CN209522591U - A kind of device preparing high-purity magnesium oxide - Google Patents

Abstract

The utility model discloses a kind of devices for preparing high-purity magnesium oxide, ammonia steaming device including soda manufacture system, nanofiltration device, calciner plant and carbonizing plant, it further include that purification device is set after nanofiltration device and ammonia steaming device, micro-filtration is set after calciner plant, purification device and micro-filtration are commonly connected to static mixer, successive reaction pyrolysis installation is set gradually after static mixer, filtration wash unit, it is divided into two-way after filtration wash unit, enrichment facility is connected all the way, it is sent into soda ash ammonia steaming device after ammonium chloride mother liquor is concentrated and carries out ammonia still process reuse, pure water returns to filtration wash unit；Another way magnesium carbonate solid obtains magnesium oxide product and carbon dioxide gas after the processing of drying and calcining device, and carbon dioxide is delivered to soda carbonization device by pipeline.The design of the utility model successive reaction pyrolysis installation is carried out continuously reaction, and good product quality, stability are high；Washing water consumption can also be saved.

Description

A kind of device preparing high-purity magnesium oxide

Technical field

The utility model relates to the preparation facilities of magnesia more particularly to a kind of preparation facilities of high-purity magnesium oxide.

Background technique

High-purity magnesium oxide is that a kind of mass fraction of magnesia is higher than 98% magnesia, widely used, such as in rubber and plastic height Polymers field is mainly used as activator, vulcanizing agent, stabilizer etc.；In precise polished field, it is mainly used as optical glass, electronics Element, polishing of electrode material etc.；In field of medicaments, mainly for the manufacture of the drug for neutralizing gastric acid.

The raw material of production magnesia can be divided into liquid mine and two kinds of solid mineral, and liquid mine is with seawater, subsurface brine, salt Based on lake bittern water, high-purity magnesium oxide is produced as raw material using halogen (sea) water and is had a clear superiority, first is that it is resourceful, second is that because in liquid It is reacted in phase, impurity is easily removed by the methods of chemical refining and washing, product purity is guaranteed, third is that simple process, It is not required to the techniques such as the molten and complicated purifying of acid.There are two types of the basic principles that magnesia is produced using halogen (sea) water as raw material: carbonization is heavy Magnesium, calcining carbonic acid magnesium processes and alkaline process magnesium sinking, calcining hydroxide magnesium processes, two kinds of principle production processes can all generate ammonium chloride mother liquor, Excessive thermal energy is consumed since mother liquid concentration is low in ammonia still process reuse process, economy relative mistake.In addition, to improve magnesia Purity needs to be arranged magnesium carbonate and magnesium hydroxide wash mill, to reduce the influence of the impurity such as chloride ion, but washs water consumption Greatly, the economy of process unit is influenced.

Patent CN104743582B discloses the method and apparatus that a kind of utilization mentions bromine brine production refined brine, will be through Cross it is pretreated mention bromine brine pressurization be sent into nanofiltration device, by nanofiltration obtain calcium and magnesium sulfate ion concentration nanofiltration dope and The purification brine of sodium chloride purity is high, nanofiltration dope can be used for producing other bittern chemical products including magnesium chloride, potassium sulfate, Brine is refined after further treatment afterwards for soda ash, caustic soda or the production of other salt & chemical industries.The nanofiltration of patent production refines halogen Water ammonia-soda process soda manufacture provides quality raw materials.

Summary of the invention

The technical problem to be solved by the present invention is to provide a kind of devices for preparing high-purity magnesium oxide, realize magnesia The efficient combination of production and soda manufacture also has good environmental benefit while reducing the consumption of magnesia production process.

In order to solve the above technical problems, the utility model includes the ammonia steaming device of soda manufacture system, nanofiltration device, calcining Device and carbonizing plant are structurally characterized in that purification device is arranged in nanofiltration device and ammonia steaming device later, set after calciner plant Micro-filtration is set, purification device and micro-filtration are commonly connected to static mixer, set gradually after static mixer continuous Pyrolysis installation, filtration wash unit are reacted, is divided into two-way after filtration wash unit, enrichment facility is connected all the way, by ammonium chloride Concentrate after mother liquor concentrations is sent into soda ash ammonia steaming device and carries out ammonia still process reuse, and pure water returns to filtration wash unit；Another way carbon Sour magnesium solid obtains magnesium oxide product and carbon dioxide gas after the processing of drying and calcining device, and carbon dioxide is conveyed by pipeline To soda carbonization device.

The successive reaction pyrolysis installation is high length-diameter ratio, the container with multilayer stirring.High length-diameter ratio can be improved instead The heat transfer efficiency of process is answered, multilayer stirring is uniformly mixed reaction pyrolysis, produces high quality of products.

Preferably, reaction pyrolysis container draw ratio is greater than 2, the stirring number of plies and is more than or equal to the gold of 3, bottom charging top discharge Belong to container, partition with holes is equipped between every layer of stirring, aperture is not less than 6mm, and container material quality includes stainless steel, enamel, titanium.

The filtration wash unit includes band filter, diaphragm filter press, disk filter, and filtering accuracy is not less than 20 μm。

Preferably, when filtration washing needs to be carried out continuously, band filter is selected, guarantees also save while washing effect About wash water consumption；When free ammonia content is greater than 20ppm in filtrated stock, selection uses the filters pressing of closed delivery diaphragm, can effectively keep away Exempt from free ammonia spilling, reduces environmental pollution.

The enrichment facility includes distillation device, positive permeability apparatus, reverse osmosis unit.

Preferably, distillation device can make full use of the heat of filtrated stock, while reaching concentration purpose, generate light Water is used for filtration washing.

Utility model works process:

Purification device is set after soda ash nanofiltration device, cleans to material, ammonia steaming device is also connected with before purification device, Cleanser needed for providing purification, purification device connect static mixer later, and another way original is also set up before static mixer Expect feedway, i.e., micro-filtration is set after calciner plant, removes suspended particulate impurity, connect static mixer later.

Two kinds of materials are uniformly mixed by static mixer, connect successive reaction pyrolysis installation, successive reaction pyrolysis dress later It sets and is designed by special construction, keep material local mixing uniform, while achieving the effect that successive reaction pyrolysis, improve heat Utilization rate.

Filtration wash unit is connected after successive reaction pyrolysis installation, will react solidliquid mixture that pyrolysis installation generates into Row is separated by solid-liquid separation, and is washed to solid phase, connects drying and calcining device and enrichment facility later, respectively to solid phase and liquid phase into Row drying and calcining and concentration, drying and calcining device are the providing device of final solids product, connect carbonizing plant later, will The gaseous by-products of generation are recycled.

Enrichment facility obtains pure water after filtration wash unit while liquid phase is concentrated, pure water returns Filtration wash unit is used as washing water, and the dosage of washing water can be effectively reduced, achieve the purpose that cost efficiency.Enrichment facility it After connect ammonia steaming device, to dope carry out ammonia still process reuse, processing dope it is lower compared to the energy consumption of light liquid, operating cost is lower.

The major advantage of the utility model is raw material both from soda manufacture process, and intermediate material processing relies on soda ash raw Production system, the effective use soda manufacture advantage of scale realize cost efficiency.The design of successive reaction pyrolysis installation keeps production continuous It carries out, good product quality, stability are high；Different filtration washing forms can be selected in filtration wash unit, reaches washing effect Washing water consumption is saved simultaneously；By increasing the unique design of enrichment facility, continuous production is on the one hand realized, is on the other hand led to It crosses and concentration is carried out to filtrated stock, the energy consumption of mother liquid disposal process can be reduced, while generating fresh water for washing process, section Water consumption is about washed, the ammonium chloride mother liquor after concentration is sent directly into soda ash ammonia steaming device, reduces steam consumption, reaches energy conservation and subtract The purpose of row；The carbon dioxide generated after calcining is sent directly into soda carbonization device, reduces carbon emission amount, and environmental benefit is significant.

Detailed description of the invention

Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing:

The concrete technology flow process figure of Fig. 1 the utility model；

Fig. 2 is ammonia-soda process soda manufacture outline flowchart.

Specific embodiment

Embodiment 1

Referring to Fig.1, which includes nanofiltration dope purification device, calcining condensate liquid micro-filtration dress It sets, static mixer, successive reaction pyrolysis installation, filtration wash unit, drying and calcining device, mother liquor concentrations device and soda ash Production system partial devices, wherein soda manufacture components of system as directed device includes ammonia steaming device, calciner plant, nanofiltration device and carbonization Device.

Purification device is set after soda ash nanofiltration device, cleans to material, ammonia steaming device is also connected with before purification device, Cleanser needed for providing purification, purification device connect SK type static mixer later, also set up before static mixer another Micro-filtration is set after road raw material feed device, i.e. soda ash calciner plant, removes suspended particulate impurity, connection later is static mixed Clutch.

Two kinds of materials are uniformly mixed by static mixer, connect successive reaction pyrolysis installation, successive reaction pyrolysis dress later The enamel reaction still for being set to draw ratio 2.5, stirring the number of plies 3, is designed by structure, keeps material local mixing uniform, is connected reaching While continuous reaction pyrolysis effect, the utilization efficiency of heat is improved.

Belt filter press is connected after successive reaction pyrolysis kettle, filtering accuracy is 20 μm, is generated to reaction pyrolysis installation Solidliquid mixture is separated by solid-liquid separation, and is washed to solid phase, and portion of washing water comes from subsequent positive permeability apparatus, belt type filter Drying and calcining device and enrichment facility are connected after machine, and calcining and concentration are dried to solid phase and liquid phase respectively, it is dry Calciner plant is the providing device of final solids product, connects carbonizing plant later, the gaseous by-products of generation are recycled It utilizes.

Positive permeability apparatus is arranged after band filter, and pure water, pure water are obtained while liquid phase is concentrated It returns to band filter and is used as washing water, the dosage of washing water can be effectively reduced, achieve the purpose that cost efficiency.Positive infiltration dress Ammonia steaming device is connected after setting, and ammonia still process reuse is carried out to dope, processing dope is lower compared to the energy consumption of light liquid, and operating cost is more It is low.

Embodiment 2

Embodiment 2 is substantially the same manner as Example 1, and the configuration and material that the main distinction is successive reaction pyrolysis installation are not Together, reaction pyrolysis installation is draw ratio 3, the 316L material reaction pyrolysis kettle for stirring the number of plies 4, bigger draw ratio and is more stirred Mixing the number of plies makes reaction be heated more evenly, and temperature is easier to control, while the reaction pyrolysis kettle heat transfer coefficient of 316L material is more excellent.

Filtration wash unit uses diaphragm filter press, and compared to band filter, the water content of obtained solid product is lower, It is calcined in the identical situation of impurity concentration, impurity content is lower.

Enrichment facility uses distillation device, can make full use of the heat of filtrated stock, while reaching concentration purpose, It generates fresh water and is used for filtration washing.

Claims (5)

1. a kind of device for preparing high-purity magnesium oxide, ammonia steaming device, nanofiltration device, calciner plant including soda manufacture system and Carbonizing plant, it is characterised in that purification device is set after nanofiltration device and ammonia steaming device, micro-filtration is set after calciner plant and is filled It sets, purification device and micro-filtration are commonly connected to static mixer, and successive reaction pyrolysis is set gradually after static mixer Device, filtration wash unit, filtration wash unit are divided into two-way later, connect enrichment facility all the way, ammonium chloride mother liquor is concentrated Concentrate afterwards is sent into soda ash ammonia steaming device and carries out ammonia still process reuse, and pure water returns to filtration wash unit；Another way magnesium carbonate solid High-purity magnesium oxide product and carbon dioxide gas are obtained after the processing of drying and calcining device, carbon dioxide is delivered to pure by pipeline Alkali carbonizing plant.

2. the device according to claim 1 for preparing high-purity magnesium oxide, it is characterised in that the successive reaction is pyrolyzed dress It is set to high length-diameter ratio, the container with multilayer stirring.

3. the device according to claim 1 for preparing high-purity magnesium oxide, it is characterised in that the successive reaction is pyrolyzed dress It is set to the container that draw ratio is more than or equal to the charging top discharge of 3, bottom greater than 2, the stirring number of plies, is equipped between every layer of stirring with holes Partition, aperture be not less than 6mm.

4. the device according to claim 1 for preparing high-purity magnesium oxide, it is characterised in that the filtration wash unit includes Band filter, diaphragm filter press, disk filter, filtering accuracy are not less than 20 μm.

5. the device according to claim 1 for preparing high-purity magnesium oxide, which is characterized in that the enrichment facility includes film Distilling apparatus, positive permeability apparatus, reverse osmosis unit.