Taibang sharing - ZYB residual oil pump ZYB-4.2/2.0 flat flame burner structure and principle
The structure and principle of the ZYB residual oil pump flat flame burner are detailed. The flat flame burner is the gas that enters the burner and the air required for combustion. Under the action of the cyclone, the gas and air rotate strongly, along the vertical The surface of the furnace wall of the mouth brick is unfolded and burned in a layer of space close to the furnace wall to form a disk-shaped flame having a diameter of 1 to 3 m and a thickness of 100 to 200 mm. After adopting the flat flame burner, the heat radiation capacity is enhanced and the temperature field is uniform, so the heating rate is fast, the metal oxidation burning rate is low, and the steel material has uniform heating, rapid heating, and fuel saving has remarkable effects.
ZYB residual oil pump Gas flat flame burner 1. Structural principle This type of burner uses coke oven gas as fuel. The gas and air entering the burner of the heavy oil pump are strongly rotated along the surface of the furnace wall perpendicular to the center line of the ZYB residual oil pump nozzle. The flat flame is formed by mixing and burning in a space close to the surface of the furnace wall, and the flame has a diameter of 1 to 3 meters and a flame thickness of 100 to 200 mm. After the flat flame burner is used, due to the strong radiation capability and uniform temperature field, the steel can be uniformly heated and heated quickly, saving fuel significantly.
ZYB adjustable pressure residue oil pump burner structure is shown in Figure 1. Performance data, see Table 1; structural dimensions, see Table 2.
Second, the burner performance data and technical performance burner type burner energy (standard meter 3 / hour) gas low heat (kJ / 3 meters) before the burner gas pressure (Pa) before the burner air pressure (Pa) PM-III-1 30 13400～17600 Rated 16750 2000 2500 PM-III-2 50 PM-III-3 75 PM-III-4 100 PM-III-5 120 PM-III-6 160
Third, the instructions for use
1. 2CY gear oil pump The coke oven or city gas used in the burner has a calorific value ranging from 3200 to 4200 kcal/m3. When the burner type is selected, the calorific value according to the actual gas can be used according to the burner performance table. The rated gas calorific value is converted into the burner energy, and the burner type is selected accordingly.
2ZYB residual oil pump. When preheating the air, the burner energy is reduced to the following values ​​(the gas pressure before the mouth is constant): Air preheating temperature (°C) 150 200 250 300 350 400 Energy is a percentage of normal quantity (%) 80 76 72 70 65 64
3. When the gas pressure before the burner is 700Pa, the burner can also burn normally;
4. The rotation direction of the ZYB high-pressure gear pump burner flame is different from left and right. When used in parallel in the same kiln, it is better to turn the flames of the adjacent two burners to the opposite direction;
5. After using the burner for a period of time, the nozzle of the gas nozzle should be cleaned.
Fourth, the installation requirements
1. RY air-cooled centrifugal hot oil pump burner can be installed on the side wall or the top of the furnace. When installed on the top of the furnace, the external dimensions are shown in Figure 1. Remove the beveled sides of the burner bricks shown in the figure when mounted on the side wall;
2. The inner plane of the burner brick and the inner plane of the furnace wall (top) are kept flat, and the plane of the furnace wall (top) is not allowed to protrude, which affects normal combustion;
3. After positioning the burner, connect the pipe again. The pipe installation should not affect the positioning of the burner.
Five, ignition
1. ZYB residual oil pump opens the furnace door and the flue ram, opens the blower, and purifies the combustible gas in the furnace;
2. Ignition. Micro-open the air butterfly valve in front of the burner for a small amount of air. Place the open flame on the root of the flare of the burner brick and open the gas valve. Adjust the ratio of empty gas after the fire to reach the best condition. In the future, we should pay attention to the changes in pressure and flow of gas and air at any time, and adjust them in time to keep the combustion stable;
3. If the BWCB insulated asphalt pump is not ignited at one time, immediately close the gas valve, open the air valve, re-purge and find out the cause and then ignite again;
4. Close the gas valve first when stopping the furnace. More browsing:
Polysaccharides are polymeric carbohydrate molecules composed of long chains of monosaccharide units bound together by glycosidic linkages, and on hydrolysis give the constituent monosaccharides or oligosaccharides. They range in structure from linear to highly branched. Examples include storage polysaccharides such as starch and glycogen, and structural polysaccharides such as cellulose and chitin.
Polysaccharides are often quite heterogeneous, containing slight modifications of the repeating unit. Depending on the structure, these macromolecules can have distinct properties from their monosaccharide building blocks. They may be amorphous or even insoluble in water. When all the monosaccharides in a polysaccharide are the same type, the polysaccharide is called a homopolysaccharide or homoglycan, but when more than one type of monosaccharide is present they are called heteropolysaccharides or heteroglycans.
Natural saccharides are generally of simple carbohydrates called monosaccharides with general formula (CH2O)n where n is three or more. Examples of monosaccharides are glucose, fructose, and glyceraldehyde. Polysaccharides, meanwhile, have a general formula of Cx(H2O)y where x is usually a large number between 200 and 2500. When the repeating units in the polymer backbone are six-carbon monosaccharides, as is often the case, the general formula simplifies to (C6H10O5)n, where typically 40≤n≤3000.
As a rule of thumb, polysaccharides contain more than ten monosaccharide units, whereas oligosaccharides contain three to ten monosaccharide units; but the precise cutoff varies somewhat according to convention. Polysaccharides are an important class of biological polymers. Their function in living organisms is usually either structure- or storage-related. Starch (a polymer of glucose) is used as a storage polysaccharide in plants, being found in the form of both amylose and the branched amylopectin. In animals, the structurally similar glucose polymer is the more densely branched glycogen, sometimes called "animal starch". Glycogen's properties allow it to be metabolized more quickly, which suits the active lives of moving animals.
Cellulose and chitin are examples of structural polysaccharides. Cellulose is used in the cell walls of plants and other organisms, and is said to be the most abundant organic molecule on Earth.It has many uses such as a significant role in the paper and textile industries, and is used as a feedstock for the production of rayon (via the viscose process), cellulose acetate, celluloid, and nitrocellulose. Chitin has a similar structure, but has nitrogen-containing side branches, increasing its strength. It is found in arthropod exoskeletons and in the cell walls of some fungi. It also has multiple uses, including surgical threads. Polysaccharides also include callose or laminarin, chrysolaminarin, xylan, arabinoxylan, mannan, fucoidan and galactomannan.
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