CN-121971964-A - Device for purifying light impurities

CN121971964ACN 121971964 ACN121971964 ACN 121971964ACN-121971964-A

Abstract

The application belongs to the technical field of uranium enrichment, and particularly relates to a device for purifying light impurities. The device comprises a membrane component arranged before materials enter a receiving container, wherein the membrane component comprises a shell and separation membrane wires arranged in the shell, the separation membrane wires are used for separating UF 6 and light impurities, an inlet of the membrane component is connected with the materials, a product outlet is connected with the receiving container, an impurity outlet is connected with an impurity collecting device, and the impurity collecting device is used for purifying tail gas. The application simplifies the process flow of purifying light impurities in the product, reduces the workload, improves the working efficiency, realizes continuous, stable and efficient separation of materials and light impurities in uranium enrichment production products, and lays a foundation for subsequent optimization of material supply and extraction factory layout, reduction of engineering construction cost and operation cost and improvement of the automation level of the system.

Inventors

YIN MAOSEN
SUN DAN
Ding Chenghui
ZHANG HAN
JIN XIAODONG
XIAO XIONG
GUAN CHENGMING
ZHOU WEIDONG
YANG XIAOSONG
LV BOWEN
FENG XUEZHI

Assignees

中核陕西铀浓缩有限公司

Dates

Publication Date: 20260505
Application Date: 20251231

Claims (7)

1. An apparatus for purifying light impurities, characterized in that it comprises a membrane module (3) mounted before the material enters a receiving container (2); The membrane component (3) comprises a shell and separation membrane wires arranged in the shell, wherein the separation membrane wires are used for separating UF 6 and light impurities; The inlet of the membrane component (3) is connected with the material, the product outlet is connected with the receiving container (2), and the impurity outlet is connected with the impurity collecting device; The impurity collecting device is used for purifying tail gas.
2. The device for purifying light impurities according to claim 1, characterized in that the area of the separation membrane filaments is determined according to the system product material flow and the purification efficiency of the membrane module (3).
3. The device for purifying light impurities according to claim 1, characterized in that a filter (1) for filtering impurities having a diameter larger than UF 6 is also connected between the material and the membrane module (3).
4. A device for purifying light impurities according to claim 3, characterized in that a booster pump is connected before the filter (1) for pressurizing the material.
5. The apparatus for purifying light impurities according to any one of claims 1 to 4, characterized in that said impurity collecting means comprises a primary refrigerator (4) and a secondary refrigerator (5) connected in series; the primary refrigeration cabinet (4) and the secondary refrigeration cabinet (5) are used for collecting uranium hexafluoride.
6. The apparatus for purifying light impurities according to claim 5, wherein the impurity collecting apparatus further comprises a primary adsorption column (6) and a secondary adsorption column (7); The first-stage adsorption tower (6) and the second-stage adsorption tower (7) are connected in series one by one at the outlet of the second-stage refrigeration cabinet (5) and are used for absorbing the separated HF.
7. The apparatus for purifying light impurities according to claim 6, further comprising a buffer tank (8) and a vacuum pump (9); the buffer tank (8) and the vacuum pump (9) are connected in series one by one at the outlet of the secondary adsorption tower (7), so that the vacuum degree of the permeation side is ensured, and the air which cannot be condensed and adsorbed is discharged into the tail gas system.

Description

Device for purifying light impurities Technical Field The application belongs to the technical field of uranium enrichment, and particularly relates to a device for purifying light impurities. Background Products separated from the uranium enrichment factory are collected into a frozen container in a low-temperature air cooling box for condensation after being pressurized by a pressurizing device, and because partial light impurities are doped in product materials, the light impurities are accumulated in a receiving container along with the increase of receiving time, and the receiving rate and the receiving capacity of the container are affected, so that the product receiving container of a material feeding system is required to be purified at regular time in order to ensure the quality and continuous receiving of uranium enriched products. At present, the purification of light impurities is mainly carried out in a fractional condensation mode, and the problems of complex operation flow, low separation efficiency, harsh separation conditions, long material pouring time, heavy work task and the like exist, and the purification process involves a phase change process, so that the work environment of a process factory building is relatively bad. Disclosure of Invention The application aims to provide a device for purifying light impurities, which solves the problems of complex operation flow, low separation efficiency, harsh separation conditions, long material pouring time and heavy work task of the traditional fractional condensation. The technical scheme for realizing the purpose of the application comprises the following steps: An embodiment of the present application provides an apparatus for purifying light impurities, the apparatus comprising: a membrane module mounted before the material enters the material receiving container; the membrane component comprises a shell and separation membrane wires arranged in the shell, wherein the separation membrane wires are used for separating UF 6 and light impurities; the inlet of the membrane component is connected with the material, the product outlet is connected with the material receiving container, and the impurity outlet is connected with the impurity collecting device; The impurity collecting device is used for purifying tail gas. Optionally, the area of the separation membrane wire is determined according to the material flow of the system product and the purification efficiency of the membrane component. Optionally, a filter is further connected between the material and the membrane component, and is used for filtering impurities with the diameter larger than UF 6. Optionally, a booster pump is connected before the filter and is used for boosting the material. Optionally, the impurity collecting device comprises a primary refrigerator and a secondary refrigerator which are connected in series; The first-stage refrigeration cabinet and the second-stage refrigeration cabinet are used for collecting uranium hexafluoride. Optionally, the impurity collecting device further comprises a first-stage adsorption tower and a second-stage adsorption tower; The first-stage adsorption tower and the second-stage adsorption tower are connected in series one by one at the outlet of the second-stage refrigeration cabinet and are used for absorbing the separated HF. Optionally, the impurity collecting device further comprises a buffer tank and a vacuum pump; The buffer tank and the vacuum pump are connected in series one by one at the outlet of the secondary adsorption tower, so that the vacuum degree of the permeation side is ensured, and the air which cannot be condensed and adsorbed is discharged into the tail gas system. The beneficial technical effects of the application are as follows: The embodiment of the application provides a device for purifying light impurities, which comprises a membrane component arranged before a material enters a receiving container, wherein the membrane component comprises a shell and separation membrane wires arranged in the shell, the separation membrane wires are used for separating UF 6 and the light impurities, an inlet of the membrane component is connected with the material, a product outlet is connected with the receiving container, an impurity outlet is connected with an impurity collecting device, and the impurity collecting device is used for purifying tail gas. According to the embodiment of the application, the uranium hexafluoride and the light impurities are directly separated by utilizing the membrane component, and then the uranium hexafluoride and the light impurities are respectively collected, so that the aim of continuously separating the uranium hexafluoride and the light impurities in uranium enrichment production is fulfilled, the process flow of purifying the light impurities in the product is simplified, the workload is reduced, the working efficiency is improved, the continuous, stable and efficient separation