Recovery of cobalt chloride and hydrochloric acid

Abstract

The utility model provides a kind of cobalt chloride and hydrochloric acid recovery device, the first import of pretreatment component is connected with the first export of raw material tank, and its first export is connected with raw material tank;The first import of membrane component is connected with the second export of pretreatment component;The first import of heat recovery component is connected with the first export of membrane component;The first import of evaporator is connected with the first export of heat recovery component, its first export is connected with the second import of heat recovery component, and its second export is connected with the third import of heat recovery component;The first import of cooling crystallizer is connected with the second export of heat recovery component;The first import of solid-liquid separator is connected with the first export of cooling crystallizer, and its first export is connected with the second import of cooling crystallizer.The utility model is concentrated after adopting pretreatment, nanofiltration membrane separation, reverse osmosis membrane component, removes hydrochloric acid, concentrates cobalt chloride, solution enters evaporation concentration, and then after cooling crystallization, high-purity cobalt chloride is obtained.

Description

Technical Field

[0001] This utility model relates to the field of cobalt chloride recovery technology, specifically to a cobalt chloride and hydrochloric acid recovery device, especially a device for recovering cobalt chloride and hydrochloric acid in the new energy battery or battery recycling industry, particularly a high-purity, energy-saving recovery device for cobalt chloride and hydrochloric acid in a cobalt chloride-hydrochloric acid system solution, which is particularly suitable for mixed solutions containing cobalt chloride and hydrochloric acid obtained by hydrochloric acid leaching and hydrochloric acid back-extraction. Background Technology

[0002] Hydrochloric acid leaching, as an important hydrometallurgical technique for battery recycling, exhibits significant advantages in metal recovery efficiency and selective leaching due to its unique chemical properties. However, it also faces challenges such as environmental management and equipment corrosion. Leaching efficiency is the most prominent advantage of the hydrochloric acid process. Hydrochloric acid, with its strong acidity and chloride ion complexing ability, demonstrates excellent dissolution performance for valuable metals in lithium-ion battery cathode materials. Lithium cobalt oxide (LiCoO2) is a prime example. 2) For example, using 4 mol / L hydrochloric acid at 80°C, the cobalt leaching rate can reach 99% within 1 hour, while under the same conditions, the sulfuric acid system, even with the addition of H2O2 as a reducing agent, requires 2 hours to achieve a 95% leaching rate. Selective leaching capability is another significant advantage of the hydrochloric acid system. By precisely controlling the hydrochloric acid concentration and temperature, stepwise leaching of different metals can be achieved, which is particularly important when processing complex battery materials. Overall, the hydrochloric acid leaching process is particularly suitable for the recovery of high-value-added cobalt materials, especially in scenarios where the product is positioned in chloride or metallic form.

[0003] However, the hydrochloric acid system has some inherent drawbacks that limit its development. In terms of equipment materials, the cobalt chloride solution contains excess hydrogen chloride, which requires stringent material selection, such as titanium, Hastelloy, and graphite. Hydrogen chloride gas in the evaporation and crystallization system causes a large temperature rise in the compressor, resulting in high energy consumption. The generated hydrogen chloride condensate has a low concentration and is difficult to discharge; if it is neutralized before discharge, it produces waste salt that is difficult to utilize. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a device for recovering cobalt chloride and hydrochloric acid.

[0005] The present invention provides a cobalt chloride and hydrochloric acid recovery device, comprising:

[0006] Raw material tank;

[0007] A pretreatment component, the first inlet of which is connected to the first outlet of the raw material tank, and the first outlet of which is connected to the raw material tank, is used to retain macromolecular substances;

[0008] A membrane module, with its first inlet connected to the second outlet of the pretreatment module, is used to separate and concentrate cobalt chloride and hydrochloric acid;

[0009] A heat recovery component, the first inlet of which is connected to the first outlet of the membrane component;

[0010] An evaporator, the first inlet of which is connected to the first outlet of the heat recovery component, the first outlet of which is connected to the second inlet of the heat recovery component, and the second outlet of which is connected to the third inlet of the heat recovery component;

[0011] The heat recovery component can recover the heat of the evaporating condensate and the evaporating feed liquid of the evaporator, and use it to heat the evaporating feed liquid entering the evaporator.

[0012] A cooling crystallizer, whose first inlet is connected to the second outlet of the heat recovery assembly, is used for the crystallization of cobalt chloride;

[0013] A solid-liquid separator, whose first inlet is connected to the first outlet of the cooling crystallizer and whose first outlet is connected to the second inlet of the cooling crystallizer, is used to separate cobalt chloride crystals.

[0014] Preferably, the membrane module includes:

[0015] A nanofiltration module, the first inlet of which is connected to the first inlet of the membrane module, is used to separate cobalt chloride and hydrochloric acid;

[0016] A cobalt chloride reverse osmosis module, wherein its first inlet is connected to the first outlet of the nanofiltration module, its first outlet is connected to the first outlet of the membrane module, and its second outlet is connected to the second inlet of the nanofiltration module;

[0017] The hydrochloric acid reverse osmosis component has its first inlet connected to the second outlet of the nanofiltration component.

[0018] Preferably, the recycling device further includes:

[0019] The recycled water storage tank has its first inlet connected to the third outlet of the cobalt chloride reverse osmosis module and the second outlet of the heat recovery module, and its second inlet connected to the first outlet of the hydrochloric acid reverse osmosis module.

[0020] A hydrochloric acid storage tank, the first inlet of which is connected to the second outlet of the hydrochloric acid reverse osmosis component;

[0021] The pure water membrane module has its first inlet connected to the first outlet of the recycled water storage tank.

[0022] Preferably, the recycling device further includes: a dryer;

[0023] The dryer is connected to the second outlet of the solid-liquid separator and is used to dry the cobalt chloride crystals output from the solid-liquid separator.

[0024] Preferably, the cooling crystallizer is equipped with a stirrer for stirring the solution inside the cooling crystallizer.

[0025] Preferably, the pretreatment component is any one or more of the following combinations: sand filter, multi-media filter, security filter, activated carbon, precision filter, and ultrafiltration membrane module.

[0026] Preferably, the heat recovery component is an indirect heat exchange plate heat exchanger or a tubular heat exchanger.

[0027] Preferably, the evaporator is an MVR evaporator.

[0028] Preferably, the pure water membrane module is a reverse osmosis membrane module.

[0029] Preferably, the dryer is a vibrating fluidized bed dryer.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. In this utility model, after pretreatment, nanofiltration membrane separation, and concentration by reverse osmosis membrane module, hydrochloric acid is removed, cobalt chloride is concentrated, the solution enters evaporation and concentration, and then is cooled and crystallized to obtain high-purity cobalt chloride. At the same time, hydrochloric acid is separated before entering the evaporation and concentration, which not only ensures that the material entering the subsequent crystallization unit is free of free hydrochloric acid, reducing the equipment material specifications and the energy consumption of subsequent evaporation, but also allows it to be reused in the upstream back-extraction or leaching unit, saving wastewater treatment costs.

[0032] 2. The device of this utility model also includes a condensate-to-pure water membrane module to recover pure water for use in upstream devices. Attached Figure Description

[0033] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0034] Figure 1 This is a schematic diagram of a cobalt chloride and hydrochloric acid recovery device.

[0035] The diagram shows:

[0036] Raw material tank 1, cooling crystallizer 6

[0037] Pretreatment component 2, stirrer 7

[0038] Membrane module 3 Solids separator 8

[0039] Nanofiltration module 31, Dryer 9

[0040] Cobalt chloride reverse osmosis module 32, recycled water storage tank 10

[0041] Hydrochloric acid reverse osmosis module 33 Hydrochloric acid storage tank 11

[0042] Heat recovery module 4, pure water membrane module 12

[0043] Evaporator 5 Detailed Implementation

[0044] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0045] Example 1

[0046] like Figure 1 As shown, this embodiment provides a cobalt chloride and hydrochloric acid recovery device, including: a raw material tank 1, a pretreatment component 2, a membrane component 3, a heat recovery component 4, an evaporator 5, a cooling crystallizer 6, and a solid-liquid separator 8.

[0047] The first inlet of the pretreatment component 2 is connected to the first outlet of the raw material tank 1, and its first outlet is also connected to the raw material tank 1, for retaining macromolecular substances; the first inlet of the membrane component 3 is connected to the second outlet of the pretreatment component 2, for separating and concentrating cobalt chloride and hydrochloric acid; the first inlet of the heat recovery component 4 is connected to the first outlet of the membrane component 3; the first inlet of the evaporator 5 is connected to the first outlet of the heat recovery component 4, its first outlet is connected to the second inlet of the heat recovery component 4, and its second outlet is connected to the third inlet of the heat recovery component 4; the heat recovery component 4 can recover the heat of the evaporating condensate and the evaporating feed liquid of the evaporator 5, for heating the evaporating feed liquid entering the evaporator 5; the first inlet of the cooling crystallizer 6 is connected to the second outlet of the heat recovery component 4, for crystallizing cobalt chloride; the first inlet of the solid-liquid separator 8 is connected to the first outlet of the cooling crystallizer 6, and its first outlet is connected to the second inlet of the cooling crystallizer 6, for separating cobalt chloride crystals.

[0048] Pretreatment component 2 is any one or more of the following combinations: sand filter, multi-media filter, security filter, activated carbon, precision filter, ultrafiltration membrane module. Heat recovery component 4 is an indirect heat exchange plate heat exchanger or tubular heat exchanger. Evaporator 5 is an MVR evaporator. Pure water membrane module 12 is a reverse osmosis membrane module.

[0049] The recovery device also includes: a dryer 9; the dryer 9 is connected to the second outlet of the solid-liquid separator 8 and is used to dry the cobalt chloride crystals output from the solid-liquid separator 8. A stirrer 7 is installed on the cooling crystallizer 6 to stir the solution inside the cooling crystallizer 6. The dryer 9 is a vibrating fluidized bed dryer.

[0050] The membrane module 3 includes a nanofiltration module 31, a cobalt chloride reverse osmosis module 32, and a hydrochloric acid reverse osmosis module 33. The first inlet of the nanofiltration module 31 is connected to the first inlet of the membrane module 3 for separating cobalt chloride and hydrochloric acid; the first inlet of the cobalt chloride reverse osmosis module 32 is connected to the first outlet of the nanofiltration module 31, its first outlet is connected to the first outlet of the membrane module 3, and its second outlet is connected to the second inlet of the nanofiltration module 31; the first inlet of the hydrochloric acid reverse osmosis module 33 is connected to the second outlet of the nanofiltration module 31.

[0051] The recycling device also includes: a recycled water storage tank 10, a hydrochloric acid storage tank 11, and a pure water membrane module 12. The first inlet of the recycled water storage tank 10 is connected to the third outlet of the cobalt chloride reverse osmosis module 32 and the second outlet of the heat recovery module 4, and its second inlet is connected to the first outlet of the hydrochloric acid reverse osmosis module 33; the first inlet of the hydrochloric acid storage tank 11 is connected to the second outlet of the hydrochloric acid reverse osmosis module 33; and the first inlet of the pure water membrane module 12 is connected to the first outlet of the recycled water storage tank 10.

[0052] Example 2

[0053] Those skilled in the art can understand this embodiment as a more specific description of Embodiment 1.

[0054] This embodiment provides a high-purity, energy-saving recovery device for cobalt chloride and hydrochloric acid in a cobalt chloride-hydrochloric acid system solution, comprising:

[0055] Raw material tank 1 stores raw materials and materials returned from downstream, and is equipped with liquid level detection and temperature detection.

[0056] Pretreatment component 2, three-stage filtration: sand filter (for suspended solids), multi-media filter, security filter, activated carbon (for adsorbing organic matter), precision filter (for removing particles), and one or more combinations of ultrafiltration membrane modules. Used to remove particulate matter, colloids, organic matter, inorganic scale, microorganisms, etc.

[0057] Membrane module 3 includes a combination of nanofiltration module, cobalt chloride reverse osmosis module, hydrochloric acid reverse osmosis module, etc. The nanofiltration module is used to separate cobalt chloride and hydrochloric acid, the cobalt chloride reverse osmosis module is used to concentrate cobalt chloride, and the hydrochloric acid reverse osmosis module is used to concentrate hydrochloric acid.

[0058] The nanofiltration unit includes: a high-pressure pump, a nanofiltration membrane module, a cleaning device, a storage and collection device, and a control system. The control system monitors operating parameters including: transmembrane pressure (TMP), membrane flux, conductivity, pH, and temperature. Extractant residue adsorbed on the membrane surface causes a decrease in flux, initiating the cleaning process; an automatic cleaning program is triggered when the flux decreases to 70% of its initial value or the TMP increases by 50%. The high-pressure pump provides a transmembrane pressure of 0.5 MPa to 3 MPa.

[0059] The solution to be nanofiltration is transported to the inlet of the high-pressure pump via pipeline. The outlet of the high-pressure pump is connected to the inlet of the nanofiltration membrane module via a pressure-resistant pipeline, providing sufficient pressure to force the liquid through the nanofiltration membrane. The product water outlet of the nanofiltration membrane module is connected to the storage and collection device. The cleaning device is connected to the inlet, product water outlet, and concentrate outlet of the nanofiltration membrane module via branch pipes, forming an independent cleaning loop. The control system monitors parameters at each stage using various sensors and connects to the high-pressure pump, cleaning pump, valves, and other equipment via controllers to achieve automatic adjustment.

[0060] The nanofiltration unit can be a single-stage or two-stage nanofiltration system. When the Co concentration of the feedstock is too high and the Co recovery rate of the first-stage nanofiltration is below 95%, the second-stage nanofiltration is activated to ensure the Co recovery rate. Conversely, if the first-stage nanofiltration can meet the Co recovery rate requirements, the second-stage nanofiltration is not activated. The concentrate produced by the nanofiltration unit is an enriched cobalt chloride solution, which enters the downstream reverse osmosis unit for further concentration or is directly used for evaporation and concentration.

[0061] Nanofiltration membranes are special separation membranes suitable for strongly acidic environments (such as pH=0 to 2), and can be made of materials such as polysulfonamide composites, sulfonated polyethersulfone, polysulfone, and inorganic ceramics.

[0062] The cobalt chloride reverse osmosis module includes: a high-pressure pump, reverse osmosis membrane modules, a cleaning device, a storage and collection device, a control system, and an energy recovery system. The control system monitors operating parameters including transmembrane pressure (TMP), membrane flux, conductivity, pH, temperature, and concentrate reflux ratio. The control system integrates pressure, flow, and conductivity sensors to achieve fully automated operation and fault diagnosis. An automatic cleaning program is triggered when the flux decreases to 70% of its initial value or the TMP increases by 50%. The cobalt chloride concentration ratio is 2–3 times. The resulting concentrated cobalt chloride solution enters the evaporation and concentration module, and the permeate enters the recycled water storage tank. The high-pressure pump provides a transmembrane pressure of 3 MPa–6 MPa.

[0063] The solution to be reverse osmosis enters the inlet of the high-pressure pump. The outlet of the high-pressure pump can be connected to the high-pressure inlet of the energy recovery system via a pressure-resistant pipe. The high-pressure outlet of the energy recovery system is connected to the inlet of the reverse osmosis membrane module. The permeate outlet of the membrane module is connected to the storage and collection device. The concentrate outlet of the membrane module can be connected to the low-pressure inlet of the energy recovery system to recover residual pressure in the concentrate. The cleaning device can be connected to the inlet, permeate, and concentrate outlets of the membrane module via branch pipes to form an independent loop. The control system can monitor the parameters of each node through various sensors and connect to the high-pressure pump, energy recovery device, valves, cleaning pump, etc., through a controller to achieve automatic adjustment.

[0064] Reverse osmosis components are special separation membranes suitable for strongly acidic environments (such as pH = 0-2). Materials that can be selected include polysulfonamide composites, surface-coated piperazine amides or propylene-alkyl polyamides, and inorganic ceramics.

[0065] The heat recovery component 4 includes an indirect heat exchanger, which is in the form of a plate or tube, and can recover the heat from the condensate of the evaporator and the heat from the feed liquid for heating the feed liquid entering the evaporator.

[0066] Evaporator 5, preferably an MVR evaporator, with an evaporation temperature of 75℃~85℃ and a concentration endpoint of 1.4g / cm³. 3 ~1.6g / cm 3 The corresponding CoCl2 concentration is 54–55%. In terms of equipment configuration, a falling film evaporator (first stage) → forced circulation evaporator (second stage) is used to achieve efficient heat transfer.

[0067] Cooling crystallizer 6, density reaches 1.5 g / cm³ 3 Pump water into the crystallization vessel and maintain the temperature above 85℃ (to prevent premature crystallization). The cooling process consists of three stages: natural cooling, controlled cooling, and constant temperature stabilization. Natural cooling starts from the initial temperature to 70℃-80℃. Controlled cooling uses circulating cooling water to reduce the temperature from 70℃-80℃ to 32℃. The cooling rate should be 7℃ / h-10℃ / h.

[0068] Stirrer 7 adjusts its speed according to the crystallization stage, such as high speed for mixing in the initial stage and low speed for protecting the crystals in the growth stage.

[0069] For solid separator 8, the selection should take into account both corrosion resistance and separation efficiency. PTFE or ceramic lining can be selected, and a variable frequency speed control motor should be used, which can not only save energy but also adjust the speed according to the particle size, thereby adjusting the separation factor.

[0070] Dryer 9, optionally a vibrating fluidized bed dryer, where wet materials are fluidized under the drive of a vibrating motor. Hot air (60℃~150℃) penetrates the bed for efficient heat transfer, and the moisture content after evaporation is ≤0.5%. The parts in contact with the material are lined with SUS316L stainless steel and PTFE. The inlet air temperature is adjustable from 60℃ to 150℃ to prevent CoCl3 decomposition.

[0071] Reclaimed water storage tank 10 is used to store evaporation condensate and permeate from the reverse osmosis unit's concentrated cobalt chloride solution.

[0072] Hydrochloric acid storage tank 11 is used to store hydrochloric acid separated by nanofiltration.

[0073] Pure water membrane module 12 is a reverse osmosis membrane module. The evaporation condensate and the permeate from the concentrated cobalt chloride in the reverse osmosis module contain trace amounts of chloride ions and Co ions. After passing through this module, it can be made into compliant reusable pure water.

[0074] The pure water membrane module 12 includes a multi-media filter, activated carbon adsorption, heavy metal pretreatment, precision filtration, a high-pressure pump, a reverse osmosis membrane, a cleaning device, a storage and collection system, a control system, and an energy recovery system. The control system monitors operating parameters including transmembrane pressure (TMP), membrane flux, conductivity, pH, temperature, and concentrate reflux ratio. The control system integrates pressure, flow, and conductivity sensors to achieve fully automated operation and fault diagnosis. The generated concentrate enters the feed tank for reuse. The reverse osmosis membrane can be made of sulfonated polyamide modified membrane or polyester chlorine-resistant membrane material. The high-pressure pump provides a transmembrane pressure of 1.5 MPa to 3.5 MPa.

[0075] In this embodiment, after pretreatment, nanofiltration membrane separation, and concentration using a reverse osmosis membrane module, hydrochloric acid is removed, cobalt chloride is concentrated, and the solution enters evaporation concentration, followed by cooling crystallization to obtain high-purity cobalt chloride. Simultaneously, hydrochloric acid is separated before evaporation concentration, ensuring that the material entering the subsequent crystallization unit is free of free hydrochloric acid, reducing the requirements for equipment specifications and the energy consumption of subsequent evaporation. Furthermore, the hydrochloric acid can be recycled to upstream back-extraction or leaching units, saving wastewater treatment costs. The apparatus in this embodiment also includes a condensate-to-pure water membrane module to recover pure water for use in upstream units.

[0076] The apparatus of this embodiment is suitable for a mixed solution containing cobalt chloride and hydrochloric acid obtained by hydrochloric acid leaching and hydrochloric acid back-extraction. This cobalt chloride solution contains 0.5 mol / L to 2 mol / L (pH≈1 to 2) of hydrochloric acid.

[0077] In this invention, after pretreatment, nanofiltration membrane separation, and concentration by reverse osmosis membrane module, hydrochloric acid is removed, cobalt chloride is concentrated, the solution is then concentrated by evaporation, and finally cooled and crystallized to obtain high-purity cobalt chloride.

[0078] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0079] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A device for recovering cobalt chloride and hydrochloric acid, characterized in that, include: Raw material tank (1); The pretreatment component (2) has its first inlet connected to the first outlet of the raw material tank (1) and its first outlet connected to the raw material tank (1) for retaining macromolecular substances; The membrane module (3), whose first inlet is connected to the second outlet of the pretreatment module (2), is used to separate and concentrate cobalt chloride and hydrochloric acid; The heat recovery component (4) has its first inlet connected to the first outlet of the membrane component (3); Evaporator (5), whose first inlet is connected to the first outlet of the heat recovery component (4), whose first outlet is connected to the second inlet of the heat recovery component (4), and whose second outlet is connected to the third inlet of the heat recovery component (4); The heat recovery component (4) can recover the heat of the evaporating condensate and the evaporating feed liquid of the evaporator (5) and use it to heat the evaporating feed liquid entering the evaporator (5). The cooling crystallizer (6) has its first inlet connected to the second outlet of the heat recovery assembly (4) for the crystallization of cobalt chloride; The solid-liquid separator (8) has its first inlet connected to the first outlet of the cooling crystallizer (6) and its first outlet connected to the second inlet of the cooling crystallizer (6), and is used to separate cobalt chloride crystals.

2. The cobalt chloride and hydrochloric acid recovery device according to claim 1, characterized in that, The membrane module (3) includes: Nanofiltration module (31), whose first inlet is connected to the first inlet of the membrane module (3), is used to separate cobalt chloride and hydrochloric acid; The cobalt chloride reverse osmosis module (32) has its first inlet connected to the first outlet of the nanofiltration module (31), its first outlet connected to the first outlet of the membrane module (3), and its second outlet connected to the second inlet of the nanofiltration module (31). The first inlet of the hydrochloric acid reverse osmosis unit (33) is connected to the second outlet of the nanofiltration unit (31).

3. The cobalt chloride and hydrochloric acid recovery device according to claim 2, characterized in that, The recycling device also includes: The first inlet of the recycled water storage tank (10) is connected to the third outlet of the cobalt chloride reverse osmosis module (32) and the second outlet of the heat recovery module (4), and the second inlet of the tank is connected to the first outlet of the hydrochloric acid reverse osmosis module (33). A hydrochloric acid storage tank (11) has its first inlet connected to the second outlet of the hydrochloric acid reverse osmosis assembly (33); The pure water membrane module (12) has its first inlet connected to the first outlet of the recycled water storage tank (10).

4. The cobalt chloride and hydrochloric acid recovery device according to claim 1, characterized in that, The recycling device also includes: a dryer (9); The dryer (9) is connected to the second outlet of the solid-liquid separator (8) for drying the cobalt chloride crystals output by the solid-liquid separator (8).

5. The cobalt chloride and hydrochloric acid recovery device according to claim 1, characterized in that, The cooling crystallizer (6) is equipped with a stirrer (7), which is used to stir the solution inside the cooling crystallizer (6).

6. The cobalt chloride and hydrochloric acid recovery apparatus according to claim 1, characterized in that, The pretreatment component (2) is any one or more of the following combinations: sand filter, multi-media filter, security filter, activated carbon, precision filter, ultrafiltration membrane module.

7. The cobalt chloride and hydrochloric acid recovery apparatus according to claim 1, characterized in that, The heat recovery component (4) is an indirect heat exchange plate heat exchanger or a tubular heat exchanger.

8. The cobalt chloride and hydrochloric acid recovery apparatus according to claim 1, characterized in that, The evaporator (5) is an MVR evaporator.

9. The cobalt chloride and hydrochloric acid recovery apparatus according to claim 3, characterized in that, The pure water membrane module (12) is a reverse osmosis membrane module.

10. The cobalt chloride and hydrochloric acid recovery apparatus according to claim 4, characterized in that, The dryer (9) is a vibrating fluidized bed dryer.

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