CN215486784U

CN215486784U - Sealing and cooling system of water feeding pump

Info

Publication number: CN215486784U
Application number: CN202121341211.3U
Authority: CN
Inventors: 尹玉英
Original assignee: Nanjing Iron and Steel Co Ltd
Current assignee: Nanjing Iron and Steel Co Ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-01-11
Anticipated expiration: 2031-06-16

Abstract

The utility model discloses a sealing and cooling system for a water feeding pump, which is characterized in that two water inlet pipes are divided from a demineralized water pipe, demineralized water is respectively supplied to the sealing and the mechanical seal of the water feeding pump, and industrial water is completely replaced by the demineralized water, so that the water quality of cooling water for the mechanical seal is ensured, the abrasion and the corrosion of the mechanical seal caused by the water quality problem are reduced, and the working condition of the water feeding pump is improved. Meanwhile, the sealed water return pipe and the machine-sealed cooling water return pipe are used for concentrating the demineralized water to the water return main pipe and sending the demineralized water into the water collecting tank for recycling, and smoothness of the return water is guaranteed through two-way recycling, so that the demineralized water is prevented from being discharged and lost, the recycling of the demineralized water is promoted, and the waste of resources is reduced.

Description

Sealing and cooling system of water feeding pump

Technical Field

The utility model relates to a feed pump of a power plant, in particular to a seal cooling system of the feed pump.

Background

The power plant of steel enterprise is auxiliary production unit, and the field is that the demineralized water system for the water pump is sealed generally can not consider recycle when the design, or some equipment are though considering retrieving, but the recycled water mode is generally simply connected to before the water pump import, and the pressure loss reason leads to the return water not smooth, can only directly discharge and cause great energy loss finally.

Meanwhile, industrial water is adopted as the machine seal flushing cooling water of the on-site water supply pump, and the water quality of the industrial water of each steel plant is uneven, so that the machine seal is frequently damaged by abrasion, corrosion and the like, the water supply pump is frequently leaked, the operation working condition is poor, the machine seal flushing cooling water has to be frequently stopped and maintained, and spare part consumption and maintenance cost are generated.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome the defects of the prior art, the utility model provides a water feed pump sealing and cooling system which solves the problem of recycling of sealing demineralized water of a water feed pump and improves the operation condition of the water feed pump.

The technical scheme is as follows: the utility model relates to a water feed pump sealing cooling system, which comprises a desalting water pipe, a sealing water inlet pipe, a machine seal cooling water inlet pipe, a sealing water return pipe, a machine seal cooling water return pipe, a water return header pipe and a water collecting tank, wherein the desalting water pipe is connected with the sealing water inlet pipe; the sealing water inlet pipe and the machine seal cooling water inlet pipe are respectively led out from the demineralized water pipe and are respectively connected to a sealing water inlet and a machine seal cooling water inlet of a water feeding pump; the sealed water return pipe and the machine seal cooling water return pipe are respectively led out from a sealed water outlet and a machine seal cooling water outlet of a water feed pump and are connected to the water return main pipe; the return water main pipe is connected to the water collecting tank.

Has the advantages that: compared with the prior art, the system divides two water inlet pipes from the demineralized water pipe, supplies demineralized water to the seal and the mechanical seal of the water feeding pump respectively, and completely replaces industrial water through the demineralized water, so that the water quality of the mechanical seal cooling water is guaranteed, the mechanical seal abrasion and corrosion caused by the water quality problem are reduced, and the working condition of the water feeding pump is improved. Meanwhile, the sealed water return pipe and the machine-sealed cooling water return pipe are used for concentrating the demineralized water to the water return main pipe and sending the demineralized water into the water collecting tank for recycling, and smoothness of the return water is guaranteed through two-way recycling, so that the demineralized water is prevented from being discharged and lost, the recycling of the demineralized water is promoted, and the waste of resources is reduced.

Drawings

FIG. 1 is a schematic diagram of a feed pump seal cooling system.

Detailed Description

The sealing and cooling system of the water feeding pump provided by the embodiment is a modification made on the basis of original equipment of a power plant of a steel enterprise public and auxiliary department of an inventor.

As shown in fig. 1, the specific modification is to lead out two paths from a demineralized water pipe 1, wherein one path is a sealed water inlet pipe 2, and the other path is a machine-sealed cooling water inlet pipe 3 which are respectively connected to a sealed water inlet and a machine-sealed cooling water inlet of a water feed pump 100. Of course, the actual modification is to provide two paths at two ends of the feed water pump 100, and the present invention is only described in a general way for convenience of description. Meanwhile, the original industrial water pipe of the water supply pump 100 mechanical seal cooling water is dismantled, and demineralized water is completely used for replacing industrial water. Because the quality of the demineralized water is stable and far better than that of industrial water, the operation condition of the feed pump is obviously improved. Meanwhile, a sealed water return pipe 4 and a machine-sealed cooling water return pipe 5 are respectively arranged at a sealed water outlet and a machine-sealed cooling water outlet of the water feed pump 100 and are connected to a water return main pipe 6.

Because the demineralized water is split into two paths which are respectively used for sealing water and machine seal cooling water, the recovery is correspondingly two paths, and the problem of unsmooth backwater is naturally eliminated. When reforming transform, on the one hand will originally connect to the old recovery pipeline before the water-feeding pump import and demolish, on the other hand can also install flow control valve additional for new pipeline, and the demineralized water flow in each way of further artificial control guarantees sealed, refrigerated effect, promotes the smoothness nature of retrieving.

In the modification project of the embodiment, the demineralized water of the water return main pipe 6 has two directions: firstly, set up header tank 7, the demineralized water that flows into return water house steward 6 inserts header tank 7 and concentrates. Then, the desalted water is pumped into an outlet main pipe 9 of the low-pressure heater through a liquid level controller 71 arranged in the water collecting tank 7 and two parallel micro pipeline booster pumps 8 which are arranged at the outlet of the water collecting tank 7 and are used and prepared one by one. Specifically, the liquid level controller 71 is electrically connected with the micro pipeline booster pump 8, and when the demineralized water in the water collecting tank reaches the limit liquid level, the micro pipeline booster pump 8 is automatically controlled to work, and the demineralized water is pumped into the outlet main pipe 9 of the low-pressure heater. Secondly, in order to avoid the failure of subsequent equipment such as the water collecting tank 7 and the like, an accident drain valve 10 is also arranged on the water return main pipe 6 and is used for temporary drainage under special working conditions.

At present, all feed pumps of a power plant of the department of public and auxiliary utilities complete the transformation, and in the use of nearly half a year, demineralized water is almost all recovered, the condition that accidents need to be discharged outwards rarely occurs, the running working condition of the feed pumps is improved, the leakage frequency is also obviously reduced, and most of the demineralized water can reach the fixed repair period.

Claims

1. A water feed pump sealing cooling system is characterized by comprising a desalting water pipe (1), a sealing water inlet pipe (2), a machine seal cooling water inlet pipe (3), a sealing water return pipe (4), a machine seal cooling water return pipe (5), a water return header pipe (6) and a water collecting tank (7); the sealed water inlet pipe (2) and the machine seal cooling water inlet pipe (3) are respectively led out from the desalting water pipe (1) and are respectively connected to a sealed water inlet and a machine seal cooling water inlet of a water feed pump (100); the sealed water return pipe (4) and the machine-sealed cooling water return pipe (5) are respectively led out from a sealed water outlet and a machine-sealed cooling water outlet of the water feed pump (100) and are connected to the water return main pipe (6); the return water main pipe (6) is connected to the water collecting tank (7).

2. The system of claim 1, further comprising a micro-pipe booster pump (8) connected to the outlet of the header tank (7).

3. A feed pump seal cooling system as claimed in claim 2, characterised in that a level controller (71) is provided within the water collection tank (7), the level controller (71) being electrically connected to the micro-pipe booster pump (8).

4. The system as claimed in claim 2, further comprising an outlet header (9) connected to the mini-tube booster pump (8) for pumping demineralized water into the low pressure heater.

5. The system for sealing and cooling a feed water pump according to claim 2, characterized in that two micro-pipeline booster pumps (8) are connected in parallel at the outlet of the water collecting tank (7).

6. A feed pump seal cooling system as claimed in claim 1, further comprising an emergency drain valve (10) connected to the return water manifold (6) for temporary drainage.