Chelate resin tower

Abstract

The invention discloses a chelate resin tower. The invention overcomes the problems of high manufacturing cost and running cost, easy filter cap break and unsafe operation in a prior chelate resin tower. The chelate resin tower is characterized in that: three salt water admitting pipes in 120-degree distribution and a backwash exhaust pipe are welded on the top part of the tower; a backwash filter coil tray is arranged on the backwash exhaust pipe; an effluent filter tube component is arranged on the bottom of the tower body; and an effluent filter coil tray is arranged in the effluent filtertube. The chelate resin tower has the advantages that: the salt water is distributed more uniformly when entering the tower; the effluent filter tube component is capable of preventing the chelate resin from entering an electrolytic bath system with the refined salt water through a salt water exhaust pipe, thereby not only improving the availability of the chelate resin, but also avoiding the system down caused by the threat on an ionic film, ensuring the safe operation of the electrolytic bath, and reducing the troubleshooting time; and the manufacturing cost and the rubber lining cost are reduced due to the cancellation of a pattern board and the adoption of a tower structure where end plates are directly welded onto upper and lower ends of a barrel body.

Description

technical field [0001] The invention belongs to the technical field of ion exchange equipment, in particular to a chelating resin tower used in the secondary refining process of brine in the chlor-alkali production process. Background technique [0002] In the chlor-alkali production process, chlorine gas and caustic soda are produced from the electrolytic cell through the electrolysis of salt water. The requirements for the salt water are quite strict when the electrolytic cell electrolyzes the salt water. It is required that the total content of metal cations such as calcium and magnesium in the salt water should not exceed 20PPb, and the chelating resin tower is the throat equipment for brine to enter the electrolyzer, so the design of the chelating resin tower is very important. In the prior art, the chelating resin tower for the production of chlor-alkali is a flower plate clamped by a pair of large flanges on the tower body, and dozens to hundreds of filters made of AB...

AI Technical Summary

Problems solved by technology

In the prior art, the chelating resin tower for the production of chlor-alkali is a flower plate clamped by a pair of large flanges on the tower body, and dozens to hundreds of filters made of ABS materials are installed on the flower plate through bolts. Correspondingly, There are many small holes on the flower plate for installing ABS filter caps, which increases the cost of the rubber lining. The equipment with this structure not only has high manufacturing costs, but also high operating costs, and because it does not have a backwash filter device, it will The good chelating resin is washed out together with the broken resin. If the backwashing intensity is high, the ABS filter cap will break, and the chelating resin will enter the electrolytic cell system, posing a threat to the ion membrane, causing the system to stop and need to be replaced. When filtering the cap, it is necessary to remove all the flanges and all the bolts on the tower body, and the upper tower section and flower plate of the tower body can only be operated after hoisting, which increases a lot of maintenance time

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