Intelligent metering and automated feeding method for radioactive resin

Abstract

This invention discloses a method for intelligently metering and automatically feeding radioactive resin. The method involves automatically filling a resin constant-volume tank with radioactive resin to a fixed volume; then pressing the radioactive resin from the constant-volume tank into a resin feed tank, which automatically stops when the tank is full; and finally, feeding the resin from the resin feed tank into a reactor for reaction. Compared to existing technologies, this method offers a simpler implementation principle, more accurate metering, remote control and operation, and an intelligent and automated entire process, completely eliminating human contact with radioactive waste. This method achieves a safe, accurate, and reliable, intelligent, and continuous resin feeding process.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and in particular to an intelligent metering and automatic feeding method for radioactive resin. Background Art

[0002] Supercritical fluid engineering technology is currently a highly sought-after cutting-edge technology both domestically and internationally. Its applications range from energy conservation, environmental protection, and low carbon emissions to the treatment of various wastes inaccessible to conventional methods under supercritical conditions. Supercritical water oxidation (SCWO) is a technology that can achieve deep oxidation treatment of a variety of organic wastes. Nuclear power plants generate considerable amounts of organic waste annually during operation, including waste oil, waste resin, and highly concentrated organic waste liquids, which constitute a significant portion of radioactive solid waste. Currently, radioactive organic waste in operating nuclear power plants is typically stored in cement-bound or high-integral shielding containers. This results in poor waste volume reduction and equipment exceeding service life, hindering waste minimization and long-term storage. Research and development of more effective and efficient volume reduction methods are urgently needed. Supercritical water oxidation technology is being applied to the treatment of radioactive organic waste in the nuclear power sector. Because supercritical water is an excellent solvent for both organic matter and oxygen, the oxidation of organic matter can occur in an oxygen-rich homogeneous phase, free from the limitations associated with phase transitions. The resulting oxidation rate is extremely high, achieving highly efficient volume reduction.

[0003] In the engineering application of radioactive organic waste resin in supercritical water oxidation, there is a problem of accurate metering and feeding of radioactive resin. Due to the large particle size of solid resin, it is difficult to accurately meter and automatically feed, and there is also the problem of easy blockage of equipment or pipelines. Therefore, a new method is urgently needed to achieve intelligent metering and automatic feeding. Summary of the Invention

[0004] The present invention carries out intelligent metering and automatic feeding for radioactive resin.

[0005] A method for intelligent metering and automatic feeding of radioactive resin comprises the following steps:

[0006] Step a) The resin in the waste resin storage tank is automatically filled into the resin constant volume tank by opening and closing the electric valve at the bottom of the waste resin storage tank to a fixed volume and quantity. The excess water and gas return to the waste resin storage tank through the overflow and exhaust pipes. After reaching the fixed volume scale, the valve is closed;

[0007] Step b) using a flushing pipeline to press the resin in the resin constant volume tank into the resin feed tank until the resin in the constant volume tank is completely transported, thereby completing the automatic resin filling;

[0008] Step c) after the resin in the resin feed tank is completely fed into the reactor by the flushing pump, the resin feed tank is switched to feed or stop feeding into the reactor to ensure the continuity of feeding;

[0009] Step d) After a resin feed tank has finished feeding, the pressure can be released by opening the overflow and pressure relief valves, and the resin that may be adhering to the filter can be backwashed back to the resin feed tank through the backwash pipe;

[0010] Step e) repeats steps a) to d) to continue automatic material filling to achieve continuous material feeding.

[0011] A radioactive resin intelligent metering and automatic feeding system includes a waste resin storage tank, a resin constant volume tank, a resin feed tank and a reactor connected in sequence. Radioactive resin waste flows from the waste resin storage tank into the resin constant volume tank, the resin feed tank and the reactor in sequence through a pipeline, and finally reacts in the reactor.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. A dedicated resin constant volume tank is used, with wastewater as the conveying medium. Utilizing the principle that resin is heavier than water, the resin in the resin constant volume tank naturally settles to the bottom of the tank and gradually rises to fill the visible window position of the metering tank. At the same time, water is discharged into the raw material tank through the return line. The height position of the window is monitored by remote video, and the volume of the resin is accurately measured. Based on the bulk density, the weight of the resin can be calculated, thus solving the problem of intelligent metering of radioactive organic waste resin in the nuclear field;

[0014] 2. The automatic switch valve at the metering tank outlet and the return line valve are opened, and the resin is added to the resin feed tank by its own weight, so that the resin enters the feed tank completely. At this time, the feed high-pressure water valve is automatically switched to open, and the resin is added to the reactor with high-pressure water, thereby realizing automatic feeding;

[0015] 3. According to the feeding frequency, multiple feeding tanks (2 to N feeding tanks) can be set in parallel, and the resin can be automatically switched between gravity feeding and high-pressure water delivery to achieve continuous resin feeding.

[0016] 4. This method has a simple principle, accurate measurement, remote control and operation, and an intelligent and automated whole process, which completely avoids personnel from contacting radioactive waste and realizes a safe, accurate and reliable intelligent and continuous resin feeding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the intelligent metering and automatic feeding system provided by the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figure 1 As shown, the intelligent metering and automatic feeding method of radioactive resin provided by the present invention includes the following steps:

[0020] 1. Close valves V004 and V005, and open valves V001 and V002. The resin in the waste resin storage tank is automatically filled into the resin constant volume tank. Excess water and gas return to the waste resin storage tank through the overflow and exhaust pipes. After reaching the constant volume scale, valves V001 and V002 are closed. In this step, a dedicated resin constant volume tank is used, and wastewater is used as the conveying medium. Utilizing the principle that resin is heavier than water, the resin in the resin constant volume tank naturally settles to the bottom of the tank and gradually rises to fill the visible window position of the metering tank. At the same time, water is discharged into the raw material tank through the return line. The height position of the window is monitored by remote video to accurately measure the volume of the resin. Based on the bulk density, the weight of the resin can be calculated, thereby solving the problem of intelligent metering of radioactive organic waste resin in the nuclear field.

[0021] 2. Open valves V005, V006 (or V008), V007, and V009, and close valves V014, V015, V018, and V019; open valve V004, and use the flushing pipeline to press the resin in the resin constant volume tank into the resin feed tank until all the resin in the constant volume tank is transported, then close valves V004 and V005 to complete the resin filling. Resin feed tank 1 and tank 2 can be switched for filling according to usage to ensure the continuity of material transportation; in this step, the automatic switch valve at the metering tank outlet is opened and the automatic switch valve on the return line is opened, and the resin is fully added to the resin feed tank by its own weight, so that the resin completely enters the feed tank. At this time, the feed high-pressure water valve is automatically switched to open, and high-pressure water is used to add all the resin to the reactor, thereby realizing automatic feeding;

[0022] 3. After the resin in the resin feed tank 1 is completely fed into the reactor by the flushing pump, the resin feed tank can be switched on or off to ensure the continuity of feeding by switching valves V014, V015, V018, and V019. According to the feeding frequency, multiple feed tanks (2 to N feed tanks) can be set in parallel to automatically switch between gravity feeding and high-pressure water delivery of resin, thereby achieving continuous resin feeding.

[0023] 4. When a resin feed tank has finished feeding, the pressure can be released by opening the overflow and pressure relief valves, and the resin that may be adhering to the filter can be backwashed back to the resin feed tank through the backwash pipe;

[0024] 5. Repeat steps 1 and 2 to continue filling the material.

[0025] This method has simple implementation principle, accurate measurement, remote control and operation, intelligent and automated whole process, completely avoids personnel contact with radioactive waste, and realizes a safe, accurate and reliable intelligent and continuous resin feeding process.

[0026] The system, which utilizes the aforementioned intelligent metering and automated feeding method for radioactive resin, consists of a sequentially connected waste resin storage tank, a resin constant volume tank, a resin feed tank, and a reactor. Radioactive resin waste flows from the waste resin storage tank through pipes into the constant volume tank, the resin feed tank, and the reactor, where it reacts. This fully automated system reduces manual intervention and prevents radiation exposure.

[0027] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed above with reference to the preferred embodiment, it is not intended to limit the present invention. Therefore, any simple modifications, equivalent variations, and modifications to the above embodiment that do not depart from the technical solution of the present invention and are based on the technical essence of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A method for intelligent metering and automatic feeding of radioactive resin, characterized in that: The steps include: Step a) The radioactive resin is automatically filled into the resin constant volume tank to a fixed volume, and the excess water and gas are returned to the waste resin storage tank through the overflow and exhaust pipes; Step b) pressing the radioactive resin in the resin constant volume tank in step a) into the resin feed tank using a flushing pipeline, and automatically stopping the pressing of the radioactive resin when the tank is full; Step c) feeding the resin in the resin feed tank in step b) into a reactor to react; Step e) repeating steps a) to c).

2. The intelligent metering and automated feeding method for radioactive resin according to claim 1, characterized in that: Step a) specifically includes: the resin in the waste resin storage tank is automatically filled into the resin constant volume tank by opening and closing the electric valve at the bottom of the waste resin storage tank, and the valve is closed after the constant volume scale is reached.

3. The intelligent metering and automated feeding method for radioactive resin according to claim 1, characterized in that: Step b) specifically comprises: pressing the resin in the resin constant volume tank into the resin feed tank until the resin in the constant volume tank is completely transported, thereby completing the automatic filling of the resin.

4. The intelligent metering and automated feeding method for radioactive resin according to claim 1, characterized in that: Step c) is specifically as follows: after the resin in the resin feed tank is completely fed into the reactor by the flushing pump, the resin feed tank is switched to feed or stop feeding into the reactor to ensure the continuity of feeding.

5. The intelligent metering and automated feeding method for radioactive resin according to claim 1, characterized in that: The method further includes step d): when a resin feed tank completes feeding, the pressure can be released by opening the overflow and pressure relief valves, and the resin that may adhere to the filter can be backwashed back to the resin feed tank through the backwash pipe.

6. The intelligent metering and automated feeding method for radioactive resin according to claim 5, characterized in that: Step e) specifically comprises: repeating steps a) to d) to continue automatic material filling to achieve continuous material feeding.

7. A system based on the intelligent metering and automated feeding method of radioactive resin according to claim 1, characterized in that: It includes a waste resin storage tank, a resin constant volume tank, a resin feed tank and a reactor connected in sequence. Radioactive resin waste flows from the waste resin storage tank into the resin constant volume tank, the resin feed tank and the reactor in sequence through a pipeline, and finally reacts in the reactor.

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