Gas heater

About: Gas heater is a research topic. Over the lifetime, 1799 publications have been published within this topic receiving 6169 citations.

Automatic gas heater for printing presses

Abstract: This invention relates to new and useful improvements in an automatic gas heater for a printing press and a method for drying printed material. The invention proposes the use of gas burners to the front and to the rear of an extension delivery of a printing press, and a novel arrangement for...

Gas heater backwash and unburnt gas protector - consists of N-type semiconductor sensor with porous coating damping response

Abstract: A gas heater with a burner (2) and supply valve (7) has a reverse flow protection device in the exhaust return path operating the supply valve so as to rapidly and reliably close it if an exhaust gas backwash or build-up of unburnt gas occurs. This is achieved using an economical reliable device. The reverse flow protector (10) is a sensor consisting of an n-type semiconductor of tin dioxide. The sensor has an insulating coating which is only partially porous for gas. The coating consists of a porous ceramic mass or a fine-meshed metal grid. It ensures that the mechanism does not operate for a transient and therefore permissible build-up or backwash.

Flue gas treating method

Abstract: PROBLEM TO BE SOLVED: To miniaturize an electrostatic precipitator to make it low costed by a method wherein in that which eliminates dust and sulfur dioxide from a flue gas by using a dry electrostatic precipitator and a wet process line gypsum method desulphurizing equipment, a dust concentration of the flue gas coming out from the dry electrostatic precipitator to be introduced into an absorption tower, is set within a specific range SOLUTION: An untreated flue gas A1 from a coal-fired boiler 1 is at first introduced into an air heater to heat air B to be supplied to the boiler 1 Then, the flue gas A1 is introduced into a heat recovery part 3a of a gas heater, and heat is recovered After cooling, the flue gas is introduced into an electrostatic precipitator 4 Dust is removed from an inside of the flue gas A1, and a flue gas A2 of which a dust concentration is reduced to 100 mg/m N to 500 mg/m is exhausted Then, the flue gas A2 is introduced into a desulfurizing equipment, and sulfur dioxide is removed by absorption Besides, the dust is removed by being collected herein and thereafter, the flue gas is exhausted as a flue gas after treatment A3 The flue gas after treatment A3, after being heated with a reheating part 3b of the gas heater, is released from a stack

Apparatus for laying a bitumen joint

Abstract: The apparatus comprises a housing 2 supported for movement on at least two wheels 3A,3B,3C,3D a cauldron 4 and associated heater 5 for heating bitumen in the housing, a bitumen delivery nozzle 12 with a flow control valve 11 connected to the bottom of the cauldron and a positioning system 15 that supports the nozzle relative to the housing in variable positions. The heater is preferably a gas heater. A hot gas nozzle 16 may be provided with which hot gas can be applied to the bitumen delivery nozzle to melt any solidified bitumen. The positioning system may comprise a hydraulic rain. A delivery chamber 8 with a lid 8A may be provided above the cauldron with a removable hatch 9 separating the chamber from the cauldron. A safety rail may be provided around the apparatus. The housing preferably has four wheels and may be adapted to engage a truck/loader.

CO2 – Based transcritical Rankine cycle coupled with a ground-cooled condenser

Abstract: This paper presents a new system that incorporates the CO2-based transcritical Rankine cycle with a geothermal condenser. The innovation studied in the current proposed system is the use of a shallow ground heat exchanger to activate a ground-cooled condenser instead of an air-cooled one in a power cycle. This combination is very beneficial for power generation, especially in summer because the ground is more effective than the ambient air in extracting heat from the working fluid passing through the condenser due to its lower temperature. Thus, for the same amount of heat added to the cycle, more power could be produced due to the increase in pressure difference between the gas heater and condenser. Consequently, the operating cost of the system will be reduced. This parametric study covers a wide range of heat source applications with gas temperature and mass flow rate being varied between 500 and 1500 °C and 100–350 kg/hr respectively. The objective is to generate the maximum possible power while minimizing the sizes of the heat exchangers. The results show that the best parameters to be controlled are the turbine inlet temperature and CO2 pipe diameter. The incorporation of ground-cooled condenser significantly enhanced the cycle’s performance in which the net output power could be increased by ~ 30% compared to the conventional Rankine cycle. This enhancement mainly depends on the ground’s temperature since it directly changes the condensation temperature and hence affects the working fluid expansion.