KR20120119702A - Dust collecting system - Google Patents

Abstract

PURPOSE: A dust collecting system is provided to increase energy consumption efficiency by filtering polluted air at low air blowing pressures. CONSTITUTION: A dust collecting system includes one or more polluted air inlets(4), a polluted air collecting part(3), a plurality of bag filters(2), a filtering cleaning unit, a collecting chamber(1), and a dust discharging unit. The polluted air collecting part collects polluted air through the inlets and filters the polluted air through the bag filters. The bag filters are installed at the polluted air collecting part and purifies the polluted air. The filter cleaning unit is installed at the lateral sides of the bag filter to remove dust from the bag filters. The collecting chamber is arranged under the bag filters to collect removed dust.

Description

Dust Collecting System

This technology relates to a dust collection system. More specifically, the present invention relates to a dust collection system that collects a large amount of low concentration dust generated at a grain processing facility such as a rice grain processing plant and a dry storage facility at low cost.

Industrial dust collection system is used as a means for purifying the air by removing dust contained in the air in various plants such as steel mills, timber factories, incineration plants and rice processing plants, subways and the like. The basic structure of the dust collecting system is composed of contaminated air inlet, purifying unit and purifying air discharge unit. The purifying unit is for the function of removing or collecting fine dust contained in the contaminated air by physical, chemical or electrical methods. In the dust collecting system, the purifying unit is a key component of the dust collecting apparatus, and the operation method of the purifying unit such as cyclone, bag filter, turbo cleaner, and screwer, which will be described later, should be determined according to the location and purpose of using the dust collecting system. Determination of the purification unit is a very important part for cost reduction through dust collection efficiency and energy saving.

In general, in the Rice Processing Complex (RPC) and Drying and Storage Center (DSC), the dust collection system is a shipbuilding machine that selects by-products or foreign substances by using airflow, wind turbine, dryer, rice milling system, general refiner In addition to affecting the performance of major unit machines such as rice, chaff, and stoneware, they are installed in almost all facilities of the Migok general treatment plant and dry storage facilities such as input ports, each unit machine, brown rice and white rice tanks, transfer facilities, and auxiliary tanks. It is a very important part that directly affects the quality of rice such as drying, surface cracking and water immersion rate.

As a result, dry storage facilities with a dry storage capacity of 800-1,000 tons are subjected to dust collection at an average of about 780 ㎥ / min at raw material inlets, wind turbines, shipbuilding machines, transfer facilities, and circulation dryers. However, the square bin is not able to carry out dust collection at all. In addition, the processing facilities of the rice grain processing plant with 10 tons / hour of white rice processing capacity averagely about 3,520 ㎥ / min at the raw material input port, the comprehensive selection machine, rice hull bran, brown rice crusher, brown rice part, rice milling machine, white rice part and packing part. Enormous dust collection is required.

The dust collection system takes about 232.3 kW, which is about 28.7% of the total power of the rice plant, excluding the energy required for major unit machines such as the rice milling system. It is around 10.8%. In addition, an enormous cost is paid every year for the maintenance of the dust collection system.

Currently, the dust collection system used in Korea's Migok general treatment plant and dry storage facility includes centrifugal cyclone and turbo cleaner, bag filter as filter dust collector, and other simple dust collector. In addition, there is a general scrubber (Scrubber), but it is mainly used for the removal of polluting gas in Korea, but is not used in the Migok General Treatment Plant due to problems such as waste water treatment.

The dust concentration standard of cyclone or bag filter outlet, which is generally used in MIC and dry storage facilities, is below 100 mg / ㎥, and the dust concentration standard is 0.5 mg / when measured near the boundary of MIC and dry storage facilities. Less than ㎥ (Air Quality Preservation Act and Industrial Safety and Health Act). However, a large number of cyclones and bag filters are installed in the Migok General Treatment Plant and the dry storage facility, and the installation location is mostly at the boundary of the site of the Migok General Treatment Plant and the dry storage facility. Therefore, even if the dust concentration at the exit of the cyclone or bag filter satisfies the threshold, the fugitive dust concentration measured near the boundary of Migok Complex and the dry storage facility is very likely to fall below the threshold.

As a result of measuring the dust concentration in the dry storage facility installed in MIC, the dust concentration in facility A was 1.22-22.89 mg / m³ and averaged about 6.97 mg / m³. In addition, the dust concentration in facility B is 1.44-20.22 mg / m³, which is an average of 8.41 mg / m³, below the worker's exposure standard of 4.0 mg / m³ (Ministry of Labor Notice 2011-13, Exposure Standards for Chemicals and Physical Factors, Due to the higher level of grain dust, dust collection was not carried out efficiently, and it was necessary to supplement the dust collection facilities. In addition, the dust concentration near the border of Migok General Treatment Plant is 9.11 mg / m³ for facility A and 14.00 mg / m³ for facility B, which is much higher than 0.50 mg / m³, the dust dust standard under the Air Quality Preservation Act. Therefore, it is absolutely necessary to improve the dust equipment in the import, drying, storage and processing facilities of the Migok General Treatment Plant and the dry storage facility.

As complaints are constantly raised due to the dust of residents near Migok General Treatment Plant and Dry Storage Facility, investment in dust collection system has been recently increased by installing expensive bag filters at Migok General Treatment Plant and Dry Storage Facility. However, due to the difficulty of systematic design and effective installation, complaints caused by poor dust collection, low working environment and poor performance of unit machines are still a problem, causing excessive energy consumption and enormous installation costs. In addition, the dust collection system attached to the process of processing high moisture content grains, such as rice, which has a water content of 24%, significantly reduces the durability of the bag filter due to the high water content, and pays the maintenance cost required to replace the bag filter almost every year. The dust collector should be urgently improved at the MIC and dry storage facilities.

Cyclone, a centrifugal dust collection facility, has been introduced to the main grain collection facilities of the Migok General Treatment Plant and the dry storage facility at the beginning of the distribution of the Migok General Treatment Plant, but the low dust collection efficiency can be seen even when the air pollutant removal efficiency standard is only 60%. While the use is gradually limited while causing many complaints caused by dust, the turbo cleaner, which has a structurally lower dust collection efficiency than the cyclone, is installed in a continuous dryer and a circulating dryer without any additional verification of dust removal efficiency. It is spreading.

The bag filter, which is a bag filter, is used to collect dust generated from rice, such as an input port, a shipbuilding machine, a wind separator, a general sorter, rice hulls, a brown rice erection, and a brown rice part, and a pulse for removing dust attached to the filter cloth. According to the method, low pressure exhaustion (0.4-0.5 kgf / cm 2) and high pressure exhaustion (Header, 5-6 kgf / cm 2) are classified. Low pressure dedusting method should install small high pressure ring blower separately due to low pressure, and high pressure dedusting method should install air compressor which can generate pressure of about 7 kgf / ㎠ due to high pressure. In addition, there is a drawback that the length of the bag filter can not be installed more than 2 ~ 3m for dust removal because the distance of the pulse is short. In the dust collector of shipbuilding, rice husks, and rice mills, which contain a large amount of foreign matter, a large amount of foreign matter is first removed by a cyclone and fine dust is removed by a bag filter. In addition, the bag filter method is too expensive (average of about 150,000 won / ㎥ / min, 80,000-400,000 won / ㎥ / min, blower, rotary valve, high-pressure blower or air compressor) or bag price of 6,000-9,000 The price of bag is less than 1% in the price of bag filter type dust collecting system, and the excessive blown air due to high blowing resistance (250-300 mmAq) Energy loss requires improvement.

In summary, the improved dust collection system to be used in MIC and dry storage facilities needs to be supplemented with the following points to save the installation cost and energy while increasing the dust collection efficiency: (a) It is reasonable to choose a bag filter type rather than a clone, turbo cleaner or scrubber type dust collection system. However, it is reasonable to combine cyclone and bag filter for dust collection in case of containing a large amount of foreign substances such as shipbuilding machine, rice hull ball, rice milling machine, etc. Making sense; (b) In the case of the bag filter method, it is necessary to adopt a design method that can reduce energy consumption by lowering high blowing resistance and exhibit high dust collection efficiency; (c) The bag filter dust removal device also needs to adopt a method that can lower energy consumption and make it economical than the conventional method; And (d) It is necessary to adopt a method to prevent the service life of the bag filter from shortening due to high moisture rice and rainy season moisture.

Numerous papers and patent documents are referenced and cited throughout this specification. The disclosures of the cited papers and patent documents are incorporated herein by reference in their entirety to better understand the state of the art to which the present invention pertains and the content of the present invention.

The present invention is to solve the above-mentioned problems, the existing bag filter dust collecting system used in the MIC and dry storage facility is too expensive equipment, the energy consumption in use is high in the MIC and the MIC. Its purpose is to provide a low-cost, high-efficiency dust collection system by improving structural problems that are difficult to install and manage, and shorten the useful life of the bag filter due to high moisture rice or summer moisture.

In addition, an object of the present invention is to provide a dust collecting system for collecting dust generated in a plurality of dust generating apparatus, such as a flat type silo or a square bin, which has not been dusted due to excessive dust collection while having a high dust concentration at low cost and high efficiency. have.

Accordingly, an object of the present invention is to provide a dust collecting system for a grain filter treatment plant and a dry storage facility of a bag filter type.

The inventors of the present invention through the research, the bag filter dust collection system used in the existing Migok comprehensive treatment plant and dry storage facility is primarily expensive equipment, high energy consumption in use, the difficulty of installation and management in the Migok comprehensive treatment plant and dry storage facility Many efforts have been made and research has been made to develop low-cost, high-efficiency dust collection systems by improving these structural problems. As a result, the consumption and pressure of dedusting air is proportional to the size and width of the nonwoven filter cloth, according to the working principle of the existing system.However, the surface area of the filter cloth has been limited to the method of increasing the number of filter cloths. The method improves the method, and the floor height of the facilities of the present rice processing plant and the dry storage facility is about 12m or more, so that the length and width of the bag filter are increased to increase the surface area, resulting in high energy consumption efficiency and dust collection. We found that the system construction cost is significantly reduced, and the period of water repellent effect is maintained even with the antistatic water repellent bag filter, so that the polluted air generated from the high moisture rice is collected or the relative humidity of outdoor air is high. In this case, the bag filter gets wet and dust remains on the bag filter even if a high pressure pulse is applied. It is not exhausted, and this increases not only the blowing resistance but also the efficiency of dust collection. Therefore, the bag filter needs to be replaced after a short period of use. Therefore, the bag filter is exposed to the outside air without being placed in a case. When the bag is dried by injecting to solve this problem, the present invention was found to be able to significantly increase the life of the bag than the conventional method to complete the present invention.

The present invention provides a bag filter dust collection system.

According to one aspect of the invention, the invention provides a dust collection system comprising: (a) a main inlet 4 for collecting at least one contaminated air per process; (b) a contaminated air collection station (3) capable of collecting contaminated air introduced from the inlet and filtering the contaminated air for each process through a bag filter (2); (c) a plurality of bag filters (2) installed in the polluted air collection station to purify the polluted air; (d) filter cleaning means for removing dust by applying a physical force to the bag filter (2); (e) a collecting chamber (1) provided below the bag filter (2) to collect and remove the dust removed; And (f) dust discharge means installed under the collection chamber; And (g) bag filter drying means used to dry the bag filter in order to prevent the bag filter from being wetted with water, thereby reducing dust collection efficiency and increasing blowing resistance.

The term 'dust collection system' in the present specification refers to a device for separating and collecting dust floating in the air or a device for sucking dust on the floor or an object.

The term “bag filter” in the present specification refers to a device for collecting fine dust powder mixed with gas through a bag or the like.

The term 'rice processing complex (RPC)' in the present specification refers to a place where rice is processed as it is, which is literally dried, stored, polished, packaged, and sold by farms.

As used herein, the term "drying and storage center (DSC)" refers to a facility that combines drying and storage of grain.

As used herein, the term 'check value' is a generic term for a valve that operates to prevent backflow by immediately closing the valve when fluid flows in only one direction and vice versa. The valve is opened and closed vertically, and when the fluid flows from the bottom up, the valve floats and is open.The swing check valve means the valve is opened and closed with the upper pin as a point. A ball check valve is a type of lift type used for hydraulic pressure.

As used herein, the term “vibration motor” refers to a component that converts electrical energy into mechanical vibration using the principle of generating electromagnetic force. Vibration motors have been common in the age of wireless pagers, and most of them are equipped with vibration motors on machine cases to feel vibration. The vibration motor is largely divided into a cylindrical type and a flat type, and the cylindrical type is further divided into a coreless type and a core type.

As used herein, the term “dust exhaust bar” refers to a component that facilitates dust cleaning by uniformly distributing vibration generated by the vibration motor to the bag filter.

According to a preferred embodiment of the present invention, the polluted air collection station (3) is provided with an inlet (4) for collecting and collecting polluted air generated in at least one process. The reason why the at least one contaminated air inlet 4 is provided is that dust or dust generated by each process can be collectively filtered in one dust collecting system.

According to a preferred embodiment of the present invention, a check value is provided at the drier polluted air inlet in order to prevent backflow of the incoming contaminated air. It is preferable to install a lift check valve, a swing check valve, and a ball check valve, but the check valve may be sensitive to a small pressure difference to prevent a back flow of contaminated gas. It is most desirable to install a valve.

According to a preferred embodiment of the present invention, the length of the bag filter 2 is very important for reducing the blowing pressure and facilitating dust exhaustion. The length of the bag filter is preferably 4,000 mm to 15,000 mm, more preferably 5,000 mm to 10,000 mm. The most preferable reason is 5,000mm to 10,000mm as the length of the bag filter 2 is a key technical feature of the present invention is to extend the bag filter length, increase the width and number of the bag filter is installed to contact the contaminated air Its large surface area reduces the air flow through the filter cloth from the current 4 ~ 6m / min to about 2m / min. In addition, it was necessary to identify the optimum filter length found through numerous experiments, and the optimum numerical range found after each effort was the above range.

According to a preferred embodiment of the present invention, the bag filter 2 is preferably 1 to 1000, but not limited thereto, in order to reduce the blowing pressure and facilitate dust removal, Depending on the size of the rice processing plants or dry grain storage facilities, those skilled in the art will be able to freely increase or decrease.

According to a preferred embodiment of the present invention, the size of the dust flowing into the bag filter 2 is 8-1000 μm, generally 8-120 μm, and the most specific size is 8-100 μm. The size (diameter, particle size) of dust by dust collection location investigated through the study to know the specific gravity of the size of the dust that did not pass through the filter cloth shows the distribution as shown in Tables 1 and 2 below, the average particle size of at least 8.35㎛ Is distributed about 10%.

Dust collection position Moisture content
(%) Weight Ratio by Particle Size (%) 2000
(Μm) 1000 850 500 300 180 150 106 75 45 45 ↓ Circulation Dryer 13.1 0.3 5.2 1.3 8.8 10.5 4.6 1.6 3.6 3.9 21.5 38.8 Inlet 10.5 0.2 0.2 0.3 0.6 1.0 0.7 0.5 2.1 2.8 38.4 53.2 Rice bran 14.0 0.0 3.2 2.6 25.5 53.4 14.4 0.7 0.0 0.1 0.0 0.0

Fine dust collected from the inlet Fine dust collected from the circulation dryer Average Standard Deviation Average Standard Deviation Diameter at 10% 8.35 0.01 10.45 0.01 Diameter at 50% 20.94 0.08 30.995 0.06 Diameter at 90% 43.07 0.09 99.05 0.86 Mean diameter 23.86 0.06 42.985 0.21

According to a preferred embodiment of the present invention, the bag filter 2 of the present invention is preferably moss processing, water repellent processing, oil repellent processing, acid / alkali processing, antistatic processing, flame retardant processing, acrylic / urethane foam coating, Teflon coating and Teflon membrane treatment, more preferably water repellent, oil repellent, acid / alkali, antistatic and flame retardant, and most preferably water repellent and antistatic. Specific contents of the processing method are shown in Table 3 below.

Table 4 shows the equilibrium moisture content of paddy, which is balanced by air temperature and relative humidity. The water repellent bag filter also has a reduced water repellent effect over time, and in particular, since the moisture content of the rice brought into the harvest season is more than 24%, the relative humidity of the contaminated air passing through the high moisture rice is very high, more than 95%. In the rainy season, the relative humidity of the outside air is very high, so the air filter with the high relative humidity makes the bag filter wet, and dust is entangled inside the bag filter to block the fine core of the bag filter, thereby increasing the blowing resistance and collecting efficiency. Not only does it degrade, but it also becomes impossible to use the bag for a long time. Therefore, according to a preferred embodiment of the present invention, after comparing the differential pressure measured in the differential pressure meter () installed in the polluted air inlet with the set value in the controller, when the borrowing is higher than the set value, the dust collection system operation is stopped Afterwards, it is preferable to dry the bag filter by operating the drying blow fan () and the heater () installed with the reverse side at the polluted air inlet for a predetermined time.

Processing method Processing method and features Remarks end. Moso processing or gloss processing General finishes that roughen or smooth surfaces to facilitate dust removal I. Water repellent Finishing method that prevents moisture or moisture from penetrating the media surface All. Oil Refining Finished with silicone or fluorocarbon chemicals to withstand oil or sticky dust on the bag la. Acid / Alkali Resistance Processing Finished with silicon or fluorocarbon chemicals to withstand the attack of bags with strong acid or strong alkaline characteristics hemp. Antistatic Processing Surfaces are treated with carbon or sus fiber in order to control dust and friction, even if there is a risk of fire or explosion. bar. Flame Retardant Processing Surface processing using special medicine so that even if there is a ember or a flame in the inlet gas, the bag does not catch fire rapidly and is delayed. four. Acrylic / Urethane Foam Coating Directing surface filtration by making microporous surfaces Ah. Teflon coating Teflon chemicals with excellent chemical, water and heat resistance are finished using methods such as dipping, spraying and impregnation character. Teflon membrane Highly difficult surface treatment processing by stretching microporous Teflon film excellent in chemical resistance, water resistance, and heat resistance and laminating it on general media car. Etc Bacteria processing, flameproof processing

Temperature
(℃)
Equilibrium moisture content of rice by relative humidity (%, wb)
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 10
8.2 8.9 9.6 10.3 10.9 11.6 12.2 12.9 13.6 14.4 15.2 16.1 17.2 18.5 20.1 15
7.8 8.6 9.3 9.9 10.6 11.2 11.9 12.6 13.3 14.1 14.9 15.8 16.9 18.2 19.9 20
7.5 8.2 8.9 9.6 10.3 10.9 11.6 12.3 13.0 13.8 14.6 15.5 16.6 17.9 19.6 25
7.1 7.9 8.6 9.3 10.0 10.6 11.3 12.0 12.7 13.5 14.3 15.2 16.3 17.6 19.4 30
6.8 7.6 8.3 9.0 9.7
10.3 11.0 11.7 12.4 13.2 14.1 15.0 16.1 17.4 19.1 35
6.5 7.3 8.0 8.7 9.4 10.1 10.7 11.4 12.2 13.0 13.8 14.7 15.8 17.2 18.9 40
6.3 7.0 7.8
8.5 9.1 9.8 10.5 11.2 11.9 12.7 13.6 14.5 15.6 16.9 18.7

According to a preferred embodiment of the present invention, the filter cleaning means includes all physical impact means capable of removing dust or dust remaining in the bag filter 2 available to those skilled in the art, but energy efficiency and dust collection system construction In consideration of the economical efficiency, the vibration motor 5 installed around the bag filter 2 to generate vibration and the vibration motor 5 installed on the vibration motor 5 uniformly transmit the generated vibration to the plurality of bag filters 2. It is most preferable to use the dust removal bar 6 for this purpose. The exhaust bar 6 is installed around a plurality of exhaust bars to serve to uniformly transmit the vibration generated in the vibration motor 5 to all the bag filters.

According to a preferred embodiment of the present invention, the present invention further comprises a bag filter drying means used to dry the bag filter in order to prevent the bag filter from being wet with moisture and thus reducing the dust collection efficiency and increasing the blowing resistance. To provide a dust collection system.

According to a preferred embodiment of the present invention, the drying means is coupled to the side or top surface of the polluted air collection station (3) which can inject a high-temperature gas; A blowing fan 15 coupled to an end of the connecting pipe 12 to move a hot gas to the polluted air collection station 3; A heater 16 coupled to the blower fan 15 to increase the temperature of the gas introduced thereto; A differential pressure gauge (11) coupled to the contaminated air collection station (3) or the connection pipe (12) to control the pressure of the air flowing into the contaminated air collection station (3); And a controller 13 for controlling the operation of the drying means.

According to a preferred embodiment of the present invention, a plurality of bag filters 2 are provided below the plurality of bag filters 2, and a collection chamber 1 capable of collecting dust or dust remaining by the bag filters. The collection chamber 1 is preferably a structure capable of storing dust or dust dropped by the operation of the filter cleaning means and efficiently transferring the dust or dust to the dust discharge means to be described later. Most preferably.

According to a preferred embodiment of the present invention, the dust discharge means may be any device capable of automatically discharging dust or dust collected in the collection chamber, dust generated in the grain processing plant or grain dry storage facility Alternatively, considering the size or shape of the dust particles, it is most preferable to discharge through the rotary valve 8 using the screw conveyor (7).

According to a preferred embodiment of the present invention, the dust collecting system of the present invention after the contaminated air through the polluted air inlet (4) for each process, the bag filter (2) through the polluted air collection station (3) It is characterized in that the contaminated air is purified in the process of flowing into the inside, the outflow to the outside of the bag filter (2). At this time, between the process of generating the polluted air flowing into the polluted air inlet (4) per process and the blower fan, the inlet of the outside air can also suck in the outside air, and a damper that can adjust the amount of outside air to be sucked. It is most desirable to secure the exact amount of dust required for each process.

In the present invention, the air blower is installed before the dust collecting system, and the contaminated air is purified in the process of flowing into the bag filter of the contaminated air and flowing out of the bag filter. Of course, the present invention can be installed in one dust collecting system, it is very important in order to lower the manufacturing cost of the present dust collecting system.

Conventional exhaustion method is related to the air flow of the bag filter, which sucks the contaminated air into the blower from the outside of the long bag-shaped filter to the inside of the bag, leaving the dust outside and the filtered air passing inward and discharged to the top. In this case, since the shape of the filter cloth is easily deformed, an iron cage structure is installed inside each filter to maintain the shape, and the general structure of the iron cage is shown in more detail in FIG. 6.

In this structure, the low pressure method (high pressure blower, 0.5 kgf / cm 2) and the high pressure method (air compressor, 5 kgf / cm 2) are periodically compressed (about 2 minutes) to exhaust (dust) dust deposited on the outside. Spacing) is controlled using electrical control system equipment and is sprayed into the filter (see FIG. 8).

Expensive equipment such as a header (air storage), a diaphragm valve, a solenoid valve, and the like are installed in each bag filter dust collecting system for exhaustion (see FIG. 8). Table 5 below shows an approximate price ratio of the bag filter dust collection system currently used in the MIC. Here, the price ratio of the filter occupies only about 1%, while the price ratio of the upper headers, valves, etc. occupies about 30% or more. As a result, it can be seen that a considerable cost can be saved in the fabrication of the dust collection system.

division Price ratio (%) Remarks Top Header 18 Dust Removal Device valve 15 sub Total 33 bottom Body (back mounting part) 20 Hopper (dust collection) 19 Structure prices vary depending on site conditions Structure (Site Installation) 19 Rotary valve 8 sub Total 66 filter One Sum 100

According to a preferred embodiment of the present invention, the dust collecting system of the present invention can be used wherever dust or dust is generated, but a large amount of dust blowing blows the length of the bag filter to reduce the blowing resistance and increase the filtration efficiency. It is most preferable to use it in Rice Processing Complex (RPC) or Drying and Storage Center (DSC) where the ceiling height of the manufacturing facility is secured and the size of dust or dust particles is relatively large. .

The features and advantages of the present invention are summarized as follows:

(a) the present invention (i) at least one process-specific contaminated air inlet (4); (Ii) a contaminated air collection station (3) capable of collecting contaminated air introduced from the inlet and filtering the contaminated air for each process through a bag filter (2) below; (Iii) a plurality of bag filters (2) installed in the contaminated air collection station and capable of purifying contaminated air; (Iii) filter cleaning means for removing dust by applying a physical force to the bag filter (2); (Iii) a collecting chamber (1) provided under the bag filter (2) to collect and remove the separated dust; And (iii) provides a dust collecting system consisting of dust discharge means installed in the lower collecting chamber.

(b) The dust collecting system of the present invention includes a plurality of bag filters 2, which have a longer width and length than those of a conventional bag filter. Filtering is possible, there is an advantage that can increase the energy consumption efficiency.

(c) The dust collecting system of the present invention can greatly reduce the blow resistance by increasing the surface area of the filter, and reduce the capacity and specification of the blower used in the low specification, and the existing expensive pneumatic dust removal device using a mechanical motor The replacement of the device eliminates the need for a separate high pressure blower, air compressor, header (air storage), multiple diaphragm valves and solenoid valves, and eliminates the need for cages, which can dramatically reduce manufacturing and maintenance costs. There is this.

(d) The dust collecting system of the present invention uses an antistatic water repellent treated bag filter, and attaches a bag filter drying means composed of a differential pressure gauge, a controller, a dry blower, and a heater to collect dust in rainy season or high moisture rice, and then Drying the wet bag filter has the advantage of reducing the blowing cost, increasing the dust collection efficiency, as well as increasing the durability of the bag filter to significantly reduce the maintenance cost.

(e) Since the various processes are collected and collected, if it is impossible to install it inside the Migok General Treatment Plant, it is possible to simply install the building outside and install the ventilation port that flows out to the outside. There is an advantage that can be installed in different numbers depending on the size.

1 is a perspective view of a dust collecting system of the present invention.
Figure 2 shows a side view of the present dust collector system. The solid arrows indicate the flow of contaminated air containing dust or dust, and the arrows of the dashed-dotted line represent the flow of air from which dust or dust has been removed. The contaminated air introduced through the inlet 4 is filtered by the pressure of the blower through the contaminated air collection station 3 and into the bag filter 2. The filtered air is discharged out of the dust collecting system through the side of the bag filter, and the dust or dust remaining in the filter falls in the collection chamber 1 by the vibration generated by the filter cleaning means, and the accumulated dust or dust is stored in the The dust is discharged out of the dust collecting system through a dust discharge means installed in the lower collecting chamber. The dashed dashed line represents the flow of bag filter dry air. If the differential pressure measured by the differential pressure gauge 11 installed in the polluted air collection station is higher than the set value, after the dust collecting system is stopped, the drying filter 14 and the blower fan 15 installed together with the reverse displacement at the polluted air inlet. And heater 16 operate for a time set by controller 13 to dry the bag filter.
3 shows the operating principle of the contaminated air inlet 4. The polluted air inlet (4) has a check value composed of a plurality of opening and closing means that are opened only in the polluted air collection inward direction, to prevent the polluted air to flow back to another process to stop prevent.
4 is a plan view of the dust collecting system of the present invention. The arrows indicated by the solid line indicate the direction in which the polluted air by the process enters the inlets 4 A, B and C, and a number of circles inside the rectangle indicate the bag filter 2.
5 shows the filter cleaning means of the present invention dust collection system. In the filter cleaning means, a vibration motor 5 generating vibration generates vibration, and a dust extraction bar 6 installed around the bag filter 2 receives vibration generated by the vibration motor. It is uniformly delivered to, and serves to remove dust or dust remaining on the fine pores of the filter.
Figure 6 shows an installation example of the present dust collector system. In the present invention, in the process of installing the blowers before the dust collection system, the polluted air generated in each process flows into the bag filter 2 through the polluted air collection station 3 and out of the bag filter. Since the polluted air is purified, the process enables dust collection of contaminated air generated in various processes to one dust collecting system of the present invention, thereby significantly lowering the manufacturing cost of the dust collecting system of the present invention.
Figure 7 shows the structure of the cage, etc. to prevent the shrinkage of the bag filter according to the air inflow of the existing bag filter.
8 shows the structure of a conventional bag filter.
9 shows the structure of a conventional bag filter.

Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not to be construed as limiting the scope of the present invention. It will be self-evident.

Example

Fabrication of Dust Collecting System for Grain Drying Storage and Processing Facilities

The polluted air collection station was constructed in the form of a cuboid. On the side of the polluted air collection station, dust or dust generated in each process of the grain drying storage facility, inlet, shipbuilding and circulation dryer, inlet of processing facility, integrated refiner, brown rice erection, and brown rice are generated using the pressure of air blowing. A contaminated air inlet that can introduce dust or dust is formed. The contaminated air inlet is provided with a lift check valve to prevent backflow of contaminated air to a process that is stopped during a plurality of processes connected to the inlet due to unbalanced air pressure. The polluted air collection station was installed with a differential pressure gauge that can measure the positive pressure difference between the outside air, and formed a heated air inlet through which heated air for drying the bag filter can be introduced when the bag filter is wet. The heated air inlet is equipped with a filter, a blower fan and an electric heater, and a controller for operating the blower fan and the electric heater is installed. The bottom of the polluted air collection station is formed with a plurality of circular holes to be equipped with a plurality of bag filters. Bag filters are attached to the plurality of circular holes, and the seams of the circular holes and the bag filter are prevented from leaking contaminated air, and the bag filter is firmly coupled with the bag filter to easily replace the bag filter. Grooves were made and banded. A vibration motor was installed as a filter cleaning means for removing dust by applying vibration to the side surfaces of the plurality of bag filters, and a dust extraction bar was formed around the bag filter to transfer the vibration generated by the vibration motor to all installed bag filters. The end of the exhaust bar is connected to the vibration motor to evenly transmit the vibration of the vibration motor to all the bag filters. Thereafter, a plurality of bag filters were installed at the other ends of the hopper (funnel) collection chambers for collecting dust or dust dropped by the operation of the filter material means, and the dust or dust in the collection chambers was collected and concentrated. A screw conveyor was installed at the lower part of the lower part, and a rotary valve was installed as a means for discharging accumulated dust or dust carried by the screw conveyor.

Operation of Dust Collecting System for Grain Drying Storage Facility and Processing Facility

Dust or dust generated at the input port, shipbuilding machine and circulating dryer of each process of grain drying storage facility, input port, integrated sorting machine, brown stone erection machine and brown rice part at each process facility of processing facility Into the inlet by The contaminated air inlet has a check value composed of a plurality of opening and closing means that are opened only in the contaminated air collection direction, so that the contaminated air flows back to another process inlet in which the contaminated air is stopped. prevent. The contaminated air introduced through the inlet is filtered by the pressure of the blower through the contaminated air collection station and into the bag filter. The filtered air is discharged out of the dust collecting system through the side of the bag filter, and the dust or dust remaining on the filter falls and accumulates in the collection chamber by the vibration generated by the filter cleaning means. In the filter cleaning means, a vibration motor 5 generating vibration generates vibration, and a dust extraction bar 6 installed around the bag filter 2 receives vibration generated by the vibration motor. It is uniformly delivered to, and serves to remove dust or dust remaining on the fine pores of the filter. The accumulated dust or dust is discharged out of the dust collecting system through a dust discharge means installed under the collection chamber. The bag filter drying means receives a signal that the dust collecting system is stopped through the controller 13 when the differential pressure measured by the differential pressure gauge 11 installed at the polluted air inlet becomes abnormal. 16) and blower fan (15) is heated to a set temperature to send to the polluted air inlet serves to dry the wet bag filter.

Claims (12)

Dust collection system including:
(a) one or more process-specific contaminated air inlets (4);
(b) a contaminated air collection station (3) capable of collecting contaminated air introduced from the inlet and filtering the contaminated air for each process through a bag filter (2);
(c) a plurality of bag filters (2) installed in close contact with the contaminated air collection station and capable of purifying contaminated air;
(d) filter cleaning means installed on the side of the bag filter (2) to remove dust by applying a physical force to the bag filter (2);
(e) a collecting chamber (1) provided below the bag filter (2) to collect and remove the dust removed; And
(f) Dust discharge means installed in the lower collecting chamber.
2. The polluted air inlet (4) according to claim 1, wherein the polluted air inlet (4) comprises a check value consisting of at least one opening and closing means that is opened only in the direction of the polluted air collection station to prevent the backflow of the polluted air Dust collection system, characterized in that.
The dust collecting system according to claim 1, wherein the bag filter (2) has a length of 5,000 mm to 10,000 mm in order to reduce the blowing pressure and to facilitate dust removal.
The dust collecting system according to claim 1, wherein the bag filter (2) has a number of 1 to 1000 in order to reduce blowing pressure and facilitate dust removal.
The dust collecting system according to claim 1, wherein the size of the dust flowing into the bag filter (2) is 8-100 µm.
The dust collecting system according to claim 1, wherein the dust collecting system further includes bag filter drying means used to dry the bag filter to prevent the bag filter from being wet with moisture and thus reducing the collection efficiency and increasing the blowing resistance. system.
The method of claim 6, wherein the drying means is connected to the side or the upper surface of the polluted air collection station (3) for injecting a high-temperature gas 12; A blowing fan 15 coupled to an end of the connecting pipe 12 to move a hot gas to the polluted air collection station 3; A heater 16 coupled to the blower fan 15 to increase the temperature of the gas introduced thereto; A differential pressure gauge (11) coupled to the contaminated air collection station (3) or the connection pipe (12) to control the pressure of the air flowing into the contaminated air collection station (3); And a controller (13) for controlling the operation of the drying means.
According to claim 1, wherein the filter cleaning means is installed on the vibration motor 5 and the vibration motor 5 for generating vibration vibration exhaust bar for uniformly transmitting the generated vibration to the plurality of bag filter ( 6) dust collecting system, characterized in that consisting of.
The dust collecting system according to claim 1, wherein the collection chamber is in the form of a hopper.
The dust collecting system according to claim 1, wherein the dust discharge means discharges through a rotary valve (8) using a screw conveyor (7).
The method of claim 1, wherein the dust collecting system is introduced into the bag filter (2) through the polluted air collection station (3) after the polluted air flows through the polluted air inlet (4) for each process, Dust collecting system, characterized in that the polluted air is purified in the process of flowing out of the bag filter (2).
The dust collecting system according to claim 1, wherein the dust collecting system is used in a Rice Processing Complex (RPC) or a Drying and Storage Center (DSC).

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