Abstract: A combustion-type exhaust gas treatment apparatus has a combustion treatment chamber for treating exhaust gas by combusting and decomposing the exhaust gas, a main burner for forming a flame in the combustion treatment chamber by supplying a mixture gas produced by premixing a fuel gas and an oxidizing gas, and a scraper for scraping off solid matters adhering to an inner wall of the combustion treatment chamber. The mixture gas is adjusted within combustion range and supplied to the main burner during treatment for treating the exhaust gas by combusting and decomposing the exhaust gas when the scraper is not in operation, and the mixture gas is adjusted outside combustion range and supplied to the main burner during treatment for treating the exhaust gas by combusting and decomposing the exhaust gas when the scraper is in scraping operation.

Abstract: A combustion-type exhaust gas treatment apparatus is used to treat a harmful exhaust gas by combustion to render the gas harmless. The treatment apparatus includes a combustion treatment section, a cooling section, and a washing section. The combustion treatment section includes an exhaust-gas treatment combustor, a body made from metal and having a roughened inner surface, and a water-film formation mechanism adapted to form a water film on the inner surface of the body. The combustion treatment of the exhaust gas is performed in the body.

Abstract: An exhaust gas cleaning apparatus according to the present invention includes a wall member configured to form a gas passage for allowing an exhaust gas to pass therethrough, and a mist nozzle and a water film nozzle disposed in the gas passage. The mist nozzle forms mist in the gas passage, and the water film nozzle forms water film in the gas passage. The mist nozzle is disposed further toward the upstream side in a flowing direction of the exhaust gas than the water film nozzle. Plural sets of the mist nozzle and the water film nozzle may be provided.

Abstract: The present invention relates to a combustion-type exhaust gas treatment apparatus which can be operated continuously over a prolonged period of time by operating a scraper (30) for scraping off solid matters adhering to an inner wall of a combustion treatment chamber (1) during combustion treatment of an exhaust gas. The combustion-type exhaust gas treatment apparatus has a combustion treatment chamber (1) for treating the exhaust gas by combusting and decomposing the exhaust gas, a main burner (MB) for forming a flame in the combustion treatment chamber (1) by supplying a mixture gas produced by premixing a fuel gas and an oxidizing gas, and a scraper (30) for scraping off solid matters adhering to an inner wall of the combustion treatment chamber (1).

Abstract: A scrubber removes dust from an exhaust gas. The scrubber includes a casing having an exhaust gas inlet and an exhaust gas outlet, an impeller housed in the casing and supported by a shaft, and a cleaning liquid supply tube for ejecting a cleaning liquid by which the dust contained in the exhaust gas is captured. The scrubber further includes a plurality of protrusions provided around the impeller such that the exhaust gas and the cleaning liquid which are discharged from the impeller impinge upon the protrusions.

Abstract: An exhaust gas cleaning apparatus according to the present invention includes a wall member configured to form a gas passage for allowing an exhaust gas to pass therethrough, and a mist nozzle and a water film nozzle disposed in the gas passage. The mist nozzle forms mist in the gas passage and the water film nozzle forms water film in the gas passage. The mist nozzle is disposed further upstream side in a flowing direction of the exhaust gas than the water film nozzle. Plural sets of the mist nozzle and the water film nozzle may be provided.

Abstract: A combustion-type exhaust gas treatment apparatus is used to treat a harmful exhaust gas by combustion to render the gas harmless. The present invention provides such a combustion-type exhaust gas treatment apparatus. This treatment apparatus includes a combustion treatment section, a cooling section, and a washing section. The combustion treatment section includes an exhaust-gas treatment combustor, a body made from metal and having a roughened inner surface, and a water-film formation mechanism adapted to form a water film on the inner surface of the body. The combustion treatment of the exhaust gas is performed in the body.

Abstract: The present invention provides a burner for use in a combustion-type waste gas treatment system for combusting waste gases emitted from semiconductor manufacturing system, particularly, a deposition gas containing SiH4 and a halogen-base gas, simultaneously at a high efficiency of destruction, making it difficult for a powder of SiO2 to be attached and deposited, performing a low-NOx combustion, and maintaining a desired level of safety. The combustion-type waste gas treatment system has a flame stabilizing zone (15), which is open toward a combustion chamber (11), surrounded by a peripheral wall (12), and closed by a plate (14) remotely from the combustion chamber. A waste gas, an auxiliary combustible agent, and air are introduced into and mixed with each other in the flame stabilizing zone (15), and the mixed gases are ejected toward the combustion chamber (11) perpendicularly to the plate (14).

Abstract: A scrubber removes dust from an exhaust gas. The scrubber includes a casing having an exhaust gas inlet and an exhaust gas outlet, an impeller housed in the casing and supported by a shaft, and a cleaning liquid supply tube for ejecting a cleaning liquid by which the dust contained in the exhaust gas is captured. The scrubber further includes a plurality of protrusions provided around the impeller such that the exhaust gas and the cleaning liquid which are discharged from the impeller impinge upon the protrusions.

Abstract: A waste gas treatment system having a burner part and a combustion chamber provided at a downstream side of the burner part. Combustion flames are formed from the burner part toward the combustion chamber, and a waste gas is introduced into the combustion flames, thereby oxidatively decomposing the waste gas. The combustion chamber is formed from an inner wall made of a fiber-reinforced ceramic material. Therefore, the wear of the inner wall due to heat and corrosion is minimized, and thermal stress cracking is also reduced. Consequently, the lifetime of the system increases, and the cost of equipment and the availability factor can be improved. In addition, because the inner wall exhibits no catalytic effect, the formation of thermal NOx is suppressed, and it is possible to achieve environmental preservation and to simplify the treatment equipment.

Abstract: A scrubber removes dust from an exhaust gas. The scrubber includes a casing having an exhaust gas inlet and an exhaust gas outlet, an impeller housed in the casing and supported by a shaft, and a cleaning liquid supply tube for ejecting a cleaning liquid by which the dust contained in the exhaust gas is captured. The scrubber further includes a plurality of protrusions provided around the impeller such that the exhaust gas and the cleaning liquid which are discharged from the impeller impinge upon the protrusions.

Abstract: The present invention provides a burner for use in a combustion-type waste gas treatment system for combusting waste gases emitted from semiconductor manufacturing system, particularly, a deposition gas containing SiH4 and a halogen-base gas, simultaneously at a high efficiency of destruction, making it difficult for a powder of SiO2 to be attached and deposited, performing a low-NOx combustion, and maintaining a desired level of safety. The combustion-type waste gas treatment system has a flame stabilizing zone (15), which is open toward a combustion chamber (11), surrounded by a peripheral wall (12), and closed by a plate (14) remotely from the combustion chamber. A waste gas, an auxiliary combustible agent, and air are introduced into and mixed with each other in the flame stabilizing zone (15), and the mixed gases are ejected toward the combustion chamber (11) perpendicularly to the plate (14).

Abstract: The present invention provides a burner for use in a combustion-type waste gas treatment system for combusting waste gases emitted from semiconductor manufacturing system, particularly, a deposition gas containing SiH4 and a halogen-base gas, simultaneously at a high efficiency of destruction, making it difficult for a powder of SiO2 to be attached and deposited, performing a low-NOx combustion, and maintaining a desired level of safety. The combustion-type waste gas treatment system has a flame stabilizing zone (15), which is open toward a combustion chamber (11), surrounded by a peripheral wall (12), and closed by a plate (14) remotely from the combustion chamber. A waste gas, an auxiliary combustible agent, and air are introduced into and mixed with each other in the flame stabilizing zone (15), and the mixed gases are ejected toward the combustion chamber (11) perpendicularly to the plate (14).

Abstract: A scrubber removes dust from an exhaust gas. The scrubber includes a casing having an exhaust gas inlet and an exhaust gas outlet, an impeller housed in the casing and supported by a shaft, and a cleaning liquid supply tube for ejecting a cleaning liquid by which the dust contained in the exhaust gas is captured. The scrubber further includes a plurality of protrusions provided around the impeller such that the exhaust gas and the cleaning liquid which are discharged from the impeller impinge upon the protrusions.

Abstract: A waste gas treatment system having a burner part and a combustion chamber provided at the downstream side of the burner part, wherein combustion flames are formed from the burner part toward the combustion chamber, and a waste gas is introduced into the combustion flames, thereby oxidatively decomposing the waste gas. The combustion chamber is formed from an inner wall made of a fiber-reinforced ceramic material. Therefore, the wear of the inner wall due to heat and corrosion is minimized, and thermal stress cracking is also reduced. Consequently, the lifetime of the system increases, and the cost of equipment and the availability factor can be improved. In addition, because the inner wall exhibits no catalytic effect, the formation of thermal NOx is suppressed, and it is possible to achieve environmental preservation and to simplify the treatment equipment.

Abstract: A video camera capable of switching an aspect ratio and an electronic view finder for use in the same. In response to a switching control signal from an aspect ratio switching circuit, a video signal having a different degree of horizontal compression and an aspect switching control signal are fed to the view finder, a magnetic recording/reproducing circuit and an external device. The magnetic recording/reproducing circuit simultaneously records the video signal and the switching control signal. In reproduction, the magnetic recording/reproducing circuit reproduces and outputs the recorded switching control signal. In response to the switching control signal, the external device changes the deflection angle of a built-in display circuit and switches the aspect ratio to display the video signal.

Abstract: During the playback operation for freezing and storing a specific frame of a picture in a memory and thereafter printing the frame, the recording medium is turned reversely for a prescribed amount according to an instruction from a printer in response to the entry of the freeze command in order to accurately search the frame at the entry of the freeze, and thereafter the recording medium is played back in normal mode. The amounts of reverse turn and the successive forward turn in normal playback are counted and compared, and when the difference has become a prescribed value, a freeze signal is produced and the frame of the picture selected by the freeze command is stored in the memory and printed when required. This control method for use in a video print system is designed so that the recording medium is turned reversely for a prescribed amount according to an instruction from the printer and then stopped until the next command is entered.

Abstract: In a two-head helical scan type video signal recording and reproducing apparatus, gaps of the two heads are angled to each other to increase a record density. In such an apparatus, when the recorded signal is reproduced while the magnetic tape is stationary, that is, in a still image reproduction mode, the signal on the track recorded by the head having a different gap angle is not reproduced by that head. When the magnetic tape is stopped, the trace locus of the head does not align with the record track, which makes the reproduction of high quality of still image difficult. In the still image reproduction mode, tracking is improved to enable the reproduction of a high quality still image signal by displacing the heads transversely to the direction of trace.

Abstract: A signal multiplexing method and system for transmitting a television signal by a narrow-band transmission medium incapable of transmitting d.c. components. In this method, a two-polarity pulse train signal consisting of pulses of alternately inverted polarities is subject to pulse modulation by the video information only of the television signal. The horizontal and vertical synchronizing signals indicative of the beginning of a line, field or the like are coded in such a form that some of the successive pulses in the pulse train signal have the same polarity.