Protective plate heat preservation process for boiler workshop

Abstract

The invention provides a protection plate heat preservation process for a boiler workshop, which comprises the following steps: pressing and paving at least two layers of heat preservation fiber blankets on an indoor flat ground, splicing a plurality of heat preservation fiber blankets on each layer to obtain a heat preservation protection plate with a flat heat preservation surface, wrapping the heat preservation protection plate with 1-2 layers of plastic films, and additionally arranging a stainless steel outer lining plate on the outer surface to obtain the heat preservation protection plate with a flat heat preservation surface. Arranging and installing the anchoring parts and tightening the bolts; the thermal insulation side of the wall body of the workshop is coated with high-temperature cement gum, then the thermal insulation protection plate is pasted and laid on the whole wall surface, and wood plates and angle iron are additionally arranged on the side edges of the thermal insulation protection plate for protection. The laying air tightness is good, and cracks are not prone to occurring.

Description

Technical Field

[0001] The invention relates to the technical field of boiler guard plates, and in particular to a guard plate insulation process for a boiler workshop. Background Art

[0002] In recent years, with the continuous development and growth of thermal power plants in my country, new demands have also emerged for the corresponding insulation technology. These mainly include new insulation materials, the performance and storage requirements of new materials, new insulation technical requirements in factories, etc. As the design standards are more standardized, the insulation process requirements have also changed. The quality of the factory workshop insulation process seriously affects the heat dissipation loss of the boiler equipment and the guard plate of the thermal power plant, and plays a decisive role in reducing heat energy loss and improving economic benefits. The traditional workshop insulation project boiler guard plate adopts on-site laying insulation construction. Due to the uneven heat conduction of the wall insulation layer during construction, it is difficult to avoid the generation of "thermal bridges", which makes the workshop wall surface prone to condensation, moisture, and even mold. At the same time, the insulation guard plate has poor air tightness, and the plate is prone to cracks, which affects the insulation effect. Summary of the invention

[0003] In order to solve the technical problem of cracks in the thermal insulation board of the boiler guard board, the present invention provides a guard board thermal insulation process for a boiler workshop, which has good air tightness during laying and is not prone to cracks.

[0004] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0005] A boiler workshop guard plate insulation process comprises the following steps:

[0006] A. Laying thermal insulation fiber blanket

[0007] At least two layers of thermal insulation fiber blankets are compacted and laid flat on the flat floor indoors. Each layer is made of multiple thermal insulation fiber blankets. A thermal insulation panel with a flat thermal insulation surface is obtained. The thermal insulation panel is wrapped with 1-2 layers of plastic film. The waterproof packaging protects the thermal insulation panel from rain and moisture. Then, a stainless steel outer lining is installed on the outer surface. The anchors are arranged and the bolts are tightened. The solidity of the thermal insulation panel is based on the standard that the outer lining will not sink or deform when a 100 kg object is pressed on it.

[0008] B. Install thermal insulation panels

[0009] High-temperature glue is applied on the insulation side of the workshop wall, and then the insulation guard plate is pasted and laid on the wall as a whole, and wooden boards and angle irons are installed on the sides of the insulation guard plate for protection.

[0010] The present invention applies a layer of high-temperature glue on the workshop wall surface before laying the first layer of thermal insulation material, so that the thermal insulation material can be firmly adhered to the wall steel plate, and at the same time, a gap between the thermal insulation body and the wall surface is minimized, and the air tightness is good. At the same time, the thermal insulation guard plate is not directly eroded by boiler smoke.

[0011] The thermal insulation fiber blanket of the present invention is a ceramic fiber blanket, and multiple layers of thermal insulation fiber blankets are laid in sequence according to the joint seams and compacted. The joints of the thermal insulation fiber blankets are compacted and packed tightly, and the compaction degree is 5%-10%.

[0012] The degree of compression refers to (original thickness - thickness after compression) / thickness after compression.

[0013] Preferably, when the total thickness of the thermal insulation protective plate is ≥100 mm, there are no less than three layers, and the density is higher after compaction.

[0014] Preferably, the joint of the thermal insulation fiber blanket is at least 75 mm away from the anchor to avoid gaps, and the processing size of the thermal insulation fiber blanket at the joint of the thermal insulation guard plate is 49 mm larger than the required size to achieve the effect of tightening the joint.

[0015] Further preferably, the thermal insulation fiber blanket is a 1260-type ceramic fiber blanket. This type of fiber blanket can meet the application requirements at a high temperature of 1260°C, exhibits excellent heat resistance and thermal stability, and has good dimensional stability.

[0016] The present invention uses a tripod pressing plate to compact the thermal insulation fiber blanket layer by layer.

[0017] Preferably, the tripod pressure plate includes a support rod, a rectangular pressure plate and four connecting rods, the support rod is vertically arranged at the center of the pressure plate, the four connecting rods are circumferentially evenly connected to the lower part of the support rod, and the connection point between the connecting rod and the pressure plate is located at the end of the longitudinal center line or the transverse center line of the pressure plate; the width of the pressure plate is half of the length, and the height of the support rod is twice the length of the pressure plate.

[0018] The present invention adds a waterproofing agent to the high-temperature mortar to block moisture from entering the thermal insulation protective plate from the inside, thereby further improving the waterproofing effect. The high-temperature mortar is prepared by stirring and mixing the following raw materials by weight: 2-4% of waterproofing agent, 30-35% of high-temperature adhesive, 45% of mixed powder and 16-23% of water, and the mixed powder is composed of the following raw materials: 20-30 parts of white jade corundum fine powder, 3-5 parts of raw clay, 10-20 parts of andalusite, 2-3 parts of borax and 0.2-0.5 parts of sodium hexametaphosphate.

[0019] Preferably, the waterproofing agent is composed of polysilicone oil emulsion and silicone zirconium-stearic acid in a mass ratio of 2:1.

[0020] Preferably, the high temperature adhesive is composed of silica gel, diatomaceous earth and polyvinyl alcohol solution in a mass ratio of 5:0.5:1.5.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention firstly lays the thermal insulation fiber blanket densely on the flat ground indoors to assemble into a high-solidity thermal insulation guard plate, wraps the thermal insulation guard plate with a plastic film and then installs a stainless steel outer lining plate, thereby ensuring the air tightness of the thermal insulation guard plate, preventing moisture from penetrating and preventing cracks from occurring on the thermal insulation board.

[0023] 2. First lay the tiles indoors and then install them as a whole at the construction site. Compared with the traditional on-site block laying, it significantly improves the laying efficiency and prevents the thermal bridge effect caused by uneven heat conduction from making the wall damp. Use special triangular flat plates to lay the tiles indoors, lay them tightly to avoid rework, effectively improve the insulation technology and the first-time pass rate, reduce the labor intensity of construction workers, the risk of rework, and shorten the delivery period. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic cross-sectional view of laying the boiler thermal insulation guard plate of the present invention.

[0025] Figure 2 It is a structural schematic diagram of the tripod pressure plate of the present invention. DETAILED DESCRIPTION

[0026] In order to more clearly and in detail illustrate the technical solution of the present invention, the present invention is further described below through relevant embodiments. The following embodiments are only for specific explanation of the implementation method of the present invention, and do not limit the protection scope of the present invention.

[0027] Example 1

[0028] A boiler workshop guard plate insulation process comprises the following steps:

[0029] A. Laying thermal insulation fiber blanket

[0030] Two layers of thermal insulation fiber blankets are laid flat on the indoor flat ground. Each layer is made of multiple thermal insulation fiber blankets. A thermal insulation board with a flat thermal insulation surface is obtained. The thermal insulation board is wrapped with 1-2 layers of plastic film. A stainless steel outer lining board is then added to the outer surface. Anchors are arranged and installed and bolts are tightened. The solidity of the thermal insulation board is based on the standard that the outer lining board will not sink or deform when a 100 kg object is pressed on it.

[0031] B. Install thermal insulation panels

[0032] High-temperature glue is applied on the insulation side of the workshop wall, and then the insulation guard plate is pasted and laid on the wall as a whole, and wooden boards and angle irons are installed on the sides of the insulation guard plate for protection.

[0033] Example 2

[0034] This embodiment is based on embodiment 1:

[0035] The total thickness of the thermal insulation guard plate is 100 mm. The thermal insulation guard plate contains three layers of thermal insulation fiber blankets, and the three layers of thermal insulation fiber blankets are laid in sequence according to the joints and compacted. The joints of the thermal insulation fiber blankets are compacted and packed tightly, and the compaction degree is 5%.

[0036] The thermal insulation fiber blanket is a 1260 type ceramic fiber blanket.

[0037] Example 3

[0038] This embodiment is based on embodiment 1:

[0039] The total thickness of the thermal insulation guard plate is 130 mm. The thermal insulation guard plate contains four layers of thermal insulation fiber blankets, and the four layers of thermal insulation fiber blankets are laid in sequence according to the joints and compacted. The joints of the thermal insulation fiber blankets are compacted and packed tightly, and the compaction degree is 10%.

[0040] The joint of the thermal insulation fiber blanket is at least 75 mm away from the anchor, and the processed size of the thermal insulation fiber blanket at the joint of the thermal insulation guard plate is 49 mm larger than the required size.

[0041] The thermal insulation fiber blanket is a 1260 type ceramic fiber blanket.

[0042] Example 4

[0043] This embodiment is based on Embodiment 3:

[0044] The thermal insulation fiber blanket was compacted layer by layer to 8% using a tripod pressing plate.

[0045] like Figure 2 As shown, the tripod pressure plate includes a support rod, a rectangular pressure plate and four connecting rods. The support rod is vertically arranged at the center of the pressure plate. The four connecting rods are evenly distributed around the circumference to connect the lower part of the support rod, and the connection point between the connecting rod and the pressure plate is located at the end of the longitudinal midline or the transverse midline of the pressure plate; the width of the pressure plate is half of the length, and the height of the support rod is twice the length of the pressure plate. The four connecting rods provide stable support, and the pressure plate is evenly stressed. The height of the support rod is twice the length of the pressure plate, which is labor-saving and more convenient to use.

[0046] Example 5

[0047] In order to further improve the waterproof effect, the present invention adds a waterproof agent to the high temperature mortar. The high temperature mortar is prepared by stirring and mixing the following raw materials by weight: 2-4% of the waterproof agent, 30-35% of the high temperature adhesive, 45% of the mixed powder and 16-23% of the water, wherein the mixed powder is composed of the following raw materials: 20-30 parts of white jade corundum fine powder, 3-5 parts of raw clay, 10-20 parts of andalusite, 2-3 parts of borax and 0.2-0.5 parts of sodium hexametaphosphate.

[0048] The high temperature adhesive is composed of silica gel, diatomaceous earth and polyvinyl alcohol solution in a mass ratio of 5:0.5:1.5.

[0049] The present invention uses a variety of different types and combinations of waterproofing agents to conduct experiments. According to the above basic formula, 3% of waterproofing agent, 35% of high-temperature adhesive, 45% of mixed powder and 17% are mixed and stirred for 10 minutes to obtain 10 groups of high-temperature cement. The mixed powder is composed of the following raw materials: 20 parts of white jade corundum fine powder, 5 parts of raw clay, 15 parts of garnet, 2 parts of borax and 0.3 parts of sodium hexametaphosphate.

[0050] Table 1 Composition ratio of waterproofing agent in each group of high temperature mortar

[0051]

[0052] Table 2 shows the performance test comparison results of 10 groups of high temperature mortar and a control group, where the control group is a basic formula without a waterproofing agent.

[0053] The bonding strength is tested by a high-temperature ceramic experimental system. A small piece of thermal insulation fiber blanket and an aluminum alloy plate are bonded together with glue, and the thickness of the glue is 2mm. After the glue solidifies, it is pulled apart to test the bonding strength of the glue.

[0054] The water absorption rate is calculated by placing the cured cement into an empty water tank: water absorption rate = (weight after water absorption - initial weight) / initial weight × 100%.

[0055] Table 2 Physical properties of each group of high temperature clay samples

[0056]

[0057]

[0058] As can be seen from Table 1, the combination of polysilicone oil emulsion and silicone zirconium-stearic acid in Group 8 has the lowest water absorption, the best waterproof effect, and good fire resistance. On this basis, the mass ratio of the two was changed to further test the performance of the high temperature mortar.

[0059] Table 3 Physical properties of each group of high temperature clay samples

[0060]

[0061] As can be seen from Table 2, when the ratio of polysilicone oil emulsion to silicone zirconium-stearic acid in Group 15 is 2:1, the water absorption rate is the lowest, which is the best choice.

[0062] The present invention adopts the high-temperature mortar of the 15th group of mix ratios in the inlet transition flue workshop of the Sichuan Energy Investment Guangyuan Gas 9H 1# unit (1 unit) of Xizi Clean Energy Company, and is constructed according to the guard plate insulation process of Example 3. The laid insulation board is successfully laid on site at one time, and no thermal bridge effect is generated on the wall. No cracks appear on the insulation board 6 months after the construction is completed.

[0063] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A boiler workshop guard plate insulation process, characterized in that: The following steps are involved: A. Laying thermal insulation fiber blanket At least two layers of thermal insulation fiber blankets are laid flat on the indoor flat ground. Each layer is made of multiple thermal insulation fiber blankets. A thermal insulation board with a flat thermal insulation surface is obtained. The thermal insulation board is wrapped with 1-2 layers of plastic film. A stainless steel outer lining board is then installed on the outer surface. The anchors are arranged and the bolts are tightened. The solidity of the thermal insulation board is based on the standard that the outer lining board will not sink or deform when a 100 kg object is pressed on it. B. Install thermal insulation panels High-temperature glue is applied on the insulation side of the workshop wall, and then the insulation guard plate is pasted and laid on the wall as a whole, and wooden boards and angle irons are installed on the sides of the insulation guard plate for protection.

2. The boiler workshop guard plate insulation process according to claim 1 is characterized in that: The thermal insulation fiber blanket is a ceramic fiber blanket, and multiple layers of thermal insulation fiber blankets are laid in sequence by staggering and compacting according to the joints. The joints of the thermal insulation fiber blankets are compacted and packed tightly, and the compaction degree is 5%-10%.

3. The boiler workshop guard plate insulation process according to claim 2 is characterized in that: When the total thickness of the thermal insulation board is ≥100mm, there shall be no less than three layers.

4. The boiler workshop guard plate insulation process according to claim 2 is characterized in that: The joint of the thermal insulation fiber blanket is at least 75 mm away from the anchor, and the processed size of the thermal insulation fiber blanket at the joint of the thermal insulation guard plate is 49 mm larger than the required size.

5. The boiler workshop guard plate insulation process according to claim 4 is characterized in that: The thermal insulation fiber blanket is a 1260 type ceramic fiber blanket.

6. The boiler workshop guard plate insulation process according to claim 1 is characterized in that: The thermal insulation fiber blanket is compacted layer by layer using a tripod pressing plate.

7. The boiler workshop guard plate insulation process according to claim 6 is characterized in that: The tripod pressure plate includes a support rod, a rectangular pressure plate and four connecting rods, the support rod is vertically arranged at the center of the pressure plate, the four connecting rods are circumferentially evenly connected to the lower part of the support rod, and the connection point between the connecting rod and the pressure plate is located at the end of the longitudinal center line or the transverse center line of the pressure plate; the width of the pressure plate is half of the length, and the height of the support rod is twice the length of the pressure plate.

8. The boiler workshop guard plate insulation process according to claim 1 is characterized in that: The high temperature mortar is prepared by mixing the following raw materials by weight: 2-4% waterproofing agent, 30-35% high temperature adhesive, 45% mixed powder and 16-23% water. The mixed powder is composed of the following raw materials: 20-30 parts of white jade corundum fine powder, 3-5 parts of raw clay, 10-20 parts of andalusite, 2-3 parts of borax and 0.2-0.5 parts of sodium hexametaphosphate.

9. The boiler workshop guard plate insulation process according to claim 8, characterized in that: The waterproofing agent is composed of polysilicone oil emulsion and silicone zirconium-stearic acid, with a mass ratio of 2:

1.

10. The boiler workshop guard plate insulation process according to claim 8, characterized in that: The high temperature adhesive is composed of silica gel, diatomaceous earth and polyvinyl alcohol solution in a mass ratio of 5:0.5:1.5.

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