Automatic reagent feeding device of combined type automatic reagent feeding sledge for pretreating raw water of power plant

Abstract

The invention relates to an automatic reagent feeding device of a combined type automatic reagent feeding sledge for pretreating raw water of a power plant. The automatic reagent feeding device comprises a vacuum suction pump (1), a hose (2), a suction head (3), a hopper (4), a hopper pneumatic valve (5), a pre-wetting device (6), a reagent atomizing mixed ejector (7), a dry powder pushing double-screw conveyor (8), an electrical control system (9) and a water supply system (10). The automatic reagent feeding device disclosed by the invention has the beneficial effects of effectively preventing the powder from being wet and caked by sucking a material by adopting the vacuum suction pump, and being free of pulsation and high in blending accuracy by pushing the material by adopting a screw rod.

Description

technical field [0001] The invention relates to an automatic dosing device of a combined automatic dosing skid for pretreatment of raw water in a power plant, and belongs to the technical field of complete sets of power plant equipment. Background technique [0002] At present, in the pretreatment of raw water in domestic power plants, there are two main defects in the automatic control of dosing: 1. The flow signal fluctuates frequently and the SCD signal is unstable, which makes the system difficult to stabilize. ;2. Under different water quality conditions, the SCD response curve of dosing will change significantly, resulting in inappropriate adjustment parameters. If it is not corrected, the SCD value will change in a wide range, the dosing amount will be inappropriate, and the system will be difficult to operate stably. , so that it cannot work normally, so the combined dosing skid for the pretreatment of raw water in the power plant has no automatic dosing or it is di...

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Problems solved by technology

[0002] At present, in the raw water pretreatment of domestic power plants, there are two main defects in the automatic control of dosing: 1. The flow signal fluctuates frequently and the SCD signal is unstable. These all make the system difficult to stabilize, the operating mechanism is constantly adjusted, and it cannot be put into automatic operation; 2. Under different water quality conditions, the SCD response curve of dosing has a major change, resulting in inappropriate adjustment parameters. If it is not corrected, the SCD value will be in the large The range changes, the dosing amount is not suitable, the system is difficult to run stably, and thus cannot work normally, so the combined dosing skid for the pretreatment of raw water in the power plant has no automatic dosing or it is difficult to realize the automatic dosing function

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