Chromium oxide pneumatic transportation system and its transportation process

Abstract

The present disclosure provides a kind of chrome oxide pneumatic transportation system and its transportation process.The above-mentioned chrome oxide pneumatic transportation system includes ton bag unpacking station, ton bag unpacking station includes frame, travelling crane, glove operation box and ton bag clamping device, travelling crane and glove operation box are all installed on frame, travelling crane is used to fix ton bag and make ton bag move, ton bag clamping device is arranged on one end of glove operation box, ton bag clamping device is used to clamp the discharge end of ton bag and make the discharge end of ton bag be located in glove operation box;Chrome oxide pneumatic transportation system further includes dense phase pump, conveying pipeline, feeding assembly and compressed gas input assembly.The feeding end of dense phase pump is communicated with the other end of glove operation box.The one end of conveying pipeline is communicated with the discharge end of dense phase pump.The other end of conveying pipeline is communicated with the feeding end of feeding assembly.The gas inlet end of compressed gas input assembly is communicated with compressed gas source, and the gas outlet end of compressed gas input assembly is communicated with the gas inlet end of dense phase pump.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of lithium batteries, in particular to a chromium oxide pneumatic transportation system and a transportation process thereof. BACKGROUND

[0002] Metal oxides, such as chromium oxide, aluminum oxide, iron oxide, zinc oxide, etc., which are widely used materials in the industrial field, play an important role in the industries of lithium batteries, ceramics, catalysts, electronic materials, refractory materials, etc.

[0003] Chromium oxide can be used as a raw material for the manufacture of lithium battery positive materials. Many lithium battery plants purchase chromium oxide in ton bags, which are sealed and loaded by ton bag clamping devices. The ton bag outlet is clamped and sealed, and then cut open by a glove box to discharge the contents into a storage bin. The traditional transportation method is to use a suction pump to transport the chromium oxide powder in the storage bin to a feeding bin through a pipeline. However, due to the limited output power of the suction pump, once the length of the conveying pipeline is increased, the conveying pipeline may be easily blocked by accumulated material, thereby affecting the feeding rate of the chromium oxide powder and further affecting the production efficiency.

[0004] Therefore, how to achieve efficient transportation in a long conveying pipeline is a problem that needs to be solved at present. SUMMARY

[0005] The purpose of the present disclosure is to overcome the shortcomings of the prior art and provide a chromium oxide pneumatic transportation system and a transportation process thereof that can avoid the accumulation or blockage of the conveying pipeline.

[0006] The purpose of the present disclosure is achieved by the following technical solutions:

[0007] A chromium oxide pneumatic transportation system, comprising a ton bag unpacking station, the ton bag unpacking station comprising a frame, a travelling crane, a glove operating box and a ton bag clamping device, the travelling crane and the glove operating box being mounted on the frame, the travelling crane being used for fixing and moving the ton bag, the ton bag clamping device being arranged on one end of the glove operating box, the ton bag clamping device being used for clamping the discharge end of the ton bag and making the discharge end of the ton bag located in the glove operating box;

[0008] The chromium oxide pneumatic transportation system further comprises:

[0009] a dense phase pump, the feeding end of the dense phase pump being in communication with the other end of the glove operating box;

[0010] a conveying pipeline, one end of the conveying pipeline being in communication with the discharging end of the dense phase pump;

[0011] a feeding assembly, the other end of the conveying pipeline being in communication with the feeding end of the feeding assembly;

[0012] A compressed gas input assembly, a gas inlet end of the compressed gas input assembly is communicated with the compressed gas source, a gas outlet end of the compressed gas input assembly is communicated with the gas inlet end of the dense phase pump.

[0013] In one of the embodiments, the chromium oxide pneumatic conveying system further comprises a first pneumatic on-off valve, the first pneumatic on-off valve is arranged on the conveying pipeline.

[0014] In one of the embodiments, the feeding assembly comprises a feeding bin and a mixing bin, a feeding inlet end of the feeding bin is communicated with the other end of the conveying pipeline, a feeding outlet end of the feeding bin is communicated with a feeding inlet end of the mixing bin.

[0015] In one of the embodiments, the compressed gas input assembly comprises a compressed gas input main pipe, a plurality of compressed gas input branch pipes, a plurality of first electromagnetic on-off valves, a plurality of first pressure reducing valves and a plurality of second pneumatic on-off valves, one end of the compressed gas input main pipe is communicated with the compressed gas source, the other end of the compressed gas input main pipe is respectively communicated with one end of each of the plurality of compressed gas input branch pipes, the other end of each of the compressed gas input branch pipes is communicated with a corresponding gas inlet end of the dense phase pump, each of the first electromagnetic on-off valve, the first pressure reducing valve and the second pneumatic on-off valve is sequentially arranged on the corresponding compressed gas input branch pipe in the gas inlet direction.

[0016] In one of the embodiments, the chromium oxide pneumatic conveying system further comprises a round top valve, one end of the round top valve is communicated with the other end of the glove box, the other end of the round top valve is communicated with the feeding inlet end of the dense phase pump.

[0017] In one of the embodiments, the chromium oxide pneumatic conveying system further comprises a dust removal device, the dust removal device comprises a dust removal pipeline, a third pneumatic on-off valve, a single-point dust collector, a pulse back-blowing device and an exhaust pipeline, one end of the dust removal pipeline is communicated with the dust outlet of the dense phase pump, the third pneumatic on-off valve and the single-point dust collector are arranged on the dust removal pipeline, one end of the pulse back-blowing device is communicated with the compressed gas source, the other end of the pulse back-blowing device is communicated with the gas inlet end of the single-point dust collector, one end of the exhaust pipeline is communicated with the other end of the dust removal pipeline.

[0018] In one of the embodiments, the chromium oxide pneumatic conveying system further comprises a first pressure transmitter, the first pressure transmitter is arranged on the dense phase pump.

[0019] In one of the embodiments, the dust removal device further comprises a second pressure transmitter, the second pressure transmitter is arranged on the single-point dust collector.

[0020] In one of the embodiments, the chromium oxide pneumatic conveying system further comprises a high fork level meter and a low fork level meter, both of which are arranged on the dense phase pump, the high fork level meter is arranged adjacent to the feeding end of the dense phase pump, and the low fork level meter is arranged adjacent to the discharging end of the dense phase pump.

[0021] In one of the embodiments, the chromium oxide pneumatic conveying system further comprises a safety valve, which is arranged on the dense phase pump.

[0022] A chromium oxide pneumatic conveying process for implementing the chromium oxide pneumatic conveying system according to any one of the above embodiments.

[0023] The chromium oxide pneumatic conveying process comprises the following steps:

[0024] Fix the ton bag on the travelling crane, start the travelling crane to move the ton bag to directly above the glove box, and move the ton bag towards the glove box until the discharging end of the ton bag is located in the glove box;

[0025] Start the ton bag clamping device to clamp the ton bag;

[0026] Cut the discharging end of the ton bag through the glove box to discharge the chromium oxide particles in the ton bag into the dense phase pump;

[0027] Start the compressed gas input assembly to deliver compressed gas to perform a positive pressure dense phase conveying operation on the chromium oxide particles in the dense phase pump, so that the chromium oxide particles are conveyed into the feeding assembly through the conveying pipeline.

[0028] Compared with the prior art, the present disclosure has at least the following advantages:

[0029] 1. The ton bag fixed on the travelling crane is moved to directly above the glove box through the travelling crane, and then the ton bag is moved downward until the discharging end of the ton bag is clamped in the ton bag clamping device, at this time, the discharging end of the ton bag is also located in the glove box, the ton bag is clamped through the ton bag clamping device, which ensures that the ton bag and the glove box are in sealed connection, the user cuts the discharging end of the ton bag through the glove box, which avoids the situation of dust overflow during the ton bag discharging process, ensures the personal safety of the user, and the chromium oxide particles in the ton bag can be discharged into the dense phase pump.

[0030] 2、The compressed gas source inputs compressed gas into the dense-phase pump through the compressed gas input assembly, and the chromium oxide particles are input into the feeding assembly through the conveying pipeline under the pushing of the compressed gas. Since the compressed gas is continuously input, the chromium oxide pneumatic conveying system will not have the problems of accumulation or blockage of chromium oxide particles when conveying in different lengths of conveying pipelines, so as to meet the conveying demand of conveying pipelines of different lengths, ensure the smoothness of the conveying of chromium oxide particles, greatly improve the feeding rate of chromium oxide particles, and further improve the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0032] Figure 1 It is a structural schematic diagram of the chromium oxide pneumatic conveying system in an embodiment.

[0033] Figure 2 It is a structural schematic diagram of the chromium oxide pneumatic conveying system in an embodiment. Figure 1

[0034] Figure 3 It is a structural schematic diagram of the chromium oxide pneumatic conveying system in an embodiment. Figure 1

[0035] Figure 4 It is a structural schematic diagram of the chromium oxide pneumatic conveying system in an embodiment. Figure 1

[0036] Figure 5 It is a structural schematic diagram of the conveying elbow of the chromium oxide pneumatic conveying system in an embodiment. Figure 1

[0037] Figure 6 It is a structural schematic diagram of the conveying elbow of the chromium oxide pneumatic conveying system in an embodiment. Figure 5

[0038] Figure 7 It is a structural schematic diagram of the chromium oxide pneumatic conveying system in an embodiment. Figure 5

[0039] Figure 8 It is a structural schematic diagram of the chromium oxide pneumatic conveying system in an embodiment. Figure 7

[0040] Figure 9 It is a flowchart of the chromium oxide pneumatic conveying process in another embodiment.​​​​​​​ Detailed Implementation

[0041] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0042] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] This disclosure provides a chromium oxide pneumatic conveying system including a ton bag unpacking station. The ton bag unpacking station includes a frame, a gantry crane, a glove control box, and a ton bag clamping device. Both the gantry crane and the glove control box are mounted on the frame. The gantry crane is used to fix and move the ton bags. The ton bag clamping device is located at one end of the glove control box and is used to clamp the unloading end of the ton bag, keeping the unloading end inside the glove control box. The chromium oxide pneumatic conveying system also includes a dense phase pump, a conveying pipeline, a feeding assembly, and a compressed gas input assembly. The inlet end of the dense phase pump is connected to the other end of the glove control box. One end of the conveying pipeline is connected to the outlet end of the dense phase pump. The other end of the conveying pipeline is connected to the inlet end of the feeding assembly. The inlet end of the compressed gas input assembly is connected to a compressed gas source, and the outlet end of the compressed gas input assembly is connected to the inlet end of the dense phase pump.

[0045] Please see Figure 1 To better understand the chromium oxide pneumatic transport system 10 of this disclosure, the following further explanation of the chromium oxide pneumatic transport system 10 is provided:

[0046] The pneumatic conveying system 10 of the chromium oxide in one embodiment comprises a ton bag unpacking station 100, the ton bag unpacking station 100 comprises a frame 110, a travelling crane 120, a glove box 130 and a ton bag clamping device 140, the travelling crane 120 and the glove box 130 are both installed on the frame 110, the travelling crane 120 is used for fixing and moving the ton bag, the ton bag clamping device 140 is arranged on one end of the glove box 130, and the ton bag clamping device 140 is used for clamping the lower end of the ton bag and making the lower end of the ton bag located in the glove box 130. The pneumatic conveying system 10 further comprises a dense phase pump 200, a conveying pipeline 300, a feeding assembly 400 and a compressed gas input assembly 500. The feeding end of the dense phase pump 200 is communicated with the other end of the glove box 130. One end of the conveying pipeline 300 is communicated with the discharging end of the dense phase pump 200. The other end of the conveying pipeline 300 is communicated with the feeding end of the feeding assembly 400. The gas inlet end of the compressed gas input assembly 500 is communicated with a compressed gas source, and the gas outlet end of the compressed gas input assembly 500 is communicated with the gas inlet end of the dense phase pump 200.

[0047] In the embodiment, the ton bag fixed on the travelling crane 120 is moved to the directly above of the glove box 130 by the travelling crane 120, and then the ton bag is moved downward until the lower end of the ton bag is clamped in the ton bag clamping device 140, at this time, the lower end of the ton bag is also located in the glove box 130, the ton bag is clamped by the ton bag clamping device 140, and it is ensured that the ton bag and the glove box 130 are in sealed connection, the user cuts the lower end of the ton bag through the glove box 130, so as to avoid the dust overflow in the ton bag discharging process, ensure the personal safety of the user, and at the same time, the chromium oxide particles in the ton bag can be discharged into the dense phase pump 200.

[0048] Further, the compressed gas source inputs the compressed gas into the dense phase pump 200 through the compressed gas input assembly 500, and the chromium oxide particles are input into the feeding assembly 400 through the conveying pipeline 300 under the pushing of the compressed gas. Since the compressed gas is continuously input, the pneumatic conveying system of the chromium oxide will not appear the accumulation or blockage of the chromium oxide particles when conveying in the conveying pipeline 300 with different lengths, so as to meet the conveying demand of the conveying pipeline with different lengths, ensure the smoothness of the conveying of the chromium oxide particles, greatly improve the feeding rate of the chromium oxide particles, and further improve the production efficiency.

[0049] As shown in Figure 1 In one of the embodiments, the ton bag unpacking station 100 further comprises a plurality of beating devices 150, the plurality of beating devices 150 are arranged on the frame 110, and the beating end of each beating device 150 faces the ton bag. It can be understood that through the arrangement of the beating device 150, the feeding speed of the chromium oxide particles in the ton bag can be accelerated, so as to effectively improve the feeding efficiency of the chromium oxide particles.

[0050] AsFigure 1 and Figure 2 As shown, in one embodiment, the chromium oxide pneumatic transport system 10 further includes a first pneumatic switching valve 600, which is disposed on the transport pipeline 300. It is understood that the first pneumatic switching valve 600 controls the switching on and off of the dense phase pump 200, thereby controlling the transport of chromium oxide particles.

[0051] like Figure 1 As shown, in one embodiment, the feeding assembly 400 includes a feeding hopper 410 and a mixing hopper 420. The inlet end of the feeding hopper 410 is connected to the other end of the conveying pipe 300, and the outlet end of the feeding hopper 410 is connected to the inlet end of the mixing hopper 420. It can be understood that the feeding hopper 410 is the raw material hopper for the next process, and the mixing hopper 420 is the hopper where chromium oxide particles are mixed with other materials during application.

[0052] like Figure 1 and Figure 2 As shown, in one embodiment, the compressed gas input assembly 500 includes a compressed gas input main pipe 510, a plurality of compressed gas input branch pipes 520, a plurality of first electromagnetic switch valves 530, a plurality of first pressure reducing valves 540, and a plurality of second pneumatic switch valves 550. One end of the compressed gas input main pipe 510 is connected to a compressed gas source, and the other end of the compressed gas input main pipe 510 is connected to one end of each of the plurality of compressed gas input branch pipes 520. The other end of each compressed gas input branch pipe 520 is connected to the corresponding air inlet end of the dense phase pump 200. Each first electromagnetic switch valve 530, each first pressure reducing valve 540, and each second pneumatic switch valve 550 are sequentially arranged on the corresponding compressed gas input branch pipe 520 along the air inlet direction. Understandably, since the input air pressure of the compressed air source is relatively high, the first electromagnetic switch valve 530 controls the opening and closing of the corresponding compressed gas input branch pipe 520, the first pressure reducing valve 540 adjusts the air pressure value of each compressed gas input branch pipe 520, and finally the second pneumatic switch valve 550 is opened to input the pressure-regulated compressed gas into the dense phase pump 200 to ensure the air pressure stability in the dense phase pump 200.

[0053] It should be noted that there are several air inlets on the dense phase pump 200, which are arranged sequentially at intervals along the height of the dense phase pump 200. That is to say, through several compressed air input branches, it can be ensured that compressed gas is input from multiple areas of the dense phase pump 200, thereby increasing the input coverage area of ​​compressed gas, reducing the residual chromium oxide particles in the dense phase pump 200, and thus improving the feeding efficiency of chromium oxide particles.

[0054] like Figure 1As shown in the drawings, in one embodiment, the chromium oxide pneumatic conveying system 10 further comprises a dome valve 700, one end of the dome valve 700 is communicated with the other end of the glove box 130, and the other end of the dome valve 700 is communicated with the feeding end of the dense phase pump 200. It can be understood that by adjusting the opening degree of the dome valve 700, the feeding rate and amount of chromium oxide particles can be controlled, so as to prevent the chromium oxide particles in the dense phase pump 200 from being overfilled or idling, and to ensure the stability of the chromium oxide pneumatic conveying system 10.

[0055] As shown in the drawings, Figure 1 and Figure 4 As shown in the drawings, in one embodiment, the chromium oxide pneumatic conveying system 10 further comprises a dust removal device 800, the dust removal device 800 comprises a dust removal pipeline 810, a third pneumatic on-off valve 820, a single-point dust collector 830, a pulse backflushing device 840 and an exhaust pipeline 850, one end of the dust removal pipeline 810 is communicated with the dust discharge port of the dense phase pump 200, the third pneumatic on-off valve 820 and the single-point dust collector 830 are both arranged on the dust removal pipeline 810, one end of the pulse backflushing device 840 is communicated with the compressed air source, the other end of the pulse backflushing device 840 is communicated with the air inlet end of the single-point dust collector 830, and one end of the exhaust pipeline 850 is communicated with the other end of the dust removal pipeline 810. It can be understood that when the chromium oxide particles are fed into the dense phase pump 200, dust will be generated, at this time, the compressed air is continuously input, the chromium oxide particles deposited at the bottom of the dense phase pump 200 are conveyed to the conveying pipeline 300, and the compressed air also pushes the dusted chromium oxide particles into the dust discharge port and into the dust removal pipeline 810, the chromium oxide particles are filtered by the single-point dust collector 830, the clean gas is discharged through the exhaust pipeline 850, and the chromium oxide particles are prevented from overflowing into the workshop. Further, when the filter element in the single-point dust collector 830 is blocked, the compressed air is input through the pulse backflushing device 840 and the chromium oxide particles in the filter element are backflushed into the dense phase pump 200, so that the single-point dust collector 830 restores the filtering function, reduces the loss of chromium oxide particles, and further improves the feeding efficiency of chromium oxide.

[0056] As shown in the drawings, Figure 1 As shown in the drawings, in one embodiment, the chromium oxide pneumatic conveying system 10 further comprises a first pressure transmitter 900 arranged on the dense phase pump 200. It can be understood that the pressure in the dense phase pump 200 can be monitored in real time by the first pressure transmitter 900, and the pressure value of the compressed air can be adjusted according to the pressure in the dense phase pump 200, so as to avoid abnormal pressure and ensure the stability of the chromium oxide pneumatic conveying system 10 during conveying.

[0057] As shown in the drawings, Figure 4As shown, in one of the embodiments, the dust removal device 800 further comprises a second pressure transmitter 860, which is arranged on the single-point dust remover 830. It can be understood that the air pressure of the single-point dust remover 830 can be determined by the second pressure transmitter 860, and when the pressure difference is large, it indicates that the filter element is blocked, so that the pulse blowback device 840 can be blown back in time to ensure the normal use of the dust removal device 800.

[0058] As shown, in one of the embodiments, the compressed gas input assembly 500 further comprises a plurality of third pressure transmitters 560, each of which is arranged on the corresponding compressed gas input branch pipe 520 and located between the first pressure reducing valve 540 and the second pneumatic on-off valve 550. It can be understood that since the air pressure values input by each compressed gas input branch pipe 520 are different, that is, the air pressure values of the compressed gas required by each region of the dense phase pump 200 are different, the first pressure reducing valve 540 is adjusted by the pressure monitoring value of the third pressure transmitter 560 to adjust the air pressure value of each compressed gas input branch pipe 520, so as to realize accurate delivery of the air pressure value, thereby reducing the residual chromium oxide particles in the dense phase pump 200, greatly improving the feeding rate of the chromium oxide, and effectively improving the production efficiency. Figure 2 Figure 3 Further, since the compressed air contacts the chromium oxide particles in the dense phase pump 200, part of the air pressure is lost during the contact process, thereby reducing the transportation rate of the chromium oxide particles. In one of the embodiments, the compressed gas input assembly 500 further comprises a gas supplement regulator 570, a gas supplement input pipeline 580, a second electromagnetic on-off valve 590, a second pressure reducing valve 5100, and a fourth pneumatic on-off valve 5110. The gas supplement regulator 570 is arranged on the conveying pipeline 300, the other end of the compressed gas input main pipe 510 is communicated with one end of the gas supplement input pipeline 580, the other end of the gas supplement input pipeline 580 is communicated with the gas supplement regulator 570, and the second electromagnetic on-off valve 590, the second pressure reducing valve 5100, and the fourth pneumatic on-off valve 5110 are sequentially arranged on the corresponding gas supplement input pipeline 580 in the air inlet direction. It can be understood that the compressed air is input from the compressed gas input main pipe 510, and the pressure value is large, which needs to be reduced by the second pressure reducing valve 5100 before being input to the gas supplement regulator 570, so as to compensate for the lost air pressure, ensure that the chromium oxide particles always have a high transportation rate, further improve the feeding efficiency of the chromium oxide particles, and further improve the production efficiency. The second electromagnetic on-off valve 590 and the fourth pneumatic on-off valve 5110 need to ensure that the air pressure value of the supplemented compressed air is equal to the lost air pressure value, so as to ensure the transportation stability of the chromium oxide particles.

[0059] Further, since the compressed air contacts the chromium oxide particles in the dense phase pump 200, part of the air pressure is lost during the contact process, thereby reducing the transportation rate of the chromium oxide particles. In one of the embodiments, the compressed gas input assembly 500 further comprises a gas supplement regulator 570, a gas supplement input pipeline 580, a second electromagnetic on-off valve 590, a second pressure reducing valve 5100, and a fourth pneumatic on-off valve 5110. The gas supplement regulator 570 is arranged on the conveying pipeline 300, the other end of the compressed gas input main pipe 510 is communicated with one end of the gas supplement input pipeline 580, the other end of the gas supplement input pipeline 580 is communicated with the gas supplement regulator 570, and the second electromagnetic on-off valve 590, the second pressure reducing valve 5100, and the fourth pneumatic on-off valve 5110 are sequentially arranged on the corresponding gas supplement input pipeline 580 in the air inlet direction. It can be understood that the compressed air is input from the compressed gas input main pipe 510, and the pressure value is large, which needs to be reduced by the second pressure reducing valve 5100 before being input to the gas supplement regulator 570, so as to compensate for the lost air pressure, ensure that the chromium oxide particles always have a high transportation rate, further improve the feeding efficiency of the chromium oxide particles, and further improve the production efficiency. The second electromagnetic on-off valve 590 and the fourth pneumatic on-off valve 5110 need to ensure that the air pressure value of the supplemented compressed air is equal to the lost air pressure value, so as to ensure the transportation stability of the chromium oxide particles.

[0060] ​Further, in one embodiment, the compressed gas input assembly 500 further comprises a fourth pressure transmitter 5120, which is arranged on the make-up gas input pipe 580 and located between the second pressure reducing valve 5100 and the fourth pneumatic on-off valve 5110. It can be understood that the second pressure reducing valve 5100 is adjusted according to the pressure monitoring value of the fourth pressure transmitter 5120 to adjust the pressure value of the make-up compressed air, so as to ensure the transportation stability of the chromium oxide particles.

[0061] Further, the chromium oxide particles will lose pressure when contacting the conveying pipe 300 during transportation, thereby reducing the transportation rate of the chromium oxide particles. In one embodiment, the chromium oxide pneumatic transportation system 10 further comprises a positive pressure make-up device 1300, which comprises a positive pressure make-up input main pipe 1310, a third electromagnetic on-off valve 1320, a third pressure reducing valve 1330, a plurality of positive pressure make-up input branch pipes 1340 and a plurality of fifth pneumatic on-off valves 1350. One end of the positive pressure make-up input main pipe 1310 is in communication with the compressed air source, and the other end of the positive pressure make-up input main pipe 1310 is in communication with one end of each of the plurality of positive pressure make-up input branch pipes 1340. The third electromagnetic on-off valve 1320 and the third pressure reducing valve 1330 are sequentially arranged on the positive pressure make-up input main pipe 1310 in the gas inlet direction. The other end of each of the positive pressure make-up input branch pipes 1340 is in communication with the conveying pipe 300, and each of the fifth pneumatic on-off valves 1350 is arranged on the corresponding positive pressure make-up input branch pipe 1340. It can be understood that the compressed air is input into the positive pressure make-up input main pipe 1310, the pressure value of the compressed air is adjusted by the third pressure reducing valve 1330, and the compressed air is branched to each of the positive pressure make-up input branch pipes 1340. The third electromagnetic on-off valve 1320 controls the input switch of the compressed air, and the fifth pneumatic on-off valve 1350 controls the input switch of the compressed air of each of the positive pressure make-up input branch pipes 1340. In this way, the transportation stability of the chromium oxide particles in the conveying pipe 300 and the uniform transportation rate can be ensured, thereby improving the feeding efficiency of the chromium oxide particles and the production efficiency.

[0062] Further, the positive pressure make-up device 1300 further comprises a fifth pressure transmitter 1360, which is arranged on the positive pressure make-up input main pipe 1310. It can be understood that the opening degree of the third pressure reducing valve 1330 is adjusted according to the pressure value monitored by the fifth pressure transmitter 1360 to adjust the pressure value of the positive pressure make-up, so as to ensure the transportation stability of the chromium oxide particles.

[0063] Furthermore, the positive pressure air supply device 1300 also includes several one-way valves 1370, each of which is installed on a corresponding positive pressure air supply input branch pipe 1340. It can be understood that by installing the one-way valves 1370, the backflow of compressed air can be prevented.

[0064] like Figure 1 As shown, in one embodiment, the chromium oxide pneumatic conveying system 10 further includes a high-level tuning fork level gauge 1000 and a low-level tuning fork level gauge 1100. Both the high-level tuning fork level gauge 1000 and the low-level tuning fork level gauge 1100 are installed on the dense phase pump 200. The high-level tuning fork level gauge 1000 is located near the inlet end of the dense phase pump 200, and the low-level tuning fork level gauge 1100 is located near the outlet end of the dense phase pump 200. It can be understood that both the high-level tuning fork level gauge 1000 and the low-level tuning fork level gauge 1100 are used to monitor the filling level of the material in the dense phase pump 200, preventing the material in the dense phase pump 200 from being overfilled or running dry, and ensuring that the material in the dense phase pump 200 is in a relatively stable level state. Specifically, when the material in the dense phase pump 200 is at a low level, the low-level tuning fork level gauge 1100 automatically triggers a feeding signal. The dome valve 700 receives and executes the feeding signal, increasing the opening of the dome valve 700 to increase the feeding amount of chromium oxide particles. When the material in the dense phase pump 200 is at a high level, the high-level tuning fork level gauge 1000 automatically triggers a stop signal. The dome valve 700 receives and executes the stop signal, closing the dome valve 700 to cut off the feeding of chromium oxide particles and prevent the chromium oxide particles from overflowing due to overfilling.

[0065] like Figure 1 As shown, in one embodiment, the chromium oxide pneumatic transport system 10 further includes a safety valve 1200, which is mounted on the dense phase pump 200. It is understood that when the first pressure transmitter 900 detects an abnormal increase in pressure in the dense phase pump 200 that reaches a set threshold of the safety valve 1200, the first pressure transmitter 900 sends an opening signal. The safety valve 1200 receives and executes the opening signal, automatically opening to release the pressure in the dense phase pump 200, ensuring safety during the chromium oxide transport process.

[0066] It should be noted that the chromium oxide pneumatic transportation system 10 further comprises a control device in communication connection with the row crane 120, the ton bag clamping device 140, the plurality of beating devices 150, the first pneumatic on-off valve 600, the plurality of first electromagnetic on-off valves 530, the plurality of first pressure reducing valves 540, the plurality of second pneumatic on-off valves 550, the dome valve 700, the third pneumatic on-off valve 820, the single-point dust collector 830, the pulse backflushing device 840, the first pressure transmitter 900, the second pressure transmitter 860, the plurality of third pressure transmitters 560, the air supplement regulator 570, the second electromagnetic on-off valve 590, the second pressure reducing valve 5100, the fourth pneumatic on-off valve 5110, the fourth pressure transmitter 5120, the third electromagnetic on-off valve 1320, the third pressure reducing valve 1330, the fifth pressure transmitter 1360, the plurality of fifth pneumatic on-off valves 1350, the high-level tuning fork level meter 1000, the low-level tuning fork level meter 1100, and the safety valve 1200, so as to realize the automatic transportation of the chromium oxide pneumatic transportation system 10 through the control device, thereby effectively improving the feeding efficiency of the chromium oxide particles.

[0067] It can be understood that, since chromium oxide can be used as a raw material for manufacturing lithium battery positive electrode materials, the purity of the material is required to be high, and chromium oxide is batch delivered in the whole pneumatic transportation process. The compressed gas delivered by positive pressure pushes the chromium oxide to be transported on the delivery pipeline 300, and the chromium oxide pneumatic transportation system 10 of the present disclosure always keeps the chromium oxide at a high speed and stable transportation. However, the hardness of the chromium oxide is relatively high, and the chromium oxide particles are easily impacted at the elbow of the delivery pipeline 300 in the high-speed delivery process, that is, the chromium oxide particles collide and wear with the impacted surface at the elbow, and the material at the elbow is generally stainless steel. In the collision process, stainless steel impurity particles are introduced, thereby affecting the purity of the chromium oxide particles. Please refer to Figure 3 Figures 5 to 8 In one embodiment, the delivery pipeline 300 comprises at least three delivery straight pipe pieces 310 and at least two delivery elbow pieces 320. In this embodiment, the three delivery straight pipe pieces 310 are a first delivery straight pipe piece 310a, a second delivery straight pipe piece 310b, and a third delivery straight pipe piece 310c, and the two delivery elbow pieces 320 are a first delivery elbow piece 320a and a second delivery elbow piece 320b. One end of the first delivery straight pipe piece 310a is in communication with the discharge end of the dense phase pump 200, the other end of the first delivery straight pipe piece 310a is detachably communicated with one end of the first delivery elbow piece 320a, one end of the second delivery straight pipe piece 310b is detachably communicated with the other end of the first delivery elbow piece 320a, the other end of the second delivery straight pipe piece 310b is detachably communicated with one end of the second delivery elbow piece 320b, one end of the third delivery straight pipe piece 310c is detachably communicated with the other end of the second delivery elbow piece 320b, and the other end of the third delivery straight pipe piece 310c is in communication with the feeding end of the feeding bin 410.​

[0068] Further, each conveying elbow piece 320 comprises an elbow body 3210, an arc-shaped cover plate 3220 and a chromium oxide deposition layer 3230, the elbow body 3210 is detachably connected with the arc-shaped cover plate 3220, two ends of the elbow body 3210 are respectively communicated with the corresponding conveying straight pipe pieces 310, the arc-shaped cover plate 3220 is formed with a deposition groove 3221, and the chromium oxide deposition layer 3230 is arranged in the deposition groove 3221. By detachably connecting the conveying elbow piece 320 with the two corresponding conveying straight pipe pieces 310, the conveying elbow piece 320 can be detached, and the conveying elbow piece 320 comprises the elbow body 3210, the arc-shaped cover plate 3220 and the chromium oxide deposition layer 3230, wherein the arc-shaped cover plate 3220 is the impacted surface, the deposition groove 3221 is formed on the arc-shaped cover plate 3220, and the chromium oxide deposition layer 3230 is arranged in the deposition groove 3221, that is, the chromium oxide particles collide and wear with the chromium oxide deposition layer 3230 when passing through the conveying elbow piece 320, and the chromium oxide deposition layer 3230 itself has good wear resistance, so that even if there is wear, it is only the chromium oxide particles that fall off, so that the chromium oxide particles cannot introduce new impurities in the process of maintaining high speed and stable transportation, thereby ensuring the purity of the chromium oxide particles. At the same time, after the chromium oxide deposition layer 3230 is worn out, the conveying elbow piece 320 can be detached, the arc-shaped cover plate 3220 is detached and the chromium oxide deposition layer 3230 is plated in the deposition groove 3221 by vapor deposition, so that the conveying elbow piece can be recycled and the service life is prolonged, and the use cost of the chromium oxide pneumatic conveying system is saved.

[0069] It should be noted that the conveying straight pipe piece 310 and the conveying elbow piece 320 are detachably connected by locking screws, and the arc-shaped cover plate 3220 and the elbow body 3210 are detachably connected by locking screws.

[0070] Further, since the chromium oxide particles always maintain high speed and stable transportation, the impact force on the chromium oxide deposition layer is very large in the transportation process, and the wear resistance of the chromium oxide deposition layer is very high, so it is necessary to form a dense chromium oxide deposition layer to reduce the number of times of detaching the conveying elbow piece, so as to further improve the feeding efficiency of the chromium oxide. In one embodiment, the specific operation steps of plating the arc-shaped cover plate with the chromium oxide deposition layer are as follows:

[0071] The arc-shaped cover plate is subjected to surface cleaning treatment;

[0072] The arc-shaped cover plate subjected to the surface cleaning treatment is subjected to drying treatment;

[0073] The arc-shaped cover plate is placed in a vacuum chamber for vacuumizing treatment;

[0074] The vacuum chamber is connected with appropriate argon, and the high-energy ion impact of the chromium oxide target is started by the magnetron sputtering source device, so that the atoms on the surface of the chromium oxide target are sputtered and deposited in the deposition groove of the arc cover plate.

[0075] The arc cover plate is cooled to solidify the chromium oxide deposition layer on the arc cover plate.

[0076] It should be noted that the arc cover plate is made of stainless steel, and the arc cover plate is soaked in an alkaline cleaning agent for ultrasonic cleaning, which can effectively remove the surface oil and impurities of the arc cover plate, while reducing the corrosion of the arc cover plate and ensuring the structural strength of the arc cover plate. Then the arc cover plate after ultrasonic cleaning is washed with water to remove the alkaline cleaning agent remaining on the arc cover plate, ensuring the cleanliness of the surface of the arc cover plate. The arc cover plate is dried to ensure that the arc cover plate remains dry before plating. The arc cover plate is placed in the sputtering area in the vacuum chamber, and the vacuum chamber is evacuated by a vacuum pump to a vacuum degree of 10 -6 Pa~10 -8 Pa, which can reduce the interference of gas molecules and ensure better sputtering effect. Further, the vacuum chamber is connected with appropriate argon, and the magnetron sputtering source device includes a cathode target column and a substrate, which have been placed in the vacuum chamber in advance, and the chamber wall of the vacuum chamber can act as an anode. After being electrified, an electromagnetic field is formed, and the argon gas is ionized near the cathode of the electromagnetic field and forms high-energy argon ions. The high-energy argon ions will accelerate to impact the cathode target column, so that the atoms on the surface of the chromium oxide target are impacted and sputtered in the sputtering area, i.e. in the deposition groove of the arc cover plate. The sputtering time, i.e. the electrification time, is adjusted according to the required thickness of the chromium oxide deposition layer. Finally, the arc cover plate is cooled to solidify the chromium oxide deposition layer on the arc cover plate. In this way, a dense chromium oxide deposition layer can be quickly formed on the arc cover plate, improving the wear resistance of the chromium oxide deposition layer of the arc cover plate, thereby reducing the disassembly frequency of the conveying elbow, and effectively improving the feeding efficiency of the chromium oxide particles.

[0077] Further, the flow rate of argon is 5mL / min~10mL / min, the sputtering frequency of the magnetron sputtering source device is 400w~500w, and the sputtering time is 1min~3min. It should be noted that under this sputtering condition, the chromium oxide can be quickly sputtered in the deposition groove, and a dense chromium oxide deposition layer can be formed after cooling. Further, the formed chromium oxide deposition layer is arc-shaped, so that the arc cover plate can be fitted with the inner wall of the elbow body when it is loaded into the elbow body, i.e. the flatness of the chromium oxide deposition layer is consistent with that of the arc cover plate, so that the flatness of the inner wall of the conveying pipeline is good, reducing the resistance of the chromium oxide particles during conveying, thereby reducing the resistance during conveying, and effectively improving the feeding efficiency of the chromium oxide particles.

[0078] Referring to Figure 9 The present disclosure also provides a chromium oxide pneumatic transportation process for implementing the chromium oxide pneumatic transportation system of any of the above embodiments.

[0079] The chromium oxide pneumatic transportation process comprises the following steps:

[0080] S100, fixing a ton bag on a travelling crane, starting the travelling crane to move the ton bag to directly above a glove box, and moving the ton bag towards the glove box until a discharging end of the ton bag is located in the glove box.

[0081] In this embodiment, the ton bag is fixed on the travelling crane by manual operation, the travelling crane is driven to move the ton bag in a horizontal direction to directly above the glove box, and then the travelling crane is driven to move the ton bag in a vertical direction towards the glove box until the discharging end of the ton bag is located in the glove box. At this time, the discharging end of the ton bag passes through the ton bag clamping device and the ton bag abuts against the ton bag clamping device, i.e. the ton bag cannot continue to move downward.

[0082] It should be noted that the specific operation steps of S100 are as follows: setting a lateral movement preset value of the travelling crane and forming an execution parameter of a movement signal; when the ton bag is fixed on the travelling crane, sending a movement signal by a control device, the travelling crane receiving and executing the movement signal according to the lateral movement preset value to drive the ton bag to move in a horizontal direction to directly above the glove box; sending a descending signal by the control device, the travelling crane receiving and executing the descending signal to drive the ton bag to move in a vertical direction towards the glove box; when the travelling crane cannot continue to descend, the travelling crane automatically triggers and executes a stop signal to complete the conveying process of the ton bag, realizes precise bagging of the ton bag, and thus effectively improves the automation degree of the chromium oxide pneumatic transportation system.

[0083] S200, starting the ton bag clamping device to clamp the ton bag.

[0084] In this embodiment, the ton bag is clamped and fixed by starting the ton bag clamping device to avoid dust, ensure the sealing of the ton bag during discharging, and thus ensure that there is no dust pollution in the workshop and improve the safety of the workshop. Specifically, after the travelling crane automatically triggers and executes the stop signal, the control device sends a clamping signal, the ton bag clamping device receives and executes the clamping signal to clamp the ton bag, and thus ensures the sealing during discharging.

[0085] S300, cutting the discharging end of the ton bag by the glove box to make the chromium oxide particles in the ton bag discharged into the dense phase pump.

[0086] In the embodiment, the artificial hand is inserted into the glove operation box, and the artificial cuts the ton bag through the glove. On the one hand, the ton bag can be discharged, and on the other hand, the safety of the artificial can be ensured. Meanwhile, after the cutting operation is completed, the control device sends a beating signal, the beating device receives and executes the beating signal to beat the ton bag, so as to accelerate the feeding rate of the chromium oxide particles in the ton bag, and reduce the residual chromium oxide particles in the ton bag.

[0087] Further, after the cutting operation is completed, the control device sends a feeding signal, the dome valve receives and executes the feeding signal, adjusts the opening degree of the dome valve, so that the chromium oxide particles in the ton bag can pass through the dome valve into the dense phase valve.

[0088] S400, the compressed gas input assembly is started to deliver compressed gas to the dense phase pump to perform a positive pressure dense phase conveying operation on the chromium oxide particles in the dense phase pump, so that the chromium oxide particles are conveyed to the feeding assembly through the conveying pipeline.

[0089] In the embodiment, the compressed gas input assembly is started to deliver compressed gas from the compressed gas source to the dense phase pump, so that the chromium oxide particles in the dense phase pump are pushed by the compressed gas to move towards the discharge end and are conveyed to the feeding assembly through the conveying pipeline, so as to realize efficient conveying of the chromium oxide particles, and avoid accumulation or blockage of the chromium oxide particles in the conveying pipeline.

[0090] It should be noted that the compressed gas is inert gas, such as nitrogen, helium or argon.

[0091] Further, the specific operation steps of S400 are: setting a pressure preset value of each third pressure transmitter; the control device inputs an opening valve signal, and the plurality of first electromagnetic on-off valves receive and execute the opening valve signal, so that the compressed gas source flows through the compressed gas input main pipe to the plurality of compressed gas input branch pipes; each first pressure reducing valve adjusts its opening degree according to the pressure value fed back by the corresponding third pressure transmitter; when the actual pressure value of the third pressure transmitter is equal to the pressure preset value, the third pressure transmitter automatically triggers an air inlet signal, the second pneumatic on-off valve receives and executes the air inlet signal, and the second pneumatic on-off valve is opened, so that the compressed gas is input into the dense phase pump through the compressed gas input branch pipe; the first pneumatic on-off valve receives and executes the air inlet signal, so that the chromium oxide particles are conveyed to the feeding bin through the conveying pipeline, so as to realize accurate input of the compressed air. Since the air pressure values required by each region of the dense phase pump are different, the input pressure value of the compressed gas is accurately controlled, so that the chromium oxide particles can be efficiently and stably conveyed to the target region, and the feeding efficiency of the chromium oxide particles and the stability during the conveying process are improved.

[0092] Further, the delivery pressure value of the chromium oxide particles is 0.6-0.8 MPa. It can be understood that the pressure value fed back by the first pressure transmitter is the delivery pressure value of the chromium oxide particles.

[0093] Further, since the compressed gas contacts the chromium oxide particles after being input into the dense-phase pump, and the chromium oxide particles themselves have gravity, the resistance needs to be overcome during pushing, which results in loss of the pressure value of the compressed gas. In order to ensure high-speed and stable delivery of the chromium oxide particles, in one embodiment, a delivery preset pressure value of the chromium oxide particles is set; when the delivery actual pressure value fed back by the first pressure transmitter is lower than the delivery preset pressure value, a pressure difference value between the delivery actual pressure value and the delivery preset pressure value is calculated; the control device sends an opening valve signal, the second electromagnetic on-off valve receives and executes the opening valve signal, the compressed air is input into the air supplement input pipeline, the opening degree of the second pressure reducing valve is automatically adjusted according to the pressure value fed back by the fourth pressure transmitter, until the pressure value fed back by the fourth pressure transmitter is equal to the pressure difference value between the delivery actual pressure value and the delivery preset pressure value, the fourth pressure transmitter triggers the opening valve signal, the third pneumatic valve receives and executes the opening valve signal, and the compressed gas is input into the delivery pipeline through the air supplement regulator, so as to supplement the compressed air in the delivery pipeline and ensure high-speed and stable delivery of the chromium oxide particles.

[0094] It should be noted that the air pressure value of the air supplement is the pressure difference value between the delivery actual pressure value and the delivery preset pressure value.

[0095] Further, since the chromium oxide particles contact the delivery pipeline during transportation in the delivery pipeline and lose air pressure, the transportation rate of the chromium oxide particles is reduced. In order to ensure high-speed and stable transportation of the chromium oxide particles in the delivery pipeline, in one embodiment, an air pressure preset value of the positive pressure air supplement is set; the control device sends an opening valve signal, the third electromagnetic on-off valve receives and executes, the compressed air source inputs the compressed gas into the positive pressure air supplement input main pipe; the third pressure reducing valve adjusts the opening degree thereof according to the pressure value fed back by the fourth pressure transmitter; when the pressure value fed back by the fourth pressure transmitter is equal to the air pressure preset value of the positive pressure air supplement, the fourth pressure transmitter triggers the opening valve signal, and the corresponding fourth pneumatic on-off valve receives and executes the opening valve signal, so that the compressed gas is delivered to the corresponding position of the delivery pipeline, and the air pressure value lost in the corresponding position area is supplemented. In this way, the air pressure stability of the chromium oxide particles during delivery in the delivery pipeline can be ensured, the delivery stability of the chromium oxide particles is ensured, the high-speed and stable delivery of the chromium oxide particles is ensured, and the feeding efficiency of the chromium oxide particles is effectively improved.

[0096] Further, the air pressure preset value of the positive pressure air supplement is 0.05-0.2 MPa.

[0097] In one of the embodiments, before the operation step of S100, the pneumatic conveying process of the chromium oxide further comprises the following steps:

[0098] The compressed gas is delivered by the compressed input assembly to clean the dense phase pump and the conveying pipeline.

[0099] It should be noted that the dense phase pump and the conveying pipeline are cleaned by the compressed gas to ensure that there is no water residue in the dense phase pump and the conveying pipeline, ensure the dryness of the chromium oxide particles during the conveying process, avoid the formation of sticky group of chromium oxide particles due to the presence of water, thereby avoiding the accumulation or blockage of the conveying pipeline, at the same time, the chromium oxide particles remaining in the dense phase pump and the conveying pipeline during the last conveying process can be discharged into the feeding assembly, reducing the loss of chromium oxide particles and improving the feeding efficiency of chromium oxide particles.

[0100] Further, the specific operation steps of cleaning the dense phase pump and the conveying pipeline by the compressed gas delivered by the compressed input assembly are as follows:

[0101] The valve opening signal is sent by the control device, and the valve opening signal is received and executed by the plurality of first electromagnetic on-off valves and the plurality of second pneumatic on-off valves, so that the compressed gas is input into the dense phase pump and the conveying pipeline through the compressed gas input main pipe and the plurality of compressed gas input branch pipes to perform the airway cleaning operation on the dense phase pump and the conveying pipeline.

[0102] It should be noted that while the dense phase pump and the conveying pipeline are being cleaned by the airway, the first pressure transmitter monitors the pressure value in real time, and when the pressure value is too high, the first pressure transmitter sends a valve closing signal, and the valve closing signal is received and executed by the plurality of first electromagnetic on-off valves and the plurality of second pneumatic on-off valves, so as to ensure the safety of the airway cleaning process.

[0103] Compared with the prior art, the present disclosure has at least the following advantages:

[0104] 1. The ton bag fixed on the travelling crane is moved to directly above the glove operation box by the travelling crane, and then the ton bag is moved downward until the discharge end of the ton bag is clamped in the ton bag clamping device, at which time the discharge end of the ton bag is also located in the glove operation box. The ton bag is clamped by the ton bag clamping device to ensure that the ton bag and the glove operation box are in sealed connection. The user cuts the discharge end of the ton bag through the glove operation box, thereby avoiding the powder dust overflow during the ton bag discharging process and ensuring the personal safety of the user, and at the same time, the chromium oxide particles in the ton bag can be discharged into the dense phase pump.

[0105] 2. Compressed gas is input into the dense phase pump through the compressed gas input component. Under the push of the compressed gas, chromium oxide particles are fed into the feeding component through the conveying pipeline. Since the compressed gas is continuously input, the chromium oxide pneumatic conveying system will not experience accumulation or blockage of chromium oxide particles when conveying through pipelines of different lengths. This ensures the smooth conveying of chromium oxide particles and greatly improves the feeding rate of chromium oxide particles, thereby increasing production efficiency.

[0106] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A chromium oxide pneumatic conveying system, comprising a ton bag unpacking station, the ton bag unpacking station comprising a frame, a gantry crane, a glove control box, and a ton bag clamping device, wherein the gantry crane and the glove control box are both mounted on the frame, the gantry crane is used to fix the ton bag and move the ton bag, the ton bag clamping device is disposed at one end of the glove control box, the ton bag clamping device is used to clamp the unloading end of the ton bag and position the unloading end of the ton bag within the glove control box, characterized in that, Also includes: A dense phase pump, wherein the feed end of the dense phase pump is connected to the other end of the glove control box; A conveying pipeline, one end of which is connected to the discharge end of the dense phase pump; A feeding assembly, wherein the other end of the conveying pipe is connected to the feed end of the feeding assembly; A compressed gas input assembly, wherein the inlet end of the compressed gas input assembly is connected to a compressed gas source, and the outlet end of the compressed gas input assembly is connected to the inlet end of the dense phase pump. The compressed gas input assembly includes a compressed gas input main pipe, several compressed gas input branch pipes, several first electromagnetic switch valves, several first pressure reducing valves, and several second pneumatic switch valves. One end of the compressed gas input main pipe is connected to the compressed gas source, and the other end of the compressed gas input main pipe is connected to one end of each of the several compressed gas input branch pipes. The other end of each compressed gas input branch pipe is connected to the corresponding air inlet end of the dense phase pump. Each first electromagnetic switch valve, each first pressure reducing valve, and each second pneumatic switch valve are sequentially arranged on the corresponding compressed gas input branch pipe along the air inlet direction. The chromium oxide pneumatic conveying system also includes a dome valve, one end of which is connected to the other end of the glove control box, and the other end of which is connected to the feed end of the dense phase pump. The chromium oxide pneumatic transport system also includes a dust removal device, which includes a dust removal pipeline, a third pneumatic switch valve, a single-point dust collector, a pulse backflushing device, and an exhaust pipeline. One end of the dust removal pipeline is connected to the dust discharge port of the dense phase pump. The third pneumatic switch valve and the single-point dust collector are both installed on the dust removal pipeline. One end of the pulse backflushing device is connected to the compressed air source, and the other end of the pulse backflushing device is connected to the air inlet of the single-point dust collector. One end of the exhaust pipeline is connected to the other end of the dust removal pipeline.

2. The chromium oxide pneumatic transport system according to claim 1, characterized in that, It also includes a first pneumatic switching valve, which is disposed on the delivery pipeline.

3. The chromium oxide pneumatic transport system according to claim 1, characterized in that, The feeding assembly includes a feeding hopper and a mixing hopper. The inlet end of the feeding hopper is connected to the other end of the conveying pipeline, and the outlet end of the feeding hopper is connected to the inlet end of the mixing hopper.

4. The chromium oxide pneumatic transport system according to claim 1, characterized in that, It also includes a first pressure transmitter, which is disposed on the dense phase pump; and / or, The dust removal device also includes a second pressure transmitter, which is installed on the single-point dust collector.

5. The chromium oxide pneumatic transport system according to claim 1, characterized in that, It also includes a high-level tuning fork level gauge and a low-level tuning fork level gauge, both of which are installed on the dense phase pump. The high-level tuning fork level gauge is located near the feed end of the dense phase pump, and the low-level tuning fork level gauge is located near the discharge end of the dense phase pump.

6. The chromium oxide pneumatic transport system according to claim 1, characterized in that, It also includes a safety valve, which is installed on the dense phase pump.

7. A pneumatic transport process for chromium oxide, characterized in that, For use in executing the chromium oxide pneumatic transport system according to any one of claims 1-6; The chromium oxide pneumatic transport process includes the following steps: Secure the ton bag to the overhead crane, start the overhead crane to move the ton bag directly above the glove control box, and move the ton bag toward the glove control box until the unloading end of the ton bag is inside the glove control box; The ton bag clamping device is activated to clamp the ton bag. The ton bag is cut at the discharge end using the glove control box, so that the chromium oxide particles inside the ton bag are discharged into the dense phase pump. The compressed gas input component is activated to deliver compressed gas to perform positive pressure dense phase conveying operation on the chromium oxide particles in the dense phase pump, so that the chromium oxide particles are conveyed to the feeding component through the conveying pipeline.

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