SU909413A1 - Boiler unit - Google Patents

Description

(54) BOILER INSTALLATION

I

The invention relates to power engineering and can be used in haatified boiler houses to exclude chemical purification of water.

A boiler installation is known that contains a boiler equipped with contact heaters and economizers, connected in parallel with its supply and outlet lines to the heating paths of the heat network and surface heat exchanger, the latter’s heated path is connected to the contact heater, and the contact economizer has a condensate collector connected to the supply line of the boiler ij.

The disadvantage of the boiler plant is its reduced efficiency due to the increased amount of heat to heat the air. This is due to the fact that the amount of condensate produced in the contact economizer for make-up, is eaten by the moisture content of the blast air, which, in turn, depends on the temperature of the heated water.

at the entrance to the air heater. This temperature is determined by the consumption of a high-potential heat-transfer fluid through a superheated superheater.

In order to reliably provide the installation with condensate in an amount necessary to replenish the heat supply system, the flow of high-grade heat carrier 10 should be taken from the condition of maximum condensate demand. In the event of a reduction in water leaks from the heat supply system, there is an overrun of the high-grade heat carrier 15.

The purpose of the invention is to increase the aconomicity of the boiler plant by reducing the amount of heat to heat the air.

M

Claims (2)

This goal is achieved by the fact that the heating path of the surface heat exchanger is equipped with a flow regulator associated with an additional level sensor installed in the condenser collector of a contact economizer. The drawing shows schematically the boiler plant. The boiler plant contains a boiler 3 equipped with contact air ejector 1 and economizer 2, connected in parallel with its supply and output lines, 4 and 5, respectively, to the heating paths of the heating network 6 and the surface heat exchanger 7. The heating path of the heat exchanger 7 is connected to the contact air supply heater 1, and contact economizer 2 has a condensate collector 8, connected to supply line 4 of boiler 3, the heating path of the surface heat exchanger is equipped with a flow regulator 9 connected to the sensor 1О Equipped in 8 condensates of contact economizer 2. The installation also has surface heat exchangers 11 and 12 connected in parallel with their heating paths to economizer 2, and heated medium paths to air heater I. Air heater 1 is also connected to water mains 13 and through heat exchanger 12 - to the water supply system (not shown). The condensate condenser 8 is connected to the eco-omnayer 2 via the deck 14, and to the supply line 4 of the boiler 3 through the deaerator 15. The boiler plant works as follows. Combustion products after the boiler 3 enter the contact economizer 2, where water is heated. The heated water 1 passes through the heat exchangers 11 and 12, is cooled and returned to the contact economizer 2. The water cooled in the air heater I is pumped sequentially through the heat exchanger 11 and 7, where it is heated to the required temperature and returned to the air heater 1. Water from the water supply system 13 enters the system hot water supply, supplies it to the air heater 1. In this case, part of the tap water is spent on compensation in the contact air heater, and with the remaining part, th water removed from the air heater I salt. Next, the water of the water supply system is supplied to the heat exchanger 12 for heating. Saturated air after the counter air heater is supplied to the boiler 3, from which the combustion products with the water vapor contained in them are sent to the contract economizer 2. Condensate (demineralized water) released from 15 products of combustion after being cooled deeply in contact economizer 2 is removed from the latter through a decarbonator 14 to condensate collector 8, from where the condensate is fed to the deaerator 15 and then to the heating network’s heating circuit 6. With a decrease in water leakage in the heat network 6, the required condensate consumption decreases, which leads to an increase in the water level in the condensate collector 8. From the water level sensor 1O, a corresponding signal is supplied to the flow controller 9. This reduces the consumption of high-grade heat transfer fluid through the heat exchanger 7, which reduces the temperature of the heated water at the inlet to the contact air heater I and the temperature, and, accordingly, the moisture content of the saturated blast air. As a result, the moisture content of the combustion products at the outlet to the contact economizer 2 n decreases, the amount of condensate that accumulates from them decreases. With an increase in water leaks in the heat network 6, the consumption of high-temperature heat transfer agent using sensor U and controller 9 also increases, which ultimately leads to an increase in the amount of excreta in the condensate combustion products. Thus, the amount of heat for air heating is reduced by maximizing the flow of high-grade heat transfer fluid while ensuring the boiler plant is reliably supplied with the required amount of condensate that allows operation without chemical water purification, which increases the economics of the boiler plant. Formula of the Invention A boiler plant comprising a boiler equipped with contact heaters and economizers, connected in parallel by its supply and outlet lines to the heat paths of the heat network and the surface heat exchanger, the heated path of the latter