Abstract: An exhaust gas treatment apparatus includes: a first reduction catalyst, disposed in a flow path of combustion exhaust gas of a fuel; a reductant supply part, disposed upstream of the first reduction catalyst; a reductant decreasing catalyst, disposed downstream of the first reduction catalyst; at least one second reduction catalyst, disposed downstream of the reductant decreasing catalyst; a first concentration measuring part measuring a first concentration which is a concentration of the specific substance in the combustion exhaust gas at a position downstream of the first reduction catalyst and upstream of the reductant decreasing catalyst; a second concentration measuring part for measuring a second concentration which is a concentration of the specific substance in the combustion exhaust gas at a position downstream of the reductant decreasing catalyst; and a decision part configured to decide whether to increase or decrease a supply amount of the reductant from the reductant supply part.

Abstract: An exhaust gas treatment apparatus includes: a second reductant supply part, disposed in a flow path of combustion exhaust gas of a fuel containing a first reductant that is capable of reducing a specific substance, for supplying a second reductant for reducing the specific substance in the combustion exhaust gas to the combustion exhaust gas; and a first reductant decreasing part, disposed upstream of the second reductant supply part in the flow path, for decreasing the first reductant in the combustion exhaust gas.

Abstract: A NOx removal device includes: an ammonia injection part configured to inject ammonia to the flue gas flowing through a duct; a mixer configured to mix the flue gas and ammonia; and a NOx removal catalyst configured to provide a resistance against a flow of a mixture fluid in which the flue gas and the reducing agent are mixed. The ammonia injection part has an ammonia pipe and injecting nozzles provided in the ammonia pipe and configured to inject ammonia into the duct. The distance A from the ammonia injection part to the mixer is 10 times or greater and 30 times or less the outer diameter d of the ammonia pipe. The distance B from the mixer to the NOx removal catalyst is longer than the distance A from the ammonia injection part to the mixer.

Abstract: An electrolytic device includes: an electrolytic tank; an ion exchange membrane configured to partition the electrolytic tank into a cathode chamber and an anode chamber; a catholyte supply unit configured to supply an electrolytic solution serving as a catholyte to the cathode chamber; a catholyte discharge unit configured to discharge the catholyte from the cathode chamber; an anolyte supply unit configured to supply an electrolytic solution serving as an anolyte to the anode chamber; an anolyte discharge unit configured to discharge the anolyte from the anode chamber; a cathode; an anode; a cathode side power feeder provided in the cathode chamber and configured to supply electric power to the cathode; and an anode side power feeder provided in the anode chamber and configured to supply electric power to the anode. A pH of the catholyte is lower than a pH of the anolyte.

Abstract: The present disclosure comprises: a mixing duct equipped with an inlet through which combustion gas flows in and an outlet through which the combustion gas flowing in from the inlet flows out; a cooling duct that allows cooling gas, which has a lower temperature than the combustion gas, to flow out into the mixing duct, and generates a mixed gas consisting of the combustion gas and the cooling gas; and an expansion duct equipped with an inlet that is connected to the mixing duct and through which the mixed gas flows in and an outlet through which the mixed gas flowing in from the inlet flows out. The mixing duct has a shape with an equal cross-sectional area at each position from the inlet to the outlet. The expansion duct provides a denitrification device having a shape, the cross-sectional area of which gradually expands from the inlet to the outlet.

Abstract: It is an object to provide a regenerated denitration catalyst whose denitration performance is restored compared with a denitration catalyst before use, utilizing a spent denitration catalyst, and a method for manufacturing the same. In a regenerated denitration catalyst according to the present disclosure, a spent denitration catalyst including a first titanium oxide as a main component, and a second titanium oxide are mixed. The spent denitration catalyst is already used in a denitration reaction in which nitrogen oxides in a gas are decomposed into nitrogen and water using a reducing agent. The second titanium oxide has a larger specific surface area per unit weight than the first titanium oxide. A content of the second titanium oxide based on a total weight of the first titanium oxide and the second titanium oxide is preferably 10% by weight or more and 90% by weight or less.

Abstract: This boiler has a flue in which a reducing agent supplying device and a selective reduction catalyst are provided, a bypass flow path bypassing economizers is provided, and a first closing device partially closing the bypass flow path and a second closing device partially closing the flue are also provided. A plurality of first closing members, serving as the first closing device, are provided along the direction in which exhaust gas flows through the flue at a predetermined spacing in the width direction of the flue. A plurality of second closing members, serving as the second closing device are provided along the vertical direction at a predetermined spacing in the width direction of the flue. The first closing members and the second closing members are arranged so as to be displaced from each other in the width direction of the flue.

Abstract: In an exhaust duct and a boiler, there are provided: a flue gas duct through which flue gases pass; a first hopper provided to the flue gas duct, the first hopper collecting PA in the flue gases; a low-repulsion section provided to the upstream side or the downstream side of the first hopper in the direction of flow of the flue gases, the low-repulsion section having a lower coefficient of repulsion than the inner wall surface of the flue gas duct; and a popcorn-ash-trapping section for trapping PA in the flue gases, the popcorn-ash-trapping section provided to the downstream side of the first hopper and the low-repulsion section in the direction of flow of the flue gases, whereby it is possible for solid particles in the flue gases to be properly trapped.

Abstract: This boiler has a flue in which a reducing agent supplying device and a selective reduction catalyst are provided, a bypass flow path bypassing economizers is provided, and a first closing device partially closing the bypass flow path and a second closing device partially closing the flue are also provided. A plurality of first closing members, serving as the first closing device, are provided along the direction in which exhaust gas flows through the flue at a predetermined spacing in the width direction of the flue. A plurality of second closing members, serving as the second closing device are provided along the vertical direction at a predetermined spacing in the width direction of the flue. The first closing members and the second closing members are arranged so as to be displaced from each other in the width direction of the flue.

Abstract: In an exhaust duct and a boiler, there are provided: a flue gas duct through which flue gases pass; a first hopper provided to the flue gas duct, the first hopper collecting PA in the flue gases; a low-repulsion section provided to the upstream side or the downstream side of the first hopper in the direction of flow of the flue gases, the low-repulsion section having a lower coefficient of repulsion than the inner wall surface of the flue gas duct; and a popcorn-ash-trapping section for trapping PA in the flue gases, the popcorn-ash-trapping section provided to the downstream side of the first hopper and the low-repulsion section in the direction of flow of the flue gases, whereby it is possible for solid particles in the flue gases to be properly trapped.

Abstract: A navigation apparatus, which can reduce time to restore a display condition as much as possible, even when it becomes necessary to restart during executing software, by omitting several initializing processes when the apparatus restarts. In a navigation apparatus, at a time of startup, a display controller is initialized and an initial picture is displayed, so that other initializing process is performed. After that, a present position is displayed and normal navigation process is performed. When a control is complicated as a result of executing plural programs at same time, improper exception occurs and then restarts. In this time, as a pre-process, a map display picture of the present position is stored in an external memory. At a restart process, the display controller firstly displays the map display regarding the present position, and the restart process is performed under this condition so as to restore a normal condition.