A Sewage Heat Exchanger Using Composite Heat Exchange Surface and Its System

Abstract

The invention relates to a sewage heat exchanger using a composite heat exchange surface and its system. The device is applied to a sewage source special heat pump that directly exchanges heat with raw sewage. The sewage source heat pump uses urban raw sewage as a low-level cold and heat source. The main equipment for heating and cooling the building consists of a shell, inspection door, front pipe box, gaseous working medium outlet, liquid working medium inlet, liquid working medium outlet, gaseous working medium inlet, sewage inlet, handle, sewage Water outlet, rear pipe box, compound heat exchange surface, corrugated thin plate, heat exchange tube, sewage channel partition, sewage heat exchange channel, working medium partition, opening on the partition, opening under the partition, front tube plate, rear tube board composition.

Description

technical field [0001] The invention relates to a sewage heat exchanger using a composite heat exchange surface and its system. The device is applied to a sewage source special heat pump that directly exchanges heat with raw sewage. The sewage source heat pump uses urban raw sewage as a low-level cold and heat source. The main equipment for heating and cooling the building. Background technique [0002] Energy is an important material basis for the survival and development of human society. Finding and utilizing new renewable energy is an effective way to solve energy shortages. Developing and utilizing urban raw sewage as a low-level cold and heat source for heat pumps provides heating and power supply for buildings. Cooling has important energy-saving and environmental protection values, and is of great significance to alleviating energy consumption tension and reducing environmental pollution. However, raw sewage contains a lot of dirt, fibers and hair. If it goes direct...

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Problems solved by technology

However, raw sewage contains a lot of dirt, fibers and hair. If it goes directly into the heat exchange equipment for heat exchange without any treatment, it is easy to block the heat exchange equipment and cannot operate normally.

[0003] In addition, if the indirect heat exchange system is adopted, that is, the raw sewage enters the heat exchanger to exchange heat with clean water, and then the clean water enters the conventional heat pump unit for heat exchange to realize the utilization of raw sewage. This system increases the intermediate heat exchange link. The temperature of the clean water entering the heat pump unit in summer is about 5°C higher than that of the raw sewage, and the temperature of the clean water entering the heat pump unit in winter is about 5°C lower than that of the raw sewage. Compared with the raw sewage directly entering the heat pump unit, the efficiency of the system is relatively lower

In addition, the use of an intermediate heat exchange system increases the investment in intermediate heat exchange equipment, increases installation costs, and increases the area of ​​the machine room

[0004] Some shell-and-tube sewage heat exchangers use heat exchange tubes arranged side by side to form a heat exchange plane, and multiple nozzles are welded to a main pipe. If a single heat exchange tube leaks, maintenance is more troublesome. In addition, the pipes are arranged side by side. When arranged, the seal between the tubes is also difficult to meet the requirements of no leakage

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