CN118002330A - Rapid sorting device and method for light matter evidence in fire scene and control system thereof - Google Patents
Rapid sorting device and method for light matter evidence in fire scene and control system thereof Download PDFInfo
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- CN118002330A CN118002330A CN202410265458.3A CN202410265458A CN118002330A CN 118002330 A CN118002330 A CN 118002330A CN 202410265458 A CN202410265458 A CN 202410265458A CN 118002330 A CN118002330 A CN 118002330A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/0012—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain)
- B02C19/005—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain) the materials to be pulverised being disintegrated by collision of, or friction between, the material particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C11/00—Accessories, e.g. safety or control devices, not otherwise provided for, e.g. regulators, valves in inlet or overflow ducting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
- B04C5/04—Tangential inlets
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- Food Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention provides a rapid sorting device and method for light matter evidence in a fire scene and a control system thereof. The method comprises the following steps: opening a variable frequency fan, and enabling air flow to enter a cyclone separation cavity through a double inlet of an air inlet to form a spiral upward flow field; injecting materials into the cyclone separation cavity from the charging port, throwing the materials to the wall surface for rotation under the action of a flow field, and continuously colliding and grinding the materials in the high-speed rotation process; the soot with smaller hardness in the material is gradually reduced in particle size and gradually weakened in centrifugal force under the action of collision and grinding, and is conveyed to a gas-solid separation system along a vertical riser after reaching the standard; after the fine-grained materials enter the gas-solid separation system, according to the principle of a cyclone separator, air is discharged out of the system along a riser, and the fine-grained materials are effectively separated; after separation is completed, the variable frequency fan is closed, and coarse-grain materials and fine-grain materials are respectively collected; the collected fine-grained matter is further identified as a light matter evidence of a fire scene.
Description
Technical Field
The invention relates to the field of micro-fine particle dry separation, in particular to a device and a method for rapidly separating light matters and certificates in a fire scene and a control system thereof.
Background
The accurate extraction and analysis of the material evidence of the fire scene are the basic precondition for judging the cause of the fire accident, and the analysis of whether cigarette ashes (ash for short) exist in the burning ashes is an important index for judging the cause of the fire. Under the prior art conditions, it is generally necessary to acid leach and extract all combustion ashes on site, and then analyze the characteristic peaks of specific substances in the soot by using a corresponding spectrometer. Due to extremely low ash content, the identification method is large in workload, long in identification period and low in characteristic peak identification precision. It is therefore important to separate and enrich as much as possible the fine particulate soot from the mixed solid combustion grits into a small sample.
At present, the traditional micro-fine particle sorting technology comprises the following steps: electric field sorting techniques, magnetic field sorting techniques, optical sorting techniques, and air flow sorting techniques. The electric field separation technology relies on the conductivity of materials, and has poor effect on some materials with similar conductivity; the magnetic field separation technology is only effective for materials with magnetism, and is ineffective for non-magnetic materials; the optical sorting technology has poor sorting effect on materials with similar colors or materials with insignificant optical characteristics. There is no obvious difference in electrical, magnetic and color between ash and soot, so that the techniques of electroseparation, magnetic separation and optical separation are not suitable for ash separation.
Airflow sorting is a process of separating particles according to the size, density and shape differences of the particles. In the gas flow separation, particles are mixed in the gas flow, and by adjusting the gas flow speed and direction, large particles and small particles are subjected to different gas resistances, so that they are respectively settled or carried. Air-jet milling is a process in which particles are mechanically milled using a high velocity air stream. In gas flow milling, particles are carried into a milling chamber by a high velocity gas flow, where they collide with and mill the milling media under the influence of the gas. However, conventional air-jet milling equipment is often bulky and expensive and not suitable for carrying.
In view of the fact that the density and the particle size of the ash are similar, but the particle shape is different, the particle size difference of the ash and the ash can be increased by adopting an airflow grinding method, and the particles are separated by utilizing an airflow separation technology, so that the ash and other interferents can be effectively separated.
Disclosure of Invention
In view of the defects existing in the prior art and the limitations of working conditions in production practice, the invention provides a rapid sorting method and equipment for light material evidence in a fire scene. The whole equipment adopts high-speed air flow to convey materials, so that the equipment is continuous and controllable and has compact structure.
The invention adopts the following technical means:
A rapid sorting device for light matter evidence in fire scene, comprising: the rotary fluidization separation system and the gas-solid separation system are connected through a pipeline, wherein:
The rotary fluidization separation system is used for grinding the ash particles and separating ash and gravel;
the gas-solid separation system is used for separating gas from solid in the centrifugal force field.
Further, the rotary fluid sorting system includes: feed inlet, vertical riser, whirl separation chamber, air intake and coarse grain material collecting vessel, wherein:
the charging port is arranged at the top of the cyclone separation cavity and is used for adding the light material certificate of the fire scene into the cyclone separation cavity;
the vertical lifting pipe is inserted into the cyclone separation cavity from the center of the top of the cyclone separation cavity and is used for conveying the screened fine materials to the gas-solid separation system;
The top end of the cyclone separation cavity is provided with a feed inlet and a vertical lifting pipe, and the bottom of the cyclone separation cavity is connected with a coarse grain material collecting barrel for screening and separating coarse grains and fine grains;
The air inlet is arranged at the bottom of the cyclone separation cavity, adopts a double-inlet structure and is used for ensuring that the axial speed direction of a flow field in the cyclone separation cavity is upward;
the coarse-grain material collecting barrel is connected to the bottom of the cyclone separation cavity and used for collecting separated coarse-grain materials.
Further, the gas-solid separation system includes: riser, entry, cylinder chamber, circular cone chamber and particulate material collecting vessel, wherein:
the riser is inserted into the cylindrical cavity from the center of the top of the cylindrical cavity and is used for exhausting air out of the gas-solid separation system;
the inlet is arranged on the side wall of the cylindrical cavity, is connected with the outlet of the vertical lifting pipe and is used for inputting the fine materials screened out by the rotary fluidization separation system into the gas-solid separation system;
The top of the cylindrical cavity is provided with a riser, and the bottom of the cylindrical cavity is connected with a conical cavity; the bottom of the conical cavity is connected with a fine material collecting barrel; the fine material collecting barrel is used for collecting fine materials separated by the gas-solid separation system.
Further, the vertical lifting pipe is also provided with a first-stage pressure measuring hole, and the first-stage pressure measuring hole is connected with a pressure gauge;
The height of the cyclone separation cavity is more than twice the diameter of the cyclone separation cavity; the height of the vertical lifting pipe inserted into the cyclone separation cavity is greater than half of the integral height of the cyclone separation cavity;
The bottom of the cyclone separation cavity is connected with the coarse-grain material collecting barrel through a flange plate.
Further, the tail end of the output port of the vertical lifting pipe is provided with a transition section, and the transition section adopts the excessive design from round to rectangular, so that the smooth connection from the rotary fluidization separation system to the gas-solid separation system is realized.
Further, the air inlets are spiral cases, a tangential double-inlet structure is adopted, and the two air inlets are rotationally symmetrical at 180 degrees; two inlets of the air inlet are respectively connected with a variable frequency fan, so that uniform air intake is ensured;
the variable frequency fan is connected with the flowmeter, and the flow output by the variable frequency fan is measured in real time.
Further, a secondary pressure measuring hole is formed in the side wall of the gas lift pipe and is connected with a pressure gauge;
The conical cavity is connected with the fine material collecting barrel through a flange plate.
The invention also provides a working method of the rapid sorting device for the light matters in the fire scene, which comprises the following specific steps:
s1, opening a variable frequency fan, and enabling air flow to enter a cyclone separation cavity through a double inlet of an air inlet to form a spiral upward flow field;
S2, injecting materials into the cyclone separation cavity from the feed inlet, throwing the materials to the wall surface for rotation under the action of a flow field, and continuously colliding and grinding the particles of the materials and the walls of the cavity in the high-speed rotation process;
s3, gradually reducing the particle size and gradually weakening the centrifugal force of the ash with smaller hardness in the material under the action of collision and grinding, and conveying the ash to a gas-solid separation system along a vertical riser after reaching the standard;
S4, after the fine-grained materials enter the gas-solid separation system, according to the principle of a cyclone separator, air is discharged out of the system along a riser, and the fine-grained materials are effectively separated;
S5, after separation is completed, the variable frequency fan is closed, coarse-grain materials are collected into the coarse-grain material collecting barrel, fine-grain materials are collected into the fine-grain material collecting barrel, and the collected fine-grain materials are used as light matters of a fire scene for further identification.
The invention also provides a control system of the rapid sorting device for the light matters in the fire scene, which comprises the following components: the system comprises a main control module, a display module, a manual adjustment module, a data conversion and storage module, an electric signal processing module and a measurement module, wherein:
The main control module is connected with the display module, the manual adjustment module and the data conversion and storage module and is used as a control center for controlling the rapid sorting device and the control system of the light material evidence in the fire scene;
The measuring module is connected with the pressure gauge and the flowmeter, and is used for measuring the pressure at the first-stage pressure measuring hole and the second-stage pressure measuring hole and the flow output by the variable-frequency fan, and transmitting the data to the data conversion and storage module;
The data conversion module and the storage module are connected with the measurement module and are used for acquiring measurement data, processing the data and then sending the processed data to the main control module;
the display module is connected with the main control module and used for displaying the processing data collected by the main control module;
the electric signal processing module is connected with the variable frequency fan and used for monitoring and acquiring the electric signal change of the variable frequency fan during working and inputting the electric signal into the manual adjustment module;
The manual adjustment module is connected with the electric signal processing module, and adjusts various outputs of the variable frequency fan through intervention of the manual adjustment module when electric signal data of the variable frequency fan are abnormal or do not meet the requirements, and transmits the data to the main control module.
Compared with the prior art, the invention has the following advantages:
1. The rapid sorting device and method for the light material evidence in the fire scene and the control system thereof, provided by the invention, carry out accurate control on the flow field in the cyclone sorting cavity in the cyclone sorting system. The double air inlet structure is adopted, so that the flow fields in the sorting cavity are symmetrically distributed, and the stability of the sorting process is enhanced; the lower side air inlet mode is adopted, so that particles are in a fluidized state, and the collision probability and collision energy of the particles are increased.
2. The invention relates to a rapid sorting device, a rapid sorting method and a rapid sorting control system for light matters in a fire scene, wherein in a rotary fluidization sorting system, the materials undergo a strong centrifugal force field effect in a cyclone sorting cavity. The coarser material is thrown to the inner wall of the cavity and starts to rotate due to the influence of strong centrifugal force. Meanwhile, the materials with finer granularity are conveyed to the gas-solid separation system through the riser due to weaker centrifugal force, and the design of the rotary fluidization separation system realizes the efficient separation of coarse-grain and fine-grain materials. In a gas-solid separation system, fine material is deposited in a fine material collection tank while gas is exhausted along a riser, the design of the gas-solid separation system enabling very fine material to be effectively separated from air in a strong turbulent flow field. Overall, the combined technology of the rotary fluid separation system and the gas-solid separation system combines the separation and separation processes of the fine particulate material, enabling continuous and efficient operation of the apparatus.
3. According to the rapid sorting device, method and control system for the light material evidence in the fire scene, in the rotary fluidization system, the ash particles with smaller hardness are ground by utilizing the jet friction crushing technology, and the sand particles with larger hardness in ash are hardly influenced, so that the granularity difference of the ash particles and the sand particles in the ash is enlarged, and the problem that the ash particles and the sand particles in the ash are difficult to separate is solved.
4. According to the rapid sorting device, method and control system for the light material evidence in the fire scene, a fluidized bed technology is introduced into a rotary fluidization sorting system, and the technology enables the materials to be uniformly dispersed and subjected to the comprehensive effect of air flow by enabling the materials to be in a flowing state. The fluidized bed technology is introduced, so that the processing capacity of materials in sorting can be effectively increased, the materials can be subjected to large-scale sorting operation, and the fluidized bed technology is successfully applied to the industrial field, so that an advanced and feasible solution is provided for realizing efficient and large-scale material sorting.
For the reasons, the invention can be widely popularized in the fields of micro-fine particle dry separation and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic structural diagram of a rapid sorting device for light matter evidence in a fire scene in the invention.
Fig. 2 is a diagram of a rapid sorting device for light material evidence in fire scene and a control system thereof in the invention.
Fig. 3 is a front view of a rotary fluid sorting system according to the present invention.
Fig. 4 is a section A-A of fig. 3.
Fig. 5 is a sectional view of B-B in fig. 3.
Fig. 6 is a front view of the gas-solid separation system of the present invention.
Fig. 7 is a section A-A of fig. 6.
Fig. 8 is a sectional view of B-B in fig. 6.
Fig. 9 is a graph of pressure drop and flow rate variation at different frequencies for the present invention.
FIG. 10 is a graph comparing the classified fine and coarse products of the present invention.
FIG. 11 shows the results of laser particle size testing of the material before and after sorting according to the present invention.
In the figure: 1. a riser; 2. a first-stage pressure measuring hole; 3. a second-stage pressure measuring hole; 4. a feed inlet; 5. an inlet; 6. a vertical riser; 7. a cylindrical cavity; 8. a cyclone separation cavity; 9. a conical cavity; 10. an air inlet; 11. a fine material collecting barrel; 12. a coarse material collecting barrel; 13. and a transition section.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
As shown in fig. 1, the present invention provides a rapid sorting device for light matter evidence in fire scene, comprising: the rotary fluidization separation system and the gas-solid separation system are connected through a pipeline, wherein:
The rotary fluidization separation system is used for grinding the ash particles and separating ash and gravel;
the gas-solid separation system is used for separating gas from solid in the centrifugal force field.
In specific implementation, as a preferred embodiment of the present invention, the rotary fluidized sorting system includes: feed inlet 4, vertical riser 6, whirl separation chamber 8, air intake 10 and coarse grain material collecting vessel 12, wherein:
the charging port 4 is arranged at the top of the cyclone separation cavity 8 and is used for charging the light matter certificate in the fire scene into the cyclone separation cavity 8;
in practice, the feed inlet 4 is far away from the air inlet 10 and the vertical lifting pipe 6, so as to increase the separation distance, ensure that the materials can be sufficiently ground, and simultaneously ensure the symmetry of the flow field at the air inlet.
The vertical lifting pipe 6 is inserted into the cyclone separation cavity 8 from the center of the top of the cyclone separation cavity 8 and is used for conveying the screened fine materials to the gas-solid separation system;
The top end of the cyclone separation cavity 8 is provided with a feed inlet 4 and a vertical lifting pipe 6, and the bottom is connected with a coarse grain material collecting barrel for screening and separating coarse grains and fine grains;
the air inlet 10 is arranged at the bottom of the cyclone separation cavity 8, adopts a double-inlet structure and is used for ensuring that the axial speed direction of a flow field in the cyclone separation cavity is upward;
The coarse material collecting barrel 12 is connected to the bottom of the cyclone separation cavity 8 and is used for collecting separated coarse materials.
In implementation, the cyclone separation cavity 8 is connected with the double inlet of the volute type air inlet 10 in a tangential or spiral line mode; the air inlet 10 adopts a down-blowing mode,
In specific implementation, as a preferred embodiment of the present invention, the gas-solid separation system includes: riser 1, inlet 5, cylindrical chamber 7, conical chamber 9 and fine particulate material collecting vessel 11, wherein:
the riser pipe 1 is inserted into the cylindrical cavity 7 from the center of the top of the cylindrical cavity 7 and is used for exhausting air out of the gas-solid separation system;
The inlet 5 is arranged on the side wall of the cylindrical cavity 7, is connected with the outlet of the vertical lifting pipe 6 and is used for inputting the fine materials screened out by the rotary fluidization separation system into the gas-solid separation system;
The top of the cylindrical cavity 7 is provided with a riser 1, and the bottom of the cylindrical cavity is connected with a conical cavity 9; the bottom of the conical cavity 9 is connected with a fine material collecting barrel 11; the fine material collecting barrel 11 is used for collecting fine materials separated by the gas-solid separation system.
In specific implementation, as a preferred embodiment of the present invention, the vertical riser 6 is further provided with a primary pressure measuring hole 2, and the primary pressure measuring hole 2 is connected with a pressure gauge;
The height of the cyclone separation cavity 8 is more than twice the diameter of the cyclone separation cavity; the height of the part of the vertical lifting pipe 6 inserted into the cyclone separation cavity 8 is greater than half of the whole height of the cyclone separation cavity 8; so as to ensure that the materials are fully fluidized and ground.
The bottom of the cyclone separation cavity 8 is connected with a coarse-grain material collecting barrel 12 through a flange plate.
In specific implementation, as a preferred embodiment of the invention, the end of the output port of the vertical riser 6 is provided with a transition section 13, and the transition section 13 adopts a round-to-rectangular over design to realize stable connection from the rotary fluidization separation system to the gas-solid separation system.
In specific implementation, as a preferred embodiment of the present invention, the air inlet 10 is of a volute type, and adopts a tangential dual-inlet structure, and the two air inlets are rotationally symmetrical at 180 degrees; two inlets of the air inlet 10 are respectively connected with a variable frequency fan, so that uniform air intake is ensured; so as to realize symmetrical distribution of the fluid flow fields in the cyclone separation cavity 8, thereby making the cyclone separation cavity more stable.
The variable frequency fan is connected with the flowmeter, and the flow output by the variable frequency fan is measured in real time.
In specific implementation, as a preferred embodiment of the present invention, a secondary pressure measuring hole 3 is provided on the sidewall of the riser 1, and the secondary pressure measuring hole 3 is connected with a pressure gauge;
the conical cavity 9 is connected with a fine material collecting barrel 11 through a flange plate.
The invention also discloses a working method of the rapid sorting device for the light matters in the fire scene, which comprises the following specific steps:
S1, opening a variable frequency fan, and enabling air flow to enter a cyclone separation cavity 8 through a double inlet of an air inlet 10 to form a spiral upward flow field;
S2, injecting materials into the cyclone separation cavity 8 from the charging port 4, throwing the materials to the wall surface for rotation under the action of a flow field, and continuously colliding and grinding the particles of the materials and the walls of the cavity in the high-speed rotation process;
S3, gradually reducing the particle size and gradually weakening the centrifugal force of the ash with smaller hardness in the material under the action of collision and grinding, and conveying the ash to a gas-solid separation system along a vertical riser 6 after reaching the standard;
S4, after the fine-grained materials enter the gas-solid separation system, according to the principle of a cyclone separator, air is discharged out of the system along a riser, and the fine-grained materials are effectively separated;
S5, after separation is completed, the variable frequency fan is turned off, coarse-grain materials are collected into the coarse-grain material collecting barrel 12, fine-grain materials are collected into the fine-grain material collecting barrel 11, and the collected fine-grain materials are further identified as light matters in a fire scene.
The invention also comprises a control system of the rapid sorting device for the light matters in the fire scene, which comprises: the system comprises a main control module, a display module, a manual adjustment module, a data conversion and storage module, an electric signal processing module and a measurement module, wherein:
The main control module is connected with the display module, the manual adjustment module and the data conversion and storage module and is used as a control center for controlling the rapid sorting device and the control system of the light material evidence in the fire scene;
the measuring module is connected with the pressure gauge and the flowmeter, and is used for measuring the pressure at the first-stage pressure measuring hole 2 and the second-stage pressure measuring hole 3 and the flow output by the variable-frequency fan, and transmitting the data to the data conversion and storage module;
The data conversion module and the storage module are connected with the measurement module and are used for acquiring measurement data, processing the data and then sending the processed data to the main control module;
the display module is connected with the main control module and used for displaying the processing data collected by the main control module;
the electric signal processing module is connected with the variable frequency fan and used for monitoring and acquiring the electric signal change of the variable frequency fan during working and inputting the electric signal into the manual adjustment module;
The manual adjustment module is connected with the electric signal processing module, and adjusts various outputs of the variable frequency fan through intervention of the manual adjustment module when electric signal data of the variable frequency fan are abnormal or do not meet the requirements, and transmits the data to the main control module.
Examples
As shown in fig. 1, the invention provides a rapid sorting device, a rapid sorting system and a rapid sorting working method for light matters in a fire scene, wherein in the implementation, the pressure drop and the flow of a combined system under different frequencies are measured, the relation between the pressure drop and the flow is shown in fig. 9, the sorted micro-grain products and coarse grain products are shown in fig. 10, and the laser granularity test results of the materials before and after sorting are shown in fig. 11.
From the experimental results of the embodiment, the device can effectively separate coarse grain materials from fine grain materials, is favorable for extracting light material evidence in a fire scene, and can be applied to the industrial field.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. Quick sorting unit of scene of fire light thing certificate, its characterized in that includes: the rotary fluidization separation system and the gas-solid separation system are connected through a pipeline, wherein:
The rotary fluidization separation system is used for grinding the ash particles and separating ash and gravel;
the gas-solid separation system is used for separating gas from solid in the centrifugal force field.
2. The rapid fire scene lightweight material evidence sorting device according to claim 1, wherein the rotary fluidization sorting system comprises: feed inlet (4), vertical riser (6), whirl separation chamber (8), air intake (10) and coarse grain material collecting vessel (12), wherein:
The charging port (4) is arranged at the top of the cyclone separation cavity (8) and is used for adding the light matter certificate in the fire scene into the cyclone separation cavity (8);
The vertical lifting pipe (6) is inserted into the cyclone separation cavity (8) from the center of the top of the cyclone separation cavity (8) and is used for conveying the screened fine materials to the gas-solid separation system;
The cyclone separation cavity (8) is provided with a feed inlet (4) and a vertical lifting pipe (6) at the top end, and a coarse grain material collecting barrel is connected to the bottom for screening and separating coarse grains and fine grains;
The air inlet (10) is arranged at the bottom of the cyclone separation cavity (8), adopts a double-inlet structure and is used for ensuring that the axial speed direction of a flow field in the cyclone separation cavity is upward;
The coarse-grain material collecting barrel (12) is connected to the bottom of the cyclone separation cavity (8) and is used for collecting separated coarse-grain materials.
3. The rapid fire scene lightweight material evidence sorting device according to claim 1, wherein the gas-solid separation system comprises: riser (1), entry (5), cylinder chamber (7), circular cone chamber (9) and particulate material collecting vessel (11), wherein:
The riser (1) is inserted into the cylindrical cavity (7) from the center of the top of the cylindrical cavity (7) and is used for exhausting air out of the gas-solid separation system;
the inlet (5) is arranged on the side wall of the cylindrical cavity (7), is connected with the outlet of the vertical lifting pipe (6) and is used for inputting the fine materials screened out by the rotary fluidization separation system into the gas-solid separation system;
The cylindrical cavity (7) is provided with a riser (1) at the top and a conical cavity (9) at the bottom; the bottom of the conical cavity (9) is connected with a fine material collecting barrel (11); the fine material collecting barrel (11) is used for collecting fine materials separated by the gas-solid separation system.
4. The rapid sorting device for light objects and evidence in fire scene according to claim 2, characterized in that the vertical lifting pipe (6) is also provided with a primary pressure measuring hole (2), and the primary pressure measuring hole (2) is connected with a pressure gauge;
the height of the cyclone separation cavity (8) is more than twice the diameter of the cyclone separation cavity; the height of the part of the vertical lifting pipe (6) inserted into the cyclone separation cavity (8) is greater than half of the whole height of the cyclone separation cavity (8);
the bottom of the cyclone separation cavity (8) is connected with a coarse-grain material collecting barrel (12) through a flange plate.
5. The rapid sorting device for light objects and evidence in fire scene according to claim 2, characterized in that the tail end of the output port of the vertical lifting pipe (6) is provided with a transition section (13), and the transition section (13) adopts a round-to-rectangular excessive design to realize the stable connection from the rotary fluidization sorting system to the gas-solid separation system.
6. The rapid sorting device for light objects and evidence in fire scene according to claim 2, characterized in that the air inlet (10) is of a volute type, adopts a tangential double-inlet structure, and is rotationally symmetrical at 180 degrees; two inlets of the air inlet (10) are respectively connected with a variable frequency fan, so that uniform air intake is ensured;
the variable frequency fan is connected with the flowmeter, and the flow output by the variable frequency fan is measured in real time.
7. The rapid sorting device for light objects and evidence in fire scene according to claim 3, wherein a secondary pressure measuring hole (3) is arranged on the side wall of the riser (1), and the secondary pressure measuring hole (3) is connected with a pressure gauge;
The conical cavity (9) is connected with a fine material collecting barrel (11) through a flange plate.
8. A method for operating a rapid sorting device for light objects and certificates in a fire scene according to any of claims 1 to 7, characterized in that the method comprises the following specific steps:
s1, opening a variable frequency fan, and enabling air flow to enter a cyclone separation cavity (8) through a double inlet of an air inlet (10) to form a spiral upward flow field;
S2, injecting materials into a cyclone separation cavity (8) from a charging port (4), throwing the materials to a wall surface for rotation under the action of a flow field, and continuously colliding and grinding between particles of the materials and between the particles and the wall of the cavity in the high-speed rotation process;
s3, gradually reducing the particle size and gradually weakening the centrifugal force of the ash with smaller hardness in the material under the action of collision and grinding, and conveying the ash to a gas-solid separation system along a vertical riser (6) after reaching the standard;
S4, after the fine-grained materials enter the gas-solid separation system, according to the principle of a cyclone separator, air is discharged out of the system along a riser, and the fine-grained materials are effectively separated;
S5, after separation is completed, the variable frequency fan is closed, coarse-grain materials are collected into the coarse-grain material collecting barrel (12), fine-grain materials are collected into the fine-grain material collecting barrel (11), and the collected fine-grain materials are used as light matters of a fire scene for further identification.
9. A control system for a rapid fire scene lightweight evidence sorting apparatus according to any of claims 1 to 7, comprising: the system comprises a main control module, a display module, a manual adjustment module, a data conversion and storage module, an electric signal processing module and a measurement module, wherein:
The main control module is connected with the display module, the manual adjustment module and the data conversion and storage module and is used as a control center for controlling the rapid sorting device and the control system of the light material evidence in the fire scene;
The measuring module is connected with the pressure gauge and the flowmeter, and is used for measuring the pressure at the first-stage pressure measuring hole (2) and the second-stage pressure measuring hole (3) and the flow output by the variable-frequency fan, and transmitting the data to the data conversion and storage module;
The data conversion module and the storage module are connected with the measurement module and are used for acquiring measurement data, processing the data and then sending the processed data to the main control module;
the display module is connected with the main control module and used for displaying the processing data collected by the main control module;
the electric signal processing module is connected with the variable frequency fan and used for monitoring and acquiring the electric signal change of the variable frequency fan during working and inputting the electric signal into the manual adjustment module;
The manual adjustment module is connected with the electric signal processing module, and adjusts various outputs of the variable frequency fan through intervention of the manual adjustment module when electric signal data of the variable frequency fan are abnormal or do not meet the requirements, and transmits the data to the main control module.
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| CN202410265458.3A CN118002330A (en) | 2024-03-08 | 2024-03-08 | Rapid sorting device and method for light matter evidence in fire scene and control system thereof |
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| CN202410265458.3A CN118002330A (en) | 2024-03-08 | 2024-03-08 | Rapid sorting device and method for light matter evidence in fire scene and control system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118408866A (en) * | 2024-07-02 | 2024-07-30 | 山东科技大学 | Dust settling characteristic experiment system and method based on cyclone separation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118408866A (en) * | 2024-07-02 | 2024-07-30 | 山东科技大学 | Dust settling characteristic experiment system and method based on cyclone separation |
| CN118408866B (en) * | 2024-07-02 | 2024-09-10 | 山东科技大学 | Dust settling characteristic experiment system and method based on cyclone separation |
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