Smelting furnace for producing dried sand from waste thermal insulation materials

Abstract

The utility model discloses a melting furnace for producing dried sand from waste thermal insulation materials, which comprises a refractory brick furnace body, and the refractory brick furnace body is provided with a feed port, a flame nozzle, a melting chamber, a cooling chamber, a blast nozzle and a discharge port; a spiral feeder is arranged above the feeding hole of the refractory brick furnace body; the cross section of an inner cavity of the fusing chamber is in the shape of an irregular polygon or a circular arc, and a flaming opening is formed in one side of the fusing chamber and connected with a gas burner; one side of the cooling chamber is connected with the discharge hole of the refractory brick furnace body, and the other side of the cooling chamber is connected with the blower nozzle which is connected with the blower. According to the sintering furnace for producing the dried sand from the waste thermal insulation materials, in the sintering furnace, powdery materials obtained after the waste thermal insulation materials are crushed are radiated through high-temperature flames and high temperature in the hearth, fine thermal insulation material fibers form crystal particles in a molten state, and the crystal particles can be used as the dried sand after being cooled and crushed; the problem that mineral wool materials such as rock wool, glass wool and aluminum silicate wool are difficult to reutilize is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection, in particular to a smelting furnace for producing drying sand from waste thermal insulation materials. Background Art

[0002] Rock wool, glass wool, and aluminum silicate wool are all mineral wool. They are all fiber materials generated by centrifuging raw materials at high temperatures and then centrifuged at high speed. They are widely used in the insulation industry. The production of mineral wool and the elimination of insulation equipment will generate a large amount of waste insulation materials. If these waste materials are directly discarded, they will easily cause great damage to the environment and even directly endanger human health. If waste insulation materials are put back into production, not only will a large amount of fuel be consumed, but the production process will also produce a large amount of harmful gases and dust. The overall cost is higher than the output input. Therefore, how to use waste insulation materials is an issue that needs to be considered urgently.

[0003] River sand is a high-quality building material that can be used to produce various dry powder slurries. Excessive exploitation of river sand can easily damage the river ecology and bring hidden dangers to flood control and waterway transportation. Mineral wool such as rock wool, glass wool, and aluminum silicate wool are similar to river sand in physical composition, and there is also a high elimination rate in the construction industry, which provides operational possibilities for rock wool to replace river sand and machine-made sand. Utility Model Content

[0004] The utility model aims to provide a smelting furnace for producing drying sand from waste thermal insulation materials. In the smelting furnace, the crushed powdered waste thermal insulation materials are subjected to high-temperature flames and high-temperature radiation in the furnace, and the fine thermal insulation material fibers are formed into crystalline particles in a molten state, which can be used as drying sand after cooling and crushing, thereby solving the problem that mineral wool materials such as rock wool, glass wool, and aluminum silicate wool are difficult to reuse.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a smelting furnace for producing dried sand from waste thermal insulation materials, comprising a refractory brick furnace body, a spiral feeder, a gas burner and a blower, the refractory brick furnace body is provided with a feed port, a flame nozzle, a smelting chamber, a cooling chamber, an air blast port and a discharge port; the feed port is located at the upper end of the refractory brick furnace body, and a spiral feeder is provided above the feed port of the refractory brick furnace body; the smelting chamber is located in the cavity of the refractory brick furnace body and is connected to the feed port, a flame nozzle is provided on one side of the smelting chamber, and the flame nozzle is connected to the gas burner; the cooling chamber is located below the smelting chamber and is connected to the outlet of the smelting chamber; one side of the cooling chamber is connected to the discharge port of the refractory brick furnace body, and the other side is connected to the air blast port, and the air blast port is connected to the blower.

[0006] Preferably, the refractory brick furnace body is built in the furnace body inner shell, a furnace body outer shell is provided outside the furnace body inner shell, and a furnace body heat insulation layer is filled between the furnace body outer shell and the furnace body inner shell.

[0007] Preferably, the cross-section of the inner cavity of the smelting chamber is an irregular polygon or an arc, and the front end of the polygon is a fire baffle wall slope of 45°-70°.

[0008] Preferably, the sintering temperature in the sintering chamber is 1200-1800°C.

[0009] Preferably, a feeding funnel is provided above the spiral feeder, and the feeding funnel is used to hold solid waste powder.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] The smelting furnace for producing drying sand from waste thermal insulation materials is used to make the crushed powdered waste thermal insulation materials pass through high-temperature flames and high-temperature radiation in the furnace, so that the fine thermal insulation material fibers are formed into crystal particles in a molten state, which can be used as drying sand after cooling and crushing, thus solving the problem that mineral wool materials such as rock wool, glass wool, and aluminum silicate wool are difficult to reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is the first example of an irregular cross section of the inner cavity of the melting chamber of the utility model;

[0014] Figure 3 This is the second example of irregular cross section of the inner cavity of the melting chamber of the utility model;

[0015] Figure 4 This is the third example of the irregular cross section of the inner cavity of the melting chamber of the utility model;

[0016] Figure 5 This is the fourth example of an irregular cross section of the inner cavity of the melting chamber of the utility model.

[0017] In the figure: 1. refractory brick furnace body; 101. feed port; 102. flame nozzle; 103. melting chamber; 104. cooling chamber; 105. tuyere; 106. discharge port; 107. fire baffle wall slope; 2. furnace body inner shell; 3. furnace body insulation layer; 4. furnace body outer shell; 5. screw feeder; 501. feed hopper; 6. gas burner; 7. blower. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1 In this embodiment, a smelting furnace for producing drying sand from waste insulation materials comprises a refractory brick furnace body 1, a spiral feeder 5, a gas burner 6 and a blower 7. The refractory brick furnace body 1 is provided with a feed port 101, a flame nozzle 102, a smelting chamber 103, a cooling chamber 104, a blast port 105 and a discharge port 106; the feed port 101 is located at the upper end of the refractory brick furnace body 1, a spiral feeder 5 is provided above the feed port 101 of the refractory brick furnace body 1, and a feed hopper 501 is provided above the spiral feeder 5. The feed funnel 501 is used to hold solid waste powder; the smelting chamber 103 is located in the cavity of the refractory brick furnace body 1 and is connected to the feed port 101. A flame nozzle 102 is provided on one side of the smelting chamber 103, and the flame nozzle 102 is connected to the gas burner 6; the cooling chamber 104 is located below the smelting chamber 103 and is connected to the outlet of the smelting chamber 103; one side of the cooling chamber 104 is connected to the discharge port 106 of the refractory brick furnace body 1, and the other side is connected to the blast port 105, and the blast port 105 is connected to the blower 7.

[0020] The refractory brick furnace body 1 in this embodiment is built in the furnace inner shell 2, a furnace outer shell 4 is provided outside the furnace inner shell 2, and a furnace body heat insulation layer 3 is filled between the furnace body outer shell 4 and the furnace inner shell 2; wherein, the refractory brick furnace body 1 is built of refractory mud, the furnace inner shell 2 is ordinary carbon structural steel, the furnace body heat insulation layer 3 is aluminum silicate fiber felt, and the furnace body outer shell 4 is ordinary carbon structural steel.

[0021] like Figure 2-5As shown, in the above embodiment, the cross section of the inner cavity of the melting chamber 103 is an irregular polygon or arc shape, and the front end of the polygon is a 45°-70° fire baffle wall slope 107. The function of the slope is to facilitate the downward flow of the powder material and facilitate the flame to flow upward along the slope. The flame directed upward hits the top surface and then flows backward. The flame flowing backward hits the back and then flows downward until it is discharged from the bottom outlet. The advantages of this furnace: through a specific cross-sectional shape, the flame nozzle 102 is arranged at the rear and lower part of the cross section. The flame collides head-on with the powder material falling on the fire baffle wall slope 107 on the fire baffle wall slope 107. The melting temperature in the melting chamber 103 is 1200-1800℃. Under the impact of the strong airflow of the flame, the falling speed of the powder material slows down or stops, and even flows upward with the flame airflow in reverse. In the process again, the powder material is fully heated and melted, and formed into glass-like crystalline particles. The density of the crystalline particles increases, and their own gravity breaks through the impact of the flame and falls into the bottom outlet and is discharged.

[0022] Working principle: In the smelting furnace for producing drying sand from waste thermal insulation materials, the crushed powdered waste thermal insulation materials are uniformly fed into the smelting chamber 103 of the smelting furnace through the spiral feeder 5, and the gas burner 6 sends the high-temperature flame into the smelting chamber 103 through the flame nozzle 102, and meets the powdered material sliding down the fire baffle slope 107 of the smelting chamber 103, the powdered material is burned into crystal particles in a molten state and continues to slide down, and the high-temperature flame airflow is blocked by the fire baffle slope 107, forming a swirling flame flow toward the rear and upwards, which fully heats the smelting chamber 103, and the fully burned airflow slides into the cooling chamber 104 together with the crystal particles, and the air blast port 105 in the cooling chamber 104 blows external cold air at high speed through the blower 7, and the crystal particles cool down rapidly after meeting the cold air, and the particles stuck together quickly burst and are blown out of the discharge port 106 by the high-speed airflow, and the blown crystal particles can be used as drying sand.

[0023] To sum up: the utility model provides a smelting furnace for producing drying sand from waste thermal insulation materials. In the smelting furnace, the crushed powdered waste thermal insulation materials are radiated by high-temperature flames and high temperature (1200-1800°C) in the furnace, and the fine thermal insulation material fibers form crystalline particles in a molten state, which can be used as drying sand after cooling and crushing, solving the problem that mineral wool materials such as rock wool, glass wool, and aluminum silicate wool are difficult to reuse.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0025] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A melting furnace for producing dried sand from waste thermal insulation materials, comprising a refractory brick furnace body (1), a screw feeder (5), a gas burner (6) and a blower (7), characterized in that: The refractory brick furnace body (1) is provided with a feed port (101), a flame nozzle (102), a sintering chamber (103), a cooling chamber (104), a blast port (105) and a discharge port (106); the feed port (101) is located at the upper end of the refractory brick furnace body (1), and a spiral feeder (5) is provided above the feed port (101) of the refractory brick furnace body (1); the sintering chamber (103) is located in the cavity of the refractory brick furnace body (1) and is adjacent to the feed port (101). 01), a flame nozzle (102) is provided on one side of the sintering chamber (103), and the flame nozzle (102) is connected to the gas burner (6); the cooling chamber (104) is located below the sintering chamber (103) and is connected to the outlet of the sintering chamber (103); one side of the cooling chamber (104) is connected to the discharge port (106) of the refractory brick furnace body (1), and the other side is connected to the blast port (105), and the blast port (105) is connected to the blower (7).

2. A smelting furnace for producing dried sand from waste thermal insulation materials according to claim 1, characterized in that: The refractory brick furnace body (1) is built in the furnace inner shell (2), a furnace outer shell (4) is provided outside the furnace inner shell (2), and a furnace heat insulation layer (3) is filled between the furnace outer shell (4) and the furnace inner shell (2).

3. The sintering furnace for producing dried sand from waste thermal insulation materials according to claim 1, characterized in that: The cross section of the inner cavity of the sintering chamber (103) is an irregular polygon or an arc shape, and the front end of the polygon is a fire baffle wall slope (107) with an angle of 45°-70°.

4. The smelting furnace for producing dried sand from waste thermal insulation materials according to claim 1, characterized in that: The sintering temperature in the sintering chamber (103) is 1200-1800°C.

5. The sintering furnace for producing dried sand from waste thermal insulation materials according to claim 1, characterized in that: A feeding funnel (501) is correspondingly provided above the spiral feeder (5), and the feeding funnel (501) is used to contain solid waste powder.

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