RTO fire-resistant thermal insulation device capable of preventing gas corrosion

Abstract

The utility model provides an RTO fire-resistant heat preservation device capable of preventing gas corrosion. The RTO fire-resistant heat preservation device comprises an RTO shell steel plate, an outer protection plate and a heat preservation layer are sequentially arranged on the outer side of the RTO shell steel plate from outside to inside. A metal film layer, a backing plate, a refractory fiber blanket, a fastener and a refractory fiber module are sequentially arranged on the inner side of the RTO shell steel plate from inside to outside; the thermal insulation layer is laid on the outer side of the RTO shell steel plate; the outer protection plate is laid on the outer side of the heat preservation layer and used for protecting the heat preservation layer and isolating the external environment; and the metal film layer is tightly attached to the inner side of the RTO shell steel plate. The RTO fire-resistant heat preservation device capable of preventing gas corrosion has the beneficial effects that the RTO shell steel plate can be effectively protected from being corroded by acid gas, and compared with an expensive stainless steel material, the cost is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat preservation devices, and relates to an RTO refractory heat preservation device for preventing gas corrosion. Background Technique

[0002] RTO is a device for treating VOCs in industrial waste gas. Corrosive acidic gases such as HCl, HF, and SOx often accompany VOCs. In order to eliminate VOCs in industrial waste gas, the method adopted by RTO is to heat the waste gas above the ignition point of VOCs and burn the VOCs. Therefore, the temperature inside RTO is generally above 760°C, and the conventional RTO shell steel plate cannot withstand such a high temperature. Therefore, refractory materials need to be laid inside RTO to protect the RTO shell.

[0003] In the prior art, the refractory heat preservation structure of RTO is generally refractory fiber modules, refractory fiber felts, and RTO shell steel plates from the inside to the outside:

[0004] For example, in the heat preservation refractory structure disclosed in patent CN210425054U, both the refractory fiber modules and the refractory fiber felts are fluffy structures. During operation, acidic gases such as HCL, HF, and SOx will diffuse from inside the refractory fiber modules and the refractory fiber felts to the RTO shell steel plate. The outer surface of the RTO shell steel plate is exposed to the external environment, and its temperature is approximately the same as the external environment temperature, which is generally below the dew point temperature of the acidic gas. Therefore, it will cause the acidic gas to condense on the RTO shell steel plate, corrode the RTO shell steel plate, cause air leakage in the shell, result in environmental pollution accidents, and even cause safety accidents such as equipment collapse.

[0005] To solve the above technical problems, expensive stainless steel materials are selected for the RTO shell steel plate, but this will result in a high cost for RTO.

[0006] Based on the above prior art, in order to solve the deficiencies in the prior art, the utility model relates to an RTO refractory heat preservation device. This RTO refractory heat preservation device can not only effectively protect the RTO shell steel plate from being corroded by acidic gases, but also effectively reduce the cost compared with using expensive stainless steel materials. Summary of the Invention

[0007] The utility model provides an RTO refractory heat preservation device for preventing gas corrosion to solve the problems existing in the prior art. This RTO refractory heat preservation device can not only effectively protect the RTO shell steel plate from being corroded by acidic gases, but also effectively reduce the cost compared with using expensive stainless steel materials.

[0008] The purpose of the utility model can be achieved by the following technical solutions:

[0009] An RTO refractory insulation device against gas corrosion, comprising:

[0010] The RTO housing steel plate;

[0011] On the outer side of the RTO housing steel plate, an outer protection plate and a thermal insulation layer are successively arranged from outside to inside;

[0012] On the inner side of the RTO housing steel plate, a metal film layer, a backing plate, a refractory fiber blanket, fasteners, and refractory fiber modules are successively arranged from inside to outside;

[0013] The thermal insulation layer is laid on the outer side of the RTO housing steel plate, and the thickness of the thermal insulation layer is 50 - 150 mm.

[0014] The thickness of the thermal insulation layer is specifically set according to the concentration of corrosive gas in the gas processed by the RTO; generally, the material of the thermal insulation layer is thermal insulation rock wool, and thermal insulation materials such as aluminum silicate fiber can also be used.

[0015] The outer protection plate is laid on the outer side of the thermal insulation layer, used to protect the thermal insulation layer and isolate the external environment;

[0016] The metal film layer is closely attached to the inner side of the RTO housing steel plate.

[0017] As a further improvement of this solution, the metal film layer is an aluminum film layer.

[0018] As a further improvement of this solution, the material of the backing plate is refractory material, and the backing plate is laid on the inner side of the aluminum film.

[0019] As a further improvement of this solution, the refractory fiber blanket is laid on the backing plate, and the seams of the refractory fiber blanket are staggered from the gaps between the refractory fiber modules.

[0020] As a further improvement of this solution, the refractory fiber modules are laid on the refractory fiber blanket and fixed by fasteners;

[0021] As a further improvement of this solution, it further includes refractory fiber felts, and the refractory fiber felts are arranged between the refractory fiber modules.

[0022] Compared with the prior art, it has the following beneficial effects:

[0023] 1. By adjusting the thickness of the thermal insulation layer, the wall temperature of the RTO housing steel plate can be effectively controlled to prevent acid gas condensation and corrosion;

[0024] 2. The setting of the aluminum film and the backing plate provides double protection and effectively blocks the contact between the acid gas and the RTO housing steel plate;

[0025] 3. The staggered joint design of the refractory fiber blanket and the refractory fiber felt further improves the structural sealing and prevents the diffusion of acidic gases. Description of the Drawings

[0026] Figure 1 is a schematic structural view of an RTO refractory insulation device for preventing gas corrosion according to the present utility model;

[0027] Figure 2 is a schematic structural view of the insulation layer of the insulation device of the RTO combustion furnace in the prior art.

[0028] Description of the Reference Numerals

[0029] 1 - Outer protection plate; 2 - Insulation layer; 3 - RTO housing steel plate; 4 - Metal film layer; 5 - Backing plate; 6 - Refractory fiber blanket; 7 - Fastener; 8 - Refractory fiber module; 9 - Refractory fiber felt; 10 - Combustion chamber; 11 - Refractory layer; 12 - Insulation layer. Detailed Embodiments

[0030] The technical solutions of the present utility model will be further described below in conjunction with the embodiments and the drawings.

[0031] As shown in the figure, the RTO refractory insulation device for preventing gas corrosion of the present utility model includes:

[0032] RTO housing steel plate 3;

[0033] On the outer side of the RTO housing steel plate 3, an outer protection plate 1 and an insulation layer 2 are sequentially arranged from outside to inside;

[0034] On the inner side of the RTO housing steel plate 3, a metal film layer 4, a backing plate 5, a refractory fiber blanket 6, a fastener 7, and a refractory fiber module 8 are sequentially arranged from inside to outside;

[0035] Insulation layer 2, which is laid on the outer side of the RTO housing steel plate 3, and the thickness of the insulation layer 2 is 50 - 150 mm. It can be calculated according to the concentration of corrosive gases in the gas processed by the RTO; the material of the insulation layer is generally insulation rock wool, or other insulation materials such as aluminum silicate fiber can also be used.

[0036] Outer protection plate 1, which is laid on the outer side of the insulation layer 2 and is used to protect the insulation layer 2 and isolate the external environment;

[0037] Metal film layer 4, which is closely attached to the inner side of the RTO housing steel plate 3.

[0038] In the prior art, the disadvantages of the RTO device are as follows:

[0039] 1) The outer surface of the RTO housing steel plate is exposed to the external environment, and its temperature is approximately the same as the external environment temperature, which is generally below the dew point temperature of the acidic gas. As a result, acidic gas will condense on the RTO housing steel plate, corroding the RTO housing steel plate, causing air leakage in the housing, environmental pollution accidents, and even safety accidents such as equipment collapse; 2) If expensive stainless steel materials are selected for the RTO housing steel plate, it will result in a high cost for the RTO.

[0040] Based on the above prior art, in order to solve the deficiencies in the prior art, the present utility model relates to an RTO refractory insulation device for preventing gas corrosion. This RTO refractory insulation device for preventing gas corrosion can not only effectively protect the RTO housing steel plate from being corroded by acidic gas, but also effectively reduce costs compared with using expensive stainless steel materials.

[0041] In this embodiment,

[0042] Compared with the prior art, the RTO housing steel plate is in direct contact with the external environment;

[0043] The RTO housing steel plate 3 of this RTO is not in direct contact with the outside. A thermal insulation layer 2 with a thickness of 50 - 150 mm and an outer protection plate 1 are laid on the outside of the RTO housing steel plate 3.

[0044] The thickness of the thermal insulation layer is generally 50 - 150 mm, which is calculated according to the concentration of corrosive gas in the gas processed by the RTO; the material of the thermal insulation layer is generally thermal insulation rock wool, and other thermal insulation materials such as aluminum silicate fiber can also be used.

[0045] Through the externally laid thermal insulation layer 2, by adjusting the thickness of the thermal insulation layer 2, the wall temperature of the RTO housing steel plate 3 can be adjusted, making the wall temperature about 15 °C higher than the acidic gas temperature, which can ensure that the acidic gas will not condense and corrode the RTO housing steel plate 3, and ensure the normal operation of the RTO equipment.

[0046] Furthermore, a metal film layer 4 is closely attached to the inner side of the RTO housing steel plate, having the characteristics of reflecting heat and resisting acidic gas corrosion.

[0047] As a further preferred embodiment, the metal film layer 4 is an aluminum film layer.

[0048] In this embodiment,

[0049] By laying a layer of metal film layer, that is, the aluminum film layer in this embodiment, on the inner side of the RTO housing steel plate 3, the following effects are achieved:

[0050] 1) The aluminum film 4 laid on the inner side can reflect heat and return part of the heat radiated from the inside of the RTO back to the inside of the RTO. 2) The aluminum film 4 is resistant to corrosion by acidic gases. Even if acidic gases diffuse out through the refractory fiber module and the refractory fiber felt, when they first encounter the aluminum film 4, they can effectively block the contact between the acidic gases and the RTO housing steel plate 3, effectively protecting the housing steel structure of the RTO.

[0051] As a further preferred embodiment, the backing plate 5 is made of refractory material, and the backing plate 5 is laid on the inner side of the aluminum film 4.

[0052] In this embodiment, the backing plate 5 is made of refractory material and has a high density, which can both keep warm and effectively block gas diffusion.

[0053] As a further preferred embodiment, the refractory fiber blanket 6 is laid on the backing plate 5, and the seam of the refractory fiber blanket 6 is staggered from the gap between the refractory fiber modules 8.

[0054] In actual engineering, multiple refractory fiber blankets are used. The refractory fiber blankets are connected one after another in sequence, and the gap between two adjacent ones is the seam of the refractory fiber blanket 6.

[0055] In this embodiment, by setting the seam of the refractory fiber blanket 6 to be staggered from the gap between the refractory fiber modules 8, the diffusion of acidic gases is effectively avoided.

[0056] As a further preferred embodiment, the refractory fiber module 8 is laid on the refractory fiber blanket 6 and fixed by fasteners 7;

[0057] As a further preferred embodiment, it further includes a refractory fiber felt 9, and the refractory fiber felt 9 is arranged between the refractory fiber modules 8.

[0058] In this embodiment, by arranging the refractory fiber felt 9 between the refractory fiber modules 8, the diffusion of acidic gases is prevented. Moreover, when the fasteners 7 pass through the holes of the backing plate 5, high-temperature resistant glue needs to be applied in the holes to seal the gaps, further enhancing the sealing performance of the structure.

[0059] What is described herein is only the preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Modifications, supplements, or substitutions in a similar manner made by those skilled in the art to the specific embodiments described shall all be covered within the protection scope of the present utility model.

Claims

1. An RTO refractory insulation device for preventing gas corrosion, characterized in that, Including: RTO housing steel plate (3); An outer protection plate (1) and a thermal insulation layer (2) are sequentially arranged from outside to inside on the outside of the RTO housing steel plate (3); A metal film layer (4), a backing plate (5), a refractory fiber blanket (6), fasteners (7), and refractory fiber modules (8) are sequentially arranged from inside to outside on the inside of the RTO housing steel plate (3); The thermal insulation layer (2) is laid on the outside of the RTO housing steel plate (3), and the thickness of the thermal insulation layer (2) is 50 - 150 mm; The outer protection plate (1) is laid on the outside of the thermal insulation layer (2) for protecting the thermal insulation layer (2) and isolating the external environment; The metal film layer (4) is closely attached to the inside of the RTO housing steel plate (3).

2. The RTO refractory insulation device for preventing gas corrosion according to claim 1, characterized in that, The metal film layer (4) is an aluminum film layer.

3. The RTO refractory insulation device for preventing gas corrosion according to claim 1, characterized in that, The backing plate (5) is made of refractory material and is laid on the inside of the aluminum film (4).

4. A RTO refractory insulation device for preventing gas corrosion according to claim 1, characterized in that, The refractory fiber blanket (6) is laid on the backing plate (5), and the joints of the refractory fiber blanket (6) are staggered from the gaps between the refractory fiber modules (8).

5. A RTO refractory insulation device for preventing gas corrosion according to claim 1, characterized in that, The refractory fiber modules (8) are laid on the refractory fiber blanket (6) and fixed by fasteners (7).

6. The RTO refractory insulation device for preventing gas corrosion according to claim 1, characterized in that, It also includes a refractory fiber felt (9), and the refractory fiber felt (9) is arranged between the refractory fiber modules (8).

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