CN219929649U - Water treatment device of exhaust gas recirculation system of main propulsion device - Google Patents
Water treatment device of exhaust gas recirculation system of main propulsion device Download PDFInfo
- Publication number
- CN219929649U CN219929649U CN202320303898.4U CN202320303898U CN219929649U CN 219929649 U CN219929649 U CN 219929649U CN 202320303898 U CN202320303898 U CN 202320303898U CN 219929649 U CN219929649 U CN 219929649U
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- gas recirculation
- exhaust gas
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- water treatment
- circulating water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 239000007789 gas Substances 0.000 claims abstract description 59
- 239000002912 waste gas Substances 0.000 claims abstract description 42
- 239000002893 slag Substances 0.000 claims abstract description 34
- 238000000926 separation method Methods 0.000 claims abstract description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 87
- 239000013505 freshwater Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 2
- 239000013049 sediment Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000002245 particle Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 150000003568 thioethers Chemical class 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model relates to the field of ship waste gas treatment, and provides a water treatment device of a waste gas recirculation system of a main propulsion device. The input end of the water treatment separation device is connected with the buffer tank, the first path of circulating water treated by the water treatment separation device is output to the buffer tank, the supply pump unit, the second path of circulating water is output to the ship side for emission, and the third path of circulating water is output to the exhaust gas recirculation discharge cabin; the residues treated by the water treatment and separation device are discharged to an exhaust gas recirculation residue cabin through a pipeline; the buffer tank is provided with interfaces respectively connected with a circulating water outlet of the recirculation system, the waste gas recirculation discharge cabin and the water treatment unit, and circulating water at the top of the waste gas recirculation discharge cabin is conveyed to the buffer tank through the slag reducing pump. By adopting a modularized design, the cabin with partial small volume is increased, the treatment efficiency of the circulating water is improved, the qualified circulating water is recovered and reused, each unit is provided with a channel which is discharged to the waste gas recirculation slag cabin, and the pipeline can be emptied under the stop state, so that the conditions of blockage and the like are avoided.
Description
Technical Field
The utility model relates to the field of ship waste gas treatment, in particular to a water treatment device of a waste gas recirculation system of a main propulsion device.
Background
The water treatment system of the exhaust gas recirculation system is the main force for assisting the exhaust gas recirculation system (EGR) to reach the standard. The primary propulsion device of the ship with the keel laid on the 1 st month and 1 st year in the 2016-year operation in the emission control region needs to meet the 3-stage emission requirement, and the 3-stage emission (Tier 3) needs to reduce the emission of nitrogen oxides by 75% compared with the 2-stage emission (Tier 2).
In order for the emission of nitrogen oxides to reach the standard, the main propulsion device is provided with an Exhaust Gas Recirculation (EGR), and the EGR is provided with a water treatment device for cleaning the water circulation of the EGR. The water treatment system of the exhaust gas recirculation system is one of the main core components of the exhaust gas recirculation system. Because the waste gas of the host machine enters the cylinder again to carry out circulation to participate in combustion, and the waste gas contains acid washing gas, carbon deposition and other impurities, in order to prevent sulfide and solid particles in the recycled waste gas from damaging the host machine, the waste gas needs to be cleaned and treated, and the water treatment system of the waste gas recycling system can realize the cleaning of the waste gas by providing the continuously recycled washing water for the waste gas recycling system unit. Because the circulating water is turbid, has certain acidity or alkalinity and contains particulate impurities, the circulating water also needs to be subjected to water quality treatment. The water treatment plant system must be able to ensure removal of solid particles and neutral sulfides accumulated in the circulating water and ensure that the water supply rate and pressure are able to provide sufficient wash water to the exhaust gas recirculation system unit.
The existing water treatment system of the ultra-large ship generally adopts foreign import equipment such as alpha manufacturer, and the purchase cost of the complete equipment is high. In addition, the space characteristics of the cabin are considered, the water treatment system is compact as much as possible, and meanwhile, the reasonable arrangement of the components of the main machine and the water treatment system is considered in combination with the condition that the cabin space is limited, so that the water treatment system is compact in structure, modularized in unit and convenient to arrange in the compact and limited space.
Disclosure of Invention
In order to reduce the purchase cost of equipment, considering the limitation of cabin space, the utility model aims to provide a water treatment device of a modularized and compact main propulsion device exhaust gas recirculation system.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the water treatment device of the waste gas recirculation system of the main propulsion device comprises a buffer tank unit, a supply pump unit and a water treatment unit, wherein the supply pump unit is connected with a circulating water inlet of the waste gas recirculation system, a circulating water outlet of the waste gas recirculation system is connected with the buffer tank unit, circulating water in the buffer tank unit enters the water treatment unit, circulating water treated by the water treatment unit returns to the buffer tank unit, the supply pump unit pumps the circulating water from the buffer tank unit and sends the circulating water into the waste gas recirculation system, the water treatment device further comprises a sodium hydroxide cabin, a waste gas recirculation slag cabin and a waste gas recirculation discharge cabin, the supply pump unit comprises a supply control circuit, a sodium hydroxide pump and a supply pump, the supply pump unit is respectively connected with the buffer tank unit, a sodium hydroxide cabin interface and a fresh water interface, and the sodium hydroxide pump is connected with the sodium hydroxide interface through a pipeline and a valve; the supply pump is connected with the buffer cabinet interface and the fresh water interface through the pipeline and the valve, and the output end of the sodium hydroxide pump and the output end of the supply pump are connected with the circulating water inlet of the waste gas recirculation system after being converged through the pipeline; the supply control circuit controls the supply pump, the sodium hydroxide pump and the valve; the water treatment unit comprises a plurality of parallel water treatment separation devices, the input end of each water treatment separation device is connected with the buffer cabinet, circulating water treated by each water treatment separation device is divided into three paths of output through a pipeline and a valve, the first path of the circulating water is output to the buffer cabinet, the supply pump unit, the second path of the circulating water is output to the ship side for emission, and the third path of the circulating water is output to the exhaust gas recirculation discharge cabin; the residues treated by the water treatment and separation device are discharged to an exhaust gas recirculation residue cabin through a pipeline; the buffer tank is provided with interfaces respectively connected with a circulating water outlet of the recirculation system, the waste gas recirculation discharge cabin and the water treatment unit, and circulating water at the top of the waste gas recirculation discharge cabin is conveyed to the buffer tank through the slag reducing pump.
Further, a filtering unit is arranged between the buffer cabinet and the water treatment unit and at least comprises a filter and a filter residue outlet, and the filter residue outlet is connected with the waste gas recycling residue cabin.
Further, the exhaust gas recirculation slag cabin is provided with a plurality of overflow ports with different heights, each overflow port is respectively connected with the exhaust gas recirculation discharge cabin, and each overflow port is respectively provided with a sampling valve and a control valve.
Further, the waste gas recirculation slag cabin is connected with a slag pump through a pipeline, the slag pump is output to the deck through the pipeline, a valve is installed at the top of the pipeline, and the valve is connected with compressed air.
Further, each pipeline of the feed pump unit is provided with a discharge valve, the bottom of the feed pump unit is provided with a discharge disc, the discharge disc is provided with a plurality of discharge ports, and each discharge port is connected with the exhaust gas recirculation slag cabin through a pipeline.
Further, an electric auxiliary heating device is arranged on the pipeline for conveying sodium hydroxide.
After the technical scheme is adopted, the beneficial effects of the utility model are as follows:
through setting up the buffer tank, with waste gas recirculation system circulating water buffer memory and send into waste gas recirculation system again through the feed pump after the circulating water treatment in the buffer tank through water treatment unit and circulate, the buffer tank has effectively buffered the load of water treatment unit department.
The feed pump unit can supplement fresh water and sodium hydroxide in addition to the circulating water for neutralizing sulfides in the circulating water. The proportion of the circulating liquid, the sodium hydroxide and the fresh water is realized by the control of the supply control circuit, so that the water quality of the circulating water is ensured.
By providing an exhaust gas recirculation slag bin and an exhaust gas recirculation drain bin, the exhaust gas recirculation slag bin is used for collecting residues at the water treatment device and drain water at each unit; the waste gas recirculation discharge cabin is used for collecting superfluous treated circulating water of the water treatment unit and qualified clean water at the upper part of the waste gas recirculation slag cabin after precipitation; and qualified circulating water in the waste gas recirculation discharge cabin is pumped into the buffer tank through the slag reducing pump to perform internal reference and circulation, so that the effect of secondary utilization is achieved.
According to the technical scheme, a modularized design is adopted, a part of small-volume cabins are added, the treatment efficiency of circulating water is improved, qualified circulating water is recovered and reused, the circulating water is discharged to the side after exceeding the cabin, and residues exceeding the cabin are pumped to the side by a slag pump; each unit is provided with a channel which is discharged to the exhaust gas recirculation slag cabin, and the pipeline can be emptied under the stop state, so that the conditions of freezing or blockage and the like are avoided.
Drawings
Fig. 1 is a schematic diagram of the present technical solution.
Fig. 2 is a piping diagram of the feed pump unit.
Fig. 3 is a piping diagram of the present technical solution.
Description of the embodiments
The following detailed description of the utility model refers to the accompanying drawings, which illustrate specific embodiments of the utility model:
as shown in fig. 1, a water treatment device of an exhaust gas recirculation system of a main propulsion device is composed of an exhaust gas recirculation unit 1, a buffer tank unit 2, a supply pump unit 3, a water treatment unit 4, a sodium hydroxide cabin 5, an exhaust gas recirculation slag cabin 6, an exhaust gas recirculation discharge cabin 7, a slag reduction pump unit 8 and a filtering unit 9. The exhaust gas recirculation unit 1 is installed in the main propulsion device, the exhaust gas recirculation unit 1 being provided with a circulating water inlet 11 and a circulating water outlet 12. The circulating water cleans and washes the exhaust gas in the exhaust gas recirculation unit 1, so that the circulating water at the outlet of the circulating water contains particulate matters and sulfides and is acidic. The technical scheme is used for treating the circulating water.
The circulating process of the circulating water outside the exhaust gas recirculation unit 1 is as follows: the circulating water is discharged from the waste gas recirculation unit 1 and enters the buffer tank unit 2, and is stored in the buffer tank 21, the buffer tank 21 is connected with the sodium hydroxide cabin 5, alkali liquor is provided by the sodium hydroxide cabin 5, sulfide in the circulating water in the buffer tank 21 is neutralized, and an electric auxiliary heating device is arranged on a pipeline for conveying sodium hydroxide. Meanwhile, particles are precipitated in the buffer cabinet 21, a discharge port 22 is formed in the bottom of the buffer cabinet 21, residues at the bottom are discharged into the waste gas recirculation slag cabin 6 for collection, and when the circulating water in the buffer cabinet 21 is full, the residues overflow or are discharged into the waste gas recirculation slag cabin 6; the supernatant liquid at the top of the buffer tank 21 is sent to the water treatment unit 4 through the filter unit 9. The filter unit 9 mainly includes a filter 91, the filter 91 is provided with a drain 92, and the residue in the filter 91 is pumped to the drain 92 and discharged into the egr slag compartment 6.
Three groups of water treatment devices 41 are arranged in the water treatment unit 4 and are used for further separating particles in circulating water, residues treated by the three groups of water treatment devices 41 are discharged into the waste gas recirculation residue cabin 6 through discharge pipelines, and pure circulating water treated by the water treatment devices 41 is respectively sent to the feed pump unit 3, the buffer cabinet 21, the waste gas recirculation discharge cabin 7 and the discharge of the side through pipelines. By controlling the internal piping and valve members, the exhaust gas is preferentially sent to the feed pump unit 3, and then to the buffer tank 21 and the exhaust gas recirculation discharge tank 7, and when the tank capacity is insufficient, the exhaust gas is sent to the side for discharge, thereby avoiding the occupation of space.
The exhaust gas recirculation slag cabin 6 is used for precipitation of particulate matters, after standing, the upper layer is circulating liquid, the lower layer is impurities, the middle part and the middle upper part of the exhaust gas recirculation slag cabin are respectively provided with a detection valve 61, the detection valves 61 are connected with the exhaust gas recirculation discharge cabin 7, the quality of circulating water above the liquid level is detected through the detection valves 61, and qualified circulating water overflows to the exhaust gas recirculation discharge cabin 7. The exhaust gas recirculation discharge cabin 7 circulates the circulating liquid inside the exhaust gas recirculation discharge cabin through the slag reducing pump unit 8 and sends the circulating liquid into the buffer tank 21 for secondary use.
After circulating the circulating water between the units, the liquid is finally supplied to the exhaust gas recirculation unit 1 by the supply pump unit 3. As shown in fig. 2, the supply pump unit 3 includes a supply control circuit 31, a sodium hydroxide pump 32 and a supply pump 33, the supply pump unit 3 is provided with an interface for respectively connecting the buffer tank 21 and the sodium hydroxide tank 5 and a fresh water interface, the fresh water interface is connected with a pipeline of the water treatment unit 4, one output of the water treatment unit and the input of the buffer tank are combined and then are sent to the supply pump 33 through the control of the pipeline and the valve, the sodium hydroxide pump 32 extracts sodium hydroxide from the sodium hydroxide tank 5, and the sodium hydroxide is output to the inside of the gas recirculation unit 1 together with the supply pump 33 through the control of the pipeline and the valve for waste gas absorption treatment. The supply control circuit 31 controls the valve and the pump on the pipeline to realize the content of sodium hydroxide in the circulating water and the input flow rate at each interface.
The pipeline of each unit is provided with a discharge valve, each pipeline is provided with a certain gradient, the circulating water in the pipeline is discharged cleanly in a shutdown state and the like, the bottom of each unit is provided with a discharge disc 10, and the circulating water is discharged into the exhaust gas recirculation slag cabin 6 through the discharge disc 10 and the discharge pipeline. The waste gas recirculation slag cabin conveys the residue at the bottom of the waste gas recirculation slag cabin to the deck through a slag pump 62 for collecting and cleaning on the side of the deck, a valve 63 is arranged at the tail end of a pipeline at the deck, compressed air can pass through the valve, and after conveying is completed, the residue in the pipeline is blown into the waste gas recirculation slag cabin 6 through a compression space, so that the pipeline is prevented from being blocked.
Claims (6)
1. The utility model provides a water treatment facilities of main propulsion unit exhaust gas recirculation system, including the buffer tank unit, supply pump unit and water treatment unit, supply pump unit connects exhaust gas recirculation system's circulating water entry, exhaust gas recirculation system's circulating water export is connected the buffer tank unit, circulating water in the buffer tank unit gets into water treatment unit, the circulating water after the water treatment unit handles returns the buffer tank unit, supply pump unit draws circulating water from the buffer tank unit and sends into exhaust gas recirculation system, characterized by still including sodium hydroxide cabin, exhaust gas recirculation sediment cabin and exhaust gas recirculation discharge cabin, supply pump unit includes supply control circuit, sodium hydroxide pump and supply pump, and supply pump unit connects buffer tank unit, sodium hydroxide cabin interface and fresh water interface respectively, the sodium hydroxide pump is connected the sodium hydroxide interface through pipeline and valve member; the supply pump is connected with the buffer cabinet interface and the fresh water interface through the pipeline and the valve, and the output end of the sodium hydroxide pump and the output end of the supply pump are connected with the circulating water inlet of the waste gas recirculation system after being converged through the pipeline; the supply control circuit controls the supply pump, the sodium hydroxide pump and the valve; the water treatment unit comprises a plurality of parallel water treatment separation devices, the input end of each water treatment separation device is connected with the buffer cabinet, circulating water treated by each water treatment separation device is divided into three paths of output through a pipeline and a valve, the first path of the circulating water is output to the buffer cabinet, the supply pump unit, the second path of the circulating water is output to the ship side for emission, and the third path of the circulating water is output to the exhaust gas recirculation discharge cabin; the residues treated by the water treatment and separation device are discharged to an exhaust gas recirculation residue cabin through a pipeline; the buffer tank is provided with interfaces respectively connected with a circulating water outlet of the recirculation system, the waste gas recirculation discharge cabin and the water treatment unit, and circulating water at the top of the waste gas recirculation discharge cabin is conveyed to the buffer tank through the slag reducing pump.
2. The water treatment device of the exhaust gas recirculation system of the main propulsion device according to claim 1, wherein a filtering unit is arranged between the buffer tank and the water treatment unit, the filtering unit at least comprises a filter and a filter residue outlet, and the filter residue outlet is connected with the exhaust gas recirculation residue cabin.
3. The water treatment device of the exhaust gas recirculation system of the main propulsion device according to claim 1, wherein the exhaust gas recirculation slag compartment is provided with a plurality of overflow ports with different heights, each overflow port is respectively connected with the exhaust gas recirculation discharge compartment, and each overflow port is respectively provided with a sampling valve and a control valve.
4. A water treatment device for a main propulsion unit exhaust gas recirculation system according to claim 3, wherein the exhaust gas recirculation slag chamber is connected with a slag pump via a pipe, the slag pump is output to the deck via a pipe, a valve is mounted on the top of the pipe, and the valve is connected with compressed air.
5. The water treatment device of the exhaust gas recirculation system of the main propulsion device according to claim 1, wherein each pipeline of the feed pump unit is provided with a discharge valve, the bottom of the feed pump unit is provided with a discharge disc, the discharge disc is provided with a plurality of discharge ports, and each discharge port is connected with the exhaust gas recirculation slag compartment through a pipeline.
6. A water treatment device for a main propulsion unit exhaust gas recirculation system according to claim 1, wherein an electric auxiliary heating device is mounted on the conduit carrying sodium hydroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320303898.4U CN219929649U (en) | 2023-02-24 | 2023-02-24 | Water treatment device of exhaust gas recirculation system of main propulsion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320303898.4U CN219929649U (en) | 2023-02-24 | 2023-02-24 | Water treatment device of exhaust gas recirculation system of main propulsion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219929649U true CN219929649U (en) | 2023-10-31 |
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ID=88491957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320303898.4U Active CN219929649U (en) | 2023-02-24 | 2023-02-24 | Water treatment device of exhaust gas recirculation system of main propulsion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219929649U (en) |
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2023
- 2023-02-24 CN CN202320303898.4U patent/CN219929649U/en active Active
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