CN104316657B - A kind of simulation marine exhaust system for wet scrubbing - Google Patents
A kind of simulation marine exhaust system for wet scrubbing Download PDFInfo
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- CN104316657B CN104316657B CN201410628036.4A CN201410628036A CN104316657B CN 104316657 B CN104316657 B CN 104316657B CN 201410628036 A CN201410628036 A CN 201410628036A CN 104316657 B CN104316657 B CN 104316657B
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Abstract
The invention discloses a kind of simulation marine exhaust system for wet scrubbing, comprising: distribution mixing subsystem, temperature control subsystem, wet scrubbing subsystem and flue gas analysis subsystem; The output terminal of distribution mixing subsystem connects temperature control subsystem, and the output terminal of temperature control subsystem connects wet scrubbing subsystem and flue gas analysis subsystem respectively, and simulated flue gas, after wet scrubbing reaction treatment, is connected with flue gas analysis subsystem through back pressure regulating valve.Beneficial effect is: provide a kind of under the artificial controlled condition in laboratory for studying the simulation marine exhaust system of wet scrubbing technology, system internal gas pressure is constant, flow stable output.Simulation marine exhaust harmful constituent precision is high, can quantitative evaluation wet scrubbing treatment effect, evaluation result reliability, favorable repeatability.Test needs that exhaust gas volumn is few, the test duration is short, testing cost is low.
Description
Technical field
The invention belongs to experimental detection device technical field, particularly relate to the simulation marine exhaust system for wet scrubbing.
Background technology
Along with the continuous expansion of international sea-borne trade, boats and ships discharge of noxious gases total amount is increasing, and the atmospheric pollution caused is also more and more serious.Therefore, in recent years, International Maritime Organization (IMO) (IMO) revises MARPOL pact, has formulated stricter Abgasgesetz for marine exhaust sulphur oxide and oxides of nitrogen.
Be about to successfully manage the marine exhaust TierIII emission standard implemented of honouring an agreement, the research of marine exhaust emission control technique becomes the focus instantly studied.In the middle of numerous desulphurization denitration emission control technique, based on the post-processing technology of wet scrubbing, because it adapts to the sea going particular surroundings of boats and ships preferably, and be easier to install the system reform of spot ship power plant exhaust under the prerequisite do not affected greatly, installation and operation cost is lower, so be subject to extensive concern and primary study.The wet scrubbing technical research of current main flow mainly contains seawater method, sodium alkali and magnesium base method etc.In laboratory conditions, study reaction mechanism and the reaction rate of these wet scrubbing technology, its exhaust-gas treatment effect of quantitative evaluation plays important guidance and reference role by for real ship application.
In prior art, in laboratory conditions wet scrubbing research is carried out to marine exhaust, many employings actual boats and ships engine discharges direct collection mode to carry out, Problems existing is: due to actual boats and ships engine complicated component, and each concentration of component is unstable with working conditions change, and exhaust gas temperature is higher, environmental factor change is more, experimentation repeatability is poor, and reliability is lower, and exhaust gas flow consumption is large, experimentation cost is high.Therefore be not suitable for early-stage Study and explore wet scrubbing reaction mechanism.In addition, namely allow to adopt certain method by Ship Power Equipment gas sampling and store, owing to containing more particle in waste gas, also precipitation and chemical reaction may be there is in long-time storage, original gas composition and concentration is caused to change, and in follow-up use procedure, the dirty stifled impact of piping may be used because of particle.
For the problems referred to above, in prior art, the technology of the actual smoke components of existing simulation, adopts the simulation being realized actual smoke components by the mode of multichannel flow meter mixing match multipath gas." conversion system for flue gas in flue of coal-fired boiler and analogy method thereof " patent of the patent No. to be " a kind of evaluation system for testing SCR denitration performance " of CN201220067290.8 and the patent No. be CN201110185724.4, disclose the flue gas commingled system for simulating coal-burning power plant's smoke evacuation operating mode, but this system can only be used for evaluating gas-solid reaction process, and applicable object only has the smoke modelling of coal-burning power plant or boiler, " engine vent gas catalytic cleaner activation evaluating system " patent of the patent No. to be " a kind of SCR catalyst for denitrating flue gas performance test methods and the proving installation " of CN201010596776.6 and the patent No. be CN200710057638.9, disclose for simulated engine tail gas and the system for evaluating exhaust gas processing device, but there is the pressure surge of exhaust after-treatment procedures system in these systems, the problems such as flowmeter back pressure is unstable, thus can not accurate-metering and evaluate vent gas treatment effect, and system disclosed in above-mentioned patent is not all design for Ship Power Equipment, do not consider the difference that marine exhaust is simulated.
Summary of the invention
For solving the problems referred to above that prior art exists, the invention provides a kind of under the artificial controlled condition in laboratory for studying the simulation marine exhaust system of wet scrubbing technology, precisely-proportioned mixing simulation marine exhaust harmful constituent and concentration thereof, quantitative evaluation wet scrubbing treatment effect, guarantees the reliability of experimental precision and evaluation result.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of simulation marine exhaust system for wet scrubbing, comprise wet scrubbing subsystem C, temperature control subsystem B and flue gas analysis subsystem D, wet scrubbing subsystem C comprises the washing medium feedway and liquid waste treating apparatus that are connected with wet scrubbing reactor respectively, described temperature control subsystem B comprises electric furnace, temperature controller, temperature control electric heating tape and temperature sensing probe, temperature controller is electrically connected with electric furnace and temperature control electric heating tape, temperature sensing probe is connected by signal wire with temperature controller, temperature sensing probe is arranged in washing reactor and imports and exports position, electric furnace import to be exported with simulated flue gas mixing tank by pipeline and three-way mixing valve and is connected, electric furnace outlet is connected with washing reactor import and the import of flue gas sampling gathering-device respectively by pipeline, the pipeline that electric furnace is connected with washing reactor is connected to washing reactor stop valve, the pipeline that electric furnace is connected with flue gas sampling gathering-device is connected to flue gas sampling gathering-device stop valve, the temperature control electric heating tape of temperature control subsystem is arranged in electric furnace and exports on the pipeline that is connected with washing reactor import and the import of flue gas sampling gathering-device, flue gas analysis subsystem D comprises the flue gas sampling gathering-device be connected with flue gas analyzer, it is characterized in that: the described simulation marine exhaust system for wet scrubbing also comprises distribution mixing subsystem A, temperature control subsystem B and back pressure regulating valve, described distribution mixing subsystem A comprises more than 2 simulated flue gas gas cylinders, mass flowmeter and simulated flue gas mixing tank, and each simulated flue gas gas cylinder is connected with simulated flue gas mixing tank respectively by respective mass flowmeter, described back pressure regulating valve belongs to wet scrubbing subsystem C, and back pressure regulating valve is connected between washing reactor outlet and the import of flue gas sampling gathering-device by pipeline.
A kind of simulation marine exhaust system for wet scrubbing of the present invention, it is characterized in that: each simulated flue gas gas cylinder of described distribution mixing subsystem A mixes in tank connected pipeline respectively by respective mass flowmeter with simulated flue gas, also be connected with reduction valve, filtrator and T-valve in turn in pipeline between simulated flue gas gas cylinder and mass flowmeter, in the pipeline between mass flowmeter and simulated flue gas mixing tank, be also connected with retaining valve and stop valve in turn.
A kind of simulation marine exhaust system for wet scrubbing of the present invention, is characterized in that: described wet scrubbing reactor is bubbling style reactor.
A kind of simulation marine exhaust system for wet scrubbing of the present invention, is characterized in that: described temperature sensing probe is thermopair.
The using method of a kind of simulation marine exhaust system for wet scrubbing of the present invention, is characterized in that: described using method comprises the following steps:
1) system boot, before normal operation, closes washing reactor stop valve, opens flue gas sampling gathering-device stop valve,
2) opened by the simulated flue gas gas cylinder being filled with normal mixture body, the gas in each simulated flue gas gas cylinder after decompression, filtrator, then after selecting gas circuit outbound course by T-valve, enters respective mass flowmeter,
3) the target mixed gas composition configured as required and concentration and mixed gas total flow require and simulated flue gas gas cylinder internal standard gas concentration, regulate the gas flow that each mass flowmeter exports,
4) open check valve and stop valve, after each simulated flue gas cylinder gas flows through retaining valve and stop valve, enter after simulated flue gas mixing tank fully mixes, exported by simulated flue gas mixing tank and export, what export is the target mixed gas composition, concentration and the flow that need configuration
5) exported the mixed gas exported by simulated flue gas mixing tank to enter after electric furnace heating through outlet output through three-way mixing valve, after flue gas sampling gathering-device stop valve enters flue gas sampling gathering-device, enter flue gas analyzer, flue gas analyzer detects the mixed gas entered
6) after system is normally run, open washing reactor stop valve, close flue gas sampling gathering-device stop valve,
7) temperature of temperature sensing probe Real-time Collection washing reactor import and export mixed gas, by the temperature input temperature controller gathered, temperature controller controls the electric power of electric furnace and temperature control electric heating tape, and closed loop adjustment enters the mixed gas temperature of washing reactor
8) mixed gas is exported by washing reactor and enters flue gas analyzer through flue gas sampling gathering-device after washing reactor reaction, flue gas analyzer measures mixed gas composition and concentration, measurement result and step 4) the original mixed gas componant that records compares with concentration, draw objectionable constituent removal efficiency in simulation marine exhaust, removal efficiency is according to following formulae discovery:
Compared with prior art, the present invention has following beneficial effect:
1. present invention employs back pressure regulating valve, distribution mixing subsystem can be maintained and wet scrubbing subsystem internal gas pressure is constant, thus guarantee flowmeter stable output, not the fluctuation of Yin Wendu or pressure and misalignment;
2. compare the mode of directly collecting boats and ships engine research post-processing technology, adopt simulation marine exhaust mode, by the dynamic mixed preparing process of multiplexer channel, can accuracy controlling mixed gas total flow, composition, concentration and temperature variation, there is provided that source of the gas is stable, repeatable experiment condition, outstanding main harmful gas componant, reduces the interference of other impurity component;
3. are little type simulated marine exhaust systems of a set of quantitative evaluation exhaust-gas treatment effect, test evaluation process only needs a small amount of flue gas, the test duration is short, testing cost is low, can before shiphoard measurement and the full-scale wet scrubbing device of evaluation, quantitative expedition wet scrubbing effect is with the situation of change of exhaust gas temperature, composition and concentration, thus reduce test verification cost, shorten evaluation cycle.
Accompanying drawing explanation
Fig. 1 is the general frame figure of simulation marine exhaust system,
Fig. 2 is simulation marine exhaust system architecture schematic diagram.
In Fig. 2: with solid line be connected for pipeline connect, dotted line be connected for electrical connection, each parts label is respectively:
1 ~ 6 mass flowmeter 31 ~ 36 retaining valve 37-~ 42, simulated flue gas gas cylinder 7 ~ 12 reduction valve 13 ~ 18 filtrator 19 ~ 24 T-valve 25-~ 30, 43 simulated flue gas mixing tank 44 three-way mixing valve 45 water vapor generation device 46 electric furnace 47 temperature controllers 48, flue gas sampling gathering-device stop valve 49, washing reactor stop valve 50 wet scrubbing reactor 51 washing medium feedway 52 liquid waste treating apparatus 53 back pressure regulating valve 54 temperature control electric heating tape 55 flue gas sampling gathering-device 56 flue gas analyzer
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
The simulation marine exhaust system for wet scrubbing as shown in Figure 1, includes: for the distribution mixing subsystem A of proportioning mixed gas simulation Ship Power Equipment real ship working condition waste gas; For studying the temperature control subsystem B of exhaust gas temperature to wet scrubbing influential effect rule; The wet scrubbing subsystem C that the simulation marine exhaust of uniform temperature and washing medium solution are reacted; The flue gas analysis subsystem D of each component gas composition and concentration change in marine exhaust is simulated before and after quantitative measurment reactor.Wherein, the output terminal of distribution mixing subsystem A directly connects temperature control subsystem B, after heating and thermal insulation process, and the marine exhaust of different exhaust gas temperature under the different operating mode of the real ship Ship Power Equipment of formation simulation.The output terminal of temperature control subsystem B connects wet scrubbing subsystem C and flue gas analysis subsystem D respectively, and simulated flue gas is after wet scrubbing reaction treatment, and wet scrubbing subsystem C is connected with flue gas analysis subsystem D again.
Fig. 2 is the simulation marine exhaust system for wet scrubbing having 6 simulated flue gas gas cylinders 1 ~ 6, wet scrubbing subsystem C comprises the washing medium feedway 51 and liquid waste treating apparatus 52 that are connected with wet scrubbing reactor 50 respectively, and wet scrubbing reactor 50 is bubbling style reactor, flue gas analysis subsystem D comprises the flue gas sampling gathering-device 55 be connected with flue gas analyzer 56, distribution mixing subsystem A comprises 6 simulated flue gas gas cylinders 1 ~ 6, 6 mass flowmeters 25 ~ 30 and simulated flue gas mixing tank 43, each simulated flue gas gas cylinder 1 ~ 6 is connected with simulated flue gas mixing tank 43 respectively by respective mass flowmeter 25 ~ 30, reduction valve 7 ~ 12 is connected with in turn in pipeline between each simulated flue gas gas cylinder 1 ~ 6 and mass flowmeter 25 ~ 30, filtrator 13 ~ 18 and T-valve 19 ~ 24, retaining valve 31 ~ 36 and stop valve 37 ~ 42 is also connected with in turn in pipeline between mass flowmeter 25 ~ 30 and simulated flue gas mixing tank 43, simulated flue gas mixing tank 43 output pipe is connected with water vapor generation device 45, molecular sieve filling is filled with in simulated flue gas mixing tank 43, temperature control subsystem B comprises electric furnace 46, temperature controller 47, temperature control electric heating tape 54 and temperature thermocouple, temperature controller 47 is electrically connected with electric furnace 46 and temperature control electric heating tape 54, temperature thermocouple is connected by signal wire with temperature controller 47, temperature thermocouple is arranged in washing reactor 50 and imports and exports position, electric furnace 46 import to be exported with simulated flue gas mixing tank 43 by pipeline and three-way mixing valve 44 and is connected, electric furnace 46 is exported and is connected with washing reactor 50 import and flue gas sampling gathering-device 55 import respectively by pipeline, the pipeline that electric furnace 46 is connected with washing reactor 50 is connected to washing reactor stop valve 49, the pipeline that electric furnace 46 is connected with flue gas sampling gathering-device 55 is connected to flue gas sampling gathering-device stop valve 48, the temperature control electric heating tape 54 of temperature control subsystem B is arranged in electric furnace 46 and exports on the pipeline that is connected with washing reactor 50 import and flue gas sampling gathering-device 55 import, back pressure regulating valve 53 belongs to wet scrubbing subsystem C, and back pressure regulating valve 53 is connected to washing reactor 50 by pipeline and exports between flue gas sampling gathering-device 55 import.
Distribution mixing subsystem A is used for the main harmful constituent of quantitative simulation marine exhaust and concentration thereof, the simulated flue gas gas cylinder 1 ~ 6 being filled with normal mixture body is opened, each road gas is after reduction valve 7 ~ 12 and filtrator 13 ~ 18, after selecting gas circuit outbound course by T-valve 19 ~ 24 again, enter respective mass flowmeter 25 ~ 30.According to gas cylinder 1 ~ 6 internal standard gas concentration, the target mixed gas composition of configuration and concentration and mixed gas total flow is needed to require to calculate and regulate each branch road to need the gas flow exported, opening stop valve 37 ~ 42, after each road gas flowing through one-way valve 31 ~ 36 and stop valve 37 ~ 42, enter the simulated flue gas mixing tank 43 that molecular sieve filling is housed fully to mix, the composition and the concentration that export gas pass through adjust flux accuracy controlling.Export with simulated flue gas mixing tank 43 water vapor generation device 45 be connected, can experimentally need, regulate water vapor to add the amount of mixed gas by three-way mixing valve 44.
Temperature control subsystem B is for simulating the exhaust gas temperature under the different operating mode of real ship Ship Power Equipment, and research different temperatures is to the affecting laws of wet scrubbing exhaust-gas treatment effect.Thermopair gathers mixed gas temperature input temperature controller 47, control the electric power of electric furnace 46 and temperature control electric heating tape 54, closed loop adjustment enters the mixed flue gas temperature of washing reactor 50, and the temperature variation that Real-Time Monitoring washing reactor is imported and exported, research wet scrubbing chemical reaction thermodynamic process and exhaust gas temperature are to the affecting laws of wet scrubbing effect.
Wet scrubbing subsystem C is used for carrying out wet scrubbing study on mechanism, and wet scrubbing reactor 50 is bubbling style reactor, by regulating bubbling size and the residence time of bubble in solution, controls contact area and the duration of contact of gas liquid reaction; Washing medium feedway 51, for providing wet scrubbing absorbing liquid, regulates absorbing liquid quantity delivered; Liquid waste treating apparatus 52 for separating of with purification wet scrubbing waste liquid, reduce secondary environmental pollution; Back pressure regulating valve 53 is constant for guaranteeing whole simulated flue gas system internal gas pressure, reduces the flowmeter outlet pipeline air pressure fluctuation because the processes such as chemical reaction cause.
Flue gas analysis subsystem D is used for calibration gas mixture body and exports composition and concentration, and quantitative evaluation wet scrubbing exhaust-gas treatment effect.Before system boot normally runs, close washing reactor stop valve 49, open flue gas sampling gathering-device stop valve 48, export mixed gas with distribution mixing subsystem A and sweep residual gas in clean piping, mixed gas sent into by flue gas sampling gathering-device 55 mixed gas that flue gas analyzer 56 is used for calibrating output; After system stability normally works, open washing reactor stop valve 49, close flue gas sampling gathering-device stop valve 48, by flue gas sampling gathering-device 55, reacted for wet scrubbing mixed gas is sent into flue gas analyzer 56, measure mixed gas composition and concentration change.By measuring harmful gas concentration change before and after washing reactor reaction, the removal efficiency of objectionable constituent in simulation marine exhaust can be drawn by following formula.
Claims (4)
1. the simulation marine exhaust system for wet scrubbing, comprise wet scrubbing subsystem C, temperature control subsystem B and flue gas analysis subsystem D, wet scrubbing subsystem C comprises the washing medium feedway (51) and liquid waste treating apparatus (52) that are connected with wet scrubbing reactor (50) respectively, temperature control subsystem B comprises electric furnace (46), temperature controller (47), temperature control electric heating tape (54) and temperature sensing probe, temperature controller (47) is electrically connected with electric furnace (46) and temperature control electric heating tape (54), temperature sensing probe is connected by signal wire with temperature controller (47), temperature sensing probe is arranged in washing reactor (50) and imports and exports position, electric furnace (46) import to be exported with simulated flue gas mixing tank (43) by pipeline and three-way mixing valve (44) and is connected, electric furnace (46) outlet is connected with washing reactor (50) import and flue gas sampling gathering-device (55) import respectively by pipeline, the pipeline that electric furnace (46) is connected with washing reactor (50) is connected to washing reactor stop valve (49), the pipeline that electric furnace (46) is connected with flue gas sampling gathering-device (55) is connected to flue gas sampling gathering-device stop valve (48), the temperature control electric heating tape (54) of temperature control subsystem (B) is arranged in electric furnace (46) and exports on the pipeline that is connected with washing reactor (50) import and flue gas sampling gathering-device (55) import, flue gas analysis subsystem D comprises the flue gas sampling gathering-device (55) be connected with flue gas analyzer (56), it is characterized in that: the described simulation marine exhaust system for wet scrubbing also comprises distribution mixing subsystem A and back pressure regulating valve (53), described distribution mixing subsystem A comprises simulated flue gas gas cylinder (1, 2, 3, 4, 5, 6), mass flowmeter (25, 26, 27, 28, 29, 30) and simulated flue gas mixing tank (43), wherein simulated flue gas gas cylinder (1, 2, 3, 4, 5, 6) and mass flowmeter (25, 26, 27, 28, 29, 30) be more than 2, each simulated flue gas gas cylinder (1, 2, 3, 4, 5, 6) respectively by respective mass flowmeter (25, 26, 27, 28, 29, 30) be connected with simulated flue gas mixing tank (43), at simulated flue gas gas cylinder (1, 2, 3, 4, 5, 6) with mass flowmeter (25, 26, 27, 28, 29, 30) reduction valve (7 is also connected with in turn in the pipeline between, 8, 9, 10, 11, 12), filtrator (13, 14, 15, 16, 17, 18) and T-valve (19, 20, 21, 22, 23, 24), at mass flowmeter (25, 26, 27, 28, 29, 30) retaining valve (31 is also connected with in turn in the pipeline and between simulated flue gas mixing tank (43), 32, 33, 34, 35, 36) and stop valve (37, 38, 39, 40, 41, 42, ), described back pressure regulating valve (53) is included in wet scrubbing subsystem (C), and back pressure regulating valve (53) is connected between washing reactor (50) outlet and flue gas sampling gathering-device (55) import by pipeline.
2. a kind of simulation marine exhaust system for wet scrubbing according to claim 1, is characterized in that: described wet scrubbing reactor (50) is bubbling style reactor.
3. a kind of simulation marine exhaust system for wet scrubbing according to claim 1, is characterized in that: described temperature sensing probe is thermopair.
4. the analogy method of a kind of simulation marine exhaust system for wet scrubbing according to claim 1, is characterized in that: described analogy method comprises the following steps:
1) system boot, before normal operation, closes washing reactor stop valve (49), opens flue gas sampling gathering-device stop valve (48),
2) the simulated flue gas gas cylinder (1,2,3,4,5,6) being filled with normal mixture body is opened, gas in each simulated flue gas gas cylinder is after reduction valve (7,8,9,10,11,12), filtrator (13,14,15,16,17,18), after selecting gas circuit outbound course by T-valve (19,20,21,22,23,24) again, enter respective mass flowmeter (25,26,27,28,29,30)
3) the target mixed gas composition configured as required and concentration and mixed gas total flow require and simulated flue gas gas cylinder (1,2,3,4,5,6) internal standard gas concentration, regulate the gas flow that each mass flowmeter (25,26,27,28,29,30) exports
4) open check valve (31,32,33,34,35,36) and stop valve (37,38,39,40,41,42), after each simulated flue gas gas cylinder (1,2,3,4,5,6) gas flowing through one-way valve and stop valve, enter after simulated flue gas mixing tank (43) fully mixes, exported by simulated flue gas mixing tank (43) and export, what export is the target mixed gas composition, concentration and the flow that need configuration
5) exported the mixed gas exported by simulated flue gas mixing tank (43) to enter after electric furnace (46) heating through outlet output through three-way mixing valve (44), enter after flue gas sampling gathering-device (55) through flue gas sampling gathering-device stop valve (48), enter flue gas analyzer (56), flue gas analyzer (56) detects the mixed gas entered
6) after system is normally run, open washing reactor stop valve (49), close flue gas sampling gathering-device stop valve (48),
7) temperature of temperature sensing probe Real-time Collection washing reactor import and export mixed gas, by temperature input temperature controller (47) gathered, temperature controller (47) controls the electric power of electric furnace (46) and temperature control electric heating tape (54), closed loop adjustment enters the mixed gas temperature of washing reactor (50)
8) mixed gas is exported by washing reactor (50) and enters flue gas analyzer (56) through flue gas sampling gathering-device (55) after washing reactor (50) reaction, flue gas analyzer (56) measures mixed gas composition and concentration, measurement result and step 4) the original mixed gas componant that records compares with concentration, draw objectionable constituent removal efficiency in simulation marine exhaust, removal efficiency is according to following formulae discovery:
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| CN107875810B (en) * | 2017-10-24 | 2020-05-19 | 武汉船用机械有限责任公司 | Test system and method for washing tower of inert gas system |
| CN108415265B (en) * | 2018-01-26 | 2021-04-30 | 青岛双瑞海洋环境工程股份有限公司 | Ship exhaust gas denitration function analog simulation system |
| CN109283023B (en) * | 2018-11-06 | 2024-04-16 | 华北电力大学（保定） | Experimental device for simulating influence of smoke content on sulfur trioxide concentration and application method |
| CN109459536A (en) * | 2018-12-29 | 2019-03-12 | 徐州治鼎环境科技有限公司 | A kind of high humidity low concentration dust generator |
| CN110333326B (en) * | 2019-08-07 | 2024-04-16 | 马鞍山钢铁股份有限公司 | Sintering circulation flue gas simulation system and experimental method |
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