Heavy-load step-by-step direct-acting pneumatic conveying system for coarse slag

Abstract

The utility model relates to the field of coal ash conveying equipment, in particular to a heavy-load step-by-step direct-acting pneumatic conveying system for coarse slag, which comprises a feeding system, a crushing system, a temporary storage system, a bin pump, a pneumatic slag conveying system and a tail end slag bin which are communicated with one another through pipelines. The feeding system comprises an original slag bin, a discharging valve is arranged in the original slag bin and communicated with a feeding device, the position, away from the discharging valve, of the feeding device is communicated with the crushing device, and the position, away from the discharging valve, of the crushing device is communicated with the temporary storage system. The temporary storage system comprises a temporary storage slag bin, the temporary storage slag bin is provided with a manual feeding valve, the manual feeding valve controls opening and closing of the temporary storage slag bin, the temporary storage slag bin is communicated with a bin pump, friction and collision of coarse and heavy materials in the conveying process are reduced through the step-by-step direct-acting conveying units arranged along the main pipeline, the conveying efficiency is improved, and the conveying cost is reduced. And the effect of improving the use flexibility of the slag conveying system is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of coarse slag conveying equipment, specifically to a heavy-duty, step-by-step, direct-drive pneumatic conveying system for coarse slag. Background Technology

[0002] Pneumatic conveying systems, also known as airflow conveying systems, are generally divided into two types: positive pressure conveying and negative pressure conveying. Positive pressure conveying involves inputting compressed air into the initial conveying pipeline, utilizing the pressure difference between the beginning and end of the pipeline to cause the mixture of air and conveyed material to flow at a certain velocity within the pipeline. It offers advantages such as a closed conveying process, high efficiency and energy saving, and flexible layout, and is widely used in the material transportation and conveying industry.

[0003] Currently, the processing of coarse and heavy particulate materials such as slag mainly involves "dry slag conveying + mechanical crushing" followed by temporary storage in intermediate slag bins, and then transportation by vehicle to the end-of-plant ash silo. This transportation process causes serious environmental pollution within the plant area and consumes a significant amount of manpower and resources. On the other hand, positive pressure pneumatic slag conveying systems are gradually emerging in the field of coarse and heavy material conveying, and related engineering research and applications are continuously advancing. As a relatively novel conveying engineering application, current research on positive pressure pneumatic slag conveying mainly focuses on positive pressure double-pipe pneumatic conveying. However, this system suffers from poor adaptability due to frequent changes in coal type and load in coal-fired power plants. During conveying, the pipelines experience severe wear, resulting in high energy consumption and a high susceptibility to blockages. Furthermore, the system often lacks flexibility and adjustability, making it difficult to adapt to different material characteristics and conveying environments. Utility Model Content

[0004] The purpose of this invention is to provide a heavy-duty, step-by-step, direct-drive pneumatic conveying system for coarse slag, thereby improving the flexibility of the slag conveying system and solving the problems mentioned in the background art.

[0005] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0006] The heavy-duty, step-by-step, direct-drive pneumatic conveying system for coarse slag includes a feeding system, a crushing system, a buffer system, a silo pump, a pneumatic slag conveying system, and an end slag silo. The various systems are interconnected by pipelines.

[0007] The feeding system includes a raw slag bin, a discharge valve in the raw slag bin, a feeding device connected to the discharge valve, a feeding device connected to a crushing device at a position away from the discharge valve, and a buffer system connected to a position away from the discharge valve in the crushing device.

[0008] The buffer system includes a buffer slag bin, which is equipped with a manual feed valve. The manual feed valve controls the opening and closing of the buffer slag bin, and the buffer slag bin is connected to the silo pump.

[0009] The bin pump includes a bin pump with a pneumatic feeding valve, the buffer residue bin is communicated with the pneumatic feeding valve first and then communicated with the bin pump, and the bin pump is communicated with the terminal residue bin.

[0010] The pneumatic residue conveying system comprises a gas storage tank, the gas storage tank is provided with a gas source control valve, the gas storage tank is communicated with a main air inlet assembly through the gas source control valve, the main air inlet assembly is communicated with a bin pump air inlet valve, the bin pump air inlet valve is communicated with the bin pump, the bin pump air inlet valve controls the gas in the gas storage tank to enter the bin pump, a plurality of distributed direct-acting conveying units are arranged between the bin pump and the terminal residue bin, and the plurality of distributed direct-acting conveying units are sequentially communicated.

[0011] As preferred in the utility model, a standby system is arranged between the buffer system and the terminal residue bin, the standby system comprises a standby bin pump, the buffer residue bin is communicated with the standby bin pump, the buffer residue bin is communicated with the standby bin pump and the bin pump through a balance valve, and the standby bin pump is separately communicated with the terminal residue bin through a plurality of distributed direct-acting conveying units.

[0012] As preferred in the utility model, the bin pump and the standby bin pump are both provided with a material level meter, and the bottom end of the bin pump is provided with a discharging valve.

[0013] As preferred in the utility model, the pneumatic residue conveying system is provided with a gas accompanying system, the gas accompanying system comprises an instrument compressed air unit, the instrument compressed air unit provides gas flow for the gas accompanying system, the instrument compressed air unit is communicated with a gas accompanying assembly, and the gas accompanying assembly is communicated with each distributed direct-acting conveying unit.

[0014] As preferred in the utility model, the pneumatic residue conveying system and the gas accompanying system are respectively provided with pressure detectors.

[0015] As preferred in the utility model, the pneumatic residue conveying system and the gas accompanying system are jointly connected with an electromagnetic valve box, and the electromagnetic valve box is electrically connected with the pressure detectors.

[0016] As preferred in the utility model, the main air inlet assembly comprises a manual cut-off valve, one side of the manual cut-off valve is communicated with the gas storage tank, the other side is communicated with a filter, one end of the filter away from the manual cut-off valve is communicated with a pressure regulating valve, the pressure regulating valve is communicated with a pneumatic cut-off valve, the pneumatic cut-off valve is communicated with a check valve, and the check valve is communicated with the distributed direct-acting conveying unit.

[0017] As preferred in the utility model, the gas accompanying assembly comprises a gas accompanying manual cut-off valve, one side of the gas accompanying manual cut-off valve is communicated with the instrument compressed air unit, the other side is communicated with a gas accompanying filter, one end of the gas accompanying filter is provided with a gas accompanying pressure regulating valve, the position of the gas accompanying filter away from the gas accompanying manual cut-off valve is communicated with a gas accompanying pneumatic cut-off valve, the gas accompanying pneumatic cut-off valve is communicated with a gas accompanying check valve, and the gas accompanying check valve is communicated with the distributed direct-acting conveying unit.

[0018] The crushing device is provided with a screening device between the crushing device and the buffer residue bin, the screening device is separately communicated with a lifting device, the bottom of the lifting device is communicated with the screening device, and the top end is communicated with the original residue bin.

[0019] Advantageous effects

[0020] The utility model discloses the beneficial effect is:

[0021] The crushing system is installed below the original residue bin outlet, the material treated through the crushing system first enters the buffer system, then enters the bin pump temporary storage, and then starts the pneumatic residue conveying system under the orderly control of the system. When the control system starts conveying residue, first, start the instrument air compressor and the residue conveying air compressor, open the main air inlet assembly and the air accompanying assembly, close the feed valve at the upper end of the bin pump, start the bin pump fluidization, open the bin pump discharge valve, start the pneumatic residue conveying in the main pipeline, convey the residue gas mixture to the end of the pipeline, and finally transport to the end residue bin. Through the step-by-step direct conveying unit arranged along the main pipeline, the friction and collision of heavy materials in the conveying process are reduced, the conveying efficiency is improved, the use flexibility of the residue conveying system is improved, the efficient, stable and reliable conveying of heavy load materials is realized, the conveying efficiency is improved, the energy consumption is reduced, and the technical progress and green development of the related industry are promoted. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating creative labor.

[0023] Figure 1 It is a schematic diagram of the step-by-step direct pneumatic conveying system for heavy load residue.

[0024] Figure 2 It is a schematic diagram of the main air inlet assembly.

[0025] Figure 3 It is a schematic diagram of the air accompanying assembly.

[0026] Figure 4 It is a running program logic diagram of the step-by-step direct conveying unit.

[0027] In the drawings, the component list represented by each sign is as follows:

[0028] 1, the original slag bin; 2, the discharge valve; 3, the feeding device; 4, the crushing device; 5, the screening device; 6, the buffer bin; 7, the lifting device; 8, the balance valve; 9, the manual feeding valve; 10, the pneumatic feeding valve; 11, the bin pump; 12, the level gauge; 13, the bin pump air inlet valve; 14, the discharge valve; 17, the distributed direct conveying unit; 19, the pressure detector; 20, the main air inlet assembly; 2001, the manual cut-off valve; 2002, the filter; 2003, the pressure regulating valve; 2004, the pneumatic cut-off valve; 2005, the check valve; 22, the air storage tank; 24, the standby bin pump; 25, the solenoid valve box; 26, the instrument compressed air unit; 27, the accompanying gas assembly; 2701, the accompanying gas manual cut-off valve; 2702, the accompanying gas filter; 2703, the accompanying gas pressure regulating valve; 2704, the accompanying gas pneumatic cut-off valve; 2705, the accompanying gas check valve; 28, the terminal slag bin. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0030] Referring to Figures 1-4 As shown in the figure, the coarse slag heavy load step-by-step direct pneumatic conveying system, including feeding system, crushing system, buffer system, bin pump 11, pneumatic conveying slag system standby system and terminal slag bin 28, each system is connected by pipeline, the particle size of coarse slag is reduced through the crushing system, thereby reducing the wear and tear generated in the pipeline, the standby system can be replaced in time, improve the flexibility of equipment use, reach the effect of improving the use flexibility of the slag conveying system.

[0031] The feeding system includes the original slag bin 1, the original slag bin 1 is provided with the discharge valve 2, the discharge valve 2 is communicated with the feeding device 3, the position away from the discharge valve 2 of the feeding device 3 is communicated with the crushing device 4, the position away from the discharge valve 2 of the crushing device 4 is communicated with the buffer system;

[0032] The buffer system includes the buffer bin 6, the buffer bin 6 is provided with the manual feeding valve 9, the manual feeding valve 9 controls the opening and closing of the buffer bin 6, the buffer bin 6 is communicated with the bin pump 11; the screening device 5 is arranged between the crushing device 4 and the buffer bin 6, the screening device 5 is separately communicated with the lifting device 7, the bottom of the lifting device 7 is communicated with the screening device 5, the top end is communicated with the original slag bin 1, through the setting of the lifting device 7, the coarse slag with larger particle size screened can be put back into the original slag bin 1, the accuracy of crushing is improved.

[0033] The bin pump 11 comprises a bin pump 11 with a pneumatic feeding valve 10, the buffer residue bin 6 is communicated with the pneumatic feeding valve 10 and then communicated with the bin pump 11, and the bin pump 11 is communicated with the terminal residue bin 28;

[0034] The pneumatic residue conveying system comprises a gas storage tank 22, the gas storage tank 22 is provided with a gas source control valve, the gas storage tank 22 is communicated with a main gas inlet assembly 20 through the gas source control valve, the main gas inlet assembly 20 comprises a manual cut-off valve 2001, one side of the manual cut-off valve 2001 is communicated with the gas storage tank 22, the other side is communicated with a filter 2002, one end of the filter 2002 is communicated with a pressure regulating valve 2003 which is away from the manual cut-off valve 2001, the pressure regulating valve 2003 is communicated with a pneumatic cut-off valve 2004, the pneumatic cut-off valve 2004 is communicated with a check valve 2005, and the check valve 2005 is communicated with the distributed direct-acting conveying unit 17. Meanwhile, the check valve 2005 is communicated with a bin pump gas inlet valve 13, the bin pump gas inlet valve 13 is communicated with the bin pump 11, the bin pump gas inlet valve 13 controls the gas in the gas storage tank 22 to enter the bin pump 11, and a plurality of distributed direct-acting conveying units 17 are arranged between the bin pump 11 and the terminal residue bin 28, and the plurality of distributed direct-acting conveying units 17 are sequentially communicated.

[0035] The standby system comprises a standby bin pump 24, the buffer residue bin 6 is communicated with the standby bin pump 24, the buffer residue bin 6 is communicated with the standby bin pump 24 and the bin pump 11 through the balance valve 8, and the standby bin pump 24 is separately communicated with the terminal residue bin 28 through a plurality of distributed direct-acting conveying units 17. The bin pump 11 and the standby bin pump 24 are both provided with a material level meter 12, and the bottom end of the bin pump 11 is provided with a discharging valve 14.

[0036] The pneumatic residue conveying system is provided with a gas accompanying system, the gas accompanying system comprises an instrument compressed air unit 26, the instrument compressed air unit 26 provides a gas flow for the gas accompanying system, the instrument compressed air unit 26 is communicated with a gas accompanying assembly 27, the gas accompanying assembly 27 comprises a gas accompanying manual cut-off valve 2701, one side of the gas accompanying manual cut-off valve 2701 is communicated with the instrument compressed air unit 26, the other side is communicated with a gas accompanying filter 2702, one end of the gas accompanying filter 2702 is provided with a gas accompanying pressure regulating valve 2703, the gas accompanying filter 2702 is communicated with a gas accompanying pneumatic cut-off valve 2704 which is away from the gas accompanying manual cut-off valve 2701, the gas accompanying pneumatic cut-off valve 2704 is communicated with a gas accompanying check valve 2705, the gas accompanying check valve 2705 is communicated with the distributed direct-acting conveying unit 17, and the pneumatic residue conveying system and the gas accompanying system are respectively provided with a pressure detector 19.

[0037] The pneumatic slag conveying system and the gas accompanying system are jointly connected with an electromagnetic valve box 25, the electromagnetic valve box 25 is electrically connected with the pressure detector 19, and the pneumatic slag conveying system can be controlled in time through the control of the electromagnetic valve box 25, so that the use convenience of the pneumatic slag conveying system is improved. When the main slag conveying pipeline appears a block point with pressure rising and reaching a set opening pressure, the step-by-step direct conveying units on the gas accompanying pipeline can be intelligently opened to supplement air and blow the block, meanwhile, the distribution control gas paths connected with each other can generate action inhibition to the upstream step-by-step direct conveying units and generate action propulsion to the downstream step-by-step direct conveying units, so that sequential blowing is formed from the block point position, the conveyed material is moved forward in sections and steps under the action of the air flow, the blockage problem is prevented and solved, and the safe operation of the conveying system is ensured. When being lower than the pressure set value, the step-by-step direct conveying units are automatically closed to realize stop fluidization and air supplement, meanwhile, the upstream inhibition is ended, the whole process does not need program control, and each step-by-step direct conveying unit can realize independent work. Through continuously repeating the process, the high-efficiency and stable conveying of heavy-load coarse slag material is realized.

[0038] Of course, the above description is not a limitation of the present application, the present application is not limited to the above examples, and the changes, changes, additions or replacements made by the ordinary skilled in the art within the essential scope of the present application shall belong to the protection scope of the present application.

Claims

1. A coarse slag heavy load step-wise direct acting pneumatic conveying system characterized by: It comprises a feeding system, a crushing system, a buffer system, a bin pump (11), a pneumatic slag conveying system and a terminal slag bin (28), and pipes are used to connect each system with each other; The feeding system comprises a raw slag bin (1), the raw slag bin (1) is provided with a discharge valve (2), the discharge valve (2) is communicated with a feeding device (3), the position, away from the discharge valve (2), of the feeding device (3) is communicated with a crushing device (4), and the position, away from the discharge valve (2), of the crushing device (4) is communicated with the buffer system; The buffer system comprises a buffer slag bin (6), the buffer slag bin (6) is provided with a manual feeding valve (9), the manual feeding valve (9) controls the opening and closing of the buffer slag bin (6), and the buffer slag bin (6) is communicated with the bin pump (11); The bin pump (11) comprises a bin pump (11) provided with a pneumatic feeding valve (10), the buffer slag bin (6) is firstly communicated with the pneumatic feeding valve (10) and then communicated with the bin pump (11), and the bin pump (11) is communicated with the terminal slag bin (28); The pneumatic slag conveying system comprises a gas storage tank (22), the gas storage tank (22) is provided with a gas source control valve, the gas storage tank (22) is communicated with a main air inlet assembly (20) through the gas source control valve, the main air inlet assembly (20) is communicated with a bin pump air inlet valve (13), the bin pump air inlet valve (13) is communicated with the bin pump (11), the bin pump air inlet valve (13) controls the gas in the gas storage tank (22) to enter the bin pump (11), and a plurality of distributed direct-acting conveying units (17) are arranged between the bin pump (11) and the terminal slag bin (28) and sequentially communicated.

2. The coarse slag heavy load step-wise direct drive pneumatic conveying system according to claim 1, characterized in that: A standby system is arranged between the buffer system and the terminal slag bin (28), the standby system comprises a standby bin pump (24), the buffer slag bin (6) is communicated with the standby bin pump (24), the buffer slag bin (6) is communicated with the standby bin pump (24) and the bin pump (11) through a balance valve (8), and the standby bin pump (24) is separately communicated with the terminal slag bin (28) through a plurality of distributed direct-acting conveying units (17).

3. The coarse slag heavy load step-lift pneumatic conveying system according to claim 2, characterized in that: The bin pump (11) and the standby bin pump (24) are both provided with a material level meter (12), and the bottom end of the bin pump (11) is provided with a discharging valve (14).

4. The coarse slag heavy load step drive pneumatic conveying system according to claim 3, characterized in that: The pneumatic slag conveying system is provided with an air accompanying system, the air accompanying system comprises an instrument compressed air unit (26), the instrument compressed air unit (26) provides air flow for the air accompanying system, the instrument compressed air unit (26) is communicated with an air accompanying assembly (27), and the air accompanying assembly (27) is communicated with each distributed direct-acting conveying unit (17).

5. The coarse slag heavy load step drive pneumatic conveying system according to claim 4, characterized in that: The pneumatic slag conveying system and the air accompanying system are respectively provided with a pressure detector (19).

6. The coarse slag heavy load step-lift pneumatic conveying system according to claim 5, characterized in that: The pneumatic slag conveying system and the air accompanying system are commonly connected with an electromagnetic valve box (25), and the electromagnetic valve box (25) is electrically connected with the pressure detector (19).

7. The coarse slag heavy load step-lift direct-drive pneumatic conveying system of claim 1, wherein: The main air inlet assembly (20) comprises a manual cut-off valve (2001), one side of which is communicated with the air tank (22), the other side of which is communicated with a filter (2002), the filter (2002) is communicated with a pressure regulating valve (2003) away from the position of the manual cut-off valve (2001), the pressure regulating valve (2003) is communicated with a pneumatic cut-off valve (2004), the pneumatic cut-off valve (2004) is communicated with a check valve (2005), and the check valve (2005) is communicated with the distribution direct drive conveying unit (17).

8. The coarse slag heavy load step drive pneumatic conveying system according to claim 4, characterized in that: The air accompanying assembly (27) comprises an air accompanying manual cut-off valve (2701), one side of which is communicated with the instrument compressed air unit (26), the other side of which is communicated with an air accompanying filter (2702), one end of the air accompanying filter (2702) is provided with an air accompanying pressure regulating valve (2703), the air accompanying filter (2702) is communicated with an air accompanying pneumatic cut-off valve (2704) away from the position of the air accompanying manual cut-off valve (2701), the air accompanying pneumatic cut-off valve (2704) is communicated with an air accompanying check valve (2705), and the air accompanying check valve (2705) is communicated with the distribution direct drive conveying unit (17).

9. The coarse slag heavy load step direct drive pneumatic conveying system according to claim 1, characterized in that: The screening device (5) is arranged between the crushing device (4) and the buffer residue bin (6), the screening device (5) is separately communicated with the lifting device (7), the bottom of the lifting device (7) is communicated with the screening device (5), and the top end is communicated with the original residue bin (1).

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