4  types sludge thickener underflow discharge, including: slurry pump discharge, valve discharge, automatic discharge device, and siphon discharge.

1. Slurry pump discharge

I. Slurry pump discharge: also called underflow pump discharge

1. Working principle: Install a pump at the bottom of the thickener to extract high-concentration underflow materials. The underflow pump is usually a slurry pump.

2. Features:

- Strong mud discharge capacity, can adapt to underflow materials of different concentrations and flows.

- The mud discharge speed can be controlled by adjusting the speed and flow of the pump.

The operating cost is relatively high, including energy consumption and maintenance costs, and regular maintenance and maintenance are required

2. Valve discharge

1. Working principle: Install a mud discharge valve at the bottom of the thickener, and open the valve to allow the material to flow out naturally.

Suitable for small thickeners or low concentrations

2. Features:

- Simple structure, easy operation, and low cost.

- The mud discharge speed is relatively slow, and it is difficult to accurately control the amount of mud discharged.

- For high-concentration underflow materials, the valve may be blocked, which requires regular cleaning and maintenance.

3. automatic mud discharge device

1. Working principle: It is composed of sensors, controllers and actuators.

According to the liquid level in the thickener, underflow concentration and other parameters, automatic mud discharge is realized

2. Features:

- Improve the working efficiency and stability of the thickener.

- Reduce the workload and error of manual operation, and improve the safety and reliability of production.

- The cost of the automatic mud discharge device is relatively high, and professional technicians are required to operate

4. siphon mud discharge

1. Working principle: Use the siphon principle to suck out the high-concentration underflow material at the bottom of the thickener. A siphon pipe is set at the bottom of the thickener. When the pipe is filled with liquid and a certain negative pressure is formed, the underflow material will be sucked into the pipe under the action of atmospheric pressure, thereby realizing mud discharge.

2. Features:

- No power equipment is required, and the operating cost is low.

-Limited mud discharge capacity, suitable for small thickeners or low underflow concentration