Ion exchange eluting column for compact moving bed

Abstract

The invention relates to the technical field of uranium mining and metallurgy, and particularly discloses an ion exchange eluting column for a compact moving bed. The eluting column comprises an exchange column, a resin inlet, a liquid inlet, an exhaust port, a plurality of liquid outlet devices and a resin outlet; the resin inlet and the liquid inlet are formed in the top end of an upper sealing head arranged at the upper end of the exchange column; the resin outlet is formed in the center of a lower sealing head arranged at the lower end of the exchange column, and meanwhile the liquid outlet devices are arranged on the lower sealing head; a compact resin bed layer is arranged in the exchange column; the resin inlet is of a detachable flange cylinder structure; and the exhaust port is of a detachable pipe connecting flange assembly structure. According to the eluting column, the flow and the concentration are both suitable for the eluting column under the working pressure of 0.6 MPa, the using amount of eluting liquid is low, material liquid is distributed uniformly, deflected flowing and channeling are prevented, the space utilization rate of resin is high, the system using resin amount is low, resin eluting and converting achieved through a fixed bed and resin feeding and discharging achieved through the moving bed alternate freely, and the eluting liquid is qualified.

Description

technical field [0001] The invention belongs to the technical field of uranium mining and metallurgy, and in particular relates to a dense moving bed ion exchange leaching tower. Background technique [0002] The ion exchange leaching tower has become an important equipment in the uranium hydrometallurgy process. The original fixed bed and moving bed leaching towers in my country's uranium mining and metallurgy industry have the following problems: 1. The operation mode of the fixed bed is discontinuous, with simple structure and easy operation , but part of the space inside the equipment is occupied by the quartz sand layer or the partition layer, the resin loading is small, and the resin bed cannot be moved. 2. The working pressure of the moving bed is normal pressure, and the distance between the resins is relatively large, so the resin bed needs to be high. The height of the used leaching tower is relatively high, about 14.8m. The equipment and civil construction investm...

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Problems solved by technology

[0002] The ion exchange leaching tower has become an important equipment in the uranium hydrometallurgy process. The original fixed bed and moving bed leaching towers in my country's uranium mining and metallurgy industry have the following problems: 1. The operation mode of the fixed bed is discontinuous, with simple structure and easy operation , but part of the internal space of the equipment is occupied by quartz sand layer or partition layer, the resin loading is small, and the resin bed cannot be moved

2. The working pressure of the moving bed is normal pressure, the distance between the resins is relatively large, and the height of the resin bed is required

The height of the used leaching tower is relatively high, about 14.8m, the investment cost of equipment and civil construction is large, and automatic operation is required during operation, the flow rate is small, and the concentration of the eluting liquid is not easy to guarantee

The liquid outlet device in the existing leaching tower is set at the center of the lower head of the equipment, which has the following disadvantages: the feed liquid is not easy to be evenly distributed on the resin bed, and bias flow and channel flow are prone to occur, and the mass transfer efficiency is low; the filter screen is closely attached to the circular On the shaped filter tube, the resin and broken resin directly cover the surface of the filter screen during operation, resulting in a reduction in the effective filtration area of ​​the small holes on the filter tube, and the filter screen is easily blocked under pressure conditions, reducing the flow of liquid; the screen is covered by broken resin and The complete resin is collided and worn, causing screen damage and resin leakage; the detachable structure is complicated, and it is inconvenient to operate during use, cleaning, repair and maintenance

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