Silo Discharge System for Cement & Raw Materials

I. Overview

The silo bottom discharge unit consists of a bottom screw valve, a bottom distribution box, a pneumatic shut-off valve, an electric flow control valve, and a discharge chute (see Figure 1); it is designed for discharging cement raw meal powder or cement from the bottom of a silo. This discharge unit is capable of automatically regulating the discharge flow to ensure uniformity. Featuring a rational structural design, it offers simple and convenient operation and maintenance; it can be configured with up to three discharge outlets. Users also have the option to select a silo-side discharge unit (see Figure 2).

The pneumatic shut-off valves and electric flow control valves utilized in this facility's discharge units are manufactured using German technology. The valve cores and housings are constructed from 16Mn steel; the surfaces of the valve cores are chrome-plated to a thickness of 10μm to enhance their wear resistance. The valve cores employ high-quality, integral wool felt seals; the tightness of the sealing boxes can be adjusted externally, and for replacement, the cores can be extracted from either side without the need to dismantle the valve body. Both the valve core openings and the housing components are fabricated using precision laser cutting and machine tooling processes, thereby ensuring the high-precision assembly of the equipment.

II. Working Principle

Materials are fluidized by aeration air, flow through the screw gate and flow control valve. The pneumatic valve controls on/off, and the electric valve adjusts flow rate to realize uniform and stable discharge.

III. Features & Advantages

1. Stable and Adjustable Discharge: Features automatic flow regulation.
2. High Wear Resistance: Valve core is constructed from 16Mn steel with chrome plating.
3. Reliable Sealing: Utilizes a wool felt seal that can be replaced without disassembling the valve.
4. Easy Maintenance: Offers a long service life with minimal wearing parts.
5. Multiple Outlets: Supports multi-point discharge, with up to 3 outlets available.
6. Suitable for Retrofitting: Ideal for renovation and upgrade projects.

IV. Application

• Cement silo discharge
• Raw meal silo discharge
• Fly ash silo discharge
• Powder storage system
• Cement plant batching & conveying

V. Selection Guide

1. Silo type: cement silo / raw meal silo
2. Required discharge rate (t/h)
3. Installation: silo bottom / silo side
4. Number of discharge outlets
5. Matching with conveying equipment