JPH0915381A - Washing method for auxiliary cooling equipment and heat exchanger for the auxiliary cooling equipment - Google Patents

Abstract

PURPOSE: To provide a washing method for an auxiliary cooling equipment and the heat exchanger for the auxiliary cooling equipment which is capable of sufficiently washing non-cooling side of standby heat exchanger without disassembling the heat exchanger. CONSTITUTION: An auxiliary cooling equipment is formed to have a plurality of heat exchangers 2a to 2c arranged in parallel and cooling water pumps 1a and 1b and sea water pumps 20a and 20b combined to the heat exchangers and to be capable of separating the heat exchangers into operating ones and standby ones and operating by switching these heat exchangers. So as to pass the hot water from the outlet of cooling objective components to the cooling side of a standby heat exchanger 2c, a hot water supply path is provided in between the standby heat exchanger and the cooling water outlet of the cooling objective components.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning method for auxiliary equipment cooling equipment and a heat exchanger for auxiliary equipment cooling equipment, and in particular, it comprises a plurality of heat exchangers arranged in parallel. The present invention relates to an auxiliary equipment cooling facility which is divided into a heat exchanger in operation and a heat exchanger in standby and which can be operated by switching these heat exchangers.

[0002]

2. Description of the Related Art This type of auxiliary equipment cooling equipment generally used in the past includes auxiliary equipment cooling equipment for cooling emergency auxiliary equipment and regular auxiliary equipment. FIG. 4 shows the typical auxiliary equipment cooling equipment. This figure shows the normal operating state of the auxiliary equipment cooling equipment that is assumed to operate even in an emergency.

The auxiliary equipment cooling facility has two systems of cooling water pumps, two systems of seawater pumps and three systems of heat exchangers connected in parallel. In normal operation, one system of cooling water pump, One system of seawater pumps and two systems of heat exchangers are operated, and the remaining one system of cooling water pumps, one system of seawater pumps and one system of heat exchangers are on standby as standby systems.

As an example of the normal operating state of FIG. 4, the subscript a
Considering the case where the pump system of No. 2 and the heat exchanger system of suffixes a and b are operated, the cooling sides 3a and 3b of the heat exchangers 2a and 2b are considered.
The cooling water is heated by the cooling water pump 1a, supplied to the cooling sides 3a and 3b of the heat exchangers 2a and 2b, and circulates in the cooling side system.

The cooling water cools the heat generated in each cooling target auxiliary machine 5 in the heat exchangers 2a and 2b. Inlet valves 10a, 10 on the cooling sides 3a, 3b of the heat exchangers 2a, 2b in operation
b, the outlet valves 11a and 11b are fully open. Further, the inlet valve 10c on the cooling side 3c of the heat exchanger 2c in the standby state is fully opened, and the outlet valve 11c is in the fully closed state in the standby state.

Seawater, which is the uncooled side, is boosted by the seawater pump 20a, and the uncooled sides 4a, 4 of the heat exchangers 2a, 2b.
b, and the cooling water on the cooling sides 3a, 3b of the heat exchangers 2a, 2b is cooled. Inlet valves 30a, b and outlet valves 31a, b of the non-cooling sides 4a, 4b of the heat exchangers 2a, 2b in operation.
Is fully open. Further, the inlet valve 30c and the outlet valve 31c on the non-cooling side 4c of the heat exchanger 2c in the standby state are fully closed during the standby state.

FIG. 5 shows an emergency operating state of the auxiliary equipment cooling equipment which is assumed to operate even in an emergency. In an emergency, all systems, that is, two cooling water pumps, two seawater pumps, and three heat exchanger systems are operated.

As an example of the operating state in an emergency in FIG. 5, when the pumps with the suffixes a and b and the heat exchanger system with the suffixes a to c are operated, the cooling sides 3a to 3c of the heat exchangers 2a to 2c are considered. The cooling water is boosted by the cooling water pumps 1a and 1b,
It is supplied to the cooling sides 3a to 3c of the heat exchangers 2a to 2c and circulates in the cooling side system. The cooling water is the heat exchanger 2a-
In 2c, the heat generated in each auxiliary equipment 5 to be cooled is cooled. The inlet valves 10a to 10c and the outlet valves 11a to 11c on the cooling sides 3a to 3c of the operating heat exchangers 2a to 2c are in the fully opened state.

The seawater on the uncooled side is the seawater pump 20a,
The pressure is increased by 20b and supplied to the non-cooling sides 4a to 4c of the heat exchangers 2a to 2c, and the cooling side 3a of the heat exchangers 2a to 2c.
Cool the cooling water from ~ 3c. Heat exchangers 2a to 2 in operation
The inlet valves 30a to 30c and the outlet valves 31a to 31c on the non-cooling sides 4a to 4c of c are fully open.

Examples of the cooling equipment for auxiliary machinery of this type include, for example, Japanese Patent Laid-Open Nos. 4-282497 and 5-341090.

[0011]

The auxiliary equipment cooling equipment thus formed does not cause any particular problem during operation, however, this equipment has the following problems. That is, during many years of operation, marine life adheres to the uncooled side of the heat exchanger in standby, and it becomes necessary to disassemble and wash the uncooled side of the heat exchanger. Since it is also operated, the uncooled side of the heat exchanger that is on standby during normal operation cannot be disassembled and cleaned, and it is difficult to clean it, and there is a dislike that it cannot be sufficiently cleaned from the outside.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to sufficiently clean the non-cooling side of a standby heat exchanger without disassembling the non-cooling side of the standby heat exchanger. An object of the present invention is to provide a cleaning method of this type of auxiliary equipment cooling equipment and a heat exchanger for auxiliary equipment cooling equipment that can be performed.

[0013]

That is, the present invention comprises a plurality of heat exchangers arranged in parallel, a cooling water pump and a seawater pump coupled to these heat exchangers, and the heat exchangers In the cleaning method of the heat exchanger for auxiliary equipment cooling equipment, which is divided into an operating heat exchanger and a standby heat exchanger, these heat exchangers are switched to operate, and the standby heat By passing hot water to the cooling side of the exchanger, the standby heat exchanger is heated, and the marine life on the non-cooling side of the standby heat exchanger is removed to achieve the intended purpose. It is something that is done.

Further, a plurality of heat exchangers arranged in parallel and a cooling water pump and a seawater pump connected to these heat exchangers are provided, and the heat exchanger is connected to a heat exchanger in operation and a standby state. Along with the heat exchanger in the middle, in the auxiliary equipment cooling equipment formed to be able to operate by switching these heat exchangers, to the cooling side of the standby heat exchanger,
A hot water supply passage is provided between the heat exchanger on standby and the cooling water outlet of the auxiliary machine to be cooled so that the hot water outlet from the auxiliary machine to be cooled may be passed through.

[0015]

That is, according to the cleaning method of the auxiliary equipment cooling equipment and the heat exchanger for the auxiliary equipment cooling equipment formed as described above,
By passing part of the hot water at the outlet of each cooling target auxiliary equipment to the cooling side of the standby heat exchanger, the standby heat exchanger can be heated, and the standby heat exchanger is not cooled. It is possible to remove the marine organisms on the side, and the uncooled side can be sufficiently washed without disassembling the heat exchanger.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. FIG. 1 systematically shows the auxiliary equipment cooling equipment. ☆ Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the normal operating state of the auxiliary equipment cooling equipment that is assumed to operate even in an emergency. This auxiliary equipment cooling equipment consists of two systems of cooling water pumps connected in parallel,
It has a system seawater pump and 3 system heat exchangers, and during normal operation, operates 1 system cooling water pump, 1 system seawater pump and 2 system heat exchangers, and cools the remaining 1 system. The water pump, one system of seawater pump and one system of heat exchanger are on standby as a standby system.

FIG. 1 shows a subscript a as an example of a normal operating state.
Considering the case where the pump system of No. 2 and the heat exchanger system of suffixes a and b are operated, the cooling sides 3a and 3b of the heat exchangers 2a and 2b are considered.
The cooling water is pressurized by the cooling water pump 1a, supplied to the cooling sides 3a and 3b of the heat exchangers 2a and 2b, and circulates in the cooling side system. The cooling water is heat exchangers 2a and 2b.
At, the heat generated in each cooling target accessory 5 is cooled. The outlet valve 1 is installed in the cooling side outlet pipes 6a to 6c of the heat exchangers 2a to 2c.
Cleaning pipes 7a-c for hot water supply bypassing 1a-c
Is provided. The washing pipes for supplying hot water are provided with washing pipe stop valves 12a to 12c capable of adjusting the flow rate of hot water and isolating the heat exchanger during inspection.

Cooling side 3 of heat exchangers 2a, 2b in operation
a, 3b inlet valves 10a, 10b, outlet valves 11a, 11
b, the cleaning pipe stop valve 12ab is fully open. Also,
The inlet valve 10c on the cooling side 3c of the heat exchanger 2c in the standby state is fully opened, the cleaning pipe stop valve 12c is in the open state, and the outlet valve 11c is in the fully closed state in the standby state.

Seawater on the uncooled side is boosted by the seawater pump 20a, and the uncooled sides 4a, 4 of the heat exchangers 2a, 2b.
b, and the cooling water on the cooling sides 3a, 3b of the heat exchangers 2a, 2b is cooled. Inlet valves 30a, b and outlet valves 31a, b of the non-cooling sides 4a, 4b of the heat exchangers 2a, 2b in operation.
Is fully open. Further, the inlet valve 30c and the outlet valve 31c on the non-cooling side 4c of the heat exchanger 2c in the standby state are fully closed during the standby state.

In the operating state of the embodiment of the present invention, a part of the hot water at the outlet of each auxiliary equipment 5 to be cooled is supplied with a cleaning pipe 7c for supplying hot water.
The warming water is passed through the cooling side 3c of the heat exchanger 2c on standby by opening the cleaning pipe stop valve 12c provided on the non-cooling side 4c of the heat exchanger 2c on standby to warm it up. It becomes possible to remove the marine life on the non-cooling side 4c of the heat exchanger 2c, and the non-cooling side 4c can be washed without disassembling the non-cooling side 4c of the heat exchanger 2c.

FIG. 2 shows an emergency operating state of the auxiliary equipment cooling equipment which is assumed to operate even in an emergency. In an emergency, all the systems, that is, the two cooling water pumps, the two seawater pumps, and the three heat exchanger systems are operated.

Assuming that the pumps with the suffixes a and b and the heat exchanger system with the suffixes a to c are operated as an example of the operating state in an emergency in FIG. The cooling water is pressurized by the cooling water pumps 1a and 1b, supplied to the cooling sides 3a to 3c of the heat exchangers 2a to 2c, and circulates in the cooling side system. The cooling water cools the heat generated in each cooling target accessory 5 in the heat exchangers 2a to 2c. Heat exchanger 2
Outlet valves 11a to 11c are provided on the cooling side outlet pipes 6a to 6c of ac.
Washing pipes 7a to 7c for hot water supply that bypass the are provided. The washing pipes for supplying hot water are provided with washing pipe stop valves 12a to 12c capable of adjusting the flow rate of hot water and isolating the heat exchanger during inspection. Inlet valves 10a-c and outlet valves 11a-c of the cooling sides 3a-c of the heat exchangers 2a-c in operation.
c, the cleaning pipe stop valves 12a to 12c are fully open.

The seawater on the non-cooling side is the seawater pump 20a,
The pressure is increased by b, and the non-cooling side 4a of the heat exchangers 2a-c
c, and the cooling water on the cooling sides 3a to 3c of the heat exchangers 2a to 2c is cooled. Non-cooling side 4 of heat exchangers 2a-c in operation
The inlet valves 30a to 30c and the outlet valves 31a to 31c of ac are fully opened.

FIG. 3 is a diagram showing replacement of the operating heat exchanger and the standby heat exchanger of the auxiliary equipment cooling equipment of the embodiment of the present invention.

FIG. 3 shows a subscript a as an example of a normal operating state.
Considering the case of operating the pump system of No. 2 and the heat exchanger system of suffixes b and c, the cooling water on the cooling sides 3b and c of the heat exchangers 2b and 2c is boosted by the cooling water pump 1a, and the heat exchanger 2b. , C to the cooling side 3b, c and circulate in the cooling side system. The cooling water cools the heat generated in each cooling target auxiliary machine 5 in the heat exchangers 2b and 2c. Heat exchanger 2a
Cleaning pipes 7a to 7c for supplying hot water that bypass the outlet valves 11a to 11c are provided on the cooling side outlet pipes 6a to 6c.
The washing pipes for supplying hot water are provided with washing pipe stop valves 12a to 12c capable of adjusting the flow rate of hot water and isolating the heat exchanger during inspection.

Cooling side 3b of the heat exchangers 2b, c in operation,
The inlet valves 10b and 10c, the outlet valves 11b and 11c, and the cleaning pipe stop valve 12bc of c are fully opened. Further, the inlet side valve 10a on the cooling side 3a of the heat exchanger 2a in the standby state is fully opened, and the cleaning pipe stop valve 12
a is in an open state, and the outlet valve 11a is in a fully closed state during standby.

Seawater, which is the non-cooling side, is boosted by the seawater pump 20a and supplied to the non-cooling sides 4b and c of the heat exchangers 2b and c, and the cooling water of the cooling sides 3b and c of the heat exchangers 2b and c is supplied. Cooling. The non-cooled side 4b of the heat exchangers 2b, c in operation,
The inlet valves 30b and 30c and the outlet valves 31b and 31c of c are fully open. Further, the inlet valve 30a and the outlet valve 31a on the non-cooling side 4a of the heat exchanger 2a in the standby state are fully closed during the standby state.

In the operating state of the embodiment of the present invention, a part of the hot water at the outlet of each auxiliary equipment 5 to be cooled is supplied to the cleaning pipe 7a for supplying hot water.
The warming water is passed through the cooling side 3a of the heat exchanger 2a on standby by opening the cleaning pipe stop valve 12a provided on the non-cooling side 4a of the heat exchanger 2a on standby to warm it. It becomes possible to remove the marine life on the non-cooling side 4a of the heat exchanger 2a, and the non-cooling side 4a can be washed without disassembling the non-cooling side 4a of the heat exchanger 2a.

[0029]

As described above, according to the present invention, a part of the hot water at the outlet of each auxiliary equipment to be cooled is passed through the heat exchanger in the standby state, so that the heat exchanger in the standby state is not affected. It becomes possible to remove the marine organisms on the cooling side, and the non-cooling side can be sufficiently washed without disassembling the heat exchanger.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an operating state at a normal time, showing an embodiment of an auxiliary equipment cooling facility of the present invention.

FIG. 2 is a system diagram showing an operating state in an emergency, showing an embodiment of the auxiliary equipment cooling equipment of the present invention.

[Fig. 3] Fig. 3 is a diagram showing replacement of a heat exchanger in operation and a heat exchanger in standby of the auxiliary equipment cooling facility according to the embodiment of the present invention.

FIG. 4 is a system diagram showing an example of a normal operating state of a conventional auxiliary equipment cooling facility.

FIG. 5 is a system diagram showing an example of an emergency operation state of a conventional auxiliary equipment cooling facility.

[Explanation of symbols]

1a, 1b ... Cooling water pump, 2a-2c ... Heat exchanger, 3
a to 3c ... Heat exchanger cooling side, 4a to 4c ... Heat exchanger non-cooling side, 5 ... Auxiliaries to be cooled, 6a to 6c ... Heat exchanger cooling side outlet piping, 7a to 7c ... Washing for supplying hot water Piping, 10
a-10c ... Heat exchanger cooling side inlet valve, 11a-11c ...
Heat exchanger cooling side outlet valve, 12a to 12c ... Washing pipe stop valve, 20a, 20b seawater pump, 30a to 30c ... Heat exchanger non-cooling side inlet valve, 31a to 31c ... Heat exchanger non-cooling side outlet valve.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akio Tsuji 3-1-1, Saiwaicho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi factory

Claims (5)

[Claims] 1. A plurality of heat exchangers arranged in parallel,
A cooling water pump and a seawater pump coupled to these heat exchangers are provided, and the heat exchanger is divided into a heat exchanger in operation and a heat exchanger in standby, and these heat exchangers are switched to operate. In the cleaning method for the heat exchanger for auxiliary equipment cooling equipment, the cooling side of the heat exchanger in the standby state is caused to flow hot water to heat the heat exchanger in the standby state and wait. A method for cleaning a heat exchanger for an auxiliary equipment cooling facility, characterized in that marine life on the non-cooling side of the inner heat exchanger is removed. 2. A plurality of heat exchangers arranged in parallel,
A cooling water pump and a seawater pump coupled to these heat exchangers are provided, and the heat exchanger is divided into a heat exchanger in operation and a heat exchanger in standby, and these heat exchangers are switched to operate. In the cleaning method of the heat exchanger for the auxiliary equipment cooling facility, the cooling side of the heat exchanger in the standby state, by allowing a part of the outlet hot water of the auxiliary equipment to be cooled to pass, A method for cleaning a heat exchanger for an auxiliary equipment cooling facility, comprising heating a heat exchanger to remove non-cooled sea life and cleaning a heat exchanger in a standby state. 3. A plurality of heat exchangers arranged in parallel,
A cooling water pump and a seawater pump coupled to these heat exchangers are provided, and the heat exchanger is divided into a heat exchanger in operation and a heat exchanger in standby, and these heat exchangers are switched to operate. In the auxiliary equipment cooling equipment that is formed so as to allow the hot air outlet from the auxiliary equipment to be cooled to be passed to the cooling side of the heat exchanger that is on standby, the heat exchanger and the cooling equipment on standby are cooled. An auxiliary equipment cooling facility having a hot water supply path provided between the auxiliary equipment cooling water outlet. 4. A plurality of heat exchangers arranged in parallel,
A cooling water pump and a seawater pump coupled to these heat exchangers are provided, and the heat exchanger is divided into a heat exchanger in operation and a heat exchanger in standby, and these heat exchangers are switched to operate. In the auxiliary equipment cooling equipment that is formed so as to allow the hot air outlet from the auxiliary equipment to be cooled to be passed to the cooling side of the heat exchanger that is on standby, the heat exchanger and the cooling equipment on standby are cooled. An auxiliary equipment cooling facility characterized in that a hot water supply path is provided between the target auxiliary equipment cooling water outlet and a hot water flow rate adjusting valve for controlling the flow rate of hot water in the hot water supply path. 5. A supplementary valve according to claim 3, wherein a stop valve is provided in the hot water supply passage for supplying hot water to the non-cooling side of the heat exchanger in the standby state, the stop valve performing isolation during inspection of the heat exchanger. Machine cooling equipment.