Insulation treatment method

Abstract

To provide an insulation system and insulation treatment method with high thermal insulation performance. [Solution] A method for insulating a heat source, comprising: a first insulating layer forming step of forming a first insulating layer surrounding the heat source; a second insulating layer forming step of forming a second insulating layer surrounding the first insulating layer with a space between them; a blower installation step of installing a blower for blowing air into the space between the first insulating layer and the second insulating layer; and a blowing step of driving the blower and blowing air into the space.

Description

Technical Field

[0001] The present invention relates to a heat insulation system and a heat insulation treatment method.

Background Art

[0002] In order to insulate heat from a heat source such as an exhaust duct, a heat insulation wall material provided so as to surround the heat source is known. Patent Document 1 describes, as an example of such a heat insulation wall material, a heat insulation wall material that includes a cured product of an inorganic binder and surrounds a ventilation duct.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, it has been difficult to achieve sufficient heat insulation performance with only such a heat insulation wall material. Therefore, an object of the present invention is to provide a heat insulation system and a heat insulation treatment method that achieve sufficient heat insulation performance.

Means for Solving the Problems

[0005] The system of the present invention relates to a heat insulation system for heat-treating a heat source. The heat insulation system includes a first heat insulation layer surrounding the heat source, a second heat insulation layer surrounding the first heat insulation layer with a space therebetween, a blower for blowing air into the space between the first heat insulation layer and the second heat insulation layer, and a blower drive unit for driving the blower to blow air into the space.

[0006] The heat source is preferably an exhaust duct. The first heat insulation layer preferably has a first rock wool layer covering the exhaust duct, and the second heat insulation layer preferably has a second rock wool layer.

[0007] Preferably, the insulation system further includes a temperature measuring unit for measuring the temperature outside the second insulation layer, and an airflow adjustment unit for adjusting the amount of air blown by the blower in accordance with the temperature measured by the temperature measuring unit.

[0008] The insulation system preferably maintains the temperature outside the second insulation layer at 40 degrees Celsius or below.

[0009] The present invention relates to a method for insulating a heat source. The insulating treatment method includes a first insulating layer formation step, which is the step of forming a first insulating layer surrounding the heat source; a second insulating layer formation step, which is the step of forming a second insulating layer surrounding the first insulating layer with a space between it and the first insulating layer; a blower installation step, which is the step of installing a blower for blowing air into the space between the first insulating layer and the second insulating layer; and a blower operation step, which is the step of driving the blower and blowing air into the space.

[0010] The heat source is preferably an exhaust duct. The first insulation layer preferably has a first rock wool layer covering the exhaust duct, and the second insulation layer preferably has a second rock wool layer.

[0011] The heat insulation treatment method preferably further includes a temperature measurement step of measuring the temperature outside the second heat insulation layer, and an airflow adjustment step of adjusting the amount of air blown by a blower in accordance with the temperature measured in the temperature measurement step.

[0012] In the insulation treatment method, it is preferable to maintain the temperature outside the second insulation layer at 40 degrees Celsius or lower. [Effects of the Invention]

[0013] According to the above invention, it is possible to provide an insulation system and an insulation treatment method with high thermal insulation performance. [Brief explanation of the drawing]

[0014] [Figure 1] Figure 1 is a cross-sectional perspective view of an example of the thermal insulation system of the present invention. [Figure 2]Figure 2 is a cross-sectional perspective view of another example of the thermal insulation system of the present invention. [Figure 3] Figure 3 shows the flow of the process performed in the heat insulation treatment method. [Figure 4] Figure 4 shows an example of the configuration of the cross-sectional system of the present invention. [Modes for carrying out the invention]

[0015] The embodiments for carrying out the present invention will be described below with reference to the drawings. The present invention is not limited to the embodiments described below, but also includes modifications made to the embodiments described below to the extent that is obvious to those skilled in the art.

[0016] [Configuration of Insulation System 1] Figure 1 is a cross-sectional perspective view of an example of an insulation system 1. As shown in Figure 1, the insulation system 1 includes a first insulation layer 10, a second insulation layer 20, a blower 30, and a blower drive unit 32. The insulation system 1 may further include a temperature measuring unit 50 and an airflow adjustment unit 34. Furthermore, the insulation system 1 may include an exhaust fan 60. The elements will now be described with reference to Figure 1.

[0017] Heat source (exhaust duct) 40 The heat source 40 is surrounded by the first insulation layer 10 and is an element that generates heat. The heat source 40 is, for example, an exhaust duct or a chimney.

[0018] First insulation layer 10, first rock wool layer 12 The first heat insulation layer 10 is for insulating the heat from the heat source 40. The first heat insulation layer 10 is provided so as to surround the heat source 40. The first heat insulation layer 10 may have a pipe-like shape that encloses and surrounds the heat source 40. The first heat insulation layer 10 may have a linearly extending shape, a curved shape, or, for example, an L-shaped shape. The cross-section of the first heat insulation layer 10 cut in a plane perpendicular to the direction in which the first heat insulation layer 10 extends may be a polygon, a circle, or an ellipse. The cross-sectional perspective view of FIG. 1 shows the case where the cross-section of the first heat insulation layer 10 is a quadrilateral. When the cross-section of the first heat insulation layer 10 is a quadrilateral, the thicknesses of the four surfaces forming the first heat insulation layer may be equal or different for each surface. In this case, among the upper and lower surfaces parallel to the ground inside the first heat insulation layer 10, either the thickness or the volume may be different from each other. The thickness of the lower surface of the first heat insulation layer 10 may be 50% or more and 60% or less of the thickness of the upper surface, or 70% or more and 80% or less. When the heat insulation layer surrounds the heat source 40, since the heat generated from the heat source 40 moves upward, heat tends to accumulate more in the upper part than in the lower part inside the heat insulation layer. By making the thickness of the upper surface of the first heat insulation layer 10 thicker than the lower surface, the heat insulation performance of the upper part of the first heat insulation layer 10 can be enhanced compared to the lower part, and it can also contribute to miniaturization of the first heat insulation layer 10. When the cross-section of the first heat insulation layer 10 is a quadrilateral, its long side may be 40 cm or more and 80 cm or less, and the length of its short side may be 30% or more and 70% or less of the long side.

[0019] Also, a recessed portion (not shown) may be provided on the inner surface of the first heat insulation layer 10. Further, a heat dissipation layer (not shown) may be provided outside the first heat insulation layer 10 so as to surround the first heat insulation layer 10 in a spiral shape. The heat dissipation layer is preferably provided outside the first heat insulation layer 10 along a spiral air flow passing through the air layer 70 described later. By doing so, the heat of the heat source 40 can be efficiently discharged from the air layer 70.

[0020] Furthermore, the first heat insulation layer 10 has a first rock wool layer 12. The entire first heat insulation layer 10 may be composed of the first rock wool layer 12. The first heat insulation layer 10 may be formed of a rectangular parallelepiped housing and the first rock wool layer 12. In this case, the first rock wool layer 12 is formed inside each surface of the housing. The first heat insulation layer 10 may include a layer containing something other than rock wool instead of the first rock wool layer 12. In this case, the first heat insulation layer 10 may have a layer containing any one of, for example, calcium silicate board, RC (reinforced concrete), ALC (lightweight cellular concrete), and refractory board.

[0021] Furthermore, a wind guiding wing (not shown) may be provided on the outer surface of the first heat insulation layer 10. The wind guiding wing is preferably provided so as to draw a spiral from the blower 30 side toward the exhaust fan 40 with respect to the first heat insulation layer 10. By doing so, the air flow passing through the air layer 70 described later becomes likely to draw a spiral, and as a result, it becomes possible to efficiently exhaust the air in the air layer 70.

[0022] The second heat insulation layer 20, the second rock wool layer 22 As shown in Figure 1, the second insulation layer 20 is provided so as to surround the first insulation layer 10. The second insulation layer 20 may be pipe-shaped and surround the first insulation layer 10. The shape of the second insulation layer 20 may be, for example, a linearly extending shape, similar to the first insulation layer 10, or it may be a curved shape, such as an L-shape. The second insulation layer 20 is formed so as to surround the first insulation layer 10, and an air layer 70, which will be described later, is provided between the first insulation layer 10 and the second insulation layer 20. Furthermore, the second insulation layer 20 has a second rock wool layer 22. The entire second insulation layer 20 may be composed of the second rock wool layer 22. The second insulation layer 20 may be formed of a housing and the second rock wool layer 22. The second insulation layer 20 may include a layer containing something other than rock wool instead of the second rock wool layer 22. In this case, the second insulation layer 20 may include a layer containing, for example, calcium silicate board, reinforced concrete (RC), autoclaved lightweight concrete (ALC), fire-resistant board, etc. Furthermore, the side surface of the second insulation layer 20 may have an inspection opening (not shown) for inspecting the inside of the air layer 70, which will be described later.

[0023] Blower fan 24 It is preferable that a blower fan 24 is provided within the second insulation layer 20. Figure 2 is a cross-sectional perspective view of an example of the insulation system 1 of the present invention. It is preferable that a plurality of blower fans 24 are provided within the second insulation layer 20. The blower fans 24 may be provided, for example, in the corners of the second insulation layer 20. In particular, as shown in Figure 2, it is preferable that the blower fans 24 be provided in positions where, when adjacent blower fans 24 in the second insulation layer 20 are smoothly connected, they form a spiral. In this way, the airflow of the wind blown into the air layer 70, which will be described later, by the blower 30, which will be described later, becomes a spiral airflow from the blower 30 to the exhaust fan 40. As a result, the air in the air layer 70 is discharged more efficiently and quickly from the exhaust fan 40.

[0024] Air layer 70 The air layer 70 is a space provided between the first insulation layer 10 and the second insulation layer 20. By blowing air from the blower 30 into this air layer 70, the heat generated from the heat source 40 can be cooled, thereby improving the insulation performance of the insulation system 1.

[0025] Blower 30 The blower 30 is a device for blowing air into the space between the first insulation layer 10 and the second insulation layer 20. The blower 30 may be connected to the inside of any surface of the second insulation layer 20 via a connecting pipe. By blowing air into the space between the first insulation layer 10 and the second insulation layer 20 using the blower 30, the temperature of the air layer 70 can be lowered. A known blower fan can be used as the blower. One blower 30 may be provided in the insulation system 1, or two or more may be provided.

[0026] Blower drive unit 32 The blower drive unit 32 drives the blower 30 and causes the blower 30 to perform airflow. The blower drive unit 32 is, for example, included in the blower 30 and plays a role in controlling the airflow function of the blower 30. The blower drive unit 32 includes, for example, a motor and actuator for rotating the fan of the blower 30, and upon receiving a signal from the airflow adjustment unit 32, adjusts the motor speed and airflow rate based on that signal.

[0027] Temperature measurement section 50 The temperature measuring unit 50 is for measuring the temperature outside the second insulation layer 20. The temperature measuring unit 50 is installed, for example, on the outside of the second insulation layer 20. The temperature measuring unit 50 includes a temperature sensor and periodically transmits the measured temperature information to the airflow rate adjustment unit 34.

[0028] Air flow adjustment section 34 The airflow adjustment unit 34 adjusts the airflow rate from the blower 30 in accordance with the temperature measured by the temperature measuring unit 50. If the temperature outside the second insulation layer 20, as measured by the temperature measuring unit 50, is higher than the target temperature, the airflow adjustment unit 34 transmits a control signal to the blower drive unit 32 to increase the airflow rate. On the other hand, if the temperature outside the second insulation layer, as measured by the temperature measuring unit 50, is lower than a predetermined target temperature, the airflow adjustment unit 34 transmits a control signal to the blower drive unit 32 to decrease the airflow rate. The target temperature outside the second insulation layer 20 is preferably 40 degrees Celsius or lower.

[0029] [Insulation treatment method] Next, the heat insulation treatment method of this embodiment will be described. Figure 3 is a diagram showing an example of the flow of the heat insulation treatment method using the heat insulation system of the present invention. This heat insulation treatment method includes a first heat insulation layer formation step (S110), a second heat insulation layer formation step (S120), a blower installation step (S130), a temperature measurement unit installation step (S140), a blower blowing step (S150), a blower volume adjustment step (S160), and a temperature measurement step (S170). In this example, the heat insulation treatment method is shown as being performed in the following order, but the order of the heat insulation treatment method is not limited to this order as long as the objective of the heat insulation treatment method of the present invention can be achieved.

[0030] In the first insulation layer formation process, a first insulation layer 10 is formed to surround a heat source such as an exhaust duct 40. In the second insulation layer formation process, a second insulation layer 20 is formed to surround the first insulation layer 10. In the blower installation process, a blower 30 is installed on the side of the second insulation layer 20. In the temperature measurement unit installation process, a temperature measurement unit 50 is installed on the outside of the second insulation layer 20. In the blowing process, a blower drive unit 32 controls the blower 30 to send air into the space layer 70 between the first insulation layer 10 and the second insulation layer 20. When the blowing process starts, the temperature measurement process and the airflow rate adjustment process also start. In the temperature measurement process, the temperature measurement unit 50 measures the temperature on the outside of the second insulation layer. In the airflow rate adjustment process, the airflow rate adjustment unit 34 adjusts the airflow rate in accordance with the temperature measured by the temperature measurement unit 50 so that the temperature outside the second insulation layer is maintained at the target temperature. Specifically, if the temperature outside the second insulation layer is higher than the target temperature, the airflow rate is increased, and if the temperature outside the second insulation layer is lower than the target temperature, the airflow rate is decreased.

[0031] [Examples and Reference Examples] Figure 4 shows an example of the configuration of the thermal insulation system 1 of the present invention and the temperature measurement location. In the example configuration shown in the figure, a portion of the exhaust duct connected to the chimney and silencer is insulated with the thermal insulation system 1 of the present invention, providing double insulation with first and second thermal insulation layers. The double-insulated portion is indicated by the dotted line in the figure. The surface temperature of the second thermal insulation layer 20 was measured at the silencer, positions A, B, and C in Figure 3, before the start of airflow by the blower 30 and 3 hours after the start of airflow.

[0032] [Table 1]

[0033] The measured temperatures at the silencer, positions A, B, and C in the figure before the generator started operation were 15.6°C, 14.6°C, 14.6°C, and 14.6°C, respectively. Three hours after the generator started operation, the measured temperatures at the silencer, positions A, B, and C were 26.4°C, 17.1°C, 14.6°C, and 14.6°C, respectively. Thus, it can be seen that the temperature rise rate of the part using the heat insulation system 1 of the present invention is lower than that of the part without it.

[0034] Next, examples and reference examples relating to the thermal insulation system of the present invention will be described. The thermal insulation treatment of the present invention was applied to the exhaust stack inside a building under the conditions shown in Table 2 below, and heat generated from the generator was allowed to flow into the exhaust stack. After that, the temperature of the exhaust stack surface and the temperature around the exhaust stack were measured. The measurement results are shown in Table 3.

[0035] [Table 2]

[0036] [Table 3]

[0037] Example 1 As shown in Table 1, in Example 1, rock wool was used as the insulating material for the first insulation layer. The density of the insulating material for the first insulation layer was 80 kg / m³. 3 The thickness of the insulation material was set to 100 mm. Air was blown into the air gap 70 between the first insulation layer 10 and the second insulation layer 20 at a wind speed of 0 m / s, making the thickness of the air gap 0 mm. Rock wool was used as the insulation material for the second insulation layer. The insulation density of the second insulation layer was set to 80 kg / m³ 3 The thickness of the insulation material was set to 0 mm.

[0038] Example 2 In Example 2, the insulation treatment was performed under the same conditions as in Example 1, except that the thickness of the insulation material in the first insulation layer was set to 150 mm.

[0039] Example 3 In Example 3, air was blown into the air layer between the first and second insulation layers at a wind speed of 2.4 m / s, and the thickness of the air layer was set to 50 mm. Otherwise, the insulation treatment was carried out under the same conditions as in Example 1.

[0040] Example 4 In Example 4, the thickness of the insulation material in the first insulation layer was set to 150 mm, and air was blown into the air layer between the first and second insulation layers at a wind speed of 2.4 m / s, resulting in an air layer thickness of 50 mm. Otherwise, the insulation treatment was carried out under the same conditions as in Example 1.

[0041] Example 5 As shown in Table 1, in Example 5, the insulation treatment was carried out under the same conditions as in Example 4, except that the thickness of the insulation material in the second insulation layer was set to 25 mm.

[0042] Example 6 In Example 6, the thickness of the first layer of insulation material was set to 150 mm, and the insulation treatment was carried out under the same conditions as in Example 5. In this example, as shown in Table 2, when the heat source temperature was set to 320°C, the ambient temperature of the insulation system was 14.6°C.

[0043] Example 7 In Example 7, the thickness of the air layer was set to 0 mm, and calcium silicate was used as the insulating material for the second insulating layer 20. Otherwise, the insulation treatment was carried out under the same conditions as in Example 6.

[0044] Reference example 1 In Reference Example 1, rock wool was used for the first insulation layer 10. The insulation density of the first insulation layer 10 was 80 kg / m³. 3 The thickness of the insulation material was set to 150 mm. Reinforced concrete (RC) was used for the insulation material of the second insulation layer 20.

[0045] Reference example 2 In Reference Example 2, ALC (autoclaved lightweight concrete) was used as the insulation material for the second insulation layer 20. Otherwise, the insulation treatment was carried out under the same conditions as in Reference Example 1.

[0046] Reference example 3 In Reference Example 3, air was blown into the air layer 70 between the first insulation layer 10 and the second insulation layer 20 at a wind speed of 0.5 m / s, and a fire-resistant board was used as the insulation material for the second insulation layer 20. In this embodiment, as shown in Table 2, when the heat source temperature was set to 450°C, the ambient temperature of the insulation system 1 was 21.8°C. [Explanation of symbols]

[0047] 1. Insulation System 10. First insulation layer 12. First rock wool layer 20. Second insulation layer 22. Second rock wool layer 24. Blower fan 30. Blower 32. Blower drive unit 34...Blow volume adjustment section 40. Heat source (exhaust duct) 50...Temperature measurement section 60··Exhaust fan 70. Air layer

Claims

1. A method for insulating a heat source, The first step of forming an insulating layer is a step of forming a first insulating layer surrounding the heat source, A second insulation layer formation step, which involves forming a second insulation layer that surrounds the first insulation layer, with a space separating it from the first insulation layer, A blower installation step involves installing a blower for blowing air into the space between the first insulation layer and the second insulation layer, A blowing process for driving the blower and blowing air into the space, Methods that include...

2. The method according to claim 1, The heat source is an exhaust duct, in this method.

3. The method according to claim 2, The first insulation layer has a first rock wool layer covering the exhaust duct, The method comprises a second insulation layer having a second rock wool layer.

4. The method according to claim 3, further comprising the step of installing a temperature measuring unit for measuring the temperature outside the second insulation layer, A method further comprising an airflow rate adjustment step of adjusting the amount of air blown by the blower in accordance with the temperature measured by the temperature measuring unit.

5. A method according to claim 4, comprising maintaining the temperature outside the second insulating layer at 40 degrees Celsius or lower.

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