Air washing and oil-containing waste gas treatment device for railway light oil tank truck

Abstract

The utility model discloses a railway light oil tank truck wind washing and oil-containing waste gas treatment device which comprises at least one wind washing device, the wind washing device is connected to a manhole in the top of a tank truck in a sealing and covering mode, and an air inlet is communicated with the atmosphere and used for filling high-pressure air into the tank truck. An air outlet of the air washing device is communicated with the input end of the waste gas pretreatment system; the waste gas pretreatment system is used for pretreating oil-containing waste gas sucked out by the light oil tank truck; the output end of the waste gas pretreatment system communicates with the input end of the activated carbon adsorption system, the output end of the activated carbon adsorption system discharges oil into air, and the activated carbon adsorption system is used for adsorbing and purifying oil-containing waste gas; electric equipment of the wind washing device, the waste gas pretreatment system and the activated carbon adsorption system is electrically connected with the operation control cabinet. The cleaning of the wind washing device is combined with the waste gas pretreatment system and the activated carbon adsorption system, so that the waste gas is continuously cleaned and treated, and the waste gas treatment efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas treatment technical field especially relates to a railway light oil tank truck air washing and oily waste gas treatment device. BACKGROUND

[0002] Railway light oil tank truck is mainly used for loading and transporting gasoline, kerosene, diesel and other chemical media, and is an important tool for railway transportation of liquid materials, and is widely applied in the transportation fields of petroleum, chemical industry, edible oil and the like, and has the advantages of being mobile and flexible, wide flow range, safe and reliable, less affected by natural factors and the like.

[0003] The purity of petroleum and chemical products is very high, and many products are flammable, explosive and toxic, so the railway chemical tank truck plays a very important role as an important tool for transporting petroleum and chemical products. In order to ensure the quality and safe transportation of petroleum and chemical products, the inner wall of the tank truck must be thoroughly cleaned before product change and maintenance. Light oil tank truck does not have a lower unloading port, but adopts an upper loading and unloading mode, which increases the difficulty of tank cleaning.

[0004] The previous petroleum and chemical plants and railway tank washing stations all adopt a cleaning method combining steam fumigation and flushing, and have the problems of serious environmental pollution, low working efficiency, large energy consumption and high cost. Domestic light oil tank truck cleaning mainly adopts three cleaning processes, namely, open steam tank washing process, open high-pressure air washing process and high-pressure water washing process. Among them, the open high-pressure air washing process directly discharges the waste gas after air washing into the atmosphere without treatment, which does not meet the environmental protection emission requirements and the development concept of energy saving and emission reduction; the open steam tank washing process needs manual tank entry for cleaning after tank steaming, which seriously affects the surrounding environment and the health of workers; the high-pressure water washing process needs special treatment of the waste water after cleaning, such as matching a corresponding sewage treatment system.

[0005] In the existing spraying device, such as the Chinese utility model patent with the patent number CN202311612898.3 discloses a waste gas treatment method and device for oil sewage system, which comprises a separation tower, a low-temperature module, a spraying tower, a heterogeneous ozone catalytic oxidation reactor, a photocatalytic oxidation reactor and an adsorption tower, the separation tower, the low-temperature module, the spraying tower, the heterogeneous ozone catalytic oxidation reactor, the photocatalytic oxidation reactor and the adsorption tower are sequentially connected, and the oil waste gas sequentially passes through the separation tower, the low-temperature module, the spraying tower, the heterogeneous ozone catalytic oxidation reactor, the photocatalytic oxidation reactor and the adsorption tower for treatment. The device still has the following defects: 1, the device can only treat waste gas, and cannot air wash the light oil tank truck; 2, the waste gas collection and waste gas treatment of the device are separately disposed, the waste gas collection needs storage equipment such as gas storage tank or gas storage pool, which not only occupies space, but also has the safety hidden danger of waste gas leakage during storage, and the waste gas collection and waste gas treatment are separately disposed for a long time, and the working efficiency is low. SUMMARY

[0006] The technical problem to be solved by the utility model lies in overcoming the defects of the prior art, providing a railway light oil tank truck air washing and oil-containing waste gas treatment device which combines light oil tank truck air washing and waste gas treatment.

[0007] The utility model discloses the following technical scheme:

[0008] A railway light oil tank truck air washing and oil-containing waste gas treatment device, comprising:

[0009] At least one set of air washing device 1 is sealingly covered and connected to the manhole 61 on the top of the light oil tank truck 6, the air inlet interface 13 is communicated with the atmospheric environment, and is used for providing clean air into the light oil tank truck 6;

[0010] The waste gas pretreatment system 2 is connected to the air outlet interface 14 of the air washing device 1, and the waste gas pretreatment system 2 is used for pretreating the oil-containing waste gas;

[0011] The active carbon adsorption system 3 is connected to the output end of the waste gas pretreatment system 2, and the output end is discharged into the air, and the active carbon adsorption system 3 is used for adsorbing and purifying the oil-containing waste gas;

[0012] The operation control cabinet 4 is electrically connected with the electric equipment of the air washing device 1, the waste gas pretreatment system 2 and the active carbon adsorption system 3.

[0013] Further, the air washing device 1 comprises:

[0014] The cover plate 11 is sealingly installed on the manhole 61, and the air inlet interface 13 and the air outlet interface 14 are respectively arranged on the two sides of the cover plate 11;

[0015] The air washing pipeline 12 is connected to the air inlet 13. When the air washing device 1 is installed, the bottom of the air washing pipeline 12 extends into the middle and lower part of the light oil tank truck 6. The bottom of the air washing pipeline 12 is provided with a plurality of air washing nozzles 15.

[0016] Further, the air washing pipeline 12 is in an inverted "T" shape structure. The air washing pipeline 12 comprises a vertical pipeline 121 and two groups of horizontal pipelines 122 rotatably connected to the bottom of the vertical pipeline 121. The top of the vertical pipeline 121 is connected to the air inlet 13. The rotating ends of the two groups of horizontal pipelines 122 are connected to the bottom of the vertical pipeline 121. The plurality of air washing nozzles 15 are arranged at the bottom of the horizontal pipeline 122.

[0017] The two groups of horizontal pipelines 122 are folded and unfolded by the folding and unfolding device 16. The folding and unfolding device 16 comprises:

[0018] The hinge seat 161 is slidably arranged on the vertical pipeline 121;

[0019] The two connecting rods 162 are respectively hingedly connected to the middle of the two groups of horizontal pipelines 122 and respectively hingedly connected to one end of the hinge seat 161. The two ends of the connecting rod 162 are respectively hingedly connected to the horizontal pipelines 122 and the hinge seat 161 on both sides of the vertical pipeline 121.

[0020] The hydraulic cylinder 163 is arranged on the top of the cover plate 11. The telescopic rod of the hydraulic cylinder 163 passes through the cover plate 11 and is connected to the top of the hinge seat 161.

[0021] Further, the exhaust gas pretreatment system 2 comprises:

[0022] The cyclone spray tower 21 is connected to the air outlet 14 of the air washing device 1 through a pipeline;

[0023] The demister 22 is connected to the output end of the cyclone spray tower 21;

[0024] The dry filter device 23 is connected to the output end of the demister 22 and the input end of the activated carbon adsorption system 3;

[0025] The auxiliary circulating fan 24 is connected to the air outlet 14 and the input end of the cyclone spray tower 21.

[0026] Further, the demister 22 is provided with a demisting baffle 221 near the input end, a demisting wire mesh 222 near the output end, and a drain 223 at the bottom.

[0027] Further, the dry filter device 23 is provided with a stainless steel mesh box 231 near the input end, and an air uniforming plate 232 near the output end.

[0028] Further, the activated carbon adsorption system 3 comprises an activated carbon adsorption box 31 and an adsorption fan 32, the input end of the activated carbon adsorption box 31 is communicated with the output end of the waste gas pretreatment system 2, the output end of the activated carbon adsorption box 31 is communicated with the input end of the adsorption fan 32, and the output end of the adsorption fan 32 is communicated with the air or an exhaust pipe 33.

[0029] Further, the activated carbon adsorption box 31 is provided with a plurality of clamping grooves 311, and the clamping grooves 311 are provided with activated carbon mesh boxes 313 filled with activated carbon.

[0030] Further, the activated carbon adsorption box 31 is provided with a plurality of baffles 312, the plurality of baffles 312 are staggered to form a serpentine channel, the serpentine channel is provided with a plurality of activated carbon mesh boxes 313 filled with activated carbon.

[0031] Further, the air washing device 1, the waste gas pretreatment system 2 and the activated carbon adsorption system 3 are provided with a plurality of temperature, air speed sensors and air pressure instruments.

[0032] The working principle of the utility model is as follows:

[0033] In this utility model, the cover plate 11 of the air washing device 1 is sealed to the manhole 61 on the top of the light oil tanker 6. The air inlet 13 on the cover plate 11 connects to the atmospheric environment, providing air to the air washing pipeline 12. When the auxiliary circulating fan 24 is working, it draws in the oily exhaust gas inside the light oil tanker 6, reducing the air pressure inside the light oil tanker 6 and creating a certain pressure difference between the light oil tanker 6 and the atmospheric environment. The air outside the air inlet 13 is affected by the pressure difference and is drawn in from the air inlet 13 and sprayed out from the air washing nozzle 15 below the air washing pipeline 12 into the light oil tanker 6. The oily exhaust gas is discharged into the air outlet 14 by utilizing the density difference. The oily exhaust gas from multiple light oil tankers 6 is collected into the exhaust gas recovery pipeline 17 through multiple air outlets 14. The exhaust gas recovery pipeline 17 is connected to the air inlet of the auxiliary circulating fan 24. When the auxiliary circulating fan 24 is working, it overcomes the equipment pipeline resistance and creates a certain negative pressure inside the light oil tanker 6, improving cleaning efficiency and cleaning quality. The exhaust gas enters the cyclone spray tower 21 through the outlet of the auxiliary circulating fan 24. The cyclone spray tower 21 pre-treats sticky, oily, fibrous dust, and oil mist, causing particulate matter and droplets in the exhaust gas to be thrown against the tower wall for initial separation. The spray liquid also fully contacts the harmful substances in the exhaust gas, removing them through dissolution and adsorption. The exhaust gas then enters the demister 22, where the demisting baffles 221 and demisting mesh 222 remove mist and liquid phases, reducing the amount of moisture carried into subsequent treatment equipment. Next, the exhaust gas enters the dry filter 23 for initial filtration of the exhaust gas particles, reducing clogging of the activated carbon adsorption equipment and improving adsorption and purification efficiency. After pre-treatment, the exhaust gas enters the activated carbon adsorption box 31 for adsorption and purification. The adsorption fan 32 operates, overcoming the resistance of the activated carbon and pipelines to ensure that the exhaust gas flow rate meets the equipment's processing capacity requirements. After treatment, the waste gas passes through the adsorption fan 32 and enters the exhaust pipe 33, and is then discharged into the atmosphere through the exhaust pipe 33.

[0034] In the air washing device 1, the two sets of horizontal pipes 122 of the air washing pipeline 12 are rotatably connected and connected to both sides of the bottom end of the vertical pipe 121 through pipe rotary joints, so that the horizontal pipes 122 can be rotated and folded. When the hydraulic cylinder 163 is working, the extension rod of the hydraulic cylinder 163 drives the hinge seat 161 to move up and down along the pipe body of the vertical pipe 121. During the movement of the hinge seat 161, the two sets of horizontal pipes 122 are pulled to rotate through the two connecting rods 162, so as to realize the extension and retraction of the horizontal pipes 122.

[0035] The advantages of this utility model compared to the prior art are:

[0036] This utility model combines the cleaning of the air washing device 1 with the waste gas pretreatment system 2 and the activated carbon adsorption system 3, so that the cleaning and treatment of waste gas can be carried out continuously, thereby improving the waste gas treatment efficiency and avoiding the problems of untreated waste gas leakage and storage tank space occupation caused by waste gas storage.

[0037] The two groups of transverse pipelines 122 of the air washing pipeline 12 are rotatably connected and communicated at the bottom end of the vertical pipeline 121 through the pipeline rotary joint, so that the transverse pipeline 122 of the air washing pipeline 12 can be conveniently folded and placed in the light oil tank truck 6, and the transverse pipeline 122 cannot be inserted into the light oil tank truck 6 due to being too long. The two groups of transverse pipelines 122 are driven to be retracted and extended through the retracting and extending device 16, so that the transverse pipeline 122 does not need to be manually rotated, and the transverse pipeline 122 is convenient and fast to be unfolded and folded.

[0038] The air washing device 1 of the utility model extends the air washing pipeline 12 into the lower part of the light oil tank truck 6, and the air washing nozzle 15 on the air washing pipeline 12 is aligned with the bottom of the light oil tank truck 6, when compressed air is sprayed, the exhaust gas at the bottom of the light oil tank truck 6 is extruded by the compressed air and flows to the top of the light oil tank truck 6, so that the exhaust gas at the bottom of the light oil tank truck 6 does not have enough driving force and the flow rate is slow, and the efficiency of replacement of the compressed air and the exhaust gas is improved. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is the flow chart of the utility model embodiment;

[0040] Figure 2 It is the use state diagram of the air washing device of the utility model;

[0041] Figure 3 It is the structural schematic diagram of the exhaust gas pretreatment system and the activated carbon adsorption system of the utility model;

[0042] Figure 4 It is the internal structure schematic diagram of the demister of the utility model embodiment 1;

[0043] Figure 5 It is the internal structure schematic diagram of the dry filter device of the utility model embodiment 1;

[0044] Figure 6 It is the internal structure schematic diagram of the activated carbon adsorption box of the utility model embodiment 1;

[0045] Figure 7 It is the utility model Figure 6 It is the local enlarged view of A in the utility model;

[0046] Figure 8 It is the use state diagram of the activated carbon adsorption box of the utility model embodiment 2;

[0047] Figure 9 It is the three-dimensional structure schematic diagram of the air washing device of the utility model embodiment 3;

[0048] Figure 10 It is the activity state schematic diagram of the air washing device of the utility model embodiment 3.

[0049] Marked number in the drawing:

[0050] 1-Air washing device, 11-Cover plate, 12-Air washing pipeline, 121-Vertical pipeline, 122-Horizontal pipeline, 13-Air inlet interface, 14-Air outlet interface, 15-Air washing nozzle, 16-Retraction device, 161-Hinge seat, 162-Connecting rod, 163-Hydraulic cylinder, 17-Waste gas recovery pipeline;

[0051] 2-Waste gas pretreatment system, 21-Cyclone spray tower, 22-Demister, 221-Demister baffle, 222-Demister wire mesh, 223-Drain outlet, 23-Dry filter device, 231-Stainless steel mesh, 232-Air distribution plate, 233-Dry filter material, 24-Auxiliary circulating fan;

[0052] 3-Activated carbon adsorption system, 31-Activated carbon adsorption box, 311-Card slot, 312-Baffle, 313-Activated carbon mesh box, 32-Adsorption fan, 33-Exhaust pipe;

[0053] 4-Operation control cabinet;

[0054] 6-Light oil tanker, 61-Manhole. Detailed Implementation

[0055] To enable those skilled in the art to better understand the technical solution of this utility model, the specific embodiments are described in detail below with reference to the accompanying drawings.

[0056] Example 1:

[0057] like Figures 1-7 As shown, a railway light oil tank car air washing and oily exhaust gas treatment device includes several sets of air washing devices 1, an exhaust gas pretreatment system 2, an activated carbon adsorption system 3, and an operation control cabinet 4. The air washing devices 1 are used to supply air into the light oil tank car 6; the exhaust gas pretreatment system 2 is used to pretreat the oily exhaust gas; the activated carbon adsorption system 3 is used to adsorb and purify the oily exhaust gas; and the operation control cabinet 4 is used to control the electrical equipment of the air washing devices 1, the exhaust gas pretreatment system 2, and the activated carbon adsorption system 3.

[0058] In an embodiment, such as Figure 2 As shown, the air washing device 1 includes a cover plate 11 and an air washing pipeline 12. The cover plate 11 is designed in the form of a manhole cover for tank cars, which can meet the sealing requirements of tank washing operations for various types of light oil tank cars 6 on railways.

[0059] The air washing device 1 is hoisted onto the manhole 61 of the light oil tanker 6 by the lifting equipment in the air washing workshop. The lifting equipment has a lifting capacity of ≥120kg and can be operated by a single person.

[0060] like Figure 2As shown, the input end of the air washing pipeline 12 is communicated with the air inlet 13, and a one-way valve is arranged on the air inlet 13 for unidirectional conduction of the air inlet 13, so that clean air in the atmospheric environment can enter the light oil tank truck 6 through the suction of the auxiliary circulating fan 24, and the oil-containing waste gas in the light oil tank truck 6 cannot flow to the atmospheric environment from the air inlet 13, thereby preventing the oil-containing waste gas from flowing into the atmospheric environment when the auxiliary circulating fan 24 is not working. The air washing pipeline 12 has an inverted "T" shape or a "Y" shape, and a plurality of air washing nozzles 15 are arranged on the horizontal pipeline 122.

[0061] In the embodiment, as shown in Figure 3 The waste gas pretreatment system 2 includes a cyclone spray tower 21, a demister 22, a dry filter device 23, and an auxiliary circulating fan 24. The waste gas is sequentially introduced into the cyclone spray tower 21, the demister 22, and the dry filter device 23 through the suction of the circulating fan 24 for treatment. The auxiliary circulating fan 24 is used to overcome the pipeline resistance of the equipment and generate a certain negative pressure in the light oil tank truck 6, thereby improving the cleaning efficiency and cleaning quality. A gas monitoring system is arranged at the air inlet of the auxiliary circulating fan 24 for monitoring the concentration of harmful gases in the waste gas before treatment.

[0062] The cyclone spray tower 21 adopts the oil mist separation technology in the prior art, and is mainly configured for the working conditions that cannot be treated by the dry dust removal equipment such as viscous dust, oily dust, and fibrous dust.

[0063] In the embodiment, as shown in Figure 4 The demister 22 in the demister 22 adopts a combination of a demisting baffle 221 and a demisting screen 222, and a drain port 223 is arranged at the bottom of the demister 22. When the waste gas containing water mist flows through the demister 22 at a certain speed, due to the inertial impact of the waste gas, the water mist collides with the wave-shaped plate of the demisting baffle 221, and when the liquid droplets condensed in the water mist are larger than the resultant force of the gas uplift force and the liquid surface tension, the liquid droplets are separated from the surface of the wave-shaped plate. The demisting screen 222 plays a role in separating the mist or dust entrained in the gas phase, thereby reducing the water content of the waste gas when passing through the subsequent treatment equipment. A valve is arranged on the drain port 223, and when the waste gas treatment is completed, the water separated from the demisting baffle 221 and the demisting screen 222 flows to the bottom of the demister 22, and the valve is opened to drain the water from the drain port 223.

[0064] In the embodiment, as shown in Figure 5As shown, the dry filter device 23 box is composed of three stainless steel mesh boxes 231 and air distribution plates 232, and adopts G4+F5+F7 filtering standard for three-stage filtering. The stainless steel mesh box 231 is provided with multiple dry filter materials, and the stainless steel mesh box 231 frame is clamped with dry filter materials. The stainless steel mesh box 231 and the activated carbon mesh box 313 are installed in the same way, and the stainless steel mesh box 231 frame is modularly installed in the dry filter device 23 box, which is convenient for regular replacement. The dry filter material is composed of multiple layers of flame-retardant glass fibers, and the density gradually increases with the thickness. A layer of stainless steel wire mesh is used for supporting, and the multiple layers of fibers have the effects of interception, collision, diffusion and adsorption on dust particles to contain dust particles in the material. The dry filter device has the advantages of high combined purification efficiency, large capacity 14kg-15kg / m 2 , easy cleaning, low operating cost, and multiple reuse.

[0065] In the embodiment, as shown in Figure 3 , the activated carbon adsorption system 3 includes an activated carbon adsorption box 31 and an adsorption fan 32. The input end of the activated carbon adsorption box 31 is connected to the output end of the waste gas pretreatment system 2, the output end of the activated carbon adsorption box 31 is connected to the input end of the adsorption fan 32, the output end of the adsorption fan 32 is connected to the air or the exhaust pipe 33, and the exhaust pipe 33 is used to discharge the treated waste gas into the atmosphere.

[0066] In the embodiment, as shown in Figure 6 , 7 The activated carbon adsorption box 31 is provided with a plurality of clamping grooves 311, and the clamping grooves 311 are inserted with activated carbon mesh boxes 313. The activated carbon mesh boxes 313 are filled with activated carbon, and the width and height of the activated carbon mesh boxes 313 are matched with the width and height of the inside of the activated carbon adsorption box 31.

[0067] The activated carbon adsorption box 31 adopts a metal box structure or a brick structure, which is convenient to fill and replace. The activated carbon filled in the activated carbon mesh box 313 adopts a honeycomb-shaped activated carbon, which has the advantages of low resistance, low consumption and high adsorption rate, and is suitable for large air volume use. The inside or interlayer of the activated carbon adsorption box 31 is provided with heat preservation materials, which can effectively avoid the influence of external temperature.

[0068] In the embodiment, the operation control cabinet 4 is provided with an electrostatic elimination device, which can select an ion fan or an electrostatic eliminator. A human body static electricity elimination and release device is arranged on the ground beside the operation control cabinet 4, which is used to guide and eliminate static electricity on the human body, equipment and the like, to prevent static sparks.

[0069] In this embodiment, temperature and wind speed sensors and pressure gauges are installed on the pipelines connecting the auxiliary circulating fan 24, the cyclone spray tower 21, the demister 22, the dry filter 23, and the activated carbon adsorption box 31. Real-time gas monitoring equipment is installed on the pipelines connecting the air inlet of the auxiliary circulating fan 24 and the air outlet of the activated carbon adsorption box 31, providing real-time monitoring and early warning functions before and after waste gas treatment.

[0070] Example 2:

[0071] like Figure 8 As shown, compared with Example 1, the activated carbon adsorption box 31 of Example 2 is provided with several baffles 312, which are arranged in an alternating manner to form a serpentine channel. Several activated carbon mesh boxes 313 are arranged in the serpentine channel and filled with activated carbon. The serpentine channel formed by the alternating arrangement of several baffles 312 is used to extend the channel length for contact between oily waste gas and activated carbon, extend the contact time between oily waste gas and activated carbon, and enhance the adsorption effect of activated carbon.

[0072] When replacing activated carbon, the operator simply pulls out the activated carbon mesh box 313 that needs to be replaced, pours out the used activated carbon from the mesh box 313, fills the mesh box 313 with dry, unused activated carbon, and then puts the mesh box 313 back into the activated carbon adsorption box 31. The operation is simple and convenient, shortening the time required to replace activated carbon.

[0073] Example 3:

[0074] like Figure 9 As shown, compared with Embodiment 1, the air washing duct 12 in Embodiment 3 has an inverted "T" shaped structure. The air washing duct 12 includes a vertical duct 121 and two sets of horizontal ducts 122 rotatably connected to both sides of the bottom end of the vertical duct 121. The top of the vertical duct 121 is connected to the air inlet interface 13, and the rotating ends of the two sets of horizontal ducts 122 are connected to the bottom end of the vertical duct 121.

[0075] In the embodiment, as shown in the figure, the two sets of transverse pipes 122 are folded and unfolded by the retracting device 16, which makes it easier to rotate and fold the transverse pipes 122 of the air washing pipe 12 to reduce the width of the air washing pipe 12, and prevent the transverse pipes 122 from being too long to be able to extend into the light oil tanker 6 through the manhole 61.

[0076] The retraction and extension device 16 comprises a hinged seat 161, two connecting rods 162 and a hydraulic cylinder 163, the middle part of the hinged seat 161 is slidably arranged on the vertical pipeline 121; one end of the first connecting rod 162 is hingedly connected to the middle part of the horizontal pipeline 122 on the left side of the vertical pipeline 121, and the other end is hingedly connected to the end hinged hole of the hinged seat 161 on the right side of the vertical pipeline 121; one end of the second connecting rod 162 is hingedly connected to the middle part of the horizontal pipeline 122 on the right side of the vertical pipeline 121, and the other end is hingedly connected to the end hinged hole of the hinged seat 161 on the left side of the vertical pipeline 121; the two connecting rods 162 cross-connect two groups of horizontal pipelines 122, so that the hinged points of the hinged seat 161, the middle part of the horizontal pipeline 122 and the hinged point of the rotating end are prevented from rotating to three points in a line to form a rotating dead point, and the situation that the horizontal pipeline 122 cannot rotate can be avoided.

[0077] The telescopic rod of the hydraulic cylinder 163 is connected to the top of the hinged seat 161 through the cover plate 11, and when the hydraulic cylinder 163 works, the telescopic rod of the hydraulic cylinder 163 drives the hinged seat 161 to move up and down along the vertical pipeline 121, and the hinged seat 161 is pulled to rotate two groups of horizontal pipelines 122 in the moving process through the two connecting rods 162. The hydraulic cylinder 163 can also be replaced by an electric cylinder, an air cylinder or other automatic telescopic mechanism.

[0078] In the embodiment, the total length of the bottom horizontal pipeline 122 of the air washing pipeline 12 is 2300-2400 mm, and the distance from the tank opening is 1495-1600 mm. The cover plate 11 and the air washing pipeline 12 are designed in an integrated manner, and the total weight is ≤120 kg.

[0079] Embodiment 4:

[0080] Compared with embodiment 1, the air inlet interface 13 of the air washing device 1 of embodiment 4 is not provided with a one-way valve, the air inlet interfaces 13 of a plurality of air washing devices 1 are connected in parallel to communicate with the air compression equipment, and the air compression equipment is used to fill compressed air into the light oil tank truck 6.

[0081] The working mode of the utility model:

[0082] When the device is used:

[0083] Step 1: after the train carrying the light oil tank truck 6 arrives at the designated station in the operation workshop, it is confirmed that the train is stable, the sealing cover on the manhole 61 of the light oil tank truck 6 is removed, and the residual liquid in the light oil tank truck 6 is pumped out through the suction equipment;

[0084] Step 2: a air washing device 1 is hoisted on the manhole 61 at the top of each light oil tank truck 6 through the hoisting equipment in the operation workshop, the air washing pipeline 12 extends into the light oil tank truck 6 from the manhole 61, the cover plate 11 is tightly sealed on the manhole 61, and the cover plate 11 is fixed on the manhole 61 through bolts.

[0085] When the wind washing device 1 is of the structure of Embodiment 3, the hydraulic cylinder 163 is operated in advance to retract the telescopic rod of the hydraulic cylinder 163, and the two sets of transverse pipelines 122 are pulled to rotate and fold through the hinged seat 161 and the two connecting rods 162. After the two sets of transverse pipelines 122 are folded, the diameter of the wind washing pipeline 12 is smaller than the diameter of the manhole 61, the wind washing device 1 is hoisted onto the manhole 61, and after the wind washing device 1 is hoisted, the telescopic rod of the hydraulic cylinder 163 is operated to extend, and the two sets of transverse pipelines 122 are pushed to unfold through the hinged seat 161 and the two connecting rods 162.

[0086] Step 3: The air outlets 14 of the several wind washing devices 1 are connected in parallel through the waste gas recovery pipeline 17 and are communicated with the air inlet of the auxiliary circulating fan 24, and whether the pipelines of the waste gas pretreatment system 2 and the activated carbon adsorption system 3 are correctly communicated is checked.

[0087] Step 4: The operator controls the auxiliary circulating fan 24, the circulating pump in the cyclone spray tower 21 and the adsorption fan 32 to be turned on through the operation control cabinet 4, air enters the light oil tank truck 6 through the wind washing device 1, and the inside of the light oil tank truck 6 is started to be wind washed. Under the action of compressed air, the auxiliary circulating fan 24 and the adsorption fan 32, the oil-containing waste gas sequentially passes through the cyclone spray tower 21, the demister 22, the dry filter device 23, the spray, the demister, the filter and the adsorption of the activated carbon adsorption box 31, and is treated, and the waste gas treatment reaches the emission requirement and is discharged to the atmosphere environment from the exhaust pipe 33.

[0088] When the real-time monitoring equipment on the pipeline of the air outlet of the activated carbon adsorption box 31 monitors that the concentration of toxic and harmful substances, the concentration of inhalable particulate matters and other values in the waste gas are close to the emission standard values, the auxiliary circulating fan 24, the circulating pump in the cyclone spray tower 21 and the adsorption fan 32 are turned off through the operation control cabinet 4, the dry filter material in the stainless steel mesh box 231 in the dry filter device 23 and the activated carbon in the activated carbon mesh box 313 in the activated carbon adsorption box 31 are replaced according to the corresponding close values.

[0089] It should be noted that the technical solutions of the present application are described in detail above, the principles of the present application are described, and the description of the above working principles is only used to help understand the core idea of the present application. It should be pointed out that for ordinary skilled persons in the technical field, the present application can be improved and modified without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0090] The skilled in the art to which the utility model belongs can make modifications or supplements to the described specific embodiments or adopt similar ways to replace, as long as the structure of the utility model is not deviated or beyond the range defined by the present claim, which belongs to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A device for air washing and oily exhaust gas treatment of railway light oil tank cars, characterized in that, The utility model relates to a light oil tank truck exhaust gas cleaning device, which comprises the following components: at least one set of air washing device (1) is sealed and covers the manhole (61) connected on the top of light oil tank truck (6), and the air inlet (13) is communicated with the atmosphere environment, which is used for providing clean air into the light oil tank truck (6); waste gas pretreatment system (2) is communicated with the air outlet (14) of air washing device (1) in the input end, and the waste gas pretreatment system (2) is used for pretreating the oil-containing waste gas; active carbon adsorption system (3) is communicated with the output end of waste gas pretreatment system (2) in the input end, and the output end is discharged to the air, and the active carbon adsorption system (3) is used for adsorbing and purifying the oil-containing waste gas; operating control cabinet (4) is electrically connected with the electric equipment of air washing device (1), waste gas pretreatment system (2) and active carbon adsorption system (3).

2. The railway light oil tank car air washing and oil-laden exhaust gas treatment device according to claim 1, characterized in that: The air washing device (1) comprises: cover plate (11) is sealed and installed on the manhole (61), and the air inlet (13) and the air outlet (14) are arranged on the two sides of the cover plate (11) respectively; air washing pipeline (12) is communicated with the air inlet (13) in the input end, and when the air washing device (1) is installed, the bottom of the air washing pipeline (12) is inserted into the middle and lower part of the light oil tank truck (6), and a plurality of air washing spouts (15) are arranged on the bottom of the air washing pipeline (12).

3. The railway light oil tank car air washing and oil-laden exhaust gas treatment apparatus according to claim 2, characterized by: The air washing pipeline (12) is inverted "T" shape structure, and the air washing pipeline (12) comprises vertical pipeline (121) and two groups of horizontal pipelines (122) rotatably connected on the two sides of the bottom end of the vertical pipeline (121); the vertical pipeline (121) is communicated with the air inlet (13) on the top, and the two groups of horizontal pipelines (122) are communicated with the bottom end of the vertical pipeline (121) on the rotating end, and a plurality of air washing spouts (15) are arranged on the bottom of the horizontal pipeline (122); The two groups of horizontal pipelines (122) are folded and unfolded through the folding and unfolding device (16), and the folding and unfolding device (16) comprises: hinged seat (161) is slidably arranged on the vertical pipeline (121); two connecting rods (162) are hingedly connected to the middle of the two groups of horizontal pipelines (122) respectively, and the other end is hingedly connected to one end of the hinged seat (161) respectively, and the two ends of one connecting rod (162) are hingedly connected to the horizontal pipeline (122) and the end of the hinged seat (161) respectively, which are located on the two sides of the vertical pipeline (121); hydraulic cylinder (163) is arranged on the top of the cover plate (11), and the telescopic rod of the hydraulic cylinder (163) passes through the cover plate (11) downward and is connected with the top of the hinged seat (161).

4. The railway light oil tank car air washing and oil-laden exhaust gas treatment apparatus according to claim 1, characterized by: The waste gas pretreatment system (2) comprises: cyclone spray tower (21) is communicated with the air outlet (14) of air washing device (1) through pipeline in the input end; mist eliminator (22) is communicated with the output end of cyclone spray tower (21) in the input end; dry filter device (23) is communicated with the output end of mist eliminator (22) in the input end, and the output end is communicated with the input end of active carbon adsorption system (3); auxiliary circulating fan (24) is communicated with the air outlet (14) in the input end, and the output end is communicated with the input end of cyclone spray tower (21).

5. The railway light oil tank car air washing and oil-laden exhaust gas treatment apparatus according to claim 4, characterized by: The demister (22) is provided with a demisting baffle (221) near the input end, a demisting wire mesh (222) near the output end, and a drain (223) at the bottom.

6. The railway light oil tank car air washing and oil-laden exhaust gas treatment apparatus according to claim 4, characterized by: The dry filter device (23) is provided with at least one stainless steel mesh box (231) near the input end, and an air uniformizing plate (232) near the output end.

7. The railway light oil tank car air washing and oil-laden exhaust gas treatment apparatus according to claim 1, characterized by: The active carbon adsorption system (3) comprises an active carbon adsorption box (31) and an adsorption fan (32), the input end of the active carbon adsorption box (31) is connected to the output end of the waste gas pretreatment system (2), the output end of the active carbon adsorption box (31) is connected to the input end of the adsorption fan (32), and the output end of the adsorption fan (32) is connected to the air or an exhaust pipe (33).

8. The railway light oil tank car air washing and oil-laden exhaust gas treatment apparatus according to claim 7, characterized by: The active carbon adsorption box (31) is provided with a plurality of clamping grooves (311), and the clamping grooves (311) are provided with active carbon mesh boxes (313) filled with active carbon.

9. The railway light oil tank car air washing and oil-laden exhaust gas treatment apparatus according to claim 7, characterized by: The active carbon adsorption box (31) is provided with a plurality of baffles (312) staggered to form a serpentine channel, and the serpentine channel is provided with a plurality of active carbon mesh boxes (313) filled with active carbon.

10. The railway light oil tank car air washing and oil-laden exhaust gas treatment apparatus according to claim 1, characterized by: The air washing device (1), the waste gas pretreatment system (2) and the active carbon adsorption system (3) are provided with a plurality of temperature, air speed sensors and air pressure instruments.

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