The practical design scheme of pulse filter

Practical design scheme of pulse dust collector solenoid valve research and development department practical design scheme of pulse dust catcher. New pulse dust catcher docx boot advice B. Each new filter must be installed a differential gear, differential pressure gauge of dust filter online connection plate upper and lower chamber, offline of ash removal filter differential pressure meter shall be connected on flue gas inlet tube and plate clean air chamber. The purpose of installing differential pressure gauge is used to monitor the filter run run is normal. Simple way has a 'U' type gauge, pressure difference display table, differential pressure transmitter, pressure difference display control and so on. The benefits of this are ready to understand the status of the filter run. B。 Filter shell structure after the installation, first using the differential device detection filter under the condition of no load, the resistance of the filter bag before and after whether meet the design requirements, and record for later for the use of equipment operation file. B。 The electromagnetic pulse valve installed on the gas bag correctly, slowly will pack booster, color the soap and water in the pulse valve and into the trachea or flange connection position, observe whether there is discouraged. If air leakage, pressure relief immediately, must restore pulse valve installation. If the air bag to kPa pressure and not discouraged, passed leak test. Low pressure system must also pass the standard pressure test, or must be installed on each air bag safety relief valve. Pay attention to safety first! ! ! Open the air bag at the bottom of the drain valve pressure relief, then slowly pressurization cleaning the air bag inside, this time of the pulse electromagnetic valve cannot be opened, in order to prevent the welding slag and rust with compressed air flowing through the valve diaphragm adsorption on the diaphragm, diaphragm damage. After confirm air bag inside have clean, close the drain valve, connecting the compressed gas in the gas bag to the design pressure of the air bag. Note if insufficient supply of compressed air flow when the trial run, into the gas in the plant package of compressed air tube is smaller than the scene, you must add air pressure, to compensate for the insufficient of the traffic. According to the control system of ash removal system design input pulse width and injection interval. Note must be taken into account in the plant gas pressurization time, injection time gap between the valve may be longer than the scene. Then access pulse control signal, drive pulse, electromagnetic valve, injection experiment was carried out to determine each solenoid valve operating normally. Injection test is completed, clean up the injection pipe welding slag and rust, ( The sampling) Connection spray torch on pulse valve, to ensure the quality of spray torch processing qualified. Remove the ash removal system package shipment. Note equipment transportation, must separate the ash removal system ( Pulse electromagnetic valve, oil and water filter, pressure gauge, etc. ) Remove the package delivery to prevent damage in the process of transportation and equipment hoisting ash removal system. B。 Before the dust boot operation best pretreatment tested phosphor powder and talcum powder. Test is used to check whether there is dust leakage phenomenon of phosphor. Phosphor should be about meters from dust into the pipe into the wind, fluorescent powder in the above, start the fan running at least minutes after ensure phosphors in each indoor achieve uniform distribution, and then if there is a leak phenomenon observed filter structure. This process is best at night, the effect will be obvious. B。 Talcum powder pretreatment can form a protective layer on the surface of filter material, the filter material have a adapt to the process. The talcum powder into the intake pipe, to start the fan increases in atmospheric flow to meet the design requirements, record the change of the filter resistance parameters. When resistance to meet the design parameters ( kPa) , start the ignition and boot, while maintaining air flow, is higher dust concentration and temperature, until the filter resistance reaches kPa, restart precipitator ash removal system. B。 If the dust handling and use of filter material is belong to the special material ( Such as glass fiber coated filter material, etc. ) Need to consult the filter material suppliers, boot. B。 Dust boot after the operation, whether need to pay attention to the dew point temperature change according to the design requirements. Because of the dew point temperature change will directly affect the service life of filter material, if long-term high temperature and high humidity or low temperature and humidity condition, is easy to appear the phenomenon of hydrolysis, the filter material corrosion damage to shorten the life, so pay attention to the dew point temperature change can do heat insulation measures as soon as possible. B。 Dust boot after the operation, if the use of sequential control soot cleaning way, in the case of a valve with each valve valve, the interval between the second interval between a cycle for minutes. Sequential soot cleaning time is as the filter resistance increases, and constantly adjust to shorten, so the dust collector installed on the differential device is very important. B。 Dust boot after the operation, if the soot cleaning way is to use the pressure difference control, kPa design parameters, for example, cap injection parameters set at the beginning of the kPa soot cleaning, floor injection parameters set in kPa to stop dust, blowing between valve and valve clearance between ~ seconds, but must meet the scene of the air bag filling gas pressurization time. In every time before starting the pulse valve, the pressure in the gas bag must be able to meet the design pressure, otherwise the ash removal system will be failed in filter material paste bag. Such a set can reduce the number of pulse injection, load, reduce the resistance of filter material to enhance the working life of the filter material. The time interval of valve is also as the filter resistance increases, corresponding adjustments. B。 Dust boot after the operation, besides gap injection time, injection pressure can also be run according to the filter resistance of high and low to adjust. There is no absolute low pressure pulse dust and absolute ash removal, high voltage pulse injection pressure also according to the size of the dust concentration, the material of filter material to decide, the design of the new filter to achieve adjustable injection system is the most complete. The first page of the first page, pp