A porous oil fume separation plate and preparation method thereof

Abstract

The present invention discloses a porous oil fume separation plate and a preparation method thereof, wherein the porous oil fume separation plate comprises a porous foam metal plate and a glaze coated on the porous foam metal plate. The preparation method comprises first preparing the glaze slurry, and then immersing the porous foam metal plate in the glaze slurry twice, drying the porous foam metal plate for different time periods, and then sintering and cooling the porous oil fume separation plate at high temperature. The porous oil fume separation plate of the present invention has low cost, high interception efficiency, low wind resistance, long service life, high fireproof grade, and easy maintenance. The porous oil fume separation plate can solve many problems existing in the field of oil fume separation of traditional materials, such as high cost, inconvenient cleaning and maintenance, acid and alkali resistance, and easy rust.

Description

Technical Field

[0001] The invention relates to the field of oil fume separation plates, and in particular to a porous oil fume separation plate and a preparation method thereof. Background Art

[0002] Fire accidents in kitchen fume ducts occur frequently and are difficult to extinguish. They can only be left to burn out the flue and then go out on their own. The burning can easily lead to flue collapse and fires in other adjacent buildings, seriously affecting the safety of life and property.

[0003] At present, the main oil fume separation plates on the market are stainless steel filter mesh, ceramic filter mesh and foam iron-nickel mesh. The stainless steel mesh is easy to be misplaced during cleaning, which is inconvenient to clean and maintain. The ceramic filter mesh is expensive and easy to break during cleaning. The foam iron-nickel mesh is easy to rust during cleaning, which affects its service life.

[0004] There have been relevant reports on the development of oil fume separation plates, such as:

[0005] The Chinese patent application number CN202210526884.9 discloses a porous oil fume filter material and a method for making the same, which uses a porous iron-nickel foam plate as the oil fume filter material, but has the disadvantages of being acid- and alkali-resistant and easy to rust;

[0006] A Chinese patent with application number CN202210519768.4 discloses a method for producing a porous foam oil fume filter material with low cost and high purification efficiency. The oil fume filter material is produced by spraying or dipping a protective layer on the surface of foam iron-nickel, but has the disadvantages of being acid- and alkali-resistant and easy to rust.

[0007] The above-mentioned oil fume separation plate has many problems such as inconvenient cleaning and maintenance, acid and alkali resistance, and easy rust.

[0008] In view of this, it is necessary to improve the existing technology to solve the above problems. Summary of the invention

[0009] The purpose of the present invention is to provide a porous oil fume separation plate and a preparation method thereof, which is used to solve the problems existing in the background technology by coating glaze on the porous metal foam plate.

[0010] The present invention is achieved through the following technical solutions:

[0011] A porous oil fume separation plate comprises a porous foam metal plate and a glaze coated on the porous foam metal plate.

[0012] Furthermore, the porous foam metal plate has a porosity of 15-30 ppi, and is made of any one of foam copper, foam iron, foam nickel or foam iron-nickel.

[0013] Furthermore, the glaze includes the following components (all in mass percentage): SiO2: 28%-33%, Al2O3: 4%-5%, Na2O: 12%-15%, K2O: 3%-5%, B2O3: 15%-18%, CaO: 6%-8%, ZnO: 2%-3%, NaBF4: 3%-5%, SrO: 2%-3%, Li2O: 1%-2%, BaO: 2%-3%, CoO+NiO+CuO: 3%-5%, and the above components are all in powder form.

[0014] Furthermore, the glaze is 200-500 mesh.

[0015] A method for preparing a porous oil fume separation plate comprises the following steps:

[0016] Step 1: Weigh the glaze components according to the proportion, add the glaze powder into the water and stir evenly to form a glaze slurry with a specific gravity of 70-100;

[0017] Step 2: Apply glaze slurry for the first time, immerse the porous foam metal completely in the glaze slurry, so that the porous foam metal wire diameter is evenly covered with glaze slurry;

[0018] Step 3: First drying: drying the porous foam metal plate with glaze slurry at a temperature of 90-100°C for 5-15 minutes;

[0019] Step 4: Apply glaze slurry for the second time, immerse the porous foam metal plate dried for the first time in step 3 into the glaze slurry again, so that the porous foam metal wire diameter is evenly covered with glaze slurry;

[0020] Step 5: Second drying: drying the porous foam metal plate coated with glaze slurry in step 4 again, the drying temperature is 95-105°C, and the drying time is 1-1.5h;

[0021] Step 6: Sintering, sintering the porous foam metal plate dried for the second time in step 5, the sintering temperature is 950-1100° C., and the sintering time is 5-10 minutes;

[0022] Step seven: Cooling, cooling the porous foam metal plate sintered in step six to obtain a porous oil fume separation plate.

[0023] Furthermore, in step 2 and step 4, the weight of the glaze slurry applied is 900-1100 g per square meter of the porous metal foam board.

[0024] Furthermore, in step 2, the porous foam metal plate has a porosity of 15-30 ppi, and is made of any one of foam copper, foam iron, foam nickel, or foam iron-nickel.

[0025] Furthermore, in step one, the glaze includes the following components (all in mass percentage): SiO2: 28%-33%, Al2O3: 4%-5%, Na2O: 12%-15%, K2O: 3%-5%, B2O3: 15%-18%, CaO: 6%-8%, ZnO: 2%-3%, NaBF4: 3%-5%, SrO: 2%-3%, Li2O: 1%-2%, BaO: 2%-3%, CoO+NiO+CuO: 3%-5%, and the above components are all in powder form.

[0026] Furthermore, in step 1, the glaze is 200-500 mesh.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The porous oil fume separation plate provided by the present invention comprises a porous foam metal plate and a glaze coated on the porous foam metal plate, wherein the porous foam metal plate has a three-dimensional hole structure, and the three-dimensional hole structure is coated with a glaze layer with excellent fire retardant, heat dissipation and acid and alkali resistance. The porous foam metal plate and the glaze layer are combined to decompose and intercept the passing grease layer by layer, and finally flow to the oil collection tank in liquid form. Compared with traditional products such as ceramics, stainless steel wire mesh and porous foam iron-nickel filter mesh, the later maintenance is more convenient, and the safety and purification efficiency are higher.

[0029] (2) The present invention provides a method for preparing a porous oil fume separation plate, which comprises coating the glaze slurry on the porous foam metal plate twice in succession, and drying the glaze slurry at different times before and after, so that the glaze can be more firmly coated on the porous foam metal plate. After the second drying, the glaze slurry is further solidified by high-temperature sintering to form a ceramic layer, so that the glaze is less likely to fall off and has better wear resistance, thereby protecting the internal porous foam metal plate from rusting. Therefore, compared with traditional products, the porous oil fume separation plate prepared by this method has a longer service life and a higher fire resistance level. DETAILED DESCRIPTION

[0030] The various embodiments shown below provide a detailed description of the present invention, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0031] At present, reports on oil fume filter materials mostly use stainless steel wire mesh, ceramic filter mesh and porous foam iron-nickel filter mesh, etc. These materials have many problems in the field of oil fume separation, such as high cost, inconvenient cleaning and maintenance, acid and alkali resistance, easy to rust, etc. In order to adapt to the national fire protection and environmental protection policies, it is necessary to develop a porous oil fume separation plate with low cost, high interception efficiency, low wind resistance, long life, high fireproof grade and easy maintenance, and its preparation method.

[0032] Example 1

[0033] The invention discloses a porous oil fume separation plate, comprising a porous foam metal plate and a glaze coated on the porous foam metal plate. The porous foam metal plate has a porosity of 15-30 ppi and is made of any one of foam copper, foam iron, foam nickel or foam iron-nickel.

[0034] The glaze includes the following components (all in mass percentage): SiO2: 28%-33%, Al2O3: 4%-5%, Na2O: 12%-15%, K2O: 3%-5%, B2O3: 15%-18%, CaO: 6%-8%, ZnO: 2%-3%, NaBF4: 3%-5%, SrO: 2%-3%, Li2O: 1%-2%, BaO: 2%-3%, CoO+NiO+CuO: 3%-5%, and the above components are all in powder form.

[0035] Among them, the sum of CoO, NiO and CuO accounts for 4%-6%.

[0036] Furthermore, the glaze is 200-500 mesh.

[0037] According to a porous oil fume separation plate, the present invention provides a method for preparing the porous oil fume separation plate, comprising the following steps:

[0038] Step 1: Weigh the glaze components according to the above ratio, add the glaze powder into the water and stir evenly to form a glaze slurry with a specific gravity of 70-100;

[0039] Step 2: Apply glaze slurry for the first time, immerse the porous foam metal completely in the glaze slurry, so that the porous foam metal wire diameter is evenly covered with glaze slurry;

[0040] Step 3: First drying: drying the porous foam metal plate with glaze slurry at a temperature of 90-100°C for 5-15 minutes;

[0041] Step 4: Apply glaze slurry for the second time, immerse the porous foam metal plate dried for the first time in step 3 into the glaze slurry again, so that the porous foam metal wire diameter is evenly covered with glaze slurry;

[0042] Step 5: Second drying: drying the porous foam metal plate coated with glaze slurry in step 4 again, the drying temperature is 95-105°C, and the drying time is 1-1.5h;

[0043] Step 6: Sintering, sintering the porous foam metal plate dried for the second time in step 5, the sintering temperature is 950-1100° C., and the sintering time is 5-10 minutes;

[0044] Step seven: Cooling, cooling the porous foam metal plate sintered in step six to obtain a porous oil fume separation plate.

[0045] The purpose of the first coat in step 3 is to simply coat the glaze without baking it thoroughly. The second coat in step 4 also requires immersion in the glaze.

[0046] Furthermore, in step 2 and step 4, the weight of the glaze slurry applied is 900-1100 g per square meter of the porous metal foam board.

[0047] Furthermore, in step 2, the porous foam metal plate has a ppi of 15-30, and is made of any one of foam copper, foam iron, foam nickel or foam iron-nickel.

[0048] Furthermore, in step one, the glaze includes the following components (all in mass percentage): SiO2: 28%-33%, Al2O3: 4%-5%, Na2O: 12%-15%, K2O: 3%-5%, B2O3: 15%-18%, CaO: 6%-8%, ZnO: 2%-3%, NaBF4: 3%-5%, SrO: 2%-3%, Li2O: 1%-2%, BaO: 2%-3%, CoO+NiO+CuO: 3%-5%, and the above components are all in powder form.

[0049] Furthermore, in step 1, the glaze is 200-500 mesh.

[0050] The porous oil fume separation plate prepared by the above method has a three-dimensional hole structure, which can decompose and intercept the passing grease layer by layer, and finally flow to the oil collection tank in liquid form. Secondly, the glaze layer in the present invention has excellent fire retardant, heat dissipation and acid and alkali resistance. Compared with traditional ceramics, stainless steel wire mesh and porous foam iron-nickel filter products, it has revolutionary progress in safety, maintenance convenience, cost reduction and purification efficiency.

[0051] Example 2

[0052] The present embodiment uses a porous foam iron-nickel plate as a substrate to make a porous oil fume separation plate. The glaze is prepared and stirred evenly until the specific gravity of the glaze slurry is 80. The porous foam iron-nickel plate of 500×500×10mm is immersed in the glaze slurry so that it is evenly hung with the glaze slurry. The porous foam iron-nickel plate with the glaze slurry is dried, the temperature is adjusted to 90 degrees, and the glaze slurry is dried for 7 minutes. The dried plate is glazed again, and the specific gravity of the glaze slurry is 80. The plate with the glaze slurry is dried again, the drying temperature is 95 degrees, and the drying time is 1.2h. The dried porous foam plate is sintered, the sintering temperature is 950℃, and the sintering time is 6 minutes. The sintered plate is taken out and placed for cooling to obtain a porous oil fume separation plate. After testing, the oil fume separation efficiency meets the requirements. The porous oil fume separation plate prepared by the method has low cost, high interception efficiency, low wind resistance, long life, high fire rating, and easy maintenance. It is used to solve many problems in the field of oil fume separation such as high cost, inconvenient cleaning and maintenance, acid and alkali resistance, and easy rusting of traditional materials such as stainless steel wire mesh, ceramic filter mesh and porous foam iron-nickel filter mesh.

[0053] Example 3

[0054] In this embodiment, a porous foam iron plate is used as a substrate to make a porous oil fume separation plate.

[0055] The glaze was prepared and stirred evenly until the glaze slurry density was 75. A 250×250×10mm porous foam iron plate was immersed in the glaze slurry to evenly coat it with the glaze slurry. The porous foam iron plate with the glaze slurry was dried, the temperature was adjusted to 95 degrees, and it was dried for 6 minutes. The dried plate was glazed again, and the glaze slurry density was 75. The plate with the glaze slurry was dried again, the drying temperature was 90 degrees, and the drying time was 1.5 hours. The dried porous foam plate was sintered at a sintering temperature of 980℃ for 8 minutes. The sintered plate was taken out and placed for cooling to obtain a porous oil fume separation plate. After testing, the oil fume separation efficiency meets the requirements.

[0056] Example 4

[0057] In this embodiment, a porous nickel foam plate is used as a substrate to manufacture a porous oil fume separation plate.

[0058] The glaze was prepared and stirred evenly until the specific gravity of the glaze slurry was 80. The porous nickel foam plate of 200×200×10mm was immersed in the glaze slurry to evenly coat it with the glaze slurry. The porous nickel foam plate with the glaze slurry was dried, the temperature was adjusted to 90 degrees, and it was dried for 8 minutes. The dried plate was glazed again, and the specific gravity of the glaze slurry was 75. The plate with the glaze slurry was dried again, the drying temperature was 90 degrees, and the drying time was 1.5 hours. The dried porous foam plate was sintered at a sintering temperature of 960℃ for 8 minutes. The sintered plate was taken out and placed for cooling to obtain a porous oil fume separation plate. After testing, the oil fume separation efficiency meets the requirements.

[0059] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for preparing a porous oil fume separation plate, characterized in that: The following steps are involved: Step 1: Weigh various glaze components in proportion, mix them evenly, then add the glaze into water and stir evenly to form glaze slurry; The glaze is 200-500 mesh; Step 2: Apply glaze slurry for the first time, immerse the porous foam metal plate completely in the glaze slurry, so that the porous foam metal wire diameter is evenly covered with the glaze slurry; Step 3: First drying: drying the porous foam metal plate with glaze slurry at a temperature of 90-100°C for 5-15 minutes; Step 4: Apply glaze slurry for the second time, immerse the porous foam metal plate dried for the first time in step 3 into the glaze slurry again, so that the porous foam metal wire diameter is evenly covered with glaze slurry; Step 5: Second drying: drying the porous foam metal plate coated with glaze slurry in step 4 again, the drying temperature is 95-105°C, and the drying time is 1-1.5h; Step 6: Sintering, sintering the porous foam metal plate dried for the second time in step 5, the sintering temperature is 950-1100° C., and the sintering time is 5-10 minutes; Step 7: Cooling, cooling the porous foam metal plate sintered in step 6 to room temperature to obtain a porous oil fume separation plate; In step 2 and step 4, the weight of the glaze slurry applied is 900-1100 g per square meter of the porous metal foam board; In step 2, the porous foam metal plate has a ppi of 15-30 and is made of any one of foam copper, foam iron, foam nickel or foam iron nickel; In step one, the glaze includes the following components, all in mass percentage: SiO2: 28%-33%, Al2O3: 4%-5%, Na2O: 12%-15%, K2O: 3%-5%, B2O3: 15%-18%, CaO: 6%-8%, ZnO: 2%-3%, NaBF4: 3%-5%, SrO: 2%-3%, Li2O: 1%-2%, BaO: 2%-3%, CoO+NiO+CuO: 3%-5%, and the above components are all in powder form.

2. A porous oil fume separation plate prepared by the method according to claim 1, characterized in that: The invention comprises a porous foam metal plate and a glaze coated on the porous foam metal plate.