LOW PRESSURE BACK CLEANING SYSTEM FOR FILTER BAGS

Abstract

The invention relates to a novel backcleaning system for jet filters, where bags are cleaned by periodically blowing compressed air in the reverse direction, that allows the use of low-pressure and high-flow air instead of high-pressure and low-flow air, without a blast valve, thus reducing both bag damage and energy and maintenance costs for the generator.

Description

1 TARIFF 5 LOW PRESSURE BACK CLEANING SYSTEM FOR FILTER BAGS Technical Area The invention is for use in jet filter systems, with a lower filter bag cleaning efficiency of 10%. A new reverse cleaning system enables the use of pressurized and higher flow rate air. It is related to the system. State of the Art Cleaning the jet filter bags involves periodically reversing the cleaning process with compressed air while the filter is operating. 15 This is done by blowing. During the normal aspiration process, dusty air passes through filter bags. Dust is trapped on the outer surface of the bags, while the air is filtered through the bags, removing the dust. It continues on its way. The dust collected in the bags gradually forms a thick layer and is aspirated. This will cause an obstacle. To prevent this, periodically, air will be injected into the bags, one after the other, in the opposite direction. The bags are whipped by blowing into them. Following this whipping motion, 20 particles separate from the bags. Ideally, 80% of the dust falls below the filter, passing through an airlock via the filter cone. It is extracted. Approximately 20% of the powder separated from the bags is then used in other ways. It adheres to the surface of the bags. The reverse air blowing process is repeated periodically, generally every 10 seconds. This is done over a period of 500ms. The number of bags blown into simultaneously is ideally the total number of bags. The number should be less than 5%. Central system 25 for cleaning filter bags. Air supplied from the compressor is used. Figure 1 shows high-pressure backwashing used in the known state of the technology. The system is shown. In a classic high-pressure back-blowing bag cleaning system, an air The tank contains (1), burst valves (2), nozzle pipe (3), nozzles (4) and a timer (5). (1) The volume is determined to be approximately 5 liters per number of bags to be cleaned in one blow. 30 in the tank (1) The air pressure used is generally 6 bar. (2) The body size of the blow-off valves is for each valve (2) is determined according to the number of bags to be cleaned. If the valve body (2) is 3 / 4", 2 bags, if it is 1", 4 bags. If the bag is 1.5", 8 bags can be cleaned, if it is 2", 16 bags can be cleaned. The nozzle tube (3) is generally a burst valve (2) It will be in the following dimensions. Nozzles (4) are selected with a diameter of 10-15mm. All these values ​​are according to the process. There may be differences. When selecting the general burst valve (2) body type, the 35 located in the nozzle tube (3) Make sure that the sum of the cross-sections of the nozzles (4) is smaller than the cross-section of the orifice of the burst valve (2). It is energized. By energizing the coil of the burst valve (2), the valve (2) allows air to pass through. The coil When the power is cut off, the valve (2) closes again. The valve (2) coils turn in sequence for certain periods of time. 2 An electronic device called a timer (5) is used to energize it. Blast valve (2) 5 The air passing through it reaches the blowing nozzles (4) via a nozzle tube (3). Nozzles (4), conical with narrowed ends to allow air to effectively clean the bags It has a geometry. In some filters, in addition to the nozzles (4), there are also devices called venturi. It can be used. Thanks to the venturi, additional air can be added to the bags as well as the air passing through the nozzles (4). Because it enters the system, the amount of cleaning air passing through the bags is doubled. 10 Technical Problems That the Invention Aims to Solve The fact that the filter bag cleaning system takes up little space on the filter, the tank (1), burst by reducing the size of the valves (2), nozzle tube (3) and nozzles (4) and reducing their cost The flow rate used needs to be reduced. With the reduction in flow rate, the same cleaning power can be achieved by 15. In order to obtain this, the pressure needs to be increased. General cleaning of filter bags. High-pressure air at 6 bar is used. This allows the jet filters to operate themselves. Manufacturing costs are decreasing. However, this is important for the end user who uses the jet filter. When examined, it is seen that despite the decrease in the price of jet filters as a fixture, the air pressure is increasing. As a result, the operating costs of the filter increase excessively. Instead of 0.5 bar air, it uses 6 bar air for 20... Even just a one-year increase in operating costs for a jet filter that needs cleaning would cost the jet filter a fixed asset. The cost can be higher than expected. This is because as pressure increases, the efficiency of compressors decreases. Energy consumption and maintenance costs are decreasing, while 6 bar air screw pressure is increasing. While produced in compressors, air is pumped through much more efficient machines called 0.5 bar air blowers. is produced. 25 Another problem is that the high-pressure air blown into the bags damages them. and causes the bags to burst in a short time. If the blowing nozzle (4) is not perfectly centered Or if its position shifts over time, the airflow may not go exactly into the center of the bag, but only slightly. It slides towards the edges. In these cases, high-pressure air bags can be cut very briefly. This causes it to tear in a short time. 30 Another problem is the problems that occur in burst valves (2). Blow valves (2) very frequently It malfunctions. The coils fail quickly. Very little water gets into the diaphragms. If it escapes, it becomes inoperable. The diaphragms on the burst valve (2) They also have a lifespan, and as the opening times increase over time, they become more difficult to strike. Their effectiveness is decreasing. Cleaning of the bags depends on the impact force. 35 stored in the tank (1) Since the energy of the air is constant, the force of the impact on the tank can be calculated using the formula "Power = Energy / Time". It depends on how quickly they empty. Therefore, two filters cleaned with the same air... Those with new diaphragms clean 5-10 times more effectively than those with old diaphragms. 3 They are able to do this. Therefore, diaphragms are a consumable that needs to be replaced when they become stale. It requires materials, but material and labor costs are high. In order to solve all these problems, a low pressure and no burst valve (2) is required. A new system is needed that can clean the filter bags with a high flow rate. Image Explanations 10 Figure 1: High-Pressure Blast Valve Cleaning System in the State of the Art. Figure 2: Cleaning System Without Low-Pressure Blast Valve, Subject to the Invention Figure 3: The Moment of Blowing in the Cleaning System Subject to the Invention Description of Parts Shown with Reference Numbers in the Images 15 1. Filter air tank 2. Solenoid valve 3. Nozzle tube 4. Nozzles 5. Timer 20 6. Low pressure tank 7th Cylinder 8. Cylinder piston 9. Sealing device 10. Low pressure nozzle tube 25 11. Low pressure nozzles 12. Solenoid valve Description of the Invention For use in jet filters, for cleaning filter bags at lower pressure and higher pressure (30°C). The invention's reverse valve (2) which will allow the use of air in the flow rate. A cleaning system has been developed. The new system, which is the subject of the invention, is shown in Figure 2. In this system... There is no burst valve (2). The system has one low-pressure air tank (6). This tank will use 0.5 bar of air instead of 6 bar. Because the pressure will drop, the same impact force will be achieved. In order to obtain this, the flow rate needs to be increased. For this reason, low pressure tank (6) 35 The volume has been increased compared to the classic method. In a 6-bar system, the volume per bag to be blown is 5L. If necessary, a tank volume of 75L (6) will be used per bag to be blown in the 0.5 bar system. The tank There is one cylinder (7) on (6). The cylinder (7) body will be outside the tank (6). 4 However, the moving piston (8) of the cylinder (7) will be located inside the tank (6). Cylinder 5 A sealing device (9) will be located at the end of the piston (8). This device (9) is approximately 100mm It is 10mm in diameter and 10mm thick, preferably manufactured by coating sheet metal with rubber. The apparatus (9) material is designed to perform the same function and wear away. Durable engineering polymers and plastics such as polyamide, kestamit, and Teflon are also used. Tank (6) has a low pressure nozzle pipe (10) at its outlet. Sealing device (9), tank (6) 10 It ensures airtightness between the nozzle tube (10) and the diameter of the nozzle. It must be larger than the pipe (10). The cylinder piston (8) must be completely outside the cylinder (7). When it comes out, the sealing device (9) completely covers the nozzle tube (10). In this way The air in the tank (6) cannot pass into the nozzle pipe (10). The cylinder piston (8), cylinder (7) When inserted, the sealing device (9) will no longer press against the nozzle tube (10), 15 The air in the tank (6) flows through the nozzle pipe (10) and the low pressure nozzles (11). The bags are blown into. Figure 2 shows the sealing device (9) when no blowing is done. Figure 3 shows the position of the sealing device (9) at the moment of blowing. It shows the position. Opening and closing of the sealing device (9) is connected to this device (9). This is due to the forward and backward movement of the cylinder piston (8). The cylinder piston (8) 20 The movement is achieved by supplying compressed air to the cylinder (7). Supplying compressed air to the cylinder (7) A solenoid valve (12) is used for this. The solenoid valve (12) opens and closes the air. This happens when energy is supplied to the solenoid valve (12) coils. The solenoid valve (12) coils periodically In the same way as in the classical system, for energizing them sequentially over specific periods of time. a timer (5) is used. 25 The cross-section of the nozzle pipe (10) is much larger than the flow rate of the pipe (3) that does the same work in the classical system. Because there is more, it will be larger. Again, the low-cost components used in the system that is the subject of the invention. The diameter of the pressure nozzles (11) is higher than the nozzles (4) used in the classical system. Due to the flow rate, it is larger. In general, the nozzle (11) diameter will be 25-30 mm. Nozzle The cross-section of the pipe (10) is 30 of the cross-sections of all the nozzles (11) in the nozzle pipe (10). It must be greater than the total. Measurements may vary depending on the process. The system described in this invention will use air at a pressure of 0.5 bar instead of 6 bar. (6 bar air) While air is produced in the compressor, 0.5 bar of air will be produced in the blower. This ensures that the produced air... The cost will decrease. Blowers have lower equipment costs compared to compressors. These are pieces of equipment. Both their failures and maintenance costs are much lower. The system that is the subject of the invention has 35 The burst valve (2) is not used. In this way, all malfunctions and periodic maintenance of the burst valves (2) are not affected. and the need for consumables is eliminated. The bag becomes smoother as the pressure decreases and the flow rate increases. Their lifespan is extended. Tearing problems caused by high-pressure air in the bags are eliminated. It is removed. Since the system described in the invention will not contain electrical parts near a dusty environment, dust 5 It will also be useful in reducing the risk of explosion. The system described in the invention will be used both in newly manufactured jets. both in the filters and in the existing high-pressure filters with simple revisions. It can be used. The way the invention is applied to industry, the innovations it brings, and these innovations technical effects; - Timer (5), Low pressure tank (6), Cylinder (7), Cylinder piston (8), Seal 10 apparatus (9), Low pressure nozzle tube (10), Low pressure nozzles (11), Solenoid having valves (12) - The timer (5) periodically activates the solenoid valve (12) in sequence for a specified period of time. It has a structure that can send electrical signals to its coils, - The low pressure tank (6) is made of steel or similar material to store air at a pressure of 0.5 bar. made of the same material, with a volume of approximately 75 L per bag to be blown, A cylinder (7) will be mounted on it, and the cylinder piston (8) will move inside it. will prevent air leakage from the connections of the equipment on it It is manufactured with a leak-proof structure. - The cylinder (7) is mounted on the low pressure tank (6), and the cylinder piston (8) is 20 The cross-section that can move the compressed air in the tank (6) back and forth is such that being of a certain size, - The cylinder piston (8), the sealing device (9) to be attached to the end of the tank (6) and the nozzle The pipe (10) must have a cross-section and diameter that can open and close the air passage between it. - The sealing device (9) is connected to the nozzle tube (10) via the cylinder piston (8) 25 When pressed, it will completely close the air passage from the tank (6) to the nozzle tube (10). It should be made of a wear-resistant material, in the specified dimensions. - Air inlet of low pressure nozzle tube (10) with sealing device (9) When the apparatus (9) is opened, the compressed air coming from the tank (6) can be closed. It must be manufactured in such a way as to transmit the water to the nozzles (11) without causing any loss, 30 - Nozzles (12) are mounted in holes to be drilled under the low pressure nozzle tube (10), The blowing nozzles should have a diameter of 10-15 mm to blow compressed air into the bags. It has a narrowed conical structure. Industrial Applications of the Invention 35 The "Low-Pressure Back Cleaning for Filter Bags" process, detailed above, Our invention, entitled "The System," can be produced and used in any branch of industry. It is feasible.

Claims

6 REQUIREMENTS 5 1. For use in jet filters, for cleaning filter bags at lower pressure and more efficiently. a new reverse system that will allow for high-flow air usage and has no blow-off valve It is a cleaning system; its feature is: - Timer (5), Low pressure tank (6), Cylinder (7), Cylinder piston (8), Seal apparatus (9), Low pressure nozzle tube (10), Low pressure nozzles (11), Solenoid 10 having valves (12) - The low pressure tank (6) is made of steel or similar material to store air at a pressure of 0.5 bar. made of the same material, with a volume of approximately 75 L per bag to be blown, A cylinder (7) will be mounted on it, and the cylinder piston (8) will move inside it. 15 to prevent air leakage from the connection of the equipment located on it It is manufactured with a leak-proof structure. - The cylinder (7) is mounted on the low pressure tank (6) and the cylinder piston (8) The cross-section that can move the compressed air in the tank (6) back and forth is such that being of a certain size, - The cylinder piston (8), the sealing device (9) to be attached to the end of the tank (6) and the nozzle 20 The pipe (10) must have a cross-section and diameter that can open and close the air passage between it. - The sealing device (9) is connected to the nozzle tube (10) via the cylinder piston (8) When pressed, it will completely close the air passage from the tank (6) to the nozzle tube (10). It should be made of a wear-resistant material, in the specified dimensions. - Air inlet of low pressure nozzle tube (10) with sealing device (9) 25 When the apparatus (9) is opened, the compressed air coming from the tank (6) can be closed. It must be manufactured in such a way as to transmit the material to the nozzles (11) without causing any loss. - Nozzles (12) are mounted in holes to be drilled under the low pressure nozzle tube (10), The blowing nozzles should have a diameter of 10-15 mm to blow compressed air into the bags. with its narrowed conical structure, 30 It is characteristic.

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