1 scope
This technology standard is suitable for using common sheet steel, is applied to the general civil and industrial construction dust removal system and filter production and installation of boiler dust removal system engineering.
2 construction preparation
2.1 material requirements and main machines:
2.1.1 the main material used should have qualified certificate or qualification documents, leaving the board should be alternated even and smooth surface.
2.1.2 filter made of thickness shall be carried out according to the design requirements, standard sample material list.
2.1.3 gantry cutting machine, shearing machine, roll round machine, vibration type curve steel cutting machine, Angle steel roll round machine, punching machine, bench drill, electric welding equipment, paint spraying, hoist, chain hoist, wrench, spirit level, line drop, etc.
2.2 operation conditions:
2.2.1 filter production should be spacious, bright and clean, the ground is flat and level, not wet workshop.
2.2.2 processing site should have corresponding processing machines and tools, facilities and power safety protective equipment, fire equipment, etc.
2.2.3 filter production should be design drawings, details, and the builder written technical, quality, safety disclosure.
2.2.4 has installed condition the civil engineering construction, accessibility and sundry.
3 operation process
3.1 process:
The flange welding
Acquisition - check - amplified sample - the material - the circle round - assembly - -
The welding parts
To molding, painting and inspection to the factory, installation
3.2 marking tool commonly used steel ruler, square, row, row needle, the rush. Sample request separately according to different types of filter lofting.
3.3 plate shear must first do a check size, in order to avoid wrong, according to the size of line shape with cutting machine and vibration shear to shear.
3.4 outside or rectangular cylinder diameter size deviation should not be greater than 5 ‰, allowed its inside and outside surface should be smooth, uniform radian.
3.5 filter shell mosaics should level off, longitudinal flat-fell seam should be staggered; The part of the flange joint and is equipped with inspection door should be tight. Air leakage rate of the whole filter, under pressure from design work was 5%, including centrifugal precipitator was 3%.
Swirl around 3.6 roll round, pay attention to the direction, so that in the wrong direction.
3.7 import and export of the filter assembly should be straight, simplified discharge tube and the cone should be coaxial, the eccentric shall not be greater than 2 mm.
Short cyclone inlet pipe should be 3.8 and simplified the lining as the tangent direction; Spiral guide plate should be perpendicular to the simplified, pitch should be uniform.
3.9 after welding should be first period of the brazen full welding, to avoid deformation after welding.
3.10 dust catcher should be anticorrosive paint is brushed outside two times after molding, mixed paint brush gray again.
3.11 filter installation, the installation manner according to the instruction manual, find is leveling. Induced draft fan inlet to join filter core tube flange (i.e., to purify the gas export), induced draft fan outlet connection to flue by chimney discharged into the atmosphere, do not pick up.
3.12 installation connected by flange sealing pad should be added in the inside of the bolt, to ensure the seal.
3.13 dust catcher spiral direction to be the same as that of spiral fan, namely right-lateral precipitator with dextral induced draft fan, levorotatory precipitator with sinistral induced draft fan.
3.14 connecting the main body with the ox horn cone assembly filter large flange and ox horn cone of the small flange with ash storage tank must ensure that the sealing flange connection.
4 quality standards
4.1 ensure projects:
4.4.1 filter specification and size must comply with the design requirements.
Inspection methods: observation check and quantity of the feet.
4.1.2 filter assembly and the joint of various components must be tight, import and export direction must comply with the design requirements.
Inspection method: to observe the examination.
4.2 the basic items:
2 filter to make the inner surface level off, without concave and convex, uniform circular arc, flat-fell seam stagger; No weld surface defects such as cracks, slag inclusion, sand holes, porosity.
Inspection method: to observe the examination.
Activity of 4.2.2 filter or rotating parts should be flexible and reliable, elastic moderate.
Test method: hand dynamic inspection.
4.3 allowable deviation projects:
Filter installation and inspection methods shall comply with the allowable deviation table 4-32.
Filter installation and test the allowable deviation method table 4-32
Will project allow deviation (mm) test method
10 use theodolite or stay, 1 horizontal displacement quantity check
High standard plus or minus 10 with level 2 or level, ruler, drawing and quantity check
3 verticality messenger wire feet 2 per 1 meter quantity check
Total deviation 10
5 finished product protection
5.1 dust catcher of finished product should be placed neatly capacious, dry place.
5.2 dust handling loading and unloading to should take put down gently, to prevent damage to the finished product.
6 should pay attention to quality problems
6.1 filter production should pay attention to quality problems are shown in table 4-33.
Table 4 -
Serial number quality on disease prevention measures
1 exhaust pipe and cylinder connections uneven when circle round with a variety of samples for paragraphs radian
2 core spiral vane Angle incorrect assembly welding and inspection
7 quality records
7.1 filter assembly at the scene, air conditioning air leakage test record.
7.2 dust production and installation of engineering quality inspection evaluation table.
This technology standard is suitable for using common sheet steel, is applied to the general civil and industrial construction dust removal system and filter production and installation of boiler dust removal system engineering.
2 construction preparation
2.1 material requirements and main machines:
2.1.1 the main material used should have qualified certificate or qualification documents, leaving the board should be alternated even and smooth surface.
2.1.2 filter made of thickness shall be carried out according to the design requirements, standard sample material list.
2.1.3 gantry cutting machine, shearing machine, roll round machine, vibration type curve steel cutting machine, Angle steel roll round machine, punching machine, bench drill, electric welding equipment, paint spraying, hoist, chain hoist, wrench, spirit level, line drop, etc.
2.2 operation conditions:
2.2.1 filter production should be spacious, bright and clean, the ground is flat and level, not wet workshop.
2.2.2 processing site should have corresponding processing machines and tools, facilities and power safety protective equipment, fire equipment, etc.
2.2.3 filter production should be design drawings, details, and the builder written technical, quality, safety disclosure.
2.2.4 has installed condition the civil engineering construction, accessibility and sundry.
3 operation process
3.1 process:
The flange welding
Acquisition - check - amplified sample - the material - the circle round - assembly - -
The welding parts
To molding, painting and inspection to the factory, installation
3.2 marking tool commonly used steel ruler, square, row, row needle, the rush. Sample request separately according to different types of filter lofting.
3.3 plate shear must first do a check size, in order to avoid wrong, according to the size of line shape with cutting machine and vibration shear to shear.
3.4 outside or rectangular cylinder diameter size deviation should not be greater than 5 ‰, allowed its inside and outside surface should be smooth, uniform radian.
3.5 filter shell mosaics should level off, longitudinal flat-fell seam should be staggered; The part of the flange joint and is equipped with inspection door should be tight. Air leakage rate of the whole filter, under pressure from design work was 5%, including centrifugal precipitator was 3%.
Swirl around 3.6 roll round, pay attention to the direction, so that in the wrong direction.
3.7 import and export of the filter assembly should be straight, simplified discharge tube and the cone should be coaxial, the eccentric shall not be greater than 2 mm.
Short cyclone inlet pipe should be 3.8 and simplified the lining as the tangent direction; Spiral guide plate should be perpendicular to the simplified, pitch should be uniform.
3.9 after welding should be first period of the brazen full welding, to avoid deformation after welding.
3.10 dust catcher should be anticorrosive paint is brushed outside two times after molding, mixed paint brush gray again.
3.11 filter installation, the installation manner according to the instruction manual, find is leveling. Induced draft fan inlet to join filter core tube flange (i.e., to purify the gas export), induced draft fan outlet connection to flue by chimney discharged into the atmosphere, do not pick up.
3.12 installation connected by flange sealing pad should be added in the inside of the bolt, to ensure the seal.
3.13 dust catcher spiral direction to be the same as that of spiral fan, namely right-lateral precipitator with dextral induced draft fan, levorotatory precipitator with sinistral induced draft fan.
3.14 connecting the main body with the ox horn cone assembly filter large flange and ox horn cone of the small flange with ash storage tank must ensure that the sealing flange connection.
4 quality standards
4.1 ensure projects:
4.4.1 filter specification and size must comply with the design requirements.
Inspection methods: observation check and quantity of the feet.
4.1.2 filter assembly and the joint of various components must be tight, import and export direction must comply with the design requirements.
Inspection method: to observe the examination.
4.2 the basic items:
2 filter to make the inner surface level off, without concave and convex, uniform circular arc, flat-fell seam stagger; No weld surface defects such as cracks, slag inclusion, sand holes, porosity.
Inspection method: to observe the examination.
Activity of 4.2.2 filter or rotating parts should be flexible and reliable, elastic moderate.
Test method: hand dynamic inspection.
4.3 allowable deviation projects:
Filter installation and inspection methods shall comply with the allowable deviation table 4-32.
Filter installation and test the allowable deviation method table 4-32
Will project allow deviation (mm) test method
10 use theodolite or stay, 1 horizontal displacement quantity check
High standard plus or minus 10 with level 2 or level, ruler, drawing and quantity check
3 verticality messenger wire feet 2 per 1 meter quantity check
Total deviation 10
5 finished product protection
5.1 dust catcher of finished product should be placed neatly capacious, dry place.
5.2 dust handling loading and unloading to should take put down gently, to prevent damage to the finished product.
6 should pay attention to quality problems
6.1 filter production should pay attention to quality problems are shown in table 4-33.
Table 4 -
Serial number quality on disease prevention measures
1 exhaust pipe and cylinder connections uneven when circle round with a variety of samples for paragraphs radian
2 core spiral vane Angle incorrect assembly welding and inspection
7 quality records
7.1 filter assembly at the scene, air conditioning air leakage test record.
7.2 dust production and installation of engineering quality inspection evaluation table.
No comments:
Post a Comment