Shanghai Gas Design Institute Ge Zhixiang Tongji University Gas Infrared Research Institute Xu Jizhen gas infrared radiation roast duck oven changed the burning furnace of various roast duck ovens with poor thermal efficiency. The article briefly introduces the design and advantages of the furnace.
1 The status quo of roast duck oven 0, the domestic roast duck oven has no standard, and its form is also various. The roast duck oven made by the roast duck restaurant is endless. Most of these furnaces did not consider the effect of the combustion conditions of the fuel on the efficiency of the roast duck and did not consider the overall thermal efficiency of the furnace. These roast duck stoves can be divided into burning gas burning coal and electric heating of burning fruit wood according to the type of energy used; and it is divided into box type roast duck oven and tubular roast duck oven according to heating method. The following is a brief description of the status quo of the roast duck oven. The character of the box-type roast duck oven-type roast duck oven is a rectangular parallelepiped, which can be made of brick or stainless steel. The side and top of the brick box furnace are made of refractory heat storage bricks, the other side is the furnace door, 1 1 tubular hanging rod 2 refractory heat storage brick 3 furnace door 1.2 tubular duck oven, the character of this roast duck oven is The cylindrical shape, the top of the side and the bottom are welded with stainless steel and the door is open for observation and operation. There are also some sides without a furnace door and the top is an unwelded top cover. Its role is also used for observation and operation.
2 1 small ring 2 large ring 3 furnace wall 4 support foot The top of the roast duck oven has a large steel ring for hanging ducks. The ring is coaxial with the small steel ring on the upper part of the furnace top. During the roast duck process, the large ring can be rotated to rotate the duck in the furnace for uniform baking. The bottom of the roast duck oven is the burning part, and the tubular roast duck stove also has two heating methods. The seed is a small coal stove at the bottom, and the charcoal is used as a fuel for heating. Another kind is an atmospheric burner arranged at the bottom, and the gas is used as fuel.
In summary, at present, there are many varieties of roast duck ovens in China. The heat efficiency of various roast duck ovens is low and the pollution is serious and the degree of automation is low. Therefore, it is urgent to design and manufacture a roast duck oven that is easy to clean and operate and meets the process requirements. Required. In this study, starting from the requirements of the roast duck process, the heating method based on convection heating was changed, and the new gas infrared infrared duck oven was designed based on radiant heating.
2 The design of the new gas infrared duck oven The design of the gas infrared radiation duck oven is designed to be 3 1 chimney 2 burner 3 observation hole 4 support foot 5 temperature display 6 furnace door 7 liquefied gas cylinder 8 pressure regulator 9 transmission device 10 thermocouple liquid tray 3 gas infrared radiation roast duck oven has a viewing hole on the furnace door to observe the baking situation in the roast duck oven. The material used for the observation hole is a high temperature resistant glass.
Place a liquid pan in the lower part of the roast duck oven. It is used to take the oil dripping from the ducks during the roast duck process for centralized treatment.
The support feet raise the position of the roast duck oven, which is convenient for operation. On the other hand, the accessories such as liquefied petroleum gas cylinders can be placed in the lower part of the roast duck oven, so that the structure of the roast duck oven is more reasonable.
The temperature display system mainly includes a nickel-chromium constant-constant copper thermocouple and a butyl-type temperature display device, through which the temperature in the furnace can be measured, thereby controlling the furnace temperature.
We have a chimney on the top of the roast duck oven to remove the exhaust gas and water vapor from the furnace, making the flow in the furnace more reasonable.
To make the duck evenly heated, hang it on the hook that can rotate, make it rotate in the furnace, use the roast duck oven, rotate the shaft sprocket chain hook and the automatic transmission mechanism composed of the motor.
In order to optimize the structure of the furnace to achieve the best baking effect, we conducted a pilot study on the roast duck oven.
The test content is mainly the determination of the burner power and the opening mode of the chimney. Through the experiment, we chose to adopt only the place. Type 5 gas infrared radiator, the power of each radiator is 1.5kW.K shape 4, only the radiators are arranged on both sides of the roast duck oven to open only rectangular chimneys on both sides of the roast duck oven. The flue gas in the furnace can be reasonably flowed, the size of the chimney is 300 parent 40 father 100, and finally we get the performance parameters of the infrared radiation roast duck oven.
Performance parameters gas source liquefied petroleum gas natural gas generation natural gas rated load roast duck only 6 roast duck time 25 minutes flue gas, 3 content exhaust method flue exhaust type 1 metal mesh 2 type porous ceramic plate 3 shunt plate 4 shell 5 ejector 6 nozzle 3 gas infrared radiation roast duck oven advantages Gas infrared radiation roast duck oven using the most advanced infrared radiation baking technology of the current belly, fully utilize the penetration ability of infrared radiation. The furnace has high efficiency and energy saving discharge pollutants with less baking effect. The golden peeled meat of the baked product is fragrant. The device has a temperature display and an automatic rotation function, which greatly reduces the work intensity of the chef. Applicable to major hotels and other catering units.
In order to improve the energy-saving effect of the roast duck oven, we performed thermal equilibrium analysis and thermal efficiency calculation on the roast duck oven. It has been calculated that its thermal efficiency reaches 8.2, which is significantly higher than traditional products.
In summary, the advantages of the gas infrared radiation duck oven are applicable to gaseous fuels, which can reduce pollution. The convenience of the operation of the people makes full use of the advantages of infrared heating, and must meet the requirements of the roast duck process with temperature display and automatic rotation function, more uniform baking, better roast duck effect, complete premixed combustion of the burner, complete combustion, heating with high temperature radiation Main, furnace efficiency, energy saving, pick up page 41
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