Micro-positive pressure ventilation system in livestock and poultry houses: gas-gas heat exchanger helps energy-saving ventilation in breeding environment

In large-scale pig farms, chicken farms and other livestock and poultry farms, animals in the house continue to produce pollutants such as heat, water vapor, carbon dioxide and ammonia, which need to be discharged in time through the ventilation system. Although the traditional negative pressure ventilation has a simple structure, it is easy to cause a lot of cold air to enter the house directly in winter, which increases the heating energy consumption and easily produces local cold air. The micro-positive pressure ventilation system establishes a stable micro-positive pressure environment through the air supply end, so that fresh air can enter and distribute evenly in the set direction, which is helpful to improve the air quality and temperature environment in the house.

Micro-positive pressure ventilation usually consists of a new fan, an air supply duct, an exhaust system and an air-gas plate heat exchanger. The outdoor fresh air first passes through the filtering and heat recovery module, and indirectly exchanges heat with the warm air discharged from the livestock and poultry house, and then the heat in the exhaust air is recovered and sent into the house. In winter, the exhaust waste heat can be used to preheat fresh air and reduce the operating load of heating equipment; In summer, the temperature of fresh air entering the house can be reduced by heat exchange. Because fresh air and dirty exhaust air are completely isolated inside the heat exchanger, the problem of odor, dust and pollutants flowing back with the air can be reduced.

Livestock and poultry breeding environment is characterized by high humidity, high dust, ammonia and corrosive gases, so the material and structure of heat exchange core are very important. Aluminum foil plate heat exchange core can be used in ordinary environment, and hydrophilic aluminum foil can be selected in high humidity environment; For breeding houses with strong corrosiveness, epoxy coated aluminum foil or stainless steel gas-gas heat exchanger can be used. At the same time, the maintenance of filter screen, the discharge of condensed water and the cleaning of heat exchange core should be considered to ensure the heat exchange efficiency and ventilation during long-term operation.

At present, micro-positive pressure ventilation and heat recovery technology have been applied to large-scale pig houses, chicken houses, cattle houses, brooding houses and other modern livestock and poultry farms. Through the combination of fresh air filtration, micro-positive pressure air supply and waste heat recovery, the indoor air quality can be improved and the heat loss caused by ventilation in winter can be reduced, so as to achieve both ventilation and energy saving. Zibo Qiyu Air-conditioning Energy-saving Equipment Co., Ltd. can provide gas-gas heat exchanger, heat recovery core and supporting equipment for ventilation and heat exchange in farms, which can be customized according to the air volume, temperature, humidity and installation conditions of breeding houses.

Contact: Yang Jingli 15753355505.