What should be noted in the operation of a zero discharge system for desulfurization wastewater? Let's take a look together. The application of zero discharge technology in desulfurization wastewater treatment not only achieves zero discharge of wastewater in a meaningful sense, but also realizes circular economy, which has important promotion significance. Do you know what to pay attention to during the operation of a zero discharge system for desulfurization wastewater?
(1) Equipment maintenance before operation. For wastewater treatment equipment, regular inspections should be carried out to prepare for operation and maintenance. Regularly organize the dosing system and check the dosage inside the medicine box. Regularly maintain the pipeline of the metering pump to ensure accuracy. Regularly inspect the pH measurement electrode, clean and adjust it in a timely manner.
(2) Equipment maintenance during operation. During operation, it is necessary to check the protective device in front of the pump in real time to prevent excessive residue on the grille and prevent smooth water flow. Due to the high content of suspended solids in desulfurization wastewater, the system needs to be cleaned promptly after each shutdown. There is a cleaning location. From the outlet of the waste pump to the pH adjustment tank, the lime milk dosing system pipeline, the coagulation tank to the purification machine pipeline, and the purification machine mud conveying pipeline. In addition, if the pH adjustment tank, reaction tank, and flocculation tank are separate boxes, it is necessary to enlarge the continuous pipeline between the boxes and install a water level gauge on the box.
(3) The main control of desulfurization wastewater treatment system. Implement open-loop control based on wastewater flow rate and adjust the dosage of chemicals added in the reaction proportionally. The pH value and turbidity of water are adjusted through online monitoring to adjust the amount of HGI added, thereby achieving compliance with water. If the turbidity of the effluent is not up to standard, please send the water flowing out of the water tank back to the reprocessing tank for treatment, stop the inflow of wastewater, and clarify the automatic discharge of mud in the pond.
The zero emission integrated treatment process for desulfurization wastewater is a new zero emission treatment method developed based on the overall flue gas process plan of coal-fired boilers. The zero discharge integrated treatment process and equipment for desulfurization wastewater use a wastewater pretreatment device for preliminary solid-liquid separation of desulfurization wastewater. The waste water flows into the flue after the air ritual vessel and in front of the vacuum cleaner. After the dual fluid spray is magnetized on the plateau, under the heating of the high temperature flue gas waste heat, the water evaporates completely and evaporates into water vapor in the air. The salt is determined as solid particles according to the water evaporation, and is captured by the vacuum cleaner into dry materials to achieve "extinction". At the same time, the smoke humidity is improved, the efficiency of the dust collector is improved, and the process water consumption of the desulfurization absorption tower is reduced, Maximize water and energy conservation.
The zero discharge equipment for desulfurization wastewater is divided into two types according to the discharge standards: acquisition and zero discharge. The wastewater treatment process is divided into the general treatment process for desulfurization wastewater and the zero discharge treatment process for desulfurization wastewater.
Zero discharge equipment for desulfurization wastewater: The conventional treated water is mixed with EDR concentration, fresh water separation, fresh water flow into the regulating area and circulation system drainage, domestic water, pre-treatment of industrial wastewater, initial rainwater, etc. It is used for AO biochemical biological denitrification, water reuse process of biological treatment water "UF RO", RO fresh water is used for boiler feed water treatment system inlet section, RO concentrated water flows back to the EDR inlet end, and EDR concentrated water enters the evaporative salt precipitation equipment.
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