Method and device for preventing moisture condensation of roof of textile workshop

Abstract

The invention discloses a method and a device for preventing moisture condensation of a roof of a textile workshop. The method comprises the following steps of: using an exhausting and dehumidifying fan in winter: starting the exhausting and dehumidifying fan when the air humidity of the roof reaches the highest limit value of the given relative humidity through an exhausting and dehumidifying pipe net fixed at the lower surface of the roof of the textile workshop, and extracting the humid air around the lower surface of the roof. The device comprises the exhausting and dehumidifying pipe netat the lower surface of the roof of the textile workshop, a humidity sensor, the exhausting and dehumidifying fan and an anti-fogging automatic control circuit; the exhausting and dehumidifying pipe net consists of at least one exhausting and dehumidifying main pipe and a certain quantity of exhausting and dehumidifying branch pipes arranged by a certain regular way; the two sides of each exhausting and dehumidifying branch pipe are at least respectively provided with a row of exhausting and dehumidifying holes or seams arranged uniformly. The invention has good effect of preventing moisture condensation, low cost of application, simple structure and convenient use; and the operation fee is only 4% of the traditional method. The invention can save energy and reduce the power consumption, has good environmental-friendly performance and provides great economic benefits and social benefits in the textile industry.

Description

1. Technical field: [0001] The invention relates to the field of ventilation of textile factory buildings, in particular to a method and device for preventing condensation on the roof of textile factory buildings. 2. Background technology: [0002] The textile production process has strict requirements on temperature and humidity, and it is necessary to maintain relatively high temperature and humidity conditions in the workshop. The requirements for temperature and relative humidity of each main process of textile production are shown in the following table: [0003] [0004] In the winter textile workshop, the temperature is generally required to be 21°C-26°C, and the humidity is 60%-75%. Compared with the cold outdoor temperature and low humidity, especially in the northern winter, the air is dry and cold, so the workshop should maintain such high temperature and high humidity. In the production environment, condensation on the roof is prone to occur. Roof condensatio...

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Problems solved by technology

However, this method is expensive to implement, high in maintenance costs, and consumes a large amount of steam. To generate these steams, a large amount of energy is burned, such as coal, oil, and fuel-fired boilers discharge a large amount of carbon dioxide and dust, which seriously pollutes the environment, especially when energy shortages emphasize environmental protection. Today, the National "Eleventh Five-Year" Development Outline and the "Eleventh Five-Year" Planning Outline of the textile industry have put forward strict requirements on energy conservation and emission reduction in the textile industry, and have formulated specific indicators. This anti-condensation method is neither energy-saving nor energy-saving. Not to mention reducing emissions, it also pollutes the environment, and the cost remains high. Fundamentally, it has fallen far behind the development trend of the modern textile industry.

[0007] To solve the dew condensation on the roof of the factory building, we can also start by improving the insulation performance of the roof, adding insulation materials to reduce the heat conduction, increasing the thickness of the insulation materials on the roof, and doing a good job of insulation during construction. The vapor layer is sealed, and the lower surface of the roof is sprayed with anti-condensation paint. However, it has been proved that these methods cannot prevent condensation when the temperature is low in winter, and greatly increase the construction cost of the plant and prolong the construction period, especially for the completed plant. Can be renovated or rebuilt at a higher cost

Improving the ventilation performance of the roof is also a way to prevent condensation on the roof of the factory. Do several rows of natural ventilators to exhaust the air, or install a roof ventilation fan, or erect an electric axial fan on the roof to ventilate and dehumidify to prevent condensation. These methods can only prevent local condensation on the roof, and it is easy to form a short circuit of air flow on the roof, resulting in a large loss of indoor heat, resulting in a drop in workshop temperature, destroying the production environment in the workshop, and affecting product quality. It is not suitable for textile factories with strict temperature and humidity requirements. Applicable, and some equipment is expensive, and the energy consumption is large, which is not in line with the development direction of energy saving and emission reduction in the textile industry

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