A step-boosted pneumatic ash conveying device

Abstract

The utility model discloses a kind of stepped boost's pneumatic ash conveying device, including material conveying pipeline, the material conveying pipeline is communicated with material storage, the material conveying pipeline is equipped with several bin pumps communicated therewith, the material conveying pipeline includes the inclined pipe section I of conveying material upwards, the inclined pipe section is by the ladder shape of the alternate communication of several horizontal pipe sections II and several inclined pipe sections II is constituted, at least one horizontal pipe section II is equipped with blower, compared with prior art, it can solve the problem of material jamming when ash conveying distance is long and the difference is big in relevant technology.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic ash conveying, and in particular to a stepped-assisted pneumatic ash conveying device. Background Technology

[0002] Pneumatic conveying typically uses positive pressure pushing or negative pressure suction to transport materials. It utilizes silo pumps (feeders, screw pumps, etc.), vacuum pumps, or negative pressure fans as power sources, and leverages the energy of airflow to transport granular materials through closed pipes along the airflow direction. Pneumatic conveying is a specific application of fluidization technology and is widely used in ash removal systems in industries such as thermal power plants, metallurgy, and chemicals. It features simple structure, convenient operation, multi-directional conveying capability, and the ability to perform heating, cooling, and drying operations on materials during the conveying process.

[0003] Existing pneumatic ash conveying systems commonly use compressed air as a power source. For large particles, heavy materials, materials with breakage requirements, or excessively long horizontal conveying distances, boosters need to be added to the pipeline. However, when the ash conveying distance is too long or the drop is too large, relying solely on the compressed air at the source, even with the addition of pipeline boosters, will still result in pipe blockage.

[0004] The utility model patent application CN119117694A, titled "Pneumatic Ash Conveying System Blockage Monitoring System," proposes a method to accurately locate blockages by setting temperature stickers and temperature sensors on the ash conveying pipeline, but does not propose a method to avoid blockages or a blockage-clearing measure. The utility model patent application CN120024709A, titled "A Pneumatic Ash Conveying System and Its Usage Method," proposes to use the negative pressure generated by the bypass pipeline connected to the ash hopper to back-pump the conveying pipeline to remove blocked materials, but the effectiveness of this negative pressure back-pumping in clearing blockages needs to be demonstrated. The utility model patent application CN119330082A, titled "Anti-blockage Pneumatic Ash Conveying Device and Its Method," proposes to use the lateral reciprocating movement of a sliding ring and a crushing roller to unclog blocked pipelines and crush materials, but the device has a complex structure and is difficult to replace.

[0005] In summary, existing technologies and methods have not solved the clogging problem in long-distance, high-drop pneumatic ash conveying applications. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the prior art by proposing a stepped-assisted pneumatic ash conveying device that can solve the problem of material blockage when the ash conveying distance is long and the drop is large.

[0007] To achieve the above objectives, this utility model proposes a stepped-assisted pneumatic ash conveying device, including a material conveying pipeline connected to a material storage silo. The material conveying pipeline is equipped with several silo pumps connected to it. The material conveying pipeline includes an inclined pipe section I for conveying material upwards. The inclined pipe section is a stepped structure formed by several horizontal pipe sections II and several inclined pipe sections II connected alternately in sequence. At least one horizontal pipe section II is equipped with a blower.

[0008] Preferably, the horizontal pipe section II and the inclined pipe section II are connected by an arc-shaped elbow, and each horizontal pipe section II is equipped with a blower, which is located near the output end of the horizontal pipe section II.

[0009] Preferably, the angle between the horizontal pipe section II and the inclined pipe section II is 120~150°.

[0010] Preferably, the material conveying pipeline also includes a horizontal pipe section I connected to the inclined pipe section I, and the silo pump is connected in sequence through the horizontal pipe section I. The top of the silo of the silo pump is connected to the corresponding cone hopper in sequence through an expansion joint, a reducing short section, and a feed valve.

[0011] Preferably, the front end of the horizontal pipe section I is connected to the compressed air pipeline through the main booster pipe, and all the silos are connected to the compressed air pipeline through the fluidizing air pipeline. Each silo is equipped with a fluidizing plate covering the output end of the fluidizing air pipeline. Each horizontal pipe section I on the ash outlet side of the silo pump is equipped with an air blower, and each air blower is connected to the compressed air pipeline through an air blower pipeline. Each of the main booster pipe, the fluidizing air pipeline, and the air blower pipeline is equipped with an air inlet valve.

[0012] Preferably, the top of the silo is connected to the corresponding cone hopper via an exhaust pipe, and the exhaust pipe is equipped with an exhaust valve.

[0013] Preferably, a double gate valve and a second pressure gauge are sequentially installed on the rear end of the horizontal pipe section I on the ash outlet side of the silo pump.

[0014] Preferably, the horizontal pipe section I between the second pressure gauge and the ash outlet is connected to the cone at the rear via a clearing and return pipe, and the clearing and return pipe is equipped with a drain valve.

[0015] Preferably, the silo is equipped with a discharge valve at the discharge port and a first pressure gauge at the bottom.

[0016] The beneficial effects of this utility model are as follows: First, by designing a multi-stage stepped inclined pipe section I, the resistance that materials need to overcome when passing through a vertical pipe is dispersed, enabling materials to be smoothly conveyed pneumatically in scenarios with long distances and large drops with less purging pressure; Second, by designing a multi-stage stepped inclined pipe section I for purging, more efficient unblocking can be achieved when the pipe is blocked.

[0017] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a stepped-assisted pneumatic ash conveying device according to this utility model.

[0019] In the diagram: 1-Feed valve, 2-Reducing section, 3-Expansion joint, 4-Exhaust valve, 5-Blouse pump, 6-Discharge valve, 7-Inlet valve, 8-Blower, 9-Blocking valve, 10-First pressure gauge, 11-Second pressure gauge, 12-Double gate valve, 13-Material storage bin, 14-Conical hopper, 15-Fluidizing plate, 16-Ash outlet, 17-Discharge port, 18-Blouse, G1-Compressed air pipeline, G2-Main booster pipeline, G3-Fluidizing air pipeline, G4-Exhaust pipeline, G5-Material conveying pipeline, G6-Blocking return pipeline, G7-Blowering pipeline, G8-Inclined section II, G9-Horizontal section II, G10-Horizontal section I, G11-Inclined section I. Detailed Implementation

[0020] See Figure 1 This utility model discloses a stepped-assisted pneumatic ash conveying device, including a material conveying pipeline G5, which is connected to a material storage silo 13. The material conveying pipeline G5 is equipped with several silo pumps 5 connected to it. The material conveying pipeline G5 includes an inclined pipe section IG11 for conveying materials upward. The inclined pipe section IG11 is a stepped structure formed by several horizontal pipe sections IIG9 and several inclined pipe sections IIG8 connected alternately in sequence. At least one horizontal pipe section IIG9 is equipped with a blower 8.

[0021] The horizontal pipe section IIG9 and the inclined pipe section IIG8 are connected by an arc-shaped elbow. Each horizontal pipe section IIG9 is equipped with a blower 8, which is located near the output end of the horizontal pipe section IIG9. The included angle between the horizontal pipe section IIG9 and the inclined pipe section IIG8 is 120~150°. The advantage of this is that less gravity needs to be overcome under the same pressure of blower, and the material conveying is smoother.

[0022] The material conveying pipeline G5 also includes a horizontal pipeline IG10 connected to the inclined pipeline IG11. The silo pump 5 is connected in sequence through the horizontal pipeline IG10. The top of the silo 18 of the silo pump 5 is connected to the corresponding cone 14 in sequence through the expansion joint 3, the reducing short section 2, and the feed valve 1. The fluidized material in the silo pump 5 is forced into the material conveying pipeline G5 under pressure, and is conveyed to the material storage silo 13 along the airflow direction under the action of the main booster gas and the auxiliary booster gas.

[0023] The front end of the horizontal pipe section IG10 is connected to the compressed air pipe G1 through the main booster pipe G2. All the silos 18 are connected to the compressed air pipe G1 through the fluidizing air pipe G3. Each silo 18 is equipped with a fluidizing plate 15 covering the output end of the fluidizing air pipe G3 to fluidize the material inside the silo pump 18. Each horizontal pipe section IG10 on the ash outlet 16 side of the silo pump 5 is equipped with a blower 8. Each blower 8 is connected to the compressed air pipe G1 through the blower pipe G7. Each of the main booster pipe G2, the fluidizing air pipe G3 and the blower pipe G7 is equipped with an air inlet valve 7.

[0024] The top of the hopper 18 is connected to the corresponding cone hopper 14 through the exhaust pipe G4. The exhaust pipe G4 is equipped with an exhaust valve 4, which is used to discharge excess air from the hopper pump 5 to prevent excessive pressure in the hopper pump 5, so that the material from the material conveying source cannot smoothly enter the hopper pump 5.

[0025] Finally, a double gate valve 12 and a second pressure gauge 11 are sequentially installed on the rear end of the horizontal pipe section IG10 on the side of the ash outlet 16 of the silo pump 5.

[0026] The horizontal pipe section IG10 between the second pressure gauge 11 and the ash outlet 16 is connected to the last cone 14 through the unblocking return pipe G6. The unblocking return pipe G6 is equipped with a blockage relief valve 9, which is used to close the double gate valve 12 and open the blockage relief valve 9 if the material conveying pipe G5 is blocked, so that the material from the silo pump 5 returns to the cone 14 at the bottom of the material conveying source through the unblocking return pipe G6, thus avoiding the blockage in the material conveying pipe G5 from worsening.

[0027] The discharge port 17 of the silo 18 is equipped with a discharge valve 6, and the lower part of the silo 18 is equipped with a first pressure gauge 10.

[0028] A stepped-assisted pneumatic ash conveying method includes the following steps: The PLC control system automatically identifies the pressure of the second pressure gauge 11. If the pressure value is relatively stable, the air inlet valve 7 on the auxiliary blowing pipe G7 connected to the auxiliary blowing device 8 on the stepped inclined pipe section IG11 is closed. If the pressure value is continuously rising, the air inlet valve 7 on the auxiliary blowing pipe G7 connected to the auxiliary blowing device 8 on the stepped inclined pipe section IG11 is automatically opened to provide auxiliary blowing. When the pressure value is higher than the alarm value, the double gate valve 12 on the horizontal pipe section IG10 is automatically closed, and the blockage discharge valve 9 on the unblocking return pipe G6 is automatically opened to discharge the remaining material in the horizontal pipe section IG10 to the cone hopper 14 at the lower part of the material conveying source, so as to avoid the blockage in the horizontal pipe section IG10 from aggravating. At the same time, the blowing air volume of the auxiliary blowing device 8 on the stepped inclined pipe section IG11 is increased to continue the pipe unblocking operation until the pressure value of the second pressure gauge 11 drops to close to P. L When the automatic unblocking process is completed, the unblocking valve 9 on the unblocking return pipe G6 will automatically close and start the next working cycle.

[0029] Furthermore, in the continuous pipeline unblocking operation described above, the air volume of the air-blowing device 8 on the stepped inclined pipe section IG11 should be increased sequentially from the nearest to the farthest from the material storage silo, rather than increasing the air volume of the air-blowing device 8 on all stepped inclined pipe sections IG11 at the same time.

[0030] Furthermore, if the conveyed material is explosion-proof, nitrogen is used instead of compressed air, and the feed valve 1, exhaust valve 4, discharge valve 6, air inlet valve 7, and plug removal valve 9 are pneumatically operated.

[0031] Feeding process: Feed valve 1 and exhaust valve 4 open in sequence, and the material enters the silo pump 5 until the material in the silo pump 5 reaches the material level or the feeding time reaches the set time, and then feed valve 1 and exhaust valve 4 close automatically in sequence. Fluidization process: The air inlet valve 7 on the fluidization air pipeline G3 is opened, and compressed air enters the silo pump 5, which fluidizes the material inside the silo pump 5. At the same time, the pressure on the first pressure gauge 10 set on the silo pump 5 rises. Conveying process: When the pressure of the first pressure gauge 10 reaches the set upper limit PH, after a few seconds, the air inlet valve 7 on the main booster pipe G2, the discharge valve 6 at the bottom of the silo pump 5, and the double gate valve 12 on the material conveying pipe G5 will open automatically in sequence, and the conveying will begin. Clearing process: When the pressure of the first pressure gauge 10 gradually drops to the set lower limit PL, after a few seconds, the air inlet valve 7 on the main booster pipeline G2, the air inlet valve 7 on the fluidization gas pipeline G3, the discharge valve 6 at the bottom of the silo pump 5, and the double gate valve 12 on the material conveying pipeline G5 will automatically close in sequence, completing one working cycle.

[0032] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A stepped-pump pneumatic ash conveying device, characterized in that: It includes a material conveying pipeline (G5) connected to a material storage silo (13). The material conveying pipeline (G5) is equipped with several silo pumps (5) connected to it. The material conveying pipeline (G5) includes an inclined pipe section I (G11) for conveying materials upward. The inclined pipe section I (G11) is a stepped structure formed by several horizontal pipe sections II (G9) and several inclined pipe sections II (G8) connected alternately in sequence. At least one horizontal pipe section II (G9) is equipped with a blower (8).

2. The stepped-pneumatic ash conveying device as described in claim 1, characterized in that: The horizontal pipe section II (G9) and the inclined pipe section II (G8) are connected by an arc-shaped elbow. Each horizontal pipe section II (G9) is equipped with a blower (8), which is located near the output end of the horizontal pipe section II (G9).

3. The stepped-pneumatic ash conveying device as described in claim 1, characterized in that: The angle between the horizontal pipe section II (G9) and the inclined pipe section II (G8) is 120~150°.

4. The stepped-pneumatic ash conveying device as described in claim 1, characterized in that: The material conveying pipeline (G5) also includes a horizontal pipe section I (G10) connected to the inclined pipe section I (G11). The silo pump (5) is connected in sequence through the horizontal pipe section I (G10). The top of the silo (18) of the silo pump (5) is connected to the corresponding cone hopper (14) in sequence through the expansion joint (3), the reducing short section (2), and the feed valve (1).

5. The stepped-pneumatic ash conveying device as described in claim 4, characterized in that: The front end of the horizontal pipe section I (G10) is connected to the compressed air pipe (G1) through the main booster pipe (G2). The silos (18) are all connected to the compressed air pipe (G1) through the fluidization air pipe (G3). The silos (18) are all equipped with fluidizing plates (15) that cover the output end of the fluidization air pipe (G3). The horizontal pipe section I (G10) on the side of the ash outlet (16) of the silo pump (5) is equipped with a blower (8). The blowers (8) are all connected to the compressed air pipe (G1) through the blower pipe (G7). The main booster pipe (G2), the fluidization air pipe (G3) and the blower pipe (G7) are all equipped with air inlet valves (7).

6. The stepped-pneumatic ash conveying device as described in claim 4, characterized in that: The top of the hopper (18) is connected to the corresponding cone hopper (14) through an exhaust pipe (G4), and an exhaust valve (4) is provided on the exhaust pipe (G4).

7. The stepped-pneumatic ash conveying device as described in claim 4, characterized in that: The horizontal pipe section I (G10) on the ash outlet (16) side of the silo pump (5) mentioned last is equipped with a double gate valve (12) and a second pressure gauge (11) in sequence.

8. The stepped-pneumatic ash conveying device as described in claim 7, characterized in that: The horizontal pipe section I (G10) between the second pressure gauge (11) and the ash outlet (16) is connected to the last cone hopper (14) through the unblocking return pipe (G6), and the unblocking return pipe (G6) is equipped with a drain valve (9).

9. The stepped-assisted pneumatic ash conveying device as described in claim 4, characterized in that: The discharge port (17) of the silo (18) is provided with a discharge valve (6), and the lower part of the silo (18) is provided with a first pressure gauge (10).

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