Connection tube support of waste heat recovery boiler and waste heat recovery boiler including same

A waste heat recovery boiler, the boiler comprising:

• a casing part providing a flow path through which exhaust gas flows;
• a connection tube unit disposed inside the casing part and having a plurality of connection tubes provided to be perpendicular to a flow direction of the exhaust gas inside the casing part, the connection tube unit configured to perform heat exchange between a fluid flow inside the connection tube unit and the exhaust gas;
• and
• a connection tube support supporting the connection tube unit,
• wherein the connection tube support comprises:
• a header storing fluid flowing through the connection tube unit and supporting one end of the connection tube unit by being connected to one end of the connection tube unit;
• and
• a tube sheet supporting a circumferential surface of each of the plurality of connection tubes,
• wherein the tube sheet has the plurality of connection tubes passing therethrough and is provided with a plurality of support holes respectively supporting circumferential surfaces of the plurality of connection tubes passing therethrough,
• wherein the casing part comprises:
• at least two casings separated from each other,
• wherein the casings separated from each other are connected by mediation of a thermal expansion absorbing member capable of absorbing deformation due to thermal expansion.