Combined evaporation treatment system for uranium mine wastewater

Abstract

The utility model provides a uranium mine wastewater combined evaporation treatment system. An evaporation beach face unit, a carrier band evaporation unit and a bubbling evaporation unit are designed. The beach face evaporation unit, the carrier band evaporation unit and the bubbling evaporation unit are connected in parallel or in series. The beach face evaporation unit comprises a water spraying micropore floral tube, an evaporation beach face, a water collecting ditch and an overflow water receiving groove. The carrier tape evaporation unit comprises a hanging evaporation piece, a water distribution pipe, a control valve and a water tank. The bubbling evaporation unit comprises a water storage tank, an air distribution pipe, a fan, a heating pipe and a heating circulating water pipe. Uranium mine wastewater is circularly sprayed on the evaporation beach face and the suspended evaporation sheet for evaporation and bubbling evaporation, the evaporation area is increased, circular treatment and heat supply are greatly reduced, frequent manual maintenance is not needed, and the treatment efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of radioactive wastewater treatment, and in particular relates to a uranium mine wastewater combined evaporation treatment system. Background Art

[0002] The treatment of uranium mine wastewater is a complex and important field of environmental governance. At present, the main treatment technologies for uranium-containing wastewater include chemical precipitation, ion exchange, adsorption, membrane separation, microbial method, phytoremediation and evaporation concentration.

[0003] Among them, the evaporation concentration method has a higher concentration factor and purification coefficient. Its working principle is: send the radioactive wastewater into the evaporation device, evaporate the water into water vapor, and the radioactive nuclides remain in the water. The condensed water formed during the evaporation process is discharged or reused, and the concentrated liquid is further solidified. The evaporation concentration method consumes a lot of heat energy, has low evaporation efficiency, high equipment and operation costs, and requires personnel maintenance. At the same time, potential threats such as corrosion, scaling, and explosion must be considered during design and operation. It is not suitable for the long-term treatment of large amounts of wastewater such as uranium mines.

[0004] In order to improve treatment efficiency, reduce equipment and operating costs, reduce personnel maintenance, and enable long-term use for batch radioactive wastewater, it is also necessary to develop and design a radioactive wastewater treatment system. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a uranium mine wastewater combined evaporation treatment system. Through reasonable design, a beach evaporation unit, a carrier evaporation unit, and a bubbling evaporation unit are respectively set up to distribute the uranium mine wastewater on the evaporation beach and the suspended evaporation sheet of the carrier evaporation unit, and use air bubbling to greatly increase the contact area between wastewater and air and improve evaporation efficiency. The equipment design is simplified, the equipment and operating costs are greatly reduced, the heat supply is reduced, and it can operate stably for a long time.

[0006] The utility model aims to provide a uranium mine wastewater combined evaporation treatment system, which comprises a beach evaporation unit, a carrier evaporation unit and a bubbling evaporation unit.

[0007] The beach evaporation unit, the carrier evaporation unit and the bubbling evaporation unit are connected in parallel or in series.

[0008] The beach surface evaporation unit comprises a water sprinkling microporous flower tube, an evaporation beach surface, a water collecting ditch, and an overflow water receiving trough.

[0009] The carrier evaporation unit comprises a hanging evaporation sheet, a water distribution pipe, a control valve and a water tank.

[0010] The bubbling evaporation unit comprises a water storage tank, an air distribution pipe, a fan, a heating pipe and a heating circulating water pipe.

[0011] The utility model has the following beneficial effects:

[0012] (1) The utility model designs an evaporation beach unit and a carrier evaporation unit, which circulates and sprays uranium mine wastewater on the evaporation beach and the suspended evaporation sheets for evaporation, thereby increasing the evaporation area and performing cyclic treatment without providing heat.

[0013] (2) The utility model designs a bubbling evaporation unit, which injects bubbles through a water distribution pipe and only provides a heat source for the bubbling air, thereby accelerating the evaporation efficiency and greatly reducing the use of heat.

[0014] (3) The uranium mine wastewater combined evaporation treatment system of the utility model does not require frequent manual maintenance. The beach area, the area of ​​the hanging evaporation sheet, the water tank size of the bubbling evaporation unit, the air distribution pipe arrangement area, the number of beach evaporation units, carrier evaporation units and bubbling evaporation units can be designed according to the treatment volume, thereby greatly improving the treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It shows a schematic diagram of the serial structure of the beach evaporation unit 1, the carrier evaporation unit 2 and the bubbling evaporation unit 3 of the utility model;

[0016] Figure 2 It shows a schematic diagram of the parallel structure of the beach evaporation unit 1, the carrier evaporation unit 2 and the bubbling evaporation unit 3 of the utility model;

[0017] Figure 3 A schematic structural diagram of a beach evaporation unit of the utility model is shown;

[0018] Figure 4 A schematic structural diagram of a carrier evaporation unit of the utility model is shown;

[0019] Figure 5 The utility model shows a structural schematic diagram of a bubbling evaporation unit.

[0020] Description of Figure Numbers

[0021] 1- Beach surface evaporation unit;

[0022] A-water-sprinkling microporous flower tube;

[0023] B-evaporation beach;

[0024] C-drainage ditch;

[0025] D- overflow water tank;

[0026] E-Tail stone Kanji;

[0027] F-bituminous insulation layer;

[0028] G-granular carbon layer;

[0029] 2-Carrier evaporation unit;

[0030] 201-suspended evaporation sheet;

[0031] 202-water pipes;

[0032] 203-control valve;

[0033] 204-sink;

[0034] 3- Bubble evaporation unit;

[0035] 301- water storage tank;

[0036] 3011-Insulation layer;

[0037] 3012- Exhaust hole;

[0038] 302-tracheal pipe;

[0039] 303- fan;

[0040] 304-heating tube;

[0041] 305-heating circulating water pipe;

[0042] 306-Solar panels. DETAILED DESCRIPTION

[0043] The present invention will be described in detail below through specific implementation modes, and the features and advantages of the present invention will become clearer and more explicit with these descriptions.

[0044] The utility model provides a uranium mine wastewater combined evaporation treatment system, which comprises a beach surface evaporation unit 1, a carrier evaporation unit 2 and a bubbling evaporation unit 3.

[0045] The beach evaporation unit 1, the carrier evaporation unit 2 and the bubbling evaporation unit 3 are connected in parallel or in series. The schematic diagram of the series structure of the beach evaporation unit 1, the carrier evaporation unit 2 and the bubbling evaporation unit 3 is as shown in FIG. Figure 1 The parallel structure diagram is shown in Figure 2 shown.

[0046] In the uranium mine wastewater combined evaporation treatment system, when connected in parallel, the uranium mine wastewater is divided into three branches and simultaneously enters the beach evaporation unit 1, the carrier evaporation unit 2 and the bubbling evaporation unit 3 for circulation treatment within the units; when connected in series, the uranium mine wastewater enters the beach evaporation unit 1, the carrier evaporation unit 2 and the bubbling evaporation unit 3 in sequence for circulation treatment.

[0047] Preferably, the uranium mine wastewater first passes through a sand filter tank and then enters a uranium mine wastewater combined evaporation treatment system to remove solid particles in the uranium mine wastewater to avoid clogging of the pipeline.

[0048] The beach evaporation unit 1 includes a water-spraying microporous flower tube A, an evaporation beach B, a water collection ditch C and an overflow water receiving trough D. Figure 3 shown.

[0049] The water sprinkling microporous flower tube A is fixed on the top of the evaporation beach surface B, and is provided with a plurality of spray holes. The water outlet direction of the spray holes is parallel to the beach surface and downward. After the uranium mine wastewater enters the water sprinkling microporous flower tube A, it is sprayed onto the upper surface of the evaporation beach surface B through the spray holes.

[0050] The water collection ditch C is a strip-shaped water trough arranged at the bottom of the slope surface of the evaporation beach surface B, with one end open and the other end closed, receiving water flowing down the slope surface and flowing out from the open end.

[0051] The overflow water receiving tank D is below the open end of the water collecting ditch C, and receives the uranium mine wastewater flowing out of the water collecting ditch C. The overflow water receiving tank D is provided with a liquid level sensor. When the liquid level reaches a preset value, the valve is opened and the water is pumped out by a water pump. In one embodiment of the utility model, the water in the overflow water receiving tank D is pumped out and returned to the watering microporous flower tube A for circulating evaporation; in another embodiment of the utility model, the water in the overflow water receiving tank D is pumped out to the next evaporation unit.

[0052] The evaporation beach B includes a tailstone base E, an asphalt insulation layer F and a granular carbon layer G. The tailstone base E is placed on the ground as a base, and a slope surface is set from top to bottom to form an evaporation surface, which plays a role of fixing and supporting. The asphalt insulation layer F is laid flat on the slope surface of the tailstone base E, and is formed by flattening and pressing asphalt, which plays a role in absorbing heat and improving evaporation efficiency. The granular carbon layer G is formed by granular activated carbon evenly dispersed on the upper surface of the asphalt insulation layer F. The granular carbon can absorb and retain moisture, prolong the residence time of moisture on the surface of the evaporation beach B, so as to fully absorb heat, reduce circulation, make full use of the natural wind speed on the slope, and accelerate evaporation. Specifically, Figure 3 shown.

[0053] The carrier evaporation unit 2 includes a hanging evaporation sheet 201, a water distribution pipe 202, a control valve 203 and a water tank 204. Figure 4 shown.

[0054] The pipelines entering the carrier evaporation unit 2 are arranged as a plurality of pipelines connected to the control valve 203 to control the entry and flow of uranium mine wastewater. The control valve 203 is connected to the water distribution pipe 202 arranged in parallel. A vertically downward hanging evaporation sheet 201 is arranged at the bottom of the water distribution pipe 202, and a water distribution hole is arranged on the water distribution pipe 202, and the spray direction of the water distribution hole is toward the surface of the hanging evaporation sheet 201. The hanging evaporation sheet 201 is a glass fiber cloth or a stainless steel mesh.

[0055] After the uranium mine wastewater enters the water distribution pipe 202 through the control valve 203, it is sprayed toward the suspended evaporation sheet 201 through the water distribution hole. The uranium mine wastewater will cover the suspended evaporation sheet 201, thereby achieving evaporation of water.

[0056] The water tank 204 is arranged below the suspended evaporation sheet 201, and is used to receive the uranium mine wastewater that overflows and drips from the suspended evaporation sheet 201. A water outlet is arranged at the lower part of the water tank 204, and the uranium mine wastewater in the water tank 204 is discharged and circulated to the water inlet pipeline of the carrier evaporation unit 2 or discharged to the next treatment unit.

[0057] The bubbling evaporation unit 3 includes a water storage tank 301, an air distribution pipe 302, a fan 303, a heating pipe 304 and a heating circulation water pipe 305. Figure 5 shown.

[0058] The water storage tank 301 is provided with a water inlet for introducing uranium mine wastewater. Preferably, a heat-insulating layer 3011 is provided on the inner wall to keep the water storage tank 301 warm. An exhaust hole 3012 is provided on the top of the water storage tank 301.

[0059] The air distribution pipe 302 is in an "E" shape or a mesh shape, and is disposed at the bottom of the water storage tank 301. The air distribution pipe 302 is provided with air distribution holes. The air distribution pipe 302 is provided with an air inlet, which is connected to the fan 303 through a pipeline. The heating pipe 304 is disposed between the fan 303 and the air inlet of the air distribution pipe 302.

[0060] When working, the fan 303 starts, and the air is introduced into the heating pipe 304 to heat the gas, and then enters the air distribution pipe 302 through the air inlet of the air distribution pipe 302, and then enters the water storage tank 301 through the air distribution hole. The preheated air generates small bubbles in the liquid and absorbs the heat of the wastewater and the evaporated water vapor on the way up to form wet steam. When the bubbles burst on the liquid surface, the wet steam is naturally discharged from the exhaust hole 3012, which plays the role of evaporating water vapor.

[0061] The heating circulating water pipe 305 is a "U"-shaped pipe arranged inside the water storage tank 301, and circulating hot water can be introduced to heat the uranium mine wastewater in the water storage tank 301. Preferably, a solar panel 306 is also provided, and the heating circulating water pipe 305 is connected to the solar panel 306, and the solar panel 306 is used to heat the circulating water to continuously provide heat for the uranium mine wastewater.

[0062] The utility model designs and develops a uranium mine wastewater combined evaporation treatment system, including an evaporation beach unit, a carrier evaporation unit, and a bubbling evaporation unit. The uranium mine wastewater is cyclically sprayed on the evaporation beach and the suspended evaporation sheet for evaporation, bubbling evaporation, increasing the evaporation area, and cyclic treatment. The heat supply is greatly reduced, and frequent manual maintenance is not required. The beach area, the area of ​​the suspended evaporation sheet, the water tank size of the bubbling evaporation unit, the air distribution pipe arrangement area, and the number of beach evaporation units, carrier evaporation units, and bubbling evaporation units can be designed according to the wastewater treatment volume, and the treatment efficiency is greatly improved.

[0063] The present invention is described in detail above in conjunction with the specific implementation methods and the accompanying drawings, but these descriptions cannot be understood as limiting the present invention. Those skilled in the art understand that, without departing from the spirit and scope of the present invention, the technical solution of the present invention and its implementation methods may be subjected to a variety of equivalent substitutions, modifications or improvements, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

Claims

1. A uranium mine wastewater combined evaporation treatment system, characterized in that: It comprises a beach evaporation unit (1), a carrier evaporation unit (2) and a bubbling evaporation unit (3). The beach evaporation unit (1) comprises a water-spraying microporous flower tube (A), an evaporation beach (B), a water collection ditch (C) and an overflow water receiving trough (D). The carrier evaporation unit (2) comprises a suspended evaporation sheet (201), a water distribution pipe (202), a control valve (203) and a water tank (204). The bubbling evaporation unit (3) comprises a water storage tank (301), an air distribution pipe (302), a fan (303), a heating pipe (304) and a heating circulation water pipe (305).

2. The uranium mine wastewater combined evaporation treatment system according to claim 1 is characterized in that: The beach surface evaporation unit (1), the carrier evaporation unit (2) and the bubbling evaporation unit (3) are connected in parallel or in series.

3. The uranium mine wastewater combined evaporation treatment system according to claim 2 is characterized in that: The water-spraying microporous flower tube (A) is fixed on the top of the evaporation beach surface (B), and is provided with a plurality of spray holes, and the water outlet direction of the spray holes is parallel to the beach surface and downward.

4. The uranium mine wastewater combined evaporation treatment system according to claim 3 is characterized in that: The water collection ditch (C) is a strip-shaped water trough arranged at the bottom of the slope surface of the evaporation beach surface (B), with one end open and the other end closed; The overflow water receiving trough (D) is below the open end of the water collecting ditch (C).

5. The uranium mine wastewater combined evaporation treatment system according to claim 2 is characterized in that: The evaporation beach (B) comprises a tailstone base (E), an asphalt insulation layer (F) and a granular carbon layer (G). The tailstone sill (E) is placed on the ground as a base, and a slope from top to bottom is set to form an evaporation surface. The asphalt insulation layer (F) is laid flat on the slope surface of the tailstone ridge (E) and is formed by flatly pressing asphalt. The granular carbon layer (G) is formed by uniformly dispersing granular activated carbon on the upper surface of the asphalt insulation layer (F).

6. The uranium mine wastewater combined evaporation treatment system according to claim 2 is characterized in that: The pipelines entering the carrier evaporation unit (2) are arranged to be connected to a plurality of pipeline control valves (203), the control valves (203) are communicated with water distribution pipes (202) arranged in parallel, and water distribution holes are arranged on the water distribution pipes (202). A vertically downward hanging evaporation sheet (201) is arranged at the bottom of the water distribution pipe (202), and the spraying direction of the water distribution hole is toward the surface of the hanging evaporation sheet (201). The hanging evaporation sheet (201) is a glass fiber cloth or a stainless steel mesh. The water tank (204) is arranged below the suspended evaporation sheet (201).

7. The uranium mine wastewater combined evaporation treatment system according to claim 2 is characterized in that: The water storage tank (301) is provided with a water inlet, and an inner wall thereof is provided with a heat-insulating layer (3011).

8. The uranium mine wastewater combined evaporation treatment system according to claim 2 is characterized in that: The air distribution pipe (302) is in an "E" shape or a mesh shape and is arranged at the bottom of the water storage tank (301). The air distribution pipe (302) is provided with air distribution holes.

9. The uranium mine wastewater combined evaporation treatment system according to claim 8, characterized in that: The air distribution pipe (302) is provided with an air inlet, which is connected to the fan (303) through a pipeline, and the heating pipe (304) is arranged between the fan (303) and the air inlet of the air distribution pipe (302).

10. The uranium mine wastewater combined evaporation treatment system according to claim 8, characterized in that: The heating circulating water pipe (305) is arranged in a U-shaped pipe inside the water storage tank (301), and a solar panel (306) is also arranged. The heating circulating water pipe (305) is connected to the solar panel (306).

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