Improved synthetic furnace upper furnace cover

Abstract

The utility model discloses an improved upper furnace cover of a synthetic furnace, which comprises an outer shell (1), an inner shell (2) arranged below the outer shell (1), a cavity formed between the outer shell (1) and the inner shell (2), a transversely distributed heat insulation plate (3) arranged in the cavity, a heat preservation cavity (31) formed between the heat insulation plate (3) and the inner shell (2), a heat preservation layer (32) arranged in the heat preservation cavity (31), and a cooling cavity (33) formed between the heat insulation plate (3) and the outer shell (1). A snake-shaped surrounding inner water pipe (34) is arranged in the cooling cavity (33), an annular outer water pipe (35) is arranged on the outer surface of the outer shell (1), and a nozzle (36) is arranged on the outer water pipe (35). The utility model has the characteristics of strong sealing performance and low possibility of high-temperature damage.

Description

Technical Field

[0001] The utility model relates to a furnace cover, in particular to an improved upper furnace cover of a synthetic furnace. Background Art

[0002] The furnace cover on the synthetic furnace is an important part of the synthetic furnace, which is usually used to close the furnace body to maintain the high temperature inside the furnace and prevent heat dissipation. Since the high-temperature heat inside the furnace will be directly transferred to the furnace cover, resulting in a relatively high temperature of the furnace cover, the furnace cover material used must be able to withstand the high-temperature environment inside the synthetic furnace.

[0003] Although refractory materials or superalloys are usually selected for the existing furnace covers, under the influence of high temperature for a long time, thermal damage to the furnace cover is likely to occur, reducing its service life. Moreover, the furnace cover will bear a certain mechanical pressure during operation. Under the long-term action of high temperature and high pressure, problems such as cracks, loose structure, deformation, and damaged sealing performance are likely to occur in the furnace cover, which not only affects the normal closing and opening of the upper furnace cover, but also affects the stability of the pressure inside the furnace and the airtightness of the furnace body, resulting in the leakage of heat and harmful substances inside the furnace, and reducing the working efficiency and working safety of the synthetic furnace. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an improved upper furnace cover of a synthetic furnace. The utility model has the characteristics of strong sealing performance and not being easily damaged by high temperature.

[0005] The technical solution of the utility model: An improved upper furnace cover of a synthetic furnace includes an outer shell body. An inner shell body is provided below the outer shell body. A cavity is formed between the outer shell body and the inner shell body. Heat insulation plates are horizontally distributed in the cavity. A heat preservation cavity is formed between the heat insulation plates and the inner shell body. A heat preservation layer is provided in the heat preservation cavity. A cooling cavity is formed between the heat insulation plates and the outer shell body. An inner water pipe is serpentinely wound in the cooling cavity. An annular outer water pipe is provided on the outer surface of the outer shell body. Nozzles are provided on the outer water pipe.

[0006] In the aforementioned improved upper furnace cover of a synthetic furnace, the middle parts of the top ends of the outer shell body and the inner shell body both bulge upward correspondingly.

[0007] In the aforementioned improved upper furnace cover of a synthetic furnace, the periphery of the inner shell body extends upward along the inside of the outer shell body, and the periphery of the outer shell body extends downward to the lower part of the inner shell body.

[0008] In the aforementioned improved upper furnace cover of a synthetic furnace, refractory layers are coated on the outer parts of the outer water pipe and the inner water pipe.

[0009] In the aforementioned improved upper furnace cover of a synthetic furnace, a number of longitudinally distributed longitudinal reinforcing plates are also provided in the cavity. Through holes located in the cooling cavity are provided on the longitudinal reinforcing plates.

[0010] In the above-mentioned improved upper furnace cover of the synthesis furnace, the heat insulation layer is made of a ceramic fiber layer; the heat insulation plate is made of a heat insulation graphite plate.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] The upper furnace cover of this application includes an outer shell and an inner shell, forming a double-layer structure, which improves the strength and sealing performance of the upper furnace cover; the heat insulation plate provided therein plays a heat insulation role, and the heat insulation layer provided plays a heat preservation role, thereby reducing the leakage of heat and harmful substances during the operation of the synthesis furnace, ensuring the working efficiency and safety of the synthesis furnace; an inner water pipe is arranged in the cooling cavity, and cooling water is introduced into the inner water pipe to cool the upper furnace cover; an outer water pipe is arranged on the outer surface of the outer shell, cooling water is introduced into the outer water pipe, and the cooling water is directly sprayed on the surface of the upper furnace cover through a nozzle, so that a cooling water film is formed on the surface of the upper furnace cover, quickly absorbing heat to cool the upper furnace cover; this application reduces the temperature of the upper furnace cover from both inside and outside, improves the cooling efficiency, protects the upper furnace cover from being damaged by high temperature, reduces thermal stress, prolongs the service life, and ensures the safe operation of the furnace body. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present utility model.

[0014] Figure 2 is a schematic structural diagram of the inner water pipe.

[0015] Figure 3 is a schematic structural diagram of the outer water pipe.

[0016] The reference signs in the drawings are: 1. Outer shell; 2. Inner shell; 3. Heat insulation plate; 31. Heat insulation cavity; 32. Heat insulation layer; 33. Cooling cavity; 34. Inner water pipe; 35. Outer water pipe; 36. Nozzle; 4. Longitudinal reinforcing plate; 41. Through hole. Detailed Description of the Invention

[0017] The following further describes the present utility model in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the present utility model.

[0018] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "arranged", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0019] Embodiment:

[0020] As Figures 1 - 3 shown, an improved upper furnace cover of a synthesis furnace includes an outer shell 1. A inner shell 2 is provided below the outer shell 1. A cavity is formed between the outer shell 1 and the inner shell 2. A horizontally distributed heat insulation plate 3 is provided in the cavity. A heat preservation cavity 31 is formed between the heat insulation plate 3 and the inner shell 2. A heat preservation layer 32 is provided in the heat preservation cavity 31. A cooling cavity 33 is formed between the heat insulation plate 3 and the outer shell 1. A serpentine inner water pipe 34 is provided in the cooling cavity 33. An annular outer water pipe 35 is provided on the outer surface of the outer shell 1. Nozzles 36 are provided on the outer water pipe 35.

[0021] The upper furnace cover of this application includes an outer shell 1 and an inner shell 2, forming a double-layer structure, which improves the strength and sealing performance of the upper furnace cover; the heat insulation plate 3 provided therein plays a heat insulation role, and the heat preservation layer 32 provided plays a heat preservation role, thereby reducing the leakage of heat and harmful substances during the operation of the synthesis furnace, ensuring the working efficiency and safety of the synthesis furnace; an inner water pipe 34 is provided in the cooling cavity 33, cooling water is introduced into the inner water pipe 34, and a cycle is formed in cooperation with a cooling water pump and a cooling tower to achieve cooling of the upper furnace cover; an outer water pipe 35 is provided on the outer surface of the outer shell 1, cooling water is introduced into the outer water pipe 35, and the cooling water is directly sprayed on the surface of the upper furnace cover through the nozzles 36, so that a cooling water film is formed on the surface of the upper furnace cover, quickly absorbing heat to achieve cooling of the upper furnace cover; this application reduces the temperature of the upper furnace cover from both inside and outside, improves the cooling efficiency, protects the upper furnace cover from being damaged by high temperature, reduces thermal stress, extends the service life, and ensures the safe operation of the furnace body.

[0022] The middle parts of the top ends of the outer shell 1 and the inner shell 2 both bulge upward correspondingly. The outer shell 1 and the inner shell 2 with bulges in the middle enable the upper furnace cover to withstand greater pressure and prevent it from being compressed and deformed when a negative pressure is drawn inside the synthesis furnace.

[0023] The periphery of the inner shell 2 extends upward along the inside of the outer shell 1, and the periphery of the outer shell 1 extends downward to the lower part of the inner shell 2. The upward extension of the periphery of the inner shell 2 forms a double-layer isolation structure with the outer shell 1, thereby improving the strength and sealing performance of the upper furnace cover; and the downward extension of the periphery of the outer shell 1 improves the sealing performance between the upper furnace cover and the synthesis furnace, reduces heat loss, prevents the leakage of harmful substances, and ensures the thermal efficiency and operation safety performance of the synthesis furnace.

[0024] Fire-resistant layers are coated on the exteriors of the outer water pipe 35 and the inner water pipe 34. Coating the fire-resistant layers improves the heat resistance and service life of the outer water pipe 35 and the inner water pipe 34.

[0025] A plurality of longitudinally reinforcing plates 4 distributed in a ring shape are further arranged in the cavity. Through holes 41 located in the cooling cavity 33 are arranged on the longitudinally reinforcing plates 4. The arranged longitudinally reinforcing plates 4 can enhance the compressive capacity of the upper furnace cover, and the through holes 41 on the longitudinally reinforcing plates 4 facilitate the flow of cooling air in the cooling cavity 33, improve the heat exchange effect, and enhance the cooling effect on the upper furnace cover.

[0026] The heat insulation layer 32 is made of a ceramic fiber layer; the heat insulation plate 3 is made of a heat insulation graphite plate. The inner shell 2 is made of a heat insulation and heat preservation material.

[0027] Parts not described in detail in the present utility model are prior arts and thus will not be specifically elaborated herein.

Claims

1. An improved upper furnace cover of a synthetic furnace, characterized in that: It includes an outer housing (1). An inner housing (2) is provided below the outer housing (1). A cavity is formed between the outer housing (1) and the inner housing (2). A horizontally distributed heat insulation board (3) is provided in the cavity. A heat preservation cavity (31) is formed between the heat insulation board (3) and the inner housing (2). A heat preservation layer (32) is provided in the heat preservation cavity (31). A cooling cavity (33) is formed between the heat insulation board (3) and the outer housing (1). A serpentine inner water pipe (34) is provided in the cooling cavity (33). An annular outer water pipe (35) is provided on the outer surface of the outer housing (1). Nozzles (36) are provided on the outer water pipe (35).

2. The improved upper furnace cover of the synthetic furnace according to claim 1, characterized in that: The middle part of the top end of the outer housing (1) and the middle part of the top end of the inner housing (2) both bulge upward correspondingly.

3. An improved upper furnace cover of a synthesis furnace according to claim 1, characterized in that: The periphery of the inner housing (2) extends upward along the inside of the outer housing (1), and the periphery of the outer housing (1) extends downward to the lower part of the inner housing (2).

4. An improved upper furnace cover of a synthesis furnace according to claim 1, characterized in that: Fire-resistant layers are coated on the exteriors of the outer water pipe (35) and the inner water pipe (34).

5. An improved upper furnace cover of a synthetic furnace according to claim 1, characterized in that: A number of longitudinally distributed longitudinal strengthening plates (4) are also provided in the cavity. Through holes (41) located in the cooling cavity (33) are provided on the longitudinal strengthening plates (4).

6. An improved upper furnace cover of a synthetic furnace according to claim 1, characterized in that: The heat preservation layer (32) adopts a ceramic fiber layer; the heat insulation board (3) adopts a heat insulation graphite board.

Images