Multi-ported valve and series-parallel multi-mode adsorption system thereof

Abstract

The invention belongs to the field of adsorption, and discloses a multi-way valve and a series-parallel multi-mode adsorption system thereof, and the system is composed of a plurality of adsorption columns and a plurality of multi-way valves for controlling materials to be distributed in different adsorption columns. By controlling the multi-way valve, parallel operation of multiple columns can be achieved, series operation of the multiple columns can also be achieved, and therefore different application requirements are met. Compared with a traditional fixed bed adsorption device based on a two-way valve, the system is small in number of valves and simple in structure and operation method. Besides, aiming at a multi-column series-connection adsorption mode, the system can realize simultaneous water washing and elution and interval alternate operation of water washing and elution by controlling a multi-way valve under the condition of meeting continuous adsorption, so that the use of adsorption columns and adsorption materials is reduced to the maximum extent, and the utilization rate of the adsorption materials is improved.

Description

Technical Field

[0001] The invention belongs to the field of adsorption, 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 operation is the adsorption system, of which fixed bed and continuous moving bed are two commonly used types of equipment, which are mainly composed of adsorption tower (column), connecting pipes, valves and control systems.

[0003] The traditional fixed bed adsorption system has the advantages of small investment and simple structure, but in order to realize the functions of adsorption, water washing, regeneration and switching of multiple adsorption columns, the system has many valves, and the logic of controlling many valves is complex. In addition, the utilization rate of adsorption materials in the fixed bed adsorption system is low. Although the continuous moving bed system effectively solves the problem of low utilization of adsorption materials, the energy consumption of related equipment is high and the system structure is complex. To solve these problems, Chinese patent CN104667999A discloses a new ion exchange system based on a multi-way valve. By using a multi-way valve instead of a traditional two-way valve, the problems of many traditional fixed bed valves and high energy consumption of continuous moving bed operation are solved. However, the system contains only three independent adsorption modules at most, the system adaptability is poor, and the logic of multi-way valve control is complex. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a multi-way valve and a series-parallel multi-mode adsorption system thereof, which can realize parallel operation or series operation of multiple adsorption columns through simple operation of the multi-way valve, thereby improving the utilization rate of the adsorption material while simplifying the system structure and operation method.

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

[0006] A first aspect of the present invention discloses a multi-way valve, comprising a valve housing and a valve core, wherein the valve housing has a plurality of first interfaces and a plurality of second interfaces, the valve core has a plurality of channels, 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 connected to the first interface, and the outlets of the plurality of channels are radially uniformly arranged, the valve core can rotate in the valve housing, and when the valve core is rotated, the inlet of the channel is always connected to the first interface, and the outlet of any channel can be controlled to connect to the second interface by rotating the valve core.

[0007] Furthermore, the multi-way valve is a four-position four-way valve, the valve housing has four first interfaces and one second interface, the valve core has four channels, and by rotating the valve core of the four-position four-way valve 90° in sequence, the outlets of the four channels can be connected to the second interface in sequence.

[0008] Furthermore, the multi-way valve is an eight-position eight-way valve, the valve housing has eight first interfaces and two second interfaces, the valve core has eight channels, the angle between the two second interfaces is 45°, and by rotating the valve core, the outlets of any two adjacent channels of the valve core can be connected to the two second interfaces.

[0009] Furthermore, the multi-way valve is a three-position three-way valve, the valve housing has three first interfaces and one second interface, the valve core has three channels, and by rotating the valve core of the three-position three-way valve 120° in sequence, the outlets of the three channels can be connected to the second interface in sequence.

[0010] Furthermore, the multi-way valve is a six-position six-way valve, the valve housing has six first interfaces and two second interfaces, the valve core has six channels, the angle between the two second interfaces is 60°, and by rotating the valve core, the outlets of any two adjacent channels of the valve core can be connected to the two second interfaces.

[0011] On the other hand, the present invention discloses a series-parallel multi-mode adsorption system based on the multi-way valve, including multiple adsorption columns and multiple multi-way valves. Through the combined operation of the multi-way valves, the parallel operation of multiple adsorption columns or the series operation of multiple adsorption columns can be realized.

[0012] Furthermore, the system includes n (n≥1) adsorption columns and 2n (n≥1) four-position four-way valves, one adsorption column and two four-position four-way valves constitute an adsorption unit, the valve shell of the four-position four-way valve has four first interfaces and one second interface, the valve core has four channels, in each adsorption unit, the inlet and outlet of the adsorption column are respectively connected to the second interfaces of the two four-position four-way valves, in the same adsorption unit, the four first interfaces of the four-position four-way valve connected to the inlet of the adsorption column are respectively connected to the raw material liquid input pipe, the eluent input pipe, the clean water input pipe for washing the raw material liquid, and the clean water input pipe for washing the eluent, and the four first interfaces of the four-position four-way valve connected to the outlet of the adsorption column are respectively connected to the raw material liquid output pipe, the eluent output pipe, the clean water output pipe for washing the raw material liquid, and the clean water output pipe for washing the eluent. During the operation of the system, the adsorption column in the adsorption unit is switched between adsorption, water washing and elution by rotating the valve cores of the two four-position four-way valves in the corresponding adsorption unit by 90° clockwise or counterclockwise at the same time.

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

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

[0015] Furthermore, it comprises n (n≥1) adsorption columns and 2n (n≥1) three-position three-way valves, one adsorption column and two three-position three-way valves constitute one adsorption unit, the valve shell of the three-position three-way valve has three first interfaces and one second interface, the valve core has three channels, in each adsorption unit, the inlet and outlet of the adsorption column are respectively connected to the second interfaces of the two three-position three-way valves, in the same adsorption unit, the three first interfaces of the three-position three-way valve connected to the inlet of the adsorption column are respectively connected to the raw material liquid input pipe, the eluent input pipe, the clean water input pipe for washing the raw material liquid / the clean water input pipe for washing the eluent, and the three first interfaces of the three-position three-way valve connected to the outlet of the adsorption column are respectively connected to the raw material liquid output pipe, the eluent output pipe, the clean water output pipe for washing the raw material liquid / the clean water output pipe for washing the eluent. During the operation of the system, the valve cores of the two three-position three-way valves in the corresponding adsorption unit are simultaneously rotated 120° clockwise or counterclockwise to realize the switching of the adsorption column in the adsorption unit between adsorption, water washing and elution.

[0016] Furthermore, it comprises n (n≥1) adsorption columns and n (n≥1) six-position six-way valves, one adsorption column and one six-position six-way valve constitute one adsorption unit, the valve shell of the six-position six-way valve has six first interfaces and two second interfaces, the valve core has six channels, the two second interfaces of the six-position six-way valve are respectively connected to the inlet and outlet of the same adsorption column, the six first interfaces of the valve shell of the six-position six-way valve are respectively connected to the raw material liquid input pipe, the eluent input pipe, the clean water input pipe for washing the raw material liquid / the clean water input pipe for washing the eluent, the raw material liquid output pipe, the eluent output pipe, the clean water output pipe for washing the raw material liquid / the clean water output pipe for washing the eluent, and during the operation of the system, the adsorption column connected to the six-position six-way valve is switched between adsorption, water washing and elution by rotating the valve core of the corresponding six-position six-way valve 120° clockwise or counterclockwise.

[0017] Furthermore, 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 three channels, the valve housing is provided with four interfaces, and the angle between two adjacent interfaces is 60°. By rotating the valve core of the six-position four-way valve, any channel of the valve core is allowed to communicate with any two adjacent interfaces on the valve housing.

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

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

[0020] The q interface and r interface of two adjacent eight-position eight-way valves are respectively connected to the a interface and d interface of the same six-position four-way valve, and 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 interface and c interface of two adjacent six-position four-way valves are respectively connected to the inlet and outlet of the same adsorption column, and 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] When the system is running, the eight 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 clean water input pipe for washing the raw material liquid, the clean water output pipe for washing the raw material liquid, the clean water input pipe for washing the eluent, and the clean water output pipe for washing the eluent. By rotating the valve core of the eight-position eight-way valve in the corresponding adsorption unit by 120° clockwise or counterclockwise, the adsorption column in the adsorption unit can be switched between adsorption, water washing and elution; by rotating the valve core of the corresponding six-position four-way valve by 60° clockwise or counterclockwise, 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 adopts a multi-way valve instead of a traditional two-way valve, which not only greatly reduces the number of valves, but also simplifies the system structure and operation method; the system can arbitrarily increase the number of adsorption columns according to actual needs, and only by rotating the multi-way valve, it can realize parallel operation of multiple columns and series operation of multiple columns, thereby meeting different application needs; through the control of the multi-way valve, the system can realize simultaneous water washing and elution, and intermittent alternating operation of water washing and elution under the condition of meeting continuous adsorption, thereby maximizing the reduction of the use of adsorption columns and adsorption materials and improving the utilization rate of adsorption materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the adsorption system structure in Example 1;

[0025] Figure 2 Schematic diagram of the structure of the eight-position eight-way valve in Example 1, wherein A is a top perspective view of the eight-position eight-way valve; B is a front perspective view of the eight-position eight-way valve; C is a top perspective view of the eight-position eight-way valve after the valve core is rotated 90° clockwise;

[0026] Figure 3 Schematic diagram of the structure of the six-position four-way valve in Example 1, wherein A is a top perspective view of the six-position four-way valve; B is a front perspective view of the six-position four-way valve; C is a top perspective view of the six-position four-way valve in A after the valve core is rotated 60° counterclockwise;

[0027] Figure 4 This is a schematic diagram of the structure of the adsorption system in Example 1 in the operation state of the water washing and elution interval;

[0028] Figure 5 This is a structural schematic diagram of the adsorption system in Example 1 in which the adsorption columns are in parallel operation;

[0029] Figure 6 Schematic diagram of the adsorption system structure in Example 2;

[0030] Figure 7 Schematic diagram of the adsorption system structure in Example 3;

[0031] Figure 8 This is a schematic diagram of the adsorption system structure in Example 4;

[0032] Fig. 9 Schematic diagram of the adsorption system structure in Example 5;

[0033] Fig.10 Schematic diagram of the adsorption system structure in Example 6;

[0034] Fig.11Schematic diagram of the structure of the four-position four-way valve in Example 6, wherein A is a top perspective view of the four-position four-way valve; B is a front perspective view of the four-position four-way valve; C is a top perspective view of the valve core of the four-position four-way valve in A after rotating 90° clockwise;

[0035] Fig.12 Schematic diagram of the adsorption system structure in Example 7;

[0036] Fig.13 A schematic diagram of the structure of the three-position three-way valve in Example 7, wherein A is a top perspective view of the three-position three-way valve; B is a front perspective view of the three-position three-way valve; and C is a top perspective view of the three-position three-way valve in A after the valve core is rotated 120° clockwise;

[0037] Fig.14 This is a schematic diagram of the adsorption system structure in Example 8;

[0038] Fig.15 Schematic diagram of the structure of the six-position six-way valve in Example 8, wherein A is a top perspective view of the six-position six-way valve; B is a front perspective view of the six-position six-way valve; and C is a top perspective view of the valve core of the six-position six-way valve in A after rotating 120° clockwise.

[0039] Explanation of the numbers in the figure: 1~4 or 58~61 are the raw liquid inlet, the eluent inlet, the clean water inlet for washing the raw liquid, and the clean water inlet for washing the eluent respectively; 5~8 or 62~65 are the raw liquid outlet, the eluent outlet, the clean water outlet for washing the raw liquid, and the clean water outlet for washing the eluent respectively; 9~14, 27~30, 39~41, 48~50, 54~55 are all eight-position eight-way valves; 15~20, 31~34, 42~44 are all six-position four-way 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-position four-way valves; 75~80 are all three-position three-way valves; 84~86 are all six-position six-way valves. DETAILED DESCRIPTION

[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 illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0041] Example 1

[0042] A multi-mode adsorption system based on an eight-position eight-way valve and a six-position four-way valve is connected in series and parallel, and is composed of six adsorption columns, six eight-position eight-way valves and six six-position four-way valves. The system structure is as follows: Figure 1 As shown in the figure, one adsorption column and one eight-position eight-way valve constitute one adsorption unit, with a total of six units. The six-position four-way valve between two eight-position eight-way valves controls the series connection or parallel connection of two adjacent adsorption columns.

[0043] The top and front perspective views of the eight-position eight-way valve are shown in Figure 2 A and B in the middle; the eight-position eight-way valve includes a valve housing and a valve core. The valve housing has eight first interfaces (i~p interfaces) and two second interfaces (q interface, r interface). The valve core has eight channels (a~h channels). The inlet of the channel is connected to the first interface. The outlets of the eight channels are evenly arranged radially. The angle between the two second interfaces is 45°. The valve core can rotate in the valve housing. When the valve core is rotated, the outlets of any two adjacent channels of the valve core can be connected to the two second interfaces. The top of the valve housing contains four first interfaces i~l. These four first interfaces are connected to the inlet of the e~h channels of the valve core through four circular liquid distribution rings on 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 eight-position eight-way valve contains four first interfaces m~p, which are respectively connected to the a~d channels of the valve core through the four circular liquid distribution rings at the bottom, that is, the m interface is connected to the c channel inlet, the n interface is connected to the a channel inlet, the o interface is connected to the b channel inlet, and the p interface is connected to the d channel inlet. By rotating the circular valve core of the eight-position eight-way valve, the outlets of any two adjacent channels of the circular valve core can be connected to the two second interfaces q and r. Figure 2 The state of the valve core of the eight-position eight-way valve shown in A after rotating 90° clockwise is as follows Figure 2 As shown in C.

[0044] like Figure 3 The six-position four-way valve shown in FIG. 1 includes a valve housing and a valve core. The top perspective view and the front perspective view of the six-position four-way valve are shown in FIG. Figure 3 A and B. The circular valve core of the six-position four-way valve is divided into six sectors, and there is a gap (channel) between two adjacent sectors, a total of three gaps. The side of the valve housing of the six-position four-way valve contains four interfaces a~d, and the angle between two adjacent interfaces is 60°. By rotating the valve core of the six-position four-way valve, any gap of the valve core allows any two adjacent interfaces on the valve housing to be connected. Figure 3 The state of the valve core of the six-position four-way valve shown in A after rotating 60° counterclockwise is as follows Figure 3 As shown in C.

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

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

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

[0048] System operation method of parallel operation of each adsorption column: When each adsorption column is operated in parallel, all six-position four-way valves are in Figure 3 The state of C in the middle, and the state of all six-position four-way valves remains unchanged during the operation of the system. The connection method of the eight first interfaces i~p of the eight-position eight-way valve housing and the material pipelines is exactly the same as the connection method of the system with simultaneous operation of adsorption, water washing and elution. When the system is in Figure 5 In the state shown, each adsorption column operates in parallel, and adsorption columns 21 and 22 are in a parallel adsorption state; adsorption columns 23 and 24 are in a parallel elution state; and adsorption columns 25 and 26 are in a parallel water-washing raw liquid state. By rotating the valve core of the corresponding eight-position eight-way valve 90° clockwise, each adsorption column can be alternately switched between adsorption, water-washing raw liquid, elution, and water-washing eluent.

[0049] Example 2

[0050] A multi-mode adsorption system based on an eight-position eight-way valve and a six-position four-way valve is connected in series and parallel, and is composed of four adsorption columns, four eight-position eight-way valves and four six-position four-way valves. The system structure is as follows Figure 6 As shown in the figure, the structure of the eight-position eight-way valve and the six-position four-way valve, as well as the connection mode of each pipeline are exactly the same as those in Example 1. When the system is in the synchronous operation of adsorption, water washing and elution, the adsorption columns of the system are actually operated in parallel. At this time, all the six-position four-way valves are in Figure 3 The system is in the state of C, and the states of all six-position four-way valves remain unchanged during system operation. Figure 6 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-position eight-way valves 90° clockwise, 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 water washing and elution interval operation mode, its operation method is the same as the system operation method of the water washing and elution interval operation in Example 1.

[0051] Example 3

[0052] A series-parallel multi-mode adsorption system based on an eight-position eight-way valve and a six-position four-way valve, an adsorption system consisting of three adsorption columns, three eight-position eight-way valves and three six-position four-way valves, the system structure is as follows Figure 7 As shown in the figure, the structure of the eight-position eight-way valve and the six-position four-way valve, as well as the connection method of each pipeline are exactly the same as those in Example 1. Since the system contains only three adsorption columns, the parallel operation mode of each adsorption column and the water washing and elution interval operation mode can be realized. 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 Example 1. When the system is in the water washing and elution interval operation mode, that is, Figure 7 In the state shown, adsorption columns 45 and 46 are in a series adsorption state, and adsorption column 47 is in an elution state. When the elution of adsorption column 47 is completed, the valve core of the eight-position eight-way valve 41 is rotated 90° clockwise, and the adsorption column 47 is switched to a water-washing eluent state. When the water washing of adsorption column 47 is completed, the valve cores of the eight-position eight-way valves 39 and 41 are rotated 90° clockwise, and the valve cores of the six-position four-way valves 43 and 44 are rotated 60° counterclockwise, and the adsorption column 45 is in a water-washing raw liquid state, and the adsorption columns 46 and 47 are in a series adsorption state. When the water washing of adsorption column 45 is completed, the valve core of the eight-position eight-way valve 39 is rotated 90° clockwise again, and the adsorption columns 46 and 47 continue to be in a series adsorption state, while the adsorption column 45 is in an elution state.

[0053] Example 4

[0054] A parallel adsorption system based on an eight-position eight-way valve, an adsorption system consisting of three adsorption columns and three eight-position eight-way valves, the system structure is as follows Figure 8 As shown in the figure, one adsorption column and one eight-position eight-way valve constitute one adsorption unit, and there are three adsorption units in total. The structure of the eight-position eight-way valve in the system and the connection method of the eight first interfaces i~p at the top and bottom of the eight-position eight-way valve and each material pipeline are exactly the same as those in Example 1.

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

[0056] Example 5

[0057] A parallel adsorption system based on an eight-position eight-way valve, an adsorption system consisting of two adsorption columns and two eight-position eight-way valves, the system structure is as follows Fig. 9 As shown. In the figure, one adsorption column and one eight-position eight-way valve constitute one adsorption unit, and there are two adsorption units in total. The structure of the eight-position eight-way valve in the system and the connection method of the eight first interfaces i~p at the top and bottom of the eight-position eight-way valve and each material pipeline are exactly the same as those in Example 1. The function and operation method of the 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-position four-way valve, an adsorption system consisting of three adsorption columns and six four-position four-way valves, the system structure is as follows Fig.10 As shown in the figure, one adsorption column and two four-position four-way valves constitute one adsorption unit, and there are three adsorption units in total.

[0060] The top and front perspective views of the four-position four-way valve are shown in Fig.11 In A and B, the bottom of the valve housing has four first interfaces (e~h interfaces) and one second interface (i interface). The four first interfaces at the bottom of the valve housing are respectively connected to the a~d channel inlets of the valve core through the four circular liquid distribution rings at the bottom, that is, the f interface is connected to the a channel inlet, the g interface is connected to the b channel inlet, the e interface is connected to the c channel inlet, and the h interface is connected to the d channel inlet. The valve core has four channels (a~d channels), and the outlets of the four channels are evenly arranged radially. By rotating the valve core of the four-position four-way valve 90° in sequence, the outlets of the four channels can be connected and connected to the second interface (i interface) in sequence. Fig.11 The top perspective view of the valve core of the four-position four-way valve shown in A is rotated 90° clockwise. Fig.11 As shown in C.

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

[0062] Example 7

[0063] A parallel adsorption system based on a three-position three-way valve includes three adsorption columns and six three-position three-way valves. The system structure is as follows: Fig.12 As shown in the figure, one adsorption column and two three-position three-way valves constitute one adsorption unit, and there are three adsorption units in total.

[0064] The top and front perspective views of the three-position three-way valve are shown in Fig.13 A and B. Fig.13 The three-position three-way valve shown in A includes a valve housing and a valve core. The valve core can rotate in the valve housing. The valve housing has three first interfaces (d~f interfaces) and one second interface (g interface). The valve core has three channels (a~c channels). The outlets of the three channels are evenly arranged radially. The three first interfaces are connected to the inlets of the three channels respectively through the three circular liquid distribution rings on the top. By rotating the valve core of the three-position three-way valve 120° in sequence, the outlets of the three channels can be connected to the second interface (g interface) in sequence.

[0065] In each adsorption unit, the inlet and outlet of the adsorption column are respectively connected to the second interfaces (g interfaces) of two three-position three-way valves. In the same adsorption unit, the three first interfaces of the three-position three-way valve connected to the inlet of the adsorption column are respectively connected to the material interfaces. When only the raw material liquid is washed with water, the e interface is connected to the raw material liquid input pipe, the d interface is connected to the clean 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-position three-way 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 clean water output pipe for washing the raw material liquid, and the f interface is connected to the eluent output pipe. During the operation of the system, the valve cores of the two three-position three-way valves in the corresponding adsorption unit are rotated 120° clockwise or counterclockwise at the same time to achieve the switching of the adsorption column in the adsorption unit between adsorption, water washing and elution. Fig.13 The top perspective view of the three-position three-way valve shown in A is shown after the valve core is rotated 120° clockwise. Fig.13 Middle C.

[0066] Example 8

[0067] A parallel adsorption system based on a six-position six-way valve includes three adsorption columns and three six-position six-way valves. The system structure is as follows: Fig.14 As shown in the figure, one adsorption column and one six-position six-way valve constitute one adsorption unit, and there are three adsorption units in total.

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

[0069] In each adsorption unit, the two second interfaces (m interface and 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 the raw material liquid is washed with water, 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 clean water output pipe for washing the raw material liquid, the l interface is connected to the clean 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, the adsorption column connected to the six-position six-way valve is switched between adsorption, water washing and elution by rotating the valve core of the corresponding six-position six-way valve 120° clockwise or counterclockwise. Fig.15 The top perspective view of the six-position six-way valve shown in A is shown in FIG. Fig.15 As shown in C.

[0070] It should be understood that the above detailed description of the technical solution of the present invention with the help of the preferred embodiment 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 therein. For example, by changing the number of valve core channels and the number of valve housing interfaces of the corresponding multi-way valve, the adsorption system contains only one water wash, realizing only water washing raw liquid or only water washing eluent; the water washing raw liquid interface and the water washing 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, the present invention will have various changes and improvements, which fall within the scope of the invention to be protected, and the scope of the invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A multi-way valve, comprising a valve housing and a valve core, characterized in that: The valve housing has multiple first interfaces and multiple second interfaces, and the valve core has multiple channels, 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 connected to the first interface, and the outlets of multiple channels are evenly arranged radially. The valve core can rotate in the valve housing. When the valve core is rotated, the inlet of the channel is always connected to the first interface, and the outlet of any channel can be controlled to connect to the second interface by rotating the valve core.

2. The multi-way valve according to claim 1, characterized in that: The multi-way valve is a four-position four-way valve, the valve housing has four first interfaces and one second interface, the valve core has four channels, and by rotating the valve core of the four-position four-way valve 90° in sequence, the outlets of the four channels can be connected to the second interface in sequence.

3. The multi-way valve according to claim 1, characterized in that: The multi-way valve is an eight-position eight-way valve, the valve housing has eight first interfaces and two second interfaces, the valve core has eight channels, the angle between the two second interfaces is 45°, and by rotating the valve core, the outlets of any two adjacent channels of the valve core can be connected to the two second interfaces.

4. The multi-way valve according to claim 1, characterized in that: The multi-way valve is a three-position three-way valve or a six-position six-way valve. The valve housing of the three-position three-way valve has three first interfaces and one second interface, and the valve core has three channels. By rotating the valve core of the three-position three-way valve 120° in sequence, the outlets of the three channels can be connected to the second interface in sequence; the valve housing of the six-position six-way valve has six first interfaces and two second interfaces, and the valve core has six channels. The angle between the two second interfaces is 60°. By rotating the valve core, the outlets of any two adjacent channels of the valve core can be connected to the two second interfaces.

5. A series-parallel multi-mode adsorption system based on the multi-way valve according to claim 1, characterized in that: The system comprises a plurality of adsorption columns and a plurality of multi-way valves, and the parallel operation of the plurality of adsorption columns or the series operation of the plurality of adsorption columns is realized by combined operation of the multi-way valves.

6. The multi-way valve series-parallel multi-mode adsorption system according to claim 5, characterized in that: The system comprises n (n≥1) adsorption columns and 2n (n≥1) four-position four-way valves, one adsorption column and two four-position four-way valves constitute one adsorption unit, the valve housing of the four-position four-way valve has four first interfaces and one second interface, the valve core has four channels, in each adsorption unit, the inlet and outlet of the adsorption column are respectively connected to the second interfaces of the two four-position four-way valves, in the same adsorption unit, the four first interfaces of the four-position four-way valve connected to the inlet of the adsorption column are respectively connected to the raw material liquid input pipe, the eluent input pipe, the clean water input pipe for washing the raw material liquid and the clean water input pipe for washing the eluent, and the four first interfaces of the four-position four-way valve connected to the outlet of the adsorption column are respectively connected to the raw material liquid output pipe, the eluent output pipe, the clean water output pipe for washing the raw material liquid and the clean water output pipe for washing the eluent. During the operation of the system, the valve cores of the two four-position four-way valves in the corresponding adsorption unit are simultaneously rotated 90° clockwise or counterclockwise to realize the switching of the adsorption column in the adsorption unit between adsorption, water washing and elution.

7. The multi-way valve series-parallel multi-mode adsorption system according to claim 5, characterized in that: The system comprises n (n≥1) adsorption columns and n (n≥1) eight-position eight-way valves, one adsorption column and one eight-position eight-way valve constitute an adsorption unit, the valve shell of the eight-position eight-way valve has eight first interfaces and two second interfaces, the valve core has eight channels, the two second interfaces of the eight-position eight-way valve are respectively connected to the inlet and outlet of the same adsorption column, the eight first interfaces of the valve shell of the eight-position eight-way valve are respectively connected to a raw material liquid input pipe, a raw material liquid output pipe, an eluent input pipe, an eluent output pipe, a clean water input pipe for washing raw material liquid, a clean water output pipe for washing raw material liquid, a clean water input pipe for washing eluent, and a clean water output pipe for washing eluent, and during the operation of the system, the adsorption column connected to the eight-position eight-way valve is switched between adsorption, water washing and elution by rotating the valve core of the corresponding eight-position eight-way valve 90° clockwise or counterclockwise.

8. The multi-way valve series-parallel multi-mode adsorption system according to claim 5, characterized in that: When the number of adsorption columns n≥2, the system includes n (n≥2) adsorption columns, n (n≥2) eight-position eight-way valves and n (n≥2) six-position four-way valves, the valve housing of the eight-position eight-way valve has eight first interfaces and two second interfaces, the valve core has eight channels, the two second interfaces of the eight-position eight-way valve are respectively connected to a six-position four-way valve, the inlet and outlet of the adsorption column are respectively connected to two six-position four-way valves, the series / parallel connection of adjacent adsorption columns is controlled by the six-position four-way valve, and the entry and switching of materials are controlled by the eight-position eight-way valve.

9. The multi-way valve series-parallel multi-mode adsorption system according to claim 5, characterized in that: The invention comprises n (n≥1) adsorption columns and 2n (n≥1) three-position three-way valves, wherein one adsorption column and two three-position three-way valves constitute one adsorption unit, the valve shell of the three-position three-way valve has three first interfaces and one second interface, the valve core has three channels, in each adsorption unit, the inlet and outlet of the adsorption column are respectively connected to the second interfaces of the two three-position three-way valves, in the same adsorption unit, the three first interfaces of the three-position three-way valve connected to the inlet of the adsorption column are respectively connected to the raw material liquid input pipe, the eluent input pipe, and the clean water output pipe for washing the raw material liquid / the clean water output pipe for washing the eluent, and the three first interfaces of the three-position three-way valve connected to the outlet of the adsorption column are respectively connected to the raw material liquid output pipe, the eluent output pipe, and the clean water output pipe for washing the raw material liquid / the clean water output pipe for washing the eluent. During the operation of the system, the valve cores of the two three-position three-way valves in the corresponding adsorption unit are simultaneously rotated 120° clockwise or counterclockwise to realize the switching of the adsorption column in the adsorption unit between adsorption, water washing and elution.

10. The multi-way valve series-parallel multi-mode adsorption system according to claim 5, characterized in that: The invention comprises n (n≥1) adsorption columns and n (n≥1) six-position six-way valves, wherein one adsorption column and one six-position six-way valve constitute one adsorption unit, the valve shell of the six-position six-way valve has six first interfaces and two second interfaces, the valve core has six channels, the two second interfaces of the six-position six-way valve are respectively connected to the inlet and outlet of the same adsorption column, the six first interfaces of the valve shell of the six-position six-way valve are respectively connected to a raw material liquid input pipe, a raw material liquid output pipe, an eluent input pipe, an eluent output pipe, a clean water input pipe for washing raw material liquid / a clean water input pipe for washing eluent, and a clean water output pipe for washing raw material liquid / a clean water output pipe for washing eluent, and during the operation of the system, the valve core of the corresponding six-position six-way valve is rotated 120° clockwise or counterclockwise to realize the switching of the adsorption column connected to the six-position six-way valve between adsorption, water washing and elution.

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