DPF Cleaning by Tech Sonic

Proprietary ash and soot removal system for on-road diesel particulate filter systems

This report summarizes the results of method development and testing regarding the impact of ultrasonic cleaning on the catalytic “wash coat” of fouled diesel particulate filters (DPF’s). As DPF’s become more prevalent in diesel powered vehicles, a means to effectively and quickly clean units fouled with soot and ash is of increasing importance in fleet maintenance. Tech Sonic Services has developed a method which employs ultrasound and a proprietary aqueous cleaning fluid to assist in the removal of ash/soot from the channels of “wall flow” DPF units.

The test also suggested that the cleaning process removed 100% of the accumulated ash/soot (within the estimated experimental uncertainty of 5%).

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Tech Sonic Applications vs. Conventional Water Blasting

The Effective Removal of Iron Carbonate Fouling in Heat Exchangers in Ammonia Production Sites DPF Cleaning by Tech Sonic

The use of Tech Sonic applications will generate a massive savings in water usage and waste water creation versus conventional water blasting. In documented cases, water savings are in excess of 90% at a plant in North America and +86% at a petrochemical facility in Europe, creating savings ranging from $5MM US and $750K US accordingly. The return on investment from environmental savings alone for the North American refinery was over 13:1 and the European petrochemical plant was 5:1.

Budapest FeCO3

Addressing the problem of ferrous carbonate fouling and removal

This paper examines the problem of ferrous carbonate ruling and removal in lean – rich Diethanolamine exchangers at the CO2 extraction plants associated with ammonia manufacturing. A method to clean the exchangers using a solution of a proprietary acid mixture applied by ultrasonic chemical cleaning is described. We discuss an effective and safe ultrasonic cleaning method deployed in 5 separate cleaning projects.


The use of ultrasonic technology for cleaning refinery process components has been taking place for over a decade. The use of this in a large scale application for cleaning heat exchangers however, is relatively recent, taking place over the past 4 years. The mechanisms of this technology are described in (B.Kieser et al., 2011).

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Conoco Phillips Tech Sonic Case Study 040512

New approach prepares hydrofluoric (HF) acid service valves for servicing/rebuilding

ConocoPhillips is one of the largest refiners in the United States. Its Ponca City, Oklahoma Refinery, with a crude oil processing capacity of 187 Thousand Barrels per Day, processes a mixture of light, medium and heavy crude oil to produce a full range of products, including gasoline, diesel fuel, jet fuel, LPG and anode-grade petroleum coke. Its facilities include fluid catalytic cracking, delayed coking and hydrodesulphurization units.
The refinery includes a hydrofluoric (HF) alkalization unit, with hundreds of hydrofluoric acid service valves that require periodic cleaning to remove iron fluoride and nickel fluoride scale, depending on the base metal, as well as rebuilds.

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