Evaporation device and method for wastewater of in-situ leaching uranium mining evaporation pond under extreme conditions

Abstract

The invention discloses a device and method for evaporating wastewater of an in-situ leaching uranium mining evaporation pond under extreme conditions, and relates to the technical field of in-situ leaching uranium mining wastewater treatment.The device comprises a plurality of plastic-coated steel wire ropes, evaporation materials are hung on each plastic-coated steel wire rope, the plastic-coated steel wire ropes are evenly fixed to the evaporation pond, and the evaporation materials are arranged in the evaporation pond; the bottom of the evaporation material enters the wastewater in the evaporation tank; a photo-thermal qualitative change material is attached to the bottom of the evaporation pond, the side wall of the evaporation pond and the evaporation material; surfactants are attached to the interior of the evaporation pond and the evaporation material. And a fluxing agent is dissolved in the evaporation pond. According to the method, an evaporation material is selected, the wastewater treatment capacity of the in-situ leaching uranium mining mine is improved, a photo-thermal qualitative change material and a wind-thermal qualitative change material are adopted, light energy and wind energy in the environment are fully utilized, meanwhile, a surfactant is adopted, the siphon rate of the rapid evaporation material to wastewater is increased, and the water content is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of in-situ leaching uranium wastewater treatment, and in particular to a device and method for evaporating wastewater from an in-situ leaching uranium evaporation pool under extreme conditions. Background Art

[0002] In-situ uranium leaching mines use an ion exchange process to recover uranium from the leachate. This process generates a significant amount of wastewater, primarily including adsorption tail liquor, resin backwash wastewater, resin conversion wastewater, precipitation mother liquor, and well-washing wastewater. Currently, most wastewater and precipitation mother liquor have complex ion compositions and high impurity content, and are generally treated through natural evaporation in evaporation ponds.

[0003] Natural evaporation in evaporation ponds is rate-limited, requiring large-scale construction. Land acquisition is challenging, so the 30-group scale-up test at the Nalinggou uranium mine cannot be expanded, and the experiment will continue using the original six groups of evaporation ponds. As the test progressed, the high annual rainfall in the area where the in-situ leaching uranium mine is located and the continuous discharge of untreated process water into the evaporation ponds caused the water level in the evaporation ponds to remain high, posing a safety and environmental risk of wastewater leakage.

[0004] Currently, in-situ uranium leaching is often used in the Yili region of Xinjiang and the Ordos region of Inner Mongolia. The winter temperature in the Nalinggou region of Ordos is relatively low, with an average temperature of -28°C and a minimum temperature of -31.4°C. The in-situ uranium leaching wastewater pool is frozen, resulting in slow evaporation of wastewater in winter (ice sublimation), which seriously limits the efficiency of uranium mining.

[0005] According to the calculation of the scale expansion pilot project of 30 groups in Nalinggou, the annual process wastewater generated is about 4300m 3 , including 750m3 of backwash wastewater 3 , transform high-salt wastewater 700m 3 , sedimentation mother liquor wastewater 240m 3 , reverse osmosis high-salt wastewater 350m 3 , filter bag and floor cleaning wastewater 60m 3 , borehole washing wastewater 2200m 3 .

[0006] The supporting evaporation ponds for the 6th group of expansion test in Nalinggou are 60m long and 25m wide, with an evaporation pool area of 1500m 2 , pool depth 2m, maximum capacity 3000m 3 According to local climate data, the maximum rainfall in the region is 800mm, and the average evaporation is 2563mm. The average annual net evaporation in the mining area is 2563mm-800mm=1763mm. 3 / a. Calculated with a safety factor of 0.8, the required evaporation pool area should be 4300m 3 / a÷1.763m / a÷0.8=3049m 2 The actual demand is 2.032 times the area of the evaporation pond in use.

[0007] The temperature in this area is low in winter, with the permafrost layer about 1.5m deep and the lowest temperature reaching around -30℃. The wastewater in the evaporation pond will freeze, resulting in slow evaporation of wastewater in winter (ice sublimation). After entering spring, the waste liquid in the evaporation pond melts, resulting in a high waste liquid level, which in turn affects the production and discharge of new wastewater. Summary of the Invention

[0008] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a device and method for evaporating wastewater from an in-situ leaching uranium evaporation pool under extreme conditions.

[0009] The technical solutions of the present invention are as follows:

[0010] A device for evaporating wastewater from an in-situ leaching uranium evaporation pool under extreme conditions, comprising:

[0011] A plurality of plastic-coated steel wire ropes, each of which is hung with evaporation material, the plastic-coated steel wire ropes are evenly fixed on the evaporation pool, and the bottom of the evaporation material enters the wastewater in the evaporation pool;

[0012] Photothermal mass change materials are attached to the bottom of the evaporation pool, the side walls of the evaporation pool and the evaporation material;

[0013] Surfactants are attached to both the evaporation pool and the evaporation material;

[0014] The evaporation pond contains a flux dissolved therein.

[0015] Furthermore, the evaporation material is an ultra-fine fiber material.

[0016] Furthermore, the plastic coated steel wire ropes are evenly spaced and laid parallel to the wide side of the evaporation pool, with a spacing of 2-4m between the plastic coated steel wire ropes;

[0017] 8-12 pieces of evaporation materials are hung on each plastic-coated steel wire rope;

[0018] The evaporation materials are placed on adjacent plastic-coated steel wire ropes in a fully overlapping manner.

[0019] Furthermore, the evaporation material is 1.2-1.6 m long and 1.2-1.6 m wide.

[0020] Furthermore, the evaporation material is immersed in the wastewater level of the evaporation pond to a depth of 0.1-0.16 m.

[0021] Furthermore, the ratio of the mass of the photothermal material to the area of the wastewater pool is 0.3-0.5 kg / m 2Make the settings.

[0022] Furthermore, the ratio of the mass of the surfactant to the initial volume of the wastewater is 0.0002-0.0003 kg / m 3 .

[0023] Furthermore, the addition ratio of the flux to wastewater is 1:45-55.

[0024] The present invention also discloses a method for evaporating wastewater from an in-situ leaching uranium evaporation pool under extreme conditions, based on any of the above-mentioned devices, comprising the following steps:

[0025] S1: Photothermal mass change materials are set on the bottom, side walls and evaporation material of the evaporation pool, and surfactants are also set in the evaporation pool and on the evaporation material;

[0026] S2: adding flux to the wastewater from the evaporation pond;

[0027] S3: Fold the evaporation material in half and hang it on the plastic-coated steel wire rope, which is evenly fixed on the evaporation pool. The bottom of the evaporation material is immersed in the wastewater in the evaporation pool for evaporation.

[0028] The present invention utilizes rapid evaporation materials to improve the wastewater treatment capacity of in-situ leaching uranium mines. It utilizes photothermal and wind-thermal materials to fully utilize environmental light and wind energy. It also incorporates surfactants to accelerate the rapid evaporation material's siphoning rate, increasing the water content. By superimposing the synergistic effects of multiple materials on the rapid evaporation material, it maximizes evaporation efficiency, reduces the evaporation pond footprint, improves environmental safety, and ultimately lowers the water level in the evaporation pond.

[0029] The present invention can effectively prevent the local wastewater pool from being in an anti-icing state in winter by adding a flux, thereby putting the evaporation device into an anti-icing state, thereby ensuring that the wastewater in the evaporation pool is in a liquid state in winter, and the device can still work normally under extreme conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of a preferred embodiment of the present invention;

[0031] Figure 2 for Figure 1 Side view of

[0032] Figure 3 for Figure 1 A partial enlarged view in FIG;

[0033] In the figure, 1-evaporation material, 2-plastic-coated steel wire rope, 3-evaporation pool, 4-surfactant, 5-photothermal transformation material, 7-wastewater.

[0034] Figure 4 This is a line graph showing the effect of surfactant addition on wastewater evaporation.

[0035] Figure 5 This is a line graph showing the effect of the amount of photothermal material added on promoting wastewater evaporation;

[0036] Figure 6 Schematic diagram of the placement of various evaporation materials. DETAILED DESCRIPTION

[0037] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0039] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] Reference Figures 1 to 3 , the preferred embodiment of the present invention:

[0042] A device for evaporating wastewater from an in-situ leaching uranium evaporation pool under extreme conditions, comprising:

[0043] A plurality of plastic-coated steel wire ropes 2, each of which has an evaporation material 1 suspended thereon, the plastic-coated steel wire ropes 2 being evenly fixed on the evaporation pool 3, and the bottom of the evaporation material 1 entering the wastewater 7 in the evaporation pool 3;

[0044] The photothermal material 5 is attached to the bottom of the evaporation pool 3, the sidewall of the evaporation pool 3 and the evaporation material 1;

[0045] A surfactant is attached to both the evaporation pool 3 and the evaporation material 1;

[0046] The flux is dissolved in the evaporation pool 4 .

[0047] As a preferred embodiment of the present invention, it may also have the following additional technical features:

[0048] In a specific implementation, the evaporation material 1 is an ultra-fine fiber material.

[0049] In specific implementation, the plastic-coated steel wire rope 2 is evenly spaced and laid parallel to the wide side of the evaporation pool 4. The spacing between the plastic-coated steel wire ropes 2 is 2-4m, preferably 3m. Specifically, one end of the plastic-coated steel wire rope 2 is fixed on the fence, and the other end is fixed on the slope of the evaporation pool 4.

[0050] 8-12 pieces of evaporation materials 1 are hung on each plastic-coated steel wire rope 2;

[0051] The evaporation materials are placed on adjacent plastic-coated steel wire ropes in a fully overlapping manner.

[0052] In a specific implementation, the evaporation material 1 is 1.2-1.6 m long and 1.2-1.6 m wide.

[0053] During specific implementation, the evaporation material 1 is immersed in the wastewater level of the evaporation pool to a depth of 0.1-0.16 m.

[0054] In specific implementation, the ratio of the mass of the photothermal material to the area of the wastewater pool is 0.3-0.5 kg / m 2 , preferably 0.3125kg / m 2 The setting is carried out to promote the best effect. In specific application, the actual application amount of the Nalinggou wastewater evaporation pool is 15-16kg. According to the actual relevant calculation data:

[0055] The Nalinggou evaporation pond is 60m long and 25m wide, with an evaporation area of 1500m 2 If the input ratio is 0.5kg / m 2 According to calculation, the total demand for photothermal transformation materials is 750kg.

[0056] If the maximum value exceeds 0.5kg / m 2 , which is too far from the optimal usage ratio. In addition, the carbon powder in the photothermal material can continue to work after use and does not need to be added later.

[0057] In specific implementation, the ratio of the mass of the surfactant to the initial volume of the wastewater is 0.0002-0.0003 kg / m 3 .

[0058] During specific implementation, the addition ratio of the flux to wastewater is 1:45-55, and the flux material can be recycled.

[0059] The present invention also provides a method for evaporating wastewater from an in-situ leaching uranium evaporation pool under extreme conditions, based on any of the above-described devices, comprising the following steps:

[0060] S1: A photothermal material 5 is provided on the bottom, sidewalls and evaporation material 1 of the evaporation pool 4, and a surfactant is also provided on the evaporation pool 3 and the evaporation material 1; preferably, the photothermal material can be powdered activated carbon, cadmium yellow, iron oxide, quinacridone, sodium aluminum silicate sulfide, copper oxide, or manganese dioxide;

[0061] Surfactants are mixtures of cationic surfactants, anionic surfactants and other substances;

[0062] S2: adding flux to the wastewater in the evaporation pool 4; in the following specific application, the flux is a mixture of calcium halide, magnesium halide, sodium halide, and sodium sulfate, and the preferred addition volume ratio is calcium halide: magnesium halide: sodium halide: sodium sulfate: wastewater = 3:4:2:1:500; that is, the ingredients contained are:

[0063] Calcium halide (30%): the ratio of calcium halide to wastewater is 0.3:50;

[0064] Magnesium halide (40%): the ratio of magnesium halide to wastewater is 0.4:50;

[0065] Sodium halide (20%): the ratio of sodium halide to wastewater is 0.2:50;

[0066] Sodium sulfate (10%): the ratio of sodium sulfate to wastewater is 0.1:50;

[0067] S3: Fold the evaporation material 1 in half and hang it on the plastic-coated steel wire rope 2. The plastic-coated steel wire rope 2 is evenly fixed on the evaporation pool 4. The bottom end of the evaporation material 1 is immersed in the wastewater in the evaporation pool 4 for evaporation.

[0068] The following embodiments of the present invention are described in detail. The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in this field or the product specifications are used. Where the manufacturer of the reagents or instruments is not specified, all are conventional products that can be obtained commercially.

[0069] 1. Selection of rapid evaporation materials

[0070] Six materials, including 100% microfiber, 100% bamboo pulp fiber, 100% polyester, 100% spandex, Xinjiang pure cotton, and 100% polyester, were selected for comparative testing. The six materials, all of the same size, were placed in identical beakers, exposed to the same lighting, temperature, wind speed, and humidity. Equal amounts of water were added, and evaporation was measured after 12 and 24 hours. Comparing the test results (Table 1), the 100% microfiber towel achieved the best evaporation performance, evaporating 164 ml of water over 24 hours. Therefore, the 100% microfiber cloth was selected as the fastest evaporation material.

[0071] Table 1 Rapid evaporation material selection test data

[0072]

[0073] 2. Test on the optimal dosage of steam-promoting materials

[0074] (1) Explore the optimal dosage of surfactant

[0075] Select rectangular containers of the same specifications, add the same volume of wastewater (6923g) into the containers, and hang the same specifications of fast evaporation materials in the same way in the containers. The amount of surfactant added is used as a variable, and the surfactant is attached to the evaporation material in the same way. The experiment is carried out in an environment with the same light, temperature, wind speed, and humidity. No surfactant is added as a control experiment. The evaporation amount of the container is measured after 24 hours when different amounts of material are added. By observing the trend of the line graph ( Figure 4 ), the amount of material added has an inhibitory effect on evaporation at the beginning, and as the amount of material added increases, the evaporation promotion effect first increases and then decreases. Adding about 1.8g has the best evaporation effect. At this time, the ratio of surfactant mass to initial wastewater volume is 0.00026kg / m 3 .

[0076] In this embodiment, the main components of the surfactant are as follows:

[0077] (1) Cationic surfactant 0.000091 kg / m 3

[0078] Hexadecyltrimethylammonium bromide (0.000052kg / m 3 ), which can reduce the solid-liquid interfacial energy through positive charge adsorption.

[0079] Cetrimonium chloride (0.000039 kg / m 3 ), the solid-liquid dispersion system can be stabilized by cationic groups.

[0080] (2) Anionic surfactant 0.000104 kg / m 3

[0081] Sodium alkylbenzene sulfonate (0.000052kg / m 3 );

[0082] Sodium lauryl sulfate (0.000026kg / m 3 ), has strong emulsifying ability and foam stability.

[0083] Sodium stearate (0.000026kg / m 3 ), can reduce surface tension by adsorbing at the solid-liquid interface.

[0084] (3) Other components 0.000065kg / m 3

[0085] Fatty alcohol polyoxyethylene ether (0.000013kg / m 2 ) to form hydrogen bonds.

[0086] Sodium tripolyphosphate (0.000039kg / m 2 ), which can prevent metal ions from combining with surfactants and precipitating, while enhancing detergency;

[0087] Sodium acetate (0.000013kg / m 2 ), which can assist in softening water.

[0088] (2) Explore the optimal dosage of photothermal materials

[0089] Use rectangular containers of the same specifications, 37 cm long, 21 cm wide, and a surface area of 0.08 m 2 , the same volume of wastewater was added to the vessel. The amount of photothermal material added was used as a variable. The photothermal material was attached to the bottom of the evaporation pool in the same way. The experiment was carried out in the same environment of light, temperature, wind speed, and humidity. No photothermal material was added as a control experiment. The evaporation amount of the vessel when different amounts of material were added was measured after 24 hours. By observing the trend of the line graph ( Figure 5 ), the photothermal material has a promoting effect on evaporation. As the amount of addition increases, the promoting effect of the material on evaporation increases accordingly. After 25g, the promoting effect almost stops. At this time, the ratio of the mass of the photothermal material to the bottom area of the container is 0.3125kg / m 2 .

[0090] The photothermal material in this embodiment is: 200 mesh powdered activated carbon (0.172 kg / m 2 );

[0091] Cadmium yellow (0.0564kg / m 2 ), iron oxide (0.0376kg / m 2 ) yellow pigment;

[0092] Quinacridone (0.01kg / m 2 ), sodium aluminum silicate sulfide (0.021kg / m 2 ) red pigment;

[0093] Copper oxide (0.0045kg / m 2 ), manganese dioxide (0.011kg / m 2 ), used to absorb heat energy when the flux melts ice.

[0094] (3) Explore the synergistic effect of photothermal materials and surfactants

[0095] Five rectangular containers of identical specifications were selected and filled with the same volume of wastewater. Natural evaporation alone served as control experiment 1. Rapid evaporation materials of the same specifications were suspended in the same manner in the remaining containers, and evaporation by the rapid evaporation material alone served as control experiment 2. Surfactants, photothermal materials, and both surfactants and photothermal materials were added to the surface of the rapid evaporation materials, respectively. The photothermal materials were not added to the bottom of the containers. The experiments were conducted simultaneously in the same environment, and the evaporation volume of the containers was measured after 24 hours. Comparing the experimental results (Table 2), the cumulative evaporation volume after adding the surfactant and photothermal materials over 24 hours was 598.5 ml. This promoting effect was greater than the sum of the promoting effects of adding the surfactant and photothermal materials. Therefore, the photothermal materials and surfactants have a synergistic effect on the evaporation of the rapid evaporation materials.

[0096]

[0097] Table 2 Test data of promoting evaporation of wastewater by evaporation-promoting materials

[0098]

[0099] 3. Experiment on the effect of flux

[0100] Three dry beakers and rectangular containers of identical specifications were selected. Identical volumes of ice were added to each container. The beakers were placed inside the containers. 100ml of ice was added to the beakers, and the ice melted naturally as control experiment 1. Equal volumes of flux and tap water were added, with the ratio of ice volume to liquid added to the beakers being 50:1. Tap water was added as control experiment 2. The beakers were stirred continuously with a glass rod. The time required for the three types of ice to completely melt was measured, and the lowest temperature during the melting process was recorded for each beaker. Comparing the experimental results (Table 3), the time required for complete melting of the ice with flux was the shortest at 69 minutes. The lowest temperature during the melting of the ice in the container was -41.2°C, indicating that flux was effective. In this case, the ice volume to liquid volume ratio was 50:1.

[0101] The co-solvents used in this embodiment are calcium halide, magnesium halide, sodium halide, and sodium sulfate, and the volume ratio of the co-solvents to the wastewater is 3:4:2:1:500.

[0102] Table 3 Test data of the effect of flux on ice melting

[0103] Test Type Melting time Minimum temperature Natural melting 152 minutes -1.3℃ Add tap water 91min -9.2℃ Add flux 69min -41.2℃

[0104] 3. Finding the placement method (height)

[0105] (1) Placement of evaporation materials on adjacent plastic-coated steel wire ropes

[0106] The same rectangular containers of the same specifications were selected and the same volume of wastewater was added to the containers. One container was selected as a control experiment without evaporation material hanging. The remaining containers were hung with evaporation materials of the same specifications on adjacent plastic-coated steel wire ropes in the same way. The placement of evaporation materials on adjacent plastic-coated steel wire ropes was used as a variable, which were no overlap, partial overlap, and full overlap ( Figure 6 ) were suspended in an environment with the same lighting, temperature, wind speed, and humidity. The experiment was conducted after 24 and 48 hours, measuring the evaporation rate when different amounts of material were added. Comparing the experimental results (Table 4), the cumulative evaporation rate after 48 hours of full overlap was 1291 ml, indicating the fastest evaporation rate. Therefore, full overlap was selected for the placement of evaporation material on adjacent plastic-coated steel wire ropes (the evaporation material on the subsequent plastic-coated steel wire rope was aligned with the gap between the adjacent evaporation materials on the previous plastic-coated steel wire rope).

[0107] Table 4 Evaporation effect test data of various evaporation material placement methods

[0108]

[0109] Rectangular containers of identical specifications were used, and the same volume of wastewater was added. Evaporation materials of the same specifications were suspended in the same manner from adjacent plastic-coated steel wire ropes, with the length of the evaporation materials set at 17 cm. The immersion depth of the evaporation materials was used as a variable. Experiments were conducted under the same lighting, temperature, wind speed, and humidity conditions. The evaporation yield at different depths of immersion in the wastewater was measured after 24 and 48 hours. Comparison of the experimental results (Table 5) shows that the highest evaporation yield, 1127 ml, was achieved when the evaporation material was suspended at a height of 14 cm. At this point, the immersion height to fabric length ratio was 17.6%.

[0110] Table 5 Test data of evaporation effect of different depths of immersion in wastewater

[0111]

[0112] 5. Verification of the overall experimental effect

[0113] Two rectangular containers of the same specifications were selected and the same volume of wastewater was added to the containers. The control group relied on natural evaporation as a control experiment, while the experimental group added rapid evaporation materials, surfactants, and photothermal quality change materials. The above materials were all added in the optimal amount, and the placement and immersion depth of the rapid evaporation materials were the optimal hanging method (detailed method and device diagram are located at Figure 1 The evaporation of the experimental and control groups was measured after 24 and 216 hours, respectively. Comparing the experimental results (Table 6), the cumulative evaporation of the experimental group after 216 hours was 17.65 L, while the cumulative evaporation of the control group after 216 hours was 7.07 L. The evaporation of the experimental group was 2.5 times that of the control group, indicating that the use of the device can increase the evaporation efficiency by 2.5 times.

[0114] Table 6 Test data of evaporation effect of different depths of immersion in wastewater

[0115]

[0116] 6. Total investment cost for rapid evaporation of wastewater

[0117] Table 7 Input costs for rapid evaporation of wastewater

[0118]

[0119] Note: The surfactant should be replaced every half a month, and the rapid evaporation material should be replaced every six months.

[0120] In summary, the present invention superimposes the synergistic effects of multiple materials on the rapid evaporation material, thereby improving the evaporation efficiency as much as possible, reducing the area occupied by the evaporation pool, improving the environmental safety quality, and achieving the purpose of lowering the water level of the evaporation pool.

[0121] Under the premise that no conflict occurs, those skilled in the art may freely combine and superimpose the above-mentioned additional technical features.

[0122] The above-described embodiments merely represent preferred implementations of the present invention. While the descriptions thereof are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various other corresponding changes and modifications based on the technical solutions and concepts described above, and all such changes and modifications should fall within the scope of protection of the claims of the present invention.

Claims

1. A wastewater evaporation device for in-situ leaching uranium evaporation pools under extreme conditions, characterized in that: include: A plurality of plastic-coated steel wire ropes (2), each of which has an evaporation material (1) suspended thereon, the plastic-coated steel wire ropes (2) being evenly fixed on an evaporation pool (3), and the bottom of the evaporation material (1) entering into the wastewater (7) of the evaporation pool (3); The photothermal mass change material (5) is attached to the bottom of the evaporation pool (3), the side wall of the evaporation pool (3) and the evaporation material (1); A surfactant is attached to both the inside of the evaporation pool (3) and the evaporation material (1); and a flux is dissolved in the evaporation pool (4).

2. The wastewater evaporation device for in-situ leaching uranium evaporation pool under extreme conditions according to claim 1, characterized in that: The evaporation material (1) is an ultra-fine fiber material.

3. The wastewater evaporation device for in-situ leaching uranium evaporation pool under extreme conditions according to claim 1, characterized in that: The plastic coated steel wire ropes (2) are evenly spaced and arranged parallel to the wide side of the evaporation pool (4), and the spacing between the plastic coated steel wire ropes (2) is 2-4m; 8-12 pieces of evaporation materials (1) are hung on each plastic-coated steel wire rope (2); The evaporation materials are placed on adjacent plastic-coated steel wire ropes in a fully overlapping manner.

4. The wastewater evaporation device for in-situ leaching uranium evaporation pool under extreme conditions according to claim 1, characterized in that: The evaporation material (1) is 1.2-1.6 m long and 1.2-1.6 m wide.

5. The wastewater evaporation device for in-situ leaching uranium evaporation pool under extreme conditions according to claim 4, characterized in that: The evaporation material (1) is immersed in the wastewater liquid level of the deep evaporation pool to a depth of 0.1-0.16m.

6. The wastewater evaporation device for in-situ leaching uranium evaporation pool under extreme conditions according to claim 1, characterized in that: The ratio of the mass of the photothermal material to the area of the wastewater pool is 0.3-0.5 kg / m 2 Make the settings.

7. The wastewater evaporation device for in-situ leaching uranium evaporation pool under extreme conditions according to claim 1, characterized in that: The ratio of the surfactant mass to the initial volume of wastewater is 0.0002-0.0003 kg / m 3 .

8. The wastewater evaporation device for in-situ leaching uranium evaporation pool under extreme conditions according to claim 1, characterized in that: The added volume ratio of the flux to the wastewater is 1:45-55.

9. A method for evaporating wastewater from in-situ leaching uranium evaporation pools under extreme conditions, based on the apparatus according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: a photothermal mass change material (5) is provided on the bottom and sidewalls of the evaporation pool (4) and on the evaporation material (1), and a surfactant is also provided in the evaporation pool (3) and on the evaporation material (1); S2: adding flux to the wastewater from the evaporation pond (4); S3: The evaporation material (1) is folded in half and hung on the plastic-coated steel wire rope (2), the plastic-coated steel wire rope (2) is evenly fixed on the evaporation pool (4), and the bottom end of the evaporation material (1) is immersed in the wastewater in the evaporation pool (4) for evaporation.

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