Sediment oxygen demand determination device based on electromagnetic dynamic and using method

Abstract

The invention relates to a sediment oxygen demand (SOD) determination device based on electromagnetic dynamic, and a using method. The SOD determination device comprises a testing room, a dynamic room, a magnetic rotor, a magnetic pole, a motor, a dissolved oxygen probe socket, support fixing interfaces and a storage battery, wherein the testing room is in a cylinder structure with the bottom end opened and the runway-shaped cross section; the dissolved oxygen probe socket is formed on one side of the top of the testing room; the support fixing interfaces are arranged at the two ends of the top of the testing room respectively; the dynamic room is a cylindrical barrel and reversely fixed at the top of the testing room; the motor connected with the magnetic pole is arranged in the dynamic room, and is externally connected with the storage battery by a connecting line; the magnetic rotor is placed in the testing room, and is in magnetic connection with the magnetic pole; a hand-held support is connected and fixed to allow the device to be submerged in water and to be filled with overlying water; the dissolved oxygen probe is inserted and sealed; the device is then fixed at the bottom of the water; overlying water circulation of the testing room is adjusted and controlled; and an SOD is determined. The device is simple in structure, easy to dismount, small and exquisite in size, and convenient to carry, and can effectively determine the SOD under the action of different hydrodynamic forces.

Description

technical field [0001] The present invention relates to the field of environmental protection technology, in particular to a portable electromagnetic power sediment oxygen consumption rate (SOD) measuring device and its use method, especially capable of realizing the determination of sediment oxygen consumption rate under hydrodynamic conditions, so that under hydrodynamic conditions The determination of SOD is more convenient and accurate. Background technique [0002] The oxygen consumption of sediment is an important part of the oxygen consumption process of rivers, lakes and other water bodies. SOD (sediment oxygen demand), that is, the oxygen consumption rate of sediment, is usually used to characterize the oxygen consumption of sediment in water bodies. SOD mainly includes two parts, one is the oxidation process of reducing substances in the sediment and the chemical oxygen depletion (CSOD) produced by the diffusion of these reducing substances to the overlying water; ...

AI Technical Summary

Problems solved by technology

At present, water pumps and bearings are mainly used to circulate the water body with motors or waterproof motors to drive paddles to promote the uniform distribution of DO. However, the bearings are prone to jamming during the sediment suspension process, and the rust problem of the motor is also inevitable, and it is waterproof. The motor is generally expensive and there is also the problem of Kasha

Although some researchers also use two-way windmill paddles connected by bearings to be fixed in the device, and the flow velocity of the river itself drives the paddles to rotate, but this unpowered transmission method is difficult to use when the flow velocity is small, and the disadvantages of the bearings are still the same. exist

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