Cobalt hydroxide flash drying equipment

Abstract

The utility model discloses cobalt hydroxide flash drying equipment which comprises a heat collector, a circulating pump, an oil-air heat exchanger, a first hot air duct, a hot air furnace, a fan, an oil storage tank, a combustor, a flash drying tower and a second hot air duct, the heat collector, the circulating pump and a first cavity in the oil-air heat exchanger are connected in series to form a circulating loop, an air inlet is formed in the hot blast stove, the first hot air duct is communicated with the air inlet, a second cavity of the oil-air heat exchanger is located in the first hot air duct, and the fan is used for blowing hot air in the first hot air duct into the hot blast stove. The oil storage tank, the combustor and the hot-blast stove are sequentially connected in series, the combustor is used for igniting fuel oil entering the hot-blast stove, and the flash drying tower is communicated with an air outlet of the hot-blast stove through a second hot air duct. The cobalt hydroxide flash drying equipment provided by the utility model has the advantages of high photo-thermal utilization efficiency, low drying cost of cobalt hydroxide and high efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical equipment technical field, concretely relates to a cobalt hydroxide flash drying equipment. BACKGROUND

[0002] Magnesium oxide cobalt precipitation process is the main process of crude cobalt hydroxide at present, and the process flow is: impurity removal-one stage cobalt precipitation-two stage cobalt precipitation-filtration washing-flash drying-high grade crude cobalt hydroxide product.At present, in the flash drying process, hot blast furnace is usually used to provide heat for flash drying, and the fuel of hot blast furnace is diesel or natural gas and other fossil fuels, which is neither economical nor environmentally friendly.If the project is located in an area rich in solar energy resources, solar light and heat can be collected and used for flash drying process, which will produce significant economic and environmental benefits.But in the light and heat technology, the energy source is solar energy, and when there is no continuous light, the whole system cannot be used, which affects the process production. SUMMARY

[0003] The utility model aims at solving one of the technical problems in the related art at least to some extent.

[0004] Therefore, the embodiment of the utility model provides a cobalt hydroxide flash drying equipment, which has the advantages of high light and heat utilization efficiency, low drying cost of cobalt hydroxide and high efficiency.

[0005] The cobalt hydroxide flash drying equipment provided by the embodiment of the utility model comprises a heat collector, a circulating pump, an oil-air heat exchanger, a first hot air duct, a hot blast furnace, a fan, an oil storage tank, a burner, a flash drying tower and a second hot air duct, the heat collector, the first cavity in the circulating pump and the oil-air heat exchanger are connected in series and form a circulating loop, an air inlet is arranged on the hot blast furnace, the first hot air duct is communicated with the air inlet, the second cavity of the oil-air heat exchanger is located in the first hot air duct, and the fan is used for blowing hot air in the first hot air duct into the hot blast furnace, the oil storage tank, the burner and the hot blast furnace are connected in series, the burner is used for igniting fuel oil entering the hot blast furnace, and the flash drying tower is communicated with the air outlet of the hot blast furnace through the second hot air duct.

[0006] The embodiment of the utility model discloses a cobalt hydroxide flash drying equipment, through the first chamber of heat collector, circulating pump and oil - air heat exchanger are connected in series and form a circulation loop, under the sunlight radiation, heat collector can heat inside heat - conducting oil, the heat - conducting oil of heating is driven to the first chamber in oil - air heat exchanger under the drive of circulating pump, to heat - exchange with the air in the second chamber, the hot air of heating in the second chamber enters hot blast stove by first hot blast flue under the blowing of fan, and finally by hot blast stove enters the drying tower of flash and realizes the drying processing of cobalt hydroxide. When the hot air temperature in the hot blast stove does not satisfy the drying demand of cobalt hydroxide, the burner can be started, the burner transports the fuel oil in the oil storage tank to the hot blast stove and ignites to realize the heating of hot air, guarantee the hot air in the drying tower of flash in the set temperature range. Thus, solar energy is effectively utilized, the light energy utilization rate is improved, the drying cost of cobalt hydroxide is reduced, and the drying efficiency of cobalt hydroxide is also ensured.

[0007] In some embodiments, the cobalt hydroxide flash drying equipment further comprises:

[0008] A first switch valve is installed on the circulation loop;

[0009] A second switch valve and a heat - conducting oil expansion tank are connected in series and are connected in parallel with the first switch valve;

[0010] A nitrogen tank is communicated with the heat - conducting oil expansion tank.

[0011] In some embodiments, the cobalt hydroxide flash drying equipment further comprises:

[0012] An oil-salt heat exchanger, a first chamber of the oil-salt heat exchanger is connected in parallel with the heat collector;

[0013] A cold salt tank and a hot salt tank are connected in series.

[0014] In some embodiments, the air inlet has two and is symmetrically arranged on the two sides of the hot blast stove;

[0015] The first hot blast flue comprises a first flue and two second flues, the second chamber of the oil-air heat exchanger is located in the first flue, the first end of the first flue is communicated with the first end of the two second flues, the second end of the two second flues is communicated with the two air inlets respectively, the circumferential wall of the second flue is provided with an access hole, and the second flue is provided with a blocking plate capable of blocking the access hole.

[0016] In some embodiments, at least two oil-air heat exchangers are connected in series on the circulation loop, each of the oil-air heat exchangers is connected with a parallel branch pipe, and a third switch valve is installed on each of the parallel branch pipes.

[0017] Each of the oil-air heat exchangers corresponds to a group of hot blast stoves and flash drying towers.

[0018] In some embodiments, a parabolic trough mirror or a linear Fresnel mirror is arranged beside the collector.

[0019] The collector comprises a plurality of groups of parallel vacuum heat collecting tubes, each group of the vacuum heat collecting tubes comprises a plurality of vacuum heat collecting tubes connected in series.

[0020] In some embodiments, a first temperature sensor is installed on the circulation loop.

[0021] And / or, a second temperature sensor is arranged on the first hot air duct.

[0022] And / or, a third temperature sensor is arranged on the second hot air duct.

[0023] In some embodiments, an adjusting valve is arranged on the second hot air duct.

[0024] In some embodiments, a flow meter and / or a filter are further connected in series on the circulation loop.

[0025] In some embodiments, the cobalt hydroxide flash drying device further comprises a transfer mechanism, and the collector is installed on the transfer mechanism so as to have a protected position and an open position. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a schematic view of a cobalt hydroxide flash drying device according to an embodiment of the present application.

[0027] Figure 2 FIG. 2 is a schematic view of a circulation loop in a cobalt hydroxide flash drying device according to an embodiment of the present application.

[0028] Figure 3 FIG. 3 is another schematic view of a circulation loop in a cobalt hydroxide flash drying device according to an embodiment of the present application.

[0029] Figure 4 FIG. 4 is a schematic view of a connection between an oil-air heat exchanger and a hot blast stove in a cobalt hydroxide flash drying device according to an embodiment of the present application.

[0030] REFERENCE NUMERALS:

[0031] 1, collector; 2, circulating pump; 3, oil-air heat exchanger; 4, first hot air duct; 401, first air duct; 402, second air duct; 403, blocking plate; 5, hot blast stove; 6, fan; 7, oil storage tank; 8, burner; 9, flash drying tower; 10, second hot air duct; 11, first switch valve; 12, second switch valve; 13, heat conducting oil expansion tank; 14, nitrogen tank; 15, oil-salt heat exchanger; 16, flow meter; 17, filter; 18, bypass pipeline; 19, third switch valve. DETAILED DESCRIPTION

[0032] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0033] The present application is described below in conjunction with Figures 1-4 The cobalt hydroxide flash drying equipment according to the embodiments of the present application is described below.

[0034] The cobalt hydroxide flash drying equipment according to the embodiments of the present application includes a collector 1, a circulating pump 2, an oil-air heat exchanger 3, a first hot air duct 4, a hot blast stove 5, a fan 6, an oil storage tank 7, a burner 8, a flash drying tower 9 and a second hot air duct 10. The collector 1, the circulating pump 2 and a first chamber in the oil-air heat exchanger 3 are connected in series and form a circulating loop. The hot blast stove 5 is provided with an air inlet, the first hot air duct 4 is in communication with the air inlet, a second chamber of the oil-air heat exchanger 3 is located in the first hot air duct 4, and the fan 6 is used to blow the hot air in the first hot air duct 4 into the hot blast stove 5. The oil storage tank 7, the burner 8 and the hot blast stove 5 are connected in series, the burner 8 is used to ignite the fuel oil entering the hot blast stove 5, and the flash drying tower 9 is in communication with an air outlet of the hot blast stove 5 through the second hot air duct 10.

[0035] According to the cobalt hydroxide flash drying equipment, the heat collector 1, the circulating pump 2 and the first chamber in the oil-air heat exchanger 3 are connected in series and form a circulating loop, under the sunlight radiation, the heat collector 1 can heat the internal heat conduction oil, the heat conduction oil after heating is driven to the first chamber in the oil-air heat exchanger 3 under the driving of the circulating pump 2, so as to exchange heat with the air in the second chamber, the hot air heated in the second chamber enters the hot blast furnace 5 from the first hot blast duct 4 under the blowing of the fan 6, and finally enters the flash drying tower 9 from the hot blast furnace 5 to realize the drying treatment of the cobalt hydroxide. When the temperature of the hot air in the hot blast furnace 5 does not meet the drying requirement of the cobalt hydroxide, the burner 8 can be started, the burner 8 delivers the fuel oil in the oil storage tank 7 to the hot blast furnace 5 and ignites to heat the hot air, so that the hot air entering the flash drying tower 9 finally is ensured to be in the set temperature range. Therefore, the solar energy is effectively utilized, the light energy utilization rate is improved, the drying cost of the cobalt hydroxide is reduced, and the drying efficiency of the cobalt hydroxide is also ensured.

[0036] It should be noted that, as shown in Figure 1 , a filter 17 is also installed on the circulating loop to filter the heat conduction oil and ensure smooth flow of the heat conduction oil in the circulating loop. The heat conduction oil can be biphenyl-biphenyl ether (mixed by biphenyl and biphenyl ether in a ratio of 26.5% and 73.5%), or silicone heat conduction oil or other types of heat conduction oil. The temperature of the heat conduction oil is not more than 400 DEG C.

[0037] In addition, the oil-air heat exchanger 3 is a finned tube type, the heat conduction oil flows in the tube, and the air flows outside the finned tube. The number and arrangement of the tubes in the oil-air heat exchanger 3 can be designed according to the actual working condition, and the purpose is to realize heat exchange between the heat conduction oil and the air. The temperature of the air after heat exchange with the heat conduction oil is not more than 350 DEG C.

[0038] In some embodiments, as shown in Figure 2 and Figure 3 , the cobalt hydroxide flash drying equipment further comprises a first switch valve 11, a second switch valve 12, a heat conduction oil expansion tank 13 and a nitrogen tank 14. The first switch valve 11 is installed on the circulating loop, the second switch valve 12 and the heat conduction oil expansion tank are connected in series and are connected in parallel with the first switch valve 11. The nitrogen tank 14 communicates with the heat conduction oil expansion tank 13.

[0039] Before the circulating loop is operated, the first switch valve 11 is closed, the second switch valve 12 is opened, the heat conduction oil is injected into the heat conduction oil expansion tank 13 through the main oil pump, and then the heat conduction oil expansion tank 13 fills the entire circulating loop. The nitrogen tank 14 is used to provide pressure for the heat conduction oil expansion tank 13, so that the internal pressure is higher than the vapor pressure of the heat conduction oil at the corresponding temperature, so as to prevent the heat conduction oil from vaporizing. When the circulating loop is operated, the first switch valve 11 is opened, and the second switch valve 12 is closed.

[0040] Specifically, the second switch valve 12 has two and is located on both sides of the heat transfer oil expansion tank 13 to reliably block the heat transfer oil in the circulating loop and the heat transfer oil in the heat transfer oil expansion tank 13.

[0041] In some embodiments, as shown in FIG. 1, the heat transfer oil circulating system further comprises a heat transfer oil expansion tank 13, a circulating pump 2, an oil-air heat exchanger 3, and a hot air furnace 5. Figure 3 As shown in FIG. 1, the cobalt hydroxide flash drying device further comprises an oil-salt heat exchanger 15, a cold salt tank, and a hot salt tank, and the first chamber of the oil-salt heat exchanger 15 is connected in parallel with the heat collector 1. The cold salt tank, the second chamber of the oil-salt heat exchanger 15, and the hot salt tank are connected in series.

[0042] That is, when the light intensity is high and the high temperature setting value of the heat transfer oil in the circulating loop, the heat transfer oil can exchange heat with the molten salt through the oil-salt heat exchanger 15 to transfer the heat of the heat transfer oil to the molten salt, so that the cold salt in the cold salt tank increases in temperature when passing through the second chamber of the oil-salt heat exchanger 15 and enters the hot salt tank for storage. At this time, when the heat transfer oil in the circulating loop is low and does not meet the use requirement, the hot salt in the hot salt tank can be transported to the cold salt tank, and the heat can be transferred to the heat transfer oil when passing through the second chamber of the oil-salt heat exchanger 15 to complete the heating of the heat transfer oil. This setting further improves the utilization rate of light heat and further reduces the drying cost of cobalt hydroxide.

[0043] In some embodiments, as shown in FIG. 1, the heat transfer oil circulating system further comprises a heat transfer oil expansion tank 13, a circulating pump 2, an oil-air heat exchanger 3, and a hot air furnace 5. Figure 4 As shown in FIG. 1, the heat transfer oil circulating system further comprises a heat transfer oil expansion tank 13, a circulating pump 2, an oil-air heat exchanger 3, and a hot air furnace 5. The air inlet has two and is symmetrically arranged on both sides of the hot air furnace 5. The first hot air duct 4 comprises a first air duct 401 and two second air ducts 402. The second chamber of the oil-air heat exchanger 3 is located in the first air duct 401. The first end of the first air duct 401 is in communication with the first ends of the two second air ducts 402. The second ends of the two second air ducts 402 are respectively in communication with the two air inlets. The second air duct 402 is provided with an access hole on the peripheral wall. The second air duct 402 is provided with a blocking plate 403 capable of blocking the access hole.

[0044] That is, the hot air duct is divided into two through the two second air ducts 402 to enter the hot air furnace 5 at the same time, which ensures that the hot air diffuses faster in the hot air furnace 5, and the real-time temperature detection in the hot air furnace 5 is accurate. By setting the access hole, the access hole can be exposed by opening the blocking plate 403, so that personnel can enter the hot air furnace 5 through the access hole to complete the maintenance work of the hot air furnace 5.

[0045] Specifically, the two access holes are adjacent to the hot air furnace 5. When the circulating loop is running, the high-temperature heat transfer oil (380℃) in the circulating loop enters the oil-air heat exchanger 3, exchanges heat with the air in the oil-air heat exchanger 3, and is cooled to 280℃. The air is sent into the second chamber of the oil-air heat exchanger 3 by the circulating pump 2, and then enters the two second air ducts 402 through the first air duct 401, and finally enters the hot air furnace 5 through the two second air ducts 402.

[0046] In some embodiments, at least two oil-air heat exchangers 3 are connected in series on the circulating loop, each of the oil-air heat exchangers 3 is connected with a bypass pipeline 18 in parallel, and a third switch valve 19 is installed on each of the bypass pipelines 18; each of the oil-air heat exchangers 3 corresponds to a group of hot blast stoves 5 and flash drying towers 9.

[0047] That is, the heat energy converted by the collector 1 through solar radiation can be exchanged with air through at least two oil-air heat exchangers 3, so that the heated air is input into different hot blast stoves 5 through at least two first hot blast ducts 4, and then enters different flash drying towers 9 through the different hot blast stoves 5, thereby effectively improving the drying efficiency of cobalt hydroxide. In addition, when the temperature of the heat conducting oil in the circulating loop is too low to supply all the flash drying towers 9 at the same time, part of the third switch valve 19 can be opened to prevent the heat conducting oil from exchanging heat with air in part of the oil-air heat exchangers 3.

[0048] Specifically, the oil-air heat exchangers 3 and the flash drying towers 9 are provided with two groups, and by controlling the on-off of the third switch valve 19, the photothermal system formed by the circulating loop can supply heat to two oil-air heat exchangers 3 at the same time, or only supply heat to one of the oil-air heat exchangers 3.

[0049] In the related art, two sets of flash drying systems are used for production, and the annual production of cobalt hydroxide is 5000 tons of cobalt metal. Each flash drying main machine can produce 2315 kg of dry basis cobalt hydroxide per hour, and the hot blast stoves 5 provide hot air and heat by burning diesel oil. Each flash drying main machine is configured with a hot blast stove 5, the main tower air inlet temperature is 300-350℃, the output heat of the hot blast stove is 2.8 million kcal, which is equivalent to a thermal power of 3.3 MW, and the heating power required for the production of two sets of flash drying systems at the same time is 6.6 MW. The total heat required for the annual production of 5000 tons of cobalt hydroxide is 66765 GJ.

[0050] In some embodiments, a parabolic trough mirror or a linear Fresnel mirror is arranged beside the collector 1. The collector 1 includes multiple groups of parallel vacuum heat collecting tubes, and each group of vacuum heat collecting tubes includes multiple vacuum heat collecting tubes connected in series.

[0051] The mirror can converge sunlight so that the sunlight can irradiate the vacuum heat collecting tubes at a higher light intensity, thereby realizing rapid heating of the heat conducting oil in the vacuum heat collecting tubes and improving the photothermal utilization rate of the photothermal system.

[0052] Specifically, the collector 1 is composed of several standard loops, each of which is composed of 4 collector assemblies (SCA), and each SCA is composed of 12 standard collector elements (SCE). Each basic collector element is about 12 m long, with an opening width of 5.8 m, and contains a spatial torque frame steel structure support and a vacuum collector tube. The basic collector element is provided with a parabolic reflector, which is arranged in 4 columns on the collector element, and the vacuum collector tube is installed on the steel structure support by metal support every 4 meters.

[0053] Without considering the heat storage system, the collector 1 is arranged with 3 loops, and the low-temperature heat-conducting oil at 280℃ enters the collector 1 through the circulating loop, and is heated to 380℃ after flowing through the 4 SCAs, and then is sent to the oil-air heat exchanger 3 through the circulating pump 2. The heat-conducting oil pipeline used in the circulating loop uses a 20# carbon steel pipeline. The 3-loop collector 1 can provide about 30000 GJ of heat per year, and about 2600 t of cobalt hydroxide can be produced by using the heat to fold the cobalt metal, and 50% of diesel oil can be replaced.

[0054] If the heat storage system is configured, the collector 1 is arranged with 7 loops, and the total light energy can provide heat of 67000 GJ, and about 5000 t of cobalt hydroxide can be produced by using the heat to fold the cobalt metal, and all diesel oil can be replaced.

[0055] In some embodiments, a first temperature sensor is installed on the circulating loop. And / or, a second temperature sensor is arranged on the first hot air duct 4. And / or, a third temperature sensor is arranged on the second hot air duct 10.

[0056] The first temperature sensor is used to detect the temperature of the heat-conducting oil in the circulating loop, and the circulating pump 2 can adjust the flow of the heat-conducting oil in the circulating loop according to the detected temperature, and the specific flow is detected through the flow meter 16 connected in series on the circulating loop, so as to ensure that the temperature of the heat-conducting oil entering the first chamber of the oil-air heat exchanger 3 reaches the set temperature before the flow reaches the bottom. The second temperature sensor is used to detect the temperature of the hot air in the first hot air duct 4, and whether the detected temperature meets the standard can be used as the standard for whether the burner 8 is enabled. The third temperature sensor can detect the temperature of the hot air in the second hot air duct 10, and the temperature here is interlocked with the burner 8. The burner 8 can automatically adjust the size of the flame according to the temperature, such as using a large fire to quickly warm up when starting, and automatically switching to a small fire after the air temperature is stable, so as to keep the hot air temperature stable.

[0057] It should be noted that, as Figure 1As shown, the oil tank 7 is provided with a liquid level gauge, which is interlocked with the oil pump frequency converter, so as to control the oil level of the oil tank 7 to be kept in a set range. The valve opening degree of the burner 8 is interlocked with the oil delivery amount, so as to realize the safety protection of the burner 8, and the burner 8 valve should be closed when the flow is too small. The second hot air duct 10 is provided with an adjusting valve, and the flash drying tower 9 temperature is interlocked with the adjusting valve, so as to control the temperature in the flash drying tower 9 to be kept in a set range through the adjusting valve. The fan 6 is interlocked with the second temperature sensor, so as to control the air temperature in the first hot air duct 4 to be kept in a set range through controlling the frequency of the fan 6. In order to avoid the heat conducting oil solidification caused by long time non-use, the heat conducting oil expansion tank 13 is provided with an electric heating assembly, and when the oil temperature is too low, the electric heating assembly is started and circulates the whole system at the minimum flow rate.

[0058] In some embodiments, the cobalt hydroxide flash drying device further comprises a transfer mechanism, and the heat collector 1 is installed on the transfer mechanism so that the heat collector 1 has a protected position and an open position.

[0059] Therefore, when it is dark in the evening without sunlight or the wind speed is too high, the total control system sends a signal to the local controller of the heat collector 1 to start the return protection mode, and after the heat collector 1 is moved to the protected position through the transfer mechanism, the circulating pump is stopped, so as to effectively avoid damage to the heat collector 1 caused by too high wind speed.

[0060] It should be noted that a wind speed meter can also be installed on the heat collector 1 to measure the wind speed.

[0061] The cobalt hydroxide flash drying method according to the embodiment of the present application comprises the following steps:

[0062] The heat collector 1 is irradiated by the sun to heat the heat conducting oil in the circulating loop, and the circulating pump 2 works to heat the heat conducting oil in the circulating loop through the oil-air heat exchanger 3 and the air in the first hot air duct 4;

[0063] The fan 6 is started to blow the heated air in the first hot air duct 4 into the hot blast stove 5, and the temperature of the air entering the hot blast stove 5 is adjusted by controlling the wind power;

[0064] The hot air in the hot blast stove 5 enters the flash drying tower 9 through the second hot air duct 10 to perform drying operation;

[0065] The temperature of the hot air in the second hot air duct 10 is detected, if the minimum set temperature is reached, the burner 8 is not started, and the temperature is controlled within the set temperature range through the fan 6, if the minimum set temperature is not reached, the burner 8 is started, the fuel oil entering the hot blast stove 5 from the oil tank 7 is ignited, and the hot air in the second hot air duct 10 is adjusted to the set temperature range.

[0066] The technical advantages of the cobalt hydroxide flash drying method according to the embodiments of the present application are the same as the technical advantages of the cobalt hydroxide flash drying equipment in the above embodiments, and will not be repeated here.

[0067] In some embodiments, before starting the fan 6 to blow the heated air in the first hot air duct 4 into the hot blast stove 5 and adjusting the temperature of the air entering the hot blast stove 5 by controlling the wind power, it further comprises:

[0068] The circulating pump 2 adjusts the flow according to the temperature of the heat conducting oil in the circulating loop, so that the heat conducting oil in the circulating loop can reach the set temperature range;

[0069] When the temperature of the heat conducting oil in the circulating loop reaches the maximum set temperature, the heat conducting oil exchanges heat with the molten salt through the oil-salt heat exchanger 15 to store heat in the hot salt tank.

[0070] Therefore, in the case of sufficient light and heat energy, the excess heat can be stored by the molten salt to improve the utilization rate of light and heat.

[0071] Specifically, in the heat storage stage, the heat conducting oil heats the molten salt, and the molten salt stores excess heat; in the heat release stage, the molten salt heats the heat conducting oil to release the stored heat; the molten salt does not exchange heat with the air directly, which reduces the complexity of the heat exchange system.

[0072] In some embodiments, before the collector 1 is subjected to solar radiation to heat the heat conducting oil in the circulating loop, and the circulating pump 2 works to make the heat conducting oil in the circulating loop exchange heat with the air in the first hot air duct 4 through the oil-air heat exchanger 3, it further comprises:

[0073] Detecting the temperature of the cooling oil in the circulating loop, if the temperature does not reach the minimum set temperature, the molten salt in the hot salt tank exchanges heat with the heat conducting oil in the circulating loop through the oil-salt heat exchanger 15, so that the temperature of the heat conducting oil reaches the minimum set temperature.

[0074] By releasing heat from the molten salt, the heat conducting oil can be heated to ensure that the heat conducting oil in the circulating loop can heat the air to the set temperature through the oil-air heat exchanger 3, so that the effect of flash drying of cobalt hydroxide can be achieved without burning fuel oil.

[0075] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0076] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0077] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0078] In the utility model, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0079] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that the specific feature, structure, material or characteristic being described with reference to the embodiment or example is included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the features of different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0080] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the changes, modifications, replacements and modifications of the above embodiments made by the person skilled in the art are within the protection scope of the present application.

Claims

1. A cobalt hydroxide flash drying apparatus, characterized by, The cobalt hydroxide flash drying device comprises: a heat collector, a circulating pump and an oil-air heat exchanger, a first chamber in the heat collector, the circulating pump and the oil-air heat exchanger is in series and forms a circulating loop; a first hot air duct, a hot air furnace and a fan, the hot air furnace is provided with an air inlet, the first hot air duct is communicated with the air inlet, a second chamber of the oil-air heat exchanger is located in the first hot air duct, and the fan is used for blowing hot air in the first hot air duct into the hot air furnace; an oil storage tank and a burner, the oil storage tank, the burner and the hot air furnace are sequentially connected in series, and the burner is used for igniting fuel oil entering the hot air furnace; a flash drying tower and a second hot air duct, the flash drying tower is communicated with an air outlet of the hot air furnace through the second hot air duct.

2. The cobalt hydroxide flash dry equipment of claim 1, wherein, The cobalt hydroxide flash drying device further comprises: a first switch valve installed on the circulating loop; a second switch valve and a heat conducting oil expansion tank, the second switch valve and the heat conducting oil expansion tank are connected in series and are connected in parallel with the first switch valve; a nitrogen tank communicated with the heat conducting oil expansion tank.

3. The cobalt hydroxide flash dry equipment of claim 1, wherein, The cobalt hydroxide flash drying device further comprises: an oil-salt heat exchanger, a first chamber of the oil-salt heat exchanger is connected in parallel with the heat collector; a cold salt tank and a hot salt tank, the cold salt tank, a second chamber of the oil-salt heat exchanger and the hot salt tank are sequentially connected in series.

4. The cobalt hydroxide flash dry apparatus of claim 1, wherein, The air inlet is provided with two air inlets and is symmetrically arranged on both sides of the hot air furnace; The first hot air duct comprises a first air duct and two second air ducts, the second chamber of the oil-air heat exchanger is located in the first air duct, the first end of the first air duct is communicated with the first end of the two second air ducts, the second end of the two second air ducts is respectively communicated with the two air inlets, the peripheral wall of the second air duct is provided with an access hole, and the second air duct is provided with a blocking plate capable of blocking the access hole.

5. The cobalt hydroxide flash dry apparatus of claim 1, wherein, At least two oil-air heat exchangers are connected in series on the circulating loop, each oil-air heat exchanger is connected in parallel with a branch pipeline, and a third switch valve is installed on each branch pipeline. Each oil-air heat exchanger corresponds to a group of hot air furnaces and flash drying towers.

6. The cobalt hydroxide flash dry apparatus of claim 1, wherein, A parabolic trough mirror or a linear Fresnel mirror is arranged beside the heat collector; The heat collector comprises a plurality of groups of parallel vacuum heat collecting tubes, and each group of vacuum heat collecting tubes comprises a plurality of series-connected vacuum heat collecting tubes.

7. The cobalt hydroxide flash drying apparatus according to any one of claims 1 to 6, wherein A first temperature sensor is installed on the circulating loop; And / or, a second temperature sensor is arranged on the first hot air duct; And / or, a third temperature sensor is arranged on the second hot air duct.

8. The cobalt hydroxide flash dry apparatus of claim 7, wherein, An adjusting valve is arranged on the second hot air duct.

9. The cobalt hydroxide flash dry apparatus of claim 1, wherein, A flow meter and / or a filter are further connected in series on the circulating loop.

10. The cobalt hydroxide flash dry apparatus of claim 1, wherein, The cobalt hydroxide flash drying device further comprises a transfer mechanism, and the heat collector is installed on the transfer mechanism so as to have a protected position and an open position.

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