Nitrogen atmosphere purification device for roller kiln

Abstract

The utility model belongs to the technical field of roller kilns, and particularly relates to a roller kiln nitrogen atmosphere purification device and a fan, an air inlet of the fan is communicated with the interior of a roller kiln, an air outlet of the fan is communicated with a plurality of groups of heat exchangers through a switching structure, and one side of each heat exchanger is communicated with a first calandria. The multiple first row pipes are communicated with the same collecting main pipe, the discharging end of the collecting main pipe is communicated with a washing structure, one side of the washing structure is communicated with an adsorption assembly, one side of the adsorption assembly is communicated with a first nitrogen storage tank, and the first nitrogen storage tank is communicated with the interior of the roller kiln through the nitrogen row pipes. By rotating the rotating ring, the rotating ring drives the air guide disc to rotate through the rotating shaft, so that the two ends of the flow guide through hole are respectively communicated with the air inlet cavity and the other exhaust cavity, and the exhaust cavity which is originally communicated with the flow guide through hole is blocked by the air guide disc, so that the whole production process can be smoothly carried out when the adsorption tower is cleaned and maintained.

Description

TECHNICAL FIELD

[0001] The utility model belongs to roller kiln technical field, especially relates to a roller kiln nitrogen atmosphere purification device. BACKGROUND

[0002] As the core key material of lithium battery, the research and development of the electrochemical performance and manufacturing technology of lithium iron phosphate is the breakthrough and driving force for promoting the healthy and rapid development of lithium battery industry, lithium iron phosphate is synthesized by roller kiln high temperature solid phase method in the production process, the atmosphere in the roller kiln is nitrogen, in the production process, tail gas (i.e. 99% nitrogen and a small amount of organic matter and other impurities) will be produced in the roller kiln, if the tail gas is directly discharged, a large amount of nitrogen in the tail gas is not recycled, which causes waste of resources. CONTENT

[0003] (I) the technical problem solved

[0004] The utility model discloses a roller kiln heat energy recycling and atmosphere purification device to solve the problem that a large amount of nitrogen in the tail gas is not recycled when discharging the tail gas, causing waste of resources.

[0005] (II) technical content

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A roller kiln nitrogen atmosphere purification device, including roller kiln and the fan of installation in one side of roller kiln, the air inlet of fan is linked together with the inside of roller kiln, and the air outlet of fan is communicated with multiple groups of heat exchangers through adapter structure, and the side of multiple groups of heat exchangers is communicated with first row pipe, and multiple first row pipes are communicated with the same root collection main pipe, and the discharge end of collection main pipe is communicated with water washing structure, and the side of water washing structure is communicated with adsorption assembly, and the side of adsorption assembly is communicated with first nitrogen storage tank, and first nitrogen storage tank is communicated with the inside of roller kiln through nitrogen exhaust pipe.

[0008] Further, the adapter structure includes an outer protective shell and a blade, the outer protective shell is hollow inside and has an open end, the air outlet of the fan is connected to the open end of the outer protective shell, the blade is rotatably connected inside the outer protective shell, a plurality of communication ports are circumferentially and equidistantly formed on the blade, and a barrier is arranged between adjacent two communication ports.

[0009] The side, away from the fan, of the outer protective shell is connected to a plurality of adapter sockets, and the adapter sockets are connected to the air outlet of the fan through the communication ports.

[0010] Further, the number of adapter sockets is twice the number of communication ports, and the number of heat exchangers is the same as the number of adapter sockets, the adapter sockets are connected with the inlets of the heat exchangers through the flow pipeline, and the two adapter sockets adjacent to the adapter socket connected with the fan outlet are in contact with the blocking part;

[0011] The outer wall of the outer protective shell is provided with a first guide groove, the first guide groove is in communication with the outer wall of the blade, the outer wall of the blade is fixedly connected with a lever, and the free end of the lever extends out of the first guide groove.

[0012] The plurality of heat exchangers are connected with an external nitrogen supply system, and the plurality of heat exchangers are connected with a second nitrogen storage tank through a pipeline.

[0013] Further, the water washing structure comprises a water washing sealed tank and an exhaust pipe, an air bag is detachably installed at the bottom of the inner cavity of the water washing sealed tank, the discharge end of the collecting main pipe penetrates the water washing sealed tank and is connected with the air bag, the pipe body of the collecting main pipe is connected with a plurality of branch pipes corresponding to the plurality of first exhaust pipes, the free end of the first exhaust pipe is detachably inserted into the branch pipe, and the pipe body of the plurality of branch pipes is connected with a first one-way valve.

[0014] The exhaust pipe is connected to the top of the water washing sealed tank.

[0015] The top of the air bag is provided with a plurality of exhaust holes.

[0016] Further, a wire mesh demister is installed on the inner wall of the water washing sealed tank, a plurality of fixed clamping sleeves are fixedly connected to the outer surface of the water washing sealed tank, the same water suction pipe is sleeved on the plurality of fixed clamping sleeves, the water inlet end of the water suction pipe penetrates the water washing sealed tank and extends into the water washing sealed tank, and the water inlet end of the water suction pipe is located between the air bag and the wire mesh demister.

[0017] A spray head is further installed in the water washing sealed tank, the spray head is located above the wire mesh demister, the top of the spray head is connected with a suction pump, and the water outlet end of the water suction pipe is connected with the suction pump.

[0018] Further, the water washing sealed tank is further connected with a drain faucet and a water inlet faucet, the water inlet faucet is connected with an external water source, and a viewing window is embedded on the tank body of the water washing sealed tank.

[0019] Further, the pipe body of the exhaust pipe is connected with a condensation collector, the free end of the exhaust pipe is connected with an air compressor, and the air outlet end of the air compressor is connected with a direction adjusting structure.

[0020] The direction adjusting structure comprises a gas guide plate, an air inlet cavity and two air outlet cavities are formed in the inner part of the gas guide plate, and a gas guide disc is rotatably connected in the inner part of the gas guide plate.

[0021] The air guide disc is internally provided with a flow guide through hole, and the two ends of the flow guide through hole are respectively connected with the air inlet cavity and one of the air outlet cavities;

[0022] The air outlet end of the air compressor is connected with the air inlet cavity.

[0023] Further, one side of the air guide disc is fixedly connected with a rotating shaft, the free end of the rotating shaft penetrates through the air guide plate and extends outward, the shaft body of the rotating shaft is fixedly sleeved with a rotating ring, two prompt rods are arranged on the rotating ring, and the two prompt rods correspond to the through hole path of the flow guide through hole;

[0024] The adsorption assembly comprises a support frame and two groups of adsorption towers, the two groups of adsorption towers are installed on one side of the support frame in an up-down mode, and the inside of the adsorption tower is provided with an activated carbon plate;

[0025] The two air outlet cavities are provided with first air outlet pipelines, and the air outlet cavities are connected with the inside of the adsorption tower through the first air outlet pipelines;

[0026] One side of the two groups of adsorption towers is provided with two extraction pipes, the free ends of the two extraction pipes are both connected with third one-way valves, one of the extraction pipes is detachably connected with a vacuum pump through the third one-way valve, and the top of the two groups of adsorption towers is provided with an air pressure gauge.

[0027] Further, one side of the first nitrogen storage tank is connected with a second one-way valve, one side of the two groups of adsorption towers is connected with second air outlet pipelines, and the free end of one of the second air outlet pipelines is detachably inserted into the second one-way valve.

[0028] Further, the top of the first nitrogen storage tank is connected with a nitrogen input pump and an oxygen concentration detector respectively, the oxygen concentration detector and the nitrogen input pump are electrically connected, and the nitrogen input pump is connected with the nitrogen discharge pipe.

[0029] (Three) beneficial effects

[0030] Compared with the prior art, the beneficial effects of the utility model lie in:

[0031] I. In the utility model, when the heat exchanger in the working state needs to be cleaned and maintained, the dial lever is only needed to be dialed, the dial lever drives the blade to rotate, after the rotation is completed, the adapter socket connected with the communication port stops communicating with the communication port and contacts the blocking part, at this time, the corresponding heat exchanger is closed, and the maintenance and cleaning are carried out.

[0032] The adapter socket in contact with the blocking part stops contacting the blocking part and communicates with the communication port after the blade rotates, and at the same time, the corresponding heat exchanger is opened, at this time, the tail gas is transported to the outer protective shell by the fan, and then flows into the heat exchanger through the communication port, the adapter socket and the flow pipeline to exchange heat, so that the production process can still be carried out smoothly during the cleaning and maintenance of the heat exchanger.

[0033] II. In the utility model, when needing to clean and maintain the adsorption tower, the rotary ring is rotated, the rotary ring drives the air guide disc to rotate through the rotating shaft, and then the two ends of the flow guide through hole are communicated with the air inlet cavity and another air outlet cavity respectively, and the air outlet cavity originally communicated with the flow guide through hole is blocked by the air guide disc, so that the whole production process can be smoothly carried out when the adsorption tower is cleaned and maintained.

[0034] III. In the utility model, the top of the air bag is provided with a plurality of exhaust holes, the exhaust gas can be uniformly dispersed and discharged through the plurality of exhaust holes, the contact area of the exhaust gas and water is increased, and the dissolution efficiency is improved.

[0035] IV. In the utility model, the pump generates suction force on the water suction pipe, so that the water in the water washing sealed tank flows into the water suction pipe, and the water is transported to the spray head through the pump, the water is sprayed out through the spray head, the wire mesh demister is flushed, and then the wire mesh demister is prevented from being blocked, so that the water-washed exhaust gas can pass through unobstructed. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a three-dimensional schematic view of the whole utility model;

[0037] Figure 2 It is a three-dimensional schematic view of the whole utility model from another angle; Figure 1 It is a partial enlarged schematic view of position A in the middle;

[0038] Figure 3 It is a three-dimensional schematic view of the whole utility model from another angle;

[0039] Figure 4 It is a three-dimensional schematic view of the whole utility model from another angle; Figure 3 It is a partial enlarged schematic view of position B in the middle;

[0040] Figure 5 It is an exploded schematic view of the fan and the switching structure in the utility model;

[0041] Figure 6 It is a schematic view of the inside of the water washing sealed tank in the utility model;

[0042] Figure 7 It is a schematic view of the inside of the water washing sealed tank in the utility model; Figure 6 It is a partial enlarged schematic view of position C in the middle;

[0043] Figure 8 It is a schematic view of the air compressor, the adsorption assembly, the direction switching structure, the vacuum pump and the first nitrogen storage tank in the utility model;

[0044] Figure 9 It is a schematic view of the air compressor, the adsorption assembly, the direction switching structure, the vacuum pump and the first nitrogen storage tank in the utility model; Figure 8 It is a partial enlarged schematic view of position D in the middle;

[0045] Figure 10It is the schematic view of the inside of the air guide plate in the utility model.

[0046] Figure 11 It is the schematic view of the inside of the air guide plate in the utility model.

[0047] In the figure: 1, roller kiln; 2, fan; 3, heat exchanger; 4, first row pipe; 5, collection main pipe; 6, first nitrogen storage tank; 7, nitrogen discharge pipe; 8, outer protective shell; 9, vane; 10, communication port; 11, blocking part; 12, adapter jack; 13, flow-through pipeline; 14, first guide groove; 15, lever; 16, water-washing sealing tank; 17, exhaust pipe; 18, air bag; 19, branch pipe; 20, first check valve; 21, exhaust hole; 22, wire mesh demister; 23, fixed clamping sleeve; 24, water pumping pipe; 25, spray head; 26, pumping pump; 27, drain faucet; 28, water inlet faucet; 29, visual window; 30, condensing collector; 31, air compressor; 32, air guide plate; 33, air inlet cavity; 34, air outlet cavity; 35, air guide plate; 36, flow guide through hole; 37, support rack; 38, adsorption tower; 39, first exhaust pipeline; 40, separation pipe; 41, vacuum pump; 42, air pressure gauge; 43, second check valve; 44, second exhaust pipeline; 45, prompt rod; 46, nitrogen input pump; 47, oxygen concentration detector; 48, third check valve; 49, rotating shaft; 50, rotating ring; 51, second nitrogen storage tank; 52, nitrogen discharge pipe. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0049] Embodiment one

[0050] As Figures 1-11As shown, a roller kiln nitrogen atmosphere purification device, including roller kiln 1 and installed on one side of the roller kiln 1 fan 2, the fan 2 air inlet and the inside of the roller kiln 1 is connected, the fan 2 air outlet through the adapter structure is communicated with multiple groups of heat exchanger 3, the side of the multiple groups of heat exchanger 3 is communicated with the first row pipe 4, the multiple first row pipe 4 is communicated with the same root collection main pipe 5, in the production process, the roller kiln 1 will produce tail gas (i.e.: 99% of nitrogen and a small amount of organic matter and other impurities), the tail gas through the fan 2 into the heat exchanger 3, through the setting of the heat exchanger 3 can ensure that the heat exchange is carried out at the same time to reduce the temperature of the tail gas, avoid the damage to the first row pipe 4 and the collection main pipe 5, the discharge end of the collection main pipe 5 is communicated with the water washing structure, one side of the water washing structure is communicated with the adsorption assembly, one side of the adsorption assembly is communicated with the first nitrogen storage tank 6, the first nitrogen storage tank 6 is communicated with the inside of the roller kiln 1 through the nitrogen exhaust pipe 7.

[0051] Further, as shown in Figure 1 and Figure 5 The adapter structure includes an outer protective shell 8 and a blade 9, the inside of the outer protective shell 8 is hollow and one end is open, the air outlet of the fan 2 is communicated with the open end of the outer protective shell 8, the blade 9 is rotatably connected inside the outer protective shell 8, a plurality of communication ports 10 are circumferentially and equidistantly formed on the blade 9, and a barrier portion 11 is arranged between adjacent two communication ports 10.

[0052] The side of the outer protective shell 8 away from the fan 2 is communicated with a plurality of adapter jacks 12, the adapter jacks 12 are communicated with the air outlet of the fan 2 through the communication ports 10.

[0053] Further, the number of adapter jacks 12 is twice the number of communication ports 10, and the number of heat exchangers 3 is the same as the number of adapter jacks 12, the adapter jacks 12 are communicated with the inlets of the heat exchangers 3 through flow pipes 13, and the two adapter jacks 12 adjacent to the air outlet of the fan 2 are in contact with the barrier portion 11, the barrier portion 11 plays a blocking role to prevent the tail gas from entering the adapter jacks 12.

[0054] A first guide groove 14 is formed on the outer wall of the outer protective shell 8, the first guide groove 14 is communicated with the outer wall of the blade 9, a push rod 15 is fixedly connected to the outer wall of the blade 9, and the free end of the push rod 15 extends out of the first guide groove 14, and the push rod 15 is guided and limited by the first guide groove 14.

[0055] The multiple groups of heat exchangers 3 are communicated with an external nitrogen supply system, the multiple groups of heat exchangers 3 are communicated with a second nitrogen storage tank 51 through pipelines, and the second nitrogen storage tank 51 is communicated with a nitrogen discharge pipe 52, high-purity nitrogen gas is sent to the heat exchangers 3 by the external nitrogen supply system to exchange heat with the tail gas, and the nitrogen gas after heat exchange is discharged into the second nitrogen storage tank 51 for storage.

[0056] Specifically, in use, the tail gas is transported into the outer protective shell 8 by the fan 2, flows into the heat exchanger 3 through the communication port 10, the adapter socket 12 and the flow pipeline 13 for heat exchange, when the heat exchanger 3 in the working state needs to be cleaned and maintained, only need to pull the pull rod 15, the pull rod 15 drives the blade 9 to rotate, after the rotation is completed, the adapter socket 12 in communication with the communication port 10 stops communicating with the communication port 10 and contacts the blocking part 11, at this time, the corresponding heat exchanger 3 is closed for maintenance and cleaning;

[0057] And the adapter socket 12 previously in contact with the blocking part 11 stops contacting the blocking part 11 after the blade 9 rotates and communicates with the communication port 10, at the same time, the corresponding heat exchanger 3 is opened, at this time, the tail gas is transported into the outer protective shell 8 by the fan 2, flows into the heat exchanger 3 through the communication port 10, the adapter socket 12 and the flow pipeline 13 for heat exchange, thereby ensuring that the whole production process can be smoothly carried out during the cleaning and maintenance process of the heat exchanger 3.

[0058] Further, as shown in Figure 3 and Figure 6 , the water washing structure includes a water washing sealed tank 16 and an exhaust pipe 17, the inner cavity bottom of the water washing sealed tank 16 is detachably installed with an air bag 18, the discharge end of the collection main pipe 5 penetrates the water washing sealed tank 16 and communicates with the air bag 18, as shown in Figure 2 , the pipe body of the collection main pipe 5 is communicated with a plurality of branch pipes 19 corresponding to the plurality of first exhaust pipes 4 one by one, the free end of the first exhaust pipe 4 is detachably inserted into the branch pipe 19, the pipe body of the plurality of branch pipes 19 is communicated with a first check valve 20, when the heat exchanger 3 is cleaned and maintained, the corresponding first exhaust pipe 4 is separated from the branch pipe 19, so that the staff can clean and maintain the heat exchanger 3, the first check valve 20 can prevent the tail gas from flowing back to the first exhaust pipe 4 from the branch pipe 19;

[0059] The exhaust pipe 17 is communicated at the top of the water washing sealed tank 16;

[0060] As shown in Figure 7 , the top of the air bag 18 is provided with a plurality of exhaust holes 21, the plurality of exhaust holes 21 can uniformly disperse the exhaust gas, increase the contact area of the exhaust gas and water, and improve the dissolution efficiency.

[0061] Further, as shown in Figure 6 , the inner wall of the water washing sealed tank 16 is further provided with a wire mesh demister 22, the outer surface of the water washing sealed tank 16 is fixedly connected with a plurality of fixed clamping sleeves 23, the plurality of fixed clamping sleeves 23 are sleeved with the same water suction pipe 24, the water inlet end of the water suction pipe 24 penetrates the water washing sealed tank 16 and extends into the inside of the water washing sealed tank 16, and the water inlet end of the water suction pipe 24 is located between the air bag 18 and the wire mesh demister 22.

[0062] The inside of the water washing sealed tank 16 is also provided with a shower head 25 located above the wire mesh demister 22. The top of the shower head 25 is connected with a water pump 26. The water outlet end of the water suction pipe 24 is connected with the water pump 26. The water pump 26 generates suction force on the water suction pipe 24, so that the water in the water washing sealed tank 16 flows into the water suction pipe 24 and is transported to the shower head 25 by the water pump 26. The water is sprayed out through the shower head 25 to flush the wire mesh demister 22, thereby preventing the wire mesh demister 22 from being blocked and ensuring that the water-washed tail gas can pass through unobstructed.

[0063] Further, as shown in Figure 3 , the water washing sealed tank 16 is also connected with a water drain faucet 27 and a water inlet faucet 28. The water inlet faucet 28 is connected with an external water source to facilitate water addition to the water washing sealed tank 16. The water drain faucet 27 is provided to facilitate later water drainage. A viewing window 29 is embedded on the tank body of the water washing sealed tank 16 to facilitate real-time observation of the inside of the water washing sealed tank 16 by the staff.

[0064] Before use, water is added to the water washing sealed tank 16 through the water inlet faucet 28 to control the water level between the air bag 18 and the wire mesh demister 22.

[0065] The heat-exchanged tail gas is transported to the air bag 18 through the collection main pipe 5 and is discharged through the exhaust hole 21, thereby dissolving the organic matter and water-soluble impurities in the tail gas in water to improve the purity of nitrogen. After the organic matter and water-soluble impurities are dissolved in water, due to the continuous friction between the tail gas and water, mist is generated and rises with the tail gas. The mist can be removed by the wire mesh demister 22.

[0066] Example Two

[0067] This example is improved on the basis of Example One: further, as shown in Figure 3 , the pipe body of the exhaust pipe 17 is connected with a condensation collector 30. The free end of the exhaust pipe 17 is connected with an air compressor 31. The tail gas after water washing is discharged into the air compressor 31 through the exhaust pipe 17. The air compressor 31 compresses the tail gas. The condensation collector 30 is provided to condense and collect the water vapor in the exhaust pipe 17, preventing the water vapor from condensing into small water droplets and flowing into the air compressor 31, thereby damaging the air compressor 31. The air outlet end of the air compressor 31 is connected with a direction adjusting structure.

[0068] As shown in Figures 8-10 , the direction adjusting structure includes a gas guide plate 32. The inside of the gas guide plate 32 is provided with an air inlet cavity 33 and two air outlet cavities 34. A gas guide disc 35 is rotatably connected in the inside of the gas guide plate 32. The outer surface of the gas guide disc 35 is in contact with the air inlet cavity 33 and the two air outlet cavities 34.

[0069] As Figure 11 shown, the inside of the air guide disc 35 is provided with a flow guide through hole 36, and the two ends of the flow guide through hole 36 are respectively connected with the air inlet cavity 33 and one of the air outlet cavities 34;

[0070] The air outlet end of the air compressor 31 is connected with the air inlet cavity 33, and the flow guide through hole 36 can ensure that the tail gas entering the air inlet cavity 33 is only discharged from one of the air outlet cavities 34, and the other air outlet cavity 34 is blocked under the action of the air guide disc 35.

[0071] Further, one side of the air guide disc 35 is fixedly connected with a rotating shaft 49, the free end of the rotating shaft 49 penetrates the air guide plate 32 and extends outward, the shaft body of the rotating shaft 49 is fixedly sleeved with a rotating ring 50, and two prompt rods 45 are arranged on the rotating ring 50, as Figures 9-11 shown, the two prompt rods 45 correspond to the through hole path of the flow guide through hole 36, and the positions of the two prompt rods 45 can be used by the staff to understand the positions of the two ends of the flow guide through hole 36, and further understand the connection between the flow guide through hole 36, the air inlet cavity 33 and the two air outlet cavities 34;

[0072] When it is necessary to switch the flow direction of the flow guide through hole 36, the rotating ring 50 is rotated, the rotating ring 50 drives the air guide disc 35 to rotate through the rotating shaft 49, and then the two ends of the flow guide through hole 36 are connected with the air inlet cavity 33 and the other air outlet cavity 34, respectively, and the air outlet cavity 34 originally connected with the flow guide through hole 36 is blocked by the air guide disc 35;

[0073] As Figure 8 shown, the adsorption assembly includes a support rack 37 and two groups of adsorption towers 38, the two groups of adsorption towers 38 are installed on one side of the support rack 37 in an up-down manner, and an activated carbon plate (not shown in the figure) is inserted into the inside of the adsorption tower 38;

[0074] The first air outlet pipeline 39 is arranged in each of the two air outlet cavities 34, and the air outlet cavity 34 is connected with the inside of the adsorption tower 38 through the first air outlet pipeline 39;

[0075] Specifically, the air compressor 31 sends the compressed tail gas to the air inlet cavity 33, the tail gas passes through the flow guide through hole 36, one of the air outlet cavities 34 and the first air outlet pipeline 39 inserted in the air outlet cavity 34 in sequence, and the tail gas is discharged to the adsorption tower 38 through the first air outlet pipeline 39, and the impurities in the tail gas are secondarily adsorbed by the activated carbon plate, so as to further improve the purity of nitrogen;

[0076] The two groups of adsorption towers 38 are provided with a separate exhaust pipe 40 on one side, and the free end of the two exhaust pipes 40 is communicated with a third one-way valve 48, one of the exhaust pipes 40 is detachably communicated with a vacuum pump 41 through the third one-way valve 48, and the vacuum pump 41 is used to remove the air in the adsorption tower 38 before use, so as to avoid the secondary pollution of impurities in the air to the tail gas, and the top of the two groups of adsorption towers 38 is provided with a pressure gauge 42, so that the staff can know whether the internal pressure of the adsorption tower 38 is normal.

[0077] Further, one side of the first nitrogen storage tank 6 is communicated with a second one-way valve 43, and one side of the two groups of adsorption towers 38 is communicated with a second exhaust pipe 44, and the free end of one of the second exhaust pipes 44 is detachably inserted into the second one-way valve 43.

[0078] Further, the top of the first nitrogen storage tank 6 is respectively communicated with a nitrogen input pump 46 and an oxygen concentration detector 47, the oxygen concentration detector 47 and the nitrogen input pump 46 are electrically connected, and the nitrogen input pump 46 is communicated with a nitrogen exhaust pipe 52.

[0079] Specifically, when the adsorption tower 38 is used, the second exhaust pipe 44 is inserted into the second one-way valve 43, so that the tail gas in the adsorption tower 38 flows into the first nitrogen storage tank 6 through the second one-way valve 43 for storage, and the oxygen content in the first nitrogen storage tank 6 can be detected by the oxygen concentration detector 47, when the oxygen concentration is higher than the emission standard, the nitrogen input pump 46 will supplement the high-purity nitrogen in the second nitrogen storage tank 51 to the first nitrogen storage tank 6 through the nitrogen exhaust pipe 52, so as to dilute the oxygen concentration, when the oxygen concentration is lower than the emission standard, the nitrogen input pump 46 stops supplementing, and at the same time, the first nitrogen storage tank 6 supplements nitrogen to the inside of the roller kiln 1 through the nitrogen exhaust pipe 7.

[0080] When the adsorption tower 38 needs to be cleaned and maintained, the rotating ring 50 is rotated, the rotating ring 50 drives the gas guide disc 35 to rotate through the rotating shaft 49, so that the two ends of the flow guide hole 36 are respectively communicated with the air inlet cavity 33 and the other air outlet cavity 34, and the air outlet cavity 34 originally communicated with the flow guide hole 36 is blocked by the gas guide disc 35, so that the production process can be smoothly carried out during the cleaning and maintenance of the adsorption tower 38.

[0081] In summary, the working process of the utility model is as follows:

[0082] The tail gas is transported into the outer protective shell 8 by the fan 2, and is flowed into the heat exchanger 3 through the communication port 10, the adapter socket 12 and the flow pipe 13 for heat exchange.

[0083] Water is added to the water washing sealed tank 16 through the water inlet faucet 28, and the water level is controlled between the air bag 18 and the wire mesh demister 22.

[0084] The heat-exchanged tail gas is transported to the air bag 18 through the collection main pipe 5 and is discharged through the exhaust hole 21, so that the organic matter and water-soluble impurities in the tail gas are dissolved in water, improving the purity of nitrogen. After the organic matter and water-soluble impurities are dissolved in water, due to the continuous friction between the tail gas and water, mist is generated and rises with the tail gas. The mist is removed by the wire mesh demister 22. The suction pump 26 generates suction force on the water suction pipe 24, so that the water in the water washing sealed tank 16 flows into the water suction pipe 24 and is transported to the spray head 25 by the suction pump 26. The water is sprayed out through the spray head 25 to flush the wire mesh demister 22, thereby preventing the wire mesh demister 22 from being blocked and ensuring that the washed tail gas can pass through unobstructed.

[0085] After the water washing is completed, the tail gas is discharged into the air compressor 31 through the exhaust pipe 17. The air compressor 31 compresses the tail gas. The water vapor in the exhaust pipe 17 is condensed and collected by the condenser collector 30, preventing the water vapor from condensing into small water droplets and flowing into the air compressor 31, thereby damaging the air compressor 31. The compressed tail gas is transported to the air inlet cavity 33 by the air compressor 31. The tail gas passes through the flow guide through hole 36, one of the exhaust cavities 34, and the first exhaust pipe 39 inserted in the exhaust cavity 34 in sequence. The tail gas is discharged into the adsorption tower 38 through the first exhaust pipe 39. The impurities in the tail gas are adsorbed by the activated carbon plate for the second time, further improving the purity of nitrogen. The tail gas in the adsorption tower 38 flows into the first nitrogen storage tank 6 through the second one-way valve 43 for storage. The oxygen content in the first nitrogen storage tank 6 is detected by the oxygen concentration detector 47. When the oxygen concentration is higher than the emission standard, the nitrogen input pump 46 supplements the high-purity nitrogen in the second nitrogen storage tank 51 to the first nitrogen storage tank 6 through the nitrogen discharge pipe 52, thereby diluting the oxygen concentration. When the oxygen concentration is lower than the emission standard, the nitrogen input pump 46 stops supplementing, and the first nitrogen storage tank 6 supplements nitrogen to the inside of the roller kiln 1 through the nitrogen discharge pipe 7.

[0086] When the heat exchanger 3 in the working state needs to be cleaned and maintained, the lever 15 is only needed to be pulled, and the lever 15 drives the blade 9 to rotate. After the rotation is completed, the adapter socket 12 connected to the communication port 10 stops communicating with the communication port 10 and contacts the blocking part 11. At this time, the corresponding heat exchanger 3 is closed for maintenance and cleaning.

[0087] The adapter socket 12 previously in contact with the partition 11 stops contacting the partition 11 after the blade 9 rotates, and communicates with the communicating port 10, and simultaneously opens the corresponding heat exchanger 3, at this time, the tail gas is transported into the outer protective shell 8 by the fan 2, and flows into the heat exchanger 3 through the communicating port 10, the adapter socket 12 and the flow channel 13 to exchange heat, thereby ensuring that the entire production process can still proceed smoothly during the cleaning and maintenance of the heat exchanger 3.

[0088] Further, when the adsorption tower 38 needs to be cleaned and maintained, the rotating ring 50 is rotated, the rotating ring 50 drives the gas guide disc 35 to rotate through the rotating shaft 49, and then the two ends of the flow guide hole 36 are respectively communicated with the gas inlet cavity 33 and another gas outlet cavity 34, and the gas outlet cavity 34 originally communicated with the flow guide hole 36 is blocked by the gas guide disc 35, that is, the entire production process can still proceed smoothly during the cleaning and maintenance of the adsorption tower 38.

[0089] However, the working principles and wiring methods of the roller kiln 1, the heat exchanger 3, the first one-way valve 20, the wire mesh demister 22, the pump 26, the condensate collector 30, the vacuum pump 41, the air pressure gauge 42, the second one-way valve 43, the nitrogen input pump 46, the oxygen concentration detector 47 and the third one-way valve 48 are common, which belong to conventional means or common knowledge, and will not be described here again. The person skilled in the art can make any selection or arrangement according to the needs or convenience.

[0090] The different embodiments described above can be combined, replaced, and used in combination.

[0091] It should be noted that in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0092] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A nitrogen atmosphere purifying device for a roller kiln, characterized by: The utility model provides a kind of roll kiln and fan, the fan is installed in one side of roll kiln, the air inlet of the fan is connected with the inside of roll kiln, the air outlet of the fan is connected with multiple groups of heat exchanger by adapter structure, the one side of multiple groups of heat exchanger is connected with first row pipe, multiple first row pipes are connected with same root collection main pipe, the discharge end of collection main pipe is connected with water washing structure, the one side of water washing structure is connected with adsorption assembly, the one side of adsorption assembly is connected with first nitrogen storage tank, first nitrogen storage tank is connected with the inside of roll kiln by nitrogen exhaust pipe.

2. The roller hearth kiln nitrogen atmosphere purifier of claim 1, wherein: The adapter structure includes outer protective shell and vane, the inside of outer protective shell is hollow and one end is open, the air outlet of fan is connected with the open end of outer protective shell, the vane is rotatably connected in the inside of outer protective shell, multiple communication ports are opened on the vane in circumferential equidistant manner, and a barrier portion is arranged between adjacent two communication ports. The one side of outer protective shell away from fan is connected with multiple adapter jacks, the adapter jack is connected with the air outlet of fan through communication port.

3. The roller hearth kiln nitrogen atmosphere purifier of claim 2, wherein: The number of adapter jack is twice the number of communication port, and the number of heat exchanger is same with the number of adapter jack, the adapter jack is connected with the inlet of heat exchanger through flow channel, and the adapter jack adjacent to the air outlet of fan is in contact with barrier portion. First guide slot is opened on the outer wall of outer protective shell, the first guide slot is connected with the outer wall of vane, the outer wall of vane is fixedly connected with lever, and the free end of lever extends out of first guide slot. Multiple heat exchangers are connected with external nitrogen supply system, and multiple heat exchangers are connected with second nitrogen storage tank through pipeline, and nitrogen discharge pipe is connected with second nitrogen storage tank.

4. The roller kiln nitrogen atmosphere purifier of claim 3, wherein: The water washing structure includes water washing sealed tank and exhaust pipe, the inner chamber bottom of water washing sealed tank is detachably installed with air bag, the discharge end of collection main pipe penetrates water washing sealed tank and is connected with air bag, the pipe body of collection main pipe is connected with branch pipe corresponding to multiple first row pipes, the free end of first row pipe is detachably inserted in branch pipe, and the pipe body of multiple branch pipes is connected with first check valve. The exhaust pipe is connected at the top of water washing sealed tank. The top of air bag is provided with a plurality of exhaust holes.

5. The roll kiln nitrogen atmosphere purifier apparatus of claim 4, wherein: The inner wall of the water washing sealed tank (16) is further provided with a wire mesh demister (22), the outer surface of the water washing sealed tank (16) is fixedly connected with a plurality of fixed sleeves (23), the same water suction pipe (24) is sleeved with the plurality of fixed sleeves (23), the water inlet end of the water suction pipe (24) penetrates through the water washing sealed tank (16) and extends to the inside of the water washing sealed tank (16), and the water inlet end of the water suction pipe (24) is located between the air bag (18) and the wire mesh demister (22); The inside of the water washing sealed tank (16) is further provided with a shower head (25), the shower head (25) is located above the wire mesh demister (22), the top of the shower head (25) is communicated with a suction pump (26), and the water outlet end of the water suction pipe (24) is communicated with the suction pump (26).

6. The roll kiln nitrogen atmosphere purifier apparatus of claim 5, wherein: The water washing sealed tank (16) is further communicated with a drain faucet (27) and a water inlet faucet (28), the water inlet faucet (28) is communicated with an external water source, and a visual window (29) is embedded on the tank body of the water washing sealed tank (16).

7. The roll kiln nitrogen atmosphere purifier apparatus of claim 6, wherein: The pipe body of the exhaust pipe (17) is communicated with a condensation collector (30), the free end of the exhaust pipe (17) is communicated with an air compressor (31), and the air outlet end of the air compressor (31) is communicated with a direction adjusting structure; The direction adjusting structure comprises a gas guide plate (32), the inside of the gas guide plate (32) is provided with an air inlet cavity (33) and two air outlet cavities (34), the inside of the gas guide plate (32) is rotatably connected with a gas guide disc (35), and the outer surface of the gas guide disc (35) is in contact with the air inlet cavity (33) and the two air outlet cavities (34); The inside of the gas guide disc (35) is provided with a flow guide through hole (36), and the two ends of the flow guide through hole (36) are respectively communicated with the air inlet cavity (33) and one of the air outlet cavities (34); The air outlet end of the air compressor (31) is communicated with the air inlet cavity (33).

8. The roll kiln nitrogen atmosphere purifier apparatus of claim 7, wherein: One side of the gas guide disc (35) is fixedly connected with a rotating shaft (49), the free end of the rotating shaft (49) penetrates through the gas guide plate (32) and extends outward, the shaft body of the rotating shaft (49) is fixedly sleeved with a rotating ring (50), two prompt rods (45) are arranged on the rotating ring (50), and the two prompt rods (45) correspond to the through hole path of the flow guide through hole (36); The adsorption assembly comprises a support rack (37) and two groups of adsorption towers (38), the two groups of adsorption towers (38) are installed on one side of the support rack (37) in an up-down mode, and an activated carbon plate is inserted into the inside of the adsorption tower (38); First air outlet pipelines (39) are arranged in the two air outlet cavities (34), and the air outlet cavities (34) are communicated with the inside of the adsorption tower (38) through the first air outlet pipelines (39); One side of the two groups of adsorption towers (38) is provided with a separate pipe (40), the free ends of the two separate pipes (40) are communicated with third one-way valves (48), one of the separate pipes (40) is detachably communicated with a vacuum pump (41) through the third one-way valve (48), and the top of the two groups of adsorption towers (38) is provided with an air pressure gauge (42).

9. The roller hearth kiln nitrogen atmosphere purifier apparatus of claim 8, wherein: One side of the first nitrogen storage tank (6) is communicated with a second one-way valve (43), two groups of the adsorption towers (38) are communicated with second exhaust pipes (44) on one side, and the free end of one of the second exhaust pipes (44) is detachably inserted on the second one-way valve (43).

10. The roller hearth kiln nitrogen atmosphere purifier apparatus of claim 9, wherein: The top of the first nitrogen storage tank (6) is respectively communicated with a nitrogen input pump (46) and an oxygen concentration detector (47), the oxygen concentration detector (47) and the nitrogen input pump (46) are electrically connected, and the nitrogen input pump (46) is communicated with a nitrogen exhaust pipe (52).

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