CN110743365A - Engine test bed tail gas treatment system and application method thereof - Google Patents
Engine test bed tail gas treatment system and application method thereof Download PDFInfo
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- CN110743365A CN110743365A CN201911161484.7A CN201911161484A CN110743365A CN 110743365 A CN110743365 A CN 110743365A CN 201911161484 A CN201911161484 A CN 201911161484A CN 110743365 A CN110743365 A CN 110743365A
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- 238000012360 testing method Methods 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 436
- 239000007921 spray Substances 0.000 claims abstract description 264
- 239000003513 alkali Substances 0.000 claims abstract description 58
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 35
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 238000005507 spraying Methods 0.000 claims description 58
- 239000000498 cooling water Substances 0.000 claims description 35
- 238000012856 packing Methods 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 16
- 239000010865 sewage Substances 0.000 claims description 15
- 239000008213 purified water Substances 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 239000002351 wastewater Substances 0.000 claims description 11
- 239000008399 tap water Substances 0.000 claims description 9
- 235000020679 tap water Nutrition 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 70
- 238000010586 diagram Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
- B01D53/526—Mixtures of hydrogen sulfide and carbon dioxide
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
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Abstract
An engine test bed tail gas treatment system comprises a first alkali liquor spray tower, a second alkali liquor spray tower, a circulating water tank, a variable-frequency diffuser, a wastewater treatment device and a closed cooling tower; one side surface of the circulating water pool is provided with a mounting hole for mounting a variable frequency diffuser, the variable frequency diffuser is horizontally and fixedly mounted in the circulating water pool after penetrating through the mounting hole, alkaline circulating water is filled in the circulating water pool, and the variable frequency diffuser is positioned above the alkaline circulating water; according to the tail gas treatment system of the engine test bed and the use method thereof, the tail gas treatment of the engine test bed is realized by arranging the closed circulating water tank and 2 sets of alkaline spray beds, so that the gas discharged from the gas outlet of the alkaline spray tower meets the national pollutant emission standard.
Description
Technical Field
The invention relates to the technical field of engine test environmental protection, in particular to an engine test bed tail gas treatment system and a using method thereof.
Background
The engine test is one of necessary links for putting and using the aerospace engines such as the turbofan engine, the solid-impact engine and the like, the engine test bed is a necessary condition of the engine test, the main components of gas exhausted by the engine test bed are carbon dioxide and hydrogen sulfide and contain certain particulate matters, the particulate matters mainly comprise diboron trioxide and magnesium oxide, if the waste gas exhausted by the test bed is directly exhausted into the atmosphere, the pollution to the atmosphere is extremely large, the generation of acid rain is caused, meanwhile, the exhausted particulate matters form pollutants such as PM10 and PM2.5 to pollute the atmosphere, the engine test bed is extremely environment-friendly, and in the prior art, a mature and effective method for treating tail gas of the engine test bed of the aerospace engines such as the turbofan engine, the solid-impact engine and the like does not exist.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the tail gas treatment system of the engine test bed and the use method thereof are provided.
The technical solution of the invention is as follows: an engine test bed tail gas treatment system comprises a first alkali liquor spray tower, a second alkali liquor spray tower, a circulating water tank, a variable-frequency diffuser, a wastewater treatment device and a closed cooling tower; one side surface of the circulating water pool is provided with a mounting hole for mounting a variable frequency diffuser, the variable frequency diffuser is horizontally and fixedly mounted in the circulating water pool after penetrating through the mounting hole, alkaline circulating water is filled in the circulating water pool, and the variable frequency diffuser is positioned above the alkaline circulating water;
the first alkali liquor spray tower and the second alkali liquor spray tower are identical in structure and are fixedly arranged on the upper surface of the circulating water tank, and air inlets of the spray towers of the first alkali liquor spray tower and the second alkali liquor spray tower are communicated with an exhaust port, located above an alkaline circulating water level, of the circulating water tank through a pipeline and used for exhausting tail gas of an engine test bed exhausted by the variable-frequency diffuser;
the waste water treatment equipment is fixedly arranged on the upper surface of the circulating water tank, a waste water inlet of the waste water treatment equipment is communicated with the drain outlets of the spray towers of the first alkali liquor spray tower and the second alkali liquor spray tower through pipelines, a water outlet of the waste water treatment equipment is communicated with a water inlet, positioned above the alkaline circulating water level, of the circulating water tank and used for introducing purified water through a pipeline, and a valve is arranged at a water inlet, positioned above the alkaline circulating water level, of the circulating water tank and used for introducing purified water;
closed cooling tower fixed mounting is at circulating water tank's upper surface, and the water inlet of closed cooling tower passes through the pipeline and is used for deriving the delivery port intercommunication of alkaline circulating water with the circulating water pond below being located alkaline circulating water level, the delivery port of closed cooling tower passes through the pipeline and the circulating water pond be located the cooling water inlet intercommunication that is used for introducing the cooling water of alkaline circulating water level top, the cooling water inlet department that is used for introducing the cooling water and the delivery port that is used for deriving alkaline circulating water that is located alkaline circulating water level below of circulating water pond that is located alkaline circulating water level top all are provided with the valve.
Further, the first alkali liquor spray tower comprises a spray tower body, a spray tower air inlet, a spray tower air outlet, a spray tower alkali liquor inlet, a spray tower first packing layer, a spray tower first spray system, a spray tower second packing layer, a spray tower second spray system, a spray tower liquid level meter, a spray tower circulating pump, a spray tower overflow port, a spray tower drain outlet and a spray tower maintenance port; the spray tower body is of a hollow cylindrical structure, a spray tower air inlet, a spray tower alkali liquor inlet, a spray tower overflow port, a spray tower drain outlet and a spray tower maintenance port are arranged on the side part of the spray tower body, and a spray tower air outlet is arranged on the top of the spray tower body; the spraying tower circulating pump is arranged outside the tower body of the spraying tower and is used for pumping out the alkaline circulating water in the circulating water tank and conveying the alkaline circulating water to the first spraying system of the spraying tower and the second spraying system of the spraying tower through the conveying pipeline for conveying the alkaline circulating water to the spraying system; a valve is arranged at an alkaline circulating water conveying port of the circulating water tank, which is positioned below the alkaline circulating water level and used for conveying alkaline circulating water, the arrangement position of an overflow port of the spray tower is higher than that of an air inlet of the spray tower, an alkaline liquor inlet of the spray tower and a drain outlet of the spray tower are arranged, and the drain outlet of the spray tower is communicated with a wastewater inlet of wastewater treatment equipment through a pipeline; along the axis of the spray tower body, a first packing layer of the spray tower, a first spraying system of the spray tower, a second packing layer of the spray tower and a second spraying system of the spray tower are sequentially and fixedly installed inside the spray tower body from bottom to top, and a liquid level meter of the spray tower is arranged on the lower portion of the first packing layer of the spray tower on the side portion of the spray tower body and used for monitoring the water level of wastewater at the bottom of the spray tower body.
Furthermore, the variable-frequency diffuser comprises a variable-frequency diffuser cylinder and a variable-frequency diffuser diversion cone, the variable-frequency diffuser cylinder is a hollow circular cylinder, a plurality of variable-frequency diffuser air outlet holes used for discharging gas are formed in the surface of the cylinder, and the variable-frequency diffuser air outlet holes are through holes penetrating through the circular cylinder; the frequency conversion diffuser water conservancy diversion awl is the cone type, and the conical surface of frequency conversion diffuser water conservancy diversion awl sets up inside circular cylinder, and the bottom excircle diameter of frequency conversion diffuser water conservancy diversion awl is the same with circular cylinder's internal diameter, and the bottom excircle and a circular cylinder terminal surface fixed connection of frequency conversion diffuser water conservancy diversion awl will frequency conversion diffuser cylinder one end seal.
Furthermore, the circulating water tank is provided with a water injection port for injecting municipal tap water.
Furthermore, the circulating water tank is provided with a drain outlet which is discharged into the sewage treatment system.
Furthermore, a detector for detecting the pH value of the alkaline circulating water in the circulating water tank, a thermometer for detecting the alkaline circulating water in the circulating water tank and a liquid level meter for displaying the level of the alkaline circulating water in the circulating water tank are arranged in the circulating water tank.
Furthermore, the circulating water tank is provided with a feed opening for feeding alkaline materials so as to ensure that the pH value of the alkaline circulating water in the circulating water tank reaches a preset value.
The method for treating the tail gas of the engine test bed by using the tail gas treatment system of the engine test bed comprises the following steps:
s100), starting a spraying system
S110), keeping a valve arranged at a water inlet, which is arranged above an alkaline circulating water level and used for introducing clean water, of the circulating water tank, closing valves at a cooling water inlet, which is arranged above the alkaline circulating water level and used for introducing cooling water, and a water outlet, which is arranged below the alkaline circulating water level and used for leading out alkaline circulating water, and opening a valve at an alkaline circulating water delivery port, which is arranged below the alkaline circulating water level and used for delivering alkaline circulating water, of the circulating water tank;
s120), starting a circulating pump of the spray tower to pump out the alkaline circulating water in the circulating water tank and conveying the alkaline circulating water to a first spray system of the spray tower and a second spray system of the spray tower through a conveying pipeline for conveying the alkaline circulating water to the spray system, starting the first spray system and the second spray system of the spray tower, starting the alkaline circulating water to spray, and keeping the circulating pump of the spray tower, the first spray system and the second spray system of the spray tower to work;
s200) and tail gas treatment
S210) engine test, wherein tail gas of an engine test bed is discharged from an exhaust system (the exhaust system can be an exhaust pipeline, an ejector and the like), enters from the end face of one open end of a cylinder body of a variable-frequency diffuser, is guided by a guide cone of the variable-frequency diffuser, is discharged from a plurality of air outlet holes of the variable-frequency diffuser, and then respectively enters a first alkali liquor spray tower and a spray tower air inlet of a second alkali liquor spray tower through an exhaust port and a spray tower air inlet pipeline which are communicated with a circulating water tank and are positioned above an alkaline circulating water level and used for discharging the tail gas of the engine test bed discharged by the variable-frequency diffuser;
s220), after sequentially passing through a first packing layer and a second packing layer of the spray tower, engine test bed tail gas entering a gas inlet of the spray tower is discharged from a gas outlet of the spray tower, and when the engine test bed tail gas passes through the first packing layer and the second packing layer of the spray tower, alkaline circulating water and the engine test bed tail gas are subjected to degradation treatment;
s300), closing the spraying system
After the engine test is finished, when the time reaches a preset time, preferably 2-4 hours, further preferably 3 hours after the test is finished, closing the circulating pump of the spray tower, and closing a valve at an alkaline circulating water delivery port for delivering alkaline circulating water, which is arranged below the alkaline circulating water level, of the circulating water tank after the first spray system and the second spray system of the spray tower;
s400), wastewater treatment
S410), keeping a valve which is positioned above an alkaline circulating water level and used for introducing cooling water, a valve which is positioned below the alkaline circulating water level and used for leading out alkaline circulating water, and a valve which is arranged at an alkaline circulating water delivery port of a circulating water tank and used for delivering alkaline circulating water and is positioned below the alkaline circulating water level and used for delivering alkaline circulating water to be closed, opening the valve which is arranged at the water inlet of the circulating water tank and used for introducing purified water and a spray tower drain outlet, starting the wastewater treatment equipment, discharging the wastewater in the first alkaline liquid spray tower and the second alkaline liquid spray tower through the spray tower drain outlet, entering the wastewater treatment equipment for purification treatment, entering a water outlet of the wastewater treatment equipment through a pipeline, entering a water inlet of the circulating water tank and used for introducing purified water and positioned above the alkaline circulating water level, and then flowing into the circulating;
s420), after the spraying tower liquid level meter displays that no sewage exists in the first alkali liquor spraying tower and the second alkali liquor spraying tower, closing the wastewater treatment equipment, and respectively closing a valve arranged at a water inlet for introducing clean water and a spraying tower sewage outlet which are arranged above an alkaline circulating water level of the circulating water tank;
s500), cooling alkaline circulating water
S510), keeping a valve arranged at a water inlet for introducing purified water above an alkaline circulating water level of a circulating water tank and a valve arranged at an alkaline circulating water delivery port for delivering alkaline circulating water below the alkaline circulating water level of the circulating water tank closed, opening a cooling water inlet for introducing cooling water above the alkaline circulating water level and a valve arranged at a water outlet for leading out alkaline circulating water below the alkaline circulating water level, starting a closed cooling tower, enabling the alkaline circulating water in the circulating water tank to enter the circulating water tank through the cooling water inlet for introducing cooling water above the alkaline circulating water level after entering the closed cooling tower for cooling through the water outlet for leading out alkaline circulating water below the alkaline circulating water level until a thermometer for detecting the alkaline circulating water in the circulating water tank displays that the temperature of the alkaline circulating water in the circulating water tank is not higher than a preset value, preferably, the predetermined value is 30 ℃.
Furthermore, after the engine test, alkaline materials are put in through a feeding port which is arranged in the circulating water tank and used for putting in the alkaline materials, so that the pH value of the alkaline circulating water in the circulating water tank reaches a preset value.
Further, when the water level of the alkaline circulating water in the circulating water tank is lower than a preset value, tap water is injected through a water injection port which is arranged in the circulating water tank and is used for injecting municipal tap water.
Compared with the prior art, the invention has the advantages that:
1. according to the tail gas treatment system of the engine test bed and the use method thereof, the tail gas of the engine test bed is treated by arranging the closed circulating water tank and 2 sets of alkaline spray beds, so that gas discharged from the gas outlet of the alkaline spray tower meets the national pollutant emission standard, the 2 sets of alkaline spray beds connected in parallel are arranged, the tail gas of the engine test bed is divided into 2 paths for alkaline spraying, the flow velocity of the tail gas of the engine test bed passing through the alkaline spray towers is reduced, the alkaline spray process is more sufficient, the workload of each alkaline spray tower is reduced, and the alkaline spray is further sufficiently carried out.
2. According to the tail gas treatment system for the engine test bed and the use method of the tail gas treatment system, the variable-frequency diffuser is creatively arranged in the closed circulating water tank, the gas containing volume in the circulating water tank is larger than that of the variable-frequency diffuser, so that the tail gas exhausted by the engine test bed is buffered in the closed circulating water tank for one time, the flow velocity of the tail gas of the engine test bed is reduced, and the subsequent alkali spraying is fully carried out when the gas enters the alkali spraying tower.
3. According to the engine test bed tail gas treatment system and the using method thereof, the cone-shaped variable frequency diffuser diversion cone is arranged in the variable frequency diffuser to divert the gas entering the variable frequency diffuser cylinder, so that the gas entering the variable frequency diffuser cylinder is uniformly discharged from the plurality of variable frequency diffuser gas outlet holes, can be uniformly filled in the gas containing volume in the circulating water pool, and is favorable for buffering the gas and subsequent alkaline spraying.
4. According to the engine test bed tail gas treatment system and the use method thereof, the 2-layer spraying system is creatively arranged in each alkaline spraying tower, so that spraying is more thorough.
5. According to the engine test bed tail gas treatment system and the use method thereof, the filler layer filled with the ceramic material is arranged in each layer of spraying system, so that the treatment capacity of the alkaline spraying tower is greatly improved.
6. According to the engine test bed tail gas treatment system and the use method thereof, the recycling of alkaline circulating water is realized by arranging the circulating water tank, the waste water treatment equipment and the closed cooling tower, and the test cost is greatly reduced.
Drawings
FIG. 1 is a schematic structural diagram of an engine test stand exhaust treatment system of the present invention.
Fig. 2 is a schematic structural view of an internal structure of an engine test stand exhaust gas treatment system capable of embodying the present invention.
FIG. 3 is a schematic structural diagram of an alkali liquor spray tower in the tail gas treatment system of the engine test stand of the present invention.
FIG. 4 is a schematic structural diagram of a variable frequency diffuser in an angular direction in the engine test stand exhaust treatment system of the present invention.
FIG. 5 is a schematic structural view of a variable frequency diffuser at another angular orientation in the engine test stand exhaust treatment system of the present invention.
FIG. 6 is a schematic structural diagram of a flow guide cone of a variable frequency diffuser in the exhaust treatment system of the engine test bed of the present invention.
Detailed Description
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "abutted" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides an engine test bench tail gas processing system, especially an aerospace engine test bench tail gas processing system such as turbofan engine, solid towards engine, includes first alkali lye spray column 100, second alkali lye spray column 200, circulating water pond 300, frequency conversion diffuser 400, waste water treatment equipment 500 and closed cooling tower 600.
The circulating water tank 300 is of a closed reinforced concrete structure, a mounting hole for mounting the variable frequency diffuser 400 is formed in one side surface of the circulating water tank, the variable frequency diffuser 400 penetrates through the mounting hole and then is horizontally and fixedly mounted in the circulating water tank 300, alkaline circulating water is filled in the circulating water tank 300, and the variable frequency diffuser 400 is located above the alkaline circulating water.
The first alkali liquor spray tower 100 and the second alkali liquor spray tower 200 are identical in structure and fixedly mounted on the upper surface of the circulating water tank 300, and the spray tower air inlets 102 of the first alkali liquor spray tower 100 and the second alkali liquor spray tower 200 are communicated with an exhaust port (not shown in the figure) of the circulating water tank 300, which is located above the alkaline circulating water level and used for exhausting tail gas of an engine test bed exhausted by the variable-frequency diffuser 400, through a pipeline.
The wastewater treatment apparatus 500 is a conventional art, is fixedly installed on the upper surface of the circulation tank 300, and a wastewater inlet (not shown in the figure) of the wastewater treatment equipment 500 is communicated with the spray tower sewage discharge port 112 of the first alkali liquor spray tower 100 and the second alkali liquor spray tower 200 through pipelines, the water outlet (not shown in the figure) of the wastewater treatment equipment 500 is communicated with the water inlet (not shown in the figure) which is positioned above the alkaline circulating water level and used for introducing purified water of the circulating water tank 300 through a pipeline, and sewage discharged from the spray tower sewage outlet 112 of the first alkali liquor spray tower 100 and the second alkali liquor spray tower 200 enters the wastewater treatment equipment 500 after being purified and treated, the water outlet of the wastewater treatment equipment 500 enters the circulating water tank 300 through the water inlet which is positioned above the alkaline circulating water level and used for introducing purified water of the circulating water tank 300. Preferably, a valve is disposed at a water inlet of the circulation water tank 300, which is located above the alkaline circulation water level and used for introducing clean water, and is closed when tail gas of the engine test bed enters the circulation water tank 300, and is opened when tail gas of the engine test bed does not exist in the circulation water tank 300 and the wastewater treatment equipment 500 works.
The closed cooling tower 600 is a conventional art, is fixedly installed on the upper surface of the circulation water tank 300, and a water inlet (not shown) of the closed cooling tower 600 is communicated with a water outlet (not shown) of the circulating water tank 300 below the alkaline circulating water level for leading out alkaline circulating water through a pipeline, a water outlet (not shown) of the closed cooling tower 600 is communicated with a cooling water inlet (not shown) for introducing cooling water above the alkaline circulation water level of the circulation water tank 300 through a pipeline, the alkaline circulating water in the circulating water tank 300 enters the water inlet of the closed cooling tower 600 through a pipeline, is cooled by the closed cooling tower 600, is discharged from the water outlet for leading out the alkaline circulating water through a pipeline, enters the circulating water tank 300 from the cooling water inlet for leading in the cooling water above the alkaline circulating water level of the circulating water tank 300. Preferably, a cooling water inlet for introducing cooling water above the alkaline circulation water level and a water outlet for leading out alkaline circulation water below the alkaline circulation water level of the circulation water tank 300 are provided with valves, the valves are closed when tail gas of the engine test bed enters the circulation water tank 300, and the valves are opened when tail gas of the engine test bed does not exist in the circulation water tank 300 and the cooling water inlet of the cooling water works.
Preferably, the circulation tank 300 is provided with a water injection port for injecting municipal tap water.
Preferably, the circulation tank 300 is provided with a drain port to be discharged into the sewage treatment system.
Preferably, a detector for detecting the ph of the alkaline circulating water in the circulating water tank 300, a thermometer for detecting the alkaline circulating water in the circulating water tank 300, and a liquid level meter for displaying the level of the alkaline circulating water in the circulating water tank 300 are arranged in the circulating water tank 300.
Preferably, the circulating water tank 300 is provided with a feed inlet for feeding alkaline materials, so as to ensure that the alkalinity and acidity of the alkaline circulating water in the circulating water tank 300 reaches a predetermined value.
Preferably, the gas containing volume in the circulating water tank 300 is larger than the volume 400 of the variable frequency diffuser, and preferably, the gas containing volume in the circulating water tank 300 is 10 times of the volume 400 of the variable frequency diffuser.
The first alkali liquor spray tower 100 comprises a spray tower body 101, a spray tower air inlet 102, a spray tower air outlet 103, a spray tower alkali liquor inlet 104, a spray tower first packing layer 105, a spray tower first spray system 106, a spray tower second packing layer 107, a spray tower second spray system 108, a spray tower liquid level meter 109, a spray tower circulating pump 110, a spray tower overflow port 111, a spray tower drain outlet 112 and a spray tower maintenance port 113; the spray tower body 101 is of a hollow cylindrical structure, the spray tower air inlet 102, the spray tower alkali liquor inlet 104, the spray tower overflow port 111, the spray tower drain outlet 112 and the spray tower maintenance port 113 are all arranged on the side part of the spray tower body 101, and the spray tower air outlet 103 is arranged on the top of the spray tower body 101; the spray tower inlet 102 is communicated with an exhaust port of the circulating water tank 300 which is positioned above the alkaline circulating water level and used for exhausting tail gas of the engine test bed exhausted by the variable frequency diffuser 400 through a pipeline, the spray tower outlet 103 is communicated with the outside atmosphere, one end of a conveying pipeline for conveying alkaline circulating water to a spraying system is communicated with an alkaline circulating water conveying port, which is positioned below the alkaline circulating water level, of the circulating water tank 300 and is used for conveying alkaline circulating water, the other end of the conveying pipeline penetrates through the spraying tower alkali liquor inlet 104 and is respectively communicated with a spraying tower first spraying system 106 and a spraying tower second spraying system 108, the spraying tower circulating pump 110 is arranged outside the spraying tower body 101, the alkaline circulating water pump in the circulating water tank 300 is conveyed to the first spraying system 106 of the spraying tower and the second spraying system 108 of the spraying tower through a conveying pipeline for conveying the alkaline circulating water to the spraying system; preferably, a valve is arranged at an alkaline circulating water conveying port of the circulating water tank 300, which is located below the alkaline circulating water level and used for conveying alkaline circulating water, and is opened when tail gas of an engine test bed enters the circulating water tank 300 in a treatment manner, and is closed when no tail gas of the engine test bed exists in the circulating water tank 300; further preferably, the conveying pipeline for conveying the alkaline circulating water to the spraying system is provided with a seal through the spraying tower alkali liquor inlet 104; the arrangement position of the spray tower overflow port 111 is higher than the spray tower air inlet 102, the spray tower alkali liquor inlet 104 and the spray tower drain outlet 112, and the spray tower drain outlet 112 is communicated with the wastewater inlet of the wastewater treatment equipment 500 through a pipeline. Along the axis of the spray tower body 101, a first packing layer 105 of the spray tower, a first spraying system 106 of the spray tower, a second packing layer 107 of the spray tower and a second spraying system 108 of the spray tower are fixedly installed inside the spray tower body 101 from bottom to top in sequence, preferably, the packing in the first packing layer 105 of the spray tower and the second packing layer 107 of the spray tower is ceramic packing. The spray tower liquid level meter is arranged on the side part of the spray tower body 101 and is positioned on the lower part of the first packing layer 105 of the spray tower, and is used for monitoring the water level of the waste water at the bottom of the spray tower body 101.
The variable frequency diffuser 400 comprises a variable frequency diffuser cylinder 410 and a variable frequency diffuser guide cone 430, wherein the variable frequency diffuser cylinder 410 is a hollow circular cylinder, a plurality of variable frequency diffuser air outlet holes 420 for discharging gas are formed in the surface of the cylinder, and the variable frequency diffuser air outlet holes 420 are through holes penetrating through the circular cylinder; the variable frequency diffuser guide cone 430 is cone-shaped, the cone surface of the variable frequency diffuser guide cone 430 is arranged in the circular cylinder, the diameter of the excircle at the bottom of the variable frequency diffuser guide cone 430 is the same as the inner diameter of the circular cylinder, the excircle at the bottom of the variable frequency diffuser guide cone 430 is fixedly connected with one end surface of the circular cylinder, one end of the variable frequency diffuser cylinder 410 is closed, tail gas discharged from an engine test bench enters from the end surface of one open end of the variable frequency diffuser cylinder 410, is guided by the variable frequency diffuser guide cone 430 and is discharged from the variable frequency diffuser air outlet holes 420, and the gas entering the variable frequency diffuser cylinder 410 is guided by the variable frequency diffuser guide cone 430, so that the gas entering the variable frequency diffuser cylinder 410 is uniformly discharged from the variable frequency diffuser air outlet holes 420, and is convenient for subsequent tail gas treatment, the tail gas treatment capacity of the equipment is improved.
The method for treating the tail gas of the engine test bed by using the tail gas treatment system of the engine test bed comprises the following steps:
s100), starting a spraying system
S110), keeping a valve arranged at a water inlet, which is arranged above the alkaline circulating water level and used for introducing clean water, of the circulating water tank 300, closing valves at a cooling water inlet, which is arranged above the alkaline circulating water level and used for introducing cooling water, and a water outlet, which is arranged below the alkaline circulating water level and used for leading out alkaline circulating water, of the circulating water tank 300, and opening a valve at an alkaline circulating water delivery port, which is arranged below the alkaline circulating water level and used for delivering alkaline circulating water, of the circulating water tank 300.
S120), starting the spray tower circulating pump 110 to pump out the alkaline circulating water in the circulating water tank 300 and convey the alkaline circulating water to the first spray system 106 and the second spray system 108 of the spray tower through a conveying pipeline for conveying the alkaline circulating water to the spray system, starting the first spray system 106 and the second spray system 108 of the spray tower, starting the alkaline circulating water to spray, and keeping the spray tower circulating pump 110, the first spray system 106 and the second spray system 108 of the spray tower to work.
S200) and tail gas treatment
S210) and an engine test, wherein tail gas of an engine test bed is discharged from an exhaust system (the exhaust system can be an exhaust pipeline, an ejector and the like), enters from the end face of one open end of a variable-frequency diffuser cylinder body 410, is guided by a variable-frequency diffuser guide cone 430, is discharged from a plurality of variable-frequency diffuser air outlet holes 420, and then enters into the first alkali liquor spray tower 100 and the spray tower air inlet 102 of the second alkali liquor spray tower 200 respectively through pipelines which are communicated with an exhaust port of the circulation water tank 300, which is positioned above the alkaline circulation water level and used for discharging the tail gas of the engine test bed discharged from a variable-frequency diffuser 400, and the spray tower air inlet 102.
S220), after the tail gas of the engine test bed entering the gas inlet 102 of the spray tower sequentially passes through the first packing layer 105 of the spray tower and the second packing layer 107 of the spray tower, the tail gas of the engine test bed is discharged from the gas outlet 103 of the spray tower, and when the tail gas of the engine test bed passes through the first packing layer 105 of the spray tower and the second packing layer 107 of the spray tower, alkaline circulating water and the tail gas of the engine test bed are subjected to degradation treatment.
S300), closing the spraying system
After the engine test is finished and the time reaches the preset time, preferably 2-4 hours, and further preferably 3 hours after the test is finished, the spray tower circulating pump 110 is closed, and the valve arranged at the alkaline circulating water conveying opening for conveying alkaline circulating water, which is positioned below the alkaline circulating water level, of the circulating water tank 300 is closed after the first spray system 106 and the spray tower second spray system 108 are closed.
S400), wastewater treatment
S410), keeping a valve which is arranged above the alkaline circulating water level and is used for introducing cooling water, a valve which is arranged below the alkaline circulating water level and is used for leading out alkaline circulating water, and a valve which is arranged at the alkaline circulating water delivery port of the circulating water tank 300 and is used for delivering alkaline circulating water, closing, opening the valve which is arranged at the water inlet of the circulating water tank 300 and is arranged above the alkaline circulating water level and is used for introducing purified water and the drain outlet 112 of the spray tower, starting the wastewater treatment equipment 500, the sewage in the first alkali liquor spray tower 100 and the second alkali liquor spray tower 200 is discharged through a spray tower drain outlet 112 and enters the wastewater treatment equipment 500 for purification treatment, and then enters a water outlet of the wastewater treatment equipment 500 through a pipeline, and then enters the circulating water tank 300 after entering a water inlet for introducing purified water above an alkali circulating water level, and then flows into the circulating water tank 300.
S420), after the spray tower liquid level meter 109 displays that no sewage exists in the first alkali liquor spray tower 100 and the second alkali liquor spray tower 200, the waste water treatment equipment 500 is closed, and then the valve arranged at the water inlet for introducing purified water and the spray tower sewage outlet 112 arranged above the alkaline circulating water level of the circulating water tank 300 are respectively closed.
S500), cooling alkaline circulating water
S510), keeping a valve arranged at a water inlet for introducing clean water above an alkaline circulating water level of the circulating water tank 300 and a valve arranged at an alkaline circulating water delivery port for delivering alkaline circulating water below the alkaline circulating water level of the circulating water tank 300 closed, opening a cooling water inlet for introducing cooling water above the alkaline circulating water level and a valve arranged at a water outlet for leading out alkaline circulating water below the alkaline circulating water level, starting the closed cooling tower 600, allowing alkaline circulating water in the circulating water tank 300 to enter the closed cooling tower 600 through the water outlet for leading out alkaline circulating water below the alkaline circulating water level, cooling the alkaline circulating water, and allowing the alkaline circulating water to enter the circulating water tank 300 through the cooling water inlet for introducing cooling water above the alkaline circulating water level until a thermometer for detecting alkaline circulating water in the circulating water tank 300 displays alkaline circulating water in the circulating water tank 300 The temperature is not higher than a predetermined value, preferably, the predetermined value is 30 ℃.
Preferably, after each engine test, alkaline materials are fed through a feeding port for feeding alkaline materials, which is arranged in the circulating water tank 300, so that the pH value of alkaline circulating water in the circulating water tank 300 reaches a preset value.
Preferably, when the level of the alkaline circulating water in the circulating water tank 300 is lower than a predetermined value, tap water is injected through a water injection port provided in the circulating water tank 300 and used for injecting municipal tap water, and the predetermined value is preferably 2/3 of the depth of the circulating water tank 300.
Preferably, the alkaline circulating water in the circulating water tank 300 is discharged into the sewage treatment system through a discharge port of the circulating water tank 300, which is arranged to discharge into the sewage treatment system, for a predetermined period, and preferably, the predetermined period is 3 months.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The tail gas treatment system of the engine test bed is characterized by comprising a first alkali liquor spray tower, a second alkali liquor spray tower, a circulating water tank, a variable-frequency diffuser, a wastewater treatment device and a closed cooling tower;
one side surface of the circulating water pool is provided with a mounting hole for mounting a variable frequency diffuser, the variable frequency diffuser is horizontally and fixedly mounted in the circulating water pool after penetrating through the mounting hole, alkaline circulating water is filled in the circulating water pool, and the variable frequency diffuser is positioned above the alkaline circulating water;
the first alkali liquor spray tower and the second alkali liquor spray tower are identical in structure and are fixedly arranged on the upper surface of the circulating water tank, and air inlets of the spray towers of the first alkali liquor spray tower and the second alkali liquor spray tower are communicated with an exhaust port, located above an alkaline circulating water level, of the circulating water tank through a pipeline and used for exhausting tail gas of an engine test bed exhausted by the variable-frequency diffuser;
the waste water treatment equipment is fixedly arranged on the upper surface of the circulating water tank, a waste water inlet of the waste water treatment equipment is communicated with the drain outlets of the spray towers of the first alkali liquor spray tower and the second alkali liquor spray tower through pipelines, a water outlet of the waste water treatment equipment is communicated with a water inlet, positioned above the alkaline circulating water level, of the circulating water tank and used for introducing purified water through a pipeline, and a valve is arranged at a water inlet, positioned above the alkaline circulating water level, of the circulating water tank and used for introducing purified water;
closed cooling tower fixed mounting is at circulating water tank's upper surface, and the water inlet of closed cooling tower passes through the pipeline and is used for deriving the delivery port intercommunication of alkaline circulating water with the circulating water pond below being located alkaline circulating water level, the delivery port of closed cooling tower passes through the pipeline and the circulating water pond be located the cooling water inlet intercommunication that is used for introducing the cooling water of alkaline circulating water level top, the cooling water inlet department that is used for introducing the cooling water and the delivery port that is used for deriving alkaline circulating water that is located alkaline circulating water level below of circulating water pond that is located alkaline circulating water level top all are provided with the valve.
2. The engine test stand exhaust treatment system of claim 1, wherein: the first alkali liquor spray tower comprises a spray tower body, a spray tower air inlet, a spray tower air outlet, a spray tower alkali liquor inlet, a spray tower first packing layer, a spray tower first spray system, a spray tower second packing layer, a spray tower second spray system, a spray tower liquid level meter, a spray tower circulating pump, a spray tower overflow port, a spray tower drain outlet and a spray tower maintenance port; the spray tower body is of a hollow cylindrical structure, a spray tower air inlet, a spray tower alkali liquor inlet, a spray tower overflow port, a spray tower drain outlet and a spray tower maintenance port are arranged on the side part of the spray tower body, and a spray tower air outlet is arranged on the top of the spray tower body; the spraying tower circulating pump is arranged outside the tower body of the spraying tower and is used for pumping out the alkaline circulating water in the circulating water tank and conveying the alkaline circulating water to the first spraying system of the spraying tower and the second spraying system of the spraying tower through the conveying pipeline for conveying the alkaline circulating water to the spraying system; a valve is arranged at an alkaline circulating water conveying port of the circulating water tank, which is positioned below the alkaline circulating water level and used for conveying alkaline circulating water, the arrangement position of an overflow port of the spray tower is higher than that of an air inlet of the spray tower, an alkaline liquor inlet of the spray tower and a drain outlet of the spray tower are arranged, and the drain outlet of the spray tower is communicated with a wastewater inlet of wastewater treatment equipment through a pipeline; along the axis of the spray tower body, a first packing layer of the spray tower, a first spraying system of the spray tower, a second packing layer of the spray tower and a second spraying system of the spray tower are sequentially and fixedly installed inside the spray tower body from bottom to top, and a liquid level meter of the spray tower is arranged on the lower portion of the first packing layer of the spray tower on the side portion of the spray tower body and used for monitoring the water level of wastewater at the bottom of the spray tower body.
3. The engine test stand exhaust treatment system of claim 1, wherein: the variable-frequency diffuser comprises a variable-frequency diffuser cylinder and a variable-frequency diffuser diversion cone, the variable-frequency diffuser cylinder is a hollow circular cylinder, a plurality of variable-frequency diffuser air outlet holes used for discharging gas are formed in the surface of the cylinder, and the variable-frequency diffuser air outlet holes are through holes penetrating through the circular cylinder; the frequency conversion diffuser water conservancy diversion awl is the cone type, and the conical surface of frequency conversion diffuser water conservancy diversion awl sets up inside circular cylinder, and the bottom excircle diameter of frequency conversion diffuser water conservancy diversion awl is the same with circular cylinder's internal diameter, and the bottom excircle and a circular cylinder terminal surface fixed connection of frequency conversion diffuser water conservancy diversion awl will frequency conversion diffuser cylinder one end seal.
4. The engine test stand exhaust treatment system of claim 1, wherein: the circulating water tank is provided with a water filling port for filling municipal tap water.
5. The engine test stand exhaust treatment system of claim 1, wherein: the circulating water tank is provided with a drain outlet which is discharged into the sewage treatment system.
6. The engine test stand exhaust treatment system of claim 1, wherein: a detector for detecting the pH value of the alkaline circulating water in the circulating water tank, a thermometer for detecting the alkaline circulating water in the circulating water tank and a liquid level meter for displaying the level of the alkaline circulating water in the circulating water tank are arranged in the circulating water tank.
7. The engine test stand exhaust treatment system of claim 1, wherein: the circulating water tank is provided with a feed inlet for feeding alkaline materials so as to ensure that the pH value of the alkaline circulating water in the circulating water tank reaches a preset value.
8. A method of treating engine test stand exhaust using the engine test stand exhaust treatment system of any of claims 2-7, comprising the steps of:
s100), starting a spraying system
S110), keeping a valve arranged at a water inlet, which is arranged above an alkaline circulating water level and used for introducing clean water, of the circulating water tank, closing valves at a cooling water inlet, which is arranged above the alkaline circulating water level and used for introducing cooling water, and a water outlet, which is arranged below the alkaline circulating water level and used for leading out alkaline circulating water, and opening a valve at an alkaline circulating water delivery port, which is arranged below the alkaline circulating water level and used for delivering alkaline circulating water, of the circulating water tank;
s120), starting a circulating pump of the spray tower to pump out the alkaline circulating water in the circulating water tank and conveying the alkaline circulating water to a first spray system of the spray tower and a second spray system of the spray tower through a conveying pipeline for conveying the alkaline circulating water to the spray system, starting the first spray system and the second spray system of the spray tower, starting the alkaline circulating water to spray, and keeping the circulating pump of the spray tower, the first spray system and the second spray system of the spray tower to work;
s200) and tail gas treatment
S210) engine test, wherein tail gas of an engine test bed is discharged from an exhaust system (the exhaust system can be an exhaust pipeline, an ejector and the like), enters from the end face of one open end of a cylinder body of a variable-frequency diffuser, is guided by a guide cone of the variable-frequency diffuser, is discharged from a plurality of air outlet holes of the variable-frequency diffuser, and then respectively enters a first alkali liquor spray tower and a spray tower air inlet of a second alkali liquor spray tower through an exhaust port and a spray tower air inlet pipeline which are communicated with a circulating water tank and are positioned above an alkaline circulating water level and used for discharging the tail gas of the engine test bed discharged by the variable-frequency diffuser;
s220), after sequentially passing through a first packing layer and a second packing layer of the spray tower, engine test bed tail gas entering a gas inlet of the spray tower is discharged from a gas outlet of the spray tower, and when the engine test bed tail gas passes through the first packing layer and the second packing layer of the spray tower, alkaline circulating water and the engine test bed tail gas are subjected to degradation treatment;
s300), closing the spraying system
After the engine test is finished, when the time reaches a preset time, preferably 2-4 hours, further preferably 3 hours after the test is finished, closing the circulating pump of the spray tower, and closing a valve at an alkaline circulating water delivery port for delivering alkaline circulating water, which is arranged below the alkaline circulating water level, of the circulating water tank after the first spray system and the second spray system of the spray tower;
s400), wastewater treatment
S410), keeping a valve which is positioned above an alkaline circulating water level and used for introducing cooling water, a valve which is positioned below the alkaline circulating water level and used for leading out alkaline circulating water, and a valve which is arranged at an alkaline circulating water delivery port of a circulating water tank and used for delivering alkaline circulating water and is positioned below the alkaline circulating water level and used for delivering alkaline circulating water to be closed, opening the valve which is arranged at the water inlet of the circulating water tank and used for introducing purified water and a spray tower drain outlet, starting the wastewater treatment equipment, discharging the wastewater in the first alkaline liquid spray tower and the second alkaline liquid spray tower through the spray tower drain outlet, entering the wastewater treatment equipment for purification treatment, entering a water outlet of the wastewater treatment equipment through a pipeline, entering a water inlet of the circulating water tank and used for introducing purified water and positioned above the alkaline circulating water level, and then flowing into the circulating;
s420), after the spraying tower liquid level meter displays that no sewage exists in the first alkali liquor spraying tower and the second alkali liquor spraying tower, closing the wastewater treatment equipment, and respectively closing a valve arranged at a water inlet for introducing clean water and a spraying tower sewage outlet which are arranged above an alkaline circulating water level of the circulating water tank;
s500), cooling alkaline circulating water
S510), keeping a valve arranged at a water inlet for introducing clean water above the alkaline circulating water level of the circulating water tank and a valve arranged at an alkaline circulating water delivery port for delivering alkaline circulating water below the alkaline circulating water level of the circulating water tank closed, opening valves at a cooling water inlet positioned above the alkaline circulating water level and used for introducing cooling water and a water outlet positioned below the alkaline circulating water level and used for leading out alkaline circulating water, starting the closed cooling tower, and the temperature of the alkaline circulating water in the circulating water tank is not higher than a preset value as shown by a thermometer which is positioned above the alkaline circulating water level and used for detecting the alkaline circulating water in the circulating water tank.
9. The method of claim 8, wherein: after the engine test, alkaline materials are put in through a feeding port which is arranged in the circulating water tank and used for putting in the alkaline materials, so that the pH value of the alkaline circulating water in the circulating water tank reaches a preset value.
10. The method of claim 8, wherein: when the water level of the alkaline circulating water in the circulating water tank is lower than a preset value, tap water is injected through a water injection port which is arranged in the circulating water tank and is used for injecting municipal tap water.
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