Abstract: The present invention provides a multi plate screw press sludge dewatering machine and a helical shaft thereof. The multi plate screw press sludge dewatering machine includes fixed rings, movable rings, the helical shaft, a sludge inlet tank and a sludge discharging tank; the helical shaft adopts a variable diameter variable pitch helical shaft, a lead angle arrangement sequence of a helical blade of the whole helical shaft is gradual reduction from the sludge discharging tank to the sludge inlet tank, and the lead angle arrangement sequence is gradually reduced from 16°-22° to 6°-14°; a pitch of the helical shaft is gradually increased along a direction from the sludge inlet tank to the sludge discharging tank; a diameter of a shaft body of the helical shaft is gradually increased along with a direction of the sludge discharging tank from a ? position of a shaft length; and blockage prevention plates are arranged on two sides of the bottom of the helical blade.

Abstract: The present invention provides a multi plate screw press sludge dewatering machine and a helical shaft thereof. The multi plate screw press sludge dewatering machine includes fixed rings, movable rings, the helical shaft, a sludge inlet tank and a sludge discharging tank; the helical shaft adopts a variable diameter variable pitch helical shaft, a lead angle arrangement sequence of a helical blade of the whole helical shaft is gradual reduction from the sludge discharging tank to the sludge inlet tank, and the lead angle arrangement sequence is gradually reduced from 16°-22° to 6°-14°; a pitch of the helical shaft is gradually increased along a direction from the sludge inlet tank to the sludge discharging tank; a diameter of a shaft body of the helical shaft is gradually increased along with a direction of the sludge discharging tank from a ? position of a shaft length; and blockage prevention plates are arranged on two sides of the bottom of the helical blade.

Abstract: The present invention provides a multi plate screw press sludge dewatering machine and a helical shaft thereof. The multi plate screw press sludge dewatering machine includes fixed rings, movable rings, the helical shaft, a sludge inlet tank and a sludge discharging tank; the helical shaft adopts a variable diameter variable pitch helical shaft, a lead angle arrangement sequence of a helical blade of the whole helical shaft is gradual reduction from the sludge discharging tank to the sludge inlet tank, and the lead angle arrangement sequence is gradually reduced from 16°-22° to 6°-14°; a pitch of the helical shaft is gradually increased along a direction from the sludge inlet tank to the sludge discharging tank; a diameter of a shaft body of the helical shaft is gradually increased along with a direction of the sludge discharging tank from a ? position of a shaft length; and blockage prevention plates are arranged on two sides of the bottom of the helical blade.

Abstract: Disclosed are a full-spectrum light emitting diode (LED) and applications thereof. A fluorescent powder composition is mixed with silica gel. In the mixture of the fluorescent powder composition and the silica gel, the mixture of the fluorescent powder composition and the silica gel is applied on blue LED chips. The blue LED chips are blue light emitting diode chips, and at least two blue LED chips are provided. The fluorescent powder composition includes fluorescent powder of at least two different colors. An excited spectrum is close to a plant photosynthesis curve, a meat irradiation curve, a biological growth curve, a seafood irradiation curve, a vegetable and fruit irradiation curve, and a pastry irradiation curve. A full-spectrum LED light source can be adjusted to simulate natural light irradiation. The excited spectrum is close to the plant photosynthesis curve, thereby causing photosynthesis in plants, achieving an optimal plant growth effect.

Abstract: The present invention provides a multi plate screw press sludge dewatering machine and a helical shaft thereof. The multi plate screw press sludge dewatering machine includes fixed rings, movable rings, the helical shaft, a sludge inlet tank and a sludge discharging tank; the helical shaft adopts a variable diameter variable pitch helical shaft, a lead angle arrangement sequence of a helical blade of the whole helical shaft is gradual reduction from the sludge discharging tank to the sludge inlet tank, and the lead angle arrangement sequence is gradually reduced from 16°-22° to 6°-14°; a pitch of the helical shaft is gradually increased along a direction from the sludge inlet tank to the sludge discharging tank; a diameter of a shaft body of the helical shaft is gradually increased along with a direction of the sludge discharging tank from a ? position of a shaft length; and blockage prevention plates are arranged on two sides of the bottom of the helical blade.

Abstract: A composite one-piece IGBT power device is disclosed to solve a problem that existing devices' turning-on/off speed is not high enough. The composite one-piece IGBT device of the present invention comprises at least two IGBT devices. Drift regions of the at least two IGBT devices connect with each other and electrodes of the at least two IGBT devices are led out separately from each other. The composite one-piece IGBT device may also consist of four IGBT devices. The drift regions of the four IGBT devices connect with each other. The composite IGBT device may also be embodied as two IGBT devices connected with each other. One of the two IGBT devices acts as a primary switching device for switching a large current, and the other acts as an auxiliary device for accelerating the switching action of the primary switching device. The composite IGBT device of the present invention is formed through a producing method which adds a few steps such as forming grooves to the conventional IGBT manufacturing process.