CN112250239B - Ship diesel engine waste gas washing water treatment device utilizing ship waste heat - Google Patents
Ship diesel engine waste gas washing water treatment device utilizing ship waste heat Download PDFInfo
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- CN112250239B CN112250239B CN202011212599.7A CN202011212599A CN112250239B CN 112250239 B CN112250239 B CN 112250239B CN 202011212599 A CN202011212599 A CN 202011212599A CN 112250239 B CN112250239 B CN 112250239B
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- heat exchanger
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- pump
- flue gas
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- 238000005406 washing Methods 0.000 title claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000002912 waste gas Substances 0.000 title claims abstract description 15
- 239000002918 waste heat Substances 0.000 title claims abstract description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000003546 flue gas Substances 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 238000001914 filtration Methods 0.000 claims abstract description 25
- 238000001556 precipitation Methods 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 19
- 239000010865 sewage Substances 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 13
- 238000004064 recycling Methods 0.000 claims abstract description 9
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 24
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 230000001376 precipitating effect Effects 0.000 claims description 9
- 238000004062 sedimentation Methods 0.000 claims description 6
- 229940090046 jet injector Drugs 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 abstract description 13
- 239000013505 freshwater Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000004821 distillation Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000003595 mist Substances 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000005201 scrubbing Methods 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 238000005200 wet scrubbing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
Classifications
-
- 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
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- 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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray evaporation
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
Abstract
The invention discloses a marine diesel engine waste gas washing water treatment device utilizing marine waste heat, which comprises a flue gas washing module and a waste water treatment recycling module; the flue gas washing module comprises a heat exchange unit, a washing tower, a dosing box, a metering pump, a chimney, a liquid-gas separation device, a fan, a flue gas heat exchanger, a two-stage filtration precipitation cabinet, an electric heater and a sewage pump; the wastewater treatment recycling module comprises a steam ejector, an ejector pump, a flash tank, a condenser, a liquid storage tank and a centrifugal pump a. According to the invention, the waste gas washing water of the marine diesel engine is treated by utilizing the marine waste heat, so that the energy consumption is reduced, and the consumption of fresh water is reduced; the invention has no wastewater discharge in the treatment process, and can not pollute the sea; the washing water can be recycled after distillation and purification, and has no influence on the components of the washing liquid and no influence on the treatment of the exhaust gas of the marine diesel engine; the invention reduces the formation of white mist.
Description
Technical Field
The invention relates to a ship diesel engine waste gas washing water treatment device, in particular to a ship diesel engine waste gas washing water treatment device utilizing ship waste heat.
Background
The exhaust gas pollutants of the marine diesel engine bring great harm to human living environment and physical health. Environmental regulations are becoming more stringent with the emphasis on environmental protection. Current marine exhaust gas treatment systems mainly comprise two types, namely dry treatment systems and wet scrubbing systems. Wet scrubbing systems are commonly used in the treatment of marine exhaust gas due to their good cleaning effect. Wet scrubbing systems fall into three different modes: the first seawater washing waste gas-open mode, wherein the alkaline of the seawater is utilized to absorb SOx in the waste gas, and the washed waste water is discharged into the sea after being treated; the second mode is a freshwater washing waste gas-closed mode, and alkaline substances (usually NaOH) are added to react with SOx in the waste gas to generate salts, and the reacted washing waste water is stored on a ship or directly discharged into the sea after being treated; in the closed system, the washing water is recycled, so Na in the washing water 2 SO 4 The concentration is gradually increased. When Na is 2 SO 4 When the concentration is increased to a certain level, the efficiency of absorbing SOx is lowered, so that there is a problem in that it is necessary to regularly pump out part of the wash water to be discharged and to replenish fresh water and NaOH solution. The third mode is a seawater/fresh water washing waste gas-mixing mode, combines the advantages of an open mode and a closed mode, and operates in the open mode and the closed mode according to different conditions. No matter which working mode is adopted, washing wastewater containing various pollutants can be generated, and the washing wastewater is directly discharged into natural water body to endanger the original marine ecosystem. The international maritime organization sets strict emission standards for the emission of washing wastewater from ships. At present, the method mainly passes at home and abroadThe technology of coagulation-air flotation, cyclone separation, membrane separation, centrifugal separation and the like is used for purifying the washing wastewater, and the technology is used for directly discharging the washing water into the ocean after the treatment. Although the wash water is treated, a portion of the particulates and contaminants remain unremoved, and residual chemicals in the wash water may be detrimental to the aqueous environment. In addition, high temperature flue gas enters the washing device and can generate a large amount of white fog (containing acidic liquid drops), so that secondary pollution is caused.
Disclosure of Invention
In order to solve the problems in the prior art, the invention designs the marine diesel engine waste gas washing water treatment device which utilizes the marine waste heat to treat the marine waste gas washing water, not only can not change the components of the circulating washing liquid, but also can not discharge waste water.
In order to achieve the above object, the technical scheme of the present invention is as follows: a marine diesel engine waste gas washing water treatment device utilizing marine waste heat comprises a flue gas washing module and a waste water treatment and recycling module;
the flue gas washing module comprises a heat exchange unit, a washing tower, a dosing box, a metering pump, a chimney, a liquid-gas separation device, a fan, a flue gas heat exchanger, a two-stage filtration precipitation cabinet, an electric heater and a sewage pump;
the wastewater treatment and recycling module comprises a steam ejector, an ejector pump, a flash tank, a condenser, a liquid storage tank and a centrifugal pump a;
the heat exchange unit comprises three heat exchangers, wherein the three heat exchangers are a primary heat exchanger, a secondary heat exchanger and a tertiary heat exchanger respectively, and the primary heat exchanger, the secondary heat exchanger and the tertiary heat exchanger are sequentially connected in series; the high-temperature flue gas pipeline is connected with the washing tower after passing through the primary heat exchanger, the secondary heat exchanger and the tertiary heat exchanger; the inlets of heat exchange pipes of the primary heat exchanger, the secondary heat exchanger and the tertiary heat exchanger are connected with the outlet of the centrifugal pump a, and the outlets of the heat exchange pipes of the primary heat exchanger, the secondary heat exchanger and the tertiary heat exchanger are respectively connected with the working fluid inlet of the steam injector b, the working fluid inlet of the steam injector a and the injection fluid inlet of the steam injector a;
an inlet of the flue gas heat exchanger is connected with an outlet of the steam injector a, an outlet of the flue gas heat exchanger is connected with an inlet of the dosing box through the centrifugal pump b, an inlet of a heat exchange tube of the flue gas heat exchanger is connected with an outlet at the upper part of the chimney, and an outlet of the flue gas heat exchanger is connected with the exhaust pipe;
the washing tower is a wet-type washing tower, a spraying inlet at the upper part is connected with a metering pump outlet, and the outlet is respectively connected with an inlet of the two-stage filtering precipitation cabinet and an inlet of the chimney; the lower outlet of the chimney is connected with the inlet of the two-stage filtering and precipitating cabinet;
the liquid-gas separation device is arranged at the upper part of the chimney;
the fan is arranged at an outlet at the upper part of the chimney;
the outlet of the two-stage filtering and precipitating cabinet is connected with the inlet of the sewage pump;
the electric heater is arranged in the two-stage filtering precipitation cabinet;
the outlet of the sewage pump is respectively connected with the working fluid inlet of the jet pump and the top inlet of the flash tank;
the bottom outlet of the flash tank is connected with the liquid injection inlet of the injection pump, and the top outlet of the flash tank is connected with the injection inlet of the steam injector b;
the gas injection inlet of the jet pump is connected with the liquid storage tank, and the outlet of the jet pump is connected with the two-stage filtering precipitation cabinet;
the outlet of the steam jet injector a is connected with the inlet of the condenser through a pipeline;
the inlet of the top of the liquid storage tank is connected with the outlet of the condenser, and the outlet of the liquid storage tank is connected with the inlet of the centrifugal pump a;
the top of the dosing box is provided with a dosing port, and the outlet of the dosing box is connected with the inlet of the metering pump.
Further, the working fluid vapor pressure of the vapor injector a is lower than the working fluid vapor pressure of the vapor injector b; the ratio of the ejector throat area of the steam ejector a to the nozzle throat area is 10-50; the ratio of the ejector throat area of steam ejector b to the nozzle throat area is 50 to 150.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the waste gas washing water of the marine diesel engine is treated by utilizing the marine waste heat, so that the energy consumption is reduced, and the consumption of fresh water is reduced;
2. the invention has no wastewater discharge in the treatment process, and can not pollute the sea;
3. in the invention, the washing water can be recycled after distillation and purification, and the components of the washing liquid are not influenced, so that the waste gas treatment of the marine diesel engine is not influenced;
4. the invention fully utilizes the ship waste heat, so that the waste gas before entering the washing tower is fully cooled, and the formation of white fog is reduced.
Drawings
FIG. 1 is a schematic diagram of the composition of the present invention.
In the figure: 1. the device comprises a first-stage heat exchanger, a second-stage heat exchanger, a third-stage heat exchanger, a steam injector a,5, a flue gas heat exchanger, a 6, a washing tower, 7, a chimney, 8, a liquid-gas separation device, 9, a fan, 10, a dispensing box, 11, a metering pump, 12, a two-stage filtering sedimentation tank, 13, an electric heater, 14, a sewage pump, 15, an injection pump, 16, a flash tank, 17, a steam injector b,18, a condenser, 19, a liquid storage tank, 20, a centrifugal pump a,21 and a centrifugal pump b.
Detailed Description
The invention is further illustrated by the figures and examples. As shown in fig. 1, a marine diesel engine exhaust gas washing water treatment device utilizing marine waste heat comprises a flue gas washing module and a wastewater treatment recycling module;
the flue gas washing module comprises a heat exchange unit, a washing tower 6, a dispensing box 10, a metering pump 11, a chimney 7, a liquid-gas separation device 8, a fan 9, a flue gas heat exchanger 5, a two-stage filtration precipitation cabinet 12, an electric heater 13 and a sewage pump 14;
the wastewater treatment recycling module comprises a steam ejector, an ejector pump 15, a flash tank 16, a condenser 18, a liquid storage tank 19 and a centrifugal pump a20;
the heat exchange unit comprises three heat exchangers, wherein the three heat exchangers are a primary heat exchanger 1, a secondary heat exchanger 2 and a tertiary heat exchanger 3 respectively, and the primary heat exchanger 1, the secondary heat exchanger 2 and the tertiary heat exchanger 3 are sequentially connected in series; the high-temperature flue gas pipeline is connected with a washing tower 6 after passing through the primary heat exchanger 1, the secondary heat exchanger 2 and the tertiary heat exchanger 3; the inlets of heat exchange pipes of the primary heat exchanger 1, the secondary heat exchanger 2 and the tertiary heat exchanger 3 are connected with the outlet of the centrifugal pump a20, and the outlets of the heat exchange pipes of the primary heat exchanger 1, the secondary heat exchanger 2 and the tertiary heat exchanger 3 are respectively connected with the working fluid inlet of the steam injector b17, the working fluid inlet of the steam injector a4 and the injection fluid inlet of the steam injector a 4;
an inlet of the flue gas heat exchanger 5 is connected with an outlet of the steam injector a4, an outlet of the flue gas heat exchanger is connected with an inlet of the dispensing box 10 through a centrifugal pump b21, an inlet of a heat exchange tube of the flue gas heat exchanger 5 is connected with an outlet at the upper part of the chimney 7, and an outlet of the flue gas heat exchanger is connected with an exhaust pipe;
the washing tower 6 is a wet-type washing tower 6, a spraying inlet at the upper part is connected with an outlet of a metering pump 11, and the outlet is respectively connected with an inlet of a two-stage filtration precipitation cabinet 12 and an inlet of a chimney 7; the lower outlet of the chimney 7 is connected with the inlet of the two-stage filtering and precipitating cabinet 12;
the liquid-gas separation device 8 is arranged at the upper part of the chimney 7;
the fan 9 is arranged at the outlet of the upper part of the chimney 7;
the outlet of the two-stage filtering and settling tank 12 is connected with the inlet of the sewage pump 14;
the electric heater 13 is arranged in the two-stage filtering sedimentation cabinet 12;
the outlet of the sewage pump 14 is connected with the working fluid inlet of the jet pump 15 and the top inlet of the flash tank 16 respectively;
the bottom outlet of the flash tank 16 is connected with the liquid injection inlet of the jet pump 15, and the top outlet is connected with the injection inlet of the steam injector b 17;
the gas injection inlet of the jet pump 15 is connected with the liquid storage tank 19, and the outlet is connected with the two-stage filtering and precipitating cabinet 12;
the outlet of the steam jet injector a is connected with the inlet of the condenser 18 through a pipeline;
the inlet of the top of the liquid storage tank 19 is connected with the outlet of the condenser 18, and the outlet is connected with the inlet of the centrifugal pump a20;
the top of the dispensing box 10 is provided with a dosing port, and the outlet of the dispensing box 10 is connected with the inlet of the metering pump 11.
Further, the working fluid vapor pressure of the vapor injector a4 is lower than the working fluid vapor pressure of the vapor injector b 17; the ratio of the ejector throat area of the steam ejector a4 to the nozzle throat area is 10-50; the ratio of the ejector throat area of the steam ejector b17 to the nozzle throat area is 50 to 150.
The working process of the invention is as follows:
during operation, high-temperature flue gas is subjected to heat exchange and cooling in the primary heat exchanger 1, the secondary heat exchanger 2 and the tertiary heat exchanger 3 three times continuously, and low-temperature flue gas subjected to heat exchange and cooling enters the washing tower 6. The flue gas is subjected to multistage filling, spraying and spraying treatment in the washing tower 6, and fully contacts and reacts with spray liquid to form a solid-liquid mixture, and the solid-liquid mixture enters the two-stage filtering and precipitating cabinet 12 through a pipeline. The treated flue gas is discharged to the flue gas heat exchanger 5 through the chimney 7 by the liquid-gas separation device 8 under the suction effect of the fan 9, and the treated flue gas and the flue gas discharged from the steam injector a4 continuously exchange heat. The water separated by the liquid-gas separation device 8 can be discharged to the first grid precipitation tank of the two-stage filtering precipitation tank 12 through a pipeline. The solid-liquid mixture formed after the flue gas washing is first precipitated in the first grid precipitation cabinet of the two-stage filtration precipitation cabinet 12, and the waste water overflows to the second grid precipitation cabinet after gradually filling. A filter screen is arranged between the first grid sedimentation cabinet and the second grid sedimentation cabinet, so that the overflowed wastewater from the first grid sedimentation cabinet can be filtered. The second check deposits the cabinet and overflows to the third check and deposits the cabinet after gradually full once more, is equipped with filter equipment between second check deposit cabinet and the third check deposit cabinet, can filter the tiny granule in the waste liquid. The electric heater 13 in the secondary precipitation filter cabinet 12 can heat, evaporate and scale the water which is not discharged by the precipitation filter cabinet when the dirt is treated. The water vapor which is heated and evaporated by the primary heat exchanger 1 and is at about 170 ℃ enters the working fluid inlet of the steam injector b, so that the steam injector b is driven to work, the pressure in the tank is reduced by vacuumizing the flash tank 19, the wastewater in the third grid precipitation tank in the two-stage filtering precipitation tank 12 is pumped to the top of the flash tank 16 by the sewage pump 14 to be sprayed out, fine water mist is formed, the wastewater is rapidly vaporized to form water vapor because the temperature of the water vapor is higher than the saturation temperature corresponding to the pressure in the tank, and the water vapor is pumped by the steam injector b17 and is mixed with high-temperature steam. The mixed fluid enters a condenser 18 to be condensed into water which enters a liquid storage tank 19 for storage. At the same time, the other path of sewage from the sewage pump 14 is used as working fluid to drive the jet pump 15 to vacuumize the liquid storage tank 19 and jet the concentrated solution in the flash tank 16, and the jetted mixed solution enters the first grid precipitation cabinet of the two-stage filtering precipitation cabinet for recycling precipitation distillation. The water in the liquid storage tank 19 passes through the centrifugal pump and then reaches the heat exchange pipes of the primary heat exchanger 1, the secondary heat exchanger 2 and the tertiary heat exchanger 3 through pipelines. The steam is changed into working fluid of the steam injector a after heat exchange by the secondary heat exchanger 2, the steam is formed after the third heat exchanger and is used as injection fluid of the steam injector a, and the steam and the injection fluid are mixed in the throat and then are subjected to heat exchange with the treated flue gas through the pipeline to the flue gas heat exchanger. The steam is condensed into water after full heat exchange and then reaches the dispensing box 10 through the centrifugal pump b 21. The dosing tank 10 may be topped with an alkaline solution to form a scrubbing liquid for scrubbing the flue gas, which scrubbing liquid is sprayed from the top of the scrubber tower 7 under pressure from the metering pump 11.
While particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely illustrative, and that many changes and modifications can be made to the embodiments of the invention without departing from the principles and spirit of the invention.
Claims (2)
1. The utility model provides a utilize marine diesel engine waste gas washing water treatment facilities of boats and ships waste heat which characterized in that: comprises a flue gas washing module and a wastewater treatment and recycling module;
the flue gas washing module comprises a heat exchange unit, a washing tower (6), a dosing box (10), a metering pump (11), a chimney (7), a liquid-gas separation device (8), a fan (9), a flue gas heat exchanger (5), a two-stage filtering and precipitating cabinet (12), an electric heater (13) and a sewage pump (14);
the wastewater treatment recycling module comprises a steam ejector, an ejector pump (15), a flash tank (16), a condenser (18), a liquid storage tank (19) and a centrifugal pump a (20);
the heat exchange unit comprises three heat exchangers, wherein the three heat exchangers are a primary heat exchanger (1), a secondary heat exchanger (2) and a tertiary heat exchanger (3) respectively, and the primary heat exchanger (1), the secondary heat exchanger (2) and the tertiary heat exchanger (3) are sequentially connected in series; the high-temperature flue gas pipeline is connected with a washing tower (6) after passing through a primary heat exchanger (1), a secondary heat exchanger (2) and a tertiary heat exchanger (3); the inlets of heat exchange pipes of the primary heat exchanger (1), the secondary heat exchanger (2) and the tertiary heat exchanger (3) are connected with the outlet of the centrifugal pump a (20), and the outlets of the heat exchange pipes of the primary heat exchanger (1), the secondary heat exchanger (2) and the tertiary heat exchanger (3) are respectively connected with the working fluid inlet of the steam injector b (17), the working fluid inlet of the steam injector a (4) and the injection fluid inlet of the steam injector a (4);
an inlet of the flue gas heat exchanger (5) is connected with an outlet of the steam injector a (4), an outlet of the flue gas heat exchanger is connected with an inlet of the dosing box (10) through the centrifugal pump b (21), an inlet of a heat exchange tube of the flue gas heat exchanger (5) is connected with an outlet at the upper part of the chimney (7), and an outlet of the flue gas heat exchanger is connected with an exhaust pipe;
the washing tower (6) is a wet washing tower (6), the upper spray inlet is connected with the outlet of the metering pump (11), and the outlet is respectively connected with the inlet of the two-stage filtration precipitation cabinet (12) and the inlet of the chimney (7); the lower outlet of the chimney (7) is connected with the inlet of the two-stage filtering and precipitating cabinet (12);
the liquid-gas separation device (8) is arranged at the upper part of the chimney (7);
the fan (9) is arranged at the outlet of the upper part of the chimney (7);
the outlet of the two-stage filtering and precipitating cabinet (12) is connected with the inlet of the sewage pump (14);
the electric heater (13) is arranged in the two-stage filtering sedimentation cabinet (12);
the outlet of the sewage pump (14) is respectively connected with the working fluid inlet of the jet pump (15) and the top inlet of the flash tank (16);
the bottom outlet of the flash tank (16) is connected with the liquid injection inlet of the injection pump (15), and the top outlet is connected with the injection inlet of the steam injector b (17);
the gas injection inlet of the jet pump (15) is connected with the liquid storage tank (19), and the outlet is connected with the two-stage filtering and precipitating cabinet (12);
the outlet of the steam jet injector a is connected with the inlet of a condenser (18) through a pipeline;
the top inlet of the liquid storage tank (19) is connected with the outlet of the condenser (18), and the outlet is connected with the inlet of the centrifugal pump a (20);
the top of the dosing box (10) is provided with a dosing port, and the outlet of the dosing box (10) is connected with the inlet of the metering pump (11).
2. The marine diesel engine exhaust gas washing water treatment device using marine waste heat according to claim 1, wherein: the working fluid vapor pressure of the vapor injector a (4) is lower than the working fluid vapor pressure of the vapor injector b (17); the ratio of the ejector throat area of the steam ejector a (4) to the nozzle throat area is 10-50; the ratio of the ejector throat area of the steam ejector b (17) to the nozzle throat area is 50 to 150.
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| CN112250239B true CN112250239B (en) | 2024-04-05 |
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| CN114835302A (en) * | 2022-06-01 | 2022-08-02 | 中船动力研究院有限公司 | Ship exhaust gas recirculation wastewater treatment system and ship |
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| CN1599637A (en) * | 2001-12-05 | 2005-03-23 | 斯奈克玛动力部件公司 | Method and installation for treating flue gas containing hydrocarbons |
| CN102494525A (en) * | 2011-12-15 | 2012-06-13 | 石家庄工大化工设备有限公司 | Process utilizing steam jet pump to recover waste heat of exhaust gas of dryer indirectly |
| CN106746136A (en) * | 2017-03-29 | 2017-05-31 | 广州新普利节能环保科技有限公司 | The technique of zero discharge and system of a kind of desulfurization wastewater |
| CN211752593U (en) * | 2019-11-13 | 2020-10-27 | 浙江三江化工新材料有限公司 | EO takes off aldehyde refining plant in ethylene oxide production |
| CN213569983U (en) * | 2020-11-03 | 2021-06-29 | 大连海事大学 | Ship diesel engine waste gas washing water treatment device utilizing ship waste heat |
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2020
- 2020-11-03 CN CN202011212599.7A patent/CN112250239B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1599637A (en) * | 2001-12-05 | 2005-03-23 | 斯奈克玛动力部件公司 | Method and installation for treating flue gas containing hydrocarbons |
| CN102494525A (en) * | 2011-12-15 | 2012-06-13 | 石家庄工大化工设备有限公司 | Process utilizing steam jet pump to recover waste heat of exhaust gas of dryer indirectly |
| CN106746136A (en) * | 2017-03-29 | 2017-05-31 | 广州新普利节能环保科技有限公司 | The technique of zero discharge and system of a kind of desulfurization wastewater |
| CN211752593U (en) * | 2019-11-13 | 2020-10-27 | 浙江三江化工新材料有限公司 | EO takes off aldehyde refining plant in ethylene oxide production |
| CN213569983U (en) * | 2020-11-03 | 2021-06-29 | 大连海事大学 | Ship diesel engine waste gas washing water treatment device utilizing ship waste heat |
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