Horizontal Directional Drilling (HDD) Mud Recycling System | TR Solids Control

In urban municipal construction, underground pipeline renovation and other infrastructure projects, trenchless construction has become the mainstream due to minimal environmental impact and no traffic disruption.

The trenchless mud recycling system realizes mud circulation and reuse through multi-stage separation, delivering outstanding performance in environmental compliance, cost control and construction efficiency.

Horizontal directional drilling, pipe jacking and other constructions generate a large amount of waste mud mixed with sand and cuttings. Improper disposal easily causes pollution, wastes materials and increases costs, restricting the green development of the industry. The system solves this problem with the solution of Purification – Circulation – Resource Utilization, achieving a win-win situation of environmental protection and high efficiency.

Trenchless Mud Recycling System (HDD Mud Recycling / Slurry Separation System) is the core supporting equipment for trenchless pipeline crossing projects such as Horizontal Directional Drilling (HDD). It purifies the returned sand-bearing mud, separates solid particles of different sizes, restores mud performance for recycling, and properly disposes separated cuttings. This greatly reduces new mud consumption and waste mud discharge, achieving the triple goals of cost reduction, environmental protection and efficiency improvement.

Environmental compliance is major advantage of TR Solids Control systems. Adopting Shale Shaker + Desander + Desilter multi-stage purification process：Shale shaker intercepts particles above 1.5 mm，Desander separates 0.074–1.5 mm particles，Desilter focuses on 20–74 μm fine particles. Treated wastewater has suspended solid content ≤50 mg/L, allowing recycling or compliant discharge. Separated dry cuttings are recyclable, realizing zero-pollution discharge. The system is ISO14001 certified, ideal for urban pipeline network construction. Mud reuse rate can exceed 90% after remixing, significantly cutting new mud costs.

TR Solids Control HDD Mud Recycling System

1. Shale Shaker: Primary separation, removes large cuttings above 200 μm；

2. Desander: Separates sand particles of 40–74 μm；

3. Desilter: Separates fine mud of 20–40 μm；

4. Decanter Centrifuge: Separates ultra-fine particles of 2–5 μm；

5. Auxiliary Units: Mud tank, sand pump, agitator, mixing unit, electrical control system (explosion-proof / dust-proof / rain-proof).

In the future, TR Solids Control mud recycling systems will be upgraded toward modularization, miniaturization and low energy consumption, improving purification efficiency and resource utilization. We will adapt to more complex scenarios, continuously empower the green upgrading of infrastructure construction, and promote coordinated urban development and ecological protection.