CN113788135A - Power supply disconnection and unhooking protection body system of desulfurization system for ship - Google Patents
Power supply disconnection and unhooking protection body system of desulfurization system for ship Download PDFInfo
- Publication number
- CN113788135A CN113788135A CN202110941095.7A CN202110941095A CN113788135A CN 113788135 A CN113788135 A CN 113788135A CN 202110941095 A CN202110941095 A CN 202110941095A CN 113788135 A CN113788135 A CN 113788135A
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- CN
- China
- Prior art keywords
- desulfurization
- water pump
- water level
- tower body
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 86
- 230000023556 desulfurization Effects 0.000 title claims abstract description 86
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 132
- 238000005406 washing Methods 0.000 claims abstract description 47
- 239000000523 sample Substances 0.000 claims abstract description 19
- 230000009471 action Effects 0.000 claims abstract description 10
- 230000001012 protector Effects 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 5
- 230000003009 desulfurizing effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J4/00—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for
- B63J4/006—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for for treating waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/346—Controlling the process
Abstract
The invention discloses a power supply disconnection and unhooking protection body system of a desulfurization system for ships, which comprises: a desulfurization tower body; washing the water pump; outboard drainage lines; a desulfurization control unit; and a main power distribution system; the water outlet end of the washing water pump is communicated with the water inlet end of the desulfurization tower body, the washing water pump is electrically connected with the main power distribution system, and the water inlet end of the outboard drainage pipeline is communicated with the water outlet end of the desulfurization tower body. According to the invention, the water level condition in the desulfurization tower body is detected in real time, once the water level reaches or exceeds the warning water level, the high water level probe continuously sends a signal to the desulfurization control unit, the signal is sent to the main power distribution system after being processed by the desulfurization control unit, the main power distribution system sends an action command to the tripping protection module after being identified, so that a power supply circuit of the washing water pump is disconnected, the washing water pump stops working, water is not supplied into the desulfurization tower body any more, and the washing water pump is restarted for desulfurization operation after the fault is checked and repaired and the water level is lower than the warning water level.
Description
Technical Field
The invention relates to the field of ships, in particular to a power supply disconnection and unhooking protection body system of a desulfurization system for a ship.
Background
Along with more and more boats and ships of installing desulfurization system additional in recent years, shipowner also has higher and higher to system's functional requirement, the work safety design requirement to desulfurization system is more and more strict, one of them electric automatic safety protection leads to the waste water too late to discharge when the waste water in the sulphur tower too late to discharge outboard water GRE pipeline and appears blockking up or certain valve in the pipeline is not opened etc. the condition, lead to the waste water level in the tower to rise unusually, and then increase the burden for desulfurization system, influence equipment operation safety, if can not in time take measures to the washing water pump, will lead to overflowing of water in the desulfurizing tower, influence boats and ships safety.
Disclosure of Invention
The invention aims to provide a power supply disconnection and unhooking protective body system of a desulfurization system for a ship, which aims to solve the technical problem that measures cannot be taken for a washing water pump in time.
In order to achieve the purpose, the invention provides the following technical scheme:
a power supply disconnection and disconnection protector system for a desulfurization system for a ship, comprising:
a desulfurization tower body;
washing the water pump;
outboard drainage lines;
a desulfurization control unit;
and a main power distribution system;
the water outlet end of the washing water pump is communicated with the water inlet end of the desulfurization tower body, the washing water pump is electrically connected with the main power distribution system, the water inlet end of the outboard drainage pipeline is communicated with the water outlet end of the desulfurization tower body, and the signal output end of the desulfurization control unit is electrically connected with the signal input end of the main power distribution system;
the device also comprises a high water level probe, a signal output end of the high water level probe is electrically connected with a signal input end of the desulfurization control unit, and the high water level probe is used for detecting whether the water level in the desulfurization tower body reaches the warning water level or not;
the high-water-level probe detects that the water level in the desulfurization tower body reaches or exceeds a warning water level, the main power distribution system sends an action signal to the tripping protection module so as to disconnect the washing water pump power supply circuit.
Furthermore, valve bodies are arranged on a water supply pipeline between the washing water pump and the desulfurization tower body and an outboard water drainage pipeline.
Further, the tripping protection module is an under-voltage tripping protection module.
Further, the tripping protection module comprises a first relay and an undervoltage tripping coil, the input end of the first relay is electrically connected with the switching value signal output end of the desulfurization control unit, and the undervoltage tripping coil is used for controlling the actuation or separation of the armature of the first relay so as to realize the opening or closing of the first relay.
Further, the tripping protection module is a shunt tripping protection module.
Furthermore, the tripping protection module comprises a second relay and a shunt release coil, the input end of the second relay is electrically connected with the switching value signal output end of the desulfurization control unit, and the shunt release coil is used for controlling the actuation or separation of the armature of the second relay so as to open or close the first relay.
Furthermore, the tripping protection module is positioned on a frequency converter power switch of the washing water pump.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the high water level probe is arranged on the desulfurization tower body to detect the water level condition in the desulfurization tower body in real time, once the water level reaches or exceeds the warning water level, the high water level probe continuously sends a signal to the desulfurization control unit, the signal is sent to the main power distribution system after being processed by the desulfurization control unit, and the main power distribution system sends an action command to the tripping protection module after being identified, so that a washing water pump power supply circuit is disconnected, the washing water pump stops working and does not supply water into the desulfurization tower body any more, and the washing water pump is restarted to perform desulfurization operation after faults are checked and repaired and the water level is lower than the warning water level.
Drawings
FIG. 1 is a diagram showing the overall connection of a power cut-off and unhook protector system for a desulfurization system for a ship;
fig. 2 is a schematic structural diagram of a trip protection module according to a first embodiment;
fig. 3 is a schematic structural diagram of the trip protection module according to the second embodiment.
In the figure: 1. a desulfurization tower body; 2. washing the water pump; 3. outboard drainage lines; 4. a desulfurization control unit; 5. a main power distribution system; 6. a high water level probe; 7. a tripping protection module; 8. a valve body; KA1, a first relay; SH1, undervoltage coil; KA2, a second relay; SH2, shunt opening coil.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides the following technical solutions:
a power supply disconnection and disconnection protector system for a desulfurization system for a ship, comprising:
a desulfurization tower body 1;
a washing water pump 2;
a outboard water discharge pipe line 3;
a desulfurization control unit 4;
and a main power distribution system 5;
the water outlet end of the washing water pump 2 is communicated with the water inlet end of the desulfurization tower body 1, the washing water pump 2 is electrically connected with the main power distribution system 5, the water inlet end of the outboard water discharge pipeline 3 is communicated with the water outlet end of the desulfurization tower body 1, and the signal output end of the desulfurization control unit 4 is electrically connected with the signal input end of the main power distribution system 5;
the desulfurization tower further comprises a high water level probe 6 for detecting whether the water level in the desulfurization tower body 1 reaches a warning water level, wherein the signal output end of the high water level probe 6 is electrically connected with the signal input end of the desulfurization control unit 4;
the device also comprises a tripping protection module 7 which is used for controlling the power supply circuit of the washing water pump 2 to be switched on or off, when the high water level probe 6 detects that the water level in the desulfurization tower body 1 reaches or exceeds the warning water level, the main power distribution system 5 sends an action signal to the tripping protection module 7 so as to switch off the power supply circuit of the washing water pump 2.
In this scheme, through set up high water level probe 6 on desulfurizing tower body 1, with the inside water level condition of real-time detection desulfurizing tower body 1, in case when the water level appears and reaches or surpasss the alert water level, high water level probe 6 will continuously send a signal for desulfurization control unit 4, send for main distribution system 5 after desulfurization control unit 4 handles, main distribution system 5 discernment back, send the action order for dropout protection module 7, thereby break off washing water pump 2 supply circuit, so that washing water pump 2 stop work, no longer supply water in to desulfurizing tower body 1, after waiting to investigate and repair the trouble, and when the water level is less than the alert water level, restart washing water pump 2 carries out the desulfurization operation again.
In addition, all be equipped with valve body 8 on the water supply pipeline between washing water pump 2 and the desulfurization tower body 1 and the outboard drainage pipeline 3 for regulation and control is intake and is gone out water, makes the relative stable water level of possessing in the desulfurization tower body 1.
In addition, the trip protection module 7 is preferably mounted on an inverter power switch of the washing water pump 2.
In order to facilitate understanding of the technical aspects of the present invention, the following examples are specifically illustrated.
The first embodiment is as follows:
a power supply disconnection and disconnection protector system for a desulfurization system for a ship, comprising:
a desulfurization tower body 1;
a washing water pump 2;
a outboard water discharge pipe line 3;
a desulfurization control unit 4;
and a main power distribution system 5;
the water outlet end of the washing water pump 2 is communicated with the water inlet end of the desulfurization tower body 1, the washing water pump 2 is electrically connected with the main power distribution system 5, the water inlet end of the outboard water discharge pipeline 3 is communicated with the water outlet end of the desulfurization tower body 1, and the signal output end of the desulfurization control unit 4 is electrically connected with the signal input end of the main power distribution system 5;
the desulfurization tower further comprises a high water level probe 6 for detecting whether the water level in the desulfurization tower body 1 reaches a warning water level, wherein the signal output end of the high water level probe 6 is electrically connected with the signal input end of the desulfurization control unit 4;
the device also comprises a tripping protection module 7 which is used for controlling the power supply circuit of the washing water pump 2 to be switched on or off, when the high water level probe 6 detects that the water level in the desulfurization tower body 1 reaches or exceeds the warning water level, the main power distribution system 5 sends an action signal to the tripping protection module 7 so as to switch off the power supply circuit of the washing water pump 2.
The tripping protection module 7 is an under-voltage tripping protection module.
The trip protection module 7 preferably has the following structure: including first relay KA1 and undervoltage release coil SH1, the input of first relay KA1 and the switching value signal output electric connection of desulfurization the control unit 4, undervoltage release coil SH1 is used for controlling the armature actuation or the separation of first relay KA1 to realize opening or closing of first relay KA 1.
In this embodiment, the tripping protection module 7 adopts a combination of the first relay KA1 and the undervoltage tripping coil SH1 to realize the control of the frequency converter power switch of the washing water pump 2, so that when the water level inside the desulfurization tower body 1 reaches or exceeds the warning water level, the disconnection of the power supply circuit of the washing water pump 2 is timely controlled, and the undervoltage protection of the frequency converter power switch is realized.
In addition, the trip protection module 7 is preferably mounted on an inverter power switch of the washing water pump 2.
The first relay KA1 preferably selects a 24V power supply, and the voltage of the under-voltage release coil SH1 selects the corresponding power supply.
Example two:
with the structure of embodiment one, the difference is:
the tripping protection module 7 is a shunt tripping protection module.
The trip protection module 7 preferably has the following structure: the desulfurization control device comprises a second relay KA2 and a shunt opening coil SH2, wherein the input end of the second relay KA2 is electrically connected with the switching value signal output end of the desulfurization control unit 4, and the shunt opening coil SH2 is used for controlling the armature of the second relay KA2 to attract or separate so as to realize the opening or closing of the first relay KA 1.
The tripping protection module 7 is positioned on the frequency converter power switch of the washing water pump 2 and is connected with the frequency converter power switch in series.
In this embodiment, the trip protection module 7 implements the control of the frequency converter power switch of the washing water pump 2 by combining the second relay KA2 and the shunt excitation decoupling coil SH2, so that when the water level inside the desulfurization tower body 1 reaches or exceeds the warning water level, the disconnection of the power supply circuit of the washing water pump 2 is timely controlled, the disconnection protection of the frequency converter power switch is implemented, meanwhile, the manual pressing of a button is avoided, and the condition that the coil is burnt is avoided as the shunt excitation coil is not electrified any more all the time.
In addition, the trip protection module 7 is preferably mounted on an inverter power switch of the washing water pump 2.
The second relay KA2 preferably selects a 24V power supply, and the voltage of the shunt coil SH2 selects the corresponding power supply.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which includes the appended claims and their equivalents.
Claims (7)
1. A power supply disconnection and disconnection protector system for a desulfurization system for a ship, comprising:
a desulfurization tower body (1);
a washing water pump (2);
an outboard drainage line (3);
a desulfurization control unit (4);
and a main power distribution system (5);
the play water end and the desulfurization tower body (1) of washing water pump (2) are intake and are held the intercommunication, and washing water pump (2) and main distribution system (5) electric connection, the end of intaking of outboard drainage pipe way (3) is held and is gone out water end intercommunication with desulfurization tower body (1), the signal output part of desulfurization the control unit (4) and the signal input part electric connection of main distribution system (5), its characterized in that:
the device also comprises a high water level probe (6) for detecting whether the water level in the desulfurization tower body (1) reaches a warning water level or not, wherein the signal output end of the high water level probe (6) is electrically connected with the signal input end of the desulfurization control unit (4);
the device is characterized by further comprising a tripping protection module (7) for controlling the power supply circuit of the washing water pump (2) to be disconnected or closed, when the high-water-level probe (6) detects that the water level in the desulfurization tower body (1) reaches or exceeds the warning water level, the main power distribution system (5) sends an action signal to the tripping protection module (7) to disconnect the power supply circuit of the washing water pump (2).
2. The power supply disconnection and unhooking protector system for the desulfurization system for the ship according to claim 1, wherein:
and valve bodies (8) are arranged on a water supply pipeline between the washing water pump (2) and the desulfurization tower body (1) and on the outboard drainage pipeline (3).
3. The power supply disconnection and unhooking protector system for the desulfurization system for the ship according to claim 1, wherein:
the tripping protection module (7) is an under-voltage tripping protection module.
4. The power supply disconnection and unhooking protector system for the desulfurization system for the ship according to claim 3, wherein:
the tripping protection module (7) comprises a first relay (KA1) and an undervoltage release coil (SH1), the input end of the first relay (KA1) is electrically connected with the switching value signal output end of the desulfurization control unit (4), and the undervoltage release coil (SH1) is used for controlling the armature attraction or separation of the first relay (KA1) so as to realize the opening or closing of the first relay (KA 1).
5. The power supply disconnection and unhooking protector system for the desulfurization system for the ship according to claim 1, wherein:
the tripping protection module (7) is a shunt tripping protection module.
6. The power supply disconnection and unhooking protector system for the desulfurization system for the ship according to claim 5, wherein:
the tripping protection module (7) comprises a second relay (KA2) and a shunt opening and closing coil (SH2), the input end of the second relay (KA2) is electrically connected with the switching value signal output end of the desulfurization control unit (4), and the shunt opening and closing coil (SH2) is used for controlling the armature attraction or separation of the second relay (KA2) so as to realize the opening or closing of the first relay (KA 1).
7. The power shutoff unhooking protector system for the marine desulfurization system according to claim 1, 3 or 5, wherein:
the tripping protection module (7) is positioned on a frequency converter power switch of the washing water pump (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110941095.7A CN113788135A (en) | 2021-08-17 | 2021-08-17 | Power supply disconnection and unhooking protection body system of desulfurization system for ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110941095.7A CN113788135A (en) | 2021-08-17 | 2021-08-17 | Power supply disconnection and unhooking protection body system of desulfurization system for ship |
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| Publication Number | Publication Date |
|---|---|
| CN113788135A true CN113788135A (en) | 2021-12-14 |
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|---|---|---|---|
| CN202110941095.7A Pending CN113788135A (en) | 2021-08-17 | 2021-08-17 | Power supply disconnection and unhooking protection body system of desulfurization system for ship |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102309912A (en) * | 2010-07-06 | 2012-01-11 | 同方环境股份有限公司 | Device and method for performing alkali desulfurization and dust removal on ship exhaust fume |
| EP3104444A1 (en) * | 2015-06-10 | 2016-12-14 | Honeywell International Inc. | Systems and methods for fuel desulfurization |
| CN106984161A (en) * | 2017-06-07 | 2017-07-28 | 大连海事大学 | A kind of marine exhaust pollutant and ballast water integrated conduct method and device |
| CN110127783A (en) * | 2019-05-28 | 2019-08-16 | 上海蓝魂环保科技有限公司 | A kind of ship scrubbing tower sewage-treatment plant |
| WO2019230641A1 (en) * | 2018-06-01 | 2019-12-05 | 三菱日立パワーシステムズ株式会社 | Exhaust gas purification system and operation method for exhaust gas purification system |
| CN210631910U (en) * | 2019-09-25 | 2020-05-29 | 江苏扬子鑫福造船有限公司 | Green and environment-friendly ship waste gas desulfurization cleaning system |
| CN112316721A (en) * | 2020-11-10 | 2021-02-05 | 南通中远海运川崎船舶工程有限公司 | Large-scale ship combined type desulfurization device and desulfurization method |
| CN212932605U (en) * | 2020-09-03 | 2021-04-09 | 浙江浙能迈领环境科技有限公司 | Water quality monitoring system suitable for ship desulfurization inlet and outlet |
| CN212942298U (en) * | 2020-07-01 | 2021-04-13 | 南京佳华工程技术有限公司 | Ship exhaust gas desulfurization equipment |
-
2021
- 2021-08-17 CN CN202110941095.7A patent/CN113788135A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102309912A (en) * | 2010-07-06 | 2012-01-11 | 同方环境股份有限公司 | Device and method for performing alkali desulfurization and dust removal on ship exhaust fume |
| EP3104444A1 (en) * | 2015-06-10 | 2016-12-14 | Honeywell International Inc. | Systems and methods for fuel desulfurization |
| CN106984161A (en) * | 2017-06-07 | 2017-07-28 | 大连海事大学 | A kind of marine exhaust pollutant and ballast water integrated conduct method and device |
| WO2019230641A1 (en) * | 2018-06-01 | 2019-12-05 | 三菱日立パワーシステムズ株式会社 | Exhaust gas purification system and operation method for exhaust gas purification system |
| CN110127783A (en) * | 2019-05-28 | 2019-08-16 | 上海蓝魂环保科技有限公司 | A kind of ship scrubbing tower sewage-treatment plant |
| CN210631910U (en) * | 2019-09-25 | 2020-05-29 | 江苏扬子鑫福造船有限公司 | Green and environment-friendly ship waste gas desulfurization cleaning system |
| CN212942298U (en) * | 2020-07-01 | 2021-04-13 | 南京佳华工程技术有限公司 | Ship exhaust gas desulfurization equipment |
| CN212932605U (en) * | 2020-09-03 | 2021-04-09 | 浙江浙能迈领环境科技有限公司 | Water quality monitoring system suitable for ship desulfurization inlet and outlet |
| CN112316721A (en) * | 2020-11-10 | 2021-02-05 | 南通中远海运川崎船舶工程有限公司 | Large-scale ship combined type desulfurization device and desulfurization method |
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Application publication date: 20211214 |
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