SU1553783A1 - Drum boiler - Google Patents

Abstract

The drum boiler can be used in devices operating with shutdowns in a hot reserve. The goal is to increase reliability by reducing the likelihood of water hammer and heat pumps in the evaporating circuit (IR) and economizer. The boiler contains a steam path (T) 4 connected between the drum (B) 1 and a third-party steam source (SIP) with a steam superheater (P) 2 and a valve 3, IR 5 with a drain pipe connected to its lower section 6 sec. a shut-off valve 7, an economizer 8 connected to B 1 with its output 9 and through an overflow pipe 10 inlet 11 sections, and an additional steam line (DP) 12 with a shut-off and control valve 13 connected with its input section with T 4 in the zone between the valve 3 and P 2. The boiler is equipped with a jet. nym pump (H) 14 with a discharge nozzle 15, the suction and discharge nozzles 16 and 17 which are respectively connected to the output portion DP 12, the bypass conduit 10 and drain conduit 6 and check valve 7 to move the discharged medium. After stopping the boiler in reserve, close the valve 3 and the steam from the CIP through T 4, P 2, DP 12 and H 14 together with the water mixed from it from B 1 is sent to IR 5 and from there to B 1. Excess water from B 1 drained. The use of H 14 allows the boiler to be heated with a low probability of heat pumps and water hammer. 1 il.

Description

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a drain pipe 6 connected to its lower section with a shut-off valve 1, an economizer 8 connected to B 1 with its output 9 and through an overflow pipe 10 the input fl sections and an additional steam line- (dp) 12 with a shut-off and control valve 13 connected with its the inlet section with T 4 in the area between the backfiring 3 and P 2. The boiler is equipped with a jet pump (H) 14 with a pressure nozzle 5, a suction and a pressure pipe 16 and 17, which are connected respectively

Responsible to the output section of the DP 12, the bypass pipe 10 and the drain pipe 6 to the shut-off valve 7 along the discharged medium. After stopping the boiler in reserve, close the valve 3 and the steam from the CIP through T 4, P 2, DP 12 and H 14 together with the water mixed from it from B 1 is sent to IR 5 and from there to B 1. Excess water from B 1 merge t The use of H 14 allows the boiler to be heated with a low probability of heat pumps and water hammer. 1 il.

The invention relates to the field of (heat and power engineering) and can be used in devices of drum boilers operating with shutdowns in a hot reserve.

The purpose of the invention is to increase the reliability by reducing the likelihood of water hammer and heat pumps in the economizer and the evaporating circuit.

The drawing shows a drum cell.

one). The drum boiler contains an on-line between drum 1 and a third-party (steam source (not shown in the drawing)) equipped with a steam superheater 2 installed in series along the latter, and steam valve 4 as well as an evaporation circuit 5 with a drain pipe connected in its lower section 6 with a shut-off valve 7, an economizer 8 connected to the drum 1 with its output 9 and through the bypass pipeline 10 inlet sections 11, and an additional steam line 12 to the porn control valve 13 connected by a JCBOHM inlet A steam boiler with steam path 4 in the area between the valve 3 and the superheater 2. The drum boiler is equipped with a jet pump 14 with a pressure nozzle 15, suction and discharge nozzles 16 and 11, which are connected respectively to the outlet section of the additional steam line 12, the bypass pipe 10 and the drainage pipe 6 to shut-off valve 7 along the discharged medium.

The drum boiler is also provided with steam discharge and drain pipelines 18 and 19, as well as stop valves 20-24.

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Drum pot works as follows.

After stopping the boiler, the valve 3 and the valve 23 are closed in the reserve, the valve 24 is opened. As a result of the steam discharge in the circuit 5, the pressure is set lower than in the external steam source. Then open the valve 20-25 and using the shut-off valve 13 set the flow rate of heating steam in the jet pump 14.

The third-party steam is mixed in the jet pump 14 with boiler water flowing into the pipeline 10 through valve 20 and 21, the steam pipe to the mixture under the pressure of the jet pump 14 flows through the evaporating circuit 5 into the drum 1. Excess water periodically or continuously through pipe 19. Before the subsequent start-up of the boiler, the valve 24 is closed and the valve 3 and the valve 23 are opened. The valve 20-25 is closed, the steam path 4 is disconnected from the external steam source. Similarly, preheat the cooled boiler before steam is carried out prior to start-up until the fire is ignited.

The use of a jet pump 14 will allow the drum boiler to be heated, working with shutdowns in a hot reserve with a low probability of heat pumps and water hammer.

Claims (1)

Invention Formula A drum boiler containing a steam superheater and a valve installed between the drum and a third-party steam source, equipped with a steam superheater and a shutter installed in series along the steam line, as well as an evaporating circuit with a drain valve connected in its lower section with a shut-off valve, an economizer connected to the drum with its output and - through the bypass pipeline - inlet sections, and an additional steam line with a shut-off control valve, connected by its inlet section to the steam path in the e between the valve and the superheater, wherein, that, in order to increase reliability by reducing the likelihood of water strikes and heat pumps in the economizer and the evaporating circuit, it is equipped with a jet pump with a pressure nozzle, suction and discharge nozzles, which are connected respectively to the outlet section of the aforementioned additional steam pipe, the bypass pipeline and the drainage the pipeline to the shut-off valve in the flow of the discharged medium.