Seeking advice on explosion-proofing issues in areas where fuel gas is used in boiler combustion
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As stated in the title, a small amount of fuel gas (with components of H2, CO, and CO2) is considered for use in CFB boilers； With a CO2 content of 96% v), what are the regulatory requirements for classifying areas as explosion-proof in the boiler area?
There’s no need to draw explosion zones in the boiler room
The boiler room shouldn’t be divided, but are there any leakage areas in the piping area?
Are there valves on the pipeline (leak sources)? If not, there is no need to draw them. If there are: 1. In an area with good outdoor ventilation, no drawing is necessary. 2. In an indoor area with good ventilation and no open flames, it is Zone 2. 3. In an indoor area with poor ventilation and no open flames, it is Zone 1. All of the above are in accordance with Article 22 of Appendix B of GB50058-2014.
Since the entire boiler room is located in a confined space, must it be classified as Zone 2 or Zone 1? Are there any distance range requirements?