Anti-clogging uranium ore in-situ leaching dense fixed bed adsorption column and use method

Abstract

The application discloses a kind of anti-clogging uranium in-situ leaching liquid dense fixed bed adsorption tower and anti-clogging uranium in-situ leaching liquid dense fixed bed adsorption system, and the floc of resin bed layer blocked by setting backwashing water inlet and outlet in suitable position can be washed out.The backwashing unblocking process is carried out in the tower, and automation operation can be realized, which can effectively reduce the number of equipment sets, construction investment and labor intensity of operating personnel.The application also provides a method for using the anti-clogging uranium in-situ leaching liquid dense fixed bed adsorption tower, and using the method can realize continuous liquid feeding of the adsorption tower during unblocking, and the liquid feeding flow remains unchanged, without the need to set a large volume of adsorption stock solution storage tank upstream for unblocking process.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydrometallurgy, and particularly relates to a dense fixed bed adsorption tower for preventing blockage of in-situ leaching solution of uranium mines and a use method. BACKGROUND

[0002] The dense fixed bed adsorption tower is simple in operation, large in processing flow, and is widely applied to in-situ leaching solution adsorption of in-situ leaching uranium mines. However, in the adsorption process, the resin in the tower has no relative displacement, and the resin bed is in a dense state, which can intercept the flocculent and impurities entrained in the leaching solution. With the accumulation of the liquid inlet flow, the flocculent can block the resin bed, resulting in increased bed resistance, increased pressure at the top of the adsorption tower, and reduced liquid inlet flow.

[0003] In order to solve the problem of blockage of the resin bed by the flocculent and impurities entrained in the leaching solution, a bag filter is used for filtering before the leaching solution enters the tower in the current production of in-situ leaching uranium mines. This not only requires a large number of filtering equipment, increases the equipment sets of the adsorption device, and increases the construction investment, but also requires frequent cleaning of the filter bag. There are as many as 24 filter bags for each filter, and manual operation is required for disassembly and installation, which is not only labor-intensive, but also causes high radiation contamination of the operator. SUMMARY

[0004] The application aims to overcome the shortcomings of the prior art, and provides a dense fixed bed adsorption tower for preventing blockage of in-situ leaching solution of uranium mines. The flocculent that blocks the resin bed can be flushed out by setting a backwash water inlet and outlet at a suitable position. The backwashing and unblocking process is carried out in the tower, and can be automatically operated, which can effectively reduce the equipment sets, construction investment, and labor intensity of the operator.

[0005] The application is achieved by the following technical solutions:

[0006] A dense fixed bed adsorption tower for preventing blockage of in-situ leaching solution of uranium mines, comprising a tower body and a resin bed arranged in the tower body.

[0007] An adsorption raw liquid inlet, an adsorption tail liquid outlet, a backwash liquid inlet, and a backwash liquid outlet are arranged on the tower body.

[0008] The adsorption raw liquid inlet is arranged at the top of the tower body, and the adsorption tail liquid outlet is arranged at the bottom of the tower body.

[0009] The backwash liquid inlet is arranged at a position 0.2-1 meters below the top of the resin bed on the side wall of the tower body.

[0010] The backwash liquid outlet is arranged between the adsorption raw liquid inlet and the backwash liquid inlet.

[0011] The valve provided on the pipeline connected with the backwash liquid outlet can adjust the flow.

[0012] In the technical scheme, the backwash liquid inlet is arranged on the sidewall of the tower body, at a position 0.2-0.8 meters below the top of the resin bed layer; and the backwash liquid outlet is arranged at a position 0.4-1.6 meters above the top of the resin bed layer.

[0013] In the technical scheme, the backwash liquid inlet is connected with a liquid distribution device in the direction of the tower.

[0014] In the technical scheme, the backwash liquid inlet is arranged in multiple, each backwash liquid inlet is connected with a liquid distribution pipe, and the liquid distribution pipes are arranged in parallel and equidistantly.

[0015] In the technical scheme, the liquid distribution pipe is provided with a liquid distribution hole on the pipe wall, the opening direction of the liquid distribution hole includes horizontal direction, oblique downward direction and downward direction, and the hole diameter of the liquid distribution hole is 0.5-2 mm. The number of holes is determined according to the horizontal sectional area corresponding to each pipe.

[0016] In order to avoid that the resin enters the liquid distribution pipe in abnormal working conditions, the other end of the liquid distribution pipe extends out of the tower body and is connected with a transparent pipe and a ball valve, and when it is observed that there is resin or other sundries in the pipe, the valve can be opened to discharge the resin or other sundries.

[0017] In the technical scheme, the backwash liquid outlet is arranged in multiple and is uniformly distributed along the circumference of the tower body; the backwash liquid outlet is connected with an inner extension liquid pipe in the direction of the tower, and the inner extension liquid pipe is arranged along the radial direction of the cross section of the tower body. The inner extension liquid pipe in the direction of the tower can ensure smooth liquid outlet in the central area of the tower, and the effect is more obvious when the diameter of the tower is large.

[0018] In the technical scheme, the backwash liquid outlet is connected with an outer discharge pipeline, and a filter screen is arranged on the outer discharge pipeline to intercept a small amount of resin that may be discharged.

[0019] In the technical scheme, the filter screen is specifically an arc-shaped screen.

[0020] Another object of the present application is to provide a clog-preventing uranium ore in-situ leaching liquid dense fixed bed adsorption system.

[0021] A clog-preventing uranium ore in-situ leaching liquid dense fixed bed adsorption system, comprising an adsorption raw liquid pump, a dense fixed bed adsorption tower, an arc-shaped screen and a backwash liquid collecting pool.

[0022] The dense fixed bed adsorption tower is the clog-preventing uranium ore in-situ leaching liquid dense fixed bed adsorption tower described in the technical scheme.

[0023] The adsorption stock solution pump is connected with the adsorption stock solution inlet and the backwashing liquid inlet of the dense fixed bed adsorption tower through pipes respectively; the backwashing liquid outlet of the dense fixed bed adsorption tower is connected with the arc screen through an external discharge pipe; and the liquid outlet of the arc screen is connected with the backwashing liquid collecting tank pipe.

[0024] Another object of the present application is to provide a use method of the anti-blocking uranium in-situ leaching liquid dense fixed bed adsorption tower.

[0025] The use method of the anti-blocking uranium in-situ leaching liquid dense fixed bed adsorption tower is the use method of the anti-blocking uranium in-situ leaching liquid dense fixed bed adsorption tower as described in the above technical solution, and comprises the following steps.

[0026] Step 1, adsorption process, the adsorption stock solution flows into from the adsorption stock solution inlet at the top of the dense fixed bed adsorption tower, flows through the resin bed layer, and the adsorption tail liquid flows out through the adsorption tail liquid outlet at the bottom of the dense fixed bed adsorption tower;

[0027] Step 2, backwashing process, when it is necessary to remove the flocculent mud trapped by the resin, the pipe for the adsorption stock solution to enter the dense fixed bed adsorption tower is changed, and the adsorption stock solution is changed to flow in through the backwashing liquid inlet; part of the adsorption stock solution flows downward through the resin bed layer to perform normal adsorption operation, the adsorption tail liquid flows out through the adsorption tail liquid outlet at the bottom of the dense fixed bed adsorption tower; and the other part of the adsorption stock solution flows upward to perform fluidized backwashing on the resin bed layer located at the upper part of the backwashing liquid inlet, and the backwashing liquid and the flocculent mud flow out through the backwashing liquid outlet.

[0028] In the above technical solution, the flow rate of the backwashing liquid flowing out from the backwashing liquid outlet is controlled to control the fluidized expansion height of the resin bed layer at the upper part of the backwashing liquid inlet, so that the resin interface is lower than the backwashing liquid outlet, and the resin is prevented from flowing out of the dense fixed bed adsorption tower.

[0029] In the above technical solution, the flow rate of the adsorption stock solution flowing in from the adsorption stock solution inlet in the adsorption process is the same as the flow rate of the adsorption stock solution flowing in from the backwashing liquid inlet in the backwashing process.

[0030] The present application has the following advantages and beneficial effects:

[0031] 1. By adopting the technical solution of the present application, a special filtering process and equipment are no longer needed, the backwashing and unblocking process is performed in the tower, and automatic operation can be realized, so that the number of equipment sets, the construction investment and the labor intensity of the operating personnel can be effectively reduced.

[0032] 2. The liquid inlet of the adsorption tower does not stop during unblocking, and the flow rate of the liquid inlet is unchanged, so that a large-volume adsorption stock solution storage tank does not need to be arranged in the upstream for the unblocking process. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structure diagram of the anti-blocking uranium in-situ leaching liquid dense fixed bed adsorption tower of embodiment 1 of the present application; wherein,

[0034] a is an adsorption raw liquid inlet, b is a pressure gauge port 1, c is an exhaust port, d is a resin inlet, e is a elution agent, a transformation agent inlet, h is a resin discharge port, j is a pressure gauge port 2, k1-4 is a backwashing liquid inlet, m1-4 is a backwashing liquid outlet, n1-8 is a wire-wound tube filter, and p is an adsorption tail liquid, elution liquid, and transformation liquid outlet;

[0035] Figure 2 is a backwashing process diagram of the anti-blocking uranium in-situ leaching liquid dense fixed bed adsorption tower of embodiment 2 of the present application.

[0036] Figure 3 is a process flow diagram of the anti-blocking uranium in-situ leaching liquid dense fixed bed adsorption system of embodiment 3 of the present application.

[0037] Figure 4 is a backwashing liquid inlet and liquid distribution pipe diagram of the anti-blocking uranium in-situ leaching liquid dense fixed bed adsorption tower of embodiment 4 of the present application.

[0038] Figure 5 is an A-A sectional view of embodiment 4 of the present application.

[0039] Figure 6 is a B-B sectional view of embodiment 4 of the present application.

[0040] Figure 7 is a C-C sectional view of embodiment 4 of the present application.

[0041] Figure 8 is a backwashing liquid outlet and inner liquid outlet pipe diagram of the anti-blocking uranium in-situ leaching liquid dense fixed bed adsorption tower of embodiment 4 of the present application.

[0042] For those skilled in the art, other related drawings can be obtained according to the above drawings without creative labor. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the present application, the technical solutions of the present application will be further described below in combination with specific embodiments.

[0044] Embodiment 1

[0045] An anti-blocking uranium in-situ leaching liquid dense fixed bed adsorption tower, the dense fixed bed adsorption tower comprising a tower body and a resin bed layer arranged inside the tower body; the tower body has a diameter of 5 m, a straight cylinder segment height of 6 m, and an internal resin bed layer height of 4 m;

[0046] The tower body is provided with an adsorption raw liquid inlet, an adsorption tail liquid outlet, a backwashing liquid inlet and a backwashing liquid outlet;

[0047] The adsorption raw liquid inlet is arranged at the top of the tower body, and the adsorption tail liquid outlet is arranged at the bottom of the tower body and connected to the bottom of the tower body through a wire-wound tube filter;

[0048] The backwashing liquid inlet is arranged at a position 0.5 m below the top of the resin bed layer on the side wall of the tower body, and the backwashing liquid inlet is provided with four (k1-k4) and is uniformly distributed along the circumference of the tower body.

[0049] The backwashing liquid outlet is arranged at a position 1 m above the top of the resin bed layer, and the backwashing liquid outlet is provided with four and is uniformly distributed along the circumference of the tower body.

[0050] Example 2

[0051] A use method of the anti-blocking uranium ore in-situ leaching liquid dense fixed bed adsorption tower, the anti-blocking uranium ore in-situ leaching liquid dense fixed bed adsorption tower is the anti-blocking uranium ore in-situ leaching liquid dense fixed bed adsorption tower described in example 1, comprising the following steps:

[0052] Step 1, adsorption process, the adsorption raw liquid flows into the adsorption raw liquid inlet at the top of the dense fixed bed adsorption tower, flows through the resin bed layer, and the adsorption tail liquid flows out through the adsorption tail liquid outlet at the bottom of the dense fixed bed adsorption tower; the adsorption raw liquid flow is 10 m / h-60 m / h of empty tower linear velocity, and the adsorption raw liquid turbidity is less than 5 NTU;

[0053] Step 2, backwashing process, when it is necessary to remove the flocculent mud intercepted by the resin (when the top pressure of the tower is increased by about 0.15 MPa compared with the initial pressure), the pipeline of the adsorption raw liquid into the dense fixed bed adsorption tower is changed, and the adsorption raw liquid is changed to flow into the backwashing liquid inlet; a part of the adsorption raw liquid flows downward through the resin bed layer to perform normal adsorption operation, and the adsorption tail liquid flows out through the adsorption tail liquid outlet at the bottom of the dense fixed bed adsorption tower; another part of the adsorption raw liquid flows upward to fluidize and backwash the resin bed layer located above the backwashing liquid inlet, and the backwashing liquid and the flocculent mud flow out through the backwashing liquid outlet. The flow rate of the adsorption raw liquid flowing into the adsorption raw liquid inlet in the adsorption process is the same as the flow rate of the adsorption raw liquid flowing into the backwashing liquid inlet in the backwashing process.

[0054] By controlling the flow rate of the backwashing liquid flowing out of the backwashing liquid outlet (corresponding to an empty tower linear velocity of about 20 m / h), the fluidized expansion height of the resin bed layer above the backwashing liquid inlet (corresponding to a bed expansion rate of 100%-180% of the backwashing liquid outlet flow rate) is controlled, so that the resin interface is lower than the backwashing liquid outlet, and the resin is prevented from flowing out of the dense fixed bed adsorption tower.

[0055] The backwashing process lasts about 8 minutes, during which the turbidity of the backwashing effluent is obviously reduced. When the turbidity is less than 50 NTU, the backwashing process is ended. During backwashing, the backwashing effluent enters the sieve bend. By observing the sieve bend, it can be determined whether resin is washed out.

[0056] Example 3

[0057] A clogging-preventing uranium in-situ leaching liquid dense fixed bed adsorption system comprises an adsorption original liquid pump (pump flow 1100 m 3 / h, head 60 m), a dense fixed bed adsorption tower, a sieve bend (sieve bend mesh 30 mesh, sieve surface area 9.2 m2), and a backwashing liquid collection tank (glass steel combined water tank volume 150 m 3 ). The dense fixed bed adsorption tower is the clogging-preventing uranium in-situ leaching liquid dense fixed bed adsorption tower described in Example 1.

[0058] The adsorption original liquid pump is connected to the adsorption original liquid inlet and the backwashing liquid inlet of the dense fixed bed adsorption tower through pipelines. The backwashing liquid outlet of the dense fixed bed adsorption tower is connected to the sieve bend through an external discharge pipeline. The sieve bend liquid outlet is connected to the backwashing liquid collection tank pipeline.

[0059] The use method of the clogging-preventing uranium in-situ leaching liquid dense fixed bed adsorption tower in this example is the same as that in Example 2, comprising the following steps:

[0060] Step 1, adsorption process, the adsorption original liquid is pumped into the adsorption original liquid inlet at the top of the dense fixed bed adsorption tower through the adsorption original liquid pump, flows through the resin bed layer, and the adsorption tail liquid flows out through the adsorption tail liquid outlet at the bottom of the dense fixed bed adsorption tower.

[0061] Step 2, backwashing process, when it is necessary to remove the flocculent mud trapped by the resin, the pipeline for the adsorption original liquid to enter the dense fixed bed adsorption tower is changed, and the adsorption original liquid is changed to flow in through the backwashing liquid inlet. Part of the adsorption original liquid flows downward through the resin bed layer to perform normal adsorption operation, and the adsorption tail liquid flows out through the adsorption tail liquid outlet at the bottom of the dense fixed bed adsorption tower. The other part of the adsorption original liquid flows upward to fluidize the resin bed layer located above the backwashing liquid inlet to perform backwashing, and the backwashing liquid and the flocculent mud flow out through the backwashing liquid outlet. After the backwashing liquid is discharged, a small amount of resin that may be discharged is first intercepted by the sieve bend, and then returned to the adsorption original liquid storage tank after clarification by the backwashing liquid collection tank.

[0062] The flow rate of the adsorption original liquid flowing in from the adsorption original liquid inlet in the adsorption process is the same as the flow rate of the adsorption original liquid flowing in from the backwashing liquid inlet in the backwashing process.

[0063] By controlling the flow rate of the backwash liquid flowing out of the backwash liquid outlet, the resin bed layer fluidization expansion height of the upper part of the backwash liquid inlet is controlled, the resin interface is ensured to be lower than the backwash liquid outlet, and the resin is prevented from flowing out of the dense fixed bed adsorption tower.

[0064] It is found through research that the bed layer blockage of the dense fixed bed adsorption tower is mainly concentrated in the upper part of the bed layer within 0.3 m, and there is little floc in the lower part, so the key to the bed layer unblocking is to remove the floc trapped in the upper part of the bed layer within 0.3 m. The technical scheme of the present application adopts the scheme of backwashing the upper part of the bed layer within 0.3 m to remove the floc. During normal adsorption, the adsorption raw liquid enters from the top of the tower, and when the bed layer needs to be unblocked, the adsorption raw liquid enters from the backwash liquid inlet at a position 0.5 m below the top of the bed layer. The resin above the backwash liquid inlet is in a fluidized state, and the floc rises higher due to the density difference. The floc can be washed out by setting a backwash water outlet at a suitable position.

[0065] In addition, when the bed layer needs to be unblocked, the adsorption raw liquid enters from the backwash water inlet, and the flow rate is the same as that during normal adsorption and remains unchanged. The adsorption raw liquid entering the tower is divided into two streams from the perspective of the flow direction. One stream continues to flow downward for adsorption, and the other stream flows upward to backwash the resin bed layer with a thickness of 0.5 m at the top. The backwash water flows out of the backwash water outlet. By controlling the flow rate of the backwash water outlet, the resin bed layer expansion height can be controlled, the resin interface is ensured to be lower than the backwash water outlet, and the resin is prevented from being washed out. Moreover, the floc can be smoothly discharged. After the backwash water is discharged, a small amount of resin that may be discharged is first intercepted by an arc screen, and then returned to the collecting tank after clarification in a clarification tank.

[0066] Example 4

[0067] A kind of anti-clogging uranium ore in-situ leaching liquid dense fixed bed adsorption tower, the dense fixed bed adsorption tower includes tower body and resin bed layer arranged in the inside of tower body;The tower body diameter is 6 m, the height of straight cylinder section is 6 m, and the inside is filled with resin bed layer height 4 m;

[0068] The tower body is provided with adsorption raw liquid inlet, adsorption tail liquid outlet, backwash liquid inlet and backwash liquid outlet;

[0069] The adsorption raw liquid inlet is arranged at the top of the tower body, and the adsorption tail liquid outlet is arranged at the bottom of the tower body and connected with the bottom of the tower body through a wire-wound tube filter;

[0070] The backwash liquid inlet is arranged at the side wall of the tower body, at a position 0.5 m below the top of the resin bed layer;The backwash liquid inlet is provided with 11 (k23-k33), and the backwash liquid inlet is connected with a liquid distribution pipe The liquid distribution pipes are arranged in parallel and spaced apart by 0.5m; the liquid distribution pipes extend out of the tower body and are connected to transparent pipes and ball valves (DN32); if resin or other impurities are observed in the pipes, the valves can be opened to discharge them (see Figure 4 , Figure 5 ). The liquid distribution holes in the walls of the pipes are arranged in horizontal, oblique downward and downward directions, and the hole diameters The number of holes is determined according to the horizontal cross-sectional area of each pipe. In the embodiment, the B-B cross-sectional view shows the specific implementation of the liquid distribution holes arranged in horizontal and downward directions, and the liquid distribution holes are small holes with a diameter of 4mm (see Figure 6 ). In the embodiment, the C-C cross-sectional view shows the specific implementation of the liquid distribution holes arranged in oblique downward 45° and downward directions, and the liquid distribution holes are small holes with a diameter of 4mm (see Figure 7 ). The arrangement of multiple backwash liquid inlets and the connection of liquid distribution pipes to each backwash liquid inlet can achieve uniform liquid distribution in a large-diameter adsorption tower, and can also achieve the arrangement of as few support members as possible in the inner wall of the tower body, thereby ensuring the integrity of the anticorrosive lining in the tower body, improving the anticorrosive effect and service life.

[0071] The backwash liquid outlet is arranged at a position 1m above the top of the resin bed layer, and 16 backwash liquid outlets are arranged uniformly along the central part of the circumference of the tower body. The backwash liquid outlets in the 45°, 135°, 225° and 315° directions are connected to inner extension liquid pipes in the tower body, and the inner extension liquid pipes are arranged along the radial direction of the cross section of the tower body The inner extension liquid pipes in the tower body can ensure smooth liquid outflow in the central region of the tower body, and the effect is more obvious when the diameter of the tower is large.

[0072] For ease of description, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to describe the relationship of one element or feature to another element or feature as shown in the drawings. It should be understood that, in addition to the orientation shown in the drawings, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the drawings is inverted, the element described as being "below" other elements or features will be positioned "above" the other elements or features. Therefore, the exemplary term "below" can include both upward and downward orientations. The device can be positioned in other ways (rotated 90 degrees or positioned in other orientations), and the spatial relative description used herein can be interpreted accordingly.

[0073] Also, the term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0074] While the application has been illustrated and described in detail in the foregoing description, it should be understood that the application is not limited to the particular embodiments disclosed. Without departing from the spirit and scope of the application, many modifications and variations of the details, materials, and arrangements of parts, can be made, and equivalents are contemplated, in the scope of the present application. It is therefore requested to protect all changes and modifications that come within the spirit and scope of the present application.

Claims

1. A dense fixed-bed adsorption tower for uranium ore leaching solution to prevent clogging, characterized in that, The dense fixed-bed adsorption tower includes a tower body and a resin bed disposed inside the tower body; The tower body is equipped with an adsorption raw liquid inlet, an adsorption tail liquid outlet, a backwash liquid inlet, and a backwash liquid outlet. The adsorption raw liquid inlet is located at the top of the tower body, and the adsorption tail liquid outlet is located at the bottom of the tower body; The backwash liquid inlet is located on the side wall of the tower body; The backwash liquid outlet is located between the adsorbent stock solution inlet and the backwash liquid inlet; The backwash liquid inlet is located on the side wall of the tower body, at a position 0.2 to 0.8 meters below the top of the resin bed; the backwash liquid outlet is located at a position 0.4 to 1.6 meters above the top of the resin bed. The backwash liquid inlet is provided with multiple inlets, each of which is connected to a liquid distribution pipe, and the liquid distribution pipes are arranged in parallel and at equal intervals. Each of the liquid distribution pipes has a liquid distribution hole on its wall. The opening direction of the liquid distribution hole includes: horizontal, obliquely downward, and downward. The diameter of the liquid distribution hole is... 3mm~ The diameter is 5mm, and the number of holes is determined based on the cross-sectional area of ​​each pipe.

2. The anti-clogging uranium ore leaching solution dense fixed-bed adsorption tower according to claim 1, characterized in that, The backwash liquid outlets are provided in multiple locations and are evenly distributed along the circumference of the tower body; each backwash liquid outlet is connected to an inner protruding liquid pipe in the direction inside the tower, and the inner protruding liquid pipe is arranged radially along the cross-section of the tower body.

3. A dense fixed-bed adsorption system for uranium ore leaching solution to prevent clogging, characterized in that, Includes adsorption stock pump, compacted fixed bed adsorption tower, filter screen, and backwash liquid collection tank; The dense fixed-bed adsorption tower is the anti-clogging uranium ore leaching liquid dense fixed-bed adsorption tower as described in any one of claims 1 to 2; The adsorption stock solution pump is connected to the adsorption stock solution inlet and the backwash liquid inlet of the compacted fixed bed adsorption tower via pipelines; the backwash liquid outlet of the compacted fixed bed adsorption tower is connected to the filter screen via an external discharge pipeline; and the liquid outlet of the filter screen is connected to the backwash liquid collection tank via a pipeline.

4. The anti-clogging uranium ore leaching solution dense fixed bed adsorption system according to claim 3, characterized in that, The backwash liquid outlet is connected to a pipe with a flow rate regulating valve, and the filter screen is specifically an arc-shaped screen.

5. A method for using a closed-bed adsorption tower for uranium ore leaching solution to prevent clogging, characterized in that, The anti-clogging uranium ore leaching solution dense fixed bed adsorption tower is the anti-clogging uranium ore leaching solution dense fixed bed adsorption tower according to any one of claims 1 to 2, comprising the following steps: Step 1, adsorption process: The adsorption solution flows in from the adsorption solution inlet at the top of the compacted fixed bed adsorption tower, flows through the resin bed, and the adsorption tail liquid flows out through the adsorption tail liquid outlet at the bottom of the compacted fixed bed adsorption tower. Step 2, backwashing process: When it is necessary to remove the flocculent sludge trapped by the resin, the pipeline into the compacted fixed bed adsorption tower is changed, and the adsorption solution flows in through the backwash liquid inlet. Part of the adsorption solution flows downward through the resin bed for conventional adsorption operation, and the adsorption tail liquid flows out through the adsorption tail liquid outlet at the bottom of the compacted fixed bed adsorption tower. The other part of the adsorption solution flows upward to perform fluidized backwashing on the resin bed located above the backwash liquid inlet, and the backwash liquid and flocculent sludge flow out through the backwash liquid outlet.

6. The method of using the anti-clogging uranium ore leaching solution dense fixed bed adsorption tower according to claim 5, characterized in that, By controlling the flow rate of the backwash liquid from the backwash liquid outlet, the fluidization expansion height of the resin bed above the backwash liquid inlet is controlled, ensuring that the resin interface is lower than the backwash liquid outlet and preventing resin from flowing out of the compacted fixed bed adsorption tower; the flow rate of the adsorbent stock solution flowing in from the adsorbent stock solution inlet during the adsorption process is the same as the flow rate of the adsorbent stock solution flowing in from the backwash liquid inlet during the backwash process.

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