3.2 Selection of Lining Structure
3.2.1 Heat-insulating and abrasion-resistant linings shall be classified into the following types based on the lining structures and performance of lining concrete:
1 Double layer heat-insulating and abrasion-resistant lining with hexmesh［Figure 3.2.1（a）］；
2 Single layer abrasion-resistant or highly abrasion-resistant lining with hexmesh［Figure 3.2.1（b）］；
3 Double layer heat-insulating and abrasion-resistant lining without hexmesh［Figure 3.2.1（c）］；
4 Single layer heat-insulating and abrasion-resistant lining without hexmesh［Figure 3.2.1（d）］；
5 Single layer abrasion-resistant or highly abrasion-resistant lining without hexmesh［Figure 3.2.1（e）］.
3.2.2 Single layer heat-insulating and abrasion-resistant lining without hexmesh should be used as the lining structure for the following reactor generator system equipment:
1 Regenerator；
2 Coke combustor and withdrawal well；
3 Catalyst cooler；
4 Y-shaped position of reactor riser；
5 Third-stage cyclone/separator.
3.2.3 Double layer heat-insulating and abrasion-resistant lining with hexmesh should be used as the lining structure for the following reactor generator system equipment:
1 Orifice chamber；
2 Cold wall dipleg；
3 Slide valve；
4 Cold wall cyclone/separator.
Figure 3.2.1 Heat-insulating and Abrasion-resistant Lining Structures
1—Heat-insulating concrete；2—Cylindrical anchor；3—End plate；4—Hexmesh；5—Abrasion-resistant/highly Abrasion-resistant concrete；6—Ω-anchor；7—Metal Reinforcing fiber；8—Heat-insulating and abrasion-resistant concrete；9—Stud bolt；10—Y-anchor；11—V-anchor；12—S-anchor；13—Ring anchor
3.2.4 Double layer heat-insulating and abrasion-resistant lining with hexmesh should be used and single layer heat-insulating and abrasion-resistant lining without hexmesh may be also used as the lining structure for the following reactor generator system equipment:
1 Reactor（disengager）；
2 Reactor riser；
3 Standpipe；
4 Flue duct.
3.2.5 Single layer highly abrasion-resistant lining with hexmesh should be used as the lining structure for the following reactor-regenerator system equipment，operating conditions and similar positions:
1 Hot wall cyclone；
2 Hot wall dilute phase pipe；
3 Hot wall dipleg.
3.2.6 Single layer highly abrasion-resistant lining without hexmesh shall be used as lining structure for the following locations subject to erosion due to high gas speed:
1 Air distribution pipes or distribution plates；
2 Thermowells of reactor riser.
3.2.7 For the locations subject to severe erosion such as outlet of slide valve，double layer heat-insulating and abrasion-resistant lining with hexmesh shall be used，highly abrasion-resistant concrete shall be used for the abrasion-resistant lining，and the thickness of abrasion-resistant lining shall be increased.