Operating a natural gas (NG) processing plant, including receiving feed natural gas and processing the feed natural gas to give product natural gas. The processing includes removing acid gas, water, and non-methane hydrocarbons from the feed natural gas. In the NG processing plant, fuel is provided to a furnace and combusted in the furnace to heat a boiler and an HRSG to generate HP steam that drives a turbine to generate electricity and convert the HP steam to LP steam. Excess LP steam in the NG processing plant is subjected to electrolysis, thereby generating hydrogen gas, and the hydrogen gas combined with the fuel for combustion in the furnace.

An arrangement and a method in a soda recovery boiler. The soda recovery boiler comprises a second pass which is provided with at least one superheater and a second pass ash hopper, a front and/or rear wall of the ash hopper being connected to steam circulation of the soda recovery boiler.

A rural bulk organic waste pollutant source comprehensive treatment system including a solid high-temperature aerobic fermentation reactor, a liquid high-temperature aerobic fermentation reactor and a multifunctional boiler is provided. A rural bulk organic waste pollutant source comprehensive treatment method. For excretion waste of a livestock farm adopting the technology of manure cleaning by urine submerging, a solid-liquid separation is firstly performed thereto, wherein solid is conveyed to the solid high-temperature aerobic fermentation reactor and fermented to produce solid organic fertilizers, and liquid is conveyed to the liquid high-temperature aerobic fermentation reactor and fermented to produce liquid organic fertilizers. For dry collection manure of a livestock and poultry farm, carbon-containing auxiliary materials, residues left after dead animals and household waste being incinerated by the multifunctional boiler, and ash generated by straw burning are added thereto, and then the mixture is conveyed to the solid high-temperature aerobic fermentation reactor and fermented to produce solid organic fertilizers. Exhaust fume and hot water produced by the multifunctional boiler pass through the solid high-temperature aerobic fermentation reactor and the liquid high-temperature aerobic fermentation reactor to heat the reactors and keep the reactors warm.

The invention relates to a tool for generating steam and combustion gases for producing oil from an oil well. The tool includes a main body with a first end including a connection site for receiving a connection of an input line for fuel and/or water and an air inlet port configured to receive air from the atmosphere around the tool. The tool includes an ignition component arranged within the main body configured to ignite the air and the fuel to generate a flame. The tool includes a combustion chamber for accommodating the flame and extending at a second end of the main body opposite the first end, the combustion chamber defined by a wall and an outlet configured to allow exit of combusted products from the combustion chamber. The tool includes a passageway within the tool from the air inlet port to the combustion chamber.

Provided is a method for preparing steam, comprising: making a process waste heat fluid supplied from a plurality of waste heat sources flow into each of refrigerant evaporators having numbers corresponding to plurality of waste heat sources to vaporize a refrigerant through heat exchange; joining vaporized refrigerant streams from each of refrigerant evaporators to one integrated pipe; compressing refrigerant stream joined to integrated pipe in a refrigerant compressor; heat exchanging compressed refrigerant stream with water in a refrigerant condenser to prepare a condensed refrigerant stream and steam; and decompressing the condensed refrigerant stream by passing condensed refrigerant stream through a refrigerant expansion valve, followed by branching and circulating the condensed refrigerant stream to each of plurality of refrigerant evaporators, and further including transferring and compressing steam flowing out of refrigerant condenser to a steam compressor, and a system for recovering waste heat.

A steam generator for a fuel cell system having a heat exchanger (34) with at least one internal heat exchange surface, a water inflow pipe (46), a dripper head (52) with a flow passageway fluidly connected to the water inflow pipe (46). The dripper head (52) extends inside the heat exchanger (52) above the heat exchange surface for feeding water down onto the heat exchange surface for conversion into steam. The dripper head (52) has outlet holes (56) spaced along the flow passageway and between adjacent outlet (holes 56) the dripper head has a stepped profile on at least its underside to prevent droplets from adjacent holes coalescing. A fuel inflow pipe can have a section mounted coaxially to a part of the water inflow pipe (46). The fuel inflow pipe's section can surround the water inflow pipe's part. In a fuel cell system with a steam generator, the steam generator can include the fuel inflow pipe and a combined steam and fuel outlet and a reformer directly or indirectly connected downstream of the steam generator.