Nitro raw material crushing and separating system

Abstract

The invention provides a nitro raw material crushing and separating system which comprises an air supply unit, a supergravity crushing unit, a negative pressure feeding unit, a cyclone separation unit and a dust removal unit, the supergravity crushing unit is provided with an air supply cavity and a crushing cavity which are communicated with each other, and the crushing cavity is located on the side, close to the cyclone separation unit, of the air supply cavity; the air supply unit is communicated with the air supply cavity, the negative pressure feeding unit is communicated with the crushing cavity, a crushing cutter head and a supergravity material selecting disc are rotationally connected in the crushing cavity, and the supergravity material selecting disc is arranged close to the discharging side of the crushing cavity; the negative pressure feeding unit comprises a vacuum feeding tank, a vacuum pipeline, a nitrogen pipeline and a stock bin pipeline. According to the nitryl raw material crushing and separating system, the negative pressure feeding unit is used for feeding the materials to the supergravity crushing unit, the safety of nitryl raw material medicine in the operation process is improved, the supergravity crushing unit is arranged, the consistency of the crushed granularity of the materials can be guaranteed, effective control over the granularity of the materials is achieved, and the working efficiency is improved. And the crushing and separating quality is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of pulverizing and separating nitro materials, and more specifically, relates to a pulverizing and separating system for nitro raw materials. Background Art

[0002] Most nitro APIs or new materials are basic reaction media or intermediate products in chemical synthesis, accounting for a considerable proportion in pharmaceutical chemical production. Due to the unique physical and chemical instability and danger of nitro materials, it is required to implement very high standards in the main production processes of chemical synthesis, refining, drying, crushing, separation, packaging, etc. of nitro materials. Especially in the production process of crushing and separation, due to its poor controllability, higher requirements are put forward for the safety of production equipment.

[0003] After testing nitro materials such as nifedipine and metronidazole, it was determined that the above materials are combustible and explosive dusts. The minimum ignition energy of the above nitro materials is less than 10mJ, which shows that at normal temperature and pressure, nitro substances are particularly sensitive to ignition by static electricity and other factors, and are prone to production safety accidents.

[0004] In the prior art, when crushing and separating the above materials, traditional mechanical crushing and extrusion molding methods are mostly used. The above methods will inevitably cause friction to generate static electricity or cause the materials to overheat. The above uncontrollable factors cause the flammable and explosive characteristics and dangerous characteristics of nitro materials, aggravating the safety risks in the production process. Summary of the invention

[0005] The object of the present invention is to provide a nitro raw material crushing and separation system, which can effectively improve the crushing and separation efficiency of the material and improve the safety in the production process.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a nitro raw material crushing and separation system, including an air supply unit, a supergravity crushing unit, a negative pressure feeding unit, a cyclone separation unit and a dust removal unit, the supergravity crushing unit has an air supply chamber and a crushing chamber that are interconnected, the crushing chamber is located on the side of the air supply chamber close to the cyclone separation unit, the air supply unit is connected to the air supply chamber, the negative pressure feeding unit is connected to the crushing chamber, a crushing knife disc and a supergravity selection disc are rotatably connected in the crushing chamber, and the supergravity selection disc is arranged close to the discharge side of the crushing chamber; Among them, the negative pressure feeding unit includes a vacuum feeding tank for containing materials and a vacuum pipeline, a nitrogen pipeline and a silo pipeline respectively connected to the vacuum feeding tank. The vacuum pipeline is used to form a negative pressure environment in the vacuum feeding tank, the nitrogen pipeline is used to supply nitrogen to the vacuum feeding tank, and the silo pipeline is used to supply materials to the vacuum feeding tank.

[0007] In one possible implementation, the vacuum pipeline is connected to the top of the vacuum feed tank, the nitrogen pipeline is connected to the middle of the vacuum feed tank through a gas storage bag, the silo pipeline is connected to the bottom of the vacuum feed tank, and the lower opening of the vacuum feed tank is also provided with a discharge rotary valve; the crushing cutter disc is rotatably connected to the crushing chamber through a horizontally extending rotating shaft, and the lower opening of the vacuum feed tank is connected to a horizontally extending conveying auger, and the discharge end of the conveying auger is connected to the crushing chamber for supplying material to the crushing chamber.

[0008] In some embodiments, the ultra-gravity material selection disk is rotatably connected to the crushing chamber via a bearing transmission assembly sleeved on the outer circumference of the rotating shaft. The ultra-gravity crushing unit also includes a crushing motor for driving the rotating shaft to rotate and a wind selection motor for driving the bearing transmission assembly. The crushing motor and the rotating shaft, as well as the wind selection motor and the bearing transmission assembly are respectively connected via anti-static belts.

[0009] In a possible implementation, the cyclone separation unit includes a frame, a cyclone separator and a screener. The cyclone separator is arranged on the upper part of the frame and is used for cyclone separation of crushed materials and dust. The screener is arranged below the cyclone separator and is used for screening the crushed materials.

[0010] In a possible implementation, a fan is further provided at the lower end of the cyclone separator, and the fan is turned off to stop the cyclone separator from running so as to discharge the materials in the cyclone separator onto the screener.

[0011] In some embodiments, vibrating air hammers are provided on both sides of the cyclone separator, wherein one vibrating air hammer is located at the upper portion of the cyclone separator, and the other vibrating air hammer is located at the lower portion of the cyclone separator.

[0012] In some embodiments, a rotating material detector is connected to the bottom of the cyclone separator, and the rotating material detector is used to detect the material height in the cyclone separator.

[0013] In a possible implementation, a plurality of cyclone separation units are provided, and the plurality of cyclone separation units are sequentially arranged in series. The screener includes a plurality of screening chambers spaced apart from each other, and each screening chamber is connected to a buffer silo.

[0014] In a possible implementation, the dust removal unit includes a dust removal cylinder and a membrane filter cartridge disposed in the dust removal cylinder. The outlet side of the dust removal cylinder is also connected to an exhaust unit, and a muffler is provided on the exhaust unit.

[0015] In one possible implementation, the air inlet end of the air supply unit is connected to a fresh air dry cooling air conditioner, which includes a steam dehumidifier, a low-temperature water cooler and a multi-effect filter connected in sequence. The air outlet end of the multi-effect filter is connected to the air inlet end of the air supply unit for supplying dry cold air into the air supply unit.

[0016] Compared with the prior art, the scheme shown in the embodiment of the present application is a nitro raw material crushing and separation system provided in the embodiment of the present application, which uses a blower group to supply air to the ultra-gravity crushing unit so as to form an ultra-gravity environment in the ultra-gravity crushing unit, and supplies materials to the ultra-gravity crushing unit with the help of a negative pressure feeding unit, thereby improving the safety of the nitro raw material operation process. The setting of the ultra-gravity crushing unit can ensure the consistency of the crushing particle size of the material and realize the effective control of the material particle size. Subsequently, the separation operation is carried out by the cyclone separation unit, and the dust removal treatment is carried out by the dust removal unit, thereby improving the crushing quality and crushing efficiency of the material and avoiding the discharge of pollutants. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of a nitro raw material crushing and separation system provided in an embodiment of the present invention; Figure 2 For the embodiment of the present invention Figure 1 Structural diagram of the medium-fresh air dry cooling air conditioner; Figure 3 For the embodiment of the present invention Figure 1 Structural schematic diagram of medium negative pressure feeding unit; Figure 4 For the embodiment of the present invention Figure 1 Schematic diagram of the structure of the super gravity crushing unit; Figure 5 For the embodiment of the present invention Figure 1 A schematic diagram of the structure of the intermediate cyclone separation unit; Figure 6 A schematic diagram of a replacement detection process of a negative pressure feeding unit during startup provided by an embodiment of the present invention; Figure 7 A schematic diagram of the process flow of the negative pressure feeding unit feeding and discharging process provided in an embodiment of the present invention; Figure 8 A vector force diagram of materials in a supergravity crushing unit provided in an embodiment of the present invention.

[0019] Among them, the reference numerals in the figure are: 1. Air supply unit; 2. Super gravity crushing unit; 21. Air supply chamber; 22. Crushing chamber; 23. Crushing blade; 24. Super gravity selection disc; 25. Rotating shaft; 26. Bearing transmission assembly; 27. Crushing motor; 28. Air selection motor; 29. ​​Anti-static belt; 3. Negative pressure feeding unit; 31. Vacuum feeding tank; 32. Vacuum pipeline; 321. Vacuum pipeline pressure reducing valve; 322. Vacuum pipeline pneumatic ball valve; 33. Nitrogen pipeline; 331. Nitrogen pipeline pressure reducing valve; 332. Nitrogen pipeline pneumatic ball valve; 333. Air storage bag; 334, air storage bag solenoid valve; 34, silo pipeline; 341, silo pipeline pneumatic ball valve; 35, unloading rotary valve; 4, cyclone separation unit; 41, rack; 42, cyclone separator; 43, screener; 44, fan shut-off; 45, vibrating air hammer; 46, buffer silo; 5, dust removal unit; 51, dust removal cylinder; 52, membrane filter cartridge; 6, conveying auger; 7, exhaust unit; 71, silencer; 8, fresh air dry cooling air conditioner; 81, steam dehumidifier; 82, low-temperature water cooler; 83, multi-effect filter. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0022] Please also read Figures 1 to 8, the nitro raw material crushing and separation system provided by the present invention is now described. The nitro raw material crushing and separation system comprises an air supply unit 1, an ultra-gravity crushing unit 2, a negative pressure feeding unit 3, a cyclone separation unit 4 and a dust removal unit 5, the ultra-gravity crushing unit 2 has an air supply chamber 21 and a crushing chamber 22 which are connected to each other, the crushing chamber 22 is located on the side of the air supply chamber 21 close to the cyclone separation unit 4, the air supply unit 1 is connected to the air supply chamber 21, the negative pressure feeding unit 3 is connected to the crushing chamber 22, a crushing blade 23 and an ultra-gravity selection disc 24 are rotatably connected in the crushing chamber 22, and the ultra-gravity selection disc 24 is arranged close to the discharge side of the crushing chamber 22; Among them, the negative pressure feeding unit 3 includes a vacuum feeding tank 31 for containing materials and a vacuum pipeline 32, a nitrogen pipeline 33 and a silo pipeline 34 respectively connected to the vacuum feeding tank 31. The vacuum pipeline 32 is used to form a negative pressure environment in the vacuum feeding tank 31, the nitrogen pipeline 33 is used to supply nitrogen to the vacuum feeding tank 31, and the silo pipeline 34 is used to supply materials to the vacuum feeding tank 31.

[0023] Compared with the prior art, the nitro raw material pulverizing and separation system provided in the present embodiment uses the air supply unit 1 to supply air to the supergravity pulverizing unit 2 so as to form a supergravity environment in the supergravity pulverizing unit 2, and supplies materials to the supergravity pulverizing unit 2 with the help of the negative pressure feeding unit 3, thereby improving the safety of the nitro raw material operation process. The setting of the supergravity pulverizing unit 2 can ensure the consistency of the material's pulverization particle size and realize the effective control of the material particle size. Subsequently, the separation operation is performed through the cyclone separation unit 4, and the dust removal treatment is performed with the help of the dust removal unit 5, thereby improving the material pulverization quality and pulverization efficiency and avoiding the discharge of pollutants.

[0024] In this embodiment, supergravity technology refers to a technical means of placing materials in a high centrifugal force field through high-speed rotation to achieve extraordinary physical and chemical phenomena. The supergravity principle refers to the phenomenon that the restraining force on an object is greater than its own gravity. When an object accelerates upward or decelerates downward, supergravity will occur. This is because the object will produce a reverse acceleration relative to the carrier due to inertia. The direction of this acceleration is the same as the direction of gravity, resulting in a pressure or tension greater than the gravity of the object. The above technology can effectively improve the material crushing efficiency.

[0025] See also Figure 8Under the combined action of its own gravity, the thrust of the air supply unit 1, the shear force of the crushing blade 23, the centripetal force of the supergravity material selection disc 24, and the suction of the exhaust unit 7, a stable vector force is formed on the crushed material in the crushing chamber 22, ensuring the uniformity of the particle size of the finished product after crushing. The use of the supergravity crushing unit 2 can effectively solve the problems of uncontrollable product particle size, poor particle size uniformity, high temperature, and easy deterioration of material properties during the crushing of nitro-based APIs, thereby ensuring the effective crushing of the material. On this basis, the cyclone separation unit 4 is used to achieve the separation of finished products of different particle sizes, greatly reducing the rework caused by different particle sizes of finished products, and greatly improving the yield and one-time qualified rate of the crushed finished products.

[0026] The negative pressure feeding unit 3 can automatically feed, avoiding the problem of high labor intensity of traditional manual feeding and improving production and operation efficiency. By setting a nitrogen pipeline 33 connected to the vacuum feeding tank 31, a nitrogen protection effect is formed, which has the advantages of safe and closed production, low risk of foreign matter in finished products, and high qualified rate of finished products, while ensuring the safety of nitro-based APIs during the crushing process. The negative pressure feeding unit 3 also includes an oxygen content detector, which can detect the oxygen content in the vacuum feeding tank 31 in real time to avoid excessive oxygen content affecting the safety of the equipment, thereby realizing negative pressure nitrogen protection of the equipment.

[0027] In one possible implementation, please also refer to Figure 1 and Figure 3 The vacuum pipeline 32 is connected to the top of the vacuum feeding tank 31, the nitrogen pipeline 33 is connected to the middle of the vacuum feeding tank 31 through the gas storage bag 333, the silo pipeline 34 is connected to the bottom of the vacuum feeding tank 31, and the lower opening of the vacuum feeding tank 31 is also provided with a discharge rotary valve 35; the crushing blade 23 is rotatably connected to the crushing chamber 22 through a horizontally extending rotating shaft 25, and the lower opening of the vacuum feeding tank 31 is connected to a horizontally extending conveying auger 6, and the discharge end of the conveying auger 6 is connected to the crushing chamber 22 for supplying materials into the crushing chamber 22.

[0028] In this embodiment, the vacuum pipeline 32, the nitrogen pipeline 33 and the silo pipeline 34 are respectively located at the top, middle and bottom of the vacuum feeding tank 31, so that the vacuum feeding tank 31 can form a negative pressure environment for feeding operations and can also provide a nitrogen protective atmosphere for the material.

[0029] The conveying auger 6 at the bottom of the vacuum feeding tank 31 can convey the material to the crushing chamber 22 of the supergravity crushing unit 2 in an orderly manner, so that the material feeding speed remains stable, the material is fully crushed, the crushing performance of the supergravity crushing unit 2 is guaranteed, and the crushing efficiency of the material is improved.

[0030] The vacuum pipeline 32 is provided with a vacuum pipeline pressure reducing valve 321 and a vacuum pipeline pneumatic ball valve 322, the nitrogen pipeline 33 is provided with a nitrogen pipeline pressure reducing valve 331 and a nitrogen pipeline pneumatic ball valve 332, the silo pipeline 34 is provided with a silo pipeline pneumatic ball valve 341, and the gas storage bag 333 is provided with a gas storage bag solenoid valve 334 for controlling the supply of nitrogen into the vacuum feeding tank 31.

[0031] When the negative pressure feeding unit 3 is started up, a replacement test must be performed first. The system self-check is performed first, the nitrogen pipeline pneumatic ball valve 332 is opened, the nitrogen pipeline pressure reducing valve 331 is adjusted to adjust the pressure, and then the nitrogen pipeline pneumatic ball valve 332 is closed. At this time, the pressure of the nitrogen pipeline 33 is qualified, and the gas storage bag solenoid valve 334 is opened to purge the vacuum feeding tank 31 with nitrogen, and then the gas storage bag solenoid valve 334 is closed. The replacement frequency is set as needed, that is, the number of nitrogen purges is set, and then the unloading rotary valve 35 is opened to discharge the gas to be equal to the atmospheric pressure, and after ensuring that the oxygen content is qualified, the unloading rotary valve 35 is closed, and then the negative pressure feeding unit 3 can be fed.

[0032] The process of feeding and discharging of the negative pressure feeding unit 3 is as follows: open the vacuum pipeline pneumatic ball valve 322, set the negative pressure time, and close the vacuum pipeline pneumatic ball valve 322 after the set time is reached. At this time, the inside of the vacuum feeding tank 31 is in a negative pressure state, open the silo pipeline pneumatic ball valve 341, set the feeding time, and close the silo pipeline pneumatic ball valve 341 after the set time is reached. At this time, the feeding operation of the material is completed. After that, open the nitrogen pipeline pneumatic ball valve 332, set the nitrogen feeding time, and close the nitrogen pipeline pneumatic ball valve 332 after the set time is reached. At the same time, set the purge and unloading interlock, open the gas storage bag solenoid valve 334, set the purge time, and close the gas storage bag solenoid valve 334 after the set time is reached. At this time, the pressure inside the vacuum feeding tank 31 is consistent with the external pressure. Then, the material discharging rotary valve 35 is opened, and the material discharging time is set. When the set time is reached, the material discharging rotary valve 35 is closed. At this time, the material is lowered onto the conveying auger 6 and sent to the supergravity crushing unit 2 for crushing.

[0033] In some embodiments, please refer to Figure 4 The supergravity material selection plate 24 is rotatably connected to the crushing chamber 22 through a bearing transmission assembly 26 sleeved on the outer periphery of the rotating shaft 25. The supergravity crushing unit 2 also includes a crushing motor 27 for driving the rotating shaft 25 to rotate and a wind selection motor 28 for driving the bearing transmission assembly 26. The crushing motor 27 and the rotating shaft 25 are connected, and the wind selection motor 28 and the bearing transmission assembly 26 are connected respectively through anti-static belts 29.

[0034] In this embodiment, the pulverizing motor 27 drives the pulverizing blade 23 to rotate through the antistatic belt 29. The antistatic belt 29 has good antistatic performance to prevent safety accidents caused by static electricity of nitro raw materials. A pulley is connected to the output shaft of the pulverizing motor 27, and a pulley is also provided at the input end of the rotating shaft 25. The two pulleys are connected through the antistatic belt 29, thereby driving the pulverizing blade 23 to rotate, thereby forming a cutting and pulverizing effect on the material.

[0035] Similarly, a pulley is connected to the output shaft of the air separation motor 28, and a pulley is also provided at the input end of the bearing transmission assembly 26. The two pulleys are connected by an anti-static belt 29, and the two pulleys are also connected by an anti-static belt 29, thereby driving the supergravity selection disc 24 to rotate, so that the material that meets the crushing requirements can be smoothly discharged from the outlet of the crushing chamber 22 and sent to the cyclone separation unit 4 for subsequent separation.

[0036] In one possible implementation, see Figure 5 The cyclone separation unit 4 includes a frame 41, a cyclone separator 42 and a sifter 43. The cyclone separator 42 is arranged on the upper part of the frame 41 and is used for cyclone separation of crushed materials and dust. The sifter 43 is arranged below the cyclone separator 42 and is used for sifting the crushed materials.

[0037] In this embodiment, the cyclone separation unit 4 is connected to the ultra-gravity crushing unit 2 through a negative pressure pipeline. The main axis of the cyclone separator 42 is arranged in the up and down direction and is installed on the frame 41. The cyclone separator 42 can receive materials and perform cyclone separation on the materials, so that the materials that meet the particle size requirements are discharged from the lower mouth of the cyclone separation unit 4 to the sifter 43. The sifter 43 is used to perform multi-stage screening on the materials, so that materials with different particle sizes can be graded and stored.

[0038] In one possible implementation, see Figure 5 A fan 44 is also provided at the lower end of the cyclone separator 42 . The fan 44 is used to stop the cyclone separator 42 from running so as to unload the materials in the cyclone separator 42 onto the sifter 43 .

[0039] In this embodiment, when the material at the bottom of the cyclone separator 42 reaches a certain height, the fan 44 at the bottom of the cyclone separator 42 can stop supplying air and stop the cyclone separator 42 from working. The material is further screened by the screener 43 in the cyclone separator 42, so that the material is graded into finished products with a variety of different particle size specifications.

[0040] In some embodiments, please refer to Figure 5 Vibrating air hammers 45 are provided on both sides of the cyclone separator 42 , one of the vibrating air hammers 45 is located at the upper part of the cyclone separator 42 , and the other vibrating air hammer 45 is located at the lower part of the cyclone separator 42 .

[0041] In this embodiment, the vibrating air hammers 45 on both sides of the cyclone separator 42 can vibrate the cyclone separator 42, thereby enhancing the disturbance of the material in the cyclone separator 42, so that the material and impurities and dust can be effectively separated under the action of wind, thereby achieving effective removal of impurities and dust, and ensuring that the separated material falls to the inner bottom of the cyclone separator 42.

[0042] Specifically, two vibrating air hammers 45 are respectively located on both sides of the cyclone separator 42, and can vibrate different positions on both sides of the cyclone separator 42. The two are also arranged in a spaced-apart manner in the up and down directions, which can further increase the range of vibration radiation, avoid accumulation of materials in the cyclone separator 42, and facilitate improving the separation efficiency of the cyclone separator 42.

[0043] In some embodiments, please refer to Figure 5 The bottom of the cyclone separator 42 is connected with a rotating material probe, which is used to detect the height of the material in the cyclone separator 42. The rotating material probe can effectively detect the material level in the cyclone separator 42, and then determine whether it needs to meet a certain height requirement and whether it needs to perform a material unloading operation.

[0044] In a possible implementation, a plurality of cyclone separation units 4 are provided, and the plurality of cyclone separation units 4 are sequentially arranged in series. The screener 43 includes a plurality of screening chambers spaced apart from each other, and each screening chamber is connected to a buffer silo 46 .

[0045] In this embodiment, a plurality of cyclone separation units 4 can be provided, and the plurality of cyclone separation units 4 can be connected in series in sequence, so that the material can be subjected to multiple cyclone separation effects, thereby meeting the material separation requirements and avoiding material waste. The sifter 43 can effectively sieve materials of different particle sizes, and the plurality of buffer bins 46 can respectively accommodate materials of different particle sizes, thereby realizing separate storage of materials of different particle sizes and meeting the material sieving requirements.

[0046] In one possible implementation, see Figure 1 The dust removal unit 5 includes a dust removal cylinder 51 and a membrane filter cylinder 52 arranged in the dust removal cylinder 51. The outlet side of the dust removal cylinder 51 is also connected to an exhaust unit 7, and a muffler 71 is provided on the exhaust unit 7.

[0047] In this embodiment, the membrane filter cartridge 52 in the dust removal unit 5 can effectively filter the holes in the dust and other particles, and realize the centralized collection of the above particles. The membrane filter cartridge 52 is made of anti-static material to ensure the safety of the filtering process. The exhaust unit 7 on the outlet side of the dust removal cylinder 51 can discharge the airflow in an orderly manner, and use the muffler 71 to mute the sound to avoid generating much noise.

[0048] In one possible implementation, see Figure 2 The air inlet end of the air supply unit 1 is connected to a fresh air dry cooling air conditioner 8, which includes a steam dehumidifier 81, a low-temperature water cooler 82 and a multi-effect filter 83 connected in sequence. The air outlet end of the multi-effect filter 83 is connected to the air inlet end of the air supply unit 1, and is used to supply dry cold air to the air supply unit 1.

[0049] In this embodiment, by arranging a fresh air dry cooling air conditioner 8 at the air inlet end of the air supply unit 1, the cleanliness of the air flow supplied to the supergravity crushing unit 2 is ensured. The steam dehumidifier 81 can dehumidify the air flow, and then the low-temperature water cooler 82 is used to cool the air path, and finally the multi-effect filter 83 is used to perform high-efficiency, medium-efficiency, and low-efficiency graded filtration to form fresh air, which meets the cleanliness requirements of the fresh air and meets the air supply requirements of the fresh air.

[0050] The above-mentioned nitro raw material crushing and separation system not only solves the problems of high labor intensity and low efficiency of traditional manual feeding through the negative pressure feeding unit 3, but also more effectively ensures the safety of nitro raw materials during the crushing process. The ultra-gravity crushing unit 2 makes the particle size of the material controllable and uniform, and solves the problem of easy deterioration of materials due to high temperature with the help of fresh air dry cooling air conditioner 8. The setting of multiple cyclone separation units 4 can realize the separation of finished products of different particle sizes, greatly improving the yield and one-time qualified rate of crushed finished products. The system adopts safe and closed production, reduces the risk of foreign matter in finished products, improves the qualified rate and yield of finished products, has good safety in use, can realize automated production, and improves processing efficiency and processing quality.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Nitro raw material crushing and separation system, characterized in that: The invention comprises an air supply unit (1), an ultra-gravity crushing unit (2), a negative pressure feeding unit (3), a cyclone separation unit (4) and a dust removal unit (5); the ultra-gravity crushing unit (2) comprises an air supply chamber (21) and a crushing chamber (22) which are connected to each other; the crushing chamber (22) is located on a side of the air supply chamber (21) close to the cyclone separation unit (4); the air supply unit (1) is connected to the air supply chamber (21); the negative pressure feeding unit (3) is connected to the crushing chamber (22); a crushing blade disc (23) and an ultra-gravity material selection disc (24) are rotatably connected in the crushing chamber (22); the ultra-gravity material selection disc (24) is arranged close to the discharge side of the crushing chamber (22); The negative pressure feeding unit (3) comprises a vacuum feeding tank (31) for containing materials, and a vacuum pipeline (32), a nitrogen pipeline (33) and a silo pipeline (34) respectively connected to the vacuum feeding tank (31); the vacuum pipeline (32) is used to form a negative pressure environment in the vacuum feeding tank (31); the nitrogen pipeline (33) is used to supply nitrogen to the vacuum feeding tank (31); and the silo pipeline (34) is used to supply materials to the vacuum feeding tank (31).

2. The nitro raw material crushing and separation system according to claim 1, characterized in that: The vacuum pipeline (32) is connected to the top of the vacuum feeding tank (31), the nitrogen pipeline (33) is connected to the middle of the vacuum feeding tank (31) through a gas storage bag (333), the silo pipeline (34) is connected to the bottom of the vacuum feeding tank (31), and a material discharge rotary valve (35) is also provided at the lower opening of the vacuum feeding tank (31); the crushing blade (23) is rotatably connected to the crushing chamber (22) through a horizontally extending rotating shaft (25), and the lower opening of the vacuum feeding tank (31) is connected to a horizontally extending conveying auger (6), and the discharge end of the conveying auger (6) is communicated with the crushing chamber (22) for supplying materials into the crushing chamber (22).

3. The nitro raw material crushing and separation system according to claim 2, characterized in that: The supergravity material selection disc (24) is rotatably connected to the pulverizing chamber (22) via a bearing transmission assembly (26) sleeved on the outer periphery of the rotating shaft (25); the supergravity pulverizing unit (2) further comprises a pulverizing motor (27) for driving the rotating shaft (25) to rotate and a wind selection motor (28) for driving the bearing transmission assembly (26); the pulverizing motor (27) and the rotating shaft (25) and the wind selection motor (28) and the bearing transmission assembly (26) are respectively connected via anti-static belts (29).

4. The nitro raw material crushing and separation system according to claim 1, characterized in that: The cyclone separation unit (4) comprises a frame (41), a cyclone separator (42) and a sifter (43); the cyclone separator (42) is arranged on the upper part of the frame (41) and is used for cyclone separation of crushed materials and dust; the sifter (43) is arranged below the cyclone separator (42) and is used for sifting the crushed materials.

5. The nitro raw material crushing and separation system according to claim 4, characterized in that: A fan (44) is also provided at the lower end of the cyclone separator (42). The fan (44) is used to stop the cyclone separator (42) from running so as to discharge the materials in the cyclone separator (42) onto the sifter (43).

6. The nitro raw material crushing and separation system according to claim 5, characterized in that: Vibrating air hammers (45) are provided on both sides of the cyclone separator (42), wherein one of the vibrating air hammers (45) is located at the upper part of the cyclone separator (42), and the other of the vibrating air hammers (45) is located at the lower part of the cyclone separator (42).

7. The nitro raw material crushing and separation system according to claim 6, characterized in that: The bottom of the cyclone separator (42) is connected to a rotating material detector, which is used to detect the height of the material in the cyclone separator (42).

8. The nitro raw material crushing and separation system according to claim 4, characterized in that: A plurality of cyclone separation units (4) are provided, and the plurality of cyclone separation units (4) are sequentially arranged in series. The screener (43) comprises a plurality of screening chambers spaced apart from each other, and each screening chamber is connected to a buffer bin (46).

9. The nitro raw material crushing and separation system according to any one of claims 1 to 8, characterized in that: The dust removal unit (5) comprises a dust removal cylinder (51) and a membrane filter cylinder (52) arranged in the dust removal cylinder (51); the outlet side of the dust removal cylinder (51) is also connected to an exhaust unit (7); and a silencer (71) is provided on the exhaust unit (7).

10. The nitro raw material crushing and separation system according to any one of claims 1 to 8, characterized in that: The air inlet end of the air supply unit (1) is connected to a fresh air dry cooling air conditioner (8), and the fresh air dry cooling air conditioner (8) comprises a steam dehumidifier (81), a low-temperature water cooler (82), and a multi-effect filter (83) which are connected in sequence. The air outlet end of the multi-effect filter (83) is connected to the air inlet end of the air supply unit (1) for supplying dry cold air into the air supply unit (1).

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