Heating energy-saving system with increased capacity and heat

Abstract

The invention discloses a heating energy-saving system with increased capacity and heat. When the actual heating area is larger than the originally-designed heating area, the system adopts the technical scheme that a first-stage heat exchange station and a second-stage heat exchange station are internally and respectively added with a cold-heat double-effect energy-saving heat pump to achieve thepurpose of increasing heat and capacity. The heating energy-saving system with increased capacity and heat disclosed by the invention has the beneficial effects that the heat transferring capability of a primary network is fully utilized, the structure is simple, the investment is less, the layout is flexible, the construction period is short, the problem of huge investment of pipe network re-laying is solved, the problem of environmental pollution caused by addition of a peak regulating boiler is also avoided, and the heating energy-saving system is an integrated energy-saving application which can be in more conformity to the policy 'switching from coal to electricity' advocated by the government; the temperature difference of supplied water and returned water of the primary network is larger, and the transferring-capability utilization rate for the original network is higher.

Description

technical field [0001] The invention relates to energy development and utilization technology, in particular to a capacity-increasing and heat-increasing energy-saving heating system. Background technique [0002] At present, in the design and planning of heating pipelines, the speed of urban development is not expected enough, and the heating area covered by some secondary heat exchange stations has greatly exceeded the originally designed heating area. Although the transmission capacity of each secondary pipe network can still meet the requirements, due to various other reasons, it poses a huge challenge to the operation of each secondary heat exchange station. At present, it is impossible to normally guarantee the heating needs of residents in the coldest days, and solutions for heating and capacity expansion are urgently needed. [0003] Considering that the heat transported by the pipe network is proportional to the "flow rate" and the "temperature difference between s...

AI Technical Summary

Problems solved by technology

Among them, it is very easy to achieve from the perspective of increasing the water supply temperature of the primary network. It only needs to add a steam-water heat exchanger or a peak-shaving boiler in the first station of the thermal power plant. However, considering the following factors, this direction cannot fully complete the expansion needs

[0004] (1) Limited to the limit of the maximum temperature of the heating network, the room for increasing the water supply temperature is limited;

[0005] (2) Increasing the water supply temperature will additionally increase the heat exchange load of the secondary heat exchange station that does not need to be expanded, resulting in excessively high heating temperatures in the corresponding districts and parks, resulting in energy waste

The conversion of coal to gas, commonly known as "coal to gas", can reduce the emission of harmful pollutants to a certain extent, but "coal to gas" has been implemented for many years and has not improved the situation of smoggy weather

In particular, the secondary heat exchange station is basically built close to the residential area, which is also a potential source of smog to a certain extent, which is not conducive to the improvement of the living environment of residents

Therefore, in terms of environmental protection, it is not recommended to use gas-fired peak-shaving boilers to solve the problem of heat increase and expansion. It is also a potential source of smog, which is not conducive to the improvement of residents' living environment.

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