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Working principle 1. Upstream water production: The water to be treated passes through the resin layer from bottom to top. The resin layer can form a boiling layer at the lower part of the equipment and a floating layer (compressed layer) at the upper part; a water cushion layer is formed between these two layers to keep them strictly separated. The various ions in the water to be treated first exchange with the resin in its boiling state, which increases the exchange contact area and fully utilizes the resin’s exchange capacity. Most of the ions can be removed through this exchange process with the boiling resin, while the remaining ions pass through the floating layer (compaction layer), which serves a refining function, thereby achieving the best exchange results and the highest quality of treated water. On the other hand, as the treated water passes through the boiling layer, the resin floats freely, resulting in low penetration resistance and thereby reducing the operational resistance of the entire bed. 2. Downstream regeneration: The regenerating agent flows through the resin layer from top to bottom. Excess fresh regenerating agent first comes into contact with the strong-resin layer in the upper part, ensuring that the resin layer responsible for water quality is fully regenerated. The regenerating waste fluid then flows through the weak-resin layer, allowing the regenerating agent to be utilized fully and achieving the best results. On the other hand, regenerated products and debris can be easily removed from top to bottom, saving water used for cleaning. 3. External backwashing: As the operating cycle progresses, more fine resin particles and contaminants are formed and washed out from the water being treated. When the pressure drop exceeds the normal operating value by 0.04–0.06 MPa, the resin can be transferred to an external backwashing tower for backwashing, thereby removing the broken resin particles and other impurities. Due to the use of compressed air for scrubbing, it achieves the best backwashing effect on heavily contaminated resins. In factories and mines without compressed air, air scrubbing can also be omitted, and still good backwashing results can be achieved. Different types of resins can be backwashed separately in the same external backwash tower. Operation instructions: 1. Start operation. Let the water flow from bottom to top; open the inlet valve and the air valve. Once the device is filled with water, close the air valve and open the outlet valve, continuing this process until the water quality meets the requirements. 2. Regeneration ⑴ Bed settling: Open the replacement water valve and the drain valve to allow the resin that has been boiled during operation to settle evenly. The flow rate for bed settling is generally between 13 and 16 m/h, over a period of 5 minutes. ⑵ Chemical addition: Open the inlet valve for the regeneration liquid and the drain valve. It is ideal to heat the regeneration liquid used for the anion exchange resin to 35–40°C for regeneration; the flow rate during regeneration is generally between 5 and 13 m/h. Sulfuric acid regeneration should be carried out in two steps. The regeneration time can be determined according to actual needs. ⑶ Displacement: Open the displacement water valve and the drain valve to displace the chemicals remaining in the resin. The water used for bed backwashing should be heated to 35–40°C; the backwashing flow rate is generally 5–13 m/h, and the backwashing time is around 20 minutes. ⑷ Cleaning: Open the replacement water valve and the drain valve to completely remove all impurities remaining in the resin, until the water output meets the required standards. The cleaning flow rate is generally 13–16 m/h. ⑸ Cleaning before operation: Open the inlet valve and the upper drain valve. Once the water quality meets the requirements, close the drain valve and open the outlet valve to start operation; the cleaning flow rate is the same as the operating flow rate. Order Notice: All samples of this product are operated manually. Q41F-16ZF valves are used for resin inlets and outlets, while G14J-10 valves are used for other connections. If remote control, programmed operation, or other types of valves are to be used, the piping system must be designed separately. The product platform, escalators, valves, and resin are the responsibility of the user. Resin washer (equipped with positive and negative floating beds): 1. Transporting resin: Open the water supply valve D3 for the boiling floating bed and the drain valve D4 on the backwashing tower, as well as the resin inlet and outlet valve D1, and send more than about half of the resin amount outside the bed into the backwashing tower. 2. Drainage Open the drainage valve and the middle drain valve on the backwash tower to remove the water that has been carried by the resin into the backwash tower from outside the bed. This is done to prevent the resin from being carried away by the air during cleaning, as well as to avoid the air from drying out the resin. 3. Air scouring: Open the compressed air inlet valve and the upper drain valve of the backwash tower, and feed compressed air from the bottom cone to stir the resin and remove various suspended particles attached to its surface. 4. Pause Allows the resin, which is boiling as the air scours it, to settle slowly. 5. Return of resin (1): Open the water supply valve of the backwash tower, as well as the resin inlet and outlet valves and the resin supply valve for the dual-chamber boiling floating bed. Also open the drain valve to return the resin inside the backwash tower to the exchange tower. 6. Return resin (2) The operating steps are the same as those for returning resin (1); in addition, the flushing valve of the backwash tower is opened to increase the transport flow rate. All the resin remaining in the pipeline is completely removed, and the backwashing is now complete. The resins after backwashing are thoroughly regenerated using twice the amount of regenerant.