How to transform the heating pipe network in old residential areas, and what are the key points and transformation measures?

Central heating is a systematic project, which is organically linked by heat source, pipe network and heat users. Heating pipe network is a pipeline system that transports and distributes heating media to heat users.

With the advancement of urbanization, the central heating industry in various provinces and cities in China has developed rapidly, and the heating capacity has been continuously strengthened. At the same time, a large number of heating pipelines that have been shut down have also been produced. Capital cities such as Beijing, Zhengzhou and Jinan. It has been running the heating pipeline/kloc-for more than 0/5 years, which can be said to be blooming everywhere.

For the old residential district, the heating pipe network in the residential district runs for a long time, the technical level is backward, and leakage and tube explosion occur from time to time, which seriously affects the safety and quality of heating, and also increases energy consumption and pollutant discharge. This paper will analyze the existing problems of heating pipe network in old residential areas, hoping to provide important reference value to relevant people.

Problems existing in heating pipe network in old residential areas

1 Components in the heating pipe network of the old community, such as pipes, valves, supports, instruments, insulation, etc. Lack of proper maintenance has caused corrosion and damage to heating facilities to varying degrees. It is the most common phenomenon in the old heating district that the bracket is tilted and dislocated, the insulation layer is seriously damaged, and the valve cannot be opened and closed due to corrosion. Once the pipeline leaks, stopping heating and repairing it will have a great impact on the whole heating system of the community, and will also affect the normal heating in other areas. In addition, leakage often causes water accumulation in courtyards, corridors or user rooms at the same time, which brings economic losses.

2. The pipe diameter and heat load of the heating pipe network in the old residential area do not match the design parameters, and the hydraulic power of the pipe network is seriously out of balance, lacking the necessary control and adjustment means, resulting in uneven cooling and heating of buildings and units and a large number of complaints from users.

Due to the lagging reform of heating system, individual communities are still responsible for heating by property or developers themselves. In the early stage of heating pipeline construction, materials such as pipeline, insulation, compensator and valve were not selected according to the design. The construction unit cut corners in the construction process and failed to carry out the construction according to the relevant national standards, resulting in poor construction quality, aging of heating pipe network and facilities during operation, and hidden dangers.

In some residential areas, most heating pipe networks are collectively built by heat users and managed by contractors. With the passage of time, the property rights of some houses and units have also changed, which makes the property rights of heating very complicated and gradually forms a situation in which no one is responsible.

With the change of market economy, the construction cost of heating pipe network is increasing year by year, but the property and owners of old heating communities often give up reconstruction because of the high price.

Renovation scheme of heating pipe network in old residential area

1 Overall layout of heating pipe network

When designing the heating pipe network, the overall planning should be carried out according to the heat load of the residential area, the hydraulic calculation and pipe diameter selection of the pipe network should be carried out reasonably, and the direction of the heating pipes in the residential area should be arranged reasonably. In the planning process, we should not only consider the current situation, but also budget and plan the future. Therefore, in the actual design, we should not only conform to the actual situation, but also leave room for development in the future.

2 Pipe network laying mode

In the past, heating pipelines were mainly laid in trenches, which had many problems. Among them, rock wool thermal insulation material is mainly used for laying pipelines in ditches, which has poor waterproof and thermal insulation performance, resulting in long-term hot and humid environment, large heat loss and short pipeline life. The transformation method can be directly buried, and the pipeline adopts prefabricated directly buried thermal insulation pipe, which is closely combined with rigid polyurethane foam thermal insulation material, polyethylene protective shell and steel pipe. It has good thermal insulation effect and certain compressive strength. For overhead pipelines, a layer of galvanized iron sheet can be wrapped after construction to avoid pipeline exposure and prolong the service life of pipeline insulation layer.

3 secondary network metering energy-saving transformation

Combined with the tasks of heat metering and energy-saving transformation of existing residential buildings, hydraulic balance devices and heat metering devices are installed in the secondary network and user entrance. The installation and construction of equipment should be fully considered in the transformation, which is convenient for future maintenance, management and use. Practice has also proved that the balance valve can effectively improve the efficiency of heating system, reduce the energy consumption of pipeline, reduce the project cost and ensure the smooth operation of heating system.

4 Transformation Fund

Give play to the role of market mechanism, extensively open up social financing channels, fully mobilize social funds to participate in the transformation, and realize diversification of investment subjects and financing channels. Some areas can refer to the implementation of the "three for one industry" transformation plan. The funds for the renovation of the old central heating pipe network are mainly invested by enterprises. The local government should increase financial policy support, support the transformation of the pipe network, and ensure that the transformation project can be successfully completed as planned.

5 Other transformation measures

Due to the large number of complaints from users during the heating season, the heating quality is poor. Therefore, in practice, we should investigate and feedback the information and complaints of heating users in time, find out the causes of the problems in time, and carry out the secondary pipe network transformation in old communities according to the specific problems reflected by some users.

The transformation of heating pipe network in old residential areas involves many factors and links, and good transformation can bring more economy and comfort. The transformation not only brought considerable energy-saving benefits, but also played an important role in ensuring people's livelihood and social stability. We need to pay enough attention to ensure that all links can be safe and reliable, effectively prevent energy waste and improve energy utilization efficiency.

I believe that after the above introduction, everyone has a certain understanding of how to transform the heating pipe network in old residential areas, what are the key points and transformation measures. Welcome to Zhong Da for more information.

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