Powder conveying system with ash removal function

Abstract

The utility model discloses a powder conveying system with an ash removal function, which belongs to the technical field of powder conveying and comprises a fly ash tank, a conveying pipeline and an ash bin, and the conveying pipeline is connected into an unloader of the fly ash tank and communicated with an inlet end at the top end of the ash bin; a blowing system is arranged on one side of the conveying pipeline and comprises an air compression tank and a ventilation pipeline communicated with the air compression tank, the ventilation pipeline is connected with a plurality of high-pressure air branch pipes, each high-pressure air branch pipe is connected into a conducting electric valve, and blowing pipes connected with the pipe wall of the conveying pipeline are arranged at the outlet ends of the high-pressure air branch pipes. The powder conveying system is provided with the purging system in a matched mode, in the powder conveying process or after blockage occurs, the purging system purges the conveying pipeline regularly, fly ash cakes possibly deposited on the inner wall of the conveying pipeline can be damaged quickly and safely, smooth feeding of the powder conveying system is met, and the conveying efficiency is improved. The blockage risk of the conveying pipeline is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of powder conveying, in particular to a powder conveying system with a dust cleaning function. Background Art

[0002] Pneumatic conveying is a method of conveying powdered or granular materials by using airflow (usually air). The pneumatic conveying uses high-pressure wind as the power source, and the materials are transported at high speed in the dilute phase (fluidized state) in the conveying pipeline. It has been widely used in chemical industry, food processing and other fields. At present, there are two main technical solutions for pneumatic conveying of powders: Solution 1: silo + frequency modulation star feeder + pneumatic conveying pipeline. This method adjusts the motor frequency of the star feeder, calculates the feeding amount by the speed, and then introduces compressed air into the pipeline to achieve powder conveying; Solution 2: silo + silo pump + pneumatic conveying pipeline. This method controls the feed valve and discharge valve switch of the silo pump, and then introduces compressed air into the pipeline to achieve intermittent conveying of powder in units of pumps, and achieves the purpose of metered feeding by calculating the number of conveying pumps. Regardless of the conveying method, the entire pneumatic conveying pipeline is in a positive pressure state, and the material is easily discharged along the conveying pipeline. However, during the production process of fly ash, fly ash will clump due to large dust particles and condensation in the air, and settle and clog the wall of the conveying pipeline. In order to smoothly and evenly convey the fly ash to the ash bin, it is necessary to stop the machine for cleaning. Conventional cleaning of the conveying pipeline requires opening the blind plate for manual cleaning, which is time-consuming and laborious and poses a major safety hazard during cleaning. Utility Model Content

[0003] Technical problem to be solved: In view of the problem that pneumatic conveying pipelines in the prior art are prone to blockage, the utility model provides a powder conveying system with a dust cleaning function. The powder conveying system is equipped with a purge system. During the powder conveying process or after blockage occurs, the conveying pipeline is regularly purged by the purge system, which can quickly and safely destroy the fly ash lumps that may be deposited on the inner wall of the conveying pipeline, thereby meeting the smooth feeding of the powder conveying system and reducing the risk of blockage in the conveying pipeline.

[0004] Technical solution: The utility model discloses a powder conveying system with a ash cleaning function, the powder conveying system comprises a fly ash tank, a conveying pipeline and an ash bin, the conveying pipeline is connected to the discharger of the fly ash tank and is connected to the inlet end at the top of the ash bin;

[0005] A purge system is provided on one side of the conveying pipeline, and the purge system includes an air compression tank and a ventilation duct connected to the air compression tank. The ventilation duct is respectively connected to a plurality of high-pressure air branch pipes, each of which is connected to a conduction electric valve, and a blowing pipe connected to the pipe wall of the conveying pipeline is provided at the outlet end of the high-pressure air branch pipe.

[0006] Preferably, the delivery pipeline comprises an air inlet pipe section, a fluidizing pipe section and a delivery pipe section which are connected in sequence;

[0007] The air inlet pipe section is connected to the sorting fan, and a one-way valve is connected to the air inlet pipe section;

[0008] The fluidizing pipe section is fixedly connected to the discharger, and the inlet and outlet ends of the fluidizing pipe section are respectively provided with an air inlet electric valve and a fluidizing electric valve;

[0009] The conveying pipe section comprises a straight pipe section and an angle elbow, and a feed electric valve is connected between the end of the conveying pipe section and the inlet end of the ash bin.

[0010] Preferably, the ventilation duct comprises at least four high-pressure air branch pipes respectively corresponding to the end of the air inlet pipe section, the end of the fluidizing pipe section and the straight pipe sections and corner elbows of the conveying pipe section.

[0011] Preferably, the conveying pipeline, the air compression tank and the ash silo are respectively provided with a pipeline pressure gauge, an air compression tank pressure gauge and an ash silo pressure gauge.

[0012] Preferably, the ash bin comprises a bin body and a conical bin connected to the lower end of the bin body, and the lower end of the conical bin is connected to a discharge pipe and a discharge electric valve.

[0013] Preferably, a support platform is provided on the upper portion of the ash bin, and a plurality of groups of vibration-damping support components fixed on the support platform are provided in the circumferential direction of the bin body. The ash bin is suspended so that the lower end of the discharge pipe can be passed by a material truck.

[0014] Preferably, it also includes a PLC control cabinet, in which a control circuit is integrated, and the control circuit is electrically connected to the conduction electric valve, the air inlet electric valve, the fluidization electric valve, the feed electric valve, and the discharge electric valve respectively.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The powder conveying system of the utility model is equipped with a purge system. During the powder conveying process or after blockage occurs, the conveying pipeline is regularly purged by the purge system, which can quickly and safely destroy fly ash lumps that may be deposited on the inner wall of the conveying pipeline, thereby ensuring smooth feeding of the powder conveying system and reducing the risk of blockage in the conveying pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the layout structure of the powder conveying system of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the layout structure of the conveying pipeline and purge system.

[0019] Figure numerals: 1. powder conveying system; 2. fly ash tank; 21. discharger; 3. conveying pipeline; 31. air inlet pipe section; 32. one-way valve; 33. air inlet electric valve; 34. pipeline pressure gauge; 35. fluidizing pipe section; 36. fluidizing electric valve; 37. conveying pipe section; 38. corner elbow; 39. feed electric valve; 4. ash silo; 41. silo body; 42. conical silo; 43. discharge electric valve; 44. vibration reduction support assembly; 45. safety valve; 46. ash silo pressure gauge; 5. support platform; 6. purge system; 7. air compressor tank; 71. air compressor tank pressure gauge; 8. ventilation duct; 9. electric main valve; 10. high-pressure air branch pipe; 11. conduction electric valve; 12. injection pipe. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the following will be combined with the attached Figure 1~2 The technical scheme of the embodiment of the utility model is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the utility model.

[0021] like Figure 1~2 As shown, the utility model is a powder conveying system with ash cleaning function, the powder conveying system 1 includes a fly ash tank 2, a conveying pipeline 3 and an ash bin 4. The conveying pipeline 3 includes an air inlet pipe section 31, a fluidizing pipe section 35 and a conveying pipe section 37 which are connected in sequence, the air inlet pipe section 31 is connected to the sorting fan, and a one-way valve 32 is connected to the air inlet pipe section 31. The sorting fan provides a pneumatic power source for the conveying pipeline 3, and the one-way valve 32 can limit the dust-containing wind backblowing of the fluidizing pipe section 35. The fluidizing pipe section 35 is fixedly connected with the discharger 21. The discharger 21 can use a frequency-modulated star feeder to realize the unloading function. The inlet electric valve 33 and the fluidizing electric valve 36 are respectively provided at the inlet and outlet ends of the fluidizing pipe section 35. The air inlet electric valve 33 can be turned on to connect the sorting fan. The air volume output by the sorting fan is mixed with the fly ash output by the discharger 21 in the fluidizing pipe section 35 to produce a fluidizing effect. Then, the fluidizing electric valve 36 is started to transport the fly ash in the fluidized state along the conveying pipe section 37 to the ash bin 4 for storage. The conveying pipe section 37 includes a straight pipe section and an angle elbow 38. The number of the straight pipe section and the angle elbow 38 is selected according to the direction of the pipeline. A feed electric valve 39 is connected to the inlet end of the ash bin 4 at the end of the conveying pipe section 37. The feed electric valve 39 can be started to transport the fly ash into the ash bin 4.

[0022] like Figure 2As shown, a purge system 6 is provided on one side of the conveying pipeline 3. The purge system 6 includes an air compression tank 7 and a ventilation pipeline 8 connected to the air compression tank 7. An electric main valve 9 is provided at the front end of the ventilation pipeline 8. The ventilation pipeline 8 is respectively connected to a plurality of high-pressure air branch pipes 10. Each high-pressure air branch pipe 10 is connected to a conductive electric valve 11, and a spray pipe 12 connected to the pipe wall of the conveying pipeline 3 is provided at the outlet end of the high-pressure air branch pipe 10. In a specific embodiment, the ventilation pipeline 8 includes at least four high-pressure air branch pipes 10 corresponding to the end of the air inlet pipe section 31, the end of the fluidizing pipe section 35, and the straight pipe section and the corner elbow 38 of the conveying pipe section 37. The specific setting position of the high-pressure air branch pipe 10 should meet the position where the conveying pipeline 3 is prone to fly ash agglomeration. During the powder conveying process or after blockage, the conveying pipeline is regularly purged by the purge system, which can quickly and safely destroy the fly ash agglomerates that may be deposited on the inner wall of the conveying pipeline, meet the smooth feeding of the powder conveying system, and reduce the risk of clogging of the conveying pipeline.

[0023] like Figure 1~2 As shown, the conveying pipeline 3, the air compression tank 7 and the ash bin 4 are respectively provided with a pipeline pressure gauge 34, an air compression tank pressure gauge 71 and an ash bin pressure gauge 46. The pressure gauges can monitor the pressure of the corresponding working positions in real time to ensure the safe operation of the corresponding devices; the ash bin 4 is also provided with a safety valve 45. If the pressure in the ash bin 4 is too high, the pressure can be relieved through the safety valve 45.

[0024] like Figure 1 As shown, the ash bin 4 includes a bin body 41 and a conical bin 42 connected to the lower end of the bin body 41, and a discharge pipe and a discharge electric valve 43 are connected to the lower end of the conical bin 42. A support platform 5 is arranged on the upper part of the ash bin 4, and a plurality of groups of vibration reduction support components 44 fixed on the support platform 5 are arranged in the circumferential direction of the bin body 41. The vibration reduction support components 44 can adopt a combination of a support foot and a support spring to realize the function of fixed support. The ash bin 4 is suspended in the air through the cooperation of the vibration reduction support components 44 and the support platform 5. The lower end of the discharge pipe of the ash bin 4 can be passed by a material truck. When the material truck is parked under the ash bin 4, the discharge electric valve 43 can be started to discharge the fly ash.

[0025] In the above embodiment, the powder conveying system 1 also includes a PLC control cabinet (not shown in the figure), and the PLC control cabinet is integrated with a control circuit, which is electrically connected to the conduction electric valve 11, the air inlet electric valve 33, the fluidization electric valve 36, the feed electric valve 39, and the discharge electric valve 43, and controls the electric valve to start or close accordingly to achieve smooth transportation of fly ash. The pipeline pressure gauge 34, the air pressure tank pressure gauge 71 and the ash bin pressure gauge 46 can be electronic pressure gauges, and are electrically connected to the control circuit to transmit the pressure data of the corresponding position to the PLC control cabinet for pressure display.

[0026] The above are preferred implementations of the present utility model. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present utility model. These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A powder conveying system with dust cleaning function, characterized in that: The powder conveying system (1) comprises a fly ash tank (2), a conveying pipeline (3) and an ash bin (4); the conveying pipeline (3) is connected to a discharger (21) of the fly ash tank (2) and is connected to an inlet end at the top of the ash bin (4); A purge system (6) is provided on one side of the delivery pipeline (3), the purge system (6) comprising an air compression tank (7) and a ventilation pipeline (8) connected to the air compression tank (7), the ventilation pipeline (8) being respectively connected to a plurality of high-pressure air branch pipes (10), each high-pressure air branch pipe (10) being connected to a conduction electric valve (11), and a spray pipe (12) connected to the pipe wall of the delivery pipeline (3) being provided at the outlet end of the high-pressure air branch pipe (10).

2. The powder conveying system with dust cleaning function according to claim 1, characterized in that: The delivery pipeline (3) comprises an air inlet pipe section (31), a fluidizing pipe section (35) and a delivery pipe section (37) which are connected in sequence; The air inlet pipe section (31) is connected to the sorting fan, and a one-way valve (32) is connected to the air inlet pipe section (31); The fluidizing pipe section (35) is fixedly connected to the discharger (21), and an air inlet electric valve (33) and a fluidizing electric valve (36) are respectively provided at the inlet and outlet ends of the fluidizing pipe section (35); The conveying pipe section (37) comprises a straight pipe section and an angle elbow (38), and a feed electric valve (39) is connected between the end of the conveying pipe section (37) and the inlet end of the ash bin (4).

3. The powder conveying system with dust cleaning function according to claim 2, characterized in that: The ventilation duct (8) comprises at least four high-pressure air branch pipes (10) corresponding to the end of the air inlet pipe section (31), the end of the fluidizing pipe section (35), and the straight pipe section and the corner elbow (38) of the conveying pipe section (37).

4. The powder conveying system with dust cleaning function according to claim 3, characterized in that: The conveying pipeline (3), the air compression tank (7) and the ash bin (4) are respectively provided with a pipeline pressure gauge (34), an air compression tank pressure gauge (71) and an ash bin pressure gauge (46).

5. The powder conveying system with dust cleaning function according to claim 4, characterized in that: The ash bin (4) comprises a bin body (41) and a conical bin (42) connected to the lower end of the bin body (41); the lower end of the conical bin (42) is connected to a discharge pipe and a discharge electric valve (43).

6. The powder conveying system with dust cleaning function according to claim 5, characterized in that: A support platform (5) is provided on the upper part of the ash bin (4), and a plurality of groups of vibration-damping support assemblies (44) fixed on the support platform (5) are provided in the circumferential direction of the bin body (41). The ash bin (4) is suspended so that a material vehicle can pass through the lower end of the discharge pipe.

7. The powder conveying system with dust cleaning function according to claim 6, characterized in that: It also includes a PLC control cabinet, in which a control circuit is integrated, and the control circuit is electrically connected to the conduction electric valve (11), the air inlet electric valve (33), the fluidization electric valve (36), the feed electric valve (39), and the discharge electric valve (43).

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