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Dust removal system to improve the life of technical measures Fan


,[link widoczny dla zalogowanych],> X \Fuel & Chemical hI & ChemlcalProcessesMay2007V0】. 38No. 3 dust valve is closed at point A,[link widoczny dla zalogowanych], the other points are still working dust, dust removal system to reduce the required amount of wind to Q: (the other point of dust removal and air volume of the j. Q2 = Q Factory (6) A one point for the vacuum dust at the amount of wind; Q., Q broadest sense as before. Southern-style (6) shows that the resistance increment AP system with the increase of Q. In order to maintain the system, other points of the dust, dust removal system to overcome the resistance . fan can not adjust to the wind and dust removal system for the same amount of wind. blower is always greater than the theoretical air volume air flow required for dust removal system. When Q is small, not to set the balance valve, self-regulation by the pipeline; when the Q more large, the system still need to set balancing valve adjustment:. for the use of fluid coupling speed of the ventilation unit. balancing valve and vacuum point A door, fan up, see the relationship between deceleration Gang 5. 3.3 reduce the system just the incremental rate of change of the resistance equation (5) shows that the incremental rate of change of resistance increases with the t decrease. Dust point of the valve opens, changing the line closed characteristics. reduce the incremental rate of change of system resistance effective method is to extend (Figure 1) is not continuous at the dust point A to switch the valve from opening to close (or from off to on) the time to ask, just to avoid the rapid change in the system arising from the resistance of the fan rotor \braking \Company, Wuhan 430082) According to the construction of 50MW LIANGANG a sub-shaft gas-steam combined cycle power plant needs,[link widoczny dla zalogowanych], waste heat boiler using the following design. a boiler arrangement (1) horizontal arrangement of the boiler, flue and the gas turbine front row into the El vent phase. gas levels were flowing through the superheater heating surface, evaporation economizer tubes, low flow control, and then discharged into the chimney. all the heating surface are staggered by the vertical suspension of the finned tube arrangement. take full advantage of clean and smoke. pollution. compact layout. (2) cross-superheater around in the middle of mixing to reduce the steam temperature non-uniformity. the El steam temperature with water adjusted to meet the needs of turbine operating conditions. (3) Pressure needs to absorb most of the heat convection tubes to meet the water became steam latent heat of evaporation. A number of upper and lower header tubes formed group, down pipes to ensure that the natural water cycle, each has a separate set of boxes sent to the drum steam tube leads to ensure water circulation loop under different thermal loads of security. (4) economizer cycle using force, due to limited space,[link widoczny dla zalogowanych], designed to increase a down processes to ensure economizer is not boiling. descending ascending water velocity is the speed of water 3 times. to ensure that there are deviations in the endothermic gas was taken or air bubbles. (5) low-voltage systems for the oxygen pressure in the boiler feed water to provide heat at the same time. In the final low-temperature flue gas heat absorption. must be Received: 2007 About a Ol-o9: Huijian n ~ J (] 965 a),[link widoczny dla zalogowanych], M, D engineers to meet the high temperature heat transfer requirements. recommend the use of low-pressure system pressure is 0.035MPa. saturation temperature of l08 ℃. (6) own oxygen equipment. enthalpy part of the flue gas to be used for oxygen. the pressure in the boiler feed water from the outside in addition to salt for 20 ℃ and 45 ℃ temperature condensate return to the 0.035MPa boiling temperature under 108 ℃. to ensure Introduction of oxygen dissolved in the water out. so that the boiler metal from corrosion. low pressure boiler system as a whole low-pressure oxygen installations. pressure 0.035MPa. to replace the low pressure drum, deaerator tank. deaerator directly at low pressure drum on. convection tubes of steam generated from the drum directly into the deaerator. spray of water mixed with the above heat and oxygen. oxygen directly into the drum after the water from lead pipes to the pressure in the boiler feed pump. sent to the pressure in the boiler economizer. this went deaerator and water tank footprint. cancel the low voltage and low pressure boiler water supply system sewage dosing. simplified heat and control systems. (7) steel frame, platform escalators. geological conditions of the boiler in which the degree of seismic intensity of 6 second-class venue, the design according to the basic seismic acceleration is 0.05G. steel single row of column types. all the heating surface are suspended in the roof steel frame. Department of the open layout of the boiler steel Buddhist monk's robe to take account of local wind load and snow loading. ( furnace wall, guard. furnace wall furnace with double wall metal sheeting. in the flue wall located within the metal shield. gas temperature used in paragraph