CN115722309A

CN115722309A - Crushing apparatus with inert gas protection

Info

Publication number: CN115722309A
Application number: CN202211482504.2A
Authority: CN
Inventors: 杜金林; 胡兆敏; 谭光剑; 李明; 杜孟林
Original assignee: Sichuan Zkbtnm Science And Technology Co ltd
Current assignee: Sichuan Zkbtnm Science And Technology Co ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-03-03

Abstract

The invention relates to the field of crushing devices, and particularly discloses crushing equipment with inert gas protection. Wherein, the inert gas supply device is connected with the air inlet of the crushing device. The feeding device is connected with the feeding hole of the crushing device. The grading wheel device is arranged at a discharge port at the top of the crushing device. The discharging and collecting device is connected with the grading wheel device. The invention is completely isolated from the outside through the closed space and the inert gas in the crushing process, avoids impurities and moisture in the air from being introduced into the material, fully ensures the purity of the material, and can be also suitable for the field of high-demand biological pharmacy and the industry of high-purity materials.

Description

Crushing apparatus with inert gas protection

Technical Field

The invention relates to the field of crushing devices, in particular to crushing equipment with inert gas protection.

Background

At present, crushing equipment cannot be used for raw material production in the powder metallurgy industry, the chemical industry, the pharmaceutical industry and the like, and combustible and explosive raw materials, easily-oxidized raw materials and the like need to be isolated from oxygen, moisture and the like during crushing, so that the crushing equipment selected according to the traditional thought is difficult to really meet the production quality requirement. Although the crushing production process is only one process in the whole raw material production process, the quality assurance of the raw material crushing production runs through the whole production process, and particularly, the raw materials are scrapped when flammable and explosive raw materials and easily oxidized raw materials are not well protected during crushing. However, the conventional pulverizing apparatus has difficulty in solving the following problems: the control of flammability and explosiveness, the control of oxidability and the control of air moisture.

Disclosure of Invention

In view of this, the present invention provides a pulverizing apparatus with inert gas protection, which aims to solve the problem that the pulverizing apparatus cannot completely isolate oxygen.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a crushing device with inert gas protection comprises a crushing device, an inert gas supply device, a feeding device, a grading wheel device and a discharged material collecting device. Wherein, the inert gas supply device is connected with the air inlet of the crushing device. The feeding device is connected with the feeding hole of the crushing device. The grading wheel device is arranged at a discharge port at the top of the crushing device. The discharging and collecting device is connected with the grading wheel device.

In some alternative embodiments, the crushing device comprises a classifying cylinder, a crusher main shaft, a hammer head fixing disc and a crusher hammer head. The inner area of the grading cylinder is sequentially divided into a grading cavity, a crushing cavity and a crusher lower chamber from top to bottom. The main shaft of the crusher is arranged at the axes of the crushing cavity and the lower chamber of the crusher. The hammer head fixing disc is fixedly installed on the crusher main shaft, the crusher hammer head is fixedly installed on the hammer head fixing disc, and the hammer head fixing disc and the crusher hammer head are both located in the crushing cavity. And a partition plate is arranged between the crushing cavity and the lower chamber of the crusher, and a vent hole is formed in the partition plate. The air inlet is arranged in the lower chamber of the pulverizer. The feed inlet is positioned at the bottom of the grading cavity. The discharge hole is positioned at the top of the grading cavity.

In some alternative embodiments, the feeding device comprises a feeder and a hopper. Wherein, the batcher with reducing mechanism's feed inlet is connected. The hopper is connected with the feeding machine.

In some alternative embodiments, the feed device further comprises a first feed control valve and a second feed control valve. The first feeding control valve and the second feeding control valve are sequentially arranged between the hopper and the feeder.

In some alternative embodiments, the inert gas supply device includes a nitrogen generator, a nitrogen gas storage tank, and a gas delivery pipe. Wherein, the nitrogen gas storage tank is connected with the nitrogen generator. One end of the gas conveying pipe is connected with the nitrogen gas storage tank, and the other end of the gas conveying pipe is connected with the air inlet of the crushing device.

In some alternative embodiments, the inert gas supply further comprises an air compressor, a particulate filter, a moisture filtering device, and an air reservoir. Wherein the particulate filter is connected with the air compressor. A moisture filtering device is connected to the particulate filter. The air storage tank is connected with the moisture filtering device. The air storage tank is also connected with the nitrogen making machine.

In some alternative embodiments, the output collection device comprises a collector, an output control valve, a pneumatic rapping and an emptying valve. The collector is connected with the grading wheel device, and a finished product discharge hole is formed in the bottom of the collector. The discharge control valve is arranged at the finished product discharge port. The pneumatic rapping is arranged on the collector. An evacuation valve is located at the top of the collector.

In some alternative embodiments, the comminution apparatus further comprises a gas circulation device. And the air inlet of the gas circulating device is connected with the air outlet at the top of the discharge collecting device, and the air outlet of the gas circulating device is connected with the air return inlet of the crushing device. The air return opening is arranged in the lower chamber of the pulverizer.

In some alternative embodiments, the gas circulation device comprises a cartridge filter, an induced draft fan, and a return air duct. Wherein, the cartridge filter is connected with an air outlet at the top of the discharge collecting device. The induced draft fan is connected with the security filter. One end of the air return pipeline is connected with the draught fan, and the other end of the air return pipeline is connected with an air return opening of the crushing device.

In some alternative embodiments, two return air inlets are provided and are oppositely arranged in the lower chamber of the pulverizer. The air return pipeline is connected with the two air return inlets at the same time.

In summary, compared with the prior art, the invention has the following advantages and beneficial effects:

1. the material can be crushed into the superfine powder or classified in a closed environment, and the material is crushed by adding an explosion release sheet and an explosion release valve on a dust removing device.

2. The crushing process is completely isolated from the outside through the closed space and the inert gas, so that impurities and moisture in the air are prevented from being introduced into the material, the purity of the material is fully guaranteed, and the crushing process can be suitable for the field of high-demand biopharmaceuticals and the industry of high-purity materials.

3. Full automation one-key type starts, environmental protection, high efficiency, and easy operation is intelligent.

4. The material is driven by the hammer head turntable to rotate at a high speed, collide and shear, and the material crushing efficiency is higher than that of the jet mill.

Drawings

FIG. 1 is a schematic view of the present invention without an inert gas supply device.

FIG. 2 is a schematic view showing the structure of an inert gas supply apparatus according to the present invention.

FIG. 3 is a schematic view showing the internal structure of the crushing apparatus according to the present invention.

The explanation of each reference number in the figure is: the device comprises an inert gas supply device 10, an air compressor 11, a particulate filter 12, a moisture filter 13, an air storage tank 14, a nitrogen making machine 15, a nitrogen storage tank 16, a gas conveying pipe 17, a feeding device 20, a hopper 21, a first feeding control valve 22, a second feeding control valve 23, a feeding machine 24, a crushing device 30, a grading cavity 31, a feeding pipe 32, a feeding hole 320, a crushing cavity 33, a lower crusher chamber 34, a discharging hole 35, a grading cylinder 36, a hammer head 37, a crusher hammer head 38, a partition plate 39, an air inlet 310, a crusher main shaft 311, an air return hole 312, a return air control valve 313, a discharging collection device 40, an air pressure gauge 41, an emptying valve 42, a collector 43, a pneumatic rapping 44, a discharging control valve 45, a finished product discharging hole 46, a gas circulation device 50, a security filter 51, an induced draft fan 52, a return air pipeline 53 and a grading wheel device 60.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the present invention will be further described in detail with reference to the following embodiments.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. The terms first, second and the like, if any, are used for distinguishing technical features only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

As shown in fig. 1, the inert gas protected pulverizing apparatus according to the present invention comprises a pulverizing device 30, an inert gas supply device 10, a feeding device 20, a classifying wheel device 60 and an output collecting device 40. Wherein, the inert gas supply device 10 is connected with the air inlet 310 of the crushing device 30. The feeding device 20 is connected with the feeding port 320 of the pulverizing device 30. And the grading wheel device 60 is arranged at the top discharge hole 35 of the crushing device 30. And the discharged material collecting device 40 is connected with the grading wheel device 60.

The embodiment of the application supplies inert gas such as nitrogen gas to the reducing mechanism 30 through the inert gas supply device 10, can make the influence of whole crushing process isolated oxygen and moisture to the powder to guarantee that inflammable and explosive raw materials, easy oxidation raw materials can not receive the influence when kibbling.

As shown in fig. 2, the inert gas supply device 10 includes a nitrogen generator 15, a nitrogen gas tank 16, and a gas delivery pipe 17, which are connected in this order. The other end of the gas delivery pipe 17 is connected with the air inlet 310 of the crushing device 30.

The nitrogen has a chemical formula of N2, is colorless and odorless, and is inactive in chemical property, so that the nitrogen can be used as filling gas for crushing materials to well prevent the materials from being exploded or oxidized.

In some embodiments, the inert gas supply device 10 further comprises an air compressor 11, a particulate filter 12, a moisture filter 13, and an air storage tank 14, which are connected in series. The particulate filter 12 can filter out large particulate impurities in the air, making the air cleaner. The moisture filtering device 13 can filter moisture in the air, and prevent the moisture from entering the crushing device 30 to affect the material. The air storage tank 14 is also connected to the nitrogen generator 15. The air tank 14 stores the purified air for supply to the nitrogen generator 15 as a nitrogen generating raw material for the nitrogen generator 15.

In some embodiments, as shown in fig. 3, the crushing device 30 includes a classifying cylinder 36, a crusher main shaft 311, a hammer head fixing disk 37, and a crusher hammer head 38.

Wherein, the inner region of the classifying cylinder 36 is divided into a classifying chamber 31, a pulverizing chamber 33 and a pulverizer lower chamber 34 in order from top to bottom. A crusher main shaft 311 is provided at the axial centers of the crushing chamber 33 and the crusher lower chamber 34, and the crusher main shaft 311 is rotated by other power equipment such as a motor.

The hammer head fixing disc 37 is fixedly arranged on the crusher main shaft 311, the crusher hammer head 38 is fixedly arranged on the hammer head fixing disc 37, and the hammer head fixing disc 37 and the crusher hammer head 38 are both positioned in the crushing cavity 33.

A partition plate 39 is further arranged between the crushing cavity 33 and the lower chamber 34 of the crusher, and a vent hole is formed in the partition plate 39.

The air inlet 310 is disposed in the pulverizer lower chamber 34. The feed port 320 is located at the bottom of the classifying chamber 31. The discharge port 35 is located at the top of the classifying chamber 31.

The inert gas supplied from the inert gas supply device 10 enters the cylindrical body 36 from the air inlet 310 in the lower chamber 34 of the pulverizer, and sequentially enters the pulverizing chamber 33 and the classifying chamber 31 from the circular annular gap-shaped vent hole opened only in the center of the partition 39 upward. When the material entering from the feed inlet 320 is crushed in the crushing cavity 33 by the crusher hammer 38 driven by the crusher main shaft 311 to rotate, the inert gas fills the whole crushing space to prevent the material from contacting oxygen and moisture during crushing.

In some embodiments, as shown in fig. 3, the pulverizing device 30 further comprises a feeding pipe 32, and the feeding pipe 32 is disposed in the classifying chamber 31 and connected to the feeding device 20 through the outside of the classifying cylinder 36. The end of the feeding pipe 32 located in the grading chamber 31 is the feeding port 320, and the feeding port 320 can be accurately located right above the crusher hammer 38 through the feeding pipe 32, so that the material can be sufficiently crushed by the crusher hammer 38 after entering the material.

The classifying wheel device 60 has classifying vanes extending into the classifying chamber 31, and the classifying vanes can classify the dispersed materials. Under the action of strong centrifugal force generated by the classifying blades rotating at high speed, the coarse and fine materials moving to the classifying cavity 31 along with the ascending air flow are separated, the fine particles meeting the particle size requirement enter the discharging and collecting device 40 through the classifying blades, and the coarse particles fall to the crushing cavity 33 to be continuously crushed.

In some embodiments, as shown in fig. 1, the feeding device 20 comprises a hopper 21 and a feeder 24 connected in series. The feeder 24 is connected to the feed port 320 of the comminution apparatus 30. The hopper 21 is connected with the feeder 24.

In some embodiments, as shown in fig. 1, the feed device 20 further comprises a first feed control valve 22 and a second feed control valve 23. The first feeding control valve 22 and the second feeding control valve 23 are sequentially disposed between the hopper 21 and the feeder 24. The first feeding control valve 22 and the second feeding control valve 23 are alternately opened and closed to ensure the pressure inside the crushing device 30 to be balanced during feeding.

In some embodiments, as shown in fig. 1, the outgoing collection device 40 comprises a collector 43, an outgoing control valve 45, a pneumatic rapping 44, and an emptying valve 42. Wherein the collector 43 is connected with the classifying wheel device 60; and the bottom of the collector 43 has a product outlet 46. The discharging control valve 45 is arranged at the finished product discharging port 46. The pneumatic rapping 44 is arranged on the collector 43 and is used for rapping the cavity wall of the collector 43, so that the materials are prevented from being accumulated on the cavity wall of the collector 43, and the materials can be smoothly discharged from the finished product discharge hole 46. An evacuation valve 42 is provided at the top of the accumulator 43.

In some embodiments, as shown in fig. 1, the effluent collection means 40 further comprises a gas pressure gauge 41. The pressure gauge 41 can display the pressure in the accumulator 43 in real time, and if the pressure in the accumulator 43 is greater than the safe pressure, a part of the inert gas in the accumulator 43 can be exhausted through the exhaust valve 42.

In some embodiments, as shown in fig. 1, the comminution apparatus further comprises a gas circulation device 50. The air inlet of the air circulation device 50 is connected with the air outlet at the top of the discharged material collecting device 40, and the air outlet of the air circulation device 50 is connected with the air return opening 312 of the crushing device 30. The air return opening 312 is provided in the pulverizer lower chamber 34. The gas circulation device 50 can return the inert gas to the pulverizing device 30 for reuse, thereby saving resources.

In some embodiments, as shown in fig. 1, the gas circulation device 50 includes a cartridge filter 51, an induced draft fan 52, and a return duct 53. Wherein, the cartridge filter 51 is connected with the air outlet at the top of the discharge collecting device 40. The induced draft fan 52 is connected with the cartridge filter 51. One end of the return air duct 53 is connected to the induced draft fan 52, and the other end is connected to the return air inlet 312 of the pulverizer 30. The cartridge filter 51 is used for preventing the collector 43 from leaking powder to the induced draft fan 52 due to the breakage of the cloth bag, filtering substances such as dust in the inert gas and ensuring the purity of the reusable inert gas. The induced draft fan 52 can improve strong suction and blowing capacity.

In the present embodiment, the collector 43 can be selected as a pulse bag type dust collector.

In some embodiments, as shown in FIG. 3, the air return openings 312 are provided in two and are oppositely disposed within the shredder lower chamber 34. The return air duct 53 is connected to both of the return air inlets 312. The provision of two return air inlets 312 improves the return air efficiency.

In some embodiments, as shown in fig. 3, a return air control valve 313 is provided at the connection between the return air inlet 312 and the return air duct 53, and the return air control valve 313 can be opened and closed as needed to adjust the size of the return air.

In some embodiments, an oxygen concentration sensor is also provided within staging cylinder 36. As the material enters the feeding device 20, it is inevitable to introduce some oxygen. In order to reduce the oxygen concentration in the grading cylinder 36, an oxygen concentration sensor is additionally arranged in the grading cylinder, and when the oxygen concentration sensor detects that the oxygen concentration in the grading cylinder 36 exceeds the standard, a worker is informed to add inert gas to reduce the oxygen concentration in the grading cylinder 36, so that oxidation or explosion caused by overhigh oxygen concentration is avoided. If a control device is added, the gas filling of the inert gas supply device 10 can be automatically controlled by the control device after the oxygen concentration sensor detects that the oxygen concentration in the grading cylinder 36 exceeds the standard, and the automation degree is higher.

The application process of the embodiment of the application is as follows: when the equipment is started, firstly, the inert gas (pure air or nitrogen can be selected according to different crushed materials) is continuously filled into the whole system, and the air in the system is replaced until the whole system reaches a specified value. Then, the material is fed into the crushing device 30 through the feeding device 20, the crushed material is impacted by the hammer, the blade, the rod and the like on the crusher hammer 38 rotating at a high speed, and the material is subjected to superfine crushing by virtue of the strong impact between the material and the crusher hammer 38, the high-speed impact between the materials flying at a high speed and the shearing and grinding between the crusher hammer 38 and the grading cylinder 36. The crushed material rises with the air current and enters the grading cavity 31, when the grading blade rotates at a high speed, the particles are subjected to centrifugal force generated by the grading blade and centripetal force generated by viscosity action of the rising air current, namely, coarse particles larger than the required grading particle size cannot enter the grading cavity 31 and return to the crushing cavity 33 to be continuously crushed, fine particles reaching the requirement enter the grading blade to be collected by the discharge collecting device 40 along with the air current, inert gas (or pure air) in the process is filtered and subjected to gas-solid separation, then the gas enters the induced draft fan 52 through the security filter 51, returns to the lower chamber 34 of the crusher through the return air pipeline 53 to be recycled, and enters the crushing device 30. During the system operation, the nitrogen supplement operation is automatically completed by the instrument according to the oxygen content detected by the oxygen concentration sensor in the grading cylinder 36 without manual intervention.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-described preferred embodiments should not be taken as limiting the invention, which is to be limited only by the scope of the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.

Claims

1. A pulverizing apparatus with inert gas shielding, characterized in that the pulverizing apparatus comprises:

a crushing device (30);

the inert gas supply device (10) is connected with an air inlet (310) of the crushing device (30);

the feeding device (20) is connected with the feeding hole (320) of the crushing device (30);

the grading wheel device (60) is arranged at a discharge hole (35) at the top of the crushing device (30); and the number of the first and second groups,

and the discharged material collecting device (40) is connected with the grading wheel device (60).

2. Comminution plant as in claim 1, characterized in that the comminution means (30) comprise:

the grading cylinder (36), the inner area of the grading cylinder (36) is divided into a grading cavity (31), a crushing cavity (33) and a crusher lower chamber (34) from top to bottom in sequence;

a crusher main shaft (311) provided at the axial center of the crushing chamber (33) and the crusher lower chamber (34);

the hammer head fixing disc (37) is fixedly arranged on the main shaft (311) of the grinder and is positioned in the grinding cavity (33); and (c) a second step of,

the crusher hammer head (38) is fixedly arranged on the hammer head fixing disc (37);

a partition plate (39) is arranged between the crushing cavity (33) and the lower chamber (34) of the crusher, and a vent hole is formed in the partition plate (39);

the air inlet (310) is arranged in the lower chamber (34) of the pulverizer; the feed inlet (320) is positioned at the bottom of the grading cavity (31); the discharge hole (35) is positioned at the top of the grading cavity (31).

3. Comminution plant as in claim 1, in which the feed device (20) comprises:

a feeder (24) connected to the feed inlet (320) of the comminution device (30); and the number of the first and second groups,

a hopper (21) connected with the feeder (24).

4. A comminution apparatus as claimed in claim 3 in which: the feeding device (20) further comprises a first feeding control valve (22) and a second feeding control valve (23); the first feeding control valve (22) and the second feeding control valve (23) are sequentially arranged between the hopper (21) and the feeding machine (24).

5. The comminution apparatus according to claim 1, characterized in that the inert gas supply device (10) comprises:

a nitrogen generator (15);

the nitrogen gas storage tank (16) is connected with the nitrogen making machine (15); and the number of the first and second groups,

and one end of the gas conveying pipe (17) is connected with the nitrogen gas storage tank (16), and the other end of the gas conveying pipe is connected with an air inlet (310) of the crushing device (30).

6. The comminution apparatus according to claim 5, characterized in that the inert gas supply device (10) further comprises:

an air compressor (11);

a particulate filter (12) connected to the air compressor (11);

a moisture filtering device (13) connected to the particulate filter (12); and the number of the first and second groups,

an air storage tank (14) connected to the moisture filtering device (13);

wherein the air storage tank (14) is also connected with the nitrogen making machine (15).

7. Comminution plant as in claim 1, in which the outfeed collection device (40) comprises:

a collector (43) connected to the classifier wheel assembly (60); and the bottom of the collector (43) is provided with a finished product outlet (46);

the discharge control valve (45) is arranged at the finished product discharge port (46);

a pneumatic rapping (44) arranged on the collector (43); and the number of the first and second groups,

and the emptying valve (42) is arranged at the top of the collector (43).

8. The comminution apparatus of claim 7, wherein: the comminution apparatus further comprises a gas circulation device (50); an air inlet of the gas circulating device (50) is connected with an air outlet at the top of the discharged material collecting device (40), and an air outlet of the gas circulating device (50) is connected with an air return inlet (312) of the crushing device (30); the air return opening (312) is arranged in the lower chamber (34) of the pulverizer.

9. A comminution plant as claimed in claim 8, in which the gas circulation device (50) comprises:

the cartridge filter (51) is connected with an air outlet at the top of the discharge collecting device (40);

the induced draft fan (52) is connected with the cartridge filter (51); and the number of the first and second groups,

and one end of the air return pipeline (53) is connected with the induced draft fan (52), and the other end of the air return pipeline is connected with an air return opening (312) of the crushing device (30).

10. A comminution apparatus as claimed in claim 9 in which: two air return openings (312) are arranged and are oppositely arranged in the lower chamber (34) of the pulverizer; the air return pipeline (53) is simultaneously connected with the two air return openings (312).