|Industrial dust treatment equipment series|
|Welding fume exhaust gas treatment series|
|Grinding polishing dust removal equipment|
|Stand-alone dust collector|
|Spiral duct and accessories series|
How to choose bag dust collector equipment?
The filtration speed of bag dust removal equipment is affected to varying degrees by the following factors: ash removal method, ash removal system, dust characteristics, filter characteristics, predetermined equipment resistance, and crowd dust concentration.
Under the following conditions, a higher filtration speed can be adopted: using strong dust removal methods (such as pulse blowing), the dust removal cycle is short, the inlet dust concentration is low, the dust particles are large, the viscosity is small, and normal temperature dust-containing gas is processed Needle felt filter material or membrane material.
Under the following conditions, a lower filtration speed should be used: Weak dust removal (such as back blowing dust removal, vibration dust removal) for high temperature flue gas. Fine and sticky dust, low density, high inlet dust concentration, required dust removal concentration Low. Use of plain cloth, glass fiber and other filter materials requires long service life of the filter bag.
Selection of box structure design:
The box structure of the bag type dust removal equipment mainly includes the box (clean room, dust room, ash hopper), filter element (filter bag, filter bag holder), ash cleaning device, ash discharge conveyor, and safety maintenance facilities.
The compressive strength of the box should be able to withstand the system pressure. Under normal circumstances, the negative pressure is 1. ..%. 2 ... of the total pressure on the nameplate of the induced draft fan, calculated according to + 6000 pa pressure intensity.
The layout of the service door follows the principles of convenient paths and easy maintenance. The thickness of the flower plate is generally not less than 5 mm, and it should be able to withstand the pressure difference on both sides, the weight of the filter bag and the maximum dust load after reinforcement. The design of the flower bag of the large bag filter must consider the thermal deformation. The distance between the center of the pocket hole on the edge of the flower plate and the side plate of the box should be greater than the hole diameter. The cross-section wind speed of the clean air chamber should not be greater than 4 ~ 6m / S.
How to choose bag dust collector equipment? The structure, support and foundation design of bag filter equipment should consider dead load, live load, wind load, snow load, maintenance load and seismic load, and design according to the dangerous combination.
Small-sized bag-type dust collectors should be made into wholes and ash buckets for shipment according to the transportation conditions. For large- and medium-sized bag-type dust collectors assembled on site, the main components are processed at the manufacturing plant into units of limited size for road and rail transportation, Identification and packaging, then shipped to the site.
The steel shell of general large bag dust removal equipment can be designed with standard modules, and each silo is a single vertical filter unit. It can be designed into two types: standard type and user type: assembled into a unit box in the factory and shipped to the current site. This is the so-called standard type. After the main components such as the housing are manufactured in the factory, they are assembled on-site, called User ...
The design of large high-temperature bag filters must consider the elimination of overall thermal stress and expansion deformation of the material.
The compressive strength of the ash bucket should be designed to be 120% of the full pressure of the fan under full load conditions, and it can withstand the system pressure and ash accumulation for a long time. The volume of the ash hopper should consider the ash storage amount during the maintenance of the ash conveying equipment. In addition to the single bag filter equipment, the ash bucket should be provided with an access door. Measures should be taken to prevent the ash discharge port from being blocked when the filter bag falls off and damage the ash discharge equipment. A manual plug-in valve should be installed between the ash discharge valve and the ash hopper. When dealing with easily-condensable smoke or collecting high-viscosity dust, a level meter, heating and insulation device and arch breaking device should be set in the ash hopper. The ash bucket level gauge and the arch breaking device should not be set on the same side. The ash discharge equipment should meet the technical requirements of mechanical and electrical products, meet the requirements of the maximum ash discharge, ensure that the ash bucket locks the air, and prevent dust from escaping from the outside.
How to choose bag dust collector equipment? Design of high-temperature bag filter
1. Selection of filter material and determination of operating temperature
For high-temperature flue gas purification, there are two options for bag filter materials:
1) Flue gas cooling, using normal temperature filter material;
2) Use high-temperature filter media without cooling, or the flue gas is cooled to a certain extent, use high-temperature-resistant filter media. Determined after technical and economic comparison.
What needs to be considered is that flue gas cooling will increase equipment investment and operating costs, but the price of dust collector equipment and room temperature filter material is relatively suitable. If the flue gas is not cooled, due to the large flue gas flow under working conditions, the scale of the dust collector equipment will be Expansion. In addition, the price of high-temperature filter materials will increase investment, but the purchase cost and operating cost of the cooler will be saved.
Pay special attention to the dew point of the flue gas. The lower limit of the operating temperature should be 15 ~ 201 ° C higher than the dew point of the flue gas to ensure the safe operation of the bag filter equipment.
2. Structural design of high-temperature bag filter
钢结构的热膨胀和热应力的消除，在大型袋式除尘设备的设计中尤为重要.可按钢结构设计规范加工。 When designing the equipment body of the high-temperature bag dust removal equipment, the thermal expansion and thermal stress of the steel structure must be eliminated, which is particularly important in the design of large bag dust removal equipment. It can be processed according to the steel structure design specifications.
How to choose bag dust collector equipment? Another important issue is insulation. The thermal insulation method, thermal insulation material and thermal insulation thickness of the bag filter equipment should be determined according to the process strip, the required thermal insulation effect, weather conditions and the surrounding environment. The thermal insulation design should have measures to prevent rainwater penetration. In addition to heat insulation, ash hoppers often require heat tracing measures.
Related recommendation: Working principle of bag dust removal equipment
How to choose more bag filter equipment? 查询更多！ , Welcome to Yuchen Dust Removal Equipment Manufacturer for more information!