing the air volume (performing air volume control) and then increasing the temperature (performing temperature control). In practical applications, the third controller may control the opening and closing degrees of the primary air adjustment door 1005 and the exhaust air adjustment door 1006 according to the results detected by the first temperature measurement element 1008, the second temperature measurement element 1009, the third temperature measurement element 1010 and the wind speed measurement device 1011 and the specific air supply requirement, which is not described herein again.
Through the setting of above-mentioned first temperature measurement element 1008, second temperature measurement element 1009, third temperature measurement element 1010 and wind speed measuring element 1011 for can control the proportion of hot primary air and exhaust gas in the powder feeding pipeline III, realize that the air supply is the switching of full hot-blast, full exhaust gas or exhaust gas and hot primary air mixture, and then to different buggy kinds, the equipment of this application can provide the air supply rather than the adapted temperature, has improved the coal type that is suitable for of powder feeding equipment.
To prevent the off-gas in the off-gas bellows 1004 from flowing back into the primary bellows 1002 along the powder feed line III and the primary bellows outlet line I-o due to excessive pressure, the temperature of the hot primary air in the primary bellows 1002 is affected, and the operation of the powder feeding apparatus 10 is affected. Therefore, the powder feeding device 10 further comprises a coal mill 1012 and a waste gas recirculation pipeline IV; the coal mill 1012 is connected with a recycling exhaust gas adjusting door 1013 through an exhaust gas recycling pipeline IV, and the recycling exhaust gas adjusting door 1013 is also connected with a powder discharge fan 1003; a first gas pressure measuring element 1014 is also arranged in the primary air bellow 1002; a second gas pressure measuring element 1015 is also disposed within the exhaust bellows 1004.
The gas pressures in the primary air bellow 1002 and the waste air bellow 1004 can be respectively detected by the first gas pressure measuring element 1014 and the second gas pressure measuring element 1015, and the opening and closing degree of the recycling waste gas adjusting door 1013 can be controlled according to the gas pressure detection result, so that the gas pressures in the primary air bellow 1002 and the waste air bellow 1004 are equal, and further, the waste gas is prevented from flowing backwards into the primary air bellow 1002, and the powder feeding device 10 is enabled to normally operate. For example, when the pressure of the gas in the exhaust bellows 1004 is greater than the pressure of the gas in the primary bellows 1002, the opening of the recirculation exhaust damper 1013 may be increased such that more of the exhaust gas discharged by the pulverizer 1003 passes through the exhaust gas recirculation line IV to the coal pulverizer 1012 and less of the exhaust gas passes through the exhaust bellows inlet line II-i to the exhaust bellows 1004, thereby reducing the pressure of the gas in the exhaust bellows 1004. Conversely, when the pressure of the gas in the exhaust gas bellows 1004 is less than the pressure of the gas in the primary bellows 1002, the opening of the recirculation exhaust gas damper 1013 may be decreased so that less of the exhaust gas exhausted by the dust exhaust fan 1003 enters the coal mill 1012 through the exhaust gas recirculation line iv, and more of the exhaust gas enters the exhaust gas bellows 1004 through the exhaust gas bellows inlet lines ii-i, thereby increasing the pressure of the gas in the exhaust gas bellows 1004 so that the pressure of the gas in the exhaust gas bellows 1004 is equal to that in the primary bellows 1002, and ensuring that the dust feeding apparatus 10 operates normally. In practical applications, the first gas pressure measuring element 1014 and the second gas pressure measuring element 1015 may be pressure gauges, which are not specifically limited as long as the gas pressures in the primary bellows 1002 and the waste gas bellows 1004 can be measured.
When the opening and closing degree of the recycling exhaust gas adjusting door 1013 is controlled according to the detection results of the first gas pressure measuring element 1014 and the second gas pressure measuring element 1015, the adjustment can be performed manually, but the adjustment can be performed by a controller for more precise control, in one embodiment, the powder feeding device 10 further comprises a third controller, and the recycling exhaust gas adjusting door 1013, the first gas pressure measuring element 1014 and the second gas pressure measuring element 1015 are respectively connected with the third controller.
By connecting the recirculation off-gas regulation door 1013, the first gas pressure measuring element 1014, and the second gas pressure measuring element 1015 to the third controller, respectively, the second controller can precisely and rapidly control the degree of opening and closing of the recirculation off-gas regulation door 1013 according to the gas pressures in the primary bellows 1002 and the off-gas bellows 1004 detected by the first gas pressure measuring element 1014 and the second gas pressure measuring element 1015. The setting position of the first controller is not particularly limited as long as the above connection and control can be realized.
For normal operation of the powder feeding apparatus 10, the powder feeding apparatus 10 generally further includes a primary air blower 1016, an air blower 1017, a coal bunker 1018, a coal feeder 1019, a coarse powder separator 1020, a fine powder separator 1021, a powder bunker 1022, an air-powder mixer 1023, and a boiler 1024. The connection mode of each element in the powder feeding device 10 is as follows: the air preheater 1001 further has a hot secondary air outlet, the hot secondary air outlet is respectively connected with an inlet of a coal mill 1012 and a burner assembly 1007, the coal bunker 1018 is connected with a coal feeder 1019, an outlet of the coal feeder 1019 is connected with an inlet of the coal mill 1012, an outlet of the coal mill 1012 is connected with an inlet of a coarse powder separator 1020, an outlet of the coarse powder separator 1020 is respectively connected with an inlet of the coal mill 1012 and an inlet of a fine powder separator 1021, an outlet of the fine powder separator 1021 is respectively connected with a powder discharge fan 1003 and a powder bunker 1022, an air powder mixer 1023 is arranged in the powder conveying pipeline III, and an outlet of the powder bunker 1022 is connected with the air powder mixer 1023.
Wherein, a part of hot secondary air from the air preheater 1001 is led to a burner assembly 1007, the other part is led to a coal mill 1012, a coal bunker 1018 is used for supplying coal for a coal feeder 1019, coarse powder separated from the coarse powder separator 1020 is further led to the coal mill 1012 for grinding, fine powder separated is led to a fine powder separator 1021, the hot secondary air led to the coal mill 1012 becomes exhaust gas and flows to a powder exhaust fan 1003 through the fine powder separator 1021, the exhaust fan 1003 exhausts the exhaust gas to a ventilation air bellow 1004 and the coal mill 1012 through a ventilation air bellow inlet pipeline II-i and a ventilation air recirculation pipeline IV respectively, coal powder separated by the fine powder separator 1021 enters a powder bunker 1022, and in an air powder mixer 1023 in a powder feeding pipeline III, the coal powder is mixed with gas in a powder feeding pipeline III and is fed into a boiler 1024 through the burner assembly 1007 for burning.
The application provides an above-mentioned powder feeding equipment, through first temperature measurement component, second temperature measurement component, third temperature measurement component and air velocity measurement component's setting, can control the proportion of hot primary air and exhaust gas in the powder feeding pipeline, realize that the air supply is full hot-blast, the switching of full exhaust gas or exhaust gas and hot primary air mixture, and then to different buggy kinds, the powder feeding equipment of this application can provide the air supply rather than the adaptive temperature, the coal type that the suitable of powder feeding equipment has been improved. And, through the setting of above-mentioned first gas pressure measurement component, second gas pressure measurement component and recirculation exhaust air regulating valve, can make the gas pressure in primary bellows and the exhaust air bellows equal, and then prevent that the exhaust air from flowing backward and getting into primary bellows in to guarantee the normal high-efficient operation of powder feeding equipment.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A powder feeding device is characterized by comprising an air preheater with a hot primary air outlet, a primary air box inlet pipeline, a primary air box outlet pipeline, a powder discharging fan, an exhaust air box, an exhaust air box inlet pipeline, an exhaust air box outlet pipeline, a powder feeding pipeline, a primary air adjusting door, an exhaust air adjusting door and a burner assembly;
the hot primary air outlet of the air preheater is connected with the inlet of the primary air box through the primary air box inlet pipeline, the outlet of the primary air box is connected with the primary air adjusting door through the primary air box outlet pipeline, and the primary air adjusting door is also connected with the powder feeding pipeline;
the powder discharge fan is connected with an inlet of the exhaust air bellows through an inlet pipeline of the exhaust air bellows, an outlet of the exhaust air bellows is connected with the exhaust air adjusting valve through an outlet pipeline of the exhaust air bellows, and the exhaust air adjusting valve is also connected with the powder feeding pipeline;
the outlet of the powder feeding pipeline is connected to the burner assembly, a first temperature measuring element is arranged at a specified position in the powder feeding pipeline, and the specified position is a position where hot primary air from the primary air box and exhaust air from the exhaust air box both pass through.
2. The powder feeding apparatus according to claim 1, further comprising a second temperature measuring element provided in the primary air box.
3. The powder feeding apparatus of claim 2, further comprising a third temperature measuring element disposed within the exhaust air bellows.
4. The powder feeding apparatus according to claim 3, further comprising a first controller, wherein the first temperature measuring element, the second temperature measuring element, the third temperature measuring element, the primary air adjusting door, and the waste air adjusting door are respectively connected to the first controller.
5. The powder feeding apparatus according to claim 4, further comprising an air velocity measuring element disposed within the powder feeding pipeline.
6. The powder feeding apparatus according to claim 5, further comprising a second controller, wherein the wind speed measuring element, the primary air adjusting door and the waste air adjusting door are connected to the second controller, respectively.
7. The powder feeding apparatus of claim 6, further comprising a coal mill, a spent gas recirculation line, and a recirculation spent gas adjustment gate;
the coal mill is connected with the recycling exhaust gas adjusting door through the exhaust gas recycling pipeline, and the recycling exhaust gas adjusting door is also connected with the powder discharge fan;
a first gas pressure measuring element is also arranged in the primary air box;
and a second gas pressure measuring element is also arranged in the exhaust gas bellows.
8. The powder feeding apparatus according to claim 7, further comprising a third controller to which the recirculation off-gas adjustment gate, the first gas pressure measuring element, and the second gas pressure measuring element are connected, respectively.
9. The powder feeding apparatus according to claim 8, wherein the first gas pressure measuring element and the second gas pressure measuring element are pressure gauges.
10. The powder feeding apparatus of claim 5, wherein the first temperature measuring element, the second temperature measuring element, and the third temperature measuring element are temperature sensors, and the wind speed measuring element is a dual venturi anemometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922502346.2U CN211451003U (en) | 2019-12-31 | 2019-12-31 | Powder feeding equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922502346.2U CN211451003U (en) | 2019-12-31 | 2019-12-31 | Powder feeding equipment |
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| CN211451003U true CN211451003U (en) | 2020-09-08 |
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