CN219602704U - Limestone powder feeding system - Google Patents
Limestone powder feeding system Download PDFInfo
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- CN219602704U CN219602704U CN202320538408.9U CN202320538408U CN219602704U CN 219602704 U CN219602704 U CN 219602704U CN 202320538408 U CN202320538408 U CN 202320538408U CN 219602704 U CN219602704 U CN 219602704U
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- limestone powder
- limestone
- feeding system
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
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Abstract
The utility model provides a limestone powder feeding system, and belongs to the technical field of limestone conveying. The limestone powder feeding system comprises: the powder bin is used for storing limestone powder, and the bottom end of the powder bin is provided with a powder outlet; the air supply assembly comprises a main pipe, a plurality of branch pipes and an air source, wherein the main pipe is arranged around the periphery of the bottom of the powder bin, the branch pipes are respectively communicated with the main pipe and the powder bin, the air source is connected with the main pipe and used for supplying nitrogen into the main pipe, and the nitrogen can respectively enter the powder bin through the main pipe and the plurality of branch pipes; the blanking machine is arranged below the powder bin and comprises a machine body and a plurality of hoppers arranged around the machine body, and the hoppers on the machine body can be sequentially opposite to the powder outlet to receive limestone powder sent out by the powder outlet of the powder bin when the machine body rotates. The air supply assembly and the blanking machine in the limestone powder feeding system can ensure that limestone powder in the powder bin can be continuously and stably output.
Description
Technical Field
The utility model belongs to the technical field of limestone conveying, and particularly relates to a limestone powder feeding system.
Background
In the production process of pulverized coal gasification, according to the difference of different coal types and ash fusion points, a certain amount of limestone powder is needed to be added in proportion in the preparation of pulverized coal, and the main purpose is to reduce the ash fusion point of the coal, thereby reducing the operating temperature of the gasification furnace and ensuring that the gasification furnace has a relatively loose operating temperature range. It is important that limestone powder is stably and accurately added into raw coal according to a certain proportion, and excessive high or low proportion of limestone powder can easily cause the problems of abnormal slag removal of gasification furnace, blockage of a slag removal system and the like. To ensure stable addition of limestone powder, a limestone powder feeding system that operates stably, reliably and accurately is necessary.
The traditional limestone powder feeding system mostly comprises a limestone powder weighing and metering middle tank and a screw conveyor arranged at the bottom of the limestone powder weighing and metering middle tank, and the feeding amount of the limestone powder is realized by controlling the rotating speed of the screw conveyor through a weight reduction method of the weighing middle tank. However, the characteristics of the limestone, such as granularity, humidity and the like, are very easy to be changed along with environmental factors, are adhered to form blocks to be accumulated in the metering intermediate tank, and the limestone is very easy to cause equipment jam and jump stop when entering the screw conveyor from the metering intermediate tank, so that the limestone powder conveying amount cannot be ensured to be uniform and continuous.
Disclosure of Invention
In view of the foregoing problems of the prior art, an object of an embodiment of the present utility model is to provide a limestone powder feeding system capable of achieving continuous feeding.
The technical scheme adopted by the embodiment of the utility model is as follows:
a limestone powder feeding system, the limestone powder feeding system comprising:
the powder bin is used for storing limestone powder, and the bottom end of the powder bin is provided with a powder outlet;
the air supply assembly comprises a main pipe, a plurality of branch pipes and an air source, wherein the main pipe is arranged around the periphery of the bottom of the powder bin, the branch pipes are respectively communicated with the main pipe and the powder bin, the air source is connected with the main pipe and used for supplying nitrogen into the main pipe, and the nitrogen can respectively enter the powder bin through the main pipe and the branch pipes;
the blanking machine is arranged below the powder bin and comprises a machine body and a plurality of hoppers arranged around the machine body, and the hoppers on the machine body can be sequentially opposite to the powder outlet to receive limestone powder sent out by the powder outlet of the powder bin when the machine body rotates.
Further, the limestone powder feeding system further comprises:
the first material conveying piece is arranged below the blanking machine and is used for receiving and conveying limestone powder poured out of the blanking machine;
the second material conveying piece is arranged opposite to or parallel to the first material conveying piece and is used for receiving and conveying raw coal materials;
and the material mixing bin is respectively connected with the first material conveying part and the second material conveying part so as to receive and mix limestone powder conveyed by the first material conveying part and raw coal conveyed by the second material conveying part.
Further, the first material conveying piece and the second material conveying piece are belt scales.
Further, the material mixing bin is positioned below the discharging ends of the two material conveying pieces and at least comprises a first feeding hole and a second feeding hole; the limestone powder feeding system further comprises a first blanking pipe connected with the first feeding port and the discharging end of the first material conveying piece and a second blanking pipe connected with the second feeding port and the discharging end of the second material conveying piece.
Further, the first blanking pipe and the second blanking pipe respectively comprise a plurality of rigid pipe sections which are arranged at intervals along the length direction of the first blanking pipe and the second blanking pipe, and two adjacent rigid pipe sections are connected and communicated through flexible corrugated pipe sections.
Further, the blanking machine further comprises a blanking motor for driving the machine body to rotate; the limestone powder feeding system further comprises a controller which is electrically connected with the discharging motor, the first material conveying piece and the second material conveying piece respectively.
Further, the top of the powder bin is connected with a blow-down filter, and the blow-down filter is used for filtering dust discharged from the top of the powder bin.
Further, the blanking machine is connected with the powder outlet of the powder bin through a flange.
Compared with the prior art, the embodiment of the utility model has the beneficial effects that:
according to the limestone powder feeding system provided by the utility model, nitrogen can be sprayed into the powder bin through the air supply assembly to loosen limestone powder easily accumulated at the bottom in the powder bin so as to ensure that the powder bin can continuously discharge, and limestone powder received in the hopper can be uniformly sprayed out through rotation of the machine body of the discharging machine at the bottom of the powder bin, so that the limestone powder in the powder bin can be continuously and stably output.
Drawings
FIG. 1 is a schematic diagram of a limestone powder feed system according to an embodiment of the utility model;
FIG. 2 is a schematic diagram of a connection structure between an air supply assembly and a powder bin according to an embodiment of the present utility model;
FIG. 3 is a schematic structural diagram of a blanking machine according to an embodiment of the present utility model;
fig. 4 is a schematic structural view of a blanking pipe according to an embodiment of the present utility model.
In the figure: 1-a powder bin; 2-an air supply assembly; 20-a main pipe; 21-branch pipes; 3-blanking machine; 30-organism; 31-a hopper; 32-blanking motor; 4-a first material transfer element; 5-a second material transfer element; 6, a material mixing bin; 7-a first blanking pipe; 8-a second blanking pipe; 9-corrugated pipe sections; 10-rigid pipe sections; 11-venting the filter.
Detailed Description
Technical or scientific terms used herein should be given the ordinary meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The embodiment of the utility model provides a limestone powder feeding system. As shown in fig. 1, the limestone powder feeding system mainly comprises a powder bin 1, an air supply assembly 2 and a blanking machine 3.
The top of the powder bin 1 of the embodiment is provided with a powder inlet, the bottom of the powder bin 1 is provided with a powder outlet, and the powder bin 1 is used for storing limestone powder.
As shown in fig. 2, the air supply assembly 2 includes a main pipe 20 provided around the outer periphery of the bottom of the powder hopper 1, a plurality of branch pipes 21 respectively communicating the main pipe 20 and the powder hopper 1, and an air source (not shown) connected to the main pipe 20 for supplying nitrogen into the main pipe 20.
After the nitrogen gas produced by the gas source enters the main pipe 20, the nitrogen gas can enter the bottom of the powder bin 1 through the plurality of branch pipes 21 respectively to loosen limestone powder accumulated at the bottom in the powder bin 1, so that the limestone powder at the bottom can be continuously and stably discharged from the powder outlet.
The blanking machine 3 is arranged below the powder bin 1. The blanking machine 3 comprises a machine body 30 and a plurality of hoppers 31 arranged around the machine body 30, wherein the hoppers 31 on the machine body 30 can be sequentially opposite to the powder outlet to receive limestone powder sent out by the powder outlet of the powder bin 1 when the machine body 30 rotates, and the received limestone powder can be uniformly sprinkled out.
The limestone powder feeding system provided by the embodiment is provided with the air supply assembly 2 and the blanking machine 3, so that limestone powder in the powder bin 1 can be continuously and stably output.
The plurality of branch pipes 21 in the air supply assembly 2 of this embodiment also surrounds the periphery of the bottom of the powder bin 1, and the plurality of branch pipes 21 may be respectively located above or below the main pipe 20, or may be partially located above the main pipe 20, and partially located below the main pipe 20, so as to ensure that nitrogen can enter the powder bin 1 from the periphery of the bottom thereof. The nitrogen entering the powder bin 1 is finally discharged through the top of the powder bin 1.
As shown in fig. 3, the blanking machine 3 of the present embodiment is a rotary blanking machine, and mainly includes a machine body 30 and a plurality of hoppers 31 disposed on the machine body 30, wherein the plurality of hoppers 31 are uniformly disposed around the machine body 30, and each hopper 31 thereon can be made to face the powder outlet of the powder bin 1 by rotating the machine body 30 so as to receive limestone powder discharged from the powder bin 1. When the hopper 31 receiving limestone powder is rotated downward, the limestone powder can be spilled.
The blanking machine 3 further comprises a blanking motor 32 connected with the machine body 30, and the machine body 30 can be controlled to rotate through the blanking motor 32. Preferably, the blanking motor 32 is a variable frequency motor, and the rotating speed of the blanking motor 32 can be adjusted through the frequency converter, so that the blanking machine 3 can accurately and effectively blanking.
The blanking machine 3 of this embodiment may be connected to the powder bin 1, for example, a flange plate is disposed on the peripheral wall of the bottom of the powder bin 1, a flange hole is disposed on the flange plate, a corresponding flange plate is also disposed on the machine body 30 of the blanking machine 3, and the blanking machine 3 may be connected to the bottom of the powder bin 1 through a flange structure.
As shown in fig. 1, the top end of the blanking machine 3 of the embodiment is further connected with a emptying filter 11, dust can be raised when limestone powder is poured into the powder bin 1, and the air supply assembly 2 can also generate dust when air is supplied into the powder bin 1, and the emptying filter 11 can filter and discharge the dust in the air in the powder bin 1, so that environmental pollution is avoided.
The structure of the emptying filter 11 belongs to the prior art, and this embodiment will not be described in detail.
As shown in fig. 1, in some embodiments, the limestone feed system further comprises a first material transfer element 4, a second material transfer element 5, and a material mixing bin 6.
The first material transfer member 4 is disposed below the unloader 3 for receiving or transporting limestone powder discharged from the unloader 3. The second material conveying member 5 is arranged in parallel or opposite to the first material conveying member 4 for receiving or conveying raw material coal.
The limestone powder on the first material conveying part 4 and the raw material coal on the second material conveying part 5 are respectively conveyed into the material mixing bin 6 for mixing, and the mixed materials can be directly conveyed into a coal mill.
Preferably, the first material transporting member 4 and the second material transporting member 5 are belt scales, respectively, which are devices capable of transporting materials and continuously weighing the materials, and transporting the materials mainly through belts, and the transported materials can be of various types, such as particles, large and small pieces, and powder.
The specific material weighing principle of the belt scale belongs to the prior art, and in this embodiment, no description is given.
The limestone powder feeding system of this embodiment further includes a control system electrically connected to the discharging motor 32, the first material conveying member 4 and the second material conveying member 5, where the control system can adjust the rotation speed of the discharging machine 3 according to the weights of the materials respectively weighed by the first material conveying member 4 and the second material conveying member 5.
Specifically, the weight of the transported raw material coal detected by the second material transporting member 5 is G1, the weight of the transported limestone powder detected by the first material transporting member 4 is G2, and the control system adjusts the rotation speed of the discharging motor 32 according to the deviation between G1 and G2, so as to adjust the discharging amount of the discharging machine 3, so that the deviation between G1 and G2 reaches a preset value, and a reasonable proportioning ratio of the limestone powder and the raw material coal is realized.
The limestone powder feeding system of the embodiment can meet the requirements of different raw material coals and limestone powder proportions.
As shown in fig. 1, in some embodiments, the material mixing bin 6 is located below the first material transfer element 4 and the second material transfer element 5.
The material mixing bin 6 is provided with at least a first feed inlet and a second feed inlet, and the first feed inlet of the material mixing bin 6 is connected with the discharge end of the first material conveying member 4 through a first blanking pipe 7, so that limestone powder conveyed by the first material conveying member 4 can enter the material mixing bin 6 through the first blanking pipe 7. Correspondingly, the second feed inlet of the material mixing bin 6 is connected with the discharge end of the second material conveying part 5 through a second blanking pipe 8, and raw material coal dust conveyed by the second material conveying part 5 can enter the material mixing bin 6 through the second blanking pipe 8.
The material mixing bin 6 further comprises a discharge port which is communicated with the feed port of the coal mill, and the discharge port can be arranged below the material mixing bin 6.
When the blanking machine 3 feeds limestone powder to the first material conveying part 4, the first material conveying part 4 carries out accurate weighing and metering, and raw material coal conveyed by the second material conveying part 5 is converged in the material mixing bin 6 and then is blanked into the coal mill by gravity.
The blanking machine 3 in the limestone powder feeding system of the embodiment adopts rotary blanking, and simultaneously is matched in the blanking pipe to utilize gravity for blanking, so that abrasion in the limestone powder conveying process can be reduced to the greatest extent.
As shown in fig. 4, in this embodiment, the first blanking pipe 7 and the second blanking pipe 8 respectively include a plurality of rigid pipe sections 10 that are disposed at intervals along the length direction thereof, and two adjacent rigid pipe sections 10 are connected and communicated by a flexible bellows section 9, so as to avoid vibration of the material mixing bin 6 caused when the material transporting member transports the material.
The above description is intended to be illustrative and not limiting, and variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art within the scope of the present disclosure. Also, the above examples (or one or more aspects thereof) may be used in combination with each other, and it is contemplated that the embodiments may be combined with each other in various combinations or permutations.
Claims (8)
1. A limestone powder feeding system, characterized in that it comprises:
the powder bin is used for storing limestone powder, and the bottom end of the powder bin is provided with a powder outlet;
the air supply assembly comprises a main pipe, a plurality of branch pipes and an air source, wherein the main pipe is arranged around the periphery of the bottom of the powder bin, the branch pipes are respectively communicated with the main pipe and the powder bin, the air source is connected with the main pipe and used for supplying nitrogen into the main pipe, and the nitrogen can respectively enter the powder bin through the main pipe and the branch pipes;
the blanking machine is arranged below the powder bin and comprises a machine body and a plurality of hoppers arranged around the machine body, and the hoppers on the machine body can be sequentially opposite to the powder outlet to receive limestone powder sent out by the powder outlet of the powder bin when the machine body rotates.
2. A limestone powder feeding system according to claim 1, wherein the limestone powder feeding system further comprises:
the first material conveying piece is arranged below the blanking machine and is used for receiving and conveying limestone powder poured out of the blanking machine;
the second material conveying piece is arranged opposite to or parallel to the first material conveying piece and is used for receiving and conveying raw coal materials;
and the material mixing bin is respectively connected with the first material conveying part and the second material conveying part so as to receive and mix limestone powder conveyed by the first material conveying part and raw coal conveyed by the second material conveying part.
3. A limestone powder feeding system according to claim 2, wherein the first and second material transfer members are belt scales.
4. A limestone powder feeding system according to claim 3 wherein the material mixing bin is located below the discharge ends of the two material transfer pieces, the material mixing bin including at least a first feed port and a second feed port; the limestone powder feeding system further comprises a first blanking pipe connected with the first feeding port and the discharging end of the first material conveying piece and a second blanking pipe connected with the second feeding port and the discharging end of the second material conveying piece.
5. The limestone powder feed system of claim 4, wherein each of the first and second drop tubes includes a plurality of rigid tube segments spaced along a length thereof, adjacent ones of the rigid tube segments being connected and in communication by flexible bellows segments.
6. The limestone powder feeding system of claim 2, wherein the blanking machine further includes a blanking motor for driving the machine body to rotate; the limestone powder feeding system further comprises a controller which is electrically connected with the discharging motor, the first material conveying piece and the second material conveying piece respectively.
7. A limestone powder feeding system according to claim 1, wherein the top end of the powder bin is connected to a blow-down filter for filtering dust discharged from the top end of the powder bin.
8. The limestone powder feeding system of claim 1, wherein the blanking machine is connected to the powder outlet of the powder bin by a flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320538408.9U CN219602704U (en) | 2023-03-17 | 2023-03-17 | Limestone powder feeding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320538408.9U CN219602704U (en) | 2023-03-17 | 2023-03-17 | Limestone powder feeding system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219602704U true CN219602704U (en) | 2023-08-29 |
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ID=87743464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320538408.9U Active CN219602704U (en) | 2023-03-17 | 2023-03-17 | Limestone powder feeding system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219602704U (en) |
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2023
- 2023-03-17 CN CN202320538408.9U patent/CN219602704U/en active Active
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