CN102407186A - Traditional Chinese medicine ultrafine powder sieve linkage system - Google Patents

Abstract

The invention discloses a traditional Chinese medicine superfine powder sieve linkage system which comprises a feeding device, a double-cylinder rod mill, a double-airflow micro powder sieve machine, two cyclone collectors and a pulse dust collector, wherein the double-cylinder rod mill is arranged on the feeding device; the discharge port of the double-cylinder rod mill is communicated with a mixed powder feeding pipe of the double-airflow micro powder screening machine through an electric control pneumatic valve; the fine powder discharge port of the double-airflow micro-powder screening machine is communicated with the other cyclone collector, and the discharge port of the cyclone collector is communicated with the feed port of the other powder mixer through the closed air discharger; the top of the cyclone collector is communicated with an air inlet of the pulse dust collector through a pipeline. The invention has the advantages that the double-cylinder rod mill is suitable for crushing single or mixed traditional Chinese medicinal materials rich in cellulose, and is connected with the double-airflow micro powder screening machine, so that the screening efficiency is improved, and the maximum particle size of a finished product is effectively controlled; thereby the screening work of the submicron powder with more than 500 meshes can be industrially produced on a large scale.

Description

Traditional Chinese medicine ultrafine powder sieve linkage system

technical field

The invention relates to a traditional Chinese medicine fine powder sieving system, in particular to a traditional Chinese medicine superfine powder sieve linkage system.

Background technique

Traditional Chinese medicine ultrafine pulverization technology refers to the process of crushing the Chinese medicine powder with a diameter of more than 3mm to 10-15μm by mechanical or hydrodynamic means for the purpose of breaking the cell wall of the plant medicinal material (the cell wall breaking of the general medicinal material under this particle size condition rate greater than 95%). Its working principle generally includes impact, collision, friction, shearing, grinding and simultaneous fracture of traditional Chinese medicine powder. At present, mechanical pulverization and airflow sieving classification are commonly used in the preparation of traditional Chinese medicine ultrafine powder. Because traditional Chinese medicine has special requirements on the drug and the part where it is used, the current commonly used air-feeding direct pulverization method is easy to separate the components of the traditional Chinese medicine, which cannot meet the quality requirements of the product. The airflow sieving classification method is a new type of classification method. The biggest advantage of the airflow sieving machine is to use the airflow carrying the powder to impact through the screen for effective separation, but for some micron-sized materials with light weight and small particle size Sometimes it will accumulate on the sieve to form agglomerates, which will cause the sieve to be blocked, resulting in the failure of the sieving work, which greatly affects the sieving efficiency and cannot meet the needs of large-scale industrial production. Although multi-stage ultra-fine classification technology is currently an effective method to achieve fine powder classification and reduce energy consumption, the equipment occupies a lot of space and personnel investment, and is not suitable for continuous large-scale production.

Contents of the invention

The object of the present invention is to provide a traditional Chinese medicine superfine powder that can be directly operated at normal temperature, has the exact maximum particle size of the superfine powder, has a simple manufacturing process, is suitable for crushing single or mixed medicinal materials rich in cellulose, and is suitable for large-scale industrial production. Micro powder powder sieve linkage system.

To achieve the above object, the present invention can take the following technical solutions:

The traditional Chinese medicine superfine powder sieve linkage system of the present invention includes a feeding device, a double-cylinder rod mill, a double-airflow fine powder sieve machine, two cyclone collectors, and a pulse dust collector; the feeding device includes a hopper, The outlet of the upper hopper is communicated with a cyclone collector through the feeder, and the outlet of the cyclone collector is communicated with the inlet of a powder mixer through the closed air feeder, and the powder is mixed The discharge port of the machine is connected with the feeding tank through the air-closed feeder; the discharge port of the double-cylinder rod mill is connected with the mixed powder feeding pipe of the dual-airflow micropowder sieve through an electronically controlled pneumatic valve; the dual-airflow fine powder The fine powder outlet of the sieve machine is connected with another cyclone collector, and the outlet of the cyclone collector is connected with the inlet of another powder mixer through the closed air feeder; the first cyclone collector The top of the pulse dust collector is connected to the air inlet of the pulse dust collector through a pipe; the air outlet of the pulse dust collector is connected to the air inlet of the induced draft fan, and the ash hopper outlet of the pulse dust collector is mixed with the second powder through the closed air feeder The machine is connected, and a closed-air feeder is installed at the outlet of the second powder mixer; a feeder is provided at the outlet of the upper tank, and one outlet of the feeder is respectively passed The controlled pneumatic valve is connected with the feed port of the double-cylinder rod mill, and the other discharge port of the feeder is connected with the air outlet of the vortex air pump through the electronically controlled pneumatic valve and the air filter; The pneumatic valve and the feeder installed at the discharge port of the hopper communicate with the first cyclone collector.

The powder mixer is a double-helix vertical mixer.

The dual-air flow micropowder sieve machine includes a casing and a sieve cylinder with an opening downwards arranged in the inner cavity of the casing, and the mouth of the sieve cylinder is connected with the upper opening of the funnel arranged at the lower part of the casing; the casing ) on the top is provided with a fine powder outlet connected to the inlet of the second cyclone collector; in the area between the sieve drum and the casing), there are two vertically intersecting tubes consisting of horizontal tubes and vertical tubes. The door-shaped rotating air jet pipe, the middle part of the horizontal pipe is connected with the drive motor; a blast pipe is vertically arranged in the middle of the screen drum, and the air outlet of the blast pipe passes through the screen drum and connects with the middle part of the horizontal pipe of the door-shaped rotating air jet pipe It passes through and is rollingly connected with the horizontal tube of the door-shaped rotating air jet tube through rolling bearings; the air inlet of the blast tube extends beyond the side wall of the funnel and communicates with the blast port of the peripheral blower; a mixed powder feeding tube is arranged in the screen drum , a buffer umbrella is arranged above the discharge port of the mixed powder feed pipe, and the feed port of the mixed powder feed pipe extends out of the side wall of the funnel to connect with the discharge port of the double-cylinder rod mill and the dust collection hood connected.

The air injection port of the door-shaped rotating air injection pipe is a through groove opened on the pipe wall along the axial direction of the horizontal pipe and the vertical pipe, and the notch of the through groove is opened toward the direction of the screen drum.

The air jets of the gate-shaped rotary air jet pipe are strip holes arranged at intervals along the axial direction of the horizontal tube and the vertical pipe on the pipe wall, and the openings of the strip holes are opened toward the direction of the screen drum. .

The present invention has the advantage that it is suitable for the crushing of single or mixed medicinal materials rich in cellulose, and the double-cylinder rod mill is connected with the double-airflow micro-powder screening machine, which improves the screening efficiency and effectively controls the maximum particle size of the finished product; The two-cyclone collector is connected with the pulse dust collector to prevent dust from polluting the environment and reduce the loss of traditional Chinese medicine fine powder; the pulse dust collector is connected to the induced draft fan to keep the entire production system in a negative pressure environment, and the fan airflow is used to guide the material to sieve during work. , At the same time, it has an air-drying effect on the material, without additional drying equipment, saving energy, and is suitable for large-scale industrial production. Before and after the crushing of medicinal materials, a double-helix vertical mixer is used to prevent the separation of traditional Chinese medicine components.

The remarkable progress that the present invention possesses is mainly reflected in the following aspects:

1. The powder sieving process adopts the combination of airflow classification and screen classification at the same time. Through the door-shaped rotating air jet pipe arranged outside the screen cylinder, a uniform airflow blowing into the screen cylinder is generated on the outer peripheral surface of the screen cylinder to prevent It prevents the micron-sized materials with light weight and small particle size from accumulating on the screen to form agglomerates, which leads to the occurrence of screen blockage, and greatly improves the classification efficiency of powder; Powder particle size ≤ 25 microns) provides a technical guarantee, which enables large-scale industrial production of the sieving of superfine powders with a mesh size of 500 or more.

2. Due to the structural design of the dual-air flow micropowder sieve machine of the present invention, the sieve cylinder structure can be selected for the screening parts, and under the condition that the volume of the sieving equipment is constant, the sieving area of the sieve cylinder is larger than that of the sieve plate. Improved screening efficiency.

3. The double-airflow micropowder sieve machine of the present invention adopts the airflow of the induced draft fan to guide the material to sieve, so that the air-drying effect is produced on the material while sieving, which saves peripheral drying equipment and reduces consumption.

4. The dual-air flow micropowder sieve machine of the present invention has simple structure, convenient replacement of the sieve cylinder, and easy repair and maintenance.

Description of drawings

Fig. 1 is a schematic diagram of the system structure of the present invention.

Fig. 2 is a schematic diagram of the structure of the dual-airflow fine powder sieve machine in Fig. 1 .

Detailed ways

As shown in Figures 1 and 2, the Chinese medicine superfine powder sieve linkage system of the present invention includes a feeding device, a double-cylinder rod mill 12, a double-airflow fine powder sieve machine 13, two cyclone collectors 7.1, 7.2, Pulse dust collector 14; the feeding device includes an upper hopper 5, and the outlet of the upper hopper 5 is communicated with a cyclone collector 7.1 through a feeder 6.1, and the outlet of the cyclone collector 7.1 is closed by air The feeder 8.1 communicates with a feed port of a double-helix vertical mixer 10.1, and the discharge port of the double-helix vertical mixer 10.1 communicates with the feeding tank 11 through the air-closed feeder 8.2; the double-cylinder rod mill The two outlets of the machine 12 are communicated with the mixed powder feeding pipe 22 of the double-airflow micro-powder sieve machine 13 through two electrically controlled pneumatic valves 3.3, 3.4; A cyclone collector 7.2 is connected, and the outlet of the cyclone collector 7.2 is communicated with another double-screw vertical mixer 10.2 feed port through the closed air feeder 8.3; the top of the second cyclone collector 7.2 The air inlet of the pulse dust collector 14 is connected through the pipeline; the air outlet of the pulse dust collector 14 is connected with the air inlet of the induced draft fan 15, and the ash hopper outlet of the pulse dust collector 14 is connected to the second double helix through the closed air feeder 8.5. The vertical mixer 10.2 is connected, and a closed air feeder 8.4 is installed at the second double-helix vertical mixer 10.2 outlet; a feeder 6.2 is arranged at the outlet of the upper tank 11, and the upper One discharge port of the feeder 6.2 is connected to the feed port of the double-cylinder rod mill 12 through two electro-pneumatic valves 3.5 and 3.6 respectively, and the other discharge port of the feeder 6.2 passes through the electro-pneumatic valve 3.2 and air filter The device 2 communicates with the air outlet of the vortex air pump 1; the air outlet of the air filter 2 communicates with the first cyclone collector 7.1 through the electro-pneumatic valve 3.1 and the feeder 6.1 installed at the outlet of the upper hopper 5.

The dual-air flow micropowder sieve machine 13 includes a casing 16 and a sieve cylinder 17 that is arranged in the inner cavity of the casing 16 and has a downward opening. The upper openings are connected; the top of the casing 16 is provided with a fine powder outlet connected to the second cyclone collector 7.2 feed port; Two door-shaped rotating air jet pipes composed of horizontal pipes 19 and standpipes 20, the middle part of the cross connection of the two horizontal pipes 19 is connected with the drive motor 9.2; a blast pipe 21 is vertically arranged in the middle of the screen drum 17, and the blast pipe The air outlet of 21 passes through the screen drum 17 and communicates with the middle part of the horizontal pipe 19 of the two-shaped rotating air jet pipe and is rollingly connected with the horizontal pipe 19 of the two-shaped rotating air jet pipe through rolling bearings; the air inlet of the blast pipe 21 extends out of the funnel The outside of the 18 side walls is connected with an external blower or an air source; a mixed powder feed pipe 22 is arranged in the sieve drum 17, and a buffer umbrella 23 is arranged above the discharge port of the mixed powder feed pipe 22, and the mixing The feed port of the powder feed pipe 22 extends out of the side wall of the funnel 18 and communicates with the double-cylinder rod mill 12 and the discharge port of the dust collecting hood 4 . The air injection port of the door-shaped rotating air injection pipe is a through groove opened on the pipe wall along the horizontal pipe 19 and the vertical pipe 20 axially. Between 0.5-2mm.

The working principle of the present invention is as follows:

As shown in Figures 1 and 2, when the medicinal material is fed, the electro-pneumatic valve 3.1 is in an open state, and the electro-pneumatic valve 3.2 is in a closed state. The coarsely crushed Chinese herbal medicine powder passes through the upper hopper 5, and is fed into the first cyclone collector 7.1 by the feeder 6.1 by the wind force from the vortex air pump 1 purified by the air filter 2, and passed through the closed air The feeder 8.1 enters the first double-helix vertical mixer 10.1. When the feed volume reaches 80% of the inner cavity of the double-helix vertical mixer 10.1, the gear motor 9.1 of the double-helix vertical mixer 10.1 starts to drive the double-helix Work, mix the feed material evenly; the powder after mixing evenly enters the feeding tank 11 through the air-closed feeder 8.2, and completes the feeding process.

During fine crushing, the electro-pneumatic valve 3.1 is in the closed state, and the electro-pneumatic valve 3.2 is in the open state. The evenly mixed powder in the feeding tank 11 enters the two cylinders of the double-cylinder rod mill 12 through the air-closed feeder 6.2 alternately through the electric control pneumatic valve 3.5 and the electric control air control valve 3.6, and the rod mill crushing process Among them, the opening and closing states of the electropneumatic valve 3.5, 3.4, 3.6 and 3.3 are correspondingly controlled by the automatic control panel.

Screening and collection of superfine powder materials: the mixed powder pulverized by the double-cylinder rod mill 12 enters the double-air flow sieve machine 13 for grading and sieving, and the fine powder passing through the 500-mesh sieve drum 17 is collected by the second cyclone cyclone. The device 7.2 enters the second double-helix vertical mixer 10.2. When the feed volume reaches 80% of its inner cavity, the deceleration motor 9.3 of the double-helix vertical mixer 10.2 starts to drive the double-helix to work, and the graded The ultrafine powder is mixed evenly, and the finished product after mixing is collected from the discharge port through the closed air feeder 8.4.

Dust removal treatment: the external spray fine powder produced when feeding into the upper hopper 5 is collected by the dust collection cover 4 and enters the screen drum 17 through the pipeline for screening, and then enters the second double helix through the second cyclone collector 7.2 Inside the vertical mixer 10.2. When the second cyclone collector 7.2 collects ultrafine powder, due to the effect of air flow, fine powder is also mixed in the air, and the fine powder mixed in the air enters the pulse dust collector 14 along the pipeline, and passes through the closed air feeder. 8.5 also enters into the second double-helix vertical mixer 10.2, which not only plays the role of dust removal but also saves Chinese medicinal materials.

The induced draft fan 15 is always in working condition throughout the preparation process of the superfine powder of Chinese herbal medicines to maintain the negative pressure environment of the whole production system, and at the same time, it can produce an air-drying effect on the materials, so no additional drying equipment is needed, saving energy and reducing consumption.

The double-airflow micropowder sieve machine 13 of the present invention greatly improves the screening efficiency, solves the problem of sieve blockage of the sieve cylinder, and can precisely control the maximum particle size of the finished product, thereby realizing the ultrafine powder of Chinese medicinal materials (powder particle size ≤25 microns) large-scale industrial production.

The working principle of the dual-airflow micro-powder sieve machine 13 is as follows:

As shown in Figure 2, during work, the mixed powder pulverized from the twin-cylinder rod mill 12 enters the inside of the sieve cylinder 17 under the action of wind force, and the impact force is reduced by the buffer umbrella 23, so that the mixed powder is crushed in the sieve cylinder 17. Internal dispersion, the sieve cylinder 17 is a 500 mesh screen; the powder dispersed in the sieve cylinder 17 is classified through the sieve cylinder 17 under the action of induced wind, and the superfine powder passing through the sieve cylinder 17 enters the first stage from the top under the action of negative pressure. In the two cyclone cyclone collectors 7.2, the powder that does not pass through the sieve cylinder 17 sinks and is collected through the outlet of the funnel 18, and then enters the double-cylinder rod mill 12 for crushing; the gate-shaped rotating air jet pipe rotates under the drive of the drive motor 9.2 , the pressure air generated by the external blower or air source enters the horizontal pipe 19 and the vertical pipe 20 from the blowing pipe 21, and is ejected through the air injection port with a through-slot structure, forming a uniform direction on the top surface and side of the screen cylinder 17. The back-blowing airflow in 17 further atomizes the powder in the sieve cylinder 17, and at the same time prevents the powder from agglomerating on the sieve cylinder 17 to block the screen holes, so that the powder that does not pass through the sieve cylinder 17 is vortexed with the formed airflow Sink into the funnel 18 to discharge and collect; the distance between the horizontal pipe 19 and the vertical pipe 20 and the corresponding top wall and side wall of the screen drum 17 is 25 mm.

Claims (5)

1. A Chinese medicine superfine powder sieve linkage system, including a feeding device, a double-cylinder rod mill (12), a double-airflow fine powder sieve (13), a cyclone collector (7.1, 7.2), a pulse dust collector (14 ); it is characterized in that: the feeding device includes a hopper (5), the outlet of the hopper (5) communicates with the cyclone collector (7.1) through the feeder (6.1), and the cyclone collector The discharge port of the device (7.1) is connected to the feed port of the powder mixer (10.1) through the air-closed feeder (8.1), and the discharge port of the powder mixer (10.1) is passed through the closed-air feeder (8.2) It communicates with the feeding tank (11); the outlet of the double-cylinder rod mill (12) passes through the electric control pneumatic valve (3.3, 3.4) and the mixed powder feeding pipe ( 22) connected; the fine powder outlet of the double-airflow micropowder sieve machine (13) is connected to the cyclone collector (7.2), and the outlet of the cyclone collector (7.2) is connected to the air-closed feeder (8.3) The feed port of the powder mixer (10.2) is connected; the top of the cyclone collector (7.2) is connected to the air inlet of the pulse dust collector (14) through a pipe; the air outlet of the pulse dust collector (14) is connected to the induced draft fan ( 15) The air inlet is connected, the outlet of the ash hopper of the pulse dust collector (14) is connected with the powder mixer (10.2) through the closed air feeder (8.5), and a closed air is installed at the outlet of the powder mixer (10.2). A feeder (8.4); a feeder (6.2) is provided at the discharge port of the feed tank (11), and one discharge port of the feeder (6.2) passes through the electric control pneumatic valve (3.5, 3.6) It is connected with the feed port of the double-cylinder rod mill (12), and the other discharge port of the feeder (6.2) passes through the electro-pneumatic valve (3.2) and the air filter (2) and the vortex air pump (1) The air outlet is connected; the air outlet of the air filter (2) communicates with the cyclone collector (7.1) through the electro-pneumatic valve (3.1) and the feeder (6.1) installed at the outlet of the upper hopper (5). 2. The traditional Chinese medicine superfine powder sieve linkage system according to claim 1, characterized in that: said powder mixers (10.1, 10.2) are double-helix vertical mixers respectively. 3. The traditional Chinese medicine superfine powder sieve linkage system according to claim 1, characterized in that: the dual-airflow fine powder sieve machine (13) includes a casing (16) and is arranged in the inner cavity of the casing (16). The opening of the screen drum (17) is downward, and the mouth of the screen drum (17) is connected with the upper opening of the funnel (18) arranged at the lower part of the casing (16); the top of the casing (16) is provided with a cyclone The fine powder discharge port connected to the feed port of the collector (7.2); in the area between the sieve cylinder (17) and the casing (16), there are two cross tubes (19) and vertical tubes arranged perpendicularly to each other. The door-shaped rotating air jet tube formed by the tube (20), the middle part of the horizontal tube (19) is connected with the drive motor (9.2) in transmission; the blast tube (21) is vertically arranged in the middle of the screen drum (17), and the blast tube ( The air outlet of 21) passes through the screen cylinder (17) and communicates with the middle part of the horizontal tube (19) of the door-shaped rotating air jet pipe and is rollingly connected with the horizontal tube (19) of the door-shaped rotating air jet pipe through rolling bearings; the blast pipe (21 The air inlet of the ) extends out of the side wall of the funnel (18) and communicates with the air outlet of the peripheral blower; a mixed powder feed pipe (22) is arranged in the sieve cylinder (17), and the mixed powder feed pipe A buffer umbrella (23) is arranged above the discharge port of (22), and the feed port of the mixed powder feed pipe (22) extends out of the side wall of the funnel (18) to connect with the double-cylinder rod mill (12) and The discharge port of the dust collection cover (4) is connected. 4. The traditional Chinese medicine superfine powder sieve linkage system according to claim 3, characterized in that: the air injection port of the door-shaped rotating air injection pipe is set in the axial direction of the horizontal pipe (19) and the vertical pipe (20). The through groove on the pipe wall, the notch of the through groove is opened towards the direction of the screen drum (17). 5. The traditional Chinese medicine superfine powder sieve linkage system according to claim 3, characterized in that: the air injection ports of the door-shaped rotating air injection pipe are arranged at intervals along the axial direction of the horizontal pipe (19) and the vertical pipe (20) A strip-shaped hole is provided on the pipe wall, and the opening of the strip-shaped hole is opened toward the direction of the screen drum (17).

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