An anti-flaming oil adsorption regeneration device

Abstract

The utility model discloses a kind of anti-flame oil adsorption regeneration devices, including inlet unit, oil pump, dehydration unit, regeneration unit and precision filtration unit connected in turn by pipeline;The inlet of inlet unit is connected with steam engine control oil tank bottom by pipeline;The outlet of precision filtration unit is connected to the upper portion of steam engine control oil tank by pipeline;It is also provided with a security unit and an electric control unit;Security unit includes main system overflow valve and system pressure alarm arranged on the outlet pipeline of oil pump, and differential pressure alarm before filter arranged before the import of precision filtration unit;Electric control unit is electrically connected with oil pump, system pressure alarm and differential pressure alarm before filter.The utility model can synchronously, efficiently solve the problem of anti-flame oil acid value, resistivity low, moisture content high, foam, oil sludge and other problems, compact structure, safe and convenient operation, especially suitable for H grade gas turbine power plant steam turbine DEH oil system online maintenance.

Description

Technical Field

[0001] This utility model relates to the field of maintenance technology for steam turbine control oil systems in gas turbine power plants, and more specifically, to an anti-oil adsorption regeneration device. Background Technology

[0002] The H-class heavy-duty gas turbine is the largest and most efficient gas-steam combined cycle (GCCB) unit in terms of single-unit capacity. It features a multi-shaft arrangement with the gas turbine and generator, and the steam turbine and generator, with an installed capacity of 2×669.3MW. Equipped with flue gas denitrification (FGD) systems and a heating network, it utilizes low-NOx combustion technology and high-efficiency SCR denitrification technology, making it a crucial clean energy support point for the Guangdong-Hong Kong-Macao Greater Bay Area. The steam turbine's DEH oil system is the main system ensuring turbine regulation and control, and a vital system for ensuring safe power plant operation. The key component of this system is the electro-hydraulic servo system, whose core element is the servo valve. Its performance determines the overall system performance (stability, speed, and accuracy). It is highly sensitive to oil quality; 90% of electro-hydraulic servo system failures originate from oil quality issues, highlighting its crucial role in the steam turbine control system.

[0003] The following common problems exist in the operation of fire-resistant oil: (1) Oxidation and deterioration under the action of oxygen, temperature, moisture, metal and other factors, producing organic acids, sludge, gum and asphalt and other substances; (2) Acidic substances in the oil corrode the metal surface of the mechanism, and the metal oxides and ions produced accelerate the oxidation and decomposition of the oil; (3) Abnormal working conditions, frequent start-up and shutdown, overload operation, overheating and other factors accelerate the aging of the oil; (4) The bypass regeneration device has been used for a long time without replacement, resulting in the failure of the filter element filling material, releasing particles, metal ions, etc., causing wear on the surface of the mechanism, producing soap, and causing foam characteristics and air release value to increase; (6) Problems such as leakage of the oil cooler or local overheating of the system pipeline lead to hydrolysis and oxidation of the oil; The above common EH oil problems cause corrosion of generator set components, damage to servo valves and precision metal parts of the oil system, resulting in non-stop of the unit, causing a series of accidents such as lag or inaccuracy of turbine system regulation and control. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, the purpose of this utility model is to provide a fire-resistant oil adsorption and regeneration device, comprising an oil inlet unit, an oil pump, a dehydration unit, a regeneration unit, and a precision filter unit connected in sequence through pipelines, forming a series oil treatment circuit; The inlet of the oil inlet unit is connected to the bottom of the turbine control oil tank via a pipe; The outlet of the precision filtration unit is connected to the upper part of the turbine control oil tank via a pipeline, forming a circulating purification path that draws oil from the bottom of the tank, processes it, and returns it to the upper part of the tank. The device also includes a security unit and an electronic control unit; The safety unit includes a main system overflow valve and a system pressure alarm installed on the oil pump outlet pipeline, and a pre-filter differential pressure alarm installed before the inlet of the precision filter unit. The electronic control unit is electrically connected to the oil pump, the system pressure alarm, and the differential pressure alarm before the fine filter, and is used to automatically control the start and stop of the oil pump according to the alarm signal.

[0005] As a preferred embodiment, the oil inlet unit includes an oil inlet valve and a replenishing oil valve arranged in parallel. The oil inlet valve is connected to the turbine control oil tank, and the replenishing oil valve is connected to an external new oil source. The outlets of the oil inlet valve and the replenishing oil valve are connected to the inlet of an oil suction filter.

[0006] As a preferred embodiment, the dehydration unit is a dehydrator filled with a highly efficient desiccant material, and the regeneration unit is a regenerator filled with a strongly polar molecular adsorbent; the dehydration unit and the regeneration unit are directly connected in series, so that the oil is first dehydrated and then regenerated by polar adsorption.

[0007] As a preferred embodiment, the precision filtration unit includes a coarse filter and a fine filter arranged in series; the coarse filter contains a wire-gap filter element, and the fine filter contains a micron-level precision filter element; the differential pressure alarm before the fine filter is also connected across the pipeline between the outlet of the coarse filter and the inlet of the fine filter.

[0008] A preferred embodiment also includes a bypass regeneration valve, the inlet of which is connected to the pipeline between the oil pump outlet and the dehydration unit inlet, and the outlet of which is connected to the pipeline between the regeneration unit outlet and the precision filter unit inlet, for use in cases where the system pressure is too high or deep regeneration is not required, to allow the oil to partially or completely bypass the dehydration unit and the regeneration unit.

[0009] As a preferred embodiment, all the units are integrated on a movable frame, and the pipe interfaces of the oil inlet unit and the precision filter unit are quick couplings.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention, through a series circuit and a specific process sequence of dehydration followed by regeneration, synergistically and efficiently reduces the acid value and moisture content of the oil, significantly improves its resistivity, and simultaneously improves foam characteristics, removes sludge and coloring substances, comprehensively solving various degradation problems of fire-resistant oil. The device is highly integrated, features automatic pressure protection and alarm functions, and is flexible in its movement and allows for online oil replenishment, significantly improving purification efficiency and operational safety. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the logic framework of this utility model. Detailed Implementation

[0012] The present invention will be further described below with reference to specific embodiments.

[0013] A fire-resistant oil adsorption and regeneration device includes an oil inlet unit 1, an oil pump 2, a dehydration unit 3, a regeneration unit 4 and a precision filter unit 5 connected in sequence through pipelines, forming a series oil treatment circuit. The inlet of oil inlet unit 1 is connected to the bottom of the turbine control oil tank via a pipeline; The outlet of the precision filter unit 5 is connected to the upper part of the turbine control oil tank through a pipeline, forming a circulation purification path that draws oil from the bottom of the tank, processes it, and returns it to the upper part of the tank. The device also includes a security unit 6 and an electrical control unit 7; The safety unit 6 includes a main system overflow valve 61 and a system pressure alarm 62 installed on the outlet pipeline of the oil pump 2, and a pre-filter differential pressure alarm 63 installed before the inlet of the precision filter unit 5. The electronic control unit 7 is electrically connected to the oil pump 2, the system pressure alarm 62, and the differential pressure alarm 63 before the fine filter, and is used to automatically control the start and stop of the oil pump 2 according to the alarm signal.

[0014] In operation, fire-resistant oil is first drawn from the bottom of the turbine control oil tank through the oil inlet unit 1. The oil then enters the oil pump 2, where it gains pressure and flows into the dehydration unit 3. The dehydration unit 3 efficiently removes moisture from the fire-resistant oil, reducing its water content. Next, the oil enters the regeneration unit 4, which removes acidic substances, particulate impurities, and degradation products, restoring the oil's performance. After treatment in the regeneration unit 4, the oil flows into the precision filter unit 5, which further filters out tiny particulate impurities, ensuring the oil's cleanliness. The cleaned oil then returns from the outlet of the precision filter unit 5 through a pipeline to the upper part of the turbine control oil tank. During operation, when the pressure in the outlet pipeline of oil pump 2 exceeds the pressure value set by the main system overflow valve 61, the main system overflow valve 61 will automatically open to overflow, preventing excessive system pressure from damaging the equipment. The system pressure alarm 62 will monitor the pressure in the outlet pipeline of oil pump 2 in real time and issue an alarm signal when the pressure is abnormal. The differential pressure alarm 63 before fine filtration will monitor the pressure difference before and after the inlet of the precision filter unit 5 and issue an alarm signal when the pressure difference exceeds the set value. After receiving these alarm signals, the electronic control unit 7 will automatically control the start and stop of oil pump 2 to ensure the safe and stable operation of the entire fire-resistant oil adsorption and regeneration device. The entire device has regeneration, dehydration, purification, sludge removal, and automatic oil replenishment functions. It can make the resistivity, acid value, moisture, and particle size of deteriorated fire-resistant oil meet or exceed the quality standards of new oil and ensure long-term qualification, while also making the oil color significantly lighter. It has an oil replenishment function, which can easily replenish the oil to be replenished into the oil system by simply switching the oil suction valve and the oil replenishment valve, without the need for repeated oil filtration.

[0015] In a preferred embodiment, the oil inlet unit 1 includes an oil inlet valve 11 and a replenishing oil valve 12 arranged in parallel. The oil inlet valve 11 is connected to the turbine control oil tank, and the replenishing oil valve 12 is connected to an external new oil source. The outlets of the oil inlet valve 11 and the replenishing oil valve 12 are connected to the inlet of an oil suction filter 13.

[0016] The outlet of the oil suction filter 13 is connected to the inlet of the oil pump 2. This arrangement ensures that the oil entering the oil pump 2 undergoes preliminary filtration, reducing impurities and damage to the pump, thereby improving its service life and operational stability. Simultaneously, this parallel arrangement of the inlet valve 11 and the replenishing valve 12 allows for flexible switching between normal oil intake and replenishment operations without interference, further enhancing the overall ease of operation and reliability of the device.

[0017] In a preferred embodiment, dehydration unit 3 is a dehydrator filled with a highly efficient desiccant material, and regeneration unit 4 is a regenerator filled with a strongly polar molecular adsorbent. Dehydration unit 3 and regeneration unit 4 are directly connected in series, allowing the oil to be dehydrated before undergoing polar adsorption regeneration. This ensures that water is effectively removed from the oil during processing, preventing water from interfering with the subsequent polar adsorption regeneration process and improving the regeneration effect. Simultaneously, both the highly efficient desiccant material in the dehydrator and the strongly polar molecular adsorbent in the regenerator have high adsorption capacity and long service life, ensuring long-term stable operation of the device and reducing maintenance costs. Furthermore, the direct series connection between dehydration unit 3 and regeneration unit 4 simplifies the device structure, reduces the flow resistance of the oil during processing, and improves processing efficiency.

[0018] In a preferred embodiment, the precision filtration unit 5 includes a coarse filter 51 and a fine filter 52 arranged in series. The coarse filter 51 contains a wire-gap filter element, and the fine filter 52 contains a micron-level precision filter element. A differential pressure alarm 63 before fine filtration is also connected across the pipeline between the outlet of the coarse filter 51 and the inlet of the fine filter 52. This allows the oil to undergo preliminary filtration through the coarse filter 51 before entering the fine filter 52, removing larger particles of impurities, reducing the filtration burden on the fine filter 52, and extending its service life. The wire-gap filter element has a large filtration area and good filtration performance, effectively intercepting larger particles of impurities. The micron-level precision filter element further refines the oil filtration, removing tiny particles and impurities, ensuring a high standard of oil purity. The differential pressure alarm 63 before fine filtration monitors the pressure difference between the outlet of the coarse filter 51 and the inlet of the fine filter 52 in real time. When the pressure difference exceeds a set value, it promptly issues an alarm signal, reminding the operator to clean or replace the filter element of the coarse filter 51 to ensure the normal operation of the entire filtration system.

[0019] A preferred embodiment also includes a bypass regeneration valve 8, the inlet of which is connected to the pipeline between the outlet of the oil pump 2 and the inlet of the dehydration unit 3, and the outlet of which is connected to the pipeline between the outlet of the regeneration unit 4 and the inlet of the precision filter unit 5. This valve is used to allow the oil to partially or completely bypass the dehydration unit 3 and the regeneration unit 4 when the system pressure is too high or deep regeneration is not required.

[0020] When the system detects that the pressure exceeds the safety threshold, or when it determines that deep regeneration of the oil is unnecessary based on actual operating conditions, the bypass regeneration valve 8 will automatically open, guiding the oil to bypass the dehydration unit 3 and the regeneration unit 4, and directly enter the precision filtration unit 5. This effectively avoids equipment damage that may be caused by excessive system pressure, improves the flexibility and efficiency of the entire process, ensures stable system operation under different operating conditions, and reduces unnecessary energy consumption and equipment wear.

[0021] In this preferred embodiment, all units are integrated onto a movable frame 9. The pipe interfaces of the oil inlet unit 1 and the precision filter unit 5 are connected using quick-connect couplings, making the installation and disassembly of the entire device extremely convenient and significantly reducing equipment commissioning and maintenance time. The movable frame 9 is equipped with casters at the bottom, facilitating flexible movement between different work sites and adapting to diverse working environment requirements. The quick-connect couplings have excellent sealing performance, effectively preventing oil leakage, ensuring the stability and safety of system operation, and also reducing the risk of environmental pollution that may result from leakage.

[0022] The contents not described in detail in this specification are existing technologies known to those skilled in the art, and their specifications and models can be selected according to actual conditions.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical embodiments described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fire-resistant oil adsorption and regeneration device, characterized in that, It includes an oil inlet unit (1), an oil pump (2), a dehydration unit (3), a regeneration unit (4), and a precision filter unit (5) connected in sequence through pipelines, forming a series oil treatment circuit; The inlet of the oil inlet unit (1) is connected to the bottom of the turbine control oil tank via a pipe; The outlet of the precision filtration unit (5) is connected to the upper part of the turbine control oil tank through a pipeline, forming a circulating purification path that draws oil from the bottom of the tank, processes it, and returns it to the upper part of the tank. The device is also equipped with a security unit (6) and an electronic control unit (7). The safety unit (6) includes a main system overflow valve (61) and a system pressure alarm (62) installed on the outlet pipeline of the oil pump (2), and a fine filter pre-filter differential pressure alarm (63) installed before the inlet of the precision filter unit (5). The electronic control unit (7) is electrically connected to the oil pump (2), the system pressure alarm (62) and the pre-filtration differential pressure alarm (63), and is used to automatically control the start and stop of the oil pump (2) according to the alarm signal.

2. The fire-resistant oil adsorption and regeneration device according to claim 1, characterized in that, The oil inlet unit (1) includes an oil inlet valve (11) and a replenishing oil valve (12) arranged in parallel. The oil inlet valve (11) is connected to the turbine control oil tank, and the replenishing oil valve (12) is connected to an external new oil source. The outlets of the oil inlet valve (11) and the replenishing oil valve (12) are connected to the inlet of an oil suction filter (13).

3. The fire-resistant oil adsorption and regeneration device according to claim 1, characterized in that, The dehydration unit (3) is a dehydrator filled with a high-efficiency water-absorbing agent material, and the regeneration unit (4) is a regenerator filled with a strong polar molecular adsorbent. The dehydration unit (3) and the regeneration unit (4) are directly connected in series, so that the oil is dehydrated first and then regenerated by polar adsorption.

4. The fire-resistant oil adsorption and regeneration device according to claim 1, characterized in that, The precision filtration unit (5) includes a coarse filter (51) and a fine filter (52) arranged in series; the coarse filter (51) is provided with a wire gap filter element, and the fine filter (52) is provided with a micron-level precision filter element; the differential pressure alarm (63) before fine filtration is also connected across the pipeline between the outlet of the coarse filter (51) and the inlet of the fine filter (52).

5. The fire-resistant oil adsorption and regeneration device according to claim 1, characterized in that, It also includes a bypass regeneration valve (8), the inlet of which is connected to the pipeline between the outlet of the oil pump (2) and the inlet of the dehydration unit (3), and its outlet is connected to the pipeline between the outlet of the regeneration unit (4) and the inlet of the precision filter unit (5), for use in cases where the system pressure is too high or deep regeneration is not required, to allow the oil to partially or completely bypass the dehydration unit (3) and the regeneration unit (4).

6. The fire-resistant oil adsorption and regeneration device according to claim 1, characterized in that, All of the units are integrated on a movable frame (9), and the pipe interfaces of the oil inlet unit (1) and the precision filter unit (5) are quick connectors.

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