CN215137788U - Test bench exhaust apparatus with oil-gas separation device - Google Patents

Abstract

The test bed exhaust device with the oil-gas separation device is characterized in that two ends of a vertical 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; an exhaust pipeline of the first engine test bed is communicated with an inlet of an exhaust main pipeline, and an outlet of the exhaust main pipeline is communicated with a silencing device; the silencing device comprises a tower body, a variable-frequency diffuser and a silencing piece assembly; 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. The device of the utility model, it is little to take up an area of, is applicable to large-traffic gaseous oil-gas separation, can realize that oil drops 99% get rid of and can adapt to any gas of taking liquid. Meanwhile, the silencing device creatively provides a thin and thick combined silencing sheet flat sheet, so that the thin silencing sheet and the thick silencing sheet are respectively arranged on the side of one airflow channel 2, the number of the silencing sheets is reduced on the premise of ensuring silencing capacity, the occupied area is small, the application range is wide, and the cost is greatly reduced.

Description

Test bench exhaust apparatus with oil-gas separation device

Technical Field

The utility model relates to a gas-liquid separation technique and amortization fall the technical field of making an uproar, concretely relates to test bench exhaust apparatus with oil-gas separation device.

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.

Disclosure of Invention

The technical solution problem of the utility model is that: the defects of the prior art are overcome, and the test bed exhaust device with the oil-gas separation device is provided.

The technical solution of the utility model is that:

a test bed exhaust device with an oil-gas separation device comprises a first engine test bed exhaust pipeline, a second engine test bed exhaust pipeline, an exhaust main pipeline, a vertical oil-gas separation device and a silencer; two ends of the vertical 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; an exhaust pipeline of the first engine test bed is communicated with an inlet of an exhaust main pipeline, and an outlet of the exhaust main pipeline is communicated with a silencing device; the vertical 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 through a gas conveying pipeline; the demister comprises a shell formed by sequentially connecting an upper end enclosure, a shell section and a lower end enclosure, an air inlet is formed in the lower portion of the shell section and is communicated with an outlet of an exhaust pipeline of a second engine test bed, and a gas outlet of the demister is formed in the top of the upper end enclosure; a baffle plate demister is arranged above the air inlet in the cylinder section, a wire mesh demister is arranged at the top in the cylinder section, and the wire mesh demister is positioned above the baffle plate demister; a spraying and washing device is arranged on the side wall of the shell section; a liquid outlet is arranged at the bottom of the lower end enclosure; 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, the bottom of the activated carbon box body is provided with a liquid outlet of the activated carbon adsorption device.

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 test bed exhaust device with the oil-gas separation device, the oil-gas separation silencer has small occupied area, is suitable for oil-gas separation of large-flow gas, 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 test bench exhaust apparatus with oil-gas separation device, 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 board interval 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 test bench exhaust apparatus with oil-gas separation device, oil-gas separation silencing device adopts and sprays washing unit to wash 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 test bench exhaust apparatus with oil-gas separation device, oil-gas separation silencing device sets up active adsorption carbon device, adsorbs to the oil drop below 5 mu m, adsorbs can make organic waste gas purification efficiency up to 90-95%, and then guarantees to pass through the utility model discloses a gas after vertical oil-gas separation device handles accords with national emission standard, in addition, can use hot-air desorption regeneration messenger active carbon to come into operation again or change after the active carbon adsorption saturation.

5. In the test bed exhaust device with the oil-gas separation device, 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 silencer and the thin plate component of half silencer), has small floor area (is also suitable for a small-flow engine vehicle test bed when being suitable for a large-flow vehicle test bed), the application range is wide, and the cost is greatly reduced.

6. The utility model discloses an among the test bench exhaust apparatus with oil-gas separation device, 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 getting into the frequency conversion diffuser barrel, the efficiency of amortization has been improved to the follow-up amortization of being convenient for.

7. The utility model discloses an among the test bench exhaust apparatus with oil-gas separation device, 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 high frequency skew through doing frequency conversion diffuser venthole, utilizes the high frequency to compare the degree of difficulty that the noise control that the low frequency easily muffles the control principle and reduce.

8. The utility model discloses an among the test bench exhaust apparatus with oil-gas separation device, 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.

Drawings

Fig. 1 is a schematic diagram of the test bench exhaust device with the oil-gas separation device of the present invention.

Fig. 2 is the structure diagram of the vertical oil-gas separation device in the test bed exhaust device with the oil-gas separation device of the utility model.

Fig. 3 is a sectional view a-a in fig. 2.

Fig. 4 is a schematic diagram of the vertical oil-gas separator with two barbs S2 type baffle demister in the test bed exhaust apparatus with the oil-gas separation device of the present invention.

Fig. 5 is a schematic diagram of the vertical oil-gas separator with three barbs S3 type baffle demister in the test bed exhaust apparatus with the oil-gas separation device of the present invention.

Fig. 6 is a schematic diagram of the vertical oil-gas separator with four barbs S4 type baffle demister in the test bed exhaust apparatus with the oil-gas separation device of the present invention.

Fig. 7 is a schematic view of the working principle of the vertical active carbon adsorption device of the oil-gas separator in the test bed exhaust device with the oil-gas separation device of the present invention.

Fig. 8 is a schematic structural diagram of a silencer in the test bed exhaust device with the oil-gas separation device of the present invention.

Fig. 9 is a schematic structural diagram of the internal structure of the silencer in the test bed exhaust device with the oil-gas separation device of the present invention.

Fig. 10 is a schematic structural diagram of a 3-layer noise reduction sheet assembly in the test bed exhaust apparatus with the oil-gas separation device according to the present invention.

Fig. 11 is a schematic structural diagram of a 1-layer noise damping sheet assembly in the test bed exhaust apparatus with the oil-gas separation device of the present invention.

Fig. 12 is a schematic structural diagram of the variable frequency diffuser in an angular direction in the test bed exhaust apparatus with the oil-gas separation device of the present invention.

Fig. 13 is a schematic structural diagram of the variable frequency diffuser in another angular direction in the test bed exhaust apparatus with the oil-gas separation device of the present invention.

Fig. 14 is the structure diagram of the flow guide cone of the variable frequency diffuser in the test bed exhaust device with the oil-gas separation device of the present invention.

Fig. 15 is a schematic structural view of a semi-thin silencing sheet in the test bed exhaust device with the oil-gas separation device of the present invention.

Fig. 16 is a schematic structural view of a semi-thick silencing plate in the test bed exhaust device with the oil-gas separation device of the present invention.

Fig. 17 is a schematic structural diagram of a thin and thick combined silencing plate in the test bed exhaust device with the oil-gas separation device 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 to 17, a test bed exhaust device with an oil-gas separation device comprises a first engine test bed exhaust pipeline 10, a second engine test bed exhaust pipeline 20, an exhaust main pipeline 30, a vertical oil-gas separation device 200 and a silencer 100.

Two ends of the vertical oil-gas separation device 200 are respectively communicated with inlets of a second engine test bed exhaust pipeline 20 and the exhaust main pipeline 30; the first engine test bed exhaust pipeline 10 is communicated with the inlet of the exhaust main pipeline 30, and the outlet of the exhaust main pipeline 30 is communicated with the silencer 100.

The vertical 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 through a gas conveying pipeline 230; the demister 210 comprises a shell body formed by sequentially connecting an upper sealing head 214, a shell section 215 and a lower sealing head 216, wherein the lower part of the shell section 215 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 top of the upper sealing head 214 is provided with a gas outlet of the demister 210; a baffle plate demister 211 is arranged in the cylindrical shell 215 above the air inlet 213, a wire mesh demister 212 is arranged at the top in the cylindrical shell 215, and the wire mesh demister 212 is arranged above the baffle plate demister 211; 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 bottom of the lower end enclosure 216 is provided with demister support legs 219, and the elevation of the demister 210 is adjusted by adjusting the demister support legs 219, so as to adapt to pipelines with different elevations.

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.

The side walls of the bowl section 215 are fitted with spray rinsing means, preferably comprising a first spray rinsing means 2171, a second spray rinsing means 2172, a third spray rinsing means 2173 and a fourth spray rinsing means 2174. The baffle plate demister 211 is washed by the spray head, and scales attached to the baffle plate demister 211 after long-term operation are washed and removed.

The bottom of the lower head 216 is provided with a liquid outlet 218 for intensively discharging the discharged liquid.

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

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;

the gas discharged from the gas outlet 225 of the activated carbon box 221 enters from the end face of the 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 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 is easier to eliminate noise than the low frequency; 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. A test bed exhaust device with an oil-gas separation device is characterized by comprising a first engine test bed exhaust pipeline, a second engine test bed exhaust pipeline, an exhaust main pipeline, a vertical oil-gas separation device and a silencing device;

two ends of the vertical 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; an exhaust pipeline of the first engine test bed is communicated with an inlet of an exhaust main pipeline, and an outlet of the exhaust main pipeline is communicated with a silencing device;

the vertical 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 through a gas conveying pipeline;

the demister comprises a shell formed by sequentially connecting an upper end enclosure, a shell section and a lower end enclosure, an air inlet is formed in the lower portion of the shell section and is communicated with an outlet of an exhaust pipeline of a second engine test bed, and a gas outlet of the demister is formed in the top of the upper end enclosure;

a baffle plate demister is arranged above the air inlet in the cylinder section, a wire mesh demister is arranged at the top in the cylinder section, and the wire mesh demister is positioned above the baffle plate demister; a spraying and washing device is arranged on the side wall of the shell section; a liquid outlet is arranged at the bottom of the lower end enclosure;

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, the bottom of the activated carbon box body is provided with a liquid outlet of the activated carbon adsorption device.

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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