SU1523837A1 - System for preparing additional water - Google Patents

Abstract

The invention relates to a power system, can be used in thermal power plants, mainly equipped with heat and power plants running on natural gas, and aims to increase efficiency by reducing the cost of preparing water and increasing the amount of condensate. During the operation of the system for the preparation of additional water, natural gas combustion products after boiler 5 are fed through gas duct 4 to contact water heater (KV) 1 and partially via bypass line 20 to surface gas-water heater 21, where water of circuit 4 is heated. exceeding the adiabatic saturation temperature, and with elevated moisture content and enthalpy, enter contact capacitor 6, where they are cooled with water circuit 11. Between steps 26 and 27, contact capacitor 16 is fed along the line 20 cooled gases. From the mixture of cooled and humidified gas flows in stage 27 of the contact condenser 6, condensate is released, which, together with the water of circuit 11, is discharged into the sump 7. Excess desalted water is discharged into the storage tank 18, and then the consumer along with the water from the device 16 water. Heat is removed from circuit 11 through a water heat exchanger 9 into pipe 12 to supply water to device 16. 1 sludge.

Description

This invention relates to heat power

geology, in particular, to the system of preparation of additional water, and can be used at thermal power plants, mainly heating plants, running on natural gas.

The aim of the invention is to increase the economy by reducing the cost of preparing the water and increasing the amount of condensate produced.

The drawing shows a diagram of the system for the preparation of additional water.

The system contains a contact water heater 1, equipped with an irrigator 2, included in the water circuit 3 and communicated through the heating coolant to the flue 4 of the boiler 5 and the contact condenser 6, which has a sump 7 and the irrigator 8, connected through a surface water heat exchanger 9 and a circulation pump 10 in water icoHTyp 11. A water heat exchanger 9 is connected to the heated medium by pipeline 12 parallel to the condenser 13 of the turbine (not shown), the heat exchange surface AND (for example, the built-in beam) of which is heated on the sides conduit 15 is connected through device 16 chemical treatment of water (not yokazan) to a consumer conduit 17 which (Erez accumulator tank 18 and a pump 19 Connected tray 7 contact condenser 6.

The gas flue 4 of the boiler 5 is additionally connected to the contact condenser 6 by the bypass line 20, equipped with a surface gas heater 21, connected via a heated medium in the water circuit 3 of the contact water heater 1, and the bypass line 20 is connected to the contact condenser 6 above zone 22 connected5

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fII to it by the flue 4 contact water heater 1.

The circuit 3 of the contact 1 of the water heater 1 is connected by a jumper 23 to the pipeline 12 and has a purge pipe 24 and a circulation pump 25. Contact capacitor 6 has steps 26 and 27.

The system works as follows.

The products of natural gas combustion after the boiler 5 are fed through 1 flange 4 partially to the contact water heater 1 and partially to the bypass line 20 to the surface gas-emitting heater 21, where they heat the water of circuit 3 above the adiabatic temperature I o saturation of the products. In contact water heater 1, in contact with water having a temperature higher than the adiabatic temperature; the combustion products also acquire a temperature higher than their adiabatic temperature, with a corresponding increase in moisture content and enthalpy. They are then fed through a duct 4 to a first stage 26 of a contact condenser 6, where they are partially cooled. After it, the combustion products are mixed with the cooled combustion products coming from the line 20 after the heater 21 and are fed to the second stage 27 of the contact condenser 6, where they are cooled below the dew point temperature due to contact with the water in the heat exchanger 9. In this case, a large part of the moisture contained in the humidified combustion products is condensed. This condensate (demineralized water) along with the water in circuit 11 is collected in the sump 7 of the contact capacitor 6. Excess demineralized water through the iriver pipe iioc cyiiae.T into the storage tank 18, from where) jacocoM 19 is mixed with the water that has passed the installation of 16 dl chemical water treatment.

The remaining additional water for the heat network is heated in the heat exchanger 9 and in the heat exchange surface 14 of the condenser 13 of the turbine and sent to the device 16 for chemical purification of water.

The surface of the nozzle of step 26 is selected from the condition of cooling the combustion products therein to an enthalpy value that is approximately equal to the enthalpy of the combustion products coming through line 20.

Installing a gaseous surface heater 21 makes it possible to increase the moisture content of the combustion products before the contact condenser 6 with a corresponding increase in the quality of condensate (demineralized water), which, after degassing, is used as additional water. This reduces the required performance of the device 16 for chemical water purification.

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Claims (1)

Invention Formula The system for preparing additional water, containing a contact water heater, equipped with an irrigator included in the water circuit, and communicated via the heating coolant, respectively, to the boiler flue duct and contact condenser having a sump and irrigator, are connected to the water circuit through the surface water heat exchanger connected by the heated medium parallel to the turbine condenser connected by the heated side through a device for chemical purification of water to the consumer of additional water by means of pipes of the gadfly communicated with the contact condenser pallet, about tons of hours (with the fact that, in order to increase efficiency by reducing the cost of preparing the water and increasing the amount of condensate produced, the gas flue of the boiler is additionally connected to the contact condenser a bypass line equipped with a surface heater connected via a heated medium in the water circuit of the contact water heater, with the OIpasal line connected to the contact condenser above the contact water heater.