CN113477005A - Unpowered dust removal system suitable for coal is transported - Google Patents
Unpowered dust removal system suitable for coal is transported Download PDFInfo
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- CN113477005A CN113477005A CN202110662524.7A CN202110662524A CN113477005A CN 113477005 A CN113477005 A CN 113477005A CN 202110662524 A CN202110662524 A CN 202110662524A CN 113477005 A CN113477005 A CN 113477005A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/18—Preventing escape of dust
- B65G69/181—Preventing escape of dust by means of sealed systems
- B65G69/182—Preventing escape of dust by means of sealed systems with aspiration means
Abstract
The application provides an unpowered dust pelletizing system suitable for coal is transported, includes: the conveying channel is used for forming a relatively sealed conveying space; a coal dropping device for discharging coal to a transportation channel; a vortex generator for generating a vortex air flow to separate dust and air flow; the annular flow generator is used for generating annular airflow to separate dust from the airflow; the pressure balancer is used for adjusting the pressure on two sides of the pressure balancer to realize pressure balance; the separator is used for separating the dust from the airflow in an adsorption mode; the coal dropping device, the vortex generator, the annular flow generator and the separator are respectively communicated to a conveying space of the conveying channel; the pressure balancer is arranged in the conveying space of the conveying channel. The application has the beneficial effects that the unpowered dust removal system which utilizes the multiphase three-dimensional mechanics principle to reduce the dust and carry out dust treatment in a gas hybrid power mode and is suitable for coal transportation is provided.
Description
Technical Field
The application relates to a dust fall system, concretely relates to unpowered dust pelletizing system suitable for coal is transported.
Background
In the traditional thermal power plant, coal is used as the main power generation energy, and the conveying system is generally composed of a plurality of production links, including unloading, transporting, storing, taking out, crushing, coal blending to a coal bunker and the like. In the production links, a large amount of coal dust is generated in the operation process or the process of alternation with other production links, particularly, in the process of conveying coal by a belt conveyor and a belt conveyor after coal blocks in a coal conveying and screening facility are crushed, serious dust pollution is generated, the body health of field operators is greatly influenced, meanwhile, combustible particles and gas are mixed to form aerosol which is extremely easy to explode, the safety production of a power plant is seriously influenced, and the dust control is very urgent.
There are three dust removal techniques described in the related art documents, namely bag dust removal, electric dust removal and wet dust removal.
The bag type dust removal technology has strong adaptability to coal types and dust characteristics, has higher trapping rate to dust with different particle sizes, and can simultaneously remove various harmful gases, but the technology has low dust removal efficiency, large floor area, high manufacturing cost, complex dust removal, limited service life of a filter bag, large overhaul and maintenance workload and high maintenance and operation cost.
In addition, for dust removal of a conveying system, stable and effective dust gas extraction is a main challenge facing bag dust removal. The electrostatic dust removal technology is high in dust removal efficiency, small in resistance, low in energy consumption, low in operating cost and convenient to manage, high-temperature smoke dust can be treated, the technology is sensitive to external condition change, high-resistance dust and secondary raise dust obviously affect an electric dust remover, a dust discharging system is arranged, secondary pollution is caused, a large amount of overhaul and maintenance workload is generated, and the maintenance and operating cost is increased.
The wet dust removal technologies such as dry fog dust removal, multi-pipe flushing dust removal and the like have obvious dust suppression effect on the closed and semi-closed environment with unorganized emission, wherein the dry fog dust suppression technology is called as a revolution in the field of dust removal and a dust terminator, but the equipment investment adopting the technology is large, power needs to be continuously provided, the power consumption is large, the water consumption is large, secondary pollution can be caused, and the overhaul and maintenance workload is large.
In conclusion, the dust removal technology is mainly used for processing the fields of sufficient collection of dust and gas, such as coal-fired flue gas dust processing and the like, and has the defects of more dust sources, uneven distribution of airflow pressure, multiphase mixing of materials, gas and dust and complex mutual conversion for the dust in material conveying.
Disclosure of Invention
In order to solve prior art's weak point, the application provides an unpowered dust pelletizing system suitable for coal is transported, includes: the conveying channel is used for forming a relatively sealed conveying space; a coal dropping device for discharging coal to a transportation channel; a vortex generator for generating a vortex air flow to separate dust and air flow; the annular flow generator is used for generating annular airflow to separate dust from the airflow; the pressure balancer is used for adjusting the pressure on two sides of the pressure balancer to realize pressure balance; the separator is used for separating the dust from the airflow in an adsorption mode; the coal dropping device, the vortex generator, the annular flow generator and the separator are respectively communicated to the conveying space of the conveying channel; the pressure balancer is disposed in a transport space of the transport passage.
Further, the coal dropping device comprises a coal dropping pipe, at least part of the pipe wall of the coal dropping pipe is bent to form a curved coal dropping section, so that the coal falls into the conveying channel in a zigzag falling mode.
Furthermore, the curved coal dropping section of the coal dropping pipe at least has a first bending direction and a second bending direction, and the included angle formed by the first bending direction and the second bending direction ranges from 40 degrees to 70 degrees.
Further, the unpowered dust removal system suitable for coal transportation still includes:
the first type of air pressure coordination pipe is used for regulating the air pressure in the pipe inner space of the coal dropping pipe and the conveying space of the conveying channel;
the first type of air pressure coordination pipe is respectively connected to the inner space of the coal dropping pipe and the conveying space of the conveying channel.
Further, the first type of air pressure coordination pipe is communicated to the curve coal dropping section of the coal dropping pipe.
Further, the vortex generator includes: a vortex air inlet pipe, a vortex air outlet pipe and a vortex cavity; wherein the vortex gas inlet pipe is connected to a relatively upstream position of the transportation space of the transportation channel, and the vortex gas outlet pipe is connected to a relatively downstream position of the transportation space of the transportation channel; the vortex box body is communicated to the transportation space of the transportation channel through the vortex air inlet pipe and the vortex air outlet pipe.
Further, the ring flow generator comprises: a circulation air inlet pipe, a circulation air outlet pipe and a circulation cavity; wherein the circulation intake pipe is connected to a relatively upstream position of the transport space of the transport passage, and the circulation intake pipe is connected to a relatively downstream position of the transport space of the transport passage; the circulation cavity is communicated to the conveying space of the conveying channel through the circulation air inlet pipe and the circulation air outlet pipe.
Further, in the transport direction of the transport passage, the pressure balancer is disposed between the circulation intake pipe and the circulation exhaust pipe.
Further, the unpowered dust removal system suitable for coal transportation still includes: the second type of air pressure coordination pipe is used for regulating the air pressure at different positions of the transportation space of the transportation channel; the second type of air pressure coordination pipes are respectively connected to different positions of a conveying space of the conveying channel.
Furthermore, a pressure regulating valve is arranged in the second type air pressure coordination pipe to regulate the air pressure on two sides of the second type air pressure coordination pipe.
The application has the advantages that: the unpowered dust removal system is applicable to coal transportation, and utilizes a multiphase three-dimensional mechanical principle to reduce the power of dust and gas mixing for dust treatment.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a schematic diagram of the external configuration of the components of an unpowered dedusting system suitable for coal transfer according to one embodiment of the present application;
FIG. 2 is a schematic diagram of the internal structure of an unpowered dedusting system suitable for coal transportation according to one embodiment of the application.
The meaning of the reference symbols in the figures:
the unpowered dust removal system comprises a coal dropping pipe 100, a coal dropping pipe 101, a belt conveyor 102, a material guide chute 103, a vortex generator 104, a vortex air inlet pipe 1041, a vortex air outlet pipe 1042, a vortex cavity 1043, a ring generator 105, a circulation air inlet pipe 1051, a circulation air outlet pipe 1052, a circulation cavity 1053, a pressure balancer 106, a separator 107, an air inlet 1071 of the separator, an air outlet 1072 of the separator, a first-type air pressure coordinating pipe 108, a second-type air pressure coordinating pipe 109, an air inlet 1091 of the second-type air pressure coordinating pipe, an air outlet 1092 of the second-type air pressure coordinating pipe, a pressure regulating valve 110, a stop curtain 111 and a transportation space S.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but 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 application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1-2, the low dust transport system of the present application includes two main parts: a transportation system and an unpowered dust settling system. The conveying system provides a conveying channel with a conveying space, the conveying channel can convey coal from one position to another position, and the conveying space of the conveying channel is relatively closed for achieving the purpose of dust fall.
As a preferred solution, the transportation system comprises: belt feeder and seal assembly. The belt conveyor generates power for conveying coal, so that the coal can move according to the conveying direction; the sealing assembly is used for sealing the space position above the belt conveyor at least and forms a relatively sealed conveying space with the belt conveyor in the coal transferring process to compress gas in the conveying space, so that the distribution of the pressure in the sealed air is unbalanced, almost no additional power is needed, the pressure can be adjusted by using the device to realize internal self-balance, and the effect of treating gas dust in the conveying process is realized. As a preferred scheme, the sealing assembly can be formed by a guide chute device matched with the belt conveyor, and the guide chute device comprises guide plates arranged on two sides of the belt conveyor and a top cover and the like arranged right above the conveying space so as to surround the conveying space. As a specific scheme, the material guide groove device also comprises stop curtains arranged in the conveying direction, and the stop curtains stop in the conveying direction of the belt conveyor, but other sealing modes can also be used.
For convenience of description, the conveying channel can be divided into an upstream position and a downstream position according to the conveying direction, and the belt conveyor conveys coal from the upstream position of the conveying channel to the downstream position of the conveying channel.
As another aspect of the present application, the unpowered dust suppression system of the present application is used for dust control of dust in a transport system, and the dust suppression system performs a plurality of links such as dust suppression, dust collection and the like on the dust in a transport space by using a multiphase fluid mechanics principle.
More specifically, the unpowered dust settling system comprehensively considers multiple aspects and all factors such as space distribution of conveying equipment, a source for generating dust, the structure of the conveying equipment, influence of external air flow and the like from the principle of generating dust floating and flying, obtains a specific technical scheme from multiple aspects of reducing mixed gas powder power, increasing dust particle inhibition kinetic energy and adsorption and separation of dust particles and from multiple processes of dust suppression, dust settling, dust collection and dust removal by adopting an advanced computational fluid mechanics method and combining a gas dust movement mechanism, and processes such as dust settling, gas flow and particle distribution in the material conveying process.
It should be noted that, in particular, the parts of the device for forming the transport passage in the transport system, such as the sealing assembly (guide chute device), which have no transport function, may have the function of preventing dust from flying, so that the parts may also be included in the unpowered dustfall system of the present application.
Specifically, unpowered dust fall system includes: the device comprises a coal dropping device, a vortex generator, a ring flow generator, a pressure balancer, a separator, a first type air pressure coordinating pipe and a second type air pressure coordinating pipe.
Wherein the coal dropping device is used for discharging coal to a conveying channel with a conveying space.
As shown in fig. 1 and fig. 2, as a specific solution, the coal dropping device comprises a coal dropping pipe, at least part of the pipe wall of the coal dropping pipe is bent to form a curved coal dropping section, so that the coal drops into the conveying channel in a zigzag falling mode.
The curve coal breakage section of the coal breakage pipe at least has a first bending direction and a second bending direction, and the range of an included angle formed by the first bending direction and the second bending direction is 40-70 degrees, and further 45-60 degrees.
The coal dropping device adopts a curve coal dropping mode, so that the impact power of the coal dropping can be effectively relieved, and the falling speed of the coal flow can be reduced by utilizing the friction between the coal and the coal dropping device; in addition, the divergent coal flow can be converged into a coal flow by utilizing the shape of the coal dropping device, so that the driving effect of the coal flow on peripheral air flow is reduced; and the direction of the velocity vector of the coal flow terminal is changed by utilizing the turning angle of the coal dropping device so as to lead the coal flow terminal to follow the conveying direction of the belt, thereby reducing the impact force.
Preferably, the first type of air pressure coordination pipe is respectively connected to the pipe inner space of the coal dropping pipe and the transportation space of the transportation channel, and is used for adjusting the air pressure in the pipe inner space of the coal dropping pipe and the transportation space of the transportation channel, and specifically, the first type of air pressure coordination pipe is used for releasing higher air pressure generated by coal dropping impact.
As a further preferred scheme, the first type of air pressure coordination pipe is communicated to the curve coal dropping section of the coal dropping pipe. Of course, the first type of air pressure coordination pipe can be arranged at a plurality of positions so as to adjust the positions of other air pressure imbalances in the conveying space.
The vortex generator includes: a vortex inlet pipe, a vortex outlet pipe and a vortex cavity, the vortex cavity being substantially configured as a cone having a truncated cone; the vortex gas inlet pipe is connected to the position, opposite to the upstream position, of the conveying space of the conveying channel, and the vortex gas outlet pipe is connected to the position, opposite to the downstream position, of the conveying space of the conveying channel; the vortex box body is communicated to a conveying space of the conveying channel through a vortex air inlet pipe and a vortex air outlet pipe. The air-dust mixed fluid of mixed air (generally air) and dust enters the vortex cavity through the vortex air inlet pipe, and a spiral vortex flow guide structure is arranged in the vortex cavity, so that the air-powder mixed fluid flows in a vortex mode to reduce the power of the air-powder mixed fluid, and then returns to the conveying space through the vortex air outlet pipe.
The annular flow generator comprises: a circulation air inlet pipe, a circulation air outlet pipe and a circulation cavity; wherein the circulation intake pipe is connected to a relatively upstream position of the transport space of the transport passage, and the circulation intake pipe is connected to a relatively downstream position of the transport space of the transport passage; the circulation cavity is communicated to the conveying space of the conveying channel through a circulation air inlet pipe and a circulation air outlet pipe. The circular flow cavity is provided with an annular circular flow guide channel, the circular flow air inlet pipe and the circular flow air outlet pipe are respectively connected to the circular flow guide channel, air flow can enter the circular flow guide channel from the circular flow air inlet pipe, then a part of air flow is discharged from the circular flow air outlet pipe, and a part of air flow is continuously circulated in the circular flow guide channel.
Preferably, several flow damping devices are arranged in the circular guide channel, and the flow damping devices are used for damping the dynamic force of the fluid, specifically, the flow damping devices uniformly reduce the passable cross section of the circular guide channel. As a particular approach, the flow moderating apparatus may be configured as a perforated baffle or other similar screen structure.
Preferably, the damping means is disposed between the inlet pipe and the outlet pipe in the direction of flow of the gas stream, so that the gas-dust mixture fluid is decelerated during its passage to slow down the velocity of the fluid exiting the outlet pipe.
Alternatively, the vortex generators and the ring generators may be provided in plural sets to decelerate the dust-air mixture flow plural times and in stages.
As a further preferable mode, the inner walls of the vortex chamber and the circulation chamber are configured to have rough inner wall surfaces, and hydrodynamic force is further reduced by friction.
The pressure balancer is arranged in the conveying space and is used for adjusting the fluid pressure on two sides of the pressure balancer so as to realize pressure balance. Specifically, a pressure balancer is provided at a position between the circulation intake pipe and the circulation exhaust pipe in the transport direction of the transport path. Preferably, the pressure balancer may comprise one or more pneumatically balanced valves. They may be located in different positions. Preferably, a pneumatic balance valve is adopted
In order to further improve the pressure balance condition in the conveying space, a second type of air pressure coordination pipe is also arranged and used for regulating the air pressure of different positions of the conveying space of the conveying channel. Specifically, the air inlet and the air outlet of the second type air pressure coordination pipe are both arranged on the same side of the pressure balancer (pneumatic balance valve). The span between the air inlet and the air outlet of the second type of air pressure coordination pipe in the conveying direction is larger than the span between the butting position of the vortex air outlet pipe and the butting position of the circulation air inlet pipe in the conveying direction; in the conveying direction, the butt joint position of the vortex air outlet pipe and the butt joint position of the circulation air inlet pipe are arranged between the air inlet and the air outlet of the second type air pressure coordinating pipe.
As a specific scheme, a pressure regulating valve is arranged in the second type of air pressure coordination pipe to regulate the air pressure on two sides of the second type of air pressure coordination pipe.
Through the action of the vortex generator, the annular flow generator and other air pressure adjusting devices, dust in the air-powder mixed fluid is partially deposited inside the devices, and the fluid power of the devices is greatly reduced, so that the dust is partially collected after flowing through the separator to form settled powder particles, and the settled powder particles are separated from clean air flow.
In particular, the air inlet and the air outlet of the separator are respectively connected to the baffle box device so as to communicate with the transport space, and the separator may be preferably configured as a vortex separator or a filter box having a filtering device.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides an unpowered dust pelletizing system suitable for coal is transported which characterized in that:
the unpowered dust pelletizing system suitable for coal is transported includes:
the coal dropping device is used for discharging coal to a conveying channel with a conveying space;
a vortex generator for generating a vortex air flow to separate dust and air flow;
the annular flow generator is used for generating annular airflow to separate dust from the airflow;
the pressure balancer is used for adjusting the pressure on two sides of the pressure balancer to realize pressure balance;
the separator is used for separating the dust from the airflow in an adsorption mode;
the coal dropping device, the vortex generator, the annular flow generator and the separator are respectively communicated to the conveying space of the conveying channel; the pressure balancer is disposed in a transport space of the transport passage.
2. The unpowered dedusting system suitable for coal transfer of claim 1, wherein:
the coal dropping device comprises a coal dropping pipe, wherein at least part of the pipe wall of the coal dropping pipe is bent to form a curved coal dropping section, so that coal falls into the conveying channel in a zigzag falling mode.
3. The unpowered dedusting system suitable for coal transfer of claim 2, wherein:
the curve coal breakage section of the coal breakage pipe at least has a first bending direction and a second bending direction, and the value range of an included angle formed by the first bending direction and the second bending direction is 40-75 degrees.
4. The unpowered dedusting system suitable for coal transfer of claim 3, wherein:
the unpowered dust pelletizing system suitable for coal is transported still includes:
the first type of air pressure coordination pipe is used for regulating the air pressure in the pipe inner space of the coal dropping pipe and the conveying space of the conveying channel;
the first type of air pressure coordination pipe is respectively connected to the inner space of the coal dropping pipe and the conveying space of the conveying channel.
5. The unpowered dedusting system suitable for coal transfer of claim 4, wherein:
the first type of air pressure coordination pipe is communicated to the curve coal dropping section of the coal dropping pipe.
6. The unpowered dedusting system suitable for coal transfer of claim 1, wherein:
the vortex generator includes: a vortex air inlet pipe, a vortex air outlet pipe and a vortex cavity; wherein the vortex gas inlet pipe is connected to a relatively upstream position of the transportation space of the transportation channel, and the vortex gas outlet pipe is connected to a relatively downstream position of the transportation space of the transportation channel; the vortex box body is communicated to the transportation space of the transportation channel through the vortex air inlet pipe and the vortex air outlet pipe.
7. The unpowered dedusting system suitable for coal transfer of claim 1, wherein:
the annular flow generator comprises: a circulation air inlet pipe, a circulation air outlet pipe and a circulation cavity; wherein the circulation intake pipe is connected to a relatively upstream position of the transport space of the transport passage, and the circulation intake pipe is connected to a relatively downstream position of the transport space of the transport passage; the circulation cavity is communicated to the conveying space of the conveying channel through the circulation air inlet pipe and the circulation air outlet pipe.
8. The unpowered dedusting system suitable for coal transfer of claim 7, wherein:
and in the conveying direction of the conveying channel, the pressure balancer is arranged between the circular air inlet pipe and the circular air outlet pipe.
9. The unpowered dedusting system suitable for coal transfer of claim 1, wherein:
the unpowered dust pelletizing system suitable for coal is transported still includes:
the second type of air pressure coordination pipe is used for regulating the air pressure at different positions of the transportation space of the transportation channel;
the second type of air pressure coordination pipes are respectively connected to different positions of a conveying space of the conveying channel.
10. The unpowered dedusting system adapted for coal transfer of claim 9, wherein:
and a pressure regulating valve is arranged in the second type of air pressure coordination pipe to regulate the air pressure at two sides of the second type of air pressure coordination pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110662524.7A CN113477005A (en) | 2021-06-15 | 2021-06-15 | Unpowered dust removal system suitable for coal is transported |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110662524.7A CN113477005A (en) | 2021-06-15 | 2021-06-15 | Unpowered dust removal system suitable for coal is transported |
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