CN113637508B

CN113637508B - Rotary valve based on biogas pressure swing adsorption and adsorption method thereof

Info

Publication number: CN113637508B
Application number: CN202110864640.7A
Authority: CN
Inventors: 刘克勇; 王明
Original assignee: Shandong Jinzhi Environmental Protection Technology Co ltd
Current assignee: Shandong Jinzhi Environmental Protection Technology Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2024-04-05
Anticipated expiration: 2041-07-29
Also published as: CN113637508A

Abstract

The invention relates to a rotary valve based on biogas pressure swing adsorption and an adsorption method thereof, wherein the rotary valve comprises: an upper valve, a lower valve, and a support frame for fixing the rotary valve; an upper valve, comprising: the valve comprises an upper valve core, a finished gas discharge hole, a finished gas discharge groove, a first uniform descending hole, a second uniform descending hole, a third uniform descending hole, a first low-pressure constant-pressure hole, a high-pressure constant-pressure hole, a first uniform ascending hole, a second uniform ascending hole, a third uniform ascending hole and a second low-pressure constant-pressure hole; a lower valve, comprising: the device comprises a lower valve core, a product gas inlet hole, a product gas inlet groove, a desorption groove, a vacuum groove, an upper annular groove, a lower annular groove and a sealing ring; a speed reducer is arranged between the upper valve and the lower valve, and the speed reducer is arranged between the upper valve and the lower valve: the power input shaft is coaxially connected with a driving motor, the power output shaft is provided with a coaxial main rotating shaft extending upwards and downwards, and the upper end and the lower end of the main rotating shaft are provided with an upper connecting shaft and a lower connecting shaft. The rotary valve based on biogas pressure swing adsorption and the adsorption method thereof integrate the opening and closing functions of multiple valves, have simple control flow and reduce the consumption of the finished product gas in the desorption process.

Description

Rotary valve based on biogas pressure swing adsorption and adsorption method thereof

Technical Field

The invention relates to the technical field of high-pressure purification of gas, in particular to a rotary valve based on biogas pressure swing adsorption and an adsorption method thereof.

Background

Biogas is a mixed gas produced by organic matters under specific conditions through microbial fermentation. Methane (CH 4), which is the main component (50% -80%) of biogas, and others also include: carbon dioxide (CO) ₂ 20% -40%), nitrogen (N) ₂ 0% -5%), hydrogen (H ₂ < 1%), oxygen (O) ₂ < 0.4%), hydrogen sulfide (H ₂ S, < 0.1% -3%), etc. Wherein, methane (CH 4) is an ideal gas fuel, is colorless and odorless, and can be burnt after being mixed with a proper amount of air; hydrogen sulfide (H) ₂ S) making the marsh gas slightly odorous. Thus, biogas has properties similar to natural gas.

At present, a method for purifying biogas comprises the following steps: absorption method, pressure swing adsorption method, low temperature condensation method, and membrane separation method. The pressure swing adsorption method is most economical and thus is widely used. However, conventional apparatuses employing pressure swing adsorption still suffer from the following disadvantages:

1. the number of valves is large, and the number of fault points is large;

2. the control flow is complex;

3. the desorption process has large consumption of the product gas and poor economy.

Disclosure of Invention

In order to solve the technical problems in the background art, the invention provides the rotary valve based on biogas pressure swing adsorption and the adsorption method thereof, integrates the opening and closing functions of multiple valves, has simple control flow and reduces the consumption of finished gas in the desorption process.

The invention adopts the technical scheme that:

a rotary valve based on biogas pressure swing adsorption, the rotary valve comprising: the upper valve and the lower valve are coaxially arranged, and the rotary valve is fixedly arranged in the supporting frame.

The upper valve includes:

the upper valve core is arranged in a rotating way, a finished gas exhaust hole is formed in the center of the upper end of the upper valve core, and concave finished gas exhaust grooves, first uniform descending holes, second uniform descending holes, third uniform descending holes, first low-pressure constant-pressure holes, high-pressure constant-pressure holes, first uniform ascending holes, second uniform ascending holes, third uniform ascending holes and second low-pressure constant-pressure holes are formed in the upper end of the upper valve core in a circular array with the finished gas exhaust hole as a circle center;

the lower valve includes:

the rotary type rotary pressure-reducing valve comprises a rotary type rotary pressure-reducing valve body, wherein a product air inlet hole is formed in the center of the lower end of the rotary type rotary pressure-reducing valve body, concave product air inlet grooves, desorption grooves and vacuum grooves are formed in the lower end of the rotary pressure-reducing valve body in a circular array mode along the product air inlet hole as a circle center, annular upper annular grooves and annular lower annular grooves are formed in the side walls of the rotary pressure-reducing valve body in a concave mode, and a plurality of sealing rings are arranged on the side walls of the rotary pressure-reducing valve body between the upper annular grooves and the lower annular grooves;

a speed reducer is arranged between the upper valve and the lower valve, a driving motor is coaxially connected at a power input shaft of the speed reducer, a coaxial main rotating shaft is upwardly and downwardly extended at a power output shaft of the speed reducer, and an upper connecting shaft coaxially connected with the lower end of the upper valve core and a lower connecting shaft coaxially connected with the upper end of the lower valve core are arranged at the upper end and the lower end of the main rotating shaft.

Further, the support frame is of a frame structure, an upper fixing plate and a lower fixing plate which are U-shaped are arranged at the upper end and the lower end of the support frame, an upper valve and a lower valve are respectively fixed, and a plurality of reinforcing cross braces are arranged in the middle of the support frame;

the top end of the lower valve is fixedly provided with a mounting rack for mounting a speed reducer;

the power supply end of the driving motor is electrically connected with a frequency converter.

Further, the upper end of the upper valve is provided with an upper sealing plate in sealing connection with the upper end of the upper valve core, a finished product gas discharge pipe is arranged in the center of the upper end of the upper sealing plate in a penetrating mode, the finished product gas discharge pipe is connected to a finished product gas buffer tank, a plurality of upper connecting pipes of the adsorption towers are distributed on the upper end of the upper sealing plate in a circular array mode with the circle center of the finished product gas discharge pipe, the upper connecting pipes of the adsorption towers penetrate through the upper sealing plate and are connected to the top of the adsorption towers, and monitoring pipes are arranged on the outer wall of a valve body of the upper valve in a penetrating mode.

Further, the lower extreme of lower valve is provided with the lower shrouding with lower extreme sealing connection of lower case, the central authorities of lower shrouding lower extreme run through and are provided with the product gas and advance the pipe, the product gas advances the pipe and is connected to product gas buffer tank department, and lower shrouding lower extreme is provided with a plurality of adsorption towers down the connecting pipe for centre of a circle circular array distribution along the product gas advances the pipe, the adsorption tower is the connecting pipe runs through down the shrouding to be connected to adsorption tower bottom department, run through on the valve body outer wall of lower valve and be provided with desorption advance pipe, vacuum calandria, desorption advance pipe, vacuum calandria respectively with last annular, lower annular be linked together.

Further, the number of the upper connecting pipes of the adsorption towers and the number of the lower connecting pipes of the adsorption towers are nine, and the upper connecting pipes of the adsorption towers are arranged right above the lower connecting pipes of the adsorption towers.

Further, the product gas discharge groove spans the connecting pipes on the two adjacent adsorption towers, a first groove inner hole communicated with the high-pressure constant-pressure hole and a second groove inner hole communicated with the product gas discharge hole are arranged in the product gas discharge groove, namely the product gas discharge hole, the product gas discharge groove and the high-pressure constant-pressure hole are communicated;

the first uniform descending hole, the second uniform descending hole, the third uniform descending hole, the first low-pressure constant pressure Kong Yici, the high-pressure constant pressure hole, the first uniform ascending hole, the second uniform ascending hole and the third uniform ascending hole are symmetrically arranged at two sides of the finished gas exhaust groove;

the second low-pressure constant-pressure hole is arranged at the opposite side of the finished gas exhaust groove;

wherein,

the first uniform descending hole is communicated with the first uniform ascending hole;

the second uniform descending hole is communicated with the second uniform ascending hole;

the third uniform descending hole is communicated with the third uniform ascending hole;

the first low-pressure constant-pressure hole is communicated with the second low-pressure constant-pressure hole.

Further, the product gas inlet groove is arranged right below the product gas exhaust groove, and a third groove inner hole communicated with the product gas inlet hole is formed in the product gas inlet groove, namely the product gas inlet hole is communicated with the product gas inlet groove;

The desorption groove and the vacuum groove are arranged on the opposite sides of the product gas inlet groove in parallel, and the desorption groove spans the lower connecting pipes of the two adjacent adsorption towers;

the desorption groove is internally and internally provided with a fourth groove inner hole, the upper annular groove is internally and internally provided with an upper connecting hole, and the fourth groove inner hole is communicated with the upper connecting hole, namely, the desorption groove, the upper annular groove and the desorption inlet pipe are communicated;

the vacuum groove is internally communicated with a fifth groove inner hole, the lower annular groove is internally communicated with a lower connecting hole, and the fifth groove inner hole is communicated with the lower connecting hole, namely, the vacuum groove, the lower annular groove and the vacuum calandria are communicated.

Further, the included angles from the first uniform descending hole, the second uniform descending hole, the third uniform descending hole and the first low-pressure constant-pressure hole to the circle center of the finished gas exhaust hole are 20 degrees;

and the included angles from the high-pressure constant-pressure hole, the first uniform lifting hole, the second uniform lifting hole and the third uniform lifting hole to the circle center of the finished gas exhaust hole are 20 degrees.

The rotary valve adsorption method based on biogas pressure swing adsorption comprises the following steps:

the driving motor rotates, the main rotating shaft is driven by the speed reducer to rotate, meanwhile, the upper connecting shaft and the lower connecting shaft respectively drive the upper valve core and the lower valve core to synchronously rotate, N adsorption towers are arranged in total, and the upper ends and the lower ends of the adsorption towers are respectively communicated with the upper connecting pipe and the lower connecting pipe of the adsorption towers, namely N adsorption tower upper connecting pipes and N adsorption tower lower connecting pipes are respectively arranged;

A0, the product gas inlet groove is positioned at the N and N+1 positions of the connecting pipe below the adsorption tower, and meanwhile, when the product gas exhaust groove is positioned at the N and N+1 positions of the connecting pipe above the adsorption tower:

the N+2 and N+8 positions of the connecting pipe on the adsorption tower are communicated with the first uniform lifting holes through the first uniform lifting holes;

the N+3 th and N+7 th positions of the connecting pipe on the adsorption tower are communicated with the third uniform lifting hole through the third uniform lifting hole;

the N+5 and N+6 positions of the connecting pipe on the adsorption tower pass through the desorption groove, sequentially pass through the inner hole of the fourth groove, the upper connecting hole and the upper annular groove until being communicated with the desorption inlet pipe;

the (n+4) th position of the connecting pipe on the adsorption tower passes through the vacuum groove, and sequentially passes through the inner hole of the fifth groove, the lower connecting hole and the lower annular groove until being communicated with the vacuum calandria;

b0, the product gas inlet groove is positioned at the N and N+1 positions of the connecting pipe below the adsorption tower, meanwhile, the product gas exhaust groove is positioned at the N and N+1 positions of the connecting pipe above the adsorption tower, and when the high-pressure constant-pressure hole is positioned at the N+2 position of the connecting pipe above the adsorption tower:

the N+3 and N+8 positions of the connecting pipe on the adsorption tower are communicated with the second uniform lifting holes through the second uniform lifting holes;

the (n+7) th position of the connecting pipe on the adsorption tower is communicated with the first low-pressure constant-pressure hole;

the N+5 and N+6 positions of the connecting pipe on the adsorption tower pass through the desorption groove, pass through the inner hole of the fourth groove, the upper connecting hole and the upper annular groove in sequence until being communicated with the desorption inlet pipe;

The (n+4) th position of the connecting pipe on the adsorption tower passes through the vacuum groove, sequentially passes through the inner hole of the fifth groove, the lower connecting hole and the lower annular groove until being communicated with the vacuum calandria.

The rotary valve adsorption method based on biogas pressure swing adsorption further comprises the following steps:

the driving motor rotates, the main rotating shaft is driven by the speed reducer to rotate, meanwhile, the upper connecting shaft and the lower connecting shaft respectively drive the upper valve core and the lower valve core to synchronously rotate, nine adsorption towers are arranged, the upper end and the lower end of each adsorption tower are respectively communicated with the upper connecting pipe and the lower connecting pipe of each adsorption tower, and the upper connecting pipe and the lower connecting pipe of each adsorption tower are marked as one to nine according to the rotation directions of the upper valve core and the lower valve core;

a1, when the product gas inlet groove is positioned at the first and second positions of the connecting pipe below the adsorption tower and the product gas exhaust groove is positioned at the first and second positions of the connecting pipe above the adsorption tower, the product gas exhaust groove is positioned at the first and second positions of the connecting pipe:

the third connecting pipe and the ninth connecting pipe on the adsorption tower are communicated with the first uniform lifting hole through the first uniform descending hole;

the fourth connecting pipe and the eighth connecting pipe on the adsorption tower are communicated with the third uniform lifting hole through the third uniform descending hole;

the sixth and seventh connecting pipes on the adsorption tower pass through the desorption groove, pass through the inner hole of the fourth groove, the upper connecting hole and the upper annular groove in sequence until being communicated with the desorption inlet pipe;

The fifth number of the connecting pipe on the adsorption tower passes through the vacuum groove, the inner hole of the fifth groove, the lower connecting hole and the lower annular groove in sequence until being communicated with the vacuum calandria;

b1, the product gas inlet groove is positioned at the first and second positions of the connecting pipe below the adsorption tower, meanwhile, the product gas exhaust groove is positioned at the first and second positions of the connecting pipe on the adsorption tower, and when the high-pressure constant-pressure hole is positioned at the third position of the connecting pipe on the adsorption tower:

the fourth and ninth connecting pipes on the adsorption tower are communicated with the second uniform lifting holes through the second uniform descending holes;

the eighth connecting pipe on the adsorption tower is communicated with the first low-pressure constant-pressure hole;

a2, the product gas inlet groove is positioned at the second and third positions of the connecting pipe below the adsorption tower, and meanwhile, when the product gas exhaust groove is positioned at the second and third positions of the connecting pipe above the adsorption tower:

the fifth and ninth connecting pipes on the adsorption tower are communicated with the third uniform lifting hole through the third uniform descending hole;

the seventh and eighth connecting pipes on the adsorption tower pass through the desorption groove, pass through the inner hole of the fourth groove, the upper connecting hole and the upper annular groove in sequence until being communicated with the desorption inlet pipe;

The sixth connecting pipe on the adsorption tower passes through the vacuum groove, the inner hole of the fifth groove, the lower connecting hole and the lower annular groove in sequence until being communicated with the vacuum calandria;

the first and fourth connecting pipes on the adsorption tower are communicated with the first uniform lifting holes through the first uniform descending holes;

b2, the product gas inlet groove is positioned at the second and third positions of the connecting pipe below the adsorption tower, meanwhile, the product gas exhaust groove is positioned at the second and third positions of the connecting pipe on the adsorption tower, and when the high-pressure constant-pressure hole is positioned at the fourth position of the connecting pipe on the adsorption tower:

the ninth connecting pipe on the adsorption tower is communicated with the first low-pressure constant-pressure hole;

the first and fifth connecting pipes on the adsorption tower are communicated with the second uniform lifting holes through the second uniform descending holes;

a3, when the product gas inlet groove is positioned at the third and fourth positions of the connecting pipe below the adsorption tower and the product gas exhaust groove is positioned at the third and fourth positions of the connecting pipe above the adsorption tower, the product gas exhaust groove is positioned at the third and fourth positions of the connecting pipe:

the eighth and ninth connecting pipes on the adsorption tower pass through the desorption groove, pass through the inner hole of the fourth groove, the upper connecting hole and the upper annular groove in sequence until being communicated with the desorption inlet pipe;

The seventh connecting pipe on the adsorption tower passes through the vacuum groove, the inner hole of the fifth groove, the lower connecting hole and the lower annular groove in sequence until being communicated with the vacuum calandria;

the first and sixth connecting pipes on the adsorption tower are communicated with the third uniform descending hole through the third uniform ascending hole;

the second and fifth connecting pipes on the adsorption tower are communicated with the first uniform lifting holes through the first uniform descending holes;

b3, the product gas inlet groove is positioned at the third and fourth positions of the connecting pipe below the adsorption tower, meanwhile, the product gas exhaust groove is positioned at the third and fourth positions of the connecting pipe on the adsorption tower, and when the high-pressure constant-pressure hole is positioned at the fifth position of the connecting pipe on the adsorption tower:

the second and sixth connecting pipes on the adsorption tower are communicated with the second uniform lifting holes through the second uniform descending holes;

the first number of the connecting pipe on the adsorption tower is communicated with the first low-pressure constant-pressure hole;

a4, the product gas inlet groove is positioned at the fourth and fifth positions of the connecting pipe below the adsorption tower, and meanwhile, when the product gas exhaust groove is positioned at the third and fourth positions of the connecting pipe above the adsorption tower:

The first and the ninth connecting pipes on the adsorption tower pass through the desorption groove, pass through the inner hole of the fourth groove, the upper connecting hole and the upper annular groove in sequence until being communicated with the desorption inlet pipe;

the eighth connecting pipe on the adsorption tower passes through the vacuum groove, the inner hole of the fifth groove, the lower connecting hole and the lower annular groove in sequence until being communicated with the vacuum calandria;

the second and seventh connecting pipes on the adsorption tower are communicated with the third uniform lifting holes through the third uniform descending holes;

the third connecting pipe and the sixth connecting pipe on the adsorption tower are communicated with the first uniform lifting hole through the first uniform descending hole;

b4, the product gas inlet groove is positioned at the fourth and fifth positions of the connecting pipe below the adsorption tower, and meanwhile, when the product gas outlet groove is positioned at the fourth and fifth positions of the connecting pipe on the adsorption tower and the high-pressure constant-pressure hole is positioned at the sixth position of the connecting pipe on the adsorption tower:

the third and seventh connecting pipes on the adsorption tower are communicated with the second uniform lifting holes through the second uniform descending holes;

The second connecting pipe on the adsorption tower is communicated with the first low-pressure constant-pressure hole;

a5, the product gas inlet groove is positioned at the fifth and sixth positions of the connecting pipe below the adsorption tower, and meanwhile, when the product gas exhaust groove is positioned at the fifth and sixth positions of the connecting pipe above the adsorption tower:

the first and second connecting pipes on the adsorption tower pass through the desorption groove, pass through the inner hole of the fourth groove, the upper connecting hole and the upper annular groove in sequence until being communicated with the desorption inlet pipe;

the ninth connecting pipe on the adsorption tower passes through the vacuum groove, the inner hole of the fifth groove, the lower connecting hole and the lower annular groove in sequence until being communicated with the vacuum calandria;

the third and eighth connecting pipes on the adsorption tower are communicated with the third uniform lifting holes through the third uniform lifting holes;

the fourth and seventh connecting pipes on the adsorption tower are communicated with the first uniform lifting holes through the first uniform descending holes;

b5, the product gas inlet groove is positioned at the fifth and sixth positions of the connecting pipe below the adsorption tower, and meanwhile, when the product gas exhaust groove is positioned at the fifth and sixth positions of the connecting pipe on the adsorption tower and the high-pressure constant-pressure hole is positioned at the seventh position of the connecting pipe on the adsorption tower:

The third connecting pipe on the adsorption tower is communicated with the first low-pressure constant-pressure hole;

the fourth connecting pipe and the eighth connecting pipe on the adsorption tower are communicated with the second uniform lifting hole through the second uniform descending hole;

a6, the product gas inlet groove is positioned at the sixth and seventh positions of the connecting pipe below the adsorption tower, and meanwhile, when the product gas outlet groove is positioned at the sixth and seventh positions of the connecting pipe above the adsorption tower:

the second and third connecting pipes on the adsorption tower pass through the desorption groove, pass through the inner hole of the fourth groove, the upper connecting hole and the upper annular groove in sequence until being communicated with the desorption inlet pipe;

the first number of the connecting pipe on the adsorption tower passes through the vacuum groove, the inner hole of the fifth groove, the lower connecting hole and the lower annular groove in sequence until being communicated with the vacuum calandria;

the fourth and ninth connecting pipes on the adsorption tower are communicated with the third uniform lifting hole through the third uniform descending hole;

the fifth connecting pipe and the eighth connecting pipe on the adsorption tower are communicated with the first uniform lifting hole through the first uniform descending hole;

b6, the product gas inlet groove is positioned at the sixth and seventh positions of the connecting pipe below the adsorption tower, and meanwhile, when the product gas outlet groove is positioned at the sixth and seventh positions of the connecting pipe on the adsorption tower and the high-pressure constant-pressure hole is positioned at the eighth position of the connecting pipe on the adsorption tower:

The fifth and ninth connecting pipes on the adsorption tower are communicated with the second uniform lifting holes through the second uniform descending holes;

the fourth connecting pipe on the adsorption tower is communicated with the first low-pressure constant-pressure hole;

a7, the product gas inlet groove is positioned at the seventh and eighth positions of the connecting pipe below the adsorption tower, and meanwhile, when the product gas exhaust groove is positioned at the seventh and eighth positions of the connecting pipe above the adsorption tower:

the third and fourth connecting pipes on the adsorption tower pass through the desorption groove and sequentially pass through the inner hole of the fourth groove, the upper connecting hole and the upper annular groove until being communicated with the desorption inlet pipe;

the second number of the connecting pipe on the adsorption tower passes through the vacuum groove, the inner hole of the fifth groove, the lower connecting hole and the lower annular groove in sequence until being communicated with the vacuum calandria;

the first and fifth connecting pipes on the adsorption tower are communicated with the third uniform lifting hole through the third uniform descending hole;

the sixth and ninth connecting pipes on the adsorption tower are communicated with the first uniform lifting holes through the first uniform descending holes;

B7, the product gas inlet groove is positioned at the seventh and eighth positions of the connecting pipe below the adsorption tower, and meanwhile, when the product gas exhaust groove is positioned at the seventh and eighth positions of the connecting pipe on the adsorption tower and the high-pressure constant-pressure hole is positioned at the ninth position of the connecting pipe on the adsorption tower:

the first and sixth connecting pipes on the adsorption tower are communicated with the second uniform lifting holes through the second uniform descending holes;

the fifth connecting pipe on the adsorption tower is communicated with the first low-pressure constant-pressure hole;

a8, the product gas inlet groove is positioned at the eighth and ninth positions of the connecting pipe below the adsorption tower, and meanwhile, when the product gas exhaust groove is positioned at the eighth and ninth positions of the connecting pipe above the adsorption tower:

the fourth and fifth connecting pipes on the adsorption tower pass through the desorption groove, pass through the inner hole of the fourth groove, the upper connecting hole and the upper annular groove in sequence until being communicated with the desorption inlet pipe;

the third number of the connecting pipe on the adsorption tower passes through the vacuum groove, the inner hole of the fifth groove, the lower connecting hole and the lower annular groove in sequence until being communicated with the vacuum calandria;

The second and sixth connecting pipes on the adsorption tower are communicated with the third uniform lifting hole through the third uniform descending hole;

the first and seventh connecting pipes on the adsorption tower are communicated with the first uniform lifting holes through the first uniform descending holes;

b8, the product gas inlet groove is positioned at the eighth and ninth positions of the connecting pipe below the adsorption tower, and meanwhile, when the product gas exhaust groove is positioned at the eighth and ninth positions of the connecting pipe on the adsorption tower and the high-pressure constant-pressure hole is positioned at the first position of the connecting pipe on the adsorption tower:

the second and seventh connecting pipes on the adsorption tower are communicated with the second uniform lifting holes through the second uniform descending holes;

the sixth connecting pipe on the adsorption tower is communicated with the first low-pressure constant-pressure hole;

a9, when the product gas inlet groove is positioned at the first and ninth positions of the connecting pipe below the adsorption tower and the product gas exhaust groove is positioned at the first and ninth positions of the connecting pipe above the adsorption tower, the product gas exhaust groove is positioned at the first and ninth positions of the connecting pipe:

the fifth and sixth connecting pipes on the adsorption tower pass through the desorption groove, pass through the inner hole of the fourth groove, the upper connecting hole and the upper annular groove in sequence until being communicated with the desorption inlet pipe;

The fourth connecting pipe on the adsorption tower passes through the vacuum groove, the inner hole of the fifth groove, the lower connecting hole and the lower annular groove in sequence until being communicated with the vacuum calandria;

the third and seventh connecting pipes on the adsorption tower are communicated with the third uniform lifting holes through the third uniform lifting holes;

the second connecting pipe and the eighth connecting pipe on the adsorption tower are communicated with the first uniform lifting hole through the first uniform descending hole;

b9, when the product gas inlet groove is positioned at the first and ninth positions of the connecting pipe below the adsorption tower, the product gas exhaust groove is positioned at the first and ninth positions of the connecting pipe on the adsorption tower, and the high-pressure constant-pressure hole is positioned at the second position of the connecting pipe on the adsorption tower:

the third connecting pipe and the eighth connecting pipe on the adsorption tower are communicated with the second uniform descending hole through the second uniform ascending hole;

the seventh connecting pipe on the adsorption tower is communicated with the first low-pressure constant-pressure hole;

the fourth connecting pipe on the adsorption tower passes through the vacuum groove, the inner hole of the fifth groove, the lower connecting hole and the lower annular groove in sequence until being communicated with the vacuum calandria.

The rotary valve based on biogas pressure swing adsorption and the adsorption method and demonstration method thereof have the advantages that:

1. The rotary valve replaces a plurality of opening and closing valves in conventional equipment, so that fault points are reduced, and safety is improved;

2. the valve core rotating speed of the rotary valve is used for adjusting the period of each flow in the purification process, and the flow is simple;

3. the desorption is carried out in a self-pressure relief and vacuum mode, so that the consumption of the finished product gas in the desorption process is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, and the drawings in the following description are embodiments of the present invention.

FIG. 1 is a general perspective view of an example of the present invention providing a rotary valve based on biogas pressure swing adsorption;

FIG. 2 is a schematic perspective view of an upper spool of a rotary valve based on biogas pressure swing adsorption in accordance with an example of the present invention;

FIG. 3 is a schematic top view of an upper spool of a rotary valve based on biogas pressure swing adsorption in accordance with an example of the present invention;

FIG. 4 is a schematic perspective view of a lower spool of a rotary valve based on biogas pressure swing adsorption in accordance with an example of the present invention;

fig. 5 is a schematic bottom view of a lower spool of a rotary valve based on biogas pressure swing adsorption in accordance with an example of the present invention.

In the figure:

10. a supporting frame 11, an upper fixing plate 12, a lower fixing plate 13, a reinforcing cross brace 14 and a mounting frame,

20. Upper valve, 200, upper valve core, 201, product gas discharge hole, 202, product gas discharge groove, 2021, first groove inner hole, 2022, second groove inner hole, 203-A, first uniform drop hole, 203-B, second uniform drop hole, 203-C, third uniform drop hole, 204, first low pressure constant pressure hole, 205, high pressure constant pressure hole, 206-A, first uniform rise hole, 206-B, second uniform rise hole, 206-C, third uniform rise hole, 207, second low pressure constant pressure hole,

21. an upper sealing plate 22, a finished product gas discharge pipe 23, an upper connecting pipe of the adsorption tower 24 and a monitoring pipe,

30. 31, a speed reducer 32, a driving motor 33, a main rotating shaft 34, an upper connecting shaft 35 and a lower connecting shaft,

40. lower valve 400, lower valve core 401, product gas inlet hole 402, product gas inlet groove 4021, third groove inner hole 403, desorption groove 4031, fourth groove inner hole 404, vacuum groove 4041, fifth groove inner hole 405, upper ring groove 4051, upper connecting hole 406, lower ring groove 4061, lower connecting hole 407, sealing ring,

41. lower sealing plate, 42, product gas inlet pipe, 43, adsorption tower lower connecting pipe, 44, desorption inlet pipe, 45 and vacuum calandria.

Detailed Description

In order to more clearly and clearly describe the specific implementation objects and embodiments of the present invention, the following description will fully describe the technical solutions of the present invention, and the described embodiments are some, but not all, embodiments of the present invention. All other embodiments based on the described embodiments of the invention fall within the scope of the invention without making inventive efforts.

The invention relates to a rotary valve based on biogas pressure swing adsorption, as shown in figure 1, which comprises: the upper valve 20 and the lower valve 40 are coaxially arranged, and the rotary valve is fixedly arranged in the support frame 10.

The support frame 10 is of a frame structure, an upper fixing plate 11 and a lower fixing plate 12 which are U-shaped are arranged at the upper end and the lower end of the support frame 10, an upper valve 20 and a lower valve 40 are respectively fixed, and a plurality of reinforcing cross braces 13 are arranged in the middle of the support frame 10; the top end of the lower valve 40 is fixedly provided with a mounting rack 14 for mounting the speed reducer 31;

as shown in fig. 1, the upper end of the upper valve 20 is provided with an upper sealing plate 21 in sealing connection with the upper end of the upper valve core 200, a finished product gas discharge pipe 22 is arranged in the center of the upper end of the upper sealing plate 21 in a penetrating manner, the finished product gas discharge pipe 22 is connected to a finished product gas buffer tank, nine adsorption tower upper connecting pipes 23 are arranged at the upper end of the upper sealing plate 21 in a circular array with the center of the finished product gas discharge pipe 22, the adsorption tower upper connecting pipes 23 penetrate through the upper sealing plate 21 and are connected to the top of the adsorption tower, and monitoring pipes 24 are arranged on the outer wall of the valve body of the upper valve 20 in a penetrating manner. The upper valve 20, as shown in fig. 2 and 3, includes:

the upper valve core 200 is rotatably arranged, a finished gas exhaust hole 201 is arranged in the center of the upper end of the upper valve core 200, and concave finished gas exhaust grooves 202, first uniform descending holes 203-A, second uniform descending holes 203-B, third uniform descending holes 203-C, first low pressure constant pressure holes 204, high pressure constant pressure holes 205, first uniform ascending holes 206-A, second uniform ascending holes 206-B, third uniform ascending holes 206-C and second low pressure constant pressure holes 207 are distributed on the upper end of the upper valve core 200 along a circular array with the finished gas exhaust hole 201 as a center. The product gas discharging groove 202 spans the connecting pipes 23 on two adjacent adsorption towers, and a first groove inner hole 2021 communicated with the high-pressure constant-pressure hole 205 and a second groove inner hole 2022 communicated with the product gas discharging hole 201 are arranged in the product gas discharging groove 202, namely the product gas discharging hole 201, the product gas discharging groove 202 and the high-pressure constant-pressure hole 205 are communicated. The included angle from the first uniform descending hole 203-A, the second uniform descending hole 203-B, the third uniform descending hole 203-C and the first low pressure constant pressure hole 204 to the circle center of the finished gas exhaust hole 201 is 20 degrees; the included angles from the high-pressure constant-pressure hole 205, the first uniform lifting hole 206-a, the second uniform lifting hole 206-B and the third uniform lifting hole 206-C to the center of the product gas exhaust hole 201 are 20 degrees, and the first uniform descending hole 203-a, the second uniform descending hole 203-B, the third uniform descending hole 203-C and the first low-pressure constant-pressure hole 204 are symmetrically arranged on two sides of the product gas exhaust groove 202 in sequence with the high-pressure constant-pressure hole 205, the first uniform lifting hole 206-a, the second uniform lifting hole 206-B and the third uniform lifting hole 206-C. The second low-pressure constant-pressure hole 207 is provided on the opposite side of the product gas discharge tank 202. Wherein the first uniform descending hole 203-A is communicated with the first uniform ascending hole 206-A; the second uniform descending hole 203-B is communicated with the second uniform ascending hole 206-B; the third uniform descending hole 203-C is communicated with the third uniform ascending hole 206-C; the first low-pressure constant-pressure hole 204 communicates with the second low-pressure constant-pressure hole 207.

As shown in fig. 1, the lower end of the lower valve 40 is provided with a lower sealing plate 41 in sealing connection with the lower end of the lower valve core 400, a product air inlet pipe 42 is arranged in the center of the lower end of the lower sealing plate 41 in a penetrating manner, the product air inlet pipe 42 is connected to a product air buffer tank, nine lower connecting pipes 43 of the adsorption tower are distributed in a circular array with the product air inlet pipe 42 as the center of the circle, the lower connecting pipes 43 of the adsorption tower penetrate through the lower sealing plate 41 and are connected to the bottom of the adsorption tower, the nine lower connecting pipes 43 of the adsorption tower are respectively arranged under the upper connecting pipes 23 of the nine adsorption towers, a desorption inlet pipe 44 and a vacuum exhaust pipe 45 are arranged on the outer wall of the valve body of the lower valve 40 in a penetrating manner, and the desorption inlet pipe 44 and the vacuum exhaust pipe 45 are respectively communicated with the upper annular groove 405 and the lower annular groove 406. The lower valve 40, as shown in fig. 4 and 5, includes:

the rotary lower valve core 400 is provided with a product gas inlet hole 401 in the center of the lower end of the lower valve core 400, concave product gas inlet grooves 402, desorption grooves 403 and vacuum grooves 404 are distributed on the lower end of the lower valve core 400 along a circular array with the product gas inlet hole 401 as a circle center, annular upper annular grooves 405 and lower annular grooves 406 are concavely arranged on the side walls of the lower valve core 400, and a plurality of sealing rings 407 are arranged on the side walls of the lower valve core 400 between the upper annular grooves 405 and the lower annular grooves 406. The product gas inlet groove 402 is disposed right below the product gas exhaust groove 202, and a third groove inner hole 4021 connected with the product gas inlet hole 401 is disposed in the product gas inlet groove 402, that is, the product gas inlet hole 401 and the product gas inlet groove 402 are connected. The desorption tank 403 and the vacuum tank 404 are arranged on the opposite sides of the product gas inlet tank 402 in parallel, and the desorption tank 403 spans the two adjacent lower connecting pipes 43 of the adsorption towers. The desorption groove 403 is internally and continuously provided with a fourth groove inner hole 4031, the upper ring groove 405 is internally and continuously provided with an upper connecting hole 4051, and the fourth groove inner hole 4031 is communicated with the upper connecting hole 4051, namely, the desorption groove 403, the upper ring groove 405 and the desorption inlet pipe 44 are communicated. The vacuum groove 404 is internally and continuously provided with a fifth groove inner hole 4041, the lower ring groove 406 is internally and continuously provided with a lower connecting hole 4061, and the fifth groove inner hole 4041 is communicated with the lower connecting hole 4061, namely, the vacuum groove 404, the lower ring groove 406 and the vacuum drain 45 are communicated.

A speed reducer 31 is arranged between the upper valve 20 and the lower valve 40, a driving motor 32 is coaxially connected at a power input shaft of the speed reducer 31, a frequency converter is electrically connected at a power supply end of the driving motor 32, a coaxial main rotating shaft 33 is upwardly and downwardly extended at a power output shaft of the speed reducer 31, and an upper connecting shaft 34 coaxially connected with the lower end of the upper valve core 200 and a lower connecting shaft 35 coaxially connected with the upper end of the lower valve core 400 are arranged at the upper end and the lower end of the main rotating shaft 33.

According to the specific structure of the rotary valve embodiment based on biogas pressure swing adsorption, a rotary valve adsorption method based on biogas pressure swing adsorption is further described below:

the driving motor 32 rotates, the main rotating shaft 33 is driven to rotate by the speed reducer 31, meanwhile, the upper connecting shaft 34 and the lower connecting shaft 35 respectively drive the upper valve core 200 and the lower valve core 400 to synchronously rotate, N adsorption towers are arranged, the upper ends and the lower ends of the adsorption towers are respectively communicated with the upper connecting pipe 23 and the lower connecting pipe 43 of the adsorption towers, namely N adsorption tower upper connecting pipes 23 and N adsorption tower lower connecting pipes 43 are respectively arranged;

a0, the product gas inlet 402 is located at the N and N+1 positions of the connecting pipe 43 below the adsorption tower, and meanwhile, when the product gas exhaust 202 is located at the N and N+1 positions of the connecting pipe 23 above the adsorption tower:

The N+2 and N+8 positions of the connecting pipe 23 on the adsorption tower are communicated with the first uniform lifting hole 206-A through the first uniform lifting hole 203-A;

the (n+3) th and (n+7) th positions of the connecting pipe 23 on the adsorption tower are communicated with the third uniform lifting hole 206-C through the third uniform lifting hole 203-C;

the (n+5) th and (n+6) th positions of the upper connecting pipe 23 of the adsorption tower pass through the desorption groove 403, pass through the inner hole 4031 of the fourth groove, the upper connecting hole 4051 and the upper annular groove 405 in sequence until being communicated with the desorption inlet pipe 44;

the (n+4) th position of the connecting pipe 23 on the adsorption tower passes through the vacuum groove 404, sequentially passes through the inner hole 4041 of the fifth groove, the lower connecting hole 4061 and the lower ring groove 406 until being communicated with the vacuum exhaust pipe 45;

b0, the product gas inlet 402 is located at the nth and n+1 positions of the lower connecting pipe 43 of the adsorption tower, meanwhile, the product gas outlet 202 is located at the nth and n+1 positions of the upper connecting pipe 23 of the adsorption tower, and the high-pressure constant-pressure hole 205 is located at the n+2 position of the upper connecting pipe 23 of the adsorption tower:

the N+3 and N+8 positions of the connecting pipe 23 on the adsorption tower are communicated with the second uniform lifting hole 206-B through the second uniform lifting hole 203-B;

the (n+7) th position of the connecting pipe 23 on the adsorption tower is communicated with the first low-pressure constant-pressure hole 204;

the positions of the n+5 and n+6 of the connecting pipe 23 on the adsorption tower pass through the desorption groove 403, pass through the inner hole 4031 of the fourth groove, the upper connecting hole 4051 and the upper annular groove 405 in sequence until being communicated with the desorption inlet pipe 44;

The (n+4) th position of the connecting pipe 23 on the adsorption tower passes through the vacuum groove 404, the fifth groove inner hole 4041, the lower connecting hole 4061 and the lower ring groove 406 in sequence until being communicated with the vacuum drain pipe 45.

The n+m position above, wherein:

when N+M is less than or equal to 9, the position of the (N+M) th is represented by adopting an N+M mode;

when N+M is greater than 9, the position of the N+M is represented by N+M-9.

In combination with the rotary valve adsorption method based on biogas pressure swing adsorption in the above embodiment, the rotary valve adsorption method based on biogas pressure swing adsorption will be described in detail below:

the driving motor 32 rotates, the main rotating shaft 33 is driven to rotate by the speed reducer 31, meanwhile, the upper connecting shaft 34 and the lower connecting shaft 35 respectively drive the upper valve core 200 and the lower valve core 400 to synchronously rotate, nine adsorption towers are arranged, the upper end and the lower end of each adsorption tower are respectively communicated with the upper connecting pipe 23 and the lower connecting pipe 43 of each adsorption tower, and the upper connecting pipe 23 and the lower connecting pipe 43 of each adsorption tower are marked as one to nine according to the rotation directions of the upper valve core 200 and the lower valve core 400;

a1, the product gas inlet groove 402 is positioned at the first and second positions of the connecting pipe 43 under the adsorption tower, and meanwhile, when the product gas discharge groove 202 is positioned at the first and second positions of the connecting pipe 23 on the adsorption tower:

The third and ninth connecting pipes 23 on the adsorption tower are communicated with the first uniform lifting hole 206-A through the first uniform lifting hole 203-A;

the fourth and eighth connecting pipes 23 on the adsorption tower are communicated with the third uniform lifting holes 206-C through the third uniform lifting holes 203-C;

the sixth and seventh connecting pipes 23 on the adsorption tower pass through the desorption groove 403, pass through the inner hole 4031 of the fourth groove, the upper connecting hole 4051 and the upper ring groove 405 in sequence until being communicated with the desorption inlet pipe 44;

the fifth number of the connecting pipe 23 on the adsorption tower passes through the vacuum groove 404, sequentially passes through the inner hole 4041 of the fifth groove, the lower connecting hole 4061 and the lower ring groove 406 until being communicated with the vacuum calandria 45;

b1, the product gas inlet groove 402 is positioned at the first and second positions of the connecting pipe 43 under the adsorption tower, meanwhile, the product gas exhaust groove 202 is positioned at the first and second positions of the connecting pipe 23 on the adsorption tower, and the high-pressure constant-pressure hole 205 is positioned at the third position of the connecting pipe 23 on the adsorption tower:

the fourth and ninth connecting pipes 23 on the adsorption tower are communicated with the second uniform lifting holes 206-B through the second uniform lifting holes 203-B;

the eighth connecting pipe 23 on the adsorption tower is communicated with the first low-pressure constant-pressure hole 204;

a2, the product gas inlet groove 402 is positioned at the second and third positions of the connecting pipe 43 under the adsorption tower, and meanwhile, when the product gas discharge groove 202 is positioned at the second and third positions of the connecting pipe 23 on the adsorption tower:

the fifth and ninth connecting pipes 23 on the adsorption tower are communicated with the third uniform lifting hole 206-C through the third uniform lifting hole 203-C;

the seventh and eighth connecting pipes 23 on the adsorption tower pass through the desorption groove 403, pass through the inner hole 4031 of the fourth groove, the upper connecting hole 4051 and the upper ring groove 405 in sequence until being communicated with the desorption inlet pipe 44;

the sixth number of the connecting pipe 23 on the adsorption tower passes through the vacuum groove 404, sequentially passes through the inner hole 4041 of the fifth groove, the lower connecting hole 4061 and the lower ring groove 406 until being communicated with the vacuum calandria 45;

the first and fourth connecting pipes 23 on the adsorption tower are communicated with the first uniform lifting hole 206-A through the first uniform lifting hole 203-A;

b2, the product gas inlet groove 402 is positioned at the second and third positions of the connecting pipe 43 under the adsorption tower, meanwhile, the product gas exhaust groove 202 is positioned at the second and third positions of the connecting pipe 23 on the adsorption tower, and the high-pressure constant-pressure hole 205 is positioned at the fourth position of the connecting pipe 23 on the adsorption tower:

A ninth connecting pipe 23 on the adsorption tower is communicated with the first low-pressure constant-pressure hole 204;

the first and fifth connecting pipes 23 on the adsorption tower are communicated with the second uniform lifting holes 206-B through the second uniform lifting holes 203-B;

a3, the product gas inlet groove 402 is positioned at the third and fourth positions of the connecting pipe 43 under the adsorption tower, and meanwhile, when the product gas discharge groove 202 is positioned at the third and fourth positions of the connecting pipe 23 on the adsorption tower:

the eighth and ninth connecting pipes 23 on the adsorption tower pass through the desorption groove 403, pass through the inner hole 4031 of the fourth groove, the upper connecting hole 4051 and the upper ring groove 405 in sequence until being communicated with the desorption inlet pipe 44;

the seventh number of the connecting pipe 23 on the adsorption tower passes through the vacuum groove 404, sequentially passes through the inner hole 4041 of the fifth groove, the lower connecting hole 4061 and the lower ring groove 406 until being communicated with the vacuum calandria 45;

the first and sixth connecting pipes 23 on the adsorption tower are communicated with the third uniform lifting hole 206-C through the third uniform lifting hole 203-C;

The second and fifth connecting pipes 23 on the adsorption tower are communicated with the first uniform lifting hole 206-A through the first uniform lifting hole 203-A;

b3, the product gas inlet groove 402 is positioned at the third and fourth positions of the connecting pipe 43 under the adsorption tower, meanwhile, the product gas exhaust groove 202 is positioned at the third and fourth positions of the connecting pipe 23 on the adsorption tower, and the high-pressure constant-pressure hole 205 is positioned at the fifth position of the connecting pipe 23 on the adsorption tower:

the second and sixth connecting pipes 23 on the adsorption tower are communicated with the second uniform lifting holes 206-B through the second uniform lifting holes 203-B;

the first number of the connecting pipe 23 on the adsorption tower is communicated with the first low-pressure constant-pressure hole 204;

a4, the product gas inlet groove 402 is positioned at the fourth and fifth positions of the connecting pipe 43 under the adsorption tower, and meanwhile, when the product gas discharge groove 202 is positioned at the third and fourth positions of the connecting pipe 23 on the adsorption tower:

the first and ninth numbers of the connecting pipe 23 on the adsorption tower pass through the desorption groove 403, pass through the inner hole 4031 of the fourth groove, the upper connecting hole 4051 and the upper ring groove 405 in sequence until being communicated with the desorption inlet pipe 44;

The eighth connecting pipe 23 on the adsorption tower passes through the vacuum groove 404, the fifth groove inner hole 4041, the lower connecting hole 4061 and the lower ring groove 406 in sequence until being communicated with the vacuum calandria 45;

the second and seventh connecting pipes 23 on the adsorption tower are communicated with the third uniform lifting hole 206-C through the third uniform lifting hole 203-C;

the third and sixth connecting pipes 23 on the adsorption tower are communicated with the first uniform lifting holes 206-A through the first uniform lifting holes 203-A;

b4, the product gas inlet groove 402 is positioned at the fourth and fifth positions of the connecting pipe 43 under the adsorption tower, and meanwhile, when the product gas exhaust groove 202 is positioned at the fourth and fifth positions of the connecting pipe 23 on the adsorption tower and the high-pressure constant-pressure hole 205 is positioned at the sixth position of the connecting pipe 23 on the adsorption tower:

the third and seventh connecting pipes 23 on the adsorption tower are communicated with the second uniform lifting holes 206-B through the second uniform lifting holes 203-B;

the second connecting pipe 23 on the adsorption tower is communicated with the first low-pressure constant-pressure hole 204;

A5, the product gas inlet groove 402 is positioned at the fifth and sixth positions of the connecting pipe 43 below the adsorption tower, and meanwhile, when the product gas discharge groove 202 is positioned at the fifth and sixth positions of the connecting pipe 23 above the adsorption tower:

the first and second connecting pipes 23 on the adsorption tower pass through the desorption groove 403, pass through the inner hole 4031 of the fourth groove, the upper connecting hole 4051 and the upper ring groove 405 in sequence until being communicated with the desorption inlet pipe 44;

the ninth connecting pipe 23 on the adsorption tower passes through the vacuum groove 404, the inner hole 4041 of the fifth groove, the lower connecting hole 4061 and the lower ring groove 406 in sequence until being communicated with the vacuum calandria 45;

the third and eighth connecting pipes 23 on the adsorption tower are communicated with the third uniform lifting holes 206-C through third uniform lifting holes 203-C;

fourth and seventh connecting pipes 23 on the adsorption tower are communicated with the first uniform lifting holes 206-A through the first uniform lifting holes 203-A;

b5, the product gas inlet groove 402 is positioned at the fifth and sixth positions of the connecting pipe 43 under the adsorption tower, and meanwhile, when the product gas exhaust groove 202 is positioned at the fifth and sixth positions of the connecting pipe 23 on the adsorption tower and the high-pressure constant-pressure hole 205 is positioned at the seventh position of the connecting pipe 23 on the adsorption tower:

The third connecting pipe 23 on the adsorption tower is communicated with the first low-pressure constant-pressure hole 204;

the fourth and eighth connecting pipes 23 on the adsorption tower are communicated with the second uniform lifting holes 206-B through the second uniform lifting holes 203-B;

a6, the product gas inlet groove 402 is positioned at the sixth and seventh positions of the connecting pipe 43 below the adsorption tower, and meanwhile, when the product gas exhaust groove 202 is positioned at the sixth and seventh positions of the connecting pipe 23 above the adsorption tower:

the second and third connecting pipes 23 on the adsorption tower pass through the desorption groove 403, pass through the inner hole 4031 of the fourth groove, the upper connecting hole 4051 and the upper ring groove 405 in sequence until being communicated with the desorption inlet pipe 44;

the first number of the connecting pipe 23 on the adsorption tower passes through the vacuum groove 404, sequentially passes through the inner hole 4041 of the fifth groove, the lower connecting hole 4061 and the lower ring groove 406 until being communicated with the vacuum exhaust pipe 45;

the fourth and ninth connecting pipes 23 on the adsorption tower are communicated with the third uniform lifting hole 206-C through the third uniform lifting hole 203-C;

fifth and eighth connecting pipes 23 on the adsorption tower are communicated with the first uniform lifting holes 206-A through the first uniform lifting holes 203-A;

b6, the product gas inlet groove 402 is positioned at the sixth and seventh positions of the connecting pipe 43 under the adsorption tower, and meanwhile, when the product gas exhaust groove 202 is positioned at the sixth and seventh positions of the connecting pipe 23 on the adsorption tower and the high-pressure constant-pressure hole 205 is positioned at the eighth position of the connecting pipe 23 on the adsorption tower:

The fifth and ninth connecting pipes 23 on the adsorption tower are communicated with the second uniform lifting holes 206-B through the second uniform lifting holes 203-B;

a fourth connecting pipe 23 on the adsorption tower is communicated with the first low-pressure constant-pressure hole 204;

a7, the product gas inlet groove 402 is positioned at the seventh and eighth positions of the connecting pipe 43 below the adsorption tower, and meanwhile, when the product gas discharge groove 202 is positioned at the seventh and eighth positions of the connecting pipe 23 above the adsorption tower:

the third and fourth connecting pipes 23 on the adsorption tower pass through the desorption groove 403, pass through the inner hole 4031 of the fourth groove, the upper connecting hole 4051 and the upper ring groove 405 in sequence until being communicated with the desorption inlet pipe 44;

the second number of the connecting pipe 23 on the adsorption tower passes through the vacuum groove 404, sequentially passes through the inner hole 4041 of the fifth groove, the lower connecting hole 4061 and the lower ring groove 406 until being communicated with the vacuum exhaust pipe 45;

the first and fifth connecting pipes 23 on the adsorption tower are communicated with the third uniform lifting hole 206-C through the third uniform lifting hole 203-C;

The sixth and ninth connecting pipes 23 on the adsorption tower are communicated with the first uniform lifting hole 206-A through the first uniform lifting hole 203-A;

b7, the product gas inlet groove 402 is positioned at the seventh and eighth positions of the connecting pipe 43 under the adsorption tower, and meanwhile, when the product gas discharge groove 202 is positioned at the seventh and eighth positions of the connecting pipe 23 on the adsorption tower and the high-pressure constant-pressure hole 205 is positioned at the ninth position of the connecting pipe 23 on the adsorption tower:

the first and sixth connecting pipes 23 on the adsorption tower are communicated with the second uniform lifting holes 206-B through the second uniform lifting holes 203-B;

the fifth connecting pipe 23 on the adsorption tower is communicated with the first low-pressure constant-pressure hole 204;

a8, the product gas inlet groove 402 is positioned at the eighth and ninth positions of the connecting pipe 43 under the adsorption tower, and meanwhile, when the product gas discharge groove 202 is positioned at the eighth and ninth positions of the connecting pipe 23 on the adsorption tower:

the fourth and fifth connecting pipes 23 on the adsorption tower pass through the desorption groove 403, pass through the inner hole 4031 of the fourth groove, the upper connecting hole 4051 and the upper ring groove 405 in sequence until being communicated with the desorption inlet pipe 44;

The third number of the connecting pipe 23 on the adsorption tower passes through the vacuum groove 404, sequentially passes through the inner hole 4041 of the fifth groove, the lower connecting hole 4061 and the lower ring groove 406 until being communicated with the vacuum calandria 45;

the second and sixth connecting pipes 23 on the adsorption tower are communicated with the third uniform lifting hole 206-C through the third uniform lifting hole 203-C;

the first and seventh connecting pipes 23 on the adsorption tower are communicated with the first uniform lifting holes 206-A through the first uniform lifting holes 203-A;

b8, the product gas inlet groove 402 is positioned at the eighth and ninth positions of the connecting pipe 43 under the adsorption tower, and meanwhile, when the product gas discharge groove 202 is positioned at the eighth and ninth positions of the connecting pipe 23 on the adsorption tower and the high-pressure constant-pressure hole 205 is positioned at the first position of the connecting pipe 23 on the adsorption tower:

the second and seventh connecting pipes 23 on the adsorption tower are communicated with the second uniform lifting holes 206-B through the second uniform lifting holes 203-B;

a sixth connecting pipe 23 on the adsorption tower is communicated with the first low-pressure constant-pressure hole 204;

A9, the product gas inlet groove 402 is positioned at the first and ninth positions of the connecting pipe 43 under the adsorption tower, and meanwhile, when the product gas discharge groove 202 is positioned at the first and ninth positions of the connecting pipe 23 on the adsorption tower:

fifth and sixth connecting pipes 23 on the adsorption tower pass through the desorption groove 403, pass through the inner hole 4031 of the fourth groove, the upper connecting hole 4051 and the upper ring groove 405 in sequence until being communicated with the desorption inlet pipe 44;

the fourth number of the connecting pipe 23 on the adsorption tower passes through the vacuum groove 404, sequentially passes through the inner hole 4041 of the fifth groove, the lower connecting hole 4061 and the lower ring groove 406 until being communicated with the vacuum calandria 45;

the third and seventh connecting pipes 23 on the adsorption tower are communicated with the third uniform lifting hole 206-C through the third uniform lifting hole 203-C;

the second and eighth connecting pipes 23 on the adsorption tower are communicated with the first uniform lifting holes 206-A through the first uniform lifting holes 203-A;

b9, the product gas inlet groove 402 is positioned at the first and ninth positions of the connecting pipe 43 under the adsorption tower, and meanwhile, when the product gas exhaust groove 202 is positioned at the first and ninth positions of the connecting pipe 23 on the adsorption tower and the high-pressure constant-pressure hole 205 is positioned at the second position of the connecting pipe 23 on the adsorption tower:

the third and eighth connecting pipes 23 on the adsorption tower are communicated with the second uniform lifting holes 206-B through the second uniform lifting holes 203-B;

a seventh connecting pipe 23 on the adsorption tower is communicated with the first low-pressure constant-pressure hole 204;

the fourth connecting pipe 23 of the adsorption tower passes through the vacuum groove 404, the fifth groove inner hole 4041, the lower connecting hole 4061 and the lower ring groove 406 in sequence until being communicated with the vacuum drain pipe 45.

In the above embodiment, the rotary valve used for pressure swing adsorption of biogas in nine adsorption towers was used, and the adsorption method was described. In practical industrial use, the number of adsorption towers, such as twelve adsorption towers, is increased due to the increase of the output of the product gas, and the number of upper and lower valve core channels of the rotary valve is also increased.

Based on the above, the embodiments of the rotary valve based on biogas pressure swing adsorption and the adsorption method thereof according to the present invention are taught, and by the above description, related workers can completely make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.

Claims

1. Rotary valve based on marsh gas pressure swing adsorption, its characterized in that:

The rotary valve includes: an upper valve (20) and a lower valve (40) which are coaxially arranged, the rotary valve is fixedly arranged in the supporting frame (10),

the upper valve (20) comprises:

the upper valve core (200) of rotatory setting, the central authorities of upper end of upper valve core (200) are provided with finished product gas row hole (201), and the upper end of upper valve core (200) is provided with indent finished product gas row groove (202) for centre of a circle circular array distribution along finished product gas row hole (201), first even drop hole (203-A), second even drop hole (203-B), third even drop hole (203-C), first low pressure constant voltage hole (204), high pressure constant voltage hole (205), first even rise hole (206-A), second even rise hole (206-B), third even rise hole (206-C), second low pressure constant voltage hole (207), wherein:

the finished gas discharging groove (202) is internally and internally provided with a first groove inner hole (2021) communicated with the high-pressure constant-pressure hole (205) and a second groove inner hole (2022) communicated with the finished gas discharging hole (201), namely the finished gas discharging hole (201), the finished gas discharging groove (202) and the high-pressure constant-pressure hole (205) are communicated;

the first uniform descending hole (203-A), the second uniform descending hole (203-B), the third uniform descending hole (203-C) and the first low-pressure constant-pressure hole (204) are symmetrically arranged on two sides of the finished gas exhaust groove (202) in sequence with the high-pressure constant-pressure hole (205), the first uniform ascending hole (206-A), the second uniform ascending hole (206-B) and the third uniform ascending hole (206-C);

The included angles from the first uniform descending hole (203-A), the second uniform descending hole (203-B), the third uniform descending hole (203-C) and the first low-pressure constant-pressure hole (204) to the center of the finished gas exhaust hole (201) are 20 degrees, and the included angles from the high-pressure constant-pressure hole (205), the first uniform ascending hole (206-A), the second uniform ascending hole (206-B) and the third uniform ascending hole (206-C) to the center of the finished gas exhaust hole (201) are 20 degrees;

the first uniform descending hole (203-A) is communicated with the first uniform ascending hole (206-A), the second uniform descending hole (203-B) is communicated with the second uniform ascending hole (206-B), the third uniform descending hole (203-C) is communicated with the third uniform ascending hole (206-C), the first low-pressure constant-pressure hole (204) is communicated with the second low-pressure constant-pressure hole (207), and the first low-pressure constant-pressure hole (204) is communicated with the second low-pressure constant-pressure hole (207);

the second low-pressure constant-pressure hole (207) is arranged at the opposite side of the finished gas exhaust groove (202);

the lower valve (40) comprises:

the rotary type product desorption device comprises a lower valve core (400) which is rotationally arranged, wherein a product gas inlet hole (401) is formed in the center of the lower end of the lower valve core (400), concave product gas inlet grooves (402), desorption grooves (403) and vacuum grooves (404) are formed in the lower end of the lower valve core (400) in a circular array mode with the product gas inlet hole (401) as a circle center, the product gas inlet grooves (402) are formed right below a product gas exhaust groove (202), third groove inner holes (4021) which are communicated with the product gas inlet hole (401) are formed in the product gas inlet grooves (402) in a communicating mode, the desorption grooves (403) and the vacuum grooves (404) are arranged on the opposite sides of the product gas inlet grooves (402) in parallel, and fourth groove inner holes (4031) are formed in the desorption grooves (403) in a communicating mode;

An annular upper annular groove (405) and a lower annular groove (406) are concavely arranged on the side wall of the lower valve core (400), an upper connecting hole (4051) is formed in the upper annular groove (405), a fourth groove inner hole (4031) is communicated with the upper connecting hole (4051), a fifth groove inner hole (4041) is formed in the vacuum groove (404) in a connecting mode, a lower connecting hole (4061) is formed in the lower annular groove (406) in a connecting mode, the fifth groove inner hole (4041) is communicated with the lower connecting hole (4061), and a plurality of sealing rings (407) are arranged on the side wall of the lower valve core (400) between the upper annular groove (405) and the lower annular groove (406);

be provided with speed reducer (31) between last valve (20), lower valve (40), the power input shaft department coaxial coupling of speed reducer (31) is provided with driving motor (32), and the power output shaft department of speed reducer (31) upwards, downwardly extending is provided with coaxial main pivot (33), the upper and lower both ends of main pivot (33) are provided with upper connecting axle (34) with upper valve core (200) lower extreme coaxial coupling, lower connecting axle (35) with lower valve core (400) upper end coaxial coupling.

2. The rotary valve based on biogas pressure swing adsorption according to claim 1, wherein:

the support frame (10) is of a frame structure, an upper fixing plate (11) and a lower fixing plate (12) which are U-shaped are arranged at the upper end and the lower end of the support frame (10), an upper valve (20) and a lower valve (40) are respectively fixed, and a plurality of reinforcing cross braces (13) are arranged in the middle of the support frame (10);

The top end of the lower valve (40) is fixedly provided with a mounting rack (14) for mounting a speed reducer (31);

the power supply end of the driving motor (32) is electrically connected with a frequency converter.

3. The rotary valve based on biogas pressure swing adsorption according to claim 1, wherein:

the upper end of the upper valve (20) is provided with an upper sealing plate (21) which is in sealing connection with the upper end of the upper valve core (200), a finished product gas discharge pipe (22) is arranged in the center of the upper end of the upper sealing plate (21) in a penetrating mode, the finished product gas discharge pipe (22) is connected to a finished product gas buffer tank, a plurality of adsorption tower upper connecting pipes (23) are distributed on the upper end of the upper sealing plate (21) along the finished product gas discharge pipe (22) in a circular array mode at the center of a circle, the adsorption tower upper connecting pipes (23) penetrate through the upper sealing plate (21) and are connected to the top of the adsorption tower, and monitoring pipes (24) are arranged on the outer wall of a valve body of the upper valve (20) in a penetrating mode.

4. A rotary valve based on biogas pressure swing adsorption according to claim 3, characterized in that:

the lower end of lower valve (40) is provided with lower shrouding (41) with lower end sealing connection of lower case (400), the central authorities of lower shrouding (41) lower extreme run through and are provided with product gas inlet tube (42), product gas inlet tube (42) are connected to product gas buffer tank department, and lower shrouding (41) lower extreme is provided with a plurality of adsorption tower down connecting tube (43) for centre of a circle circular array distribution along product gas inlet tube (42), lower shrouding (43) run through down shrouding (41) under the adsorption tower to be connected to adsorption tower bottom department, run through on the valve body outer wall of lower valve (40) and be provided with desorption inlet tube (44), vacuum calandria (45), desorption inlet tube (44), vacuum calandria (45) are linked together with last annular (405), lower annular (406) respectively.

5. The rotary valve based on biogas pressure swing adsorption according to claim 4, wherein:

the number of the upper connecting pipes (23) and the lower connecting pipes (43) of the adsorption towers is nine, and the upper connecting pipes (23) of the adsorption towers are arranged right above the lower connecting pipes (43) of the adsorption towers.

6. The rotary valve based on biogas pressure swing adsorption according to claim 5, wherein:

the finished gas discharge groove (202) spans two adjacent upper connecting pipes (23) of the adsorption towers;

the finished gas exhaust holes (201), the finished gas exhaust grooves (202) and the high-pressure constant-pressure holes (205) are communicated.

7. The rotary valve based on biogas pressure swing adsorption according to claim 6, wherein:

the product gas inlet hole (401) and the product gas inlet groove (402) are communicated;

the desorption groove (403) stretches across the lower connecting pipe (43) of the two adjacent adsorption towers, and the desorption groove (403), the upper annular groove (405) and the desorption inlet pipe (44) are communicated;

the vacuum groove (404), the lower ring groove (406) and the vacuum draining pipe (45) are communicated.

8. The rotary valve adsorption method based on biogas pressure swing adsorption according to claim 7, wherein:

the driving motor (32) rotates, the main rotating shaft (33) is driven to rotate through the speed reducer (31), meanwhile, the upper connecting shaft (34) and the lower connecting shaft (35) respectively drive the upper valve core (200) and the lower valve core (400) to synchronously rotate, N adsorption towers are arranged in total, the upper ends and the lower ends of the adsorption towers are respectively communicated with the upper connecting pipe (23) and the lower connecting pipe (43) of the adsorption towers, namely N adsorption tower upper connecting pipes (23) and N adsorption tower lower connecting pipes (43) are respectively arranged;

A0, the product gas inlet groove (402) is positioned at the N and N+1 positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas exhaust groove (202) is positioned at the N and N+1 positions of the connecting pipe (23) above the adsorption tower:

the N+2 and N+8 positions of the connecting pipe (23) on the adsorption tower are communicated with the first uniform lifting hole (206-A) through the first uniform lifting hole (203-A);

the N+3 th and N+7 th positions of the connecting pipe (23) on the adsorption tower are communicated with the third uniform lifting hole (206-C) through the third uniform lifting hole (203-C);

the (n+5) th and the (n+6) th positions of the connecting pipe (23) on the adsorption tower pass through the desorption groove (403), pass through the inner hole (4031) of the fourth groove, the upper connecting hole (4051) and the upper annular groove (405) in sequence until being communicated with the desorption inlet pipe (44);

the (n+4) th position of the upper connecting pipe (23) of the adsorption tower passes through the vacuum groove (404), sequentially passes through the inner hole (4041) of the fifth groove, the lower connecting hole (4061) and the lower annular groove (406) until being communicated with the vacuum calandria (45);

b0, the product gas inlet groove (402) is positioned at the N and N+1 positions of the connecting pipe (43) below the adsorption tower, meanwhile, the product gas exhaust groove (202) is positioned at the N and N+1 positions of the connecting pipe (23) above the adsorption tower, and when the high-pressure constant-pressure hole (205) is positioned at the N+2 position of the connecting pipe (23) above the adsorption tower:

the N+3 and N+8 positions of the connecting pipe (23) on the adsorption tower are communicated with the second uniform lifting hole (206-B) through the second uniform lifting hole (203-B);

The (n+7) th position of the connecting pipe (23) on the adsorption tower is communicated with the first low-pressure constant-pressure hole (204);

the N+5 and N+6 positions of the connecting pipe (23) on the adsorption tower pass through the desorption groove (403), pass through the inner hole (4031) of the fourth groove, the upper connecting hole (4051) and the upper ring groove (405) in sequence until being communicated with the desorption inlet pipe (44);

the (n+4) th position of the upper connecting pipe (23) of the adsorption tower passes through the vacuum groove (404), sequentially passes through the inner hole (4041) of the fifth groove, the lower connecting hole (4061) and the lower annular groove (406) until being communicated with the vacuum exhaust pipe (45).

9. The rotary valve adsorption method based on biogas pressure swing adsorption according to claim 7, wherein:

the driving motor (32) rotates, the main rotating shaft (33) is driven to rotate by the speed reducer (31), meanwhile, the upper connecting shaft (34) and the lower connecting shaft (35) respectively drive the upper valve core (200) and the lower valve core (400) to synchronously rotate, nine adsorption towers are arranged, the upper end and the lower end of each adsorption tower are respectively communicated with the upper connecting pipe (23) and the lower connecting pipe (43) of each adsorption tower, and the upper connecting pipe (23) and the lower connecting pipe (43) of each adsorption tower are marked as one to nine numbers according to the rotation directions of the upper valve core (200) and the lower valve core (400);

a1, the product gas inlet groove (402) is positioned at the first and second positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas exhaust groove (202) is positioned at the first and second positions of the connecting pipe (23) above the adsorption tower:

The third and ninth connecting pipes (23) on the adsorption tower are communicated with the first uniform lifting holes (206-A) through the first uniform lifting holes (203-A);

the fourth and eighth connecting pipes (23) on the adsorption tower are communicated with the third uniform lifting hole (206-C) through the third uniform lifting hole (203-C);

the sixth and seventh numbers of the upper connecting pipe (23) of the adsorption tower pass through the desorption groove (403), pass through the inner hole (4031) of the fourth groove, the upper connecting hole (4051) and the upper annular groove (405) in sequence until being communicated with the desorption inlet pipe (44);

the fifth number of the connecting pipe (23) on the adsorption tower passes through the vacuum groove (404), and sequentially passes through the inner hole (4041) of the fifth groove, the lower connecting hole (4061) and the lower annular groove (406) until being communicated with the vacuum calandria (45);

b1, the product gas inlet groove (402) is positioned at the first and second positions of the connecting pipe (43) below the adsorption tower, meanwhile, the product gas exhaust groove (202) is positioned at the first and second positions of the connecting pipe (23) above the adsorption tower, and when the high-pressure constant-pressure hole (205) is positioned at the third position of the connecting pipe (23) above the adsorption tower:

the fourth and ninth connecting pipes (23) on the adsorption tower are communicated with the second uniform lifting holes (206-B) through the second uniform lifting holes (203-B);

the eighth connecting pipe (23) on the adsorption tower is communicated with the first low-pressure constant-pressure hole (204);

a2, the product gas inlet groove (402) is positioned at the second and third positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas discharge groove (202) is positioned at the second and third positions of the connecting pipe (23) above the adsorption tower:

the fifth and ninth connecting pipes (23) on the adsorption tower are communicated with the third uniform lifting hole (206-C) through the third uniform lifting hole (203-C);

the seventh and eighth connecting pipes (23) on the adsorption tower pass through the desorption groove (403), pass through the inner hole (4031) of the fourth groove, the upper connecting hole (4051) and the upper annular groove (405) in sequence until being communicated with the desorption inlet pipe (44);

the sixth number of the connecting pipe (23) on the adsorption tower passes through the vacuum groove (404), and sequentially passes through the inner hole (4041) of the fifth groove, the lower connecting hole (4061) and the lower annular groove (406) until being communicated with the vacuum calandria (45);

the first and fourth connecting pipes (23) on the adsorption tower are communicated with the first uniform lifting holes (206-A) through the first uniform lifting holes (203-A);

b2, the product gas inlet groove (402) is positioned at the second and third positions of the connecting pipe (43) below the adsorption tower, meanwhile, the product gas exhaust groove (202) is positioned at the second and third positions of the connecting pipe (23) above the adsorption tower, and when the high-pressure constant-pressure hole (205) is positioned at the fourth position of the connecting pipe (23) above the adsorption tower:

A ninth connecting pipe (23) on the adsorption tower is communicated with the first low-pressure constant-pressure hole (204);

the first and fifth connecting pipes (23) on the adsorption tower are communicated with the second uniform lifting holes (206-B) through the second uniform lifting holes (203-B);

a3, the product gas inlet groove (402) is positioned at the third and fourth positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas discharge groove (202) is positioned at the third and fourth positions of the connecting pipe (23) above the adsorption tower:

the eighth and ninth connecting pipes (23) on the adsorption tower pass through the desorption groove (403), pass through the inner hole (4031) of the fourth groove, the upper connecting hole (4051) and the upper annular groove (405) in sequence until being communicated with the desorption inlet pipe (44);

the seventh connecting pipe (23) on the adsorption tower passes through the vacuum groove (404), and sequentially passes through the inner hole (4041) of the fifth groove, the lower connecting hole (4061) and the lower annular groove (406) until being communicated with the vacuum calandria (45);

The first and sixth connecting pipes (23) on the adsorption tower are communicated with the third uniform lifting hole (206-C) through the third uniform lifting hole (203-C);

the second and fifth connecting pipes (23) on the adsorption tower are communicated with the first uniform lifting holes (206-A) through the first uniform lifting holes (203-A);

b3, the product gas inlet groove (402) is positioned at the third and fourth positions of the connecting pipe (43) below the adsorption tower, meanwhile, the product gas exhaust groove (202) is positioned at the third and fourth positions of the connecting pipe (23) above the adsorption tower, and the high-pressure constant-pressure hole (205) is positioned at the fifth position of the connecting pipe (23) above the adsorption tower:

the second and the sixth connecting pipes (23) on the adsorption tower are communicated with the second uniform lifting holes (206-B) through the second uniform lifting holes (203-B);

the first number of the connecting pipe (23) on the adsorption tower is communicated with the first low-pressure constant-pressure hole (204);

a4, the product gas inlet groove (402) is positioned at the fourth and fifth positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas discharge groove (202) is positioned at the third and fourth positions of the connecting pipe (23) above the adsorption tower:

The first and ninth numbers of the upper connecting pipe (23) of the adsorption tower pass through the desorption groove (403), pass through the inner hole (4031) of the fourth groove, the upper connecting hole (4051) and the upper annular groove (405) in sequence until being communicated with the desorption inlet pipe (44);

the eighth connecting pipe (23) on the adsorption tower passes through the vacuum groove (404), the inner hole (4041) of the fifth groove, the lower connecting hole (4061) and the lower annular groove (406) in sequence until being communicated with the vacuum calandria (45);

the second and seventh connecting pipes (23) on the adsorption tower are communicated with the third uniform lifting holes (206-C) through the third uniform lifting holes (203-C);

the third and sixth connecting pipes (23) on the adsorption tower are communicated with the first uniform lifting holes (206-A) through the first uniform lifting holes (203-A);

b4, the product gas inlet groove (402) is positioned at the fourth and fifth positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas exhaust groove (202) is positioned at the fourth and fifth positions of the connecting pipe (23) above the adsorption tower and the high-pressure constant-pressure hole (205) is positioned at the sixth position of the connecting pipe (23) above the adsorption tower:

The third and seventh connecting pipes (23) on the adsorption tower are communicated with the second uniform lifting holes (206-B) through the second uniform lifting holes (203-B);

the second connecting pipe (23) on the adsorption tower is communicated with the first low-pressure constant-pressure hole (204);

a5, the product gas inlet groove (402) is positioned at the fifth and sixth positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas discharge groove (202) is positioned at the fifth and sixth positions of the connecting pipe (23) above the adsorption tower:

the first and second numbers of the upper connecting pipe (23) of the adsorption tower pass through the desorption groove (403), pass through the inner hole (4031) of the fourth groove, the upper connecting hole (4051) and the upper annular groove (405) in sequence until being communicated with the desorption inlet pipe (44);

the ninth connecting pipe (23) on the adsorption tower passes through the vacuum groove (404), the inner hole (4041) of the fifth groove, the lower connecting hole (4061) and the lower annular groove (406) in sequence until being communicated with the vacuum calandria (45);

the third and eighth connecting pipes (23) on the adsorption tower are communicated with the third uniform lifting holes (206-C) through the third uniform lifting holes (203-C);

the fourth and seventh connecting pipes (23) on the adsorption tower are communicated with the first uniform lifting holes (206-A) through the first uniform lifting holes (203-A);

b5, the product gas inlet groove (402) is positioned at the fifth and sixth positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas exhaust groove (202) is positioned at the fifth and sixth positions of the connecting pipe (23) above the adsorption tower and the high-pressure constant-pressure hole (205) is positioned at the seventh position of the connecting pipe (23) above the adsorption tower:

the third connecting pipe (23) on the adsorption tower is communicated with the first low-pressure constant-pressure hole (204);

the fourth and eighth connecting pipes (23) on the adsorption tower are communicated with the second uniform lifting holes (206-B) through the second uniform lifting holes (203-B);

a6, the product gas inlet groove (402) is positioned at the sixth and seventh positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas discharge groove (202) is positioned at the sixth and seventh positions of the connecting pipe (23) above the adsorption tower:

the second and third numbers of the upper connecting pipe (23) of the adsorption tower pass through the desorption groove (403), pass through the inner hole (4031) of the fourth groove, the upper connecting hole (4051) and the upper annular groove (405) in sequence until being communicated with the desorption inlet pipe (44);

the first number of the connecting pipe (23) on the adsorption tower passes through the vacuum groove (404), and sequentially passes through the inner hole (4041) of the fifth groove, the lower connecting hole (4061) and the lower annular groove (406) until being communicated with the vacuum calandria (45);

The fourth and ninth connecting pipes (23) on the adsorption tower are communicated with the third uniform lifting hole (206-C) through the third uniform lifting hole (203-C);

the fifth and eighth connecting pipes (23) on the adsorption tower are communicated with the first uniform lifting holes (206-A) through the first uniform lifting holes (203-A);

b6, the product gas inlet groove (402) is positioned at the sixth and seventh positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas exhaust groove (202) is positioned at the sixth and seventh positions of the connecting pipe (23) above the adsorption tower and the high-pressure constant-pressure hole (205) is positioned at the eighth position of the connecting pipe (23) above the adsorption tower:

the fifth and ninth connecting pipes (23) on the adsorption tower are communicated with the second uniform lifting holes (206-B) through the second uniform lifting holes (203-B);

a fourth connecting pipe (23) on the adsorption tower is communicated with the first low-pressure constant-pressure hole (204);

a7, the product gas inlet groove (402) is positioned at the seventh and eighth positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas discharge groove (202) is positioned at the seventh and eighth positions of the connecting pipe (23) above the adsorption tower:

The third and fourth connecting pipes (23) of the adsorption tower pass through the desorption groove (403), pass through the inner hole (4031) of the fourth groove, the upper connecting hole (4051) and the upper ring groove (405) in sequence until being communicated with the desorption inlet pipe (44);

the second number of the connecting pipe (23) on the adsorption tower passes through the vacuum groove (404), and sequentially passes through the inner hole (4041) of the fifth groove, the lower connecting hole (4061) and the lower annular groove (406) until being communicated with the vacuum calandria (45);

the first and fifth connecting pipes (23) on the adsorption tower are communicated with the third uniform lifting hole (206-C) through the third uniform lifting hole (203-C);

the sixth and ninth connecting pipes (23) on the adsorption tower are communicated with the first uniform lifting holes (206-A) through the first uniform lifting holes (203-A);

b7, the product gas inlet groove (402) is positioned at the seventh position and the eighth position of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas exhaust groove (202) is positioned at the seventh position and the eighth position of the connecting pipe (23) above the adsorption tower and the high-pressure constant-pressure hole (205) is positioned at the ninth position of the connecting pipe (23) above the adsorption tower:

the first and the sixth connecting pipes (23) on the adsorption tower are communicated with the second uniform lifting holes (206-B) through the second uniform lifting holes (203-B);

the fifth connecting pipe (23) on the adsorption tower is communicated with the first low-pressure constant-pressure hole (204);

a8, the product gas inlet groove (402) is positioned at the eighth and ninth positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas discharge groove (202) is positioned at the eighth and ninth positions of the connecting pipe (23) above the adsorption tower:

the fourth and fifth numbers of the upper connecting pipe (23) of the adsorption tower pass through the desorption groove (403), pass through the inner hole (4031) of the fourth groove, the upper connecting hole (4051) and the upper annular groove (405) in sequence until being communicated with the desorption inlet pipe (44);

the third number of the connecting pipe (23) on the adsorption tower passes through the vacuum groove (404), and sequentially passes through the inner hole (4041) of the fifth groove, the lower connecting hole (4061) and the lower annular groove (406) until being communicated with the vacuum calandria (45);

the second and sixth connecting pipes (23) on the adsorption tower are communicated with the third uniform lifting hole (206-C) through the third uniform lifting hole (203-C);

the first and seventh connecting pipes (23) on the adsorption tower are communicated with the first uniform lifting holes (206-A) through the first uniform lifting holes (203-A);

b8, the product gas inlet groove (402) is positioned at the eighth and ninth positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas exhaust groove (202) is positioned at the eighth and ninth positions of the connecting pipe (23) above the adsorption tower and the high-pressure constant-pressure hole (205) is positioned at the first position of the connecting pipe (23) above the adsorption tower:

The second and seventh connecting pipes (23) on the adsorption tower are communicated with the second uniform lifting holes (206-B) through the second uniform lifting holes (203-B);

a sixth connecting pipe (23) on the adsorption tower is communicated with the first low-pressure constant-pressure hole (204);

a9, the product gas inlet groove (402) is positioned at the first and ninth positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas discharge groove (202) is positioned at the first and ninth positions of the connecting pipe (23) above the adsorption tower:

fifth and sixth connecting pipes (23) on the adsorption tower pass through a desorption groove (403), pass through an inner hole (4031) of the fourth groove, an upper connecting hole (4051) and an upper annular groove (405) in sequence until being communicated with a desorption inlet pipe (44);

the fourth connecting pipe (23) on the adsorption tower passes through the vacuum groove (404), and sequentially passes through the inner hole (4041) of the fifth groove, the lower connecting hole (4061) and the lower annular groove (406) until being communicated with the vacuum calandria (45);

The third and seventh connecting pipes (23) on the adsorption tower are communicated with the third uniform lifting holes (206-C) through the third uniform lifting holes (203-C);

the second and eighth connecting pipes (23) on the adsorption tower are communicated with the first uniform lifting holes (206-A) through the first uniform lifting holes (203-A);

b9, the product gas inlet groove (402) is positioned at the first and ninth positions of the connecting pipe (43) below the adsorption tower, and meanwhile, when the product gas exhaust groove (202) is positioned at the first and ninth positions of the connecting pipe (23) above the adsorption tower and the high-pressure constant-pressure hole (205) is positioned at the second position of the connecting pipe (23) above the adsorption tower:

the third and eighth connecting pipes (23) on the adsorption tower are communicated with the second uniform lifting holes (206-B) through the second uniform lifting holes (203-B);

a seventh connecting pipe (23) on the adsorption tower is communicated with the first low-pressure constant-pressure hole (204);

the fourth connecting pipe (23) on the adsorption tower passes through the vacuum groove (404), sequentially passes through the inner hole (4041) of the fifth groove, the lower connecting hole (4061) and the lower annular groove (406) until being communicated with the vacuum calandria (45).