Combustion furnace hearth structure

Abstract

A combustion furnace hearth structure comprises a combustion furnace shell, ceramic fiber blocks are laid on the top and the side face of the combustion furnace shell, a light heat preservation pouring material is poured at the bottom of the combustion furnace shell, a supporting steel plate is laid at the bottom of the light heat preservation pouring material, and in the pouring process of the pouring material, the supporting steel plate is laid at the bottom of the pouring material and bonded with the pouring material into a whole. The bottom of the supporting steel plate is connected with a second heat preservation layer, and I-shaped steel is arranged below the supporting steel plate and supports the whole combustion furnace. Compared with the prior art, the hearth structure of the combustion furnace has the advantages that the bottom of the combustion furnace is made of the light heat preservation castable which is used as a heat preservation material instead of an existing ceramic fiber module, the castable is high in strength and bearing capacity and cannot be crushed, and meanwhile the second heat preservation layer is arranged below the pouring layer, so that the heat preservation effect is good; the structure not only solves the problems of load bearing and maintenance, but also ensures the heat preservation effect.

Description

Technical Field

[0001] The utility model relates to the field of combustion furnace equipment, in particular to a combustion furnace hearth structure. Background Art

[0002] In the production of insulation boards and copper-clad laminates, impregnation of reinforcing materials with resin adhesive is a widely used production process. For example, glass fiber cloth, wood pulp paper, carbon fiber or cotton cloth are impregnated with resin adhesive. After the organic solvent in the resin adhesive is recovered, such as waste gas, it is decomposed at high temperature in a combustion furnace. The heat generated is provided to the drying equipment through heat exchange, thus forming an environmentally friendly, energy-saving and recyclable system; the combustion furnace equipment is mainly composed of a burner, a furnace, an exhaust gas heat exchanger, an air heat exchanger, insulation, a shell and a matching fan.

[0003] like Figure 2 and Figure 3 As shown, the existing combustion furnace shell 1 is a square structure formed by welding Q345 boiler steel plates, and is surrounded by 300x300x300 ceramic fiber modules 2 as insulation materials. The furnace part has a burner 3, a temperature measuring thermocouple 4, a vacuum pressure gauge 5 and other equipment and components, so an inspection port 6 is provided, and the above equipment needs to be inspected and adjusted; in addition, the furnace part is also distributed with porous heat storage ceramics 7, and the heat storage ceramics are adjusted and placed in the furnace space according to parameters such as the exhaust gas volume and the furnace temperature. On the one hand, the bottom of the furnace has to bear the pressure of personnel maintenance, and on the other hand, it has to bear the weight of the heat storage ceramics. The above aspects will cause the bottom ceramic fiber module to deform due to pressure, thereby forming gaps, affecting the insulation effect.

[0004] Secondly, the exhaust gas heat exchanger 8 and the hot air heat exchanger 9 of the combustion furnace are both stainless steel tube structures, weighing about 11.7 tons, with a bottom pressure-bearing area of ​​4.5㎡, equivalent to a pressure of 0.026MPa. However, since the original structural ceramic fiber module is a loose structure and does not have pressure resistance, the original heat exchanger part is placed on the ceramic fiber module, which will compress the insulation layer and affect the insulation effect. In addition, during long-term operation, the deformation of the heat exchanger after being heated will destroy the dense structure of the insulation layer, which will also reduce the insulation effect. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a combustion furnace structure in view of the above-mentioned deficiencies in the prior art. To solve the above-mentioned technical problem, the technical solution adopted by the present invention is:

[0006] A combustion furnace chamber structure includes a combustion furnace shell, ceramic fiber blocks are laid on the top and sides of the combustion furnace shell, lightweight thermal insulation castable is cast on the bottom of the combustion furnace shell, and a supporting steel plate is laid on the bottom of the lightweight thermal insulation castable. During the pouring process of the lightweight thermal insulation castable, the supporting steel plate is laid on the bottom of the lightweight thermal insulation castable and bonded to the lightweight thermal insulation castable into a whole, a second thermal insulation layer is connected to the bottom of the supporting steel plate, an I-beam is arranged under the supporting steel plate, and the I-beam supports the entire combustion furnace.

[0007] Furthermore, the lightweight thermal insulation castable is made of hollow alumina ball castable.

[0008] Furthermore, the supporting steel plate is made of boiler steel plate.

[0009] Furthermore, the second thermal insulation layer is made of aluminum silicate ceramic fiber blanket, and the aluminum silicate ceramic fiber blanket is coated on the bottom of the supporting steel plate.

[0010] Compared with the prior art, the utility model discloses a combustion furnace furnace structure, in which a lightweight thermal insulation castable is used as the thermal insulation material at the bottom of the combustion furnace to replace the existing ceramic fiber module. Since the castable has high strength and strong load-bearing capacity and will not be crushed, and a second thermal insulation layer is provided under the casting layer, this structure not only solves the load-bearing and maintenance problems, but also ensures the thermal insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a structural schematic diagram of the original combustion furnace hearth;

[0013] Figure 3 It is a schematic diagram of the structure inside the furnace of the original combustion furnace;

[0014] Among them, 100, combustion furnace shell, 200, lightweight thermal insulation castable, 300, supporting steel plate, 400, second thermal insulation layer, 500, I-beam. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present utility model will be described clearly and completely below.

[0016] like Figure 1As shown, a furnace structure of a combustion furnace includes a combustion furnace shell 100, and 300x300x300 ceramic fiber blocks are laid on the top and sides of the combustion furnace shell 100 as insulation materials. A lightweight insulation castable 200 is poured at the bottom of the combustion furnace shell 100. The lightweight insulation castable 200 adopts alumina hollow ball castable. The alumina hollow ball castable is a high-performance castable material with excellent properties such as light weight, high strength, fire resistance, and corrosion resistance. Among them, the compressive strength is ≥12MPa and the temperature resistance reaches 1600℃. A supporting steel plate 300 is laid at the bottom of the lightweight insulation castable 200. The supporting steel plate 300 adopts boiler steel plate. During the casting process of the castable, the supporting steel plate 300 is laid on the casting. The bottom of the building material is bonded to the castable material as a whole, and a second insulation layer 400 is connected to the bottom of the support steel plate 300. Since the thermal conductivity of the alumina hollow ball castable is 0.47W / mk at 600°C, and the thermal conductivity of the ceramic fiber module is 0.185W / mk at 600°C, a second insulation layer 400 is added to the bottom of the support steel plate 300. The second insulation layer 400 adopts an aluminum silicate ceramic fiber blanket, and the thermal conductivity of the aluminum silicate ceramic fiber blanket at 600°C is 0.155W / mk. The aluminum silicate ceramic fiber blanket is coated on the bottom of the support steel plate 300 to achieve a thermal insulation effect. An I-beam 500 is arranged under the support steel plate 300, and the I-beam 500 supports the entire combustion furnace.

[0017] In this embodiment, a 150 mm thick lightweight thermal insulation castable 200 is cast at the bottom of the combustion furnace shell 100, a 6 mm thick boiler steel plate 300 is laid at the bottom of the lightweight thermal insulation castable 200, and a 150 mm thick aluminum silicate ceramic fiber blanket is coated at the bottom of the boiler steel plate 300.

[0018] The present invention is not limited to the described embodiments. Those skilled in the art may make some modifications or changes without departing from the spirit and scope of the present invention, that is, within the scope of disclosure. Therefore, the scope of protection of the present invention shall be subject to the scope defined in the claims.

Claims

1. A combustion furnace structure, comprising a combustion furnace shell, the top and side of the combustion furnace shell are paved with ceramic fiber blocks, Features: A lightweight thermal insulation castable is cast at the bottom of the combustion furnace shell, and a supporting steel plate is laid at the bottom of the lightweight thermal insulation castable. During the pouring process of the lightweight thermal insulation castable, the supporting steel plate is laid on the bottom of the lightweight thermal insulation castable and bonded to the lightweight thermal insulation castable into a whole. A second thermal insulation layer is connected to the bottom of the supporting steel plate, and an I-beam is arranged under the supporting steel plate, which supports the entire combustion furnace.

2. A combustion furnace structure according to claim 1, Features: The lightweight thermal insulation castable is made of hollow alumina ball castable.

3. A combustion furnace structure according to claim 1, Features: The supporting steel plate is made of boiler steel plate.

4. A combustion furnace structure according to claim 1, Features: The second thermal insulation layer is made of aluminum silicate ceramic fiber blanket, and the aluminum silicate ceramic fiber blanket is coated on the bottom of the supporting steel plate.

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