Zinc oxide centralized delivery system

Abstract

The application discloses a zinc oxide centralized conveying system and relates to the technical field of powder conveying. The system is used for centralized conveying of materials output by a plurality of discharge augers and comprises a conveying main pipe, a discharge distribution assembly is arranged between the discharge port of each discharge auger and the conveying main pipe; the discharge distribution assembly comprises a sealed discharge valve, a mixing box is arranged at the discharge port of the sealed discharge valve, and an eddy current feeding device is arranged in the mixing box; the tail end of the conveying main pipe is connected with a storage box, the storage box is provided with a negative pressure air inlet and a storage inlet, and a filtering and separating device is arranged in the storage box; the negative pressure air inlet is connected with a circulating fan, a cooling circulating pipeline is connected between the air outlet of the circulating fan and the head end of the conveying main pipe, and the eddy current feeding device is used for feeding the materials into the conveying main pipe and supplementing the air feeding amount in the conveying main pipe. The application realizes centralized collection of zinc oxide, is beneficial to reducing manual participation, improving packaging efficiency and reducing the health risk of workers.

Description

Technical Field

[0001] This invention relates to the field of powder conveying technology, and more particularly to a centralized zinc oxide conveying system. Background Technology

[0002] The indirect zinc oxide production system, as disclosed in utility model patent CN221298745U, includes a boiler, an oxidation chamber, cooling and conveying pipes, and collection equipment. Zinc vapor continuously produced in the boiler is injected into the oxidation chamber for oxidation, producing zinc oxide particles. These particles are then transported via the cooling and conveying pipes to the collection equipment for collection, yielding the finished zinc oxide product. The collection equipment typically includes four to five sets of collection devices for collecting the zinc oxide particles. Each set includes an upper air distribution box, a lower collection hopper, and several collection bags between the air distribution box and the collection hopper. The airflow containing zinc oxide particles is guided through the air distribution box to each collection bag. The gas escapes from the micropores of the collection bags, while the particles are blocked by the bags. The blocked zinc oxide particles eventually fall into the lower collection hopper for collection. Each collection hopper is equipped with a discharge auger to discharge the zinc oxide for packaging.

[0003] Traditional zinc oxide packaging operations use mobile loading trolleys, such as... Figure 9 As shown, the loading trolley is equipped with a lifting auger. During packaging operations, the inlet of the lifting auger is first connected to the outlet of the discharge auger, and then the opening of the packaging bag is tied to the outlet of the lifting auger. The zinc oxide output by the discharge auger is then fed into the packaging bag. Once the packaging bag is observed to be nearly full, the lifting and discharge augers are stopped, the packaging bag is replaced, and the nearly full bag is transferred to the sealing process for precise weighing and sealing.

[0004] The traditional operation mode has the following disadvantages. Firstly, multiple sets of zinc oxide production systems are configured in a workshop, and the total number of discharge augers can reach more than 30-40, and the average daily discharge amount of each discharge auger is about 5 tons, so the discharge auger discharge frequency is relatively high, and multiple charging trolleys are required to be configured in the workshop for packaging, and multiple people are required to cooperate to connect the charging trolley, start and stop the auger, and replace the packaging bag, and the labor intensity is large, but the packaging efficiency is low. Secondly, when the 50kg specification packaging bag is basically filled, the filling amount is relatively close to the specification capacity, but when the 500kg large specification packaging bag is basically filled, the actual filling amount and the specification capacity will have a large error, and the filling amount needs to be increased or decreased by manual operation with a shovel and other tools in the subsequent packaging process, which further increases the packaging complexity and reduces the packaging efficiency. In addition, the large specification packaging bag often cannot be filled when the collection hopper discharges, and the charging trolley needs to be disconnected and transferred to the next collection hopper for reconnection and continuous bagging, which also increases the packaging complexity and reduces the packaging efficiency. Thirdly, the collected zinc oxide is a very fine material with a particle size of 0.1-10 microns, and the packaging process inevitably causes flying, and the flying zinc oxide particles will be inhaled into the respiratory tract even with respiratory protection, and may also cause acute irritation to the eyes and other parts, so that the workers in the above packaging operation environment have certain health risks for a long time.

[0005] Therefore, the inventors improve the discharge and packaging of zinc oxide to reduce manual participation, improve packaging efficiency and reduce the health risk of workers, and the invention is created accordingly. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a zinc oxide centralized conveying system which realizes centralized collection of zinc oxide, reduces manual participation, improves packaging efficiency and reduces the health risk of workers.

[0007] To solve the above technical problems, the technical scheme of the present application is: a zinc oxide centralized conveying system for centralized conveying of materials output by a plurality of discharge augers of a collection device, comprising a conveying main pipe located at the plurality of discharge augers, and a discharge distribution assembly is arranged between the discharge port of each discharge auger and the conveying main pipe.

[0008] The discharge distribution assembly comprises a sealing discharge valve installed at the discharge port of the discharge auger, a mixing box is installed at the discharge port of the sealing discharge valve, a vortex feeding device is installed in the mixing box, and a guide pipe is arranged between the discharge port of the mixing box and the conveying main pipe;

[0009] The end of the conveying main pipe is connected with a storage box, the storage box is provided with a negative pressure air inlet and a storage inlet for connecting the conveying main pipe, a filter separation device is arranged between the storage inlet and the negative pressure air inlet in the storage box;

[0010] The negative pressure air inlet is connected with a circulating fan, a cooling circulating pipeline is connected between the air outlet of the circulating fan and the head end of the conveying main pipe, and the vortex feeding device is used to blow the material into the conveying main pipe and supplement the air blowing amount in the conveying main pipe.

[0011] As a preferred technical solution, a material dispersion device is installed above the vortex feeding device in the mixing box.

[0012] As a preferred technical solution, the material dispersion device comprises a plurality of cyclone nozzles installed on the side wall of the mixing box, and a cyclone control valve is connected to the cyclone nozzles; a material dispersion grid is installed between the cyclone nozzles and the vortex feeding device in the mixing box, a grid hanging belt is connected between the material dispersion grid and the top wall of the mixing box, and a collision protection pad is fixedly arranged on the side wall of the mixing box at the material dispersion grid.

[0013] As a preferred technical solution, the vortex feeding device comprises a plurality of vortex nozzles installed on the side wall of the mixing box, and the vortex nozzles are arranged to be inclined downward along the circumference of the mixing box; and a vortex air supply device is connected to the common pipeline of the vortex nozzles.

[0014] As a preferred technical solution, at least two adjacent discharge augers form a group, and the vortex nozzles corresponding to the discharge augers in the same group are connected to the same vortex air supply device.

[0015] As a preferred technical solution, the filter separation device comprises an air chamber partition plate fixedly arranged in the storage box in a transverse direction, the air chamber partition plate divides the internal space of the storage box into a lower storage chamber and an upper air chamber, the storage inlet is arranged on the chamber wall of the storage chamber, and the negative pressure air inlet is arranged on the chamber wall of the air chamber; a plurality of air passing holes are arranged on the air chamber partition plate, and a filter bag assembly is arranged in the storage chamber at each air passing hole.

[0016] As a preferred technical scheme, the discharging auger comprises a discharging cylinder, a discharging auger spiral blade is arranged in the discharging cylinder, and a discharging driver is connected to the discharging auger spiral blade; a concentrated output port is arranged at one end of the discharging cylinder, and an independent output port is arranged at the other end of the discharging cylinder; the concentrated output port is used for outputting the material to the conveying main pipe; the discharging driver drives the discharging auger spiral blade to rotate in the forward direction, and the concentrated output port discharges the material; and the discharging driver drives the discharging auger spiral blade to rotate in the reverse direction, and the independent output port discharges the material.

[0017] As a preferred technical scheme, a rapping device is arranged on the outer surface of the conveying main pipe.

[0018] As a preferred technical scheme, an automatic exhaust valve is arranged on the cooling circulation pipeline.

[0019] Due to the adoption of the above technical scheme, the present application has the following beneficial effects:

[0020] (1) The zinc oxide collected in each collecting device is concentrated and conveyed to the storage tank in a gas conveying manner, so as to facilitate subsequent automatic packaging operation of the continuous packaging device matched with the storage tank, thereby reducing the labor participation, improving the packaging efficiency, and reducing the health risk of the workers;

[0021] (2) The gas conveying pipeline of the present application forms a closed loop, the circulating fan provides the main gas conveying power, the air outlet of the circulating fan is circulated to the conveying main pipe for secondary gas conveying, which can significantly reduce the configuration of the air distribution device and reduce the system cost;

[0022] (3) The zinc oxide output by each discharging auger is discharged to the mixing tank through the sealed discharge valve, and then is drummed into the conveying main pipe in a vortex manner by the vortex feeding device; the zinc oxide has good dispersibility after entering the conveying main pipe, which can significantly reduce the deposition and fouling; and the vortex feeding device is also used for supplementing the air volume, so that the conveying main pipe maintains sufficient air force, and the ideal concentration conveying purpose is achieved without obvious deposition and fouling;

[0023] (4) The present application adopts the conveying main pipe gas conveying, which can avoid the influence of ground iron filings and the wall scraping hardening problem, and is conducive to cooperating with multiple production systems to continuously perform the centralized collection operation and ensure the product quality. BRIEF DESCRIPTION OF DRAWINGS

[0024] The following drawings are only intended to illustrate and explain the present application, and do not limit the scope of the present application. Among them:

[0025] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0026] Figure 2is Figure 1 a top view structural schematic diagram of the present application;

[0027] Figure 3 is Figure 1 an enlarged structural schematic diagram of one of the discharge distribution assemblies in the present application;

[0028] Figure 4 is Figure 3 an A-A structural schematic diagram in the present application;

[0029] Figure 5 is Figure 3 a B-B structural schematic diagram in the present application;

[0030] Figure 6 is Figure 3 a C-C structural enlarged schematic diagram in the present application;

[0031] Figure 7 is Figure 3 a D-D structural schematic diagram in the present application;

[0032] Figure 8 is Figure 2 an E-E structural schematic diagram in the present application;

[0033] Figure 9 is a structural schematic diagram of the prior art using a charging trolley for bagging.

[0034] In the figure: 1 - collecting device; 11 - discharge auger; 12 - discharge cylinder; 13 - auger helical blade; 14 - concentrated output port; 15 - independent output port; 16 - air distribution box; 17 - collecting hopper; 18 - collecting cloth bag; 2 - conveying main pipe; 3 - discharge distribution assembly; 31 - sealed discharge valve; 32 - mixing box; 33 - material guide pipe; 4 - vortex feeding device; 41 - vortex nozzle; 42 - vortex air supply device; 5 - material dispersing device; 51 - cyclone nozzle; 52 - cyclone control valve; 53 - bulk material grid; 54 - grid hanging belt; 55 - collision protection pad; 56 - support ring; 57 - grid transverse rib; 58 - grid longitudinal rib; 6 - storage tank; 61 - storage inlet; 62 - negative pressure air port; 63 - storage outlet; 7 - filtering and separating device; 71 - air chamber partition; 72 - filter bag assembly; 73 - backflushing pipe; 74 - pulse valve; 75 - air pocket; 76 - backflushing nozzle; 8 - circulating fan; 81 - cooling circulating pipeline; 82 - automatic exhaust valve; 9 - charging trolley; 91 - lifting auger; 92 - packaging bag. DETAILED DESCRIPTION

[0035] The application will be further described below in conjunction with the drawings and examples. In the following detailed description of the application, certain exemplary embodiments of the application are described by way of illustration only. It will be apparent to those skilled in the art that the embodiments described can be practiced in a variety of different ways without departing from the spirit and scope of the application. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0036] A zinc oxide centralized conveying system is used for centralized conveying of materials output by a plurality of discharge augers 11 at a collecting device 1. As shown in Figure 1 and Figure 8 , the discharge auger 11 in the collecting device 1 is installed at the lower part of a corresponding collecting hopper 17, and more specifically, the discharge auger 11 comprises a discharge cylinder 12, in which a discharge auger helical blade 13 is installed, and the discharge auger helical blade 13 is connected with a discharge driver; a discharge port is formed at the lower part of one end of the discharge cylinder 12, and when the discharge driver drives the discharge auger helical blade 13 to rotate, the discharge auger helical blade 13 pushes the zinc oxide to the discharge port, and the zinc oxide freely falls from the discharge port to form an output. The structure and principle of the above discharge auger 11 are known technologies, and will not be described here.

[0037] As shown in Figure 1 and Figure 2 , the system comprises a conveying main pipe 2 at a plurality of the discharge augers 11, and a discharge distribution assembly 3 is respectively arranged between the discharge port of each of the discharge augers 11 and the conveying main pipe 2. The discharge distribution assembly 3 is used for distributing the zinc oxide output by the corresponding discharge auger 11 to the conveying main pipe 2, and the discharge distribution assembly 3 works when the corresponding discharge auger 11 discharges, and the discharge distribution assembly 3 does not work when the corresponding discharge auger 11 does not discharge. The conveying main pipe 2 receives the zinc oxide output by each of the discharge augers 11 as a common pipeline, and performs centralized conveying.

[0038] As shown in Figure 3 and Figure 7 , the discharge distribution assembly 3 comprises a sealing discharge valve 31 installed at the discharge port of the corresponding discharge auger 11, a mixing box 32 is installed at the discharge port of the sealing discharge valve 31, a vortex feeding device 4 is installed in the mixing box 32, and a material guide pipe 33 is arranged between the discharge port of the mixing box 32 and the conveying main pipe 2.

[0039] The zinc oxide outputted by the discharging auger 11 is discharged into the mixing box 32 through the sealing discharging valve 31, and then is inhaled into the conveying main pipe 2 in the form of vortex through the vortex feeding device 4. The zinc oxide is well dispersed after entering the conveying main pipe 2, and the deposition and fouling can be greatly reduced. The vortex feeding device 4 is also used to supplement the air volume, so that the air force in the section of the conveying main pipe 2 is still sufficient, and the ideal centralized conveying purpose is achieved without obvious deposition and fouling.

[0040] The sealing discharging valve 31 is used to isolate the discharging auger 11 and the mixing box 32, so that the air leakage of the branch pipe does not affect the air feeding force in the conveying main pipe 2 when the discharging auger 11 does not output zinc oxide. The sealing discharging valve 31 can adopt a common star-shaped discharging valve, and the structure principle and the sealing effect on the upstream and downstream spaces are known, which will not be described here.

[0041] As shown in Figure 3 , Figure 5 and Figure 7 , the vortex feeding device 4 comprises a plurality of vortex nozzles 41 installed on the side wall of the mixing box 32, and the vortex nozzles 41 are arranged to be obliquely downward along the circumference of the mixing box 32. The vortex nozzles 41 are connected with a vortex gas supply device 42 in common. Conventionally, the vortex gas supply device 42 comprises a vortex gas supply gas tank, a vortex gas supply air compressor and a vortex gas supply control valve, and a plurality of vortex nozzles 41 at each mixing box 32 share one vortex gas supply control valve.

[0042] When the vortex gas supply control valve is opened, the high-pressure gas in the vortex gas supply gas tank is sprayed from the vortex nozzles 41. The plurality of vortex nozzles 41 utilize the angle of oblique downward along the circumferential direction to promote the formation of vortex airflow in the mixing box 32. The zinc oxide falling into the vortex airflow is dispersed under the action of vortex, and is flushed into the conveying main pipe 2 through the material guide pipe 33 under the driving of the vortex airflow. Accordingly, the zinc oxide is in a good dispersed state and is inhaled into the conveying main pipe 2, and the vortex airflow of the vortex feeding device 4 supplements the air volume of the corresponding position of the conveying main pipe 2, which is beneficial to reduce the influence of the resistance along the way and ensure the air feeding force in the long-distance air feeding of the conveying main pipe 2.

[0043] As shown in Figure 1 and Figure 3As shown, the material guide pipe 33 is preferably arranged obliquely to the conveying direction of the conveying main pipe 2, thereby reducing the direct impact of the vortex gas flow on the conveying main pipe 2 and facilitating the formation of the impact in accordance with the direction of the gas flow in the conveying main pipe 2. More preferably, the material guide pipe 33 preferably adopts a curved pipe, the smooth inner surface of which can facilitate the reduction of zinc oxide impact and adhesion, and the curvature radius of the material guide pipe 33 is 2-3 times the diameter of the material guide pipe 33, so as to facilitate the formation of a better smooth guide effect.

[0044] Preferably, as shown in Figure 5 At least two adjacent discharge augers 11 form a group, and the vortex nozzles 41 corresponding to the discharge augers 11 in the same group are connected to the same vortex gas supply device 42, thereby reducing the equipment configuration and facilitating the reduction of system cost. In actual production, a set of zinc oxide production system corresponds to four to five discharge augers 11, and the zinc oxide collection and output processes of these discharge augers 11 are relatively synchronized, so it is preferred that the discharge augers 11 corresponding to a set of production system form a group. Thus, during discharging, the discharge augers 11 are taken as a unit, and after the discharging of the current group of discharge augers 11 is completed, the discharging of the next group of discharge augers 11 is performed, and the process is repeated in sequence, which can maintain the stability of the dust-containing gas flow concentration in the conveying main pipe 2 within a unit time, and facilitate the smooth centralized conveying.

[0045] Preferably, as shown in Figure 3 and Figure 7 A material dispersing device 5 is installed above the vortex material feeding device 4 in the mixing box 32, so that the discharged material is first dispersed and then enters the vortex, which can further facilitate the dispersion of zinc oxide and avoid deposition and fouling.

[0046] As shown in Figure 3 , Figure 4 and Figure 7As shown, the material dispersion device 5 comprises several cyclone nozzles 51 installed on the side wall of the mixing box 32, and the cyclone control valve 52 is connected to the cyclone nozzles 51. In the case of vortex output, there is a significant negative pressure area between the vortex nozzle 41 and the discharge port of the sealing discharge valve 31 in the lower part of the mixing box 32, which will form a suction force on the zinc oxide that does not enter the sealing discharge valve 31 based on the gap of the sealing discharge valve 31, and macroscopically cause the agglomeration of zinc oxide. The embodiment adds the cyclone nozzles 51, and after the cyclone control valve 52 is opened, the negative pressure area is directly connected to the external atmosphere, which can significantly relieve the negative pressure suction force at the sealing discharge valve 31, reduce agglomeration, and the negative pressure suction force is instead absorbed by the external air through the cyclone control valve 52, forming a blast at the cyclone nozzles 51, which can have a certain blowing effect on the discharge. Based on this, the mixing box 32 can form an airflow effect from the top of the sealing discharge valve 31 to the discharge port, and the dispersion effect of the zinc oxide is significant. Preferably, the cyclone nozzles 51 are installed in the mixing box 32 in a diagonal direction along the circumference of the mixing box 32 to promote the formation of cyclone air flow, and to maximize the blowing effect. Among them, a filter should be added at the cyclone control valve 52 to filter the external air. Of course, when the discharge auger 11 is not discharging, the cyclone control valve 52 is closed to isolate the external atmosphere, which cooperates with the sealing discharge valve 31 to stop the influence of branch air leakage on the main pipe air supply.

[0047] Further, as shown in Figure 3 and Figure 7 The mixing box 32 is installed between the cyclone nozzles 51 and the vortex feeding device 4, and the grid hanger 54 is connected between the mixing box 32 and the top wall of the mixing box 32. The collision protection pad 55 is fixed on the side wall of the mixing box 32 at the location of the dispersion grid 53. The zinc oxide dispersed by the cyclone nozzles 51 falls freely onto the dispersion grid 53, and the passive impact promotes the forced breaking of the agglomerated zinc oxide that may exist and has not been dispersed, further promoting the dispersion of the zinc oxide.

[0048] The bulk material grid 53 is arranged as a floating grid, which can produce passive activity when impacted by zinc oxide and affected by wind flow, which is reflected in the lateral swinging and slight vertical jumping of the bulk material grid 53. In the lateral swinging, the bulk material grid 53 collides with the impact protection pad 55, thereby the bulk material grid 53 is easy to shake off the zinc oxide that may be adhered thereon, promoting long-term grid crushing effect. At the same time, the collision can also promote the zinc oxide that may be adhered on the side wall of the mixing box 32 and the impact protection pad 55 to fall off, reducing internal adhesion. In addition, the impact protection pad 55 is used to avoid rigid collision between the bulk material grid 53 and the side wall of the mixing box 32, so as to avoid structural deformation caused by rigid collision and avoid metal debris caused by collision. Since the zinc oxide output at the collection device 1 is high-quality zinc oxide and is mainly used in the downstream tire industry, the impact protection pad 55 is preferably made of polytetrafluoroethylene material, which is one of the raw materials for tire manufacturing. Even if polytetrafluoroethylene debris appears in the collision, it is not considered as impurities, which is beneficial to simplify the later impurity removal process. Similarly, the grid lifting belt 54 is also preferably made of a polytetrafluoroethylene rope.

[0049] More specifically, as shown in Figure 6 The bulk material grid 53 includes a support ring 56, and a plurality of grid transverse ribs 57 and grid longitudinal ribs 58 are fixedly welded on the inner side of the support ring 56. The support ring 56 is a rigid support with high strength, which ensures that the bulk material grid 53 does not deform during activities and collisions, and facilitates lifting as a carrier connected by the grid lifting belt 54. The grid transverse ribs 57 and the grid longitudinal ribs 58 form a grid structure together, which can promote the crushing of the zinc oxide agglomerates. Preferably, the grid transverse ribs 57 and the grid longitudinal ribs 58 are arranged in an arc shape with low middle and high ends, so that the grid structure formed by the grid transverse ribs 57 and the grid longitudinal ribs 58 is roughly pot-shaped, which can reduce the splashing of zinc oxide when impacted, and is beneficial to reduce the adhesion probability of zinc oxide at the side wall of the mixing box 32 and the impact protection pad 55.

[0050] Preferably, a rapping device is installed on the outer surface of the conveying main pipe 2, which can vibrate and fall off a small amount of zinc oxide that may be adhered to the inner surface of the conveying main pipe 2, further reducing zinc oxide adhesion and reducing fouling and blockage. Since the inside of the conveying main pipe 2 is mainly deposited with zinc oxide, adhesion is easy to occur at the bottom of the pipe, so the rapping device is preferably installed at the side of the lower half of the conveying main pipe 2, so as to produce better amplitude in a closer distance from the deposition site, promoting better rapping effect. The type of the rapping device is not limited here.

[0051] Preferably, the inner surface of the conveying pipe 2 is provided with a drag-reducing coating to reduce the adhesion of zinc oxide to the inner surface of the conveying pipe 2, reduce fouling and plugging while reducing the flow resistance along the pipe. The drag-reducing coating is also preferably a PTFE coating with a thickness of preferably 40-60 μm; if necessary, a zinc yellow epoxy coating can be used as a primer, with a thickness of 20-40 μm. Accordingly, the conveying pipe 2 can be made directly from a common seamless steel pipe, which is low in cost and good in processability.

[0052] As shown in Figure 1 and Figure 2 , the end of the conveying pipe 2 is connected to a storage tank 6 for collecting the conveyed zinc oxide. The storage tank 6 is provided with a negative pressure air inlet 62 and a storage inlet 61 for connecting the conveying pipe 2, and a filter separation device 7 is arranged in the storage tank 6 between the storage inlet 61 and the negative pressure air inlet 62. The negative pressure air inlet 62 is connected to a circulating fan 8, which provides air flow from the storage inlet 61 to the negative pressure air inlet 62. After the powder-containing air flow passes through the filter separation device 7, the zinc oxide is blocked and the clean air flows out through the negative pressure air inlet 62; the blocked zinc oxide gradually deposits at the bottom of the storage tank 6. Accordingly, the bottom of the storage tank 6 is preferably provided with a storage outlet 63 for outputting the zinc oxide for packaging and other operations.

[0053] As shown in Figure 1 , the filter separation device 7 of the present embodiment includes a gas chamber partition 71 fixed transversely in the storage tank 6, which divides the internal space of the storage tank 6 into a lower storage chamber and an upper ventilation chamber. The storage inlet 61 is located on the chamber wall of the storage chamber, and the negative pressure air inlet 62 is located on the chamber wall of the ventilation chamber. The gas chamber partition 71 is provided with a plurality of air passing holes, and each air passing hole is provided with a filter bag assembly 72 located in the storage chamber. Further, the filter bag assembly 72 includes an inner filter bag support and an outer filter cloth bag. The filter bag support provides support for the filter cloth bag to prevent excessive deformation of the filter cloth bag due to wind flow impact, and does not affect the filtering area of the filter cloth bag. Accordingly, the filter support can be realized in the form of a cylindrical grid structure made of metal wires.

[0054] Preferably, as shown in Figure 1As shown, the storage tank 6 is provided with a back flushing pipe 73 in the air chamber, the back flushing pipe 73 is provided with back flushing nozzles 76 for blowing into each filter bag assembly 72, the back flushing pipe 73 extends out of the storage tank 6 and is connected with pulse valves 74 and air pockets 75. The air pockets 75 are filled with high pressure gas, the pulse valves 74 are controlled to be opened intermittently, and a plurality of pulse valves 74 are opened in a certain cycle sequence. When the pulse valves 74 are opened, the high pressure gas in the air pockets 75 is blown into the corresponding filter bag assembly 72 through the back flushing pipe 73 and the back flushing nozzles 76, so as to shake off the zinc oxide adhered on the filter bag assembly 72 by instantaneous impact, and make the zinc oxide fall into the bottom of the storage tank, and keep the solid-gas separation function of the filter bag assembly 72.

[0055] As shown in Figure 1 and Figure 2 As shown, the outlet of the circulating fan 8 is connected with the first end of the conveying main pipe 2 through a cooling circulation pipeline 81, so that the air conveying pipeline forms a closed loop, the circulating fan 8 provides main air conveying power, the air outlet of the circulating fan 8 circulates to the conveying main pipe 2 for secondary air conveying, which can significantly reduce the configuration of air distribution equipment, and is conducive to reducing the system cost. The vortex feeding device 4 is used to blow material into the conveying main pipe 2 and supplement the air conveying amount in the conveying main pipe 2, so as to reduce the operating load of the circulating fan 8, and the main air conveying of the circulating fan 8 and the air supplement of the vortex feeding device 4 can cooperate to ensure that the conveying main pipe 2 maintains the required air conveying power. The whole system mainly consumes energy at two places, the circulating fan 8 and the vortex air supply device 42, and the operating energy consumption is relatively low. Among them, in addition to promoting the closed loop of the air conveying pipeline, the cooling circulation pipeline 81 also promotes the natural cooling of the air flow through the longer flow path, reducing the influence of equipment heat and the like on air conveying. The circulating fan 8 is preferably a high-efficiency sealed centrifugal fan, so as to avoid the influence of lubricating oil and the like in the fan on the pipeline environment. Such a fan is prior art known to those skilled in the art, and will not be described here.

[0056] In addition, based on the air supplement of the vortex feeding device 4, the gas amount in the closed loop pipeline will gradually increase, and the gas pressure will increase, so as shown in Figure 1 the cooling circulation pipeline 81 of the embodiment is provided with an automatic exhaust valve 82, so as to automatically exhaust the gas in the closed loop pipeline to keep the gas pressure stable. In actual setting, a pressure detector is preferably arranged on the cooling circulation pipeline 81 to detect the gas flow pressure in the cooling circulation pipeline 81 in real time. When the gas flow pressure exceeds a set value, a feedback signal is fed back to a controller to control the automatic exhaust valve 82 to exhaust. Based on this, during the operation of the system, the closed loop pipeline forms a continuous ventilation state of vortex air intake at the discharge position and automatic exhaust of the automatic exhaust valve 82, which can effectively avoid the accumulation of water in the pipeline, and further reduce the agglomeration and fouling.

[0057] In actual production, the quality of zinc oxide at each of the discharge augers 11 may differ due to differences in raw materials, external environment, equipment layout, etc., and may produce zinc oxide of higher quality than conventional zinc oxide or zinc oxide of substandard quality. Figure 8 As shown in the drawings, one end of the discharge cylinder 12 is provided with a concentrated output port 14 for outputting material to the conveying main pipe 2, and the other end is provided with an independent output port 15. When the discharge drive drives the auger helical blade 13 to rotate forward, the concentrated output port 14 discharges, and when the discharge drive drives the auger helical blade 13 to rotate reversely, the independent output port 15 discharges. Through the above-mentioned double discharge port setting, when zinc oxide of higher quality or zinc oxide of substandard quality appears, the discharge drive drives the auger helical blade 13 to rotate reversely, which can be output and collected separately.

[0058] The embodiment adopts air feeding to concentrate the zinc oxide collected at each of the collection devices 1 into the storage tank 6, so as to facilitate subsequent automatic packaging operation in the storage tank 6 matched with continuous packaging equipment, thereby being beneficial to reduce manual participation, improve packaging efficiency, and reduce health risks of workers. At each of the discharge augers 11, a sealed discharge valve 31 is used for discharging and space separation, and the discharged material is blown, scattered, and mixed by vortex to be blown into the conveying main pipe 2, so that the zinc oxide has good dispersibility, less deposition, and less scaling. Vortex air feeding can also supplement the conveying air volume, so that at least the section of the pipe from the zinc oxide input main pipe to the storage tank 6 can maintain sufficient air volume, so as to achieve the purpose of concentrated conveying. Compared with the long-stroke auger, the air feeding can avoid the influence of ground iron filings and the problem of wall scraping and hardening, and is beneficial to cooperate with multiple production systems to continuously perform concentrated collection operation and ensure product quality. The embodiment further adopts pipe closed loop design, which can reduce equipment configuration and operating energy consumption, and is beneficial to reduce system cost.

[0059] The basic principles, main features, and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A centralized zinc oxide conveying system, used for centralized conveying of materials output from several discharge augers at a collection device, characterized in that: It includes a conveying main pipe located at several of the aforementioned discharge augers, and a discharge delivery assembly is provided between the discharge port of each of the aforementioned discharge augers and the conveying main pipe; The discharge and delivery assembly includes a sealed discharge valve installed at the discharge port corresponding to the discharge auger, a mixing box installed at the discharge port of the sealed discharge valve, a vortex feeding device installed inside the mixing box, and a material dispersing device installed above the vortex feeding device inside the mixing box; a guide pipe is provided between the discharge port of the mixing box and the main conveying pipe. The end of the conveying main pipe is connected to a receiving and storage box. The receiving and storage box is provided with a negative pressure air outlet and a receiving and storage inlet for connecting the conveying main pipe. A filter separation device is provided inside the receiving and storage box between the receiving and storage inlet and the negative pressure air outlet. The negative pressure air outlet is connected to a circulating fan, and a cooling circulation pipe is connected between the air outlet of the circulating fan and the beginning of the conveying main pipe. The vortex feeding device is used to blow the material into the conveying main pipe and replenish the air volume in the conveying main pipe. The material dispersion device includes several swirling nozzles installed on the side wall of the mixing box, and the swirling nozzles are connected to swirling control valves; a bulk material grid is installed inside the mixing box between the swirling nozzles and the vortex feeding device, and a grid sling is connected between the bulk material grid and the top wall of the mixing box; a collision protection pad located at the bulk material grid is fixed on the side wall of the mixing box.

2. The centralized zinc oxide conveying system as described in claim 1, characterized in that: The vortex feeding device includes a plurality of vortex nozzles installed on the side wall of the mixing box, and the vortex nozzles are arranged to spray obliquely downward along the circumference of the mixing box; the vortex nozzles are connected to a vortex air supply device via a common pipeline.

3. The centralized zinc oxide conveying system as described in claim 2, characterized in that: At least two adjacent discharge augers form a group, and the vortex nozzles corresponding to the discharge augers in the same group are connected to the same vortex air supply device via a common pipeline.

4. The centralized zinc oxide conveying system as described in claim 1, characterized in that: The filtration and separation device includes a gas chamber partition that is horizontally fixed inside the storage box. The gas chamber partition divides the internal space of the storage box into a lower storage chamber and an upper ventilation chamber. The storage inlet is located on the wall of the storage chamber, and the negative pressure air outlet is located on the wall of the ventilation chamber. The gas chamber partition is provided with a plurality of air passage holes, and filter bag assemblies located inside the storage chamber are respectively installed at the air passage holes.

5. The centralized zinc oxide conveying system as described in claim 1, characterized in that: The discharge auger includes a discharge cylinder, inside which are installed auger spiral blades connected to a discharge driver. One end of the discharge cylinder has a centralized discharge port and the other end has an independent discharge port. The centralized discharge port is used to discharge material to the conveying main pipe. When the discharge driver drives the auger spiral blades to rotate forward, material is discharged from the centralized discharge port. When the discharge driver drives the auger spiral blades to rotate in reverse, material is discharged from the independent discharge port.

6. The centralized zinc oxide conveying system as described in claim 1, characterized in that: A vibrator is installed on the outer surface of the main conveyor pipe.

7. The centralized zinc oxide conveying system according to any one of claims 1 to 6, characterized in that: An automatic vent valve is installed on the cooling circulation pipeline.

Images