RU119858U1 - BUILDING HEAT SUPPLY SYSTEM - Google Patents

Abstract

1. The heat supply system of the building, containing the supply pipe of the heat carrier with a steam-water injector installed on it, the return pipe, the pipelines for supplying hot water to the water-folding and heating devices and removing the circulating water from them, the storage tank, control valves and sensors, characterized in that the tank - the accumulator is installed on the return pipeline, the pipelines for diverting the circulating water from the tap and heating devices are connected through the return pipeline with the storage tank, to which the cold water make-up pipeline is also connected and from which the pipeline is taken to the steam-water injector. ! 2. The heat supply system of the building according to claim 1, characterized in that the pipeline for withdrawing circulating water from the water-folding devices is connected to the return pipeline through a jumper with a valve installed after the pipeline for withdrawing water from heating devices. ! 3. The building heat supply system according to claim 1, characterized in that a booster pump is installed on the supply pipeline after the steam-water injector for servicing high-rise buildings and regulating the flow rate of the heat carrier in consumer devices.

Description

The solution relates to the field of power engineering - the operation of single-pipe external heating networks with a “steam” energy carrier for the needs of heat supply and internal (in the building) four-pipe water systems (supply and return pipelines) for heating and hot water supply.

A known heat supply system (RF patent No. 2044223, F24D 1/00, publ. 09/20/1995, scheme a), containing a supply steam line, steam lines of subscriber inputs, a return pipe, a hot water supply system (DHW) with water fittings, a water heating system, a heat exchange regenerative apparatus, control valve and sensor.

At the same time, the hot water supply system is deadlock, which leads to cooling of hot water in the supply pipelines with a long absence of water intake.

The building’s heat supply system was adopted as a prototype (see Heating and Heating Networks / E.Ya. Sokolov - M .: MEI Publishing House, 2006, p. 109, Fig. 3.16-a).

The system contains a coolant supply pipe (steam) with two steam-water injectors installed on it according to a mixed (parallel-serial) circuit (parallel in steam and serial in water in order to organize two-stage heating and increase the water pressure), a return pipe of the water heating system, supply pipelines coolant (water) to water taps and heaters, expansion vessel (storage tank), control valves and sensors.

In this case, the hot water supply system is also a dead end, which leads to cooling of hot water in the supply pipelines with a long absence of drawdown.

In addition, there is overheating of the water of the hot water system in an unheated period when there is no cooling in the radiators; the steam-water injector has a relatively small pressure of the supply water (not more than 10 ... 12 m water. Art.), which does not allow for the heat supply of multi-storey buildings; the absence of a cold water make-up pipeline does not allow precise control of the temperature of the coolant in the heating system. These shortcomings are eliminated by the proposed solution.

The problem of increasing the efficiency of the heat supply system and more fully meeting operational requirements from the point of view of sanitary standards is being solved.

The technical result is an increase in the efficiency of the heat supply system by reducing the loss of thermal energy by eliminating the cooling of hot water in the DHW supply pipelines with a long absence of water intake and observing the required water temperature values in the heating devices in order to prevent overflow of the premises. In addition, when the heating is turned off during the summer period, sanitary requirements for hot water temperature (55 ... 75 ° C) are observed, and there is also the possibility of servicing high-rise buildings.

This technical result is achieved in that in a building heat supply system containing a heat carrier supply pipe with a steam-water injector installed thereon, a return pipe, hot water supply pipes to and out of the water draw-off and heating devices, a storage tank, control valves and sensors , the storage tank is installed on the return pipe, the drainage pipelines from water taps and heating devices are connected through the return pipe to the storage tank ohm, to which is also connected with a pipeline feeding cold water and from which the diverted steam-water line to the injector; the circulation water drainage pipe from the water taps is connected to the return pipe through a jumper with a valve installed after the water discharge pipe from the heating devices; after the steam-water injector, a booster pump is installed on the supply pipe for servicing high-rise buildings and regulating the flow of coolant in consumer devices.

At any flow rate in the water taps, the pressure and temperature of the hot water consumers remain constant, satisfying sanitary requirements, and the flow rate and water temperature of the heating devices provide the necessary air temperature of the building premises, thanks to the appropriate sensors and regulators, as a result of which the heat losses of the hot water and heating systems operational requirements are more fully met.

The proposed heating system of the building is shown in the drawing. It includes a supply pipe 1 of a coolant (steam) with a steam-water injector 2 installed on it, a return pipe 3, pipelines 4, 5 for supplying hot water to water taps 6 and heating devices 7 and pipelines 8, 9 for discharging circulating water from them, and a storage tank 10 , a temperature monitoring sensor 11 in the supply lines 4 and 5, a pressure monitoring sensor 12 in the supply lines 4 and 5, a sensor 13 supplying a corresponding signal to the on-off regulator 14 for supplying cold water to feed the storage tank 10.

On the supply pipe 1 in front of the injector 2, a regulator 15 for the flow of coolant (steam) is installed. On the pipelines 4, 5, 8, 9, valves 16 are installed for hydraulic regulation of the seasonal adjustment and maintainability of the system.

The storage tank 10 is installed on the return pipe 3, it is connected to it: a pipe 8 for discharging circulating water from water taps 6, a pipe 9 for discharging water from heating devices 7 (via a return pipe 3) and a pipe 17 for replenishment with cold water. From the storage tank 10, a pipe 18 is led out to a steam-water injector 2.

The piping 8 of the discharge of circulating water from the water taps is connected to the return pipe 3 via a jumper 19 with a valve 16 for the possibility of the functioning of the DHW system when the heating system is turned off (for example, in summer).

On the supply pipe 1 after the steam-water injector 2 and the temperature sensor 11, a booster pump 20 with a drive 21 is installed for servicing high-rise buildings and regulating the flow of coolant in consumer devices.

The proposed heat supply system of the building is as follows.

The heat carrier is steam (from the boiler room or CHP) with a pressure of 0.6 ... 0.8 MPa through the supply pipe 1 enters the steam-water injector 2, where it is mixed with water from the storage tank 10, which is sucked in by the energy of the steam jet. Heated to a temperature of 55 ... 75 ° C (depending on the outdoor temperature) with steam in the injector 2, water (temperature is monitored by a sensor 11, which sends a corresponding signal to the steam flow controller 15) is supplied to the building heat supply system by a boost pump 20 for servicing high-rise buildings and regulation of coolant flow in consumer devices. Hot water is supplied at a pressure of 0.5 ... 0.7 MPa (depending on the height of the building and the required flow rate, determined from the heat load at various outdoor temperatures). Pressure control is carried out by the sensor 12, which feeds the corresponding signal to the actuator 21, which changes the speed of the pump 20.

Hot water is supplied simultaneously to both water taps (taps) 6 of the domestic hot water system and heaters (radiators) 7 of the heating system. At the same time, the DHW circulation return water enters the heating system input during the heating period and, in addition to it, into the storage tank 10 during the summer period (valves 16 on pipelines 5 and 9 are closed, and valve 16 on the jumper 19 is opened).

The water level in the storage tank 10 is maintained within the required limits by means of a sensor 13, which supplies the corresponding signal to the on-off regulator 14 of cold water supply via the pipe 17. When the upper level is reached, the regulator 14 closes, the lower level - opens. Valves 16 carry out hydraulic adjustment of seasonal adjustment and the possibility of maintainability of the system.

When considering a heat supply facility - a 9-storey residential building with a maximum heat load of 1000 kW (720 kW - heating, 280 kW - hot water), a steam-water injector (Fisonik apparatus DN 40) with a steam flow rate of 1.4 t / h, a booster pump will be required K80-50-200 (nominal flow rate 50 m ³ / h, head 50 m water column) with a 15 kW variable-speed drive, a 10 m ³ hot water storage tank (from the condition of a possible drawdown for 8 hours) .

Research confirms the industrial applicability of the system.

Claims (3)

1. The building’s heat supply system, comprising a heat carrier supply pipe with a steam-water injector installed on it, a return pipe, hot water supply pipes to and out of the water distribution and heating devices, a storage tank, control valves and sensors, characterized in that the tank -the accumulator is installed on the return pipe, the pipelines for discharging circulating water from water taps and heating devices are connected through the return pipe to the storage tank, to which The cold water feed line has also been supplied to it and from which the pipeline has been diverted to the steam-water injector. 2. The heat supply system of the building according to claim 1, characterized in that the pipeline for discharging circulating water from water-absorbing devices is connected to the return pipe through a jumper with a valve installed after the pipeline for discharging water from heating devices. 3. The building heat supply system according to claim 1, characterized in that a step-up pump is installed on the supply pipe after the steam-water injector for servicing high-rise buildings and regulating the flow of heat carrier in consumer devices.