A multi-way valve and its series-parallel multi-mode adsorption system

Abstract

The present invention belongs to the field of adsorption, and discloses a multi-way valve and a series-parallel multi-mode adsorption system thereof. The system is composed of a plurality of adsorption columns and a multi-way valve for controlling the distribution of materials in different adsorption columns. By controlling the multi-way valve, parallel operation of multiple columns can be achieved, and series operation of multiple columns can also be achieved, so as to meet different application requirements. Compared with the traditional fixed-bed adsorption device based on two-way valves, the system has fewer valves, and the system structure and operation method are simple. In addition, for the multi-column series adsorption mode, the system can also control the multi-way valve to simultaneously perform water washing and elution under the condition of continuous adsorption, and can also perform intermittent alternating operation of water washing and elution, so as to minimize the use of adsorption columns and adsorption materials and improve the utilization rate of adsorption materials.

Description

Technical Field

[0001] The present invention belongs to the field of adsorption, and in particular, to a multi-way valve and a series-parallel multi-mode adsorption system thereof. Background Art

[0002] Adsorption is one of the common unit operations in the chemical industry and is widely used in the separation and enrichment of substances. The equipment used for adsorption operations is an adsorption system, among which fixed beds and continuous moving beds are two major types of commonly used equipment, which mainly consist of adsorption towers (columns), connecting pipes, valves, and control systems, etc.

[0003] Traditional fixed-bed adsorption systems have advantages such as small investment and simple structure. However, to achieve functions such as adsorption, water washing, and regeneration of multiple adsorption columns and their switching, there are many valves in the system, and the logic for controlling numerous valves is complex. In addition, the utilization rate of the adsorption material in the fixed-bed adsorption system is relatively low. Although the continuous moving bed system effectively solves the problem of low utilization rate of the adsorption material, the related equipment has high operating energy consumption and a complex system structure. To solve these problems, Chinese Patent CN104667999A discloses a novel ion exchange system based on a multi-way valve, which solves the problems of many valves in traditional fixed beds and high operating energy consumption in continuous moving beds by using a multi-way valve instead of a traditional two-way valve. However, this system contains at most only three groups of independent adsorption modules, has poor system adaptability, and has a complex logic for controlling the multi-way valve. 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 and a series-parallel multi-mode adsorption system thereof. By simple operation of the multi-way valve, parallel operation or series operation of multiple adsorption columns can be achieved, and on the premise of simplifying the system structure and operation method, the utilization rate of the adsorption material is improved.

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

[0006] The first aspect of the present invention discloses a multi-way valve, which includes a valve housing and a valve core. The valve housing has a plurality of first interfaces and a plurality of second interfaces. The valve core has a plurality of channels, and the number of channels is the same as the number of first interfaces. Each channel has an inlet and an outlet. The inlet of the channel is docked with the first interface, and the outlets of the plurality of channels are radially and evenly arranged. The valve core can rotate within the valve housing. When rotating the valve core, the inlet of the channel is always docked with the first interface, and by rotating the valve core, the outlet of any channel can be controlled to be docked with the second interface.

[0007] Further, the multi-way valve is a four-way four-port valve. The valve housing has 4 first interfaces and 1 second interface. The valve core has 4 channels. By sequentially rotating the valve core of the four-way four-port valve by 90°, the outlets of the four channels can be respectively and sequentially docked and communicated with the second interface.

[0008] Further, the multi-way valve is an eight-way eight-port valve. The valve housing has 8 first interfaces and 2 second interfaces. The valve core has 8 channels. The included angle between the 2 second interfaces is 45°. By rotating the valve core, the outlets of any two adjacent channels of the valve core can be docked and communicated with the 2 second interfaces.

[0009] Further, the multi-way valve is a three-way three-port valve. The valve housing has 3 first interfaces and 1 second interface. The valve core has 3 channels. By sequentially rotating the valve core of the three-way three-port valve by 120°, the outlets of the three channels can be respectively docked and communicated with the second interface in sequence.

[0010] Further, the multi-way valve is a six-way six-port valve. The valve housing has 6 first interfaces and 2 second interfaces. The valve core has 6 channels. The included angle between the 2 second interfaces is 60°. By rotating the valve core, the outlets of any two adjacent channels of the valve core can be docked and communicated with the 2 second interfaces.

[0011] On the other hand, the present invention discloses a series-parallel multi-mode adsorption system based on the multi-way valve, which includes a plurality of adsorption columns and a plurality of multi-way valves. By combining operations on the multi-way valves, parallel operation of multiple adsorption columns or series operation of multiple adsorption columns can be achieved.

[0012] Further, the system includes n (n≥1) adsorption columns and 2n (n≥1) four-way four-port valves. One adsorption column and 2 four-way four-port valves form an adsorption unit. The valve housing of the four-way four-port valve has 4 first interfaces and 1 second interface. The valve core has 4 channels. In each adsorption unit, the inlet and outlet of the adsorption column are respectively connected to the second interfaces of the two four-way four-port valves. In the same adsorption unit, the four first interfaces of the four-way four-port valve connected to the inlet of the adsorption column are respectively connected to the raw material liquid input pipe, the eluent input pipe, the clear water input pipe for washing the raw material liquid, and the clear water input pipe for washing the eluent. The four first interfaces of the four-way four-port valve connected to the outlet of the adsorption column are respectively connected to the raw material liquid output pipe, the eluent output pipe, the clear water output pipe for washing the raw material liquid, and the clear water output pipe for washing the eluent. During the operation of the system, by simultaneously rotating the valve cores of the two four-way four-port valves in the corresponding adsorption unit clockwise or counterclockwise by 90°, the adsorption column in the adsorption unit can be switched among adsorption, water washing, and elution.

[0013] Further, the system includes n (n≥1) adsorption columns and n (n≥1) eight-way eight-port valves. One adsorption column and one eight-way eight-port valve form an adsorption unit. The valve housing of the eight-way eight-port valve has 8 first interfaces and 2 second interfaces. The valve core has 8 channels. The 2 second interfaces of the eight-way eight-port valve are respectively connected to the inlet and outlet of the same adsorption column. The 8 first interfaces of the valve housing of the eight-way eight-port valve are respectively connected to the raw material liquid input pipe, the raw material liquid output pipe, the eluent input pipe, the eluent output pipe, the clear water input pipe for washing the raw material liquid, the clear water output pipe for washing the raw material liquid, the clear water input pipe for washing the eluent, and the clear water output pipe for washing the eluent. During the operation of the system, by rotating the valve core of the corresponding eight-way eight-port valve clockwise or counterclockwise by 90°, the adsorption column connected to the eight-way eight-port valve is switched between adsorption, water washing, and elution.

[0014] Further, when the number of adsorption columns n≥2, the system includes n (n≥2) adsorption columns, n (n≥2) eight-way eight-port valves, and n (n≥2) six-way four-port valves. The valve housing of the eight-way eight-port valve has 8 first interfaces and 2 second interfaces. The valve core has 8 channels. The 2 second interfaces of the eight-way eight-port valve are respectively connected to a six-way four-port valve. The inlet and outlet of the adsorption column are respectively connected to the two six-way four-port valves. The series / parallel connection of adjacent adsorption columns is controlled by the six-way four-port valve, and the entry and switching of materials are controlled by the eight-way eight-port valve.

[0015] Further, the system includes n (n≥1) adsorption columns and 2n (n≥1) three-way three-port valves. One adsorption column and 2 three-way three-port valves form an adsorption unit. The valve housing of the three-way three-port valve has 3 first interfaces and 1 second interface. The valve core has 3 channels. In each adsorption unit, the inlet and outlet of the adsorption column are respectively connected to the second interfaces of the two three-way three-port valves. In the same adsorption unit, the 3 first interfaces of the three-way three-port valve connected to the inlet of the adsorption column are respectively connected to the raw material liquid input pipe, the eluent input pipe, the clear water input pipe for washing the raw material liquid / the clear water input pipe for washing the eluent, and the 3 first interfaces of the three-way three-port valve connected to the outlet of the adsorption column are respectively connected to the raw material liquid output pipe, the eluent output pipe, the clear water output pipe for washing the raw material liquid / the clear water output pipe for washing the eluent. During the operation of the system, by simultaneously rotating the valve cores of the two three-way three-port valves in the corresponding adsorption unit clockwise or counterclockwise by 120°, the adsorption column in the adsorption unit is switched between adsorption, water washing, and elution.

[0016] Further, it includes n (n≥1) adsorption columns and n (n≥1) six-position six-way valves. One adsorption column and one six-position six-way valve form an adsorption unit. The valve housing of the six-position six-way valve has 6 first interfaces and 2 second interfaces. The valve core has 6 channels. The 2 second interfaces of the six-position six-way valve are respectively connected to the inlet and outlet of the same adsorption column. The 6 first interfaces of the valve housing of the six-position six-way valve are respectively connected to the raw material liquid input pipe, the eluent input pipe, the clear water input pipe for washing the raw material liquid / the clear water input pipe for washing the eluent, the raw material liquid output pipe, the eluent output pipe, the clear water output pipe for washing the raw material liquid / the clear water output pipe for washing the eluent. During the operation of the system, by rotating the valve core of the corresponding six-position six-way valve clockwise or counterclockwise by 120°, the adsorption column connected to the six-position six-way valve can be switched among adsorption, water washing, and elution.

[0017] Further, the six-position four-way valve has a valve housing and a valve core. The side wall of the valve core is radially and evenly provided with 3 channels. The valve housing is provided with 4 interfaces, and the included angle between adjacent two interfaces is 60°. By rotating the valve core of the six-position four-way valve, any one of the channels of the valve core allows communication with any two adjacent interfaces on the valve housing.

[0018] Further, the 2 second interfaces of the eight-position eight-way valve are respectively the q interface and the r interface.

[0019] The 4 interfaces of the six-position four-way valve are successively the a interface, the b interface, the c interface, and the d interface.

[0020] The q interfaces and r interfaces of two adjacent eight-position eight-way valves are respectively connected to the a interface and the d interface of the same six-position four-way valve. The r interface of the last-stage eight-position eight-way valve is connected to the d interface of the six-position four-way valve connected to the first-stage adsorption column. The b interfaces and c interfaces of two adjacent six-position four-way valves are respectively connected to the inlet and outlet of the same adsorption column. The b interface of the last-stage six-position four-way valve is connected to the c interface of the first-stage six-position four-way valve.

[0021] During the operation of the system, the 8 first interfaces of the valve housing of the eight-position eight-way valve are respectively connected to the raw material liquid input pipe, the raw material liquid output pipe, the eluent input pipe, the eluent output pipe, the clear water input pipe for washing the raw material liquid, the clear water output pipe for washing the raw material liquid, the clear water input pipe for washing the eluent, and the clear water output pipe for washing the eluent. By rotating the valve core of the eight-position eight-way valve in the corresponding adsorption unit clockwise or counterclockwise by 120°, the adsorption column in the adsorption unit can be switched among adsorption, water washing, and elution. By rotating the valve core of the corresponding six-position four-way valve clockwise or counterclockwise by 60°, the series or parallel connection of two adjacent adsorption columns connected to the six-position four-way valve can be realized.

[0022] The advantages and positive effects of the present invention are:

[0023] The adsorption system of the present invention uses a multi-way valve to replace the traditional two-way valve, which not only significantly reduces the number of valves, but also simplifies the system structure and operation method; this system can arbitrarily increase the number of adsorption columns according to actual needs, and only by rotating the multi-way valve, it can achieve parallel operation of multiple columns and series operation of multiple columns, thus meeting different application requirements; by controlling the multi-way valve, this system can, under the condition of continuous adsorption, not only realize the simultaneous water washing and elution, but also realize the intermittent alternating operation of water washing and elution, thus minimizing the use of adsorption columns and adsorption materials and improving the utilization rate of adsorption materials. Description of the Drawings

[0024] Figure 1 Schematic structural diagram of the adsorption system in Embodiment 1;

[0025] Figure 2 Schematic structural diagram of the eight-way eight-position valve in Embodiment 1, where A is the top perspective view of the eight-way eight-position valve; B is the front perspective view of the eight-way eight-position valve; C is the top perspective view of the eight-way eight-position valve after the valve core rotates 90° clockwise;

[0026] Figure 3 Schematic structural diagram of the four-way six-position valve in Embodiment 1, where A is the top perspective view of the four-way six-position valve; B is the front perspective view of the four-way six-position valve; C is the top perspective view of the four-way six-position valve in A after the valve core rotates 60° counterclockwise;

[0027] Figure 4 Schematic structural diagram of the adsorption system in Embodiment 1 in the intermittent operation state of water washing and elution;

[0028] Figure 5 Schematic structural diagram of the adsorption system in Embodiment 1 in the state of parallel operation of each adsorption column;

[0029] Figure 6 Schematic structural diagram of the adsorption system in Embodiment 2;

[0030] Figure 7 Schematic structural diagram of the adsorption system in Embodiment 3;

[0031] Figure 8 Schematic structural diagram of the adsorption system in Embodiment 4;

[0032] Figure 9 Schematic structural diagram of the adsorption system in Embodiment 5;

[0033] Figure 10 Schematic structural diagram of the adsorption system in Embodiment 6;

[0034] Figure 11Schematic structural diagram of the four-way four-position valve in Embodiment 6, where A is the top perspective view of the four-way four-position valve; B is the front perspective view of the four-way four-position valve; C is the top perspective view of the valve core of the four-way four-position valve in A after rotating 90° clockwise;

[0035] Figure 12 Schematic structural diagram of the adsorption system in Embodiment 7;

[0036] Figure 13 Schematic structural diagram of the three-way three-position valve in Embodiment 7, where A is the top perspective view of the three-way three-position valve; B is the front perspective view of the three-way three-position valve; C is the top perspective view of the valve core of the three-way three-position valve in A after rotating 120° clockwise;

[0037] Figure 14 Schematic structural diagram of the adsorption system in Embodiment 8;

[0038] Figure 15 Schematic structural diagram of the six-way six-position valve in Embodiment 8, where A is the top perspective view of the six-way six-position valve; B is the front perspective view of the six-way six-position valve; C is the top perspective view of the valve core of the six-way six-position valve in A after rotating 120° clockwise.

[0039] Explanation of the reference numerals in the figure: 1-4 or 58-61 are the raw material liquid inlet, eluent inlet, clear water inlet for washing the raw material liquid, and clear water inlet for washing the eluent in sequence; 5-8 or 62-65 are the raw material liquid outlet, eluent outlet, clear water outlet for washing the raw material liquid, and clear water outlet for washing the eluent in sequence; 9-14, 27-30, 39-41, 48-50, 54-55 are all eight-way eight-position valves; 15-20, 31-34, 42-44 are all four-way six-position valves; 21-26, 35-38, 45-47, 51-53, 56-57, 72-74, 81-83, 87-89 are all adsorption columns; 66-71 are all four-way four-position valves; 75-80 are all three-way three-position valves; 84-86 are all six-way six-position valves. Detailed implementation manners

[0040] 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 descriptive and not restrictive, and the protection scope of the present invention cannot be limited thereby.

[0041] Embodiment 1

[0042] A series-parallel multi-mode adsorption system based on eight-way eight-position valves and four-way six-position valves, an adsorption system composed of 6 adsorption columns, 6 eight-way eight-position valves and 6 four-way six-position valves, and the system structure is as Figure 1 shown. In the figure, 1 adsorption column and 1 eight-way eight-position valve form an adsorption unit, and there are a total of 6 units. The four-way six-position valve between two eight-way eight-position valves controls the series or parallel connection of two adjacent adsorption columns.

[0043] The top view perspective and the front view perspective of the eight - port eight - way valve are shown respectively in Figure 2 A and B in the figure; the eight - port eight - way valve includes a valve housing and a valve core. The valve housing has 8 first interfaces (i - p interfaces) and 2 second interfaces (q interface, r interface). The valve core has 8 channels (a - h channels). The inlets of the channels are docked with the first interfaces. The outlets of the 8 channels are radially arranged evenly. The included angle between the 2 second interfaces is 45°. The valve core can rotate within the valve housing. When rotating the valve core, the outlets of any two adjacent channels of the valve core can be docked and communicated with the 2 second interfaces. The top of the valve housing contains four first interfaces i - l. These four first interfaces are respectively communicated with the inlets of the e - h channels of the valve core through four circular liquid - distributing rings at the top, that is, the i interface is communicated with the inlet of the g channel, the j interface is communicated with the inlet of the e channel, the k interface is communicated with the inlet of the f channel, and the l interface is communicated with the inlet of the h channel. The bottom of the valve housing of the eight - port eight - way valve contains four first interfaces m - p. These four first interfaces are respectively communicated with the a - d channels of the valve core through four circular liquid - distributing rings at the bottom, that is, the m interface is communicated with the inlet of the c channel, the n interface is communicated with the inlet of the a channel, the o interface is communicated with the inlet of the b channel, and the p interface is communicated with the inlet of the d channel. By rotating the circular valve core of the eight - port eight - way valve, the outlets of any two adjacent channels of the circular valve core can be communicated with the two second interfaces q and r. Figure 2 The state of the valve core of the eight - port eight - way valve shown in A in the figure after rotating clockwise by 90° is as Figure 2 shown in C in the figure.

[0044] As Figure 3 shown, a six - port four - way valve includes a valve housing and a valve core. The top view perspective and the front view perspective of the six - port four - way valve are shown respectively in Figure 3 A and B in the figure. The circular valve core of the six - port four - way valve is equally divided into six sectors. There is a notch (channel) between each adjacent two sector equal - division positions, a total of three notches. On the side of the valve housing of the six - port four - way valve, there are four interfaces a - d. The included angle between adjacent two interfaces is 60°. And by rotating the valve core of the six - port four - way valve, any one notch of the valve core allows any two adjacent interfaces on the valve housing to be communicated. Figure 3 The state of the valve core of the six - port four - way valve shown in A in the figure after rotating counterclockwise by 60° is as Figure 3 shown in C in the figure.

[0045] Figure 1In the system shown, the r interface of the eight-way eight-port valve 9 and the q interface of the eight-way eight-port valve 10 are respectively connected to the d interface and the a interface of the six-way four-port valve 16; the r interface of the eight-way eight-port valve 10 and the q interface of the eight-way eight-port valve 11 are respectively connected to the d interface and the a interface of the six-way four-port valve 17; the r interface of the eight-way eight-port valve 11 and the q interface of the eight-way eight-port valve 12 are respectively connected to the d interface and the a interface of the six-way four-port valve 18; the r interface of the eight-way eight-port valve 12 and the q interface of the eight-way eight-port valve 13 are respectively connected to the d interface and the a interface of the six-way four-port valve 19; the r interface of the eight-way eight-port valve 13 and the q interface of the eight-way eight-port valve 14 are respectively connected to the d interface and the a interface of the six-way four-port valve 20; the r interface of the eight-way eight-port valve 14 and the q interface of the eight-way eight-port valve 9 are respectively connected to the d interface and the a interface of the six-way four-port valve 15; the b interface of the six-way four-port valve 15 and the c interface of the six-way four-port valve 16 are respectively connected to the inlet and outlet of the adsorption column 21; the b interface of the six-way four-port valve 16 and the c interface of the six-way four-port valve 17 are respectively connected to the inlet and outlet of the adsorption column 22; the b interface of the six-way four-port valve 17 and the c interface of the six-way four-port valve 18 are respectively connected to the inlet and outlet of the adsorption column 23; the b interface of the six-way four-port valve 18 and the c interface of the six-way four-port valve 19 are respectively connected to the inlet and outlet of the adsorption column 24; the b interface of the six-way four-port valve 19 and the c interface of the six-way four-port valve 20 are respectively connected to the inlet and outlet of the adsorption column 25; the b interface of the six-way four-port valve 20 and the c interface of the six-way four-port valve 15 are respectively connected to the inlet and outlet of the adsorption column 26.

[0046] System operation method for synchronous operation of adsorption, water washing and elution: When the system is running, the eight first interfaces i - p of the valve housing of the eight-way eight-port valve are respectively connected to the material pipelines. Among them, the j interface is the eluent inlet, the k interface is the clear water outlet for washing the raw material liquid, the i interface is the clear water inlet for washing the raw material liquid, 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 eluent, the m interface is the clear water inlet for washing the eluent, and the p interface is the eluent outlet. When the system is in Figure 1 the state shown, the adsorption columns 21 and 22 are in series adsorption state, the adsorption column 23 is in the state of water washing the eluent, the adsorption columns 24 and 25 are in series elution state, and the adsorption column 26 is in the state of water washing the raw material liquid. When the adsorption column 21 is saturated with adsorption, simultaneously rotate the valve cores of the eight-way eight-port valves 9, 11, 12, 14 clockwise by 90°, and rotate the valve cores of the six-way four-port valves 16, 17, 19, 20 counterclockwise by 60°. At this time, the adsorption columns 22 and 23 are in series adsorption state, the adsorption column 24 is in the state of water washing the eluent, the adsorption columns 25 and 26 are in series elution state, and the adsorption column 21 is in the state of water washing the raw material liquid. When the adsorption column 22 is saturated with adsorption, rotate the valve cores of the eight-way eight-port valves 9, 10, 12, 13 clockwise by 90° again, and rotate the valve cores of the six-way four-port valves 15, 17, 18, 20 counterclockwise by 60°, and the system switches to the next state.

[0047] System operation method for washing and elution with intermittent operation: When the system is running, the eight first interfaces i to p of the valve housing of the eight-way eight-port valve are respectively connected to the material pipelines, and the connection method is exactly the same as that of the system for synchronous operation of adsorption, washing and elution. When the system is in Figure 4 the state shown, the adsorption columns 21, 22, and 23 are in series adsorption state, and the adsorption columns 24, 25, and 26 are in series elution state. After the elution of the adsorption column 24 is completed, rotate the valve core of the eight-way eight-port valve 12 clockwise by 90° and the valve core of the six-way four-port valve 19 counterclockwise by 60° at the same time. At this time, the adsorption column 24 is switched to the state of washing eluent. After the washing of the adsorption column 24 is completed, rotate the valve cores of the eight-way eight-port valves 9 and 12 clockwise by 90° and the valve cores of the six-way four-port valves 16 and 18 counterclockwise by 60° at the same time. At this time, the adsorption columns 22, 23, and 24 are in series adsorption state, the adsorption columns 25 and 26 continue to be in series elution state, and the adsorption column 21 is in the state of washing raw material liquid. After the washing of the adsorption column 21 is completed, rotate the valve core of the eight-way eight-port valve 9 clockwise by 90° and the valve core of the six-way four-port valve 15 counterclockwise by 60° again at the same time. At this time, the adsorption columns 22, 23, and 24 continue to be in series adsorption state, and the adsorption columns 25, 26, and 21 are in series elution state.

[0048] System operation method for parallel operation of each adsorption column: When each adsorption column is in parallel operation, all six-way four-port valves are in Figure 3 state C in, and the states of all six-way four-port valves remain unchanged during the operation of the system. The connection method of the eight first interfaces i to p of the valve housing of the eight-way eight-port valve to each material pipeline is exactly the same as that of the system for synchronous operation of adsorption, washing and elution. When the system is in Figure 5 the state shown, each adsorption column is in parallel operation, and the adsorption columns 21 and 22 are in parallel adsorption state; the adsorption columns 23 and 24 are in parallel elution state; the adsorption columns 25 and 26 are in parallel washing raw material liquid state. By rotating the valve core of the corresponding eight-way eight-port valve clockwise by 90°, each adsorption column can be alternately switched between adsorption, washing raw material liquid, elution, and washing eluent.

[0049] Example 2

[0050] A series-parallel multi-mode adsorption system based on an eight-way eight-port valve and a six-way four-port valve, an adsorption system composed of 4 adsorption columns, 4 eight-way eight-port valves and 4 six-way four-port valves, the system structure is as Figure 6 shown. In the figure, the structures of the eight-way eight-port valve and the six-way four-port valve, as well as the connection methods of each pipeline, are exactly the same as those in Example 1. When the system is in synchronous operation of adsorption, washing and elution, it is actually the parallel operation of each adsorption column of the system. At this time, all six-way four-port valves are in Figure 3 state C in, and the states of all six-way four-port valves remain unchanged during the operation of the system. When the system is inFigure 6 When in the state shown, the adsorption columns 35 - 38 are respectively in the adsorption state, the water - washing eluent state, the elution state, and the water - washing raw material liquid state. By rotating the valve cores of all eight - way eight - port valves clockwise by 90°, the adsorption columns 35 - 38 are respectively switched to the water - washing raw material liquid state, the adsorption state, the water - washing eluent state, and the elution state. When the system is in the intermittent operation mode of water - washing and elution, its operation method is the same as the operation method of the system in the intermittent operation of water - washing and elution in Embodiment 1.

[0051] Embodiment 3

[0052] A series - parallel multi - mode adsorption system based on eight - way eight - port valves and six - way four - port valves, an adsorption system composed of 3 adsorption columns, 3 eight - way eight - port valves, and 3 six - way four - port valves. The system structure is as Figure 7 shown. In the figure, the structures of the eight - way eight - port valves and six - way four - port valves, as well as the connection methods of each pipeline, are exactly the same as those in Embodiment 1. Since this system only contains three adsorption columns, it can realize the parallel operation mode of each adsorption column and the intermittent operation mode of water - washing and elution. When the system is in the parallel operation mode of each adsorption column, its operation method is exactly the same as the operation method of the parallel operation mode of each adsorption column in Embodiment 1. When the system is in the intermittent operation mode of water - washing and elution, that is Figure 7 when in the state shown, the adsorption columns 45 and 46 are in the series adsorption state, and the adsorption column 47 is in the elution state. After the adsorption column 47 is eluted, rotate the valve core of the eight - way eight - port valve 41 clockwise by 90°. At this time, the adsorption column 47 is switched to the water - washing eluent state. After the adsorption column 47 is water - washed, rotate the valve cores of the eight - way eight - port valves 39 and 41 clockwise simultaneously, and rotate the valve cores of the six - way four - port valves 43 and 44 counterclockwise by 60°. At this time, the adsorption column 45 is in the water - washing raw material liquid state, and the adsorption columns 46 and 47 are in the series adsorption state. After the adsorption column 45 is water - washed, rotate the valve core of the eight - way eight - port valve 39 clockwise by 90° again. At this time, the adsorption columns 46 and 47 continue to be in the series adsorption state, while the adsorption column 45 is in the elution state.

[0053] Embodiment 4

[0054] A parallel adsorption system based on eight - way eight - port valves, an adsorption system composed of 3 adsorption columns and 3 eight - way eight - port valves. The system structure is as Figure 8 shown. In the figure, 1 adsorption column and 1 eight - way eight - port valve form an adsorption unit, and there are a total of three adsorption units. The structure of the eight - way eight - port valves in the system and the connection methods of the eight first interfaces i - p at the top and bottom of the eight - way eight - port valves with each material pipeline are exactly the same as those in Embodiment 1.

[0055] In each adsorption unit, the q port and r port of the eight-way eight-port valve are respectively connected to the inlet and outlet of the adsorption column. Since this system does not contain a six-way four-port valve, only the parallel adsorption function of each adsorption column can be achieved. By rotating the valve core of the eight-way eight-port valve in any adsorption unit clockwise or counterclockwise by 90°, the adsorption column in this adsorption unit can be cyclically switched among adsorption, washing the raw material liquid, elution, and washing the eluent.

[0056] Example 5

[0057] A parallel adsorption system based on an eight-way eight-port valve, an adsorption system composed of 2 adsorption columns and 2 eight-way eight-port valves, the system structure is as Figure 9 shown. In the figure, 1 adsorption column and 1 eight-way eight-port valve form an adsorption unit, and there are two adsorption units in total. The structure of the eight-way eight-port valve in the system and the connection method of the eight first ports (i - p) at the top and bottom of the eight-way eight-port valve to each material pipeline are exactly the same as those in Example 1. The function and operation method of this system are exactly the same as those of the system in Example 4.

[0058] Example 6

[0059] A parallel adsorption system based on a four-way four-port valve, an adsorption system composed of 3 adsorption columns and 6 four-way four-port valves, the system structure is as Figure 10 shown. In the figure, 1 adsorption column and 2 four-way four-port valves form an adsorption unit, and there are three adsorption units in total.

[0060] The top view perspective view and the front view perspective view of the four-way four-port valve are respectively shown in Figure 11 A and B in it. The bottom of the valve housing has 4 first ports (e - h ports) and 1 second port (i port). These four first ports at the bottom of the valve housing 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 f port is connected to the inlet of the a channel, the g port is connected to the inlet of the b channel, the e port is connected to the inlet of the c channel, and the h port is connected to the inlet of the d channel. The valve core has 4 channels (a - d channels), and the outlets of the 4 channels are radially evenly arranged. By sequentially rotating the valve core of the four-way four-port valve by 90°, the outlets of the four channels can be respectively connected to the second port (i port) in sequence. Figure 11 The top view perspective view of the valve core of the four-way four-port valve shown in A in it after rotating clockwise by 90° is shown in Figure 11 C in it.

[0061] System operation and operation method: When the system is running, the four first interfaces e - h of the valve housing of the four - way four - position valve connected to the inlet of the adsorption column are respectively connected to the material inlet pipeline. Among them, the f interface is the raw material liquid inlet, the g interface is the clear water inlet for washing the eluent, the e interface is the eluent inlet, and the h interface is the clear water inlet for washing the raw material liquid. The four interfaces e - h of the valve housing of the four - way four - position valve connected to the outlet of the adsorption column are respectively connected to the material outlet pipeline. Among them, the f interface is the raw material liquid outlet, the g interface is the clear water outlet for washing the eluent, the e interface is the eluent outlet, and the h interface is the clear water outlet for washing the raw material liquid. This system can only achieve the parallel operation of each adsorption column. During the system operation, by simultaneously rotating the valve cores of the two four - way four - position valves in the corresponding adsorption unit clockwise or counterclockwise by 90°, the adsorption column in the adsorption unit can be cyclically switched among adsorption, washing the raw material liquid, elution, and washing the eluent.

[0062] Example 7

[0063] A parallel adsorption system based on three - way three - position valves, including 3 adsorption columns and 6 three - way three - position valves, the system structure is as Figure 12 shown. In the figure, 1 adsorption column and 2 three - way three - position valves form an adsorption unit, and there are a total of 3 adsorption units.

[0064] The top - view perspective view and the front - view perspective view of the three - way three - position valve are respectively shown in Figure 13 A and B in. As Figure 13 shown in A in, the three - way three - position valve includes a valve housing and a valve core. The valve core can rotate within the valve housing. The valve housing has 3 first interfaces (d - f interfaces) and 1 second interface (g interface). The valve core has 3 channels (a - c channels). The outlets of the 3 channels are radially evenly arranged. The 3 first interfaces are respectively connected to the inlets of the 3 channels through three circular liquid - distributing rings at the top. By sequentially rotating the valve core of the three - way three - position valve by 120°, the outlets of the three channels can be respectively and sequentially docked and connected to the second interface (g interface).

[0065] In each adsorption unit, the inlet and outlet of the adsorption column are respectively connected to the second interfaces (g interfaces) of the two three - way three - position valves. Within the same adsorption unit, the three first interfaces of the three - way three - position valve connected to the inlet of the adsorption column are respectively connected to the material interfaces. When only washing the raw material liquid, the e interface is connected to the raw material liquid input pipe, the d interface is connected to the clear water input pipe for washing the raw material liquid, and the f interface is connected to the eluent input pipe. The e interface of the three - way three - position valve connected to the outlet of the adsorption column is connected to the raw material liquid output pipe, the d interface is connected to the clear water output pipe for washing the raw material liquid, and the f interface is connected to the eluent output pipe. During the system operation, by simultaneously rotating the valve cores of the two three - way three - position valves in the corresponding adsorption unit clockwise or counterclockwise by 120°, the adsorption column in the adsorption unit is switched among adsorption, washing, and elution. Figure 13 The top - view perspective view of the valve core of the three - way three - position valve shown in A in after rotating clockwise by 120° is shown inFigure 13 C in the middle.

[0066] Example 8

[0067] A parallel adsorption system based on a six - position six - way valve, comprising 3 adsorption columns and 3 six - position six - way valves. The system structure is as Figure 14 shown. In the figure, 1 adsorption column and 1 six - position six - way valve form an adsorption unit, and there are a total of 3 adsorption units.

[0068] The top - view perspective and front - view perspective of the six - position six - way valve are shown in Figure 15 A and B in the middle. As Figure 15 The six - position six - way valve shown in A in the middle includes a valve housing and a valve core. The valve core can rotate within the valve housing. The valve housing has 6 first interfaces (g - l interfaces) and 2 second interfaces (m interface, n interface). The valve core has 6 channels (a - f channels). The 6 first interfaces are respectively connected to the inlets of the 6 channels through 6 circular liquid - distributing rings at the top and bottom. The outlets of the 6 channels are radially and evenly arranged. By rotating the valve core, the outlets of any two adjacent channels of the valve core can be docked and connected to the 2 second interfaces (m interface, n interface).

[0069] Within each adsorption unit, the 2 second interfaces (m interface, n interface) of the same six - position six - way valve are respectively connected to the inlet and outlet of the same adsorption column. When only washing the raw material liquid, the h interface of the six - position six - way valve housing is connected to the raw material liquid input pipe, the i interface is connected to the eluent output pipe, the g interface is connected to the eluent input pipe, the k interface is connected to the clear water output pipe for washing the raw material liquid, the l interface is connected to the clear water input pipe for washing the raw material liquid, and the j interface is connected to the raw material liquid output pipe. During the operation of the system, by rotating the valve core of the corresponding six - position six - way valve clockwise or counterclockwise by 120°, the adsorption column connected to this six - position six - way valve can be switched among adsorption, water washing, and elution. Figure 15 The top - view perspective of the valve core of the six - position six - way valve shown in A in the middle after rotating clockwise by 120° is shown in Figure 15 C in the middle.

[0070] It should be understood that the detailed description of the technical solution of the present invention with the aid 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 perform equivalent substitution on some of the technical features. For example, by changing the number of spool channels of the corresponding multi-way valve and the number of valve housing interfaces, the adsorption system is made to contain only one water wash to achieve washing only the raw material liquid or only the eluent; the water wash raw material liquid interface and the water wash eluent interface of the multi-way valve housing are combined into one interface, thereby simplifying the valve body structure and reducing the number of material pumps. Without departing from the spirit and scope of the present invention, there will be various changes and improvements to the present invention, 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. An adsorption system based on a multi-way valve, characterized in that It includes n adsorption columns, n eight-way eight-port valves and n six-way four-port valves, where n≥2. The eight-way eight-port valve includes a valve housing and a valve core. The valve housing has 8 first interfaces and 2 second interfaces. The valve core has 8 channels. The included angle between the 2 second interfaces is 45°. Each channel has an inlet and an outlet. The outlets of the 8 channels are radially and evenly arranged. The valve core can rotate within the valve housing. When rotating the valve core, the inlet of the channel is always docked with the first interface. By rotating the valve core, the outlet of any channel can be controlled to be docked with the second interface. The six-way four-port valve includes a valve housing and a circular valve core. The circular valve core is equally divided into six sectors, and there is a notch between adjacent two sector equal division positions, with a total of three notches. On the side of the valve housing of the six-way four-port valve, there are interfaces a, b, c, and d. The included angle between adjacent two interfaces is 60°. And by rotating the valve core of the six-way four-port valve, any notch of the valve core allows any two adjacent interfaces on the valve housing to communicate. The 2 second interfaces of the eight-way eight-port valve are respectively connected to the d interface and the a interface of a six-way four-port valve. The inlets and outlets of the adsorption columns are respectively connected to the b interfaces and c interfaces of the two six-way four-port valves. The series / parallel connection of adjacent adsorption columns is controlled by the six-way four-port valve, and the entry and switching of materials are controlled by the eight-way eight-port valve.

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