摘要:
A system includes a heat recovery steam generator (HRSG) having a plurality of evaporator sections. At least one evaporator section includes a forced circulation evaporator configured to generate a saturated steam, a once-through evaporator configured to generate a first superheated steam, and a first superheater configured to receive the saturated steam and the first superheated steam.
摘要:
The invention relates to a method for controlling ORC stacks with a total number ntot of individually operable ORC modules, said method comprising the following steps: determining the running time remaining until the next servicing time for each operable ORC module respectively; determining a target number nsoll of ORC modules to be operated; comparing said target number nsoll to an actual number nist of currently operated ORC modules; when nsoll>nist, connecting a number nsoll−nist of ORC modules that corresponds to the difference between the target number and the actual number, where the ORC modules with the longest remaining running times of the ORC modules currently not being operated are connected; and/or when nsoll Δt2.
摘要:
Methods and systems are described for improving the efficiency and reducing the carbon intensity of transportation fuels produced from heavy oil extracted with the steam injection process, by replacing natural gas from fossil fuel sources with a substitute renewable gas produced from solid carbonaceous materials while co-producing a solid carbonaceous byproduct.
摘要:
A multistage boiler heat exchange apparatus has a combustion furnace and at least one boiler set. The combustion furnace is used to produce a heat source and has a furnace base and a hot-air passage. The at least one boiler set is connected to the combustion furnace, and each has a preheater and a boiler. The preheater is deposited adjacent to the combustion furnace, and is connected to and communicates with the hot-air passage to adjust temperature of the heat source that enters the preheater. The boiler is an uprightly-deposited cylinder, is connected to the preheater, and has a conducting pipe and an exchange tube. The conducting pipe is deposited on and communicates with the boiler to enable the heat source to enter the boiler. The exchange tube is deposited in the boiler and has an exchange medium to exchange heat with the heat source in the boiler.
摘要:
Waste liquor from cellulose pulp processes is used in a recovery boiler to recover energy and chemicals. The recovery boiler includes a furnace section in which heat and exhaust gases are generated, and heat recovery surfaces downstream of the furnace section in a path of exhaust gas movement. Waste liquor is injected into the furnace section of the recovery boiler at a first location, and the exhaust gases produced are divided into at least first and second streams. The first stream is passed into association with the heat recovery surfaces of the recovery boiler and then discharged, while the second stream is withdrawn from the recovery boiler at a second location between the first location and the heat recovery surfaces. The withdrawn second stream is positively cooled exteriorly of the recovery boiler preferably utilizing a circulating bed cooler. An electric precipitator removes particulates from the first exhaust gas stream downstream of the heat recovery surfaces, and from the second gas stream downstream of the cooler. The second gas stream is preferably removed from the furnace section between a tertiary air inlet and a nose, and third, fourth, or even more, exhaust gas streams are preferably also removed from the furnace section between the first location and the heat recovery surfaces. Utilizing the invention the capacity of an existing recovery boiler can be inexpensively and effectively increased.
摘要:
A system includes a heat recovery steam generator (HRSG) having a plurality of evaporator sections. At least one evaporator section includes a forced circulation evaporator configured to generate a saturated steam, a once-through evaporator configured to generate a first superheated steam, and a first superheater configured to receive the saturated steam and the first superheated steam.
摘要:
A hot water tank comprising a sleeve, a removable top lid, at least one changeable water holding compartment adapted to be stacked vertically within the sleeve, stacked compartments being connected by a connecting pipe and at least one heating means provided with one of the compartments. The changeable compartments are configured to be removable from the sleeve upon removal of the top lid in case of failure and the space between the sleeve and the changeable compartments is adapted to hold the contents of the compartments during a leak.
摘要:
A hot water boiler having a dual combustion chamber arrangement capable of burning either solid or fluid fuels, and arranged for acting directly on a heat transfer system generally in direct contact with firebox walls of the combustion chamber arrangement. Disposed atop the combustion chamber arrangement is a heat conserving flue assembly which absorbs heat from smoke and flue gases exhausted from the combustion chamber arrangement and heats a fluid medium which in turn is circulated to the heat transfer means for eventual release for circulation or storage as desired in a residence or other building structure. The heat transfer system includes a fluid containing cavity divided into two parts by a suitable membrane, with pipes being provided penetrating the membrane for permitting transfer of the fluid medium from one part of the cavity to the other, with the heat transfer fluid medium thus being initially heated in the flue assembly, transferred to a first, or uppermost, part of the cavity of the heat transfer system, and subsequently transferred to the lower part of the heat transfer system and discharged entirely from the boiler structure.
摘要:
An economizer device for fully exploiting the thermal output of central heating installations for heating fluids that incorporates a source of heat herein called "heating fluid" and a source of fluid circulating between a cold zone and a warm zone, herein called "heated fluid," a conduit leading the heated fluid coming from the cold zone into a transfer chamber containing the heating fluid to store there a portion of the thermal energy of this heating fluid and to transfer it to the warm zone. The device is characterized in that the maximum proportion of thermal energy of the heating fluid is removed, before the latter leaves the transfer chamber, by storing this energy by means of appropriate elements disposed in the chamber, this stored energy being restored to the heated fluid either in the chamber itself or immediately the heated fluid leaves the chamber in order to pass into the warm zone.