CN111039433A - System and method for treating ship tail gas desulfurization washing wastewater - Google Patents
System and method for treating ship tail gas desulfurization washing wastewater Download PDFInfo
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- CN111039433A CN111039433A CN201911282610.4A CN201911282610A CN111039433A CN 111039433 A CN111039433 A CN 111039433A CN 201911282610 A CN201911282610 A CN 201911282610A CN 111039433 A CN111039433 A CN 111039433A
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 38
- 230000023556 desulfurization Effects 0.000 title claims abstract description 38
- 239000002351 wastewater Substances 0.000 title claims abstract description 37
- 238000005406 washing Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 106
- 239000012528 membrane Substances 0.000 claims abstract description 90
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 48
- 238000011001 backwashing Methods 0.000 claims abstract description 26
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000004065 wastewater treatment Methods 0.000 claims description 12
- 239000008394 flocculating agent Substances 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000000084 colloidal system Substances 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000000701 coagulant Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 239000002283 diesel fuel Substances 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- 239000010802 sludge Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 13
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000011101 absolute filtration Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 125000001741 organic sulfur group Chemical group 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a system and a method for treating ship tail gas desulfurization washing wastewater, which comprises the following steps: a desulphurization circulating water tank, a water supply device, a membrane treatment device and a dehydrator device; the water supply device comprises a waste water pump and a net filter; the membrane treatment device comprises an oil separation tank, an ultrafiltration membrane tank, a water production pump, a backwashing water tank, a backwashing water pump and a concentrated water pump; the dehydrator device comprises a screw-stacking dehydrator. The invention has the beneficial effects that: the system mainly comprises a water supply device, a membrane treatment device and a dehydrator device, and can be integrally installed or disassembled to be respectively installed in the cabin, so that the space utilization rate is improved; the water supply device of the system is independently skid-mounted into a whole, has compact structure and small land occupation, can be arranged nearby according to the position of the desulphurization circulating water tank, and effectively solves the problem of cavitation allowance of the suction inlet of the water pump; the membrane treatment device of the system adopts integrated skid-mounted equipment and can be independently arranged according to the field; the dewatering device of the system is a single unit device and can be arranged according to the requirement.
Description
Technical Field
The invention relates to a system and a method for treating ship tail gas desulfurization washing wastewater, and belongs to the technical field of ship desulfurization wastewater treatment.
Background
The tail gas discharged by the combustion of the marine diesel engine contains a large amount of SO2When a closed system of a wet desulphurization technology is used for operation, desulphurization washing wastewater containing various pollutants can be generated, and the wastewater mainly comes from circulating washing liquid of the desulphurization system, equipment cleaning wastewater and the like. The desulfurization washing wastewater contains pollutants such as suspended matters, polycyclic aromatic hydrocarbons and COD (mainly sulfite), and is discharged after being treated to reach the standard offshore or stored on a ship and conveyed to the shore for treatment.
The traditional desulfurization wastewater treatment generally adopts a triple box process, various agents are added to remove indexes such as heavy metal, SS and the like, the process is suitable for land projects, and mainly relates to equipment such as a triple box, a lime milk preparation system, an organic sulfur dosing system, a clarifier, various pumps, fans and the like, a regulating tank and a clean water tank need to be built, and the problems of complex system flow, large occupied area, high investment cost, difficult operation and maintenance and the like exist. Therefore, in order to be suitable for the situations of limited cabin space, different indexes of wastewater pollutants, different treatment requirements and the like, the development of a ship tail gas desulfurization and washing wastewater treatment system which is simple in system, small in occupied area, flexible in combination and better in economical efficiency is urgently needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a system and a method for treating the ship tail gas desulfurization washing wastewater, which have the advantages of simple system, small occupied area, flexible combination and stable treatment effect.
The system for treating the ship tail gas desulfurization washing wastewater comprises a desulfurization circulating water tank, a water supply device, a membrane treatment device and a dehydrator device; the water supply device comprises a waste water pump and a net filter; the membrane treatment device comprises an oil separation tank, an ultrafiltration membrane tank, a water production pump, a backwashing water tank, a backwashing water pump and a concentrated water pump; the dehydrator device comprises a screw-stacking dehydrator; the output end of the desulfurization circulating water tank is connected with the input end of the mesh filter through a waste water pump; the output end of the screen filter is connected with the input end of an oil separation tank at the front end of the membrane treatment device, the output end of the oil separation tank is connected with an ultrafiltration membrane tank, an ultrafiltration membrane component is arranged in the ultrafiltration membrane tank, the output end of the ultrafiltration membrane component is connected with the input end of a backwashing water tank through a water production pump, and the output end of the backwashing water tank is connected to the ultrafiltration membrane component through a backwashing water pump; the concentrated water output end at the bottom of the ultrafiltration membrane pool is connected to the input end of the dehydrator device through a concentrated water pump.
Preferably, the method comprises the following steps: the water supply device is independently skid-mounted into a whole and is arranged close to the desulfurization circulating water tank.
Preferably, the method comprises the following steps: the screen filter is provided with a first use and a second use.
Preferably, the method comprises the following steps: and a flocculating agent dosing system is arranged on a pipeline between the water supply device and the membrane treatment device.
Preferably, the method comprises the following steps: the membrane treatment device adopts integrated skid-mounted equipment and comprises a membrane treatment system, a flocculating agent dosing system, a dehydration coagulant aid dosing system, an ultrafiltration membrane backwashing system and an ultrafiltration membrane chemical cleaning system.
Preferably, the method comprises the following steps: the dehydrator is a single device.
Preferably, the method comprises the following steps: the water supply device, the membrane treatment device and the dehydrator device are connected through a communication cable, and the membrane treatment device is provided with a local integrated PLC.
The treatment method of the ship tail gas desulfurization washing wastewater treatment system comprises the following steps:
1) washing wastewater concentrated by the tail gas desulfurization closed cycle is stored in a desulfurization cycle water tank, is conveyed into a membrane treatment device through a wastewater pump in a water supply device and a mesh filter, and a flocculating agent is added into a conveying pipeline;
2) the waste water flows through an oil separation tank at the front end of the membrane treatment device to remove the residual floating oil after the diesel oil is incompletely combusted;
3) then the wastewater flows into an ultrafiltration membrane pool, is pumped by a water production pump, and is filtered by an ultrafiltration membrane component to remove colloids, suspended matters and PAH in the wastewater;
4) the treated produced water flows into a backwashing water tank for backwashing water of the ultrafiltration membrane, and the redundant produced water is led to outboard for discharge through a pipeline;
5) concentrated sewage generated by the ultrafiltration membrane pool is pumped to a dehydrator by a concentrated water pump, after being dehydrated by a screw-overlapping dehydrator, sludge is collected and landed for treatment, and filtrate is sent to a slag cabin for storage.
The invention has the beneficial effects that: the system mainly comprises a water supply device, a membrane treatment device and a dehydrator device, and can be integrally installed or disassembled to be respectively installed in the cabin, so that the space utilization rate is improved; the water supply device of the system is independently skid-mounted into a whole, has compact structure and small land occupation, can be arranged nearby according to the position of the desulphurization circulating water tank, and effectively solves the problem of cavitation allowance of the suction inlet of the water pump; the membrane treatment device of the system adopts integrated skid-mounted equipment and can be independently arranged according to the field; the dewatering device of the system is a single unit device and can be arranged according to the requirement.
Drawings
FIG. 1 is a process flow diagram of a wastewater treatment system for desulfurization and washing of marine tail gas.
Description of reference numerals: 1-a desulfurization circulating water tank; 2-a water supply device; 3-a waste water pump; 4-a screen filter; 5-a membrane treatment device; 6-oil separation tank; 7-ultrafiltration membrane tank; 8-an ultrafiltration membrane module; 9-water production pump; 10-a backwash water tank; 11-backwashing water pump; 12-a concentrate pump; 13-dewatering machine arrangement.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The system for treating the ship tail gas desulfurization washing wastewater is mainly used for treating the washing wastewater of the ship tail gas in a closed cycle operation stage by adopting a mixed desulfurization process, and the wastewater mainly exceeds standard items such as PAH (polycyclic aromatic hydrocarbons), suspended matters and the like. The system comprises a desulphurization circulating water tank 1, a water supply device 2, a membrane treatment device 5 and a dehydrator 13; the water supply device 2 comprises a waste water pump 3 and a screen filter 4; the membrane treatment device 5 comprises an oil separation tank 6, an ultrafiltration membrane tank 7, a water production pump 9, a backwashing water tank 10, a backwashing water pump 11 and a concentrated water pump 12; the dehydrator device 13 comprises a screw-stacking dehydrator; the output end of the desulfurization circulating water tank 1 is connected with the input end of a mesh filter 4 through a waste water pump 3; the output end of the screen filter 4 is connected with the input end of an oil separation tank 6 at the front end of the membrane treatment device 5, the output end of the oil separation tank 6 is connected with an ultrafiltration membrane tank 7, an ultrafiltration membrane component 8 is arranged in the ultrafiltration membrane tank 7, the output end of the ultrafiltration membrane component 8 is connected with the input end of a backwash water tank 10 through a water production pump 9, and the output end of the backwash water tank 10 is connected to the ultrafiltration membrane component 8 through a backwash water pump 11; the concentrated water output end at the bottom of the ultrafiltration membrane pool 7 is connected with the input end of a dehydrator device 13 through a concentrated water pump 12.
The water supply device 2 is independently skid-mounted into a whole, has a compact structure and small land occupation, can be arranged nearby according to the position of the desulfurization circulating water tank, and effectively solves the problem of cavitation allowance of a water pump suction inlet.
The water supply device 2 is provided with a net filter 4 for intercepting large-particle substances and protecting a follow-up silicon carbide ultrafiltration membrane component.
The screen filter 4 is provided with one function and one spare function, and the function of cleaning and overhauling the filter screen without stopping the machine can be realized.
And a flocculating agent dosing system is arranged at the outlet of the water supply device 2 to improve the SS removing effect.
The membrane treatment device 5 adopts integrated skid-mounted equipment and can be independently arranged according to the field. The membrane treatment device 5 is integrated with units such as a membrane treatment system, a flocculating agent dosing system, a dehydration coagulant aid dosing system, an ultrafiltration membrane backwashing system, an ultrafiltration membrane chemical cleaning system and the like.
The front end of the water inlet of the membrane treatment device 5 is provided with an oil separation tank 6, so that floating oil generated by incomplete combustion of fuel oil is removed, and membrane elements are prevented from being polluted.
The membrane treatment device 5 adopts a silicon carbide flat ultrafiltration membrane component, and removes most of colloid and suspended matters by utilizing the absolute filtration capacity of an ultrafiltration membrane, thereby effectively reducing the concentration of PAH.
The water produced by the membrane treatment device 5 is collected by the backwashing water tank 10 and is used for backwashing the ultrafiltration membrane component, and the redundant produced water can be led to outboard discharge.
The dehydrator device 13 is a single device and can be arranged as required. Concentrated water generated by the ultrafiltration membrane tank 7 is conveyed to the spiral shell stacking dehydrator by a concentrated water pump 12 for dehydration, mud cakes are collected and then are treated ashore, and leachate returns to the slag cabin for storage.
The equipment materials of the system contacting the waste water are all made of SS2205 materials, so that the corrosion of chloride ions is effectively avoided, and the service life of the equipment is ensured.
The silicon carbide flat ultrafiltration membrane is adopted to treat the desulfurization wastewater, main pollutants such as SS and the like can be effectively removed, the final effluent quality can meet the requirements of MEPC.259(68), the turbidity of washing water can be lower than 10NTU or equivalent units, and the continuous maximum PAH concentration does not exceed 50 mug/L of the inlet PAH concentration.
In order to improve the space utilization rate, the system is divided into three independent unit devices which can be combined and arranged according to the volume of the cabin; the water supply device 2, the membrane treatment device 5 and the dehydrator device 13 form a complete system through communication cables, and the full-automatic operation of the system is realized through the local integrated PLC arranged on the membrane treatment device 5.
Washing wastewater concentrated by tail gas desulfurization closed cycle is stored in a desulfurization cycle water tank 1, is conveyed into a membrane treatment device 5 through a wastewater pump 3 in a water supply device 2 and a mesh filter 4, and a flocculating agent is added into a conveying pipeline to improve the SS removal effect; the waste water flows through an oil separation tank 6 at the front end of a membrane treatment device 5 to remove floating oil remained after the diesel oil is incompletely combusted; then flows into an ultrafiltration membrane pool 7, is sucked by a water production pump 9, and is filtered by an ultrafiltration membrane component 8, so that pollutants such as colloid, suspended matters, PAH and the like are effectively removed; the treated produced water flows into a backwashing water tank 10 for backwashing of the ultrafiltration membrane, and the redundant produced water is led to outboard for discharge through a pipeline; the concentrated sewage generated by the ultrafiltration membrane tank 7 is sent to a dehydrator device 13 through a concentrated water pump 12, after being dehydrated by a screw-stacking dehydrator, the sludge is collected and ashore treated, and the filtrate is sent to a slag cabin for storage.
Claims (8)
1. The utility model provides a boats and ships tail gas desulfurization washing effluent disposal system which characterized in that: comprises a desulfurization circulating water tank (1), a water supply device (2), a membrane treatment device (5) and a dehydrator device (13); the water supply device (2) comprises a waste water pump (3) and a screen filter (4); the membrane treatment device (5) comprises an oil separation tank (6), an ultrafiltration membrane tank (7), a water production pump (9), a backwashing water tank (10), a backwashing water pump (11) and a concentrated water pump (12); the dehydrator device (13) comprises a screw-stacking dehydrator; the output end of the desulfurization circulating water tank (1) is connected with the input end of the mesh filter (4) through a waste water pump (3); the output end of the screen filter (4) is connected with the input end of an oil separation tank (6) at the front end of the membrane treatment device (5), the output end of the oil separation tank (6) is connected with an ultrafiltration membrane tank (7), an ultrafiltration membrane component (8) is arranged in the ultrafiltration membrane tank (7), the output end of the ultrafiltration membrane component (8) is connected with the input end of a backwashing water tank (10) through a water production pump (9), and the output end of the backwashing water tank (10) is connected to the ultrafiltration membrane component (8) through a backwashing water pump (11); the bottom concentrated water output end of the ultrafiltration membrane pool (7) is connected with the input end of a dehydrator (13) through a concentrated water pump (12).
2. The marine tail gas desulfurization washing wastewater treatment system according to claim 1, characterized in that: the water supply device (2) is independently skid-mounted into a whole and is arranged close to the desulfurization circulating water tank (1).
3. The marine tail gas desulfurization washing wastewater treatment system according to claim 1, characterized in that: the screen filter (4) is provided with a first use and a second use.
4. The marine tail gas desulfurization washing wastewater treatment system according to claim 1, characterized in that: and a flocculating agent dosing system is arranged on a pipeline between the water supply device (2) and the membrane treatment device (5).
5. The marine tail gas desulfurization washing wastewater treatment system according to claim 1, characterized in that: the membrane treatment device (5) adopts integrated skid-mounted equipment, and the membrane treatment device (5) comprises a membrane treatment system, a flocculating agent dosing system, a dehydration coagulant aid dosing system, an ultrafiltration membrane backwashing system and an ultrafiltration membrane chemical cleaning system.
6. The marine tail gas desulfurization washing wastewater treatment system according to claim 1, characterized in that: the dehydrator device (13) is a single device.
7. The marine tail gas desulfurization washing wastewater treatment system according to claim 1, characterized in that: the water supply device (2), the membrane treatment device (5) and the dehydrator device (13) are connected through a communication cable, and the membrane treatment device (5) is provided with a local integrated PLC.
8. The treatment method of the ship tail gas desulfurization washing wastewater treatment system according to claim 1, characterized by comprising the following steps:
1) washing wastewater subjected to tail gas desulfurization closed cycle concentration is stored in a desulfurization cycle water tank (1), is conveyed into a membrane treatment device (5) through a wastewater pump (3) in a water supply device (2) and a screen filter (4), and a flocculating agent is added into a conveying pipeline;
2) the waste water flows through an oil separation tank (6) at the front end of the membrane treatment device (5) to remove the residual floating oil after the diesel oil is incompletely combusted;
3) then flows into an ultrafiltration membrane pool (7) and is pumped by a water production pump (9), and an ultrafiltration membrane component (8) carries out filtration treatment on the wastewater to remove colloids, suspended matters and PAH in the wastewater;
4) the treated produced water flows into a backwashing water tank (10) for backwashing of the ultrafiltration membrane, and the redundant produced water is led to outboard for discharge through a pipeline;
5) concentrated sewage generated by the ultrafiltration membrane pool (7) is sent to a dehydrator device (13) through a concentrated water pump (12), and is dehydrated through a screw-stacking dehydrator, sludge is collected and is ashed for treatment, and filtrate is sent to a slag cabin for storage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911282610.4A CN111039433A (en) | 2019-12-13 | 2019-12-13 | System and method for treating ship tail gas desulfurization washing wastewater |
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| CN201911282610.4A CN111039433A (en) | 2019-12-13 | 2019-12-13 | System and method for treating ship tail gas desulfurization washing wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112919737A (en) * | 2021-01-28 | 2021-06-08 | 安徽拓水环境工程科技有限公司 | Shared town sewage integrated treatment equipment |
| CN113818947A (en) * | 2021-10-26 | 2021-12-21 | 广船国际有限公司 | Desulfurization system circulating water tank and ship |
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