RU2452897C2 - Method to make-up heating system with hot water, preventing hydraulic shocks - Google Patents

Abstract

FIELD: power engineering.

SUBSTANCE: method to make-up a heating system, consisting in the fact that water leakages occurring in process of operation of boiler plants and heating systems are replenished not with cold water causing hydraulic shocks, but with hot water from a hot water supply system. This method is realised as follows: an additional manifold is made for hot water supply from a hot water supply system, an operating boiler is shut down, a circulating pump of a heating system is stopped, a circulating pump of a hot water supply system is stopped. Afterwards water supply from a system of heating and a system of hot water supply is cut to areas of welding works, water from isolated areas is drained, the produced manifold is welded to a hot water supply system and to a return manifold of a heating system. Then circulating pumps of a heating system and a hot water supply system are started, a boiler is started-up, a ball valve is opened for hot water supply into a return manifold of a heating system.

EFFECT: prevention of a hydraulic shock with addition of hot water in a heating system.

2 dwg

Description

The invention relates to a device for feeding the heating system with hot water, preventing the occurrence of water hammer.

This result is achieved by the manufacture and installation of a device that uses hot water from the hot water supply system to feed the heating system.

It is impossible to find a heating system in which there would be no leakage of coolant (water), and since the liquid (water) is practically incompressible, even a slight leak causes a pressure drop in the return pipe from which water is supplied to the centrifugal circulation pump, and, consequently, a drop pressure after the pump in a straight pipe and worsens the working conditions of the entire heating system. But that's not all. When examining a large number of boiler houses, it was found that in all of them the heating system is recharged in case of leakage by cold water from the cold water supply system. But with a large leak, which is not uncommon during the operation of our worn-out heating systems, a sharp "throw-in" of cold water in large quantities causes water hammering, which affects both the operation of boiler plants - the wiring and even mechanical damage to sections of the boiler are damaged, as well as in heating appliances (radiators) until cracks and new leaks appear in them.

Heating water leaks are possible in flange connections and valve spindle seals, cage leakage, leakages in welded joints, worn out pipelines, in burnouts of boiler sections clogged by deposits, and in other cases.

The prevention of water hammer during recharge of the heating system is achieved by replenishing by supplying hot water to the return pipe from the hot water supply system.

This produces a double effect:

- prevented water hammer, the effect of which is described above;

- eliminates the additional consumption of gaseous, liquid and solid fuels for heating cold make-up water.

1. The technical field to which the invention relates: power engineering.

2. The level of technology: no analogues are installed.

3. The objective of the invention is to improve the operating conditions of boiler plants and heating systems, reducing the consumption of gaseous, liquid and solid fuels.

In the normal mode, the heating system is fed through the chain: cold water supply line 1 to the boiler room, valve (tap) 2, pressure gauge 3, return pipe 8 of the heating system. Make-up is done in manual mode and is shown in Fig. 1.

After completing installation of a device for recharging the heating system with hot water, the cold water recharge system remains unchanged, since during repairs of boiler plants and heating systems when water is drained from them, the initial filling of boiler plants and heating systems is possible only with cold water.

The technical task of the invention is the development of a device for feeding the heating system with hot water from a hot water system.

The task of developing a device for feeding the heating system with hot water, preventing the occurrence of water hammer, is as follows.

1. A section of the line is made up, consisting of a pipeline 7 with a diameter of 50 mm, a ball valve 6, a check valve "after itself" 5, which allows automatic feeding of the return line when the pressure in it drops below the set gauge 3.

2. Stop the working boiler (s).

3. Stop the circulation pump of the heating system.

4. Stop the circulation pump of the supply line of the hot water system.

5. They block the access of water from the heating system and the hot water supply system to prevent access of water to sections of the return line where welding will be performed.

6. Drain the water from the blocked areas.

7. Welded made on paragraph 1 section of the highway to the hot water supply system 4 and the return pipe of the heating system 8.

8. Start the circulation pumps of the heating system and the hot water system.

9. Open the ball valve 6, check the tightness of the welds.

10. Set the check valve "after yourself" 5 to the required pressure and check its operability, reducing the water pressure in the return line.

11. Kindle the boiler plant in a regular manner.

After installing a device for recharging the heating system with hot water in case of significant leaks, hot water from the hot water supply system through a ball valve 6, the check valve "after itself" 5 enters the return pipe of the heating system 8, and since the temperature difference between the water in the heating system and system hot water supply is insignificant; there are no conditions for the occurrence of water hammer. For ten years of operation of this device, water hammer has never been.

The operation of the hot water make-up device is shown in FIG. 2.

The invention is illustrated by drawings of Fig.1 and Fig.2, in which the numbers indicate:

1 - line feed the heating system with cold water from a cold water supply system;

2 - valve that opens or closes the recharge of the heating system in manual mode;

3 - control pressure gauge on the return pipe of the heating system;

4 - supply line of the hot water supply system;

5 - check valve "after yourself";

6 - ball valve;

7 - pipeline with a diameter of 50 mm;

8 - return pipe of the heating system.

The practical application of this device does not cause difficulties: all preparatory work for installing the device is carried out by regular maintenance personnel in a planned manner during the preparation of the boiler and heating system for the autumn-winter period of operation.

The material costs for installing this invention are negligible.

After installing this device, which prevents the occurrence of water shocks, the heating system is replenished automatically using a "after itself" check valve.

Claims (1)

A method of replenishing the heating system with hot water, preventing the occurrence of water hammer, characterized in that water leaks arising from the operation of boiler plants and heating systems are replenished (fed) not with cold water, which causes water shocks, but with hot water from the hot water supply system, and is carried out by additional line for supplying hot water from the hot water system, stop the working boiler, stop the circulation pump of the heating system, they fill the circulation pump of the hot water supply system, block the access of water from the heating system and the hot water supply system to the places of welding, drain the water from the blocked areas, weld the manufactured pipe to the hot water supply system and to the return pipe of the heating system, start the circulation pumps of the heating system and system hot water supply, light the boiler, open the ball valve for supplying hot water to the return pipe of the heating system.

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