Abstract: To facilitate the vaporization of additives added upstream of a selective catalytic reduction device and to suppress their precipitation.

Abstract: To provide an exhaust gas purification catalyst that is less likely to cause an increase in pressure loss, even a large amount of zeolite-based SCR catalyst is used to improve NOx purification capability. The exhaust gas purification catalyst includes a DPF provided with zeolite having a primary particle size equal to or less than 0.5 ?m. In addition, it is preferable that 50% particle size of the zeolite measured by dynamic light scattering is equal to or less than 2.0 ?m, and further, it is preferable that the 90% particle size of the zeolite is equal to or less than 2.5 ?m.

Abstract: To provide an exhaust gas purification catalyst that is less likely to cause an increase in pressure loss, even a large amount of zeolite-based SCR catalyst is used to improve NOx purification capability. The exhaust gas purification catalyst includes a DPF provided with zeolite having a primary particle size equal to or less than 0.5 ?m. In addition, it is preferable that 50% particle size of the zeolite measured by dynamic light scattering is equal to or less than 2.0 ?m, and further, it is preferable that the 90% particle size of the zeolite is equal to or less than 2.5 ?m.

Abstract: To provide an exhaust gas purification catalyst capable of achieving both PM collection capability and NOx purification capability even with the use of a large amount of zeolite-based SCR catalyst. The exhaust gas purification catalyst includes a DPF substrate provided with a slurry. The slurry has a viscosity equal to or less than 20 mPa·s at 25° C. and is prepared using a Cu-containing zeolite having a primary particle size equal to or less than 0.5 ?m.

Abstract: An oil separator that separates mist oil from processing-target gas containing mist liquid includes a plurality of separation disks. The plurality of separation disks rotate around an axis, and are stacked and spaced in an axial direction. The separation disk includes an inner peripheral part and an outer peripheral part. The inner peripheral part forms a surface of a frustum of a hypothetical cone or pyramid coaxial with the separation disk, and is inclined with respect to a radial direction toward one side in an axial direction. The outer peripheral part forms a surface of a frustum of a hypothetical cone or pyramid coaxial with the separation disk, and continuously extends outward from an outer peripheral edge of the inner peripheral part. The outer peripheral part is inclined with respect to the radial direction toward another side in the axial direction.

Abstract: An oil separator separating mist oil from processing-target gas includes: a case, a first partition wall and a lower, second partition wall, both partitioning vertically an internal space of the case; a partition dividing a space between the first and second partition walls into an introduction path and a first chamber; a supply hole vertically penetrating the second partition wall from the introduction path to a separation chamber; a communication hole vertically penetrating the second partition wall from the first chamber to the separation chamber; a rotor in the separation chamber; a center-side space in a center part of the rotor, the center-side space communicating with the supply hole through an open, upper part of the center-side space. The rotor separates the mist oil from the processing-target gas flowing from the center-side space to an outer periphery of the rotor, where the separated oil is emitted. The processing-target gas flows into the first chamber through the communication hole.

Abstract: An oil separator includes: a spindle; a rotor rotable together with the spindle and having an inner peripheral space, the rotor configured to be rotated by introducing, into the inner peripheral space, separating oil and processing-target gas containing mist oil so that the mist oil is separated from the processing-target gas; a case having an internal space and an inlet hole communicating with the internal space, the internal space housing a separation chamber having the spindle and the rotor; and a lower partition wall member disposed in a lower end of the internal space and provided with a through hole penetrating a center of the lower partition wall member in an up-down direction, the spindle being inserted into the through hole.

Abstract: A heat exchanger includes: a stack formed by stacking a plurality of tubes through which gas flow; a tubular inner tank in which the stack is housed; and a tubular outer tank that is mounted on the outside of the inner tank so as to define an inner space between the outer tank and an outer peripheral surface of the inner tank. Each of both end portions of the tubes has a thickness greater than each of middle portions of the tubes. The both end portions of the tubes adjacent to each other in the stack are joined together so as to form a clearance between the middle portions of the adjacent tubes in the stack. Outer peripheries of both end portions of the stack are joined to an inner peripheral surface of the inner tank. An introduction hole for introducing a cooling medium is formed in the outer tank.

Abstract: The present invention is directed to solve problems in conventional HC-SCR systems and provide cost-effective exhaust gas treatment systems with high NOx removal rates especially at low temperatures. A hydrocarbon selective catalytic reduction (HC-SCR) system in which H2 is added to a diesel oxidation catalyst (DOC) along with hydrocarbon. In other words, it can be said as an exchange gas purification method including removing NOx from an exhaust gas by adding H2 to a diesel oxidation catalyst (DOC) along with hydrocarbon in a hydrocarbon selective catalytic reduction (HC-SCR) system.

Abstract: In an oil separator that separates mist oil contained in target gas from the gas, the present disclosure is aimed to easily mount the oil separator to various targets and to increase its versatility. An oil separator according to the present disclosure includes: a nozzle that injects oil from an injection hole to rotate a spindle around an axis; a housing having a gas communicating portion and an oil communicating portion on its bottom; and a joint member that is removably mounted to the housing, and that includes a gas introducing portion and an oil discharge portion, the gas introducing portion introducing blow-by gas and transferring the gas to the gas communicating portion, the oil discharge portion receiving oil from the oil communicating portion and discharging the oil to outside.

Abstract: An oil mist filter includes: a filter body having a tubular shape, the filter body causing processing-target gas supplied to a hollow in the filter body pass through an outer peripheral surface to capture oil mist contained in the processing-target gas; and an end plate disposed at one end surface of the filter body the end plate projecting outward beyond an outer peripheral edge of the one end surface of the filter body. A plurality of ventholes are formed at a portion of the end plate projecting beyond the outer peripheral edge of the one end surface of the filter body. The processing-target gas blown out from the outer peripheral surface of the filter body passes through the ventholes.

Abstract: An oil separator configured to separate from gas mist oil contained in target gas of the present invention is aimed to enhance separation efficiency of oil mist contained in target gas while reducing the weight of the separation disks. The oil separator of the present invention includes a rotor. This rotor has a plurality of separation disks 34 (61, 62) layered along the axis line of the spindle. Each of the separation disks 34 are configured with truncated cone shape plate members and have formed concavo-convex ribs 64, 65 extending from the rotational center in the radiation direction on the outer peripheral side parts 61b, 62b corresponding to the inclined surfaces of the truncated cone.

Abstract: A lower partition wall having a through hole vertically penetrates the lower partition wall center. A spindle is inserted into the through hole. The top surface side of the lower partition wall includes a convex portion, a groove, and a drain hole. The convex portion is concentrically disposed at the through hole periphery. The groove extends, from an outer peripheral side of the convex portion, toward the through hole on an inner peripheral side. The drain hole is outside the convex portion, vertically penetrating the lower partition wall. The separated oil circles a top surface of the lower partition wall. The oil flowing to an inner peripheral side of the lower partition wall is guided to the groove and flows into the through hole. The oil flowing to an outer peripheral side of the lower partition wall flows into the drain hole.

Abstract: A heat exchanger includes: a stack formed by stacking a plurality of tubes through which gas flow; a tubular inner tank in which the stack is housed; and a tubular outer tank that is mounted on the outside of the inner tank so as to define an inner space between the outer tank and an outer peripheral surface of the inner tank. Each of both end portions of the tubes has a thickness greater than each of middle portions of the tubes. The both end portions of the tubes adjacent to each other in the stack are joined together so as to form a clearance between the middle portions of the adjacent tubes in the stack. Outer peripheries of both end portions of the stack are joined to an inner peripheral surface of the inner tank. An introduction hole for introducing a cooling medium is formed in the outer tank.

Abstract: Provided is a plasma reactor capable of reliably generating plasma even in the event of inflow of water. The plasma reactor of the present invention includes a plasma panel stack 20, electrically conductive members 51 and 54, a case, and a mat 71. The plasma panel stack 20 has a structure in which electrode panels 30 are stacked, and generates plasma upon application of voltage between the adjacent electrode panels 30. The electrically conductive members 51 and 54 are electrically connected to discharge electrodes of the electrode panels 30. The case houses the plasma panel stack 20. The mat 71 intervenes between the case and the plasma panel stack 20 and fixes the plasma panel stack 20 to the case. The mat 71 is disposed apart from the electrically conductive members 51 and 54 so that gaps S1 and S2 are formed between the mat 71 and the electrically conductive members 51 and 54, respectively.

Abstract: A stack of separation disks, which includes a spindle and a rotor, and separates mist oil from processing-target gas by rotating the rotor and introducing oil for separation and the processing-target gas; the stack constituting the rotor, and the stack including: a first separation disk that is constituted by a plate member having a circular truncated cone shape, and has a rib formed on an inclined surface of the circular truncated cone shape, the rib extending in a first direction inclined toward one direction in a rotation direction with respect to a radial direction from a center of rotation; and a second separation disk that is constituted by a plate member having the circular truncated cone shape, and has a rib formed on an inclined surface of the circular truncated cone shape, the rib extending in a second direction inclined toward another direction opposite the one direction.

Abstract: An oil separator includes a cylindrical housing that accommodates a rotor and is provided with a gas discharge portion (first exhaust portion), the oil separator being configured to introduce target gas from a rotation center side of the rotor to condense oil mist and emit condensed oil from an outer peripheral edge of the rotor and further being configured to discharge from the housing through the gas discharge portion the blow-by gas (target gas) after having the oil mist separated. The oil separator includes a dome portion (sectioning member) that covers from an outside of the housing the gas discharge portion and sections a closed space around the gas discharge portion and an outlet pipe (second exhaust portion) that is provided to the dome portion and that discharges the blow-by gas from the closed space that is sectioned by the dome portion.

Abstract: An oil separator includes: a rotor having an inner peripheral space and configured to be rotated by introducing, into the inner peripheral space, oil for separation and processing-target gas containing mist oil so that the mist oil is separated from the processing-target gas; and a case having an internal space and an inlet hole communicating with the internal space, the internal space housing a separation chamber having the rotor, the case including a plurality of convex portions on an inner wall surface which constitutes the internal space, the plurality of convex portions arranged adjacently in a direction along the inner wall surface, and extending in an up-down direction.

Abstract: A rotor separates oil mist from a target gas. This rotor includes a separation disk group having separation disks including a plurality of truncated cone shape plate members layered. The separation disk group includes a first space (hollow part with attachment opening) and a second space (gaps between separation disks), the first space formed on a rotation center side of the rotor and the second space formed between separation disks that are laid over and in communication with the first space. The first space contains an oil introducing portion (gap between the upper end of the spindle and the upper side sealing member). Target gas is introduced into the first space, target gas and oil introduced from the oil introducing portion are made to flow from the first space to the second space to be discharged outward from an outer peripheral edge of the separation disk group, while rotating the rotor.

Abstract: A lower partition wall having a through hole vertically penetrates the lower partition wall center. A spindle is inserted into the through hole. The top surface side of the lower partition wall includes a convex portion, a groove, and a drain hole. The convex portion is concentrically disposed at the through hole periphery. The groove extends, from an outer peripheral side of the convex portion, toward the through hole on an inner peripheral side. The drain hole is outside the convex portion, vertically penetrating the lower partition wall. The separated oil circles a top surface of the lower partition wall. The oil flowing to an inner peripheral side of the lower partition wall is guided to the groove and flows into the through hole. The oil flowing to an outer peripheral side of the lower partition wall flows into the drain hole.