TWI425526B - A method for filtration and separation of waste resin contaminated from high radioactive uranium powder and device thereof - Google Patents

Description

Filtration separation method and device for waste resin high-radioactive uranium powder

The invention relates to a filtering and separating method and a device for a waste resin high-radioactive uranium powder, in particular to a method and a device for the simple processing and convenient operation, which can effectively improve the waste resin after the nuclear facility related water purification treatment.

It is used as a waste resin after the treatment of water purification in nuclear facilities. Because it is a high-level radioactive waste, most of it is stored in the pool to block its high radioactivity. When the nuclear facility is decommissioned, it needs to be cleaned up in conjunction with the decommissioning pool. The waste resin in the pool will be removed and the high-radioactive uranium powder in the pool will be separated and collected to reduce the activity of the waste resin and convert it into low-level radioactive waste for subsequent treatment.

Traditionally used waste resin to filter and separate its high-radioactive uranium powder. Because there is no experience in pool cleaning of nuclear facilities in China, it is necessary to refer to foreign treatment experience, but it is necessary to consider operating in such an environment for a long time. There is still the possibility of a large amount of radiation dose accumulating, causing harm to the human body.

The more complete method of filtering and separating the high-radioactive uranium powder by using waste resin is to use the remote separation water remote separation equipment by the staff to operate the separation and filtering equipment outside the radiation area, which is extremely cumbersome in operation control. And the underwater photography system must be used to complete the filtering operation, which is slower in use and inefficient in work. Although the operation is better, the worker can avoid the operation of the radiation area and accumulate the radiation dose, but the equipment is expensive and has practical application. The inconvenience and lack of it; therefore, how to simplify the operating procedures, improve work efficiency, and avoid excessive accumulation of radiation dose by staff in a simple way and at low cost is an important issue to be considered.

The method and device for filtering and separating high-radioactive uranium powder by using waste resin in view of the above The above disadvantages, the inventors have studied the improvement of these shortcomings, and finally the invention has been produced.

The main object of the present invention is to provide a method for filtering and separating waste resin high-radioactive uranium powder, which can effectively simplify the overall operation procedure, improve work efficiency, and expose the radiation of the worker, and can also be within the control range.

Another object of the present invention is to provide a filter separation device for waste resin high-radioactive uranium powder, which is extremely simple in structure, does not require excessive equipment investment, and can effectively reduce operating costs.

In order to achieve the above objectives and effects, the technical means adopted include: a method for filtering and separating high-radioactive uranium powder of waste resin, comprising at least one step of "collecting high-activity waste resin by temporary storage tank", which is a The temporary storage tank of water is used for accommodating high-activity waste resin; the step of “moving waste resin to uranium powder filter box” is to suck the waste resin in the temporary storage tank into a uranium powder filter box by using a sink pump; A step of “moving the uranium powder filter tank into the ultrasonic cleaning machine in the water” is to lift the uranium powder filter box to the underwater ultrasonic cleaning machine by a crane; a “high pressure cleaning uranium powder filter box” step, The water gun is moved back and forth around the uranium powder filter box by a high-pressure cleaner to clean the waste resin inside, and the uranium powder contained therein is washed away by high-pressure water flow; an "ultrasonic cleaning uranium powder filter box" step The ultrasonic cleaning machine is activated, and the uranium powder filter box is cleaned by ultrasonic vibration to allow the uranium powder contained in the waste resin to be oozing out from the uranium powder filter box; Uranium powder is pumped to uranium powder In the “equipment” step, the drainage of the ultrasonic cleaning machine is started, and the cleaning water (containing precipitated uranium powder) in the ultrasonic cleaning machine is discharged into an external uranium powder collecting device; The "clear" judgment step is to observe whether the cleaning water in the uranium powder filter box is clear to confirm whether the activity of the waste resin after the cleaning has been lowered to the treatment standard, and if not, it indicates that the uranium powder still has excessive residue. Re-execute The "high-pressure cleaning uranium powder filter box" step and the following steps, if yes, it means that the residue of the uranium powder has dropped below a certain level, then the next step can be continued; The step of collecting the waste resin after washing is to use a submerged pump to pump the cleaned waste resin into the external waste resin tank for storage for subsequent processing.

A filter separation device for waste resin high-radioactive uranium powder, comprising at least: a temporary storage tank containing water for temporarily accommodating waste resin containing uranium powder; and a uranium powder filter box for filtering waste resin Uranium powder; a submersible pump for pumping waste resin from the temporary storage tank into the uranium powder filter tank; a high pressure cleaner with a water gun that can be inserted into the uranium powder filter tank to clean the waste resin with a high pressure water column An ultrasonic cleaning machine in the water can generate ultrasonic waves for cleaning the waste resin, so that the uranium powder contained therein can be filtered out and precipitated through the uranium powder filter box.

In order to achieve a more specific understanding of the above objects, effects and features of the present invention, the following figures are illustrated as follows:

1 is a flow chart showing the operation of the present invention. As shown in the figure, the main steps of the present invention include: step S11 "collecting high-activity waste resin in a temporary storage tank", and step S12 "moving waste resin to a uranium powder filter box" Step S13 "Moving the uranium powder filter box into the ultrasonic cleaning machine in the water", step S14 "High-pressure cleaning uranium powder filter box", step S15 "Ultra-wave cleaning uranium powder filter box", and step S16 "Using ultrasonic waves in the water" The uranium powder in the washing machine is pumped into the uranium powder collecting device, step S17 "whether the uranium powder filter tank cleaning water is clear", and step S18 "collecting the waste resin after washing in the waste resin tank tank"; In the above, the above steps are explained. First, in step S11, "the high-activity waste resin is collected by the temporary storage tank", the resin tank containing the high-activity waste resin 2 is placed in the crane with a water tank 11 The resin tank is suspended upside down in the temporary storage tank 1, and the waste resin 2 therein is poured into the temporary storage tank 1, and then the resin tank is lifted out of the water surface by a crane, and inserted into the resin tank through a water pipe by a high-pressure cleaner to generate a high pressure. The water column completely rinses out the waste resin 2; the step S12 "moving the waste resin to the uranium powder filter box" is to manually hold the long rod 33 at the side of the pool to draw the suction of the inlet pipe 31 of the sinking water pump 3. The outlet tube 32 of the submersible pump 3 is inserted into a uranium powder filter box 4 which is provided with a slant bottom 43 on the bottom side thereof by a main bracket 41 of a substantially rectangular bone rod The top surface of the uranium powder filter box 4 is provided with a top cover 42. The top cover 42 is provided with a handle 423 for holding the handle, a transparent window 422 and a nozzle 421 which is continuous, and the nozzle 421 The ventilating tube 32 is inserted into the ventilator, and a plurality of slings 411 are further disposed on the main bracket 41 for the external rope 45 to pass through to lift the uranium powder filter box 4, and the top side of the main bracket 41 is removed from the top side. The other part except the cover 42 is combined with a 200-mesh stainless steel mesh 44, and then the submersible pump 3 is activated. The hand-held long rod 33 is moved in the temporary storage tank 1 by pulling the suction port of the inlet pipe 31 of the submersible pump 3 to pump the high-activity waste resin 2 (containing uranium powder) in the temporary storage tank 1 to the uranium powder filter box. 4; Step S13 "Moving the uranium powder filter box into the ultrasonic cleaning machine in the water" is carried out by a crane to hang the uranium powder filter box 4 under water into a water ultrasonic cleaning machine 5, the size of the ultrasonic cleaning machine 5 It is necessary to accommodate the entire uranium powder filter tank 4; step S14 "high pressure cleaning uranium powder filter box" is to start a high pressure cleaner, and the water gun 6 is moved deep into the uranium powder filter box 4 to move back and forth to clean the waste inside. Resin 2, using high-pressure water flow to flush away the uranium powder contained therein (time is about 20 minutes); step S15 "Ultra-wave cleaning uranium powder filter box" is completed after the previous steps are completed, the ultrasonic cleaning machine 5 is activated, and the ultrasonic wave is used The uranium powder filter tank 4 is oscillated and cleaned (about two hours), so that the uranium powder contained in the waste resin 2 can be exuded outward from the stainless steel mesh 44; step S16 "pumping the uranium powder in the ultrasonic cleaning machine in the water to the uranium powder Uranium powder collection equipment The drainage of the ultrasonic cleaning machine 5 is started, and the washing water (containing the precipitated uranium powder) in the ultrasonic cleaning machine 5 is discharged into an external uranium powder collecting device; in step S17, "the uranium powder filter box cleaning water is clear" It is judged whether the cleaning water in the uranium powder filter tank 4 is clear by the window 422 to confirm whether the activity of the waste resin 2 after the cleaning has been lowered to the treatment standard, and if not, it indicates that the uranium powder is still excessive. If it is left, the step S14 "high-pressure cleaning uranium powder filter box" and the following steps are re-executed. If yes, it means that the residue of the uranium powder has dropped below a certain level, then the next step can be continued; S18 "Collecting the waste resin after washing in the waste resin tank" is to manually hold the long rod 33 at the side of the pool, and connect the outlet pipe 32 of the submersible pump 3 to the external waste resin tank pipe joint with a quick joint. The tube 31 is inserted into the uranium powder filter tank 4, and the submerged water pump 3 is activated to pump the cleaned waste resin 2 into the external waste resin tank to be stored for subsequent processing.

In summary, the filtration and separation method of the waste resin high-radiation uranium powder of the present invention and the device thereof can achieve the functions of simplifying the operation procedure, reducing the activity of the used waste resin, and improving the efficiency of the collection of high-radioactive uranium powder. A novel and progressive invention is filed in accordance with the law; however, the above description is only for the preferred embodiment of the present invention, and variations, modifications, and extensions of the technical means and scope of the present invention are Any change or equivalent replacement should also fall within the scope of the patent application of the present invention.

S11‧‧‧Collecting high activity waste resin with temporary storage tank

S12‧‧· Move waste resin to uranium powder filter box

S13‧‧‧ Move the uranium powder filter box to the ultrasonic cleaning machine in the water

S14‧‧‧High-pressure cleaning uranium powder filter box

S15‧‧‧Ultrasonic cleaning uranium powder filter box

S16‧‧‧Put the uranium powder in the ultrasonic ultrasonic cleaner into the uranium powder collection equipment

S17‧‧‧Uranium powder filter tank cleaning water is clear

S18‧‧‧Collected waste resin after cleaning in a waste resin tank

1‧‧‧ temporary storage tank

11‧‧‧ water

2‧‧‧Waste resin

3‧‧‧Sink pump

31‧‧‧Introduction tube

32‧‧‧Extraction tube

33‧‧‧Long pole

4‧‧‧Uranium powder filter box

41‧‧‧Main bracket

411‧‧‧ rings

42‧‧‧Top cover

421‧‧‧ mouth

422‧‧‧Window

423‧‧‧Handle

43‧‧‧ oblique bottom

44‧‧‧Stainless steel mesh

45‧‧‧ rope

5‧‧‧ Ultrasonic cleaning machine

6‧‧‧Water gun

Figure 1 is a flow chart showing the operation of the present invention.

Figure 2 is a perspective view of the uranium powder filter tank of the present invention.

Fig. 3 is a schematic view showing the action of pumping uranium powder waste resin into a uranium powder filter tank by a submersible pump.

Figure 4 is a schematic view showing the action of cleaning and filtering the uranium powder filter tank of the present invention.

S11‧‧‧Collecting high activity waste resin with temporary storage tank

S12‧‧· Move waste resin to uranium powder filter box

S13‧‧‧ Move the uranium powder filter box to the ultrasonic cleaning machine in the water

S14‧‧‧High-pressure cleaning uranium powder filter box

S15‧‧‧Ultrasonic cleaning uranium powder filter box

S16‧‧‧Put the uranium powder in the ultrasonic ultrasonic cleaner into an external uranium powder collection device

S17‧‧‧Uranium powder filter tank cleaning water is clear

S18‧‧‧Collected waste resin after cleaning in a waste resin tank

Claims (7)

The method for filtering and separating waste resin high-radioactive uranium powder comprises at least one step of: collecting a high-activity waste resin by using a temporary storage tank, and adopting a temporary storage tank containing water for accommodating a high-activity waste resin; The step of moving the waste resin to the uranium powder filter box is to suck the waste resin in the temporary storage tank into a uranium powder filter box by a sink pump; “moving the uranium powder filter box into the ultrasonic cleaning machine in the water” In the step, the uranium powder filter box is hoisted into a water ultrasonic cleaning machine by a crane; a "high pressure cleaning uranium powder filter box" step is performed by a high pressure cleaner to penetrate the water gun into the uranium powder filter box. Move back and forth to clean the waste resin inside, and use high-pressure water to flush away the uranium powder contained in it; an "ultrasonic cleaning uranium powder filter box" step is to start the ultrasonic cleaning machine and use the ultrasonic wave to clean it. The uranium powder filter box allows the uranium powder contained in the waste resin to be oozing out from the uranium powder filter box; a step of "pulsing the uranium powder in the ultrasonic cleaning machine into the uranium powder collecting device" is to start the super Ultrasonic cleaning machine that will supersonic The washing water (including precipitated uranium powder) in the washing machine is pumped into an external uranium powder collecting device; a "Uranium powder filter box cleaning water is clear" judgment step, it is observed whether the washing water in the uranium powder filter box is clear To confirm whether the activity of the waste resin after washing has been reduced to the treatment standard. If it is negative, it means that the uranium powder still has excessive residue, and the "high pressure cleaning uranium powder filter box" step and the following each are re-executed. Step, if yes, indicating that the residue of the uranium powder has fallen below a certain level, the next step can be continued; A step of "collecting the waste resin after washing in a waste resin tank" is to use a submersible pump to pump the cleaned waste resin to the external waste resin tank for storage for subsequent processing. The method for filtering and separating waste resin high-radioactive uranium powder according to claim 1, wherein the "high-pressure cleaning uranium powder filter box" step is carried out for 20 minutes. The method for filtering and separating waste resin high-radioactive uranium powder according to claim 1, wherein the "ultrasonic cleaning uranium powder filter box" step is carried out for 2 hours. The method for filtering and separating waste resin high-radioactive uranium powder according to claim 1, wherein the high-activity waste resin is poured out from a resin can, and the inside of the resin can is cleaned by a high-pressure water column using a high-pressure cleaner. It is completely out. A filter separation device for waste resin high-radioactive uranium powder, comprising at least: a temporary storage tank containing water for temporarily accommodating waste resin containing uranium powder; and a uranium powder filter box for filtering waste resin Uranium powder; a submersible pump for drawing waste resin from a temporary storage tank into a uranium powder filter tank, wherein the submerged water pump has an introduction tube and a discharge tube, and the introduction tube system is combined with a long rod In order to facilitate the suction of the inlet of the introduction tube; a high pressure cleaner having a water gun that can be inserted into the uranium powder filter box to clean the waste resin with a high pressure water column; a supersonic cleaning machine in the water can generate ultrasonic waves The waste resin is cleaned so that the uranium powder contained therein can be filtered out and precipitated through the uranium powder filter box. The filter-separating device for waste resin high-radioactive uranium powder according to claim 5, wherein the uranium powder filter box is composed of a main bracket having a substantially rectangular bone rod and a bottom portion on the bottom side thereof, a top cover is arranged on the top surface of the uranium powder filter box, and a transparent window and a cover are arranged on the top cover A stainless steel mesh is bonded to the through-pipe nozzle at a portion other than the top cover on the outer peripheral side of the main bracket. A filter separation device for waste resin high-radioactive uranium powder according to claim 6, wherein a plurality of slings are further disposed on the main support for the external rope to penetrate to lift the uranium powder filter box.