Code of practice for the management of air emissions from pulp and paper facilities
Table of contents
- Stationary sources of emission
- Recommended environmental protection practices
- 3.1 General practices
- 3.2 Chemical facility
- 3.2.1 HVLC and LVHC non-condensable gases
- 3.2.2 Wood handling and preparation
- 3.2.3 Pulping and delignification
- 3.2.4 Screening and washing of unbleached pulp
- 3.2.5 Bleaching
- 3.2.6 Drying
- 3.2.7 Concentration of spent pulping liquor
- 3.2.8 Recovery boilers
- 3.2.9 Smelt dissolving tank
- 3.2.10 Lime kiln
- 3.2.11 Preparation of chemicals
- 3.2.12 Boilers
- 3.3 Mechanical facility
- Annual air emission limits
- Meeting the limits
Environment and Climate Change Canada
Cat. No.: 978-0-660-26598-8
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Mention of trade names or commercial products does not constitute recommendation or endorsement for use.
This document does not purport to address all of the safety aspects associated with its use. Anyone using this document has the responsibility to consult the appropriate authorities and to establish health and safety practices in conjunction with any regulatory requirements prior to its use.
The code of practice for the management of air emissions from pulp and paper facilities outlines the operational activities for this industry and the environmental concerns related to the atmospheric emissions of sulphur dioxide (SO2) and total particulate matter (TPM). Emission limits and recommended practices that can address these concerns are also described.
Some, or all, of the provisions of the code of practice may be implemented voluntarily by the industry, or adopted as requirements by financial institutions or regulatory agencies; however, they do not negate any applicable regulatory requirements.
- An enclosed device which uses controlled flame combustion and is designed to transfer thermal energy from the combustion of a fuel indirectly to a fluid (such as water or oil.)
- Chemical facility
- Any pulp and paper facility that is designed to operate a recovery boiler, a lime kiln or a pulping digester.
- Continuous Emissions Monitoring System (CEMS)
- Equipment for automated sampling, conditioning or analyzing of emissions from a given source and the recording of data related to those emissions.
- A pressure vessel used to chemically treat chips and other cellulosic fibrous materials under elevated temperature and pressure in order to separate fibres from each other and produce pulp.
- Dissolving tank
- Equipment that collects molten smelt from the recovery boiler’s furnace hearth and dilutes it, usually with water or weak wash from the washing of lime mud and green liquor dregs.
- High-volume, low-concentration (HVLC) non-condensable gases
- Gases with low total reduced sulphur (TRS) content. HVLC non-condensable gases typically come from washers, filtrate tanks, knotters, screens, deckers, oxygen delignification systems, weak liquor storage tanks, and intermediate pulp storage chests. Also known as diluted non-condensable odorous gases (DNCGs).
- Lime kiln
- Equipment used to calcine lime mud, which contains calcium carbonate (CaCO3) and water, in order to form lime (CaO) and CO2.
- Low-volume, high concentration (LVHC) non-condensable gases
- Gases with high total reduced sulphur (TRS) content. LVHC non-condensable gases typically come from blow heat recovery systems, turpentine recovery systems, digester areas, evaporators, and steam strippers. Also known as concentrated non-condensable gases (CNCGs).
- Mechanical facility
- Any pulp and paper facility that is not a chemical facility.
The operator of a pulp and paper facility is an authorized official who:
- in respect of a corporation, is an officer of the corporation who is authorized to act on its behalf;
- in respect of any other person, is that person or a person authorized to act on behalf of that person; and
- in respect of any other entity, is a person authorized to act on its behalf.
- Other stationary combustion source
- Any stationary combustion equipment with a nominal heat capacity greater than 10.5 gigajoules per hour (GJ/h) that was operated more than 500 hours in the year of declaration.
- Pulp and paper facility
“Pulp and paper facility” means a facility that is designed or used to produce
- (a) pulp products from wood, other plant material or recycled paper products; and
- (b) any other product obtained from a pulping process or directly derived from pulp.
- Recovery boiler
- Equipment that burns spent pulping liquor to allow for the recovery of cooking chemicals.
- Stripper off-gases (SOGs)
- gases leaving a steam or air stripper column that treats foul condensates.
- Thermal oxidizer
- Device used to destroy liquid, solid or gaseous matter through combustion, without recovering the energy produced.
- Total particulate matter (TPM)
- Airborne particulate matter with an upper size limit of approximately 100 micrometres (µm) in aerodynamic equivalent diameter. Only the filterable portion is considered in this code of practice.
List of abbreviations
- Air Quality Management System
- Base Level Industrial Emission Requirements
- calcium carbonate
- calcium oxide, lime
- Canadian Council of Ministers of the Environment
- continuous emissions monitoring system
- chemi-mechanical pulping
- concentrated non-condensable gases
- carbon monoxide
- carbon dioxide
- diluted non-condensable gases
- gigajoules per hour
- sulphurous acid
- High-volume, low-concentration non-condensable gases
- ISO 14000
- International Organization for Standardization, environmental management
- Low-volume, High-concentration non-condensable gases
- sodium carbonate
- odium sulphide
- sodium sulphite
- sodium hydroxide
- non-condensable gases
- nitrogen oxide
- pressure groundwood pulping
- pressure refiner mechanical pulping
- refiner mechanical pulping
- stone groundwood pulping
- sulphur dioxide
- stripper off-gases
- thermo-mechanical pulping
- total particulate matter
- total reduced sulphur
- volatile organic compounds
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