WO2020168722A1

WO2020168722A1 - Granular mineral dry sorting system based on solar energy and heat storage

Info

Publication number: WO2020168722A1
Application number: PCT/CN2019/109314
Authority: WO
Inventors: 饶中浩; 张轩; 贺靖峰; 段晨龙; 赵跃民
Original assignee: 中国矿业大学
Priority date: 2019-02-21
Filing date: 2019-09-30
Publication date: 2020-08-27
Also published as: CN109894286B; CN109894286A

Abstract

A granular mineral dry sorting system based on solar energy and heat storage, comprising a solar power supply and storage module, a solar photo-thermal module (18), a phase-change heat-storage heating module (3), and a granular mineral dry sorting module. The sorting system applies the solar photo-electric technology, the solar photo-thermal technology, the phase-change heat storage technology, and the heat-pipe phase-change heat transfer technology to the granular mineral dry sorting system, photovoltaic electric energy is stored by an energy storage device (34) to be supplied to an electric heating device (27), real-time dependence of power for the system on the solar energy is reduced. By using a solar photo-thermal and electric heating coupled phase-change material heating manner, large-area constant-temperature heating of a medium in an air duct (30) is achieved, heating is more uniform, and heat pipes (25) are arranged on the bin wall of a cyclone sorter (7), the heat exchange efficiency is high, rapid constant-temperature drying in a sorting bin is achieved, and the dewatering, drying and sorting efficiency are improved. The sorting system has the advantages of energy-saving and environmental protection, simple structure, long service life, high sorting efficiency, and stable and reliable operation.

Description

A dry separation system for granular minerals based on solar energy and heat storage

Technical field

The invention relates to the field of mineral sorting, in particular to a dry sorting system for granular minerals based on solar energy and heat storage.

Background technique

In order to achieve high-efficiency utilization of minerals, it is necessary to sort the original ores according to different purity to avoid the influence of inferior ores or by-products doping on the utilization rate of the mineral industry. The current mineral separation methods include dry and wet separation methods. Wet separation requires a large amount of water and is not suitable for separation applications in water-deficient and arid areas and sustainable ecological development. Therefore, how to improve dry separation The efficiency of the selection system has become a practical problem to be solved urgently.

Dry sorting usually has the following shortcomings or shortcomings: the blowing of hot air in the dry method requires a large amount of electric energy and heat to drive the fan in the system and heat the natural wind, which is extremely dependent on electric energy; at the same time, the blowing of hot air in the sorting bin is not The regular flow leads to uneven temperature distribution in the bin, which makes the degree of dehydration and drying of mineral raw materials in different regions different, and the inconsistent moisture content in the raw materials indirectly affects the separation efficiency.

Therefore, it is necessary to design a sorting system and method that is energy-efficient and efficient and can improve the temperature uniformity in the bin to overcome the above-mentioned practical shortcomings.

Summary of the invention

The purpose of the present invention is to provide a dry separation system for granular minerals based on solar energy and heat storage to overcome the problems of poor temperature uniformity and dependence on traditional electrical energy in the existing dry separation technology.

In order to achieve the above objective, the present invention adopts the following technical solutions: a dry separation system for particulate minerals based on solar energy and heat storage, including solar power storage modules, solar thermal modules, phase change heat storage heating modules, and particulate minerals Dry sorting module;

The solar power supply and storage module includes a solar photovoltaic system and an inverter, and the solar photovoltaic system is electrically connected to the input end of the inverter;

The phase change heat storage heating module includes an electric heating device and a phase change heat storage heating device. The electric heating device is in a cylindrical shape. A number of electric heating rods are uniformly spaced in the longitudinal direction of the electric heating device. The phase change heat storage heating device The device is in the shape of a circular column and is coaxially arranged outside the electric heating device. A number of heat exchange medium channels are arranged longitudinally and evenly in the phase change heat storage heating device. The phase change heat storage heating device is filled with phase change heat storage materials. The phase change temperature of the phase change heat storage material is 80-100°C, the annular cavity formed between the outer surface of the electric heating device and the inner wall surface of the phase change heat storage heating device is an air duct, and there are several evenly spaced distributions in the air duct Air duct support plate;

The particulate mineral drying and sorting module includes a feed bin, a cyclone separator, a primary fan, 1 ^# secondary fan, 2 ^# secondary fan, secondary air inlet box, tailings collection bin, concentrate collection bin, Dust collector and induced draft fan, the cyclone separator is cylindrical, the upper part of the cyclone separator is provided with a primary air inlet along the tangential direction of the cylinder wall, and the middle of the cylinder is provided with multiple secondary air inlets. Set inside the secondary air inlet box, the primary fan, 1 ^# secondary fan, and 2 ^# secondary fan are respectively connected to the air inlet of the air duct, and the outlet of the feed bin is connected to the air outlet of the air duct and the primary air In the pipeline between the inlets, the air outlets of the air duct are respectively connected with the two inlets of the primary air inlet and the secondary air inlet box. Heat pipes are evenly arranged in the wall of the cylinder, and the bottom of the cylinder is equipped with medium ore collection A tailings collection bucket is coaxially arranged outside the middle mine collection bucket. Both the middle mine collection bucket and the bottom of the tailing collection bucket are connected to the middle mine and tailings outlets. The middle mine and tailings outlets are connected to the tailings collection bin. The tailings collection bin is equipped with a medium ore channel, which is connected to the medium ore collecting bucket, the top of the cyclone separator is provided with a concentrate outlet, and the concentrate outlet is connected to the inlet of the dust collector, and the top of the dust collector is provided There is a tail gas outlet, the tail gas outlet is connected to the induced draft fan, and the bottom outlet of the dust collector is connected to the concentrate collection bin;

The output ends of the inverter are respectively electrically connected with a primary fan, a ^# 1 secondary fan, a ^# 2 secondary fan, and an electric heating rod, and the solar photothermal module is connected with the phase change heat storage heating module.

Further, the solar photovoltaic system includes a solar photovoltaic panel, a power storage device, a column and a base. The solar photovoltaic panel is obliquely and fixedly installed on the top of the column, the lower end of the column is fixed on the base, and the power storage device is fixed on the base. The solar photovoltaic panel is electrically connected with a power storage device, and the power storage device is electrically connected with the input end of the inverter.

Preferably, the power storage device includes a plurality of energy storage battery packs, and the energy storage battery pack is composed of a plurality of energy storage batteries arranged in the same direction.

Preferably, the energy storage battery is one of a lithium battery, a sodium battery, and a lead-acid battery.

Further, the solar thermal module includes a plurality of solar collectors, heat-absorbing medium flow tubes, a support frame and a bottom plate, the support frame includes a rectangular outer frame and a plurality of parallel support shafts arranged in the outer frame, two The sides are respectively fixed to the bottom plate, and the outer frame and the bottom plate are at a certain angle. Both sides of the outer frame are provided with a number of fixed through holes distributed evenly and symmetrically. The two ends of the heat medium flow pipe respectively pass through the other end of the connecting side plate and are arranged in parallel with the support shaft. The heat collection surface of the solar heat collection plate faces the heat absorption medium flow pipe, and the back of the solar heat collection plate is fixed on the support shaft Above, the heat absorption medium flow pipe is in communication with the heat exchange medium flow channel.

Preferably, the supporting shaft is a movable part, and the solar heat collecting plate rotates up and down with respect to the heat-absorbing medium flow tube with the supporting shaft as an axis.

Further, the pipelines between the primary fan, 1 ^# secondary fan, 2 ^# secondary fan and the air inlet of the air duct are respectively provided with flow meters; the air outlet of the air duct and the primary air inlet, The pipeline between the two inlets of the secondary air inlet box is respectively provided with pressure gauges.

Further, a feeder is also provided at the bottom outlet of the feed bin.

Preferably, the solar heat collecting plate is arc-shaped.

Further, the output terminal of the inverter is also connected to an AC power source.

The invention applies solar photovoltaic technology, solar thermal technology, phase change heat storage technology and heat pipe phase change heat transfer technology to the drying and sorting system of granular minerals, and uses energy storage devices to store photovoltaic electric energy to supply electric heating devices, Reduce the real-time dependence of the system's electricity consumption on solar energy, and adopt the method of solar light heating and electric heating coupled with phase change material heating to realize large-area constant temperature heating of the medium in the air duct, so that the heating is more uniform, and the cyclone separator warehouse wall is arranged The heat pipe has high heat exchange efficiency, realizes the rapid uniform temperature drying in the sorting bin, and improves the dehydration drying and sorting efficiency.

The invention has the advantages of energy saving and environmental protection, simple structure, long service life, high separation efficiency, stable and reliable operation. On the one hand, the dry separation system of particulate minerals based on solar energy and heat storage reduces dependence on traditional electrical energy by using solar energy. It promotes clean, environmental protection and sustainability driven by the system, which is of far-reaching significance for the realization of energy saving and emission reduction. On the other hand, the application of phase change heat storage and heat transfer technology ensures constant temperature heating by natural wind and realizes sorting The rapid uniform temperature dehydration and drying in the warehouse improves the sorting efficiency and has a broad market prospect.

Description of the drawings

Figure 1 is a schematic diagram of the dry separation system of particulate minerals based on solar energy and heat storage according to the present invention;

Figure 2 is a schematic diagram of the front structure of the solar photovoltaic system in Figure 1;

3 is a schematic diagram of the back structure of the solar photovoltaic system in FIG. 1;

4 is a schematic diagram of the front structure of the solar thermal module in FIG. 1;

Fig. 5 is a schematic diagram of the back structure of the solar thermal module in Fig. 1;

Figure 6 is a schematic diagram of the structure of the heat storage heating device in Figure 1;

Figure 7 is an internal cross-sectional view of Figure 6;

Figure 8 is a schematic diagram of the structure of the cyclone separator in Figure 1;

Figure 9 is a top view of Figure 8;

In the picture, 1-primary fan, 2-flow meter, 3-phase change heat storage heating module, 4-feed bin, 5-pressure gauge, 6-secondary air inlet box, 7-cyclone separator, 8 -China Mine Collection Bucket, 9- Tailings Collection Bin, 10-Medium Mine Channel, 11- Dust Collector, 12- Concentrate Collection Bin, 13- Induced Draft Fan, 14- Displacer, 15-1 ^# Secondary Fan, ^# 16-2 second fan, 17 solar photovoltaic system, solar

thermal module

18, 19 AC power supply, an inverter 20,

concentrate outlet

21, 22 the primary air inlet, secondary air inlet 23- , 24-Medium mine and tailings outlet, 25- heat pipe, 26- tailings collection bucket, 27- electric heating device, 28- heat exchange medium flow channel, 29- air channel support plate, 30- air channel, 31-phase Variable heat storage heating device, 32-phase change heat storage material, 33-solar photovoltaic panel, 34-electric storage device, 35-post, 36-base, 37-energy storage battery, 38-solar heat collector, 39-suction Heat medium flow pipe, 40-bottom plate, 41-outer frame, 42-support shaft, 43-pin shaft, 44-through hole, 45-connection side plate, 46-exhaust gas outlet.

detailed description

The present invention will be further described in detail below with reference to the drawings and specific embodiments.

As shown in Figure 1, a dry separation system for particulate minerals based on solar energy and heat storage of the present invention includes a solar power storage module, a solar thermal module 18, a phase change heat storage heating module 3, and a particulate mineral drying component. Select the module.

The solar power supply and storage module includes a solar photovoltaic system 17 and an inverter 20, as shown in FIGS. 2 and 3, the solar photovoltaic system 17 includes a solar photovoltaic panel 33, a power storage device 34, a column 35 and a base 36, The solar photovoltaic panel 33 is installed obliquely and fixedly on the top of the column 35, the lower end of the column 35 is fixed on the base 36, and the power storage device 34 is fixed on the base 36. The solar photovoltaic panel 33 is electrically connected to the power storage device 34. The electrical device 34 is electrically connected to the input end of the inverter 20. The electrical storage device 34 includes a plurality of energy storage battery packs. The energy storage battery pack is composed of a plurality of energy storage batteries 37 arranged in the same direction. The energy storage battery 37 is one of lithium batteries, sodium batteries, and lead-acid batteries, and the energy storage battery 37 realizes efficient storage and real-time conversion of photovoltaics.

As shown in Figures 4 and 5, the solar thermal module 18 includes a number of arc-shaped solar collector plates 38, a heat-absorbing medium flow tube 39, a support frame and a bottom plate 40, and the support frame includes a rectangular outer frame 41. And a number of parallel support shafts 42 arranged in the outer frame 41, the two sides of the bottom of the outer frame 41 are respectively fixed to the bottom plate 40 by pins 43, the outer frame 41 and the bottom plate 40 form a certain angle, and the two sides of the outer frame 41 are provided with a number of evenly symmetrical The two ends of the support shaft 42 respectively pass through a connecting side plate 45 and then are inserted into the through hole 44. The two ends of the heat absorption medium flow pipe 39 respectively pass through the other end of the connecting side plate 45 and then connect to the support The shaft 42 is arranged in parallel, the inner concave surface of the solar heat collecting plate 38 faces the heat-absorbing medium flow pipe 39, and the outer convex surface of the solar heat collecting plate 38 is fixed on the supporting shaft 42. The supporting shaft 42 is a movable part, and the solar heat collecting plate 38 rotates up and down relative to the heat-absorbing medium flow pipe 39 with the supporting shaft 42 as an axis. In this way, the angle of the solar heat collecting plate 38 can be adjusted appropriately according to the sunlight to maintain efficient heat collection .

As shown in Figures 6 and 7, the phase change heat storage heating module 3 includes an electric heating device 27 and a phase change heat storage heating device 31. The electric heating device 27 is cylindrical, and the inside of the electric heating device 27 is evenly spaced longitudinally. There are a number of electric heating rods. The phase change heat storage heating device 31 is in the shape of a circular column and is coaxially arranged outside the electric heating device 27. The phase change heat storage heating device 31 has a number of heat exchange medium flows uniformly spaced in the longitudinal direction. Road 28, the phase change heat storage heating device 31 is filled with a phase change heat storage material 32, the phase change temperature of the phase change heat storage material 32 is 80-100 DEG C, and the heat exchange medium transports solar heat to the phase change heat storage material 32 for storage. The phase change heat storage material 32 may be an organic phase change material, an inorganic phase change material, an organic composite phase change material, an inorganic composite phase change material, and a microcapsule phase change material. The selection of phase change materials takes the dehydration and drying temperature of coal as a reference, and aims to achieve constant temperature and continuous heating of natural wind to ensure a stable blast temperature. The annular cavity formed between the outer circular surface of the electric heating device 27 and the inner wall surface of the phase change heat storage heating device 31 is an air duct 30 in which a number of air duct support plates 29 are evenly distributed. The phase change heat storage heating module adopts the electric heating device 27 to couple the phase change heat storage heating device 31 to ensure the continuous heat storage of the phase change material under various lighting environments, and realizes the long-term constant temperature heating of natural wind. The energy supply method reduces energy consumption and is environmentally friendly.

The mineral particles comprising the dry sorting module 6, tailings collection bin to bin 4, the cyclone separator 7, a second fan ^# 1,1 15,2 ^# secondary blower fan 16, the secondary air into the windbox 9. Concentrate collection bin 12, dust collector 11 and induced draft fan 13, as shown in Figures 8 and 9, the cyclone separator 7 is cylindrical, and the upper part of the cyclonic separator 7 is tangent to the cylindrical wall The primary air inlet 22 is set in the direction, the middle part of the cylinder is provided with multiple secondary air inlets 23, and the middle part of the cylinder is arranged inside the secondary air inlet box 6, the primary fan 1, 1 ^# Secondary fan 15, 2 ^# Secondary fan 16 They are respectively connected to the air inlet of the air duct 30, the air outlet of the air duct 30 is respectively connected to the two inlets of the primary air inlet 22 and the secondary air inlet box 6, and the outlet of the feed bin 4 is connected to the air duct For the pipeline between the air outlet of 30 and the primary air inlet 22, heat pipes 25 are evenly arranged in the cylinder wall. The heat pipes 25 are not limited in structure and working fluid, and are arranged in the cylinder wall of the cyclone separator 7 The heat pipe 25 realizes the rapid uniform temperature of the space in the bin, thereby achieving synchronous dehydration and drying of the mineral raw materials, and improving the sorting efficiency. The bottom of the cylinder is provided with a medium ore collecting bucket 8. The medium ore collecting bucket 8 is coaxially provided with a tailings collecting bucket 26. The bottoms of the medium ore collecting bucket 8 and the tailings collecting bucket 26 are both connected to the medium ore and tailings outlet 24. , The middle mine and tailings outlet 24 is connected to the tailings collection bin 9. A middle mine channel 10 is provided in the tailings collection bin 9, and the middle mine channel 10 is connected to the middle mine collection bucket 8. The top of the cyclone separator 7 A concentrate outlet 21 is provided. The concentrate outlet 21 is connected to the inlet of the dust collector 11, the top of the dust collector 11 is provided with a tail gas outlet 46, the tail gas outlet 46 is connected to the induced draft fan 13, and the bottom outlet of the dust collector 11 is connected to the concentrate collection bin 12.

The output ends of the inverter 20 are respectively electrically connected to the primary fan 1, the 1 ^# secondary fan 15, the 2 ^# secondary fan 16, and the electric heating rod, and the heat absorption medium flow pipe 39 is connected to the heat exchange medium flow. Road 28 is connected.

In order to make the system control more accurate, the pipelines between the primary fan 1, 1 ^# secondary fan 15, 2 ^# secondary fan 16 and the air inlet of the air duct 30 are respectively provided with flow meters 2. The pipes between the air outlet of the air duct 30 and the two inlets of the primary air inlet 22 and the secondary air inlet box 6 are respectively provided with pressure gauges 5.

In order to make the system run stably and the mineral material can be continuously discharged, a feeder 14 is also provided at the bottom outlet of the feed bin 4.

In order to enable the system to continue to operate under long-term weak solar energy, the output end of the inverter 20 is also connected to an AC power source 19 to store part of the AC power source.

The solar photovoltaic panel 32 stores the absorbed sunlight energy in the power storage module 35 in the form of direct current, and then is processed by the inverter 20 to supply power to the fans. At the same time, part of the inverter current supplies the electricity in the phase change heat storage heating module 3 Heating rods, in addition, the system reserves part of the AC power supply to cope with long-term weak solar energy; the solar thermal module 18 uses a heat transfer medium to indirectly transfer solar thermal energy to the phase-change heat storage heating device 31 to heat the natural wind. The wind sends the mineral raw materials from the feeder 4 to the cyclone separator 7 along the tangential direction of the cylinder for separation. The heated secondary air enters the separation bin from the middle of the cyclone separator 7 to form an internal rotation The lighter-mass concentrate is entrained by the swirling flow to enter the concentrate outlet 21, and the heavier-mass mineral material slides down along the cylinder wall under the action of centrifugal force, during which the secondary air blows the lighter mineral material on the cylinder wall into the inside The swirling flow, combined with the swirling flow and the induced wind, partly rises into the concentrate outlet 21, enters the dust collector 11 for gas-solid separation, the separated concentrate is sent to the concentrate collection bin 12, and partly falls into the bottom middle ore collection Bucket 8, the mineral material left on the wall of the cylinder falls into the tail coal collecting bucket 27. In addition, the heat pipes 25 arranged in the cylinder wall of the cyclone separator 7 can quickly disperse the heat brought in by the hot air to all parts of the silo space, realize the uniform distribution of the space temperature and the simultaneous dehydration and drying of the coal, thereby avoiding the degree of dehydration. The sorting error caused by the difference improves the sorting efficiency.

The above-mentioned particle mineral separation system has high separation efficiency, long service life, energy saving and environmental protection, stable and reliable operation. The application of phase change material heat storage technology ensures that the blast temperature is at the optimal coal dehydration temperature, and the implantation of heat pipes ensures The uniform temperature distribution and dehydration degree in the sorting bin have a broad market prospect in the field of mineral material sorting.

Claims

A dry sorting system for granular minerals based on solar energy and heat storage, which is characterized in that it includes a solar power storage module, a solar thermal module (18), a phase change heat storage heating module (3), and a granular mineral dry sorting system. Module

The solar power supply and storage module includes a solar photovoltaic system (17) and an inverter (20), and the solar photovoltaic system is electrically connected to the input end of the inverter (20);

The phase change heat storage heating module (3) includes an electric heating device (27) and a phase change heat storage heating device (31), the electric heating device (27) is cylindrical, and the inside of the electric heating device (27) is uniform in longitudinal direction Several electric heating rods are arranged at intervals. The phase change heat storage heating device (31) is in the shape of a circular column and is coaxially arranged outside the electric heating device (27). The phase change heat storage heating device (31) is evenly spaced longitudinally A number of heat exchange medium flow channels (28) are provided, and the phase change heat storage heating device (31) is filled with a phase change heat storage material (32), and the phase change temperature of the phase change heat storage material (32) is 80-100°C , The annular cavity formed between the outer circular surface of the electric heating device (27) and the inner wall surface of the phase change heat storage heating device (31) is an air duct (30), and several winds are evenly spaced in the air duct (30) Road support plate (29);

The dried particulate mineral separation module comprises a feed bunker (4), cyclone separator (7), a fan (1), # 1 the second fan (15), a secondary blower # 2 (16), two The secondary air inlet box (6), the tailings collection bin (9), the concentrate collection bin (12), the dust collector (11) and the induced draft fan (13), the cyclone separator (7) is cylindrical , The upper part of the cyclone separator (7) is provided with a primary air inlet (22) along the tangential direction of the cylinder wall, a plurality of secondary air inlets (23) are arranged in the middle of the cylinder, and the middle part of the cylinder is arranged in the secondary air inlet box ( 6) Inside, the primary fan (1), 1 # secondary fan (15), and 2 # secondary fan (16) are respectively connected to the air inlet of the air duct (30), and the outlet of the air duct (30) The tuyere is respectively connected with the two inlets of the primary air inlet (22) and the secondary air inlet box (6), and the outlet of the feed silo (4) is connected to the outlet of the air duct (30) and the primary air inlet (22) Between the pipelines, heat pipes (25) are evenly arranged in the wall of the cylinder, the bottom of the cylinder is equipped with a medium ore collecting bucket (8), and the middle ore collecting bucket (8) is coaxially provided with tailings collecting The bottom of the hopper (26), the collecting hopper (8) and the tailings collecting hopper (26) are all connected to the middle ore and tailings outlet (24), and the middle ore and tailings outlet (24) is connected to the tailings collecting bin (9) , A medium ore channel (10) is provided in the tailings collection bin (9), the medium ore channel (10) is connected with the medium ore collecting bucket (8), and the top of the cyclone separator (7) is provided with a concentrate The outlet (21) and the concentrate outlet (21) are connected to the inlet of the dust collector (11), the top of the dust collector (11) is provided with a tail gas outlet (46), the tail gas outlet (46) is connected to the induced draft fan (13), and the dust collector (11) The bottom outlet is connected to the concentrate collection bin (12);

The output ends of the inverter (20) are respectively electrically connected with the primary fan (1), the 1 # secondary fan (15), the 2 # secondary fan (16), and the electric heating rod. The solar thermal module ( 18) Connect with the phase change heat storage heating module (3).
The dry separation system of particulate minerals based on solar energy and heat storage according to claim 1, wherein the solar photovoltaic system (17) comprises a solar photovoltaic panel (33), an electricity storage device (34), The column (35) and the base (36), the solar photovoltaic panel (33) is fixedly installed on the top of the column (35) obliquely, the lower end of the column (35) is fixed on the base (36), and the power storage device (34) is fixed on the base In (36), the solar photovoltaic panel (33) is electrically connected to the power storage device (34), and the power storage device (34) is electrically connected to the input end of the inverter (20).
The dry separation system of particulate minerals based on solar energy and heat storage according to claim 2, wherein the power storage device (34) comprises a plurality of energy storage battery packs, and the energy storage battery packs are composed of A plurality of energy storage batteries (37) are arranged in the same direction.
The dry separation system of particulate minerals based on solar energy and heat storage according to claim 3, wherein the energy storage battery (37) is one of a lithium battery, a sodium battery, and a lead-acid battery.
The dry separation system for particulate minerals based on solar energy and heat storage according to claim 1 or 2, characterized in that, the solar thermal module (18) includes a plurality of solar collectors (38), heat absorption A medium flow pipe (39), a support frame and a bottom plate (40). The support frame includes a rectangular outer frame (41) and a number of parallel support shafts (42) arranged in the outer frame (41). The bottom of the outer frame (41) has two The sides are respectively fixed to the bottom plate (40), the outer frame (41) and the bottom plate (40) are at a certain angle, a number of uniformly symmetrically distributed through holes (44) are provided on both sides of the outer frame (41), and both ends of the support shaft (42) After passing through a connecting side plate (45) and inserting into the through hole (44), the two ends of the heat absorption medium flow pipe (39) respectively pass through the other end of the connecting side plate (45) and then connect with the supporting shaft (42). ) Are arranged in parallel, the heat collecting surface of the solar heat collecting plate (38) faces the heat-absorbing medium flow pipe (39), the back of the solar heat collecting plate (38) is fixed on the supporting shaft (42), and the heat-absorbing medium The flow pipe (39) is in communication with the heat exchange medium flow passage (28).
The dry separation system of particulate minerals based on solar energy and heat storage according to claim 5, wherein the supporting shaft (42) is a movable part, and the solar heat collecting plate (38) is a supporting shaft (42) is that the shaft rotates up and down relative to the heat-absorbing medium flow pipe (39).
The dry separation system for particulate minerals based on solar energy and heat storage according to claim 1 or 2, characterized in that the primary fan (1), 1 # secondary fan (15), 2 # secondary The pipeline between the fan (16) and the air inlet of the air duct (30) is respectively provided with a flow meter (2); the air outlet of the air duct (30) and the primary air inlet (22), the secondary air The pipeline between the two inlets of the air inlet box (6) is respectively provided with a pressure gauge (5).
A dry sorting system for granular minerals based on solar energy and heat storage according to claim 1 or 2, characterized in that a feeder (14) is also provided at the bottom outlet of the feed bin (4).
The dry sorting system for particulate minerals based on solar energy and heat storage according to claim 1 or 2, characterized in that the solar collector plate (38) is arc-shaped.
The dry sorting system for particulate minerals based on solar energy and heat storage according to claim 1 or 2, characterized in that the output end of the inverter (20) is also connected to an AC power source (19).