CN-113213670-B - Device and method for removing organic matters in uranium purification conversion wastewater

Abstract

A device and a method for removing organic matters in uranium purification conversion wastewater belong to the field of uranium wastewater recycling. The invention solves the problem that the waste liquid treatment result does not reach the standard because a small amount of organic phase is contained in the raffinate waste liquid generated in the uranium purification process to reduce the adsorption effect of the exchange resin. The invention comprises a pre-separation box, a vacuum separator, a pre-filter, a high molecular separator and an adsorption filter which are sequentially connected through pipelines, wherein the inlet end of the pre-separation box is connected with a sewage pipeline, the outlet end of the pre-separation box is also connected with a dirty oil collecting box, and the adsorption filter is provided with a discharge port. By the device and the method for removing the organic matters in the uranium-containing wastewater, the content of the organic phase in the uranium-containing wastewater is reduced to below 1mg/L, the organic phase in the uranium-containing wastewater is prevented from reducing the adsorption effect of the exchange resin, the adsorption effect of the exchange resin on uranium ions in the uranium-containing wastewater is improved, and the uranium content of the uranium-containing wastewater is enabled to be below a standard value to be discharged.

Inventors

• ZHANG LONG
• LI RUI
• GENG LONG
• JI ZEYU
• ZHOU TIANHUA
• DONG XUE
• YANG FENGJIN
• WANG JUN
• ZENG ZHIHUI
• Tian Shenliang

Assignees

• 中核四0四有限公司

Dates

Publication Date

20260512

Application Date

20210604

Claims (2)

1. 1. The method for removing the organic matters in the uranium purification conversion wastewater is characterized by comprising a removing device, wherein the removing device comprises a pre-separation tank (2), a vacuum separator (3), a pre-filter (5), a high molecular separator (6) and an adsorption filter (7) which are sequentially connected through pipelines, the inlet end of the pre-separation tank (2) is connected with a sewage pipeline (1), the outlet end of the pre-separation tank (2) is also connected with a dirty oil collecting tank (10), and a discharge port (11) is arranged on the adsorption filter (7); An organic phase collecting chamber (8) is connected to the outlet end of the vacuum separator (3), the outlet end of the organic phase collecting chamber (8) is communicated with a dirty oil collecting box (10), and an organic phase discharging pump (9) is arranged between the organic phase collecting chamber (8) and the dirty oil collecting box (10); A back flushing gas inlet (12) and a back flushing water inlet (13) are arranged on the adsorption filter (7), the back flushing gas inlet (12) is sequentially connected with the adsorption filter (7), the high molecular separator (6), the pre-filter (5) and the pre-separation box (2) through pipelines, and the back flushing water inlet (13) is sequentially connected with the adsorption filter (7), the high molecular separator (6), the pre-filter (5) and the pre-separation box (2) through pipelines; The pre-separation box (2) comprises a first chamber (14), a second chamber (15) and a third chamber (16), drain valves (19) are respectively arranged at the bottoms of the first chamber (14), the second chamber (15) and the third chamber (16), and the second chamber (15) is respectively communicated with the first chamber (14) and the third chamber (16); The first chamber (14) is a natural sedimentation chamber, the second chamber (15) is a honeycomb inclined tube sedimentation chamber, a honeycomb inclined tube is arranged in the second chamber (15), and the outlet end of the sewage pipeline (1) is arranged in the middle of the first chamber (14); a water delivery pump (4) is arranged between the vacuum separator (3) and the prefilter (5); the high molecular separators (6) are arranged in two groups, the two groups of high molecular separators (6) are arranged in parallel, the adsorption filters (7) are arranged in two groups, and the two groups of adsorption filters (7) are arranged in parallel; The removing method comprises the following steps: the sewage flows into a pre-separation tank (2) through a sewage pipeline (1), organic phase separated after pretreatment by the pre-separation tank (2) is discharged into a sewage oil collecting tank (10) for storage through a pipeline, and the sewage separated by the pre-separation tank (2) flows into a vacuum separator (3); step two, the wastewater treated by the pre-separation box (2) enters a vacuum separator (3) for vacuum separation, the vacuum separator (3) separates organic phases in the wastewater into an organic phase collecting chamber (8), and the wastewater after vacuum separation flows into a pre-filter (5) through a pipeline; The organic phase in the organic phase collecting chamber (8) is conveyed to a dirty oil collecting box (10) for storage through an organic phase discharging pump (9), and the wastewater filtered by the prefilter (5) sequentially flows through a high molecular separator (6) and an adsorption filter (7) through a pipeline for adsorption filtration; fourthly, the organic matter content of the waste water after adsorption filtration through the macromolecule separator (6) and the adsorption filter (7) is less than 1mg/L, and the waste water is discharged through a discharge port (11); And fifthly, introducing clear water into the backwashing water inlet (13), flushing the preseparation box (2), the prefilter (5) and the high polymer separator (6) by the clear water through a pipeline, introducing gas into the backwashing gas inlet (12), and flushing the preseparation box (2), the prefilter (5) and the high polymer separator (6) by the gas through the pipeline.
2. 2. A method for removing organic matters from uranium purification and conversion wastewater according to claim 1, wherein the specific step of the step one comprises the steps that sewage enters a first chamber (14) of a preseparation box (2) to be naturally settled, solid particles in the sewage are deposited to the bottom of the first chamber (14) and discharged through a blow-down valve (19), organic matters in the sewage are suspended to the upper part of the first chamber (14), the sewage after natural settlement flows out from the upper part of the first chamber (14) and flows in from the bottom of a second chamber (15), impurities are filtered through a honeycomb inclined tube of the second chamber (15), free organic matters and suspended organic matters in the sewage are rapidly separated through a blow-down valve (19) at the bottom of the second chamber (15), the filtered impurities are discharged through the blow-down valve (19) at the bottom of the second chamber (15), the sewage flows into a third chamber (16) from the top of the second chamber (15), the sewage of the third chamber (16) is discharged into a vacuum separator (3) through a pipeline, and the impurities are discharged through the blow-down valve (19) at the bottom of the third chamber (16).

Description

Device and method for removing organic matters in uranium purification conversion wastewater Technical Field The invention relates to a device and a method for removing organic matters in wastewater, and belongs to the field of uranium wastewater recycling. Background The raffinate waste liquid generated in the extraction and purification production process of the uranium purification and conversion production line contains a small amount of organic phase TBP, DPB, MDP and hydrogenated coal organic phase, and the waste liquid is required to enter an ion exchange system for further treatment and recovery of metallic uranium therein, and is treated to a qualified emission standard. Through experimental study, organic phase in the waste liquid is adhered in an exchange resin adsorption channel in an ion exchange system, so that resin poisoning is caused, the resin adsorption effect is reduced, and the waste liquid treatment result does not reach the standard, therefore, a device for removing organic matters in uranium purification and conversion waste water is required. Disclosure of Invention The invention solves the problem that the waste liquid treatment result does not reach the standard because a small amount of organic phase is contained in the raffinate waste liquid generated in the uranium purification process to reduce the adsorption effect of exchange resin, and further discloses a device and a method for removing organic matters in uranium purification conversion waste water. The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention. The technical scheme of the invention is as follows: The utility model provides a remove device for organic matter in uranium purification conversion waste water, includes the preseparation case, vacuum separator, prefilter, polymer separator and the adsorption filter that pass through the pipe connection in proper order, and the entry end of preseparation case is connected with sewage pipeline, and the exit end of preseparation case still is connected with dirty oil collecting box, is provided with the discharge port on the adsorption filter. Further, an outlet end of the vacuum separator is connected with an organic phase collecting chamber, an outlet end of the organic phase collecting chamber is communicated with a dirty oil collecting box, and an organic phase discharging pump is arranged between the organic phase collecting chamber and the dirty oil collecting box. Further, a water pump is arranged between the vacuum separator and the prefilter. Further, a back flushing gas inlet and a back flushing water inlet are arranged on the adsorption filter, the back flushing gas inlet is sequentially connected with the adsorption filter, the high polymer separator, the prefilter and the preseparation box through pipelines, and the back flushing water inlet is sequentially connected with the adsorption filter, the high polymer separator, the prefilter and the preseparation box through pipelines. Further, the macromolecule separators are arranged in two groups, the macromolecule separators in two groups are arranged in parallel, the adsorption filters are arranged in two groups, and the adsorption filters in two groups are arranged in parallel. Further, the preseparation box comprises a first chamber, a second chamber and a third chamber, drain valves are respectively arranged at the bottoms of the first chamber, the second chamber and the third chamber, and the second chamber is respectively communicated with the first chamber and the third chamber. Further, the first chamber is a natural sedimentation chamber, the second chamber is a honeycomb inclined tube sedimentation chamber, a honeycomb inclined tube is arranged in the second chamber, and the outlet end of the sewage pipeline is arranged in the middle of the first chamber. Further, an oil level electrode is arranged in the preseparation box, and an ultrasonic liquid level meter is arranged on the preseparation box. The method for removing the organic matters in the uranium purification conversion wastewater comprises the following steps: the sewage flows into a pre-separation box through a sewage pipeline, organic phase separated after pretreatment by the pre-separation box is discharged into a sewage oil collecting box through a pipeline for storage, and the sewage separated by the pre-separation box flows into a vacuum separator; Step two, the wastewater treated by the pre-separation box enters a vacuum separator for vacuum separation, the vacuum separator separates organic phases in the wastewater into an organic phase collecting chamber, and the wastewater after vacuum separation flows into a pre-filter through a pipeline; Step three