SU1539341A1 - Central heating plant - Google Patents

Abstract

The invention allows to increase the efficiency of the heating plant and to provide bacteriological disinfection of the make-up water of the heat network. In the lower and upper network heaters 5 and 6 there are tube bundles 12 and 13 for heating the make-up water, communicated with a deaerator (D) 14 of atmospheric overheated water. The evaporator deaerator pipe 15 is in communication with the steam network 16 of the lower mains heater 5. The installation is equipped with additional regulators 22 and 23 installed on the evaporator pipeline 15 and the bypass line 7 and controlled by pressure in D 14 and by the temperature of the network water behind the network pump 18. In heaters 5 and 6, network and feed water is heated, the latter being superheated relative to the saturation pressure in D 14 and fed to it. The secondary vapor and aggressive gases released from the water through the evaporator pipeline 15 through the regulator 22 enters the heater 5, and the make-up water is supplied to the network water 4. In the preheater 6, a constant pressure is maintained, which ensures the stabilization of the temperature of decarbonated water at the inlet to D 14, and the regulator 22 maintains a constant pressure in D 14. The heating of the make-up water in the heaters 5 and 6 increases the production of electricity on heat consumption. 2 hp f-ly, 1 ill.

Description

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The invention relates to the power industry and can be used in heat and steam generation turbine plants of combined heat and power plants with modern heat and power generation turbines with double heat extraction.

The aim of the invention is to increase the economy and ensure bacteriological disinfection of make-up water.

The drawing shows a schematic diagram of the heating plant.

(The installation contains a steam turbine 1, to the lower 2 and upper 3 selections of which are connected in series 5 lower network and upper 6 network heaters (NSP and VSP) connected in line 4 of the network water with line 7 bypassing them via the network architect. In section 8 of the make-up water the built-in bundle 9 of the condenser 10 of the turbine 1, the chemical water cleaning (CVT) 11, the tube bundles 12 and 13 of water heating and the deaerator 14 of atmospheric hot water 14 with the evaporation pipe 15, are connected in series, and the latter is connected to the vapor space 16 of the NSP 5. Pipe bundles 12 and 13 are located You follow the water flow paths in the NSP 5 and VSP B. Tract 8 of the make-up water after deaerator 14 through the signature pump 17 is connected to the network 4 path after VSP 6. The network pump 18 is installed in the network water path 8, the peak hot-water boiler 19, heat consumers 20 and booster pump 21. On the evaporator pipeline 15 and on the bypass line 7, additional regulators 22 and 23 are installed, controlled by the pressure in the deaerator 14 and the temperature of the supply water behind the network pump 18, respectively. After HVO 11 pump 24 is installed.

Thermal installation works as follows.

A part of the steam that has been exhausted in the turbine 1 enters the lower 2 and upper 3 regulated heat extraction flows, and mainly the ventilating vapor flow enters the condenser 10. Cheese feed water, possibly containing pathogenic bacteria, is heated in the tube bundle 9 of the condenser 10 and is fed to the HVO 11, where it is softened and decarbonized. Pump 24 decarbonated

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the chemically treated feedwater is pumped sequentially through tube bundles 12 and 13 of NSP 5 and VSP 6 and with a temperature of about 105 ° C enters the deaerator 14 of atmospheric hot water. The temperature of the make-up water behind the VSP 6 is maintained at the required level by means of a regulator (not shown) of the pressure of the upper thermal extraction 3. In the deaerator 14 connected by a vapor pipe 15 to the vapor space 16 of the NSP 5 by means of a regulator 22 controlled by pressure in deaerator 14, maintains a saturation pressure in the order of 0.12 MPa. Overheated relative to the saturation pressure in the deaerator 14 at 4-5 ° C, the make-up water is introduced into the deaerator 14 through nozzles or nozzles (not shown) and boils. The vapor released from the water of the secondary and the corrosive gases through the vapor pipeline 15 through the regulator 22 enters the NSP 5, where the vapor condenses and the non-condensable gases are sucked off with an ejector (not shown) and then vented to the atmosphere.

The return water of the heating network, returned from the consumer 20, is pumped by the booster pump 21 through the NSP 5 and VSP 6, is heated in them due to the heat of the steam from the extraction pumps 2 and 3 of the turbine 1. Before the network pump 18, the make-up water pump 4 is fed into the network 4 water from the deaerator 14. The network pump 18 supplies the network water directly to the consumer 20 or through PVC 19.

Maintaining the desired temperature by the schedule of the heating network of the network water temperature is carried out using the regulator 23 and changing the load of the PVC 19. The regulator 23 is controlled by the temperature of the network water behind the network pump 18.

In all modes, a constant pressure (for example, 0..13 MPa) is maintained by the pressure regulator of the upper thermal extraction 3 of the turbine 1 in VSP 6, which ensures the stabilization of the temperature of the decarbonated water at the outlet of the tube bundle 13 at 107 C.

The regulator 22 maintains a constant pressure in the deaerator 14 corresponding to a saturation temperature of 104 C. In combination with the exposure of deaerated water in the deaerator 14, this contributes to the qualitative degassing of the make-up water and its bacteriological disinfection.

Heated make-up water in the NSP 5 and VSP 6 increases the production of electricity for heat consumption.

Claims (3)

1. Heating installation, containing a steam turbine, to the lower and upper selections of steam where the lower and upper network heaters are connected in series in the network water path, make-up water path, which includes a built-in turbine condenser beam, water purification tube and deaerator, peak water boiler and regulators, about tl and h and five Since, in order to increase the efficiency and provide bacteriological disinfection of the make-up water, the tube bundles of heating the make-up water are located successively in the lower and upper network heaters, the deaerator is made of atmospheric type on superheated water and equipped with a steam pipe, communicated with the steam space of the lower mains heater, while the mains heaters are equipped with a bypass line through the mains water .. j 2. Installation according to claim 1, about the fact that she tl and h a- supplied additional regulatory authority on the pipe installed on the steam. 3. Installation according to claims 1 and 2, so that it is equipped with an additional regulator installed on the bypass line.