Environmental Protection Zone Quiz with Prizes, Issue 9 (9.19-9.22)

There are rotary mechanical screen cleaners, stepped mechanical screens, tooth-consuming mechanical screens, screen cleaners, and screen crushers. Function: Used to remove large floating debris from wastewater.

1. The cross-sectional shape of the grid bars can be circular, rectangular, or square. 2. Grills are used to remove larger suspended particles that could clog water pump units and pipeline valves, thereby ensuring the proper operation of subsequent treatment facilities.

1. The types of grids include manual removal and mechanical removal. 2. The function of the grid is to remove larger suspended particles that could clog the water pump units and pipeline valves, thereby ensuring the proper operation of subsequent treatment facilities.

Types of grids: ① Mobile grid sludge removers, generally used for coarse grid slag removal, and in some cases for relatively coarse medium grids. ②The pin-rack type grid sludge remover is mainly used for removing sludge from medium and fine grids. ③For high-chain automatic grid sludge removers, care should be taken during design to ensure that the liquid level is not too deep. ④Arcuate grid sludge removers are used for fine grids or relatively fine medium grids, and are commonly employed in small and medium-sized sewage treatment plants; they are generally installed in the channels before and after the metering tank. ⑤Steel cable grid sludge remover, mainly used for medium grids and fine grids. ⑥The back-rake type grid sludge remover is commonly used for medium and fine grids in small sewage treatment plants. ⑦Step-type grid sedimentators are not suitable for treating wastewater with high sand content; they belong to the category of fine grids or ultra-fine grids. ⑧The rake-tooth chain rotary grid sludge remover boasts advantages such as a simple structure, strong sludge removal capacity, low cost, and low noise levels. The main function of the grid is solid-liquid separation, and its specifications are adjusted according to the size of the solid particles.

Reply 1# huankeliukai 1 Manually cleaned grilles； Mechanical grille ； 2. Intercept large suspended particles and impurities in wastewater

1. There are many types and classification methods for grills, which can generally be divided into two major categories: grill machines and screens (strips). Grid machines are suitable for wastewater with high suspended solids concentrations, while screens are suitable for wastewater with low suspended solids concentrations. Common types of grid machines include: arm-type grid machines, chain-type grid machines, steel rope-type grid machines, rotary grid machines, etc. 2. In drainage systems, grids are used to remove larger suspended particles that could clog water pump units and pipeline valves, thereby ensuring the proper operation of subsequent treatment facilities. They consist of one or more sets of parallel metal bars and frames, and are installed at an angle in the inlet channels or at the entrance to the collection wells of water pumping stations, in order to trap larger suspended particles and impurities in the wastewater.

1. There are many types and classification methods for grills, which can generally be divided into two major categories: grill machines and screens (strips). Grid machines are suitable for wastewater with high suspended solids concentrations, while screens are suitable for wastewater with low suspended solids concentrations. Common types of screen machines include: arm-type screen machines, chain-type screen machines, steel cable-type screen machines, rotary screen machines, etc. 2. Function of screens: They are primarily used to remove large floating particles from wastewater, while fine screens are used to remove small floating particles. Removing these floating particles is necessary to prevent them from reaching subsequent treatment equipment and affecting the efficiency of the treatment process. Furthermore, floating debris not only poses a threat to aeration equipment but also easily causes sensors to fail. And it affects processing.

There are many types and classification methods for grills, which can generally be divided into two main categories: grill machines and screens (bars). Common types of grid machines include: arm-type grid machines, chain-type grid machines, steel rope-type grid machines, rotary grid machines, etc. The grid is used to remove larger suspended particles that could clog the water pump units and pipeline valves, ensuring the proper operation of subsequent treatment facilities.

Reply 1# huankeliukai 1: Depending on the spacing between the grid bars, grids are classified into three types: coarse grids, medium grids, and fine grids. According to the slag removal method for grids, there are two types: manual grids and mechanical grids. Mechanical grates are further divided into rotary mechanical grate cleaners, stepped mechanical grates, tooth-consuming mechanical grates, grate cleaners, and grate crushers. 2 A pretreatment device for trapping large contaminants in wastewater. 　　It is a metal frame made up of a set of parallel metal bars, placed at an angle over the channels through which wastewater flows, or at the inlet of pump station reservoirs, to trap large solid pollutants that are in a suspended or floating state, thereby preventing blockages in the pumps and the sludge discharge pipes of sedimentation tanks. 　　A grid consists of one (or multiple) sets of parallel metal bars arranged within a frame, and it is installed at an inclined angle in the inlet channel for water flow, or at the entrance of the collection well in a water intake pump station. Its purpose is to trap larger suspended particles and impurities in the wastewater, thereby ensuring the proper operation of subsequent treatment facilities or equipment. Mechanical grids represent the primary equipment used for pre-treatment, which is the first step in wastewater treatment in sewage treatment plants; they play a crucial role in the subsequent treatment processes. Their importance in water treatment facilities used in water supply and drainage projects is increasingly recognized. Practice has shown that whether the grid chosen is appropriate directly affects the operation of the entire water treatment system. Manual grids are generally used in small sewage treatment plants; they have a simple structure but require a high level of labor effort. Mechanical grids are generally used in large and medium-sized sewage treatment plants; these grids have a more complex structure and a higher degree of automation.

1. Based on the spacing between the grid bars, grids are divided into three categories: coarse grids, medium grids, and fine grids. According to the methods of slag removal using grids, there are three types: manual grids, mechanical grids, and hydraulic removal grids. Based on the differences in their grid structure, they can be classified into various types such as grab-rake type, circular type, arc type, rotary type, drum type, rotating type, toothed-rake type, and stepped type. 2. Grid equipment is generally used in the inlet channels for sewage treatment or at the entrances of collection tanks in lift pump stations. Its main function is to remove larger suspended or floating particles from the sewage, thereby reducing the load on subsequent water treatment processes, and it also serves to protect pumps, pipes, instruments, etc. When the amount of slag intercepted is greater than 0.2 m3/d, mechanical slag removal is generally used ； When the amount of slag at the grid is less than 0.2 m3/d, manual slag removal or mechanical slag removal can be employed.