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Application and design considerations of gas radiant heating in large-space industrial plant

time：2023-07-25
hits：1816次
source：正弘奧能

Gas radiation heating is the use of natural gas, liquefied petroleum gas or artificial gas and other combustible gas, burning in a special combustion device - radiation tube and radiation of various wavelengths of infrared radiation heating.Different wavelengths of electromagnetic waves, after contact with the object, will produce different effects.The electromagnetic wave with a wavelength between 0.76 and 1000 microns, especially the electromagnetic wave with a wavelength between 0.76 and 40 microns, has non-dispersion, so the energy is concentrated and the thermal effect is significant, so it is called heat rays or infrared rays.The infrared wavelength emitted by the gas radiation tube is exactly in this range.Since radiant heat is not absorbed by the atmosphere, it is absorbed by various objects such as buildings, human bodies, equipment, and so on, and is converted into heat energy.The body that absorbs the heat rises in temperature, and again heats other objects around it, such as the atmosphere, in the form of convection.Therefore, the atmospheric temperature inside the building does not produce a serious vertical imbalance.Therefore, it has a high utilization rate of heat energy and makes the human body feel very comfortable.Therefore, gas radiation heating is an ideal heating method for tall Spaces such as industrial plants.


	 


	<img src="http://www.wmkan.com/Uploads/image/20230725/20230725173848_65228.png" alt="" /> 


	 


	The following, industrial building heating ventilation and air conditioning design code GB50019-2015 relevant specifications, in the use of gas radiation heating equipment, the design of indoor temperature should pay attention to the following:


	 


	5.5 Gas infrared radiation heating 


	 


	5.5.1 In places without electrical explosion-proof requirements, gas infrared radiation heating can be used when the technology and economy are reasonable.When using gas infrared radiation heating, the following provisions shall be met:


	 


	1. When the maximum concentration of flammable substances that may occur does not exceed 10% of the lower limit value of the explosion, the burner should be set outdoors;


	 


	2. When the burner is set indoors, ventilation safety measures should be taken, and should comply with the relevant provisions of the current national standard "Urban Gas Design Code" GB 50028.


	 


	5.5.2 Gas infrared radiation heating is strictly prohibited for Class A and B production plants and warehouses.


	 


	5.5.3 The fuel of gas infrared radiation heating system should meet the quality requirements of urban gas, natural gas should be used, liquefied petroleum gas, artificial gas can be used.The gas inlet pressure should be commensurate with the pressure required by the burner.The fuel should be fully gasification, and when liquefied petroleum gas is used in cold and cold areas, measures should be taken to prevent gas from being liquefied again due to low ambient temperature of pipeline installation.Gas quality, gas transmission and distribution system shall comply with the current national standard "Urban gas design Code" GB 50028 provisions.


	 


	5.5.4 When gas infrared radiation heating is used, the heat load shall be calculated in accordance with the relevant provisions of Section 5.2 of this Code, and the calculated indoor temperature shall be 2℃ ~ 3℃ lower than the air temperature in the convective heating room.When air is supplied from the chamber to the burner, the heat load required to heat that amount of air should also be calculated.


	 


	5.5.5 The installation height of the gas infrared radiation heater shall comply with the following provisions:


	 


	1. Should be determined by the production process requirements and human comfort according to the radiation intensity of the heater and the installation Angle.Except for special requirements of the process, it should not be lower than 3m.


	 


	2. When used for heating in fixed working places, it should be installed above the side of the human body.


	 


	3. When the installation height exceeds the maximum height of the rated heat supply, additional corrections should be made to the total input heat of the heater.


	 


	5.5.6 When gas infrared radiation heating is used for comprehensive heating, the heater should be arranged along the external wall, and the heat dissipation of the heater should not be less than 60% of the total heat load.


	 


	Because the gas radiant heating system realizes the heating without open fire and the completely safe opening and closing and negative pressure operation, it provides a reliable guarantee for the safe operation of the heating system.In addition, the radiation tube plate of the gas radiant heating system can be arranged according to the location of the working area in the building, which can effectively improve the utilization rate of the heating equipment.The radiant tube plate can be set on the steel beam in the workshop, which does not occupy the area of the ground working area, effectively improves the use area of the processing workshop, and is both beautiful and practical.


	 


	<img src="http://www.wmkan.com/Uploads/image/20230725/20230725173916_73185.png" alt="" /> 


	 


	IMPRESIND gas radiation heating system as the main heating equipment of Beijing leadway Power Co., LTD., through more than 10 years of promotion and application, has become one of the leading products in the Chinese market.Ipside gas radiant heating system eliminates large and complex boiler and boiler room equipment, short installation cycle, and does not occupy the building's use area.There is no loss of gas in the transmission process, and the combustion of the generator is very complete, so the heat of the entire heating system can be fully utilized.