A multi-way valve capable of connecting multiple adsorption columns and controlling material switching and its continuous adsorption device

Abstract

The present invention belongs to the field of adsorption, and discloses a multi-way valve capable of connecting multiple adsorption columns and controlling material switching and its continuous adsorption device. The device mainly consists of an adsorption column, a six-way valve and a feed multi-way valve. By combining multiple adsorption columns with one feed multi-way valve, or combining multiple adsorption columns with multiple six-way valves and two feed multi-way valves, continuous adsorption under different functions is achieved. The number of adsorption columns can be increased or decreased according to specific requirements. Compared with the traditional fixed-bed adsorption system, the number of valves is small and the logic control is simple; compared with the continuous moving-bed adsorption system, the device replaces the rotation of the adsorption column by rotating control of the multi-way valve, simplifies the structure and reduces the operating energy consumption. The device can realize the simultaneous washing and elution, and can also realize the intermittent operation of washing and elution by the combined control of the feed multi-way valve and the six-way valve, thereby reducing the number of adsorption columns and the use of adsorption materials, and finally reducing the system cost.

Description

Technical Field

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

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

[0003] Chinese Patent CN102031368A discloses a continuous ion exchange device and method for extracting lithium from salt lake brine. The resin columns are connected in series through a series pipeline in sequence, and an adsorption resin column group and a rapid elution resin column group that move in sequence and circulate are formed. Control valves are respectively arranged on each feed branch pipe and discharge branch pipe to coordinately control the processes of ion exchange, washing, elution and resin regeneration among the resin column groups in turn. Chinese Patent CN114892025A discloses a simulated moving bed lithium extraction adsorption process. A plurality of adsorption columns are arranged in an adsorption bed, and by controlling the valves, the adsorption columns are sequentially in the adsorption stage, elution stage, desorption stage and water washing stage in sequence and operate in a cycle. At any time period, 3n adsorption columns are maintained in the adsorption stage, and N adsorption columns are in the elution stage, desorption stage, water washing stage or are used as blanks, where n is a natural number not less than 2, and N is a non-zero natural number less than n. Although these technologies can achieve 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 deficiencies of the prior art, and provide a multi-way valve capable of connecting multiple adsorption columns and controlling material switching and its continuous adsorption device. By using the multi-way valve to control the entry and switching of materials, the number of valves is reduced, and the adsorption, water washing or elution of different adsorption columns and the continuous operation of the adsorption process are realized.

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

[0006] The first aspect of the present invention provides a multi-way valve, which includes a valve housing and a valve core. The multi-way valve is a 2n-way valve (n≥3), connecting the inlets and outlets of n adsorption columns, and by rotating the 2n-way valve core clockwise or counterclockwise by a certain angle, the switching of the operating states of different adsorption columns is realized.

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

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

[0009] In the second aspect of the present invention, a continuous adsorption device based on the 2n-way multi-way valve is provided, which includes a plurality of adsorption columns and a plurality of multi-way valves for controlling the entry and switching of materials. By combining and controlling the multi-way valves, adsorption, water washing, or elution of different adsorption columns can be achieved.

[0010] Further, the continuous adsorption device includes n (n≥4) adsorption columns and 1 2n-way eight-way valve for controlling the material entry device. The 2n second interfaces of the 2n-way eight-way valve are sequentially connected to the inlets and outlets of the n adsorption columns respectively. By rotating the valve core of the 2n-way eight-way valve, any two adjacent channels of the valve core can be connected to any two adjacent interfaces among the second interfaces, and the notches of the valve core can allow any two adjacent second interfaces to be connected.

[0011] Further, the continuous adsorption device includes n (n≥3) adsorption columns, n six-way valves, and two 2n-position four-way valves for controlling the entry of materials into the device. The valve housing of the 2n-position four-way valve has 4 first interfaces and 2n second interfaces. The six-way valve has interfaces a, b, c, d, e, and f. Each six-way valve is connected to a different adsorption column, where interfaces a and d of the six-way valve are respectively connected to the inlet and outlet of the adsorption column. The b and c interfaces of each six-way valve are respectively and sequentially connected to the second interfaces of one of the 2n-position four-way valves, and the e and f interfaces of each six-way valve are respectively and sequentially connected to the second interfaces of the other 2n-position four-way valve.

[0012] Further, the continuous adsorption device comprises n (n≥4) adsorption columns, one 2n-position eight-way valve for controlling the entry of materials into the device, and n six-way valves. Each six-way valve is connected to a different adsorption column. The six-way valve has interfaces a, b, c, d, e, and f. The a and d interfaces of the six-way valve are respectively connected to the inlet and outlet of the adsorption column. The b and c interfaces of each six-way valve are respectively and sequentially connected to the second interfaces of the 2n-position eight-way valve; the e and f interfaces of adjacent six-way valves are connected. 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 water washing liquid inlet and the water washing liquid outlet.

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

[0014] When the continuous adsorption device including n (n≥4) adsorption columns and one 2n-position eight-way valve for controlling the entry of materials into the device is in operation, the eight second interfaces of the valve housing 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 clear water inlet for washing the raw material liquid, the clear water outlet for washing the raw material liquid, the clear water inlet for washing the eluent, and the clear water outlet for washing the eluent. By rotating the valve core of the 2n-position eight-way valve clockwise or counterclockwise by (360 / n)°, the switching of the operating states of different adsorption columns is realized.

[0015] When the continuous adsorption device including n (n≥3) adsorption columns, n six-way valves, and two 2n-position four-way valves for controlling the entry of materials into the device is in operation, the four first interfaces of the valve housing of one of the 2n-position four-way valves are respectively the raw material liquid inlet, the raw material liquid outlet, the clear water inlet for washing the raw material liquid, and the clear water outlet for washing the raw material liquid. The four first interfaces of the valve housing of the other 2n-position four-way valve are respectively the eluent inlet, the eluent outlet, the clear water inlet for washing the eluent, and the clear water outlet for washing the eluent. By simultaneously rotating the valve cores of the corresponding 2n-position four-way valves clockwise or counterclockwise by (360 / n)° and the valve cores of the six-way valves by 60°, the switching of the operating states of different adsorption columns is realized.

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

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

[0018] The continuous adsorption device of the present invention uses six-way valves and multi-way feed valves to replace the traditional two-way valves, greatly reducing the number of valves and simplifying the device structure and control logic; the device is easy to increase or decrease the number of adsorption columns, and the operation logic of the device remains unchanged after the increase or decrease; the continuous adsorption device can realize the simultaneous washing and elution, and can also realize the intermittent operation of washing and elution by the combined control of the multi-way feed valve and the six-way valve, thereby reducing the number of adsorption columns and lowering the system cost; during the operation of the continuous adsorption device, only the rotation operation of a limited number of valves is involved, which is easy to realize automation. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the adsorption device in Embodiment 1;

[0020] Figure 2 It is a schematic structural diagram of the twelve-position eight-way valve in Embodiment 1, where 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 counterclockwise by 60°;

[0021] Figure 3 It is a schematic structural diagram of another adsorption state of the adsorption device in Embodiment 1;

[0022] Figure 4 It is a schematic structural diagram of the adsorption device in Embodiment 2;

[0023] Figure 5 It is a schematic structural diagram of the ten-position eight-way valve in Embodiment 2, where 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 counterclockwise by 72°;

[0024] Figure 6 It is a schematic structural diagram of the adsorption device in Embodiment 3;

[0025] Figure 7 It is a schematic structural diagram of the eight-position eight-way valve in Embodiment 3, where 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 counterclockwise by 90°;

[0026] Figure 8 It is a schematic structural diagram of the adsorption device in Embodiment 4;

[0027] Figure 9Schematic diagram of the structure of the six-way valve in Example 4, where A is the top perspective view of the six-way valve; B is the front perspective view of the six-way valve; C is the top perspective view of the six-way valve after the valve core rotates 60° clockwise;

[0028] Figure 10 Schematic diagram of the structure of the adsorption device in Example 5;

[0029] Figure 11 Schematic diagram of the structure of the six-position four-way valve in Example 5, where A is the top perspective view of the six-position four-way valve; B is the front perspective view of the six-position four-way valve; C is the top perspective view of the six-position four-way valve after the valve core rotates 120° counterclockwise;

[0030] Figure 12 Schematic diagram of the structure of the adsorption device in Example 6;

[0031] Figure 13 Schematic diagram of the structure of the ten-position four-way valve in Example 6, where A is the top perspective view of the ten-position four-way valve; B is the top perspective view of the ten-position four-way valve after the valve core rotates 72° counterclockwise;

[0032] Figure 14 Schematic diagram of the structure of the adsorption device with only one-way water washing Figure 1 ;

[0033] Figure 15 Schematic diagram of the structure of the adsorption device with only one-way water washing Figure 2 .

[0034] Description of reference numerals in the figure: 1 to 4 are successively the raw material liquid inlet, the eluent inlet, the clear water inlet for washing the raw material liquid, and the clear water inlet for washing the eluent; 5 to 8 are successively the raw material liquid outlet, the eluent outlet, the clear water outlet for washing the raw material liquid, and the clear 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 an adsorption column twenty-seven, 58 is an adsorption column twenty-eight, 59 is an adsorption column twenty-nine, 60 is a twelve-position six-way valve; 61 is an adsorption column thirty, 62 is an adsorption column thirty-one, 63 is an adsorption column thirty-two, 64 is an adsorption column thirty-three, 65 is an adsorption column thirty-four, 66 is an adsorption column thirty-five, 67 is a ten-position two-way valve, 68 is a ten-position four-way valve three, 69 is a six-way valve fifteen, 70 is a six-way valve sixteen, 71 is a six-way valve seventeen, 72 is a six-way valve eighteen, 73 is a six-way valve nineteen, 74 is an adsorption column thirty-six, 75 is an adsorption column thirty-seven, 76 is an adsorption column thirty-eight, 77 is an adsorption column thirty-nine, 78 is an adsorption column forty. Detailed implementation manners

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive and not restrictive, and the protection scope of the present invention cannot be limited thereby.

[0036] Example 1

[0037] A continuous adsorption device for controlling material switching by using a multi-way valve is composed of 6 adsorption columns and 1 twelve-position eight-way valve. Since the device contains 6 adsorption columns, that is, n = 6, the valve housing of the twelve-position eight-way valve contains 2×6 = 12 second interfaces. The device structure is as Figure 1As shown, the top view perspective and front view perspective of the twelve-position eight-way valve are shown in A and B of Figure 2 respectively. The twelve-position eight-way valve includes a valve housing and a valve core. The valve core can rotate within the valve housing. The valve housing has 8 first interfaces (i - p interfaces) and 12 second interfaces (i 1 ~i 12 interfaces). The second interfaces are radially and evenly distributed on the side surface of the valve housing. The included angle between two adjacent second interfaces is 30°. Each second interface corresponds to an equally divided position within the valve core, with a total of 12 equally divided positions. The valve core contains 8 channels (a - h channels) and 2 notches. The inlets of the channels are correspondingly connected to the first interfaces. The outlets of the channels are distributed at the first to fourth equally divided positions and the seventh to tenth equally divided positions of the cross-section of the valve core. The 2 notches 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. These four first interfaces are respectively connected to the inlets of the e - h channels of the valve core through four circular liquid distribution rings at the top, that is, the i interface is connected to the inlet of the g channel, the j interface is connected to the inlet of the e channel, the k interface is connected to the inlet of the f channel, and the l interface is connected to the inlet of the h channel. The bottom of the valve housing of the twelve-position eight-way valve contains four first interfaces m - p. These four first interfaces are respectively connected to the inlets of the a - d channels of the valve core through four circular liquid distribution rings at the bottom, that is, the m interface is connected to the inlet of the c channel, the n interface is connected to the inlet of the a channel, the o interface is connected to the inlet of the b channel, and the p interface is connected to the inlet of the d channel. 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 among the second interfaces (i 1 ~i 12 interfaces), and the notches of the valve core can allow any two adjacent interfaces among the second interfaces (i 1 ~i 12 interfaces) to be connected.

[0038] Device operation and operation method: When the device is operating, the eight first interfaces i - p of the valve housing of the twelve-position eight-way valve are respectively connected to the material pipelines. Among them, the j interface is the eluent outlet, the k interface is the clear water outlet for washing the eluent, the i interface is the clear water inlet for washing the eluent, the l interface is the raw material liquid outlet, the n interface is the raw material liquid inlet, the o interface is the clear water outlet for washing the raw material liquid, the m interface is the clear water inlet for washing the raw material liquid, and the p interface is the eluent outlet. The 12 second interfaces of the twelve-position eight-way valve 9 are successively connected to the inlets and outlets of 6 adsorption columns 10, adsorption column 11, adsorption column 12, adsorption column 13, adsorption column 14, and adsorption column 15 respectively. When the device is in Figure 1In the state shown, the first adsorption column 10 and the second adsorption column 11 are in series adsorption state, the third adsorption column 12 is in the state of washing eluent, the fourth adsorption column 13 and the fifth adsorption column 14 are in series elution state, and the sixth adsorption column 15 is in the state of washing raw material liquid. When the first adsorption column 10 is saturated with adsorption, the valve core of the twelve-position eight-way valve rotates counterclockwise by 60°. At this time, the second adsorption column 11 and the third adsorption column 12 are in series adsorption state, the fourth adsorption column 13 is in the state of washing eluent, the fifth adsorption column 14 and the sixth adsorption column 15 are in series elution state, and the first adsorption column 10 is in the state of washing raw material liquid. The device state at this time is as Figure 3 shown (the pipelines of each material liquid before entering the twelve-position eight-way valve are not drawn in the figure). Figure 2 The state after the valve core of the twelve-position eight-way valve in A rotates counterclockwise by 60° is as Figure 2 shown in C. When the second adsorption column 11 is saturated with adsorption, the valve core of the twelve-position eight-way valve is rotated counterclockwise by 60° again, and the device switches to the next state.

[0039] Example 2

[0040] A continuous adsorption device using a multi-way valve to control material switching is composed of 5 adsorption columns and 1 ten-position eight-way valve. Since the device contains 5 adsorption columns, that is, n = 5, the valve housing of the ten-position eight-way valve contains 2×5 = 10 second interfaces. The device structure is as Figure 4 shown (the pipelines of each material liquid before entering the ten-position eight-way valve are not drawn in the figure). The top view perspective of the ten-position eight-way valve is shown in Figure 5 A in the figure. The structure of the ten-position eight-way valve is similar to the structure of the twelve-position eight-way valve in Example 1. The valve housing of the ten-position eight-way valve has 8 first interfaces (i~p interfaces) and 10 second interfaces (i 1 ~i 10 interfaces). The 10 second interfaces are radially evenly distributed on the side of the valve housing, and the angle between adjacent two second interfaces is 36°. Each second interface corresponds to an equal division position in the valve core, with a total of 10 equal division positions. The valve core has 8 channels (a~h channels) and 1 notch. The inlets of the channels are correspondingly connected to the first interfaces, and the outlets of the channels are distributed at the first to fourth equal division positions and the fifth to eighth equal division positions of the cross-section of the valve core. 1 notch is distributed between the ninth and tenth equal division positions of the cross-section of the valve core. 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 any two adjacent interfaces among the second interfaces (i 1 ~i 10 interfaces), and the notch of the valve core can allow any two adjacent interfaces among the second interfaces (i 1 ~i 10 interfaces) to be connected.

[0041] When the device is running, the connection mode between the eight first interfaces at the top and bottom of the valve housing of the ten-position eight-way valve and each material liquid is the same as that in Embodiment 1. The 10 second interfaces of the ten-position eight-way valve 16 are successively connected to the inlets and outlets of the seventh adsorption column 17, the eighth adsorption column 18, the ninth adsorption column 19, the tenth adsorption column 20, and the eleventh adsorption column 21 respectively. Figure 4 Among them, the seventh adsorption column 17 and the eighth adsorption column 18 are in a series adsorption state, the ninth adsorption column 19 is in a state of washing eluent, the tenth adsorption column 20 is in an elution state, and the eleventh adsorption column 21 is in a state of washing raw material liquid. When the seventh adsorption column 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 eighth adsorption column 18 and the ninth adsorption column 19 are in a series adsorption state, the tenth adsorption column 20 is in a state of washing eluent, the eleventh adsorption column 21 is in an elution state, and the seventh adsorption column 17 is in a state of washing raw material liquid. Figure 5 The state of the valve core of the ten-position eight-way valve 16 shown in A after being rotated counterclockwise by 72° is as Figure 5 shown in B. When the eighth adsorption column 18 is saturated with adsorption, the valve core of the ten-position eight-way valve 16 is rotated counterclockwise by 72° again, and the device switches to the next state.

[0042] Embodiment 3

[0043] A continuous adsorption device for controlling material switching by using a multi-way valve is composed of 4 adsorption columns and 1 eight-position eight-way valve. Since the device contains 4 adsorption columns, that is, n = 4, the valve housing of the eight-position eight-way valve contains 2×4 = 8 second interfaces. Since the valve core of the eight-position eight-way valve contains n - 4 notches, the valve core has no notches. The device structure is as Figure 6 shown (the pipelines of each material liquid before entering the eight-position eight-way valve are not drawn in the figure), and the top view perspective of the eight-position eight-way valve is shown in Figure 7 A in the figure. The structure of the eight-position eight-way valve is similar to the structure of the twelve-position eight-way valve in Embodiment 1. The valve housing of the eight-position eight-way valve has 8 first interfaces (i~p interfaces) and 8 second interfaces (i 1 ~i 8 interfaces). The second interfaces are radially and evenly distributed on the side of the valve housing, and the included 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 8 equal division positions. The valve core has 8 channels (a~h channels), and the channel outlets are distributed at 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 notches, 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 among the second interfaces (i 1 ~i 8 interfaces).

[0044] When the device is running, the eight interfaces at the top and bottom of the valve housing of the eight-way eight-port valve 22 are connected to each material liquid in the same way as in Embodiment 1. The eight second interfaces of the eight-way eight-port valve 22 are successively connected to the inlets and outlets of the adsorption column twelve 23, the adsorption column thirteen 24, the adsorption column fourteen 25, and the adsorption column fifteen 26 respectively. Figure 6 Among them, the adsorption column twelve 23, the adsorption column thirteen 24, the adsorption column fourteen 25, and the adsorption column fifteen 26 are in the adsorption state, the water washing eluent state, the elution state, and the water washing raw material liquid state respectively. When the adsorption column twelve 23 is saturated with adsorption, the valve core of the eight-way eight-port valve 22 is rotated counterclockwise by 90°. At this time, the adsorption column twelve 23 is in the water washing raw material liquid state, while the adsorption column thirteen 24, the adsorption column fourteen 25, and the adsorption column fifteen 26 are in the adsorption state, the water washing eluent state, and the elution state respectively. Figure 7 The state after the valve core of the eight-way eight-port valve shown in A is rotated counterclockwise by 90° is as Figure 7 shown in B. When the adsorption column thirteen 24 is saturated with adsorption, the valve core of the eight-way eight-port valve 22 is rotated counterclockwise by 90° again, and the device switches to the next state.

[0045] Embodiment 4

[0046] A continuous adsorption device for controlling material switching by using a multi-way valve is composed of 6 adsorption columns, 6 six-way valves, and 1 twelve-way eight-port valve. The device structure is as Figure 8 shown (the pipelines of each material liquid before entering the twelve-way eight-port valve are not drawn in the figure). Compared with the adsorption device in Embodiment 1, in this adsorption device, each six-way valve 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 interfaces and d interfaces of the six-way valve one 28, the six-way valve two 29, the six-way valve three 30, the six-way valve four 31, the six-way valve five 32, and the six-way valve six 33 are respectively connected to the inlets and outlets of the adsorption column sixteen 34, the adsorption column seventeen 35, the adsorption column eighteen 36, the adsorption column nineteen 37, the adsorption column twenty 38, and the adsorption column twenty-one 39. The b interfaces and c interfaces of the six-way valve one 28, the six-way valve two 29, the six-way valve three 30, the six-way valve four 31, the six-way valve five 32, and the six-way valve six 33 are respectively connected to the second interfaces of the twelve-way eight-port valve two 27 in sequence; the e interface of the six-way valve one 28 is communicated with the f interface of the six-way valve two 29, the e interface of the six-way valve two 29 is communicated with the f interface of the six-way valve three 30, the e interface of the six-way valve three 30 is communicated with the f interface of the six-way valve four 31, the e interface of the six-way valve four 31 is communicated with the f interface of the six-way valve five 32, the e interface of the six-way valve five 32 is communicated with 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 respectively the water washing liquid inlet and outlet. The top view perspective and the front view perspective of the six-way valve are respectively shown in Figure 9 A and B. Figure 9The a interfaces, b interfaces, c interfaces, d interfaces, e interfaces and f interfaces of all the six-way valves in [device name] are connected. When a certain adsorption column needs to be replaced, repaired, etc., 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. Figure 9 The state after the valve core of the six-way valve shown in A in [device name] is rotated 60° clockwise is shown in Figure 9 C in [device name]. When there is no adsorption column cutting device, Figure 8 the operation and operation method of the device in [device name] are exactly the same as those in Embodiment 1.

[0047] Embodiment 5

[0048] A continuous adsorption device for controlling material switching by using multi-way valves, which consists 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 valve housing of the six-position four-way valve contains 2×3 = 6 second interfaces. The device structure is as shown in Figure 10 shown (the material liquid pipelines before entering the six-position four-way valve are not drawn in the figure). The top view perspective and front view perspective of the six-position four-way valve are shown in Figure 11 A and B in [device name]. 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 (i 1 ~i 6 interfaces). The second interfaces are evenly arranged radially and are located on the side of the valve housing. The angle between two adjacent second interfaces is 60°. Each second interface corresponds to an equally divided position in the valve core, with a total of 6 equally divided positions. The valve core contains 4 channels (a~d channels) and 1 notch. The inlets of the channels are correspondingly connected to the first interfaces. The outlets of the channels are distributed at the first to third equally divided positions and the sixth equally divided position of the cross-section of the valve core. The notch is distributed between the fourth and fifth equally divided 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 respectively connected to the inlets of the four channels a~d of the valve core through four circular liquid distribution rings at the bottom, that is, the e interface is connected to the inlet of the d channel, the f interface is connected to the inlet of the b channel, the g interface is connected to the inlet of the c channel, and the h interface is connected to the inlet of the a channel. 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 among the second interfaces, and the notch of the valve core can allow any two adjacent interfaces among the second interfaces to be connected.

[0049] Device operation and operation method: The six-way valve has interfaces a, b, c, d, e, and f. The a and d interfaces of six-way valve seven 42, six-way valve eight 43, and six-way valve nine 44 are respectively connected to the inlets and outlets of adsorption column twenty-two 45, adsorption column twenty-three 46, and adsorption column twenty-four 47. The b and c interfaces of six-way valve seven 42, six-way valve eight 43, and six-way valve nine 44 are respectively and sequentially connected to the second interface of six-way four-way valve one 40. The e and f interfaces of six-way valve seven 42, six-way valve eight 43, and six-way valve nine 44 are respectively and sequentially connected to the second interface of six-way four-way valve two 41. When the device is running, the four first interfaces e~h of the two six-way four-way valve housings are respectively connected to the material pipelines. Among them, the e interface of six-way four-way valve one 40 is the eluent outlet, the h interface is the eluent inlet, the f interface is the clear water outlet for washing the eluent, and the g interface is the clear water inlet for washing the eluent; the e interface of six-way four-way valve two 41 is the raw material liquid outlet, the h interface is the clear water inlet for washing the raw material liquid, the f interface is the clear water outlet for washing the raw material liquid, and the g interface is the raw material liquid inlet. When the device is in Figure 10 the state shown, adsorption column twenty-three 46 and adsorption column twenty-four 47 are in series adsorption state, and adsorption column twenty-two 45 is in the elution state. When adsorption column twenty-three 46 is saturated with adsorption, rotate the valve core of six-way four-way valve one 40 counterclockwise by 120° ( Figure 11 The top view perspective view of the valve core of the six-way four-way valve shown in A after rotating counterclockwise by 120° can be seen in Figure 11 as shown in C). At this time, adsorption column twenty-three 46 and adsorption column twenty-four 47 continue to be in series adsorption state, while adsorption column twenty-two 45 is in the state of washing the eluent with clear water. When the washing of adsorption column twenty-two 45 is completed, rotate the valve core of six-way four-way valve two 41 clockwise by 120° and the valve core of six-way valve seven 42 clockwise by 60° simultaneously. At this time, adsorption column twenty-four 47 and adsorption column twenty-two 45 are in series adsorption state, and adsorption column twenty-three 46 is in the state of washing the raw material liquid with clear water. When the washing of adsorption column twenty-three 46 is completed, rotate the valve core of six-way valve eight 43 clockwise by 60°. At this time, adsorption column twenty-four 47 and adsorption column twenty-two 45 continue to be in 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 realized that at any time, two adsorption columns are in series adsorption state, and at most only one adsorption column is in the state of washing with clear water.

[0050] Example 6

[0051] A continuous adsorption device for controlling material switching using multi-way valves, which consists of 5 adsorption columns, 5 six-way valves, and 2 ten-way four-way valves. Since the device contains 5 adsorption columns, that is, n = 5, the ten-way four-way valve housing contains 2×5 = 10 second interfaces. The device structure is as shown in Figure 12 shown (the material liquid pipelines before entering the ten-way four-way valve are not drawn in the figure). The top view perspective view of the ten-way four-way valve can be seen inFigure 13 Among them, A. The structure of the ten-way four-way valve is similar to that of the six-way four-way valve in Embodiment 5. The ten-way four-way valve has a valve core and a valve housing. The valve core can rotate within the valve housing. The valve housing includes 4 first interfaces (interfaces e to h) and 10 second interfaces ( 1 ~i 10 interfaces). The second interfaces are radially and evenly distributed on the side surface of the valve housing. Each second interface corresponds to an equally divided position within the valve core, with a total of 10 equally divided positions. The valve core contains 4 channels (channels a to d) and 3 notches. The inlets of the channels are correspondingly connected to the first interfaces. The outlets of the channels are distributed at the first to third equally divided positions and the eighth equally divided position of the cross-section of the valve core. The 3 notches are distributed between the fourth to fifth, sixth to seventh, and ninth to tenth equally divided positions of the cross-section of the valve core. The angle between any two adjacent second interfaces is 36°. By rotating the valve core of the ten-way four-way valve, any two adjacent channel outlets of the valve core can be connected to any two adjacent interfaces among the second interfaces, and the notches of the valve core can allow any two adjacent second interfaces among the second interfaces to be connected.

[0052] During the operation of the device, the four first interfaces e to h of the valve housings of the 2 ten-way four-way valves are respectively connected to the material pipelines, and the connection method is the same as that in Embodiment 5. When the device is in the Figure 12 shown state, the adsorption columns twenty-five 55 and twenty-six 56 are in a series elution state, and the adsorption columns twenty-seven 57, twenty-eight 58, and twenty-nine 59 are in a series adsorption state. When the adsorption column twenty-seven 57 is saturated with adsorption, rotate the valve core of the ten-way four-way valve one 48 counterclockwise by 72° ( Figure 13 The top view perspective of the valve core of the ten-way four-way valve shown in A after rotating counterclockwise by 72° is shown in Figure 13As shown in B, at this time, the adsorption columns 27, 28, and 29 continue to be in a series adsorption state, while the adsorption column 25 is in the state of washing the eluent and the adsorption column 26 is in the elution state. After the adsorption column 25 is washed, the spool of the ten-way four-way valve 49 is rotated clockwise by 72° and the spool of the six-way valve 50 is rotated clockwise by 60° simultaneously. The six-way valves 51, 52, 53, and 54 remain stationary. At this time, the adsorption columns 28, 29, and 25 are in a series adsorption state, the adsorption column 26 is in the elution state, and the adsorption column 27 is in the state of washing the raw material liquid. After the adsorption column 27 is washed, the spool of the six-way valve 52 is rotated clockwise by 60°. At this time, the adsorption columns 28, 29, and 25 continue to be in a series adsorption state, while the adsorption columns 26 and 27 are in a series elution state. Based on the same method, through the combined rotation control of different valves, it is realized that at any time, three adsorption columns are in a series adsorption state, and at most only one adsorption column is in the washing state.

[0053] By changing the number of spool channels of the feed multi-way valve and the number of the first interfaces of the valve housing, the adsorption device only contains one-way washing, so as to realize only washing the raw material liquid or only washing the eluent; the water-washing raw material liquid interface and the water-washing eluent interface of the valve housing of the feed multi-way valve 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 spool channels of the twelve-way eight-way valve and the number of the first interfaces of the valve housing in the device shown, it is changed into a twelve-way six-way valve 60 to obtain Figure 14 the system with only one-way washing shown, and the 6 adsorption columns are respectively the adsorption column 61, the adsorption column 62, the adsorption column 63, the adsorption column 64, the adsorption column 65, and the adsorption column 66; by reducing Figure 12 the number of spool channels of the top ten-way four-way valve and the number of the first interfaces of the valve housing in the device shown, it is changed into a ten-way two-way valve 67 to obtain Figure 15 the system with only one-way washing shown, including the ten-way four-way valve 68, the six-way valve 69, the six-way valve 70, the six-way valve 71, the six-way valve 72, the six-way valve 73, the adsorption column 74, the adsorption column 75, the adsorption column 76, the adsorption column 77, and the adsorption column 78.

[0054] It should be understood that the detailed description of the technical solutions of the present invention by means of the preferred embodiments above is illustrative rather than restrictive. Based on reading the specification of the present invention, those skilled in the art can modify the technical solutions recorded in each embodiment or make equivalent replacements for some of the technical features. For example, without departing from the spirit and scope of the present invention, the present invention will also have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A continuous adsorption device based on a 2n-position multi-way valve, characterized in that: The invention comprises a plurality of adsorption columns and a plurality of 2n-position multi-way valves for controlling the entry and switching of materials, and the adsorption, water washing or elution of different adsorption columns can be realized by combined control of the 2n-position multi-way valve; the number of the adsorption columns is n, the 2n-position multi-way valve is a 2n-position eight-way valve, the number of the 2n-position eight-way valve is 1, the 2n-position eight-way valve comprises a valve housing and a valve core, the valve housing comprises 8 first interfaces and 2n second interfaces, the second interfaces are radially and 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 comprises 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 outlet of the channel is distributed at different equally divided positions corresponding to the second interface, the notches are distributed between other two adjacent equally divided positions, and the valve core of the 2n-position eight-way valve can be rotated to open. Any two adjacent channel outlets can be connected to any two adjacent interfaces in the second interface, and the gap of the valve core can allow any two adjacent second interfaces in the second interface to be connected, the 2n second interfaces of the 2n-position eight-way valve are respectively connected to the inlet and outlet of n adsorption columns in turn, 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 in the second interface, and the gap of the valve core can allow any two adjacent second interfaces to be connected, when the device is running, the 8 second interfaces of the valve shell of the 2n-position eight-way valve are respectively the raw material liquid inlet, raw material liquid outlet, eluent inlet, eluent outlet, clean water inlet for washing raw material liquid, clean water outlet for washing raw material liquid, clean water inlet for washing eluent, and clean water outlet for washing eluent, and the valve core of the 2n-position eight-way valve is rotated clockwise or counterclockwise (360 / n)° to achieve switching of different adsorption column operating states, and n≥4.

2. The continuous adsorption device according to claim 1, 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.

3. A continuous adsorption device based on a 2n-position multi-way valve, characterized in that: The invention comprises a plurality of adsorption columns and a plurality of 2n-position multi-way valves for controlling the entry and switching of materials, and the adsorption, water washing or elution of different adsorption columns are realized by combined control of the 2n-position multi-way valves; the number of the adsorption columns is n, the 2n-position multi-way valve is a 2n-position four-way valve, the number of the 2n-position four-way valves is 2, and the n six-way valves are also included, the 2n-position four-way valve comprises a valve housing and a valve core, the valve housing comprises 4 first interfaces and 2n second interfaces, the second interfaces are radially uniformly distributed on the side of the valve housing, and the angle between two adjacent second interfaces is (3 60 / 2n)°, each second interface corresponds to an equally divided position in the valve core, with a total of 2n equally divided positions, the valve core contains 4 channels and n-2 gaps, each channel has an inlet and an outlet, the inlet of the channel is connected to the first interface, the channel outlet is distributed in different equally divided positions corresponding to the second interface, and the gap is distributed between the other two adjacent equally divided positions, by rotating the valve core of the 2n-position four-way valve, any two adjacent channel outlets can be connected to any two adjacent interfaces in the second interface, and the gap of the valve core can allow any two adjacent interfaces in the second interface to be connected; 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, 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. When the device is running, its The four first interfaces of one 2n-position four-way valve are correspondingly the raw liquid inlet, raw liquid outlet, clean water inlet for washing the raw liquid, and clean water outlet for washing the raw liquid; the four first interfaces of another 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, adsorption, water washing or elution of different adsorption columns can be achieved, and n≥3.

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