Sand Dust Suppression via Polycationic Polymer Coating
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Solution Overview
Problem
The generation of dust from sand poses significant health hazards due to its respirable silica content, which can cause silicosis, and is a concern in various industries including construction, foundry, and hydraulic fracturing, with existing methods failing to effectively inhibit dust formation.
Innovation Solution
Coating sand with a polyionic polymer, such as polycationic polymers like polyallylamine hydrochloride or polyethyleneimine, to reduce dust generation by forming polyelectrolyte layers on the sand surface, which can be applied during transportation, storage, or at the wellsite.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sand is used in construction and industrial operations, then productivity and operational efficiency are improved, but dust generation increases causing health hazards
Solution Approach 1:
A polyionic polymer coating is applied as an intermediary substance between the sand particles and the surrounding environment. This coating acts as a mediator that prevents direct contact between sand dust and air, thereby reducing dust generation while allowing the sand to maintain its functional properties for construction and industrial operations.
Solution Approach 2:
The invention creates a composite material by combining sand particles with a polyionic polymer coating. This composite structure maintains the useful properties of sand for construction and industrial applications while the polymer coating suppresses dust generation, resolving the contradiction between productivity and harmful dust emission.
2Ease of operation
If sand is handled and transported, then material movement is achieved, but dust release increases exposing workers to harmful silica
Solution Approach 1:
The polyionic polymer coating serves as a protective intermediary layer between the sand particles and workers during handling and transport. This coating prevents silica dust from becoming airborne and contacting workers, thereby maintaining ease of operation while reducing harmful silica exposure.
3Reliability
If sand is used in hydraulic fracturing operations, then well treatment effectiveness is improved, but dust generation during transport and handling increases
Solution Approach 1:
The polyionic polymer coating acts as a protective intermediary that remains on sand particles during transport and handling operations in hydraulic fracturing. This coating prevents dust release while allowing the sand to maintain its effectiveness as a proppant in well treatment operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The polyionic coating significantly reduces dust formation during handling, transport, and use of sand, thereby minimizing health risks and improving operational conditions in dusty environments.
Implementation Method 1
coating sand with a polyionic polymer, such as polycationic polymers like polyallylamine hydrochloride or polyethyleneimine, to reduce dust generation by forming polyelectrolyte layers on the sand surface
Data Source
AI summary
A composite is characterized by particulates of sand wherein at least a portion of the surface of the particulates is coated with a polycationic polymer. The presence of the polycationic polymer on the surface of the particulates reduces the amount of dust generated during handling and use of the sand. The polycationic polymer further reduces the amount of dust generated during transport of the sand as well during manufacture, treatment or processing of the sand.