CN114962099A - High-power diesel engine fuel oil pretreatment system - Google Patents

High-power diesel engine fuel oil pretreatment system Download PDF

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Publication number
CN114962099A
CN114962099A CN202111579508.8A CN202111579508A CN114962099A CN 114962099 A CN114962099 A CN 114962099A CN 202111579508 A CN202111579508 A CN 202111579508A CN 114962099 A CN114962099 A CN 114962099A
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China
Prior art keywords
filter
fuel
control
parallel
cleanliness
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Application number
CN202111579508.8A
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Chinese (zh)
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CN114962099B (en
Inventor
刘广才
郭立君
浦卫华
李晓声
刘洋
王昌庆
赵伟
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Shanghai Marine Diesel Engine Research Institute
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Shanghai Marine Diesel Engine Research Institute
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Priority to CN202111579508.8A priority Critical patent/CN114962099B/en
Publication of CN114962099A publication Critical patent/CN114962099A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/24—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means
    • F02M37/26—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means with water detection means
    • F02M37/28—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means with water detection means with means activated by the presence of water, e.g. alarms or means for automatic drainage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/38—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements with regeneration means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/40—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements with means for detection of clogging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/50—Filters arranged in or on fuel tanks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

The invention discloses a fuel oil pretreatment system of a high-power diesel engine, which comprises a first oil tank, a first filter, a second filter, a third filter, a cleanliness monitoring device, a first control valve, a second oil tank and a control device. The inlet of the first filter is connected to the outlet of the first oil tank; the inlet and the outlet of the second filter are respectively connected to the outlet of the first filter and the inlet of the third filter, and the second filter is an automatic backwashing filter; the cleanliness monitoring device is arranged at the outlet of the third filter; the second oil tank and the first control valve are connected in parallel at the downstream of the cleanliness monitoring device and are respectively connected to the diesel engine and the first oil tank; the control device is electrically connected with the cleanliness monitoring device, the first control valve and the second filter and is configured to control the opening degree of the first control valve and the automatic back flushing of the second filter according to the monitoring result of the cleanliness monitoring device. According to the fuel oil pretreatment system, the cleanliness of fuel oil can be effectively guaranteed.

Description

High-power diesel engine fuel oil pretreatment system
Technical Field
The invention relates to the technical field of fuel oil treatment, in particular to a fuel oil pretreatment system of a high-power diesel engine.
Background
Before the fuel oil of the marine diesel engine is used, the fuel oil is generally pretreated by a fuel oil pretreatment module, impurities are filtered, and then the fuel oil is filtered by a machine-carried fuel oil filter of the diesel engine so as to ensure the cleanliness of the fuel oil entering a fuel oil injection system of the diesel engine. With the increase of the power of the marine diesel engine, the fuel injection pressure of the fuel injection system is gradually increased, and more severe requirements are put on the cleanliness level and the water content of the fuel.
The fuel oil that the fuel oil preprocessing module of present diesel engine fuel oil system handled is difficult to satisfy the requirement of high-power diesel engine to fuel oil preprocessing cleanliness and water content, shortens the life of machine area fuel oil filter easily, and leads to the abnormal wear, the jamming etc. of precision fit mating parts in spare parts such as the high-pressure oil pump of diesel engine, sprayer easily, and then influences the reliability of diesel engine.
To this end, the present invention provides a high power diesel fuel pretreatment system to at least partially address the above-mentioned problems.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to at least partially solve the above problems, the present invention provides a fuel pretreatment system for a high-power diesel engine, comprising:
the first oil tank is used for storing fuel oil to be treated;
a first filter having an inlet connected to an outlet of the first tank;
a second filter, an inlet of the second filter being connected to an outlet of the first filter, and the second filter being an automatic backwash filter;
a third filter, an inlet of the third filter being connected to an outlet of the second filter;
the cleanliness monitoring device is arranged at the outlet of the third filter and is used for monitoring the cleanliness of the fuel oil;
a first control valve;
a second oil tank arranged downstream of the cleanliness monitoring device in parallel with the first control valve, the second oil tank being adapted to be connected to the diesel engine, the first control valve being connected to the first oil tank;
and the control device is electrically connected with the cleanliness monitoring device, the first control valve and the second filter and is configured to control the opening degree of the first control valve and the automatic backwashing of the second filter according to the monitoring result of the cleanliness monitoring device.
According to the fuel oil pretreatment system of the high-power diesel engine, after the fuel oil to be treated in the first fuel tank is sequentially filtered by the first filter, the second filter and the third filter, the cleanliness is monitored by the cleanliness monitoring device, so that the control device can control the opening degree of the first control valve which is arranged at the downstream of the cleanliness monitoring device and is connected with the first fuel tank according to the monitored cleanliness, the fuel oil with the cleanliness meeting the preset requirement can enter the second fuel tank to be used by the diesel engine, the fuel oil with the cleanliness not meeting the preset requirement is returned to the first fuel tank through the first control valve to be filtered again, the cleanliness of the fuel oil entering the engine with the fuel oil filter is ensured, the cleanliness of the fuel oil entering the fuel oil system of the diesel engine is further ensured, the safe and reliable operation of the diesel engine is ensured, and the load of the engine with the fuel oil filter is effectively reduced, the service life of the machine-carried fuel filter is prolonged; the second filter is set as an automatic back-flushing filter, so that the control device can control the automatic back-flushing of the second filter according to the monitored cleanliness, the filtering effect of the second filter is effectively guaranteed, and the cleanliness of fuel oil is further guaranteed.
Optionally, the second filter comprises a backwashing cavity and filter cavities arranged in parallel, one of the filter cavities arranged in parallel is used for filtering fuel, and the control device is configured to control the backwashing cavity to be communicated with the one of the filter cavities arranged in parallel for backwashing and control the other of the filter cavities arranged in parallel to be communicated with the first filter for filtering fuel when the monitoring result of the cleanliness monitoring device does not meet the preset requirement.
Optionally, the fuel purifier comprises a plurality of third filters arranged in parallel, one of the third filters arranged in parallel is communicated with the second filter to filter fuel, and the control device is electrically connected with the third filters arranged in parallel and is configured to control the other of the third filters arranged in parallel to be communicated with the second filter to filter fuel when the monitoring result of the cleanliness monitoring device does not meet the preset requirement.
Optionally, the device comprises the first filters arranged in parallel, one of the first filters arranged in parallel is communicated with the first oil tank to filter the fuel, and the control device is electrically connected with the first filters arranged in parallel and is configured to control the other of the first filters arranged in parallel to be communicated with the first oil tank to filter the fuel when the monitoring result of the cleanliness monitoring device does not meet the preset requirement.
Optionally, the fuel pump is arranged between the first filter and the second filter, the pressure sensor is arranged at the downstream of the cleanliness monitoring device and used for measuring the pressure of the fuel, and the control device is electrically connected with the fuel pump and the pressure sensor and configured to adjust the working pressure of the fuel pump according to the measurement result of the pressure sensor.
Optionally, the fuel tank further comprises a thermostat and a temperature sensor, the thermostat is arranged between the first filter and the second filter, the temperature sensor is arranged behind the cleanliness monitoring device and used for measuring the temperature of the fuel, and the control device is electrically connected with the thermostat and the temperature sensor and is configured to control the operation of the thermostat according to the measurement result of the temperature sensor.
Optionally, the system further comprises a first differential pressure signal transmitter, wherein the first differential pressure signal transmitter is connected to two ends of the first filter and electrically connected to the control device;
and/or the like and/or,
the filter also comprises a third differential pressure signal transmitter, wherein the third differential pressure signal transmitter is connected to two ends of the third filter and electrically connected with the control device.
Optionally, the filter further comprises a second differential pressure signal transmitter connected to two ends of the filter cavity and electrically connected to the control device.
Optionally, the third filter is an oil-water separator, a water level monitor is disposed at a lower portion of the oil-water separator, a drain valve is disposed at a bottom of the oil-water separator, and the control device is electrically connected to the water level monitor and the drain valve and configured to control an opening of the drain valve according to a monitoring result of the water level monitor.
Optionally, the fuel tank further comprises a second control valve connected between the first fuel tank and the second fuel tank and electrically connected with the control device, and the control device is configured to control the opening degree of the second control valve according to the liquid level of the second fuel tank.
Drawings
The following drawings of the invention are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
In the drawings:
FIG. 1 is a schematic diagram of a fuel pretreatment system for a high-powered diesel engine according to a preferred embodiment of the present invention; and
fig. 2 is a schematic view showing the construction of a second filter of a fuel pretreatment system for a high-powered diesel engine according to a preferred embodiment of the present invention.
Description of reference numerals:
100: high-power diesel engine fuel oil pretreatment system 110: first oil tank
111: first exhaust valve 112: first blowoff valve
120: first filter 121: first valve
122: second valve 130: second filter
131: back-flushing cavity 132 a: first filter chamber
132 b: second filter chamber 133: third valve
134: fourth valve 135: fifth valve
136: sixth valve 137: seventh valve
140: third filter 141: water level monitor
142: the drain valve 143: second exhaust valve
144: eighth valve 145: ninth valve
150: cleanliness monitoring device 161: first control valve
162: the fuel pump 163: temperature sensor
164: the thermostat 165: pressure sensor
166: first differential pressure signal generator 167: third differential pressure signal transmitter
168: second differential pressure transmitter 171: second oil tank
172: dirty oil tank 173: third exhaust valve
174: second blowoff valve 175: third control valve
176: second control valve 177: fourth control valve
178: fifth control valve 180: control device
190: flow meter
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
In the following description, for purposes of explanation, specific details are set forth in order to provide a thorough understanding of the present invention. It is apparent that the practice of the invention is not limited to the specific details set forth herein as are known to those of skill in the art. The following detailed description of the preferred embodiments of the present invention, however, the present invention may have other embodiments in addition to the detailed description, and should not be construed as being limited to the embodiments set forth herein.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, as the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. When the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The terms "upper", "lower", "front", "rear", "left", "right" and the like as used herein are for purposes of illustration only and are not limiting.
Ordinal words such as "first" and "second" are referred to herein merely as labels, and do not have any other meaning, such as a particular order, etc. Also, for example, the term "first component" does not itself imply the presence of "second component", and the term "second component" does not itself imply the presence of "first component".
In the following, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings, which illustrate representative embodiments of the invention and do not limit the invention.
Referring to fig. 1, a high-powered diesel fuel pretreatment system 100 according to a preferred embodiment of the present invention includes a first tank 110, a first filter 120, a second filter 130, a third filter 140, a cleanliness monitoring device 150, a first control valve 161, a second tank 171, and a control device 180. It should be noted that the high-power diesel engine referred to in the present application generally refers to a diesel engine with a single cylinder power of 200KW or more.
The first tank 110 is used to store fuel to be treated. The size of the first tank 110 may be determined according to the arrangement space of the hold. A first exhaust valve 111 is provided on the top of the first tank 110. When the first exhaust valve 111 is opened, the first oil tank 110 can communicate with the outside to exhaust air in the first oil tank 110, and the pressure in the first oil tank 110 is ensured to be stable.
The first oil tank 110 may perform a certain precipitation filtering function on moisture and impurities in the fuel to be treated stored therein, and thus a first drain valve 112 is provided at the bottom of the first oil tank 110. When the first soil discharge valve 112 is opened, the precipitated impurities can be discharged out of the first oil tank 110.
The first filter 120 is disposed downstream of the first oil tank 110. It should be noted that the downstream is referred to in the present application as the direction of fuel flow. The inlet of the first filter 120 is connected to the outlet of the first tank 110 so that the fuel to be treated in the first tank 110 can enter the first filter 120 for filtering.
The first filter 120 may be configured as a 100-mesh filter to filter particles with larger sizes in the fuel, such as impurity particles with diameters larger than 150um, so as to ensure safe operation of other devices disposed downstream of the first filter 120, and thus ensure safe operation of the high-power diesel fuel pretreatment system 100.
In order to effectively ensure stable and efficient operation of the high-powered diesel fuel pretreatment system 100, the high-powered diesel fuel pretreatment system 100 preferably includes the first filters 120 arranged in parallel, and as in the embodiment shown in fig. 1, two first filters 120 are arranged in parallel.
One of the first filters 120 disposed in parallel communicates with the first tank 110 to filter the fuel flowing from the first tank 110 to the first filter 120. That is, the high-powered diesel fuel pretreatment system 100, during operation, one of the two first filters 120, which are disposed in parallel as shown in fig. 1, communicates with the first tank 110 to filter the fuel flowing therethrough.
When the usage time of the first filter 120 communicated with the first tank 110 reaches a replacement period, another one of the first filters 120 arranged in parallel can communicate with the first tank 110 to filter the fuel. At this point, the operator may perform a replacement operation on the first filter 120 that has reached the replacement cycle.
To facilitate switching between the first filters 120 arranged in parallel, a first valve 121 may be provided upstream of an inlet of the first filter 120 arranged in parallel, the first valve 121 may be a three-way valve, a second valve 122 may be provided downstream of an outlet of the first filter 120 arranged in parallel, the second valve 122 may be a three-way valve, and the first filter 120 may be conveniently switched by switching the outlets of the first valve 121 and the second valve 122.
In order to realize the automatic switching between the first filters 120 arranged in parallel, and effectively ensure the continuous and stable operation of the high-power diesel fuel pretreatment system 100, the first valve 121, the second valve 122 and the first filter 120 arranged in parallel are preferably electrically connected with the control device 180, and the control device 180 can switch the outlets of the first valve 121 and the second valve 122 according to the service time of the first filter 120 so as to automatically switch the first filter 120.
A first differential pressure signal transmitter 166 is preferably connected across the first filters 120 arranged in parallel, and the first differential pressure signal transmitter 166 is preferably electrically connected to the control device 180. The first differential pressure transmitter 166 can measure the differential pressure across the first filter 120 being used, and can compare the measured differential pressure value with a preset differential pressure value to determine whether the first filter 120 being used is clogged, that is, determine whether the first filter 120 being used is out of order or whether the usage time reaches a replacement cycle, and transmit a signal indicating that the first filter 120 being used is clogged when the measured differential pressure value reaches the preset differential pressure value. The control means 180 can control the other unused first filter 120 of the first filters 120 arranged in parallel to communicate with the first tank 110 according to the signal to continue filtering the fuel.
Furthermore, the control device 180 can also be electrically connected to a cleanliness monitoring device 150 for monitoring fuel cleanliness, which will be described later, and can automatically switch the first filter 120 disposed in parallel according to the monitoring result of the cleanliness monitoring device 150.
Specifically, when the cleanliness of the fuel monitored by the cleanliness monitoring device 150 does not meet a predetermined requirement, such as the requirement of the fuel cleanliness related standard ISO4406-1999_14/12/10, indicating that the first filter 120 in use may be out of order, or the usage time has reached the replacement cycle, the control device 180 can control the other one of the first filters 120 arranged in parallel to communicate with the first tank 110, that is, control the unused one of the first filters 120 arranged in parallel to communicate with the first tank 110, so as to continue to filter the fuel. The specific switching can be realized by switching the outlets of the first valve 121 and the second valve 122 by the control device 180.
That is, the control device 180 can automatically switch the first filter 120 connected in parallel to the first oil tank 110 according to the signal sent by the first differential pressure transmitter 166 and/or the result that the fuel cleanliness monitored by the cleanliness monitoring device 150 does not meet the predetermined requirement, so as to filter the fuel, thereby effectively ensuring the stable and continuous operation of the high-power diesel fuel pretreatment system 100.
The inlet of the second filter 130 is connected to the outlet of the first filter 120 so that fuel exiting the first filter 120 can enter the second filter 130 for further filtering. The filtering precision of the second filter 130 is higher than that of the first filter 120, and the specific filtering precision can be 1um, so as to filter various abnormal impurities such as smaller particulate matters in the fuel oil, and ensure that the cleanliness of the filtered fuel oil meets the predetermined requirement.
The second filter 130 is preferably configured as an automatic backwashing filter, and the second filter 130 is preferably electrically connected to the control device 180 so that the control device 180 can control the automatic backwashing of the second filter 130 according to the monitoring result of the cleanliness monitoring device 150.
Referring specifically to fig. 2, the second filter 130 may include a backwash chamber 131 and filter chambers arranged in parallel. In the embodiment shown in fig. 2, two filter cavities, a first filter cavity 132a and a second filter cavity 132b, are arranged in parallel.
One of the filter chambers arranged in parallel is used for filtering fuel. That is, the high-capacity diesel fuel pretreatment system 100, during operation, one of the first filter chamber 132a and the second filter chamber 132b, which are disposed in parallel as shown in fig. 2, communicates with the first filter 120 being used to filter the fuel flowing therethrough.
When the cleanliness of the fuel monitored by the cleanliness monitoring device 150 does not meet a predetermined requirement, such as the requirement of the fuel cleanliness-related standard ISO4406-1999_14/12/10, which indicates that the first filter chamber 132a or the second filter chamber 132b in use may be out of order, or the time of use has reached the rinsing cycle, the control device 180 can control the backwashing chamber 131 to communicate with one of the filter chambers arranged in parallel for backwashing, that is, control the first filter chamber 132a or the second filter chamber 132b in use to communicate with the backwashing chamber 131 for backwashing, and control the other of the filter chambers arranged in parallel to communicate with the first filter 120, that is, control the unused one of the first filter chamber 132a and the second filter chamber 132b to communicate with the first filter 120 for further fuel filtration, effectively ensuring the stable and continuous operation of the fuel oil pretreatment system 100 of the high-power diesel engine.
To facilitate automatic switching between the first filter chamber 132a and the second filter chamber 132b arranged in parallel, a third valve 133 may be disposed upstream of the inlets of the first filter chamber 132a and the second filter chamber 132b arranged in parallel, the third valve 133 may be a three-way valve and electrically connected to the control device 180, a fourth valve 134 may be disposed downstream of the outlets of the first filter chamber 132a and the second filter chamber 132b arranged in parallel, the fourth valve 134 may be a three-way valve and electrically connected to the control device 180, and the outlets of the third valve 133 and the fourth valve 134 may be switched by the control device 180, so that the first filter chamber 132a and the second filter chamber 132b may be automatically switched conveniently.
In order to facilitate the communication between the backwash chamber 131 and the first filter chamber 132a or the second filter chamber 132b for backwash, a fifth valve 135 is disposed at the upstream of the backwash chamber 131, a sixth valve 136 and a seventh valve 137 are disposed inside the backwash chamber 131, the sixth valve 136 and the seventh valve 137 may be three-way valves, the fifth valve 135, the sixth valve 136 and the seventh valve 137 are all electrically connected to the control device 180, the opening degree of the fifth valve 135 is controlled by the control device 180, and the outlets of the sixth valve 136 and the seventh valve 137 are switched, so that the backwash chamber 131 and the first filter chamber 132a or the second filter chamber 132b can be conveniently communicated for backwash.
Backwash chamber 131 is preferably disposed in parallel with first filter chamber 132a and second filter chamber 132b and between first filter chamber 132a and second filter chamber 132b to effectively shorten the backwash path.
The automatic backwash process of second filter 130 will be described in detail below using first filter chamber 132a as an example of the filter chamber being used.
Specifically, during operation of the high capacity diesel fuel pretreatment system 100, fuel exiting the outlet of the first filter 120 being used is filtered through the first filter cavity 132a and exits the second filter 130 according to the flow path shown by ABCDG in fig. 2.
When the cleanliness of the fuel monitored by the cleanliness monitoring device 150 does not meet a predetermined requirement, the control device 180 switches the outlets of the third valve 133 and the fourth valve 134 so that the fuel flowing out of the outlet of the first filter 120 in use flows out of the second filter 130 after being filtered through the second filter chamber 132b according to the flow path shown by ABEFG in fig. 2.
At the same time, control unit 180 controls fifth valve 135 to open and switches the outlets of sixth valve 136 and seventh valve 137 such that a portion of the fuel flowing from the outlet of first filter 120 in use flows through first filter cavity 132a according to the flow path shown by AHILMN in FIG. 2 to back flush first filter cavity 132 a.
When the second filter chamber 132b reaches a backwash cycle requiring backwash, the control means 180 again switches the outlets of the third valve 133 and the fourth valve 134 so that the fuel exiting the outlet of the first filter 120 in use is filtered through the first filter chamber 132a and exits the second filter 130 according to the flow path shown by ABCDG in figure 2.
At the same time, control device 180 controls fifth valve 135 to open and switches the outlets of sixth valve 136 and seventh valve 137 so that a portion of the fuel flowing from the outlet of first filter 120 being used flows through second filter chamber 132b according to the flow path shown by AHIJKN in fig. 2 to back flush second filter chamber 132 b.
The pressure of the backflushed fuel may be regulated by a fuel pump 162 as will be described hereinafter. The specific backwashing fuel pressure and the backwashing time can be set according to the requirement. The backflushed sump oil may flow from the backflush chamber 131 into the sump oil tank 172.
It should be noted that fig. 2 only schematically illustrates the principle of the back flushing, and the specific flowing direction of the fuel in the first filter cavity 132a and the second filter cavity 132b during the back flushing, the communication mode of the back flushing cavity 131 with the first filter cavity 132a and the second filter cavity 132b, and the design of the internal flow passage can be set according to actual requirements.
A second differential pressure signal transmitter 168 is preferably connected across the filter cavity and the second differential pressure signal transmitter 168 is preferably electrically connected to the control device 180. The second differential pressure transmitter 168 can measure the differential pressure across the first filter chamber 132a or the second filter chamber 132b being used, and can compare the measured differential pressure value with a predetermined differential pressure value to determine whether the first filter chamber 132a or the second filter chamber 132b being used is clogged, i.e., determine whether the first filter chamber 132a or the second filter chamber 132b being used is malfunctioning or the usage time reaches a backwash cycle, and transmit a signal indicating that the first filter chamber 132a or the second filter chamber 132b being used is clogged when the measured differential pressure value reaches the predetermined differential pressure value. The control means 180 is capable of controlling the unused one of the first and second filter chambers 132a, 132b to communicate with the first filter 120 in response to the signal to continue filtering the fuel.
In addition, the pressure differential measured by second differential pressure signal 168 can also be used to determine the progress of backwash by first filter chamber 132a or second filter chamber 132b and can signal the end of backwash when first filter chamber 132a or second filter chamber 132b is finished.
The inlet of the third filter 140 is connected to the outlet of the second filter 130 so that fuel exiting the second filter 130 can enter the third filter 140 for further filtering.
The third filter 140 may be an oil-water separator to separate water from the fuel while filtering impurities in the fuel, so as to prevent the water from entering a diesel engine fuel system along with the fuel and causing corrosion and damage to precision parts of a high-pressure oil pump, a fuel injector and the like of the diesel engine.
A drain valve 142 is preferably provided at the bottom of the oil-water separator, and accumulated water in the oil-water separator can be drained through the drain valve 142.
In order to automatically drain the accumulated water in the oil-water separator in time, a water level monitor 141 is preferably disposed at a lower portion of the oil-water separator, and the water level monitor 141 and the drain valve 142 are electrically connected to a control device 180, and the control device 180 can control an opening degree of the drain valve 142 according to a monitoring result of the water level monitor 141. If the water level in the oil-water separator monitored by the water level monitor 141 reaches a preset water level, the control device 180 controls the drain valve 142 to be opened to drain accumulated water; when the water level in the oil-water separator monitored by the water level monitor 141 does not reach the preset water level, the control device 180 controls the drain valve 142 to close.
A second discharge valve 143 is preferably provided on the top of the third filter 140. When the second exhaust valve 143 is opened, the third filter 140 can communicate with the outside to exhaust air in the third filter 140, so as to ensure that the pressure in the third filter 140 is stable.
The second exhaust valve 143 is preferably electrically connected to the control device 180, so that the control device 180 can automatically control the second exhaust valve 143 to open or close periodically or according to the amount of air in the third filter 140 to automatically exhaust, thereby reducing the workload of manual air bleeding of an operator and the risk that the manual air bleeding may bring, and effectively avoiding the situation that when the high-power diesel fuel pretreatment system 100 is restarted after troubleshooting, maintenance or shutdown for a period of time, the operator forgets to manually exhaust the air, so that system parts are damaged or even the system fails to start.
Likewise, to effectively ensure stable and efficient operation of the high-powered diesel fuel pretreatment system 100, the high-powered diesel fuel pretreatment system 100 preferably includes a third filter 140 disposed in parallel, such as two third filters 140 disposed in parallel in the embodiment shown in fig. 1.
One of the third filters 140 disposed in parallel communicates with the second filter 130 to filter the fuel. That is, the high-powered diesel fuel pretreatment system 100, during operation, one of the two third filters 140, which are disposed in parallel as shown in fig. 1, communicates with the second filter 130 to filter the fuel flowing therethrough.
When the usage time of the third filter 140 communicating with the second filter 130 reaches a replacement period, another one of the third filters 140 disposed in parallel can communicate with the second filter 130 to filter the fuel. At this point, the operator may perform a replacement operation on the third filter 140 that has reached the replacement cycle.
To facilitate switching between the third filters 140 arranged in parallel, an eighth valve 144 may be provided upstream of the inlet of the third filter 140 arranged in parallel, the eighth valve 144 may be a three-way valve, a ninth valve 145 may be provided downstream of the outlet of the third filter 140 arranged in parallel, the ninth valve 145 may be a three-way valve, and the third filter 140 may be conveniently switched by switching the outlets of the eighth valve 144 and the ninth valve 145.
In order to realize the automatic switching between the third filters 140 arranged in parallel and effectively ensure the continuous and stable operation of the high-power diesel fuel pretreatment system 100, the eighth valve 144, the ninth valve 145 and the third filter 140 arranged in parallel are preferably electrically connected with the control device 180, and the control device 180 can switch the outlets of the eighth valve 144 and the ninth valve 145 according to the service time of the third filter 140 so as to automatically switch the third filter 140.
A third differential pressure transmitter 167 is preferably connected across the third filter 140 arranged in parallel, and the third differential pressure transmitter 167 is preferably electrically connected to the control device 180. The third differential pressure transmitter 167 can measure the differential pressure across both ends of the third filter 140 being used, and can compare the measured differential pressure value with a preset differential pressure value to determine whether the third filter 140 being used is clogged, that is, determine whether the third filter 140 being used is out of order or whether the usage time reaches the replacement cycle, and transmit a signal indicating that the third filter 140 being used is clogged when the measured differential pressure value reaches the preset differential pressure value. The control means 180 can control another unused third filter 140 of the third filters 140 disposed in parallel to communicate with the second filter 130 according to the signal to continue filtering the fuel.
Furthermore, the control device 180 can also be electrically connected to a cleanliness monitoring device 150 for monitoring fuel cleanliness, which will be described later, and can automatically switch the third filter 140 disposed in parallel according to the monitoring result of the cleanliness monitoring device 150.
Specifically, when the cleanliness of the fuel monitored by the cleanliness monitoring means 150 does not meet a predetermined requirement, such as the requirement of the fuel cleanliness-related standard ISO4406-1999_14/12/10, indicating that the third filter 140 being used may be out of order, or the usage time has reached the replacement cycle, the control means 180 can control the other of the third filters 140 arranged in parallel to communicate with the second filter 130, that is, control the unused third filter 140 of the third filters 140 arranged in parallel to communicate with the second filter 130, so as to continue to filter the fuel. The specific switching can be realized by switching the outlets of the eighth valve 144 and the ninth valve 145 by the control device 180.
That is, the control device 180 can automatically switch the third filter 140 connected in parallel to the second filter 130 according to the signal sent by the third differential pressure transmitter 167 and/or the result that the fuel cleanliness monitored by the cleanliness monitoring device 150 does not meet the predetermined requirement, so as to filter the fuel, thereby effectively ensuring the stable and continuous operation of the high-power diesel fuel pretreatment system 100.
A cleanliness monitoring device 150 is provided at the outlet of the third filter 140 for monitoring the cleanliness of the fuel. The cleanliness monitoring device 150 may be specifically a particle counter to monitor the concentration of particulate matter such as impurities in the fuel oil.
The cleanliness monitoring device 150 can be electrically connected with the control device 180 to transmit data on the monitored cleanliness of the fuel to the control device 180, so that the control device 180 can control switching of the first filter 120 and/or the third filter 140, automatic backwashing of the second filter 130, and the like according to the monitored results. The specific control is as described above and will not be described herein.
A second oil tank 171 and the first control valve 161 are disposed in parallel downstream of the cleanliness monitoring device 150.
The second oil tank 171 is for connection to a diesel engine, storing and supplying fuel to the diesel engine with cleanliness meeting predetermined requirements. The size of the second oil tank 171 can be determined according to the oil consumption index of the diesel engine, and generally can store the oil consumption which meets the requirement of normal operation of the diesel engine for 8 hours under the rated working condition.
Preferably, a second control valve 176 is connected between the first tank 110 and the second tank 171, and the second control valve 176 is electrically connected to a control device 180, and the control device 180 can control the opening degree of the second control valve 176 according to the liquid level of the second tank 171. When the fuel level in the second fuel tank 171 is higher than the preset level, the control device 180 controls the second control valve 176 to open, so that part of the fuel in the second fuel tank 171 flows into the first fuel tank 110 through the second control valve 176, and the stability of the fuel pressure in the second fuel tank 171 is ensured. When the fuel level in the second tank 171 is not higher than the preset level, the control device 180 controls the second control valve 176 to close.
A third exhaust valve 173 is provided at the top of the second oil tank 171. When the third exhaust valve 173 is opened, the second oil tank 171 can be communicated with the outside to discharge air in the second oil tank 171, so that the pressure in the second oil tank 171 is stable, the stability of the fuel pressure supplied to the diesel engine is guaranteed, and the stable operation of the diesel engine is facilitated.
The second oil tank 171 may perform a further sedimentation filtering function on the clean fuel stored therein, and thus a second drain valve 174 is provided at the bottom of the second oil tank 171. When the second blow-down valve 174 is opened, the precipitated impurities can be discharged out of the second oil tank 171.
The first control valve 161 is connected to the first tank 110 and electrically connected to the control device 180. The control device 180 can control the opening degree of the first control valve 161 according to the monitoring result of the cleanliness monitoring device 150, so that fuel with cleanliness meeting the predetermined requirement (such as fuel meeting the requirement of the fuel cleanliness related standard ISO4406-1999_ 14/12/10) enters the second fuel tank 171 for use by the diesel engine, fuel with cleanliness not meeting the predetermined requirement returns to the first fuel tank 110 through the first control valve 161 for filtration again, the cleanliness of the fuel entering the onboard fuel filter of the diesel engine is ensured, the fuel cleanliness of the fuel system entering the diesel engine is further ensured, the safe and reliable operation of the diesel engine is ensured, the load of the onboard fuel filter is effectively reduced, and the service life of the onboard fuel filter is prolonged.
Specifically, when the cleanliness of the fuel filtered by the third filter 140, which is monitored by the cleanliness monitoring device 150, meets a predetermined requirement, the control device 180 controls the first control valve 161 to close so that the fuel enters the second tank 171. When the cleanliness of the fuel filtered by the third filter 140, which is monitored by the cleanliness monitoring device 150, does not meet a predetermined requirement, the control device 180 controls the first control valve 161 to open so that the fuel is returned to the first fuel tank 110 through the first control valve 161 to be filtered again.
Preferably, a third control valve 175 is provided upstream of the second oil tank 171, and the third control valve 175 is preferably electrically connected to the control device 180, and when the cleanliness of the fuel filtered by the third filter 140, which is monitored by the cleanliness monitoring device 150, does not meet a predetermined requirement, the control device 180 can control the third control valve 175 to close when controlling the first control valve 161 to open, so as to completely automatically achieve the switching of the flow direction of the fuel whose cleanliness does not meet the predetermined requirement.
To provide fuel to the diesel engine that meets certain pressure requirements and to facilitate the flow of fuel within the high power diesel fuel pretreatment system 100, a fuel pump 162 is preferably provided to pump and pressurize the fuel.
In the embodiment shown in FIG. 1, the fuel pump 162 is disposed between the first filter 120 and the second filter 130. The operating pressure of the fuel pump 162 may be adjusted by a fourth control valve 177 connected across the fuel pump 162.
Further, a pressure sensor 165 is provided downstream of the cleanliness monitoring device 150, and the pressure sensor 165 is preferably electrically connected to the control device 180 to measure the pressure of the fuel filtered by the third filter 140 and transmit the measurement result to the control device 180.
The control device 180 is preferably electrically connected to the fuel pump 162 to adjust the operating pressure of the fuel pump 162 based on the measurement of the pressure sensor 165. The specific adjustment may be achieved by controlling the opening degree of the fourth control valve 177.
In order to reduce the viscosity of the fuel and ensure smooth and stable flow of the fuel in the high-power diesel fuel pretreatment system 100, a thermostat 164 is preferably provided to maintain the temperature of the fuel within a suitable range, such as a temperature range of 20 ℃ to 40 ℃.
In the embodiment shown in fig. 1, the thermostat 164 is disposed between the first filter 120 and the second filter 130, and in particular between the fuel pump 162 and the second filter 130. The flow rate of the coolant flowing through the thermostat 164 may be adjusted by a fifth control valve 178.
Further, a temperature sensor 163 is provided downstream of the cleanliness monitoring device 150, and the temperature sensor 163 is preferably electrically connected to the control device 180 to measure the temperature of the fuel filtered by the third filter 140 and transmit the measurement result to the control device 180.
The control device 180 is preferably electrically connected to the thermostat 164, and in particular may be electrically connected to the fifth control valve 178, so as to adjust the opening degree of the fifth control valve 178, and thus the flow rate of the coolant entering the thermostat 164, based on the measurement result of the temperature sensor 163, to adjust the temperature of the fuel flowing through the thermostat 164.
Further, the control device 180 may include a display to display data related to the cleanliness of the fuel monitored by the cleanliness monitoring device 150, the pressure data of the fuel measured by the pressure sensor 165, the temperature data of the fuel measured by the temperature sensor 163, and the like in real time, so that an operator can grasp the operation condition of the high-power diesel fuel pretreatment system 100 in real time.
Preferably, the display may include a color warning module, so that when the display displays the relevant data, the display may distinguish the data meeting the predetermined requirement from the data not meeting the predetermined requirement by color. For example, when the data related to the cleanliness is displayed, the data meeting the predetermined cleanliness requirement can be displayed in green, and the data not meeting the predetermined cleanliness requirement can be displayed in red in a flashing manner, so that an operator can be prompted to check the high-power diesel engine fuel pretreatment system 100 and remove the fault.
Further, a flow meter 190 is provided downstream of the first filter 120 to measure the flow rate of the fuel passing through the high power diesel fuel pretreatment system 100.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "part," "member," and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that many variations and modifications may be made in accordance with the teaching of the present invention, which variations and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A high-power diesel engine fuel oil pretreatment system is characterized by comprising:
the first oil tank is used for storing fuel oil to be treated;
a first filter having an inlet connected to an outlet of the first tank;
a second filter, an inlet of the second filter being connected to an outlet of the first filter, and the second filter being an automatic backwash filter;
a third filter, an inlet of the third filter being connected to an outlet of the second filter;
the cleanliness monitoring device is arranged at the outlet of the third filter and is used for monitoring the cleanliness of the fuel oil;
a first control valve;
a second oil tank arranged downstream of the cleanliness monitoring device in parallel with the first control valve, the second oil tank being adapted to be connected to the diesel engine, the first control valve being connected to the first oil tank;
and the control device is electrically connected with the cleanliness monitoring device, the first control valve and the second filter and is configured to control the opening degree of the first control valve and the automatic backwashing of the second filter according to the monitoring result of the cleanliness monitoring device.
2. The high power diesel fuel pretreatment system of claim 1, wherein the second filter comprises a backwash chamber and filter chambers arranged in parallel, one of the filter chambers arranged in parallel is used for filtering fuel, and the control device is configured to control the backwash chamber to communicate with the one of the filter chambers arranged in parallel for backwash and control the other of the filter chambers arranged in parallel to communicate with the first filter for filtering fuel when the monitoring result of the cleanliness monitoring device does not meet a predetermined requirement.
3. The high power diesel fuel pretreatment system according to claim 1, comprising said third filters arranged in parallel, one of said third filters arranged in parallel being in communication with said second filter to filter fuel, said control means being electrically connected to said third filters arranged in parallel and configured to control the other of said third filters arranged in parallel to be in communication with said second filter to filter fuel when the result of monitoring by said cleanliness monitoring means does not meet a predetermined requirement.
4. The high power diesel fuel pretreatment system according to claim 1, comprising said first filters arranged in parallel, one of said first filters arranged in parallel being communicated with said first tank to filter fuel, said control means being electrically connected to said first filters arranged in parallel and configured to control the other of said first filters arranged in parallel to be communicated with said first tank to filter fuel when the result of monitoring by said cleanliness monitoring means does not meet a predetermined requirement.
5. The high power diesel fuel pretreatment system according to any one of claims 1 to 4, further comprising a fuel pump disposed between said first filter and said second filter, and a pressure sensor disposed downstream of said cleanliness monitoring device for measuring a pressure of the fuel, wherein said control device is electrically connected to said fuel pump and said pressure sensor, and is configured to adjust an operating pressure of said fuel pump according to a measurement result of said pressure sensor.
6. The high power diesel fuel pretreatment system according to any one of claims 1 to 4, further comprising a thermostat and a temperature sensor, wherein the thermostat is disposed between the first filter and the second filter, the temperature sensor is disposed behind the cleanliness monitoring means for measuring a temperature of the fuel, and the control means is electrically connected to the thermostat and the temperature sensor and configured to control an operation of the thermostat based on a measurement result of the temperature sensor.
7. The fuel pretreatment system of the high-power diesel engine according to claim 1, further comprising a first differential pressure transmitter connected to both ends of the first filter and electrically connected to the control device;
and/or the like and/or,
the filter also comprises a third differential pressure signal transmitter, wherein the third differential pressure signal transmitter is connected to two ends of the third filter and electrically connected with the control device.
8. The fuel pretreatment system for a high-power diesel engine according to claim 2, further comprising a second differential pressure transmitter connected to both ends of said filter chamber and electrically connected to said control device.
9. The fuel oil pretreatment system of the high-power diesel engine according to claim 1, wherein the third filter is an oil-water separator, a water level monitor is disposed at a lower portion of the oil-water separator, a drain valve is disposed at a bottom of the oil-water separator, and the control device is electrically connected to the water level monitor and the drain valve and configured to control an opening degree of the drain valve according to a monitoring result of the water level monitor.
10. The high power diesel fuel pretreatment system of claim 1, further comprising a second control valve connected between the first tank and the second tank and electrically connected to the control device, wherein the control device is configured to control an opening degree of the second control valve according to a liquid level of the second tank.
CN202111579508.8A 2021-12-22 2021-12-22 Fuel pretreatment system of high-power diesel engine Active CN114962099B (en)

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