A low-pressure air continuous drying equipment

Abstract

The present invention discloses a low-pressure air continuous drying device, which belongs to the field of air treatment technology. It comprises a first adsorption tower, wherein the first adsorption tower comprises a tower body, and a first grid box, a first isolation box, a second grid box, a second isolation box, and a third grid box are installed in the tower body. The first grid box, the second grid box, and the third grid box divide the tower body into an inner cavity, a drying cavity, and an outer cavity; the first isolation box, the second isolation box, and the third isolation box are each provided with a plurality of guide holes, and the opening state of the guide holes is controlled by a blocking component. In the present invention, hot air enters the corresponding inner cavity from the top of the adsorption tower, and the blocking block first blocks the guide hole. At this time, the hot air enters the drying cavity and then the outer cavity from the inner cavity along the radial direction of the adsorption tower, and the moisture of the desiccant in multiple groups of drying cavities is synchronously separated, so as to realize synchronous drying in multiple drying cavities, reduce the influence of the upper hot and humid gas on the lower desiccant, and thus improve the drying efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of air treatment, and more particularly to a low-pressure air continuous drying device. Background Art

[0002] In the existing air drying equipment, the alumina or molecular sieve in the adsorption tower is filled in the tower, and the low-pressure gas is introduced from the bottom for gas drying, and the hot air is introduced from the top to regenerate and dry the alumina or molecular sieve. When the alumina or molecular sieve is regenerated, the hot air is transported from the top to the bottom, so that the alumina or molecular sieve is sequentially regenerated and dried. The alumina or molecular sieve is piled up together, causing the top to dry faster. After the hot air at the top absorbs moisture, it will affect the alumina or molecular sieve in the lower layer, thereby reducing the drying speed of the lower layer, making the regeneration and drying of the desiccant asynchronous and easily causing the top desiccant to be over-dried. In view of this, we propose a low-pressure air continuous drying equipment. Summary of the invention

[0003] The purpose of the present invention is to provide a low-pressure air continuous drying device, which solves the technical problem of asynchronous regeneration and drying of the desiccant from top to bottom in the adsorption tower in the prior art.

[0004] The embodiment of the present invention provides a low-pressure air continuous drying device, comprising a first adsorption tower, the first adsorption tower comprising a tower body, a first grid box is fixedly installed in the tower body, a first isolation box is fixedly installed on the top of the first grid box, a second grid box is fixedly installed on the top of the first isolation box, a second isolation box is fixedly installed on the top of the second grid box, a third grid box is fixedly installed on the top of the second isolation box, and the third isolation box is fixedly installed on the bottom of the first grid box;

[0005] The first grid box, the second grid box and the third grid box divide the tower body into an inner chamber, a drying chamber and an outer chamber;

[0006] The first isolation box, the second isolation box and the third isolation box are each provided with a plurality of diversion holes, and the opening state of the diversion holes is controlled by a blocking component;

[0007] Three sets of drainage components are installed in the tower body. The drainage components are located in the outer cavity and are used to block the air between the upper and lower adjacent outer cavities and the outer cavity and the tower body.

[0008] By rotating a number of blocking components, the guide holes are controlled to be opened or closed, and the flow direction of the low-pressure air or hot air entering the tower body is switched.

[0009] Preferably, the first adsorption tower further includes a driving assembly, the driving assembly includes a motor, the motor is fixedly mounted on the tower body, the output shaft of the motor is fixedly connected to a support shaft, the support shaft is rotatably connected to the tower body and inserted into the inner cavity, three groups of separation cylinders are fixedly mounted on the support shaft, the three groups of separation cylinders are rotatably connected to the second isolation box, the first isolation box and the third isolation box from top to bottom, respectively, the separation cylinders are used to isolate two groups of inner cavities adjacent to each other, and three groups of guide pipes are fixedly mounted on the support shaft;

[0010] The third grid box is fixedly mounted with a fixed pipe, the guide pipe is connected with the fixed pipe and is inside the fixed pipe, and the bottoms of the three groups of guide pipes are respectively inserted into the inner cavity areas corresponding to the first grid box, the second grid box and the third grid box.

[0011] Preferably, the first isolation box, the second isolation box and the third isolation box are each provided with a sealing assembly, the sealing assembly comprising a fixing frame, the fixing frame is fixedly connected to the corresponding separation cylinder, a plurality of sealing blocks are fixedly mounted on the fixing frame, one side of each sealing block is fixedly connected to a baffle, a plurality of through holes are formed on the baffle, and the bottom surface of the baffle is higher than the guide hole, so as to disperse the flowing air into the isolation box.

[0012] Preferably, the drying chambers of the first grid box and the third grid box are filled with alumina, the drying chamber of the second grid box is filled with molecular sieves, and the height ratio of the first grid box, the second grid box and the third grid box is 6:3:1.

[0013] Preferably, a top plate is fixedly mounted on the tower body, for sealing the top of the outer cavity formed by the third grid box;

[0014] The drainage assembly includes a fixed plate and a support plate, both of which are fixedly installed in the tower body, and several fixed plates are at the same height as the bottoms of the corresponding first grid box, second grid box and third grid box. Drainage holes are opened on the fixed plates, and a sealing plate is slidably connected to the support plate, and the sealing plate is used to block the drainage holes. Several elastic parts are installed on the sealing plate, one end of the elastic part is fixedly connected to the sealing plate, and the other end is fixedly connected to the support plate; the sum of the elastic forces of the three groups of drainage assemblies gradually increases from top to bottom.

[0015] Preferably, a converter box is fixedly installed in the tower body, the converter box is rotatably connected to the tower body, the bottom of the converter box is open and communicated with the inside of the tower body, the converter box is located directly above the third grid box, a guide box is fixedly installed in the converter box, the guide box is rotatably connected to the fixed pipe and communicated with each other, the support shaft passes through the guide box and the fixed pipe and is fixedly connected to the guide box, a converter tube is connected to the guide box, the converter tube passes through the converter box, and a converter hole is opened on the converter box.

[0016] Preferably, it further comprises a first filter, a second adsorption tower, and a second filter, wherein the air inlet of the first adsorption tower is connected to the air outlet of the first filter through a first connecting pipe, the air inlet of the second adsorption tower is connected to the air outlet of the first filter through a second connecting pipe, the first connecting pipe is provided with a first pneumatic valve, and the second connecting pipe is provided with a second pneumatic valve;

[0017] The air inlet of the second filter is connected to the air outlet of the first adsorption tower through the third connecting pipe, the air inlet of the second filter is connected to the second adsorption tower through the fourth connecting pipe, the third connecting pipe is equipped with a third pneumatic valve, the fourth connecting pipe is equipped with a fourth pneumatic valve, and the air outlet of the second filter is connected to the fifth connecting pipe;

[0018] The second adsorption tower has the same structure as the first adsorption tower.

[0019] Preferably, it also includes a heater, the air inlet of the heater is connected to the fifth connecting pipe through the sixth connecting pipe, the sixth connecting pipe is installed with a throttle valve, the air outlet of the heater is installed with a reversing valve, the two air outlets of the reversing valve are respectively connected with the seventh connecting pipe and the eighth connecting pipe, the seventh connecting pipe is connected to the air outlet of the first adsorption tower, the eighth connecting pipe is connected to the air outlet of the second adsorption tower, the seventh connecting pipe is installed with a first one-way valve, and the eighth connecting pipe is installed with a second one-way valve.

[0020] Preferably, it also includes a third filter and a silencer assembly, the silencer assembly is connected to the air outlet of the third filter, the air inlet of the first adsorption tower is connected to the air inlet of the third filter through the first return pipe, the air inlet of the second adsorption tower is connected to the air inlet of the third filter through the second return pipe, the fifth pneumatic valve is installed on the first return pipe, and the sixth pneumatic valve is installed on the second return pipe.

[0021] Preferably, the silencer assembly includes a silencer and a speed reducer pipe, the speed reducer pipe is fixedly installed at the air inlet of the silencer and are interconnected, the speed reducer pipe is connected to the air outlet of the third filter, a plurality of baffles are obliquely installed in the speed reducer pipe, and the plurality of baffles are staggered, a pressure relief pipe is fixedly installed on the speed reducer pipe, a partition plate is slidably connected to the inside of the pressure relief pipe, the partition plate is used to block the internal space of the pressure relief pipe up and down, a plurality of elastomers are arranged in the pressure relief pipe, one end of the elastomer is fixedly connected to the pressure relief pipe, and the other end is fixedly connected to the partition plate, the interior of the baffle is hollow and connected to the interior of the pressure relief pipe, a plurality of baffle holes are opened at the bottom of the baffle plate, the partition plate is higher than the connection between the baffle plate and the pressure relief pipe, a diverter pipe connected to the pressure relief pipe is arranged in the speed reducer pipe, the diverter pipe is higher than the baffle, and a third one-way valve is installed in the diverter pipe.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] 1. The present invention controls the opening or closing of the guide hole by rotating the blocking block, thereby controlling the flow direction of the gas in the adsorption tower. When drying the low-pressure air, the gas enters from the bottom of the adsorption tower and passes through a plurality of drying chambers from bottom to top to dry the gas; when regenerating and drying the alumina and molecular sieve in the adsorption tower, the hot air enters the corresponding inner cavity from the top of the adsorption tower, and the blocking block first blocks the guide hole. At this time, the hot air enters the drying chamber from the inner cavity and then enters the outer cavity along the radial direction of the adsorption tower, and the moisture of the desiccant in multiple groups of drying chambers is synchronously separated, so that synchronous drying is achieved in multiple drying chambers, and the influence of the upper hot and humid gas on the lower desiccant is reduced, thereby improving the drying efficiency. After the set time of desiccant regeneration, the blocking block is separated from the guide hole. At this time, the hot air passes through a plurality of drying chambers from top to bottom to perform sequential drying, thereby ensuring that the desiccant in the drying chamber can be regenerated, and improving the stability of regeneration.

[0024] 2. When the hot air radially flows to regenerate the desiccant in the present invention, the blocking block rotates to block the guide hole, and the converter box and the guide box rotate synchronously with the blocking block, so that the hot air enters the guide box and then enters the corresponding inner cavity; when the hot air regenerates the desiccant in the drying cavity from top to bottom, the blocking block rotates to disengage from the guide hole, and the converter box and the guide box rotate synchronously with the blocking block, so that the hot air switches to enter the converter box, thereby realizing the switching of the flow direction of the hot air.

[0025] 3. The sum of the elastic forces of the three groups of drainage components of the present invention gradually increases from top to bottom, which can effectively prevent the hot air from directly flowing out from the inner cavity, drying cavity, outer cavity and drainage holes of the lowest drainage component corresponding to the first grid box when the alumina or molecular sieve is dried, thereby ensuring the high efficiency and stability of drying.

[0026] 4. After the air enters the deceleration tube, it is effectively decelerated by the baffle plate, thereby reducing noise and having a certain pressure-maintaining effect, thereby increasing the drying time of the dry gas in the adsorption tower. When the air flow rate is large, the gas enters the baffle plate and the pressure relief tube from the baffle hole and pushes the partition plate to compress the elastic body. When the height of the partition plate is higher than the connecting point of the diverter pipe, the gas is quickly diverted from the diverter pipe, thereby avoiding excessive air pressure in the adsorption tower.

[0027] 5. The present invention sets two groups of adsorption towers. When the first adsorption tower is in working state, part of the dried air flows to the next process, and the other part of the air flows back into the second adsorption tower to dry the desiccant therein. By switching the working states of the first adsorption tower and the second adsorption tower at regular intervals, the desiccant in the adsorption tower is circulated and dried, thereby effectively improving the utilization rate of the desiccant. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A working principle diagram of a low-pressure air continuous drying device disclosed in a preferred embodiment of the present invention;

[0029] Figure 2 A cross-sectional view of an adsorption tower of a low-pressure air continuous drying device disclosed in a preferred embodiment of the present invention;

[0030] Figure 3 A schematic diagram of the distribution of drying chambers of a low-pressure air continuous drying device disclosed in a preferred embodiment of the present invention;

[0031] Figure 4 A sectional view of a driving component of a low-pressure air continuous drying device disclosed in a preferred embodiment of the present invention;

[0032] Figure 5 A schematic diagram of the structure of a plugging component of a low-pressure air continuous drying device disclosed in a preferred embodiment of the present invention;

[0033] Figure 6 A schematic diagram of the position of a blocking block of a low-pressure air continuous drying device disclosed in a preferred embodiment of the present invention;

[0034] Figure 7 A low-pressure air continuous drying device disclosed in a preferred embodiment of the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0035] Figure 8 A low-pressure air continuous drying device disclosed in a preferred embodiment of the present invention Figure 3 The enlarged structural diagram at B in the middle;

[0036] Fig. 9 A schematic diagram of the position of the exchange holes of a low-pressure air continuous drying device disclosed in a preferred embodiment of the present invention;

[0037] Fig.10 The present invention is a schematic diagram of the structure of a silencer component of a low-pressure air continuous drying device disclosed in a preferred embodiment of the present invention.

[0038] Explanation of the reference numerals in the figure: 1. first filter; 2. first adsorption tower; 3. second adsorption tower; 4. first connecting pipe; 5. second connecting pipe; 6. first pneumatic valve; 7. second pneumatic valve; 8. second filter; 9. third connecting pipe; 10. fourth connecting pipe; 11. third pneumatic valve; 12. fourth pneumatic valve; 13. fifth connecting pipe; 14. heater; 15. sixth connecting pipe; 16. throttle valve; 17. reversing valve; 18. seventh connecting pipe; 19. eighth connecting pipe; 20. first check valve; 21. tower body; 22. first grid box; 23. inner cavity; 24. drying cavity; 25. outer cavity; 26. first isolation box; 27. second grid box; 28. second isolation box; 29. ​​third grid box; 30. second check valve; 31. third filter; 32. silencer assembly; 33. first reflux pipe; 34. second reflux pipe; 35. 5. Fifth pneumatic valve; 36. Sixth pneumatic valve; 210. Third isolation box; 211. Fixed pipe; 212. Driving assembly; 213. Blocking assembly; 214. Diversion hole; 215. Top plate; 216. Drainage assembly; 217. Flow change box; 218. Flow change box; 219. Flow change pipe; 220. Flow change hole; 321. Muffler; 322. Speed ​​reduction pipe; 323. Baffle; 324. Pressure relief pipe; 325 , partition plate; 326, elastomer; 327, diverter pipe; 328, third one-way valve; 2121, motor; 2122, support shaft; 2123, partition cylinder; 2124, guide pipe; 2131, fixing frame; 2132, blocking block; 2133, baffle; 2134, through hole; 2161, fixing plate; 2162, support plate; 2163, drainage hole; 2164, sealing plate; 2165, elastic member. DETAILED DESCRIPTION

[0039] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0040] Reference Figure 1 The present embodiment discloses a low-pressure air continuous drying device, comprising a first filter 1, a first adsorption tower 2 and a second adsorption tower 3. The air inlet of the first adsorption tower 2 is connected to the air outlet of the first filter 1 through a first connecting pipe 4, and the air inlet of the second adsorption tower 3 is connected to the air outlet of the first filter 1 through a second connecting pipe 5. A first pneumatic valve 6 is installed on the first connecting pipe 4, and a second pneumatic valve 7 is installed on the second connecting pipe 5. The first pneumatic valve 6 and the second pneumatic valve 7 are used to control the air delivery in the first connecting pipe 4 and the second connecting pipe 5.

[0041] The drying equipment also includes a second filter 8, the air inlet of the second filter 8 is connected to the air outlet of the first adsorption tower 2 through a third connecting pipe 9, the air inlet of the second filter 8 is connected to the second adsorption tower 3 through a fourth connecting pipe 10, a third pneumatic valve 11 is installed on the third connecting pipe 9, a fourth pneumatic valve 12 is installed on the fourth connecting pipe 10, and a fifth connecting pipe 13 is installed on the air outlet of the second filter 8 for sending the dried gas to the next process.

[0042] The drying equipment also includes a heater 14, an air inlet of the heater 14 is connected to the fifth connecting pipe 13 through a sixth connecting pipe 15, a throttle valve 16 is installed on the sixth connecting pipe 15, the throttle valve 16 is used to control the air flowing in the fifth connecting pipe 13 to enter the heater 14 according to a certain proportion, a reversing valve 17 is installed at the air outlet of the heater 14, two air outlets of the reversing valve 17 are respectively connected to a seventh connecting pipe 18 and an eighth connecting pipe 19, the seventh connecting pipe 18 is connected to the air outlet of the first adsorption tower 2, the eighth connecting pipe 19 is connected to the air outlet of the second adsorption tower 3, a first one-way valve 20 is installed on the seventh connecting pipe 18, and a second one-way valve 30 is installed on the eighth connecting pipe 19. The first one-way valve 20 and the second one-way valve 30 are both used to control the air output from the heater 14 to flow into the first adsorption tower 2 or the second adsorption tower 3 to avoid backflow problems. The dried flowing air is filtered by the second filter 8 and then enters the heater 14, so as to prevent dust from entering and accumulating in the heater 14, thereby ensuring the working stability of the heater 14. After entering the heater 14, the flowing air is fully heated and then flows to the corresponding adsorption tower to dry the wet desiccant, thereby realizing the recycling of the desiccant.

[0043] The drying equipment also includes a third filter 31 and a silencer assembly 32. The silencer assembly 32 is connected to the air outlet of the third filter 31. The air inlet of the first adsorption tower 2 is connected to the air inlet of the third filter 31 through the first return pipe 33. The air inlet of the second adsorption tower 3 is connected to the air inlet of the third filter 31 through the second return pipe 34. A fifth pneumatic valve 35 is installed on the first return pipe 33, and a sixth pneumatic valve 36 is installed on the second return pipe 34. By setting two groups of adsorption towers, when the first adsorption tower 2 is in working state, part of the dried air flows to the next process, and the other part of the air flows back into the second adsorption tower 3 to dry the desiccant therein. By switching the working state of the first adsorption tower 2 and the second adsorption tower 3 at a fixed time, the desiccant in the adsorption tower is circulated and dried, and the utilization rate of the desiccant is effectively improved.

[0044] Reference Figure 2 and Figure 3The first adsorption tower 2 includes a tower body 21, a first grid box 22 is fixedly installed in the tower body 21, and the first grid box 22 divides the space of the corresponding height in the tower body 21 into an inner cavity 23, a drying cavity 24 and an outer cavity 25. A first isolation box 26 is fixedly installed on the top of the first grid box 22, and a second grid box 27 is fixedly installed on the top of the first isolation box 26. The second grid box 27 also divides the space of the corresponding height in the tower body 21 into the inner cavity 23, the drying cavity 24 and the outer cavity 25. A second isolation box 28 is fixedly installed on the top of the second grid box 27, and a third grid box 2 is fixedly installed on the top of the second isolation box 28. 9. The third grid box 29 divides the space of corresponding height in the tower body 21 into an inner cavity 23, a drying cavity 24 and an outer cavity 25. A third isolation box 210 is fixedly installed at the bottom of the first grid box 22. A fixed pipe 211 is fixedly installed on the third grid box 29. The first grid box 22 and the third grid box 29 are filled with alumina. The second grid box 27 is filled with molecular sieves. The flowing air can pass through the first grid box 22, the second grid box 27 and the third grid box 29. The height ratio of the first grid box 22, the second grid box 27 and the third grid box 29 is 6:3:1, thereby realizing layered drying and improving the air drying effect.

[0045] Reference Figures 2 to 6 The first adsorption tower 2 also includes a driving assembly 212, which includes a motor 2121. The motor 2121 is fixedly mounted on the tower body 21 or mounted on other fixed components. The output shaft of the motor 2121 is fixedly connected to a support shaft 2122. The support shaft 2122 is rotatably connected to the tower body 21 and inserted into the inner cavity 23. Three groups of separation cylinders 2123 are fixedly mounted on the support shaft 2122. The three groups of separation cylinders 2123 are respectively connected to the second isolation box 28 from top to bottom. The first isolation box 26 and the third isolation box 210 are rotatably connected, and the separation cylinder 2123 is used to isolate the isolation box from the inner cavity 23 and to isolate the two adjacent groups of inner cavities 23. Three groups of guide pipes 2124 are fixedly installed on the support shaft 2122. The guide pipes 2124 are connected to the fixed pipe 211 and are located in the fixed pipe 211. The bottoms of the three groups of guide pipes 2124 are respectively inserted into the inner cavity 23 areas corresponding to the first grille box 22, the second grille box 27 and the third grille box 29.

[0046] A sealing component 213 is installed on each separation tube 2123, and the sealing component 213 is located in the first isolation box 26, the second isolation box 28 or the third isolation box 210. The sealing component 213 includes a fixing frame 2131, which is fixedly connected to the corresponding separation tube 2123. A plurality of sealing blocks 2132 are fixedly installed on the fixing frame 2131. A baffle 2133 is fixedly connected to one side of each sealing block 2132, and a plurality of through holes 2134 are provided on the baffle 2133; the diameter of the sealing block 2132 gradually increases along the direction in which the diameter of the isolation box gradually increases, and a plurality of guide holes 214 are provided at the bottom of the first isolation box 26, the second isolation box 28 and the third isolation box 210. The sealing block 2132 is used to block the guide holes 214, and the bottom surface of the baffle 2133 is higher than the guide holes 214, so as to disperse the flowing air into the isolation box.

[0047] Reference Figure 2 and Figure 7 A top plate 215 is fixedly installed on the tower body 21, which is used to block the top of the outer cavity 25 formed by the third grid box 29. Three sets of drainage components 216 are installed in the tower body 21. The drainage components 216 are located in the outer cavity 25, which are used to block the air between the upper and lower adjacent outer cavities 25 and the outer cavity 25 and the tower body 21. The drainage components 216 include a fixed plate 2161 and a support plate 2162. The fixed plate 2161 and the support plate 2162 are both fixedly installed in the tower body 21. Several fixed plates 2161 are at the same height as the bottom of the corresponding first grid box 22, the second grid box 27 or the third grid box 29, which are used to block the air between the upper and lower adjacent outer cavities 25 and the outer cavity 25 and the tower body 21. The fixed plate 2161 is provided with drainage holes 216 3. A sealing plate 2164 is slidably connected to the support plate 2162. The sealing plate 2164 is used to block the drainage hole 2163. A plurality of elastic members 2165 are installed on the sealing plate 2164. One end of the elastic member 2165 is fixedly connected to the sealing plate 2164, and the other end is fixedly connected to the support plate 2162. The sum of the elastic forces of the plurality of elastic members 2165 on the same group of drainage components 216 is recorded as P. The three groups of drainage components 216 are recorded as P1, P2 and P3 from top to bottom, respectively. P1<P2<P3 can effectively prevent hot air from directly flowing out from the inner cavity 23, drying cavity 24, outer cavity 25 corresponding to the first grille box 22 and the drainage hole 2163 of the lowest drainage component 216 when drying alumina or molecular sieve, thereby ensuring the high efficiency and stability of drying.

[0048] Reference Figure 3 ,picture Figure 8 and Fig. 9A converter box 217 is fixedly installed in the tower body 21, and the converter box 217 is rotatably connected to the tower body 21. The bottom of the converter box 217 is open and communicated with the inside of the tower body 21. The converter box 217 is located directly above the third grid box 29. A guide box 218 is fixedly installed in the converter box 217. The guide box 218 is rotatably connected to the fixed pipe 211 and communicated with each other. The support shaft 2122 passes through the guide box 218 and the fixed pipe 211 and is fixedly connected to the guide box 218. A converter tube 219 is connected to the guide box 218, and the converter tube 219 passes through the converter box 217. The axis height of the converter tube 219 is equal to the axis height of the mouth of the third connecting pipe 9. A converter hole 220 is opened on the converter box 217. The support shaft 2122 drives the converter box 217, the guide box 218 and the converter tube 219 to rotate, thereby controlling the converter tube 219 and the converter hole 220 to switchably connect with the third connecting tube 9, thereby controlling the flow direction of the gas.

[0049] Reference Fig.10 The muffler assembly 32 includes a muffler 321 and a speed reducing tube 322. The speed reducing tube 322 is fixedly installed at the air inlet of the muffler 321 and is connected to each other. The speed reducing tube 322 is connected to the air outlet of the third filter 31. A plurality of baffles 323 are obliquely installed in the speed reducing tube 322. The plurality of baffles 323 are staggered. A pressure relief tube 324 is fixedly installed on the speed reducing tube 322. A partition plate 325 is slidably connected inside the pressure relief tube 324. The partition plate 325 is used to block the internal space of the pressure relief tube 324 from top to bottom. A plurality of elastic bodies 326 are arranged in the pressure relief tube 324. The elastic bodies 326 are provided in the pressure relief tube 324. One end of the body 326 is fixedly connected to the pressure relief pipe 324, and the other end is fixedly connected to the partition plate 325. The interior of the baffle plate 323 is hollow and connected to the interior of the pressure relief pipe 324. A plurality of baffle holes are provided at the bottom of the baffle plate 323. The partition plate 325 is higher than the connection between the baffle plate 323 and the pressure relief pipe 324. A shunt pipe 327 connected to the pressure relief pipe 324 is provided in the speed reduction pipe 322. The shunt pipe 327 is higher than the baffle plate 323. A third one-way valve 328 is installed in the shunt pipe 327 to ensure that the depressurized air can only flow from the pressure relief pipe 324 to the speed reduction pipe 322. After the air enters the deceleration tube 322, it is effectively decelerated by the baffle plate 323, thereby reducing noise and having a certain pressure-maintaining effect, which increases the drying time of the dry gas in the adsorption tower. When the air flow is large, the gas enters the baffle plate 323 and the pressure relief tube 324 from the baffle hole and pushes the partition plate 325 to compress the elastic body 326. When the height of the partition plate 325 is higher than the connecting point of the diverter pipe 327, the gas is quickly diverted from the diverter pipe 327, thereby avoiding excessive air pressure in the adsorption tower.

[0050] The second adsorption tower 3 has the same structure as the first adsorption tower 2 . The air inlet of the second adsorption tower 3 is connected to the second connecting pipe 5 , and the air outlet of the second adsorption tower 3 is connected to the fourth connecting pipe 10 .

[0051] Working principle: The first adsorption tower 2 dries the air, the second adsorption tower 3 dries the internal alumina and molecular sieve, the first pneumatic valve 6, the third pneumatic valve 11, the throttle valve 16, and the sixth pneumatic valve 36 are opened, and the other pneumatic valves are closed. The reversing valve 17 is connected to the eighth connecting pipe 19, and the low-pressure air enters the first adsorption tower 2 after being filtered by the first filter 1. The driving component 212 controls the baffle 2133 to rotate to the top of the guide hole 214, and the reversing hole 220 is connected to the third connecting pipe 9. The low-pressure air is discharged from the bottom guide hole 21 The low-pressure air flows into the second filter 8 from the third connecting pipe 9 after being continuously dried by the alumina and molecular sieve in the drying chamber 24. Most of the dry gas filtered by the second filter 8 flows into the next process, and a small part flows into the heater 14 through the throttle valve 16 for heating.

[0052] The heated gas enters the second adsorption tower 3 through the eighth connecting pipe 19 and the fourth connecting pipe 10. The driving component 212 on the second adsorption tower 3 controls the blocking block 2132 to rotate to the guide hole 214. At this time, the guide hole 214 is blocked, the converter tube 219 is connected with the fourth connecting pipe 10, and the heated air enters the guide box 218 and the fixed pipe 211 from the converter tube 219, and then enters the three groups of guide tubes 2124 respectively and is transported to the corresponding three inner chambers 23. The hot air in the three inner chambers 23 radially passes through the corresponding drying chamber 24 to synchronously dry the alumina or molecular sieve therein, and the dried hot air enters the corresponding outer chamber 25. The hot air in the outer chamber 25 pushes the sealing plate 2164 to compress the elastic member 2165, so that the two upper and lower adjacent outer chambers 25 are connected through the guide hole 2163, and the hot air flows from top to bottom in the plurality of outer chambers 25 and flows from the second connecting pipe 5 to the third filter 31 and the silencer assembly 32 for treatment, and then is discharged.

[0053] After the regeneration of alumina and molecular sieve in the second adsorption tower 3 reaches the set time, the driving component 212 on the second adsorption tower 3 controls the blocking block 2132 to rotate again and disengage from the guide hole 214, so that the baffle 2133 rotates to the top of the guide hole 214. At this time, the exchange hole 220 is connected with the fourth connecting pipe 10, and the hot air in the heater 14 enters the exchange box 217 of the second adsorption tower 3 through the exchange hole 220, and passes through the drying chamber 24 of the third grid box 29, the second isolation box 28, the drying chamber 24 of the second grid box 27, the first isolation box 26, the drying chamber 24 of the first grid box 22 and the third isolation box 210 in sequence, and sequentially regenerates and dries the desiccant in several drying chambers 24. Finally, the hot air flows from the second connecting pipe 5 to the third filter 31 and the silencer component 32 for processing and discharge, thereby realizing that the first adsorption tower 2 continuously dries the low-pressure air, and the second adsorption tower 3 continuously dries the alumina or molecular sieve desiccant, thereby realizing a circulation process.

[0054] The second adsorption tower 3 dries the air, and the first adsorption tower 2 regenerates and dries the internal alumina and molecular sieve in the opposite manner to the above steps, and the process will not be described in detail here.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-pressure air continuous drying device, characterized in that: The first adsorption tower (2) comprises a tower body (21), a first grid box (22) is fixedly mounted in the tower body (21), a first isolation box (26) is fixedly mounted on the top of the first grid box (22), a second grid box (27) is fixedly mounted on the top of the first isolation box (26), a second isolation box (28) is fixedly mounted on the top of the second grid box (27), a third grid box (29) is fixedly mounted on the top of the second isolation box (28), and a third isolation box (210) is fixedly mounted on the bottom of the first grid box (22); The first grid box (22), the second grid box (27) and the third grid box (29) divide the tower body (21) into an inner chamber (23), a drying chamber (24) and an outer chamber (25); A plurality of diversion holes (214) are provided in the first isolation box (26), the second isolation box (28) and the third isolation box (210), and the opening state of the diversion holes (214) is controlled by a blocking component (213); Three groups of drainage components (216) are installed in the tower body (21), and the drainage components (216) are located in the outer cavity (25) and are used to block the air between the upper and lower adjacent outer cavities (25) and between the outer cavity (25) and the tower body (21); By rotating a plurality of blocking components (213), the flow guide holes (214) are controlled to be opened or closed, thereby switching the flow direction of the low-pressure air or hot air entering the tower body (21); The first adsorption tower (2) further comprises a driving assembly (212), the driving assembly (212) comprising a motor (2121), the motor (2121) being fixedly mounted on the tower body (21), the output shaft of the motor (2121) being fixedly connected to a support shaft (2122), the support shaft (2122) being rotatably connected to the tower body (21) and inserted into the inner cavity (23), three groups of separation cylinders (2123) being fixedly mounted on the support shaft (2122), the three groups of separation cylinders (2123) being rotatably connected to the second isolation box (28), the first isolation box (26) and the third isolation box (210) from top to bottom, respectively, the separation cylinders (2123) being used to isolate two groups of inner cavities (23) adjacent to each other in upper and lower directions, and three groups of flow guide pipes (2124) being fixedly mounted on the support shaft (2122); A fixed pipe (211) is fixedly mounted on the third grid box (29); the flow guide pipe (2124) is in communication with the fixed pipe (211) and is located inside the fixed pipe (211); the bottoms of the three groups of flow guide pipes (2124) are respectively inserted into the inner cavity (23) regions corresponding to the first grid box (22), the second grid box (27) and the third grid box (29); The first isolation box (26), the second isolation box (28) and the third isolation box (210) are each provided with a blocking assembly (213), the blocking assembly (213) comprising a fixing frame (2131), the fixing frame (2131) being fixedly connected to a corresponding separation cylinder (2123), a plurality of blocking blocks (2132) being fixedly mounted on the fixing frame (2131), a baffle (2133) being fixedly connected to one side of each blocking block (2132), a plurality of through holes (2134) being provided on the baffle (2133), The drainage assembly (216) comprises a fixing plate (2161) and a supporting plate (2162), wherein the fixing plate (2161) and the supporting plate (2162) are both fixedly mounted in the tower body (21), and the plurality of fixing plates (2161) are at the same height as the bottoms of the corresponding first grid box (22), second grid box (27), and third grid box (29). A drainage hole (2163) is provided on the fixing plate (2161), and a sealing plate (2164) is slidably connected to the supporting plate (2162), wherein the sealing plate (2164) is used to block the drainage hole (2163), and a plurality of elastic members (2165) are mounted on the sealing plate (2164), wherein one end of the elastic member (2165) is fixedly connected to the sealing plate (2164), and the other end is fixedly connected to the supporting plate (2162).

2. A low-pressure air continuous drying device according to claim 1, characterized in that: The bottom surface of the baffle (2133) is higher than the guide hole (214) and is used to disperse the flowing air into the isolation box.

3. The low-pressure air continuous drying equipment according to claim 1, characterized in that: The drying chambers (24) of the first grid box (22) and the third grid box (29) are filled with alumina, and the drying chamber (24) of the second grid box (27) is filled with molecular sieves. The height ratio of the first grid box (22), the second grid box (27) and the third grid box (29) is 6:3:

1.

4. The low-pressure air continuous drying equipment according to claim 1, characterized in that: A top plate (215) is fixedly mounted on the tower body (21) and is used to seal the top of the outer cavity (25) formed by the third grid box (29); The sum of the elastic forces of the three groups of drainage components (216) gradually increases from top to bottom.

5. The low-pressure air continuous drying equipment according to claim 2, characterized in that: A converter box (217) is fixedly installed in the tower body (21), the converter box (217) is rotatably connected to the tower body (21), the bottom of the converter box (217) is open and communicated with the inside of the tower body (21), the converter box (217) is located directly above the third grid box (29), a guide box (218) is fixedly installed in the converter box (217), the guide box (218) is rotatably connected to the fixed pipe (211) and communicated with each other, the support shaft (2122) passes through the guide box (218) and the fixed pipe (211) and is fixedly connected to the guide box (218), a converter tube (219) is arranged on the guide box (218) and communicates with the converter tube (219), the converter tube (219) passes through the converter box (217), and a converter hole (220) is opened on the converter box (217).

6. A low-pressure air continuous drying device according to any one of claims 1 to 5, characterized in that: It also comprises a first filter (1), a second adsorption tower (3), and a second filter (8); the air inlet of the first adsorption tower (2) is connected to the air outlet of the first filter (1) via a first connecting pipe (4); the air inlet of the second adsorption tower (3) is connected to the air outlet of the first filter (1) via a second connecting pipe (5); a first pneumatic valve (6) is installed on the first connecting pipe (4); and a second pneumatic valve (7) is installed on the second connecting pipe (5); The air inlet of the second filter (8) is connected to the air outlet of the first adsorption tower (2) through the third connecting pipe (9), the air inlet of the second filter (8) is connected to the second adsorption tower (3) through the fourth connecting pipe (10), the third connecting pipe (9) is equipped with a third pneumatic valve (11), the fourth connecting pipe (10) is equipped with a fourth pneumatic valve (12), and the air outlet of the second filter (8) is connected to the fifth connecting pipe (13); The second adsorption tower (3) has the same structure as the first adsorption tower (2).

7. A low-pressure air continuous drying device according to claim 6, characterized in that: It also includes a heater (14), the air inlet of the heater (14) is connected to the fifth connecting pipe (13) through a sixth connecting pipe (15), the sixth connecting pipe (15) is installed with a throttle valve (16), the air outlet of the heater (14) is installed with a reversing valve (17), the two air outlets of the reversing valve (17) are respectively connected to a seventh connecting pipe (18) and an eighth connecting pipe (19), the seventh connecting pipe (18) is connected to the air outlet of the first adsorption tower (2), the eighth connecting pipe (19) is connected to the air outlet of the second adsorption tower (3), the seventh connecting pipe (18) is installed with a first one-way valve (20), and the eighth connecting pipe (19) is installed with a second one-way valve (30).

8. The low-pressure air continuous drying equipment according to claim 7, characterized in that: It also includes a third filter (31) and a silencer assembly (32); the silencer assembly (32) is connected to the air outlet of the third filter (31); the air inlet of the first adsorption tower (2) is connected to the air inlet of the third filter (31) via a first return pipe (33); the air inlet of the second adsorption tower (3) is connected to the air inlet of the third filter (31) via a second return pipe (34); a fifth pneumatic valve (35) is installed on the first return pipe (33); and a sixth pneumatic valve (36) is installed on the second return pipe (34).

9. The low-pressure air continuous drying equipment according to claim 8, characterized in that: The muffler assembly (32) comprises a muffler (321) and a speed reducing pipe (322); the speed reducing pipe (322) is fixedly mounted at the air inlet of the muffler (321) and is interconnected; the speed reducing pipe (322) is connected to the air outlet of the third filter (31); a plurality of baffles (323) are obliquely mounted in the speed reducing pipe (322); the baffles (323) are staggeredly distributed; a pressure relief pipe (324) is fixedly mounted on the speed reducing pipe (322); a partition plate (325) is slidably connected to the interior of the pressure relief pipe (324); the partition plate (325) is used to block the internal space of the pressure relief pipe (324) from top to bottom; and a pressure relief pipe (324) is arranged inside the pressure relief pipe (324). A plurality of elastic bodies (326) are arranged, one end of the elastic body (326) is fixedly connected to the pressure relief pipe (324), and the other end is fixedly connected to the partition plate (325); the interior of the baffle plate (323) is hollow and communicates with the interior of the pressure relief pipe (324); a plurality of baffle holes are opened at the bottom of the baffle plate (323); the partition plate (325) is higher than the connection between the baffle plate (323) and the pressure relief pipe (324); a shunt pipe (327) in communication with the pressure relief pipe (324) is arranged in the deceleration pipe (322); the shunt pipe (327) is higher than the baffle plate (323); and a third one-way valve (328) is installed in the shunt pipe (327).

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