CN216047817U - Pulverized coal blowing device - Google Patents
Pulverized coal blowing device Download PDFInfo
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- CN216047817U CN216047817U CN202121366362.4U CN202121366362U CN216047817U CN 216047817 U CN216047817 U CN 216047817U CN 202121366362 U CN202121366362 U CN 202121366362U CN 216047817 U CN216047817 U CN 216047817U
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Abstract
The utility model designs a pulverized coal blowing device which comprises a conveying pipeline, wherein a fan and a spray head are respectively arranged at two ends of the conveying pipeline, a feed hopper, a three-way joint, a first filtering tank and a second filtering tank are arranged above the conveying pipeline, and the outlet end of the feed hopper is communicated with a third joint of the three-way joint; the outlet end of the first filtering tank and the outlet end of the second filtering tank are both communicated with a conveying pipeline, and a first communicating switch and a second communicating switch are respectively arranged at the communication positions of the conveying pipeline and the first filtering tank and the second filtering tank; the inlet end of the first filter tank is communicated with a first joint of the three-way joint, the inlet end of the second filter tank is communicated with a second joint of the three-way joint, and a third communicating switch and a fourth communicating switch are respectively arranged on the first joint and the second joint. The utility model has the advantages that when the filter assembly is cleaned and replaced, only the corresponding filter tank can be closed, and the complete machine does not need to be stopped.
Description
Technical Field
The utility model belongs to the field of pulverized coal conveying, and particularly relates to a pulverized coal blowing device.
Background
When thermal power generation is carried out, large thermal power plants burn pulverized coal for improving coal burning efficiency. Therefore, raw coal in the coal hopper is firstly sent to a coal mill to be milled into coal powder, and the milled coal powder is carried by hot air and sent to the hearth of the boiler through a powder discharge fan to be combusted. Therefore, certain requirements are made on the particle size and the impurity content in the coal dust, and the transportation and use effects of the coal dust are greatly influenced by the oversize particles or the high impurity content in the coal dust. Most of the existing pulverized coal blowing devices directly adopt a mode of arranging a layer of filter screen in the feed hopper to filter pulverized coal, but the filter structure is inconvenient to clean and replace the filter screen and is easy to block. And after the filter screen is blocked, the whole machine needs to be stopped to clean or replace the filter screen, thereby seriously influencing the whole working efficiency.
Disclosure of Invention
The utility model aims to solve the problems that a filtering structure of a pulverized coal blowing device in the prior art is poor in filtering effect and inconvenient to clean, and provides and designs a pulverized coal blowing device, so that the whole blowing device can clean the filtering structure without stopping, and the pulverized coal filtering effect is improved.
In order to achieve the purpose, the utility model provides the following technical scheme: a pulverized coal blowing device comprises a conveying pipeline, wherein a fan is arranged at one end of the conveying pipeline, a spray head is arranged at the other end of the conveying pipeline, a feed hopper and a three-way joint are arranged above the conveying pipeline, and the outlet end of the feed hopper is communicated with a third joint of the three-way joint; a first filtering tank and a second filtering tank are further arranged above the conveying pipeline, and a first filtering component and a second filtering component are respectively arranged in the first filtering tank and the second filtering tank; the outlet end of the first filtering tank and the outlet end of the second filtering tank are both communicated with a conveying pipeline, and a first communicating switch and a second communicating switch are respectively arranged at the communication positions of the conveying pipeline and the first filtering tank and the second filtering tank; the inlet end of the first filter tank is communicated with a first joint of the three-way joint, the inlet end of the second filter tank is communicated with a second joint of the three-way joint, and a third communicating switch and a fourth communicating switch are respectively arranged on the first joint and the second joint. Therefore, under normal conditions, the pulverized coal can be filtered simultaneously through the first filter tank and the second filter tank; when a corresponding filtering component in a certain filtering tank is blocked or needs to be cleaned, the corresponding communicating switch is only required to be closed, so that the corresponding filtering tank is in a closed state, and the complete machine does not need to be stopped.
In a further improvement of the utility model, the first filter assembly comprises a filter screen which is detachably arranged at the lower part of the first filter tank; the top of filter screen is provided with the pivot, the rotatable upper portion of installing at first filter tank of pivot, fixed mounting has the stirring rake in the pivot, and the buggy that falls down from the feeder hopper like this can stir through the stirring rake, then gets into below pipeline after the rethread filter screen filters to there is great granule in the shower nozzle spun buggy has been avoided.
In a further development of the utility model, the first filter assembly and the second filter assembly are of identical construction. No matter the buggy in the feeder hopper falls into first filtration jar or falls into the second and filters the jar like this, this device all can filter the buggy.
The utility model is further improved in that an inert gas tank is arranged above the conveying pipeline, and a first gas conveying pipe and a second gas conveying pipe are communicated with the inert gas tank; the first gas pipe is communicated with the upper end of the first filtering tank, and a first control valve is arranged on the first gas pipe; the second air delivery pipe is communicated with the upper end of the second filter tank, and a second control valve is arranged on the second air delivery pipe. Therefore, the pulverized coal adsorbed on the filter screen can be blown down by inert gas in the pulverized coal blowing process and blown into the conveying pipeline.
The utility model is further improved in that the inert gas tank is also communicated with a third gas pipe, the third gas pipe is communicated with the conveying pipeline, and the third gas pipe is provided with a third control valve. Therefore, in the process of conveying the pulverized coal, the inert gas in the inert gas tank can be used for diluting the concentration of the air in the conveying pipeline, and the pulverized coal and the air are prevented from being combined to a certain degree and then spontaneous combustion is generated.
The utility model further improves the structure that the first control valve, the second control valve and the third control valve are all electromagnetic valves, so that workers can conveniently control the first control valve, the second control valve and the third control valve.
The utility model further improves the structure and the method, and further comprises a controller which is in communication connection with the first control valve, the second control valve and the third control valve, wherein the controller can independently control the opening and closing of the first control valve, the second control valve and the third control valve, so that a worker can remotely control the opening and closing of the first control valve, the second control valve and the third control valve.
The utility model is further improved in that an oxygen concentration measuring instrument is arranged in the conveying pipeline, and the oxygen concentration measuring instrument is in communication connection with the controller; the controller can receive the output signal of the oxygen concentration measuring instrument and control the switch of the third control valve according to the output signal of the oxygen concentration measuring instrument, so that the pulverized coal blowing device can automatically control the flow speed of inert gas in the third gas transmission pipe according to the oxygen concentration in the transmission pipe, and the oxygen concentration in the transmission pipe is always within a normal range.
The utility model is further improved in that a dust concentration detector is arranged in the conveying pipeline and is in communication connection with the controller; the controller can receive the output signal of dust concentration detector to the switch of first control valve and second control valve is controlled alone according to the output signal of dust concentration detector, and this buggy blows the device like this can be according to the interior buggy concentration automatic control of conveying pipe first gas-supply pipe and the second gas-supply pipe in the velocity of flow of inert gas, thereby the discharge amount of buggy on the first filter tank of control and the second filter tank, thereby guarantee that buggy concentration and oxygen concentration are in the normal range always in the conveying pipe.
The utility model further improves the structure that the first communicating switch, the second communicating switch, the third communicating switch and the fourth communicating switch are all electromagnetic valves, the controller is in communication connection with the first communicating switch, the second communicating switch, the third communicating switch and the fourth communicating switch, and the controller can independently control the switches of the first communicating switch, the second communicating switch, the third communicating switch and the fourth communicating switch, so that when the filter assembly needs to be cleaned and replaced, the corresponding circulating switch can be directly controlled to be closed through the controller, and the corresponding filter tank is in a closed state. At this time, the worker can directly perform cleaning and replacement of the filter assembly.
The pulverized coal blowing device has the advantages that the pulverized coal blowing device is provided with the two filter tanks, and each filter tank is internally provided with the group of filter assemblies, so that when the filter assemblies need to be cleaned and replaced, only the communication switch corresponding to the filter tank to be replaced or cleaned needs to be closed, and the whole pulverized coal blowing device does not need to be stopped. Thereby greatly improving the blowing efficiency of the pulverized coal. The utility model can control the concentration of the coal powder and the concentration of the oxygen in the conveying pipeline by controlling the flow rate of the inert gas in the gas conveying pipe, and ensures that the coal powder and the air can be perfectly combined, so that the coal powder can be ensured to be fully combusted in the next stage, and the spontaneous combustion of the coal powder in the conveying pipeline can be avoided.
In addition, the utility model has reliable design principle, simple structure and very wide application prospect.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure, 1, a spray head, 2, a conveying pipeline, 3, a second filter tank, 4, a first filter tank, 5, a third air conveying pipe, 6, a third control valve, 7, an inert gas tank, 8, a fan, 9, a filter screen, 10, a stirring paddle, 11, a rotating shaft, 12, a first air conveying pipe, 13, a first control valve, 14, a feed hopper, 15, a third joint, 16, a first joint, 17, a second joint, 18, a second control valve, 19, a second air conveying pipe and 20 are three-way joints.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following explains key terms appearing in the present invention.
As shown in fig. 1, the present invention provides a pulverized coal blowing device, which includes a conveying pipe 2, wherein one end of the conveying pipe 2 is provided with a fan 8, and the other end of the conveying pipe 2 is provided with a nozzle 1. A feed hopper 14 and a three-way joint 20 are arranged above the conveying pipeline 2, and the outlet end of the feed hopper 14 is communicated with a third joint 15 of the three-way joint 20. The top of pipeline 2 still is provided with first filtration jar 4 and second filtration jar 3, wherein, the exit end of first filtration jar 4 and the exit end of second filtration jar 3 all communicate with pipeline 2, pipeline 2 is last still to be provided with first intercommunication switch and second intercommunication switch with the intercommunication department of first filtration jar 4 and second filtration jar 3 respectively. In addition, the inlet end of the first filter tank 4 is communicated with a first joint 16 of a three-way joint 20, the inlet end of the second filter tank 3 is communicated with a second joint 17 of the three-way joint 20, and a third communication switch and a fourth communication switch are respectively arranged on the first joint 16 and the second joint 17. And the first communication switch, the second communication switch, the third communication switch and the fourth communication switch are all preferably solenoid valves. Furthermore, in order to conveniently control the switches of the first communication switch, the second communication switch, the third communication switch and the fourth communication switch, the controller is further arranged and is in communication connection with the first communication switch, the second communication switch, the third communication switch and the fourth communication switch, and the controller can independently control the switches of the first communication switch, the second communication switch, the third communication switch and the fourth communication switch.
A first filtering component and a second filtering component are respectively arranged in the first filtering tank 4 and the second filtering tank 3, and the structures of the first filtering component and the second filtering component are the same. Taking the first filtering assembly as an example, the first filtering assembly comprises a filtering net 9, and the filtering net 9 is detachably mounted at the lower part of the first filtering tank 4. Furthermore, in order to prevent the coal dust from accumulating in the first filtering tank 4, a rotating shaft 11 is arranged above the filtering net 9, the rotating shaft 11 is rotatably arranged at the upper part of the first filtering tank 4, and a stirring paddle 10 is fixedly arranged on the rotating shaft 11. So that the pulverized coal can be stirred by rotating the rotary shaft 11.
In addition, in order to ensure that the concentration of the pulverized coal in the conveying pipeline 2 is matched with the concentration of the oxygen, the utility model is also provided with an inert gas tank 7, and the inert gas tank 7 is preferably arranged above the conveying pipeline 2, so that the length of the pipeline is reduced. Wherein, the inert gas tank 7 is communicated with a first gas pipe 12, a second gas pipe 19 and a third gas pipe 5. The first air conveying pipe 12 is communicated with the upper end of the first filtering tank 4, and a first control valve 13 is arranged on the first air conveying pipe 12; the second air delivery pipe 19 is communicated with the upper end of the second filtering tank 3, and a second control valve 18 is arranged on the second air delivery pipe 19; the third air delivery pipe 5 is communicated with the conveying pipeline 2, and a third control valve 6 is arranged on the third air delivery pipe 5. The first control valve 13, the second control valve 18 and the third control valve 6 are preferably solenoid valves, the first control valve 13, the second control valve 18 and the third control valve 6 are also in communication connection with a controller, and the controller can control the opening and closing of the first control valve 13, the second control valve 18 and the third control valve 6 independently.
In addition, an oxygen concentration measuring instrument and a dust concentration detector are also arranged in the conveying pipeline 2, and are both in communication connection with the controller; the controller can receive the output signal of the oxygen concentration measuring instrument and control the opening and closing of the third control valve 6 according to the output signal of the oxygen concentration measuring instrument; the controller can also receive the output signal of the dust concentration detector and independently control the opening and closing of the first control valve 13 and the second control valve 18 according to the output signal of the dust concentration detector, so that the coal powder concentration and the oxygen concentration in the conveying pipeline 2 are changed.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or alterations to the embodiments of the present invention may be made by those skilled in the art without departing from the spirit and substance of the present invention, and such modifications or alterations are intended to be within the scope of the present invention; any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present disclosure, and all such changes or substitutions are included in the scope of the present disclosure. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A pulverized coal blowing device is characterized by comprising a conveying pipeline (2), wherein one end of the conveying pipeline (2) is provided with a fan (8), the other end of the conveying pipeline (2) is provided with a spray head (1), a feed hopper (14) and a three-way joint (20) are arranged above the conveying pipeline (2), and the outlet end of the feed hopper (14) is communicated with a third joint (15) of the three-way joint (20); a first filtering tank (4) and a second filtering tank (3) are further arranged above the conveying pipeline (2), and a first filtering component and a second filtering component are respectively arranged in the first filtering tank (4) and the second filtering tank (3); the outlet end of the first filtering tank (4) and the outlet end of the second filtering tank (3) are both communicated with the conveying pipeline (2), and a first communicating switch and a second communicating switch are respectively arranged at the communication positions of the conveying pipeline (2) and the first filtering tank (4) and the second filtering tank (3); the inlet end of the first filtering tank (4) is communicated with a first joint (16) of a three-way joint (20), the inlet end of the second filtering tank (3) is communicated with a second joint (17) of the three-way joint (20), and a third communicating switch and a fourth communicating switch are respectively arranged on the first joint (16) and the second joint (17).
2. A pulverized coal blowing device as defined in claim 1, wherein said first filter unit comprises a filter screen (9), said filter screen (9) being detachably mounted on the lower part of the first filter tank (4); the top of filter screen (9) is provided with pivot (11), the rotatable upper portion of installing in first filtration jar (4) of pivot (11), fixed mounting has stirring rake (10) on pivot (11).
3. The pulverized coal blowing device according to claim 2, wherein the first filter unit and the second filter unit are identical in structure.
4. The pulverized coal blowing device according to claim 1, wherein an inert gas tank (7) is arranged above the conveying pipe (2), and a first gas conveying pipe (12) and a second gas conveying pipe (19) are communicated with the inert gas tank (7); the first air delivery pipe (12) is communicated with the upper end of the first filtering tank (4), and a first control valve (13) is arranged on the first air delivery pipe (12); the second air delivery pipe (19) is communicated with the upper end of the second filter tank (3), and a second control valve (18) is arranged on the second air delivery pipe (19).
5. The pulverized coal blowing device according to claim 4, characterized in that the inert gas tank (7) is further communicated with a third gas pipe (5), the third gas pipe (5) is communicated with the conveying pipeline (2), and the third gas pipe (5) is provided with a third control valve (6).
6. A pulverized coal blowing device according to claim 5, characterized in that the first control valve (13), the second control valve (18) and the third control valve (6) are all solenoid valves.
7. A pulverized coal blowing device according to claim 6, characterized by further comprising a controller connected in communication with the first control valve (13), the second control valve (18), the third control valve (6), the controller being capable of controlling the opening and closing of the first control valve (13), the second control valve (18), the third control valve (6) individually.
8. The pulverized coal blowing device according to claim 7, wherein an oxygen concentration measuring instrument is provided in the delivery duct (2), and the oxygen concentration measuring instrument is in communication connection with the controller; the controller can receive the output signal of the oxygen concentration measuring instrument and control the opening and closing of the third control valve (6) according to the output signal of the oxygen concentration measuring instrument.
9. The pulverized coal blowing device according to claim 7 or 8, wherein a dust concentration detector is provided in the conveying duct (2), said dust concentration detector being in communication with the controller; the controller can receive the output signal of the dust concentration detector and independently control the opening and closing of the first control valve (13) and the second control valve (18) according to the output signal of the dust concentration detector.
10. The pulverized coal blowing device according to claim 7, wherein the first communication switch, the second communication switch, the third communication switch and the fourth communication switch are solenoid valves, the controller is in communication connection with the first communication switch, the second communication switch, the third communication switch and the fourth communication switch, and the controller can control the switches of the first communication switch, the second communication switch, the third communication switch and the fourth communication switch individually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121366362.4U CN216047817U (en) | 2021-06-18 | 2021-06-18 | Pulverized coal blowing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121366362.4U CN216047817U (en) | 2021-06-18 | 2021-06-18 | Pulverized coal blowing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216047817U true CN216047817U (en) | 2022-03-15 |
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ID=80616123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121366362.4U Active CN216047817U (en) | 2021-06-18 | 2021-06-18 | Pulverized coal blowing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216047817U (en) |
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2021
- 2021-06-18 CN CN202121366362.4U patent/CN216047817U/en active Active
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