SU1523831A1 - Boiler unit - Google Patents

Abstract

The invention can be used in boiler installations with drum boilers. The invention makes it possible to increase the reliability and shorten the heating time of the boiler during the withdrawal from the reserve. The drum 1 and the lower manifold 2 are interconnected to form a natural circulation circuit 3. The heater 4 is connected by the heated side through the inlet chamber, the inlet pipe 7 and the pump 12 to the lower manifold 2, and through the outlet chamber to the separator 9 communicated by the bypass line 11 with the drum. The supply pipe is connected through the regulator 13 and the mixer 14 to the bypass line 11. When the heating unit is heated by the heating coolant supplied to the heater, the pump establishes water circulation through the heater, separator and natural circulation circuit, and the temperature of the water supplied to the drum It is regulated by means of a cold water flow regulator in the mixer, on the basis of ensuring an optimal heating rate with the avoidance of dangerous temperature stresses. 1 il.

Description

The invention relates to a power system and can be used in boiler installations with drum boilers,

The aim of the invention is to increase the reliability and shorten the heating time of the boiler during the withdrawal from the reserve.

The drawing shows a schematic diagram of the installation.

The boiler plant contains a drum 1 and a lower collector 2, interconnected to form a natural circulation circuit 3, and heater A connected by a heated side 5 through the inlet chamber 6 to the supply pipe 7, through the outlet chamber B to the separator 9, and the heating one side 10 - to the source of heating coolant (not shown), the separator 9 being connected by a bypass line 11 to the drum 1. The installation also contains a pump 12, a regulator 13 and a mixer 14, the inlet pipe 7 being connected through the regulator 13 and mixing Only 14 to the bypass line 11, and through the pump 12 to the lower manifold 2 of the natural circulation circuit 3. The separator 9 is equipped with shut-off valves 15 and 16, a bypass valve 17 and a steam exhaust line 18.

The installation works as follows.

When the boiler is in reserve, the natural circulation circuit 3, including drum 1, is completely filled with cold water. In order to transfer to hot condition, the pump 12 and the bypass line 11 are connected to the natural circulation circuit 3, the shut-off valves 15 and 16 are opened and the pump 12 is turned on. A heater is fed to the heater 4. The steam generator produced in the heater 4 enters the mixture into the separator 9, the low pressure steam is fed through the line 18 to the consumer, and the water through the mixer 14 is directed to the drum 1.

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Cold p (from pump 12 through regulator P is also supplied to mixer 14 to regulate:) ironing the temperature of water supplied to drum 1 based on ensuring the required heating rate of natural circulation circuit 3 and preventing dangerous / thermal stresses. In this cell, the difference in the temperature of the water in the supply pipe 7 and at the entrance to the drum 1 is maintained no more.

After the water level in the drum 1 decreases, the shut-off valves 15 and .16 close and the bypass valve 17 opens. A closed circulation of the pump 12 is established through the heater 4 and the natural circulation circuit 3 and heating continues until 1, the target vapor pressure will not be established.

The boiler plant allows for fast, controlled heating of the boiler with the exclusion of dangerous temperature stresses.

Claims (1)

Invention Formula The boiler plant, containing a drum and a lower collector, interconnected with the formation of a contour of natural darculation, and a heater connected by the heated side through the inlet chamber to the supply of the pipeline, through the exit chamber to the separator, and the heating side to the source of the heating medium, and the separator is connected by a bypass line to the drum, about the tplpuR1a so that, in order to increase reliability and reduce; When the boiler is removed from the reserve, the boiler additionally contains a pump, a retractor and a mixer, the supply pipe is connected via a regulator and a mixer to the bypass line, and through a pump to the lower collector of the natural circulation circuit. Editor L. Gratilllo Compiled by Y. Nesterov Tehred M. Khodanych Order 7026/39 Circulation 381 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab., A / 3 Proofreader A. Obruchar Subscription