Nitrogen recycling equipment for nitrogen grain storage

Abstract

The utility model relates to the technical field of nitrogen grain storage, in particular to nitrogen recycling equipment for nitrogen grain storage, which comprises a container, an air compressor, an air freezing dryer, filtering equipment, a pressure swing adsorption AB tower, a nitrogen freezing dryer, circulation equipment and an air buffer tank are fixedly mounted in the container, and a partition plate is fixed in the middle of the air buffer tank. An air inlet pipe is fixedly communicated with the outer side of the air buffer tank, and a purification mechanism is arranged between the partition plate and the inner bottom of the air buffer tank. According to the nitrogen-rich waste gas recycling device, the recycling pipe is fixedly communicated between the air compressor and the circulation equipment, and the nitrogen-rich waste gas in the granary is conveyed into the air compressor through the recycling pipe to serve as an air raw material for subsequently manufacturing nitrogen, so that the recycling of the nitrogen-rich waste gas is facilitated; the conveying net belt is in transmission connection with the interior of the air buffer tank through the transmission rollers and the limiting rollers, and dust and impurities in the air can be conveniently filtered out through a sponge body on the conveying net belt.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen grain storage, in particular to nitrogen recycling equipment for nitrogen grain storage. Background Art

[0002] Nitrogen is a gas with very stable chemical properties. It will not react with the components in grain, thus ensuring the chemical stability of grain. The introduction of nitrogen into the granary can also reduce the oxygen content in the storage environment, thereby inhibiting the oxidation reaction of grain and inhibiting or killing pests and mold in grain. Therefore, in the process of grain storage in the granary, relevant equipment is generally used to produce nitrogen and introduce it into the granary.

[0003] The above equipment mainly includes air compressor, air buffer tank, air dryer, pressure swing adsorption AB tower, nitrogen dryer, etc. During operation, the air compressor pumps air through the buffer tank to the pressure swing adsorption AB tower. The pressure swing adsorption AB tower uses the carbon molecular sieve in the tower to pressure swing adsorb oxygen to produce nitrogen. The nitrogen is then dried by the nitrogen dryer and transported to the warehouse, realizing the use of nitrogen for material storage.

[0004] Currently, most of the grain storage nitrogen filling processes on the market increase the nitrogen concentration in the granary through replacement. Specifically, the nitrogen produced by the equipment is transported into the granary through a pipe, and then the nitrogen-containing waste gas inside the granary is pumped out through another pipe. This will cause the nitrogen-rich waste gas to be discharged to the outdoors, causing waste, which is not conducive to the recovery and recycling of the nitrogen-rich waste gas. In addition, the air buffer tank has a single function and cannot combine its own buffering characteristics to purify the air delivered by the air compressor. Air containing a large amount of dust, impurities and bacteria will affect the subsequent production of clean nitrogen. Utility Model Content

[0005] The purpose of the utility model is to provide a nitrogen recycling device for nitrogen grain storage to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A nitrogen recycling device for nitrogen grain storage includes a container, wherein an air compressor, an air dryer, a filtering device, a pressure swing adsorption AB tower, a nitrogen dryer, and a circulation device are fixedly installed inside the container, characterized in that a nitrogen discharge pipe, an exhaust gas recovery pipe, and a recycling pipe are fixedly connected to the outside of the circulation device. The nitrogen recycling device for nitrogen grain storage further includes:

[0008] An air buffer tank is fixed inside the container and is used to buffer the air pumped by the air compressor. A partition is fixed in the middle of the air buffer tank, and an air inlet pipe is fixed to the outside of the air buffer tank;

[0009] The purification mechanism is arranged between the partition and the bottom of the air buffer tank. The purification mechanism includes two transmission rollers and two limiting rollers. A conveyor mesh belt is driven between the plurality of transmission rollers and the limiting rollers. A sponge body capable of filtering air dust and impurities is fixed on the outside of the conveyor mesh belt;

[0010] The cleaning mechanism is arranged between the air intake pipe and the purification mechanism, and can automatically clean the dirty sponge with the help of airflow thrust;

[0011] The pressure stabilizing mechanism is fixed on the top of the air buffer tank, which can maintain the internal air pressure of the air buffer tank and provide air for sterilization.

[0012] Furthermore, the nitrogen discharge pipe and the waste gas recovery pipe are both connected and installed with the granary, and the recycling pipe is connected and fixed between the air compressor and the circulation equipment.

[0013] Furthermore, the bottom of the air buffer tank is connected and fixed with a three-way pipe, and the top of the air buffer tank is connected and fixed with an air outlet pipe.

[0014] Furthermore, the partition is rotatably connected to the transmission roller and the limiting roller at the corresponding position, the transmission roller away from the partition position is rotatably connected to the bottom of the air buffer tank, and a motor that can drive the transmission roller at the corresponding position to rotate is fixed on the outside of the air buffer tank.

[0015] Further, the cleaning mechanism includes:

[0016] A column, fixed to the inner bottom of the air buffer tank;

[0017] The shaft is rotatably connected between the column and the air buffer tank. One end of the shaft extending to the air inlet pipe is fixed with a plurality of fan blades, and the other end of the shaft is fixed with a brush.

[0018] Furthermore, the voltage stabilizing mechanism includes:

[0019] A circular plate is fixed to the top of the air buffer tank, and a sleeve is fixed to the top surface of the circular plate;

[0020] The piston is slidably connected to the sleeve, and a pressure-stabilizing spring is fixed between the piston and the sleeve.

[0021] Furthermore, a plurality of circular holes are uniformly opened on the outer side of the sleeve, and a plurality of ultraviolet germicidal lamps are uniformly installed and fixed on the bottom surface of the circular plate.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. By connecting a recycling pipe between the air compressor and the circulation equipment, the nitrogen-rich waste gas inside the granary is transported to the inside of the circulation equipment through the waste gas recovery pipe pump, and then the waste gas is transported from the recycling pipe to the air inlet end of the air compressor through the circulation equipment. The air compressor can not only compress and suck the outside air, but also pump the waste gas back to the air buffer tank to prepare nitrogen for the pressure swing adsorption AB tower, preventing the nitrogen-rich waste gas from being discharged to the outside and causing waste, which is conducive to the recovery and recycling of the nitrogen-rich waste gas.

[0024] 2. A transmission roller and a limit roller are rotated inside the air buffer tank, and a conveyor mesh belt is connected between the transmission roller and the limit roller. A sponge is fixed on the outside of the conveyor mesh belt. The sponge driven by the conveyor mesh belt at the internal position of the partition can filter the air entering the air buffer tank. Water is transported to the bottom of the air buffer tank through a pipe opening of the three-way pipe. The bottom of the conveyor mesh belt is immersed in water to make the sponge moist. The moist sponge further improves the effect of adsorbing dust and impurities in the air, which is beneficial to improving the air purification effect inside the buffer tank and facilitating the transportation of clean air raw materials to the pressure swing adsorption AB tower position to prepare nitrogen.

[0025] 3. A column is fixed on the inner bottom of the air buffer tank, and a shaft is rotated on the top of the column. The shaft extends to one end of the air inlet pipe and is fixed with multiple blades. When the air compressor conveys air into the air buffer tank through the air inlet pipe, the airflow drives the multiple blades to rotate, causing the shaft to rotate with multiple brushes. The brushes rotate on the sponge on the outside of the conveyor belt to clean the sponge. At the same time, the brushes can cooperate with water to clean the sponge, which improves the cleaning effect of the sponge to a certain extent, making it convenient for the cleaned sponge to be circulated to the partition position to purify the air. A water outlet pipe and a water inlet pipe are connected to the three-way pipe at the bottom of the air compression tank to facilitate the replacement of water inside the air buffer tank and discharge the dirty water that cleans the sponge. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 This is a schematic diagram of the internal structure of the container in the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the air buffer tank in the utility model;

[0029] Figure 4 This is a schematic diagram of the internal structure of the air buffer tank in the utility model;

[0030] Figure 5 This is a schematic diagram of the purification mechanism structure in the utility model;

[0031] Figure 6This is a schematic diagram of the structure of the voltage stabilizing mechanism in the utility model;

[0032] Figure 7 This is a simplified flow chart of nitrogen recycling in the utility model.

[0033] Figure 100, container; 110, air compressor; 120, air dryer; 130, filtration equipment; 140, pressure swing adsorption AB tower; 150, nitrogen dryer; 160, circulation equipment; 161, nitrogen discharge pipe; 162, waste gas recovery pipe; 163, recycling pipe; 200, air buffer tank; 210, partition; 220, air inlet pipe; 230, tee pipe; 240, air outlet Tube; 250, motor; 300, purification mechanism; 310, transmission roller; 320, limiting roller; 330, conveyor belt; 331, sponge; 400, cleaning mechanism; 410, column; 420, shaft; 421, fan blade; 422, brush; 500, pressure-stabilizing mechanism; 510, circular plate; 511, sleeve; 512, ultraviolet germicidal lamp; 520, piston; 521, pressure-stabilizing spring. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] For example 1, please refer to Figure 1 - Figure 7In an embodiment of the present invention, a nitrogen recycling device for nitrogen storage grain includes a container 100, an air compressor 110, an air dryer 120, a filter 130, a pressure swing adsorption AB tower 140, a nitrogen dryer 150 and a circulation device 160 are fixedly installed inside the container 100, and a nitrogen discharge pipe 161, an exhaust gas recovery pipe 162 and a recycling pipe 163 are fixedly connected to the outside of the circulation device 160. The nitrogen recycling device for nitrogen storage grain also includes an air buffer tank 200 fixedly installed inside the container 100, a partition 210 is fixed in the middle of the air buffer tank 200, and the air buffer tank 200 has a An air inlet pipe 220 is fixed to the outside, and a purification mechanism 300 is arranged between the partition 210 and the bottom of the air buffer tank 200. The purification mechanism 300 includes two transmission rollers 310 and two limiting rollers 320. A conveying mesh belt 330 is transmitted between the multiple transmission rollers 310 and the limiting rollers 320. A sponge 331 capable of filtering air dust and impurities is fixed on the outside of the conveying mesh belt 330. A cleaning mechanism 400 is arranged between the air inlet pipe 220 and the purification mechanism 300. A pressure stabilizing mechanism 500 is fixed to the inner top of the air buffer tank 200. The pressure stabilizing mechanism 500 can maintain the internal air pressure of the air buffer tank 200 and can provide air for sterilization.

[0036] Specifically, a recycling pipe 163 is fixed between the air compressor 110 and the circulation device 160 in the prior art, and the waste gas rich in nitrogen in the granary is transported to the inside of the circulation device 160 through the waste gas recovery pipe 162, and then transported to the inside of the air compressor 110 through the recycling pipe 163 as an air raw material for subsequent nitrogen production, which is conducive to the recycling and reuse of the waste gas rich in nitrogen. The transmission roller 310 and the limit roller 320 are used to drive the conveyor belt 330 connected to the air buffer tank 200, and the air buffer tank 200 is connected to the air buffer tank 200. 00 passes through the sponge 331 on the conveyor mesh belt 330 during the process of flowing from bottom to top, so as to filter out the dust and impurities in the air. The airflow flowing inside the air inlet pipe 220 of the air buffer tank 200 drives the multiple fan blades 421 to rotate, and the fan blades 421 drive the shaft 420 to rotate to rotate the brush 422 to clean the sponge 331, so that the clean sponge 331 is circulated and transmitted to the partition 210 position for reuse, so that the air buffer tank 200 can not only buffer and store air but also automatically purify and process air.

[0037] like Figure 2 and Figure 7As shown, in this embodiment, the nitrogen exhaust pipe 161 and the waste gas recovery pipe 162 are both installed in communication with the granary, and the recycling pipe 163 is connected and fixed between the air compressor 110 and the circulation equipment 160. The circulation equipment 160 transports the produced nitrogen into the granary through the waste gas recovery pipe 162. The nitrogen-rich waste gas in the granary is transported to the circulation equipment 160 through the waste gas recovery pipe 162, and then transported from the circulation equipment 160 to the position of the air compressor 110 for re-compression as an air raw material for producing nitrogen.

[0038] like Figure 2 and Figure 7 As shown, in this embodiment, the air compressor 110 compresses the sucked air and transmits it to the air buffer tank 200 through a pipeline. The air inside the air buffer tank 200 is transmitted from the outlet pipe 240 through a pipeline to the air dryer 120. The air after the cold drying process is transmitted from the air dryer 120 through a pipeline to the filter device 130 for multi-stage filtration. The filtered air is then transmitted through a pipeline to the pressure swing adsorption AB tower 140 to prepare nitrogen. The prepared nitrogen is transmitted through a pipeline to the nitrogen dryer 150. Finally, it is transmitted from the nitrogen dryer 150 through a pipeline to the circulation device 160 for use. This part is the existing technology, and the specific working principles of different devices are not described in detail.

[0039] like Figure 1 As shown, in this embodiment, the nitrogen recycling equipment can be installed as a whole in the container 100, and the container 100 is installed on an external machine carrier, which makes it convenient to move the nitrogen recycling equipment to the granary location where nitrogen needs to be replenished. The outside of the container 100 is opened and closed by a hydraulic rod with a door panel 1. Opening the door panel 1 facilitates the air compressor 110 to draw in external air. One end of the container 100 is hinged with a door panel 2. Opening the door panel 2 facilitates the operation and maintenance of mechanical equipment at different locations.

[0040] like Figure 4 and Figure 5 As shown, in this embodiment, the partition 210 is rotatably connected to the transmission roller 310 and the limiting roller 320 at the corresponding position, the transmission roller 310 away from the partition 210 is rotatably connected to the bottom of the air buffer tank 200, and a motor 250 that can drive the transmission roller 310 at the corresponding position to rotate is fixed to the outside of the air buffer tank 200.

[0041] In this embodiment, a rectangular through hole is opened in the middle of the partition 210, which is used to accommodate the position of the conveyor mesh belt 330 to filter the air. The output end of the motor 250 rotates one of the transmission rollers 310, so that the conveyor mesh belt 330 is transmitted between multiple transmission rollers 310 and the limiting roller 320, which facilitates the conveyor mesh belt 330 to transfer the sponge body 331 to the cleaning mechanism 400 position for cleaning, and then transfer the cleaned sponge body 331 to the partition 210 position to continue filtering dust in the air.

[0042] like Figure 4 and Figure 5 As shown, in this embodiment, the cleaning mechanism 400 includes a column 410 fixed to the bottom of the air buffer tank 200, and an axis 420 rotates between the column 410 and the air buffer tank 200. The axis 420 extends to one end of the air inlet pipe 220 and is fixed with multiple fan blades 421, and the other end of the axis 420 is fixed with a brush 422.

[0043] In this embodiment, the air flow passing through the air intake pipe 220 drives the fan blades 421 to rotate, the fan blades 421 drive the shaft 420 to rotate, and the shaft 420 drives the brush 422 abutting against the sponge body 331 to rotate and clean the sponge body 331, and an appropriate amount of water is injected into the inner bottom of the air buffer tank 200 to improve the cleaning effect of the sponge body 331.

[0044] like Figure 4 As shown, in this embodiment, in order to inject an appropriate amount of water into the air buffer tank 200, facilitate cleaning of the sponge 331, and make the sponge 331 moistened with water to improve the dust absorption effect, a three-way pipe 230 is fixed to the bottom of the air buffer tank 200, and the two pipe openings at the bottom of the three-way pipe 230 are respectively connected to a water inlet pipe and a drain pipe. The water inlet pipe and the drain pipe cooperate to transport water to replace the water at the bottom of the air buffer tank 200.

[0045] Embodiment 2, based on embodiment 1, in order to sterilize the air inside the air buffer tank 200, the high pressure characteristic of the air buffer tank 200 is utilized to discharge the water inside the air buffer tank 200.

[0046] like Figure 4 and Figure 6 As shown, in this embodiment, the pressure stabilizing mechanism 500 includes a circular plate 510 fixed to the top of the air buffer tank 200, and a sleeve 511 is fixed to the top surface of the circular plate 510. A piston 520 slides inside the sleeve 511, and a pressure stabilizing spring 521 is fixed between the piston 520 and the top surface of the sleeve 511. A plurality of circular holes are evenly penetrated on the outside of the sleeve 511, and a plurality of ultraviolet sterilization lamps 512 are evenly installed and fixed on the bottom surface of the circular plate 510.

[0047] Specifically, when the air pressure inside the air buffer tank 200 is relatively high, the air pressure pushes the piston 520 to move upward along the sleeve 511, so that the air is discharged from the circular hole of the sleeve 511 to the top of the air buffer tank 200, and then discharged into the air dryer 120 through the air outlet pipe 240. When the air pressure inside the air buffer tank 200 decreases, the elastic force of the pressure-stabilizing spring 521 causes the upward piston 520 to move down to below the circular hole, so that the air buffer tank 200 continues to store and accumulate air. When the water inside the air buffer tank 200 needs to be discharged, the valve at the water outlet end of the tee pipe 230 is opened. With the help of the air pressure inside the air buffer tank 200, the water can be automatically discharged through the tee pipe 230. At the same time, a plurality of ultraviolet sterilization lamps 512 are installed on the bottom surface of the circular plate 510 of the pressure-stabilizing mechanism 500. The ultraviolet sterilization lamps 512 can sterilize the stored air.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0049] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A nitrogen recycling device for nitrogen grain storage, comprising a container (100), wherein an air compressor (110), an air refrigeration dryer (120), a filtering device (130), a pressure swing adsorption AB tower (140), a nitrogen refrigeration dryer (150) and a circulation device (160) are fixedly installed inside the container (100), characterized in that: The outer side of the circulation device (160) is connected and fixed with a nitrogen discharge pipe (161), an exhaust gas recovery pipe (162) and a recycling pipe (163). The nitrogen recycling device for nitrogen grain storage also includes: An air buffer tank (200) is fixed inside the container (100) and is used to buffer the air pumped by the air compressor. A partition (210) is fixed in the middle of the air buffer tank (200), and an air inlet pipe (220) is fixed and connected to the outside of the air buffer tank (200); The purification mechanism (300) is arranged between the partition (210) and the inner bottom of the air buffer tank (200). The purification mechanism (300) includes two transmission rollers (310) and two limiting rollers (320). A conveying mesh belt (330) is transmitted between the plurality of transmission rollers (310) and the limiting rollers (320). A sponge (331) capable of filtering air dust and impurities is fixed on the outer side of the conveying mesh belt (330). The cleaning mechanism (400) is arranged between the air inlet pipe (220) and the purification mechanism (300) and can automatically clean the dirty sponge (331) by means of airflow thrust; The pressure stabilizing mechanism (500) is fixed to the top of the air buffer tank (200), can maintain the internal air pressure of the air buffer tank (200), and can provide air for sterilization.

2. The nitrogen recycling equipment for nitrogen storage grain according to claim 1, characterized in that: The nitrogen discharge pipe (161) and the waste gas recovery pipe (162) are both connected and installed with the granary, and the recycling pipe (163) is connected and fixed between the air compressor (110) and the circulation equipment (160).

3. The nitrogen recycling equipment for nitrogen storage of grain according to claim 1, characterized in that: The bottom of the air buffer tank (200) is connected to and fixed with a three-way pipe (230), and the top of the air buffer tank (200) is connected to and fixed with an air outlet pipe (240).

4. The nitrogen recycling equipment for nitrogen grain storage according to claim 1, characterized in that: The partition (210) is rotatably connected to a transmission roller (310) and a limiting roller (320) at a corresponding position; the transmission roller (310) at a position away from the partition (210) is rotatably connected to the inner bottom of the air buffer tank (200); and a motor (250) capable of driving the transmission roller (310) at the corresponding position to rotate is fixed to the outside of the air buffer tank (200).

5. The nitrogen recycling equipment for nitrogen storage of grain according to claim 1, characterized in that: The cleaning mechanism (400) comprises: A column (410) is fixed to the inner bottom of the air buffer tank (200); The shaft (420) is rotatably connected between the column (410) and the air buffer tank (200). One end of the shaft (420) extending to the air inlet pipe (220) is fixed with a plurality of fan blades (421), and the other end of the shaft (420) is fixed with a brush (422).

6. The nitrogen recycling equipment for nitrogen storage of grain according to claim 1, characterized in that: The voltage stabilizing mechanism (500) comprises: A circular plate (510) is fixed to the top of the air buffer tank (200), and a sleeve (511) is fixed to the top surface of the circular plate (510); The piston (520) is slidably connected to the sleeve (511), and a pressure stabilizing spring (521) is fixed between the piston (520) and the sleeve (511).

7. The nitrogen recycling equipment for nitrogen grain storage according to claim 6, characterized in that: A plurality of circular holes are uniformly opened on the outer side of the sleeve (511), and a plurality of ultraviolet sterilization lamps (512) are uniformly installed and fixed on the bottom surface of the circular plate (510).

Images