A method and production line for producing dried sand from waste thermal insulation materials

Abstract

The present invention discloses a method and production line for producing dried sand from waste insulation materials, wherein waste insulation materials (including mineral wool such as rock wool, glass wool, aluminum silicate wool, etc.) are successively crushed, separated from impurities, burned and screened to obtain the final product, dried sand. The present invention adopts the method and production line for producing dried sand from waste insulation materials of the above structure, realizes the physical transformation of waste insulation materials into dried sand, saves resources, and the obtained dried sand is cleaner and can directly replace river sand and machine-made sand.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection, and in particular to a method and a production line 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 speed after high-temperature melting. 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, it will not only consume a lot of fuel, but also produce a lot of harmful gases and dust during the production process. 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. Summary of the invention

[0004] The purpose of the present invention is to provide a method and production line for producing dried sand from waste thermal insulation materials, so as to solve the problem that mineral wool materials such as rock wool, glass wool, aluminum silicate wool, etc. are difficult to reuse.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for producing dried sand from waste thermal insulation materials, comprising the following steps:

[0007] S1. The waste insulation materials are introduced into the drum crusher. The materials are transformed from blocks into large particles by mutual collision, and plastic, cloth, rubber and iron-containing impurities are removed;

[0008] S2. The materials produced in the above process are introduced into a hammer crusher, and the materials are hit by a heavy hammer to convert the large particles into fine particles;

[0009] S3, introducing the material produced by the above process into an incinerator, burning the surface of the material to transform the material from a fibrous body into a vitreous body;

[0010] S4. The materials produced in the above process are introduced into a screening machine, the mesh size of the screen is adjusted, and the final required dried sand is selected.

[0011] Preferably, in the step S1, the particle size of the large granular material is less than 100 mm; and in the step S2, the particle size of the fine granular material is less than 30 mm.

[0012] Preferably, in step S3, the temperature of the incinerator is 500-900°C.

[0013] Preferably, in the step S4, the screening machine is provided with a multi-layer screen, and the dried sand enters the screening machine to screen out defective material, coarse sand, medium sand, fine sand and powder; wherein the coarse sand, medium sand and fine sand are used to prepare cement mortar, the powder is used to synthesize putty powder, and the defective material is reintroduced into the hammer crusher.

[0014] Correspondingly, the present application proposes a production line for producing dried sand from waste insulation materials, including a drum crusher, a hammer crusher, an incinerator and a screening machine, wherein adjacent equipment relies on a conveyor belt to achieve material transmission; the drum crusher breaks up the material by rotation and grinding, and its drum wall is a screen for separating plastics, cloth and rubber that cannot be broken; a magnetic separation module is provided in the transmission part of the drum crusher for separating iron impurities in the material; the hammer crusher relies on a heavy hammer to further break up the material; a heating module is provided inside the incinerator for heating or burning the material to transform the material from a fibrous body into a glass body; the screening machine is tilted, and multiple layers of screens are arranged inside it, which relies on rotation to screen the material and output the dried sand.

[0015] Preferably, the interior of the screening machine is divided into multiple screening chambers by a tubular screen, and a spiral material guide plate is arranged in the screening chamber along the length direction, and the material guide plate extends to the discharge end of the screening machine; the discharge end of the screening machine is divided into multiple layers of nested discharge ports, and the discharge ports correspond to the screening chambers one by one.

[0016] The present invention adopts the above method and production line to crush, separate impurities, burn and screen the waste insulation materials in sequence to obtain dried sand, thereby realizing the secondary utilization of the waste insulation materials and saving resources. The obtained dried sand is cleaner and can directly replace river sand and machine-made sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a process flow chart of an embodiment of the present invention;

[0018] Figure 2 A diagram of a production line device according to an embodiment of the present invention;

[0019] Figure 3 It is a cross-sectional view of a double-layer drum screening machine in an embodiment of the present invention;

[0020] Figure 4 It is a plan view of the discharge end of the double-layer drum screening machine in an embodiment of the present invention.

[0021] Reference numerals

[0022] 1. Feed end; 2. Secondary screening chamber; 3. Primary screening chamber; 4. Material guide plate; 5. First screen; 6. Second screen; 7. Discharge end; 8. Coarse material outlet; 9. Fine material outlet. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1 A method for producing dried sand from waste thermal insulation materials is shown, wherein the waste thermal insulation materials are processed into dried sand, comprising the following steps:

[0025] S1. Introducing waste mineral wool insulation materials into a drum crusher, and transforming the materials from blocks into large particles by mutual collision of the materials, and removing plastics, cloth, rubber and iron-containing impurities; in this embodiment, the particle size of the large particle material is less than 100 mm;

[0026] S2, introducing the material produced in the above process into a hammer crusher, and using a heavy hammer to hit the material, so that the material is converted from large particles to fine particles; in this embodiment, the particle size of the fine particles is less than 30 mm;

[0027] S3, introducing the material produced in the above process into an incinerator at a temperature of 500-900°C, burning the surface of the material to transform the material from a fibrous body into a vitreous body;

[0028] S4. The materials produced in the above process are introduced into the screening machine, the mesh size of the screen is adjusted, and the final required dried sand is selected. The screening machine is equipped with multiple layers of screens. The dried sand enters the screening machine and is screened out into inferior materials (particle size 1-30mm), coarse sand (particle size 0.5-1mm), medium sand (particle size 0.25-0.5mm), fine sand (particle size 0.125-0.25mm), and powder (particle size less than 0.125mm); among them, coarse sand, medium sand, and fine sand are used to prepare cement mortar, and powder is used to synthesize putty powder. The inferior materials are re-introduced into the hammer crusher.

[0029] like Figure 2As shown, this embodiment corresponds to the above method and also proposes a production line for producing dried sand from waste insulation materials, including a drum crusher, a hammer crusher, an incinerator and a screening machine, and the adjacent equipment relies on a conveyor belt to realize material transmission. The drum crusher breaks the material by rotation and grinding, and its cylinder wall is a screen, which is used to separate plastic, cloth, and rubber impurities that cannot be broken; the transmission part is provided with a magnetic separation module, which is used to separate iron impurities in the material; the hammer crusher relies on a heavy hammer to further break the material; a heating module is provided inside the incinerator, which is used to heat or burn the material to convert the material from a fiber body to a glass body; the screening machine is tilted, and multiple layers of screens are provided inside it, which relies on rotation to screen the material and export the dried sand.

[0030] like Figure 3-4 As shown, taking the two-stage screening machine as an example, the screening machine has two layers of tubular screens to divide the first-stage screening chamber 3 and the second-stage screening chamber 2. A spiral material guide plate 4 is arranged in the second-stage screening chamber 2 along the length direction, and the material guide plate 4 extends to the discharge end of the screening machine. The discharge end of the screening machine is divided into a nested secondary material port 8 and a sand material port 9. The secondary material port 8 is used to discharge the material from the first-stage screening chamber 3, and the sand material port 9 is used to discharge the material from the second-stage screening chamber 2.

[0031] The material enters from the feed end 1 of the screening machine, and the screening machine starts to rotate. In the primary screening chamber 3, the finer material passes through the first screen 5 and enters the secondary screening chamber 2, and the remaining large particles are discharged from the secondary material port 8, and then sent back to the hammer crusher for crushing. In the secondary screening chamber 2, the finer material passes through the second screen 6 and flows out of the screening machine, and the dried sand is discharged from the sand material port 9 driven by the guide plate 4. The finer material flowing out from the bottom of the screening machine can also be collected and used as filling aggregate for other dry powder slurries (such as putty powder). During the entire screening process, three materials can be output at the same time, and there is no waste of materials.

[0032] In summary, the present invention adopts the above method and production line to realize the transformation of waste rock wool into dried sand, making full use of resources. Moreover, the produced dried sand is cleaner, has almost no soil components, and can directly replace river sand and machine-made sand.

[0033] The above are specific embodiments of the present invention, but the protection scope of the present invention should not be limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention, so the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A method for producing dried sand from waste thermal insulation materials, characterized in that: The steps include: S1. The waste insulation materials are introduced into the drum crusher. The materials are transformed from blocks into large particles by mutual collision, and plastic, cloth, rubber and iron-containing impurities are removed; S2. The materials produced in the above process are introduced into a hammer crusher, and the materials are hit by a heavy hammer to convert the large particles into fine particles; S3, introducing the material produced by the above process into an incinerator, burning the surface of the material to transform the material from a fibrous body into a vitreous body; S4, introducing the materials produced by the above process into a screening machine, adjusting the mesh size of the screen, and selecting the final required dried sand; It also includes a production line for producing dried sand from waste insulation materials, which includes a drum crusher, a hammer crusher, an incinerator and a screening machine, and the adjacent equipment relies on a conveyor belt to realize material transmission; the drum crusher breaks the material by rotating and grinding, and its drum wall is a screen, which is used to separate plastic, cloth, and rubber impurities that cannot be broken; the transmission part of the drum crusher is provided with a magnetic separation module, which is used to separate iron impurities in the material; the hammer crusher further breaks the material by a heavy hammer; a heating module is provided inside the incinerator, which is used to heat or burn the material to convert the material from a fiber body to a glass body; the screening machine is inclined, and multiple layers of screens are provided inside it, which relies on rotation to screen the material and output the dried sand; The interior of the screening machine is divided into multiple screening cavities by a tubular screen, and a spiral material guide plate is arranged in the screening cavity along the length direction, and the material guide plate extends to the discharge end of the screening machine; the discharge end of the screening machine is divided into multiple layers of discharge ports that are nested, and the discharge ports correspond to the screening cavities one by one.

2. The method for producing dried sand from waste thermal insulation materials according to claim 1, characterized in that: In the step S1, the particle size of the large granular material is less than 100 mm; in the step S2, the particle size of the fine granular material is less than 30 mm.

3. The method for producing dried sand from waste thermal insulation materials according to claim 1, characterized in that: In the step S3, the temperature of the incinerator is 500-900°C.

4. The method for producing dried sand from waste thermal insulation materials according to claim 1, characterized in that: In the step S4, the screening machine is provided with a multi-layer screen, and the dried sand enters the screening machine to screen out inferior material, coarse sand, medium sand, fine sand, and powder; wherein the coarse sand, medium sand, and fine sand are used to prepare cement mortar, the powder is used to synthesize putty powder, and the inferior material is reintroduced into the hammer crusher.

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