CN219060747U - Plate armor anti-corrosion system structure with heat insulation and heat preservation performance - Google Patents
Plate armor anti-corrosion system structure with heat insulation and heat preservation performance Download PDFInfo
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- CN219060747U CN219060747U CN202223107031.6U CN202223107031U CN219060747U CN 219060747 U CN219060747 U CN 219060747U CN 202223107031 U CN202223107031 U CN 202223107031U CN 219060747 U CN219060747 U CN 219060747U
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Abstract
The utility model discloses a plate armor corrosion prevention system structure with heat insulation performance, which comprises a substrate, wherein the surface of the substrate is provided with a primer, and a fiber reinforced thermosetting polymer resin plate is fixed on one side of the substrate provided with the primer through an adhesive. The anti-corrosion system layer has better anti-corrosion capability, better thermal expansion resistance, cold contraction resistance and mechanical impact resistance, and particularly important, the anti-corrosion material has good heat insulation and heat preservation effects, avoids the tedious heat preservation work in the field use process, also avoids the loss and waste of materials in the heat preservation process, greatly saves the cost of each link in the heat preservation process, and greatly saves the potential safety hazard of the construction field caused by improper heat preservation.
Description
Technical Field
The utility model relates to a plate armor corrosion prevention system structure with heat insulation and heat preservation performance, in particular to a heat insulation and heat preservation thermoplastic plate and a special corrosion prevention system composed of the heat insulation and heat preservation thermoplastic plate and matched adhesives, and belongs to the technical field of corrosion prevention of building systems, equipment and the like.
Background
The corrosion prevention is an important problem faced by industrial and mining enterprises in China, along with the implementation of national environmental protection policies, a large number of thermal power plants are provided with desulfurization systems, and corrosion problems of equipment such as absorption towers, flues, slurry tanks, wet dust collectors and the like in desulfurization devices are very serious, and common glass flakes are corrosion-resistant and rubber-lined corrosion-resistant. Because glass flakes serve as an inner anti-corrosion layer and cannot serve as an insulation layer, an insulation layer is required to be coated on the outer side of the steel matrix in normal conditions. The heat preservation adopts rock wool, and heat preservation thickness is 50mm, is fixed highly for 3 meters generally to set up the bearing rest, then fix heat preservation cotton and outside backplate through heat preservation hook nail, outside backplate reuse paint color steel backplate, galvanized backplate or aluminium system backplate. However, in the past, the heat preservation backplate can produce backplate corruption along with the lapse of time, and the heat preservation hook nail corrosion drops the condition. If the guard board falls down due to corrosion, serious injury can be caused to equipment and pedestrians on the project site.
Therefore, the heat preservation is of great importance for equipment such as absorption towers, flues, wet dust collectors and the like, and the heat preservation is related to the use effect in the field of corrosion prevention and the safety problem in the later stage of the whole field. The method of glass flake corrosion prevention and rock wool heat preservation is conventionally adopted for the flue and the absorption tower, but in the practical application process, particularly the absorption tower severely corroded by chimney rain and a clean flue heat preservation guard plate between the outlet of the absorption tower and the chimney are severely corroded and decayed after being corroded for a plurality of years, so that a loosening phenomenon occurs. If the place of the project is in the condition of more extreme severe conditions, such as strong wind, dryness, sand storm and the like, the condition that the heat preservation guard board is blown off by the strong wind or rusted seriously and cannot play any heat preservation effect can occur, and meanwhile, great potential safety hazards are caused to personnel and equipment. Common conditions are: abrasion and corrosion of the heat-insulating guard board are caused by wind erosion; under the action of strong wind, the thermal insulation hook nails are loosened from the guard board, and the thermal insulation cotton is displaced; and the infiltration of rainwater and desulfurization acid liquor leads to corrosion of heat preservation cotton on the outer wall of the steel flue and the like.
The service life of the traditional anti-corrosion lining structure is usually 6-8 years, certain area maintenance and repair are needed each year, and the repaired anti-corrosion lining can not meet the use requirement, so that other hard materials and related coatings are adopted in the current power plant repair, but the two materials are also hard thick slurry anti-corrosion materials, and the problems of microcrack, local cracking, bubbling and falling off and the like are extremely easy to occur under larger temperature change stress.
The biggest problem is the site safety hazard caused by heat preservation. The bearing support and the heat-insulating hook nail in the heat-insulating layer are severely corroded, so that unnecessary trouble is brought to normal work on site, and the safety of site workers can be endangered once the heat-insulating hook nail is blown away by strong wind or suddenly falls down; the materials used for internal corrosion prevention also belong to inflammable and harmful volatile matters, a scaffold is required to be erected during replacement and maintenance, and frequent maintenance and regular replacement construction bring great safety management pressure to relevant parts of the power plant.
In addition, because bearing support and heat preservation hook nail in the heat preservation are corroded by the severity, need change the heat preservation, also need consolidate and repair welding to bearing support and the heat preservation nail that damages, and move the hidden danger that the fire will cause burn and have the conflagration to inside glass flake anticorrosive coating, anticorrosive material glass flake also belongs to inflammables, contains a large amount of volatile harmful substance, can bring the influence for workman's physical and mental health. Therefore, by combining the above characteristics, the existing heat insulation materials and the installation mode can generate major potential safety hazards to a certain extent, and the maintenance process of internal corrosion prevention and external heat insulation can bring high maintenance cost and personnel cost to the whole project.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the anti-corrosion structure for the carbon steel and concrete equipment and the building matrix is provided, so that the anti-corrosion effect of the matrix is ensured, and the heat preservation effect of the matrix is ensured.
In order to solve the problems, the technical scheme of the utility model provides a plate armor corrosion prevention system structure with heat insulation performance, which comprises a substrate, wherein the surface of the substrate is provided with a primer, and a fiber reinforced thermosetting polymer resin plate is fixed on one side of the substrate provided with the primer through an adhesive.
Preferably, the fiber reinforced thermosetting polymer resin sheet is formed by compounding a polymer foam layer and a fiber reinforcing agent. The structure has the characteristics of excellent integrity and heat preservation performance.
Preferably, the primer is an epoxy primer or a polyurethane primer.
Preferably, the adhesive is a polyurethane asphalt adhesive or an organic silica gel adhesive.
More preferably, the adhesive is a bingo adhesive.
Preferably, adjacent fiber reinforced thermosetting polymer resin plates are connected by an adhesive.
Preferably, the plate is a fiber-reinforced thermosetting polymer resin, and the heat conductivity coefficient of the plate is 0.14W/m.K at 25 ℃.
Preferably, the heat resistance of the armor is 7.14K/W at 25 ℃.
Preferably, the plate nail is a rectangle of dimensions 8mm thick, 120mm x 120 mm.
The fiber reinforced thermoplastic high polymer composite board is adopted to prepare the high polymer composite material, so that the high polymer composite material has more excellent flushing resistance, wear resistance and impact resistance in the corrosion prevention use process. And secondly, the plate armor also has a certain heat insulation function, the application range of the plate armor is that the temperature of the whole clean flue is far lower than the temperature of a chimney in the clean flue with lower temperature, and the heat insulation effect of the whole flue is enabled to reach the numerical requirement of the flue heat insulation standard by the lower heat conductivity coefficient. Finally, the plate armor system is arranged in the whole flue, the total resistance of the flue is not changed, namely, the plate armor in the flue has the effects of corrosion prevention and heat preservation, the efficiency of the fan is not influenced, and the energy efficiency of the whole project is not increased.
The modified heat-insulating thermoplastic plate A is adhered by an elastic adhesive to form a continuous corrosion-resistant system which integrates the primer, the adhesive, the fiber reinforced thermosetting polymer resin plate A and the matrix. The corrosion-resistant system can be kept stable for a long time in a wider range, is suitable for dry-wet alternation, high-low temperature change and the like, and has certain toughness, strength and excellent ductility. The plate armor system also has a certain heat insulation function, the project is clean flue gas, the thickness of the anti-corrosion layer of the plate armor system reaches 11mm, and the heat insulation performance is good according to the self heat conductivity, the flue gas temperature and the environmental temperature.
Compared with the prior art, the utility model has the beneficial effects that:
1) The modified heat-insulating thermoplastic plate A has good corrosion resistance and permeation resistance, has excellent performance in the existing practical project, does not need maintenance and repair, and greatly reduces the safety management risk related to the project.
2) Through the optimization of the performance of the whole material, the modified heat-insulation heat-preservation thermoplastic plate A corrosion prevention system has lower heat conductivity coefficient, for example, the operation temperature of flue gas is 65 ℃, the environment temperature is 25 ℃, and the temperature of the outer wall of the steel plate under the same condition of the plate A corrosion prevention system is 32 ℃ according to the result of the temperature gradient obtained by calculation. According to DL/T5072-2019 'power plant heat preservation paint design rules' 3.0.3, the temperature of the outer wall of the steel plate of the inner anti-corrosion system is lower than 50 ℃, and all the steel plate meets the requirements of the specifications.
3) And according to the corrosion-resistant on-way resistance of the inner plate A system of the flue, the on-way resistance of the flue and the on-way resistance of the traditional glass flake of the lining are different by 0.03Pa after the lining plate A is obtained through calculation according to the friction resistance coefficient of gas flow, the length of a pipeline, the diameter of the pipeline, the density of smoke and other conditional factors.
4) The modified heat-insulating and heat-preserving system formed by the modified heat-insulating and heat-preserving thermoplastic plate A and the elastic adhesive has very excellent anti-corrosion characteristics, excellent stability, durability, convenient construction, maintenance-free maintainability and no regional limitation, and is greatly superior to the traditional anti-corrosion process and the traditional anti-corrosion material.
The anti-corrosion system layer has better anti-corrosion capability, better thermal expansion resistance, cold contraction resistance and mechanical impact resistance, and particularly important, the anti-corrosion material has good heat insulation and heat preservation effects, avoids the tedious heat preservation work in the field use process, also avoids the loss and waste of materials in the heat preservation process, greatly saves the cost of each link in the heat preservation process, and greatly saves the potential safety hazard of the construction field caused by improper heat preservation.
Drawings
FIG. 1 is a schematic diagram of a plate armor corrosion protection system with heat insulation performance;
FIG. 2 is a cross-sectional view taken along the A-A plane of FIG. 1;
FIG. 3 is a graph of heat transfer calculations within a steel flue;
FIG. 4 is a cross-sectional view of the temperature gradients of the plate and Bingo systems at average temperatures throughout the year.
Detailed Description
In order to make the utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Examples
As shown in fig. 1-3, the utility model provides a board armor corrosion protection system structure with heat insulation performance, which comprises a substrate 5, wherein a primer 6 is arranged on the surface of the substrate 5, and a fiber reinforced thermosetting polymer resin board 1 is fixed on one side of the substrate 5 provided with the primer 6 through an adhesive 4.
The fiber reinforced thermosetting polymer resin plate 1 is formed by compounding a polymer foaming layer 2 and a fiber reinforcing agent 3. The structure has the characteristics of excellent integrity and heat preservation performance.
The primer 6 is an epoxy primer or a polyurethane primer.
The adhesive 4 is a Bingo adhesive.
The adjacent fiber reinforced thermosetting polymer resin plates 1 are connected by an adhesive 4.
According to the characteristics of the heat-insulating material, the higher the heat resistance is, the higher the temperature is, the lower the heat conductivity coefficient is, and therefore the better the heat-insulating performance is. The internal and external environment in the flue should meet the following requirements:
the flue gas temperature in the flue should meet the following regulations:
1. when calculating the highest heated temperature in the flue and determining the reduction coefficient of the material under the action of temperature, the highest temperature of the flue in use should be adopted.
2. When determining the dew point temperature of the flue gas and anti-corrosion measures, the lower limit value of the variation range of the flue gas temperature should be adopted.
The ambient temperature outside the flue should meet the following specifications:
1. when calculating the highest heating temperature of the flue and determining the reduction coefficient of the material under the action of temperature, the extreme highest temperature of the local meteorological data should be adopted.
2. When calculating the wall temperature difference, the extreme minimum temperature of the local meteorological data should be used.
The heated temperatures at the points of the flue liner, the insulating layer and the cylinder wall can be calculated according to the following formula:
wherein: t (T) j Calculate the heated temperature (°c) of point j (j=0, 1,., 4);
T g flue gas temperature (DEG C);
T a air temperature (°c);
R tot calculating total thermal resistance (m) of soil layers and the like on the outer sides of the lining, the heat insulation layer, the cylinder wall or the foundation annular wall and the annular wall 2 ·K/W)；
R i An i-th layer thermal resistance (m 2 ·K/W)；
R in Thermal resistance of inner surface of inner liner (m 2 ·K/W)；
In order to demonstrate whether the replacement heat preservation mode can meet the requirement of the standard, the Bingo system and the plate armor system are calculated and evaluated based on the actual working condition of a certain item.
FIG. 4 is a graph showing the results of calculating the temperature gradient according to local annual statistical temperatures using the Bingo liner system and the Banksia liner system after removal of the outer insulation layer, based on the flue gas operating temperature of 52 ℃.
The average temperature of the surface of a certain project area is calculated at 10 ℃, under the condition that the outside of a flue of a bingo lining system is not insulated, the surface temperature of the outer wall is 16.2 ℃, and the temperature of the outer wall of a steel plate under the same condition of a Wei-Guo-plate A corrosion prevention system is 28.4 ℃.
The results calculated from the perennial minimum and maximum air temperatures are shown in table 1.
TABLE 1 temperature of the outer surface of the flue at the highest and lowest air temperatures
According to DL/T5072-2019 'power plant heat preservation paint design rules' 3.0.3, under three air temperature conditions, the temperature of the outer wall of the steel plate of the two inner anti-corrosion systems is lower than 50 ℃, and can meet the standard requirements.
The heat preservation layer is cancelled outside the structure, the plate armor system also has a certain heat insulation function, has lower heat conductivity coefficient than the common anti-corrosion material plate armor system based on lower flue temperature, and has the anti-corrosion heat preservation thickness of 11mm, so the heat insulation performance is quite good. The structure can meet the heat insulation function requirement of removing the outer heat insulation.
Claims (5)
1. The utility model provides a board first anti-corrosion system structure that has thermal-insulated heat preservation performance concurrently, includes through base member (5), its characterized in that, base member (5) surface is equipped with primer (6), and fiber-reinforced thermosetting polymer resin board (1) are fixed in one side that base member (5) are equipped with primer (6) through adhesive (4).
2. The plate armor corrosion protection system structure with heat insulation performance according to claim 1, wherein the primer (6) is epoxy primer or polyurethane primer.
3. The plate armor corrosion protection system structure with heat insulation performance according to claim 1, wherein the adhesive (4) is polyurethane asphalt adhesive or organic silica gel adhesive.
4. The plate armor corrosion protection system structure with heat insulation performance according to claim 3, wherein the adhesive (4) is bingo adhesive.
5. The plate armor corrosion protection system structure with heat insulation performance according to claim 1, wherein adjacent fiber reinforced thermosetting polymer resin plates (1) are connected by an adhesive (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223107031.6U CN219060747U (en) | 2022-11-22 | 2022-11-22 | Plate armor anti-corrosion system structure with heat insulation and heat preservation performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223107031.6U CN219060747U (en) | 2022-11-22 | 2022-11-22 | Plate armor anti-corrosion system structure with heat insulation and heat preservation performance |
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| Publication Number | Publication Date |
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| CN219060747U true CN219060747U (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223107031.6U Active CN219060747U (en) | 2022-11-22 | 2022-11-22 | Plate armor anti-corrosion system structure with heat insulation and heat preservation performance |
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| CN (1) | CN219060747U (en) |
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