Information for ruling 600013326
This section is Advance Tariff Ruling
- Start date
- 24 Jul 2025
- Expiry date
- 23 Jul 2028
- Commodity code
- 8421398590 (opens in new tab)
- Description
- Direct Fired Thermal Oxidiser (DFTO) For Air Pollutants In Plastic Pyrolysis Plant Part of the design of Pyrolysis technology which is making PPO (Plastic Pyrolysis Oil) from chemically processing single use plastic. The Thermal Oxidiser will ensure that no hazardous gases are released into the atmosphere by burning any residual gas at a high temperature. The primary function of a thermal oxidizer is to treat air pollutants, known as Volatile Organic Compounds (VOCs), and Hazardous Air Pollutants (HAPs). These harmful gases are often byproducts of various industrial processes such as manufacturing, chemical processing, and oil and gas production. The operation of a thermal oxidizer is based on the principle of thermal oxidation, which uses high temperatures, typically ranging between 815°C (1500°F) and 980°C (1800°F), to promote a chemical reaction. This reaction involves the oxidation of hazardous organic compounds to form carbon dioxide and water vapor. The thermal oxidiser allows the burning of any excess SYN gasses produced via the plastic pyrolysis process for a minimum of 2 seconds at 850 degrees. The Oxidiser will be using LPG (Liquefied Petroleum Gas) to reach temperature when required. As a pyrolysis reactor alone cannot maintain a temperature of 850°C, a post-heating treatment system ensures the gaseous waste stream meets the Waste Incineration Directive by maintaining 850°C for the required 2 seconds. The primary air jets also ensure rapid mixing of air and gases in a turbulent flow to ensure total destruction of gaseous VOC’s. The Thermal oxidiser also has multiple secondary air jets along and around its combustion chamber to move heat away from the combustion chamber shell and ensure flame control within the chamber allowing the lengthening of its flame to support burnout of VOC gases. Both primary and secondary air jets combined ensure the flame is anchored and held within the combustion chamber to ensure the residence time achieves the required 2 seconds minimum at or above 850 ° C. The primary air jets in an incinerator must be able to support both solid and gas phase combustion (ash and gas) whereas in a thermal oxidiser there is only a requirement for gas/vapour phase pollutants, as there is no ash management needed. A steel stack structure, it is mainly made of steel along with some electrical components. A horizontal lining load consists of 200mm thick ceramic module and 25mm thick ceramic Fibre Blanket. A vertical lining load consists of 150mm thick ceramic module and 25mm thick ceramic Fibre Blanket.
- Keywords
-
- INCINERATORS
- OF STEEL
- FOR PURIFYING GASES
- WITH INNER LINING
- FOR INDUSTRIAL USE
- Justification
- Classification has been determined in accordance with the following: For the purposes of determining the commodity codes within which goods most appropriately fall, reg 3 (1) of The Customs Tariff (Establishment) (EU Exit) Regulations 2020 sets out that the rules of interpretation contained in the following have effect – a. Part Two (Goods Classification Table Rules of Interpretation) of the Tariff of the United Kingdom (Reg 3(1)(a)); and b. Notes to a section or chapter of the Goods Classification Table (Reg 3(1)(b)). GIR 1 has been used to classify this product by the terms of heading 8421: Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases GIR 6 has been used to classify the goods to subheading level 842139: Filtering or purifying machinery and apparatus for gases; Other than intake air filters for internal combustion engines or catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines 8 Digit code 84213985: Other than with stainless steel housing, and with inlet and outlet tube bores with inside diameters not exceeding 1.3 cm; Machinery and apparatus for filtering or purifying other gases; Other than by a catalytic process 10 Digit code 8421398590: Other than for use in civil aircraft Also classified in accordance with: Section Note 3 to Section XVI Harmonized System Explanatory Note (HSEN's) to heading 84.17 (13) Incinerators and similar apparatus specifically designed for the burning of waste, etc. Harmonized System Explanatory Note (HSEN's) to heading 84.21 (II) FILTERING OR PURIFYING MACHINERY AND APPARATUS, FOR LIQUIDS OR GASES (B) Filtering or purifying machinery, etc., for gases