Preheating and pre-supplying device of diesel generating set

Abstract

The utility model provides a preheating and pre-supplying device of a diesel generating set, which comprises two pre-lubricating oil pumps which are not interfered with each other and two high-temperature water preheating pumps which are not interfered with each other and are respectively used for continuously providing power for lubricating oil circulation and high-temperature water circulation and preheating lubricating oil when the diesel generating set does not work; wherein the two pre-lubricating oil pumps respectively form two pre-lubricating oil pipelines which are connected in parallel, and the two pre-lubricating oil pipelines which are connected in parallel share the same input port and the same output port; the two high-temperature water preheating pumps respectively form two high-temperature water preheating pipelines connected in parallel, and the two high-temperature water preheating pipelines connected in parallel share the same input port and the same output port. Under the condition that any one pre-lubricating oil pump and / or the high-temperature water pre-heating pump breaks down, the other pre-lubricating oil pump and / or the high-temperature water pre-heating pump can operate normally, it is guaranteed that the temperature of lubricating oil is kept within the required range all the time, and the diesel generating set can be started at any time in the low-temperature environment and can be loaded to the full load within the shortest time.

Description

Technical Field

[0001] The utility model relates to the technical field of preheating of nuclear-grade emergency diesel generator sets, and specifically, to a preheating and pre-supply device for a diesel generator set. Background Art

[0002] An emergency diesel generator set is one of the important components of the nuclear power plant system equipment and is also known as the last line of defense. For the safety functions it performs, it is required that each auxiliary equipment operates reliably, has a low failure rate, and is convenient for operation and maintenance. The normal operation of the nuclear-grade diesel generator set can ensure the normal operation of the nuclear reactor. To avoid the unavailability of the diesel generator set caused by the failure of the pre-lubricating oil pump or the high-temperature water preheating pump, measures need to be taken to control this matter.

[0003] Currently, no description or report of a similar technology to the present utility model has been found, and no similar materials at home and abroad have been collected either. Content of the Utility Model

[0004] In view of the above deficiencies in the prior art, the present utility model provides a preheating and pre-supply device and method for a diesel generator set.

[0005] According to one aspect of the present utility model, there is provided a preheating and pre-supply device for a diesel generator set, including: two non-interfering pre-lubricating oil pumps and two non-interfering high-temperature water preheating pumps, which are used to continuously provide power for the lubricating oil circulation and the high-temperature water circulation respectively, and then preheat the lubricating oil when the diesel generator set is not working; wherein:

[0006] The two pre-lubricating oil pumps are respectively connected to two first ball valves to form two parallel pre-lubricating oil pipelines. A first check valve is also connected between each pre-lubricating oil pump and one of the first ball valves; the two parallel pre-lubricating oil pipelines share the same input and output ports;

[0007] The two high-temperature water preheating pumps are respectively connected to two second ball valves to form two parallel high-temperature water preheating pipelines. A second check valve is also connected between each high-temperature water preheating pump and one of the second ball valves; the two parallel high-temperature water preheating pipelines share the same input and output ports.

[0008] Preferably, in the case of the failure of any one of the pre-lubricating oil pumps and / or any one of the high-temperature water preheating pumps, the other pre-lubricating oil pump and / or the other high-temperature water preheating pump can operate normally to continuously provide power for the lubricating oil circulation and the high-temperature water circulation.

[0009] Preferably, the device further includes: a high-temperature water-lubricating oil plate heat exchanger and a high-temperature water electric heater; wherein:

[0010] After the output ports of the two parallel pre-lubricating oil pipelines are connected to the high-temperature water and electricity heater through pipelines, they are then connected to the high-temperature water and lubricating oil plate heat exchanger;

[0011] The output ports of the two parallel high-temperature water preheating pipelines are connected to the high-temperature water and lubricating oil plate heat exchanger through pipelines.

[0012] Preferably, a temperature sensor and a temperature switch are further provided on the high-temperature water and electricity heater.

[0013] Preferably, a pressure sensor and a temperature sensor are further provided on the connecting pipeline between the output port of the pre-lubricating oil pipeline and the high-temperature water and electricity heater.

[0014] Preferably, a pressure sensor and a temperature sensor are further provided on the connecting pipeline between the output port of the high-temperature water preheating pipeline and the high-temperature water and lubricating oil plate heat exchanger.

[0015] According to another aspect of the present invention, a preheating and pre-supply method for a diesel generator set is provided, characterized in that this method uses the preheating and pre-supply device for a diesel generator set described in any one of the above of the present invention, applies this device to the lubricating oil preheating system of the diesel generator set, continuously provides power for the lubricating oil circulation and the high-temperature water circulation, and then preheats the lubricating oil when the diesel generator set is not working.

[0016] Due to the adoption of the above technical solutions, compared with the prior art, the present invention has at least one of the following beneficial effects:

[0017] The preheating and pre-supply device and method for a diesel generator set provided by the present invention can preheat the lubricating oil when the nuclear-grade emergency diesel generator set is not working, ensure that the temperature of the lubricating oil always remains within the required range, enable the nuclear-grade emergency diesel generator set to be started at any time in a low-temperature environment, and be loaded to full load in the shortest time.

[0018] The preheating and pre-supply device and method for a diesel generator set provided by the present invention can operate normally when any one of the two pre-lubricating oil pumps functions normally and any one of the two high-temperature water preheating pumps functions normally, thus greatly improving the safety and reliability of the lubricating oil preheating system.

[0019] The preheating and pre-supply device and method for a diesel generator set provided by the present invention are provided with two non-interfering pre-lubricating oil pumps and two non-interfering high-temperature water preheating pumps, so that the device can operate normally when any one of the two pre-lubricating oil pumps functions normally and any one of the two high-temperature water preheating pumps functions normally, thus greatly improving the safety and reliability of the lubricating oil preheating system.

[0020] The preheating and pre - supply device and method for diesel generator sets provided by the utility model adopt modular design, have few external interfaces, and are convenient to install; each pump can be used independently and can be repaired separately during operation, which is convenient for maintenance.

[0021] The preheating and pre - supply device and method for diesel generator sets provided by the utility model ensure the reliability and safety of the lubricating oil preheating of the unit, ensure the safe and reliable operation function of the unit, are especially suitable for the emergency diesel generator sets used in nuclear power plants, and can also be applied to the lubricating oil preheating systems of other diesel generator sets with relatively high reliability requirements. Brief Description of the Drawings

[0022] By reading the detailed description of the non - restrictive embodiments with reference to the following drawings, other features, purposes and advantages of the utility model will become more obvious:

[0023] Figure 1 It is a schematic structural diagram of the preheating and pre - supply device for nuclear power emergency diesel generator sets provided by the utility model in a preferred embodiment of the utility model.

[0024] In the figure, 1, 2, 9, 10 are normally open ball valves; 3, 4 are high - temperature water preheating pumps; 5, 6 are pre - lubricating oil pumps; 7, 8 are check valves; 11 is a high - temperature water lubricating oil plate heat exchanger; 12 is a high - temperature water electric heater; MT is a temperature sensor; MP is a pressure sensor; ST is a temperature switch. Detailed Embodiment

[0025] The following is a detailed description of the embodiments of the utility model: This embodiment is implemented on the premise of the technical solution of the utility model, and gives detailed implementation manners and specific operation processes. It should be noted that for those of ordinary skill in the art, without departing from the concept of the utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the utility model.

[0026] Aiming at the problem in the prior art that the unavailability of diesel generator sets caused by the failure of pre - lubricating oil pumps or high - temperature water preheating pumps cannot be avoided, an embodiment of the utility model provides a preheating and pre - supply device for nuclear power emergency diesel generator sets. The device is provided with two non - interfering pre - lubricating oil pumps and two non - interfering high - temperature water preheating pumps, and can operate normally as long as any one of the two pre - lubricating oil pumps functions normally and any one of the two high - temperature water preheating pumps functions normally, thus greatly improving the safety and reliability of the lubricating oil preheating system.

[0027] Specifically, as Figure 1As shown, the preheating and pre - supply device for a diesel - generator set provided in this embodiment may include: two non - interfering pre - lubricating oil pumps and two non - interfering high - temperature water pre - heating pumps, which are used to continuously provide power for the lubricating oil circulation and the high - temperature water circulation respectively, and thus pre - heat the lubricating oil when the diesel - generator set is not working; where:

[0028] The two pre - lubricating oil pumps are respectively connected to two first ball valves to form two parallel pre - lubricating oil pipelines. A first check valve is also connected between each pre - lubricating oil pump and one of the first ball valves; the two parallel pre - lubricating oil pipelines share the same input and output ports;

[0029] The two high - temperature water pre - heating pumps are respectively connected to two second ball valves to form two parallel high - temperature water pre - heating pipelines. A second check valve is also connected between each high - temperature water pre - heating pump and one of the second ball valves; the two parallel high - temperature water pre - heating pipelines share the same input and output ports.

[0030] Further, in the case where any one of the pre - lubricating oil pumps and / or any one of the high - temperature water pre - heating pumps fails, the other pre - lubricating oil pump and / or the other high - temperature water pre - heating pump can operate normally to continuously provide power for the lubricating oil circulation and the high - temperature water circulation.

[0031] The ball valves and check valves are provided to be closed when the corresponding pump group is damaged or needs maintenance, so that the device can rely on the other set of pump groups to operate normally without being affected.

[0032] In some preferred embodiments, the above - mentioned device further includes: a high - temperature water - lubricating oil plate heat exchanger and a high - temperature water electric heater; where:

[0033] The output ports of the two parallel pre - lubricating oil pipelines are connected to the high - temperature water electric heater through pipelines and then connected to the high - temperature water - lubricating oil plate heat exchanger;

[0034] The output ports of the two parallel high - temperature water pre - heating pipelines are connected to the high - temperature water - lubricating oil plate heat exchanger through pipelines.

[0035] In some preferred embodiments, a temperature sensor and a temperature switch are further provided on the high - temperature water electric heater.

[0036] The high - temperature water electric heater is provided, and its heating of high - temperature water is controlled by the temperature switch to ensure that the temperature of the high - temperature water always remains within the required range.

[0037] The high - temperature water - lubricating oil plate heat exchanger is provided to pre - heat the lubricating oil with high - temperature water to ensure that the temperature of the lubricating oil always remains within the required range.

[0038] In some preferred embodiments, a pressure sensor and a temperature sensor are further provided on the connecting pipeline between the output port of the pre-lubricating oil pipeline and the high-temperature water electric heater.

[0039] In some preferred embodiments, a pressure sensor and a temperature sensor are further provided on the connecting pipeline between the output port of the high-temperature water preheating pipeline and the high-temperature water lubricating oil plate heat exchanger.

[0040] A pressure sensor, a temperature sensor and a temperature switch are provided to monitor the pressure and temperature of high-temperature water and lubricating oil in real time, and adjust the device in real time according to the measurement results to ensure that the temperature of the lubricating oil always remains within the required range.

[0041] The following further details the technical solutions provided in the above embodiments of the present invention with reference to the accompanying drawings.

[0042] As Figure 1 shown, the preheating and pre-supply device for a diesel generator set provided in the above embodiments of the present invention is provided with a total of eight ball valves 1, 2, 9, 10, four check valves 7, 8, two pre-lubricating oil pumps 5, 6, two high-temperature water preheating pumps 3, 4, a high-temperature water lubricating oil plate heat exchanger 11, a high-temperature water electric heater 12, and a number of pressure sensors, temperature sensors and temperature switches.

[0043] In order to ensure the real-time normal operation of the device, two non-interfering pre-lubricating oil pumps and two non-interfering high-temperature water preheating pumps are provided in the above embodiments of the present invention; the two high-temperature water preheating pumps form a parallel high-temperature water preheating pipeline to provide power for the high-temperature water circulation; the two pre-lubricating oil pumps form a parallel pre-lubricating oil pipeline to provide power for the lubricating oil circulation; in the case of a failure of any one of the pre-lubricating oil pumps and high-temperature water preheating pumps, the device can operate normally alone relying on the other pre-lubricating oil pump and high-temperature water preheating pump.

[0044] In order to ensure the real-time normal operation of the device, the above embodiments of the present invention further provide ball valves and check valves, which are used to close when the corresponding pump group is damaged or needs to be overhauled, so that the device can operate normally relying on the other set of pump groups without being affected.

[0045] In order to ensure that the temperature of the lubricating oil always remains within the required range, the above embodiments of the present invention provide a high-temperature water lubricating oil plate heat exchanger for preheating the lubricating oil with high-temperature water.

[0046] In order to ensure that the temperature of the high-temperature water always remains within the required range, the above embodiments of the present invention provide a high-temperature water electric heater, and use a temperature switch to control its heating of the high-temperature water.

[0047] In order to ensure that the temperature of the lubricating oil always remains within the required range, the above-described embodiment of the present utility model is provided with a pressure sensor, a temperature sensor and a temperature switch, which are used to monitor the pressure and temperature of the high-temperature water and the lubricating oil in real time, and adjust the device in real time according to the measurement results.

[0048] An embodiment of the present utility model further provides a preheating and pre-supplying method for a diesel generator set. This method uses the preheating and pre-supplying device of any one of the above-described embodiments of the present utility model, and applies this device to the lubricating oil preheating system of the diesel generator set to continuously provide power for the lubricating oil circulation and the high-temperature water circulation, and then preheat the lubricating oil when the diesel generator set is not working.

[0049] It should be noted that the steps in the method provided by the present utility model can be implemented by corresponding components in the device. Those skilled in the art can refer to the technical solution of the device to implement the step flow of the method. That is, the embodiments in the device can be understood as preferred examples for implementing the method, and will not be elaborated here.

[0050] The preheating and pre-supplying device and method for a diesel generator set provided by the above-described embodiment of the present utility model can preheat the lubricating oil when the nuclear-grade emergency diesel generator set is not working, ensure that the temperature of the lubricating oil always remains within the required range, enable the nuclear-grade emergency diesel generator set to be started at any time in a low-temperature environment, and be loaded to full load in the shortest time; enable normal operation when any one of the two pre-lubricating oil pumps functions normally and any one of the two high-temperature water preheating pumps functions normally, thus greatly improving the safety and reliability of the lubricating oil preheating system; set two non-interfering pre-lubricating oil pumps and two non-interfering high-temperature water preheating pumps, enable normal operation when any one of the two pre-lubricating oil pumps functions normally and any one of the two high-temperature water preheating pumps functions normally, thus greatly improving the safety and reliability of the lubricating oil preheating system; adopt a modular design, with few external interfaces and convenient installation; each pump can be used independently and can be repaired separately during operation, which is convenient for maintenance; ensure the reliability and safety of the lubricating oil preheating of the unit, ensure the safe and reliable operation function of the unit, and is especially suitable for the lubricating oil preheating system of nuclear power plant emergency diesel generator sets, and can also be applied to the lubricating oil preheating systems of other diesel generator sets with higher reliability requirements.

[0051] Matters not described in detail in the above-described embodiment of the present utility model are all well-known technologies in the art.

[0052] The specific embodiments of the present utility model have been described above. It should be understood that the present utility model is not limited to the above specific embodiments, and those skilled in the art can make various deformations or modifications within the scope of the claims, which do not affect the essence of the present utility model.

Claims

1. A preheating and presupplying device for a diesel generator set, characterized in that: include: Two non-interfering pre-lubricating oil pumps and two non-interfering high-temperature water preheating pumps are used to continuously provide power to the lubricating oil circulation and high-temperature water circulation respectively, thereby preheating the lubricating oil when the diesel generator set is not working; among them: The two pre-lubricating oil pumps are respectively connected to the two first ball valves to form two parallel pre-lubricating oil pipelines, and a first check valve is further connected between each of the two pre-lubricating oil pumps and one of the first ball valves; the two parallel pre-lubricating oil pipelines share the same input and output port; The two high-temperature water preheating pumps are respectively connected to the two second ball valves to form two parallel high-temperature water preheating pipelines. A second check valve is also connected between each of the high-temperature water preheating pumps and one of the second ball valves; the two parallel high-temperature water preheating pipelines share the same input and output ports.

2. The preheating and presupplying device for a diesel generator set according to claim 1 is characterized in that: In the event of failure of any pre-lubricating oil pump and / or any high-temperature water preheating pump, another pre-lubricating oil pump and / or another high-temperature water preheating pump can operate normally to continuously provide power for the lubricating oil circulation and the high-temperature water circulation.

3. The preheating and presupplying device for a diesel generator set according to claim 1 is characterized in that: Also includes: High temperature water lubricating oil plate heat exchanger and high temperature water electric heater; among which: The output ports of the two parallel pre-lubricating oil pipelines are connected to the high-temperature water electric heater through pipelines, and then connected to the high-temperature water lubricating oil plate heat exchanger; The output ports of the two parallel high-temperature water preheating pipelines are connected to the high-temperature water lubricating oil plate heat exchanger through pipelines.

4. The preheating and presupplying device for a diesel generator set according to claim 3 is characterized in that: The high-temperature hydroelectric heater is also provided with a temperature sensor and a temperature switch.

5. The preheating and presupplying device for a diesel generator set according to claim 3 is characterized in that: A pressure sensor and a temperature sensor are also provided on the connecting pipeline between the output port of the pre-lubricating oil pipeline and the high-temperature water-electric heater.

6. The preheating and presupplying device for a diesel generator set according to claim 3 is characterized in that: A pressure sensor and a temperature sensor are also provided on the connecting pipeline between the output port of the high-temperature water preheating pipeline and the high-temperature water lubricating oil plate heat exchanger.

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