The disclosure includes a water system that includes a feed water heat exchanger including a feed water heat exchanger above a water collection tank and a feed water heat exchanger/steam generator connected to the feed water heat exchanger. The feed water heat exchanger/steam generator includes a heat exchanger, coils, boiler burners, and emissions control. The water system includes a brine/waste water feed water heat exchanger positioned within brine/waste water tank enclosure, which includes a brine/waste water tank that is in fluidic connection with the feed water heat exchanger/steam generator. The water system includes a preheater in fluidic connection with the brine/waste water feed water heat exchanger, and a post-preheater heat exchanger enclosure including a post-preheater heat exchanger, post-preheater coils, post-preheater burner and post-preheater emissions control, the post-preheater heat exchanger in fluidic connection with the pre-heater. The water system includes a vapor removal device in fluidic connection with the post-preheater heat exchanger.

Proposed is a connection tube support of a waste heat recovery boiler supporting a connection tube unit having a plurality of connection tubes that is disposed inside a waste heat recovery boiler and perform heat exchange between a fluid flowing inside and exhaust gas flowing outside, wherein the connection tube support includes 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 having been passed therethrough and is provided with a plurality of support holes respectively supporting circumferential surfaces of the plurality of connection tubes having been passed therethrough.

A method for using untreated produced water to generate steam and simultaneously producing diluents is disclosed. The method includes a combustion process for generating steam for hydrocarbon recovery using untreated water and, an optional process for recovering combustion byproducts to assist in hydrocarbon recovery or solvent injections. Specifically, a novel combustion method and a double-tube heat exchanger are used to generate steam while minimizing or eliminating water treatment steps and boiler fouling. Low value pitch, also known as asphalt, is used for combustion fuel. In addition to the steam generation, byproducts of the combustion process can be utilized in solvent injections or as a diluent.

Proposed is a connection tube support of a waste heat recovery boiler supporting a connection tube unit having a plurality of connection tubes that is disposed inside a waste heat recovery boiler and perform heat exchange between a fluid flowing inside and exhaust gas flowing outside, wherein the connection tube support includes 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 having been passed therethrough and is provided with a plurality of support holes respectively supporting circumferential surfaces of the plurality of connection tubes having been passed therethrough.

The invention relates to a process gas waste heat boiler (PGWHB) of the single-pass and straight-tube type and having thin flexible tube sheets being provided with a weld overlay or cladding, particularly process gas waste heat boilers for the recovery of heat from a process gas, in which the process gas is synthesis gas exiting a steam reforming unit.