CN214406017U

CN214406017U - Feed water storage mechanism of marine boiler

Info

Publication number: CN214406017U
Application number: CN202023233391.1U
Authority: CN
Inventors: 周利刚; 梅盛; 高磊
Original assignee: Zhangjiagang Hailu Shazhou Technology Co ltd
Current assignee: Zhangjiagang Hailu Shazhou Technology Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-10-15
Anticipated expiration: 2030-12-29

Abstract

The utility model discloses a feedwater storage mechanism of marine boiler, include: the hot well is provided with a hot well output pipe, the hot well is connected with a first condensate pipe and a second condensate pipe, the second condensate pipe is communicated with the drainage end of the condenser, the water inlet end of the condenser is connected with a condensation input pipe, and the condensation input pipe is connected with a steam supply pipeline; the hot well is internally provided with a steam injection pipe which can inject steam into the hot well, the steam injection pipe is connected with a steam input pipe outside the hot well, the steam input pipe is sequentially provided with a straight-through stop valve, a temperature regulating valve and a first stop valve along the conveying direction of the steam, and the steam input pipe is connected to a steam supply pipe; the hot well is provided with a temperature sensor. The utility model has the advantages that: the water temperature of the water in the hot well can be effectively controlled, so that the oxygen content is reduced, the corrosion of metal equipment of the boiler is reduced, and the service life of the whole boiler is prolonged.

Description

Feed water storage mechanism of marine boiler

Technical Field

The utility model relates to a marine boiler technical field, concretely relates to marine boiler's water supply mechanism.

Background

Due to space constraints, thermal wells are often used as storage tanks for water on ships. The water in the hot well is fed to the boiler. During boiler feed water, it was found that: the oxygen content of the water decreases with increasing temperature and increases as soon as the temperature of the water decreases. If the oxygen content of the boiler feed water is high, the metal corrosion is accelerated, and the service life of the boiler is shortened. However, the water in the existing water well can not be always kept at a high temperature, so that the oxygen content of the feed water can not be well controlled.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: provided is a feed water storage mechanism for a marine boiler, wherein the water temperature can be stably controlled, and the oxygen content of feed water can be stably controlled.

In order to achieve the above object, the utility model adopts the following technical scheme: feed water storage mechanism for a marine boiler, comprising: the hot well is provided with a hot well output pipe, the hot well is connected with a first condensate pipe and a second condensate pipe, the second condensate pipe is communicated with the drainage end of the condenser, the water inlet end of the condenser is connected with a condensation input pipe, and the condensation input pipe is connected with a steam supply pipeline; the hot well is internally provided with a steam injection pipe which can inject steam into the hot well, the steam injection pipe is connected with a steam input pipe outside the hot well, the steam input pipe is sequentially provided with a straight-through stop valve, a temperature regulating valve and a first stop valve along the conveying direction of the steam, and the steam input pipe is connected to a steam supply pipe; the hot well is provided with a temperature sensor.

Further, in the feed water storage mechanism for a marine boiler described above, a filter is provided in the steam input pipe between the temperature control valve and the straight-through shutoff valve.

Further, in the feed water storage mechanism of a marine boiler, the steam injection pipe may include: the steam injection pipe comprises a pipe body, wherein a plurality of steam injection ports are arranged on the pipe body at intervals.

Further, in the feed water storage mechanism for a marine boiler, the condensing input pipe is provided with a pressure relief valve, and the condensing input pipe on both sides of the relief valve is provided with a second stop valve and a third stop valve.

Further, in the feed water storage mechanism for a marine boiler, a condensation bypass pipe is provided on the condensation input pipe, both ends of the condensation bypass pipe are connected in parallel to the condensation input pipe at the end portions of the second stop valve and the third stop valve, and a fourth stop valve is provided on the condensation bypass pipe.

The utility model has the advantages that: and monitoring the water temperature in the hot well in real time, and once the water temperature is lower than the set temperature, the steam injection pipe can inject steam into the hot well, so that the water in the hot well is heated, and the water temperature in the hot well is ensured to be always kept at the set temperature. Therefore, the oxygen content of the water in the hot well can be effectively controlled in a lower range, so that the corrosion of metal equipment of the boiler is reduced, and the service life of the whole boiler is prolonged.

Drawings

Fig. 1 is a schematic view of the working principle of the feed water storage mechanism of the marine boiler according to the present invention.

Fig. 2 is a schematic view of a connection structure of the steam injection pipe and the steam input pipe in fig. 1.

Detailed Description

The invention will be described in further detail with reference to the drawings and preferred embodiments.

As shown in fig. 1 and 2, the feed water storage mechanism of the marine boiler includes: the hot well 1 is provided with a hot well output pipe 12 on the hot well 1, is connected with first condensate pipe 2 and second condensate pipe 8 on the hot well 1, second condensate pipe 8 communicate with the drainage end of condenser 3, the end of intaking of condenser 3 is connected with condensation input tube 4, condensation input tube 4 be connected with steam supply pipeline 5. The hot well 1 is provided with a steam injection pipe 6 which can inject steam into the hot well 1, the steam injection pipe 6 is connected with a steam input pipe 7 outside the hot well 1, and the structure of the steam injection pipe 6 comprises: the steam jet nozzle comprises a pipe body, wherein a plurality of steam jet nozzles 61 are arranged on the pipe body at intervals.

The steam input pipe 7 is sequentially provided with a straight-through stop valve 71, a temperature regulating valve 72 and a first stop valve 73 along the conveying direction of the steam, and the steam input pipe 7 between the temperature regulating valve 72 and the straight-through stop valve 71 is provided with a filter 74. The filter 74 is provided to effectively remove impurities from the steam. The steam input pipe 7 is connected to the steam supply pipe 5; the thermal well 1 is provided with a temperature sensor 11.

In this embodiment, the condensation input pipe 4 is provided with a pressure relief valve 41, and the condensation input pipe 4 on both sides of the pressure relief valve 41 is provided with a second stop valve 42 and a third stop valve 43. The condensation input pipe 4 is provided with a condensation bypass pipe 40, two ends of the condensation bypass pipe 40 are connected in parallel with the condensation input pipe 4 at the end parts of the second stop valve 42 and the third stop valve 43, and the condensation bypass pipe 40 is provided with a fourth stop valve 401.

The working principle is as follows: steam generated by the boiler on the vessel is supplied by a steam supply line 5 to steam-using equipment on the vessel. Condensate water produced in the steam using equipment on the vessel is returned to the hot well 1 via a first condensate pipe 2. When the steam using device is suspended, the steam in the steam supply pipeline 5 enters the condenser 3 for cooling through the condensation input pipe 4, the second stop valve 42, the pressure relief valve 41 and the third stop valve 43. The cooling water formed by cooling by the condenser 3 enters the hot well 1.

The water in the thermal well 1 is supplied to the boiler via a thermal well output pipe 12. The temperature sensor 11 monitors the temperature of the water in the thermal well 1 in real time, typically the temperature in the thermal well 1 is controlled at 80 ℃. The temperature sensor 11 feeds back a temperature signal monitored in real time to the PLC controller, and the PLC controller controls the temperature adjusting valve 72 to operate according to the temperature information. Once the temperature detected by the temperature sensor 11 is lower than 80 ℃, the temperature control valve 72 is opened, the steam in the steam supply pipe 5 enters the steam injection pipe 6 through the steam input pipe 7, the steam injection port 61 on the steam injection pipe 6 injects the steam into the hot well 1, so as to heat the water in the hot well 1, and when the temperature detected by the temperature sensor 11 in the hot well 1 reaches 80 ℃, the temperature control valve 72 is closed.

The utility model has the advantages that: the water temperature in the thermal well 1 is monitored in real time, and once the water temperature is lower than the set temperature, the steam injection pipe 6 injects steam into the thermal well 1, so that the water in the thermal well 1 is heated, and the water temperature in the thermal well 1 is ensured to be always kept at the set temperature. Therefore, the oxygen content of the water in the hot well 1 can be effectively controlled in a lower range, so that the corrosion of metal equipment of the boiler is reduced, and the service life of the whole boiler is prolonged.

Claims

1. Feed water storage mechanism for a marine boiler, comprising: the hot well is provided with hot well output tube on the hot well, its characterized in that: the hot well is connected with a first condensate pipe and a second condensate pipe, the second condensate pipe is communicated with the water discharge end of the condenser, the water inlet end of the condenser is connected with a condensation input pipe, and the condensation input pipe is connected with a steam supply pipeline; the hot well is internally provided with a steam injection pipe which can inject steam into the hot well, the steam injection pipe is connected with a steam input pipe outside the hot well, the steam input pipe is sequentially provided with a straight-through stop valve, a temperature regulating valve and a first stop valve along the conveying direction of the steam, and the steam input pipe is connected to a steam supply pipe; the hot well is provided with a temperature sensor.

2. The feed water storage mechanism of a marine boiler according to claim 1, wherein: a filter is arranged on the steam input pipe between the temperature regulating valve and the straight-through stop valve.

3. The feed water storage mechanism of a marine boiler according to claim 2, wherein: the structure of the steam injection pipe includes: the steam injection pipe comprises a pipe body, wherein a plurality of steam injection ports are arranged on the pipe body at intervals.

4. The feed water storage mechanism of a marine boiler according to claim 1, 2 or 3, wherein: the condensation input pipe is provided with a pressure relief valve, and the condensation input pipe on two sides of the relief valve is provided with a second stop valve and a third stop valve.

5. The feed water storage mechanism of a marine boiler according to claim 4, wherein: and a condensation bypass pipe is arranged on the condensation input pipe, two ends of the condensation bypass pipe are connected in parallel on the condensation input pipe at the end parts of the second stop valve and the third stop valve, and a fourth stop valve is arranged on the condensation bypass pipe.