Column-box-cage ladder (or stair platform)-ceiling-clean room-ash hopper (except air grid and positioning plate)-handrail-ash cleaning switching system-(installation of filter bag)-pre-installed injection system-reinstalled injection pipe-clean room cover plate-inlet and outlet flue header-bypass system

Note: after installing the column, whether to install the box or the ash hopper first depends on the installation conditions on site, and sometimes several processes can be carried out at the same time. ?

(2) Installation requirements? 1? Column?

1. 1 column spacing deviation: when the column spacing is less than or equal to10m, the installation deviation is not greater than 5mm, and when the column spacing is greater than10m, the installation deviation is not greater than 7 mm?

1.2? Diagonal deviation: When the diagonal dimension is less than 20m, the installation deviation is not more than 7mm；; When it is more than 20m, the installation deviation is not more than 9mm. ?

1.3? Vertical column plumb sag deviation: no more than 5 mm, vertical column top elevation deviation: 0 m 5 mm; Elevation deviation at the top of each column: no more than 5 mm; Each column top deviation of 3 mm?

2? Box? 2. 1? Assembly of boxes?

2. 1. 1? The welding requirements of the inner plate and the cross beam are firm and tight. After welding, check the size, shape and weld quality according to the drawings, and make records. ?

2. 1.2? Straightness of column: not more than 5 mm flatness of wallboard: 10 mm? 2. 1.3? Is the verticality of the column ends and channel ends at the upper and lower ends of the wallboard to the column center line 3 mm? 2. 1.4? The residual height of the weld on the inner surface of the inner plate is less than 2mm. Smooth polishing. ? 2.2? Installation of the shell?

2.2. 1? The shell must be vertical and square, and all dimensions must meet the requirements of the drawings. ? 2.2.2? After adjustment, the deviation between columns shall not exceed 3mm. ? 2.2.3? Vertical sag deviation of column: no more than 3mm. ? 2.2.4? The flatness of the top frame of the shell: no more than 3mm. ?

2.2.5? Horizontal stiffening rib (flat steel) should be locked with flatness not greater than 2mm, and vertical deviation of vertical stiffening rib (channel steel) should not be greater than 2mm. ?

2.2.6? Installation of air distributor: Before installation, carefully measure the size between the upper and lower frames and draw the installation line to ensure the installation angle of the distribution plate. Install the locating plate of the distributor as shown in the figure. ?

2.3? Welding of the shell?

2.3. 1? Bag filter is fully welded internally and intermittently welded externally. ?

2.3.2? All welds must be tested for kerosene leakage, and there shall be no false welding or missing welding. After welding, the joint should be inspected immediately to ensure that the overall final air leakage rate does not exceed 3%. ?

3? Clean room?

The verticality of clean air room is 65438±0mm；; ; The horizontal diagonal of the clean room is 8 mm; The flatness of clean air chamber is less than or equal to 4 mm? The installation of the flower board is an important step, which directly affects the progress of the follow-up work. Lift, install and position the whole ceiling. In addition, special attention should be paid to the splicing weld in the middle of the four holes, and there should be no deviation along the weld direction, and the reinforced flat steel should not be broken. ?

3. 1? Flower board installation?

The flower board is made of several pieces by splicing and welding, and preventing the welding deformation of the flower board is the key technology. Assembly welding, post-welding shaping and leak detection must be carried out on the large flat plate of the construction site. Anti-deformation measures such as symmetrical welding and skip welding must be taken for the upper and lower stiffening ribs of the ceiling. ?

3. 1. 1? Before lifting the suspended ceiling, check the perforation and flatness of the center line of the four corners of each suspended ceiling according to the drawings, and the flatness is not greater than11000. ?

3. 1.2? The allowable deviation of the spacing between rows of holes in the ceiling is 0.2mm?

3. 1.3? First spell the central flower board to ensure that the holes of the flower board are parallel and centered. ?

3. 1.4? Then installing adjacent flower boards; Before welding, it is important to check the row spacing between adjacent holes of two butt welding plates. The allowable deviation is less than 0.3mm, and the diagonal error of the center of long-distance four-corner hole is less than1mm. At this time, the installation error must be corrected. Make a good record. ?

3. 1.5? The welding of the flower board should first be peripheral and then butt joint. ? 3.2? Indoor and outdoor frame installation of clean room?

3.2. 1? Before installing the clean air inner frame, check whether the holes in the ceiling can be aligned. After confirmation, assemble the inner panel frame (fixed by spot welding first), then position it on the ceiling, and then determine whether the verticality, flatness and horizontal diagonal of the whole frame meet the installation requirements. After confirmation, carry out spot welding. After the clean room panel is installed, install the angle steel (75× 75× 5) frame to stabilize the whole inner panel frame, and then install the pillars of the clean room positioning slot, the cover plate positioning slot, and the wind room insulation materials.