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Anonymous users2024-02-16The dust removal equipment for handling pulverized coal belongs to explosion-proof dust removal equipment, and the fan and control circuit should be explosion-proof.
The explosion-proof valve, also known as the negative pressure explosion-proof door, is a new generation of negative pressure protection products developed by Dalian three-phase machinery and equipment development for many years. The device adopts magnetic automatic opening and closing technology, the action pressure is accurate, and it automatically resets after the action without stopping. It is a new type of product that protects the boiler body and flue from being deflated.
In the operation of thermal power plant units, when the boiler induced draft fan is not operating normally, resulting in the furnace being under the excessively high induced air pressure head, and at the same time, due to the rapid reduction of fuel input or total fuel tripping, resulting in a sharp decrease in furnace flue gas and pressure, the combination of this bad working condition will lead to the implosion of the furnace (suction deflated), and the superconducting magnetic preload explosion-proof valve is installed on the flue in front of the boiler body and the dust collector, which can make the boiler replenish air to the boiler and flue in advance when implosion occurs, so as to avoid permanent deformation of the furnace and flue.
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Anonymous users2024-02-15The dust removal equipment for handling pulverized coal belongs to explosion-proof dust removal equipment, and explosion-proof treatment is required according to the standard fan and control circuit.
Working conditions. 1.Pressure range: -10kpa +20kpa2Temperature range: -20 395
Mounting site. Implosion prone to implosion on the boiler body and on the flue in front of the dust collector.
Installation requirements. 1.The installation of the explosion-proof valve can be installed at any angle.
2.The minimum installation distance between the two explosion-proof valves is 200mm, which is classified according to the installation form.
There are generally two types of explosion-proof valves, horizontal explosion-proof valves and vertical explosion-proof valves. Both kinds of explosion-proof valves are covered with explosion-proof membrane, the vertical explosion-proof valve is installed on the cylinder, and the horizontal explosion-proof valve is installed on the top.
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Anonymous users2024-02-14First, the leakage of the electromagnetic pulse valve is a common fault of the air box pulse bag filter, and the reasons for the failure are: (1) The diaphragm of the electromagnetic pulse valve is damaged. At this time, all the pulse valves of the dust collector do not work, the pressure of the air bag is rapidly reduced to zero, the cylinder is closed, the pressure difference of the dust collector continues to increase, and the ventilation volume is rapidly reduced; If the filter bag is damaged in a small area, the rag can also be patched with a new filter cloth of the same material, and the hole filling method is to bond with silicone rubber mixture, as long as the use temperature and chemical properties of the binder are suitable for the process conditions; (3) Manually close the poppet valve of each chamber in turn, observe the chimney of the dust collector, if the poppet valve of which chamber is closed, and the dust emission of the chimney is significantly reduced, it means that the chamber is damaged; (4) Close the pulse valve and poppet valve of the room where the broken bag is located, open the inspection door, and determine the number and location of the broken filter bag.
With the continuous improvement of bag filter technology, especially the update of ash cleaning system technology and the continuous optimization of production process, the role of bag filter in cement plant is becoming more and more important. It has now been transformed from auxiliary equipment to host equipment, especially in the cement grinding system and pulverized coal preparation system has become a finished product collector, which plays a very important role in the quality of cement and pulverized coal. The air box pulse bag filter (PPDC) has the advantages of high ash cleaning efficiency, simple structure, easy replacement of filter bags, high dust concentration at the inlet and low emission concentration at the outlet, and it is now the mainstream dust removal equipment of cement plants.
Air leakage of electromagnetic pulse valve is a common fault of air box pulse bag filter, and the reasons for the failure are: (1) The diaphragm of the electromagnetic pulse valve is damaged. At this time, all the pulse valves of the dust collector do not work, the pressure of the air bag is rapidly reduced to zero, the cylinder is closed, the pressure difference of the dust collector continues to increase, and the ventilation volume is rapidly reduced; (2) The air pressure balance hole of the electromagnetic pulse valve is blocked.
The blockage of the air pressure balance hole of the electromagnetic pulse valve is mainly caused by two reasons: (3) the compressed air contains more oil and water; When installing compressed air pipes, foreign substances such as rust and welding slag were not cleaned of the pipes.
2. If the compressed air contains more oil stains and water, it is easy to cause water accumulation in the cylinder, air leakage of the pulse valve, reduction of the overair pressure of the pneumatic triplet and non-working of the two-way valve of the cylinder. Therefore, the quality of compressed air is the key to the stable operation of the air box pulse bag filter. To deal with this problem, install a refrigerated gas dryer at the outlet of the air compressor, or install a gas filter with a replaceable filter element at the inlet of the dust collector gas tank, drain the water regularly and check the pressure difference of the gas filter, and replace the filter element when the pressure loss is reached.
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Anonymous users2024-02-13A small amount of air leakage is not in the way, if there are two major air leaks, you can consider the problem of cylinders or seals, depending on the actual situation.
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Anonymous users2024-02-12I don't know what you're asking about, leaky chamber smoke or compressed air?
The difference between an airbox pulse bag filter and a jet bag filter: >>>More
The mechanical vibrating bag filter has a unique appearance, compact structure, good ash cleaning effect, and more practical installation space. The mechanical vibrating bag dust collector comprises a dust collector shell, a flower plate and a plurality of rapping rods and cloth bags, an air inlet is opened in the middle part of one side of the dust collector shell, an air outlet is opened in the upper part of the other side, an ash cleaning door is opened at the bottom of the dust collector shell between the air inlet and the air outlet, a flower plate is installed in the dust collector, the flower plate is installed between the air inlet and the air outlet and the dust collector is divided into dust removal area and exhaust area, the upper end of a plurality of beating rods and cloth bags is installed on the flower plate, it also comprises: crank mechanism, a beating frame and a pendulum rod, The lower end of a plurality of vibrating rods and cloth bags is equipped with a vibrating frame, a plurality of beating rods and cloth bags are inserted in the beating frame, the top of the beating frame is fixed on the wall of the dust collector by two pendulum rods, one side of the beating frame is connected with the crank mechanism, and the mechanical vibrating bag dust collector has the advantages of good dust removal effect, will not cause secondary pollution to the environment and directly protects the health of workers. >>>More
Pulse solenoid valve isPulse baghouse
The key components can be called the "heart" of the pulse bag filter, and its performance directly affects the operation of the dust collector. Air leakage is one of the common faults of pulse solenoid valves. Once there is a pulse solenoid valve leakage, the air pressure of the air distribution bag drops rapidly, all the pulse valves of the dust collector cannot work, the operating resistance of the dust collector continues to increase, and the ventilation volume decreases rapidly. >>>More
A dust collection hood is set up in each ash place, and the dust-containing gas is transported to the dust removal device through the pipeline gas path, in which the dust is collected in the dust removal device after the gas-solid separation is carried out, and the clean gas is introduced into the main pipe or directly discharged into the whole set of equipment into the atmosphere, that is, the dust removal system, and the dust collector is an important part of the system. From the perspective of ventilation and dust removal, dust is all solid small particles that can float in the air for a long time, and is a dispersion system, called aerosol, in which air is the dispersed medium and solid particles are the dispersed phase. A dust collector is a device that separates these small solid particles from aerosols.
A dust collection hood is set up in each ash place, and the dust-containing gas is transported to the dust removal device through the pipeline gas path, in which the dust is collected in the dust removal device after the gas-solid separation is carried out, and the clean gas is introduced into the main pipe or directly discharged into the whole set of equipment into the atmosphere, that is, the dust removal system, and the dust collector is an important part of the system. From the perspective of ventilation and dust removal, dust is all solid small particles that can float in the air for a long time, and is a dispersion system, called aerosol, in which air is the dispersed medium and solid particles are the dispersed phase. A dust collector is a device that separates these small solid particles from aerosols.