Multi-way valve capable of being connected with multiple adsorption columns and controlling material switching and continuous adsorption device of multi-way valve

Abstract

The invention belongs to the field of adsorption, and discloses a multi-way valve capable of being connected with a plurality of adsorption columns and controlling material switching and a continuous adsorption device of the multi-way valve, and the continuous adsorption device mainly comprises the adsorption columns, a six-way valve and a feeding multi-way valve. Continuous adsorption under different functions is realized by combining a plurality of adsorption columns with one feeding multi-way valve or combining a plurality of adsorption columns with a plurality of six-way valves and two feeding multi-way valves. The number of the adsorption columns can be increased or decreased according to specific requirements, and compared with a traditional fixed bed adsorption system, the number of valves is small, and logic control is simple; compared with a continuous moving bed adsorption system, the device has the advantages that the rotation of the adsorption column is replaced by the rotation control of the multi-way valve, the structure is simplified, and the operation energy consumption is reduced. According to the device, water washing and elution can be carried out synchronously, and intermittent operation of water washing and elution can be realized through combined control of the feeding multi-way valve and the six-way valve, so that the number of adsorption columns and the use of adsorption materials are reduced, and finally the system cost is reduced.

Description

Technical Field

[0001] The invention belongs to the field of adsorption, and in particular to a multi-way valve capable of connecting a plurality of adsorption columns and controlling material switching and a continuous adsorption device thereof. Background Art

[0002] Adsorption is a typical unit operation of mass transfer and separation process, which is widely used in the recovery, enrichment and purification of dispersed elements in the fields of chemical industry, food, medicine, water treatment, environmental protection, etc. How to develop an adsorption equipment with simple operation, easy control and low cost has always been the focus of research.

[0003] Chinese patent CN102031368A discloses a continuous ion exchange device and method for extracting lithium from salt lake brine, wherein the resin columns are connected in series in sequence through a series pipeline, and form an adsorption resin column group and a rapid elution resin column group that move and circulate in sequence. A control valve is provided on each feed branch pipe and a discharge branch pipe, respectively, for coordinating and controlling the ion exchange, washing, elution and resin regeneration process between each resin column group in turn. Chinese patent CN114892025A discloses a simulated moving bed lithium extraction adsorption process, wherein a plurality of adsorption columns are arranged in the adsorption bed, and the adsorption columns are sequentially placed in the adsorption stage, elution stage, desorption stage and water washing stage by controlling the valve, and cyclic operation. In any time period, 3n adsorption columns are kept in the adsorption stage, N adsorption columns are kept in the elution stage, desorption stage, water washing stage or as blank standby, n is a natural number not less than 2, and N is a non-zero natural number less than n. Although these technologies can realize continuous adsorption function, these technologies have problems such as many valves, complex equipment, and cumbersome control. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a multi-way valve and a continuous adsorption device that can connect multiple adsorption columns and control material switching. By utilizing the multi-way valve to control the entry and switching of materials, the number of valves can be reduced, and the adsorption, water washing or elution of different adsorption columns and the continuous operation of the adsorption process can be achieved.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] A first aspect of the present invention provides a multi-way valve comprising a valve housing and a valve core. The multi-way valve is a 2n-position multi-way valve (n≥3), which connects the inlet and outlet of n adsorption columns. By rotating the 2n-position multi-way valve core clockwise or counterclockwise by a certain angle, the operating states of different adsorption columns can be switched.

[0007] Furthermore, the 2n (n≥4)-position multi-way valve is a 2n-position eight-way valve, the valve housing contains 8 first interfaces and 2n second interfaces, the 2n second interfaces are radially evenly distributed on the side of the valve housing, the angle between two adjacent second interfaces is (360 / 2n)°, each second interface corresponds to an equally divided position in the valve core, and there are 2n equally divided positions in total. The valve core contains 8 channels and n-4 notches, each channel has an inlet and an outlet, the inlet of the channel is connected to the first interface correspondingly, the channel outlet is distributed at different equally divided positions corresponding to the second interface, and the notch is distributed between other two adjacent equally divided positions. By rotating the valve core of the 2n-position eight-way valve, any two adjacent channel outlets of the valve core can be connected to any two adjacent interfaces in the second interfaces, and the notch of the valve core can allow any two adjacent second interfaces in the second interfaces to be connected.

[0008] Furthermore, the multi-way valve is a 2n (n≥3)-position four-way valve, the valve housing contains 4 first interfaces and 2n second interfaces, the second interfaces are radially evenly distributed on the side of the valve housing, the angle between two adjacent second interfaces is (360 / 2n)°, each second interface corresponds to an equally divided position in the valve core, and there are 2n equally divided positions in total. The valve core contains 4 channels and n-2 notches, each channel has an inlet and an outlet, the inlet of the channel is connected to the first interface correspondingly, the channel outlet is distributed at different equally divided positions corresponding to the second interface, and the notch is distributed between other two adjacent equally divided positions. By rotating the valve core of the 2n-position four-way valve, any two adjacent channel outlets of the valve core can be connected to any two adjacent interfaces in the second interfaces, and the notch of the valve core can allow any two adjacent interfaces in the second interfaces to be connected.

[0009] The second aspect of the present invention provides a continuous adsorption device based on the 2n-position multi-way valve, comprising a plurality of adsorption columns and a plurality of multi-way valves for controlling material entry and switching, and adsorption, water washing or elution of different adsorption columns can be achieved through combined control of the multi-way valves.

[0010] Furthermore, the continuous adsorption device comprises n (n≥4) adsorption columns and a 2n-position eight-way valve for controlling the material to enter the device, the 2n second interfaces of the 2n-position eight-way valve are respectively connected to the inlet and outlet of the n adsorption columns in sequence, and by rotating the valve core of the 2n-position eight-way valve, any two adjacent channels of the valve core can be connected to any two adjacent interfaces of the second interfaces, and the notches of the valve core can allow any two adjacent second interfaces to be connected.

[0011] Furthermore, the continuous adsorption device includes n (n≥3) adsorption columns, n six-way valves and two 2n-position four-way valves for controlling the material to enter the device, the valve housing of the 2n-position four-way valve has four first interfaces and 2n second interfaces, the six-way valve has an a interface, a b interface, a c interface, a d interface, an e interface and an f interface, each six-way valve is connected to a different adsorption column, wherein the a interface and the d interface of the six-way valve are respectively connected to the inlet and the outlet of the adsorption column. The b interface and the c interface of each six-way valve are respectively connected to the second interface of one of the 2n-position four-way valves in turn, and the e interface and the f interface of each six-way valve are respectively connected to the second interface of another 2n-position four-way valve in turn.

[0012] Furthermore, the continuous adsorption device comprises n (n≥4) adsorption columns, a 2n-position eight-way valve for controlling the material to enter the device, and n six-way valves, each of which is connected to a different adsorption column, and the six-way valve has an a interface, a b interface, a c interface, a d interface, an e interface, and an f interface, and the a interface and the d interface of the six-way valve are respectively connected to the inlet and the outlet of the adsorption column. The b interface and the c interface of each six-way valve are respectively connected to the second interface of the 2n-position eight-way valve in sequence; the e interface and the f interface of the adjacent six-way valve are connected, and the f interface of the six-way valve connected to the first-stage adsorption column and the e interface of the six-way valve connected to the last-stage adsorption column are the water washing liquid inlet and the water washing liquid outlet, respectively.

[0013] The third aspect of the present invention provides an operating method of the continuous adsorption device, which is as follows:

[0014] When a continuous adsorption device including n (n≥4) adsorption columns and a 2n-position eight-way valve for controlling material entry is in operation, the eight second interfaces of the valve housing of the 2n-position eight-way valve are respectively a raw material liquid inlet, a raw material liquid outlet, an eluent inlet, an eluent outlet, a clean water inlet for washing the raw material liquid, a clean water outlet for washing the raw material liquid, a clean water inlet for washing the eluent, and a clean water outlet for washing the eluent. By rotating the valve core of the 2n-position eight-way valve clockwise or counterclockwise (360 / n)°, switching of the operating states of different adsorption columns can be achieved.

[0015] When a continuous adsorption device including n (n≥3) adsorption columns, n six-way valves and two 2n-position four-way valves for controlling material entry is in operation, the four first interfaces of a valve housing of one 2n-position four-way valve are correspondingly a raw material liquid inlet, a raw material liquid outlet, a clean water inlet for washing the raw material liquid, and a clean water outlet for washing the raw material liquid, and the four first interfaces of a valve housing of another 2n-position four-way valve are correspondingly an eluent inlet, an eluent outlet, a clean water inlet for washing the eluent, and a clean water outlet for washing the eluent. By rotating the valve core of the corresponding 2n-position four-way valve (360 / n)° and the valve core of the six-way valve 60° clockwise or counterclockwise at the same time, the operation state switching of different adsorption columns is realized.

[0016] When a continuous adsorption device comprising n (n≥4) adsorption columns, a 2n-position eight-way valve for controlling the material entering the device and n six-way valves is in operation, the adsorption column can be cut out of the device by rotating the valve core of the six-way valve connected to the corresponding adsorption column 60° clockwise or counterclockwise.

[0017] The advantages and positive effects of the present invention are:

[0018] The continuous adsorption device of the present invention adopts a six-way valve and a feed multi-way valve to replace the traditional two-way valve, which greatly reduces the number of valves and simplifies the device structure and control logic; the device is easy to increase or decrease the number of adsorption columns, and the device operation logic does not change after the increase or decrease; the continuous adsorption device can realize the simultaneous operation of water washing and elution, and can also realize the intermittent operation of water washing and elution by combining the control of the feed multi-way valve and the six-way valve, thereby reducing the number of adsorption columns and reducing the system cost; the continuous adsorption device only involves the rotation operation of a limited number of valves during operation, and is easy to realize automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the adsorption device in Example 1; Figure 2 Schematic diagram of the structure of the twelve-position eight-way valve in Example 1, wherein A is a top perspective view of the twelve-position eight-way valve; B is a front perspective view of the twelve-position eight-way valve; C is a top perspective view of the twelve-position eight-way valve after the valve core is rotated 60° counterclockwise; Figure 3 This is a schematic structural diagram of another adsorption state of the adsorption device in Example 1; Figure 4 This is a schematic diagram of the structure of the adsorption device in Example 2; Figure 5 Schematic diagram of the structure of the ten-position eight-way valve in Example 2, wherein A is a top perspective view of the ten-position eight-way valve; B is a top perspective view of the ten-position eight-way valve after the valve core is rotated 72° counterclockwise; Figure 6 This is a schematic diagram of the structure of the adsorption device in Example 3; Figure 7 Schematic diagram of the structure of the eight-position eight-way valve in Example 3, wherein A is a top perspective view of the eight-position eight-way valve; B is a top perspective view of the eight-position eight-way valve after the valve core is rotated 90° counterclockwise; Figure 8 This is a schematic diagram of the structure of the adsorption device in Example 4; Fig. 9 Schematic diagram of the structure of the six-way valve in Example 4, wherein A is a top perspective view of the six-way valve; B is a front perspective view of the six-way valve; and C is a top perspective view of the valve core of the six-way valve after rotating 60° clockwise. Fig.10 This is a schematic diagram of the structure of the adsorption device in Example 5; Fig.11 Schematic diagram of the structure of the six-position four-way valve in Example 5, wherein A is a top perspective view of the six-position four-way valve; B is a front perspective view of the six-position four-way valve; C is a top perspective view of the six-position four-way valve after the valve core is rotated 120° counterclockwise; Fig.12 This is a schematic diagram of the structure of the adsorption device in Example 6; Fig.13 Schematic diagram of the structure of the ten-position four-way valve in Example 6, wherein A is a top perspective view of the ten-position four-way valve; B is a top perspective view of the ten-position four-way valve after the valve core is rotated 72° counterclockwise; Fig.14 Schematic diagram of the adsorption device structure with only one water wash Figure 1 ; Fig.15 Schematic diagram of the adsorption device structure with only one water wash Figure 2 .

[0020] Explanation of the numbers in the figure: 1-4 are the raw material liquid inlet, the eluent inlet, the clean water inlet for washing the raw material liquid, and the clean water inlet for washing the eluent; 5-8 are the raw material liquid outlet, the eluent outlet, the clean water outlet for washing the raw material liquid, and the clean water outlet for washing the eluent; 9 is a twelve-position eight-way valve one, 10 is an adsorption column one, 11 is an adsorption column two, 12 is an adsorption column three, 13 is an adsorption column four, 14 is an adsorption column five, 15 is an adsorption column six, 16 is a ten-position eight-way valve, 17 is an adsorption column seven, 18 is an adsorption column eight, 19 is an adsorption column nine, 20 is an adsorption column ten, 21 is an adsorption column eleven, 22 is an eight-position eight-way valve; 23 is an adsorption column twelve, 24 is an adsorption column thirteen, 25 is an adsorption column fourteen, 26 is an adsorption column fifteen, 27 is a twelve-position eight-way valve two, 28 is a six-way valve one, 29 is a six-way valve two, 30 is a six-way valve three, 31 is a six-way valve four, 32 is a six-way valve five, 33 is a six-way valve six, 34 is an adsorption column sixteen, 35 is an adsorption column seventeen, 36 is an adsorption column eighteen, 37 is an adsorption column nineteen, 38 is an adsorption column twenty, 39 is an adsorption column twenty-one, 40 is a six-position four-way valve one, 41 is a six-position four-way valve two; 42 is a six-way valve seven, 43 is a six-way valve eight, 44 is a six-way valve nine, 45 is an adsorption column twenty-two, 46 ​​is an adsorption column twenty-three, 47 is an adsorption column twenty-four, 48 is a ten-position four-way valve one, 49 is a ten-position four-way valve two, 50 is a six-way valve ten, 51 is a six-way valve eleven, 52 is a six-way valve twelve, 53 is a six-way valve thirteen, 54 is a six-way valve fourteen, 55 is an adsorption column twenty-five, 56 is an adsorption column twenty-six, 57 is the twenty-seventh adsorption column, 58 is the twenty-eighth adsorption column, 59 is the twenty-nineth adsorption column, 60 is the twelve-position six-way valve; 61 is the thirty-second adsorption column, 62 is the thirty-first adsorption column, 63 is the thirty-second adsorption column, 64 is the thirty-third adsorption column, 65 is the thirty-fourth adsorption column, 66 is the thirty-fifth adsorption column, 67 is the ten-position two-way valve, 68 is the ten-position four-way valve three, 69 is the fifteenth six-way valve, 70 is the sixteenth six-way valve, 71 is the seventeenth six-way valve, 72 is the eighteenth six-way valve, 73 is the nineteenth six-way valve, 74 is the thirty-sixth adsorption column, 75 is the thirty-seventh adsorption column, 76 is the thirty-eighth adsorption column, 77 is the thirty-nineth adsorption column, and 78 is the fortyth adsorption column. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and through specific embodiments. The following embodiments are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0022] Example 1

[0023] A continuous adsorption device using a multi-way valve to control material switching is composed of 6 adsorption columns and a 12-position 8-way valve. Since the device contains 6 adsorption columns, that is, n=6, the valve housing of the 12-position 8-way valve contains 2×6=12 second interfaces. The device structure is as follows Figure 1As shown, the top perspective view and the front perspective view of the twelve-position eight-way valve are shown in Figure 2 A and B. The 12-position 8-way valve includes a valve housing and a valve core. The valve core can rotate in the valve housing. The valve housing has 8 first interfaces (i~p interfaces) and 12 second interfaces (i1~i 12 The second interface is radially and evenly distributed on the side of the valve housing. The angle between two adjacent second interfaces is 30°. Each second interface corresponds to an equally divided position in the valve core, with a total of 12 equally divided positions. The valve core contains 8 channels (a~h channels) and 2 gaps. The inlet of the channel is connected to the first interface correspondingly, and the outlet of the channel is distributed in the first to fourth equally divided positions and the seventh to tenth equally divided positions of the cross section of the valve core. The two gaps are distributed between the fifth to sixth and the eleventh to twelfth equally divided positions of the cross section of the valve core; the top of the valve housing contains four first interfaces i~l, and these four first interfaces are connected to the e~h channel inlets of the valve core through the four circular liquid distribution rings on the top, that is, the i interface is connected to the g channel inlet, the j interface is connected to the e channel inlet, the k interface is connected to the f channel inlet, and the l interface is connected to the h channel inlet. The bottom of the valve housing of the 12-position 8-way valve contains four first interfaces m~p. These four first interfaces are connected to the a~d channel inlets of the valve core through four circular liquid distribution rings at the bottom, that is, the m interface is connected to the c channel inlet, the n interface is connected to the a channel inlet, the o interface is connected to the b channel inlet, and the p interface is connected to the d channel inlet. By rotating the valve core of the 12-position 8-way valve, any two adjacent channel outlets of the valve core can be connected to the second interfaces (i1~i 12 Any two adjacent interfaces are connected, and the gap of the valve core can allow the second interface (i1~i 12 Any two adjacent interfaces are connected.

[0024] Device operation and operation method: When the device is in operation, the eight first interfaces i~p of the valve housing of the twelve-position eight-way valve are connected to the material pipelines respectively. Among them, the j interface is the outlet for the eluent, the k interface is the outlet for the clean water for washing the eluent, the i interface is the inlet for the clean water for washing the eluent, the l interface is the outlet for the raw material liquid, the n interface is the inlet for the raw material liquid, the o interface is the outlet for the clean water for washing the raw material liquid, the m interface is the inlet for the clean water for washing the raw material liquid, and the p interface is the outlet for the eluent. The twelve second interfaces of the twelve-position eight-way valve 9 are respectively connected to the inlets and outlets of the six adsorption columns 10, 11, 12, 13, 14, and 15. When the device is in Figure 1In the state shown, adsorption column 1 10 and adsorption column 2 11 are in a series adsorption state, adsorption column 3 12 is in a water-washing eluent state, adsorption column 4 13 and adsorption column 5 14 are in a series elution state, and adsorption column 6 15 is in a water-washing raw liquid state. When adsorption column 10 is saturated with adsorption, the valve core of the twelve-position eight-way valve rotates counterclockwise by 60°. At this time, adsorption column 2 11 and adsorption column 3 12 are in a series adsorption state, adsorption column 4 13 is in a water-washing eluent state, adsorption column 5 14 and adsorption column 6 15 are in a series elution state, and adsorption column 10 is in a water-washing raw liquid state. At this time, the device state is as follows Figure 3 As shown (the material liquid pipelines before entering the twelve-position eight-way valve are not drawn in the figure). Figure 2 The state of the valve core of the 12-position 8-way valve in A after rotating 60° counterclockwise is as follows Figure 2 As shown in C. When the adsorption column 11 is saturated, the valve core of the twelve-position eight-way valve is rotated 60° counterclockwise again, and the device switches to the next state.

[0025] Example 2

[0026] A continuous adsorption device using a multi-way valve to control material switching is composed of 5 adsorption columns and a 10-position 8-way valve. Since the device contains 5 adsorption columns, that is, n=5, the valve housing of the 10-position 8-way valve contains 2×5=10 second interfaces. The device structure is as follows Figure 4 As shown in the figure (the material liquid pipelines before entering the ten-position eight-way valve are not drawn in the figure), the top perspective view of the ten-position eight-way valve is shown in Figure 5 A. The structure of the ten-position eight-way valve is similar to that of the twelve-position eight-way valve in Example 1. The valve housing of the ten-position eight-way valve has eight first interfaces (i~p interfaces) and ten second interfaces (i1~i 10 Interface), 10 second interfaces are radially evenly distributed on the side of the valve housing, the angle between two adjacent second interfaces is 36°, each second interface corresponds to an equal division position in the valve core, a total of 10 equal division positions, the valve core has 8 channels (a~h channels) and 1 gap, the inlet of the channel is connected to the first interface correspondingly, the channel outlet is distributed in the first to fourth equal division positions and the fifth to eighth equal division positions of the valve core cross section, and 1 gap is distributed between the ninth and tenth equal division positions of the valve core cross section. By rotating the valve core of the ten-position eight-way valve, any two adjacent channel outlets of the valve core can be connected to the second interface (i1~i 10 Any two adjacent interfaces are connected, and the gap of the valve core can allow the second interface (i1~i 10 Any two adjacent interfaces are connected.

[0027] When the device is running, the eight first interfaces at the top and bottom of the valve housing of the ten-position eight-way valve are connected to the material liquid in the same manner as in Example 1. The ten second interfaces of the ten-position eight-way valve 16 are respectively connected to the inlet and outlet of the adsorption column seven 17, the adsorption column eight 18, the adsorption column nine 19, the adsorption column ten 20, and the adsorption column eleven 21. Figure 4 In the embodiment, the adsorption column seven 17 and the adsorption column eight 18 are in a series adsorption state, the adsorption column nine 19 is in a water washing eluent state, the adsorption column ten 20 is in an elution state, and the adsorption column eleven 21 is in a water washing raw liquid state. When the adsorption column seven 17 is saturated with adsorption, the valve core of the ten-position eight-way valve 16 is rotated counterclockwise by 72°. At this time, the adsorption column eight 18 and the adsorption column nine 19 are in a series adsorption state, the adsorption column ten 20 is in a water washing eluent state, the adsorption column eleven 21 is in an elution state, and the adsorption column seven 17 is in a water washing raw liquid state. Figure 5 The state of the valve core of the ten-position eight-way valve 16 shown in A in the figure after rotating 72° counterclockwise is as follows: Figure 5 As shown in B. When the adsorption column 8 18 is saturated with adsorption, the valve core of the ten-position eight-way valve 16 is rotated counterclockwise again by 72°, and the device switches to the next state.

[0028] Example 3

[0029] A continuous adsorption device using a multi-way valve to control material switching is composed of 4 adsorption columns and an 8-position 8-way valve. Since the device contains 4 adsorption columns, that is, n=4, the valve housing of the 8-position 8-way valve contains 2×4=8 second interfaces. Since the valve core of the 8-position 8-way valve contains n-4 notches, the valve core has no notches. The device structure is as follows Figure 6 As shown in the figure (the material liquid pipelines before entering the eight-position eight-way valve are not drawn in the figure), the top perspective view of the eight-position eight-way valve is shown in Figure 7 A. The structure of the eight-position eight-way valve is similar to that of the twelve-position eight-way valve in Example 1. The valve housing of the eight-position eight-way valve has eight first interfaces (i~p interfaces) and eight second interfaces (i1~i8 interfaces). The second interfaces are radially and evenly distributed on the side of the valve housing. The angle between two adjacent second interfaces is 45°. Each second interface corresponds to an equal-division position in the valve core, with a total of eight equal-division positions. The valve core has eight channels (a~h channels), and the channel outlets are distributed on the first to eighth equal-division positions of the valve core cross section. The valve core of the eight-position eight-way valve has no gap, and the eight second interfaces are on the side of the valve housing. By rotating the valve core of the twelve-position eight-way valve, any two adjacent channel outlets of the valve core can be connected to any two adjacent interfaces of the second interfaces (i1~i8 interfaces).

[0030] When the device is running, the eight interfaces at the top and bottom of the valve housing of the eight-position eight-way valve 22 are connected to the material liquid in the same manner as in Example 1. The eight second interfaces of the eight-position eight-way valve 22 are respectively connected to the inlet and outlet of the adsorption column 12 23, the adsorption column 13 24, the adsorption column 14 25, and the adsorption column 15 26. Figure 6 In the embodiment, the adsorption column 12 23, the adsorption column 13 24, the adsorption column 14 25, and the adsorption column 15 26 are respectively in the adsorption state, the water washing eluent state, the elution state, and the water washing raw material liquid state. When the adsorption column 12 23 is saturated with adsorption, the valve core of the eight-position eight-way valve 22 is rotated counterclockwise by 90°. At this time, the adsorption column 12 23 is in the water washing raw material liquid state, and the adsorption column 13 24, the adsorption column 14 25, and the adsorption column 15 26 are respectively in the adsorption state, the water washing eluent state, and the elution state. Figure 7 The state of the valve core of the eight-position eight-way valve shown in A after rotating 90° counterclockwise is as follows Figure 7 As shown in B. When the adsorption column 13 24 is saturated with adsorption, the valve core of the eight-position eight-way valve 22 is rotated 90° counterclockwise again, and the device switches to the next state.

[0031] Example 4

[0032] A continuous adsorption device using a multi-way valve to control material switching, consisting of 6 adsorption columns, 6 six-way valves and 1 twelve-position eight-way valve, the device structure is as follows Figure 8 As shown (the figure does not show the material liquid pipelines before entering the twelve-position eight-way valve). Compared with the adsorption device in Example 1, each six-way valve in the adsorption device is connected to a different adsorption column, and the six-way valve has an a interface, a b interface, a c interface, a d interface, an e interface and an f interface. The a interface and the d interface of the six-way valve 1 28, the six-way valve 2 29, the six-way valve 3 30, the six-way valve 4 31, the six-way valve 5 32, and the six-way valve 6 33 are respectively connected to the inlet and outlet of the adsorption column 16 34, the adsorption column 17 35, the adsorption column 18 36, the adsorption column 19 37, the adsorption column 20 38, and the adsorption column 21 39. The six-way valve 1 28, the six-way valve 2 29, the six-way valve 3 30, the six-way valve 4 31, The b interface and c interface of the six-way valve five 32 and six-way valve six 33 are respectively connected to the second interface of the twelve-position eight-way valve two 27; the e interface of the six-way valve one 28 is connected to the f interface of the six-way valve two 29, the e interface of the six-way valve two 29 is connected to the f interface of the six-way valve three 30, the e interface of the six-way valve three 30 is connected to the f interface of the six-way valve four 31, the e interface of the six-way valve four 31 is connected to the f interface of the six-way valve five 32, the e interface of the six-way valve five 32 is connected to the f interface of the six-way valve six 33, and the f interface of the six-way valve one 28 and the e interface of the six-way valve six 33 are the inlet and outlet of the washing liquid respectively. The top perspective view and the front perspective view of the six-way valve are shown in FIG. Fig. 9 As shown in A and B. Fig. 9 The a interface of all the six-way valves is connected to the b interface, the c interface is connected to the d interface, and the e interface is connected to the f interface. When a certain adsorption column needs to be replaced or repaired, the valve core of the six-way valve connected to the adsorption column is rotated 60° clockwise or counterclockwise to cut the adsorption column out of the device. Fig. 9 The valve core of the six-way valve shown in A is rotated 60° clockwise. Fig. 9 As shown in C. When there is no adsorption column cut out of the device, Figure 8 The operation and operation method of the device are exactly the same as those in Example 1.

[0033] Example 5

[0034] A continuous adsorption device using a multi-way valve to control material switching is composed of 3 adsorption columns, 3 six-way valves and 2 six-position four-way valves. Since the device contains 3 adsorption columns, that is, n=3, the six-position four-way valve housing contains 2×3=6 second interfaces. The device structure is as follows Fig.10 As shown in the figure (the material liquid pipelines before entering the six-position four-way valve are not drawn in the figure), the top view and front view of the six-position four-way valve are shown in Fig.11 A and B in the middle. The six-position four-way valve has a valve core and a valve housing. The valve core can rotate in the valve housing. The valve housing contains 4 first interfaces (e~h interfaces) and 6 second interfaces (i1~i6 interfaces). The second interfaces are evenly arranged radially and located on the side of the valve housing. The angle between two adjacent second interfaces is 60°. Each second interface corresponds to an equal division position in the valve core, and there are 6 equal division positions in total. The valve core contains 4 channels (a~d channels) and 1 gap. The inlet of the channel is connected to the first interface correspondingly. The outlet of the channel is distributed in the first to third equal division positions and the sixth equal division position of the cross section of the valve core. The gap is distributed between the fourth and fifth equal division positions of the cross section of the valve core. The bottom of the valve housing of the six-position four-way valve contains four first interfaces e~h. These four interfaces are connected to the four channel inlets a~d of the valve core through four circular liquid distribution rings at the bottom, that is, the e interface is connected to the d channel inlet, the f interface is connected to the b channel inlet, the g interface is connected to the c channel inlet, and the h interface is connected to the a channel inlet. By rotating the valve core of the six-position four-way valve, any two adjacent channel outlets of the valve core can be connected to any two adjacent interfaces in the second interface, and the notch of the valve core can allow any two adjacent interfaces in the second interface to be connected.

[0035] The operation and operation method of the device: the six-way valve has an a interface, a b interface, a c interface, a d interface, an e interface and an f interface. The a interface and the d interface of the six-way valve 7 42, the six-way valve 8 43, and the six-way valve 9 44 are respectively connected to the inlet and outlet of the adsorption column 22 45, the adsorption column 23 46, and the adsorption column 24 47. The b interface and the c interface of the six-way valve 7 42, the six-way valve 8 43, and the six-way valve 9 44 are respectively connected to the second interface of the six-position four-way valve 1 40. The e interface and the f interface of the six-way valve 7 42, the six-way valve 8 43, and the six-way valve 9 44 are respectively connected to the second interface of the six-position four-way valve 2 41. When the device is running, the four first interfaces e to h of the valve shells of the two six-position four-way valves are respectively connected to the material pipeline. Among them, the e interface of the six-position four-way valve 1 40 is the outlet of the eluent, the h interface is the inlet of the eluent, the f interface is the outlet of the clean water for washing the eluent, and the g interface is the inlet of the clean water for washing the eluent; the e interface of the six-position four-way valve 2 41 is the outlet of the raw material liquid, the h interface is the inlet of the clean water for washing the raw material liquid, the f interface is the outlet of the clean water for washing the raw material liquid, and the g interface is the inlet of the raw material liquid. When the device is in Fig.10 In the state shown, adsorption column 23 46 and adsorption column 24 47 are in a series adsorption state, and adsorption column 22 45 is in an elution state. When adsorption column 23 46 is saturated with adsorption, the valve core of the six-position four-way valve 1 40 is rotated counterclockwise by 120° ( Fig.11 The top perspective view of the six-position four-way valve shown in A is shown in FIG. Fig.11 As shown in C), at this time, adsorption column twenty-three 46 and adsorption column twenty-four 47 continue to be in the series adsorption state, while adsorption column twenty-two 45 is in the water washing eluent state. When the water washing of adsorption column twenty-two 45 is completed, the valve core of the six-position four-way valve two 41 and the valve core of the six-way valve seven 42 are rotated 120° and 60° respectively in clockwise direction. At this time, adsorption column twenty-four 47 and adsorption column twenty-two 45 are in the series adsorption state, and adsorption column twenty-three 46 is in the water washing raw material liquid state. When the water washing of adsorption column twenty-three 46 is completed, the valve core of the six-way valve eight 43 is rotated 60° in clockwise direction. At this time, adsorption column twenty-four 47 and adsorption column twenty-two 45 continue to be in the series adsorption state, while adsorption column twenty-three 46 is in the elution state. Based on the same method, through the combined rotation control of different valves, it is achieved that at any time, there are two adsorption columns in the series adsorption state, and at most only one adsorption column is in the water washing state.

[0036] Example 6

[0037] A continuous adsorption device using a multi-way valve to control material switching is composed of 5 adsorption columns, 5 six-way valves and 2 ten-position four-way valves. Since the device contains 5 adsorption columns, that is, n=5, the ten-position four-way valve housing contains 2×5=10 second interfaces. The device structure is as follows Fig.12 As shown in the figure (the material liquid pipelines before entering the ten-position four-way valve are not drawn in the figure), the top perspective view of the ten-position four-way valve is shown in Fig.13 A. The structure of the ten-position four-way valve is similar to that of the six-position four-way valve in Example 5. The ten-position four-way valve comprises a valve core and a valve housing. The valve core can rotate in the valve housing. The valve housing comprises four first interfaces (e~h interfaces) and ten second interfaces (i1~i 10 Interface), the second interface is radially evenly distributed on the side of the valve housing, and each second interface corresponds to an equal division position in the valve core, with a total of 10 equal division positions. The valve core contains 4 channels (a~d channels) and 3 gaps. The inlet of the channel is connected to the first interface correspondingly, and the channel outlet is distributed in the first to third equal division positions and the eighth equal division position of the valve core cross section. The 3 gaps are distributed between the fourth to fifth, sixth to seventh, and ninth to tenth equal division positions of the valve core cross section. The angle between two adjacent second interfaces is 36°; by rotating the valve core of the ten-position four-way valve, any two adjacent channel outlets of the valve core can be connected to any two adjacent interfaces in the second interface, and the gaps of the valve core can allow any two adjacent second interfaces in the second interface to be connected.

[0038] When the device is running, the four first interfaces e to h of the two ten-position four-way valve housings are connected to the material pipeline respectively, and the connection method is the same as that in Example 5. Fig.12 In the state shown, adsorption column 25 55 and adsorption column 26 56 are in a series elution state, and adsorption column 27 57, adsorption column 28 58, and adsorption column 29 59 are in a series adsorption state. When adsorption column 27 57 is saturated with adsorption, the valve core of the ten-position four-way valve 1 48 is rotated counterclockwise by 72° ( Fig.13 The top perspective view of the 10-position 4-way valve shown in A is shown in FIG. Fig.13 As shown in B), at this time, adsorption column 27 57, adsorption column 28 58, and adsorption column 29 59 continue to be in the series adsorption state, while adsorption column 25 55 is in the water washing eluent state, and adsorption column 26 56 is in the elution state. When the water washing of adsorption column 25 55 is completed, the valve core of the ten-position four-way valve 2 49 and the valve core of the six-way valve 10 50 are rotated clockwise by 72° and 60° respectively, and the six-way valve 11 51, the six-way valve 12 52, the six-way valve 13 53, and the six-way valve 14 54 remain stationary. At this time, adsorption column 28 58, adsorption column 29 59, and adsorption column 25 55 are in the series adsorption state, adsorption column 26 56 is in the elution state, and adsorption column 27 57 is in the water washing raw material liquid state. When the adsorption column 27 57 is washed with water, the valve core of the six-way valve 12 52 is rotated 60° clockwise, and the adsorption columns 28 58, 29 59 and 25 55 continue to be in the series adsorption state, while the adsorption columns 26 56 and 27 57 are in the series elution state. Based on the same method, through the combined rotation control of different valves, it is achieved that at any time, three adsorption columns are in the series adsorption state, and at most only one adsorption column is in the water washing state.

[0039] By changing the number of valve core channels of the feed multi-way valve and the number of first interfaces of the valve housing, the adsorption device only has one water wash, so that only water wash raw liquid or only water wash eluent can be achieved; the water wash raw liquid interface and the water wash eluent interface of the feed multi-way valve housing are combined into one interface, thereby simplifying the valve body structure and reducing the number of material pumps. For example, by reducing Figure 3 The number of valve core channels of the twelve-position eight-way valve and the number of first interfaces of the valve housing in the device shown in the figure make it become a twelve-position six-way valve 60, and obtain Fig.14 The system shown contains only one water wash, and the six adsorption columns are adsorption column 30 61, adsorption column 31 62, adsorption column 32 63, adsorption column 33 64, adsorption column 34 65, and adsorption column 35 66; by reducing Fig.12 The number of valve core channels of the top ten-position four-way valve and the number of first interfaces of the valve housing in the device shown in the figure make it a ten-position two-way valve 67, and obtain Fig.15 The system shown contains only one water wash path, including ten-position four-way valve three 68, six-way valve fifteen 69, six-way valve sixteen 70, six-way valve seventeen 71, six-way valve eighteen 72, six-way valve nineteen 73, adsorption column thirty-six 74, adsorption column thirty-seven 75, adsorption column thirty-eight 76, adsorption column thirty-nine 77, and adsorption column forty 78.

[0040] It should be understood that the detailed description of the technical solution of the present invention by means of the preferred embodiments is illustrative rather than restrictive. Those skilled in the art may modify the technical solutions described in the embodiments, or replace some of the technical features by equivalents, based on reading the specification of the present invention. For example, without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A multi-way valve capable of connecting multiple adsorption columns and controlling material switching, comprising a valve housing and a valve core, characterized in that: The multi-way valve is a 2n-position multi-way valve, connecting the inlet and outlet of n adsorption columns. By rotating the 2n-position multi-way valve core clockwise or counterclockwise by a certain angle, the operating states of different adsorption columns can be switched, and n≥3.

2. The multi-way valve according to claim 1, characterized in that: The 2n-position multi-way valve is a 2n-position eight-way valve, the valve housing contains 8 first interfaces and 2n second interfaces, the second interfaces are radially evenly distributed on the side of the valve housing, the angle between two adjacent second interfaces is (360 / 2n)°, each second interface corresponds to an equally divided position in the valve core, and there are 2n equally divided positions in total. The valve core contains 8 channels and n-4 notches, each channel has an inlet and an outlet, the inlet of the channel is connected to the first interface correspondingly, the channel outlet is distributed in different equally divided positions corresponding to the second interface, and the notch is distributed between other two adjacent equally divided positions. By rotating the valve core of the 2n-position eight-way valve, any two adjacent channel outlets of the valve core can be connected to any two adjacent interfaces in the second interfaces, and the notch of the valve core can allow any two adjacent second interfaces in the second interface to be connected, and n≥4.

3. The multi-way valve according to claim 1, characterized in that: The multi-way valve is a 2n-position four-way valve, the valve housing contains 4 first interfaces and 2n second interfaces, the second interfaces are radially evenly distributed on the side of the valve housing, the angle between two adjacent second interfaces is (360 / 2n)°, each second interface corresponds to an equally divided position in the valve core, and there are 2n equally divided positions in total. The valve core contains 4 channels and n-2 notches, each channel has an inlet and an outlet, the inlet of the channel is connected to the first interface correspondingly, the channel outlet is distributed at different equally divided positions corresponding to the second interface, and the notch is distributed between other two adjacent equally divided positions. By rotating the valve core of the 2n-position four-way valve, any two adjacent channel outlets of the valve core can be connected to any two adjacent interfaces in the second interfaces, and the notch of the valve core can allow any two adjacent interfaces in the second interfaces to be connected, and n≥3.

4. A continuous adsorption device based on the 2n-position multi-way valve according to claim 1, characterized in that: It includes multiple adsorption columns and multiple 2n-position multi-way valves for controlling material entry and switching. Through the combined control of the 2n-position multi-way valves, adsorption, water washing or elution of different adsorption columns can be achieved.

5. The continuous adsorption device according to claim 4, characterized in that: The invention comprises n adsorption columns and a 2n-position eight-way valve for controlling material entry into the device, wherein the 2n second interfaces of the 2n-position eight-way valve are respectively connected with the inlets and outlets of the n adsorption columns in sequence, and by rotating the valve core of the 2n-position eight-way valve, any two adjacent channels of the valve core can be connected with any two adjacent interfaces of the second interfaces, and the notch of the valve core can allow any two adjacent second interfaces to be connected, and when the device is running, the eight second interfaces of the valve shell of the 2n-position eight-way valve are respectively the raw material liquid inlet, the raw material liquid outlet, the eluent inlet, the eluent outlet, the clean water inlet for washing the raw material liquid, the clean water outlet for washing the raw material liquid, the clean water inlet for washing the eluent, and the clean water outlet for washing the eluent, and the operating state switching of different adsorption columns is realized by rotating the valve core of the 2n-position eight-way valve clockwise or counterclockwise (360 / n)°, and n≥4.

6. The continuous adsorption device according to claim 4, characterized in that: The device comprises n adsorption columns, n six-way valves and two 2n-position four-way valves for controlling materials to enter the device, wherein the six-way valves have an a interface, a b interface, a c interface, a d interface, an e interface and an f interface, each of the six-way valves is connected to a different adsorption column, the a interface and the d interface of the six-way valve are respectively connected to the inlet and the outlet of the adsorption column, the b interface and the c interface of each six-way valve are respectively connected to the second interface of one of the 2n-position four-way valves in sequence, the e interface and the f interface of each six-way valve are respectively connected to the second interface of another 2n-position four-way valve in sequence, When the device is in operation, the four first interfaces of one of the 2n-position four-way valves are correspondingly the raw material liquid inlet, raw material liquid outlet, clean water inlet for washing the raw material liquid, and clean water outlet for washing the raw material liquid; the four first interfaces of the other 2n-position four-way valve are correspondingly the eluent inlet, eluent outlet, clean water inlet for washing the eluent, and clean water outlet for washing the eluent; by simultaneously rotating the valve core of the corresponding 2n-position four-way valve (360 / n)° and the valve core of the six-way valve 60° clockwise or counterclockwise, the switching of different adsorption column operating states is achieved, and n≥3.

7. The continuous adsorption device according to claim 5, characterized in that: The device further comprises n six-way valves, each of which is connected to a different adsorption column. The six-way valve has an a interface, a b interface, a c interface, a d interface, an e interface and an f interface. The a interface and the d interface of the six-way valve are respectively connected to the inlet and the outlet of the adsorption column, and the b interface and the c interface of each six-way valve are respectively connected to the second interface of the 2n-position eight-way valve in sequence; the e interface and the f interface of adjacent six-way valves are connected, and the f interface of the six-way valve connected to the first-stage adsorption column and the e interface of the six-way valve connected to the last-stage adsorption column are respectively the inlet and the outlet of the water washing liquid. When the device is in operation, the valve core of the six-way valve connected to the corresponding adsorption column is rotated 60° clockwise or counterclockwise to cut the adsorption column out of the device.

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