WO2017101645A1 - 氮气泡沫混凝土自保温砌块生产工艺及其造泡装置 - Google Patents

氮气泡沫混凝土自保温砌块生产工艺及其造泡装置 Download PDF

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Publication number
WO2017101645A1
WO2017101645A1 PCT/CN2016/106845 CN2016106845W WO2017101645A1 WO 2017101645 A1 WO2017101645 A1 WO 2017101645A1 CN 2016106845 W CN2016106845 W CN 2016106845W WO 2017101645 A1 WO2017101645 A1 WO 2017101645A1
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Prior art keywords
foaming
nitrogen
foam
production process
insulating block
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PCT/CN2016/106845
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English (en)
French (fr)
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张艮中
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河北三山建材科技有限公司
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Priority to US15/745,248 priority Critical patent/US20180222084A1/en
Priority to EP16874702.0A priority patent/EP3392009A4/en
Publication of WO2017101645A1 publication Critical patent/WO2017101645A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/50—Producing shaped prefabricated articles from the material specially adapted for producing articles of expanded material, e.g. cellular concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/234—Surface aerating
    • B01F23/2341—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/235—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids for making foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/421—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path
    • B01F25/423—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/70—Mixers specially adapted for working at sub- or super-atmospheric pressure, e.g. combined with de-foaming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/04—Discharging the shaped articles
    • B28B13/06—Removing the shaped articles from moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/38—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions wherein the mixing is effected both by the action of a fluid and by directly-acting driven mechanical means, e.g. stirring means ; Producing cellular concrete
    • B28C5/381—Producing cellular concrete
    • B28C5/386—Plants; Systems; Methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/38—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions wherein the mixing is effected both by the action of a fluid and by directly-acting driven mechanical means, e.g. stirring means ; Producing cellular concrete
    • B28C5/381—Producing cellular concrete
    • B28C5/386—Plants; Systems; Methods
    • B28C5/388—Methods
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
    • C04B38/103—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam the foaming being obtained by the introduction of a gas other than untreated air, e.g. nitrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/28—Mixing cement, mortar, clay, plaster or concrete ingredients
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00137—Injection moldable mixtures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors

Definitions

  • the present invention relates to the field of building material production technology, and in particular, to a nitrogen foam concrete self-insulating block production process and a foaming device thereof. Background technique
  • Foamed concrete self-insulating block is one of the commonly used self-insulating wall materials, belonging to inorganic lightweight insulation materials, with good thermal performance, physical and mechanical properties and non-combustible properties, and good construction and filling performance.
  • the online filling of the block production line is realized, and the production equipment of the block has reached the level of automation and high efficiency.
  • most of the foam concretes currently use chemical foaming methods, which are chemical reactions of substances to produce new gas for foaming.
  • the main feature of chemical foaming is that the foam has no foam walls and has poor stability. It must be treated with hydration products of cement and other materials.
  • the substrate can be stably present, and the foam bubble diameter varies with the pressure and the amount of foaming material, and is difficult to control.
  • the technical problem to be solved by the present invention is to provide a nitrogen foam concrete self-insulating block production process and a foaming device thereof with simple process and low production cost, reduce thermal conductivity, and improve foamed concrete self-insulating block.
  • the thermal insulation performance extends the service life of the foam concrete self-insulating block.
  • a nitrogen foam concrete self-insulating block production process comprising the following steps:
  • prefabricating a foaming liquid filled with nitrogen mixing the animal protein foaming agent and water to form a foaming liquid, and filling nitrogen into the foaming liquid to form a foaming liquid filled with nitrogen;
  • Precast concrete slurry adding material and water to the stirring device and mixing and mixing into concrete slurry;
  • Preparing foamed concrete slurry adding foaming liquid filled with nitrogen into concrete slurry and stirring well
  • the foaming device comprises a foaming agent storage tank, a vacuum foaming tank, a compressed nitrogen tube, a plunger pump and a hose pump, and an animal protein foaming agent and water in the foaming agent storage tank.
  • a foaming liquid is formed, and the foaming liquid is introduced into the vacuum foaming tank through a plunger pump, and the foaming liquid collides with the spiral ribbon in the vacuum foaming tank to uniformly foam, and the nitrogen gas from the nitrogen tank is subjected to air pressure.
  • high-pressure nitrogen gas is formed, and the high-pressure nitrogen gas is then charged into the vacuum foaming tank to be filled into the foam of the foaming liquid.
  • the ratio of the animal protein foaming agent to water in the foaming liquid is 1:25.
  • the foamed concrete slurry has a density and a dry density ratio of 70:100.
  • the nitrogen foam foaming device used in the above nitrogen foam concrete self-insulating block production process comprises a foaming agent storage tank, a vacuum foaming tank, a compressed nitrogen tube, a first conveying pump and a second conveying pump,
  • the foam storage tank contains an aqueous solution of an animal protein foaming agent
  • the foaming agent storage tank is connected to the vacuum foaming tank through a first transfer pump and a pipeline
  • the compressed nitrogen gas pipeline is connected to the vacuum foaming tank
  • the vacuum foaming tank conveys the material to the stirring device through the second conveying pump and the conveying pipe, and the spiral foaming tank uniformly distributes the spiral ribbon
  • the spiral ribbon is a spiral wire.
  • the first transfer pump is a plunger pump
  • the second transfer pump is a hose pump
  • the beneficial effects produced by the above technical solution are: using a foaming device to fill nitrogen into the foaming liquid to form a foaming liquid filled with nitrogen, and then entering the stirring device and thoroughly mixing with the concrete slurry to form a foamed concrete slurry. Then, it is poured into a mold for casting, and after a period of heat preservation, the mold is released to obtain a foamed concrete block filled with nitrogen.
  • the invention has the advantages of simple process and low production cost, and the produced foamed concrete block has the characteristics of low thermal conductivity, high thermal insulation performance and long service life, and is suitable for popularization and application. Brief description of the drawing
  • FIG. 1 is a schematic structural view of a production line used in an embodiment of the present invention.
  • FIG. 2 is a schematic view of the foaming device of FIG. 1;
  • a nitrogen foam concrete self-insulating block production process includes the following steps:
  • prefabricating a foaming liquid filled with nitrogen mixing the animal protein foaming agent and water to form a foaming liquid, and filling nitrogen into the foaming liquid to form a foaming liquid filled with nitrogen;
  • Precast concrete slurry The material and water are added to the stirring device and stirred and mixed into a concrete slurry; [0026] (3) Preparation of foamed concrete slurry: The foaming liquid filled with nitrogen is added to the concrete slurry and stirred thoroughly.
  • the production line of the above production process includes a control device, a storage device 1, an upper mold device 2, a temperature control chamber 7, a foaming device 5, a stirring device 3, and a transfer device 4, and a storage device 1
  • the material and water in the interior are metered and transferred to the stirring device 3 for stirring, and the foam filled with nitrogen is prepared by the foaming device 5 and sent to the stirring device 3, and the various materials and foams in the stirring device 3 are sufficient.
  • the foamed concrete slurry having a dry density and a density ratio of 100:70; the foamed concrete slurry is injected into the mold of the upper mold device 2, and then transported by the transport device 4 to the temperature control chamber 7 Insulation maintenance, after the foamed concrete has a certain hardness, it is transported by the transport device 4 to the demolding device 8 for mechanical demolding, and the foamed concrete after the demolding is sequentially transferred to the cross-cut device 9 and the vertical cutting device 10 via the transport device 4.
  • Automatic cutting is performed, and the control device controls the start and stop of the transmission device 4, the cross-cut device 9, and the vertical cutting device 10,
  • the product is positioned and cross-cut and vertical cut are completed in a specified size, cut into finished products, and finally transported by the transport device 4 to the packaging area.
  • the nitrogen foam foaming device 5 used in the above-mentioned nitrogen foam concrete self-insulating block production process includes a foaming agent storage tank 11, a vacuum foaming tank 12, a compressed nitrogen tube 13, and a plunger pump 14. And a hose pump 16, which mixes the animal protein foaming agent and water in the foaming agent storage tank 11 to form a foaming liquid, wherein the ratio of the animal protein foaming agent and the water in the foaming liquid is 1:25;
  • the plug pump 14 feeds the foaming liquid into the vacuum foaming tank 12, and the foaming liquid collides with the spiral wire 15 in the vacuum foaming tank 12 to uniformly foam, and the nitrogen gas from the nitrogen tank 18 is compressed by the air compressor 17.
  • Nitrogen gas with a content of 99.99% is prepared into the nitrogen tank 18 by using a nitrogen generating device, and a foam filled with nitrogen is prepared by the foaming device 5 under a closed condition, and the foam filled with nitrogen is further introduced into the stirring device 3 and various materials are fully performed. Stir and mix to obtain a foamed concrete slurry.
  • the foamed concrete which is cast in the upper mold device 2 is insulated by an electric heater or a steam tube to be cured to have the hardness it deserves.
  • the foam concrete self-insulating block obtained by cutting the foam concrete product produced by the above method is naturally maintained for 28 days, and the product performance can reach: thermal conductivity 0.7-0.9 MPa, compressive strength 3.5 or more, bulk density 500 Kg / m 3 ;
  • the thermal conductivity of the foamed concrete self-insulating block is 30%-50 ⁇ 3 ⁇ 4 lower than that of the conventional foamed concrete product filled with ordinary air, which greatly improves the thermal insulation performance of the product, and the product contains 99.99% nitrogen inside. Because nitrogen has poor fluidity, high density, good stability and does not easily overflow, it can achieve long-lasting thermal insulation effect; the foam inside the foam concrete produced by the old process contains oxygen and carbon dioxide, which will oxidize the product material.
  • the service life of the product is reduced, and the foam concrete foam produced by the invention replaces oxygen and carbon dioxide with nitrogen gas to avoid oxidation reaction, thereby prolonging the service life of the product; in addition, since nitrogen is the most gas in the air, It has a content of 78% in the air, however some companies put the air
  • the residual gas in the oxygen extraction is basically nitrogen gas, and oxygen accounts for only 21% of the air, so we can use some nitrogen to make a good building material product, which reduces the overall cost of the product.
  • the invention has the advantages of simple process and low production cost, and the nitrogen-filled foam concrete self-insulating block is much more cost-effective than the traditional product, and can improve the heat preservation of the foam concrete self-insulating block. Insulation performance, reduce thermal conductivity, extend the service life of foam concrete self-insulating blocks (

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
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Abstract

一种氮气泡沫混凝土自保温砌块生产工艺，包括以下步骤：预制充有氮气的发泡液，预制混凝土浆液，制备发泡混凝土浆液，浇注成型，保温、脱模。同时还提供一种氮气泡沫混凝土自保温砌块生产工艺所用的造泡装置，包括发泡剂储罐(11)、真空发泡罐(12)、压缩氮气管(13)、第一输送泵(14)和第二输送泵(16)。该砌块具有导热系数低、耐用的优点。

Description

氮气泡沫混凝土自保温砌块生产工艺及其造泡装置 技术领域
[0001] 本发明涉及建筑材料生产技术领域，尤其涉及一种氮气泡沫混凝土自保温砌块生 产工艺及其造泡装置。 背景技术
[0002] 随着我国建筑节能工作的全面推进和不断深化,对不同形式保温体系提出了迫切 需求， 节能与结构一体化成为结构体系发展和应用的重要方向。 外墙外自温是 建筑节能工作的重要一环， 自保温砌块作为节能与结构一体化的一种主要墙体 材料就得到了迅速发展。
[0003] 泡沫混凝土自保温砌块作为其中一种常用的自保温墙体材料， 属于无机类轻质 保温材料， 具有良好的热工性能、 物理力学性能和不燃性能， 施工和填充性能 好， 可实现砌块生产线上的在线填充， 与砌块同吋养护， 其生产设备已经达到 了自动化、 高效率的生产水平。 但是目前泡沫混凝土大多采用化学发泡方法,是 物质发生化学反应而产生新的气体进行发泡， 化学发泡的主要特征是泡沫无泡 壁， 稳定性差， 必须以水泥等材料的水化产物作为基材才能稳定存在， 且泡沫 泡径大小随着压力的不同和发泡物质的多少而变化， 难以控制。
技术问题
[0004] 本发明所要解决的技术问题是提供一种工艺简单、 生产成本低的一种氮气泡沫 混凝土自保温砌块生产工艺及其造泡装置， 降低导热系数， 可提高泡沫混凝土 自保温砌块的保温隔热性能， 延长泡沫混凝土自保温砌块的使用寿命。
问题的解决方案
技术解决方案
[0005] 为解决上述技术问题， 本发明所采取的技方案是：
[0006] 一种氮气泡沫混凝土自保温砌块生产工艺， 包括以下步骤：
[0007] (一） 预制充有氮气的发泡液： 将动物蛋白发泡剂和水混合后形成发泡液， 将 氮气充入发泡液中， 形成充有氮气的发泡液； [0008] (二） 预制混凝土浆液： 将物料和水加入搅拌装置中搅拌混合为混凝土浆液； [0009] (三） 制备发泡混凝土浆液： 将充有氮气的发泡液加入混凝土浆液中充分搅拌
， 得到发泡混凝土浆液；
[0010] (四） 浇注成型： 将发泡混凝土浆液注入模具中浇注成型；
[0011] (五） 保温、 脱模： 将浇注成型的发泡混凝土保温养护一段吋间后进行脱模。
[0012] 优选的， 所述造泡装置包括发泡剂储罐、 真空发泡罐、 压缩氮气管、 柱塞泵和 软管泵， 在发泡剂储罐内将动物蛋白发泡剂和水混合后形成发泡液， 通过柱塞 泵将发泡液输入真空发泡罐内， 发泡液与真空发泡罐内的螺旋状丝带发生碰撞 均匀发泡， 自氮气罐出来的氮气经空压机压缩后形成高压氮气， 高压氮气再进 入真空发泡罐内充填到发泡液的泡沫中。
[0013] 优选的， 所述发泡液中动物蛋白发泡剂和水的配比为 1:25。
[0014] 优选的， 所述泡沫混凝土浆液的密度及其干密度比值为 70:100。
[0015] 上述氮气泡沫混凝土自保温砌块生产工艺所用的氮气泡沫造泡装置， 包括发泡 剂储罐、 真空发泡罐、 压缩氮气管、 第一输送泵和第二输送泵， 所述发泡剂储 罐内盛有动物蛋白发泡剂水溶液， 所述发泡剂储罐通过第一输送泵及管路与真 空发泡罐连通， 所述压缩氮气管与真空发泡罐连通， 所述真空发泡罐通过第二 输送泵及输料管将物料输送至搅拌装置内， 所述真空发泡罐内均布螺旋状丝带
[0016] 优选的， 所述螺旋状丝带为螺旋状金属丝。
[0017] 优选的， 所述第一输送泵为柱塞泵， 所述第二输送泵为软管泵。
发明的有益效果
有益效果
[0018] 采用上述技术方案所产生的有益效果在于： 利用造泡装置将氮气充入发泡液中 形成充有氮气的发泡液， 再进入搅拌装置中与混凝土浆液充分混合形成发泡混 凝土浆液， 然后注入模具中浇注成型， 进行一段吋间保温后再进行脱模， 得到 充有氮气的发泡混凝土砌块。 本发明具有工艺简单、 生产成本低的优点， 生产 的发泡混凝土砌块具有导热系数低、 保温隔热性能高、 使用寿命长的特点， 适 合推广应用。 对附图的简要说明
附图说明
[0019] 图 1是本发明实施例中所用生产线的结构示意图；
[0020] 图 2是图 1中造泡装置的示意图；
[0021] 图中： 1-储料装置， 2-上模装置， 3-搅拌装置， 4-传输装置， 5-造泡装置， 6-输 料管， 7-温控室， 8-脱模装置， 9-横切装置， 10-竖切装置， 11-发泡剂储罐， 12- 真空发泡罐， 13-压缩氮气管， 14-第一输送泵， 15-螺旋状丝带， 16-第二输送泵 ， 17-空压机， 18-氮气罐。
实施该发明的最佳实施例
本发明的最佳实施方式
[0022] 下面结合附图和具体实施方式对本发明作进一步详细的说明。
[0023] 一种氮气泡沫混凝土自保温砌块生产工艺包括以下步骤：
[0024] (一） 预制充有氮气的发泡液： 将动物蛋白发泡剂和水混合后形成发泡液， 将 氮气充入发泡液中， 形成充有氮气的发泡液；
[0025] (二） 预制混凝土浆液： 将物料和水加入搅拌装置中搅拌混合为混凝土浆液； [0026] (三） 制备发泡混凝土浆液： 将充有氮气的发泡液加入混凝土浆液中充分搅拌
， 得到发泡混凝土浆液；
[0027] (四） 浇注成型： 将发泡混凝土浆液注入模具中浇注成型；
[0028] (五） 保温、 脱模： 将浇注成型的发泡混凝土保温养护一段吋间后进行脱模。
[0029] 如图 1所示， 上述生产工艺的生产线包括控制装置、 储料装置 1、 上模装置 2、 温控室 7、 造泡装置 5、 搅拌装置 3和传输装置 4， 储料装置 1内的物料和水按需计 量后输送至搅拌装置 3内搅拌， 同吋利用造泡装置 5制备出充有氮气的泡沫并输 送至搅拌装置 3内， 在搅拌装置 3内各种物料与泡沫充分混合得到泡沫混凝土浆 液， 所述泡沫混凝土浆液的干密度及其密度比值为 100:70; 泡沫混凝土浆液再注 入到上模装置 2的模具内浇注成型后， 由传输装置 4运输至温控室 7保温养护， 待 泡沫混凝土具备一定硬度后再由传输装置 4输送至脱模装置 8中进行机械脱模， 脱模成型后的泡沫混凝土经传输装置 4依次传送到横切装置 9和竖切装置 10进行 自动切割， 由控制装置来控制传输装置 4、 横切装置 9和竖切装置 10的启停， 进 行产品定位并按指定尺寸完成横切和竖切， 切割成成品， 最后由传输装置 4运输 到包装区。
[0030] 如图 2所示， 上述氮气泡沫混凝土自保温砌块生产工艺所用的氮气泡沫造泡装 置 5包括发泡剂储罐 11、 真空发泡罐 12、 压缩氮气管 13、 柱塞泵 14和软管泵 16， 在发泡剂储罐 11内将动物蛋白发泡剂和水混合后形成发泡液， 发泡液中动物蛋 白发泡剂和水的配比为 1:25; 通过柱塞泵 14将发泡液输入真空发泡罐 12内， 发泡 液与真空发泡罐 12内的螺旋状金属丝 15发生碰撞均匀发泡， 自氮气罐 18出来的 氮气经空压机 17压缩后形成高压氮气， 高压氮气再进入真空发泡罐 12内充填到 发泡液的泡沫中。 利用制氮设备制备出含量为 99.99%的氮气进入氮气罐 18， 在 密闭条件下经造泡装置 5制备出充有氮气的泡沫， 充有氮气的泡沫再进入搅拌装 置 3与各种物料进行充分搅拌， 混合得到泡沫混凝土浆液。
[0031] 其中， 在温控室 7内通过电加热器或蒸汽管对上模装置 2内浇注成型的泡沫混凝 土进行保温， 使其得到养护具备应有的硬度。
[0032] 利用上述方法生产的泡沫混凝土制品经切割后得到的泡沫混凝土自保温砌块自 然养护 28天， 产品性能可达： 导热系数 0.7-0.9MPa,抗压强度 3.5以上， 容重 500Kg /m3; 这种泡沫混凝土自保温砌块比传统的充填普通空气所制泡沫混凝土制品导 热系数降低 30%-50<¾， 大大提高了产品的保温隔热性能， 同吋由于该产品内部 含有 99.99%的氮气， 因为氮气的流动性差、 密度大、 稳定性好不容易溢出， 能 起到持久保温隔热的效果； 采用旧工艺生产的泡沫混凝土内部气泡内含氧气及 二氧化碳对产品材料会起到氧化作用， 大大降低了产品的使用寿命， 而采用本 发明生产的泡沫混凝土气泡内则用氮气替代氧气及二氧化碳， 避免发生氧化反 应， 就延长了产品的使用寿命； 另外， 由于氮气是空气中含量最多的气体， 它 在空气中含量为 78%， 然而一些企业把空气中的氧气提取后剩余气体基本都是氮 气了， 而氧气在空气中占比重只有 21%， 所以说我们利用一些氮气就能制成很好 的建材产品， 降低了产品的综合造价。
工业实用性
[0033] 综上所述， 本发明具有工艺简单、 生产成本低的优点， 充氮气的泡沫混凝土自 保温砌块比传统的产品性价比要高很多， 可提高泡沫混凝土自保温砌块的保温 隔热性能， 降低导热系数， 延长泡沫混凝土自保温砌块的使用寿命 (

Claims

权利要求书
[权利要求 1] 一种氮气泡沫混凝土自保温砌块生产工艺， 包括以下步骤：
预制充有氮气的发泡液： 将动物蛋白发泡剂和水混合后形成发泡液， 将氮气充入发泡液中， 形成充有氮气的发泡液；
预制混凝土浆液： 将物料和水加入搅拌装置中搅拌混合为混凝土浆液 制备发泡混凝土浆液： 将充有氮气的发泡液加入混凝土浆液中充分搅 拌， 得到发泡混凝土浆液；
浇注成型： 将发泡混凝土浆液注入模具中浇注成型； 保温、 脱模： 将浇注成型的发泡混凝土保温养护一段吋间后进行脱模
[权利要求 2] 根据权利要求 1所述的氮气泡沫混凝土自保温砌块生产工艺， 其特征 在于： 所述发泡液中动物蛋白发泡剂和水的配比为 1:25。
[权利要求 3] 根据权利要求 1所述的氮气泡沫混凝土自保温砌块生产工艺， 其特征 在于： 所述泡沫混凝土浆液的密度及其干密度比值为 70:100。
[权利要求 4] 根据权利要求 1所述的氮气泡沫混凝土自保温砌块生产工艺所用的氮 气泡沫造泡装置， 其特征在于： 包括发泡剂储罐 （11) 、 真空发泡罐
(12) 、 压缩氮气管 （13) 、 第一输送泵 （14) 和第二输送泵 （16) ， 所述发泡剂储罐 （11) 内盛有动物蛋白发泡剂水溶液， 所述发泡剂 储罐 （11) 通过第一输送泵 （14) 及管路与真空发泡罐 （12) 连通， 所述压缩氮气管 （13) 与真空发泡罐 （12) 连通， 所述真空发泡罐 （ 12) 通过第二输送泵 （16) 及输料管 （6) 将物料输送至搅拌装置 （3 ) 内， 所述真空发泡罐 （12) 内均布螺旋状丝带 （15) 。
[权利要求 5] 根据权利要求 4所述的造泡装置， 其特征在于： 所述螺旋状丝带 （15
) 为螺旋状金属丝。
[权利要求 6] 根据权利要求 4所述的造泡装置， 其特征在于： 所述第一输送泵 （14
) 为柱塞泵， 所述第二输送泵 （17) 为软管泵。
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