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Small Steam Turbine Cogeneration Plant transformation


Degree, namely, increasing steam pressure, to take advantage of the cooling water temperature increase as the winter heating heating, so that more than meet the requirements of certain thermoelectric. If the steam pressure is less than O. 04IVlPa. As long as the appropriate reduction in the condenser cooling water heat exchange area or to meet the requirements for heat; if the steam pressure in the 0. O4.06MPa within the requirements for high heat, the condenser can be swapped into the winter and summer switch to a different process and taking into account the structure of the condenser thermal expansion. (51 transformation of the steam back pressure turbine when the pressure of ≤ O.29MPa. Turbine exhaust temperature ≤ 230 ℃, it will be converted into steam turbine back pressure turbine, determined by calculating the removal of the original machine after a few levels, re- on the critical speed rotor balancing and accounting, exhaust hood make 0.442MPa hydraulic test to ensure the cylinder seal. When the steam pressure /> 0.29MPa. turbine exhaust temperature ≥ 230 ℃, the exhaust hood must be replaced connected to guarantee some basic and unchanged, the replacement of the steel exhaust hood connection with the original structure size should be after the cylinder condensing steam turbine the same. At the same time together before and after the tank after tank level surface to carve out a dedicated milling machine milling. Running without this device requires scraping to ensure that no steam leakage. If back pressure than 0.5MP, a, before and after the cylinder is sealed with the Ministry of welding to be done while also on the vertical flange,[link widoczny dla zalogowanych], the horizontal flange of the screw strength, cylinder strength accounting, when necessary, increase the coupling flange bolt size and thickness of the cylinder into a back-pressure machines, power must not reach the original condensing steam turbine requirements,[link widoczny dla zalogowanych], taking into account the motor efficiency, the power should be modified to achieve 70% more appropriate. If not meet this requirement, you should adjust the level appropriate to change the nozzle, rotor, stator, and even replace the main steam valve or adjust the steam valve. (more than 61 replacement models a. l ~ 4 measures are adjusted for the extraction of non-use change. steam, and steam requirements for steam quality requirements of the occasion is not strict, which is controlled under normal operating conditions the turbine is achievable if the strict quality requirements of the steam. day and night there with the steam significant changes, replace as adjustable extraction condensing steam turbine in order to minimize investment can request manufacturers to provide consistent connectivity requirements of the original foundation and turbine. or to design a chassis to meet the transition. b. When using steam clock were 75% to 100% range or need to run more than two when the steam pressure, condensing steam turbine will be replaced by back pressure steam turbine or extraction back pressure turbine. 3, must pay attention to the problem of transformation of non-adjustment The extraction turbine extraction steam pressure is unstable, with the new vapor pressure and the extraction of steam into the amount of size change. it into steam directly proportional. and the extraction is inversely proportional to the required amount of steam and in particular into extraction volume to match up to a more stable under the extraction steam pressure which requires power plants to heat the user is currently true for the steam or 3 years to provide accurate planning data as the basis for reform, and proposed to allow non-users to adjust heat pumping The minimum steam pressure to ensure that the steam within a certain range for the use of quality. For the extraction is large and has a large range of Unit, in addition to the above-mentioned turbine flow must be some adjustment, but also on turbine partition at all levels, vibration and the strength impeller Check Calculation of axial thrust, especially before and after the two extraction ports, machine decorated end-strength level and adjust the strength check calculation condition is most important. Intermediate levels before and after reconstruction by the pressure of deciding whether to check by comparing the end of two leaves at the same time allows calculation of the minimum flow. to avoid the stream leaves the phenomenon of stall flutter occurs, f from the rotor vibration and blade fracture. In operating conditions of any permit, are not allowed to have any level of power consumption of the blast and the structure of the population taking into account the extraction flow rate should be controlled at 35 .-- 60m / s in silence. Therefore, if the opening size is large. should be consider the cylinder strength and stiffness. 4 instances of (1 Henanxiangcheng Plant 3MW two N3-24-type condensing steam turbine heat rate as their original 14372.9kJ/kWh, extraction based on the user's requirements. use the first ( 2) a transformation program transformation. to determine non-adjusting extraction pressure O.588MPa,[link widoczny dla zalogowanych], the maximum extraction capacity 12t,} I when into the steam for the 18t / h, the electric power 2Mw,[link widoczny dla zalogowanych], the calculated heat consumption has dropped to 8640kJ / kWh, thermal power than the 100Mw large group of high-pressure heat rate is even lower annual profit of heating up to 20 million, profits of up to 4O million in economic power is considerable, but also produce other aspects of comprehensive benefits. r2) Ningbo Development Zone, Zhejiang Thermal Power Plant transformation of a N6-35-type 6Mw condensing steam turbine, the original heat rate 13l60kJ/kWh,[link widoczny dla zalogowanych], modified down 101037kJ; 'kWh. Estuary Editor: Xiao Min
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