Pneumatic conveying separator and separation method

Abstract

The invention discloses a pneumatic conveying separator and a separation method. A pneumatic conveying separator comprises a signal receiving and analyzing control system, a material conveying mechanism, the material conveying mechanism comprises a feed conveying pipe, a feeder, a three-stage separator, an air compressor, a main air duct and a discharge conveying pipe, the air compressor is electrically connected to the signal receiving and analyzing control system, the feed conveying pipe is fixedly connected to one side of the three-stage separator, one end of the three-stage separator is connected to the air compressor through a return air duct, the air compressor is connected to the main air duct through an air inlet pipe, the main air duct is fixedly connected to one side of the feeder, one end of the feeder is fixedly connected to the three-stage separator, and the other side of the feeder is fixedly connected to the discharge conveying pipe; a pneumatic conveying separator separation method comprises primary separation, secondary dust removal, three-stage purification and material conveying steps, the three-stage separation can effectively remove dust in the pneumatic conveying pipe and reduce the possibility of dust explosion in the pipeline.

Description

Technical Field

[0001] The invention relates to the field of material transportation, in particular to a pneumatic conveying separator and a separation method. Background Art

[0002] As a closed conveying system, the pneumatic conveying system uses the energy of airflow to transport granular materials along the direction of airflow in a closed pipe. It has the advantages of good working environment and convenient layout. It is often used in the field of conveying granular materials such as food, plastics, and medicines.

[0003] However, during the pneumatic transportation of granular materials, as the particles rub and collide with the pipe wall and between particles, the particles are broken or worn. At the same time, since the granular materials themselves contain impurities, powder particles will appear. During long-term transportation, the concentration of powder particles in the flow field of the pneumatic conveying system gradually increases. High-concentration combustible powder particles encounter heat sources (open flames or high temperatures) within a certain range, and the flames instantly spread throughout the mixed dust space. The chemical reaction speed is extremely fast, and a large amount of heat is released at the same time, forming very high temperatures and pressures. The energy of the system is converted into mechanical energy and radiation of light and heat, which has a strong destructive power, thus affecting the reliability and safety of the pneumatic conveying system. Therefore, people need a pneumatic conveying separator and separation method to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a pneumatic conveying separator and a separation method to solve the problems in the prior art.

[0005] To achieve the above-mentioned objectives, the present invention provides a pneumatic conveying separator, including a signal receiving and analyzing control system, which is a pneumatic conveying booster separator, including a material conveying mechanism, wherein the material conveying mechanism includes a feed conveying pipe, a feeder, a three-stage separator, an air compressor, a main air duct and a discharge conveying pipe, wherein the air compressor is electrically connected to the signal receiving and analyzing control system, the feed conveying pipe is fixedly connected to one side of the three-stage separator, one end of the three-stage separator is connected to the air compressor through a return air duct, the air compressor is connected to the main air duct through an air inlet pipe, the main air duct is fixedly connected to one side of the feeder, one end of the feeder is fixedly connected to the three-stage separator, and the other side of the feeder is fixedly connected to the discharge conveying pipe.

[0006] Furthermore, the three-stage separator includes a primary separation mechanism, a secondary dust removal mechanism and a third purification mechanism. The primary separation mechanism includes a pot-shaped shell, a material inlet is opened in the middle of the pot-shaped shell, the material inlet is connected to the feed conveying pipe, and a cover plate is fixedly connected to the top of the pot-shaped shell. The secondary dust removal mechanism includes a plurality of blades and a conical tube. The cover plate is fixedly connected to the blades, and the gaps between two adjacent groups of blades are matched. The blades are fixedly connected to the conical tube, and the gaps between the conical tube and the inner wall of the pot-shaped shell are matched. The third purification mechanism includes a filter, the filter is fixedly connected to the cover plate, the air inlet end of the filter is located in the conical tube, the air outlet end of the filter is connected to the return air duct, and a feed port is provided at the bottom of the pot-shaped shell, and the feed port is connected to the feeder.

[0007] Furthermore, the cross-section of the pot-shaped shell includes a pot neck section, an arc section and an oblique line section which are smoothly transitioned in sequence, the diameter of the pot neck section is smaller than the diameter of the arc section, and the oblique line section is arranged along the tangent direction of the bottom end of the arc section.

[0008] Furthermore, the filter includes a filter element housing and a ceramic filter element. The filter element housing is detachably connected to the ceramic filter element, which can make the ceramic filter element easy and quick to replace. The filter element housing is fixedly connected to the cover plate to ensure the sealing inside the pot-shaped shell, so that the rising flow field enters the return air duct entirely through the filter.

[0009] Furthermore, an arc-shaped groove is provided at the bottom of the ceramic filter element, which can reduce the number of times the ceramic filter element needs to be replaced and improve dust removal efficiency.

[0010] Furthermore, an air distribution valve is fixedly installed between the air inlet pipe and the main air duct, and an auxiliary cyclone is fixedly installed between the discharge end of the feeder and the discharge conveying pipe. The air distribution valve and the auxiliary cyclone are connected through the auxiliary air duct. The air distribution valve can reasonably distribute the air provided by the air compressor. The auxiliary cyclone can increase the transport speed of the particulate material of the feeder and prevent the particulate material in the feeder from being blocked.

[0011] Furthermore, the main air duct is provided with a main wind electric-controlled flow meter and a main air duct pressure sensor, the main air duct pressure sensor is located between the main wind electric-controlled flow meter and the feeder, the main wind electric-controlled flow meter and the main air duct pressure sensor are both electrically connected to the signal receiving and analyzing control system, the feed conveying pipe is provided with a conveying pipe pressure sensor, the conveying pipe pressure sensor is electrically connected to the signal receiving and analyzing control system, the return air duct is provided with a return air duct pressure sensor, the return air duct pressure sensor is electrically connected to the signal receiving and analyzing control system, the auxiliary air duct is provided with an auxiliary wind electric-controlled flow meter and an auxiliary wind The auxiliary air duct pressure sensor is located between the auxiliary air electric-controlled flowmeter and the auxiliary cyclone. The auxiliary air electric-controlled flowmeter and the auxiliary air duct pressure sensor are both electrically connected to the signal receiving and analyzing control system. A conveying pipe pressure sensor is provided on the feed conveying pipe to detect the particle conveying situation, thereby controlling the particle material conveying speed. The signal receiving and analyzing control system controls the opening and closing degree of the main wind electric-controlled flowmeter and the auxiliary wind electric-controlled flowmeter after calculation through the pressure values ​​fed back by the main air duct pressure sensor and the auxiliary air duct pressure sensor, and adjusts the transportation speed of the particle material by reasonably distributing the air flow.

[0012] A pneumatic conveying separator, including a signal receiving and analyzing control system, is a pneumatic conveying pressurized separator, including a material conveying mechanism, the material conveying mechanism includes a feed conveying pipe, a feeder, a three-stage separator, an air compressor, a main air duct and a discharge conveying pipe, the air compressor is electrically connected to the signal receiving and analyzing control system, the three-stage separator includes a pot-shaped shell, the pot-shaped shell includes a pot neck section, an arc section and an oblique line section fixedly connected in sequence, the diameter of the pot neck section is smaller than the diameter of the arc section, the oblique line section is arranged along the tangent direction of the bottom end of the arc section, a material inlet is opened in the middle of the pot-shaped shell, the material inlet is connected to the feed conveying pipe, the pot A cover plate is fixedly connected to the top of the pot-shaped shell, and a plurality of blades are fixedly installed on the bottom end of the cover plate in the circumferential direction, and two adjacent groups of blades are gap-matched. A conical tube is fixedly connected to the bottom end of the blade, and the conical tube is gap-matched with the inner wall of the pot-shaped shell. A filter is installed on the cover plate, and the filter comprises a filter element shell and a ceramic filter element. An arc-shaped groove is provided at the bottom of the ceramic filter element, and the filter element shell is detachably connected to the ceramic filter element. The filter element shell is fixedly connected to the cover plate, and the air inlet end of the filter is located in the conical tube, and the air outlet end of the filter is connected to the return air duct. A feed port is provided at the bottom end of the pot-shaped shell, and the feed port is communicated with the feeder, and the feed conveying pipe is connected to the three The air compressor is connected to the main air duct through an air inlet duct, and an air distribution valve is fixedly installed between the air inlet duct and the main air duct. An auxiliary cyclone is fixedly installed between the discharge end of the feeder and the discharge conveying pipe. The air distribution valve is communicated with the auxiliary cyclone through the auxiliary air duct. A main wind electric-controlled flowmeter and a main wind duct pressure sensor are arranged on the main wind duct. The main wind duct pressure sensor is located between the main wind electric-controlled flowmeter and the feeder. Both the main wind electric-controlled flowmeter and the main wind duct pressure sensor are electrically connected to the signal receiving and analyzing control system. The delivery pipe pressure sensor is electrically connected to the signal receiving and analyzing control system. The return air duct is provided with a return air duct pressure sensor, and the return air duct pressure sensor is electrically connected to the signal receiving and analyzing control system. The auxiliary air duct is provided with an auxiliary air electric-controlled flowmeter and an auxiliary air duct pressure sensor. The auxiliary air duct pressure sensor is located between the auxiliary air electric-controlled flowmeter and the auxiliary cyclone. Both the auxiliary air electric-controlled flowmeter and the auxiliary air duct pressure sensor are electrically connected to the signal receiving and analyzing control system. The main air duct is fixedly connected to one side of the feeder, one end of the feeder is fixedly connected to the three-stage separator, and the other side of the feeder is fixedly connected to the discharge delivery pipe.

[0013] A pneumatic conveying separator separation method is a pneumatic conveying separator pressurization separation method, comprising the following steps:

[0014] S1: Primary separation: The granular material is fed into the three-stage separator through the feed conveying pipe. The return air pipe connected to the air compressor on the top of the three-stage separator extracts the air in the pot-shaped shell. The large granular material settles on the inner wall of the pot-shaped shell and enters the feeder through the discharge port.

[0015] S2: Secondary dust removal: small particles enter the conical tube through the blades under the action of the air compressor, and settle into the discharge port through the conical tube;

[0016] S3: Three-stage purification: Dust moves to the return air duct along the flow field, is purified by the ceramic filter element, and the remaining air returns to the air compressor through the return air duct;

[0017] S4: Material transportation: After the granular materials are separated into three stages, the large granular materials and the small granular materials enter the feeder through the discharge port and are pneumatically transported to the discharge conveying pipe.

[0018] Furthermore, the signal receiving and analyzing control system controls the motor speed of the air compressor by obtaining the pipeline pressure values ​​of the delivery pipe pressure sensor, the auxiliary air duct pressure sensor, and the return air duct pressure sensor. At the same time, it can control the opening and closing degrees of the main wind electric-controlled flowmeter and the auxiliary wind electric-controlled flowmeter to adjust the pressure in the pipeline.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: a pneumatic conveying separator and separation method provided by the present invention generates an internal rotating flow field through a pot-shaped shell, and utilizes an air compressor in conjunction with a return air duct, the return air duct is in a negative pressure state, and light dust adheres to the filter, thereby effectively removing dust in the pneumatic conveying pipe and reducing the possibility of dust explosion in the pipeline; the signal receiving and analysis control system detects filter blockage in real time during pneumatic conveying, and the filter replacement is simple and quick, reducing technical costs; the pneumatic conveying system can perform secondary pressurized conveying on the material in the pneumatic conveying pipe without introducing new fluid, thereby improving the reliability and safety of pneumatic conveying. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a material conveying mechanism of a pneumatic conveying separator;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of a three-stage separator of a pneumatic conveying separator;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of a three-stage separator of a pneumatic conveying separator;

[0023] Figure 4 A schematic diagram of a three-stage separation process of a pneumatic conveying separation method.

[0024] In the figure: 1-three-stage separator, 2-return air duct pressure sensor, 3-air compressor, 4-signal receiving and analysis control system, 5-conveying pipe pressure sensor, 6-air distribution valve, 7-auxiliary air electric control flow meter, 8-auxiliary air duct pressure sensor, 9-main air electric control flow meter, 10-main air duct pressure sensor, 11-feeder, 12-auxiliary cyclone, 13-feeding conveying pipe, 14-discharging conveying pipe, 15-inlet pipe, 16-main air duct, 17-auxiliary air duct, 18-return air duct, 1-1-conical pipe, 1-2-blade, 1-3-filter, 1-31-filter element housing, 1-32-ceramic filter element, 1-5-cover plate, 1-6-pot-shaped housing, 1-61-pot neck section, 1-62-arc section, 1-63-oblique line section, 1-7-material inlet, 1-8-feeding port. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments is not specified, they are all conventional products that can be purchased commercially.

[0026] Example: conveying coal particles, the particle size range of the conveyed particle material is 5~30mm, the particle size of the large particle material is 5~30mm, the mass of the large particle material is 100mg~50g, the particle size of the small particle material is 1~5mm, the mass of the small particle material is 10~100mg, and the dust is less than 1 mm. Figure 1 As shown, a pneumatic conveying separator includes a signal receiving and analysis control system 4, the signal receiving system is: Chengke CT9204 four-channel signal measuring instrument, the analysis control system is: PLC control system, a pneumatic conveying separator is a pneumatic conveying booster separator, including a material conveying mechanism, the material conveying mechanism includes a feed conveying pipe 13, a feeder 11, a three-stage separator 1, an air compressor 3, a main air duct 16 and a discharge conveying pipe 14, the air compressor 3 is electrically connected to the signal receiving and analysis control system 4, the feed conveying pipe 13 is fixedly connected to one side of the three-stage separator 1, one end of the three-stage separator 1 is connected to the air compressor 3 through the return air duct 18, the air compressor 3 is connected to the main air duct 16 through the air inlet pipe 15, the main air duct 16 is fixedly connected to one side of the feeder 11, one end of the feeder 11 is fixedly connected to the three-stage separator 1, and the other side of the feeder 11 is fixedly connected to the discharge conveying pipe 14.

[0027] like Figure 2 and Figure 3As shown, the three-stage separator 1 includes a primary separation mechanism, a secondary dust removal mechanism and a third purification mechanism. The primary separation mechanism includes a pot-shaped shell 1-6. A material inlet 1-7 is opened in the middle of the pot-shaped shell 1-6. The material inlet 1-7 is connected to the feed conveying pipe 13. A cover plate 1-5 is fixedly connected to the top of the pot-shaped shell 1-6. The secondary dust removal mechanism includes a plurality of blades 1-2 and a conical tube 1-1. The cover plate 1-5 is fixedly connected to the blades 1-2. The gaps between two adjacent groups of blades 1-2 are matched. The spacing between two adjacent groups of blades 1-2 is 10~30mm. Different blade spacings can control the entry of granular materials of different particle sizes. The minimum spacing is the minimum spacing for entering the cone. The spacing is 3-5 times the particle size of the particulate material in the conical tube. If the spacing is less than 3 times the particle size of the particulate material, small particles are easily blocked between the blades. If the spacing is too large, some dust particles will overflow and it is difficult to collect them effectively. The blades 1-2 are fixedly connected to the conical tube 1-1, and the conical tube 1-1 is matched with the inner wall gap of the pot-shaped shell 1-6. The three-stage purification mechanism includes a filter 1-3, and the filter 1-3 is fixedly connected to the cover plate 1-5. The air inlet end of the filter 1-3 is located in the conical tube 1-1, and the air outlet end of the filter 1-3 is connected to the return air duct 18. A discharge port 1-8 is provided at the bottom of the pot-shaped shell 1-6, and the discharge port 1-8 is connected to the feeder 11.

[0028] The cross section of the pot-shaped shell 1-6 includes a pot neck section 1-61, an arc section 1-62 and an oblique line section 1-63 which are smoothly connected in sequence. The diameter of the pot neck section 1-61 is smaller than the diameter of the arc section 1-62. The oblique line section 1-63 is arranged along the tangent direction of the bottom end of the arc section 1-62. The highest point of the arc section 1-62 is higher than the lowest point of the pot neck section 1-31, which can prevent the granular materials entering the pot-shaped shell 1-6 from colliding with the pot neck section 1-61.

[0029] In the material conveying mechanism, when the diameter of the conveying pipe is 80mm, the radius of the arc segment 1-62 is 200mm;

[0030] When the diameter of the conveying pipeline is 100mm, the radius of the arc segment 1-62 is 250mm;

[0031] When the diameter of the conveying pipeline is 125mm, the radius of the arc segment 1-62 is 300mm.

[0032] The filter 1-3 includes a filter element housing 1-31 and a ceramic filter element 1-32. The filter element housing 1-31 is detachably connected to the ceramic filter element 1-32, and the filter element housing 1-31 is fixedly connected to the cover plate 1-5.

[0033] An arc-shaped groove is provided at the bottom of the ceramic filter element 1-32, which can increase the filtering area of ​​the ceramic filter element 1-32, thereby increasing the air flow speed and the particle dust adhesion area.

[0034] An air distribution valve 6 is fixedly installed between the air inlet pipe 15 and the main air pipe 16 , an auxiliary cyclone 12 is fixedly installed between the discharge end of the feeder 11 and the discharge conveying pipe 14 , and the air distribution valve 6 is connected to the auxiliary cyclone 12 through the auxiliary air pipe 17 .

[0035] The main air duct 16 is provided with a main air electric-controlled flowmeter 9 and a main air duct pressure sensor 10. The electric-controlled flowmeter uses the British KINETROL electric-controlled pneumatic flow control valve, and the pressure sensor uses the American control pressure transmitter SUP-P300. The main air duct pressure sensor 10 is located between the main air electric-controlled flowmeter 9 and the feeder 11. The main air electric-controlled flowmeter 9 and the main air duct pressure sensor 10 are both electrically connected to the signal receiving and analyzing control system 4. The feed conveying pipe 13 is provided with a conveying pipe pressure sensor 5, and the conveying pipe pressure sensor 5 is electrically connected to the signal receiving and analyzing control system 4. The return air duct 18 is provided with a return air duct pressure sensor 2, and the return air duct pressure sensor 2 is electrically connected to the signal receiving and analyzing control system 4. Then, the signal receiving and analyzing control system 4 can determine whether the ceramic filter element 1-32 in the return air duct 18 is blocked through the data fed back by the return air duct pressure sensor 2. The auxiliary air duct 17 is provided with an auxiliary air electric-controlled flowmeter 7 and an auxiliary air duct pressure sensor 8. The auxiliary air duct pressure sensor 8 is located between the auxiliary air electric-controlled flowmeter 7 and the auxiliary cyclone 12. The auxiliary air electric-controlled flowmeter 7 and the auxiliary air duct pressure sensor 8 are both electrically connected to the signal receiving and analyzing control system 4. The signal receiving and analyzing control system 4 controls the opening and closing degree of the main wind electric-controlled flowmeter 9 and the auxiliary air duct electric-controlled flowmeter 7 after calculation through the obtained signal values ​​of the main air duct pressure sensor 10 and the auxiliary air duct pressure sensor 8, so as to improve the transportation speed of the particulate material by reasonably distributing the air flow.

[0036] A pneumatic conveying separator, including a signal receiving and analyzing control system 4, is a pneumatic conveying pressurized separator, including a material conveying mechanism, the material conveying mechanism includes a feed conveying pipe 13, a feeder 11, a three-stage separator 1, an air compressor 3, a main air duct 16 and a discharge conveying pipe 14, the air compressor 3 is electrically connected to the signal receiving and analyzing control system 4, the three-stage separator 1 includes a pot-shaped shell 1-6, the pot-shaped shell 1-6 includes a pot neck section 1-61, an arc section 1-62 and an oblique line section 1-63 fixedly connected in sequence, the diameter of the pot neck section 1-61 is smaller than the diameter of the arc section 1-62, the oblique line section 1-63 is arranged along the tangent direction of the bottom end of the arc section 1-62, a material inlet 1-7 is opened in the middle of the pot-shaped shell 1-6, and the material The inlet 1-7 is connected to the feed conveying pipe 13, the top of the pot-shaped shell 1-6 is fixedly connected to a cover plate 1-5, and a plurality of blades 1-2 are fixedly installed on the bottom of the cover plate 1-5 in a circumferential direction. Two adjacent groups of blades 1-2 are gap-matched, and the bottom of the blades 1-2 is fixedly connected to a conical tube 1-1, and the conical tube 1-1 is gap-matched with the inner wall of the pot-shaped shell 1-6. A filter 1-3 is installed on the cover plate 1-5, and the filter 1-3 includes a filter element shell 1-31 and a ceramic filter element 1-32. An arc-shaped groove is provided at the bottom of the ceramic filter element 1-32, and the filter element shell 1-31 is detachably connected to the ceramic filter element 1-32. The filter element shell 1-31 is fixedly connected to the cover plate 1-5, and the air inlet end of the filter 1-3 is located in the conical tube 1-1. The air outlet of the filter 1-3 The air end is connected to the return air duct 18, and a discharge port 1-8 is provided at the bottom end of the pot-shaped shell 1-6. The discharge port 1-8 is connected to the feeder 11, and the feed conveying pipe 13 is fixedly connected to one side of the three-stage separator 1. One end of the three-stage separator 1 is connected to the air compressor 3 through the return air duct 18. The air compressor 3 is connected to the main air duct 16 through the air inlet pipe 15. An air distribution valve 6 is fixedly installed between the air inlet pipe 15 and the main air duct 16. An auxiliary cyclone 12 is fixedly installed between the discharge end of the feeder 11 and the discharge conveying pipe 14. The air distribution valve 6 is connected to the auxiliary cyclone 12 through the auxiliary air duct 17. The main air duct 16 is provided with a main wind electric-controlled flowmeter 9 and a main air duct pressure sensor 10. The main air duct pressure sensor 10 is located between the main wind electric-controlled flowmeter 9 and the feeder 11 The main wind electric-controlled flowmeter 9 and the main air duct pressure sensor 10 are both electrically connected to the signal receiving and analyzing control system 4; the feed conveying pipe 13 is provided with a conveying pipe pressure sensor 5, which is electrically connected to the signal receiving and analyzing control system 4; the return air duct 18 is provided with a return air duct pressure sensor 2, which is electrically connected to the signal receiving and analyzing control system 4; the auxiliary air duct 17 is provided with an auxiliary wind electric-controlled flowmeter 7 and an auxiliary air duct pressure sensor 8, which is located between the auxiliary wind electric-controlled flowmeter 7 and the auxiliary cyclone 12, and the auxiliary wind electric-controlled flowmeter 7 and the auxiliary air duct pressure sensor 8 are both electrically connected to the signal receiving and analyzing control system 4; the main air duct 16 is fixedly connected to one side of the feeder 11,One end of the feeder 11 is fixedly connected to the three-stage separator 1, and the other end of the feeder 11 is fixedly connected to the discharge conveying pipe 14.

[0037] like Figure 4 As shown, a pneumatic conveying separator separation method is a pneumatic conveying separator pressurization separation method, comprising the following steps:

[0038] S1: primary separation: the granular material is fed into the three-stage separator 1 through the feed conveying pipe 13, the return air pipe 18 connected to the air compressor 3 at the top of the three-stage separator 1 extracts the air in the pot-shaped shell 1-6, and the large granular material is precipitated on the inner wall of the pot-shaped shell 1-6 and enters the feeder 11 through the discharge port 1-8;

[0039] S2: Secondary dust removal: small particles enter the conical tube 1-1 through the blades 1-2 under the action of the air compressor 3, and are precipitated from the conical tube 1-1 into the discharge port 1-8;

[0040] S3: Three-stage purification: dust moves to the return air duct 18 along the flow field, is purified by the ceramic filter element 1-32, and the remaining air returns to the air compressor 3 through the return air duct 18;

[0041] S4: Material conveying: After the granular material is separated into three stages, the large granular material and the small granular material enter the feeder through the discharge port and are pneumatically conveyed to the discharge conveying pipe 14.

[0042] The signal receiving and analyzing control system 4 controls the motor speed of the air compressor 3 by obtaining the pipeline pressure values ​​of the delivery pipe pressure sensor 5, the auxiliary air pipe pressure sensor 8, and the return air pipe pressure sensor 2. At the same time, it can control the opening and closing degrees of the main wind electric-controlled flowmeter 9 and the auxiliary wind electric-controlled flowmeter 7 to adjust the pressure in the pipeline.

[0043] The working principle of the present invention is: when it is necessary to carry out three-stage separation and dust removal of materials, the air compressor 3 starts to work, and the air compressor 3 draws air from the return air duct 18, thereby drawing air from the three-stage separator 1. The air inlet pipe 15 of the air compressor 3 disperses the output air under the action of the air distribution valve 6 so that it enters the main air duct 16 and the auxiliary air duct 17. The particulate material is transported to the three-stage separator 1 by the feed conveying pipe 13, and an internal rotating flow field is generated through the pot-shaped shell 1-6 of the three-stage separator 1. The particulate material with a large particle size is precipitated on the inner wall of the pot-shaped shell 1-6 due to its own heavy weight and falls into the feeder 11 through the discharge port 1-8. The particles with a smaller particle size rise with the flow field and enter the conical tube 1-1 under the obstruction of the blades 1-2. The conical tube The flow field inside 1-1 is smaller than that inside the pot-shaped shell 1-6. Particles with smaller particle sizes further settle in the conical tube 1-1, slide into the discharge port 1-8 and enter the feeder 11. The particulate material enters the auxiliary cyclone 12 under the action of the airflow in the main air duct 16 connected to the feeder 11, and is further accelerated by the airflow in the auxiliary air duct 17 connected to the auxiliary cyclone 12, and then enters the discharge conveying pipe 14. The remaining dust continues to rise with the flow field, contacts the filter 1-3, and is purified by the ceramic filter element 1-32 in the filter 1-3. The dust is blocked by the ceramic filter element 1-32 and adheres to the ceramic filter element 1-32, and the remaining air passing through the ceramic filter element 1-32 enters the air compressor 3 through the return air duct 18.

[0044] The signal receiving and analyzing control system 4 is responsible for detection, and the signal values ​​of the delivery pipe pressure sensor 5, the main air duct pressure sensor 10 and the auxiliary air duct pressure sensor 8 are obtained through the signal receiving and analyzing control system 4. After processing the obtained signal values, the signal receiving and analyzing control system 4 controls the opening and closing degree of the main wind electric-controlled flowmeter 9 and the auxiliary wind electric-controlled flowmeter 7, thereby controlling the air flow entering the main air duct 16 and the auxiliary air duct 17 from the air inlet pipe.

[0045] When the absolute value of the negative pressure value measured by the return air duct pressure sensor 2 obtained by the signal receiving and analyzing control system 4 is small, the signal receiving and analyzing control system 4 controls the motor speed of the air compressor 3 to increase to enhance the negative pressure value in the return air duct 18 .

[0046] When the absolute value of the negative pressure value measured by the return air duct pressure sensor 2 obtained by the signal receiving and analyzing control system 4 is large, the signal receiving and analyzing control system 4 controls the motor speed of the air compressor 3 to decrease to reduce energy consumption.

[0047] When the motor speed of the air compressor 3 decreases, and the absolute value of the negative pressure value measured by the return air duct pressure sensor 2 obtained by the signal receiving and analyzing control system 4 remains unchanged or changes slowly and remains at a large value, it indicates that the dust has blocked or is close to blocking the ceramic filter element 1-32. At this time, the air compressor 3 is controlled to stop working, and the return air duct 18 on the filter 1-3 is disassembled. After the return air duct 18 is disassembled, the ceramic filter element 1-32 in the filter 1-3 is taken out and replaced.

[0048] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit and essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0049] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pneumatic conveying separator, comprising a signal receiving and analyzing control system (4), characterized in that: A pneumatic conveying pressurized separator comprises a material conveying mechanism, the material conveying mechanism comprising a feed conveying pipe (13), a feeder (11), a three-stage separator (1), an air compressor (3), a main air duct (16) and a discharge conveying pipe (14), the air compressor (3) being electrically connected to the signal receiving and analyzing control system (4), the feed conveying pipe (13) being fixedly connected to one side of the three-stage separator (1), one end of the three-stage separator (1) being connected to the air compressor (3) via a return air duct (18), the air compressor (3) being connected to the main air duct (16) via an air inlet pipe (15), the main air duct (16) being fixedly connected to one side of the feeder (11), one end of the feeder (11) being fixedly connected to the three-stage separator (1), and the other side of the feeder (11) being fixedly connected to the discharge conveying pipe (14); The three-stage separator (1) comprises a primary separation mechanism, a secondary dust removal mechanism and a tertiary purification mechanism; The first-stage separation mechanism comprises a pot-shaped outer shell (1-6), the pot-shaped outer shell (1-6) comprising a pot neck section (1-61), an arc section (1-62) and an oblique line section (1-63) which are fixedly connected in sequence, the diameter of the pot neck section (1-61) is smaller than the diameter of the arc section (1-62), and the oblique line section (1-63) is arranged along the tangent direction of the bottom end of the arc section (1-62); a material inlet (1-7) is provided in the middle of the pot-shaped outer shell (1-6), the material inlet (1-7) is connected to a material feeding conveying pipe (13), and a cover plate (1-5) is fixedly connected to the top end of the pot-shaped outer shell (1-6); The secondary dust removal mechanism comprises a plurality of blades (1-2) and a conical tube (1-1); the plurality of blades (1-2) are fixedly mounted circumferentially on the bottom end of the cover plate (1-5); two adjacent groups of blades (1-2) are clearance-matched; the bottom ends of the blades (1-2) are fixedly connected to the conical tube (1-1); and the conical tube (1-1) and the inner wall of the pot-shaped outer shell (1-6) are clearance-matched; The three-stage purification mechanism comprises a filter (1-3), the filter (1-3) is fixedly connected to the cover plate (1-5), the filter (1-3) comprises a filter core housing (1-31) and a ceramic filter core (1-32), an arc-shaped groove is provided at the bottom of the ceramic filter core (1-32), the filter core housing (1-31) and the ceramic filter core (1-32) are detachably connected, the filter core housing (1-31) and the cover plate (1-5) are fixedly connected, the air inlet end of the filter (1-3) is located in the conical tube (1-1), the air outlet end of the filter (1-3) is connected to the return air duct (18), and the bottom end of the pot-shaped housing (1-6) is provided with a feed port (1-8), and the feed port (1-8) is connected to the feeder (11); An air distribution valve (6) is fixedly installed between the air inlet pipe (15) and the main air pipe (16); an auxiliary cyclone (12) is fixedly installed between the discharge end of the feeder (11) and the discharge conveying pipe (14); the air distribution valve (6) and the auxiliary cyclone (12) are connected through the auxiliary air pipe (17); a main air electric-controlled flow meter (9) and a main air pipe pressure sensor (10) are arranged on the main air pipe (16); the main air pipe pressure sensor (10) is located between the main air electric-controlled flow meter (9) and the feeder (11); the main air electric-controlled flow meter (9) and the main air pipe pressure sensor (10) are both electrically connected to the signal receiving and analyzing control system (4); the feed conveying pipe A delivery pipe pressure sensor (5) is arranged on the auxiliary air duct (13), and the delivery pipe pressure sensor (5) is electrically connected to the signal receiving and analyzing control system (4). A return air duct pressure sensor (2) is arranged on the return air duct (18), and the return air duct pressure sensor (2) is electrically connected to the signal receiving and analyzing control system (4). An auxiliary air duct (17) is arranged with an auxiliary air electric-controlled flow meter (7) and an auxiliary air duct pressure sensor (8), and the auxiliary air duct pressure sensor (8) is located between the auxiliary air electric-controlled flow meter (7) and the auxiliary cyclone (12), and both the auxiliary air electric-controlled flow meter (7) and the auxiliary air duct pressure sensor (8) are electrically connected to the signal receiving and analyzing control system (4).

2. A pneumatic conveying separator separation method according to the separator of claim 1, characterized in that: A pneumatic conveying separator pressurization separation method comprises the following steps: S1: primary separation: the granular material is fed into the three-stage separator (1) through the feed conveying pipe (13); the top of the three-stage separator (1) is connected to the return air pipe (18) of the air compressor (3) to extract the air in the pot-shaped shell (1-6); the large granular material is precipitated on the inner wall of the pot-shaped shell (1-6) and enters the feeder (11) through the discharge port (1-8); S2: Secondary dust removal: small particles enter the conical tube (1-1) through the blades (1-2) under the action of the air compressor (3), and are precipitated from the conical tube (1-1) into the discharge port (1-8); S3: three-stage purification: the dust moves along the flow field to the return air duct (18), is purified by the ceramic filter element (1-32), and the remaining air returns to the air compressor (3) through the return air duct (18); S4: Material conveying: After the granular material is separated into three stages, the large granular material and the small granular material enter the feeder through the discharge port and are pneumatically conveyed to the discharge conveying pipe (14).

3. A pneumatic conveying separator separation method according to claim 2, characterized in that: The signal receiving and analyzing control system (4) controls the motor speed of the air compressor (3) by obtaining the pipeline pressure values ​​of the delivery pipe pressure sensor (5), the auxiliary air pipe pressure sensor (8), and the return air pipe pressure sensor (2), and can also control the opening and closing degrees of the main wind electric control flow meter (9) and the auxiliary wind electric control flow meter (7) to adjust the pressure in the pipeline.

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