CN214145645U - Exhaust device of tail gas treatment device of engine test bed - Google Patents

Abstract

The tail gas treatment device of the engine test bed is characterized in that two ends of a tail gas treatment system are respectively communicated with an exhaust pipeline of a first engine test bed and an inlet of an exhaust main pipeline; two ends of the horizontal oil-gas separation device are respectively communicated with an exhaust pipeline of a second engine test bed and an inlet of an exhaust main pipeline; the outlet of the exhaust main pipeline is communicated with a silencing device. The utility model discloses a test run table exhaust apparatus is applicable to the operating mode that is used for the exhaust pipe of a plurality of stations of a plurality of engine test run tables or an engine test run table to share same amortization tower, avoids a plurality of frequency conversion diffusers' venthole combustion air current mutual interference, avoids secondary noise pollution, has reduced the amortization degree of difficulty, and simultaneously, through setting up tail gas processing system, has realized the processing of engine test table tail gas, makes and accords with national pollutant emission standard by the exhaust apparatus combustion gas.

Description

Exhaust device of tail gas treatment device of engine test bed

Technical Field

The utility model relates to an engine test technical field, concretely relates to engine test bed tail gas processing apparatus.

Background

The noise sources polluting various workplaces and surrounding environments of the engine test bed mainly come from aerodynamic noise, and the noise sources only exist in the test bed during test, and generate noise of more than 130dB (A) when high-pressure, high-speed and high-temperature compressed air and fuel gas flow in a metal or other enclosing structures or are exhausted to the atmosphere. Noise is unnecessary sound, the frequency of sound that can be heard by human ears is within 20HZ to 20000HZ, which is directly perceived by human beings, and noise outside this frequency is not perceived by human ears as a silent killer, and is also the object of noise control. At present, each country regulates noise to be controlled within different sound pressure levels according to different environments. According to the relevant regulations of the domestic environmental protection law, the noise sound pressure level of a newly built enterprise working for 8 hours every day is allowed to be 85dB (A), and the noise sound pressure level of the newly built enterprise working for 1 hour every day is allowed to be 94dB (A). For the engine test bed with acoustic power larger than 130dB (A), short action time and working places far away from towns and residential areas, the noise control aims to ensure that the noise of the working places of the test bed reaches the specified index and reduce the noise of the environment outside the test bed as far as possible.

For the method of silencing and reducing noise of the noise generated by the test bed, the prior art has not been provided with a mature and effective technical means, the applicant previously applied CN203910262U and proposed a silencer, which has a certain effect on silencing and reducing noise of the test bed, but the way of staggered arrangement of the thick components and the thin components of the silencer needs a larger floor area, on one hand, when the exhaust flow of the engine test bed is smaller, in order to ensure the silencing quality, a plurality of thick components and thin components (each layer of silencing component needs at least 2 thick components of the silencer and 2 thin components of the silencer and the other half thick components and half thin components of the silencer) still need to be established, resulting in a great increase in cost; on the other hand, when the floor area of the engine test bed, which allows the installation of the muffler device, is small and does not allow the thick sheet assembly and the thin sheet assembly of the muffler as described in this patent application to be provided for each layer in a staggered arrangement, the elimination of any one of the muffling sheets results in a reduction in the muffling ability.

When a flame tube oil mist field test and a nozzle thermal protection test are carried out, exhaust gas contains a large amount of kerosene vapor and vapor droplets, and the kerosene vapor and the vapor droplets are discharged into the atmosphere after oil-gas separation treatment. The fuel concentration in the exhaust gas meets the secondary emission standard of the Integrated emission Standard for air pollutants (GB 16297 and 1996), namely the maximum allowable emission concentration of non-methane hydrocarbon is 120mg/m3, and the maximum allowable emission rate is 53kg/h (the exhaust height is 30 m).

As early as the thirty years of the last century, demisters were invented for the needs of industrial production. The demister can be divided into a plurality of types according to the application or structure of the demister, such as a louver type separator, a gravity settling type separator and a cyclone plate separator, but the separators have low separation efficiency and are not easy to separate mist with smaller particle size; although the wire mesh demister can separate common mist, the mist is required to be clean, the airflow velocity is small, the resistance is reduced greatly, the service cycle is short, and the equipment investment is large. Therefore, the problems which need to be solved urgently in a flame tube oil mist field test and a nozzle heat protection test of a novel efficient demister with high research and production separation efficiency, small resistance reduction, large allowable air flow speed and strong anti-blocking function are solved.

In addition, an engine test is one of necessary links for putting and using aerospace engines such as a turbofan engine and a solid-jet engine, an 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 exhaust gas exhausted by the test bed is directly exhausted into the atmosphere, the atmosphere is greatly polluted, acid rain is generated, meanwhile, pollutants such as PM10 and PM2.5 can be formed in the exhausted particulate matters to pollute the atmosphere, the engine test bed is not 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 and the solid-jet engine does not exist.

Disclosure of Invention

The technical solution problem of the utility model is that: the defects of the prior art are overcome, and the tail gas treatment device of the engine test bed is provided.

The technical solution of the utility model is that:

an engine test bed tail gas treatment device comprises a first engine test bed exhaust pipeline, a second engine test bed exhaust pipeline, an exhaust main pipeline, a silencing device, a horizontal oil-gas separation device and a tail gas treatment system; the exhaust pipeline of the first engine test bed is communicated with the inlet of the tail gas treatment system, and two ends of the horizontal oil-gas separation device are respectively communicated with the exhaust pipeline of the second engine test bed and the inlet of the tail gas treatment system; the outlet of the tail gas treatment system is communicated with a silencing device; the horizontal oil-gas separation device comprises a demister and an active carbon adsorption device; the gas outlet of the demister is communicated with the gas inlet of the active carbon adsorption device; along the flowing direction of the oil-gas mixed gas, the demister comprises a horizontally arranged shell consisting of an expansion section, an equal straight section and a convergence section which are connected in sequence; one end of the expansion section is provided with an air inlet which is communicated with an outlet of an exhaust pipeline of the second engine test bed; the equal straight section is sequentially provided with a baffle plate demister and a wire mesh demister along the flowing direction of the oil-gas mixed gas; the side wall of the expansion section is provided with a first spraying and washing device, and the side wall of the equal straight section is provided with a second spraying and washing device between the baffle plate demister and the wire mesh demister; the bottoms of the baffle plate demister and the wire mesh demister are respectively provided with a first liquid discharge port and a second liquid discharge port; the activated carbon adsorption device comprises an activated carbon box body which is horizontally arranged; along the flowing direction of gas discharged from a gas outlet of the demister, a vertical activated carbon adsorption tank and a horizontal activated carbon adsorption tank are sequentially arranged in an activated carbon box body, the activated carbon box body is provided with a gas outlet, and the gas outlet of the activated carbon box body is communicated with an inlet of a main exhaust pipeline through a pipeline; meanwhile, a third liquid outlet is formed in the bottom of the activated carbon box.

Furthermore, the silencing device comprises a tower body, a variable-frequency diffuser and a silencing piece assembly; the top end of the tower body is provided with a top cover, and one side surface of the tower body is provided with a mounting hole of a variable-frequency diffuser; the variable-frequency diffuser penetrates through the variable-frequency diffuser mounting hole and is horizontally and fixedly mounted in the tower body; the silencing sheet assembly is fixedly arranged in the tower body, and the outlet of the exhaust main pipeline is communicated with the variable-frequency diffuser.

Furthermore, the spraying and flushing device comprises a first spraying and flushing device, a second spraying and flushing device, a third spraying and flushing device and a fourth spraying and flushing device.

Further, the baffling board demister includes baffling board piece and barb, and the barb sets up the department of buckling at the baffling board piece.

Further, the baffled demister comprises a plurality of baffling plates.

Further, 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 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 flow guide cone is cone-shaped, the conical surface of the frequency conversion diffuser flow guide cone is arranged inside the circular cylinder, and the excircle of the bottom of the frequency conversion diffuser flow guide cone is fixedly connected with one end face of the circular cylinder.

Further, the silencing sheet assembly comprises a lower silencing sheet assembly, a middle silencing sheet assembly and an upper silencing sheet assembly which are sequentially arranged from bottom to top.

Furthermore, each layer of silencing sheet component comprises semi-thin silencing sheets, semi-thick silencing sheets and thin and thick combined silencing sheets which are arranged at intervals.

Furthermore, in each layer of silencing sheet component, the semi-thin silencing sheet and the semi-thick silencing sheet are arranged at two ends and fixedly connected with the front end face and the rear end face of the tower body, and a plurality of thin and thick combined silencing sheets are arranged between the semi-thin silencing sheet and the semi-thick silencing sheet at intervals.

Furthermore, on the same end side, the types of the silencing sheets of the adjacent 2 layers are different, and the airflow channels formed by the adjacent silencing sheet assemblies are arranged in a staggered mode.

Compared with the prior art, the utility model the advantage lie in:

1. in the tail gas treatment device of the engine test bed, the oil-gas separation silencing device occupies small area, is easy to install, simple to operate and good in defoaming effect, and can realize 99% removal of oil drops; meanwhile, the device can adapt to any gas with liquid, effectively reduce the blocking condition of the demister and ensure the long-time use of the demister.

2. The utility model discloses an among the engine test bed tail gas processing apparatus, oil-gas separation silencing device adopts the baffling board demister to carry out 100% effective separation to 20um-50 um's oil drop and liquid drop, adopts the silk screen demister to carry out 99% effective separation to 5um-20 um's oil drop and liquid drop, in addition, can be according to the oil-gas separation demand of difference, through the inter-plate distance of the baffling board of adjustment baffling board demister to and the thickness of silk screen demister, realize oil-gas separation's purpose.

3. The utility model discloses an among the engine test bench tail gas processing apparatus, oil-gas separation silencing device adopts and sprays washing unit to wash the baffling board demister, and the scale deposit attached to on the baffling board demister washes and gets rid of after will long-term operation.

4. The utility model discloses an among the engine test bed tail gas processing apparatus, oil-gas separation silencing device sets up the active adsorption carbon device, adsorbs to the oil drop below 5 mu m, adsorbs can so that organic waste gas purification efficiency reaches 90-95%, and then guarantees to pass through the utility model discloses a gas after horizontal oil-gas separation device handles accords with national emission standard, in addition, can use hot air desorption regeneration to make the active carbon drop into use again or change after the active carbon adsorption saturation.

5. In the tail gas treatment device of the engine test bed of the utility model, the silencing device creatively provides a thin and thick combined silencing plate flat plate, realizes that a thin silencing plate and a thick silencing plate are respectively arranged at the 2 side of an airflow channel, reduces the using quantity of the silencing plates (the thick plate component of 2 silencers and the thin plate component of 2 silencers are added with the thick plate component of half silencers and the thin plate component of half silencers aiming at each layer of silencing plate component in the prior art, the silencing plate component of the utility model is equivalent to the thick plate component of only 1 silencer and the thin plate component of 1 silencer and the thick plate component of half silencers and the thin plate component of half silencers, the occupied area is small (the silencing plate is also suitable for a small-flow engine test bed when being suitable for a large-flow test bed), the application range is wide, meanwhile, the cost is greatly reduced.

6. The utility model discloses an among the engine test bed tail gas processing apparatus, silencing device is through the frequency conversion diffuser water conservancy diversion awl that sets up the cone type, will get into the gaseous water conservancy diversion of frequency conversion diffuser barrel for the even discharge from a plurality of frequency conversion diffuser ventholes of the gaseous follow-up amortization of being convenient for of getting into the frequency conversion diffuser barrel has improved the efficiency of amortization.

7. The utility model discloses an among the engine test bed tail gas processing apparatus, silencing device it sets up the frequency conversion diffuser venthole of through-hole form through setting up frequency conversion diffuser on the frequency conversion diffuser surface, and the air current makes the noise frequency to the high frequency skew through doing frequency conversion diffuser venthole, utilizes the high frequency to come the degree of difficulty of the noise control that the noise control principle reduces than the low frequency easily.

8. The utility model discloses an among the engine test bed tail gas processing apparatus, silencing device it sets up the water conservancy diversion piece on the amortization piece, to the gaseous water conservancy diversion that gets into airflow channel for gas flow is even, has further improved the amortization efficiency.

9. The utility model discloses an among the engine test bed tail gas processing apparatus, through setting up tail gas processing system, realized the processing of engine test bed tail gas, make and accord with national pollutant emission standard by the exhaust apparatus combustion gas.

Drawings

Fig. 1 is the schematic diagram of the tail gas treatment device of the engine test bed of the utility model.

Fig. 2 is the utility model discloses an among the engine test bed tail gas processing apparatus, horizontal oil-gas separation device's schematic structure.

Fig. 3 is a schematic diagram of the horizontal type oil-gas separator with two barbs S2 type baffle demister in the tail gas treatment device of the engine test bed of the present invention.

Fig. 4 is a schematic diagram of the horizontal type oil-gas separator with three barbs S3 type baffle demister in the tail gas treatment device of the engine test bed of the present invention.

Fig. 5 is a schematic diagram of the horizontal type oil-gas separator with four barbs S4 type baffle demister in the tail gas treatment device of the engine test bed of the present invention.

Fig. 6 is a schematic view of the working principle of the horizontal type oil-gas separator active carbon adsorption device in the tail gas treatment device of the engine test bed of the present invention.

Fig. 7 is a schematic structural diagram of a silencer in the tail gas treatment device of the engine test bed of the present invention.

Fig. 8 is a schematic structural diagram of the internal structure of the silencer in the tail gas treatment device of the engine test bed of the present invention.

Fig. 9 is a schematic structural diagram of a 3-layer noise reduction sheet assembly in the tail gas treatment device of the engine test bed of the present invention.

Fig. 10 is a schematic structural view of a 1-layer noise reduction sheet assembly in the tail gas treatment device of the engine test bed of the present invention.

Fig. 11 is the utility model discloses an among the engine test bed tail gas processing apparatus, on an angle direction, the structural sketch map of frequency conversion diffuser.

Fig. 12 is a schematic structural diagram of a variable frequency diffuser in another angular direction in the tail gas treatment device of the engine test bed of the present invention.

Fig. 13 is the utility model discloses an among the engine test bed tail gas processing apparatus, the structural schematic diagram of frequency conversion diffuser water conservancy diversion awl in the frequency conversion diffuser.

Fig. 14 is a schematic structural view of a half-thin noise-reduction sheet in the tail gas treatment device of the engine test bed of the present invention.

Fig. 15 is a schematic structural view of a half-thick noise damping sheet in the tail gas treatment device of the engine test bed of the present invention.

Fig. 16 is a schematic structural diagram of a thin and thick combined noise damping sheet in the tail gas treatment device 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 "center", "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, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present 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 "connected" are to be construed broadly, and may be, for example, 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-16, an engine test bed tail gas treatment device comprises a first engine test bed exhaust pipeline 10, a second engine test bed exhaust pipeline 20, an exhaust main pipeline 30, a silencer 100, a horizontal oil-gas separation device 200 and a tail gas treatment system 300; the first engine test bed exhaust pipeline 10 is communicated with an inlet of the tail gas treatment system 300, and two ends of the horizontal oil-gas separation device 200 are respectively communicated with inlets of the second engine test bed exhaust pipeline 20 and the tail gas treatment system 300; the outlet of the tail gas treatment system 300 is communicated with the silencing device. The exhaust gas treatment system 300 is a conventional art, for example, chinese patent document zl201922041608.x, and a part of an engine test stand exhaust gas treatment system other than a silencer tower.

The horizontal oil-gas separation device 200 comprises a demister 210 and an active carbon adsorption device 220; the gas outlet of the demister 210 is communicated with the gas inlet of the activated carbon adsorption device 220; along the flowing direction of the oil-gas mixture gas, the demister 210 comprises a horizontally arranged shell consisting of an expansion section 214, an equal straight section 215 and a convergence section 216 which are connected in sequence;

one end of the expansion section 214 is provided with an air inlet 213, and the air inlet 213 is communicated with an outlet of the exhaust pipeline 20 of the second engine test bed; the equal straight section 215 is sequentially provided with a baffle plate demister 211 and a wire mesh demister 212 along the flowing direction of the oil-gas mixed gas; the demister 210 innovatively adopts a baffle demister 211 and a wire mesh demister 212 combined high-efficiency mold discharging device, wherein the baffle plate demister effectively separates oil drops and liquid drops of 20-50 um by 100%; the wire mesh demister can effectively separate 99% of liquid drops below 20um and above 5 um; aiming at the characteristics that the flow channel of the baffle plate demister is large and is not easy to block, gas firstly enters the baffle plate demister to preferentially remove oil drops and liquid drops of 20-50 um, and the subsequent screen mesh demister is protected from being blocked due to large oil quantity.

Preferably, the baffle demister 211 comprises a baffle plate 2111 and a barb 2112, wherein the barb 2112 is arranged at the bent part of the baffle plate 2111; the baffle demister 211 comprises a plurality of baffle plates 2111 arranged in parallel, and a barb 2112 is arranged at the bent part of each baffle plate 2111.

The utility model provides a baffling board demister 211 separates according to the principle of physical inertia, and when the air current of smuggleing secretly liquid drop or solid particle passes through the baffling slab that special design takes shape with 3-9 m/s' speed, at the turn of baffling slab, liquid foam or solid particle are under the inertial force effect, and the direction of motion changes with the direction of motion of gas for liquid foam or solid particle and gas produce the separation. The separation process can be divided into the following three steps:

1. the gas is divided into a plurality of individual flow channels.

2. The inertial force impacts the droplets on the baffle plate.

3. The drip membrane moves forward to the barb and is detached.

The structure is characterized in that the baffle plate demister has different forms according to different purposes, wherein the S shape is an impact type high-efficiency demister mainly applied to airflow flowing in the horizontal direction, higher surface speed is allowed under the conditions of low resistance reduction and high-efficiency separation, and the principle schematic diagrams of the S2 type baffle plate demister with two barbs, the S3 type baffle plate demister with three barbs and the S4 type baffle plate demister with four barbs are shown in the attached drawing according to the size of the limit droplet diameter of mist, the mist load and dust in the airflow.

The baffle demister 211 can effectively remove liquid drops with different sizes by changing baffle plate forms, such as baffle angles of 60 degrees, 90 degrees or 120 degrees, and grooved plates, and can achieve the best defoaming effect of liquid drops with the size of 30 mu m by adjusting the distance between the baffles.

The wire mesh demister 212 achieves the best defoaming effect of 5 μm droplets by changing the type of wire mesh and the thickness of the wire mesh demister, for example, the types of wire mesh are SP type, HP type, DP type and HR type.

A first spray flushing device 217 is arranged on the side wall of the expansion section 214, and a second spray flushing device 218 is arranged on the side wall of the equal straight section 215 between the baffle demister 211 and the wire mesh demister 212; preferably, the first spray rinsing device 217 and the second spray rinsing device 218 are provided with two sets of spray heads. All be provided with two sets of shower nozzles, wash baffling board demister 211 and silk screen demister 212 respectively through the shower nozzle, will be attached to the scale deposit on baffling board demister 211 and silk screen demister 212 after long-term operation and wash and get rid of.

The bottoms of the baffle demister 211 and the wire mesh demister 212 are respectively provided with a first liquid outlet 2171 and a second liquid outlet 2181. A first drain port 2171 and a second drain port 2181 are provided at the bottom of the baffle demister 211 and the wire mesh demister 212, respectively, and communicate with the first drain port 8 and the second drain port 9 via a drain pipe 11 to discharge the discharged liquid collectively.

The activated carbon adsorption device 220 comprises a horizontally arranged activated carbon box body 221, a vertical activated carbon adsorption box 222 and a horizontal activated carbon adsorption box 223 are sequentially arranged in the activated carbon box body 221 along the flowing direction of gas discharged from a gas outlet of the demister 210, the activated carbon box body 221 is provided with a gas outlet 225, and the gas outlet 225 of the activated carbon box body 221 is communicated with an inlet of the main exhaust pipeline 30 through a pipeline; meanwhile, a third liquid outlet 224 is arranged at the bottom of the activated carbon box body 221. Preferably, the bottom of the activated carbon box 221 is provided with a support leg 226.

Set up the active carbon adsorption device, adsorb to the oil drop below 5 mu m, adsorb and can make organic waste gas purification efficiency reach 90-95%, and then guarantee to pass through the utility model discloses a gas after horizontal oil-gas separation device handles accords with national emission standard, in addition, can use hot air desorption regeneration to make the active carbon come into use again or change after the active carbon adsorption saturation.

The silencer 100 comprises a tower body 110, a variable-frequency diffuser 120 and a silencer assembly 130; a top cover 111 is arranged at the top end of the tower body 110, and a variable frequency diffuser mounting hole 112 for mounting the variable frequency diffuser 120 is formed in one side surface of the tower body 110; the variable frequency diffuser 120 passes through the variable frequency diffuser mounting hole 112 and is horizontally and fixedly mounted in the tower body 110; the outlet of the main exhaust pipeline 30 is communicated with the variable-frequency diffuser 120, and the noise reduction plate assembly 130 is fixedly installed in the tower body 110, preferably, the tower body is of a reinforced concrete structure.

The variable frequency diffuser 120 comprises a variable frequency diffuser cylinder 121 and a variable frequency diffuser guide cone 123, wherein the variable frequency diffuser cylinder 121 is a hollow circular cylinder, a plurality of variable frequency diffuser air outlet holes 122 for discharging gas are formed in the surface of the cylinder, and the variable frequency diffuser air outlet holes 122 are through holes penetrating through the circular cylinder; the variable frequency diffuser diversion cone 123 is cone-shaped, the cone surface of the variable frequency diffuser diversion cone 123 is arranged in the circular cylinder, the diameter of the excircle at the bottom of the variable frequency diffuser diversion cone 123 is the same as the inner diameter of the circular cylinder, the excircle at the bottom of the variable frequency diffuser diversion cone 123 is fixedly connected with one end surface of the circular cylinder, one end of the variable frequency diffuser cylinder 121 is closed, gas discharged from an engine test bed enters from the end surface of one open end of the variable frequency diffuser cylinder 121, is guided by the variable frequency diffuser diversion cone 123 and is discharged from a plurality of variable frequency diffuser gas outlet holes 122, and the gas entering the variable frequency diffuser cylinder 121 is guided by the variable frequency diffuser diversion cone 123, so that the gas entering the variable frequency diffuser cylinder 121 is uniformly discharged from the plurality of variable frequency diffuser gas outlet holes 122, and is convenient for subsequent silencing, the effectiveness of the sound attenuation is improved.

The silencing sheet assembly 130 comprises a lower silencing sheet assembly 1301, a middle silencing sheet assembly 1302 and an upper silencing sheet assembly 1303 which are arranged from bottom to top in sequence; each layer of silencer component comprises semi-thin silencers 131, semi-thick silencers 132 and thin and thick combined silencers 133 which are arranged at intervals, in each layer of silencer component, the semi-thin silencers 131 and the semi-thick silencers 132 are arranged at two ends and are fixedly connected with the front end face and the rear end face of the tower body 110, a plurality of thin and thick combined silencers 133 are arranged at intervals between the semi-thin silencers 131 and the semi-thick silencers 132, and the adjacently arranged silencers form an airflow channel; the method of mounting each layer of sound attenuation panel assembly and the method of attachment to the tower are known in the art, in a manner substantially in accordance with the applicant's prior application (CN 201420057351.1).

On the same end side, the types of the silencing sheets of the adjacent 2 layers are different, so that the airflow passages formed by the adjacent silencing sheet assemblies are staggered, and the silencing capability of the silencing device is further improved, in a preferred embodiment of the application, in the lower silencing sheet assembly 1301 along the front and back directions of the silencing tower, the arrangement mode of the silencing sheets is half-thin silencing sheets 131, thin and thick combined silencing sheets 133 and half-thick silencing sheets 132, wherein the thick silencing sheet parts in the thin and thick combined silencing sheets 133 face the half-thin silencing sheets 131; in the middle-layer silencing piece assembly 1302, the arrangement modes of the silencing pieces are a half-thick silencing piece 132, a thin-thick combined silencing piece 133 and a half-thin silencing piece 131, wherein the thick silencing pieces in the thin-thick combined silencing piece 133 face the half-thin silencing piece 131; in the upper-layer silencing piece assembly 1303, the silencing pieces are arranged in a manner of a half-thin silencing piece 131, a thin-thick combined silencing piece 133 and a half-thick silencing piece 132, wherein the thick silencing piece parts in the thin-thick combined silencing piece 133 face the half-thin silencing piece 131.

The semi-thin silencing sheet 131 comprises a semi-thin silencing sheet flat sheet 1311 and 2 semi-thin silencing sheet flow guiding conical sheets 1312, the 2 semi-thin silencing sheet flow guiding conical sheets 1312 are fixedly connected with both ends of the semi-thin silencing sheet flat sheet 1311, and preferably, the 2 semi-thin silencing sheet flow guiding conical sheets 1312 and the semi-thin silencing sheet flat sheet 1311 are integrally formed; the surfaces of the semi-thin silencing plate flat sheet 1311 and the semi-thin silencing plate flow guiding conical sheet 1312 are both provided with a plurality of silencing plate micropores 134, the plurality of silencing plate micropores 134 are through holes penetrating through the surfaces of the semi-thin silencing plate flat sheet 1311 and the semi-thin silencing plate flow guiding conical sheet 1312, the structure of the semi-thin silencing plate 131 is the prior art, the semi-thin silencing plate is the semi-sheet structure of a sheet assembly in the prior application (application number: CN201420056663.0, invention name: sheet assembly for silencer) of the applicant, and the gas flow guiding of the gas entering a gas flow channel is realized by arranging the semi-thin silencing plate flow guiding conical sheet 1312, so that the gas flows uniformly, and the silencing effect is further improved.

The half-thick silencing piece 132 comprises a half-thick silencing piece flat piece 1321 and 2 half-thick silencing piece flow guiding conical pieces 1322, the 2 half-thick silencing piece flow guiding conical pieces 1322 are fixedly connected with two ends of the half-thick silencing piece flat piece 1321, and preferably, the 2 half-thick silencing piece flow guiding conical pieces 1322 and the half-thick silencing piece flat piece 1321 are integrally formed; the surfaces of the half-thick silencing plate flat sheet 1321 and the half-thick silencing plate flow guiding conical sheet 1322 are both provided with a plurality of silencing plate micropores 134, and the plurality of silencing plate micropores 134 are through holes penetrating through the surfaces of the half-thick silencing plate 1321 and the half-thick silencing plate flow guiding conical sheet 1322; wherein, the structure of the half-thickness silencing sheet 132 is the prior art, which is the half-sheet structure of the thin sheet component in the prior application (application number: CN201420056662.6, title: thick sheet component for silencer) of the applicant; the flow guide of the gas entering the gas flow channel is realized by arranging the flow guide conical sheet 1322 of the semi-thick silencing sheet, so that the gas flows uniformly, and the silencing effect is further improved.

The thin and thick combined noise damping sheet 133 is a combined sheet formed by fixedly connecting and combining the horizontal surfaces of the semi-thin noise damping sheet 131 and the semi-thick noise damping sheet 132, in the combined thin and thick combined noise damping sheet 133, the semi-thin noise damping sheet flat sheet 1311 and the semi-thick noise damping sheet flat sheet 1321 are arranged in parallel to form a thin and thick combined noise damping sheet flat sheet 1331 of the thin and thick combined noise damping sheet 133, and the 2 semi-thin noise damping sheet flow guiding conical sheets 1312 and the 2 semi-thick noise damping sheet flow guiding conical sheets 1322 form 2 thin and thick combined noise damping sheet flow guiding conical sheets 1332 of the thin and thick combined noise damping sheet 133; the air flow guiding of the air entering the air flow channel is realized by arranging the thin and thick combined silencing piece flow guiding conical piece 1332, so that the air flows uniformly, and the silencing effect is further improved.

The thickness of the semi-thin silencing sheet 131 is L1, the thickness of the semi-thick silencing sheet 132 is L2, and the thickness of the thin and thick combined silencing sheet 133 is L3, wherein L1 is more than L2 and less than L3, and L3 is L1+ L2.

Preferably, the diameter of the silencing sheet micropores 134 is 0.6mm-1mm, and more preferably, the diameter of the silencing sheet micropores 134 is 0.8 mm.

Preferably, the diameter of the outlet hole 122 of the frequency diffuser is 40mm-80mm, and further preferably, the diameter of the outlet hole 122 of the frequency diffuser is 60mm,

preferably, the horizontal cross section in the tower body 110 is a square channel, and the wall thickness of the tower body 110 is 0.5m, and further preferably, the horizontal cross section in the tower body 110 is a square channel.

Preferably, the thickness L1 of the semi-thin noise-damping sheet 131 is 80mm to 85mm, and more preferably, the thickness L1 of the semi-thin noise-damping sheet 131 is 82 mm.

Preferably, the thickness L2 of the half-thickness noise-reduction sheet 132 is 195mm to 205mm, and more preferably, the thickness L2 of the half-thickness noise-reduction sheet 132 is 200 mm.

The utility model discloses an oil-gas separation silencing device's working process as follows:

engine exhaust containing carbon dioxide, hydrogen sulfide and particulate matters enters the tail gas treatment system for treatment through a first engine test bed exhaust pipeline, and enters a silencing device for silencing through an exhaust main pipeline 30 after the carbon dioxide, the hydrogen sulfide and the particulate matters are removed; oily gas enters a shell of the demister 210 through an air inlet 213, airflow enters a baffle plate demister 211 at the flow rate of 3-6 m/s, the baffle plate demister 211 divides the airflow into a plurality of single-stranded flow channels through a baffle plate 2111, oil drops collide on the baffle plate 2111 through inertia effect after the direction of the airflow is changed, an oil drop film moves forwards to a barb and is separated, 20-50 um oil drops carried in the airflow are removed, and then the oil drops enter a wire mesh demister 212 to separate the 5-20 um oil drops and the liquid drops; however, the combined demister of the baffle demister 211 and the wire mesh demister 212 in the demister 210 does not effectively remove oil droplets below 5um, and therefore, the gas outlet of the demister 210 is connected to the activated carbon adsorption device 220 through the pipeline 230, and the gas discharged from the gas outlet of the demister 210 adsorbs organic waste gas through fine pores of activated carbon, so that the gas emission reaches the emission standard; gas discharged from an exhaust pipeline of a first engine test bed and gas discharged from a horizontal oil-gas separation device are converged into the tail gas treatment system for treatment, carbon dioxide, hydrogen sulfide and particulate matters are removed, then the gas enters from the end face of one open end of the cylinder 121 of the variable-frequency diffuser through a pipeline, is guided by a guide cone 123 of the variable-frequency diffuser and is discharged from a plurality of air outlet holes 122 of the variable-frequency diffuser, the noise frequency of the gas flow is shifted to high frequency through the air outlet holes 122 of the dry variable-frequency diffuser, and the difficulty of noise control is reduced by utilizing the principle that the high frequency ratio and the low frequency are easy to eliminate noise; the gas discharged from the outlet holes 122 of the variable frequency diffuser is discharged from the outlet at the top of the tower body 110 after being silenced and denoised by the staggered gas flow channels formed by 3 layers of silencer component assemblies.

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 present 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 present 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 device for the engine test bed is characterized by comprising a first engine test bed exhaust pipeline, a second engine test bed exhaust pipeline, an exhaust main pipeline, a silencing device, a horizontal oil-gas separation device and a tail gas treatment system;

the exhaust pipeline of the first engine test bed is communicated with the inlet of the tail gas treatment system, and two ends of the horizontal oil-gas separation device are respectively communicated with the exhaust pipeline of the second engine test bed and the inlet of the tail gas treatment system; the outlet of the tail gas treatment system is communicated with a silencing device;

the horizontal oil-gas separation device comprises a demister and an active carbon adsorption device; the gas outlet of the demister is communicated with the gas inlet of the active carbon adsorption device; along the flowing direction of the oil-gas mixed gas, the demister comprises a horizontally arranged shell consisting of an expansion section, an equal straight section and a convergence section which are connected in sequence; one end of the expansion section is provided with an air inlet which is communicated with an outlet of an exhaust pipeline of the second engine test bed; the equal straight section is sequentially provided with a baffle plate demister and a wire mesh demister along the flowing direction of the oil-gas mixed gas; the side wall of the expansion section is provided with a first spraying and washing device, and the side wall of the equal straight section is provided with a second spraying and washing device between the baffle plate demister and the wire mesh demister; the bottoms of the baffle plate demister and the wire mesh demister are respectively provided with a first liquid discharge port and a second liquid discharge port;

the activated carbon adsorption device comprises an activated carbon box body which is horizontally arranged; along the flowing direction of gas discharged from a gas outlet of the demister, a vertical activated carbon adsorption tank and a horizontal activated carbon adsorption tank are sequentially arranged in an activated carbon box body, the activated carbon box body is provided with a gas outlet, and the gas outlet of the activated carbon box body is communicated with an inlet of a main exhaust pipeline through a pipeline; meanwhile, a third liquid outlet is formed in the bottom of the activated carbon box.

2. The apparatus of claim 1, wherein the silencer assembly comprises a tower, a variable frequency diffuser, and a silencer blade assembly; the top end of the tower body is provided with a top cover, and one side surface of the tower body is provided with a mounting hole of a variable-frequency diffuser; the variable-frequency diffuser penetrates through the variable-frequency diffuser mounting hole and is horizontally and fixedly mounted in the tower body; the silencing sheet assembly is fixedly arranged in the tower body, and the outlet of the exhaust main pipeline is communicated with the variable-frequency diffuser.

3. The apparatus of claim 1, wherein the spray rinsing device comprises a first spray rinsing device, a second spray rinsing device, a third spray rinsing device, and a fourth spray rinsing device.

4. The apparatus of claim 1, wherein the baffle demister comprises a baffle plate and a barb, the barb being disposed at a bend of the baffle plate.

5. The apparatus of claim 4 wherein the baffled demister comprises a plurality of baffle plates.

6. The apparatus of claim 2, 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 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 flow guide cone is cone-shaped, the conical surface of the frequency conversion diffuser flow guide cone is arranged inside the circular cylinder, and the excircle of the bottom of the frequency conversion diffuser flow guide cone is fixedly connected with one end face of the circular cylinder.

7. The apparatus of claim 2, wherein: the silencing sheet component comprises a lower silencing sheet component, a middle silencing sheet component and an upper silencing sheet component which are sequentially arranged from bottom to top.

8. The apparatus of claim 7, wherein: each layer of silencing sheet component comprises semi-thin silencing sheets, semi-thick silencing sheets and thin and thick combined silencing sheets which are arranged at intervals.

9. The apparatus of claim 8, wherein: in each layer of silencing sheet component, a half-thin silencing sheet and a half-thick silencing sheet are arranged at two ends and fixedly connected with the front end face and the rear end face of the tower body, and a plurality of thin and thick combined silencing sheets are arranged between the half-thin silencing sheet and the half-thick silencing sheet at intervals.

10. The apparatus of claim 9, wherein: on the same end side, the types of the silencing sheets of the adjacent 2 layers are different, and the airflow channels formed by the adjacent silencing sheet assemblies are arranged in a staggered mode.

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