A pressure vessel includes a pump having a passage that extends between an inlet and an outlet. A duct at the pump outlet includes at least on dimension that is adjustable to facilitate forming a dynamic seal that limits backflow of gas through the passage.

The present invention relates to a cooling device for preventing fire due to spontaneous combustion of coal stockpiles in a coal-fired power plant, and more specifically, to a cooling device for preventing spontaneous combustion of coal stockpiles, for which a plurality of cooling devices are provided at a predetermined interval in coal stockpiles and, when a temperature (ignition temperature) specified by a user is detected from the outer surface, compressed liquefied nitrogen stored in the cooling device is ejected to lower a temperature around the loaded coal, thereby preventing spontaneous combustion by the oxidation of coal.

The present invention relates to a cooling device for preventing fire due to spontaneous combustion of coal stockpiles in a coal-fired power plant, and more specifically, to a cooling device for preventing spontaneous combustion of coal stockpiles, for which a plurality of cooling devices are provided at a predetermined interval in coal stockpiles and, when a temperature (ignition temperature) specified by a user is detected from the outer surface, compressed liquefied nitrogen stored in the cooling device is ejected to lower a temperature around the loaded coal, thereby preventing spontaneous combustion by the oxidation of coal.

A calcination unit able to decarbonate raw materials intended for clinker production, the unit including: a main duct in which the raw materials circulate according to a first movement direction, the raw materials being calcined in the main duct; a solid fuel supply duct opening onto the main duct via a fuel outlet, the solid fuel moving according to a second movement direction; a retaining device located in the main duct and arranged opposite the solid fuel outlet so that the solid fuel arriving in the main duct via the fuel outlet passes through the retaining device.

A calcination unit able to decarbonate raw materials intended for clinker production, the unit including: a main duct in which the raw materials circulate according to a first movement direction, the raw materials being calcined in the main duct; a solid fuel supply duct opening onto the main duct via a fuel outlet, the solid fuel moving according to a second movement direction; a retaining device located in the main duct and arranged opposite the solid fuel outlet so that the solid fuel arriving in the main duct via the fuel outlet passes through the retaining device.

An online pulverized coal concentration regulator is mounted at a front end of a pulverized coal pipe, and a pulverized coal concentration detector is arranged in the pipe. The regulator includes a control system, and an output of the concentration detector is connected with a signal input end of the control system. The regulator includes a top plate, a regulating rod, and a powder baffle plate. A mounting hole for fixedly mounting the front end of the pipe and a through hole for the powder baffle plate to penetrate through are arranged in the top plate, and a connector is arranged between the regulating rod and the powder baffle plate. The regulator includes a guider slidably connected with the powder baffle plate and fixedly connected with the top plate, and a diversion plate arranged on the top plate and slidably connected with the powder baffle plate.

A device and method for loading pellets. A funnel includes a means for loading pellets into a reactor tube, and a means for quickly and easily measuring the elevation of pellets in the reactor tube while the reactor tube is being loaded. A vacuum-assist device may be used to pick up and transfer a desired volume of porous pellets while removing dust from the porous pellets.

A solid fuel boiler with one or more fuel chutes configured to pre-dry wet solid fuel prior to loading into a combustion chamber of the boiler, enabling higher thermal efficiencies and burning less fuel to produce the same steam quantity. The pre-drying fuel chutes pass through the boiler where hot combustion gases radiantly and convectivelyheat the chute walls to dry the wet solid fuel by radiant, convective, and/or conductive heating. Agitator mechanisms or structures within the chute mix the fuel for uniform heating, break up clumps of wet fuel, regulate the speed of falling fuel, prevent sticking, dry the fuel by means of steam and/or hot air, transport and deliver a cooling medium while a chute is offline in an operating boiler, and suppress fire using steam injection. Fuel from the chute can flow into a fuel storage bin or directly into the combustion zone of the furnace.

A solid fuel boiler with one or more fuel chutes configured to pre-dry wet solid fuel prior to loading into a combustion chamber of the boiler, enabling higher thermal efficiencies and burning less fuel to produce the same steam quantity. The pre-drying fuel chutes pass through the boiler where hot combustion gases radiantly and convectivelyheat the chute walls to dry the wet solid fuel by radiant, convective, and/or conductive heating. Agitator mechanisms or structures within the chute mix the fuel for uniform heating, break up clumps of wet fuel, regulate the speed of falling fuel, prevent sticking, dry the fuel by means of steam and/or hot air, transport and deliver a cooling medium while a chute is offline in an operating boiler, and suppress fire using steam injection. Fuel from the chute can flow into a fuel storage bin or directly into the combustion zone of the furnace.

The present invention relates to a cooling device for preventing fire due to spontaneous combustion of coal stockpiles in a coal-fired power plant, and more specifically, to a cooling device for preventing spontaneous combustion of coal stockpiles, for which a plurality of cooling devices are provided at a predetermined interval in coal stockpiles and, when a temperature (ignition temperature) specified by a user is detected from the outer surface, compressed liquefied nitrogen stored in the cooling device is ejected to lower a temperature around the loaded coal, thereby preventing spontaneous combustion by the oxidation of coal.