Conveying system

Abstract

The utility model relates to the technical field of material conveying, in particular to a conveying system which comprises a feeding tank, a material receiving bin and an air compressor, the top of the feeding tank is used for inputting materials of a previous system, the bottom of the feeding tank is communicated with a main conveying pipeline, the top of the material receiving bin is communicated with the main conveying pipeline so as to receive the materials conveyed from the feeding tank, and the air compressor is connected with the air compressor. The bottom of the material receiving bin communicates with the rear channel system to output materials, a first air outlet branch pipe of the air compressor communicates with the side wall of the bottom of the feeding tank to conduct air inflation fluidization on the materials at the bottom of the feeding tank, and a second air outlet branch pipe of the air compressor communicates with the upstream of the main conveying pipeline to conduct pneumatic conveying on the materials in the main conveying pipeline. A third air outlet branch pipe of the air compressor communicates with the side wall of the bottom of the material receiving bin so as to conduct inflation fluidization on materials at the bottom of the material receiving bin. The technical problem that in the prior art, a pneumatic conveying system is incomplete is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of material conveying, in particular to a conveying system. Background Art

[0002] Pneumatic conveying is to use the energy of airflow to convey granular materials in the direction of airflow in a closed pipe. Pneumatic conveying devices have simple structures, easy operation, large conveying capacity, long conveying distance and high conveying speed, and are therefore widely used in industrial production.

[0003] Most of the auxiliary airflows for pneumatic conveying are compressed air. Through the movement of compressed air in the closed conveying pipeline, the materials falling into the conveying pipeline are "inflated" and fluidized, and the fluidized powder and granular materials will move in the conveying pipeline to the required pipe network along the direction of the airflow. The compressed air used in the above is usually achieved by an air compressor. 1. The pneumatic conveying system is imperfect; 2. The generated compressed air is directly connected to the conveying pipeline system, and the filter element is missing, which is easy to cause physical pollution caused by impurities mixed with the material; 3. When the conveyed material is a medium that is not easy to contact with air, the compressed air from the compressor or blower is easy to cause the material to react with air as a medium to produce chemical pollution. In order to avoid the above problems, a new process flow is proposed to solve the above problems and achieve the purpose of conveying. Utility Model Content

[0004] In order to solve the technical problem of imperfect pneumatic conveying system in the prior art, the present application proposes a conveying system to solve the above technical problem.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The utility model provides a conveying system, characterized in that it comprises: a feed tank, the top of the feed tank is used to input materials into a front-end system, and the bottom of the feed tank is connected to a main conveying pipeline; a receiving bin, the top of the receiving bin is connected to the main conveying pipeline to receive materials conveyed from the feed tank, and the bottom of the receiving bin is connected to a back-end system to output the materials; an air compressor, a first air outlet branch pipe of the air compressor is connected to the bottom side wall of the feed tank to inflate and gasify the materials at the bottom of the feed tank, a second air outlet branch pipe of the air compressor is connected to the upstream of the main conveying pipeline to pneumatically convey the materials in the main conveying pipeline, and a third air outlet branch pipe of the air compressor is connected to the bottom side wall of the receiving bin to inflate and gasify the materials at the bottom of the receiving bin.

[0007] Furthermore, the main conveying pipeline is also provided with a venturi accelerator and an online ejector to accelerate the material in the main conveying pipeline.

[0008] Furthermore, the air compressor is also provided with a fourth air outlet branch pipe, and the fourth air outlet branch pipe is connected to the inlet of the venturi accelerator.

[0009] Furthermore, a gas circulation pipeline is also arranged on the feed tank, one end of the gas circulation pipeline is connected to the top of the feed tank, and the other end of the gas circulation pipeline is connected to the bottom side wall of the receiving bin, so that part of the gas input into the feed tank by the first gas outlet pipe of the air compressor can enter the bottom of the receiving bin through the gas circulation pipeline to inflate and fluidize the material at the bottom of the receiving bin.

[0010] Furthermore, a first dust collector is also arranged on the feed tank, one end of the first dust collector is directly connected to the top of the feed tank, and the other end of the first dust collector is connected to the gas circulation pipeline to access the gas in the gas circulation pipeline for backwashing.

[0011] Furthermore, a second dust collector is also arranged on the receiving bin, one end of the second dust collector is directly connected to the top of the receiving bin, and the other end of the first dust collector is connected to the fifth air outlet pipe of the air compressor to connect to the gas output by the fifth air outlet pipe of the air compressor for backwashing.

[0012] Furthermore, there are multiple material receiving bins, and a reversing valve is arranged at the branch from the main conveying pipeline to each material receiving bin.

[0013] Furthermore, it also includes a gas purification module, which includes an oil removal filter, a refrigerated dryer, a dust filter and an oil-water separation filter which are sequentially connected to the downstream of the air compressor.

[0014] Furthermore, a clean gas buffer tank is arranged downstream of the gas purification module, and at the same time, the clean gas buffer tank is arranged upstream of the first gas outlet branch pipe and the second gas outlet branch pipe of the air compressor.

[0015] Furthermore, it also includes a nitrogen production module, which includes: two adsorption tanks, the air inlet end of the adsorption tank is connected to the downstream of the air compressor; a nitrogen buffer tank, the air inlet end of the nitrogen buffer tank is connected to the air outlet end of the adsorption tank, and the air outlet end of the nitrogen buffer tank is connected to the upstream of all the air outlet pipes of the air compressor; a muffler, the air outlet end of the muffler is connected to the outside atmosphere, the air inlet end of the muffler is connected to the air inlet end of the adsorption tank to discharge unqualified gas before entering the adsorption tank, and at the same time, the air inlet end of the muffler is also connected to the air outlet end of the nitrogen buffer tank to discharge unqualified nitrogen output from the nitrogen buffer tank.

[0016] Based on the above technical solution, the technical effects that can be achieved by the utility model are:

[0017] In the conveying system of the utility model, the feed tank is used to input materials of the front-end system, the air compressor provides the air source, the first air outlet branch of the air compressor is connected to the bottom side wall of the feed tank to inflate and fluidize the materials at the bottom of the feed tank, so that the materials have been partially fluidized before falling into the main conveying pipeline, which not only effectively promotes pneumatic conveying, but also avoids the main conveying pipeline from being blocked by the materials, and the purpose of pneumatic conveying is achieved with the air flow in the main conveying pipeline. Specifically, the second air outlet branch of the air compressor is connected to the upstream of the main conveying pipeline to pneumatically convey the materials in the main conveying pipeline. At the same time, the third air outlet branch of the air compressor is connected to the bottom side wall of the receiving bin to inflate and fluidize the materials at the bottom of the receiving bin to facilitate the output of the materials, thereby providing a complete pneumatic conveying system;

[0018] The conveying system of the utility model is equipped with a venturi accelerator and an online ejector on the main conveying pipeline, which can increase the conveying distance and improve the working efficiency to achieve the purpose of long-distance conveying;

[0019] The conveying system of the utility model is provided with a gas circulation pipeline on the feed tank, one end of which is connected to the top of the feed tank, and the other end of which is connected to the bottom side wall of the receiving bin, so that part of the gas input into the feed tank by the first gas outlet branch of the air compressor enters the bottom of the receiving bin through the gas circulation pipeline to gasify the material at the bottom of the receiving bin, promotes the gas circulation in the feed tank, and recycles the gas in the feed tank to the receiving bin, thereby saving energy and reducing the operating cost of the system;

[0020] The conveying system of the utility model has multiple material receiving bins, and a reversing valve is arranged at the branch from the main conveying pipeline to each material receiving bin, so that one-to-multiple point conveying can be realized;

[0021] The delivery system of the utility model is equipped with a gas purification module, which can effectively remove impurities such as moisture, oil, and dust in the compressed air;

[0022] The conveying system of the utility model is equipped with a nitrogen production module. When the conveyed material cannot be in direct contact with the air, in order to achieve the purpose of pneumatic conveying, a gas that is inert or not easy to react with various media is needed to replace the controller as the medium of pneumatic conveying. Nitrogen is relatively abundant in the atmosphere and can be obtained from a relatively large container. By adopting a nitrogen production system, nitrogen with higher purity can be obtained at a lower cost to complete pneumatic conveying. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a first embodiment of a conveying system of the utility model;

[0024] Figure 2 It is a schematic diagram of a second embodiment of the delivery system of the utility model including a gas purification module;

[0025] Figure 3 It is a partial schematic diagram of a third embodiment of the delivery system of the utility model including a gas purification module and a nitrogen production module;

[0026] Figure 4 It is another partial schematic diagram of the third embodiment of the delivery system of the utility model including a gas purification module and a nitrogen production module.

[0027] in:

[0028] 111-feeding tank, 112-first gas outlet branch pipe, 113-main delivery pipeline, 114-Venturi accelerator, 115-fourth gas outlet branch pipe, 116-third gas outlet branch pipe, 117-fifth gas outlet branch pipe, 118-receiving bin, 119-second dust collector, 120-reversing valve, 121-gas recycling pipeline, 122-second gas outlet branch pipe, 123-first dust collector, 124-online ejector;

[0029] 201-clean gas buffer tank, 202-oil-water separation filter, 203-dust filter, 204-refrigerated dryer, 205-oil removal filter, 206-air compressor;

[0030] 301-activated carbon filter, 302-adsorption tank, 303-pneumatic angle valve, 304-muffler, 305-nitrogen buffer tank, 306-dew point meter, 307-flow meter. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0032] like Figure 1 As shown, the first embodiment is an embodiment of the delivery system of the utility model that is not equipped with a gas purification module and a nitrogen production module; Figure 2 As shown, the second embodiment is an embodiment of the delivery system of the utility model that is only equipped with a gas purification module and no nitrogen generation module; Figure 3-4As shown, the third embodiment is an embodiment of the delivery system of the utility model that is simultaneously equipped with a gas purification module and a nitrogen production module.

[0033] like Figure 1-4 As shown, the utility model provides a conveying system, including a feed tank 111, a receiving bin 118 and an air compressor 206. The top of the feed tank 111 is used to input materials into the front-end system, the bottom of the feed tank 111 is connected to the main conveying pipeline 113, the top of the receiving bin 118 is connected to the main conveying pipeline 113 to receive materials conveyed from the feed tank 111, the bottom of the receiving bin 118 is connected to the back-end system to output the materials, the first air outlet branch pipe 112 of the air compressor 206 is connected to the bottom side wall of the feed tank 111 to inflate and gasify the materials at the bottom of the feed tank 111, the second air outlet branch pipe 122 of the air compressor 206 is connected to the upstream of the main conveying pipeline 113 to pneumatically convey the materials in the main conveying pipeline 113, and the third air outlet branch pipe 116 of the air compressor 206 is connected to the bottom side wall of the receiving bin 118 to inflate and gasify the materials at the bottom of the receiving bin 118. Furthermore, the main conveying pipeline 113 is also provided with a venturi accelerator 114 and an online ejector 124 to accelerate the material in the main conveying pipeline 113. Furthermore, the air compressor 206 is also provided with a fourth gas outlet branch pipe 115, which is connected to the inlet of the venturi accelerator 114. Preferably, the venturi accelerator 114 and the online ejector 124 are sequentially arranged at the upstream position of the discharge port at the bottom of the feed tank 111, so that the fluidized material that falls to the main conveying pipeline 113 through the star-shaped rotary valve moves along the main conveying pipeline 113 with the accelerated airflow, and the purpose of setting the star-shaped rotary valve is to avoid the accumulation of the falling material at the bottom of the online ejector 124.

[0034] The conveying system of the utility model mainly includes the materials stored in the silo of the front-end system entering the feed tank 111 through the star-shaped rotary valve and the connecting pipe at the outlet of the silo. The feed tank 111 is provided with a first air outlet branch pipe 112 of the air compressor 206 to be first inflated and fluidized. The fluidized materials fall into the main conveying pipeline 113 by gravity. The main conveying pipeline 113 is provided with a venturi accelerator 114 and an online ejector 124 to accelerate the movement of the fluidized materials inside the main conveying pipeline 113. According to the length of the conveying distance and the flow rate of the materials in the main conveying pipeline 113, a plurality of venturi accelerators can be provided in the main conveying pipeline 113.

[0035] 114, in order to achieve the purpose of long-distance transportation.

[0036] The feed tank 111 of the conveying system of the utility model is also equipped with a gas recycling pipeline 121. A pressure transmitter is set on the gas recycling pipe to adjust the opening of the exhaust valve. One end of the gas recycling pipeline 121 is connected to the top of the feed tank 111, and the other end of the gas recycling pipeline 121 is connected to the bottom side wall of the receiving bin 118, so that part of the gas input into the feed tank 111 by the first gas outlet pipe 112 of the air compressor 206 enters the bottom of the receiving bin 118 through the gas recycling pipeline 121 to inflate and gasify the material at the bottom of the receiving bin 118, thereby promoting the gas circulation in the feed tank 111 and recycling the gas in the feed tank 111 to the receiving bin 118, thereby saving energy and reducing the system operation cost.

[0037] The feed tank 111 of the conveying system of the utility model is also equipped with a first dust collector 123, one end of the first dust collector 123 is directly connected to the top of the feed tank 111, and the other end of the first dust collector 123 is connected to the gas circulation pipeline 121 to connect to the gas in the gas circulation pipeline 121 for backwashing; at the same time, the receiving bin 118 is also equipped with a second dust collector 119, one end of the second dust collector 119 is directly connected to the top of the receiving bin 118, and the other end of the first dust collector 123 is connected to the fifth gas outlet pipe 117 of the air compressor 206 to connect to the gas output from the fifth gas outlet pipe 117 of the air compressor 206 for backwashing.

[0038] Description of the first dust collector 123 and the second dust collector 119: The first dust collector 123 and the second dust collector 119 are preferably pulse dust collectors. The feed tank 111 and the receiving bin 118 contain a mixture of gas and material, and the gas needs to be exhausted for circulation. The material in the form of powder and particles falls down. The feed tank 111 and the receiving bin 118 are equipped with a pulse flushing system to avoid the accumulation of powder and particles on the filter bags of the dust collectors, which causes exhaust blockage. The system mainly consists of a back-blowing air inlet, an air flow conveying air bag, a pulse solenoid valve, a connecting pipe, a pipe connector, an air jet pipe, an air jet pipe plugging plate, a filter layer sieve plate, a filter bag, etc. It should be noted that: if the above-mentioned exhaust gas is air, it can be directly discharged. If nitrogen is used for transportation, the exhausted nitrogen needs to be fed into the nitrogen production module and cannot be directly discharged.

[0039] The pneumatic conveying airflow of the conveying system of the utility model comes from the air compressor 206. The incoming compressed air enters the main conveying pipeline 113 through the second air outlet branch pipe 122, enters the bottom of the feed tank 111 through the first air outlet branch pipe 112, enters the bottom of the receiving bin 118 through the third air outlet branch pipe 116, enters the venturi accelerator 114 through the fourth air outlet branch pipe 115, enters the first dust collector 123 through the gas recycling pipeline 121, and enters the second dust collector 119 through the fifth air outlet branch pipe 117. Each pipeline system has a regulating valve and a stop valve to adjust and control its flow rate.

[0040] The conveying system of the present invention can be provided with multiple receiving bins 118, and a reversing valve 120 is arranged at the branch from the main conveying pipeline 113 to each receiving bin 118. The reversing valve 120 is arranged in the main conveying pipeline 113, so that one-to-many-point conveying can be realized, that is, there can be multiple receiving bins 118, and the conveyed materials are fed into the receiving bins 118, and the bin walls of the receiving bins 118 are provided with high-level material level meters, low-level material level meters, vibrating air hammers, etc.

[0041] The delivery system of the utility model further includes a gas purification module, which includes an oil removal filter 205, a refrigerated dryer 204, a dust filter 203 and an oil-water separation filter which are sequentially connected to the downstream of the air compressor 206. Furthermore, a clean gas buffer tank 201 is also arranged downstream of the gas purification module, and the clean gas buffer tank 201 is arranged upstream of the first gas outlet branch pipe 112 and the second gas outlet branch pipe 122 of the air compressor 206.

[0042] A gas purification module is added between the gas output port of the air compressor 206 and all the outlet branches of the air compressor 206. After being purified by the gas purification module, the purified air with impurities such as moisture, oil, and dust removed is connected to all the outlet branches to achieve the purpose of pneumatic transportation. The gas purification module uses a refrigerated dryer 204 as the main body, and the filter assists in purifying the compressed air. According to the direction of the compressed air flow, it is configured in sequence as a high-efficiency oil removal filter 205, a refrigerated dryer 204, a dust filter 203, an oil-water separation filter 202, and a clean air buffer tank 201. The purified air is respectively connected to the clean air buffer tank 201, the third outlet branch 116, the fourth outlet branch 115, and the fifth outlet branch 117. The airflow connected to the clean air buffer tank 201 is connected to the first outlet branch 112 and the second outlet branch 122. Each pipeline system has a regulating valve and a stop valve to adjust the controller flow.

[0043] The delivery system of the utility model also includes a nitrogen production module, which includes two adsorption tanks 302, a nitrogen buffer tank 305 and a muffler 304. The air inlet end of the adsorption tank 302 is connected to the downstream of the air compressor 206, the air inlet end of the nitrogen buffer tank 305 is connected to the air outlet end of the adsorption tank 302, the air outlet end of the nitrogen buffer tank 305 is connected to the upstream of all the air outlet branches of the air compressor 206, the air outlet end of the muffler 304 is connected to the outside atmosphere, the air inlet end of the muffler 304 is connected to the air inlet end of the adsorption tank 302 to discharge the unqualified gas before entering the adsorption tank 302, and at the same time, the air inlet end of the muffler 304 is also connected to the air outlet end of the nitrogen buffer tank 305 to discharge the unqualified nitrogen output from the nitrogen buffer tank 305. Further, an activated carbon filter 301 can be configured upstream of the nitrogen production module.

[0044] A nitrogen production module is added between the gas purification module and all the outlet pipes of the air compressor 206, so that the transported materials cannot come into contact with the purified air. Considering the characteristics of the transport medium and the easily available gas, a nitrogen production module is configured after the gas purification module, and pneumatic transportation is carried out using nitrogen with higher purity. After the compressed air passes through the purification module, it enters the nitrogen production module and obtains nitrogen with higher purity by pressure swing adsorption. The design of the nitrogen production module is relatively simple, mainly consisting of an activated carbon filter 301, two adsorption tanks 302 filled with CMS260 molecular sieves, a nitrogen buffer tank 305, ten pneumatic angle valves 303, and several local and remote transmission instruments. The nitrogen production module can have a separate PLC control system, and the control system reserves an RS485 interface and is connected to the DCS system of the main control room. Since the unqualified products only have nitrogen and oxygen with low purity, the unqualified nitrogen will be directly discharged into the atmosphere through the silencer 304, and the qualified nitrogen will be monitored by a separate flow meter 307 and a dew point meter 306 for flow and dew point.

[0045] The gas purification module and nitrogen production module configured in the conveying system of the utility model effectively avoid the contamination of the conveyed materials and ensure the quality of the products; the gasification process added to the feed tank 111 of the conveying system of the utility model enables the materials to be partially fluidized before falling into the main conveying pipeline 113, and after passing through the Venturi accelerator, the conveying distance and work efficiency can be further increased. At the same time, the conveying system of the utility model is provided with a gasification process in the feed tank 111, so that the materials are partially fluidized before falling into the conveying pipeline, which not only effectively promotes pneumatic conveying, but also avoids the materials from clogging the main conveying pipeline 113; if the conveying system of the utility model does not need the nitrogen production module to participate in the pneumatic conveying, all the gas outlet pipes of the air compressor 206 can be directly cut into after the gas purification module, and the operation is flexible; the gas purification module of the utility model not only participates in the pneumatic conveying of the main conveying pipeline 113, but also satisfies the gas used in some auxiliary pipelines, reduces the necessity of setting up other gas equipment, saves costs and improves economic benefits. It should be understood that the specific embodiments described above are only used to explain the present invention, and are not used to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A conveying system, characterized in that: include: A feed tank (111), the top of which is used to input materials from the front-end system, and the bottom of which is connected to a main conveying pipeline (113); A material receiving bin (118), the top of which is in communication with the main conveying pipeline (113) to receive the material conveyed from the feed tank (111), and the bottom of which is in communication with the downstream system to output the material; An air compressor (206), wherein the first air outlet branch pipe (112) of the air compressor (206) is connected to the bottom side wall of the feed tank (111) to perform inflation and fluidization on the material at the bottom of the feed tank (111); the second air outlet branch pipe (122) of the air compressor (206) is connected to the upstream of the main conveying pipeline (113) to perform pneumatic conveying on the material in the main conveying pipeline (113); and the third air outlet branch pipe (116) of the air compressor (206) is connected to the bottom side wall of the receiving bin (118) to perform inflation and fluidization on the material at the bottom of the receiving bin (118).

2. The conveying system according to claim 1, characterized in that The main conveying pipeline (113) is also provided with a venturi accelerator (114) and an online ejector (124) to accelerate the material in the main conveying pipeline (113).

3. The conveying system according to claim 2, characterized in that: The air compressor (206) is also equipped with a fourth air outlet branch pipe (115), and the fourth air outlet branch pipe (115) is connected to the inlet of the Venturi accelerator (114).

4. The conveying system according to claim 1, characterized in that The feed tank (111) is also provided with a gas circulation pipeline (121), one end of which is connected to the top of the feed tank (111), and the other end of which is connected to the bottom side wall of the receiving bin (118), so that part of the gas input into the feed tank (111) by the first gas outlet branch pipe (112) of the air compressor (206) enters the bottom of the receiving bin (118) through the gas circulation pipeline (121) to inflate and fluidize the material at the bottom of the receiving bin (118).

5. The conveying system according to claim 4, characterized in that: The feed tank (111) is also provided with a first dust collector (123), one end of the first dust collector (123) is directly connected to the top of the feed tank (111), and the other end of the first dust collector (123) is connected to the gas circulation pipeline (121) to access the gas in the gas circulation pipeline (121) for backwashing.

6. The conveying system according to claim 5, characterized in that: The receiving bin (118) is also provided with a second dust collector (119), one end of which is directly connected to the top of the receiving bin (118), and the other end of the first dust collector (123) is connected to the fifth gas outlet pipe (117) of the air compressor (206) to receive the gas output from the fifth gas outlet pipe (117) of the air compressor (206) for backwashing.

7. The conveying system according to claim 1, characterized in that There are a plurality of material receiving bins (118), and a reversing valve (120) is disposed at a branch from the main conveying pipeline (113) to each material receiving bin (118).

8. The conveying system according to claim 1, characterized in that It also includes a gas purification module, which includes an oil removal filter (205), a refrigerated dryer (204), a dust filter (203) and an oil-water separation filter which are sequentially connected to the downstream of the air compressor (206).

9. The conveying system according to claim 8, characterized in that A clean gas buffer tank (201) is also arranged downstream of the gas purification module. Meanwhile, the clean gas buffer tank (201) is arranged upstream of the first gas outlet branch pipe (112) and the second gas outlet branch pipe (122) of the air compressor (206).

10. The conveying system according to claim 1, characterized in that It also includes a nitrogen production module, the nitrogen production module includes: Two adsorption tanks (302), wherein the air inlet ends of the adsorption tanks (302) are connected to the downstream of the air compressor (206); A nitrogen buffer tank (305), wherein the air inlet end of the nitrogen buffer tank (305) is connected to the air outlet end of the adsorption tank (302), and the air outlet end of the nitrogen buffer tank (305) is connected to the upstream of all air outlet branch pipes of the air compressor (206); A silencer (304), wherein the outlet end of the silencer (304) is connected to the outside atmosphere, and the inlet end of the silencer (304) is connected to the inlet end of the adsorption tank (302) to discharge unqualified gas before entering the adsorption tank (302). At the same time, the inlet end of the silencer (304) is also connected to the outlet end of the nitrogen buffer tank (305) to discharge unqualified nitrogen output from the nitrogen buffer tank (305).

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