WO2009043231A1 - A method and an apparatus for directly heating slurry - Google Patents
A method and an apparatus for directly heating slurry Download PDFInfo
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- WO2009043231A1 WO2009043231A1 PCT/CN2008/001642 CN2008001642W WO2009043231A1 WO 2009043231 A1 WO2009043231 A1 WO 2009043231A1 CN 2008001642 W CN2008001642 W CN 2008001642W WO 2009043231 A1 WO2009043231 A1 WO 2009043231A1
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- steam
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- direct heating
- dissolver
- heating
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
- C01F7/062—Digestion
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
- C01F7/062—Digestion
- C01F7/064—Apparatus for digestion, e.g. digestor vessels or heat exchangers
Definitions
- the invention relates to a method and a device for directly heating a slurry, in particular to a method and a device for directly heating an bauxite slurry in a pressing and dissolving process in an alumina production process.
- the indirect heating method is generally used to heat the pulp in the boiling cooking and dissolving process.
- the condensed water needs to be re-evaporated by using equipment to fully utilize the steam heat.
- the indirect heating of the slurry of the slurry requires special stirring to prevent Solid particle deposition.
- the pulp is also heated by direct heating.
- the direct heating can fully utilize the heat of the steam, the heat utilization rate is high, the heating effect is not affected by the slurry enthalpy, and the condensed water is not required from the evaporation system, and the direct heating of the dissolver does not require a stirring device.
- the heating medium is generally saturated or superheated steam, for example, a mixed slurry in which a superheated steam is directly heated and subjected to a digestion and dissolution process in a diaspore process by a two-flow method. Since the dissolution temperature of diaspore is relatively high, generally exceeds 260 ° C, and the steam is directly heated at such a high temperature, which requires the pressure of the steam to be at least greater than the saturated vapor pressure of the sodium aluminate solution at 260 ° C, so How to safely use steam under high temperature and high pressure, make full use of steam heat, prevent slurry from flowing back to steam boiler, and ensure that bauxite is in optimal dissolution temperature, so that the whole process can be operated continuously, automatically, safely and stably, which is reduced in alumina production. An important measure for energy consumption, energy conservation, increased operating rate, and improved economic efficiency. Summary of the invention
- the present invention provides a direct slurry heating method and equipment, the purpose of which is to directly use the steam to heat the bauxite slurry to achieve an optimum dissolution temperature, and the whole process can ensure the full utilization of steam heat and ensure Continuous, automatic, safe and stable operation, thereby reducing equipment investment, reducing energy consumption, saving energy and improving economic efficiency.
- a direct slurry heating method comprising the steps of: inputting the heated slurry through a slurry pipe into a direct heating dissolver, and inputting the steam through a steam pipe to a direct heating dissolution
- the slurry is mixed with the slurry to heat the ore.
- the direct heating method of the slurry further comprises the steps of: directly releasing the pressure in the dissolver through the safety valve when the pressure exceeds the working pressure, and discharging the material discharged from the pressure discharge to the trench through the discharge device.
- the steam enters the steam buffer before entering the direct heating vessel.
- the steam enters from the bottom of the direct heating vessel.
- the steam passes through the check valve before entering the direct heating vessel.
- the direct heating dissolver is connected in series, and adjacent two-stage direct heating dissolvers are connected by pipelines.
- the slurry and steam in the direct heating dissolver are piped into the next stage to directly heat the dissolver.
- the temperature detecting and controlling device connecting the pipes connecting two adjacent direct heating dissolvers and the steam pipe entering the direct heating dissolver detects the temperature in the pipe, and the temperature of the discharge directly discharging the dissolver in the pipe is lower than the temperature in the pipe. At the time of setting, the amount of steam entering the direct heating vessel is increased.
- the steam entering the steam damper is connected in parallel with a vibration bypass device for reducing the pipe and steam damper when driving.
- a direct slurry heating apparatus consisting of: directly heating a dissolver, transporting the slurry to a slurry pipe that directly heats the dissolver, and delivering the steam to a steam pipe that directly heats the dissolver.
- the top of the direct heating dissolver is provided with a safety valve and a discharge device.
- the steam conduit is in communication with the steam buffer and then in communication with the direct heating vessel.
- the top of the steam damper is provided with a safety valve and a discharge device.
- a check valve is disposed between the steam damper and the direct heating dissolver.
- the check valve is located at the steam inlet of the direct heating vessel.
- the direct heating dissolvers are connected in series by a pipe.
- the conduit between the adjacent direct heating dissolvers is in communication with the steam conduit.
- a temperature detecting control device is connected between the pipe and the steam pipe between the adjacent direct heating dissolvers.
- the bypass device is connected to the steam damper via a steam pipe.
- the bottom of the steam damper is provided with a steam trap.
- the invention adopts steam to directly heat the slurry, which can completely utilize the steam heat, improve the heat utilization rate, save equipment investment, save the stirring electric energy, and ensure that the bauxite is dissolved at the optimum dissolution temperature at all times, and the whole process is continuous and automatic. Safe, stable operation, which is very important for saving investment, reducing energy consumption, saving energy, improving economic efficiency, increasing labor productivity and the level of automation throughout the plant.
- FIG. 1 is a schematic view showing the structure of a direct heating method and apparatus of the present invention.
- the present invention relates to a direct heating method for a slurry, comprising the steps of: inputting the heated slurry 1 through a slurry pipe into a first-stage direct heating dissolver 2, directly heating the dissolver 2 from the last stage, and passing the steam 5 through
- the steam pipe is input to the steam buffer 7 and then enters each direct heating dissolver 2 to mix with the slurry to heat the slurry.
- the steam 5 enters the direct heating dissolver 2 from the bottom, so that the slurry can be stirred to directly heat the dissolver.
- the temperature detecting and controlling device 9 connecting the two adjacent direct heating dissolver 2 pipes and the steam pipe entering the direct heating dissolver 2 detects the temperature in the pipe, and the temperature of the discharge directly in the pipe is lower than the temperature in the pipe. At the time of setting, the amount of steam entering the direct heating vessel is increased.
- a direct slurry heating device consisting of the following parts: It is connected in series by a plurality of direct heating dissolvers 2, and the adjacent two direct heating dissolvers 2 are passed through the heated slurry.
- the delivery pipes are connected in series, and each direct heating dissolver 2 is connected to the steam buffer 7 through a steam delivery pipe, and the direct heating dissolver 2 is connected to the check valve 8 and the temperature detecting control device 9, and the temperature detecting control device 9 is directly heated.
- the pipe between the dissolver 2 is connected to a steam pipe, and the bypass device 6 is connected to the steam damper 7 through a steam pipe, and the bypass device 6 serves to reduce vibration of the pipe and the steam damper 7 at the time of driving.
- a safety valve 3 is mounted on the top of the direct heating dissolver 2 and the steam damper 7, the discharge device 4 is connected to the safety valve 3, and the safety valve discharge device 4 is connected through a material pipe.
- a steam trap 10 is installed on the bottom drain pipe of the steam buffer 7, and water accumulated in the operation of the steam buffer 7 is discharged into the trench through the steam trap 10; a check valve 8 is provided between the steam buffer 7 and the direct heating dissolver 2 The check valve 8 is disposed at the steam inlet of the direct heating dissolver 2 to prevent the slurry from flowing backward.
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Abstract
A method and an apparatus for directly heating slurry are provided, especially, a method and an apparatus for directly heating bauxite slurry during digesting process in production of alumina are provided. Direct heating digester, steam buffer, temperature detector etc are used in the apparatus. The advantages are that the apparatus is simple, the steam is fully utilized, the heating efficiency is high, the investment of apparatus is reduced, bauxite slurry is digested at optimum temperature at all the time, the whole process is continuous, automatic, safe, and stable. The investment and energy consumption are reduced, and the economic benefit, labour productivity, and automation level are improved.
Description
一种矿浆直接加热方法及设备 技术领域 Direct slurry heating method and equipment
本发明涉及一种矿浆直接加热方法及设备， 尤其涉及一种氧化铝 生产过程中压煮溶出工序的铝矾土矿浆直接加热方法及设备。 背景技术 The invention relates to a method and a device for directly heating a slurry, in particular to a method and a device for directly heating an bauxite slurry in a pressing and dissolving process in an alumina production process. Background technique
现有氧化铝厂中一般采用间接加热方式加热压煮溶出工序中的矿 浆， 采用蒸汽间接加热后冷凝水需要利用设备再蒸发以充分利用蒸汽 热量， 间接加热矿浆的溶出器需要采用专门搅拌来防止固体颗粒沉积。 但是随着新工艺、 新技术的发展， 矿浆也采用直接加热方式加热。 直 接加热可以完全利用蒸汽的热量， 热利用率高， 加热效果不受料浆结 疤的影响， 而且不需要冷凝水自蒸发系统， 直接加热溶出器也不需要 搅拌装置。 加热介质一般都是饱和或过热的蒸汽， 例如采用双流法溶 出一水硬铝石工艺中采用过热蒸汽直接加热压煮溶出工序的混和矿 浆。 由于一水硬铝石的溶出温度比较高， 一般都超过 260°C， 在如此高 温度下使用蒸汽直接加热，这需要蒸汽的压力至少大于 260°C下铝酸钠 溶液的饱和蒸汽压， 因此如何在高温高压下安全使用蒸汽， 充分利用 蒸汽热量， 防止矿浆逆流回蒸汽锅炉， 又能保证铝土矿处于最佳溶出 温度， 使整个过程连续、 自动、 安全稳定运行， 是氧化铝生产中降低 能耗、 节约能源、 提高运转率、 提高经济效益的一项重要措施。 发明内容 In the existing alumina plant, the indirect heating method is generally used to heat the pulp in the boiling cooking and dissolving process. After indirect heating by steam, the condensed water needs to be re-evaporated by using equipment to fully utilize the steam heat. The indirect heating of the slurry of the slurry requires special stirring to prevent Solid particle deposition. However, with the development of new processes and new technologies, the pulp is also heated by direct heating. The direct heating can fully utilize the heat of the steam, the heat utilization rate is high, the heating effect is not affected by the slurry enthalpy, and the condensed water is not required from the evaporation system, and the direct heating of the dissolver does not require a stirring device. The heating medium is generally saturated or superheated steam, for example, a mixed slurry in which a superheated steam is directly heated and subjected to a digestion and dissolution process in a diaspore process by a two-flow method. Since the dissolution temperature of diaspore is relatively high, generally exceeds 260 ° C, and the steam is directly heated at such a high temperature, which requires the pressure of the steam to be at least greater than the saturated vapor pressure of the sodium aluminate solution at 260 ° C, so How to safely use steam under high temperature and high pressure, make full use of steam heat, prevent slurry from flowing back to steam boiler, and ensure that bauxite is in optimal dissolution temperature, so that the whole process can be operated continuously, automatically, safely and stably, which is reduced in alumina production. An important measure for energy consumption, energy conservation, increased operating rate, and improved economic efficiency. Summary of the invention
为解决上述技术问题本发明提供的一种矿浆直接加热方法及设 备， 目的是直接利用蒸汽加热铝矾土矿浆， 使之达到最佳溶出温度， 整个过程既能确保完全利用蒸汽热量， 又能保证连续、 自动、 安全稳 定运行， 从而减少设备投资， 降低能耗、 节约能源、 提高经济效益。 In order to solve the above technical problem, the present invention provides a direct slurry heating method and equipment, the purpose of which is to directly use the steam to heat the bauxite slurry to achieve an optimum dissolution temperature, and the whole process can ensure the full utilization of steam heat and ensure Continuous, automatic, safe and stable operation, thereby reducing equipment investment, reducing energy consumption, saving energy and improving economic efficiency.
为达上述目的， 本发明是这样实现的： 一种矿浆直接加热方法， 包括下述步骤： 将被加热的矿浆通过矿浆管道输入到直接加热溶出器 中， 将蒸汽通过蒸汽管道输入到直接加热溶出器中与矿浆混合加热矿 桨。
所述矿浆直接加热方法， 还包括下述步骤： 直接加热溶出器内的 压力超过工作压力时通过安全阀泄压， 并将泄压排出的物料通过排料 装置排出到地沟。 To achieve the above object, the present invention is achieved as follows: A direct slurry heating method comprising the steps of: inputting the heated slurry through a slurry pipe into a direct heating dissolver, and inputting the steam through a steam pipe to a direct heating dissolution The slurry is mixed with the slurry to heat the ore. The direct heating method of the slurry further comprises the steps of: directly releasing the pressure in the dissolver through the safety valve when the pressure exceeds the working pressure, and discharging the material discharged from the pressure discharge to the trench through the discharge device.
所述蒸汽先进入蒸汽緩沖器后再进入直接加热溶出器。 The steam enters the steam buffer before entering the direct heating vessel.
所述的蒸汽从直接加热溶出器的底部进入。 The steam enters from the bottom of the direct heating vessel.
所述的蒸汽进入直接加热溶出器前先经过止回阀。 The steam passes through the check valve before entering the direct heating vessel.
所述的直接加热溶出器为多台串联连接， 相邻两级直接加热溶出 器之间通过管路连接。 The direct heating dissolver is connected in series, and adjacent two-stage direct heating dissolvers are connected by pipelines.
所述的直接加热溶出器内的矿浆和蒸汽通过管道进入下一级直接 加热溶出器内。 The slurry and steam in the direct heating dissolver are piped into the next stage to directly heat the dissolver.
所述连通两个相邻直接加热溶出器的管道与进入到直接加热溶出 器的蒸汽管道之间的温度检测控制装置检测管道内温度， 直接加热溶 出器的出料在管道内的温度低于设定值时， 增加蒸汽进入到直接加热 溶出器的量。 The temperature detecting and controlling device connecting the pipes connecting two adjacent direct heating dissolvers and the steam pipe entering the direct heating dissolver detects the temperature in the pipe, and the temperature of the discharge directly discharging the dissolver in the pipe is lower than the temperature in the pipe. At the time of setting, the amount of steam entering the direct heating vessel is increased.
所述的蒸汽緩沖器内的压力超过工作压力时通过安全阀泄压， 并 将泄压排出的蒸汽通过排料装置排出到地沟。 When the pressure in the steam damper exceeds the working pressure, the pressure is released through the safety valve, and the steam discharged from the pressure discharge is discharged to the trench through the discharge device.
所述的蒸汽进入蒸汽緩沖器的蒸汽管路上并联有用于减小开车时 管道和蒸汽緩冲器的振动旁路装置。 The steam entering the steam damper is connected in parallel with a vibration bypass device for reducing the pipe and steam damper when driving.
一种矿浆直接加热设备， 由下述部分构成： 直接加热溶出器， 将 矿浆输送到直接加热溶出器的矿浆管道， 将蒸汽输送到直接加热溶出 器的蒸汽管道。 A direct slurry heating apparatus consisting of: directly heating a dissolver, transporting the slurry to a slurry pipe that directly heats the dissolver, and delivering the steam to a steam pipe that directly heats the dissolver.
所述的直接加热溶出器的顶部设有安全阀和排料装置。 The top of the direct heating dissolver is provided with a safety valve and a discharge device.
所述蒸汽管道与蒸汽緩沖器连通后再与直接加热溶出器连通。 所述的蒸汽緩冲器的顶部设有安全阀和排料装置。 The steam conduit is in communication with the steam buffer and then in communication with the direct heating vessel. The top of the steam damper is provided with a safety valve and a discharge device.
所述的蒸汽緩沖器与直接加热溶出器之间设有止回阀。 A check valve is disposed between the steam damper and the direct heating dissolver.
所述的止回阀设在直接加热溶出器的蒸汽进口处。 The check valve is located at the steam inlet of the direct heating vessel.
所述的直接加热溶出器之间通过管道串接。 The direct heating dissolvers are connected in series by a pipe.
所述的相邻直接加热溶出器之间的管道与蒸汽管道连通。 The conduit between the adjacent direct heating dissolvers is in communication with the steam conduit.
所述的相邻直接加热溶出器之间的管道和蒸汽管道之间连接有温 度检测控制装置。 A temperature detecting control device is connected between the pipe and the steam pipe between the adjacent direct heating dissolvers.
旁路装置通过蒸汽管与所述的蒸汽緩冲器连接。 The bypass device is connected to the steam damper via a steam pipe.
所述的蒸汽緩冲器的底部设有疏水器。
本发明的优点和效果如下： The bottom of the steam damper is provided with a steam trap. The advantages and effects of the present invention are as follows:
本发明采用蒸汽直接加热矿浆， 既能够完全利用蒸汽热量、 提高 热利用率、 节省设备投资、 节约搅拌电能， 又能保证铝土矿时刻在最 佳溶出温度下溶出， 而且整个过程是连续、 自动、 安全、 稳定运行， 这对节省投资， 降低能耗、 节约能源、 提高经济效益、 提高劳动生产 率和全厂自动化水平有非常重要的意义。 附图说明 The invention adopts steam to directly heat the slurry, which can completely utilize the steam heat, improve the heat utilization rate, save equipment investment, save the stirring electric energy, and ensure that the bauxite is dissolved at the optimum dissolution temperature at all times, and the whole process is continuous and automatic. Safe, stable operation, which is very important for saving investment, reducing energy consumption, saving energy, improving economic efficiency, increasing labor productivity and the level of automation throughout the plant. DRAWINGS
图 1是本发明矿浆直接加热方法及设备结构示意图。 1 is a schematic view showing the structure of a direct heating method and apparatus of the present invention.
附图中： 1、 被加热矿浆； 2、 直接加热溶出器； 3、 安全阀； 4、 排料装置； 5、 蒸汽； 6、 旁路装置； 7、 蒸汽緩冲器； 8、 止回阀； 9、 温度检测控制装置； 10、 疏水器。 具体实施方式 In the drawings: 1. heated pulp; 2, direct heating dissolver; 3, safety valve; 4, discharge device; 5, steam; 6, bypass device; 7, steam buffer; 8, check valve 9, temperature detection control device; 10, steam trap. detailed description
下面对发明的实施例结合附图加以详细描述， 但本发明的保护范 围不受实施例所限。 The embodiments of the invention are described in detail below with reference to the drawings, but the scope of the invention is not limited by the embodiments.
本发明一种矿浆直接加热方法， 包括下述步骤： 将被加热的矿浆 1 通过矿浆管道输入到第一级直接加热溶出器 2 中， 从最后一级直接加 热溶出器 2流出， 将蒸汽 5通过蒸汽管道输入到蒸汽緩沖器 7后再进 入各直接加热溶出器 2 中与矿浆混合加热矿浆， 蒸汽 5是从底部进入 直接加热溶出器 2 的， 这样可以起到搅拌矿浆的作用， 直接加热溶出 器 2 内的压力超过工作压力时通过安全阀 3泄压， 并将泄压排出的物 料通过排料装置 4排出到地沟； 直接加热溶出器 2 内的矿浆和蒸汽通 过管道进入下一级直接加热溶出器内。 The present invention relates to a direct heating method for a slurry, comprising the steps of: inputting the heated slurry 1 through a slurry pipe into a first-stage direct heating dissolver 2, directly heating the dissolver 2 from the last stage, and passing the steam 5 through The steam pipe is input to the steam buffer 7 and then enters each direct heating dissolver 2 to mix with the slurry to heat the slurry. The steam 5 enters the direct heating dissolver 2 from the bottom, so that the slurry can be stirred to directly heat the dissolver. 2 When the pressure inside the working pressure exceeds the working pressure, the pressure is released through the safety valve 3, and the discharged material is discharged to the trench through the discharging device 4; the slurry and steam in the direct-dissolving device 2 are directly heated to the next level through the pipeline to directly dissolve and dissolve. Inside the device.
上述连通两个相邻直接加热溶出器 2 管道与进入到直接加热溶出 器 2蒸汽管道之间的温度检测控制装置 9检测管道内温度， 直接加热 溶出器的出料在管道内的温度低于设定值时， 增加蒸汽进入到直接加 热溶出器的量。 The temperature detecting and controlling device 9 connecting the two adjacent direct heating dissolver 2 pipes and the steam pipe entering the direct heating dissolver 2 detects the temperature in the pipe, and the temperature of the discharge directly in the pipe is lower than the temperature in the pipe. At the time of setting, the amount of steam entering the direct heating vessel is increased.
当蒸汽緩沖器 7 内的压力超过工作压力时通过安全阀 3 泄压， 并 将泄压排出的蒸汽通过排料装置 4排出到地沟。 When the pressure in the steam damper 7 exceeds the working pressure, the pressure is released through the safety valve 3, and the steam discharged from the pressure relief is discharged to the trench through the discharge device 4.
一种矿浆直接加热设备， 由下述部分构成： 它由多台直接加热溶 出器 2 串联连接， 相邻两台直接加热溶出器 2之间通过被加热矿浆输
送管道串接，每台直接加热溶出器 2通过蒸汽输送管道和蒸汽緩冲器 7 连接， 直接加热溶出器 2与止回阀 8和温度检测控制装置 9连接， 温 度检测控制装置 9与直接加热溶出器 2之间的管道和蒸汽管道连接， 旁路装置 6通过蒸汽管与蒸汽緩沖器 7连接， 旁路装置 6用于减小开 车时管道和蒸汽緩沖器 7振动。 A direct slurry heating device consisting of the following parts: It is connected in series by a plurality of direct heating dissolvers 2, and the adjacent two direct heating dissolvers 2 are passed through the heated slurry. The delivery pipes are connected in series, and each direct heating dissolver 2 is connected to the steam buffer 7 through a steam delivery pipe, and the direct heating dissolver 2 is connected to the check valve 8 and the temperature detecting control device 9, and the temperature detecting control device 9 is directly heated. The pipe between the dissolver 2 is connected to a steam pipe, and the bypass device 6 is connected to the steam damper 7 through a steam pipe, and the bypass device 6 serves to reduce vibration of the pipe and the steam damper 7 at the time of driving.
在直接加热溶出器 2和蒸汽緩冲器 7的顶部安装安全阀 3，排料装 置 4与安全阀 3连接， 各安全阀排料装置 4通过料管连接。 蒸汽緩冲 器 7底部排水管上安装疏水器 10, 蒸汽緩沖器 7工作中积累的水通过 疏水器 10排入地沟； 蒸汽緩冲器 7与直接加热溶出器 2之间设有止回 阀 8 , 止回阀 8设在直接加热溶出器 2的蒸汽进口处， 防止矿浆逆流。
A safety valve 3 is mounted on the top of the direct heating dissolver 2 and the steam damper 7, the discharge device 4 is connected to the safety valve 3, and the safety valve discharge device 4 is connected through a material pipe. A steam trap 10 is installed on the bottom drain pipe of the steam buffer 7, and water accumulated in the operation of the steam buffer 7 is discharged into the trench through the steam trap 10; a check valve 8 is provided between the steam buffer 7 and the direct heating dissolver 2 The check valve 8 is disposed at the steam inlet of the direct heating dissolver 2 to prevent the slurry from flowing backward.
Claims
1、 一种矿浆直接加热方法， 其特征在于包括下述步骤： 将被加热 的矿浆通过矿浆管道输入到直接加热溶出器中， 将蒸汽通过蒸汽管道 输入到直接加热溶出器中与矿浆混合加热矿浆。 A method for directly heating a slurry, comprising the steps of: inputting the heated slurry into a direct heating dissolver through a slurry pipe, and inputting the steam through a steam pipe into a direct heating dissolver to mix with the slurry to heat the slurry. .
2、 根据权利要求 1所述的一种矿浆直接加热方法， 其特征在于还 包括下述步骤： 直接加热溶出器内的压力超过工作压力时通过安全阀 泄压， 并将泄压排出的物料通过排料装置排出到地沟。 2. A method for directly heating a slurry according to claim 1, further comprising the steps of: directly heating the pressure in the dissolver beyond the working pressure to relieve pressure through the safety valve, and passing the material discharged from the pressure relief; The discharge device is discharged to the trench.
3、 根据权利要求 1所述的一种矿浆直接加热方法， 其特征在于所 述蒸汽先进入蒸汽緩沖器后再进入直接加热溶出器。 A method of directly heating a slurry according to claim 1, wherein said steam first enters a steam buffer and then enters a direct heating dissolver.
4、 根据权利要求 3所述的一种矿浆直接加热方法， 其特征在于所 述的蒸汽从直接加热溶出器的底部进入。 A direct slurry heating method according to claim 3, wherein said steam enters from the bottom of the direct heating dissolver.
5、 根据权利要求 4所述的一种矿浆直接加热方法， 其特征在于所 述的蒸汽进入直接加热溶出器前先经过止回阀。 A method of directly heating a slurry according to claim 4, wherein said steam passes through a check valve before entering the direct heating vessel.
6、 根据权利要求 1所述的一种矿浆直接加热方法， 其特征在于所 述的直接加热溶出器为多台串联连接， 相邻两级直接加热溶出器之间 通过管路连接。 6. A method of directly heating a slurry according to claim 1, wherein said direct heating dissolver is connected in series, and adjacent two stages of direct heating dissolvers are connected by a pipe.
7、 根据权利要求 1、 2、 3、 4或 5所述的一种矿浆直接加热方法， 其特征在于所述的直接加热溶出器内的矿浆和蒸汽通过管道进入下一 级直接加热溶出器内。 7. A method for directly heating a slurry according to claim 1, 2, 3, 4 or 5, characterized in that the slurry and steam in the direct heating dissolver are passed through a pipe to the next stage to directly heat the dissolver. .
8、 根据权利要求 6所述的一种矿浆直接加热方法， 其特征在于所 述连通两个相邻直接加热溶出器的管道与进入到直接加热溶出器的蒸 汽管道之间的温度检测控制装置检测管道内温度， 直接加热溶出器的 出料在管道内的温度低于设定值时， 增加蒸汽进入到直接加热溶出器 的量。 8. A method for directly heating a slurry according to claim 6, wherein said temperature detecting means for detecting between said pipe connecting two adjacent direct heating dissolvers and a steam pipe entering said direct heating dissolver is detected. The temperature inside the pipe, the discharge of the direct heating dissolver increases the amount of steam entering the direct heating dissolver when the temperature in the pipe is lower than the set value.
9、 根据权利要求 3所述的一种矿浆直接加热方法， 其特征于所述 的蒸汽緩冲器内的压力超过工作压力时通过安全阀泄压， 并将泄压排 出的蒸汽通过排料装置排出到地沟。 9. A method of directly heating a slurry according to claim 3, wherein the pressure in the steam damper exceeds a working pressure to relieve pressure through a safety valve, and the steam discharged from the pressure relief is passed through a discharge device. Drained into the trench.
10、 根据权利要求 3 所述的一种矿浆直接加热方法， 其特征在于 所述的上述的蒸汽进入蒸汽緩沖器的蒸汽管路上并联有用于减小开车 时管道和蒸汽緩沖器振动的旁路装置。 10. A direct slurry heating method according to claim 3, wherein said steam entering said steam damper is connected in parallel with a bypass means for reducing vibration of the pipe and steam damper during driving. .
1 1、 一种矿浆直接加热设备， 其特征在于由下述部分构成： 直接
加热溶出器、 将矿浆输送到直接加热溶出器的矿浆管道、 将蒸汽输送 到直接加热溶出器的蒸汽管道。 1 1. A direct slurry heating device, characterized in that it consists of: The dissolver is heated, the slurry is transferred to a slurry pipe that directly heats the dissolver, and the steam is delivered to a steam pipe that directly heats the dissolver.
12、 根据权利要求 1 1所述的一种矿浆直接加热设备， 其特征在于 所述的直接加热溶出器的顶部设有安全阀和排料装置。 12. A slurry direct heating apparatus according to claim 11, wherein the top of the direct heating dissolver is provided with a safety valve and a discharge device.
13、 根据权利要求 1 1所述的一种矿浆直接加热设备， 其特征在于 所述蒸汽管道与蒸汽緩沖器连通后再与直接加热溶出器连通。 13. A slurry direct heating apparatus according to claim 1, wherein said steam conduit is in communication with said steam damper and then in communication with said direct heating dissolver.
14、 根据权利要求 13所述的一种矿浆直接加热设备， 其特征在于 所述的蒸汽緩沖器的顶部设有安全阀和排料装置。 14. A slurry direct heating apparatus according to claim 13, wherein said steam damper is provided with a safety valve and a discharge device at the top.
15、 根据权利要求 13所述的一种矿浆直接加热设备， 其特征在于 所述的蒸汽緩冲器与直接加热溶出器之间设有止回阀。 15. A slurry direct heating apparatus according to claim 13, wherein a check valve is provided between said steam damper and said direct heating dissolver.
16、 根据权利要求 15所述的一种矿浆直接加热设备， 其特征在于 所述的止回阀设在直接加热溶出器的蒸汽进口处。 16. A slurry direct heating apparatus according to claim 15, wherein said check valve is provided at a steam inlet of the direct heating dissolver.
17、 根据权利要求 1 1所述的一种矿浆直接加热设备， 其特征在于 所述的直接加热溶出器之间通过管道串接。 17. A slurry direct heating apparatus according to claim 1, wherein said direct heating dissolvers are connected in series by a pipe.
18、 根据权利要求 17所述的一种矿浆直接加热设备， 其特征在于 所述的相邻直接加热溶出器之间的管道与蒸汽管道连通。 18. A slurry direct heating apparatus according to claim 17, wherein said conduit between adjacent direct heating dissolvers is in communication with the steam conduit.
19、 根据权利要求 18所述的一种矿浆直接加热设备， 其特征在于 所述的相邻直接加热溶出器之间的管道和蒸汽管道之间连接有温度检 测控制装置。 A slurry direct heating apparatus according to claim 18, wherein a temperature detecting and controlling means is connected between the pipe and the steam pipe between said adjacent direct heating dissolvers.
20、 根据权利要求 1 1所述的一种矿浆直接加热设备， 其特征在于 旁路装置通过蒸汽管与蒸汽緩沖器 7连接。 20. A slurry direct heating apparatus according to claim 11, wherein the bypass means is connected to the steam damper 7 via a steam pipe.
21、 根据权利要求 13、 14、 15或 20所述的一种矿浆直接加热设 备， 其特征在于所述的蒸汽緩沖器的底部设有疏水器。
A slurry direct heating apparatus according to claim 13, 14, 15 or 20, characterized in that the bottom of the steam damper is provided with a steam trap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2008307020A AU2008307020B2 (en) | 2007-09-29 | 2008-09-23 | A method and an apparatus for directly heating slurry |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710012998.7 | 2007-09-29 | ||
| CNA2007100129987A CN101398262A (en) | 2007-09-29 | 2007-09-29 | Direct heating method and apparatus for pulp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009043231A1 true WO2009043231A1 (en) | 2009-04-09 |
Family
ID=40516980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2008/001642 WO2009043231A1 (en) | 2007-09-29 | 2008-09-23 | A method and an apparatus for directly heating slurry |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101398262A (en) |
| AU (1) | AU2008307020B2 (en) |
| WO (1) | WO2009043231A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105314663A (en) * | 2015-12-11 | 2016-02-10 | 东北大学设计研究院（有限公司） | Device for recycling red mud disposal backwater in aluminum oxide plant and use method of device |
| CN110817915A (en) * | 2019-11-25 | 2020-02-21 | 沈阳铝镁设计研究院有限公司 | Method and device for reducing steam consumption in alumina production |
| CN111644117A (en) * | 2020-06-15 | 2020-09-11 | 惠安先锋机械有限公司 | Special material dissolving and extracting device for industrial design |
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| US4128618A (en) * | 1976-08-06 | 1978-12-05 | Sumitomo Aluminium Smelting Company, Ltd. | Process for extracting alumina from alumina-containing ores |
| CN2652912Y (en) * | 2003-09-26 | 2004-11-03 | 中国铝业股份有限公司 | Three grade self evaporator by bauxite steam direct heating Bayer method digestion |
| CN2844102Y (en) * | 2005-11-28 | 2006-12-06 | 中国铝业股份有限公司 | Steam direct heater of reactive kettle |
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| DE3564300D1 (en) * | 1984-04-02 | 1988-09-15 | Kamyr Inc | Sawdust pumping, and processing |
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- 2007-09-29 CN CNA2007100129987A patent/CN101398262A/en active Pending
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2008
- 2008-09-23 WO PCT/CN2008/001642 patent/WO2009043231A1/en active Application Filing
- 2008-09-23 AU AU2008307020A patent/AU2008307020B2/en active Active
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| US4128618A (en) * | 1976-08-06 | 1978-12-05 | Sumitomo Aluminium Smelting Company, Ltd. | Process for extracting alumina from alumina-containing ores |
| CN2652912Y (en) * | 2003-09-26 | 2004-11-03 | 中国铝业股份有限公司 | Three grade self evaporator by bauxite steam direct heating Bayer method digestion |
| CN2844102Y (en) * | 2005-11-28 | 2006-12-06 | 中国铝业股份有限公司 | Steam direct heater of reactive kettle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105314663A (en) * | 2015-12-11 | 2016-02-10 | 东北大学设计研究院（有限公司） | Device for recycling red mud disposal backwater in aluminum oxide plant and use method of device |
| CN110817915A (en) * | 2019-11-25 | 2020-02-21 | 沈阳铝镁设计研究院有限公司 | Method and device for reducing steam consumption in alumina production |
| CN111644117A (en) * | 2020-06-15 | 2020-09-11 | 惠安先锋机械有限公司 | Special material dissolving and extracting device for industrial design |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2008307020A1 (en) | 2009-04-09 |
| AU2008307020B2 (en) | 2011-10-20 |
| CN101398262A (en) | 2009-04-01 |
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