Automatic dosage device for wet flue gas desulfurization waste water drug and automatic dosage method

Abstract

The invention relates to the field of environmental protection desulfurization, and provides an automatic dosage device for wet flue gas desulfurization waste water drug and an automatic dosage method. The automatic dosage device comprises a powder drug bin or a solvent drug tank and a reaction device, and is characterized in that drug proportioning metering tanks are arranged between the powder drug bin or the solvent drug tank and the reaction device; and weighting modules are arranged below the drug proportioning metering tanks, and are connected with a control system. The weighting modules are adopted in the operation process, the measuring precision of the system is very high, the measuring accuracy rate is increased, data is measured without contact between a meter and waste water, and corrosion and damages to the instrumentations are greatly reduced.

Description

technical field [0001] The invention relates to the field of environmental protection desulfurization, in particular to an automatic dispensing device and method for wet flue gas desulfurization waste water medicine. Background technique [0002] The limestone-gypsum wet desulfurization process is the most widely used desulfurization technology in the world. The main advantages of the limestone / gypsum method are: a wide range of applicable coal types, high desulfurization efficiency, high absorbent utilization rate, and equipment operation rate High reliability, high reliability, rich and cheap source of desulfurizer - limestone. However, the disadvantages of the limestone / gypsum method are also obvious. The desulfurization wastewater seriously exceeds the national discharge standard. The desulfurization wastewater includes suspended solids, heavy metal ions, F ions, CL ions and COD. Most impurities can be removed through chemical and precipitation reactions. Make the disch...

AI Technical Summary

Problems solved by technology

However, the disadvantages of the limestone / gypsum method are also obvious. The desulfurization wastewater seriously exceeds the national discharge standard. The desulfurization wastewater includes suspended solids, heavy metal ions, F ions, CL ions and COD. Most impurities can be removed through chemical and precipitation reactions. Make the discharged wastewater meet the discharge standards stipulated by the state

An important part of the wastewater treatment system is the control of the dosage of wastewater drugs. In the traditional wet flue gas desulfurization system, the original drug dosing device of the wastewater treatment system is manually added to the water ratio, which not only consumes a lot of drugs in the drug dosing system , and the concentration of the prepared liquid medicine is unstable, resulting in the waste of medicine and the increase in the load of the clarification concentrator and the sludge filter press. The overload operation of the sludge filter press leads to frequent equipment failures and the availability of the wastewater treatment system. reduce

At the same time, some of the treated wastewater cannot meet the national discharge standards, which not only increases the workload of maintenance, but also increases the output of waste such as sludge, and consumes a lot of energy.

Images