CN117654409A - Nanometer fumed silica surface modification production device and production method thereof - Google Patents
Nanometer fumed silica surface modification production device and production method thereof Download PDFInfo
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- CN117654409A CN117654409A CN202311459522.3A CN202311459522A CN117654409A CN 117654409 A CN117654409 A CN 117654409A CN 202311459522 A CN202311459522 A CN 202311459522A CN 117654409 A CN117654409 A CN 117654409A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 229910021485 fumed silica Inorganic materials 0.000 title claims abstract description 76
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
- 230000004048 modification Effects 0.000 title claims abstract description 37
- 238000012986 modification Methods 0.000 title claims abstract description 37
- 239000002994 raw material Substances 0.000 claims abstract description 82
- 239000003607 modifier Substances 0.000 claims abstract description 59
- 238000001035 drying Methods 0.000 claims abstract description 53
- 238000003860 storage Methods 0.000 claims abstract description 35
- 238000000926 separation method Methods 0.000 claims abstract description 26
- 239000007787 solid Substances 0.000 claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 35
- 238000002156 mixing Methods 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 14
- 238000001179 sorption measurement Methods 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 4
- 238000010924 continuous production Methods 0.000 abstract description 6
- 239000000047 product Substances 0.000 description 63
- 239000007789 gas Substances 0.000 description 53
- 230000006872 improvement Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 239000012071 phase Substances 0.000 description 7
- 239000000428 dust Substances 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000013529 heat transfer fluid Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000013040 rubber vulcanization Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Organic Chemistry (AREA)
- Silicon Compounds (AREA)
Abstract
The invention discloses a nanometer fumed silica surface modification production device and a production method thereof, wherein the device comprises the following steps: the device comprises a raw material storage tank, a modifier metering tank, a mixer, a deacidification fluidized bed, a drying fluidized bed, a finished product tank and a tail gas treatment unit. The raw material storage tank and the modifier metering tank are both communicated with a mixer, and the mixer is communicated with a deacidification fluidized bed. The deacidification fluidized bed is provided with a deacidification gas-solid separation chamber which is communicated with the drying fluidized bed and the tail gas treatment unit. The drying fluidized bed is provided with a drying gas-solid separation chamber communicated with the finished product tank. The lower end of the finished product tank is provided with a finished product outlet, and the upper end of the finished product tank is communicated with the tail gas treatment unit. The nano fumed silica surface modification production device can realize continuous production of nano fumed silica surface modification products, and improves production efficiency. The production method can realize continuous production based on the production device, and improves the production efficiency.
Description
Technical Field
The invention relates to the technical field of nano powder production equipment, in particular to a nano fumed silica surface modification production device and a production method thereof.
Background
Because of the polysilicone inside the fumed silica and the active silicon hydroxyl groups on the outer surface, the fumed silica especially absorbs water to make the fumed silica hydrophilic, and is difficult to wet and disperse in an organic phase. Moreover, the surface energy is relatively high due to the presence of hydroxyl groups on the surface, and aggregates tend to aggregate, so that the application properties of the product are affected. Such as poor compatibility and dispersion with the polymer in the rubber vulcanization system, easy coagulation and precipitation in the coating product, and simultaneous addition of the silane coupling agent in the tire for mass use, etc.
The modified fumed silica is a novel fine inorganic material with a special structure, almost has all the excellent performances of common fumed silica, and has improved added value and greatly expanded application field due to the hydrophobicity and special surface structure.
In the prior art, related enterprises adopt reaction kettles to produce nano fumed silica modified products, raw materials are required to be heated and stirred and mixed in the production process, continuous production cannot be realized, the production scale is small, the problems of low productivity and high energy consumption are commonly existed, and the quality fluctuation of the products is large and unstable, and the effects in the application processes of thickening, reinforcing and the like are good and bad.
Disclosure of Invention
The invention aims to provide a nano fumed silica surface modification production device which solves one or more technical problems in the prior art, and at least provides a beneficial selection or creation condition.
The technical scheme adopted for solving the technical problems is as follows:
a nano fumed silica surface modification production device, comprising: the device comprises a raw material storage tank, a modifier metering tank, a mixer, a deacidification fluidized bed, a drying fluidized bed, a finished product tank and a tail gas treatment unit;
the raw material storage tank and the modifier metering tank are both communicated with the mixer, the mixer is communicated with the deacidification fluidized bed, the deacidification fluidized bed is provided with a deacidification gas-solid separation chamber communicated with the drying fluidized bed and the tail gas treatment unit, the drying fluidized bed is provided with a drying gas-solid separation chamber communicated with the finished product tank, the lower end of the finished product tank is provided with a finished product outlet, and the upper end of the finished product tank is communicated with the tail gas treatment unit.
The nano fumed silica surface modification production device provided by the invention has at least the following beneficial effects: the raw material storage tank and the modifier metering tank can continuously supply the nano fumed silica raw material and the modification treatment agent for modification production. The nanometer gas phase silicon dioxide raw material and the modifying treatment agent are introduced into the mixer for mixing treatment, so that the nanometer gas phase silicon dioxide raw material and the modifying treatment agent are fully mixed, and then introduced into the deacidification fluidized bed for deacidification treatment. And (3) introducing the deacidified product into the drying fluidized bed from a deacidified gas-solid separation chamber for drying treatment, conveying the dried product powder into the finished product tank, and conveying the cooled product out of the finished product outlet. The deacidification tail gas and the finished product tail gas of the deacidification gas-solid separation chamber and the finished product tank can be treated by the tail gas treatment unit, so that pollution is avoided. The nano fumed silica surface modification production device can realize continuous production of nano fumed silica surface modification products, and greatly improves production efficiency.
As a further improvement of the technical scheme, the deacidification fluidized bed is provided with a deacidification feed inlet and a modifier inlet, wherein the deacidification feed inlet is communicated with the mixer, and the modifier inlet is communicated with the modifier metering tank. Through the technical scheme, the modifier inlet can be filled with the heated and vaporized modification treatment agent, so that the nano fumed silica raw material in the deacidification fluidized bed can be ensured to be completely reacted.
As a further improvement of the technical scheme, pretreatment heaters are arranged between the raw material storage tank and the modifier metering tank as well as between the raw material storage tank and the mixer. According to the technical scheme, the nano fumed silica raw material and the modifying treatment agent are subjected to preheating treatment by the two pretreatment heaters, so that the nano fumed silica raw material can reach the reaction temperature, and the modifying treatment agent can be vaporized, so that the full reaction is realized.
As a further improvement of the technical scheme, a preheating pipe is arranged between the raw material storage tank and the modifier metering tank and the pretreatment heater, a heat exchanger is arranged between the finished product tank and the preheating pipe, and the heat exchanger is respectively in heat conduction connection with the preheating pipe and the finished product tank. Through the technical scheme, the heat exchanger can realize heat exchange between the finished product tank and the preheating pipe. The heat of the finished powder is recovered to the preheating pipe through the heat exchanger, so that the nano fumed silica raw material and the modifying treatment agent can raise a certain temperature before entering the pretreatment heater, and the energy consumption is reduced.
As a further improvement of the technical scheme, the raw material storage tank is provided with a metering sensor, and a discharge hole of the modifier metering tank is provided with a modifier metering pump. Through the technical scheme, the metering sensor and the modifier metering pump are mutually matched for use, so that the dosage of the modifier can be adjusted according to the dosage of the nano fumed silica raw material, the efficient and stable production is maintained, and the waste is avoided.
As a further improvement of the technical scheme, the upper ends of the deacidification fluidized bed and the drying fluidized bed are provided with balance pipes communicated with the deacidification fluidized bed and the drying fluidized bed, and valves are arranged in the balance pipes. Through the technical scheme, the deacidification fluidized bed and the drying fluidized bed can keep gas phase balance through valve adjustment, so that the material level of the nano gas phase silicon dioxide powder can be kept at the same horizontal plane, and the feeding and discharging balance of the deacidification fluidized bed and the drying fluidized bed is achieved, and continuous production is realized.
As a further improvement of the technical scheme, the lower ends of the deacidification fluidized bed and the drying fluidized bed are respectively provided with a settling chamber, and the settling chambers are provided with slag discharge ports. Through the technical scheme, large particle powder generated in the deacidification fluidized bed and the drying fluidized bed can be settled at the bottom of the settling chamber, slag can be regularly discharged through the slag discharging port, large particles in a finished product are removed, uniform and stable particle size of the finished product is ensured, and the application effect of the finished product is greatly improved.
As a further improvement of the above technical solution, the tail gas treatment unit includes a filter, a purifying tower, an adsorption tank and a tail gas blower which are sequentially communicated, and the filter has a tail gas inlet which is communicated with the deacidification fluidized bed and the finished product tank. Through above-mentioned technical scheme, tail gas fan can blow the air and outwards discharge to pass through filter, purifying column and adsorption tank in proper order filter, purify and adsorption treatment respectively to production tail gas.
As a further improvement of the above technical solution, the tail gas inlet of the filter is also communicated with the raw material storage tank, and the filter is also provided with a filter material outlet communicated between the mixer and the deacidification fluidized bed. Through the technical scheme, the dust filter material obtained by filtering is sent back to the deacidification fluidized bed through the filter material outlet, so that closed loop circulation of production raw materials is realized, harmless emission is realized, and the method is energy-saving and environment-friendly.
The invention also provides a production method using the nano fumed silica surface modification production device, which comprises the following steps: the method comprises the steps that a raw material storage tank and a modifier metering tank are used for respectively supplying a nano fumed silica raw material and a modifier, and the nano fumed silica raw material and the modifier are heated to 200-300 ℃ through a pretreatment heater and are heated and vaporized through the pretreatment heater in the process that the nano fumed silica raw material and the modifier are led to a mixer from the raw material storage tank and the modifier metering tank; sequentially introducing the preheated nano fumed silica raw material and the modification treatment agent into a mixer, a deacidification fluidized bed and a drying fluidized bed, sequentially carrying out mixing, deacidification and drying treatment, and discharging the qualified finished product powder after being stored and cooled by a finished product tank; the tail gas in the modification production process is treated by a tail gas treatment unit.
According to the production method of the nano fumed silica surface modified product, provided by the invention, the continuous processing production of the modified nano fumed silica powder can be realized through the nano fumed silica surface modification production device, and the production efficiency is greatly improved.
Drawings
The invention is further described below with reference to the drawings and examples;
FIG. 1 is a schematic diagram of an embodiment of a device for producing nano fumed silica by surface modification according to the present invention;
fig. 2 is a schematic structural diagram of a production device for modifying the surface of nano fumed silica according to an embodiment of the present invention.
In the figure: 100. a raw material storage tank; 110. a metering sensor; 200. a modifier metering tank; 210. a modifier metering pump; 300. a pretreatment heater; 400. a mixer; 500. deacidifying the fluidized bed; 600. drying the fluidized bed; 610. a balance tube; 700. a finished product tank; 800. a tail gas treatment unit; 810. a filter; 820. a purifying tower; 830. an adsorption box; 840. a tail gas fan; 900. and (5) a finished product packaging machine.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, if there is a word description such as "a plurality" or the like, the meaning of a plurality is one or more, and the meaning of a plurality is two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 to 2, the nano fumed silica surface modification production apparatus of the present invention makes the following examples:
a nano fumed silica surface modification production device, comprising: a raw material storage tank 100, a modifier metering tank 200, a mixer 400, a deacidification fluidized bed 500, a drying fluidized bed 600, a finished product tank 700, a tail gas treatment unit 800 and a finished product packaging machine 900.
In this embodiment, the raw material tank 100, the modifier metering tank 200, and the finished tank 700 each have a sealed tank body in the shape of a cylinder. The bottoms of the raw material storage tank 100, the modifier metering tank 200 and the finished product tank 700 are in conical cylinder shapes with wide upper parts and narrow lower parts.
The lower end of the raw material storage tank 100 has a raw material outlet communicating with the mixer 400, and the lower end of the modifier metering tank 200 has a modifier outlet communicating with the mixer 400.
The mixer 400 has a mixing inlet and a mixing outlet. The mixing inlet is communicated with the raw material storage tank 100 and the modifier metering tank 200, and the mixing outlet is communicated with the deacidification fluidized bed 500.
The deacidification fluidized bed 500 and the drying fluidized bed 600 are in the shape of a diameter-variable cylinder. The deacidification fluidized bed 500 and the drying fluidized bed 600 are provided with a settling chamber, a heating mixing chamber and a gas-solid separation chamber. The axial directions of the deacidification fluidized bed 500 and the drying fluidized bed 600 are extended in the up-down direction. The sedimentation chamber, the heating mixing chamber and the gas-solid separation chamber are sequentially arranged from bottom to top and are mutually communicated.
The gas-solid separation chambers of the deacidification fluidized bed 500 and the drying fluidized bed 600 are respectively a deacidification gas-solid separation chamber and a drying gas-solid separation chamber.
The deacidification gas-solid separation chamber is provided with a deacidification powder outlet and a deacidification tail gas outlet. The deacidification tail gas outlet is communicated with the tail gas treatment unit 800, and the deacidification powder outlet is communicated with the drying fluidized bed 600. The dry gas-solid separation chamber has a dry powder outlet in communication with the finished canister 700.
The dry powder outlet is communicated with the upper end of the finished product tank 700, and the lower end of the finished product tank 700 is provided with a finished product outlet. The upper end of the product tank 700 is further provided with a product tail gas outlet communicated with the tail gas treatment unit 800. The product packaging machine 900 is used for packaging product powder, and the product packaging machine 900 is disposed below the product outlet.
In actual use, the raw material storage tank 100 and the modifier metering tank 200 are respectively filled with the nano fumed silica raw material and the modifier, and the raw material storage tank 100 and the modifier metering tank 200 can continuously supply the nano fumed silica raw material and the modifier for modification production. The nano fumed silica raw material and the modifying agent are respectively introduced into the mixer 400 from a raw material outlet and a modifying agent outlet for mixing treatment. The mixer 400 enables thorough mixing of the nano fumed silica feedstock and the modifying treatment agent. The well mixed nano fumed silica material and the modifying treatment agent are then introduced into the deacidification fluidized bed 500 for deacidification treatment. The deacidified product is introduced into the drying fluidized bed 600 from the deacidified gas-solid separation chamber for drying treatment. And the dried product powder is sent into the finished product tank 700 from the dry gas-solid separation chamber, and is sent out from the finished product outlet after being cooled. The deacidified tail gas and the finished tail gas of the deacidified gas-solid separation chamber and the finished product tank 700 can be treated by the tail gas treatment unit 800, so that pollution is avoided.
In this embodiment, the mixer 400 is a static mixer 400. The static mixer 400 is a high-efficiency mixing apparatus without moving parts, and its basic working mechanism is to change the flow state of fluids in a tube by using a mixing unit body fixed in the tube, so as to achieve the purpose of good dispersion and thorough mixing between different fluids. In other embodiments, the mixer 400 may also employ orifice columns, venturi tubes, agitators, homogenizers, and other mixing treatment elements.
In this embodiment, the lower ends of the deacidification fluidized bed 500 and the drying fluidized bed 600 are respectively provided with a settling chamber, and the settling chamber is provided with a slag discharge port. In the production process, large particle powder generated in the deacidification fluidized bed 500 and the drying fluidized bed 600 can be settled at the bottom of the settling chamber, and slag can be regularly discharged through the slag discharging port, so that large particles in a finished product are removed, uniform particle size and stable quality of the finished product are ensured, and the application effect of the finished product is greatly improved.
To ensure that the nano fumed silica raw material can be sufficiently handled during the production process, the raw material tank 100 in this embodiment has a metering sensor 110, and the discharge port of the modifier metering tank 200 is provided with a modifier metering pump 210. The metering sensor 110 can monitor the increase or decrease of the nano fumed silica material in the material storage tank 100. The modifier metering pump 210 is provided between the modifier metering tank 200 and the mixer 400, and can control the supply amount of the modifying treatment agent. Through the mutual cooperation of the metering sensor 110 and the modifier metering pump 210, the dosage of the modifier can be adjusted according to the dosage of the nano fumed silica raw material, so that the efficient and stable production is maintained, and the waste is avoided.
To avoid that part of the nano fumed silica raw material does not react completely in the deacidification fluidized bed 500, in this embodiment, the deacidification fluidized bed 500 has a deacidification feed port and a modifier inlet, wherein the deacidification feed port is communicated with the mixer 400, and the modifier inlet is communicated with the modifier metering tank 200. Referring to fig. 1, the deacidification feed port and the modifier inlet are respectively communicated with the front and rear ends of the mixer 400. The mixed nano fumed silica raw material and the modifying agent can enter the deacidification fluidized bed 500 from the deacidification feed inlet for deacidification treatment. The modifier inlet can be filled with a heated and vaporized modification treatment agent, so that the nano fumed silica raw material in the deacidification fluidized bed 500 can be ensured to be completely reacted.
In this embodiment, the deacidification fluidized bed 500 and the drying fluidized bed 600 are arranged in parallel, the upper ends of the deacidification gas-solid separation chamber and the drying gas-solid separation chamber are provided with a balance pipe 610, and two ends of the balance pipe 610 are respectively communicated with the deacidification gas-solid separation chamber and the drying gas-solid separation chamber. The balance pipe 610 is communicated with the deacidification gas-solid separation chamber and the drying gas-solid separation chamber, so that the deacidification fluidized bed 500 and the drying fluidized bed 600 can keep gas phase balance, and the material level of the nano gas phase silicon dioxide powder in the deacidification fluidized bed 500 and the drying fluidized bed 600 can be kept at the same horizontal plane, thereby achieving the feeding and discharging balance of the deacidification fluidized bed 500 and the drying fluidized bed 600 and realizing continuous production.
In order to allow the nano fumed silica raw material and the modifying treatment agent to sufficiently react, in the present embodiment, a pretreatment heater 300 is provided between the raw material tank 100 and the mixer 400, and between the modifying agent metering tank 200 and the mixer 400. The nano fumed silica raw material and the modifying agent are respectively preheated by the two pretreatment heaters 300 before being introduced into the mixer 400 for mixing treatment, so that the nano fumed silica raw material can reach the reaction temperature, and the modifying agent can be vaporized, thereby realizing the full mixing of the nano fumed silica raw material and the modifying agent, and being beneficial to complete reaction.
The nano fumed silica raw material and the modifying agent need to be heated, and the finished powder for finishing modification production needs to be cooled. In a further embodiment, to increase energy utilization and reduce energy consumption, a heat exchanger is provided between the finished tank 700 and the raw material storage tank 100 and modifier metering tank 200. The heat exchanger is used for carrying out heat exchange on the finished powder in the finished tank 700, the nano fumed silica raw material before the preheating treatment and the modifying treatment agent.
In this embodiment, preheating pipes are provided between the raw material tank 100 and the pretreatment heater 300, and between the modifier metering tank 200 and the pretreatment heater 300. The heat exchanger comprises a hot air pipe, a cold air pipe and a heat exchange fan. The hot air pipe is communicated with the cold air pipe, the hot air pipe is connected with the preheating pipe, the cold air pipe is connected with the finished product tank 700, and the heat exchange fan is used for driving heat conduction gas in the hot air pipe and the cold air pipe to circularly flow.
After the heat conducting gas is heated and raised in the finished product tank 700, the heat conducting gas is conveyed to a preheating pipe through the hot air pipe to heat the nano fumed silica raw material or the modified treating agent in the preheating pipe, and the heated low-temperature heat conducting gas is conveyed to the finished product tank 700 through the cold air pipe to absorb heat, so that the circulation is repeated, and the heat exchange between the finished product tank 700 and the preheating pipe is realized. The heat of the finished powder is recovered to the preheating pipe through the heat exchanger, so that the nano fumed silica raw material and the modifying treatment agent can raise a certain temperature before entering the pretreatment heater 300, and the energy consumption is reduced.
In other embodiments, the heat exchanger may employ a liquid thermally conductive fluid. The heat exchanger comprises a hot water pipe, a cold water pipe and a heat exchange pump. Heat recovery is achieved by a circulating flow of a heat transfer fluid.
In a further embodiment, to avoid cooling the nano silica rice raw material subjected to the heat treatment by the pretreatment heater 300, the mixer 400, the deacidification fluidized bed 500, the drying fluidized bed 600 and the finished product tank 700 are all communicated by heat tracing pipes. The heat tracing pipe can be electric tracing or jacket tracing. The aim of heat tracing is to prevent heat loss, thereby affecting the activity of the nano silicon dioxide rice raw material, leading the nano gas phase silicon dioxide raw material and the modifying treatment agent to have insufficient mixing reaction in the follow-up process and affecting the product quality.
In this embodiment, the exhaust gas treatment unit 800 includes: filter 810, purification tower 820, adsorption tank 830, and exhaust fan 840. The filter 810, the purifying tower 820, the adsorption tank 830 and the exhaust fan 840 are sequentially communicated with each other. The exhaust fan 840 can blow air to be discharged outwards, and sequentially pass through the filter 810, the purifying tower 820 and the adsorption box 830 to filter, purify and adsorb the production exhaust. The purification tower 820 can spray and neutralize the waste gas, the adsorption box 830 is provided with an activated carbon filter element, can adsorb and remove the odor of the waste gas, and finally is discharged to the atmosphere through the tail gas fan 840.
The deacidification tail gas outlet and the finished product tail gas outlet are both in communication with a tail gas inlet of the filter 810. The tail gas from the drying fluidized bed 600 is delivered to the upper end of the deacidification fluidized bed 500 through the balance pipe 610, and the tail gas from the deacidification fluidized bed 500 and the drying fluidized bed 600 is delivered to the filter 810 through the deacidification tail gas outlet for filtration.
In a further embodiment, the filter 810 has a filter media outlet that communicates between the mixer 400 and the deacidification fluidized bed 500, and the off-gas inlet of the filter 810 is also in communication with the feedstock storage tank 100. To ensure that the heated and mixed nano fumed silica materials can react sufficiently, the deacidification fluidized bed 500 and the drying fluidized bed 600 are provided with a surplus of gaseous modifying treatment agent. The nano fumed silica raw material in the raw material storage tank 100 can be introduced into the tail gas inlet and mixed with the tail gas containing the modifying treatment agent, and the filtered dust filter material is returned to the deacidification fluidized bed 500 through the filter material outlet, so that closed loop circulation of the raw material is realized, harmless emission is realized, energy conservation and environmental protection are realized.
In this embodiment, the filter 810 may use a bag filter to filter the powder in the exhaust gas. In other embodiments, the filter 810 may be a pulse back-flushing external filter dust collector. In other embodiments, the filter 810 may also employ other filters such as dry mechanical dust filters, wet filters, particle layer filters, electro dust filters, and the like.
The invention also provides a production method of the nano fumed silica surface modified powder based on the nano fumed silica surface modified production device, and the production method is characterized in that:
the nano fumed silica raw material and the modifying treatment agent are respectively introduced into the raw material storage tank 100 and the modifying agent metering tank 200, and nitrogen is introduced for protection.
The nano fumed silica raw material and the modifying treatment agent are discharged from the bottoms of the raw material storage tank 100 and the modifying agent metering tank 200, respectively, the nano fumed silica raw material is heated to 200 to 300 ℃ by the pretreatment heater 300, and the modifying treatment agent is heated and vaporized by the pretreatment heater 300.
The nano fumed silica raw material after the preheating treatment and the modifying treatment agent are introduced into the mixer 400 for mixing treatment. And introducing the mixed product into the deacidification fluidized bed 500, and introducing mixed gas of steam and nitrogen into a heating mixing chamber of the deacidification fluidized bed 500 to carry out deacidification treatment. In order to prevent the occurrence of partial nano fumed silica not participating in the reaction, the heated and vaporized modifying treatment agent is introduced again into the heating and mixing chamber of the deacidification fluidized bed 500.
And discharging the deacidified product from the deacidification gas-solid separation chamber to the drying fluidized bed 600 for drying treatment to remove water. And conveying the dried qualified products from the drying gas-solid separation chamber into the finished product tank 700 for cooling. And packaging the finished product powder when the temperature of the finished product is less than 60 ℃ to obtain a final finished product.
The tail gas generated in the production process is pumped to the filter 810 through the tail gas fan 840 for dedusting and filtering, the filtered dust is returned to the deacidification fluidized bed 500, the tail gas enters the purification tower 820 for neutralization and spraying, enters the adsorption box 830 for deodorizing through activated carbon adsorption, and is finally directly discharged to the atmosphere through the tail gas fan 840.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, various changes, modifications, substitutions and alterations can be made herein by one having ordinary skill in the art without departing from the spirit and scope of the present invention as defined by the following claims and the equivalents thereof.
Claims (10)
1. The nanometer fumed silica surface modification apparatus for producing, characterized in that: comprising the following steps: the device comprises a raw material storage tank, a modifier metering tank, a mixer, a deacidification fluidized bed, a drying fluidized bed, a finished product tank and a tail gas treatment unit;
the raw material storage tank and the modifier metering tank are both communicated with the mixer, the mixer is communicated with the deacidification fluidized bed, the deacidification fluidized bed is provided with a deacidification gas-solid separation chamber communicated with the drying fluidized bed and the tail gas treatment unit, the drying fluidized bed is provided with a drying gas-solid separation chamber communicated with the finished product tank, the lower end of the finished product tank is provided with a finished product outlet, and the upper end of the finished product tank is communicated with the tail gas treatment unit.
2. The nano fumed silica surface modification apparatus for producing according to claim 1, wherein: the deacidification fluidized bed is provided with a deacidification feed inlet and a modifier inlet, the deacidification feed inlet is communicated with the mixer, and the modifier inlet is communicated with the modifier metering tank.
3. The nano fumed silica surface modification apparatus for producing according to claim 2, wherein: pretreatment heaters are arranged between the raw material storage tank and the modifier metering tank and between the raw material storage tank and the mixer.
4. The nano fumed silica surface modification apparatus for producing according to claim 3, wherein: a preheating pipe is arranged between the raw material storage tank and the modifier metering tank and between the raw material storage tank and the pretreatment heater, a heat exchanger is arranged between the finished product tank and the preheating pipe, and the heat exchanger is respectively connected with the preheating pipe and the finished product tank.
5. The nano fumed silica surface modification apparatus for producing according to claim 1, wherein: the raw material storage tank is provided with a metering sensor, and a discharge port of the modifier metering tank is provided with a modifier metering pump.
6. The nano fumed silica surface modification apparatus for producing according to claim 1, wherein: the upper ends of the deacidification fluidized bed and the drying fluidized bed are provided with balance pipes communicated with the deacidification fluidized bed and the drying fluidized bed, and valves are arranged in the balance pipes.
7. The nano fumed silica surface modification apparatus for producing according to claim 1, wherein: the lower ends of the deacidification fluidized bed and the drying fluidized bed are respectively provided with a settling chamber, and the settling chambers are provided with slag discharge ports.
8. The nano fumed silica surface modification apparatus for producing according to claim 1, wherein: the tail gas treatment unit comprises a filter, a purifying tower, an adsorption box and a tail gas fan which are sequentially communicated, wherein the filter is provided with a tail gas inlet which is communicated with the deacidification fluidized bed and the finished product tank.
9. The nano fumed silica surface modification apparatus for producing according to claim 8, wherein: the tail gas inlet of the filter is also communicated with the raw material storage tank, and the filter is also provided with a filter material outlet communicated between the mixer and the deacidification fluidized bed.
10. A production method using the nano fumed silica surface modification production device as defined in claim 4, which is characterized by comprising the following steps: the method comprises the steps that a raw material storage tank and a modifier metering tank are used for respectively supplying a nano fumed silica raw material and a modifier, and the nano fumed silica raw material and the modifier are heated to 200-300 ℃ through a pretreatment heater and are heated and vaporized through the pretreatment heater in the process that the nano fumed silica raw material and the modifier are led to a mixer from the raw material storage tank and the modifier metering tank; sequentially introducing the preheated nano fumed silica raw material and the modification treatment agent into a mixer, a deacidification fluidized bed and a drying fluidized bed, sequentially carrying out mixing, deacidification and drying treatment, and discharging the qualified finished product powder after being stored and cooled by a finished product tank; the tail gas in the modification production process is treated by a tail gas treatment unit.
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