A cold adsorption device for pretreatment of nitrogen and oxygen

Abstract

The present invention relates to the technical field of nitrogen and oxygen production, and specifically to a cold adsorption device for pre-treatment of nitrogen and oxygen, comprising a treatment kettle, on which are provided: an air inlet pipe, whose axis is tangent to the inner wall of the treatment kettle; an adsorption assembly, which comprises a plurality of movable bars movably arranged on the inner wall of the treatment kettle and used to absorb moisture in the air. The invention provides a cold adsorption device for pre-treatment of nitrogen and oxygen, wherein the movable bars absorb moisture in the air, and after working for a period of time, the shielding cylinder rotates, the shielding cylinder shields the working movable bars, and cooperates with the grooves on the treatment kettle to restrict the movable bars in a sealed chamber, the heating plate inside the movable bars works to heat the adsorbent, reduce the adsorption limit of the adsorbent, release the moisture in the adsorbent, and another movable bar in the same working group is exposed and flush with the inner wall of the shielding cylinder, so as to facilitate the gas to continue to flow downward in a spiral along the inner wall of the treatment kettle; the adsorbent on the movable bars can be reused to ensure the smooth operation of the entire process.

Description

Technical Field

[0001] The invention relates to the technical field of nitrogen and oxygen production, in particular to a nitrogen and oxygen pretreatment cold adsorption device for manufacturing nitrogen and oxygen. Background Art

[0002] Nitrogen and oxygen are commonly used gases in industrial production. Since the atmosphere contains a large amount of nitrogen and oxygen and the boiling points of nitrogen and oxygen are different, industrial production of nitrogen and oxygen generally uses a distillation tower to separate nitrogen and oxygen from the air.

[0003] According to the publication (announcement) number CN103418208B, the publication (announcement) date is 2015.07.22, and a method for controlling pressure equalization of an air purifier is disclosed, comprising the following steps: 1) a flow meter is set at the outlet of the air purifier to monitor flow changes in real time; 2) by calculation, the gas flow required for pressure equalization of the first purification adsorption cylinder and the second purification adsorption cylinder is obtained, and the calculated amount is set as the control amount L1 during pressure equalization; 3) when pressure equalization starts, the air volume at the outlet of the air purifier is detected to be L, and the air pressure equalization solenoid valve is slowly opened until it is detected that the air volume at the outlet of the air purifier is L1 less than when the pressure equalization starts, that is, the outlet gas volume is L-L1; 4) the air pressure equalization solenoid valve continues to automatically adjust, and the outlet gas volume is automatically opened when it is greater than L-L1; if the gas volume is less than L-L1, it is automatically closed until the pressure equalization ends, the pressure difference between the first purification adsorption cylinder and the second purification adsorption cylinder is close to zero, the air pressure equalization solenoid valve is closed, and the air purifier pressure equalization stage is completed. Since the device is set up with a control method to control the opening of the equalizing valve according to the outlet flow of the purifier, the equalizing valve avoids multiple jumps and makes the gas flow change more stable, greatly reducing the impact on production conditions and reducing the workload of the regulator. Because it is controlled according to the flow rate, there is no need to consider the difference between left-to-right equalizing and right-to-left equalizing, nor the opening of the valve at each stage.

[0004] In the prior art including the above patents, when using air to separate nitrogen and oxygen, it is necessary to first use a self-cleaning filter to filter out mechanical impurities in the air, then use a centrifugal compressor to compress the air, and then use an air pre-cooling system to cool the compressed air. Then, a purifier removes moisture from the air, and finally a fractionation tower fractionates the air to obtain liquid nitrogen and liquid oxygen. Existing purifiers all use adsorbents to absorb moisture from the air, but the adsorbents have an adsorption limit. When the humidity of the air used is relatively high, the adsorbent will quickly reach the adsorption limit, affecting the normal operation of the purifier. Summary of the invention

[0005] The purpose of the present invention is to provide a cold adsorption device for manufacturing nitrogen and oxygen pretreatment, aiming to solve the above problems.

[0006] In order to achieve the above-mentioned object, the present invention provides a cold adsorption device for manufacturing nitrogen and oxygen pretreatment, comprising a treatment kettle, wherein the treatment kettle is provided with:

[0007] An air inlet pipe, the axis of which is tangent to the inner wall of the treatment kettle;

[0008] An adsorption assembly, comprising a plurality of movable bars movably arranged on the inner wall of the treatment kettle and used to absorb moisture in the air, wherein a heating plate for heating the adsorbent is arranged inside the movable bars;

[0009] A shielding cylinder is rotatably mounted on the processing kettle and is used to shield the movable bar. The shielding cylinder is provided with notches distributed in a circumferential array and adapted to the movable bar, wherein:

[0010] Two adjacent movable bars form a working group, and the shielding tube moves so that the two movable bars in the working group work alternately, and the unshielded movable bars are flush with the inner wall of the shielding tube.

[0011] Preferably, the movable strip is provided with inclined absorption sheets distributed in a linear array.

[0012] Preferably, the absorption sheet on the shielded movable strip abuts against the outer wall of the shielding tube to form an air flow channel.

[0013] Preferably, the movable bar is provided with through holes distributed in a linear array and used to connect the air flow channels in two adjacent working groups.

[0014] Preferably, an air guide pipe for guiding gas reflux is provided at the bottom of the processing kettle, and a guide ring for guiding reflux gas into the air flow channel is provided on the shielding cylinder.

[0015] Preferably, the processing kettle is provided with a compression assembly for compressing the air flowing out of the air flow channel, and the compression assembly is provided with an extrusion rod for pressing out the water droplets.

[0016] Preferably, the compression assembly comprises a lower plate fixedly mounted on the processing kettle and an upper plate movably mounted on the extrusion rod, and both the lower plate and the upper plate are provided with vortex-shaped extrusion plates.

[0017] Preferably, an air return pipe is provided on the upper plate, and a spoiler block connected with the air return pipe and used for mixing gas is provided inside the air intake pipe.

[0018] Preferably, a driving ring for driving the shielding cylinder and the movable bar to move is provided on the processing kettle, and the extrusion rod is rotated to make the driving ring reciprocate.

[0019] Preferably, a second guide groove for guiding the movement of the movable bar is movably provided on the driving ring, and the second guide groove includes a ring portion coaxial with the driving ring, a straight portion perpendicular to the ring portion, and an arc portion connecting the straight portion and the ring portion.

[0020] In the above technical scheme, a cold adsorption device for manufacturing nitrogen and oxygen pretreatment provided by the present invention has the following beneficial effects: when performing production work, compressed air with a relatively low temperature enters the processing kettle through the air inlet pipe and spirals downward along the inner wall of the processing kettle. When the air flows through the adsorption component, the adsorbent on the movable bar adsorbs moisture in the air, and the adsorbent has a better adsorption effect when the temperature is relatively low, and can remove moisture in the air as much as possible. After the movable bar has worked for a period of time, the shielding cylinder rotates, and the shielding cylinder shields the working movable bar, and cooperates with the groove on the processing kettle to confine the movable bar in a sealed chamber. The heating plate inside the movable bar works to heat the adsorbent, reduce the adsorption limit of the adsorbent, and release the moisture in the adsorbent. Another movable bar in the same working group is exposed and flush with the inner wall of the shielding cylinder, so that the gas continues to flow spirally downward along the inner wall of the processing kettle. The adsorbent on the movable bar can be reused to ensure the smooth operation of the entire process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the structure of an adsorption assembly provided in an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the structure of a guide ring provided in an embodiment of the present invention;

[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 A schematic diagram of the internal structure of a processing kettle provided in an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of an explosion structure provided by an embodiment of the present invention;

[0028] Figure 7 A schematic diagram of an explosion structure from another angle provided by an embodiment of the present invention;

[0029] Figure 8 A schematic diagram of a top view of a portion of a drive ring provided by an embodiment of the present invention;

[0030] Fig. 9 A schematic diagram of the structure of a drive ring provided in an embodiment of the present invention;

[0031] Fig.10 A schematic diagram of the structure of an activity bar provided by an embodiment of the present invention;

[0032] Fig.11 A schematic diagram of the structure of a guide disk provided in an embodiment of the present invention;

[0033] Fig.12 A schematic structural diagram of a spoiler block provided in an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1. Processing kettle; 111. movable strip; 112. Absorbing sheet; 113. Tenon rod; 114. Through hole; 115. Active sheet; 116. Driving ring; 117. Second guide groove; 118. Ring portion; 119. Arc portion; 121. Shielding tube; 122. First guide groove; 123. Guide ring; 124. Guide groove; 125. Air guide pipe; 126. Tenon block; 127. Traction rope; 128. Air return pipe; 129. Straight portion; 131. Lower plate; 132. Upper plate; 133. Extrusion plate; 134. Extrusion rod; 135. Mounting plate; 136. Guide plate; 137. Third guide groove; 138. Inner ring; 139. Outer ring; 141. Air inlet pipe; 142. Air outlet pipe; 144. Spoiler block; 145. Air outlet hole. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] like Figure 1-12 As shown, a cold adsorption device for pretreatment of nitrogen and oxygen is provided, comprising a treatment kettle 1, on which is provided:

[0038] The air inlet pipe 141, the axis of which is tangent to the inner wall of the treatment kettle 1;

[0039] An adsorption assembly, comprising a plurality of movable bars 111 movably disposed on the inner wall of the treatment vessel 1 and used for absorbing moisture in the air;

[0040] The shielding cylinder 121 is rotatably mounted on the processing kettle 1 and is used to shield the movable bar 111. The shielding cylinder 121 is provided with notches distributed in a circumferential array and adapted to the movable bar 111, wherein:

[0041] Two adjacent movable bars 111 form a working group. The shielding tube 121 moves so that the two movable bars 111 in the working group work alternately, and the unshielded movable bars 111 are flush with the inner wall of the shielding tube 121 .

[0042] Specifically, a groove for accommodating the movable bar 111 is opened on the inner wall of the processing kettle 1, and a heating plate for heating the adsorbent is arranged inside the movable bar 111. An air outlet pipe 142 is arranged at the bottom of the processing kettle 1. When the temperature is low, the adsorption limit of the adsorbent is larger and it can absorb more moisture. When the temperature is high, the adsorption limit is smaller and the amount of moisture that can be absorbed is also smaller.

[0043] In the above technical scheme, when production work is carried out, compressed air with a lower temperature enters the processing kettle 1 through the air inlet pipe 141 and spirals downward along the inner wall of the processing kettle 1. When the air flows through the adsorption component, the adsorbent on the movable bar 111 adsorbs moisture in the air, and the adsorbent has a better adsorption effect when the temperature is lower, and can remove moisture in the air as much as possible. After the movable bar 111 has worked for a period of time, the shielding tube 121 rotates, and the shielding tube 121 shields the working movable bar 111, and cooperates with the groove on the processing kettle 1 to restrict the movable bar 111 in a sealed chamber. The heating plate inside the movable bar 111 works to heat the adsorbent, reduce the adsorption limit of the adsorbent, and release the moisture in the adsorbent. Another movable bar 111 in the same working group is exposed and flush with the inner wall of the shielding tube 121, so that the gas continues to flow spirally downward along the inner wall of the processing kettle 1; the adsorbent on the movable bar 111 can be reused to ensure the smooth operation of the entire process.

[0044] As a further embodiment provided by the present invention, the movable bar 111 is provided with inclined absorption sheets 112 distributed in a linear array.

[0045] Specifically, the absorbent sheet 112 is covered with an absorbent.

[0046] Furthermore, the inclination angle of the absorption sheet 112 is similar to the downward inclination angle of the gas spiral, which can increase the contact area between the adsorbent and the air, thereby further removing moisture from the air.

[0047] As another embodiment further provided by the present invention, the absorption sheet 112 on the shielded movable bar 111 abuts against the outer wall of the shielding tube 121 to form an air flow channel.

[0048] Specifically, an air guide pipe 125 is provided on the processing kettle 1, one end of the air guide pipe 125 is connected to the air outlet pipe 142, and the other end is connected to the air flow channel.

[0049] Furthermore, during the operation, the heating plate inside the shielded movable bar 111 works to heat the adsorbent, and the adsorbent releases moisture. The air guide 125 guides the dry gas to flow into the air channel and is heated by the heating plate. After being heated, the dry gas flows upward and contacts the adsorbent, absorbing the moisture in the adsorbent, so that the adsorbent can be reused.

[0050] As another embodiment further provided by the present invention, the movable bar 111 is provided with through holes 114 distributed in a linear array and used to connect the air flow channels in two adjacent working groups.

[0051] Specifically, during the working process, the working active bar 111 moves toward the axis of the processing kettle 1 so that the active bar 111 is flush with the inner wall of the shielding tube 121, and the inclined absorption sheet 112 on the shielded active bar 111 abuts against the outer wall of the shielding tube 121 to form an oblique upward air flow channel, and the through hole 114 on the working active bar 111 connects the air flow channels in two adjacent working groups, so that the air flow channels in multiple working groups form a spiral upward flow channel, so that the dry gas can flow spirally upward to take away the moisture on the adsorbent.

[0052] As another embodiment further provided by the present invention, an air guide pipe 125 for guiding gas reflux is provided at the bottom of the processing kettle 1, and a guide ring 123 for guiding the reflux gas into the air flow channel is provided on the shielding tube 121.

[0053] Specifically, the guide ring 123 is provided with trumpet-shaped guide grooves 124 corresponding to the multiple working groups one by one, and the interior of the processing kettle 1 is provided with an annular groove for gas flow, the top of the annular groove faces the multiple guide grooves 124, and the air guide pipe 125 is connected to the annular groove.

[0054] Furthermore, the guide ring 123 rotates with the shielding cylinder 121 so that the top of the guide groove 124 is always facing the shielded active bar 111. During operation, part of the dry air flowing through the outlet pipe 142 will flow back along the air guide pipe 125 to the annular groove in the processing kettle 1, and will be guided by the guide groove 124 into the air flow channel formed by the shielding active bar 111 and the shielding cylinder 121. The dry air flows along the air flow channel to take away part of the moisture on the adsorbent.

[0055] As another embodiment further provided by the present invention, a compression assembly for compressing the air flowing out of the air channel is disposed on the processing kettle 1, and an extrusion rod 134 for pressing out the water droplets is disposed on the compression assembly.

[0056] Specifically, a flow channel for the water beads to flow out is opened on the processing kettle 1.

[0057] Furthermore, during operation, the humid air flowing out of the air flow channel will enter the compression component, which compresses the air to lower the dew point of the air, causing the moisture in the air to condense into water droplets. At this time, the extrusion rod 134 rotates relative to the compression component to discharge the water droplets in the compression component.

[0058] As another embodiment further provided by the present invention, the compression assembly includes a lower plate 131 fixedly mounted on the processing kettle 1 and an upper plate 132 movably mounted on the extrusion rod 134 , and a vortex-shaped extrusion plate 133 is provided on both the lower plate 131 and the upper plate 132 .

[0059] Specifically, the extrusion rod 134 is coaxially distributed with the lower plate 131 , a mounting plate 135 is provided on the extrusion rod 134 , the upper plate 132 is eccentrically mounted on the mounting plate 135 , and the upper plate 132 is slidably mounted on the lower plate 131 .

[0060] Furthermore, during the rotation of the extrusion rod 134, the mounting plate 135 on the extrusion rod 134 drives the upper plate 132 to move, and the upper plate 132 translates along a circular motion trajectory under the restriction of the lower plate 131 (refer to a scroll compressor). The extrusion plate 133 on the upper plate 132 cooperates with the extrusion plate 133 on the lower plate 131 to compress the humid air, lower the dew point of the air, and condense the moisture in the air into water droplets for easy discharge.

[0061] As another embodiment further provided by the present invention, a return air pipe 128 is disposed on the upper plate 132 , and a spoiler 144 communicating with the return air pipe 128 and used for mixing gas is disposed inside the air inlet pipe 141 .

[0062] Specifically, a pressure relief valve is provided inside the return air pipe 128, the cross-section of the spoiler block 144 is an isosceles trapezoid, and the larger bottom surface of the spoiler block 144 faces the gas flow direction of the intake pipe 141, a flow channel is opened in the middle of the spoiler block 144, and a plurality of air outlet holes 145 connected to the flow channel are opened on two inclined surfaces of the spoiler block 144. The spoiler block 144 is specifically made of a metal with good thermal conductivity (such as: copper alloy).

[0063] Furthermore, when the compression assembly is working, the gas in the compression assembly is continuously compressed. When the predetermined pressure is reached, the high-pressure gas enters the flow channel in the middle of the spoiler block 144 through the pressure relief valve and the return pipe 128, and is ejected to the oblique rear of the spoiler block 144 through the outlet hole 145. At the same time, the gas in the intake pipe 141 will contact the larger bottom surface of the spoiler block 144 during the flow, and form a vortex flowing to the oblique rear of the spoiler block 144. The vortex contacts the airflow ejected from the outlet pipe 142, so that the airflow is fully mixed, avoiding the high-humidity air flowing out of the outlet hole 145 from gathering together. At the same time, the low-temperature air in the intake pipe 141 will also cool the spoiler block 144, and then cool the gas flowing out of the return pipe 128, avoiding the high-temperature gas from affecting the operation of the adsorbent.

[0064] As another embodiment further provided by the present invention, a driving ring 116 for driving the shielding cylinder 121 and the movable bar 111 to move is provided on the processing kettle 1, and the extrusion rod 134 rotates to make the driving ring 116 reciprocate.

[0065] Specifically, a motor is provided on the processing kettle 1, a guide disk 136 is provided on the output end of the motor, the extrusion rod 134 is fixedly mounted on the guide disk 136, a torsion spring is provided between the driving ring 116 and the processing kettle 1, a tenon block 126 is slidably provided on the processing kettle 1, a traction rope 127 is provided between the tenon block 126 and the driving ring 116, and a third guide groove 137 adapted to the tenon block 126 is provided on the guide disk 136, the third guide groove 137 includes an inner ring 138 and an outer ring 139 coaxial with the guide disk 136, and an inclined groove connecting the inner ring 138 and the outer ring 139.

[0066] Furthermore, during operation, the motor drives the guide plate 136 to rotate, so that the tenon 126 moves along the third guide groove 137. However, when the tenon 126 moves from the outer ring 139 of the third guide groove 137 to the inner ring 138, the traction rope 127 between the drive ring 116 and the tenon 126 is tightened to drive the drive ring 116 to rotate, thereby driving the shielding tube 121 to rotate and the movable bar 111 to slide.

[0067] As another embodiment further provided by the present invention, a second guide groove 117 is movably provided on the driving ring 116 for guiding the movement of the movable bar 111. The second guide groove 117 includes a ring portion 118 coaxial with the driving ring 116, a straight portion 129 perpendicular to the ring portion 118, and an arc portion 119 connecting the straight portion 129 and the ring portion 118.

[0068] Specifically, the multiple second guide grooves 117 on the driving ring 116 correspond one-to-one to the multiple movable bars 111, the movable bar 111 is provided with a tenon rod 113 adapted to the second guide groove 117, a spring is provided between the movable bar 111 and the processing kettle 1, a movable piece 115 is hinged at the connection between the arc portion 119 and the ring portion 118, a torsion spring is provided between the movable piece 115 and the driving ring 116, the second guide grooves 117 corresponding to the two movable bars 111 in the same working group are mirror-imaged, the driving ring 116 is provided with a first guide groove 122 for guiding the movement of the shielding tube 121, and the shielding tube 121 is provided with a protrusion extending to the inside of the first guide groove 122.

[0069] Furthermore, when production work is carried out, compressed air with a lower temperature enters the processing kettle 1 through the air inlet pipe 141 and spirals downward along the inner wall of the processing kettle 1. When the air flows through the adsorption component, the adsorbent on the movable bar 111 adsorbs moisture in the air, and the adsorbent has a better adsorption effect when the temperature is lower, and can remove moisture in the air as much as possible. The inclination angle of the absorption sheet 112 on the movable bar 111 is similar to the inclination angle of the gas spiraling downward, which can increase the contact area between the adsorbent and the air, and further remove moisture in the air. At this time, the tenon rod 113 on the working movable bar 111 is at the connection between the straight portion 129 and the arc portion 119 of the corresponding second guide groove 117, and the tenon rod 113 on the blocked movable bar 111 is at the end of the corresponding second guide groove 117 away from the straight portion 129.

[0070] After the movable bar 111 has been working for a period of time, the adsorbent on the movable bar 111 is about to reach the adsorption limit. At this time, the motor output torque drives the guide plate 136 to rotate, so that the tenon 126 moves along the third guide groove 137. However, when the tenon 126 moves from the outer ring 139 of the third guide groove 137 to the inner ring 138, the traction rope 127 between the drive ring 116 and the tenon 126 is tightened to drive the drive ring 116 to rotate. The tenon rod 113 of the movable bar 111 in operation moves along the arc portion 119 and pushes the movable sheet 115 into the ring portion 118. The movable sheet 115 seals the arc portion 119 under the action of the torsion spring, and the movable bar 111 shrinks into the groove on the processing kettle 1. During this process, the protrusion on the shielding cylinder 121 moves along the first guide groove 122 on the drive ring 116, and the shielding cylinder 121 remains in its original position. The tenon block 126 on the blocked movable bar 111 moves along the ring portion 118 corresponding to the second guide groove 117, and the driving ring 116 continues to rotate, pushing the shielding tube 121 to rotate, blocking the working movable bar 111. The tenon rod 113 on the previously blocked movable bar 111 is opposite to the straight portion 129 of the second guide groove 117. The movable bar 111 moves toward the center of the processing kettle 1 under the push of the spring, so that the movable bar 111 is flush with the inner wall of the shielding tube 121, and the adsorption work begins. The inclined absorption sheet 112 on the blocked movable bar 111 abuts against the outer wall of the shielding tube 121 to form an oblique upward air flow channel, and the through hole 114 on the working movable bar 111 connects the air flow channels in two adjacent working groups, so that the air flow channels in multiple working groups form a spiral upward flow channel.

[0071] Moreover, the guide ring 123 rotates with the shielding cylinder 121 so that the top of the guide groove 124 is always facing the shielded active bar 111. The heating plate inside the active bar 111 shielded by the shielding cylinder 121 works to heat the adsorbent, reduce the adsorption limit of the adsorbent, and release the moisture in the adsorbent. Part of the dry air flowing through the outlet pipe 142 will flow back along the air guide pipe 125 to the annular groove in the processing kettle 1, and will be guided by the guide groove 124 into the air flow channel formed by the shielded active bar 111 and the shielding cylinder 121. The dry air flows along the air flow channel to take away part of the moisture on the adsorbent.

[0072] The gas in the air flow channel flows upward into the compression assembly, and the motor drives the extrusion rod 134 to rotate through the guide plate 136. The mounting plate 135 on the extrusion rod 134 drives the upper plate 132 to move. The upper plate 132 translates along a circular motion trajectory under the restriction of the lower plate 131 (refer to the scroll compressor). The extrusion plate 133 on the upper plate 132 cooperates with the extrusion plate 133 on the lower plate 131 to compress the humid air, lower the dew point of the air, and condense the moisture in the air into water droplets, and the extrusion rod 134 discharges the water droplets.

[0073] When the compression assembly is working, the gas in the compression assembly is continuously compressed. When the predetermined pressure is reached, the high-pressure gas enters the flow channel in the middle of the spoiler block 144 through the pressure relief valve and the return pipe 128, and is ejected to the oblique rear of the spoiler block 144 through the outlet hole 145. At the same time, the gas in the intake pipe 141 will contact the larger bottom surface of the spoiler block 144 during the flow, and form a vortex flowing to the oblique rear of the spoiler block 144. The vortex contacts the airflow ejected from the outlet pipe 142, so that the airflow is fully mixed, avoiding the high-humidity air flowing out of the outlet hole 145 from gathering together. At the same time, the low-temperature air in the intake pipe 141 will also cool the spoiler block 144, and then cool the gas flowing out of the return pipe 128, avoiding the high-temperature gas from affecting the operation of the adsorbent.

[0074] The adsorbent on the movable bar can be reused to ensure the smooth operation of the entire process.

[0075] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cold adsorption device for pretreatment of nitrogen and oxygen, characterized in that: It comprises a processing kettle, on which is provided: An air inlet pipe, the axis of which is tangent to the inner wall of the treatment kettle; An adsorption assembly, comprising a plurality of movable bars movably arranged on the inner wall of the treatment kettle and used to absorb moisture in the air, wherein a heating plate for heating an adsorbent is arranged inside the movable bars; A shielding cylinder is rotatably mounted on the processing kettle and is used to shield the movable bar. The shielding cylinder is provided with notches distributed in a circumferential array and adapted to the movable bar, wherein: Two adjacent movable bars form a working group, and the shielding tube moves so that the two movable bars in the working group work alternately, and the unshielded movable bars are flush with the inner wall of the shielding tube; A groove for accommodating the movable strip is provided on the inner wall of the processing kettle, and an air outlet pipe is provided at the bottom of the processing kettle. When the temperature is low, the adsorption limit of the adsorbent is large and it can absorb more water. When the temperature is high, the adsorption limit is small and the water that can be absorbed is also small. The movable strip is provided with inclined absorption sheets distributed in a linear array, and the absorption sheets are covered with an adsorbent; The absorption sheet on the shielded movable strip abuts against the outer wall of the shielding tube to form an air flow channel. The processing kettle is provided with an air guide pipe, one end of which is connected to the air outlet pipe, and the other end of which is connected to the air flow channel. The movable bar is provided with through holes distributed in a linear array and used to connect the air flow channels in two adjacent working groups; The bottom of the processing kettle is provided with an air guide pipe for guiding gas reflux, the shielding cylinder is provided with a guide ring for guiding the reflux gas into the air flow channel, the guide ring is provided with trumpet-shaped guide grooves corresponding to the multiple working groups one by one, the inside of the processing kettle is provided with an annular groove for gas flow, the top of the annular groove is directly opposite to the multiple guide grooves, and the air guide pipe is connected with the annular groove; The processing kettle is provided with a compression assembly for compressing the air flowing out of the air flow channel, the compression assembly is provided with an extrusion rod for pressing out the water droplets, and the processing kettle is provided with a flow channel for the water droplets to flow out; The processing kettle is provided with a driving ring for driving the shielding cylinder and the movable bar to move, the extrusion rod rotates to make the driving ring reciprocate, the processing kettle is provided with a motor, a guide disk is provided on the output end of the motor, the extrusion rod is fixedly installed on the guide disk, a torsion spring is provided between the driving ring and the processing kettle, a tenon block is slidably provided on the processing kettle, a traction rope is provided between the tenon block and the driving ring, and a third guide groove adapted to the tenon block is provided on the guide disk, the third guide groove includes an inner ring and an outer ring coaxial with the guide disk and an inclined groove connecting the inner ring and the outer ring; The driving ring is movably provided with a second guide groove for guiding the movement of the movable bar, the second guide groove includes a ring portion coaxial with the driving ring, a straight portion perpendicular to the ring portion, and an arc portion connecting the straight portion and the ring portion, a plurality of second guide grooves on the driving ring correspond one-to-one to a plurality of movable bars, a tenon rod adapted to the second guide groove is provided on the movable bar, a spring is provided between the movable bar and the processing kettle, a movable sheet is hinged at the connection between the arc portion and the ring portion, a torsion spring is provided between the movable sheet and the driving ring, the second guide grooves corresponding to the two movable bars in the same working group are mirror-imaged, a first guide groove for guiding the movement of the shielding tube is provided on the driving ring, and a protrusion extending to the inside of the first guide groove is provided on the shielding tube.

2. A nitrogen and oxygen pretreatment cold adsorption device according to claim 1, characterized in that: The compression assembly comprises a lower plate fixedly mounted on the processing kettle and an upper plate movably mounted on the extrusion rod, and both the lower plate and the upper plate are provided with a vortex-shaped extrusion plate.

3. The cold adsorption device for pretreatment of nitrogen and oxygen according to claim 2 is characterized in that: The upper plate is provided with an air return pipe, and the interior of the air intake pipe is provided with a spoiler block which is in communication with the air return pipe and is used for mixing gas.

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