A device for filtering organic sediments and separating oil and water in a highly radioactive storage tank

Abstract

This invention discloses a device for filtering organic deposits and separating oil and water in a high-radioactivity storage tank, comprising a solid-liquid filtration system and an oil-water separation system. The solid-liquid filtration system includes a filter chamber with a flip-top at the port and a filter bag inside, and an inlet pipe and a outlet pipe respectively connected to the filter chamber. The oil-water separation system includes an oil-water separation tank connected to the outlet pipe, a filter element disposed inside the oil-water separation tank dividing it into a left and right chamber, an oil collecting bag connected to the right chamber and containing a float ball with a density between water and oil, an oil collecting bag level gauge and a float ball level gauge disposed on the oil collecting bag, an oil drain pipe connected to the upper end of the oil collecting bag, and a drain pipe connected to the lower end of the right chamber of the oil-water separation tank. This invention can achieve the filtration of organic deposits and oil-water separation in a high-radioactivity storage tank, reducing the radiation dose to workers.

Description

Technical Field

[0001] This invention relates to the field of radioactive waste treatment technology, specifically to a device for filtering organic deposits and separating oil and water in a highly radioactive storage tank. Background Technology

[0002] In recent years, nuclear technology has attracted attention from various countries. During the operation and decommissioning of nuclear facilities, a large amount of radioactive waste is inevitably generated, such as gaseous waste, liquid waste, and solid waste. Liquid waste is often stored in large tanks. When treating highly radioactive organic deposits, solid-liquid separation and oil-water separation are usually required. Currently, there are no advanced methods internationally for filtering highly radioactive organic deposits and separating oil and water. The purpose of this invention is to provide a device and method for filtering highly radioactive organic deposits and separating oil and water to achieve solid-liquid and oil-water separation of organic deposits. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for filtering organic deposits and separating oil and water in a highly radioactive storage tank, which can filter organic deposits and separate oil and water in a highly radioactive storage tank, thereby reducing the radiation dose to workers.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A device for filtering organic deposits and separating oil and water in a highly radioactive storage tank includes a solid-liquid filtration system and an oil-water separation system;

[0006] The oil-water separation system includes an oil-water separation tank for storing organic liquid, a filter element disposed inside the oil-water separation tank and dividing the oil-water separation tank into a left chamber and a right chamber, an oil collection bag connected to the right chamber and containing a float ball with a density between water and oil, an oil collection bag level gauge disposed on the oil collection bag to display the liquid level inside the oil collection bag, a float ball level gauge disposed on the oil collection bag to display the liquid level of the float ball, an oil drain pipe connected to the upper end of the oil collection bag, and a drainage pipe connected to the lower end of the right chamber of the oil-water separation tank.

[0007] Furthermore, the solid-liquid filtration system includes a filter chamber with a flip-top at the port and a filter bag inside, as well as a feed pipe and a discharge pipe respectively connected to the filter chamber; the filter bag divides the filter chamber into an upper solid phase chamber and a lower filter bag chamber, and the filter chamber is equipped with a differential pressure transmitter that can display the pressure difference between the solid phase chamber and the filter bag chamber; the flip-top is equipped with a clamping mechanism that can seal the flip-top with the port of the filter chamber; the discharge pipe is equipped with an electric valve KV03 and is connected to the upper end of the oil-water separation storage tank.

[0008] Furthermore, the filter chamber is also connected to a backwashing pipe for rinsing the filter bag, a compressed air pipe for introducing compressed air into the filter chamber to squeeze out the water in the filter bag, and a venting pipe for discharging gas from the filter chamber; electric valves KV07, KV05, and KV08 are respectively installed on the backwashing pipe, the compressed air pipe, and the venting pipe; the upper end of the oil collection bag is connected to the venting pipe through a pipe equipped with an electric valve KV09.

[0009] Furthermore, the pressing mechanism includes four cylinders: the first cylinder controls the opening and closing of the flip cover, and the second, third, and fourth cylinders control the pressing and releasing of the flip cover.

[0010] Furthermore, the filter bag is a 25μm filter bag.

[0011] Furthermore, the feed pipe is equipped with an electric valve KV01 and a self-priming pump, and is connected to an organic sediment storage tank.

[0012] Furthermore, an electric valve KV10 and an electric valve KV04 are respectively installed on the oil drain pipe and the water drain pipe; a sampling pipe is also connected to the water drain pipe.

[0013] Furthermore, a reflux pipe is connected between the lower end of the filter chamber and the organic sediment storage tank, and an electric valve KV18 is installed on the reflux pipe.

[0014] Furthermore, the lower ends of the left and right chambers of the oil-water separation tank are connected to the drain pipe through pipes equipped with electric valves KV11 and KV12, respectively.

[0015] Furthermore, the method of using the organic sediment filtration and oil-water separation device in a highly radioactive storage tank provided by the present invention is as follows:

[0016] S1: Confirm that all electric valves except for the electric valves KV11 and KV12 on the drain pipe are closed, and the equipment is in a stopped state; confirm that the filter bag has been installed or replaced.

[0017] S2: Open electric valves KV01, KV03, and KV18. The equipment enters the operating mode and starts the self-priming pump to perform solid-liquid separation.

[0018] S3: After solid-liquid separation, the organic liquid enters the oil-water separation tank. The organic liquid is filtered again by the filter element and stored in the left and right chambers of the oil-water separation tank. When the oil-water separation tank is full of organic liquid, the organic liquid flows into the oil collection bag from the upper end of the right chamber. When the liquid level displayed by the oil collection bag level gauge is two-thirds of the height of the oil collection bag, and the liquid level displayed by the float level gauge is one-third of the height of the oil collection bag, observe for half a minute. If the liquid level displayed by the float level gauge does not change, then open the electric valve KV10 to drain the oil through the drain pipe. When the liquid level displayed by the float level gauge reaches two-thirds of the height of the oil collection bag, stop draining the oil.

[0019] When the liquid level displayed by both the oil collection tank level gauge and the float level gauge is at two-thirds of the height of the oil collection tank, open the electric valve KV04 to drain the water through the drain pipe.

[0020] S4: During the oil-water separation process, samples can be taken from the sampling pipe for subsequent testing of the discharged water.

[0021] S5: When processing the last tank of organic sediment, stop sampling, open electric valves KV11 and KV12, and drain all the solution in the device through the drain pipe.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The present invention achieves dual filtration of organic matter deposition through the filter chamber and filter element, which can effectively achieve solid-liquid separation; after solid-liquid separation, the organic liquid enters the oil-water separation tank for oil-water separation, and the oil-water separation is achieved in the oil collection bag, which can effectively separate the oil and water in the organic liquid.

[0024] (2) By operating each electric valve, the present invention can realize the solid-liquid separation and oil-water separation of organic deposits, which greatly reduces the radiation dose to workers. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the present invention;

[0026] Figure 2 This is a structural diagram of the solid-liquid filtration system of the present invention;

[0027] Figure 3 This is a structural diagram of the oil-water separation system of the present invention.

[0028] The names corresponding to the reference numerals in the attached figures are as follows:

[0029] 1-Self-priming pump, 2-Filter bag, 3-Oil-water separator tank, 4-Compressed air pipeline, 5-Backwash pipeline, 6-Vent pipeline, 7-Differential pressure transmitter, 8-Flip cover, 9-Organic sediment storage tank, 10-Filter chamber, 11-Infeed pipe, 12-Discharge pipe, 13-Filter element, 14-Oil collection bag, 15-Oil collection bag level gauge, 16-Float level gauge, 17-Oil discharge pipeline, 18-Drainage pipeline, 19-Recirculation pipeline, 20-Drainage pipeline, 21-Sampling pipeline. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0031] like Figures 1-3 As shown, the present invention provides a device for filtering organic deposits and separating oil and water in a highly radioactive storage tank, including a solid-liquid filtration system and an oil-water separation system.

[0032] The solid-liquid filtration system includes a filter chamber 10 with a flip cover 8 at the port and a 25μm filter bag 2 inside, as well as a feed pipe 11 and a discharge pipe 12 connected to the filter chamber 10 respectively; the filter bag 2 divides the filter chamber 10 into an upper solid phase chamber and a lower filter bag chamber, and the filter chamber 10 is equipped with a differential pressure transmitter 7 that can display the pressure difference between the solid phase chamber and the filter bag chamber; the flip cover 8 is equipped with a clamping mechanism that can seal the flip cover 8 with the port of the filter chamber 10; the discharge pipe 12 is equipped with an electric valve KV03; in addition, the filter chamber 10 is also connected to a backwash pipe 5 for rinsing the filter bag 2, a compressed air pipe 4 for introducing compressed air into the filter chamber 10 to dehydrate the water in the filter bag 2, and a vent pipe 6 for venting the gas in the filter chamber 10; electric valves KV07, KV05, and KV08 are respectively installed on the backwash pipe 5, the compressed air pipe 4, and the vent pipe 6. Organic sediment enters the filter chamber 10 through the feed pipe 11 and is filtered in the filter bag 2 to achieve solid-liquid separation. The filtered organic liquid enters the oil-water separation storage tank 3 through the discharge pipe 12. When the differential pressure transmitter 7 installed on the filter chamber 10 shows a differential pressure greater than 120 MPa, it can be determined that the filter bag 2 needs to be replaced. Open the electric valve KV07 and introduce backwash water through the backwash pipe 5. Compressed air is used to squeeze the water out of the filter bag 2, so that no water drips out of the filter bag, thus meeting the conditions for replacing the filter bag 2.

[0033] The clamping mechanism that seals the flip cover 8 with the port of the filter chamber 10 includes four cylinders. The first cylinder controls the opening and closing of the flip cover 8, and the second, third, and fourth cylinders control the clamping and loosening of the flip cover 8. By controlling the four cylinders, the flip cover 8 is opened, the filter bag 2 is replaced, the replaced filter bag 2 is temporarily stored in a lead bucket, and after the new filter bag 2 is placed, the flip cover is closed and the cylinders are activated to seal the flip cover 8 with the port of the filter chamber 10.

[0034] The oil-water separation system includes an oil-water separation tank 3 connected to the discharge pipe 12, a filter element installed inside the oil-water separation tank 3 and dividing the oil-water separation tank 3 into a left chamber and a right chamber, an oil collection bag 14 connected to the right chamber and containing a float ball with a density between water and oil, an oil collection bag level gauge 15 installed on the oil collection bag 14 to display the liquid level inside the oil collection bag 14, a float ball level gauge 16 installed on the oil collection bag 14 to display the liquid level of the float ball, an oil discharge pipe 17 connected to the upper end of the oil collection bag 14, and a drainage pipe 18 connected to the lower end of the right chamber of the oil-water separation tank 3; the upper end of the oil collection bag 14 is connected to the vent pipe 6 through a pipe equipped with an electric valve KV09.

[0035] An electric valve KV01 is installed on the feed pipe 11, and electric valves KV10 and KV04 are installed on the oil discharge pipe 17 and the drain pipe 18, respectively; a sampling pipe 21 is also connected to the drain pipe 18. The sampling pipe 21 is used to sample the discharged water during the oil-water separation process, and the sampled water can be used for subsequent process testing.

[0036] The organic sediment to be treated is stored in an organic sediment storage tank 9, and is transported to the filter chamber 10 by a self-priming pump 1 installed on the feed pipe 11. The filtration and oil-water separation device provided in this embodiment also includes a return pipe 19 for connecting the lower end of the filter chamber 10 and the organic sediment storage tank 9, and an electric valve KV18 is installed on the return pipe 19.

[0037] In this embodiment, the lower ends of the left and right chambers of the oil-water separation storage tank 3 are connected to the drain pipe 20 via pipes equipped with electric valves KV11 and KV12, respectively. When the last tank of organic sediment is processed, electric valves KV11 and KV12 are opened, and all the solution in the device is discharged through the drain pipe 20.

[0038] The device provided in this embodiment is used as follows:

[0039] S1: Confirm that all electric valves except for the electric valves KV11 and KV12 on the drain pipe 20 are closed, and the equipment is in a stopped state; confirm that the filter bag 2 has been installed or replaced.

[0040] S2: Open electric valves KV01, KV03, and KV18. The equipment enters the operating mode and starts the self-priming pump to perform solid-liquid separation.

[0041] S3: After solid-liquid separation, the organic liquid enters the oil-water separation storage tank 3. The organic liquid is filtered again by the filter element 13. The organic liquid is stored in the left and right chambers of the oil-water separation storage tank 3. When the oil-water separation storage tank 3 is full of organic liquid, the organic liquid flows into the oil collection bag 14 from the upper end of the right chamber. When the liquid level displayed by the oil collection bag level gauge 15 is two-thirds of the height of the oil collection bag 14, and the liquid level displayed by the float level gauge 16 is one-third of the height of the oil collection bag 14, observe for half a minute. If the liquid level displayed by the float level gauge 16 does not change, then open the electric valve KV10 and drain the oil through the oil drain pipe 17. When the liquid level displayed by the float level gauge 16 reaches two-thirds of the height of the oil collection bag 14, stop draining the oil.

[0042] When the liquid levels displayed by the oil collection tank level gauge 15 and the float level gauge 16 are both at two-thirds of the height of the oil collection tank 14, open the electric valve KV04 to drain the water through the drain pipe 18.

[0043] S4: During the oil-water separation process, samples can be taken from the sampling pipe 21 for subsequent testing of the discharged water.

[0044] S5: When the last tank of organic sediment is processed, stop sampling, open electric valves KV11 and KV12, and drain all the solution in the device through drain pipe 20.

[0045] The above embodiments are merely one of the preferred embodiments of the present invention and should not be used to limit the scope of protection of the present invention. Any modifications or refinements made to the main design concept and spirit of the present invention that are not of substantial significance, but solve the same technical problem as the present invention, should be included within the scope of protection of the present invention.

Claims

1. A device for filtering organic sediments and separating oil and water in a highly radioactive storage tank, characterized in that, Includes solid-liquid filtration systems and oil-water separation systems; The oil-water separation system includes an oil-water separation tank (3) for storing organic liquid, a filter element disposed inside the oil-water separation tank (3) and dividing the oil-water separation tank (3) into a left chamber and a right chamber, an oil collection bag (14) connected to the right chamber and containing a float ball with a density between water and oil, an oil collection bag level gauge (15) disposed on the oil collection bag (14) to display the liquid level inside the oil collection bag (14), a float ball level gauge (16) disposed on the oil collection bag (14) to display the liquid level of the float ball, an oil drain pipe (17) connected to the upper end of the oil collection bag (14), and a drain pipe (18) connected to the lower end of the right chamber of the oil-water separation tank (3). The solid-liquid filtration system includes a filter chamber (10) with a flip cover (8) at the port and a filter bag (2) inside, and a feed pipe (11) and a discharge pipe (12) connected to the filter chamber (10) respectively; the filter bag (2) divides the filter chamber (10) into an upper solid phase chamber and a lower filter bag chamber, and the filter chamber (10) is provided with a differential pressure transmitter (7) that can display the pressure difference between the solid phase chamber and the filter bag chamber; the flip cover (8) is provided with a clamping mechanism that can seal the flip cover (8) with the port of the filter chamber (10); the discharge pipe (12) is provided with an electric valve KV03 and is connected to the upper end of the oil-water separation storage tank (3).

2. The device for filtering organic sediments and separating oil and water in a highly radioactive storage tank according to claim 1, characterized in that, The filter chamber (10) is also connected to a backwash pipe (5) for rinsing the filter bag (2), a compressed air pipe (4) for passing compressed air into the filter chamber (10) to squeeze out the water in the filter bag (2), and a vent pipe (6) for discharging the gas in the filter chamber (10); electric valves KV07, KV05, and KV08 are respectively installed on the backwash pipe (5), the compressed air pipe (4), and the vent pipe (6); the upper end of the oil collection bag (14) is connected to the vent pipe (6) through a pipe equipped with an electric valve KV09.

3. The device for filtering organic sediments and separating oil and water in a highly radioactive storage tank according to claim 2, characterized in that, The pressing mechanism includes four cylinders. The first cylinder is used to control the opening and closing of the flip cover (8), and the second, third and fourth cylinders are used to control the pressing and releasing of the flip cover (8).

4. The device for filtering organic sediments and separating oil and water in a highly radioactive storage tank according to claim 3, characterized in that, The filter bag (2) is a 25μm filter bag.

5. The device for filtering organic sediments and separating oil and water in a highly radioactive storage tank according to claim 4, characterized in that, The feed pipe (11) is equipped with an electric valve KV01 and a self-priming pump (1), and is connected to the organic sediment storage tank (9).

6. The device for filtering organic deposits and separating oil and water in a highly radioactive storage tank according to claim 5, characterized in that, Electric valves KV10 and KV04 are respectively installed on the oil drain pipe (17) and the drainage pipe (18); a sampling pipe (21) is also connected to the drainage pipe (18).

7. The device for filtering organic sediments and separating oil and water in a highly radioactive storage tank according to claim 6, characterized in that, A return pipe (19) is connected between the lower end of the filter chamber (10) and the organic sediment storage tank (9), and an electric valve KV18 is installed on the return pipe (19).

8. The device for filtering organic sediments and separating oil and water in a highly radioactive storage tank according to claim 7, characterized in that, The lower ends of the left and right chambers of the oil-water separation storage tank (3) are connected to the drain pipe (20) through pipes equipped with electric valves KV11 and KV12, respectively.

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