JP3241904U - EH oil cooler cooling water optimization system - Google Patents

Abstract

An EH oil cooler cooling water optimization system that consumes less power, has significant energy savings, can operate continuously, and can meet valve cooling and related steam turbine testing requirements. The EH oil cooler cooling water optimization system adds one passage of cooling water to each of the EH oil cooler cooling water systems of the two units, and the water supply pipe and return pipe each have a water supply manual door and a return pipe. A water manual door is installed to connect the front and back of the original water supply and return water manual doors, supplying water from the public cooling water supply main of the power station and returning to the public cooling water return water main. After the unit shuts down, the EH oil cooler cooling water of the shutting down unit is switched from the closed water supply of the shutting down unit to the public cooling water supply, and the closed water supply system of the unit shuts down. [Selection drawing] Fig. 1

Description

This utility model relates to the field of power plant and industrial cooling water technology, specifically to an EH oil cooler cooling water optimization system.

At present, in thermal power plants, the hydraulic oil of the unit's digital electro-hydraulic system adopts high-pressure flame-retardant oil, and the oil temperature is controlled between 35℃ and 55℃. The EH oil system oil is sent from the EH oil tank to the DEH actuator of the steam turbine after being pressurized by the EH oil pump. Return to the EH oil tank.

In addition to the normal system oil return and cooling, the oil supply system also adds an independent circulation cooling circuit driven by the EH oil circulation pump to keep the oil temperature in the EH oil tank within the normal operating temperature range. can be controlled. The circulation pump of the EH oil in the cooling system is started by the interlock control of the temperature switch so that the EH oil in the EH oil tank can be driven back to the EH oil tank after being cooled by the cooler B. , can be flexibly started or stopped at the actual oil temperature by the operator.

Currently, the EH oil cooler cooling water for the 1st and 2nd units is supplied and returned separately via the closed water supply system for the 1st and 2nd units. When one unit shuts down, the EH oil system must run continuously to cool the valves or meet steam turbine static testing requirements. As a result, the closed water supply system must be operated continuously, which is very uneconomical.

Considering the problems existing in the current technology, this utility model provides an EH oil cooler cooling water optimization system, optimizes and modifies the EH oil cooler cooling water, and provides a cooling water source for feed water and return water. , 2 units of closed water supply public cooling water is used to operate a single device with the operation of the EH oil system, which solves the electrical loss caused by the operation of the closed water supply system and the continuous operation of the EH oil system. It can guarantee the oil temperature of time and meet the static test requirements of steam turbines.

To achieve the above objectives, this utility model provides the following technical solutions.
An EH oil cooler cooling water optimization system comprising a 1# unit EH oil cooler, a 2# unit EH oil cooler, a public cooling water supply main and a public cooling water return main.

The public cooling water supply main is connected to the water supply pipe, the outlet end of the water supply pipe is connected in parallel with the first pipe A and the second pipe A, and the first pipe A is the EH oil cooler of the 1# unit. and the second pipe A is connected to the cooling water inlet end of the EH oil cooler of the 2# unit.

The cooling water outlet end of the EH oil cooler of the 1# unit is connected to the first pipe B, the cooling water outlet end of the EH oil cooler of the 2# unit is connected to the second pipe B, and the first pipe B and the The second pipe B is connected in parallel to the drain pipe, and the outlet end of the drain pipe is connected to the public cooling water return main pipe.

The first pipe A is connected to the rear pipe of the original cooling water supply manual door of the EH oil cooler of the 1# unit, and the first pipe B is the original cooling water return water of the EH oil cooler of the 1# unit. It is connected to the front pipe of the manual door, the second pipe A is connected to the rear pipe of the cooling water supply manual door of the EH oil cooler of the 2# unit, and the second pipe B is connected to the EH of the 2# unit. It is connected to the front piping of the original cooling water return water manual door of the oil cooler.

As a further optimized technical solution, the water supply pipe is installed with a first valve, the first pipe A is installed with a second valve, and the second pipe A is installed with a third valve.
A fourth valve is installed on the public cooling water return main pipe, a fifth valve is installed on the first pipe B, and a sixth valve is installed on the second pipe B.

As a further optimized technical solution, said first valve, second valve, third valve, fourth valve, fifth valve and sixth valve are all manual valves.

As a further optimized technical solution, it is additionally equipped with a 1# unit cooler for self-circulating cooling of the EH oil in the 1# unit.
As a further optimized technical solution, the outlet end of the first pipe A is branched into one path and connected to the 1# unit cooler, and the inlet end of the first pipe B is branched into the 1st # Connect to the unit cooler.

As a further optimized technical solution, it is additionally equipped with a 2# unit cooler for self-circulating cooling of the EH oil in the 2# unit.

As a further optimized technical solution, the outlet end of the second pipe A is branched into one line and connected to the 2# unit cooler, and the inlet end of the second pipe B is branched into the two # Connect to the unit cooler.

Compared with the prior art, the beneficial effects of this utility model are as follows.

Regarding the cooling water system of the EH oil cooler, this utility model adds one channel of cooling water to each of the EH oil cooler cooling water systems of the two units, and the water supply pipe and the return pipe each have a water supply manual door and a return pipe. A water manual door is installed to connect the front and back of the original water supply and return water manual doors, supplying water from the public cooling water supply main of the power station and returning to the public cooling water return water main. After the unit shuts down, the EH oil cooler cooling water of the shutting down unit is switched from the closed water supply of the shutting down unit to the public cooling water supply, and the closed water supply system of the unit shuts down. As a result, power consumption is reduced, and the energy saving effect is remarkable. At the same time, the EH oil system can operate continuously to meet valve cooling and related steam turbine testing requirements. After stopping the condensate pump of the unit-type water supply system user, the EH oil cooler can be switched from the closed-type water supply cooling of the unit to the public cooling water cooling, thus shutting down the closed-type water supply system to realize energy saving. The energy-saving effect of the present invention is remarkable in terms of the number of annual adjustment reserves and time for the two units. During shutdown and maintenance periods of the closed water supply system of this unit, or if the closed water supply system cannot be started, ensure the temperature of the oil during continuous operation of the EH oil system, static test the steam turbine, valves of the steam turbine of cooling requirements can be met. The cooling water of the EH oil cooler can be supplied and returned via two unit public cooling water pipes to ensure the reliability of the cooling water.

1 is a schematic diagram of an EH oil cooler cooling water system of an embodiment; FIG.

Here, 100, 1# unit EH oil cooler, 200, 2# unit EH oil cooler, 300, public cooling water supply main, 400, public cooling water return main, 500, water supply pipe, 501, 1st valve , 510, first pipe A, 511, second pipe A, 512, second valve, 513, third valve, 520, drain pipe, 521, first pipe B, 522, second pipe B, 523, fourth Valve, 524, 5th valve, 525, 6th valve, 530, 1# unit EH oil cooler original cooling water supply manual door Rear piping, 531, 1# unit EH oil cooler original cooling water return manual door Front piping, 540, 2# unit EH oil cooler original cooler rear cooling water supply manual door piping, 541, 2# unit EH oil cooler original cooling water return water manual door front piping, 600 , 1# unit cooler, 700, 2# unit cooler.

Specific embodiments of the present utility model will now be described in detail in conjunction with accompanying drawings and examples. The following examples are used to illustrate the utility model, but are not intended to limit the scope of the utility model.

In the description of this application, "middle", "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", Directions or positional relationships indicated by "inside", "outside", etc. are based on directions or positional relationships shown in the accompanying drawings and are for ease of explanation and simplification of the description of the utility model. and does not indicate or imply that any device or part is required to have a particular orientation, be constructed and operated in a particular orientation, and is not understood to limit the scope of this utility model. want to be

It should be understood that "first" and "second" are used for descriptive purposes and do not indicate or imply relative importance or imply the number of technical features shown. Thus, features defined by "first" and "second" may explicitly or implicitly include one or more of those features. In the description of this application, unless stated otherwise, "plurality" means two or more.

In the description of this application, the terms "installation", "communication" and "connection" should be understood broadly, unless expressly specified and limited to the contrary. For example, it may be a fixed connection, a removable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, as well as a connection via an intermediate, or a connection within two parts. A person skilled in the art can understand the specific meaning of the above terms depending on the specific situation.

As shown in Figure 1, the preferred embodiment of the present utility model is an EH oil cooler cooling water optimization system, comprising a 1# unit EH oil cooler 100, a 2# unit EH oil cooler 200, and a public cooling water It comprises a water supply main 300 and a public cooling water return water main 400, said public cooling water supply main 300 being connected to a water supply pipe 500, the outlet end of said water supply pipe 500 connecting a first pipe A 510 and a second pipe. The first pipe A 510 is connected to the cooling water inlet end of the EH oil cooler 100 of the 1# unit, and the second pipe A 511 is connected to the EH oil cooler 200 of the 2# unit. The cooling water outlet end of the EH oil cooler 100 of the 1# unit is connected to the first pipe B 521, and the cooling water outlet end of the EH oil cooler 200 of the 2# unit is connected to the second pipe B 522, the first pipe B 521 and the second pipe B 522 are connected in parallel to the drain pipe 520, the outlet end of the drain pipe 520 is connected to the public cooling water return main pipe 400, the The first pipe A 510 is connected to the rear pipe 530 of the original cooling water supply manual door of the EH oil cooler of the 1# unit, and the first pipe B 521 is the original cooling water of the EH oil cooler of the 1# unit. It is connected to the front pipe 531 of the return water manual door, the second pipe A 511 is connected to the rear pipe 540 of the original cooling water supply manual door of the EH oil cooler of the 2# unit, and the second pipe B 522 is It is connected to the front pipe 541 of the original cooling water return water manual door of the EH oil cooler of the 2# unit.

In some embodiments of the present application, a first valve 501 is installed in the water supply pipe 500, a second valve 512 is installed in the first pipe A 510, and a third valve 513 is installed in the second pipe A 511. A fourth valve 523 is installed on the first pipe B 521 , a fifth valve 524 is installed on the second pipe B 522 , and a sixth valve 525 is installed on the drain pipe 520 . In this embodiment, the first valve 501, second valve 512, third valve 513, fourth valve 523, fifth valve 524 and sixth valve 525 are all manual valves.

Some embodiments of the present application further include a 1# unit cooler 600 for self-circulating cooling of the EH oil of the 1# unit. The outlet end of the first pipe A 510 is branched into one path and connected to the 1# unit cooler 600 , and the inlet end of the first pipe B 521 is branched into one path and connected to the 1# unit cooler 600 .

Some embodiments of the present application further include a 2# unit cooler 700 for self-circulating cooling of EH oil in the 2# unit. The outlet end of the second pipe A 511 is branched into one path and connected to the 2# unit cooler 700 , and the inlet end of the second pipe B 522 is branched into one path and connected to the 2# unit cooler 700 .

In the embodiment of the present application, the public cooling water supply main 300 and the public cooling water return main 400 are connected to the pipes respectively, and the first valve 501, the sixth valve 525 and the mains play the role of isolation.

Add the cooling water supply pipe for the EH oil cooler 100 of the 1# unit, connect it to the rear pipe of the first valve 501, and supply the original cooling water of the EH oil cooler of the 1# unit via the newly installed second valve 512. Connect to the rear piping 530 of the water supply manual door.

The cooling water return water piping for the EH oil cooler 100 of the 1# unit was added, and the original cooling water return water piping 531 of the EH oil cooler of the 1# unit via the newly installed 4th valve 523 was sent to the public. It is connected to the pipe in front of the cooling water return water sixth valve 525 .

The cooling water supply pipe for the EH oil cooler 200 of the 2# unit is added, and the original cooling water of the EH oil cooler of the 2# unit passes through the newly installed 3rd valve 513 from the rear pipe of the public cooling water supply 1st valve 501. Connect to the rear pipe 540 of the water supply manual door.

Cooling water supply piping for the EH oil cooler 200 of the 2# unit is added, and the original cooling water return water of the EH oil cooler of the 2# unit is supplied via the newly installed 5th valve 524 to the front piping 541 of the manual door for public cooling. Connect to the front piping of the water return water sixth valve 525 .

If the oil temperature of EH oil is too high, the cooling circulation pump can be started, and the oil in the oil tank will self-circulate through 1# Unit Cooler 600 and 2# Unit Cooler 700, and after cooling, return to the EH oil tank. Return or the EH oil in the EH oil tank is pressurized by the EH oil pump and sent to each actuator of the steam turbine, and the return oil from each actuator is filtered by a filter and then cooled by the oil cooler. Return to the EH oil tank. Cooling water from the above cooling methods can be supplied by the original closed water supply system or by public cooling water. In particular, after the unit is stopped, the cooling water of the EH oil cooler of the stopped unit is switched from the closed water supply of the stopped unit to the public cooling water supply, the closed water supply system of the unit is stopped, and the electricity consumption is reduced; The energy saving effect is remarkable.

The above are only preferred embodiments of the present utility model. It should be explained that for those skilled in the art, some improvements and replacements can be made without departing from the technical principle of this utility model, and these improvements and replacements are considered to be within the protection scope of this utility model. .

Claims (7)

Equipped with a 1# unit EH oil cooler, a 2# unit EH oil cooler, a public cooling water supply main and a public cooling water return main,
The public cooling water supply main is connected to the water supply pipe, the outlet end of the water supply pipe is connected in parallel with the first pipe A and the second pipe A, and the first pipe A is the EH oil cooler of the 1# unit. The second pipe A is connected to the cooling water inlet end of the EH oil cooler of the 2# unit,
The cooling water outlet end of the EH oil cooler of the 1# unit is connected to the first pipe B, the cooling water outlet end of the EH oil cooler of the 2# unit is connected to the second pipe B, and the first pipe B and the The second pipe B is connected in parallel to the drainage pipe, and the outlet end of the drainage pipe is connected to the public cooling water return water main pipe,
The first pipe A is connected to the rear pipe of the original cooling water supply manual door of the EH oil cooler of the 1# unit, and the first pipe B is the original cooling water return water of the EH oil cooler of the 1# unit. It is connected to the front pipe of the manual door, the second pipe A is connected to the rear pipe of the cooling water supply manual door of the EH oil cooler of the 2# unit, and the second pipe B is connected to the EH of the 2# unit. An EH oil cooler cooling water optimization system characterized by being connected to the front piping of the original cooling water return water manual door of the oil cooler. 2. The EH oil cooler cooling water optimization system according to claim 1, wherein a first valve is installed on the water supply pipe, a second valve is installed on the first pipe A, and a third valve is installed on the second pipe A. valve is installed
The EH oil cooler is characterized in that a fourth valve is installed in the public cooling water return main pipe, a fifth valve is installed in the first pipe B, and a sixth valve is installed in the second pipe B. Cooling water optimization system. 3. The EH oil cooler cooling water optimization system according to claim 2, wherein all of the first, second, third, fourth, fifth, and sixth valves are manual valves. EH oil cooler cooling water optimization system featuring The EH oil cooler cooling water optimization system according to claim 1, further comprising a 1# unit cooler for self-circulating cooling of EH oil in the 1# unit. . 5. The EH oil cooler cooling water optimization system according to claim 4, wherein the outlet end of the first pipe A is branched and connected to the 1# unit cooler, and the inlet end of the first pipe B is An EH oil cooler cooling water optimization system characterized by branching into one path and connecting to the 1# unit cooler. The EH oil cooler cooling water optimization system according to claim 1, further comprising a 2# unit cooler for self-circulating cooling of EH oil in the 2# unit. . 7. The EH oil cooler cooling water optimization system according to claim 6, wherein the outlet end of the second pipe A is branched and connected to the 2# unit cooler, and the inlet end of the second pipe B is An EH oil cooler cooling water optimization system characterized by branching into one path and connecting to the 2# unit cooler.

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