Secondary dust removal and koji suction system
By combining a rotating partition to separate the dust collection chamber with a cyclone separator and a pulse dust collector, the problem of microbial spore release in the traditional koji-making process is solved, achieving efficient spore removal and maintaining the purity of the koji, and improving operational safety and automation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-03-03
AI Technical Summary
Traditional koji-making processes involve high labor intensity and low efficiency during the transfer of koji, and the release of microbial spores into the air can harm the health of operators.
The dust collection chamber is separated by a rotating partition, and a cyclone separator and a pulse dust collector are used for dual separation. Water is sprayed to treat the spore aggregates, reduce their dryness to prevent them from being released, and protect the health of the operators.
It effectively reduced the spread of microbial spores in the workshop, improved operational safety and the purity of the koji, and achieved process automation.
Smart Images
Figure CN223959827U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of food production, specifically a secondary dust removal and suction system. Background Technology
[0002] In the traditional brewing industry, koji making is a core process, and its technical level directly determines the fermentation quality and product flavor stability. Currently, mainstream koji making processes still rely on low-mechanization methods, especially in the koji transfer process, which often involves manual loading or mechanical digging. This is labor-intensive, inefficient, and dependent on manual control, making automation difficult. Furthermore, the digging process releases a large number of fermentation microbial spores into the air. To improve this, koji making processes have begun to incorporate a koji-spore separation and recovery process, using specific separation methods to separate microbial spores from the koji, increasing the purity of the koji. However, even with this spore separation and recovery process, spores inevitably remain in the air during the final cleaning of the separated spore aggregates. Inhaling these spores can potentially cause health problems for operators, endangering their health and safety. Utility Model Content
[0003] The purpose of this invention is to provide a secondary dust removal and suction system to solve the problems mentioned in the background art.
[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:
[0005] A secondary dust collection system includes a dispensing tank with a sealing cover at the top and a discharge port at the bottom, connected to a discharge mechanism. The sealing cover has a pipe connection port, and the dispensing tank is connected to a dust collection mechanism via the pipe connection port and a pipe. A dust collection fan is connected to the dust collection mechanism, and a dust discharge port is located at the bottom of the dust collection mechanism, connected to a dust collection mechanism. The dust collection mechanism includes a dust collection chamber, with a pair of opposing inner walls each fixed with a rotary motor. The rotary motor shafts are horizontally distributed and fixedly connected to rotating baffles. In the initial state, the rotating baffles on both sides divide the inner cavity of the dust collection chamber into an upper dust storage chamber and a lower dust deposition chamber. The dust storage chamber is connected to the dust discharge port. Several water spray nozzles are provided on the side wall of the dust deposition chamber, and a sealed door is opened on the side wall of the dust collection chamber at the location of the dust deposition chamber.
[0006] In a further embodiment, the dust removal mechanism is a cyclone separator or a pulse dust collector, or a pulse dust collector and a cyclone separator connected to each other by a pipeline.
[0007] In a further embodiment, the dust extraction fan is connected to an air outlet pipe, which is connected to a material discharge mechanism.
[0008] Preferably, the conveying assembly is a star-shaped unloader.
[0009] Preferably, the dust extraction fan is a Roots blower.
[0010] Compared with the prior art, the beneficial effects of this utility model are:
[0011] I. In this utility model, the dust collection chamber where the spore aggregates after final separation are located is redesigned. A rotating baffle is used to divide the space inside the chamber, and water is sprayed onto the spore aggregates located in the lower dust deposition chamber to reduce their dryness and make it less likely for them to release spores into the air. In addition, the rotating baffle can also prevent the lower moisture from entering other parts of the device, thus maintaining the dryness of other parts of the device.
[0012] Second, this utility model uses a cyclone separator and a pulse dust collector to perform dual separation of microbial spores in the koji, which minimizes the content of residual microbial spores in the koji. While maintaining the purity of the koji, the content of spores scattered in the workshop can be ignored, thus protecting the life and health of the workers in the workshop. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the internal structure of the dust collection chamber of this utility model.
[0015] In the diagram: 1. Feeding tank; 2. Sealing cover; 3. Dust extraction fan; 4. Dust collection bin; 5. Rotary motor; 6. Rotating baffle; 7. Dust storage chamber; 8. Dust deposition chamber; 9. Water spray nozzle; 10. Sealed door; 11. Cyclone separator; 12. Pulse dust collector; 13. Rotary rotary valve; 14. Air outlet duct. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] Implementation, for example Figure 1-2As shown, this embodiment provides a secondary dust removal and suction system, including a dispensing tank 1. The dispensing tank 1 has a sealing cover 2 at its top and a discharge port at its bottom, connected to a discharge mechanism. The sealing cover 2 has a pipe connection port, through which the dispensing tank 1 is connected to a dust removal mechanism. A dust collection fan 3 is connected to the dust removal mechanism, and a dust discharge port is located at the bottom of the dust removal mechanism, connected to a dust collection mechanism. The dust collection mechanism includes a dust collection chamber 4. Rotary motors 5 are fixed on the inner walls of the dust collection chamber 4, which are opposite to each other. The rotating shafts of the motors 5 are horizontally distributed and fixedly connected to rotating baffles 6. In the initial state, the rotating baffles 6 on both sides divide the inner cavity of the dust collection chamber 4 into an upper dust storage chamber 7 and a lower dust deposition chamber 8. The dust storage chamber 7 is connected to the dust discharge outlet. Several water spray nozzles 9 are provided on the side wall of the dust deposition chamber 8. A sealed door 10 is opened on the side wall of the dust collection chamber 4 at the position of the dust deposition chamber 8. In this embodiment, the dust collection chamber 4 where the spore aggregates are finally separated is redesigned. The rotating baffles 6 are used to divide the space inside the chamber. The spore aggregates located in the lower dust deposition chamber 8 are sprayed with water to reduce their dryness and make it less likely for them to release spores into the air. In addition, the rotating baffles 6 can also prevent the lower moisture from entering other parts of the device and keep other parts of the device dry.
[0018] The dust removal mechanism includes a cyclone separator 11, a pulse dust collector 12, or a pulse dust collector 12 and a cyclone separator 11 connected to each other via pipelines. In this embodiment, a cyclone separator 11 and a pulse dust collector 12 can be used to perform dual separation of microbial spores in the koji, minimizing the content of residual microbial spores in the koji. While maintaining the purity of the koji, the content of spores scattered in the workshop is negligible, protecting the health and safety of the workers in the workshop. Among them, the cyclone separator 11 and the pulse dust collector 12 are both known and mature technologies. The working principle of the cyclone separator 11 is based on the rotational motion caused by the tangential introduction of airflow, which causes solid particles with large inertial centrifugal force to be thrown towards the outer wall surface and separated. Its main features are simple structure, large operational flexibility, high efficiency, convenient management and maintenance, and low price. It is used to collect dust with a diameter of 5 to 10 μm or larger and is a widely used separation device in industry. The working principle of the pulse dust collector 12 is to remove the dust attached to the filter medium (bag or filter cartridge) by blowing compressed air. Depending on the size of the dust collector, there may be several sets of pulse valves, which are controlled by a pulse controller or PLC. Each time, a set of pulse valves is opened to remove the dust from the part of the bag or filter cartridge it controls, while the other bags or filter cartridges work normally. After a period of time, the next set of pulse valves opens to clean the next part. The dust collector is composed of a ash hopper, upper chamber, middle chamber, and lower chamber. The upper, middle and lower chambers are compartmentalized. During operation, dust-laden gas enters the ash hopper through the inlet duct. Coarse dust particles fall directly to the bottom of the ash hopper, while fine dust particles are carried upwards by the airflow into the middle and lower chambers. Dust accumulates on the outer surface of the filter bags. The filtered gas enters the upper chamber and then the clean air collection pipe-exhaust duct, and is discharged to the atmosphere by the exhaust fan. The cleaning process first involves shutting off the clean air outlet duct of the chamber, ensuring that the filter bags in that chamber are in a state of no airflow (compartmental shutdown cleaning). Then, the pulse valve is opened to perform pulse jet cleaning with compressed air. The shut-off valve closing time is sufficient to ensure that the dust detached from the filter bags settles into the ash hopper after the pulse jet, preventing the dust from re-attaching to the surface of adjacent filter bags after detaching from the filter bag surface. This ensures thorough cleaning of the filter bags. The exhaust valve, pulse valve, and ash discharge valve are fully automatically controlled by a programmable logic controller (PLC). Dust-laden gas enters through the inlet, and as it passes through the ash hopper, some large dust particles are separated by inertia and gravity, falling directly to the bottom of the ash hopper. Dust-laden gas enters the filter bag filtration area of the middle chamber after passing through the dust hopper. The gas passes through the filter bags, and the dust is trapped on the outer surface of the filter bags. The purified gas enters the upper chamber through the filter bag openings and is then discharged from the outlet.
[0019] The conveying component is a rotary valve 13. The rotary valve 13 is a known mature technology and is a special unloading device. It is mainly used at the discharge port that operates under negative pressure. It conveys materials through a rotating impeller and plays a sealing role to prevent air from being sucked in from the discharge port during the conveying process, thus ensuring the normal discharge of the valve.
[0020] The dust extraction fan 3 is connected to an air outlet pipe 14, which is connected to the discharge mechanism, i.e., the star-shaped unloader 13. The dust extraction fan 3 is a Roots blower. The Roots blower is a known mature technology and belongs to the positive displacement blower category. It is a rotary compressor that uses two lobe-shaped rotors to compress and transport gas by means of relative motion within a cylinder. This type of blower has a simple structure, is easy to manufacture, and is widely used in aquaculture oxygenation, sewage treatment aeration, and cement conveying. It is also more suitable for gas conveying and pressurization systems in low-pressure applications and can also be used as a vacuum pump, etc.
[0021] In use, open the sealing cover 2 and add the fermented koji containing mixed fermentation microbial spores into the dispensing tank 1. Then turn on the vacuum fan 3 and the rotary valve 13. The vacuum fan 3 draws the microbial spores in the dispensing tank 1 into the cyclone separator 11 and the pulse dust collector 12 through the pipe, thereby purifying the koji. The purified koji is then transported by the rotary valve 13 to other processing steps for subsequent operations. During the transport process, the exhaust pipe 14 on the vacuum fan 3 provides further power to the rotary valve 13, enabling the unloading process to proceed smoothly. The microbial spores deposited in the cyclone separator 11 and pulse dust collector 12 are discharged into the dust storage chamber 7 in the dust collection chamber 4 through their dust discharge outlets. When the microbial spores on the rotating baffles 6 on both sides reach a certain weight, the rotating motor 5 drives the rotating baffles 6 on both sides to rotate downwards at a certain angle, causing the microbial spores to fall into the dust deposition chamber 8. Of course, the rotating motor 5 can also be set to rotate at a fixed angle at the same interval to achieve the same effect. After the microbial spores fall into the dust deposition chamber 8, the rotating motor 5 drives the rotating baffles 6 to return to their initial position, dividing the dust collection chamber 4 into the dust storage chamber 7 and the dust deposition chamber 8. At this time, the water spray nozzle 9 sprays water onto the microbial spore pile in the dust deposition chamber 8 to moisten it and prevent it from drifting into the air, so that when the staff opens the sealed door 10 for cleaning, they will not inhale the microbial spores scattered in the air.
[0022] In this embodiment, the pulse dust collector is model DMC48, DMC80 or DMC120, the cyclone separator is model JPZQFL-1500, JPZQFL-1800 or JPZQFL-2500, the rotary valve is model YJD-8, YJD-HX-26A or YJD16, and the Roots blower is model XG-350.
[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A secondary dust removal and suction system, characterized in that: The device includes a material distribution tank (1), a sealing cover (2) on the top of the material distribution tank (1), a discharge port at the bottom of the material distribution tank (1), and a discharge mechanism connected to the discharge port; a pipe connection port is provided on the sealing cover (2), and a dust removal mechanism is connected to the material distribution tank (1) through the pipe connection port and the pipe; a dust suction fan (3) is connected to the dust removal mechanism; a dust discharge port is provided at the bottom of the dust removal mechanism, and a dust collection mechanism is connected to the dust discharge port; The dust collection mechanism includes a dust collection chamber (4). A rotary motor (5) is fixed on a pair of inner walls opposite each other in the dust collection chamber (4). The rotating shafts of the rotary motors (5) are horizontally distributed and a rotating partition (6) is fixedly connected to the rotating shaft. In the initial state, the rotating partitions (6) on both sides divide the inner cavity of the dust collection chamber (4) into an upper dust storage chamber (7) and a lower dust deposition chamber (8). The dust storage chamber (7) is connected to the dust discharge outlet. Several water spray nozzles (9) are provided on the side wall of the dust deposition chamber (8). A sealed door (10) is opened on the side wall of the dust collection chamber (4) at the position of the dust deposition chamber (8).
2. The secondary dust removal and suction system according to claim 1, characterized in that: The dust extraction fan (3) is connected to an air outlet pipe (14), which is connected to the material discharge mechanism.
3. The secondary dust removal and suction system according to claim 2, characterized in that: The discharge mechanism is a star-shaped unloader (13).
4. The secondary dust removal and suction system according to claim 1, characterized in that: The dust removal mechanism is a cyclone separator (11).
5. The secondary dust removal and suction system according to claim 1, characterized in that: The dust removal mechanism is a pulse dust collector (12).
6. The secondary dust removal and suction system according to claim 1, characterized in that: The dust removal mechanism consists of a pulse dust collector (12) and a cyclone separator (11) that are connected to each other by pipes.
7. The secondary dust removal and suction system according to claim 1, characterized in that: The dust extraction fan (3) is a Roots blower.