The dust remover of 10T boiler is made of domestic advanced composite materials Glass Steel resin, corrosion resistance, high wear resistance, long service life, multi-function integration, small floor area, simple installation, no increase in power, low resistance, low water consumption, the spray system uses stainless steel 304 material to solve the corrosion resistance, high temperature resistance, wear resistance and other problems, Some practical problems existing in the wet desulfurization dust remover equipment have been solved in a relatively perfect way. The boiler dust removers produced by our factory are coal fired, oil fired boilers, coal water slurry boilers kiln , acid mist purification in metallurgical and chemical industries, thermal power plants cement It is an ideal environmental protection product that can be selected by the factory. The fuel is rice husk, sawdust, wood, coal and other boilers for desulfurization and dust removal. The 10 ton boiler dust remover series desulfurization and dust removal equipment solves the problems of high temperature resistance, corrosion resistance, water drift, black smoke, and desulfurization
Introduction to the protection principle of boiler bag type dust collector for dust removal bag:
(1) Resistance control of dust remover
The resistance of the precipitator is divided into two parts. The design resistance of this equipment is 1200Pa.
Part of it is the inherent resistance of the equipment (i.e. the original resistance), which is caused by various flue gas flow paths of the equipment.
Air inlet and outlet mode and air inlet of dust remover The Conduit Whether the flue gas flow rate of each part is properly selected; Air inlet uniformity of each chamber of the precipitator; Whether the design of diversion system is reasonable; Whether the horizontal height between the air inlet and the bottom of the filter bag leads to enough space for steady flow of dusty gas; Rationality of flue gas lifting speed between filter bags determined by filter bag diameter and filter bag spacing; The reasonable selection of outlet pipe wind speed will affect the inherent resistance value of the dust collector.
From the dust collectors designed and produced by our company in the past, the original resistance of the equipment is about 350Pa.
The second part is the running resistance of the equipment. The running resistance of the equipment is a circulating value caused by the thickness of the ash hanging layer formed on the filter bag surface during the operation of the precipitator. Generally, the upper limit of this value is set at 1000~1200Pa. When the equipment reaches this resistance value, the system starts dust removal, restores the equipment resistance to the original resistance, and enters the next cycle. The cycle time depends on the dust concentration of flue gas, the type and specification of filter material, etc.
According to the operation record of the boiler bag filter designed and produced by our company and put into operation, the cycle time is between 60~120min.
(2) Measures to prevent bag pasting
The bag pasting is one of the main reasons for the increase of the resistance of the precipitator, except for the structural design of the precipitator. The main reason for pasting the bag is the adhesion of water or oil on the powder layer at the filter bag part. To avoid pasting the bag, after pre spraying the dust remover at the beginning of operation, the dust remover PLC will control the dust remover to run the bypass before the smoke crosses the water mist point; Operate bypass during ignition and oil feeding; During operation, the flue gas temperature is too low, and the bypass is opened when oil is put into operation; Open the bypass channel when a large number of boiler tubes burst. The dust shall be completely removed after the dust remover is shut down. The above measures effectively prevent the occurrence of bag pasting.
(3) Bypass system
The bypass system is an important measure to ensure the safety of the boiler bag dust collector. The emergency signal can be activated in time through the control system.
Abnormal flue gas temperature: a temperature detector is installed on the main air inlet pipe of the dust remover. With the help of the flue gas temperature lower or higher than the set value, the bypass is automatically opened by PLC to prevent the filter bag from being blocked by condensation at low temperature or burned by high-temperature flue gas.
Boiler tube burst: if it is a small amount of tube burst, a small amount of moisture has little impact on a large amount of high-temperature flue gas, and the original ash layer on the surface of the filter bag can be wrapped, so it has no great impact on the bag filter. In case of a large number of tube bursts, large changes in water volume and water pressure, and abrupt changes in boiler system parameters, the system will respond accordingly and provide corresponding signals to the dedusting system at the same time. The boiler will also take relevant protective measures according to the boiler's operating procedures: when the deduster PLC receives the boiler tube burst signal, the PLC controls to open the bypass system; In addition, the boiler tube explosion will lead to the rise of flue gas temperature. At this time, the temperature detection device installed in the air inlet main will also play the role of opening the bypass system, and the dual protection will ensure the safety of the dust collector when the boiler tube explosion occurs.
(4) Filter bag leak detection device
As an important component of the protection system of the bag type dust collector, the filter bag leak detection device is indispensable in the operation of the dust collector. With the help of the filter bag leak detection device, the dust collector can check the pressure of the chamber at any time and the damage of the filter bag. Once the filter bag is damaged, immediately start the emergency signal to notify the maintenance to ensure the normal operation of the dust collector.
A. In order to adapt to the national conditions, reduce the cost, and ensure the use effect of the dust collector, we have specially designed the leakage detection device of the dust collector door The design and application in previous projects have achieved satisfactory results.
B. The filter bag leakage detection device of the precipitator in this case is mainly composed of a differential pressure gauge (one for each bin) and a differential pressure transmitter. Generally, a better indication of the performance of the dust collector is the pressure drop of the dust removal system. In particular, the pressure drop of a single filter chamber of the precipitator is a good indication of the condition of the filter bag. The sudden increase or decrease of the pressure drop means that the filter bag is blocked, leaking, the valve does not act, the ash cleaning system fails, or the ash hopper has too much ash.
Low pressure drop indicates that the system has leakage (filter bag is damaged).
Excessive pressure drop indicates many reasons: filter material blockage, ash cleaning system failure, air inlet and outlet valve failure, excessive ash deposition in ash hopper, and pipeline blockage of differential pressure gauge.
After the PLC obtains the abnormal signal sent by the differential pressure transmitter, it will close the fault compartment, and at the same time, it will display and start the emergency signal acousto-optic on the main control cabinet.
(5) Online detection (monitoring) equipment
In order to better protect the dust remover and realize online detection and monitoring of the dust remover, we have configured a series of online detection equipment for the dust removal system.
Temperature detector: it is used for online monitoring of flue gas temperature. When the index exceeds the set value, it starts the emergency signal and starts the dust remover protection device through PLC control;
Differential pressure gauge and transmitter: control the operation of the dust removal system of the dust remover through PLC, and analyze the dust removal effect and filter material life through the cycle time of the equipment working resistance and the overall differential pressure of the dust remover after each dust removal;
Material level meter: the high material level meter set on the ash hopper of the dust remover displays the ash storage in the ash hopper and commands the work of the ash unloading system and the ash conveying system through PLC.
The use of a series of protection technologies ensures the stable, continuous and safe automatic operation of the precipitator under the environmental conditions provided by you, and thus ensures the normal operation of the boiler.
The above product introductions are all actual cases of Tongyun Dust Removal. Our company is legally responsible for the authenticity of its content and can provide various continuous documentary and picture proofs. For any similar content website, please be careful to review it to avoid being cheated.
Hebei Maoshuo Environmental Protection Equipment Co., Ltd. provides follow-up service for the ex factory equipment. If any problems related to equipment quality occur within one year of normal use of the equipment, Hebei Maoshuo Environmental Protection Equipment Co., Ltd. will provide free service and reply within 12 hours. In case of emergency, we will arrive at the site within 48 hours for guidance.
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