Heavy Rejects Cleaner

In the paper industry, "Heavy Rejects Cleaner" is a key piece of equipment specifically designed for removing heavy impurities from the pulp. Its main function is to effectively separate out impurities with a relatively high specific gravity, such as sand grains, stones, metal fragments, glass chips, etc., from the pulp flow, thereby enhancing the cleanliness and quality of the pulp and providing pure pulp for the subsequent papermaking processes.

Used for getting rid of small heavy rejects in the pulp.

1.Centrifugal Separation：The pulp rotates at a high speed inside the Heavy Rejects Cleaner, generating a strong centrifugal force. Due to the higher specific gravity of the impurities, they are flung towards the wall of the equipment under the action of the centrifugal force.

2.Reverse Flushing：Simultaneously, there is a reverse flushing water system inside the equipment, which washes down the impurities adhering to the wall and carries the impurities out through the reject outlet.

3.Pulp Purification：The pulp, after centrifugal separation and flushing, flows out from the good pulp outlet at the center, achieving the separation of the pulp and heavy impurities.

1.Inlet for Pulp：It is used to receive the pulp to be treated and is usually designed with a diversion structure to enable the pulp to enter the cleaner uniformly.

2.Separation Chamber：This is the core area where the centrifugal force is generated and the impurity separation takes place. Its shape and size are meticulously designed.

3.Reject Outlet：It is used to discharge the separated heavy impurities and is usually equipped with an adjustment device to control the amount of rejects.

4.Good Pulp Outlet：The purified pulp flows out from here and continues to the subsequent papermaking processes.

5.Flushing Water System：It includes a water tank, water pump, pipes, and nozzles, etc., providing the necessary water flow for reverse flushing.

1.Efficient Reject Removal：It is capable of quickly processing a large amount of pulp and removing the heavy impurities, enhancing the reject removal efficiency.

2.High Precision of Reject Removal：It can precisely separate out tiny heavy impurity particles, ensuring the high quality of the pulp.

3.Stable Operation：It performs stably and reliably during long-term continuous operation and is less prone to malfunctions.

4.Strong Adaptability：It can adapt to different concentrations, flow rates, and properties of the pulp, having a wide range of applications.

1.Operation Key Points

Before starting the machine, the operator needs to check the sealing of the equipment, the tightness of the connecting components, and the normal display of each instrument.

Based on the characteristics of the pulp and the production requirements, reasonably set parameters such as the inlet pulp pressure, the flushing water flow rate, and the reject amount.

During the operation, closely observe the pressure changes of the inlet and outlet pulp, the reject situation, and the vibration of the equipment, and adjust the operation parameters in a timely manner.

2.Maintenance Work

Regularly clean the inlet for pulp and the reject outlet to prevent clogging.

Check the working status of the flushing water system to ensure the nozzles are unobstructed and the water pressure is stable.

Inspect and clean the inner wall of the separation chamber to prevent the accumulation of impurities.

Regularly replace wearing parts, such as seals and bearings, to ensure the normal operation of the equipment.

1.Improving Paper Quality：By removing the heavy impurities, it reduces flaws and holes on the paper surface, improving the flatness and strength of the paper.

2.Protecting Papermaking Equipment：It avoids the wear and damage to the subsequent papermaking equipment, such as the wire section and press section of the papermaking machine.

3.Optimizing the Production Process：The stable reject removal effect helps maintain the continuity and stability of the production, improving the production efficiency.

4.Reducing Production Costs：It reduces the waste and substandard products due to paper quality issues, lowering the consumption of raw materials and energy.

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