Reinforcing, bonding and fixing structure for lining of glass fiber reinforced plastic DCH rectifying tower
By using fiberglass lining to strengthen the bonding and fixing structure in the DCH distillation tower, the peeling and weld cracking of the lining layer under high pressure and high temperature conditions is solved, the stability and safety of the tower kettle are improved, and maintenance is reduced cost.
Patent Information
- Application Number
- CN202420544940.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-03-20
AI Technical Summary
The fiberglass lining of the existing DCH distillation tower is prone to peel off and weld cracks under high pressure and high temperature conditions, resulting in material leakage, increasing maintenance costs and affecting the safe and stable operation of the equipment.
The inner lining of the fiberglass DCH distillation tower is strengthened, including the inner lining layer, rivet block, adhesive layer, structural layer and outer surface layer. By changing the tower kettle production process, PFA material and glass wire cloth are used to enhance the inner lining Fixability and strength of the layer.
It effectively prevents the peeling of the inner lining layer from the fiberglass layer, enhances the stability and safety of the tower kettle, reduces maintenance costs, and ensures the stable operation of the equipment for a long period of time.
Smart Images
Figure CN222510685U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a DCH distillation tower lining, in particular to a glass fiber reinforced plastic DCH distillation tower lining reinforcement bonding fixing structure. Background Art
[0002] The main equipment of Binhua Group's 75,000 tons / year glycerol-based epichlorohydrin unit includes three DCH distillation towers ABC, which are made of FRP lining PFA material. When under negative pressure of -95KPa and working temperature of 115℃ (normal operating conditions), the PFA lining layer peels off, the PFA material welds crack, the annular support ring of the tower kettle deforms, and the material leaks into the FRP layer. Among the three DCH distillation towers ABC in Binhua Group's epichlorohydrin unit, two DCH distillation towers AB have slight leakage in the kettle, and the kettle of the other DCH distillation tower C is seriously corroded. The three towers need to be shut down for maintenance for more than 3 months each year, and each maintenance requires entering the confined space to clean the 52 tons of ceramic bulk fillers in the tower, which seriously affects the safe and stable operation of the DCH distillation system. Utility Model Content
[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a glass fiber reinforced plastic DCH distillation tower lining reinforcement bonding and fixing structure, which effectively solves the problems mentioned in the above background technology.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: the utility model comprises a distillation tower body, a butterfly head provided at the bottom end of the distillation tower body, a bottom pipe mouth section provided at the bottom of the butterfly head, a packing support ring section provided above the bottom pipe mouth section, a packing section provided above the packing support ring section, an inner wall provided inside the distillation tower body, and a support ring provided on the inner side of the packing support ring section, and also comprises an inner lining reinforcement structure, and an inner lining reinforcement structure is provided on the outer side of the inner wall;
[0005] The lining reinforcement structure includes an inner lining layer, a rivet block, an adhesive layer, a structural layer and an outer surface layer. The inner lining layer is arranged on one side of the inner wall, the adhesive layer is arranged on one side of the inner lining layer, a plurality of rivet blocks are arranged on the adhesive layer, the structural layer is arranged on one side of the adhesive layer, and the outer surface layer is arranged on the outer side of the structural layer.
[0006] Preferably, the lining layer and the rivet block are both made of PFA material.
[0007] Preferably, the bonding layer is formed by wrapping and bonding the FRP base layer.
[0008] Preferably, the surface of the bonding layer is coated with high temperature resistant D470-400 resin.
[0009] Preferably, the support ring is solidly made of fiberglass.
[0010] Preferably, the structural layer is paved with glass cloth.
[0011] Beneficial effects: The utility model has a novel structure and ingenious conception. At present, the DCH distillation tower kettle structure optimization and transformation has been put into use for one year and six months; at present, there is no cracking in the kettle weld, no bulging or peeling of the lining, and the maintenance cost is reduced. Before the transformation, the maintenance cost was 1.06 million yuan, not counting the parking loss and other construction costs. The above equipment structure optimization and transformation has been put into use, reducing the equipment maintenance cost, ensuring the safe and long-term stable operation of the equipment, and reducing the parking loss time by more than 2 months each year. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0014] Figure 2 It is a schematic diagram of the lining reinforcement structure of the utility model;
[0015] Figure 3 It is a three-dimensional structural schematic diagram of the lining reinforcement structure of the utility model;
[0016] Numbers in the figure: 1. distillation tower body; 2. butterfly head; 3. bottom pipe mouth section; 4. packing support ring section; 5. packing section; 6. inner wall; 7. support ring; 8. lining reinforcement structure; 9. lining layer; 10. rivet block; 11. bonding layer; 12. structural layer; 13. outer surface layer. DETAILED DESCRIPTION
[0017] The following is combined with Figure 1-3 The specific implementation modes of the present utility model are further described in detail.
[0018] Embodiment 1, by Figure 1-3 The utility model provides a glass fiber reinforced plastic DCH distillation tower lining reinforcement bonding fixing structure, including a distillation tower body 1, a butterfly head 2 arranged at the bottom end of the distillation tower body 1, a bottom pipe mouth section 3 arranged at the bottom of the butterfly head 2, a packing support ring section 4 arranged above the bottom pipe mouth section 3, a packing section 5 arranged above the packing support ring section 4, an inner wall 6 arranged inside the distillation tower body 1, and a support ring 7 arranged on the inner side of the inner wall 6 located on the inner side of the packing support ring section 4, and also includes a lining reinforcement structure 8, and the outer side of the inner wall 6 is provided with the lining reinforcement structure 8;
[0019] The lining reinforcement structure 8 includes an inner lining layer 9, a rivet block 10, an adhesive layer 11, a structural layer 12 and an outer surface layer 13. The inner lining layer 9 is arranged on one side of the inner wall 6, the adhesive layer 11 is arranged on one side of the inner lining layer 9, a plurality of rivet blocks 10 are arranged on the adhesive layer 11, the structural layer 12 is arranged on one side of the adhesive layer 11, and the outer surface layer 13 is arranged on the outer side of the structural layer 12.
[0020] The inner lining layer 9 and the rivet block 10 are both made of PFA material, which facilitates the use of the inner lining layer 9 and the rivet block 10 .
[0021] The bonding layer 11 is formed by wrapping the FRP base layer, so as to facilitate bonding.
[0022] The surface of the bonding layer 11 is coated with high temperature resistant D470-400 resin for ease of use.
[0023] The support ring 7 is padded with full glass fiber reinforced plastic. Compared with the repair by pasting a plate, the support ring 7 can avoid the risk of gaps between the weld and the glass fiber reinforced plastic.
[0024] The structural layer 12 is paved with glass cloth, so that the structural layer 12 has good strength.
[0025] Working principle: When the utility model is used, the tower kettle manufacturing process is changed, first prefabricate the bottom sealing PFA plate → weld the gap of the spliced PFA plate → pass the electric spark test → prefabricate the PFA rivet block 10 and the prefabricated rivet block 10 inlay layer → overall brushing high temperature resistant D470-400 resin → wind / lay glass fiber cloth in sequence → until the designed thickness, change the tower kettle inner lining layer 9 fixing and strengthening process, so that the inner lining layer 9 is fixed by the PFA rivet block 10 to prevent peeling from the glass fiber reinforced plastic layer, and the PFA lining and the glass fiber reinforced plastic layer are closest. The minimum peel strength is not less than 5N / mm2. The annular support structure support ring 7 of the new head is padded with full fiberglass. The original design was filled with foamed polyurethane. Compared with the repair with pasting plates, the new head can avoid the risk of gaps between the weld and the fiberglass, and overlap the old and new equipment. The cylinder extension section of the tower kettle is made of mechanical winding as the main method combined with felt cloth as the auxiliary method. The head is made of manual laying method combined with felt cloth. The pipe reinforcement, cylinder and head connection reinforcement and other areas are all made by manual layer-by-layer laying and secondary bonding method.
[0026] Beneficial effects: The utility model has a novel structure and ingenious conception. At present, the DCH distillation tower kettle structure optimization and transformation has been put into use for one year and six months; at present, there is no cracking in the kettle weld, no bulging or peeling of the lining, and the maintenance cost is reduced. Before the transformation, the maintenance cost was 1.06 million yuan, not counting the parking loss and other construction costs. The above equipment structure optimization and transformation has been put into use, reducing the equipment maintenance cost, ensuring the safe and long-term stable operation of the equipment, and reducing the parking loss time by more than 2 months each year.
[0027] Finally, it should be noted that the above is only a preferred implementation case of the utility model, and is not limited to the case of the utility model. Although the utility model is described in detail with reference to the above implementation cases, for those skilled in the art, they can still modify the technical solutions recorded in the above implementation cases, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A glass fiber reinforced plastic DCH distillation tower lining reinforcement bonding fixing structure, comprising a distillation tower body (1), a butterfly head (2) arranged at the bottom end of the distillation tower body (1), a bottom pipe mouth section (3) arranged at the bottom of the butterfly head (2), a packing support ring section (4) arranged above the bottom pipe mouth section (3), a packing section (5) arranged above the packing support ring section (4), an inner wall (6) arranged inside the distillation tower body (1), and a support ring (7) arranged on the inner side of the inner wall (6) and the packing support ring section (4), characterized in that: It also includes a lining reinforcement structure (8), and the outer side of the inner wall (6) is provided with the lining reinforcement structure (8); The lining reinforcement structure (8) comprises an inner lining layer (9), a rivet block (10), an adhesive layer (11), a structural layer (12) and an outer surface layer (13); the inner lining layer (9) is arranged on one side of the inner wall (6); the adhesive layer (11) is arranged on one side of the inner lining layer (9); a plurality of rivet blocks (10) are arranged on the adhesive layer (11); the structural layer (12) is arranged on one side of the adhesive layer (11); and the outer surface layer (13) is arranged on the outer side of the structural layer (12).
2. A glass fiber reinforced plastic DCH distillation tower lining reinforcement bonding and fixing structure as claimed in claim 1, characterized in that: The inner lining layer (9) and the rivet block (10) are both made of PFA material.
3. A glass fiber reinforced plastic DCH distillation tower lining reinforcement bonding and fixing structure as claimed in claim 1, characterized in that: The bonding layer (11) is formed by wrapping and bonding the FRP base layer.
4. A glass fiber reinforced plastic DCH distillation tower lining reinforcement bonding and fixing structure as claimed in claim 1, characterized in that: The surface of the bonding layer (11) is coated with high temperature resistant D470-400 resin.
5. A glass fiber reinforced plastic DCH distillation tower lining reinforcement bonding and fixing structure as claimed in claim 1, characterized in that: The support ring (7) is solidly made of glass fiber reinforced plastic.
6. A glass fiber reinforced plastic DCH distillation tower lining reinforcement bonding and fixing structure as claimed in claim 1, characterized in that: The structural layer (12) is formed by laying glass fiber cloth.