Analysis of advantages and disadvantages of common methods of heating renovation in colleges

Winter heating is an important part of college logistics. Especially in northern colleges and universities, the quality of winter heating is one of the important indicators to assess the level of logistics service. High school is a densely populated area, and its campus heating buildings include student dormitories, classrooms, offices, family buildings and other categories, which consume a lot of energy. Due to the lack of unified planning of city heating, most colleges and universities in northern China still adopt the mode of boiler self-heating.

1.Overall replacement of the boiler

Replaced the original coal burning boiler and gas boiler as a whole for the low nitrogen full premixed condensing boiler, energy saving, environmental protection, can fundamentally solve the problem of boiler emissions levels, a new type of boiler nox emissions are less than 30 milligram, meet the requirements of national low nitrogen transformation, because for one-piece replacement equipment at the same time, the runtime components compatibility is good, high thermal efficiency as a whole. The disadvantage of this method is that the boiler belongs to special equipment, and there are still gas hazard sources in the university after replacing the boiler. Because the boiler still exists, it will occupy a certain campus area, and the overall replacement of the boiler needs a large amount of money.

2.Replace the burner

On the basis of retaining the main body of the original boiler, the burner is replaced, and the low nitrogen emission is realized by replacing the burner. The replacement of the burner is cheaper than the replacement of the boiler, but the transformation effect of the replacement of the burner is not as good as the overall replacement of the boiler, and the nitrogen oxide emission is usually about 30-80 mg after the transformation. Because the burner belongs to the afteraddition equipment, there is a matching problem between the burner and the original boiler body, and there are some hidden dangers in operation.

3.Access to municipal heating pipe network

With the increasing thermal capacity of thermal power plants and heating plants, the coverage of urban heat network is gradually extended to the vicinity of colleges and universities. Municipal heating quality is high. After the university is connected to the municipal government, it will provide heating according to the municipal high standard, which can improve the campus environment, cancel the original boiler in the campus, and reduce the transformation of the heat source equipment in the future. At the same time, the boiler room can be vacated to improve the use efficiency of the property. However, colleges and universities have weakened their control over heating. In the future, the increase or decrease of heating area, adjustment of heating time and heating charge should be negotiated with the heating group. Pipeline and equipment need to be modified according to municipal standards, and the investment is high.

4.Replace other clean energy heating equipment

Clean energy, also known as green energy, will not directly produce environmental pollution. At the same time, in low temperature environment, clean energy can also achieve high efficiency heating, such as air source heat pump using the effect of two-stage compression technology. But at present the scale of clean energy should not be too large. Due to the high outlet temperature of the original boiler, the design of the main pipe is smaller, and the outlet temperature of the heat pump unit is lower, the heating scale is too large, it is likely to appear temperature failure, the host often reported failure and many other problems.