Positive pressure pneumatic conveying system integrating multi-point loading and centralized conveying

Abstract

The utility model provides a positive pressure pneumatic conveying system integrating multi-point charging and centralized conveying, which comprises an air source system, a conveying pipeline system and a control system, and further comprises a bypass pipeline system which comprises a switching valve I, a switching valve II and a bypass pipeline, the conveying pump system comprises a conveying pump feeding valve, a conveying pump and a conveying pump discharging valve, and a control system is arranged on the conveying pump; the multi-point charging pump system is composed of a plurality of single-point charging pump systems; compressed air is adopted as a power source, pushing force is generated for materials in the SCM charging pump, the pipeline and the SCD conveying pump, so that the materials reach a preset target in the pipeline, the whole conveying process is in a totally-closed mode, and leakage is avoided. An automatic control system is adopted, manual intervention is not needed in the using process, intellectualization and diversification are integrated, energy conservation, environmental protection, high efficiency and high practicability are achieved, and the system is suitable for multiple fields of thermal power plants, building materials, chemical engineering, mining, metallurgy and the like.

Description

Technical Field

[0001] The utility model relates to the field of positive pressure pneumatic conveying systems, and particularly to a positive pressure pneumatic conveying system integrating multi-point feeding and centralized conveying. Background Art

[0002] At present, there are various pneumatic conveying technologies on the market, including positive pressure pneumatic conveying, negative pressure pneumatic conveying, and combined positive and negative pressure pneumatic conveying, etc., each of which has its own applicable working scenarios. However, for a special scenario: short-distance conveying is required, medium and long-distance conveying is also required, and frequent changes are needed. This poses the technical requirements of integrating multi-point feeding short-distance positive pressure pneumatic conveying and multi-point feeding centralized long-distance positive pressure pneumatic conveying. At present, there is no relevant solution in the domestic market, so there is an urgent need for a positive pressure pneumatic conveying system integrating multi-point feeding and centralized conveying of materials. Summary of the Utility Model

[0003] In order to solve the problem that there is a lack of a positive pressure pneumatic conveying system in the prior art that meets the comprehensive technical requirements of multi-point feeding short-distance positive pressure pneumatic conveying and multi-point feeding centralized long-distance positive pressure pneumatic conveying, the utility model provides a positive pressure pneumatic conveying system integrating multi-point feeding and centralized conveying;

[0004] The positive pressure pneumatic conveying system integrating multi-point feeding and centralized conveying provided by the utility model adopts the following technical solutions:

[0005] A positive pressure pneumatic conveying system integrating multi-point feeding and centralized conveying includes an air source system, a conveying pipeline system, and a control system. The air source system is used to provide conveying air and instrument air for the whole system. The conveying pipeline system includes a conveying pipeline. The control system includes a local control system. It further includes:

[0006] A bypass pipeline system, which includes a switching valve I, a switching valve II, and a bypass pipeline;

[0007] A conveying pump system, which includes a conveying pump inlet valve, a conveying pump, and a conveying pump outlet valve. A control system is provided on the conveying pump;

[0008] A multi-point feeding pump system, which is composed of several single-point feeding pump systems. Each single-point feeding pump system includes a feeding device, a manual shutter, an expansion joint, a feeding pump inlet valve, and a feeding pump. The manual shutter is connected to the feeding device and the expansion joint. The expansion joint is connected to the feeding pump inlet valve. The feeding pump inlet valve is connected to the feeding pump. A local control system is provided on each feeding pump;

[0009] The discharge ports of several of the charging pumps are all connected to a conveying pipeline. The conveying pipeline is respectively connected to a conveying pump inlet valve and a switching valve I to form a parallel pipeline. The conveying pump inlet valve is connected to the inlet port of the conveying pump. The discharge port of the conveying pump is connected to a conveying pump discharge valve. The switching valve I is connected to the switching valve II through a bypass pipeline. The switching valve II is connected to the conveying pipeline in parallel with the conveying pump discharge valve, and the conveying pipeline leads to the target bin.

[0010] Furthermore, the gas source system further includes a charging pump inlet gas valve and a conveying pump inlet gas valve. The gas source system respectively provides conveying gas for the charging pump and the conveying pump through the charging pump inlet gas valve and the conveying pump inlet gas valve.

[0011] Furthermore, each charging pump is connected with a charging pump exhaust valve, and each charging pump exhaust valve is connected with a hopper; the conveying pump is connected with a conveying pump exhaust valve, and the conveying pump exhaust valve is connected to any one of the hoppers.

[0012] Furthermore, it further includes a purging valve. The purging valve is connected to the conveying pipeline and is arranged behind the switching valve II and the conveying pump discharge valve. The purging valve can convey the residual materials in the conveying pipeline to the target bin.

[0013] Furthermore, it further includes a blockage removal valve. One end of the blockage removal valve is connected to the conveying pipeline and is arranged behind the switching valve II and the conveying pump discharge valve and before the purging valve. The other end of the blockage removal valve is connected to any one of the hoppers.

[0014] Furthermore, N single-point charging pump systems are arranged in the multi-point charging pump system, where N≥2.

[0015] Furthermore, the gas source system includes an air compressor system, a pipeline valve system, and a gas storage tank.

[0016] Furthermore, the conveying pipeline system includes a conveying pipeline, wear-resistant ceramic elbows, and wear-resistant ceramic tees, and the conveying pipeline is made of seamless pipe.

[0017] Furthermore, the control system includes a local solenoid valve box, a PLC control system, a host computer monitoring system, and cables and cable trays.

[0018] In summary, the beneficial effects of the present utility model are as follows:

[0019] The utility model can realize the switching between short-distance and medium-long-distance transportation by setting a multi-point loading pump system, a bypass pipeline system, a delivery pump system and a delivery pipeline system, and making the bypass pipeline system and the delivery pump system connected in parallel in the delivery pipeline system. When the target bin is relatively close, the multi-point loading pump system directly transports the material to the target bin through the bypass pipeline system; when the target bin is relatively far away, the material is first transported to the delivery pump system through the multi-point loading pump system, and then transported to the target bin through the delivery pump system. The whole transportation process adopts a fully enclosed form without leakage. This system adopts an automatic control system, and no manual intervention is required during the use process, realizing the integration of intelligence and diversification, with strong energy conservation, environmental protection, high efficiency and practicality, and is applicable to multiple fields such as thermal power plants, building materials, chemical industry, mining, metallurgy, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the single-point loading pump system of the utility model;

[0021] Figure 2 It is a schematic diagram of the overall system of the utility model.

[0022] As shown in the figure: 1 - gas source system, 2 - control system, 21 - local control system, 3 - delivery pipeline, 41 - switching valve 1, 42 - switching valve 2, 43 - bypass pipeline, 51 - delivery pump inlet valve, 52 - delivery pump, 53 - delivery pump outlet valve, 54 - delivery pump inlet air valve, 55 - delivery pump exhaust valve, 61 - manual slide gate, 62 - expansion joint, 63 - loading pump inlet valve, 64 - loading pump, 65 - loading pump inlet air valve, 66 - loading pump exhaust valve, 7 - ash hopper, 8 - purging valve, 9 - plugging removal valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following further describes the utility model in detail with reference to the Figure 1 and Figure 2 drawings:

[0024] An embodiment of the utility model discloses a positive pressure pneumatic conveying system integrating multi-point loading and centralized transportation. As Figure 1 and Figure 2 shown, a positive pressure pneumatic conveying system integrating multi-point loading and centralized transportation of the utility model includes a gas source system 1, a delivery pipeline system and a control system 2. The gas source system 1 is used to provide conveying gas and instrument gas for the whole system. The delivery pipeline system includes a delivery pipeline 3. The control system 2 includes a local control system 21, and further includes:

[0025] A bypass pipeline system, which includes a switching valve 1 (41), a switching valve 2 (42) and a bypass pipeline (43);

[0026] A transfer pump system, which includes a transfer pump inlet valve 51, a transfer pump 52, and a transfer pump outlet valve 53. A control system 2 is provided on the transfer pump 52;

[0027] A multi-point loading pump system, which is composed of several single-point loading pump systems. The single-point loading pump system includes a feeding device, a manual slide gate 61, an expansion joint 62, a loading pump inlet valve 63, and a loading pump 64. The manual slide gate 61 is connected to the feeding device and the expansion joint 62. The expansion joint 62 is connected to the loading pump inlet valve 63. The loading pump inlet valve 63 is connected to the loading pump 64. A local control system 21 is provided on each loading pump 64;

[0028] The discharge ports of several loading pumps 64 are all connected to a transfer pipeline 3. The transfer pipeline 3 is respectively connected to the transfer pump inlet valve 51 and a first switching valve 41 to form a parallel pipeline. The transfer pump inlet valve 51 is connected to the inlet port of the transfer pump 52. The outlet port of the transfer pump 52 is connected to the transfer pump outlet valve 53. The first switching valve 41 is connected to a second switching valve 42 through a bypass pipeline 43. The second switching valve 42 is connected to the transfer pump outlet valve 53 in parallel and then connected to the transfer pipeline 3. The transfer pipeline 3 leads to the target bin;

[0029] The gas source system 1 further includes a loading pump inlet gas valve 65 and a transfer pump inlet gas valve 54. The gas source system 1 provides transfer gas for the loading pump 64 and the transfer pump 52 respectively through the loading pump inlet gas valve 65 and the transfer pump inlet gas valve 54.

[0030] Each loading pump 64 is connected to a loading pump exhaust valve 66. Each loading pump exhaust valve 66 is connected to a hopper 7; The transfer pump 52 is connected to a transfer pump exhaust valve 55. The transfer pump exhaust valve 55 is connected to any one of the hoppers 7 (generally connected to the nearest hopper 7).

[0031] It further includes a purging valve 8. The purging valve 8 is connected to the transfer pipeline 3 and is provided after the second switching valve 42 and the transfer pump outlet valve 53. The purging valve 8 can convey the residual materials in the transfer pipeline 3 to the target bin.

[0032] It further includes a blockage removal valve 9. One end of the blockage removal valve 9 is connected to the transfer pipeline 3 and is provided after the second switching valve 42 and before the purging valve 8. The other end of the blockage removal valve 9 is connected to any one of the hoppers 7 (generally connected to the nearest hopper 7).

[0033] In this embodiment, for the convenience of understanding, the number of single-point loading pump systems is four. The structure of the single-point loading pump system is as Figure 1 shown. The distribution and connection mode of the single-point loading pump system are as Figure 2 shown. The model of the loading pump 64 is SCM pump, and the model of the transfer pump 52 is SCD pump, both of which are equipment models that can be purchased in the prior art.

[0034] The conveying pipeline system includes a conveying pipeline 3, wear-resistant ceramic elbows, and wear-resistant ceramic tees. The conveying pipeline 3 is made of seamless pipe. The layout of the conveying pipeline system is simple and convenient, facilitating inspection and maintenance.

[0035] The air source system 1 includes an air compressor system, a pipeline valve system, and a gas storage tank; the connection method between the air source system 1 and the loading pump 64 and the conveying pump 52 is the prior art. The following is a brief description of the connection method. Both the loading pump 64 and the conveying pump 52 have discharge elbows and material emitters. The air source system 1 includes a gas storage tank, a main gas transmission pipeline connected to the air outlet of the gas storage tank, and three branch gas transmission pipelines connected to the main gas transmission pipeline. The three branch gas transmission pipelines include a first branch gas transmission pipeline connected to the loading pump 64 and the conveying pump 52, a second branch gas transmission pipeline connected to the discharge elbow, and a third branch gas transmission pipeline connected to the material emitter. The installation position of the loading pump inlet valve 65 is as Figure 1 shown. The air source system 1 provides conveying gas for the loading pump 64 through the loading pump inlet valve 65; the installation position of the conveying pump inlet valve 54 is as Figure 2 shown. The conveying pump inlet valve 54 is provided on all three branch gas transmission pipelines. The air source system 1 provides conveying gas for the conveying pump 52 through the conveying pump inlet valve 54.

[0036] The control system 2 is the main control and is installed on the conveying pump 52. The local control system 21 is the sub-control and is installed on the loading pump 64. The control system 2 includes a local solenoid valve box, a PLC control system 2, a host computer monitoring system, and cables and cable trays; the PLC control system 2 is electrically connected to the local solenoid valve box. The PLC control system 2 is used to receive the electrical signals sent by the host computer monitoring system, control the local solenoid valve box through the electrical signals transmitted through the cables, and recover the feedback signals through the cables and finally feedback them to the host computer monitoring system. The control system 2 adopts PLC control to automate the positive pressure pneumatic conveying system of multi-point loading and centralized conveying, realizing automatic feeding, automatic detection of full material, automatic conveying, automatic stop, without the need for on-site personnel operation, fully realizing automation. The operation status of the equipment in the positive pressure pneumatic conveying system of multi-point loading and centralized conveying can be monitored in the host computer monitoring system, and functions such as setting the conveying time and conveying cycle and simultaneously realizing valve damage alarm can be carried out on the host computer.

[0037] The utility model can realize the switching between short-distance and medium-long-distance transportation by setting a multi-point loading pump system, a bypass pipeline system, a delivery pump system and a delivery pipeline system, and connecting the bypass pipeline system and the delivery pump system in parallel in the delivery pipeline system. When the target bin is relatively close, the multi-point loading pump system directly transports the material to the target bin through the bypass pipeline system; when the target bin is relatively far away, the material is first transported to the delivery pump system through the multi-point loading pump system, and then transported to the target bin through the delivery pump system. Preferably, there are N single-point loading pump systems in the multi-point loading pump system, and N≥2.

[0038] The implementation principle of the embodiment of the utility model is as follows:

[0039] The utility model is applicable to two different scenarios: short-distance transportation or medium-long-distance transportation.

[0040] When performing short-distance transportation:

[0041] The delivery pump inlet valve 51 and the delivery pump outlet valve 53 are closed, the switching valve I 41 and the switching valve II 42 are opened, the multi-point loading pump system is started, the manual shutter 61 in the single-point loading pump system is in the open state, the loading pump inlet valve 63 and the loading pump exhaust valve 66 are opened during system operation, the material falls into the loading pump 64 under the action of gravity respectively. When the set feeding time arrives, the loading pump inlet valve 63 and the loading pump exhaust valve 66 are closed after a one-second delay, the loading pump inlet valve 65 is opened, and the material is pressurized by compressed air to flow from the loading pump 64 to the delivery pipeline 3 and is transported to the target bin through the bypass pipeline 43.

[0042] When performing medium-long-distance transportation:

[0043] The manual shutter 61 in the multi-point loading pump system is in the open state, the loading pump inlet valve 63 and the loading pump exhaust valve 66 are opened during system operation, the material falls into the loading pump 64 under the action of gravity respectively. When the set feeding time arrives, the loading pump inlet valve 63 and the loading pump exhaust valve 66 are closed after a one-second delay. At this time, the delivery pump outlet valve 53, the switching valve I 41 and the switching valve II 42 are in the closed state; the delivery pump inlet valve 51 and the delivery pump exhaust valve 55 are opened, the loading pump inlet valve 65 is opened, and the material is pressurized by compressed air to flow from the loading pump 64 to the delivery pump 52. When the high material level of the delivery pump 52 is triggered or when the set feeding time arrives, the loading of the delivery pump 52 is completed, the delivery pump inlet valve 51 and the loading pump 64 are closed, and the next loading procedure is entered; the delivery pump exhaust valve 55 is closed, the delivery pump outlet valve 53 is opened, the delivery pump inlet valve 54 is opened, and the material is pressurized by compressed air to flow from the delivery pump 52 into the delivery pipeline 3 and finally enters the target bin. When the set delivery time or the set pressure arrives, the delivery pump inlet valve 54 is closed, the delivery pump outlet valve 53 is closed, and the delivery of the delivery pump 52 is completed and the next loading procedure is entered.

[0044] After the material conveying is completed, the cleaning procedure is entered:

[0045] The purging valve 8 is opened timely according to the program setting to convey the residual material in the conveying pipeline 3 to the target bin. The gas discharged from the charging pump exhaust valve 66 enters their respective hoppers 7, and the gas discharged from the conveying pump exhaust valve 55 enters the hopper 7.

[0046] When the conveying pipeline 3 is blocked, the blockage removal procedure is entered:

[0047] The switching valve II 42 and the conveying pump discharge valve 53 are closed. The purging valve 8 pressurizes the conveying pipeline 3, and the blockage removal valve 9 is automatically opened according to the pressure set by the program. The blocked material enters the hopper 7, and the switching valve I 41 and the switching valve II 42 are automatically or manually opened according to the program setting.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Each component mentioned in the present invention is a common technology in the existing field. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A positive pressure pneumatic conveying system for multi-point loading and centralized conveying, comprising a gas source system (1), a conveying pipeline system, and a control system (2). The gas source system (1) is used to provide conveying gas and instrument gas for the whole system. The conveying pipeline system includes a conveying pipeline (3). The control system (2) includes a local control system (21), and is characterized in that, It also includes: A bypass pipeline system, which includes a first switching valve (41), a second switching valve (42) and a bypass pipeline (43); A delivery pump system, which includes a delivery pump inlet valve (51), a delivery pump (52) and a delivery pump outlet valve (53), and a control system (2) is provided on the delivery pump (52); A multi-point loading pump system, which is composed of several single-point loading pump systems. Each single-point loading pump system includes a feeding device, a manual slide gate (61), an expansion joint (62), a loading pump inlet valve (63) and a loading pump (64). The manual slide gate (61) is connected to the feeding device and the expansion joint (62), the expansion joint (62) is connected to the loading pump inlet valve (63), and the loading pump inlet valve (63) is connected to the loading pump (64). A local control system (21) is provided on each loading pump (64); The discharge ports of several loading pumps (64) are all connected to a delivery pipeline (3). The delivery pipeline (3) is respectively connected to the delivery pump inlet valve (51) and the first switching valve (41) to form a parallel pipeline. The delivery pump inlet valve (51) is connected to the inlet port of the delivery pump (52), the outlet port of the delivery pump (52) is connected to the delivery pump outlet valve (53), the first switching valve (41) is connected to the second switching valve (42) through the bypass pipeline (43), and the second switching valve (42) is connected to the delivery pump outlet valve (53) in parallel and then connected to the delivery pipeline (3). The delivery pipeline (3) leads to the target bin.

2. The positive pressure pneumatic conveying system for multi-point feeding and centralized conveying according to claim 1, wherein The gas source system (1) also includes a loading pump inlet gas valve (65) and a delivery pump inlet gas valve (54). The gas source system (1) provides conveying gas for the loading pump (64) and the delivery pump (52) respectively through the loading pump inlet gas valve (65) and the delivery pump inlet gas valve (54).

3. The positive pressure pneumatic conveying system for multi-point feeding and centralized conveying according to claim 2, wherein Each loading pump (64) is connected with a loading pump exhaust valve (66), and each loading pump exhaust valve (66) is connected with a hopper (7); the delivery pump (52) is connected with a delivery pump exhaust valve (55), and the delivery pump exhaust valve (55) is connected to any one of the hoppers (7).

4. A positive pressure pneumatic conveying system for multi-point loading and centralized conveying according to claim 3, characterized in that It also includes a purging valve (8), which is connected to the delivery pipeline (3) and is arranged after the second switching valve (42) and the delivery pump outlet valve (53). The purging valve (8) can convey the residual materials in the delivery pipeline (3) to the target bin.

5. A positive pressure pneumatic conveying system for multi-point loading and centralized conveying according to claim 4, characterized in that, It also includes a blockage removal valve (9). One end of the blockage removal valve (9) is connected to the delivery pipeline (3) and is arranged after the second switching valve (42) and the delivery pump outlet valve (53) and before the purging valve (8). The other end of the blockage removal valve (9) is connected to any one of the hoppers (7).

6. A positive pressure pneumatic conveying system for multi-point feeding and centralized conveying according to claim 1, characterized in that, There are N single-point loading pump systems in the multi-point loading pump system, and N≥2.

7. A positive pressure pneumatic conveying system for multi-point feeding and centralized conveying according to claim 1, characterized in that, The gas source system (1) includes an air compressor system, a pipeline valve system and a gas storage tank.

8. A positive pressure pneumatic conveying system for multi-point loading and centralized conveying according to claim 1, characterized in that, The delivery pipeline system includes a delivery pipeline (3), wear-resistant ceramic elbows and wear-resistant ceramic tees, and the delivery pipeline (3) is made of seamless pipe.

9. A positive pressure pneumatic conveying system for multi-point feeding and centralized conveying according to claim 1, characterized in that, The control system (2) includes a local solenoid valve box, a PLC control system (2), a host computer monitoring system, as well as cables and cable trays.

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