RU1822481C - Low-potential system of steam heating - Google Patents

Abstract

SUMMARY OF THE INVENTION: The ejector is water-jet and has inputs connected to the pump outlet and the end of the condensate line. exit - to the top of the condenser tank. The steam separator and pressure reducing valve are sequentially placed on the steam line in front of the heating devices. The inlet pump is connected to the bottom of the condensate tank. Valves are installed on the steam line and condensate line, respectively, in front of the steam separator and the water-jet ejector. 1 C.p. f-ls, 2 ill.

Description

The invention relates to energy, and in particular to district heating systems.

An object of the invention is to increase the reliability and safety of a heating system.

In FIG. 1 shows a diagram of the proposed low-grade steam heating system; Fig. 2 is an embodiment of a system with two circulation circuits.

The heating system contains a steam line 1, heating devices 2, a condensate line 3, an ejector 4, a steam separator 5, a pressure reducing valve 6, a circulation pump 7, a condensate tank 8 and valves 9, 10, 11. The ejector 4 is water-jet and the inputs are connected to the pump outlet 7 and the end of the condensate line 3, and the outlet to the upper part of the condensate tank 8. The steam separator 5 and the pressure reducing valve 6 are sequentially placed on the steam line 1 in front of the heating devices 2. The pump inlet is connected to the bottom of the condensate tank 8. Valve 9 It was installed not on the condensate line E in front of the water-jet ejector 4. Valve 10 is installed on the steam line 1 in front of the steam separator 5. The second circulation circuit (Fig. 2) contains a water tank 12, a second water-jet ejector 13, a second circulation pump 14, a separation vessel 15 valve 16. The lower part of the water tank 12 is connected to the condensate line 3 and the inlet of the main water-jet ejector

4, and the upper part - to the inlet of the second water-jet ejector 13. The second circulation circuit pump 14 is connected to the lower part of the separation vessel 15 by the inlet. By the output - to the input of the second water-jet ejector 13, the output of the latter is connected to the upper part of the separation vessel 15. Condensate the tank 8 is connected by a rotameter 17 with a warm box of the boiler installation. The condensate tank 8 (figure 1) is also equipped with a valve 11.

A low-potential steam heating system operates as follows. Steam from the boiler passes through a separator

5, where moisture is separated, and into the heating system v

k

about

N K Ј

and

Gw

dry saturated steam passes. Its temperature and pressure are monitored by pressure gauges, manometers, vacuum gauges and thermometers. Passage through the pressure reducing valve b steam is throttled to the required value (p - 10 + 50 kPa), which corresponds to a saturation temperature of 45-80 ° C. If steam is not separated. then erosion of the steam line 1 is possible, since under vacuum the steam velocity increases to 80 + 100 m / s. Steam is supplied through the steam line 1 to the heaters 2. In the heaters 2, the steam condenses. The condensate through the condensate pipe 3 is sucked off by a water-jet ejector 4, which is connected by inputs to the outlet of the pump 7 and the end of the condensate pipe 3, and by the output to the upper part of the condensate tank 8. From the condensate tank 8, the condensate is directed through the flowmeter 17 to the warm box of the boiler plant. A sharp steam separator is sent there. Air entering the tank 8 along with condensate is vented through valve 11.

Claims (2)

In the second embodiment, the mixture of condensate and air from the heating system enters the separation vessel 15, where the air is separated from the condensate and removed by the ejector 13. The distillate is discharged by the ejector 4. The flow rate of steam and condensate, as well as the temperature of the steam in the system are controlled by valves 10 and 16. Claims 1. A low-grade steam heating system comprising a steam line, heating devices, a condensate conduit and an ejector, characterized in that, in order to improve reliability and safety, the system The ma additionally contains a steam separator, a pressure reducing valve, a circulation pump, a condensate tank and valves, while the ejector is water-jet and the inputs are connected to the pump outlet and the end of the condensate pipe, and the output to the top of the condensate tank, the steam separator and pressure reducing valve are sequentially placed on steam line in front of heaters, pump inlet connected to bottom part of the condensate tank, and the valves are installed on the steam line and condensate line, respectively, in front of the steam separator and the water-jet ejector. 2. The system according to claim 1, characterized in that it comprises a second circulation circuit with a water tank included in it, a second water-jet ejector, a second circulation pump, and a separation vessel, while the lower part of the water tank is connected to the condensate line and the inlet of the main water-jet ejector, and the upper part is connected to the inlet of the second water-jet ejector, the second the circulation pump is connected inlet to the lower part of the separation vessel, output - to the inlet of the second water-jet ejector, the output of the latter is connected to the upper part of the separation vessel and through him - with the atmosphere. //, 1 M i i tWm iwm "I couple condensate Phi & 1 H V  Joint venture T7T . l | H. Tf tj  rj .r.V.ri Cj l: 4) SG  Z c N1 cv ZTAG KIj - / - h / "Q -kd