CN2828568Y - Water supply pre-supercharging device for steam boiler - Google Patents

Abstract

The utility model steam boiler pre-supercharging device that feeds water belongs to the boiler plant scope, and this device is satisfied with can effectively improve feed pump suction inlet place pressure on the pipeline between oxygen-eliminating device and the feed pump.Technical solutions of the utility model are: with in booster pump and the supply line that is serially connected with after check-valves is in parallel between oxygen-eliminating device and the boiler feed pump, booster pump, check-valves and feedwater current are in the same way, pressure adjustment relief valve is located at the booster pump outlet afterwards to realize pre-pressurized energy control, after pressure adjustment relief valve, be provided with check-valves, the booster pump flow is greater than boiler feed pump, and overflow water flows back to oxygen-eliminating device through check-valves along overflow returning pipe.Booster pump, pressure adjustment relief valve, check-valves are communicated with by steel structure pipeline and are fixed as one.Constitute the steam boiler pre-supercharging device that feeds water jointly by above-mentioned booster pump, pressure adjustment relief valve, check-valves, steel structure pipeline.This pre-supercharging device that feeds water both can be used for newly constructed boiler, can be used for old feed water system of boiler technological transformation again.

Description

Steam boiler feed water pre-pressurization device

1. Technical Field This utility model relates to a booster device installed on the pipeline from the deaerator to the feed water pump to pre-pressurize the feed water, which belongs to the scope of boiler equipment.

2. Background technology The function of the steam boiler feedwater pump is to pump the high-temperature water that has been deoxygenated in the deaerator into the boiler. In order to ensure the normal operation of the feedwater pump, the overall process layout of the boiler room must meet its theoretical requirements for minimum cavitation The margin is affected by many unfavorable factors such as corrosion, shrinking diameter, and increased water resistance loss inside the pipeline in front of the pump during design, construction, and operation, which often lead to cavitation of the feed water pump and cause failure and outage.

3. Contents of the invention

The task of this utility model is to provide a new type of feed water pre-pressurization device. The device is installed on the pipeline between the deaerator and the feed water pump, which can realize the pre-pressurization of the boiler feed water and effectively improve the feed water pump suction. pressure to ensure that the water pump is working properly. The feed water pre-pressurization device can be used not only for newly-built boilers, which cannot meet the necessary cavitation allowance of feed water pumps due to limited space, but also for technical transformation of old boiler feed water systems.

The utility model is completed in the following manner: the booster pump and the check valve are connected in series in the feed water pipeline between the deaerator and the boiler feed water pump, and the booster pump, the check valve and the feed water flow in the same direction , the pressure regulating and overflow valve is set after the outlet of the booster pump to realize pre-increasing pressure control, and a check valve is arranged after the pressure regulating and overflow valve, the flow rate of the booster pump is greater than that of the boiler feed water pump, and the overflow water passes through the check valve along the overflow The return pipe flows back to the deaerator. The booster pump, the pressure regulating overflow valve and the check valve are connected and fixed as a whole by the steel structure pipeline. The steam boiler feed water pre-pressurization device is composed of the above-mentioned booster pump, pressure regulating overflow valve, check valve and steel structure pipeline.

The utility model has the following advantages:

1. The booster pump can run continuously, regardless of whether the boiler feedwater pump is started or not, it can realize the pre-pressurization of the boiler feedwater, effectively increasing the pressure at the suction port of the feedwater pump.

2. When the booster pump fails and stops running, the check valve connected in parallel with it can be opened as a bypass to meet the boiler feed water demand.

3. It can be used not only for new boilers, which cannot meet the necessary cavitation allowance of feed water pumps due to limited space, but also for technical transformation of old boiler water supply systems.

4. Description of drawings This drawing is a schematic diagram, and the valves in the pipeline are omitted.

5. Specific implementation

The invention will be described in further detail below in conjunction with the accompanying drawings:

Connect the booster pump [1] and the check valve [3] in parallel and connect them in series to the water supply pipeline [6] between the deaerator and the boiler feed water pump. The booster pump [1], the check valve [3] In the same direction as the feed water flow, the pressure regulating overflow valve [2] is set after the outlet of the booster pump to realize pre-increasing pressure control, and a check valve [4] is installed after the pressure regulating overflow valve [2], and the booster pump The flow rate is greater than that of the boiler feed water pump, and the overflow water flows back to the deaerator through the check valve [4] along the overflow return pipe [7]. The booster pump [1], the pressure regulating overflow valve [2] and the check valve [3] [4] are connected and fixed as a whole by the steel pipeline [5]. The above-mentioned booster pump [1], pressure regulating and overflow valve [2], check valve [3] [4], and steel pipe [5] jointly constitute a steam boiler feed water pre-pressurization device.

Claims (3)

1. A steam boiler feed water pre-pressurization device composed of a booster pump [1], a pressure regulating overflow valve [2], a check valve [3] [4], and a steel pipe [5], which is characterized by The booster pump [1] is connected in parallel with the check valve [3], and the pressure regulating overflow valve [2] is arranged after the outlet of the booster pump [1]. 2. The steam boiler feed water pre-pressurization device according to claim 1, characterized in that a check valve [4] is installed after the pressure regulating overflow valve [2]. 3. The steam boiler feed water pre-pressurization device according to claim 1, characterized in that the booster pump [1], the pressure regulating overflow valve [2], and the check valve [3] [4] are composed of steel pipes [ 5] connected and fixed as one.