On 5 november, at 8 a. M., the entire area of the water supply area of our city's water supply company was shut down. The water supply was restored by 5 p. M. On that date, the municipal water company's southern suburbs completed the year's equipment overhaul。
In the case of water outages, more attention may be given to pre-cut water storage or when water supplies will be restored. But very few understand what the inspectors have done in the nine hours of the water stoppage. Why is there a routine water stoppage every year? Which projects? How is water quality safe? Next, the reporter led you to the scene of the southern suburban water survey to find out the answers to these questions。
Why do you need a water stop
Long periods of high loads and safety risks to water purification equipment
Urban water supply is an important pillar of civic life and industrial production. The southern peri-urban water plant, which is responsible for water supply in the centre of the city, was established in 1995 and covers a high-speed water supply from west to east, to port of guangley, to the north, to the galactic region of lake king, and to the south, to the rural areas, with an area of over 220 square kilometres and a population of about 300,000 people。
As with equipment and human bodies, regular maintenance and maintenance are required, and after a long period of high-load operation, the screening of hazards associated with the safety of electrical and mechanical equipment is particularly important. As with the annual medical examination, the municipal water company conducts annual major inspections。
According to staff members, the duration of the exercise is usually selected before the heating season. When heating starts, boilers in heating units are vulnerable to safety incidents due to lack of water if equipment becomes problematic. As a result, the annual time for overhauls is usually at the end of october or early november, and is determined jointly according to weather conditions, the power supply sector and construction unit time。
What are the rehabilitation projects
Maintenance, detection, replacement of equipment to ensure safe production
Replacement of the butterfly valve by maintenance workers。
To ensure water safety, annual overhauls include routine equipment maintenance, performance testing and replacement of aged equipment. According to the interviews, the mission consisted mainly of maintenance of equipment for distribution facilities at water plants, replacement of old valves, re-engineering of water pipelines, installation of water meters in the plant areas and general drainage and overhaul of water lines in urban areas to ensure the safety of heating, living and industrial water。
In addition to carrying out these routine annual inspections, the annual “medical examination” will add new items depending on the operation of the year.” in addition to our regular tasks, we will take advantage of the annual inspection season to meet the other needs of our citizens. For example, during the previous years' inspections, which focused on hot spots and difficulties of concern to the public, such as water quality and water pressure, the water plant introduced new water purification and disinfectant site retrofitting projects, and filtration of the carbon-filtration pond process。
How can water outages be minimized
It's time to race. Over 90 people are busy
On the spot, the two words that journalists heard most from the staff members were “quick” and “grow”. Indeed, it's a time race。
In order to minimize the impact on citizens and businesses, municipal water companies have put pressure on themselves to reduce the time spent on inspections. The southern peri-urban water plant's legend tells reporters: “we're docking with the construction units involved in electricity, machinery, etc., before the water stop. The staff will inspect in advance the generators, valves and other equipment used to ensure that nothing is lost.”
Urban water network maintenance。
In the course of the overhaul, nine inspection teams and more than 90 technicians were fully engaged. At the site of the replacement valve, skilled workers pump screws in wells, unload valves and perform continuous operations. In order to be in a hurry, lunch can only be taken in haste. At the high-pressure distribution cabinets in the secondary pump room, staff members are working on maintenance work such as wire security checks for electrical equipment, tight bolts, and defiling of transformers. Near the junction between east three and the river liao, the construction team has dug out the pipes buried in the ground and is in the process of installing valves ..
How can water quality be ensured
Water quality tests are closed from the source to the tap
How can the quality of water be secured after the repairs? Under the leadership of cai, journalists followed the factory's original water: water from the water intake went through the pump house to the flat-reactive sedimentation ponds, filters, carbon filtration ponds, membranes, cleaning ponds, at the secondary pump room, and the crystal-cracked tap water was flowing and the water was clean。
Level-ii pump room overhaul and distribution cabinets, cleaning pumps。
In a workshop in the secondary pump room, the wall was filled with various instruments and the data on the dashboard were beating in real time. A presentation was made to the press by staff: “this is an out-of-plant residual chlorine dioxide detector, and this is an out-of-plant water hysteria... Each instrument monitors an indicator in real time.”
The 24-hour water quality assurance system for laboratory testing, online monitoring, mobile testing, and the monitoring and management of the three levels of water quality are very secure. The southern suburban water plant implements a three-tier monitoring system for water quality, i. E. Class testing (level i), laboratory testing at the water plant (level ii), central laboratory testing (level iii), a 24-hour monitoring of each process from the water intake from the beginning to the end of the water process of the water plant to the end of the plant, each of the values, from the extraction of the water source to the tap, to achieve the level of water quality detection。
Water flows to the population according to 106 full tests of the living drinking water sanitation standard. The water quality testing centre of the municipal water company is described as a laboratory certified by the shandong provincial market supervision authority, with the qualification of the cma (certificate of measurement in china) for water quality testing and the capacity to detect 565 projects for 9 products such as drinking water, drinking water purification, surface water and groundwater. The water quality testing centre organizes regular monitoring and inspection of the water quality of the plants at daily, weekly, monthly and semi-annual intervals, achieving full coverage of 106 water quality monitoring projects at the plants. At the same time, the results of water quality tests are regularly publicized through web-based media such as the municipal water company's website, the micro-intelligence public number and social monitoring。
“the daily running water for citizens is subject to a rigorous process, processing hundreds of test and test indicators, ensuring 100 per cent conformity of the running water, and the drinking water for the citizens is fully reliable.” the director of the water quality testing centre, suk-hwa, said。
(reporter chan dan)
