Waste collection device and waste collection method

Abstract

The present invention provides a waste recovery apparatus and waste recovery method that can efficiently separate solid waste from a liquid to be treated regardless of particle size distribution, and can stably reduce the volume of waste recovered from the liquid to be treated. [Solution] The waste collection device 100 is equipped with filter media 11, 21 for separating solids from the liquid to be treated, and comprises a plurality of containers 10, 20 connected in series, a first pipe 1 for introducing the liquid to be treated, a second pipe 2 for transporting the liquid to be treated, a third pipe 3 for discharging the treated liquid from which the solids have been separated, and a fourth pipe 4 for returning the treated liquid from the downstream side to the upstream side. The filter media installed in the upstream container 10 is backwashed by the treated liquid returned from the downstream container 20. In the waste collection method, while the solids from the liquid to be treated are separated, the treated liquid from which the solids have been separated is returned from the downstream side to the upstream side, intermittently or continuously backwashing the filter media installed in the upstream container.

Claims

[Claim 1] A waste recovery device that separates and recovers solid waste from a liquid to be treated, A filter material is installed to separate solid components from the liquid to be treated, and there are multiple containers connected in series with each other. A first pipe for introducing the liquid to be treated into the foremost container, A second pipe for transferring the liquid to be processed from the preceding container to the subsequent container, A third pipe for discharging the treated liquid from which the solids have been separated from the last container, The system includes a fourth pipe that returns the treated liquid from the downstream container to the upstream container, A waste recovery device in which the filter material installed in the preceding container is backwashed by the treated liquid returned from the subsequent container. [Claim 2] A waste collection device according to claim 1, The container is a waste collection device that is detachably attached to the first pipe, the second pipe, the third pipe, and the fourth pipe. [Claim 3] A waste collection device according to claim 2, The aforementioned container is a waste collection device that is detachable via a flange. [Claim 4] A waste collection device according to claim 1, A waste recovery device in which the filter material installed in the preceding container is intermittently or continuously backwashed by the treated liquid returned from the subsequent container while separating the solid components in the liquid to be treated. [Claim 5] A waste collection device according to claim 1, The first piping is connected to the primary side of the filter material of the foremost container, The second piping is connected to the secondary side of the filter material in the preceding container and to the primary side of the filter material in the subsequent container. The third pipe is connected to the secondary side of the filter material in the last container and to the outside of the waste collection device. The fourth pipe is connected to the secondary side of the filter material of the downstream container and the secondary side of the filter material of the upstream container in the waste recovery device. [Claim 6] A waste collection device according to claim 1, The filter material installed in the container on the front side is a floor-type strainer installed parallel to the bottom surface of the container. The waste recovery device is an immersion type filter in which the filter material installed in the downstream container is submerged below the liquid surface of the container. [Claim 7] A waste collection device according to claim 1, The aforementioned liquid to be processed is radioactive liquid waste containing solid components that are radioactive materials, and the waste recovery device is such that the liquid to be processed is radioactive liquid waste. [Claim 8] A waste recovery method that separates and recovers solid waste from a liquid to be treated, The liquid to be treated, which contains solid waste, is sequentially introduced into multiple containers connected in series, each equipped with a filter medium for separating the solids from the liquid, thereby separating the solids contained in the liquid to be treated. The treated liquid from which the solid components have been separated is discharged and recovered from the last container. A waste recovery method comprising separating the solids in the liquid to be treated with the filter material, returning the treated liquid from which the solids have been separated from the downstream container to the upstream container, thereby intermittently or continuously backwashing the filter material installed in the upstream container. [Claim 9] A waste collection method according to claim 8, A waste recovery method comprising recovering the treated liquid, then removing the container from the piping connected to the container and disposing of it together with the solid matter. [Claim 10] A waste collection method according to claim 8, A waste recovery method wherein the liquid to be treated is radioactive liquid waste containing solid components that are radioactive materials.

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