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 Wysłany: Sob 22:07, 04 Gru 2010 Temat postu: uggs sale Grain dryer heat pipe air preheater supp |
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Grain dryer heat pipe air preheater supporting research
. / H = 3.33m. / S (2) flue gas velocity in the pipe VV basket 12.33 m / S (3) preheater flue gas commission cross-sectional area S within the minimum ventilation smoke cigarettes = O. S 8x0o9-10 × O. 025XO. 8 = 0.52m0 (4) preheater tobacco smoke Shen above V = 6.40m/S3,[link widoczny dla zalogowanych], gas flow and air flow in the preheater of the velocity ratio Y = Xi _1.454,[link widoczny dla zalogowanych], calculated the same way 6Tl / h boiler preheater flue gas flow rate, V http (6 tons) = 9.6m / s velocity ratio is calculated tY ={÷}= 2.18 can be inferred from the above, once the leakage urinate in the diaphragm, the air some of the speech into the flue gas in the flue gas into the air will not result in drying of materials (food) in the pollution and loss. VIII, Analysis and Forecast 1, coal cost (taking the theoretical values calculated parameters of the lower limit) (1) The device can reduce the exhaust gas temperature of 70 ~ 8OqC, as calculated by 7O ℃. (2) 4T / h boiler flue gas volume theory is 12000m. Such as diffuse damage and leakage considered fan, take 10000_m. i. t count. (3) Calculate the heat released from gas discharge Q = V (C1t1 a Cft2) a i0000x (1.4788 × 230-1.4478 × 160) = 1084760K2 / h (4) RK-1-type heat pipe air preheater efficiency of 8O ~ 90, closing off limits 8O% Q = Q put × 801084760 × 80; 867808K. 1 / h (5) conversion of standard coal (coal equivalent calorific value q = 29260KJ/kg) m subscript a = 29.66kg / h ・ 22 ・ practical energy 1989 3 (6) the average daily work 2ozb dryer , a dry period is calculated by half of standard coal in total savings of a dry period (a dry period of 180 days): M = 29.66X20 × 180-106776 kg 106.78 t (7) per ton of standard coal economizer 150 were calculated according to economic efficiency (theoretical lower limit) is 150 × 106.78-15016.4 2 million 1.6 million, saving the amount of steel used in a grain dryer preheater, than the traditional process can be save 3 to 5 tons of steel, such as the calculation of 4 tons of steel by 1,[link widoczny dla zalogowanych],500 yuan / ton of steel is cost savings 1500X4 = 6000 yuan = 06,000 yuan 3, a heater economizer savings only steel two In a dry period (six months). The real benefits of 1.6 +0.6 = 2.2 million 4, payback period (1) equipment to take maximum initial investment is 1.6 million (2) the recovery period is Y = ÷ = 0.73 (drying period) ● = 4.38 (months). Can be the equivalent of about 4 and a half months early recovery equipment investment. Thus, RK-l-type heat pipe air preheater is an ideal energy-saving devices. Jiong balance the use of the concept of deepening the energy because of energy with the quantity and quality of the points,[link widoczny dla zalogowanych], the energy loss in the number of relatively easy to arouse people's attention, but not according to its quality, and quality has resulted in enormous waste of energy, but often easily ignored by everyone. Should the l3 kg / square centimeter to 3-6 Buck Steam / kg sq cm when used, the number of ships by the heat balance calculation, step-down the loss of heat, about l the following, but if the quality of available energy by the energy calculation, The energy generated by the quality (effective to) the loss of heat loss than the large l0-20 times. Therefore, in the process, the need to use the heat source must be in accordance with the use of low-bit digital temperature should not be replaced by other heat sources can not be completed only when its heat to the principle of using furnace heating. Must also pay attention to heating and energy use for power the way the two complement each other,[link widoczny dla zalogowanych], comprehensive utilization, such as combined heat and power, process and power station and other associated technical measures to improve energy efficiency. Polyester Plant of Shanghai Petrochemical Plant introduction of para-xylene oxidation unit, owned by a balance computer for analysis and found that lower quality of energy use, unreasonable matching up more than 30, targeted technical measures summarized l8 , after a preliminary analysis, technical reform measures, will make the energy of terephthalic acid by the thousands of reports 1987 260.69 / ton reduced to 143 kcal / ton of international advanced level. This shows that, by} I present analysis, the unit is still further noted that there is a huge energy potential, the product can reduce energy consumption by 45%. Fan attention and use of the concept of deepening the energy is of great practical importance, is being further explored. (Wu Lan Abridged)
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