Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust emission control device which suppresses a cost increase due to complication of constitution or an increase in power consumption and efficiently protects an insulating insulator part, so that electric resistance can be prevented from being lowered due to adhesion of particulate matter.SOLUTION: Inside of a housing H of an electric dust collection part 1 is used as an exhaust passage 11 and corona discharge is generated in a discharge space 12 between a discharge electrode 3 and a dust collecting electrode 4. A cylindrical pipe part H1 is projected outward from the wall of the housing H and the inside of the cylindrical pipe part is used as an insulator chamber 5 opened to the discharge space and at least a part of the insulating insulator part 21 for supporting the discharge electrode 3 is housed therein. An air or water cooling part 6 is disposed to surround the outer peripheral wall of the insulator chamber 5. Temperature of the inner peripheral wall of the insulator chamber is lowered relatively to that of the insulating insulator part 21, so that particulate matter intruding into the insulator chamber 5 is moved to the inner peripheral wall surface of the insulator chamber 5 and collected by action of thermophoresis force.
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust treatment apparatus for collecting particulate matter in an exhaust gas of an internal combustion engine in a dust collector using corona discharge, in which deterioration in an insulation function of an insulator part of a discharge electrode due to sticking of particulate matter or moisture to the insulator part is prevented.SOLUTION: In the dust collector 1, a high voltage electrode 2 for discharge and an earth electrode 3 are arranged to be opposed to each other in a housing H connected to an exhaust pipe of the engine and the corona discharge is generated in a discharge space 12 to charge and aggregate the particulate matter. The high voltage electrode 2 is fixed to a swelled part H1 wall provided in the housing H and an outlet flow path 42 is formed by a gap between an opening part 41 of a cyclone chamber 4 formed in the swelled part H1 and an upstream side surface of the insulator part 21. Swirl flow generated in the cyclone chamber 4 is spouted from the outlet flow path 42 along the upstream side surface of the insulator part 21 to suppress the sticking of the particulate matter or the moisture itself.
Abstract:
PROBLEM TO BE SOLVED: To realize a safe and low-cost device with a simple structure by generating an electric field necessary for purifying exhaust particulates in the entire region of a discharge space with low voltage in a device for and burning these particulates by oxidization in the emission gas of an internal combustion engine by means of corona discharge.SOLUTION: An exhaust emission control device 1 has an inner peripheral wall of a cylindrical housing H connected with an emission flow path E1 of an engine E as a first ground electrode 31, and a second ground electrode 32 is disposed along the center of the housing. An electrode disk 21 of a high voltage electrode 2 is disposed between the first ground electrode 31 and second ground electrode 32 to cause its needle electrodes 24 on the inner and outer peripheries to face the electrodes. An interelectrode gap G between the high voltage electrode 2 and the first ground electrode 31 and second ground electrode 32 is constant, and the cylindrical part radius R of the housing H forming the discharge space 12 and the interelectrode gap G satisfy relation expressed by the cylindrical part radius R≥interelectrode gap G×3.
Abstract:
PROBLEM TO BE SOLVED: To provide an abnormality diagnostic device for an exhaust emission control device, diagnosing the presence or absence of abnormality regarding the exhaust emission control device employing a method for absorbing and removing a specific component in exhaust gas by using absorbing liquid. SOLUTION: This abnormality diagnostic device for an exhaust emission control device is applied to exhaust emission control devices 20, 30 which hold the absorbing liquid absorbing the contacted specific component when the absorbing liquid is brought into contact with the specific component (for example, NOx and CO2) in the exhaust gas, which are arranged in an exhaust pipe 11, and which absorb and remove the specific component by bringing the absorbing liquid into contact with the exhaust gas. The abnormality diagnostic device includes state sensors (ph sensors 22e, 32e) for detecting an absorbing liquid state. It is determined based on the detection values from the state sensors whether or not emission control functions by the exhaust emission control devices 20, 30 are abnormal. For example, when the amount of NOx absorbed in the absorbing liquid calculated based on the detection values from the state sensors is remarkably small with respect to NOx emissions discharged from a combustion chamber per predetermined time, it is determined that the emission control functions by the exhaust emission control devices are abnormal. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an electromagnetic wave heating device capable of maintaining a propagation mode of an electromagnetic wave in a specific mode to a change in physical property of a heated object by a simple configuration, and to provide an exhaust air cleaning device having the electromagnetic wave heating device.SOLUTION: An electromagnetic wave heating device 1 comprises: an electromagnetic wave generator 4 for oscillating at least a high-frequency electromagnetic wave; a cavity waveguide 2; an antenna 40 provided vertically to a longitudinal direction of the cavity waveguide 2; and electromagnetic wave reflection plates 5 and 6 provided at both ends of the cavity waveguide 2. In the electromagnetic wave heating device 1, a resonance cavity 20 is sectioned inside the cavity waveguide 2, and a dielectric heated object 3 housed inside the resonance cavity 20 is heated. In the reflection plate 5 that is an upstream side to the antenna 40 among the electromagnetic wave reflection plates 5 and 6, specific electric field shielding plates 7 protruding inward and shielding an electric field in a specific direction are provided.
Abstract:
PROBLEM TO BE SOLVED: To provide a new method for deciding existence of failure of a particulate filter with an electric-resistance-type exhausted-particulate sensor.SOLUTION: A single-mode microwave particulate combustion device 1 is installed on an exhaust pipe 2 of a diesel engine E. On the downstream side further than a connecting part with a transmission channel 4 of a microwave oscillated from a microwave power supply 3, a resonate part 5 which is formed between a variable slit 14 and a variable reflecting plate 15 is arranged, and a DPF (diesel particulate filter) 52 is accommodated. As a result, a PM (particulate matter) to be accumulated is burned and removed by microwave heating.
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine, having a function of automatically controlling an absorbing liquid so that an absorbing liquid state is maintained in an optimum state, in the exhaust emission control device employing a method for absorbing and removing a specific component in exhaust gas by using the absorbing liquid. SOLUTION: This exhaust emission control device for the internal combustion engine includes: a tank 31 storing the absorbing liquid absorbing contacted NOx when the absorbing liquid is brought into contact with NOx in the exhaust gas; and an exhaust gas contactor 32 arranged in an exhaust pipe 11, supplied with the absorbing liquid from the tank 31, and bringing the absorbing liquid into contact with the exhaust gas. The supply condition of the absorbing liquid from the tank 31 to the exhaust gas contactor 32 is controlled according to at least one of a NOx absorption rate with respect to the absorbing liquid in the exhaust gas contactor 32 and temperature of the absorbing liquid in the exhaust gas contactor 32. COPYRIGHT: (C)2011,JPO&INPIT