54results about How to "Reduce heat rate" patented technology

The invention discloses a double backpressure condenser optimized operation device and an operation method thereof. The double backpressure condenser optimized operation device comprises a high backpressure condenser, a lower backpressure condenser and a circulating water pipeline, wherein two bypasses and a control valve are arranged on the circulating water pipeline, the bypasses are connected with the two ends of the low backpressure condenser in a crossing manner, and a plurality of temperature measuring points and flow meters are arranged. Compared with the prior art, the double backpressure condenser optimized operation device has the advantages that circulating water flow rate of the low backpressure condenser is independently controlled, the circulating water flow rate of the high backpressure condenser is not influenced; by virtue of a calculation formula provided by the invention as well as the measuring points and a valve control system, the low backpressure side condenser is vacuum and does not enter a blockage backpressure region, and heat rate of a steam turbine is reduced; and due to influence of the circulating water bypasses, water inlet temperature of circulating water at the high backpressure side condenser is relatively low, and high backpressure side exhaust temperature is indirectly lowered, so that the heat rate of the steam turbine is further reduced.

The invention discloses a heat recovery system with a plurality of stages of hybrid heaters. Specifically, the heat recovery system comprises a BEST machine, five high-pressure heaters, five low-pressure heaters, the two to five hybrid heaters, boosting pumps and a condensate pump; each hybrid heater is configured with the corresponding boosting pump; the condensate pump is positioned between thelow-pressure heaters and a steam condenser; extraction steam of the first high-pressure heater is from a main steam turbine; the extraction steam of the second high-pressure heater to the fifth high-pressure heater is from the BEST machine; steam sources of the hybrid heaters are all from the BEST machine, wherein the steam source of the last stage hybrid heater is from the exhaust steam of the BEST machine; the extraction steam of the five low-pressure heaters is from the main steam turbine; and the last stage hybrid heater is connected with one of the low-pressure heaters, and the water supply of the last stage hybrid heater is from the low-pressure heater. According to the heat recovery system with the plurality of stages of deaerators, the circulating efficiency of the system is improved; the superheat degree of the steam is fully utilized; the project cost is reduced; the cold end loss of the steam is reduced; and the heat recovery system with the multiple stages of deaerators isparticularly suitable for the situation that the steam extracting steam of a plurality of heaters are close to the saturation pressure of the steam, and the feed water flow is large.