In modern society, the medical reform in hospitals has undergone tremendous changes in both functional characteristics and image styles. As patients'demands for the quality of medical services are getting higher and higher, hospitals have to innovate in building functions, equipment functions, service levels and so on. Water design has always been an important part of hospital building structure. It must have safety, availability, reliability and other performance. It must also have the advantages of energy saving and environmental protection. Therefore, it is of great significance to strengthen modern medical buildings for the research and discussion of water supply and drainage design.
With the development of social economy, hospitals have made great progress not only in medical technology, but also in some new equipment and buildings. At the same time, patients also put forward higher requirements for medical quality and hardware equipment, and hospitals need to meet the needs of patients in terms of construction. The design of water supply and drainage system is an important part of hospital building structure. It needs to have the characteristics of safety, sanitation and sustainability.
1. Requirements of Hospital for Water Supply and Drainage System Design
1.1 Water Requirements for Pharmaceutical Departments in Hospitals
Distilled water is needed in the preparation room of a hospital, so the requirement of water quantity and quality is higher. In the distilled water system, pressurization equipment is generally set up. Therefore, the water supply and drainage should meet the water demand of distilled water in the preparation room, and arrange the delivery pipe and cooling water system.
1.2 Requirements for water use in various departments of hospitals
Hospitals generally have operating rooms, outpatient rooms, wards and other surgical and internal medicine departments, with large water consumption, high time and quality requirements for water use, and also need two systems of cold and hot water. Therefore, in this part of the water supply system design, the requirements of safety, hygiene and efficiency should be fully realized. Firstly, water taps should be set up, which can be distinguished from traditional manual ones by foot and elbow, so as to facilitate the needs of patients and reduce the spread of pathogens. In terms of switching, leak-proof products are needed to avoid the hidden dangers caused by the humidity of the external environment. In addition, the requirements for water temperature are also very high, especially in the operating room, delivery room and other departments. Some laboratories also have special needs, which should be analyzed in detail.
1.3 Drainage Requirements

Hospital exhaust gas drainage is large. In addition to general waste drainage, some drainage containing chemical substances account for the majority. Therefore, appropriate measures should be taken in the later treatment, such as classified discharge, disinfection treatment, strengthening inspection and supervision, and reducing hazards and pollution. Sodium hypochlorite, bleaching powder concentrate, chlorine dioxide, ozone and other materials can be used for the treatment of late wastewater.

2. Key Points of Water Supply and Drainage System Optimization in Modern Hospitals
2.1 Optimum Design of Water Quality in Hospital
The way of using water in maternity room, operation room, ophthalmology department and stomatology department in hospital must adopt the water after purification and disinfection. In the design of water supply and drainage, sterilization, disinfection, dust-free, heat insulation and purification drainage devices must be added, and special disinfection treatment of water source must be ensured before formal investment can be made. In addition, water supply pipes and disinfection equipment should be regularly maintained, inspected and repaired to ensure that the quality of water meets the use standards. Distilled water is used to test and prepare many professional medicines in many departments such as laboratory, preparation room and so on. Professional distilled water supply devices must be added, and local pressurization devices should be set up to drain pipes according to the working standards in hospital laboratories and the requirements of reserve water for preparations. Equipped with corresponding treatment, but also need to be equipped with standard water quality, water volume and water pressure monitoring system, to find problems in time and then solve problems, so as to cooperate with the cooling water circulation system, with the best quality to serve the work of the hospital.
Many departments in the hospital, such as delivery room, baby room, skin clinic, operation room, endoscope room and logistic studio, have special requirements for water quantity and temperature. They should conduct special investigation and induction on the rules of water use and the temperature of water use according to the working conditions of each department and department. Accurate establishment of hot water supply system, so that medical work has sufficient water resources, and to the greatest extent to implement the concept of energy saving and consumption reduction goals.
2.2 Optimum Design of Boiling Water Furnace and Water Supply Pipeline in Hospital
Because the flow of people inside the hospital is very large and the requirement of beautifying the environment is very high, we should try our best not to adopt the way of steam boiling furnace in the water supply and drainage system, in order to reduce the problems such as steam leakage or drainage of traps, and avoid the problems of wetness on the ground, mildew on the wall and workers in the hospital. Burns and burns caused by steam. Considering the demand of water supply and drainage in hospital and the working environment, we should use the automatic volume electric boiling water stove as far as possible, which not only facilitates management, but also meets the needs of medical staff and patients, and improves the environment in hospital wards to a certain extent.
As for the design of water supply and drainage pipelines in hospitals, they must have the characteristics of both functionality and aesthetics. Especially for outpatient departments and other departments, due to the influence of historical legacy and the demand for medical services, there are usually some problems similar to the confusion of wiring. Finally, the pipelines are exposed. It seriously affects the external aesthetics, but also increases the risk of pipeline operation. If the abnormal drainage pipeline leads to leakage, the safety of equipment, staff and patients can not be guaranteed. Therefore, it is necessary to improve this type of pipeline and improve it on the basis of ensuring its function. The purpose of reasonable layout is to prevent the occurrence of pipeline disorder and other phenomena. At the same time, it is necessary to optimize the drainage pipelines of some high-rise buildings. Avoid the risk of water supply and drainage pipeline operation as far as possible.
2.3 Optimum Design of Drainage Pipeline
In the process of hospital work, some sewage and water supply and drainage pipes used in wastewater should be optimized and treated. For example, patients'blood, excreta, waste from inspection, pathological slices and some radioactive substances, as well as wastewater contaminated by chemical products, should set up special drainage and collection pipelines for them, and then collect them uniformly, disinfect them harmlessly, and burn them by special manufacturers after sterilization. Burning and discharge. For the heavy metal wastewater and sewage produced in the oral clinic and laboratory, it must be precipitated by chemical method or treated by ion exchange before it can be discharged.
In hospitals, wastewater containing radioactive elements and sewage produced in the process of using isotopes for treatment must be stored for a long time to meet the requirement of element decay, and then special treatment should be completed in the decay tank to ensure that it meets the national discharge standards before it can be discharged specially. If the sewage discharged is not sampled regularly, only in this way can problems be found and solved in time.
Whether it is for environmental protection or safety, the treatment of sewage and wastewater in hospitals should be focused on viruses and bacteria in the water source and some harmful substances. The sewage produced in the water supply and drainage system in hospitals must be treated by biochemical treatment. In order to clean up the organic pollutants, it is necessary to ensure that they can be discharged after comprehensive disinfection and sterilization. For the treatment solution to be used in sewage disinfection, it is necessary to strictly comply with the requirements of treatment, the effect and the danger in the operation process to screen.
For the wastes and sewage and feces produced by some infectious departments in hospitals, special biochemical treatment must be carried out before the unified drainage system can be used, and the wastewater and sewage produced by other departments in hospitals can be treated in a unified way to ensure that these wastewater is discharged into the municipal government. There will be no serious risk after the system is released, which fundamentally guarantees the safety of water supply and drainage.
2.4 Environmental protection optimization design of hospital water supply and drainage system
Any building water needs to meet the conditions of environmental protection and sustainability, the hospital water consumption is large, there are some waste phenomena, need to be in line with the principle of water conservation, green environmental protection related equipment and water use form design. In view of the water supply system, drainage system and hot water circulation system of hospital buildings, proper water-saving planning is carried out, so as to improve the utilization efficiency of hospital water resources and achieve the goal of saving water resources to the greatest extent. It not only meets the needs of patients, but also achieves the benefits of efficient utilization and environmental protection and hygiene.
3. Concluding remarks
Through the above analysis, the requirements of hospital water supply and drainage system are more clearly defined. In the design of modern hospital water supply and drainage system, various factors should be fully considered to fully ensure the safety and sanitation of water use and the environmental protection of drainage. Different departments design different forms of water supply, and different water quality requirements provide different types of water supply. Water source and hospital water supply and drainage design not only need to meet the basic function of football, but also to ensure its safety and hygiene, not only to consider the overall water demand, but also can not ignore the particularity of water use in individual departments, and make reasonable arrangements.