SU1201535A1 - Steam-turbine plant - Google Patents

Abstract

1. A STEAM TURBINE INSTALLATION, containing a turbine and a network heater with direct and return network water mains and a retaining organ installed in the latter, which stores the capacity of the cooled network water connected at the inlet to the water cooler outlet and at the outlet through a pipeline with a pump to the backwater mains backwater line after the retaining organ, and at least two storage tanks of the hot water netlines, the first of which are connected at the inlet to the backwater network to the retaining water line Ghana, and the second inlet conduit by means of - a straight line lo. The primary water and the outlet to the return water line after the retaining member, characterized in that, in order to increase the efficiency and increase the adjustment range of the output power, the first accumulator has a capacity of hot utility water connected to the return line at the outlet with the pumps installed on them water supply after the retaining organ and to the inlet of the second storage tank of the hot network water, and the water cooling water inlet is connected via heating water to the return line (L 2. Installation according to claim 1, from the fact that the pipeline connecting the second storage tank to the direct supply network water line additionally has a hydro turbine, on the shaft about which all the pumps are located.

Description

I

The invention relates to a power system and can be used in district heating plants.

The purpose of the invention is to increase the efficiency of the installation and increase the adjustment range of the output power.

The drawing shows the principal scheme of the proposed steam turbine installation. The steam turbine plant contains a turbine 1, to which a network heater i, connected to the heat consumer 3 by main lines 4 and 5, is connected to the forward and reverse mains network, respectively. On the latter, a retaining body is installed6. To the return network water line 5: to the retaining member, the water supply chiller storage tank 9 installed by the water-cooled chiller 8 connected to heating water is connected to it by the pump 11 and the valve 12 to the inlet of the network heater 2. To the outlet, coolant 8 by means of heated feed water by pipeline 13 has been supplied JVH chemical water treatment unit 14 with a tailing pipe 15 for boiler feed (not shown) and 16 for heating network, while the latter is connected to deaerator 17, communication SG conduit 18c mounted therein n pump 19 from storage vessel 9 chilled water. To line 4, the direct supply water is connected by pipeline 20 through a regulating valve 21, a hot water storage tank 22, connected by a pipe 23 with a valve .24 and pump 25 installed on it with a back network water pipeline 5 after the retaining member 6 .. Storage tank 22 is communicated by pipe 26 with a regulating valve 27 installed on it and pump 28 with an additional tank 29 connected to the return network water line 5 before and after the retaining member 6, respectively, by pipelines 30 and 31 with valves 32 33. conduits 7 and 31 are installed Naso 34 and 35 respectively.

201535

 A hydro turbine 36 is mounted on the pipeline connecting the hot water storage tank 22 to the direct water trunk 4 and is located on the same shaft with pumps 11, 35 and 28 placed respectively on the pipelines connecting the cooled water tank 9 and the additional tank 29 s. line 5 reverse network water and

additional tank 29 with a capacity of 22 hot water. Steam turbine installation works as follows. In the network heater 2, the steam of the turbine 1 is heated by network water. The return network water from line 5 through pipeline 7 in the required amount is supplied to the cooler 8, where it heats the raw make-up water and, after cooling, is directed by means of a pump 34 to the storage water reservoir 9. The water in the cooler 8 is heated by water through conduit 13 to the node 14 of the CBW and then through conduit 15 to power the boilers and through conduit 16 to the heat supply network deaerator 17, from where pump 18 is pumped to conduit 18 to the storage tank 9. Subscriber units Consumer 3 heat and through line 4 and pipelines 7, 13, 16 and 18 in all modes during the day constant. During the hours of reduced electrical loads (basic mode), valves 12 and 33 and control valves 21 and 27 are closed, valves 24 and 32 are open. The storage tank 9 is filled with water as a result of supplying it from the deaerator 17 by the pump 19 and from the cooler 8 by the pump 34. The return water from the line 5 enters the storage tank 29. The feed of the heat network is supplied by the hot water stored in the tank 22. peak time, through line 23 by pump 25. Capacity 22 is emptied. The network heater receives the return network water from the consumer 3 minus its flow through pipelines 7 and 30 and the water supplied through pipeline 22. In the limit, the return network water does not flow to the network heater 3 at all. Turbine 1 generates reduced power. In the peak mode, the valves 12 and 33 open, the control valves 21 and 27, the valves 24 and 32 are closed and the pumps 11, 28 and 35 are turned on. The cooled water stored in the tank 9 and the return network water in the tank 29 are fed at the entrance of the preheater 2. The tanks 9 and 29 are emptied. Pipelines 20 and 26 receive direct network water and reverse network water, respectively, and the water flow in them is automatically maintained by hydraulic opening of the regulating valves 21 and 27 so as to ensure the water temperature in the storage tank 22 is somewhat lower than the boiling point of water at atmospheric pressure. (for now). The storage tank 22 is filled. Chilled water supply to the network 5. heater 2 leads to an increase in steam consumption for it from turbine 1 and to an increase in plant capacity. Due to the fact that in the basic mode the reverse network water enters the network heater 2. in a smaller, and in peak mode in a larger amount, the power of the proposed installation in the basic mode is lower, and in the peak mode more than in known installations. At the same time, the flow rates of mains water to main 4 and 5 in all modes, as described, remain constant and equal to those in traditional heat and power plants and basic CHP. Therefore, the energy consumption for pumping water is significantly lower than in a known installation. The heat supply to the consumer becomes independent of the electrical mode of operation of the plant.

Claims (2)

1. A steam turbine installation, comprising a turbine and a network heater with direct and reverse mains water lines and a retaining element installed in the latter, an accumulating chilled network water tank connected at the inlet to the outlet of the water-water cooler, and at the outlet through a pipeline with a pump, to the return main network water after the retaining body, and at least two accumulating tanks of hot network water, the first of which is connected at the entrance to the return mains water line to the retaining body, and which, at the inlet with the help of the pipeline, goes to the direct main water main and at the outlet to the return water main after the retaining organ, characterized in that, in order to increase the economy and increase the regulation range of the generated power, the first accumulating hot network water tank is connected at the outlet pipelines with pumps installed on them to the return main water line after the retaining body and to the inlet of the second accumulating capacity of the hot network water, and the inlet of the water-water cooler in gray s water IS connected to manifold return water to the retaining body. 2. Installation according to claim 1, characterized in that a hydraulic turbine is additionally installed on the pipeline connecting the second storage tank to the main line of direct network water, on the shaft of which all pumps are located. SU.,., 1201535